WorldWideScience

Sample records for cued selective reminding

  1. Selective Reminding and Free and Cued Selective Reminding in Mild Cognitive Impairment and Alzheimer Disease.

    Science.gov (United States)

    Lemos, Raquel; Afonso, Ana; Martins, Cristina; Waters, James H; Blanco, Filipe Sobral; Simões, Mário R; Santana, Isabel

    2016-01-01

    The Selective Reminding Test (SRT) and the Free and Cued Selective Reminding Test (FCSRT) are multitrial memory tests that use a common "selective reminding" paradigm that aims to facilitate learning by presenting only the missing words from the previous recall trial. While in the FCSRT semantic cues are provided to elicit recall, in the SRT, participants are merely reminded of the missing items by repeating them. These tests have been used to assess age-related memory changes and to predict dementia. The performance of healthy elders on these tests has been compared before, and results have shown that twice as many words were retrieved from long-term memory in the FCSRT compared with the SRT. In this study, we compared the tests' properties and their accuracy in discriminating amnestic mild cognitive impairment (aMCI; n = 20) from Alzheimer disease (AD; n = 18). Patients with AD performed significantly worse than patients with aMCI on both tests. The percentage of items recalled during the learning trials was significantly higher for the FCSRT in both groups, and a higher number of items were later retrieved, showing the benefit of category cueing. Our key finding was that the FCSRT showed higher accuracy in discriminating patients with aMCI from those with AD.

  2. Brain Metabolism Correlates of the Free and Cued Selective Reminding Test in Mild Cognitive Impairment.

    Science.gov (United States)

    Caffarra, Paolo; Ghetti, Caterina; Ruffini, Livia; Spallazzi, Marco; Spotti, Annamaria; Barocco, Federica; Guzzo, Caterina; Marchi, Massimo; Gardini, Simona

    2016-01-01

    Free and Cued Selective Reminding Test (FCSRT) measures immediate and delayed episodic memory and cueing sensitivity and is suitable to detect prodromal Alzheimer's disease (AD). The present study aimed at investigating the segregation effect of FCSRT scores on brain metabolism of memory-related structures, usually affected by AD pathology, in the Mild Cognitive Impairment (MCI) stage. A cohort of forty-eight MCI patients underwent FCSRT and 18F-FDG-PET. Multiple regression analysis showed that Immediate Free Recall correlated with brain metabolism in the bilateral anterior cingulate and delayed free recall with the left anterior cingulate and medial frontal gyrus, whereas semantic cueing sensitivity with the left posterior cingulate. FCSRT in MCI is associated with neuro-functional activity of specific regions of memory-related structures connected to hippocampal formation, such as the cingulate cortex, usually damaged in AD.

  3. The Free and Cued Selective Reminding Test Distinguishes Frontotemporal Dementia From Alzheimer's Disease

    Science.gov (United States)

    Lemos, Raquel; Duro, Diana; Simões, Mário R.; Santana, Isabel

    2014-01-01

    Memory impairment is often present in frontotemporal dementia (FTD) as a result of an inefficient use of learning strategies, sometimes leading to a misdiagnosis of Alzheimer's disease (AD). The Free and Cued Selective Reminding Test (FCSRT) is a memory test that controls attention and acquisition, by providing category cues in the learning process. The main goal of this study was to show the usefulness of the FCSRT in the distinction between behavioral (bv-) FTD and AD. Three matched subgroups of participants were considered: bv-FTD (n = 32), AD (n = 32), and a control group of healthy adults (n = 32). Results proved that while AD patients exhibited an overall impairment in FCSRT, bv-FTD subjects showed to benefit more from the controlled learning through category cues. AD patients were 25 times more likely to have an impaired FCSRT. The FCSRT has shown its utility in the distinction between bv-FTD and AD, therefore increasing the diagnostic accuracy. PMID:25062746

  4. Predicting dementia using socio-demographic characteristics and the Free and Cued Selective Reminding Test in the general population.

    Science.gov (United States)

    Mura, Thibault; Baramova, Marieta; Gabelle, Audrey; Artero, Sylvaine; Dartigues, Jean-François; Amieva, Hélène; Berr, Claudine

    2017-03-23

    Our study aimed to determine whether the consideration of socio-demographic features improves the prediction of Alzheimer's dementia (AD) at 5 years when using the Free and Cued Selective Reminding Test (FCSRT) in the general older population. Our analyses focused on 2558 subjects from the prospective Three-City Study, a cohort of community-dwelling individuals aged 65 years and over, with FCSRT scores. Four "residual scores" and "risk scores" were built that included the FCSRT scores and socio-demographic variables. The predictive performance of crude, residual and risk scores was analyzed by comparing the areas under the ROC curve (AUC). In total, 1750 subjects were seen 5 years after completing the FCSRT. AD was diagnosed in 116 of them. Compared with the crude free-recall score, the predictive performances of the residual score and of the risk score were not significantly improved (AUC: 0.83 vs 0.82 and 0.88 vs 0.89 respectively). Using socio-demographic features in addition to the FCSRT does not improve its predictive performance for dementia or AD.

  5. A normative study of the Italian printed word version of the free and cued selective reminding test.

    Science.gov (United States)

    Girtler, N; De Carli, F; Amore, M; Arnaldi, D; Bosia, L E; Bruzzaniti, C; Cappa, S F; Cocito, L; Colazzo, G; Ghio, L; Magi, E; Mancardi, G L; Nobili, F; Pardini, M; Picco, A; Rissotto, R; Serrati, C; Brugnolo, A

    2015-07-01

    According to the new research criteria for the diagnosis of Alzheimer's disease, episodic memory impairment, not significantly improved by cueing, is the core neuropsychological marker, even at a pre-dementia stage. The FCSRT assesses verbal learning and memory using semantic cues and is widely used in Europe. Standardization values for the Italian population are available for the colored picture version, but not for the 16-item printed word version. In this study, we present age- and education-adjusted normative data for FCSRT-16 obtained using linear regression techniques and generalized linear model, and critical values for classifying sub-test performance into equivalent scores. Six scores were derived from the performance of 194 normal subjects (MMSE score, range 27-30, mean 29.5 ± 0.5) divided per decade (from 20 to 90), per gender and per level of education (4 levels: 3-5, 6-8, 9-13, >13 years): immediate free recall (IFR), immediate total recall (ITR), recognition phase (RP), delayed free recall (DFR), delayed total recall (DTR), Index of Sensitivity of Cueing (ISC), number of intrusions. This study confirms the effect of age and education, but not of gender on immediate and delayed free and cued recall. The Italian version of the FCSRT-16 can be useful for both clinical and research purposes.

  6. The Role of Reminding in the Effects of Spaced Repetitions on Cued Recall: Sufficient but Not Necessary

    Science.gov (United States)

    Wahlheim, Christopher N.; Maddox, Geoffrey B.; Jacoby, Larry L.

    2014-01-01

    Three experiments examined the role of study-phase retrieval (reminding) in the effects of spaced repetitions on cued recall. Remindings were brought under task control to evaluate their effects. Participants studied 2 lists of word pairs containing 3 item types: single items that appeared once in List 2, within-list repetitions that appeared…

  7. The role of reminding in the effects of spaced repetitions on cued recall: sufficient but not necessary.

    Science.gov (United States)

    Wahlheim, Christopher N; Maddox, Geoffrey B; Jacoby, Larry L

    2014-01-01

    Three experiments examined the role of study-phase retrieval (reminding) in the effects of spaced repetitions on cued recall. Remindings were brought under task control to evaluate their effects. Participants studied 2 lists of word pairs containing 3 item types: single items that appeared once in List 2, within-list repetitions that appeared twice in List 2, and between-list repetitions that appeared once in List 1 and once in List 2. Our primary interest was in performance on between-list repetitions. Detection of between-list repetitions was encouraged in an n-back condition by instructing participants to indicate when a presented item was a repetition of any preceding item, including items presented in List 1. In contrast, detection of between-list repetitions was discouraged in a within-list back condition by instructing participants only to indicate repetitions occurring in List 2. Cued recall of between-list repetitions was enhanced when instructions encouraged detection of List 1 presentations. These results accord with those from prior experiments showing a role of study-phase retrieval in effects of spacing repetitions. Past experiments have relied on conditionalized data to draw conclusions, producing the possibility that performance benefits merely reflected effects of item selection. By bringing effects under task control, we avoided that problem. Our results provide evidence that reminding resulting from retrieval of earlier presentations plays a role in the effects of spaced repetitions on cued recall. However, our results also reveal that such retrievals are not necessary to produce an effect of spacing repetitions.

  8. BRBN-T validation: adaptation of the Selective Reminding Test and Word List Generation

    Directory of Open Access Journals (Sweden)

    Mariana Rigueiro Neves

    2015-10-01

    Full Text Available Objective This study aims to present the Selective Reminding Test(SRT and Word List Generation (WLG adaptation to the Portuguese population, within the validation of the Brief Repeatable Battery of Neuropsychological Tests (BRBN-Tfor multiple sclerosis (MS patients.Method 66 healthy participants (54.5% female recruited from the community volunteered to participate in this study.Results A combination of procedures from Classical Test Theory (CTT and Item Response Theory (ITR were applied to item analysis and selection. For each SRT list, 12 words were selected and 3 letters were chosen for WLG to constitute the final versions of these tests for the Portuguese population.Conclusion The combination of CTT and ITR maximized the decision making process in the adaptation of the SRT and WLG to a different culture and language (Portuguese. The relevance of this study lies on the production of reliable standardized neuropsychological tests, so that they can be used to facilitate a more rigorous monitoring of the evolution of MS, as well as any therapeutic effects and cognitive rehabilitation.

  9. Accident: Reminder

    CERN Document Server

    2003-01-01

    There is no left turn to Point 1 from the customs, direction CERN. A terrible accident happened last week on the Route de Meyrin just outside Entrance B because traffic regulations were not respected. You are reminded that when travelling from the customs, direction CERN, turning left to Point 1 is forbidden. Access to Point 1 from the customs is only via entering CERN, going down to the roundabout and coming back up to the traffic lights at Entrance B

  10. Reminding-Based Learning

    Science.gov (United States)

    1994-02-08

    categorization. 1b. Interactions among different m csea . The work on selectivity can be viewed in a slightly different way - the generlizatim depends upon...paper on this accepted in Journal of Experimental Psychology: Learning, Memory, and Cognition (Spalding & Ross, in press) and have presented this work at...the separation of similarity effects. Journal of Expcimentygholog. Leming. Mm=. and Cogntion, 13, 629- 639. Ross, B. H. (1989a). Remindings in learning

  11. Taxing working memory during retrieval of emotional memories does not reduce memory accessibility when cued with reminders

    Directory of Open Access Journals (Sweden)

    Kevin eVan Schie

    2015-02-01

    Full Text Available Earlier studies have shown that when individuals recall an emotional memory while simultaneously doing a demanding dual-task (e.g., playing Tetris, mental arithmetic, making eye movements, this reduces self-reported vividness and emotionality of the memory. These effects have been found up to one week later, but have largely been confined to self-report ratings. This study examined whether this dual-tasking intervention reduces memory performance (i.e., accessibility of emotional memories. Undergraduates (N = 60 studied word-image pairs and rated the retrieved image on vividness and emotionality when cued with the word. Then they viewed the cues and recalled the images with or without making eye movements. Finally, they re-rated the images on vividness and emotionality. Additionally, fragments from images from all conditions were presented and participants identified which fragment was paired earlier with which cue. Findings showed no effect of the dual-task manipulation on self-reported ratings and latency responses. Cued recall may not have been sufficient to elicit specific and continuous target retrieval for memory blurring to occur. The study demonstrates boundaries to the effects of the dual-tasking procedure.

  12. Seat belt reminders.

    NARCIS (Netherlands)

    2008-01-01

    Seat belts are an effective way of reducing the number or road deaths and severe road injuries in crashes. Seat belt reminders warn car drivers and passengers if the seat belt is not fastened. This can be done by a visual signal or an acoustic signal or by a combination of the two. Seat belt reminde

  13. REMINDER FROM MEDICAL SERVICE

    CERN Multimedia

    Medical Service

    2001-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites, be they staff or from outside firms, that they are welcome at the Infirmary, building 57, ground floor. For information, call the Nurses on Telephone: 73802. by electronic mail: Infirmary.Service@cern.ch Marion.Diedrich@cern.ch Janet.Doody@cern.ch Mireille.Vosdey@cern.ch

  14. REMINDER FROM MEDICAL SERVICE

    CERN Multimedia

    Service Médical

    2000-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites, be they staff or from outside firms, that they are welcome at the Infirmary, building 57, ground floor. For information, call the Nurses on Telephone: 73802. by electronic mail: Infirmary.Service@cern.ch Marion.Diedrich@cern.ch Janet.Doody@cern.ch Mireille.Vosdey@cern.ch

  15. REMINDER FROM MEDICAL SERVICE

    CERN Multimedia

    Medical Service

    2001-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites, be they staff or from outside firms, that they are welcome at the Infirmary, building 57, ground floor. For information, call the Nurses on Telephone: 73802. by electronic mail: Infirmary.Service@cern.ch Marion.Diedrich@cern.ch Janet.Doody@cern.ch Mireille.Vosdey@cern.ch

  16. REMINDER FROM MEDICAL SERVICE

    CERN Multimedia

    Service Médical

    2000-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites, be they staff or from outside firms, that they are welcome at the Infirmary, building 57, ground floor.For information, call the Nurses- on Telephone73802- by electronic mailInfirmary.Service@cern.chMarion.Diedrich@cern.chJanet.Doody@cern.chMireille.Vosdey@cern.chMedical Service

  17. REMINDER FROM MEDICAL SERVICE

    CERN Multimedia

    Medical Service

    2001-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites, be they staff or from outside firms, that they are welcome at the Infirmary, building 57, ground floor. For information, call the Nurses on telephone: 73802. by electronic mail: Infirmary.Service@cern.ch Marion.Diedrich@cern.ch Janet.Doody@cern.ch Mireille.Vosdey@cern.ch

  18. REMINDER FROM MEDIAL SERVICE

    CERN Multimedia

    Service médical

    2000-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites, be they staff or from outside firms, that they are welcome at the Infirmary, building 57, ground floor. For information, call the Nurses - on Telephone: 73802. - by electronic mail: Infirmary.Service@cern.ch Marion.Diedrich@cern.ch Janet.Doody@cern.ch Mireille.Vosdey@cern.ch

  19. CuO-PANI nanostructure with tunable spectral selectivity for solar selective coating application

    Energy Technology Data Exchange (ETDEWEB)

    Cindrella, L., E-mail: cind@nitt.edu; Prabhu, S., E-mail: sprabhuk@gmail.com

    2016-08-15

    Highlights: • CuO-PANI nanostructure has been reported as the solar selective absorber coating. • Solar selectivity and efficiency of the coatings have been evaluated. • PANI provides a surface texture favourable for multiple reflection. - Abstract: CuO-PANI nanostructure has been demonstrated as the solar selective absorber coating for the first time. The effortless chemical methods and easily scalable techniques such as precipitation, in-situ polymerization and spray coating were adopted for the fabrication of CuO nanorods and CuO-PANI nanostructures for solar application. The synthesis was carried out without using any template. The morphology and phase structure of fabricated CuO nanorods and CuO-PANI nanostructure coatings were studied by atomic force microscopy, scanning electron microscopy and X-ray diffraction analysis. The energy dispersive X-ray spectra and elemental mapping confirm the presence of the chosen elements in the nanostructure. The solar absorptance (α{sub s}), thermal emittance (ε{sub t}) and selectivity (ξ) of the nanostructure coatings on glass substrate were optimized to 0.94, 0.01 and 94 respectively by changing the polyaniline content on the surface of the CuO nanorods. The efficiency of the solar selective coatings were evaluated. The optimized solar absorber coating of CuO-PANI nanostructure is highly promising for its selective optical properties.

  20. REMINDER FROM MEDICAL SERVICE

    CERN Multimedia

    2003-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites, staff members or from outside firms, that they are welcome at the Infirmary, building 57, ground floor. For information, call the nurses - on telephone: 73802 - by e-mail: Service.Médical@cern.ch Francoise.Lebrun-Klauser@cern.ch Mireille.Vosdey@cern.ch Katie.Warrillow-Thomson@cern.ch Medical Service

  1. REMINDER FROM MEDICAL SERVICE

    CERN Multimedia

    Medical Service

    2002-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites, staff members or from outside firms, that they are welcome at the Infirmary, building 57, ground floor. For information, call the nurses: on telephone: 73802 by e-mail: Service.Medical@cern.ch Francoise.Lebrun-Klauser@cern.ch Mireille.Vosdey@cern.ch Katie.Warrillow-Thomson@cern.ch Medical Service

  2. REMINDER FROM MEDICAL SERVICE

    CERN Multimedia

    Medical Service

    2001-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites, be they staff or from outside firms, that they are welcome at the Infirmary, building 57, ground floor. For information, call the Nurses on Telephone: 73802 by electronic mail: Infirmary.Service@cern.ch Marion.Diedrich@cern.ch Janet.Doody@cern.ch Mireille.Vosdey@cern.ch  

  3. Reminder from Medical Service

    CERN Multimedia

    Medical Service

    2004-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites, staff members or from outside firms, that they are welcome at the Infirmary, building 57, ground floor. For information, call the nurses on telephone: 73802 by e-mail: Service.Medical@cern.ch Francoise.Lebrun-Klauser@cern.ch Mireille.Vosdey@cern.ch Katie.Warrillow-Thomson@cern.ch Medical Service

  4. REMINDER FROM MEDICAL SERVICE

    CERN Multimedia

    2003-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites, staff members or from outside firms, that they are welcome at the Infirmary, building 57, ground floor. For information, call the nurses - on telephone: 73802 - by e-mail: Service.Médical@cern.ch Francoise.Lebrun-Klauser@cern.ch Mireille.Vosdey@cern.ch Katie.Warrillow-Thomson@cern.ch Medical Service

  5. REMINDER FROM MEDICAL SERVICE

    CERN Multimedia

    Medical Service

    2000-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites, be they staff or from outside firms, that they are welcome at the Infirmary, building 57, ground floor.For information, call the Nurses on Telephone: 73802 or by electronic mail:Infirmary.Service@cern.chMarion.Diedrich@cern.ch Janet.Doody@cern.ch Mireille.Vosdey@cern.chMedicalService

  6. Reminder from Medical Service

    CERN Multimedia

    2003-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites, staff members or from outside firms, that they are welcome at the Infirmary, building 57, ground floor. For information, contact the nurses on telephone: 73802 by e-mail: Service.Médical@cern.ch Francoise.Lebrun-Klauser@cern.ch Mireille.Vosdey@cern.ch Katie.Warrillow-Thomson@cern.ch Medical Service

  7. REMINDER FROM MEDICAL SERVICE

    CERN Multimedia

    2003-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites, staff members or from outside firms, that they are welcome at the Infirmary, building 57, ground floor. For information, call the nurses - on telephone: 73802 - by e-mail:Service.Médical@cern.ch Francoise.Lebrun-Klauser@cern.ch Mireille.Vosdey@cern.ch Katie.Warrillow-Thomson@cern.ch Medical Service

  8. REMINDER FROM MEDICAL SERVICE

    CERN Multimedia

    Service Médical

    2000-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites, be they staff or from outside firms, that they are welcome at the Infirmary, building 57, ground floor. For information, call the Nurses on telephone: 73802. by electronic mail to: Infirmary.Service@cern.chMarion.Diedrich@cern.ch Janet.Doody@cern.ch Mireille.Vosdey@cern.ch Medical Service

  9. REMINDER FROM MEDICAL SERVICE

    CERN Multimedia

    Service médical

    2000-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites,be they staff or from outside firms, that they are welcome at the Infirmary, building 57, ground floor.For information, call the Nurseson telephone: 73802.by electronic mail to:Infirmary.Service@cern.chMarion.Diedrich@cern.ch Janet.Doody@cern.ch Mireille.Vosdey@cern.chMedicalService

  10. REMINDER FROM MEDICAL SERVICE

    CERN Multimedia

    Service Médical

    2000-01-01

    iFor medical problems, we would like to remind all personnel working on the CERN sites, be they staff or from outside firms, that they are welcome at the Infirmary, building 57, ground floor. For information, call the Nurses on Telephone: 73802. by electronic mail: Infirmary.Service@cern.ch Marion.Diedrich@cern.ch Janet.Doody@cern.ch Mireille.Vosdey@cern.ch

  11. Response of the Cu(II) ion selective electrode to Cu titration in artificial and natural shore seawater and in the measurement of the Cu complexation capacity.

    Science.gov (United States)

    Rivera-Duarte, Ignacio; Zirino, Alberto

    2004-06-01

    The Orion 94-29 Cu(II) jalpaite ion selective electrode (Cu-ISE) was used to measure both the concentration of the aqueous free Cu(II) ion ([Cu(II)aq]) and its changes due to additions of Cu, in artificial seawater (ASW) and in seawater from San Diego Bay, CA. The range of free copper ion (i.e., pCu, -log [Cu(II)aq]) determined in seawater samples from the San Diego Bay area (11.3-12.6, 11.9 +/- 0.4, average +/- SD) is consistent with that previously reported for estuarine and coastal areas (10.9-14.1). The changes in [Cu(II)aq] as a result of the additions of Cu were used to determine the Cu complexation capacity (Cu-CC), which has a measured range (2.7 x 10(-8)-2.0 x 10(-7) M; 7.6 x 10(-8) +/- 4.8 x 10(-8) M) comparable to the range of values previously reported for estuarine and coastal zones (i.e., L1+L2, 1.1 x 10(-8)-2.0 x 10(-7) M). The narrow range of pCu at the Cu-CC (pCuCu-CC, 11.1-11.9, 11.5 +/- 0.2) indicates the predominant role of the Cu-CC in regulating the concentration of ambient Cu(II)aq to a level < or =1 x 10(-11) M Cu(II)aq. These results attest to the capability of the Cu-ISE to measure pCu and Cu-CC in aquatic coastal environments with relatively high total Cu concentrations and organic loads, such as those from heavily used coasts and bays.

  12. Used batteries - REMINDER

    CERN Document Server

    2006-01-01

    With colder weather drawing in, it is quite likely that older car batteries will fail. On this subject, the Safety Commission wishes to remind everyone that CERN is not responsible for the disposal of used batteries from private vehicles. So please refrain from abandoning them on pavements or around or inside buildings. Used batteries can be disposed of safely, free-of-charge and without any damage to the environment at waste disposal sites (déchetteries) close to CERN in both France (Ain and Haute-Savoie) and in the Canton of Geneva in Switzerland (Cheneviers). Since the average car battery lasts a number of years, this only represents a small effort on your part over the whole lifetime of your vehicle. Most people don't need reminding that car batteries contain concentrated sulphuric acid, which can cause severe burns. Despite this, we frequently find them casually dumped in scrap metal bins! For more information, please contact R. Magnier/SC-GS 160879 We all have a responsibility for safety and th...

  13. Informing, reminding, nagging

    Science.gov (United States)

    Ehlert, Iris

    2016-04-01

    I want to discuss the challenges I am facing by running the Contact Point for Copernicus National Marine Services in Germany, a project that aims to improve the integration of the marine sector of the European Copernicus program by serving as an interface between German users and European Copernicus institutions and activities. To establish a national user network covering public users, industry, research institutions and governmental entities, an indispensable necessity is to understand the different user-group requirements and interests. Hence, key actions are both to conduct own research, i.e., to work with, e.g., Sentinel and in-situ data, and to offer a platform like user workshops on a regular basis to discuss new product developments and user requirements. Through the close cooperation with the German Fachkoordinator for the Monitoring of the Marine Environment, the outcomes of those workshops, and the results of additional, independent user surveys, are transferred directly to national and European policy makers. However, to find the right balance between informing or reminding users on the one hand, and nagging them on the other hand, is challenging. A solution could be the right combination of newsletters, general information on a website, and user workshops and surveys. And how this "right combination" should look like, I would like to discuss with the audience in this session.

  14. Fabrication of 10 μm-scale conductive Cu patterns by selective laser sintering of Cu complex ink

    Science.gov (United States)

    Min, Hyungsuk; Lee, Byoungyoon; Jeong, Sooncheol; Lee, Myeongkyu

    2017-02-01

    A Cu complex ink was synthesized using copper formate as a precursor and its potential for laser patterning was investigated. The Cu ink was spin-coated onto a substrate and the coated film was space-selectively sintered using a nanosecond-pulsed ultraviolet laser. The unexposed Cu ink could be removed from the film by rinsing it with the dispersing agent used to synthesize the ink, disclosing a conductive Cu pattern. A minimum resistivity of 8.46×10-5 Ω cm was obtained for the Cu lines with 10-20 μm widths. The feasibility of this method for metallization was demonstrated by fabricating a complex Cu electric circuit on an indium tin oxide-coated glass substrate. The selective laser sintering approach provides a simple, cost-effective alternative to conventional lithography for the production of electrode or metallization patterns.

  15. Understanding ammonia selective catalytic reduction kinetics over Cu-SSZ-13 from motion of the Cu ions

    Energy Technology Data Exchange (ETDEWEB)

    Gao, Feng; Walter, Eric D.; Kollar, Marton; Wang, Yilin; Szanyi, Janos; Peden, Charles HF

    2014-11-01

    Cu-SSZ-13 catalysts with three Si/Al ratios, at 6, 12 and 35, are synthesized with solution ion exchange. Catalysts are characterized with surface area/pore volume measurements, temperature programmed reduction (TPR), and electron paramagnetic resonance (EPR) spectroscopy. Catalytic properties are examined using NO oxidation, ammonia oxidation, and standard ammonia selective catalytic reduction (NH3-SCR) reactions. By varying Si/Al ratios and Cu loadings, it is possible to synthesize catalysts with one dominant type of isolated Cu2+ ion species. Prior to full dehydration of the zeolite catalyst, hydrated Cu2+ ions are found to be very mobile as judged from EPR. NO oxidation is catalyzed by O-bridged Cu-dimer species that form at relatively high Cu loadings and in the presence of O2. For NH3 oxidation and standard SCR reactions, transient Cu-dimers even form at much lower Cu loadings; and these are proposed to be the active sites for reaction temperatures ≤ 350 °C. These dimer species can be viewed as in equilibrium with monomeric Cu ion complexes. Between ~250 and 350 °C, these moieties become less stable causing SCR reaction rates to decrease. At temperatures above 350 °C and at low Cu loadings, Cu-dimers completely dissociate to regenerate isolated Cu2+ monomers that then locate at ion-exchange sites of the zeolite lattice. At low Cu loadings, these Cu species are the high-temperature active SCR catalytic centers. At high Cu loadings, on the other hand, both Cu-dimers and monomers are highly active in the high temperature kinetic regime, yet Cu-dimers are less selective in SCR. Brönsted acidity is also very important for SCR reactivity in the high-temperature regime. The authors gratefully acknowledge the US Department of Energy (DOE), Energy Efficiency and Renewable Energy, Vehicle Technologies Office for the support of this work. The research described in this paper was performed at the Environmental Molecular Sciences Laboratory (EMSL), a national

  16. Excellent activity and selectivity of Cu-SSZ-13 in the selective catalytic reduction of NOx with NH3

    Energy Technology Data Exchange (ETDEWEB)

    Kwak, Ja Hun; Tonkyn, Russell G.; Kim, Do Heui; Szanyi, Janos; Peden, Charles HF

    2010-10-21

    Superior activity and selectivity of a Cu ion-exchanged SSZ-13 zeolite in the selective catalytic reduction (SCR) of NOx with NH3 were observed, in comparison to Cu-beta and Cu-ZSM-5 zeolites. Cu-SSZ-13 was not only more active in the NOx SCR reaction over the entire temperature range studied (up to 550 °C), but also more selective toward nitrogen formation, resulting in significantly lower amounts of NOx by-products (i.e., NO2 and N2O) than the other two zeolites. In addition, Cu-SSZ-13 demonstrated the highest activity and N2 formation selectivity in the oxidation of NH3. The results of this study strongly suggest that Cu-SSZ-13 is a promising candidate as a catalyst for NOx SCR with great potential in after-treatment systems for either mobile or stationary sources.

  17. Isolated Cu2+ ions: active sites for selective catalytic reduction of NO

    NARCIS (Netherlands)

    Korhonen, S.T.; Fickel, D.W.; Lobo, R.F.; Weckhuysen, B.M.; Beale, A.M.

    2011-01-01

    Cu chabazite catalysts show remarkable low temperature activity in selective catalytic reduction (SCR) of NO. This high activity is due to the unique character of the zeolite framework that allows only the presence of one type of isolated mononuclear Cu2+ species. These Cu2+ species are the active s

  18. Preparation of solar selective absorbing CuO coating for medium temperature application

    Institute of Scientific and Technical Information of China (English)

    HUANG Qunwu; WANG Yiping; LI Jinhua

    2007-01-01

    A new method of preparing CuO solar selective absorbing coating for medium temperature is presented.After pretreatment,brass was overlaid with CuO by chemical plating.The effects of reactant concentration,reaction temperature and reaction time on the absorptivity of CuO coating were investigated.The optimized condition of preparing CuO coating was obtained.The CuO coating was analyzed with X-ray photoelectron spectroscopy(XPS) and scanning electron microscopy(SEM).In order to prolong the period of use,the CuO coating was protected by TiO2.The experiment shows that the TiO2/CuO coating is more heat-resistant,acid-resistant,and wear resistant than CuO coating,without Iosing absorptivity markedly.The TiO2 coating can reduce emissivity and protect the CuO coating.

  19. Alkali resistivity of Cu based selective catalytic reduction catalysts

    DEFF Research Database (Denmark)

    Putluru, Siva Sankar Reddy; Jensen, Anker Degn; Riisager, Anders;

    2012-01-01

    The deactivation of V2O5–WO3–TiO2, Cu–HZSM5 and Cu–HMOR plate type monolithic catalysts was investigated when exposed to KCl aerosols in a bench-scale reactor. Fresh and exposed catalysts were characterized by selective catalytic reduction (SCR) activity measurements, scanning electron microscope...... catalysts revealed that the potassium salt not only deposited on the catalyst surface, but also penetrated into the catalyst wall. Thus, the K/M ratio (M = V or Cu) was high on V2O5–WO3–TiO2 catalyst and comparatively less on Cu–HZSM5 and Cu–HMOR catalysts. NH3-TPD revealed that the KCl exposed Cu–HZSM5...

  20. REMINDER FROM THE MEDICAL SERVICE

    CERN Multimedia

    Medical Service

    2000-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites, be they staff or from outside firms, that they are welcome at the Infirmary, building 57, ground floor. For information, call the Nurses on Telephone: 73802 by electronic mail: Infirmary.Service@cern.ch Marion.Diedrich@cern.ch Janet.Doody@cern.ch Mireille.Vosdey@cern.ch

  1. Selective Catalytic Reduction over Cu/SSZ-13: Linking Homo- and Heterogeneous Catalysis.

    Science.gov (United States)

    Gao, Feng; Mei, Donghai; Wang, Yilin; Szanyi, János; Peden, Charles H F

    2017-03-21

    Active centers in Cu/SSZ-13 selective catalytic reduction (SCR) catalysts have been recently identified as isolated Cu(2+) and [Cu(II)(OH)](+) ions. A redox reaction mechanism has also been established, where Cu ions cycle between Cu(I) and Cu(II) oxidation states during SCR reaction. While the mechanism for the reduction half-cycle (Cu(II) → Cu(I)) is reasonably well-understood, that for the oxidation half-cycle (Cu(I) → Cu(II)) remains an unsettled debate. Herein we report detailed reaction kinetics on low-temperature standard NH3-SCR, supplemented by DFT calculations, as strong evidence that the low-temperature oxidation half-cycle occurs with the participation of two isolated Cu(I) ions via formation of a transient [Cu(I)(NH3)2](+)-O2-[Cu(I)(NH3)2](+) intermediate. The feasibility of this reaction mechanism is confirmed from DFT calculations, and the simulated energy barrier and rate constants are consistent with experimental findings. Significantly, the low-temperature standard SCR mechanism proposed here provides full consistency with low-temperature SCR kinetics.

  2. The Effect of Composition of Different Ecotoxicological Test Media on Free and Bioavailable Copper from CuSO4 and CuO Nanoparticles: Comparative Evidence from a Cu-Selective Electrode and a Cu-Biosensor

    Directory of Open Access Journals (Sweden)

    Angela Ivask

    2011-11-01

    Full Text Available The analysis of (bioavailable copper in complex environmental settings, including biological test media, is a challenging task. In this study, we demonstrated the potential of a recombinant Pseudomonas fluorescens-based biosensor for bioavailability analysis of CuSO4 and CuO nanoparticles (nano-CuO in seventeen different ecotoxicological and microbiologial test media. In parallel, free Cu in these test media was analysed using Cu-ion selective electrode (Cu-ISE. In the case of CuSO4, both free and bioavailable Cu decreased greatly with increasing concentration of organics and phosphates in the tested media. A good correlation between free and bioavailable Cu was observed (r = 0.854, p < 0.01 indicating that the free Cu content in biological test media may be a reasonably good predictor for the toxicity of CuSO4. As a proof, it was demonstrated that when eleven EC50 values for CuSO4 from different organisms in different test media were normalized for the free Cu in these media, the difference in these EC50 values was decreased from 4 to 1.8 orders of magnitude. Thus, toxicity of CuSO4 to these organisms was attributed to the properties of the test media rather than to inherent differences in sensitivity between the test organisms. Differently from CuSO4, the amount of free and bioavailable Cu in nano-CuO spiked media was not significantly correlated with the concentration of organics in the test media. Thus, the speciation of nano-CuO in toxicological test systems was not only determined by the complexation of Cu ions but also by differential dissolution of nano-CuO in different test conditions leading to a new speciation equilibrium. In addition, a substantial fraction of nano-CuO that was not detectable by Cu-ISE (i.e., not present as free Cu-ions was bioavailable to Cu-biosensor bacteria. Thus, in environmental hazard analysis of (nano particulate materials, biosensor analysis may be more informative than other analytical techniques. Our

  3. A novel selective fluorescent chemosensor for Cu(Ⅱ)

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    A novel fluorescence enhancement Cu2+ chemosensor derived from coumarin was prepared. Emission study found that it exhibits evident Cu2+-amplified fluorescence prior to Co2+, Pb2+, Mg2+, Mn2+, Ni2+, Zn2+, Fe3+, Ag+ and Cd2+, and the largest

  4. Fine CuO anisotropic nanoparticles supported on mesoporous SBA-15 for selective hydrogenation of nitroaromatics.

    Science.gov (United States)

    Sareen, Shweta; Mutreja, Vishal; Singh, Satnam; Pal, Bonamali

    2016-01-01

    SBA-15 modified with APTMS (3-aminopropyl trimethoxysilane) having pore diameter (∼8 nm) has been synthesized and impregnated with 1-10 wt.% Cu using Cu(NO3)2 as a metal source followed by calcination at 350 °C. As-prepared CuO/ap-SBA-15 powder showed changes in the color from white for bare SBA-15 to light green due to formation of anisotropic CuO nanoparticles that exhibited a characteristic plasmon absorption band at 359 and 747 nm. TEM studies showed a change in the morphology of CuO NPs as a function of increased Cu loading. Moreover, well dispersed CuO nanospheres (∼5-6 nm) and nanorods (aspect ratio ∼11-20 nm) having monoclinic crystal phase were observed within the mesoporous channels of SBA-15. Elemental mapping studies confirmed uniform distribution of CuO nanoparticles on the surface of SBA-15. An increase in surface area was also observed from 694 m(2) g(-1) for SBA-15 to 762 m(2) g(-1) for 10 wt.% Cu loading probably due to the deposition of excess of CuO nanoparticles on the outer siliceous surface. The catalytic activity also increased with Cu loading and 10 wt.% CuO/ap-SBA-15 catalyst displayed the highest catalytic activity for the reduction of m-chloronitrobenzene and m-nitrotoluene with 83% and 100% selectivity for m-chloroaniline and m-aminotoluene respectively.

  5. Reminder from the Medical Service

    CERN Multimedia

    2003-01-01

    For medical problems, we would like to remind all personnel working on the CERN sites, staff members or from outside firms, that they are welcome at the Infirmary, building 57, ground floor. For information, call the nurses - on telephone: 73802 - by e-mail: Service.Médical@cern.ch Francoise.Lebrun-Klauser@cern.ch Mireille.Vosdey@cern.ch Katie.Warrillow-Thomson@cern.ch Medical Service

  6. Cu-Sn Bimetallic Catalyst for Selective Aqueous Electroreduction of CO2 to CO

    KAUST Repository

    Sarfraz, Saad

    2016-03-23

    We report a selective and stable electrocatalyst utilizing non-noble metals consisting of Cu and Sn for the efficient and selective reduction of CO2 to CO over a wide potential range. The bimetallic electrode was prepared through the electrodeposition of Sn species on the surface of oxide-derived copper (OD-Cu). The Cu surface, when decorated with an optimal amount of Sn, resulted in a Faradaic efficiency (FE) for CO greater than 90% and a current density of −1.0 mA cm−2 at −0.6 V vs. RHE, compared to the CO FE of 63% and −2.1 mA cm−2 for OD-Cu. Excess Sn on the surface caused H2 evolution with a decreased current density. X-ray diffraction (XRD) suggests the formation of Cu-Sn alloy. Auger electron spectroscopy of the sample surface exhibits zero-valent Cu and Sn after the electrodeposition step. Density functional theory (DFT) calculations show that replacing a single Cu atom with a Sn atom leaves the d-band orbitals mostly unperturbed, signifying no dramatic shifts in the bulk electronic structure. However, the Sn atom discomposes the multi-fold sites on pure Cu, disfavoring the adsorption of H and leaving the adsorption of CO relatively unperturbed. Our catalytic results along with DFT calculations indicate that the presence of Sn on reduced OD-Cu diminishes the hydrogenation capability—i.e., the selectivity towards H2 and HCOOH—while hardly affecting the CO productivity. While the pristine monometallic surfaces (both Cu and Sn) fail to selectively reduce CO2, the Cu-Sn bimetallic electrocatalyst generates a surface that inhibits adsorbed H*, resulting in improved CO FE. This study presents a strategy to provide a low-cost non-noble metals that can be utilized as a highly selective electrocatalyst for the efficient aqueous reduction of CO2.

  7. Spectroscopic evidence for origins of size and support effects on selectivity of Cu nanoparticle dehydrogenation catalysts

    Energy Technology Data Exchange (ETDEWEB)

    Witzke, M. E.; Dietrich, P. J.; Ibrahim, M. Y. S.; Al-Bardan, K.; Triezenberg, M. D.; Flaherty, D. W.

    2016-12-12

    Selective dehydrogenation catalysts that produce acetaldehyde from bio-derived ethanol can increase the efficiency of subsequent processes such as C–C coupling over metal oxides to produce 1-butanol or 1,3-butadiene or oxidation to acetic acid. Here, we use in situ X-ray absorption spectroscopy and steady state kinetics experiments to identify Cuδ+ at the perimeter of supported Cu clusters as the active site for esterification and Cu0 surface sites as sites for dehydrogenation. Correlation of dehydrogenation and esterification selectivities to in situ measures of Cu oxidation states show that this relationship holds for Cu clusters over a wide-range of diameters (2–35 nm) and catalyst supports and reveals that dehydrogenation selectivities may be controlled by manipulating either.

  8. Chemical deactivation of Cu-SSZ-13 ammonia selective catalytic reduction (NH3-SCR) systems

    NARCIS (Netherlands)

    Lezcano-Gonzalez, I.; Deka, U.; van der Bij, H. E.; Paalanen, P.; Arstad, B.; Weckhuysen, B. M.; Beale, A. M.

    2014-01-01

    The chemical deactivation of Cu-SSZ-13 Ammonia Selective Catalytic Reduction (NH3-SCR) catalysts by Pt, Zn, Ca and P has been systematically investigated using a range of analytical techniques in order to study the influence on both the zeolitic framework and the active Cu2+ ions. The results obtain

  9. Selective recovery of Cu, Zn, and Ni from acid mine drainage.

    Science.gov (United States)

    Park, Sang-Min; Yoo, Jong-Chan; Ji, Sang-Woo; Yang, Jung-Seok; Baek, Kitae

    2013-12-01

    In Korea, the heavy metal pollution from about 1,000 abandoned mines has been a serious environmental issue. Especially, the surface waters, groundwaters, and soils around mines have been contaminated by heavy metals originating from acid mine drainage (AMD) and mine tailings. So far, AMD was considered as a waste stream to be treated to prevent environmental pollutions; however, the stream contains mainly Fe and Al and valuable metals such as Ni, Zn, and Cu. In this study, Visual MINTEQ simulation was carried out to investigate the speciation of heavy metals as functions of pH and neutralizing agents. Based on the simulation, selective pH values were determined to form hydroxide or carbonate precipitates of Cu, Zn, and Ni. Experiments based on the simulation results show that the recovery yield of Zn and Cu were 91 and 94 %, respectively, in a binary mixture of Cu and Zn, while 95 % of Cu and 94 % of Ni were recovered in a binary mixture of Cu and Ni. However, the recovery yield and purity of Zn and Ni were very low because of similar characteristics of Zn and Ni. Therefore, the mixture of Cu and Zn or Cu and Ni could be recovered by selective precipitation via pH adjustment; however, it is impossible to recover selectively Zn and Ni in the mixture of them.

  10. Selective catalytic reduction of nitric oxide by ammonia over Cu-exchanged Cuban natural zeolites

    Energy Technology Data Exchange (ETDEWEB)

    Moreno-Tost, Ramon; Santamaria-Gonzalez, Jose; Rodriguez-Castellon, Enrique; Jimenez-Lopez, Antonio [Departamento de Quimica Inorganica, Cristalografia y Mineralogia, Facultad de Ciencias, Unidad Asociada del Instituto de Catalisis y Petroleoquimica, CSIC, Universidad de Malaga, Campus de Teatinos, 29071 Malaga (Spain); Autie, Miguel A.; Glacial, Marisol Carreras [Centro Nacional de Investigaciones Cientificas, Ciudad de la Habana, La Habana (Cuba); Gonzalez, Edel [Instituto Superior Pedagogico ' Enrique Jose Varona' , La Habana (Cuba); Pozas, Carlos De las [Centro de Gerencia de Programas y Proyectos Priorizados, La Habana (Cuba)

    2004-07-15

    The catalytic selective reduction of NO over Cu-exchanged natural zeolites (mordenite (MP) and clinoptilolite (HC)) from Cuba using NH{sub 3} as reducing agent and in the presence of excess oxygen was studied. Cu(II)-exchanged zeolites are very active catalysts, with conversions of NO of 95%, a high selectivity to N{sub 2} at low temperatures, and exhibiting good water tolerance. The chemical state of the Cu(II) in exchanged zeolites was characterized by H{sub 2}-TPR and XPS. Cu(II)-exchanged clinoptilolite underwent a severe deactivation in the presence of SO{sub 2}. However, Cu(II)-exchanged mordenite not only maintained its catalytic activity, but even showed a slight improvement after 20h of reaction in the presence of 100ppm of SO{sub 2}.

  11. Cu and Boron Doped Carbon Nitride for Highly Selective Oxidation of Toluene to Benzaldehyde

    Directory of Open Access Journals (Sweden)

    Hongling Han

    2015-07-01

    Full Text Available A novel Cu and boron doped graphitic carbon nitride catalyst (Cu-CNB was synthesized using cheap precursors and systematically characterized. The selective oxidation of toluene proceeded very smoothly over the catalyst at 70 °C using tert-butyl hydroperoxide (TBHP as the oxidant to exclusively afford benzaldehyde. The catalyst can be used for at least five cycles without decrease in activity and selectivity.

  12. Cu and Boron Doped Carbon Nitride for Highly Selective Oxidation of Toluene to Benzaldehyde.

    Science.gov (United States)

    Han, Hongling; Ding, Guodong; Wu, Tianbin; Yang, Dexin; Jiang, Tao; Han, Buxing

    2015-07-13

    A novel Cu and boron doped graphitic carbon nitride catalyst (Cu-CNB) was synthesized using cheap precursors and systematically characterized. The selective oxidation of toluene proceeded very smoothly over the catalyst at 70 °C using tert-butyl hydroperoxide (TBHP) as the oxidant to exclusively afford benzaldehyde. The catalyst can be used for at least five cycles without decrease in activity and selectivity.

  13. An Amidochlorin-Based Colorimetric Fluorescent Probe for Selective Cu2+ Detection

    Directory of Open Access Journals (Sweden)

    Wenting Li

    2016-01-01

    Full Text Available The design and synthesis of selective and sensitive chemosensors for the quantification of environmentally and biologically important ionic species has attracted widespread attention. Amidochlorin p6 (ACP; an effective colorimetric and fluorescent probe for copper ions (Cu2+ in aqueous solution derived from methyl pheophorbide-a (MPa was designed and synthesized. A remarkable color change from pale yellow to blue was easily observed by the naked eye upon addition of Cu2+; and a fluorescence quenching was also determined. The research of fluorescent quenching of ACP-Cu2+ complexation showed the detection limit was 7.5 × 10−8 mol/L; which suggested that ACP can act as a high sensitive probe for Cu2+ and can be used to quantitatively detect low levels of Cu2+ in aqueous solution. In aqueous solution the probe exhibits excellent selectivity and sensitivity toward Cu2+ ions over other metal ions (M = Zn2+; Ni2+; Ba2+; Ag+; Co2+; Na+; K+; Mg2+; Cd2+; Pb2+; Mn2+; Fe3+; and Ca2+. The obvious change from pale yellow to blue upon the addition of Cu2+ could make it a suitable “naked eye” indicator for Cu2+.

  14. CuO/CeO2 Catalysts for Selective Oxidation of Carbon Monoxide in Excess Hydrogen

    Institute of Scientific and Technical Information of China (English)

    刘春涛; 史鹏飞; 张菊香

    2004-01-01

    CuO/CeO2 catalysts were prepared by a coprecipitation method and tested for CO removal from reformed fuels via selective oxidation. The influence of the calcination temperature on the chemical compositions and catalytic performance of CuO/CeO2 catalysts were studied. It was found that CuO/CeO2 catalysts exhibit excellent CO oxidation activity and selectivity,and the complete removal of CO is attained when the catalysts are calcined at appropriate temperatures. XRD, TPR and XPS results indicate that CuO/CeO2 catalysts exhibit higher catalytic performance in CO selective oxidation due to the strong interaction between copper oxide and cerium dioxide, which promotes the dispersion and hydrogen reduction activity of copper.

  15. Persuasive Reminders for Health Self-Management

    Science.gov (United States)

    O’Leary, Katie; Liu, Leslie; McClure, Jennifer B.; Ralston, James; Pratt, Wanda

    2016-01-01

    Abstract Health reminders are integral to self-managing chronic illness. However, to act on these health reminders, patients face many challenges, such as lack of motivation and ability to perform health tasks. As a result, patients experience negative consequences for their health. To investigate the design of health reminders that persuade patients to take action, we conducted six participatory design sessions with two cohorts: mothers of children with asthma, and older adults with type 2 diabetes. Participants used collages, storyboards, and photos to express design ideas for future health reminder systems. From their design artifacts, we identified four types of persuasive reminders for health self-management: introspective, socially supportive, adaptive, and symbolic. We contribute insights into desired features for persuasive reminder systems from the perspectives of patients and informal caregivers, including features that support users to understand why and how to complete health tasks ahead of time, and affordances for intra-familial and patient-provider collaboration. PMID:28269896

  16. Reminder: Swiss and French cards

    CERN Multimedia

    2012-01-01

    Communication from the HR Department to members of personnel holding an employment or association contract, above 50% and for more than 3 months, with the Organization. The HR Department would like to remind all members of personnel concerned that they are obliged to: • hold a valid Swiss  Légitimation card AND a valid French card (“Titre de séjour spécial” or “attestation de fonctions”) at all times during the exercise of their functions in the Organization; • return these documents as soon as their functions in the Organization cease. Not following these rules could be prejudicial to the Organization and appropriate measures may be taken towards the member of personnel concerned. Information and procedures concerning Swiss and French cards (first application, renewal, theft/loss, etc.) are available in the Admin e-guide. Users and Unpaid Associates must contact the Users Office HR Department Tel.: 729...

  17. Reminder: Mandatory Computer Security Course

    CERN Multimedia

    IT Department

    2011-01-01

    Just like any other organization, CERN is permanently under attack – even right now. Consequently it's important to be vigilant about security risks, protecting CERN's reputation - and your work. The availability, integrity and confidentiality of CERN's computing services and the unhindered operation of its accelerators and experiments come down to the combined efforts of the CERN Security Team and you. In order to remain par with the attack trends, the Security Team regularly reminds CERN users about the computer security risks, and about the rules for using CERN’s computing facilities. Therefore, a new dedicated basic computer security course has been designed informing you about the “Do’s” and “Dont’s” when using CERN's computing facilities. This course is mandatory for all person owning a CERN computer account and must be followed once every three years. Users who have never done the course, or whose course needs to be renewe...

  18. Swiss and French cards - Reminder

    CERN Multimedia

    HR Department

    2011-01-01

    Communication from the HR Department to members of personnel holding an employment or association contract, above 50% and for more than 3 months, with the Organization. The HR Department would like to remind all members of the personnel concerned that they are obliged to: hold a valid Swiss Légitimation card AND a valid French card (“Titre de séjour spécial” or “attestation de fonctions”) at all times during the exercise of their functions in the Organization; return these documents as soon as their functions in the Organization cease. Not following these rules could be prejudicial to the Organization and appropriate measures may be taken with respect to the member of the personnel concerned. Information and procedures concerning Swiss and French cards (first application, renewal, theft/loss, etc.) are available in the Admin e-guide: https://cern.ch/admin-eguide/cartes/proc_cartes_home.asp Users and Unpaid Associates must ...

  19. Nanostructured CuO Thin Films Prepared through Sputtering for Solar Selective Absorbers

    Directory of Open Access Journals (Sweden)

    Senthuran Karthick Kumar

    2013-01-01

    Full Text Available Nanostructured cupric oxide (CuO thin films have been deposited on copper (Cu substrates at different substrate temperatures and oxygen to argon gas ratios through direct current (DC reactive magnetron sputtering. The deposited CuO thin films are characterized by using X-ray diffraction (XRD, scanning electron microscopy (SEM, energy dispersive spectroscopy (EDS, profilometry, and spectrophotometry techniques. The crystalline phases, morphology, optical properties, and photothermal conversion efficiency of the CuO thin films are found to be significantly influenced by the change in substrate temperature and oxygen to argon gas ratio. The variations in the substrate temperature and oxygen to argon gas ratio have induced changes in Cu+ and Cu2+ concentrations of the CuO thin films that result in corresponding changes in their optical properties. The CuO thin film prepared at a substrate temperature of 30°C and O2 to Ar gas ratio of 1 : 1 has exhibited high absorptance and low emittance; thus, it could be used as a solar selective absorber in solar thermal gadgets.

  20. Intelligent seat belt reminders-do they change driver seat belt use in Europe?

    Science.gov (United States)

    Lie, Anders; Krafft, Maria; Kullgren, Anders; Tingvall, Claes

    2008-10-01

    Many modern cars have seat belt reminders (SBRs) using loud and clear sound and light signals. These systems have developed over the last few years. This study investigates how these modern systems influence the seat belt use in real-life traffic in built-up areas in some European cities. The data were collected by field observations in major cities in six European countries and in five cities around Sweden. A selection of car models having seat belt reminders (SBR) were compared to a fleet of similar car models without such reminders. A significant difference in seat belt wearing rate was found in the cars with seat belt reminders. For all observations, the total seat belt wearing rate was 97.5% +/- 0.5% in cars with SBR, while it was 85.8% +/- 0.8% in cars without. There were differences in seat belt use in the different observation locations. The lowest seat belt use was found in Brussels/Belgium with a use rate of 92.6 +/- 2.2% in cars with seat belt reminders and 69.6 +/- 3.1% in cars not fitted with reminders. The highest seat belt use was found in Paris/France where 99.8 +/- 0.4% of the drivers used the seat belt in cars with reminders and 96.9 +/-1.1% were belted in cars without reminders. Seat belt reminders fulfilling Euro NCAP's seat belt reminder protocol are increasing the seat belt use in daily traffic significantly. Around 80% (82.2% +/- 8.6%) of the drivers not putting the belt on without a seat belt reminder do so in cars equipped with an SBR that has a light signal and an associated loud and clear sound signal.

  1. Photocatalytic properties and selective antimicrobial activity of TiO2(Eu)/CuO nanocomposite

    Science.gov (United States)

    Michal, Robert; Dworniczek, Ewa; Caplovicova, Maria; Monfort, Olivier; Lianos, Panagiotis; Caplovic, Lubomir; Plesch, Gustav

    2016-05-01

    TiO2(Eu)/CuO nanocomposites were prepared by precipitation method. The anatase nanocrystallites with a size of 26 nm exhibited well crystallized and characteristical dipyramidal morphology and {1 0 1} and {0 0 1} faceting. Transmission electron microscopy photographs with atomic resolution showed that the Eu(III) dopants were bounded on surface of titania. In the composites, the CuO nanocrystals exhibiting a monoclinic tenorite structure with a size in the range from 2 to 5 nm were grafted to the surface of titania. The influence of copper(II) oxide led to distinct selectivity in the photocatalytic and antimicrobial properties of the investigated TiO2(Eu)/CuO nanocomposites. While the presence of CuO nanocrystals strongly increased the photocatalytic production of hydrogen by ethanol reforming, it decreased the activity in photoinduced total mineralization of phenol comparing with non-modified TiO2(Eu). In investigated TiO2(Eu)/CuO powders, the photoinduced antimicrobial activity against membranes of Enterococcus species was influenced by the selective binding of CuO to the surface of the microorganism leading to distinct selectivity in their action. The activity against Enterococcus faecalis was higher than against Enterococcus faecium.

  2. Selective hydrogenolysis of glycerol to propylene glycol on Cu-ZnO composite catalysts: structural requirements and reaction mechanism.

    Science.gov (United States)

    Wang, Shuai; Zhang, Yichi; Liu, Haichao

    2010-05-03

    Cu-ZnO catalysts were prepared by homogeneous coprecipitation with varying Cu/Zn atomic ratios (0.4-2:1). The catalysts were examined in selective hydrogenolysis of glycerol to propylene glycol. Although propylene glycol selectivities remained essentially constant (over 93%) on the different Cu-ZnO catalysts, the turnover frequencies changed markedly with the Cu/Zn ratio, and reached the greatest value at the ratio of 1:1. Such activity dependence on the Cu/Zn ratio was in parallel with the change in the interaction between Cu and ZnO and in the Cu microstrain, as a consequence of the effects on the crystalline phases of hydroxycarbonate precursors for the Cu-ZnO catalysts, reflecting the structural requirements for glycerol hydrogenolysis. The hydrogenolysis mechanism was also examined and apparently involves kinetically relevant glycerol dehydrogenation to glyceraldehyde on Cu-ZnO and subsequent glyceraldehyde dehydration and hydrogenation to propylene glycol. The mechanism is consistent with the observed superior activities of the more strained Cu particles, and the higher propylene glycol selectivities obtained at higher glycerol and hydrogen concentrations. These findings provide a rationale for the design of more effective Cu-based catalysts in selective hydrogenolysis of glycerol and other biomass-derived polyols, for example, by synthesis of highly strained Cu particles strongly interacting with ZnO or other oxide supports.

  3. Violent media exposure, aggression and CU traits in adolescence: Testing the selection and socialization hypotheses.

    Science.gov (United States)

    Rydell, Ann-Margret

    2016-10-01

    We investigated the role of exposure to violent action for later aggression and for later callous-unemotional traits in a sample of Swedish adolescents (N = 77-85), testing the selection and socialization hypotheses. Adolescents reported on violent delinquency and on callous-unemotional (CU) traits at age 15, on their media habits at age 16 and on reactive and proactive aggression and CU traits at age 18. The socialization hypothesis was supported with regard to aggression, that is, violent delinquency did not affect consumption of violent action, but controlling for violent delinquency, consumption of violent action added to proactive aggression and, marginally, to reactive aggression. The selection hypothesis was supported with regard to CU traits, that is, high levels of CU traits predicted frequent consumption of violent action, but consumption of violent action did not affect later levels of CU traits. Frequent violent media use was associated with later aggression. The associations between CU traits and violent media need further study.

  4. Re-Minding the Dutch

    Directory of Open Access Journals (Sweden)

    H. Pols

    2009-01-01

    Full Text Available Re-Minding the DutchVerward van Geest is commended because of its careful, balanced, detailed, meticulously researched, and comprehensive approach of the development of the psychiatric profession in the Netherlands. The authors relate Dutch developments to initiatives abroad, some of which were taken up by Dutch psychiatrists and developed further. The development of the extensive network of out-patient mental health facilities in particular, which makes the Dutch system stand apart from that of most others, receives a lot of attention. Unfortunately, the history of psychiatry in the former Dutch colonial empire is not covered. The study is applauded for providing a wealth of material that could give a new impulse to discussions about the nature of mental health in the Netherlands, such as the following: How are supply and demand in mental health care related to each other? Do individuals with a lower socio-economic status have adequate access to care? How did the relationship between biological, social, and psychological approaches to mental illness and individual distress change over time?

  5. REMINDER: Saved Leave Scheme (SLS)

    CERN Multimedia

    2003-01-01

    Transfer of leave to saved leave accounts Under the provisions of the voluntary saved leave scheme (SLS), a maximum total of 10 days'* annual and compensatory leave (excluding saved leave accumulated in accordance with the provisions of Administrative Circular No 22B) can be transferred to the saved leave account at the end of the leave year (30 September). We remind you that unused leave of all those taking part in the saved leave scheme at the closure of the leave year accounts is transferred automatically to the saved leave account on that date. Therefore, staff members have no administrative steps to take. In addition, the transfer, which eliminates the risk of omitting to request leave transfers and rules out calculation errors in transfer requests, will be clearly shown in the list of leave transactions that can be consulted in EDH from October 2003 onwards. Furthermore, this automatic leave transfer optimizes staff members' chances of benefiting from a saved leave bonus provided that they ar...

  6. First-aid boxes - Reminder

    CERN Multimedia

    GS Department

    2010-01-01

    With a view to ensuring optimum use of the first-aid boxes on the CERN site, we should like to remind you of various changes introduced in March 2009: The TSO of the buildings concerned is responsible for the first-aid boxes, including checking their contents.   First-aid boxes may be restocked ONLY at the CERN stores (SCEM No. 54.99.80). This is no longer possible at the Infirmary. The associated cost is charged to the Departments.   First-aid boxes should be used only for mild injuries. All other cases should be referred to the Medical Service Infirmary (Bldg. 57 – ground-floor, tel. 73802) between 8.00 a.m. and 5.30 p.m. or to the Fire and Rescue Service (tel. 74444). N.B.: This information does not apply to the red emergency first-aid boxes in the underground areas or to the emergency kits for use in the event of being splashed with hydrofluoric acid.

  7. Impact of Reminders on Children’s Cognitive Flexibility, Intrinsic Motivation, and Mood Depends on Who Provides the Reminders

    OpenAIRE

    Li eQu; Jing Yi Ong

    2016-01-01

    Reminding children to think about alternatives is a strategy adults often use to promote children’s cognitive flexibility, as well as children’s engagement in and enjoyment of the task. The current study investigated whether the impacts of reminders on kindergarten children’s cognitive flexibility, intrinsic motivation, and mood are moderated by who provides the reminders. Eighty-three healthy 5-year-old kindergarten children were randomly assigned to 2 (Reminder: no reminders vs. Reminders) ...

  8. A highly Selective Fluorescent Sensor for Monitoring Cu(2+) Ion: Synthesis, Characterization and Photophysical Properties.

    Science.gov (United States)

    Aderinto, Stephen Opeyemi; Xu, Yuling; Peng, Hongping; Wang, Fei; Wu, Huilu; Fan, Xuyang

    2017-01-01

    A new fluorescent sensor, 4-allylamine-N-(N-salicylidene)-1,8-naphthalimide (1), anchoring a naphthalimide moiety as fluorophore and a Schiff base group as receptor, was synthesized and characterized. The photophysical properties of sensor 1 were conducted in organic solvents of different polarities. Our study revealed that, depending on the solvent polarity, the fluorescence quantum yields varied from 0.59 to 0.89. The fluorescent activity of the sensor was monitored and the sensor was consequently applied for the detection of Cu(2+) with high selectivity over various metal ions by fluorescence quenching in Tris-HCl (pH = 7.2) buffer/DMF (1:1, v/v) solution. From the binding stoichiometry, it was indicated that a 1:1 complex was formed between Cu(2+) and the sensor 1. The fluorescence intensity was linear with Cu(2+) in the concentration range 0.5-5 μM. Moreso, the detection limit was calculated to be 0.32 μM, which is sufficiently low for good sensitivity of Cu(2+) ion. The binding mode was due to the intramolecular charge transfer (ICT) and the coordination of Cu(2+) with C = N and hydroxyl oxygen groups of the sensor 1. The sensor proved effective for Cu(2+) monitoring in real water samples with recovery rates of 95-112.6 % obtained.

  9. Separation of Arsenic from the Antimony-Bearing Dust through Selective Oxidation Using CuO

    Science.gov (United States)

    Zhong, Da-Peng; Li, Lei; Tan, Cheng

    2017-04-01

    A pyrometallurgical process of selective oxidation roasting of the antimony-bearing dust using CuO is put forward, in which the antimony component is oxidized to Sb2O4 staying in the roasted residue, and arsenic is volatilized in the form of As2O3. The addition of CuO has an active effect on the arsenic volatilization, because structures of some complicated As-Sb phases in the dust are destroyed after the "Sb" component in them is oxidized to Sb2O4, and this part of arsenic might be transformed to As2O3, which continues to volatilize. However, the arsenic volatilization rate decreases with the CuO amount in a certain range, which is attributed to the greater formation of Cu3 (AsO4)2 and Cu3As. Under the conditions of roasting temperature of 673 K (400 °C), roasting time of 100 minutes, CuO amount of 34.54 mass pct, and N2 flow rate of 30 mL/min, 91.50 pct arsenic and only 8.63 pct antimony go into the smoke.

  10. Separation of Arsenic from the Antimony-Bearing Dust through Selective Oxidation Using CuO

    Science.gov (United States)

    Zhong, Da-Peng; Li, Lei; Tan, Cheng

    2017-01-01

    A pyrometallurgical process of selective oxidation roasting of the antimony-bearing dust using CuO is put forward, in which the antimony component is oxidized to Sb2O4 staying in the roasted residue, and arsenic is volatilized in the form of As2O3. The addition of CuO has an active effect on the arsenic volatilization, because structures of some complicated As-Sb phases in the dust are destroyed after the "Sb" component in them is oxidized to Sb2O4, and this part of arsenic might be transformed to As2O3, which continues to volatilize. However, the arsenic volatilization rate decreases with the CuO amount in a certain range, which is attributed to the greater formation of Cu3 (AsO4)2 and Cu3As. Under the conditions of roasting temperature of 673 K (400 °C), roasting time of 100 minutes, CuO amount of 34.54 mass pct, and N2 flow rate of 30 mL/min, 91.50 pct arsenic and only 8.63 pct antimony go into the smoke.

  11. Walking economy during cued versus non-cued self-selected treadmill walking in persons with Parkinson's disease.

    Science.gov (United States)

    Gallo, Paul M; McIsaac, Tara L; Garber, Carol Ewing

    2014-01-01

    Gait impairments related to Parkinson's disease (PD) include variable step length and decreased walking velocity, which may result in poorer walking economy. Auditory cueing is a common method used to improve gait mechanics in PD that has been shown to worsen walking economy at set treadmill walking speeds. It is unknown if auditory cueing has the same effects on walking economy at self-selected treadmill walking speeds. To determine if auditory cueing will affect walking economy at self-selected treadmill walking speeds and at speeds slightly faster and slower than self-selected. Twenty-two participants with moderate PD performed three, 6-minute bouts of treadmill walking at three speeds (self-selected and ± 0.22 m·sec-1). One session used cueing and the other without cueing. Energy expenditure was measured and walking economy was calculated (energy expenditure/power). Poorer walking economy and higher energy expenditure occurred during cued walking at a self-selected and a slightly faster walking speed, but there was no apparent difference at the slightly slower speed. These results suggest that potential gait benefits of auditory cueing may come at an energy cost and poorer walking economy for persons with PD at least at some treadmill walking speeds.

  12. Selective removal of Cu(Ⅱ) from contaminated water using molecularly imprinted polymer

    Institute of Scientific and Technical Information of China (English)

    Jingyao QI; Xin LI; Ying LI; Jianhua ZHU; Liangsheng QIANG

    2008-01-01

    A synthetic molecularly imprinted polymer (MIP) was prepared by noncovalent imprinting technique for the selective removal of Cu2+ from aqueous solutions. In the preparation of imprinted polymer, Cu2+ was used as the template, oleic acid as the functional monomer and divinylbenzene as the cross-linker. The surface morphol-ogies and characteristics of the MIP were determined by BET, scanning electron microscopy (SEM), FTIR and energy dispersive X-ray spectrometer (EDS). The proper adsorption and selective recognition ability of the MIP were studied by an equilibrium-adsorption method. In general, the removal efficiency of Cu2+ increased rapidly with pH from 2 to 7 and decreased at a pH 8. The removal efficiency of Cu2+ increased with temperature from 25℃ to 50℃. Competitive adsorption studies showed that the coexisting cations have no obvious influence on the adsorption of Cu2+. In addition, the variation in the adsorption ability of the MIP that was repeatedly used was investigated, and it showed excellent reproducibility.

  13. Development a Cu-based Metal Powder for Selective Laser Micro Sintering

    Energy Technology Data Exchange (ETDEWEB)

    Dai, C; Zhu, H H; Ke, L D; Lei, W J [Division of Laser Science and Technology, Wuhan National Laboratory for Optoelectronics, Institute of Optoelectronics Science and Engineering (China); Chen, B J, E-mail: chenbaijin@mail.hust.edu.cn [State Key Laboratory of Material Processing and Die and Mould Technology, Huazhong University of Science and Technology, Wuhan, Hubei, 430074, P. R. of China (China)

    2011-02-01

    A Cu-based metal powder which consists of Cu and Cu-P alloy for selective micro laser sintering has been developed based on the theoretical analysis of the characteristics of the laser micro sintering metal powder. The characteristics of the wetting, capillary force and viscosity have been considered. The preliminary experimental investigation on the selective laser micro sintering Cu-based metal powder has been performed. A 50 W CW Nd:YAG laser was employed to sinter the developed metal powder mixture. The sintering mechanism and the effect of the process parameters on the characteristics of the sintering samples have been preliminary investigated. The results show that the mechanism of laser micro sintering this developed metal powder is liquid-phase sintering and Cu-P alloy powder plays an effectively binder in the sintering process. The process parameter has significant effects on the characteristics of the sintering parts. From the SEM image, two different microstructures of samples with different scan spacing parameters were compared and a better binding effect was obtained at a parameter of 0.05mm scan spacing.

  14. Effect of pretreatment methods on the performance of Cu-Zr-Ce-O catalyst for CO selective oxidation

    Institute of Scientific and Technical Information of China (English)

    Hanbo Zou; Shengzhou Chen; Weiming Lin

    2008-01-01

    The Cu-Zr-Ce-O catalysts prepared using the coprecipitation method exhibited better catalytic performance for CO selective oxidation. The Cu-Zr-Ce-O catalysts pretreated with different methods were studied by CO-TPR and XPS techniques.The results showed that the Cu-Zr-Ce-O catalyst pretreated with oxygen exhibited the best catalytic performance and had the widest operating temperature window, with CO conversion above 99% from 160 to 200 ℃. The O2 pretreatment caused an enrichment of the oxygen storaged on the Cu active species and promoted the conversion of adsorbed oxygen into surface lattice oxygen. It also improved the amount of Cu+/Cu2+ ionic pair, and then facilitated the formation of CuO active species on the catalyst for selective CO oxidation.

  15. Selective precipitation of Cu from Zn in a pS controlled continuously stirred tank reactor

    NARCIS (Netherlands)

    Sampaio, R.M.; Timmers, R.A.; Xu, Y.; Keesman, K.J.; Lens, P.N.L.

    2009-01-01

    Copper was continuously and selectively precipitated with Na2S to concentrations below 0.3 ppb from water containing around 600 ppm of both Cu and Zn in a Continuously Stirred Tank Reactor. The pH was controlled at 3 and the pS at 25 (pS = ¿log(S2¿)) by means of an Ag2S sulfide selective electrode.

  16. Novel coumarin-based fluorescent probe for selective detection of Cu(II)

    Science.gov (United States)

    Bekhradnia, Ahmadreza; Domehri, Elham; Khosravi, Masome

    2016-01-01

    We report an efficient and convenient method for preparing nitro-3-carboxamide coumarin derivatives, proposed as novel fluorescent chemosensor, through microwave irradiation. This compound can be used as fluorescent probe for Cu2+ with selectivity over other metal ions in aqueous solution. The fluorescence of 6-nitro-N-[2-(dimethylamino)ethyl]-2-oxo-2H-chromene-3-carboxamide(3) is the highest in the presence of Cu2+, with stronger excitation at λ = 320 nm than for the other cations tested.

  17. New influence factor inducing difficulty in selective flotation separation of Cu-Zn mixed sulfide minerals

    Science.gov (United States)

    Deng, Jiu-shuai; Mao, Ying-bo; Wen, Shu-ming; Liu, Jian; Xian, Yong-jun; Feng, Qi-cheng

    2015-02-01

    Selective flotation separation of Cu-Zn mixed sulfides has been proven to be difficult. Thus far, researchers have found no satisfactory way to separate Cu-Zn mixed sulfides by selective flotation, mainly because of the complex surface and interface interaction mechanisms in the flotation solution. Undesired activation occurs between copper ions and the sphalerite surfaces. In addition to recycled water and mineral dissolution, ancient fluids in the minerals are observed to be a new source of metal ions. In this study, significant amounts of ancient fluids were found to exist in Cu-Zn sulfide and gangue minerals, mostly as gas-liquid fluid inclusions. The concentration of copper ions released from the ancient fluids reached 1.02 × 10-6 mol/L, whereas, in the cases of sphalerite and quartz, this concentration was 0.62 × 10-6 mol/L and 0.44 × 10-6 mol/L, respectively. As a result, the ancient fluid is a significant source of copper ions compared to mineral dissolution under the same experimental conditions, which promotes the unwanted activation of sphalerite. Therefore, the ancient fluid is considered to be a new factor that affects the selective flotation separation of Cu-Zn mixed sulfide ores.

  18. Selective removal and patterning of a Co/Cu/Co trilayer created by femtosecond laser processing

    Energy Technology Data Exchange (ETDEWEB)

    Ulmeanu, M.; Filipescu, M.; Scarisoreanu, N.D.; Georgescu, G.; Rusen, L.; Zamfirescu, M. [National Institute for Laser, Plasma and Radiation Physics, Laser Department, Atomistilor Str. 409, P.O. Box MG-36, Magurele-Bucharest (Romania)

    2011-07-15

    The selective removal and patterning of a typical pseudo-spin-valve structure, consisting of a Co(20 nm)/ Cu(6 nm)/Co(3 nm) trilayer, by femtosecond laser has been examined in terms of irradiation parameters and layer structure. Ablation thresholds of the individual Co and Cu thin films and the SiO{sub 2}/Si substrate have been measured for single-shot irradiation with a 200 femtosecond (fs) laser pulses of a Ti:sapphire laser operating at 775 nm. Ablation of the entire trilayer structure was characterized by a sequential removal of the layers at a threshold level of fluence of 0.28 J/cm{sup 2}. Atomic Force Microscopy, optical microscopy, profilometry and Sputtered Neutral Mass Spectroscopy were employed to characterize the laser-induced single-shot laser selective removal and patterned areas. As a result, two phenomena were found to characterize the laser process: (i) selective removal of the Co and Cu layer due to the change of the laser fluence and (ii) regular pillars' area of Co/Cu/Co could be achieved in a regular manner with the lowest pillar width size of 1.5 {mu}m. Ablation through the layers was accompanied by the formation of bulges at the edges of the pillars, which was the biggest inconvenience in lowering the pillar size through the femtosecond laser process. (orig.)

  19. A new hydroxynaphthyl benzothiazole derived fluorescent probe for highly selective and sensitive Cu2 + detection

    Science.gov (United States)

    Tang, Lijun; He, Ping; Zhong, Keli; Hou, Shuhua; Bian, Yanjiang

    2016-12-01

    A new reactive probe, 1-(benzo[d]thiazol-2-yl)naphthalen-2-yl-picolinate (BTNP), was designed and synthesized. BTNP acts as a highly selective probe to Cu2 + in DMSO/H2O (7/3, v/v, Tris-HCl 10 mM, pH = 7.4) solution based on Cu2 + catalyzed hydrolysis of the picolinate ester moiety in BTNP, which leads to the formation of an ESIPT active product with dual wavelength emission enhancement. The probe also possesses the advantages of simple synthesis, rapid response and high sensitivity. The pseudo-first-order reaction rate constant was calculated to be 0.205 min- 1. Moreover, application of BTNP to Cu2 + detection in living cells and real water samples was also explored.

  20. Heteropoly acid promoted Cu and Fe catalysts for the selective catalytic reduction of NO with ammonia

    DEFF Research Database (Denmark)

    Putluru, Siva Sankar Reddy; Mossin, Susanne L.; Riisager, Anders

    2011-01-01

    Cu/TiO2, Fe/TiO2 and heteropoly acid promoted Cu/TiO2, Fe/TiO2 catalysts were prepared and characterized by N2 physisorption, XRPD, NH3-TPD, H2-TPR and EPR. The catalysts exhibited only crystalline TiO2 phases with the active metals and promoters in highly dispersed state. The acidic properties...... activity and acidity was lower for promoted catalysts than for unpromoted catalysts. In the heteropoly acid promoted catalysts the SCR active Cu and Fe metals were protected from potassium poisons by bonding of the potassium to the Brønsted acid centres. Thus heteropoly acid promoted catalysts might...... were studied and compared with the catalytic activity for the selective catalytic reduction (SCR) of NO with ammonia. The SCR activities and acidity values of heteropoly acid promoted catalysts were found to be much higher than unpromoted catalysts. The influence of potassium poisons on the SCR...

  1. Sub-micron Cu/SSZ-13: Synthesis and application as selective catalytic reduction (SCR) catalysts

    Energy Technology Data Exchange (ETDEWEB)

    Prodinger, Sebastian; Derewinski, Miroslaw A.; Wang, Yilin; Washton, Nancy M.; Walter, Eric D.; Szanyi, János; Gao, Feng; Wang, Yong; Peden, Charles H. F.

    2017-02-01

    For the first time, sub-micron Cu/SSZ-13, obtained by modifying an existing synthesis procedure, was shown to be an effective and stable catalyst for selective catalytic reduction reactions, such as NO reduction. Characterization of the materials with X-ray diffraction, N2-physisorption and 27Al MAS NMR shows that hydrothermal aging, simulating SCR reaction conditions, is more destructive in respect to dealumination for smaller particles prior to Cu-exchange. However, the catalytic performance and hydrothermal stability for Cu/SSZ-13 is independent of the particle size. In particular, the stability of tetrahedral framework Al is improved in the sub-micron Cu/SSZ-13 catalysts of comparable Cu loading. This indicates that variations in the Al distribution for different SSZ-13 synthesis procedures have a more critical influence on stabilizing isolated Cu-ions during harsh hydrothermal aging than the particle size. This study is of high interest for applications in vehicular DeNOx technologies where high loadings of active species on wash coats can be achieved by using sub-micron Cu/SSZ-13. The authors would like to thank B. W. Arey and J. J. Ditto for performing electron microscope imaging. The authors gratefully acknowledge the US Department of Energy (DOE), Energy Efficiency and Renewable Energy, Vehicle Technologies Office for the support of this work. S. P and M. A. D also acknowledge support by the Materials Synthesis and Simulation Across Scales (MS3 Initiative) conducted under the Laboratory Directed Research & Development Program at PNNL. The research described in this paper was performed in the Environmental Molecular Sciences Laboratory (EMSL), a national scientific user facility sponsored by the DOE’s Office of Biological and Environmental Research and located at Pacific Northwest National Laboratory (PNNL). PNNL is operated for the US DOE by Battelle.

  2. A Cu2+-selective fluorescent chemosensor based on BODIPY with two pyridine ligands and logic gate

    Science.gov (United States)

    Huang, Liuqian; Zhang, Jing; Yu, Xiaoxiu; Ma, Yifan; Huang, Tianjiao; Shen, Xi; Qiu, Huayu; He, Xingxing; Yin, Shouchun

    2015-06-01

    A novel near-infrared fluorescent chemosensor based on BODIPY (Py-1) has been synthesized and characterized. Py-1 displays high selectivity and sensitivity for sensing Cu2+ over other metal ions in acetonitrile. Upon addition of Cu2+ ions, the maximum absorption band of Py-1 in CH3CN displays a red shift from 603 to 608 nm, which results in a visual color change from pink to blue. When Py-1 is excited at 600 nm in the presence of Cu2+, the fluorescent emission intensity of Py-1 at 617 nm is quenched over 86%. Notably, the complex of Py-1-Cu2+ can be restored with the introduction of EDTA or S2-. Consequently, an IMPLICATION logic gate at molecular level operating in fluorescence mode with Cu2+ and S2- as chemical inputs can be constructed. Finally, based on the reversible and reproducible system, a nanoscale sequential memory unit displaying "Writing-Reading-Erasing-Reading" functions can be integrated.

  3. Effects of Cu exposure on enzyme activities and selection for microbial tolerances during swine-manure composting.

    Science.gov (United States)

    Li, Yanxia; Liu, Bei; Zhang, Xuelian; Gao, Min; Wang, Jing

    2015-01-01

    A simulated experiment of aerobic composting was conducted on swine manure to evaluate the effects of Cu at two exposure levels (200 and 2000 mg kg(-1), corresponding to low-Cu and high-Cu treatments, respectively) on the activity of microorganisms. In addition, the microbial pollution-induced community tolerance (PICT) to Cu and co-tolerance to selected antibiotics (tylosin and vancomycin) in the composted products were also investigated using the Biolog Ecoplates™ method. It was demonstrated that the enzymatic activities were significantly inhibited by the high-Cu treatment, with maximal inhibition rates of 56.8% and 65.1% for urease and dehydrogenase, respectively. In response to the PICT test, the IC50 (half-maximal inhibition concentrations) values on the microorganisms in the high-Cu-treated composts were clearly higher than those in the low-Cu-treated and control composts, for the toxicity tests on both Cu and antibiotics, including tylosin and vancomycin. The data demonstrated that high-Cu exposure to the microbial community during the composting not only selected for Cu resistance but also co-selected for antibiotic resistance, which was of significance because the tolerance might be transferred to the soil after the land application of composted manure.

  4. Orbital-selective Mott phase of Cu-substituted iron-based superconductors

    Science.gov (United States)

    Liu, Yang; Zhao, Yang-Yang; Song, Yun

    2016-07-01

    We study the phase transition in Cu-substituted iron-based superconductors with a new developed real-space Green’s function method. We find that Cu substitution has strong effect on the orbital-selective Mott transition introduced by the Hund’s rule coupling. The redistribution of the orbital occupancy which is caused by the increase of the Hund’s rule coupling, gives rise to the Mott-Hubbard metal-insulator transition in the half-filled d xy orbital. We also find that more and more electronic states appear inside that Mott gap of the d xy orbital with the increase of Cu substitution, and the in-gap states around the Fermi level are strongly localized at some specific lattice sites. Further, a distinctive phase diagram, obtained for the Cu-substituted Fe-based superconductors, displays an orbital-selective insulating phase, as a result of the cooperative effect of the Hund’s rule coupling and the impurity-induced disorder.

  5. Selective precipitation of Cu from Zn in a pS controlled continuously stirred tank reactor

    Energy Technology Data Exchange (ETDEWEB)

    Sampaio, R.M.M., E-mail: ricardo.sampaio@wur.nl [Sub-department of Environmental Technology, Wageningen University, ' Biotechnion' , Bomenweg 2, P.O. Box 8129, 6700 EV Wageningen (Netherlands); Timmers, R.A., E-mail: ruud.timmers@wur.nl [Sub-department of Environmental Technology, Wageningen University, ' Biotechnion' , Bomenweg 2, P.O. Box 8129, 6700 EV Wageningen (Netherlands); Xu, Y., E-mail: lucyxyzxyz@hotmail.com [Sub-department of Environmental Technology, Wageningen University, ' Biotechnion' , Bomenweg 2, P.O. Box 8129, 6700 EV Wageningen (Netherlands); Keesman, K.J., E-mail: karel.keesman@wur.nl [Systems and Control Group, Wageningen University, Bornsesteeg 59, 6708 PD Wageningen (Netherlands); Lens, P.N.L., E-mail: piet.lens@wur.nl [Sub-department of Environmental Technology, Wageningen University, ' Biotechnion' , Bomenweg 2, P.O. Box 8129, 6700 EV Wageningen (Netherlands)

    2009-06-15

    Copper was continuously and selectively precipitated with Na{sub 2}S to concentrations below 0.3 ppb from water containing around 600 ppm of both Cu and Zn in a Continuously Stirred Tank Reactor. The pH was controlled at 3 and the pS at 25 (pS = -log(S{sup 2-})) by means of an Ag{sub 2}S sulfide selective electrode. Copper's recovery and purity were about 100%, whereas the total soluble sulfide concentration was below 0.02 ppm. X-ray diffraction (XRD) analysis showed that copper precipitated as hexagonal CuS (covellite). The mode of the particle size distribution (PSD) of the CuS precipitates was around 36 {mu}m. The PSD increased by high pS values and by the presence of Zn. Depending on the turbulence, the CuS precipitates can grow up to 200 {mu}m or fragment in particles smaller than 3 {mu}m in a few seconds. Zn precipitation with Na{sub 2}S at pH 3 and 4, in batch, always lead to Zn concentrations above 1 ppm. Zn precipitated as cubic ZnS (spharelite).

  6. Physical Properties and Selective CO Oxidation of Coprecipitated CuO/CeO2 Catalysts Depending on the CuO in the Samples

    Directory of Open Access Journals (Sweden)

    Akkarat Wongkaew

    2013-01-01

    Full Text Available This paper investigates the effects of CuO contents in the CuO-CeO2 catalysts to the variation in physical properties of CuO/CeO2 catalysts and correlates them to their catalytic activities on selective CO oxidation. The characteristic of crystallites were revealed by X-ray diffraction, and their morphological developments were examined with TEM, SEM, and BET methods. Catalytic performance of catalysts was investigated in the temperature range of 90–240°C. The results showed that the catalyst was optimized at CuO loading of 20 wt.%. This was due to the high dispersion of CuO, high specific surface area, small crystallite sizes, and low degree of CuO agglomeration. Complete CO conversion with near 100% selectivity was achieved at a temperature below 120°C. The optimal performance was seen as a balance between CuO content and dispersion observed with growth, morphology, and agglomeration of nanostructures.

  7. 21 CFR 200.200 - Prescription drugs; reminder advertisements and reminder labeling to provide price information to...

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 4 2010-04-01 2010-04-01 false Prescription drugs; reminder advertisements and... Prescription Drug Consumer Price Listing § 200.200 Prescription drugs; reminder advertisements and reminder labeling to provide price information to consumers. (a) Prescription drug reminder advertisements...

  8. Evaluation of smartphone oral contraceptive reminder applications.

    Science.gov (United States)

    Gal, Noga; Zite, Nikki B; Wallace, Lorraine S

    2015-01-01

    Oral contraceptives (OCs) are the most widely used contraceptive method among women of reproductive age in the United States (US). Routine download and use of health-related smartphone applications (apps) continues to increase. The purpose of this study was to evaluate the utility of English-language, smartphone-platform OC reminder apps currently available for download in the US. During June-July 2013, official Internet-based, mobile app platforms for the two major smartphone operating systems in the US-Android (Google Play Store) and iPhone (iTunes)-were searched. "Birth control," "the pill," and "contraception" were entered into the search-bar of each Smartphone store. Apps were assessed for the following: cost, health care professionals' involvement in app development, reminder mechanisms, and functionality. Of the 39 unique OC reminder apps meeting inclusion criteria, 7 (18%) did not operate as intended when downloaded. Most apps functioned without an Internet connection (97%) and included pop-up notifications (84%). Certain app features overcome common causes of missing an alarm, and hypothetically, may minimize likelihood of an OC user missing a daily pill. Health care providers should inform users of potential pitfalls and advise them that an OC reminder app should be not be used as a sole reminder method. Copyright © 2015 Elsevier Inc. All rights reserved.

  9. Selective oxidation of cyclohexane on a novel catalyst Mg-Cu/SBA-15 by molecular oxygen.

    Science.gov (United States)

    Duan, Xiaogang; Liu, Weimin; Yue, Lumin; Fu, Wei; Ha, Minh Ngoc; Li, Jun; Lu, Guanzhong

    2015-10-21

    The novel catalysts xMg-2.3Cu/SBA-15 with copper and magnesium oxide co-supported on mesoporous silica were synthesized by an impregnation method. The newly synthesized catalysts were characterized using a series of techniques such as BET, XRD, H2-TPR, UV-vis, XPS, EDS and TEM. The catalytic performance was evaluated by using selective oxidation of cyclohexane with molecular oxygen as the oxidant in a solvent free system. The incorporation of magnesium improved the dispersion of copper oxide and prevented the deep oxidation of cyclohexanol and cyclohexanone. The selectivity of K/A oil was up to 99.3% with 12% conversion of cyclohexane over the 1.2Mg-2.3Cu/SBA-15 catalyst. To our knowledge, this is the best result for the heterogeneous oxidation of cyclohexane by O2.

  10. Effect of Cu toxicity at different salinity on selective group of juvenile pompano Trachinotus ovatus

    Institute of Scientific and Technical Information of China (English)

    OU You-jun; LI Jia-er; CAI Wen-chao

    2014-01-01

    Effects of copper toxicity and salinity shock on selective group of juvenile pompano Trachinotus ovatus were investigated. The fish were exposed to different Cu2+ concentrations of 0 (blank), 0.02 (C1), 0.05 (C2), 0.10 (C3), and 0.15 mg·L-1 (C4) at a salinity of 10‰ or 40‰ for 96 h, with the salinity of 29‰ as the control. The results showed that the effects of the acute salinity stimulation to survival rates of pompano between control (29‰) and lower or higher salinity for 96 h were not significant (p>0.05). However, the survival rates in each treatment were decreased with the increase of Cu2+concentration. The dominant factor influencing body moisture of the fish was salinity, and there was no sign that body moisture was correlated with exposure to Cu2+. The gill lamellas in high level of Cu2+concentration (C4 treatments) were abnormal under the salinity of 40‰ and extremely curly under the salinity of 10‰. Hemorrhage in gill was observed in the two C4 treatments. Under transmission electron microscope, pillar cells in gill lamellas appeared deformed and ruptured in some areas of the epithelia in the higher concentration of Cu2+, resulting in the death of the fish due to the destruction of gill tissue, elevation of the arithmetic mean distance from water to blood, the decrease of oxygen diffusion capacity, and other physiological functions. These findings indicate that the pompano might suffer much more pressure when encountered with Cu2+ pollution and low salinity.

  11. Isolation of the copper redox steps in the standard selective catalytic reduction on Cu-SSZ-13.

    Science.gov (United States)

    Paolucci, Christopher; Verma, Anuj A; Bates, Shane A; Kispersky, Vincent F; Miller, Jeffrey T; Gounder, Rajamani; Delgass, W Nicholas; Ribeiro, Fabio H; Schneider, William F

    2014-10-27

    Operando X-ray absorption experiments and density functional theory (DFT) calculations are reported that elucidate the role of copper redox chemistry in the selective catalytic reduction (SCR) of NO over Cu-exchanged SSZ-13. Catalysts prepared to contain only isolated, exchanged Cu(II) ions evidence both Cu(II) and Cu(I) ions under standard SCR conditions at 473 K. Reactant cutoff experiments show that NO and NH3 together are necessary for Cu(II) reduction to Cu(I). DFT calculations show that NO-assisted NH3 dissociation is both energetically favorable and accounts for the observed Cu(II) reduction. The calculations predict in situ generation of Brønsted sites proximal to Cu(I) upon reduction, which we quantify in separate titration experiments. Both NO and O2 are necessary for oxidation of Cu(I) to Cu(II), which DFT suggests to occur by a NO2 intermediate. Reaction of Cu-bound NO2 with proximal NH4(+) completes the catalytic cycle. N2 is produced in both reduction and oxidation half-cycles.

  12. Isolation of the Copper Redox Steps in the Standard Selective Catalytic Reduction on Cu-SSZ-13

    Energy Technology Data Exchange (ETDEWEB)

    Paolucci, Christopher; Verma, Anuj A.; Bates, Shane A.; Kispersky, Vincent F.; Miller, Jeffrey T.; Gounder, Rajmani; Delgass, Nick; Ribeiro, Fabio; Schneider, William F.

    2014-10-27

    Operando X-ray absorption experiments and density functional theory (DFT) calculations are reported that elucidate the role of copper redox chemistry in the selective catalytic reduction (SCR) of NO over Cu-exchanged SSZ-13. Catalysts prepared to contain only isolated, exchanged CuII ions evidence both CuII and CuI ions under standard SCR conditions at 473 K. Reactant cutoff experiments show that NO and NH3 together are necessary for CuII reduction to CuI. DFT calculations show that NO-assisted NH3 dissociation is both energetically favorable and accounts for the observed CuII reduction. The calculations predict in situ generation of Brønsted sites proximal to CuI upon reduction, which we quantify in separate titration experiments. Both NO and O2 are necessary for oxidation of CuI to CuII, which DFT suggests to occur by a NO2 intermediate. Reaction of Cu-bound NO2 with proximal NH4 + completes the catalytic cycle. N2 is produced in both reduction and oxidation half-cycles.

  13. A novel coping metal material CoCrCu alloy fabricated by selective laser melting with antimicrobial and antibiofilm properties

    Energy Technology Data Exchange (ETDEWEB)

    Ren, Ling [Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016 (China); Memarzadeh, Kaveh [Institute of Dentistry, Barts and The London School of Medicine & Dentistry, Queen Mary University of London, Newark Street, London E1 2AT (United Kingdom); Zhang, Shuyuan; Sun, Ziqing; Yang, Chunguang [Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016 (China); Ren, Guogang [University of Hertfordshire, Hatfield AL10 9AB (United Kingdom); Allaker, Robert P., E-mail: r.p.allaker@qmul.ac.uk [Institute of Dentistry, Barts and The London School of Medicine & Dentistry, Queen Mary University of London, Newark Street, London E1 2AT (United Kingdom); Yang, Ke, E-mail: kyang@imr.ac.cn [Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016 (China)

    2016-10-01

    Objective: The aim of this study was to fabricate a novel coping metal CoCrCu alloy using a selective laser melting (SLM) technique with antimicrobial and antibiofilm activities and to investigate its microstructure, mechanical properties, corrosion resistance and biocompatibility. Methods: Novel CoCrCu alloy was fabricated using SLM from a mixture of commercial CoCr based alloy and elemental Cu powders. SLM CoCr without Cu served as control. Antibacterial activity was analyzed using standard antimicrobial tests, and antibiofilm properties were investigated using confocal laser scanning microscope. Cu distribution and microstructure were determined using scanning electron microscope, optical microscopy and X-ray diffraction. Corrosion resistance was evaluated by potential dynamic polarization and biocompatibility measured using an MTT assay. Results: SLM CoCrCu alloys were found to be bactericidal and able to inhibit biofilm formation. Other factors such as microstructure, mechanical properties, corrosion resistance and biocompatibility were similar to those of SLM CoCr alloys. Significance: The addition of appropriate amounts of Cu not only maintains normal beneficial properties of CoCr based alloys, but also provides SLM CoCrCu alloys with excellent antibacterial and antibiofilm capabilities. This material has the potential to be used as a coping metal for dental applications. - Highlights: • Novel CoCrCu alloys were fabricated by using selective laser melting (SLM). • SLM CoCrCu alloys showed satisfied antimicrobial and antibiofilm activities. • SLM CoCrCu alloys have no cytotoxic effect on normal cells. • Other properties of SLM CoCrCu alloys were similar to SLM CoCr alloys. • SLM CoCrCu alloys have the potential to be used as coping metals.

  14. Local Environment and Nature of Cu Active Sites in Zeolite-Based Catalysts for the Selective Catalytic Reduction of NOx

    NARCIS (Netherlands)

    Deka, U.; Lezcano-Gonzalez, I.; Weckhuysen, B.M.; Beale, A.M.

    2013-01-01

    Cu-exchanged zeolites have demonstrated widespread use as catalyst materials in the abatement of NOx, especially from mobile sources. Recent studies focusing on Cu-exchanged zeolites with the CHA structure have demonstrated them to be excellent catalysts in the ammonia-assisted selective catalytic r

  15. The mechanism of selective catalytic reduction of NOx on Cu-SSZ-13 - a computational study.

    Science.gov (United States)

    Crandell, Douglas W; Zhu, Haiyang; Yang, Xiaofan; Hochmuth, John; Baik, Mu-Hyun

    2017-01-03

    The copper-exchanged aluminosilicate zeolite SSZ-13 is a leading catalyst for the selective catalytic reduction of NO. Density functional theory calculations are used to construct a complete catalytic cycle of this process paying special attention to the coordination geometries and redox states of copper. N2 can be produced in the reduction half-cycle via a nitrosamine intermediate generated from the reaction of the additive reductant NH3 with a NO(+) intermediate stabilized by the zeolite lattice. The decomposition of this nitrosamine species can be assisted by incipient Brønsted acid sites generated during catalysis. Our calculations also suggest that the reoxidation of Cu(i) to Cu(ii) requires the addition of both NO and O2. The production of a second equivalent of N2 during the oxidation half-cycle proceeds through a peroxynitrite intermediate to form a Cu-nitrite intermediate, which may react with an acid, either HNO2 or NH4(+) to close the catalytic cycle. Models of copper neutralized by an external hydroxide ligand are also examined. These calculations form a key basis for understanding the mechanism of NO reduction in Cu-SSZ-13 in order to develop strategies for rationally optimizing the performance in future experiments.

  16. Highly selective PdCu/amorphous silica-alumina (ASA) catalysts for groundwater denitration.

    Science.gov (United States)

    Xie, Yongbing; Cao, Hongbin; Li, Yuping; Zhang, Yi; Crittenden, John C

    2011-05-01

    Catalytic nitrate reduction is a promising technology in groundwater purification. In this study, PdCu bimetallic catalysts supported on an industrial amorphous silica-alumina (ASA) were synthesized and used to simulate catalytic removal of nitrate in groundwater. The catalysts exhibited very high activity and the highest catalytic selectivity toward N₂O and N₂ was 90.2%. The optimal Pd/Cu weight ratio was four. Relatively low reduction temperature was found benefit the catalytic stability and 300 °C was the appropriate reduction temperature during catalyst preparation. With an average particle size 5.4 nm, the metal particles were very uniformly distributed on the catalyst surface prepared with the codeposition method. This kept the catalyst more stable than the PdCu/Al₂O₂ catalyst with larger metal particles. According to XRD, TEM, and XPS results, the metals maintained zero-valence but aggregated by about 2 nm during the denitration reaction, which caused gradual deactivation of the catalysts. Little leaching of Cu and Pd from the catalyst might also have a slightly negative impact to the stability of the catalysts. A simple treatment was found to redistribute the particles on the deactivated catalysts, and high catalytic activity was recovered after this process.

  17. Effect of metal oxidation state on FRET: a Cu(I) silent but selectively Cu(II) responsive fluorescent reporter and its bioimaging applications.

    Science.gov (United States)

    Pal, Siddhartha; Sen, Buddhadeb; Lohar, Somenath; Mukherjee, Manjira; Banerjee, Samya; Chattopadhyay, Pabitra

    2015-01-28

    Copper(II) and copper(I) complexes of a newly designed and crystallographically characterized Schiff base (HL) derived from rhodamine hydrazide and cinnamaldehyde were isolated in pure form formulated as [Cu(L)(NO3)] (L-Cu) (1) and [Cu(HL)(CH3CN)(H2O)]ClO4 (HL-Cu) (2), and characterized by physicochemical and spectroscopic tools. Interestingly, complex 1 but not 2 offers red fluorescence in solution state, and eventually HL behaves as a Cu(II) ions selective FRET based fluorosensor in HEPES buffer (1 mM, acetonitrile-water: 1/5, v/v) at 25 °C at biological pH with almost no interference of other competitive ions. The dependency of the FRET process on the +2 oxidation state of copper has been nicely supported by exhaustive experimental studies comprising electronic, fluorimetric, NMR titration, and theoretical calculations. The sensing ability of HL has been evaluated by the LOD value towards Cu(II) ions (83.7 nM) and short responsive time (5-10 s). Even the discrimination of copper(I) and copper(II) has also been done using only UV-Vis spectroscopic study. The efficacy of this bio-friendly probe has been determined by employing HL to detect the intercellular distribution of Cu(II) ions in HeLa cells by developing image under fluorescence microscope.

  18. Cu substitution effects on the local magnetic properties of Ba(Fe(1-x)Cu(x))(2)As(2): a site-selective (75)As and (63)Cu NMR study.

    Science.gov (United States)

    Takeda, Hikaru; Imai, Takashi; Tachibana, Makoto; Gaudet, Jonathan; Gaulin, Bruce D; Saparov, Bayrammurad I; Sefat, Athena S

    2014-09-12

    We take advantage of the site-selective nature of the ^{75}As and ^{63}Cu NMR techniques to probe the Cu substitution effects on the local magnetic properties of the FeAs planes in Ba(Fe_{1-x}Cu_{x})_{2}As_{2}. We show that the suppression of antiferromagnetic Fe spin fluctuations induced by Cu substitution is weaker than a naive expectation based on a simple rigid band picture, in which each Cu atom would donate three electrons to the FeAs planes. Comparison between ^{63}Cu and ^{75}As NMR data indicates that spin fluctuations are suppressed at the Cu and their neighboring Fe sites in the tetragonal phase, suggesting the strongly local nature of the Cu substitution effects. We attribute the absence of a large superconducting dome in the phase diagram of Ba(Fe_{1-x}Cu_{x})_{2}As_{2} to the emergence of a nearly magnetically ordered FeAs plane under the presence of orthorhombic distortion.

  19. Selective synthesis of clinoatacamite Cu2(OH)3Cl and tenorite CuO nanoparticles by pH control

    DEFF Research Database (Denmark)

    Engelbrekt, Christian; Malcho, Phillip; Andersen, Jonas

    2014-01-01

    , it directed the growth of Cu2(OH)3Cl to provide pure clinoatacamite without the presence of related poly- morphs. The products were characterized by transmission electron microscopy, infrared spectroscopy, ultraviolet–visible light spectroscopy, X-ray powder diffraction (XRD), scanning transmission X......-ray microscopy and atomic force microscopy. Infrared spectroscopy was essential for characterization of closely related polymorphs of Cu2(OH)3Cl indistinguishable by XRD. A plausible mechanism has been proposed and discussed for the formation of the CuO and Cu2(OH)3Cl nanostructures....

  20. Selective catalytic reduction of NO by NH3 on Cu-faujasite catalysts: an experimental and quantum chemical approach.

    Science.gov (United States)

    Delahay, Gérard; Villagomez, Enrique Ayala; Ducere, Jean-Marie; Berthomieu, Dorothée; Goursot, Annick; Coq, Bernard

    2002-08-16

    The selective catalytic reduction (SCR) of NO by NH3 in the presence of O2 on Cu-faujasite (Cu-FAU) has been studied. Substitution of some Cu2+ with H+ and Na+ cations, compensating for the negative charge of the zeolite framework, forms the various CuHNa-FAU studied. The amount of Cu was held constant and the proportion of H+ and Na+ varied in the sample. The substitution of Na+ for H+ increases sharply the SCR rate by lowering the temperature of reaction by about 150 K. It is proposed that the rate increase mainly comes from an unhindered migration of Cu from hidden to active sites and a modification of the redox properties of Cu species. The former was demonstrated by diffuse reflectance IR spectroscopy of adsorbed CO. The change in redox properties was demonstrated by a faster oxidation of Cu+ to Cu2+ (rate-determining step). Quantum chemical calculations on model clusters of CuHNa-FAU indicate that the faster rate of oxidation can be explained by a higher lability of protons in the absence of Na, which can be then removed from the catalyst more easily to yield H2O during the oxidation process.

  1. Properties of Cu-Based Shape-Memory Alloys Prepared by Selective Laser Melting

    Science.gov (United States)

    Gustmann, T.; dos Santos, J. M.; Gargarella, P.; Kühn, U.; Van Humbeeck, J.; Pauly, S.

    2016-12-01

    Two shape-memory alloys with the nominal compositions (in wt.%) Cu-11.85Al-3.2Ni-3Mn and Cu-11.35Al-3.2Ni-3Mn-0.5Zr were prepared by selective laser melting (SLM). The parameters were optimised to identify the process window, in which almost fully dense samples can be obtained. Their microstructures were analysed and correlated with the shape-memory behaviour as well as the mechanical properties. Suction-cast specimens were also produced for comparison. Mainly, β 1' martensite forms in all samples, but 0.5 wt.% of Zr stabilises the Y phase (Cu2AlZr), and its morphology depends on the thermal history and cooling rate. After annealing, the Y phase is primarily found at the grain boundaries hampering grain coarsening. Due to the relative high cooling rates applied here, Zr is mostly dissolved in the martensite in the as-prepared samples and it has a grain-refining effect only up to a critical cooling rate. The Zr-containing samples have increased transformation temperatures, and the Y phase seems to be responsible for the jerky martensite-to-austenite transformation. All the samples are relatively ductile because they mostly fracture in a transgranular manner, exhibiting the typical double yielding. Selective laser melting allows the adjustment of the transformation temperatures and the mechanical properties already during processing without the need of a subsequent heat treatment.

  2. Properties of Cu-Based Shape-Memory Alloys Prepared by Selective Laser Melting

    Science.gov (United States)

    Gustmann, T.; dos Santos, J. M.; Gargarella, P.; Kühn, U.; Van Humbeeck, J.; Pauly, S.

    2017-03-01

    Two shape-memory alloys with the nominal compositions (in wt.%) Cu-11.85Al-3.2Ni-3Mn and Cu-11.35Al-3.2Ni-3Mn-0.5Zr were prepared by selective laser melting (SLM). The parameters were optimised to identify the process window, in which almost fully dense samples can be obtained. Their microstructures were analysed and correlated with the shape-memory behaviour as well as the mechanical properties. Suction-cast specimens were also produced for comparison. Mainly, β 1' martensite forms in all samples, but 0.5 wt.% of Zr stabilises the Y phase (Cu2AlZr), and its morphology depends on the thermal history and cooling rate. After annealing, the Y phase is primarily found at the grain boundaries hampering grain coarsening. Due to the relative high cooling rates applied here, Zr is mostly dissolved in the martensite in the as-prepared samples and it has a grain-refining effect only up to a critical cooling rate. The Zr-containing samples have increased transformation temperatures, and the Y phase seems to be responsible for the jerky martensite-to-austenite transformation. All the samples are relatively ductile because they mostly fracture in a transgranular manner, exhibiting the typical double yielding. Selective laser melting allows the adjustment of the transformation temperatures and the mechanical properties already during processing without the need of a subsequent heat treatment.

  3. The Effect of Copper Loading on the Selective Catalytic Reduction of Nitric Oxide by Ammonia Over Cu-SSZ-13

    Energy Technology Data Exchange (ETDEWEB)

    Kwak, Ja Hun; Tran, Diana N.; Szanyi, Janos; Peden, Charles HF; Lee, Jong H.

    2012-03-01

    The effect of Cu loading on the selective catalytic reduction of NOx by NH3 was examined over 20-80% ion-exchanged Cu-SSZ-13 zeolite catalysts. High NO reduction efficiency (80-95%) was obtained over all catalyst samples between 250 and 500°C, and the gas hourly space velocity of 200,000 h-1. Both NO reduction and NH3 oxidation activities under these conditions were found to increase slightly with increasing Cu loading at low temperatures. However, NO reduction activity was suppressed with increasing Cu loadings at high temperatures (>500oC) due to excess NH3 oxidation. The optimum Cu ion exchange level appears to be ~40-60% as higher than 80% NO reduction efficiency was obtained over 50% Cu ion-exchanged SSZ-13 up to 600oC. The NO oxidation activity of Cu-SSZ-13 was found to be low regardless of Cu loading, although it was somewhat improved with increasing Cu ion exchange level at high temperatures. During the “fast” SCR (i.e., NO/NO2 =1), only a slight improvement in NOx reduction activity was obtained for Cu-SSZ-13. Regardless of Cu loading, near 100% selectivity to N2 was observed; only a very small amount of N2O was produced even in the presence of NO2. Based on the Cu loading, the apparent activation energies for NO oxidation and NO SCR were estimated to be ~58 kJ/mol and ~41 kJ/mol, respectively.

  4. Building Selectivity for NO Sensing in a NOx Mixture with Sonochemically Prepared CuO Structures

    Directory of Open Access Journals (Sweden)

    Max R. Mullen

    2015-12-01

    Full Text Available Several technologies are available for decreasing nitrogen oxide (NOx emissions from combustion sources, including selective catalytic reduction methods. In this process, ammonia reacts with nitric oxide (NO and nitrogen dioxide (NO2. As the stoichiometry of the two reactions is different, electrochemical sensor systems that can distinguish between NO and NO2 in a mixture of these two gases are of interest. Since NO and NO2 can be brought to equilibrium, depending on the temperature and the surfaces that they are in contact with, the detection of NO and NO2 independently is a difficult problem and has not been solved to date. In this study, we explore a high surface area sonochemically prepared CuO as the resistive sensing medium. CuO is a poor catalyst for NOx equilibration, and requires temperatures of 500 C to bring about equilibration. Thus, at 300 C, NO and NO2 retain their levels after interaction with CuO surface. In addition, NO adsorbs more strongly on the CuO over NO2. Using these two concepts, we can detect NO with minimal interference from NO2, if the latter gas concentration does not exceed 20% in a NOx mixture over a range of 100–800 ppm. Since this range constitutes most of the range of total NOx concentrations in diesel and other lean burn engines, this sensor should find application in selective detection of NO in this combustion application. A limitation of this sensor is the interference with CO, but with combustion in excess air, this problem should be alleviated.

  5. Selective separation of Cu (II), Zn (II), and Cd (II) by solvent extraction

    Institute of Scientific and Technical Information of China (English)

    XIE Keng; WEN Jiankang; HUA Yixin; RUAN Renman

    2008-01-01

    An experimental investigation was presented on the separation of Cu (II), Zn (II), and Cd (II) from a rich sulfate leachate of zinc slag by solvent extraction. The results of orthogonal experiments indicate that LIX 984N is highly selective and very efficient in the extraction of Cu (II), and the analysis of variance indicates that the sequence of parameters according to their influence on the separation efficiency is phase ratio>LIX 984N concentration>pH value>extraction time. The optimal condition for copper extraction is obtained as 25% of LIX 984N concentration, 7 min of extraction time, 3:2 of phase ratio O/A, and pH=1.7. The separation of Zn (II) and Cd (II) was performed after the copper extraction from the raffinate. Comparative analysis of the separation with di-2-ethylhexyl phosphoric acid (D2EHPA), D2EHPA-tributyl-phosophate (TBP) synergistic extracting system, and 2-ethylhexyl phosphonic acid mono 2-ethylhexyl ester (HEHEHP) was made at pH=2.0. It is demonstrated that the extraction efficiency with D2EHPA is improved after being saponified by sodium hydroxide, and D2EHPA-TBP synergistic extracting, as well as HEHEHP, has a superior selectivity to Zn (II) over Cd (II).

  6. Phosphorescent Chemosensor Based on Iridium(III) Complex for the Selective Detection of Cu(II) Ion in Aqueous Acetonitrile

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Hyebin; Li, Yinan; Hyun, Myungho [Pusan National Univ., Busan (Korea, Republic of)

    2013-02-15

    Iridium(III) complex 1 containing two cyclo-metalating 2-phenylpyridine (ppy) ligands and one 2,2'-bipyridine ligand tethered with two DPA moieties by a methylene linker was prepared. Iridium(III) complex 1 was found to form 1:2 complex selectively with Cu(II) ion with the Stern-Volmer constant of 5.8 Χ 10{sup 4} M{sup -1}. Cu(II) ion has two sides. In one side, Cu(II) ion is an important cofactor in nearly 20 metalloenzymes and an essential micronutrient for all living systems. But, in other side, Cu(II) ion is one of significant metal pollutants and toxic to living cells if present in slightly high concentrations, causing neurodegenerative diseases such as Menkes and Wilson's disease. In this instance, the selective detection of Cu(II) ion in environment and in living systems is very important. Consequently, various fluorescent chemosensors for the highly sensitive and selective detection of Cu (II) ion have been developed.

  7. Determining the storage, availability and reactivity of NH3 within Cu-Chabazite-based Ammonia Selective Catalytic Reduction systems.

    Science.gov (United States)

    Lezcano-Gonzalez, I; Deka, U; Arstad, B; Van Yperen-De Deyne, A; Hemelsoet, K; Waroquier, M; Van Speybroeck, V; Weckhuysen, B M; Beale, A M

    2014-01-28

    Three different types of NH3 species can be simultaneously present on Cu(2+)-exchanged CHA-type zeolites, commonly used in Ammonia Selective Catalytic Reduction (NH3-SCR) systems. These include ammonium ions (NH4(+)), formed on the Brønsted acid sites, [Cu(NH3)4](2+) complexes, resulting from NH3 coordination with the Cu(2+) Lewis sites, and NH3 adsorbed on extra-framework Al (EFAl) species, in contrast to the only two reacting NH3 species recently reported on Cu-SSZ-13 zeolite. The NH4(+) ions react very slowly in comparison to NH3 coordinated to Cu(2+) ions and are likely to contribute little to the standard NH3-SCR process, with the Brønsted groups acting primarily as NH3 storage sites. The availability/reactivity of NH4(+) ions can be however, notably improved by submitting the zeolite to repeated exchanges with Cu(2+), accompanied by a remarkable enhancement in the low temperature activity. Moreover, the presence of EFAl species could also have a positive influence on the reaction rate of the available NH4(+) ions. These results have important implications for NH3 storage and availability in Cu-Chabazite-based NH3-SCR systems.

  8. A new perylene diimide-based colorimetric and fluorescent sensor for selective detection of Cu2+ cation

    Institute of Scientific and Technical Information of China (English)

    YAN LiWei; YANG Li; LAN JingBo; YOU JingSong

    2009-01-01

    A new perylene diimide (PDI) ligand (1) functionalized with a dipicolylethylenediamine (DPEN) moiety was synthesized and first used as a colorimetric and fluorometric dual-channel sensor to specifically detect the presence of Cu2+ over a wide range of other cations. The solution of 1 (10 μmol/L) upon ad-dition of Cu2+ displayed distinguishing pink color compared with other cations including K+, Ni2+, Ca2+,Mn2+, Na+, Sr2+, Zn2+, Co2+, Cd2+, Mg2+, Cr3+, Ag2+, and Ba2+, indicating the sensitivity and selectivity of 1 to Cu2+. Thus, the advantage of this assay is that naked-eye detection of Cu2+ becomes possible. More-over, among these metal ions investigated, only Cu2+ quenched more than half fluorescent intensity of 1. The ESI-TOF spectrum of a mixture of I and CuCl2 in combination of the fluorescence titration spec-tra of 1 (10 μmol/L) upon addition of various amounts of Cu2+ revealed the formation of a 2:1 metal-ligand complex through the metal coordination interaction.

  9. A new perylene diimide-based colorimetric and fluorescent sensor for selective detection of Cu2+ cation

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    A new perylene diimide (PDI) ligand (1) functionalized with a dipicolylethylenediamine (DPEN) moiety was synthesized and first used as a colorimetric and fluorometric dual-channel sensor to specifically detect the presence of Cu2+ over a wide range of other cations. The solution of 1 (10 μmol/L) upon ad-dition of Cu2+ displayed distinguishing pink color compared with other cations including K+,Ni2+,Ca2+,Mn2+,Na+,Sr2+,Zn2+,Co2+,Cd2+,Mg2+,Cr3+,Ag+,and Ba2+,indicating the sensitivity and selectivity of 1 to Cu2+. Thus,the advantage of this assay is that naked-eye detection of Cu2+ becomes possible. More-over,among these metal ions investigated,only Cu2+ quenched more than half fluorescent intensity of 1. The ESI-TOF spectrum of a mixture of 1 and CuCl2 in combination of the fluorescence titration spectra of 1 (10 μmol/L) upon addition of various amounts of Cu2+ revealed the formation of a 2︰1 metal-ligand complex through the metal coordination interaction.

  10. Coumarin-based 'turn-off' fluorescent chemosensor with high selectivity for Cu2+ in aqueous solution

    Science.gov (United States)

    Xu, Wen-Jun; Qi, De-Qiang; You, Jin-Zong; Hu, Fei-Fei; Bian, Jia-Ying; Yang, Chun-Xia; Huang, Juan

    2015-07-01

    Coumarin-based "turn-off" fluorescent chemosensor, 3-acetoacetyl-7-diethylaminocoumarin (1), has been synthesized and structurally characterized by IR, 1H NMR and X-ray crystal structure analysis. The fluorescence behaviors in the presence of various metal ions were investigated in aqueous media. 1 Exhibits highly selective and sensitive absorbance and fluorescence sensing ability for Cu2+ over other metal ions. Addition of Cu2+ to the aqueous solution of 1 gave rise to obvious absorbance change and fluorescence quenching. Other competing ions, such as Mg2+, Ba2+, Mn2+, Fe3+, Co2+, Ni2+, Zn2+, Pb2+, Cd2+, Hg2+, induced negligible absorbance and fluorescence changes under the same conditions. The job's plot showed that the stoichiometry between 1 and Cu2+ was estimated to be 1:1. The fluorescence intensity varied almost linearly vs. the concentration of Cu2+ (1.0-7.0 μM), and the detection limit of Cu2+ was estimated to be 1.81 nM, indicating that 1 can be used as "turn-off" fluorescent chemosensor to selectively detect Cu2+ in aqueous solution.

  11. Cu-Mo2C/MCM-41: An Efficient Catalyst for the Selective Synthesis of Methanol from CO2

    Directory of Open Access Journals (Sweden)

    Xiaoran Liu

    2016-05-01

    Full Text Available Supported molybdenum carbide (yMo2C/M41 and Cu-promoted molybdenum carbide, using a mechanical mixing and co-impregnation method (xCuyMo2C/M41-M and xCuyMo2C/M41-I on a mesoporous molecular sieve MCM-41, were prepared by temperature-programmed carburization method in a CO/H2 atmosphere at 1073 K, and their catalytic performances were tested for CO2 hydrogenation to form methanol. Both catalysts, which were promoted by Cu, exhibited higher catalytic activity. In comparison to 20Cu20Mo2C/M41-M, the 20Cu20Mo2C/M41-I catalyst exhibited a stronger synergistic effect between Cu and Mo2C on the catalyst surface, which resulted in a higher selectivity for methanol in the CO2 hydrogenation reaction. Under the optimal reaction conditions, the highest selectivity (63% for methanol was obtained at a CO2 conversion of 8.8% over the 20Cu20Mo2C/M41-I catalyst.

  12. A rhodamine chromene-based turn-on fluorescence probe for selectively imaging Cu²+ in living cell.

    Science.gov (United States)

    Liu, Wei-Yong; Li, Hai-Ying; Lv, Hong-Shui; Zhao, Bao-Xiang; Miao, Jun-Ying

    2012-09-01

    We describe the development of a rhodamine chromene-based turn-on fluorescence probe to monitor the intracellular Cu(2+) level in living cells. The new fluorescent probe with a chlorine group in chromene moiety exhibits good membrane-permeable property than previous reported because the predicted lipophilicity of present probe 4 is stronger than that of methoxyl substituted probe in our previous work (CLogP of 4: 8.313, CLogP of methoxyl substituted probe: 7.706), and a fluorescence response toward Cu(2+) under physiological conditions with high sensitivity and selectivity, and facilitates naked-eye detection of Cu(2+). The fluorescence intensity was remarkably increased upon the addition of Cu(2+) within 1 or 2 min, while the other sixteen metal ions caused no significant effect. Copyright © 2012 Elsevier B.V. All rights reserved.

  13. Development of Fluorescent Turn-On Sensor for Selective Detection of Cu{sup 2+} in Aqueous Solution

    Energy Technology Data Exchange (ETDEWEB)

    Li, XiaoLiang; He, Yongwu; Ahn, Kyungil; Yang, Sung Ik [Kyung Hee Univ., Yongin (Korea, Republic of)

    2013-06-15

    Cu{sup 2+} is one of the most essential metal ions in biological systems, since it plays an important role in numerous biological processes and can induce various disorders, including some neurodegenerative diseases such as Alzhemer's, Prion, and Parkinson's diseases. In conclusion, we have developed a novel chemodosimeter for RhMS by covalent coupling of rhodamine with meso-porous SiO{sub 2} and characterized as a fluorescent sensor for Cu{sup 2+}. The RhMS showed a high sensitivity and selectivity toward the Cu{sup 2+} ions over other metal ions in an aqueous solution. Upon addition of the Cu{sup 2+}, the RhMS underwent a hydrolysis reaction and ring opening process, which increased the fluorescence intensity by a factor of 1,000 and changed the color from colorless to pink.

  14. First Principles Study of Dopant Site Selectivity in Ordered Perovskite CaCu3Ti4O12

    Institute of Scientific and Technical Information of China (English)

    XU Li-Chun; WANG Ru-Zhi; DENG Yang; YAN Hui

    2011-01-01

    We investigate the dopant site selectivity of CaCu3Ti4O12(CCTO) using the first principles calculations. Our results show that, for four cases of possible occupancy by La atom, lattice expansions and formation enthalpies with different dopant quantities indicate that doped La cations are preferentially substituted for Ca sites in CaCu3Ti4O12, which is excellent in agreement with the experimental observation(Choi et al. Adv. Mater. 21 (2009) 885).Furthermore, more interesting information of doping is also explored by the analysis of density of states and it is found that La substituting for Cu may advance the electron conduction in CCTO. It supplies a potential solution for limitations of CCTO devices by exploring the effect when La substitutes for Cu sites in the CCTO crystal.

  15. Direct manufacturing of Cu-based alloy parts by selective laser melting

    Institute of Scientific and Technical Information of China (English)

    Weihui Wu; Yongqiang Yang; Yanlu Huang

    2007-01-01

    The frequent defects of the metal parts, such as non-fully melting, thermal strain, and balling, which are produced by selective laser melting (SLM) that is a novel method of one-step manufacturing, are analyzed theoretically and experimentally. The processing parameters significantly affect the quality of the final parts, and simultaneously, the appropriate laser mode and the special scanning strategy assure a satisfying quality of the final parts. The SLM experiment is carried out using Cu-based powder. The metal part is divided into several scanned regions, each of which is scanned twice at the cross direction with different scanning speeds. The microstructure is analyzed on microscope. The results show that the part is metallurgically bonded entity with a relative density of 95%, and the microstructure is composed of equiaxial crystal and dendritic crystal whose distributions are mainly decided by the scanning strategy.

  16. Fluorescence Lifetime Imaging of Physiological Free Cu(II) Levels in Live Cells with a Cu(II)-Selective Carbonic Anhydrase-Based Biosensor

    Science.gov (United States)

    McCranor, Bryan J.; Szmacinski, Henryk; Zeng, Hui Hui; Stoddard, A.K.; Hurst, Tamiika; Fierke, Carol A.; Lakowicz, J.R.

    2014-01-01

    Copper is a required trace element that plays key roles in a number of human enzymes, such that copper deficiency or genetic defects in copper transport lead to serious or fatal disease. Rae, et al., had famously predicted that free copper ion levels in the cell cytoplasm were extremely low, typically too low to be observable. We recently developed a variant of human apocarbonic anhydrase II for sensing metal ions that exhibits 25-fold better selectivity for Cu(II) over Zn(II) than the wild type protein, enabling us to accurately measure Cu(II) in the presence of ordinary cellular (picomolar) concentrations of free zinc. We inserted a fluorescent labeled Cu(II)-specific variant of human apocarbonic anhydrase into PC-12 cells and found that the levels are indeed extremely low (in the femtomolar range). We imaged the free Cu(II) levels in living cells by means of frequency-domain fluorescence lifetime microscopy. Implications of this finding are discussed. PMID:24671220

  17. Divergent kinetic and thermodynamic hydration of a porous Cu(II) coordination polymer with exclusive CO₂ sorption selectivity.

    Science.gov (United States)

    Du, Miao; Li, Cheng-Peng; Chen, Min; Ge, Zhi-Wei; Wang, Xi; Wang, Lei; Liu, Chun-Sen

    2014-08-06

    Selective adsorption and separation of CO2 are of great importance for different target applications. Metal-organic frameworks (MOFs) represent a promising class of porous materials for this purpose. Here we present a unique MOF material, [Cu(tba)2]n (tba = 4-(1H-1,2,4-triazol-1-yl)benzoate), which shows high CO2 adsorption selectivity over CH4/H2/O2/Ar/N2 gases (with IAST selectivity of 41-68 at 273 K and 33-51 at 293 K). By using a critical point dryer, the CO2 molecules can be well sealed in the 1D channels of [Cu(tba)2]n to allow a single-crystal X-ray analysis, which reveals the presence of not only C(δ+)-H···O(δ-) bonds between the host framework and CO2 but also quadrupole-quadrupole (CO2(δ-)···(δ+)CO2) interactions between the CO2 molecules. Furthermore, [Cu(tba)2]n will suffer divergent kinetic and thermodynamic hydration processes to form its isostructural hydrate {[Cu(tba)2](H2O)}n and a mononuclear complex [Cu(tba)2(H2O)4] via single-crystal to single-crystal transformations.

  18. Vaccination against seasonal influenza: a reminder

    CERN Document Server

    GS Department

    2011-01-01

    At this time every year the Medical Service suggests that you should get vaccinated against seasonal flu. We would like to remind you that vaccination is the best method of protecting yourself and others against this contagious illness which can have serious consequences for certain people, especially those suffering from chronic medical conditions (e.g. chronic pulmonary, cardiovascular or kidney disease or diabetes), pregnant women, people suffering from obesity (BMI>30) and those over 65. As the Medical Service does not supply the vaccine, you must purchase it from a pharmacy (in France without the need for a prescription). From the beginning of October you can then bring your vaccine to the Infirmary (Building 57-Ground floor) and get vaccinated without an appointment between 9 a.m. and 12 a.m. and 2 p.m. to 4:30 p.m. For the purposes of health insurance reimbursement, you can get a prescription from the Medical Service either on the day of the injection or beforehand. Reminder: The Medical Se...

  19. Vaccination against seasonal influenza: a reminder

    CERN Document Server

    Medical Service

    2013-01-01

    At this time every year, the Medical Service suggests that you should get vaccinated against seasonal flu.   We would like to remind you that vaccination is the best method of protecting yourself and others against this contagious illness which can have serious consequences for certain people, especially those suffering from chronic medical conditions (e.g. chronic pulmonary, cardiovascular or kidney disease or diabetes), pregnant women, people suffering from obesity (BMI>30) and those over 65. As the Medical Service does not supply the vaccine, you must purchase it from a pharmacy (without the need for a prescription in France). From the beginning of October you can then bring your vaccine to the Infirmary (Building 57-Ground floor) and get vaccinated without an appointment between 9 a.m. - 12 p.m. and 2 p.m. - 4:30 p.m. For the purposes of health insurance reimbursement, you can get a prescription from the Medical Service either on the day of the injection or beforehand. Reminder: The...

  20. Vaccination against seasonal influenza: a reminder

    CERN Multimedia

    2012-01-01

    At this time every year the Medical Service suggests that you should get vaccinated against seasonal flu.   We would like to remind you that vaccination is the best method of protecting yourself and others against this contagious illness which can have serious consequences for certain people, especially those suffering from chronic medical conditions (e.g. chronic pulmonary, cardiovascular or kidney disease or diabetes), pregnant women, people suffering from obesity (BMI>30) and those over 65. As the Medical Service does not supply the vaccine, you must purchase it from a pharmacy (in France you don't need a prescription). From the beginning of October you can then bring your vaccine to the Infirmary (Building 57-Ground floor) and get vaccinated without an appointment between 9 a.m. and 12 a.m. and 2 p.m. to 4:30 p.m. For the purposes of health insurance reimbursement, you can get a prescription from the Medical Service either on the day of the injection or beforehand. Reminder:...

  1. Pd@Cu(II)-MOF-Catalyzed Aerobic Oxidation of Benzylic Alcohols in Air with High Conversion and Selectivity.

    Science.gov (United States)

    Chen, Gong-Jun; Wang, Jing-Si; Jin, Fa-Zheng; Liu, Ming-Yang; Zhao, Chao-Wei; Li, Yan-An; Dong, Yu-Bin

    2016-03-21

    A new 3D porous Cu(II)-MOF (1) was synthesized based on a ditopic pyridyl substituted diketonate ligand and Cu(OAc)2 in solution, and it features a 3D NbO motif which is determined by the X-ray crystallography. Furthermore, the Pd NPs-loaded hybrid material Pd@Cu(II)-MOF (2) was prepared based on 1 via solution impregnation, and its structure was confirmed by HRTEM, SEM, XRPD, gas adsorption-desorption, and ICP measurement. 2 exhibits excellent catalytic activity (conversion, 93% to >99%) and selectivity (>99% to benzaldehydes) for various benzyl alcohol substrates (benzyl alcohol and its derivatives with electron-withdrawing and electron-donating groups) oxidation reactions in air. In addition, 2 is a typical heterogeneous catalyst, which was confirmed by hot solution leaching experiment, and it can be recycled at least six times without significant loss of its catalytic activity and selectivity.

  2. Increasing health examination survey participation rates by SMS reminders and flexible examination times.

    Science.gov (United States)

    Tolonen, Hanna; Aistrich, Anna; Borodulin, Katja

    2014-11-01

    Declining participation rates are an increasing problem in population surveys. Different kinds of methods have been used to ensure participation rates as high as possible. Monetary incentives and reminders have been found to be effective ways to increase participation rates, but these are rather expensive to implement in large population surveys. There is a need for cheaper ways to motivate survey invitees to participate. The Kuusamo Health Examination Survey was conducted in May-June 2011. A random sample of 250 people was selected for the survey. Mobile phone numbers, when available, were obtained for people within the sample. For a random sample of 50% of survey invitees with a mobile phone number, a short message service (SMS) reminder was sent prior to their appointment. All survey participants were asked to fill in a feedback questionnaire. Participation rate was 58% for men and 74% for women. Mobile phone numbers were available for 66% of the sample. Among those receiving an SMS reminder about their appointment, participation rates were up to 25 percentage points higher than among the group not receiving a reminder. In the feedback questionnaire, 9% of the survey participants reported that they would not have participated without the SMS reminder they received. Participants preferred morning hours and Monday-Tuesday as time and day options for the examinations. SMS reminder about the appointment time was an effective way to increase participation rate, especially among the youngest age groups also, providing flexible office hours for the examination clinic may increase participation rate. © 2014 the Nordic Societies of Public Health.

  3. Selective detection of Cu(2+) and Co(2+) in aqueous media: Asymmetric chemosensors, crystal structure and spectroscopic studies.

    Science.gov (United States)

    Dogaheh, Samira Gholizadeh; Khanmohammadi, Hamid; Carolina Sañudo, E

    2017-02-08

    Two new azo-azomethine receptors, H2L(1) and H2L(2), containing hydrazine, naphthalene and different electron withdrawing groups, Cl and NO2, have been designed and synthesized for qualitative and quantitative detection of Cu(2+) and Co(2+) in aqueous media. The crystal structure of H2L(1)is reported. The H2L(1)was used as a chemosensor for selective detection of trace amount of Cu(2+) in aqueous media. H2L(2) was also applied to naked-eye distinction of Cu(2+) and Co(2+) from other transition metal ions in aqueous media. Detection limit of Cu(2+) is 1.13μM and 1.26μM, in water, for H2L(1) and H2L(2), respectively, which are lower than the World Health Organization (WHO) recommended level. The binuclear Cu(2+) and Co(2+) complexes of the receptors have been also prepared and characterized using spectroscopic methods and MALDI-TOF mass analysis. Furthermore, the binding stoichiometry between the receptors upon the addition Cu(2+) and Co(2+) has been investigated using Job's plot. Moreover, the fluorescence emission spectra of the receptors and their metal complexes are also reported.

  4. Selective detection of Cu2 + and Co2 + in aqueous media: Asymmetric chemosensors, crystal structure and spectroscopic studies

    Science.gov (United States)

    Dogaheh, Samira Gholizadeh; Khanmohammadi, Hamid; Carolina Sañudo, E.

    2017-05-01

    Two new azo-azomethine receptors, H2L1 and H2L2, containing hydrazine, naphthalene and different electron withdrawing groups, Cl and NO2, have been designed and synthesized for qualitative and quantitative detection of Cu2 + and Co2 + in aqueous media. The crystal structure of H2L1is reported. The H2L1was used as a chemosensor for selective detection of trace amount of Cu2 + in aqueous media. H2L2 was also applied to naked-eye distinction of Cu2 + and Co2 + from other transition metal ions in aqueous media. Detection limit of Cu2 + is 1.13 μM and 1.26 μM, in water, for H2L1 and H2L2, respectively, which are lower than the World Health Organization (WHO) recommended level. The binuclear Cu2 + and Co2 + complexes of the receptors have been also prepared and characterized using spectroscopic methods and MALDI-TOF mass analysis. Furthermore, the binding stoichiometry between the receptors upon the addition Cu2 + and Co2 + has been investigated using Job's plot. Moreover, the fluorescence emission spectra of the receptors and their metal complexes are also reported.

  5. Confirmation of Isolated Cu2+ Ions in SSZ-13 Zeolite as Active Sites in NH3-Selective Catalytic Reduction

    NARCIS (Netherlands)

    Deka, U.; Juhin, A.F.; Eilertsen, E.A.; Emerich, H.; Green, M.A.; Korhonen, S.T.; Weckhuysen, B.M.; Beale, A.M.

    2012-01-01

    NH3-Selective Catalytic Reduction (NH3-SCR) is a widely used technology for NOx reduction in the emission control systems of heavy duty diesel vehicles. Copper-based ion exchanged zeolites and in particular Cu-SSZ-13 (CHA framework) catalysts show both exceptional activity and hydrothermal stability

  6. Modular structure of a robust microporous MOF based on Cu2 paddle-wheels with high CO2 selectivity.

    Science.gov (United States)

    Seco, José M; Fairen-Jimenez, David; Calahorro, Antonio J; Méndez-Liñán, Laura; Pérez-Mendoza, Manuel; Casati, Nicola; Colacio, Enrique; Rodríguez-Diéguez, Antonio

    2013-12-14

    The synthesis of a new MOF with Cu2 paddle-wheels connected to glutarate and 1,3-bis(4-pyridyl)propane linkers has been explored. Experimental gas adsorption measurements reveal that the MOF is essentially non-porous to methane whereas it presents a type III isotherm upon CO2 adsorption, leading to high capacity and outstanding CO2 selectivity.

  7. Electrochemical CO2 reduction on Cu2O-derived copper nanoparticles: Controlling the catalytic selectivity of hydrocarbons

    NARCIS (Netherlands)

    Kas, Recep; Kortlever, R.; Milbrat, Alexander; Koper, M.T.M.; Mul, Guido; Baltrusaitis, Jonas

    2014-01-01

    The catalytic activity and hydrocarbon selectivity in electrochemical carbon dioxide (CO2) reduction on cuprous oxide (Cu2O) derived copper nanoparticles is discussed. Cuprous oxide films with [100], [110] and [111] orientation and variable thickness were electrodeposited by reduction of copper(II)

  8. Is performance in task-cuing experiments mediated by task set selection or associative compound retrieval?

    Science.gov (United States)

    Forrest, Charlotte L D; Monsell, Stephen; McLaren, Ian P L

    2014-07-01

    Task-cuing experiments are usually intended to explore control of task set. But when small stimulus sets are used, they plausibly afford learning of the response associated with a combination of cue and stimulus, without reference to tasks. In 3 experiments we presented the typical trials of a task-cuing experiment: a cue (colored shape) followed, after a short or long interval, by a digit to which 1 of 2 responses was required. In a tasks condition, participants were (as usual) directed to interpret the cue as an instruction to perform either an odd/even or a high/low classification task. In a cue + stimulus → response (CSR) condition, to induce learning of mappings between cue-stimulus compound and response, participants were, in Experiment 1, given standard task instructions and additionally encouraged to learn the CSR mappings; in Experiment 2, informed of all the CSR mappings and asked to learn them, without standard task instructions; in Experiment 3, required to learn the mappings by trial and error. The effects of a task switch, response congruence, preparation, and transfer to a new set of stimuli differed substantially between the conditions in ways indicative of classification according to task rules in the tasks condition, and retrieval of responses specific to stimulus-cue combinations in the CSR conditions. Qualitative features of the latter could be captured by an associative learning network. Hence associatively based compound retrieval can serve as the basis for performance with a small stimulus set. But when organization by tasks is apparent, control via task set selection is the natural and efficient strategy.

  9. Surface ion-imprinted amino-functionalized cellulosic cotton fibers for selective extraction of Cu(II) ions.

    Science.gov (United States)

    Monier, M; Ibrahim, Amr A; Metwally, M M; Badawy, D S

    2015-11-01

    Surface ion-imprinted amino-functionalized cellulosic fibers (Cu-ABZ) were manufactured for efficient selective adsorption of Cu(2+) ions. The chemical modification steps had been characterized utilizing elemental analysis; Fourier transforms infrared (FTIR) along with wide angle X-ray diffraction (XRD) spectroscopy. Also, the morphological structure of the ion-imprinted and the non-imprinted (NI-ABZ) fibers were visualized and compared with that of the native cotton fibers using scanning electron microscope (SEM). In addition, the coordination mode by which the Cu(2+) ions bonded to the active sites were examined by both FTIR and X-ray photo electron spectra (XPS). Both Cu-ABZ and NI-ABZ were implemented in batch experiments for optimizing the conditions by which the Cu(2+) ions can be selectively removal from aqueous medium and pH 5 was the optimum for the metal ion extraction. Moreover, the kinetics and isotherm studies revealed that the adsorption data fitted with pseudo-second-order kinetic and Langmuir models with estimated maximum adsorption capacity 93.6mg/g. Also, the reusability studies indicated that the prepared ion-imprinted adsorbent maintains more than 95% of its original activity after fifth generation cycle.

  10. Underpotential Co-deposition of Au-Cu alloys: switching the underpotentially deposited element by selective complexation.

    Science.gov (United States)

    Liang, Defu; Zangari, Giovanni

    2014-03-11

    Underpotential deposition and monolayer replacement processes are widely used for the synthesis of core/shell catalysts and heterointerfaces. Conventionally, only the more noble metal can be underpotentially deposited on or replace the less noble metal, limiting the number of accessible material configurations. We show here that the reverse process is possible, using the Au-Cu pair as a model system. By tuning the redox potentials of the two components via use of strong, selective metal ion complexes, Au-Cu alloys could be synthesized at will by (i) conventional underpotential co-deposition, whereby Cu is reduced at underpotential in parallel with the overpotential deposition of Au, or (ii) the reverse process, where Au is reduced at underpotential, while Cu is deposited at overpotential. Selective complexation also draws the redox potential of Au and Cu closer, resulting in co-deposition under activation control for the noble metal and precise alloy composition control by the applied potential, enabling in principle the formation of arbitrary metal or alloy interfaces. The alloys resulting from the two processes exhibit distinct enthalpy of mixing, suggesting different degrees of short-range order and dissimilar atomic configurations. These findings open new perspectives on underpotential deposition phenomena and possibly new synthetic opportunities in electrodeposition.

  11. Text messaging is a useful reminder tool.

    Science.gov (United States)

    Balzer, Ben W R; Kelly, Patrick J; Hazell, Philip; Paxton, Karen; Hawke, Catherine; Steinbeck, Katharine S

    2014-07-01

    Longitudinal studies of adolescents must be 'adolescent-friendly', to collect data and to encourage maintenance in the study cohort. Text messaging may offer a feasible means to do both. Adolescents in the Adolescent Rural Cohort, Hormones and Health, Education, Environments and Relationships (ARCHER) study (n=342) are sent automated text messages every 3 months, prompting biological specimen collection. A total of 99.2% of participants (or their parents) owned a mobile phone, of which 89.1% of participants responded to text messages and 97.3% of intended urine samples were collected. The average time to provide a urine sample after prompting correlated with time to reply to Short Message Service (SMS). This study shows SMS can be used effectively in longitudinal research involving adolescents and is feasible and useful as a reminder tool for regular biological specimen collection.

  12. Electronic reminding technology for cognitive impairment.

    Science.gov (United States)

    Mason, Sarah; Craig, David; O'Neill, Sonia; Donnelly, Mark; Nugent, Chris

    Demographic changes highlight the need to address disabilities associated with the costly morbidities of old age, such as dementia. Memory impairment associated with dementia represents a significant challenge for many older people. Difficulties occur in carrying out activities in their entirety or in commencing them at all. Technology has the potential to help individuals overcome the barriers created by cognitive disability in terms of performing activities of daily living and therefore help to maintain independence and enhance quality of life (Czaja, 2005). This literature review examines the current reported research, which employs electronic reminding technology to support individuals with cognitive impairment. These devices range from everyday technologies, such as phones, to sophisticated interactive devices with specifically designed software. A summary of the current evidence base is presented and recommendations for future practice are made.

  13. High performance CuO-CeO_2 catalysts for selective oxidation of CO in excess hydrogen: Effect of hydrothermal preparation conditions

    Institute of Scientific and Technical Information of China (English)

    Pengfei Zhu; Jing Li; Qinqin Huang; Siming Yan; Mei Liu; Renxian Zhou

    2009-01-01

    High performance CuO-CeO_2 catalysts for selective oxidation of CO in excess hydrogen were prepared by a hydrothermal method under different preparation conditions and evaluated for catalytic activities and selectivities. By changing the nCTAB/nCe ratio and hydrothermal aging time,the catalytic activity of the CuO-CeO_2 catalysts increased and the operating temperature window,in which the CO conversion was higher than 99%,was widened. XRD results showed no peaks of CuOx species and Cu-Ce-O solid solution were observed. On the other hand,Cu+ species in the CuO-CeO_2 catalysts,which was associated with a strong interaction between copper oxide clusters and cerium oxide and could be favorable for improving the selective oxidation performance of CO in excess H2,were detected by H2-TPR and XPS techniques.

  14. Click-generated triazole based ferrocene-carbohydrate bioconjugates: A highly selective multisignalling probe for Cu(II) ions

    Indian Academy of Sciences (India)

    Arunabha Thakur; Sinjinee Sardar; Sundargopal Ghosh

    2012-11-01

    Two Cu2+-specific colorimetric sensors, based on ferrocene-carbohydrate bioconjugates, 2, C46H56O20N6Fe and 3, C28H33O10N3Fe were designed and synthesized in good yields. Both the compounds, 2 and 3, behave as very selective and sensitive chromogenic and electrochemical chemosensor for Cu2+ ion in aqueous environment (CH3CN/H2O (2:8, /). The analytical detection limit (ADL) for receptor 2 was 7.5 × 10−7 M. The considerable changes in their absorption spectra of 2 and 3 are accompanied by the appearance of a new low energy (LE) peak at 630 nm (2: = 1600 M-1 cm-1 and 3: 822 M-1 cm-1). This is further accompanied by a strong colour change from yellow to dark green that allows the prospective for `naked eye’ detection of Cu2+ ion.

  15. A new luminescent lanthanide supramolecular network possessing free Lewis base sites for highly selective and sensitive Cu(2+) sensing.

    Science.gov (United States)

    Chu, Tianshu; Hu, Yunsong; Wu, Jinlun; Zeng, Chenghui; Yang, Yangyi; Ng, Seik Weng

    2016-06-08

    A series of new lanthanide complexes, formulated as [Ln2(DCSAL)3(H2O)11]·3DCSAL·4H2O [Ln = Eu (1), Gd (2) and Tb (3); DCSAL = 3,5-dichlorosalicylate], have been synthesized and characterized by single crystal X-ray analysis. They are dinuclear clusters and form a 3D supramolecular network viaπ-π stacking and halogen bonding interactions. 3 exhibits strong Tb characteristic emission, whose quantum yield is as high as 38%. Due to binding with Cu(2+) ions via its Lewis acid-base interactions, 3 displayed a high selectivity and sensitivity for Cu(2+) detection based on Tb(3+) emission quenching. The possible quenching mechanism was further proved to be a static quenching mechanism by Stern-Volmer plots and UV-vis spectrum. More importantly, the binding constant between 3 and Cu(2+) is also calculated by the Benesi-Hildebrand method, which is helpful for quantitative analysis.

  16. Preparation of Cu(2+)-mediated magnetic imprinted polymers for the selective sorption of bovine hemoglobin.

    Science.gov (United States)

    Gao, Ruixia; Cui, Xihui; Hao, Yi; He, Gaiyan; Zhang, Min; Tang, Yuhai

    2016-04-01

    In this work, a novel Cu(2+)-mediated core-shell bovine hemoglobin imprinted superparamagnetic polymers were synthesized. First, carboxyl group directly-functionalized Fe3O4 nanoparticles were produced by a facile one-pot hydrothermal method. Next, copper ions were introduced to chelate with carboxyl groups and further bonded with template bovine hemoglobin as co-functional monomer. Then, functional monomers 3-aminopropyltriethoxylsilane and octyltrimethoxysilane were adopted to form the thin polymer layers. Finally, after removal of the templates, the imprinting shells with specific recognition cavities for bovine hemoglobin were obtained on Fe3O4 nanoparticles. The resultant molecularly imprinted polymers have high adsorption capacity and satisfactory selectivity for bovine hemoglobin with the help of copper ions. The obtained magnetic nanomaterials were characterized by transmission electron microscopy, Fourier-transform infrared spectra, X-ray diffraction, and vibrating sample magnetometer. The measurements demonstrated that the as-synthesized nanomaterials exhibited good dispersion, high crystallinity, and satisfactory superparamagnetic properties. The feasibility of this method was further confirmed by using the imprinted nanomaterials to specifically extract bovine hemoglobin from real bovine blood samples.

  17. A Cu²⁺-selective fluorescent chemosensor based on BODIPY with two pyridine ligands and logic gate.

    Science.gov (United States)

    Huang, Liuqian; Zhang, Jing; Yu, Xiaoxiu; Ma, Yifan; Huang, Tianjiao; Shen, Xi; Qiu, Huayu; He, Xingxing; Yin, Shouchun

    2015-06-15

    A novel near-infrared fluorescent chemosensor based on BODIPY (Py-1) has been synthesized and characterized. Py-1 displays high selectivity and sensitivity for sensing Cu(2+) over other metal ions in acetonitrile. Upon addition of Cu(2+) ions, the maximum absorption band of Py-1 in CH3CN displays a red shift from 603 to 608 nm, which results in a visual color change from pink to blue. When Py-1 is excited at 600 nm in the presence of Cu(2+), the fluorescent emission intensity of Py-1 at 617 nm is quenched over 86%. Notably, the complex of Py-1-Cu(2+) can be restored with the introduction of EDTA or S(2-). Consequently, an IMPLICATION logic gate at molecular level operating in fluorescence mode with Cu(2+) and S(2-) as chemical inputs can be constructed. Finally, based on the reversible and reproducible system, a nanoscale sequential memory unit displaying "Writing-Reading-Erasing-Reading" functions can be integrated. Copyright © 2015 Elsevier B.V. All rights reserved.

  18. Is Performance in Task-Cuing Experiments Mediated by Task Set Selection or Associative Compound Retrieval?

    Science.gov (United States)

    Forrest, Charlotte L. D.; Monsell, Stephen; McLaren, Ian P. L.

    2014-01-01

    Task-cuing experiments are usually intended to explore control of task set. But when small stimulus sets are used, they plausibly afford learning of the response associated with a combination of cue and stimulus, without reference to tasks. In 3 experiments we presented the typical trials of a task-cuing experiment: a cue (colored shape) followed,…

  19. Selective presynaptic terminal remodeling induced by spatial, but not cued, learning: a quantitative confocal study

    Science.gov (United States)

    McGonigal, R.; Tabatadze, N.; Routtenberg, A.

    2011-01-01

    The hippocampal mossy fibers (MFs) are capable of behaviorally-selective, use-dependent structural remodeling. Indeed, we previously observed a new layer of Timm’s staining induced in the stratum oriens (SO) in CA3 after spatial but not cued water maze learning (Rekart et al., Learn. Mem. 2007; 14:416–421). This led to the prediction that there is a learning-specific induction of presynaptic terminal plasticity of MF axons. The present study confirms this prediction demonstrating, at the confocal level of analysis, terminal-specific and behavior-selective presynaptic structural plasticity linked to long-term memory. Male adult Wistar rats were trained for 5d to locate a hidden or visible platform in a water maze and a retention test was performed 7d later. MF terminal subtypes, specifically identified by an antibody to zinc transporter 3 (ZnT3), were counted from confocal z-stacks in the stratum lucidum (SL) and the SO. In hidden platform trained rats there was a significant increase in the number of large MF terminals (LMTs, 2.5–10µm diameter, >2µm2 area) compared to controls both in the proximal SL (p CA3 pyramidal neurons, while SMTs are known to target inhibitory interneurons. The present findings highlight the pivotal role in memory of presynaptic structural plasticity. Because the ‘sprouting’ observed is specific to the LMT, with no detectable change in the number of the SMT, learning may enhance net excitatory input to CA3 pyramidal neurons. Given the sparse coding of the MF-CA3 connection, and the role that granule cells play in pattern separation, the remodeling observed here may be expected to have a major impact on the long-term integration of spatial context into memory. PMID:22180136

  20. Selective presynaptic terminal remodeling induced by spatial, but not cued, learning: a quantitative confocal study.

    Science.gov (United States)

    McGonigal, R; Tabatadze, N; Routtenberg, A

    2012-06-01

    The hippocampal mossy fibers (MFs) are capable of behaviorally selective, use-dependent structural remodeling. Indeed, we previously observed a new layer of Timm's staining induced in the stratum oriens (SO) in CA3 after spatial but not cued water maze learning (Rekart et al., (2007) Learn Mem 14:416-421). This led to the prediction that there is a learning-specific induction of presynaptic terminal plasticity of MF axons. This study confirms this prediction demonstrating, at the confocal level of analysis, terminal-specific, and behavior-selective presynaptic structural plasticity linked to long-term memory. Male adult Wistar rats were trained for 5 days to locate a hidden or visible platform in a water maze and a retention test was performed 7 days later. MF terminal subtypes, specifically identified by an antibody to zinc transporter 3 (ZnT3), were counted from confocal z-stacks in the stratum lucidum (SL) and the SO. In hidden platform trained rats, there was a significant increase in the number of large MF terminals (LMTs, 2.5-10 μm diameter, >2 μm(2) area) compared to controls both in the proximal SL (P CA3 pyramidal neurons, while SMTs are known to target inhibitory interneurons. The present findings highlight the pivotal role in memory of presynaptic structural plasticity. Because the "sprouting" observed is specific to the LMT, with no detectable change in the number of the SMT, learning may enhance net excitatory input to CA3 pyramidal neurons. Given the sparse coding of the MF-CA3 connection, and the role that granule cells play in pattern separation, the remodeling observed here may be expected to have a major impact on the long-term integration of spatial context into memory.

  1. Site-selective Cu deposition on Pt dendrimer-encapsulated nanoparticles: correlation of theory and experiment.

    Science.gov (United States)

    Carino, Emily V; Kim, Hyun You; Henkelman, Graeme; Crooks, Richard M

    2012-03-07

    The voltammetry of Cu underpotential deposition (UPD) onto Pt dendrimer-encapsulated nanoparticles (DENs) containing an average of 147 Pt atoms (Pt(147)) is correlated to density functional theory (DFT) calculations. Specifically, the voltammetric peak positions are in good agreement with the calculated energies for Cu deposition and stripping on the Pt(100) and Pt(111) facets of the DENs. Partial Cu shells on Pt(147) are more stable on the Pt(100) facets, compared to the Pt(111) facets, and therefore, Cu UPD occurs on the 4-fold hollow sites of Pt(100) first. Finally, the structures of Pt DENs having full and partial monolayers of Cu were characterized in situ by X-ray absorption spectroscopy (XAS). The results of XAS studies are also in good agreement with the DFT-optimized models.

  2. Impact of Reminders on Children's Cognitive Flexibility, Intrinsic Motivation, and Mood Depends on Who Provides the Reminders.

    Science.gov (United States)

    Qu, Li; Ong, Jing Y

    2015-01-01

    Reminding children to think about alternatives is a strategy adults often use to promote children's cognitive flexibility, as well as children's engagement in and enjoyment of the task. The current study investigated whether the impacts of reminders on kindergarten children's cognitive flexibility, intrinsic motivation, and mood are moderated by who provides the reminders. Eighty-three healthy 5-year-old kindergarten children were randomly assigned to 2 (Reminder: no reminders vs. Reminders) × 2 (Agent: Tester vs. Partner) conditions. Children's cognitive flexibility was measured via the Block Sorting Task (Garton and Pratt, 2001; Fawcett and Garton, 2005). Children reported their motivation and mood before Block Sorting, after practicing for Block Sorting, and after the actual Block Sorting. Children's intrinsic motivation was measured by evaluating children's choices during a period of free play after Block Sorting. The results revealed that, depending on who provides the reminders, reminding children of alternatives can influence kindergarten children's performance on Block Sorting, children's intrinsic motivation, and children's self-reported mood.

  3. Fabrication and heat treatment of high strength Al-Cu-Mg alloy processed using selective laser melting

    Science.gov (United States)

    Zhang, Hu; Zhu, Haihong; Nie, Xiaojia; Qi, Ting; Hu, Zhiheng; Zeng, Xiaoyan

    2016-04-01

    The proposed paper illustrates the fabrication and heat treatment of high strength Al-Cu-Mg alloy produced by selective laser melting (SLM) process. Al-Cu-Mg alloy is one of the heat treatable aluminum alloys regarded as difficult to fusion weld. SLM is an additive manufacturing technique through which components are built by selectively melting powder layers with a focused laser beam. The process is characterized by short laser-powder interaction times and localized high heat input, which leads to steep thermal gradients, rapid solidification and fast cooling. In this research, 3D Al-Cu-Mg parts with relative high density of 99.8% are produced by SLM from gas atomized powders. Room temperature tensile tests reveal a remarkable mechanical behavior: the samples show yield and tensile strengths of about 276 MPa and 402 MPa, respectively, along with fracture strain of 6%. The effect of solution treatment on microstructure and related tensile properties is examined and the results demonstrate that the mechanical behavior of the SLMed Al-Cu-Mg samples can be greatly enhanced through proper heat treatment. After T4 solution treatment at 540°C, under the effect of precipitation strengthening, the tensile strength and the yield strength increase to 532 MPa and 338 MPa, respectively, and the elongation increases to 13%.

  4. The effect of reminder systems on patients' adherence to treatment

    Directory of Open Access Journals (Sweden)

    Fenerty SD

    2012-02-01

    Full Text Available Sarah D Fenerty1, Cameron West1, Scott A Davis1, Sebastian G Kaplan3, Steven R Feldman1,2,41Center for Dermatology Research, Department of Dermatology, 2Department of Pathology, 3Department of Psychiatry and Behavioral Medicine, 4Department of Public Health Sciences, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USABackground: Patient adherence is an important component of the treatment of chronic disease. An understanding of patient adherence and its modulating factors is necessary to correctly interpret treatment efficacy and barriers to therapeutic success.Purpose: This meta-analysis aims to systematically review published randomized controlled trials of reminder interventions to assist patient adherence to prescribed medications.Methods: A Medline search was performed for randomized controlled trials published between 1968 and June 2011, which studied the effect of reminder-based interventions on adherence to self-administered daily medications.Results: Eleven published randomized controlled trials were found between 1999 and 2009 which measured adherence to a daily medication in a group receiving reminder interventions compared to controls receiving no reminders. Medication adherence was measured as the number of doses taken compared to the number prescribed within a set period of time. Meta-analysis showed a statistically significant increase in adherence in groups receiving a reminder intervention compared to controls (66.61% versus 54.71%, 95% CI for mean: 0.8% to 22.4%. Self-reported and electronically monitored adherence rates did not significantly differ (68.04% versus 63.67%, P = 1.0. Eight of eleven studies showed a statistically significant increase in adherence for at least one of the reminder group arms compared to the control groups receiving no reminder intervention.Limitations: The data are limited by imperfect measures of adherence due to variability in data collection methods. It is also likely

  5. Enhanced selective removal of Cu(II) from aqueous solution by novel polyethylenimine-functionalized ion imprinted hydrogel: Behaviors and mechanisms.

    Science.gov (United States)

    Wang, Jingjing; Li, Zhengkui

    2015-12-30

    A novel polyethylenimine-functionalized ion-imprinted hydrogel (Cu(II)-p(PEI/HEA)) was newly synthesized by (60)Co-γ-induced polymerization for the selective removal of Cu(II) from aqueous solution. The adsorption performances including the adsorption capacity and selectivity of the novel hydrogel were much better than those of similar adsorbents reported. The hydrogel was characterized via scanning electron microscope, transmission electron microscopy, Fourier transform infrared spectra, thermal gravimetric analysis and X-ray photoelectron spectroscopy to determine the structure and mechanisms. The adsorption process was pH and temperature sensitive, better fitted to pseudo-second-order equation, and was Langmuir monolayer adsorption. The maximum adsorption capacity for Cu(II) was 40.00 mg/g. The selectivity coefficients of ion-imprinted hydrogel for Cu(II)/Pb(II), Cu(II)/Cd(II) and Cu(II)/Ni(II) were 55.09, 107.47 and 63.12, respectively, which were 3.93, 4.25 and 3.53 times greater than those of non-imprinted hydrogel, respectively. Moreover, the adsorption capacity of Cu(II)-p(PEI/HEA) could still keep more than 85% after four adsorption-desorption cycles. Because of such enhanced selective removal performance and excellent regeneration property, Cu(II)-p(PEI/HEA) is a promising adsorbent for the selective removal of copper ions from wastewater.

  6. Automated telephone reminder messages can assist electronic diabetes care.

    Science.gov (United States)

    Mollon, Brent; Holbrook, Anne M; Keshavjee, Karim; Troyan, Sue; Gaebel, Kathryn; Thabane, Lehana; Perera, Gihan

    2008-01-01

    Telephone reminder systems have been used to assist in the treatment of many chronic diseases. However, it is unclear if these systems can increase medication and appointment adherence in patients with diabetes without direct patient-provider telephone contact. We tested the feasibility of using an automated telephone reminder system (ATRS) to deliver reminder messages to 253 adults with diabetes enrolled in a randomized controlled trial. Eighty-four percent of the patients were able to register using voice recognition and at least one reminder was delivered to 95% of registered patients over a period of 7.5 months. None of the demographic features studied predicted a patient's ability to enroll or to receive reminder calls. At the end of the study, 63% of patients indicated that they wished to continue to receive ATRS calls. The level of system use as determined by the number of received reminder calls was not associated with a change in the number of physician visits or diabetes-related laboratory tests during follow-up. The clinical benefits and sustainability of ATRS remain unproven, but our results indicate that an automated reminder system can be effective for providing messages to a large group of older patients with diabetes.

  7. Highly selective CO2 adsorption accompanied with low-energy regeneration in a two-dimensional Cu(II) porous coordination polymer with inorganic fluorinated PF6(-) anions.

    Science.gov (United States)

    Noro, Shin-ichiro; Hijikata, Yuh; Inukai, Munehiro; Fukushima, Tomohiro; Horike, Satoshi; Higuchi, Masakazu; Kitagawa, Susumu; Akutagawa, Tomoyuki; Nakamura, Takayoshi

    2013-01-01

    High selectivity and low-energy regeneration for adsorption of CO(2) gas were achieved concurrently in a two-dimensional Cu(II) porous coordination polymer, [Cu(PF(6))(2)(4,4'-bpy)(2)](n) (4,4'-bpy = 4,4'-bipyridine), containing inorganic fluorinated PF(6)(-) anions that can act as moderate interaction sites for CO(2) molecules.

  8. A Reminder and a Memorial [Book Review

    Directory of Open Access Journals (Sweden)

    Alfred White Franklin

    2009-09-01

    Full Text Available Originally published in the British Medical Journal on March 22, 1980, Volume 280, pages 851-855. The Quality of Life: the Peckham Approach to Human Ethology. Innes H Pearse. (Pp 194; £6 50. Scottish Academic Press.1979. The biologist studies man as a physical organism existing in a space-time world of measurable dimensions. This organism has the ability to adapt to changes in its environment; to the processes ofgrowth, development and aging; and to disease. The main objectives of medicine have been to help both adaptation and defence. Prevention through hygiene and immunisation, drugs, surgical removals, and replacements-all these make their contributions, which have increased in complexity and expense, disappointing Beveridge's hope in 1949 that a National Health Service plus rehabilitation (then a novelty would so improve health that the Service would wither away. To avoid and prevent ill health are worthy aims; to promote health is also worthy, but something different. It was to study healthy living that Dr Scott Williamson, Dr Innes Pearse, and their colleagues devised the Peckham experiment, of which this book is at once a reminder and a memorial. They wanted to study Homo sapiens in his natural habitat and they began their exploration as biologists. In an initial family club of 150 families they noted that disorders, however skilfully treated, recurred in the environment out of which the disorder had arisen. So, in 1935, they designed a laboratory in which human beings could be observed growing up and creating new families. The centre, purpose-built, combined maximum visibility throughout, flexibility, and free access to all members. By the outbreak of war 800-900 families had grown their own lively social life. Many of the original families rejoined when the centre reopened after the war. It finally closed in 1951. Meanwhile, the observers had invented a new role.

  9. Cu-SiO sub 2 /Cu-cermet selective absorbers for solar photothermal conversion. [Cu-SiO sub 2

    Energy Technology Data Exchange (ETDEWEB)

    Garnich, F.; Sailer, E. (Ludwig-Maximilian-Univ. Muenchen (Germany, F.R.))

    1990-01-01

    Cermet solar selective surfaces of absorptance higher than 0.93 and emittance less than 0.05 have been prepared by vacuum coevaporation of quartz glass and copper. Tandem films consisting of this cermet and a copper reflector exhibit thermal stability up to at least 550 K and calculated Carnot photothermal conversion efficiency up to 0.3. (orig.).

  10. Economical way to synthesize SSZ-13 with abundant ion-exchanged Cu+ for an extraordinary performance in selective catalytic reduction (SCR) of NOx by ammonia.

    Science.gov (United States)

    Chen, Biaohua; Xu, Ruinian; Zhang, Runduo; Liu, Ning

    2014-12-02

    In this study, an economical way for SSZ-13 preparation with the essentially cheap choline chloride as template has been attempted. The as-synthesized SSZ-13 zeolite after ion exchange by copper nitrate solution exhibited a superior SCR performance (over 95% NOx conversion across a broad range from 150 to 400 °C) to the traditional zeolite-based catalysts of Cu-Beta and Cu-ZSM-5. Furthermore, the opportune size of pore opening (∼3.8 Å) made Cu-SSZ-13 exhibiting the best selectivity to N2 as well as satisfactory tolerance toward SO2 and C3H6 poisonings. The characterization (XRD, XPS, XRF, and H2-TPR) of samples confirmed that Cu-SSZ-13 possessed the most abundant Cu cations among three investigated Cu-zeolites; furthermore, either on the surface or in the bulk the ratio of Cu(+)/Cu(2+) ions for Cu-SSZ-13 is also the highest. New finding was announced that CHA-type topology is in favor of the formation of copper cations, especially generating much more Cu(+) ions than the others, rather than CuO. The activity test of Cu(CuCl)-ZSM-5 (prepared by a solid-state ion-exchange method) clearly indicated that Cu(+) ions could make a major contribution to the low-temperature deNOx activity. The activity of protonic zeolites (H-SSZ-13, H-Beta, H-ZSM-5) revealed the topology effect on SCR performances.

  11. Implication of auto-generated message reminders system (software and rate of absenteeism in orthodontic clinic: A randomized controlled trial

    Directory of Open Access Journals (Sweden)

    Siddharth Sonwane

    2017-01-01

    Full Text Available Context: Absenteeism is a routine pattern of nonattendance from duty of responsibilities, nonattending to given appointment may have deleterious effect on treatment outcome and revenue generation. Very few studies have been done to know the effect of absenteeism on revenue generation and treatment outcome with the help of postcard, telephone, and text messages as reminder; however, these studies have concluded that there was statistically significant difference found in treatment outcome and revenue generation. Furthermore, our study is the almost first to present with the use of current available reminder tool (software reminder system. Aims: The aim of this study to implicate and evaluate effects of auto-generated message reminder (easy dental software application and previous visit reminder system. Materials and Methods: The sum of 180 patients was selected and divided 90 patients in each group. (1 Study group (Auto-generated message reminder system, (2 control group (previous visit remainder. Auto-generated messages were sent to the study group. No formal information given to control group. Statistical Analysis Used: Student's t-tests were used to compare two groups, and logistic regression was obtained 0.044. Results: In control group, 20% of total sample found to be absent whereas only 10% found to be absent in study group. Student's t-test and logistic regression were seen (P = 0.044. Conclusion: The use of auto-generated message reminder system (easy dental software, reduces the rate of absenteeism and increases clinic economy, proper results with stipulated period, and protect both clinician and patients from unwanted complications.

  12. Mobile phone messaging reminders for attendance at healthcare appointments.

    Science.gov (United States)

    Gurol-Urganci, Ipek; de Jongh, Thyra; Vodopivec-Jamsek, Vlasta; Atun, Rifat; Car, Josip

    2013-12-05

    This review is an update of the original Cochrane review published in July 2012. Missed appointments are a major cause of inefficiency in healthcare delivery with substantial monetary costs for the health system, leading to delays in diagnosis and appropriate treatment. Patients' forgetfulness is one of the main reasons for missed appointments. Patient reminders may help reduce missed appointments. Modes of communicating reminders for appointments to patients include face-to-face communication, postal messages, calls to landlines or mobile phones, and mobile phone messaging. Mobile phone messaging applications, such as Short Message Service (SMS) and Multimedia Message Service (MMS), could provide an important, inexpensive delivery medium for reminders for healthcare appointments. To update our review assessing the effects of mobile phone messaging reminders for attendance at healthcare appointments. Secondary objectives include assessment of costs; health outcomes; patients' and healthcare providers' evaluation of the intervention and perceptions of safety; and possible harms and adverse effects associated with the intervention. Original searches were run in June 2009. For this update, we searched the Cochrane Central Register of Controlled Trials (CENTRAL,The Cochrane Library 2012, Issue 8), MEDLINE (OvidSP) (January 1993 to August 2012), EMBASE (OvidSP) (January 1993 to August 2012), PsycINFO (OvidSP) (January 1993 to August 2012) and CINAHL (EbscoHOST) (January 1993 to August 2012). We also reviewed grey literature (including trial registers) and reference lists of articles. Randomised controlled trials (RCTs) assessing mobile phone messaging as reminders for healthcare appointments. We only included studies in which it was possible to assess effects of mobile phone messaging independent of other technologies or interventions.   Two review authors independently assessed all studies against the inclusion criteria, with any disagreements resolved by a third

  13. Selective hydrogenation of furfural to cyclopentanone over Cu-Ni-Al hydrotalcite-based catalysts

    Energy Technology Data Exchange (ETDEWEB)

    Zhu, Hongyan; Zhou, Minghao; Zeng, Zuo; Xiao, Guomin; Xiao, Rui [Southeast University, Nanjing (China)

    2014-04-15

    A series of Cu-Ni-Al hydrotalcites derived oxides with a (Cu+Ni)/Al mole ratio of 3 with varied Cu/Ni mole ratio (from 0.017 to 0.5, with a Cu ratio of 0.0125 to 0.25) were prepared by co-precipitation method, then applied to the hydrogenation of furfural in aqueous. Their catalytic performance for liquid phase hydrogenation of furfural to prepare cyclopentanone was described in detail, considering reaction temperature, catalyst composition, reaction time and so on. The yield of cyclopentanone was influenced by the mole ratio of Cu-Ni-Al based heterogeneous catalyst and depended on the reaction conditions. The yield of cyclopentanone was up to 95.8% when the reaction was carried out under 413 K with H{sub 2} pressure of 40 bar for 8 h. The catalysts were characterized by X-ray powder diffraction (XRD), scanning electron microscope (SEM) and H{sub 2} temperature-programmed reduction (H{sub 2}-TPR)

  14. Fabrication of friction-reducing texture surface by selective laser melting of ink-printed (SLM-IP) copper (Cu) nanoparticles(NPs)

    Science.gov (United States)

    Wang, Xinjian; Liu, Junyan; Wang, Yang; Fu, Yanan

    2017-02-01

    This paper reports a process of selective laser melting of ink-printed (SLM-IP) copper (Cu) nanoparticles(NPs) for the fabrication of full dense Cu friction-reducing texture on the metallic surface in ambient condition. This technique synthesizes pure Cu by chemical reduction route using an organic solvent during laser melting in the atmosphere environment, and provides a flexible additive manufacture approach to form complex friction-reduction texture on the metallic surface. Microtextures of ring and disc arrays have been fabricated on the stainless steel surface by SLM-IP Cu NPs. The friction coefficient has been measured under the lubricating condition of the oil. Disc texture surface (DTS) has a relatively low friction coefficient compared with ring texture surface (RTS), Cu film surface (Cu-FS) and the untreated substrate. The study suggests a further research on SLM-IP approach for complex microstructure or texture manufacturing, possibly realizing its advantage of flexibility.

  15. Effects of copper-precursors on the catalytic activity of Cu/graphene catalysts for the selective catalytic oxidation of ammonia

    Science.gov (United States)

    Li, Jingying; Tang, Xiaolong; Yi, Honghong; Yu, Qingjun; Gao, Fengyu; Zhang, Runcao; Li, Chenlu; Chu, Chao

    2017-08-01

    Different copper-precursors were used to prepare Cu/graphene catalysts by an impregnation method. XRD, Raman spectra, TEM, BET, XPS, H2-TPR, NH3-TPD, DRIFTS and catalytic activity test were used to characterize and study the effect of precursors on the catalytic activity of Cu/graphene catalysts for NH3-SCO reaction. The large specific surface area of Cu/graphene catalysts and high dispersion of the metal particles on the graphene caused the well catalytic activity of NH3-SCO reaction. Compared to Cu/GE(AC), Cu/GE(N) showed better catalytic performance, and the complete NH3 removal efficiency was obtained at 250 °C with N2 selectivity of 85%. The copper-precursors had influence on the distribution of surface Cu species and further affected the catalytic activity of Cu/GE catalysts. The more amount of surface Cu species and highly dispersed CuO particles on the graphene surface formed by using copper nitrate as precursor could significantly improve the reducibility of catalysts and enhance NH3 adsorption, thereby improving the catalytic activity of Cu/graphene catalyst.

  16. Low Absorption Vitreous Carbon Reactors for Operando XAS: A Case Study on Cu/Zeolites for Selective Catalytic Reduction of NOx by NH3

    Energy Technology Data Exchange (ETDEWEB)

    Kispersky, Vincent F.; Kropf, Jeremy; Ribeiro, Fabio H; Miller, Jeffrey T

    2012-01-01

    We describe the use of vitreous carbon as an improved reactor material for an operando X-ray absorption spectroscopy (XAS) plug-flow reactor. These tubes significantly broaden the operating range for operando experiments. Using selective catalytic reduction (SCR) of NOx by NH₃ on Cu/Zeolites (SSZ-13, SAPO-34 and ZSM-5) as an example reaction, we illustrate the high-quality XAS data achievable with these reactors. The operando experiments showed that in Standard SCR conditions of 300 ppm NO, 300 ppm NH₃, 5% O₂, 5% H₂O, 5% CO₂ and balance He at 200 °C, the Cu was a mixture of Cu(I) and Cu(II) oxidation states. XANES and EXAFS fitting found the percent of Cu(I) to be 15%, 45% and 65% for SSZ-13, SAPO-34 and ZSM-5, respectively. For Standard SCR, the catalytic rates per mole of Cu for Cu/SSZ-13 and Cu/SAPO-34 were about one third of the rate per mole of Cu on Cu/ZSM-5. Based on the apparent lack of correlation of rate with the presence of Cu(I), we propose that the reaction occurs via a redox cycle of Cu(I) and Cu(II). Cu(I) was not found in in situSCR experiments on Cu/Zeolites under the same conditions, demonstrating a possible pitfall of in situ measurements. A Cu/SiO₂ catalyst, reduced in H₂ at 300 °C, was also used to demonstrate the reactor's operando capabilities using a bending magnet beamline. Analysis of the EXAFS data showed the Cu/SiO₂ catalyst to be in a partially reduced Cu metal–Cu(I) state. In addition to improvements in data quality, the reactors are superior in temperature, stability, strength and ease of use compared to previously proposed borosilicate glass, polyimide tubing, beryllium and capillary reactors. The solid carbon tubes are non-porous, machinable, can be operated at high pressure (tested at 25 bar), are inert, have high material purity and high X-ray transmittance.

  17. Low absorption vitreous carbon reactors for operando XAS: a case study on Cu/Zeolites for selective catalytic reduction of NO(x) by NH3.

    Science.gov (United States)

    Kispersky, Vincent F; Kropf, A Jeremy; Ribeiro, Fabio H; Miller, Jeffrey T

    2012-02-21

    We describe the use of vitreous carbon as an improved reactor material for an operando X-ray absorption spectroscopy (XAS) plug-flow reactor. These tubes significantly broaden the operating range for operando experiments. Using selective catalytic reduction (SCR) of NO(x) by NH(3) on Cu/Zeolites (SSZ-13, SAPO-34 and ZSM-5) as an example reaction, we illustrate the high-quality XAS data achievable with these reactors. The operando experiments showed that in Standard SCR conditions of 300 ppm NO, 300 ppm NH(3), 5% O(2), 5% H(2)O, 5% CO(2) and balance He at 200 °C, the Cu was a mixture of Cu(I) and Cu(II) oxidation states. XANES and EXAFS fitting found the percent of Cu(I) to be 15%, 45% and 65% for SSZ-13, SAPO-34 and ZSM-5, respectively. For Standard SCR, the catalytic rates per mole of Cu for Cu/SSZ-13 and Cu/SAPO-34 were about one third of the rate per mole of Cu on Cu/ZSM-5. Based on the apparent lack of correlation of rate with the presence of Cu(I), we propose that the reaction occurs via a redox cycle of Cu(I) and Cu(II). Cu(I) was not found in in situ SCR experiments on Cu/Zeolites under the same conditions, demonstrating a possible pitfall of in situ measurements. A Cu/SiO(2) catalyst, reduced in H(2) at 300 °C, was also used to demonstrate the reactor's operando capabilities using a bending magnet beamline. Analysis of the EXAFS data showed the Cu/SiO(2) catalyst to be in a partially reduced Cu metal-Cu(I) state. In addition to improvements in data quality, the reactors are superior in temperature, stability, strength and ease of use compared to previously proposed borosilicate glass, polyimide tubing, beryllium and capillary reactors. The solid carbon tubes are non-porous, machinable, can be operated at high pressure (tested at 25 bar), are inert, have high material purity and high X-ray transmittance.

  18. Preliminary study on the corrosion resistance, antibacterial activity and cytotoxicity of selective-laser-melted Ti6Al4V-xCu alloys.

    Science.gov (United States)

    Guo, Sai; Lu, Yanjin; Wu, Songquan; Liu, Lingling; He, Mengjiao; Zhao, Chaoqian; Gan, Yiliang; Lin, Junjie; Luo, Jiasi; Xu, Xiongcheng; Lin, Jinxin

    2017-03-01

    In this study, a series of Cu-bearing Ti6Al4V-xCu (x=0, 2, 4, 6wt%) alloys (shorten by Ti6Al4V, 2C, 4C, and 6C, respectively.) with antibacterial function were successfully fabricated by selective laser melting (SLM) technology with mixed spherical powders of Cu and Ti6Al4V for the first time. In order to systematically investigate the effects of Cu content on the microstructure, phase constitution, corrosion resistance, antibacterial properties and cytotoxicity of SLMed Ti6Al4V-xCu alloys, experiments including XRD, SEM-EDS, electrochemical measurements, antibacterial tests and cytotoxicity tests were conducted with comparison to SLMed Ti6Al4V alloy (Ti6Al4V). Microstructural observations revealed that Cu had completely fused into the Ti6Al4V alloy, and presented in the form of Ti2Cu phase at ambient temperature. With Cu content increase, the density of the alloy gradually decreased, and micropores were obviously found in the alloy. Electrochemical measurements showed that corrosion resistance of Cu-bearing alloys were stronger than Cu-free alloy. Antibacterial tests demonstrated that 4C and 6C alloys presented strong and stable antibacterial property against Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) compared to the Ti6Al4V and 2C alloy. In addition, similar to the Ti6Al4V alloy, the Cu-bearing alloys also exerted good cytocompatibility to the Bone Marrow Stromal Cells (BMSCs) from Sprague Dawley (SD) rats. Based on those results, the preliminary study verified that it was feasible to fabricated antibacterial Ti6Al4V-xCu alloys direct by SLM processing mixed commercial Ti6Al4V and Cu powder.

  19. Effectiveness of short message service reminder scheme in Greater Hyderabad Municipal Corporation for children's vaccination: A telephonic survey

    Directory of Open Access Journals (Sweden)

    Shakeel Anjum

    2015-01-01

    Full Text Available Background: Greater Hyderabad Municipal Corporation (GHMC cares for every child. It has introduced a short message service (SMS reminder scheme for children's vaccination, to make their life healthier and secure. SMS as a reminder tool can be extremely effective in health care. Aim: To assess the effectiveness of vaccination SMS reminder scheme by GHMC on mobile phones of parents. Materials and Methods: A cross-sectional study was conducted on 349 subjects whose children were born between January 1, 2014 and June 30, 2014 using telephonic survey method from five hospitals selected randomly. Telephone calls were made to interview using a structured questionnaire. Results: Among 349 subjects, 279 participated in the study for phone interview and 70 subjects (20.1% did not participate. Among 279 subjects, 21.8% (76 subjects received SMS from GHMC whereas 43.8% (158 did not receive, 4.58% (16 subjects do not know how to read SMS, 7.2% (25 subjects did not see the messages and 2.6% (9 subjects were not sure if they were receiving the SMS from GHMC or not. Majority of subjects 71.9% wished to get the reminder SMS from GHMC regularly. Conclusion: The use of SMS reminder scheme for children's vaccination was encouraged by majority of subjects. However, the GHMC scheme was efficient in reaching only 21.8% of the subjects.

  20. ADSORPTION SELECTIVITY FOR Cu2+,Ni2+,Co2+IONS USING CROSSLINKING CHITOSAN RESINS IMPRINTED BY METAL IONS

    Institute of Scientific and Technical Information of China (English)

    HUANGWenqiang; HANLijun; 等

    1999-01-01

    Metal ion-imprintedly crosslinked chitosan resin 1 and resin 2 were prepared by the use of Cu2+ and Ni2+ as template ions and glutaraldehyde as crosslinking agent,respectively,Through investigation on the adsorption capacties and binding constants for Cu2+,Ni2+ and Co2+ ions on chitosan resins,resin 1 and resin 2 exhibit the adsorption selectivity for the mixture solution of 1L1 Cu2+ and Ni2+ ions.The adsorption selectivity of metal ion-imprinted resins for their template ions in much higher than that of uncrosslinked chitosan resin.

  1. CuI complexes with a noninnocent PNP Ligand: selective dearomatization and electrophilic addition reactivity

    NARCIS (Netherlands)

    van der Vlugt, J.I.; Pidko, E.A.; Vogt, D.; Lutz, M.; Spek, A.L.

    2009-01-01

    The neutral, T-shaped complex CuI(PN−PtBu) (2), featuring a dearomatized 2,6-bis(diphosphino)pyridine (PNP)-pincer ligand, is shown to interact rapidly with electrophiles. This has enabled the synthesis of acetato complex 3. Furthermore, C−C bond formation onto the deprotonated methylene-bridgehead

  2. Cu-I complexes with a noninnocent PNP ligand: Selective dearomatization and electrophilic addition reactivity

    NARCIS (Netherlands)

    van der Vlugt, J.I.; Pidko, E.A.; Vogt, D.; Lutz, M.; Spek, A.L.

    2009-01-01

    The neutral, T-shaped complex Cu-I((PN-PtBu)) (2), featuring a dearomatized 2,6-bis(diphosphino)pyridine (PNP)-pincer ligand, is shown to interact rapidly with electrophiles. This has enabled the synthesis of acetato complex 3. Furthermore, C-C bond formation onto the deprotonated methylene-bridgehe

  3. Impacting delayed pediatric influenza vaccination: a randomized controlled trial of text message reminders.

    Science.gov (United States)

    Hofstetter, Annika M; Vargas, Celibell Y; Camargo, Stewin; Holleran, Stephen; Vawdrey, David K; Kharbanda, Elyse Olshen; Stockwell, Melissa S

    2015-04-01

    Influenza vaccination coverage is low, especially among low-income populations. Most doses are generally administered early in the influenza season, yet sustained vaccination efforts are crucial for achieving optimal coverage. The impact of text message influenza vaccination reminders was recently demonstrated in a low-income population. Little is known about their effect on children with delayed influenza vaccination or the most effective message type. To determine the impact of educational plus interactive text message reminders on influenza vaccination of urban low-income children unvaccinated by late fall. Randomized controlled trial. Parents of 5,462 children aged 6 months-17 years from four academically affiliated pediatric clinics who were unvaccinated by mid-November 2011. Eligible parents were stratified by their child's age and pediatric clinic site and randomized using a 1:1:1 allocation to educational plus interactive text message reminders, educational-only text message reminders, or usual care. Using an immunization registry-linked text messaging system, parents of intervention children received up to seven weekly text message reminders. One of the messages sent to parents in the educational plus interactive text message arm allowed selection of more information about influenza and influenza vaccination. Influenza vaccination by March 31, 2012. Data were collected and analyzed between 2012 and 2014. Most children were publicly insured and Spanish speaking. Baseline demographics were similar between groups. More children of parents in the educational plus interactive text message arm were vaccinated (38.5%) versus those in the educational-only text message (35.3%; difference=3.3%, 95% CI=0.02%, 6.5%; relative risk ratio (RRR)=1.09, 95% CI=1.002, 1.19) and usual care (34.8%; difference=3.8%, 95% CI=0.6%, 7.0%; RRR=1.11, 95% CI=1.02-1.21) arms. Text message reminders with embedded educational information and options for interactivity have a small

  4. The effect of reminders in a web-based intervention study

    DEFF Research Database (Denmark)

    Svensson, M.; Svensson, T.; Hansen, A. W.;

    2012-01-01

    was sent. To encourage study participation, 4-5 and 11 e-mail reminders were sent at baseline and follow-up, respectively. Additional reminders (media articles, flyers, SMS etc) were also administered. Reminders (e-mails + additional) were given in low (a parts per thousand currency sign6 reminders......). About 29 % responded before any e-mail reminder, following 26 and 45 % after 1 respective a parts per thousand yen 2 e-mail reminders. Participant characteristics were not related to when the participants responded. The 4-5 e-mail reminders increased total response rate by 15 %, the eleven by 21...

  5. The Cu-CHA deNOx Catalyst in Action: Temperature-Dependent NH3-Assisted Selective Catalytic Reduction Monitored by Operando XAS and XES.

    Science.gov (United States)

    Lomachenko, Kirill A; Borfecchia, Elisa; Negri, Chiara; Berlier, Gloria; Lamberti, Carlo; Beato, Pablo; Falsig, Hanne; Bordiga, Silvia

    2016-09-21

    The small-pore Cu-CHA zeolite is today the object of intensive research efforts to rationalize its outstanding performance in the NH3-assisted selective catalytic reduction (SCR) of harmful nitrogen oxides and to unveil the SCR mechanism. Herein we exploit operando X-ray spectroscopies to monitor the Cu-CHA catalyst in action during NH3-SCR in the 150-400 °C range, targeting Cu oxidation state, mobility, and preferential N or O ligation as a function of reaction temperature. By combining operando XANES, EXAFS, and vtc-XES, we unambiguously identify two distinct regimes for the atomic-scale behavior of Cu active-sites. Low-temperature SCR, up to ∼200 °C, is characterized by balanced populations of Cu(I)/Cu(II) sites and dominated by mobile NH3-solvated Cu-species. From 250 °C upward, in correspondence to the steep increase in catalytic activity, the largely dominant Cu-species are framework-coordinated Cu(II) sites, likely representing the active sites for high-temperature SCR.

  6. Devitrification kinetics and phase selection mechanisms in Cu-Zr metallic glasses

    Energy Technology Data Exchange (ETDEWEB)

    Kalay, Ilkay [Iowa State Univ., Ames, IA (United States)

    2010-01-01

    Metallic glasses have been a promising class of materials since their discovery in the 1960s. Indeed, remarkable chemical, mechanical and physical properties have attracted considerable attention, and several excellent reviews are available. Moreover, the special group of glass forming alloys known as the bulk metallic glasses (BMG) become amorphous solids even at relatively low cooling rates, allowing them to be cast in large cross sections, opening the scope of potential applications to include bulk forms and net shape structural applications. Recent studies have been reported for new bulk metallic glasses produced with lower cooling rates, from 0.1 to several hundred K/s. Some of the application products of BMGs include sporting goods, high performance springs and medical devices. Several rapid solidification techniques, including melt-spinning, atomization and surface melting have been developed to produce amorphous alloys. The aim of all these methods is to solidify the liquid phase rapidly enough to suppress the nucleation and growth of crystalline phases. Furthermore, the production of amorphous/crystalline composite (ACC) materials by partial crystallization of amorphous precursor has recently given rise to materials that provide better mechanical and magnetic properties than the monolithic amorphous or crystalline alloys. In addition, these advances illustrate the broad untapped potential of using the glassy state as an intermediate stage in the processing of new materials and nanostructures. These advances underlie the necessity of investigations on prediction and control of phase stability and microstructural dynamics during both solidification and devitrification processes. This research presented in this dissertation is mainly focused on Cu-Zr and Cu-Zr-Al alloy systems. The Cu-Zr binary system has high glass forming ability in a wide compositional range (35-70 at.% Cu). Thereby, Cu-Zr based alloys have attracted much attention according to fundamental

  7. Enhanced hydrothermal stability of Cu-ZSM-5 catalyst via surface modification in the selective catalytic reduction of NO with NH{sub 3}

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Tao; Shi, Juan; Liu, Jian, E-mail: liujian@cup.edu.cn; Wang, Daxi; Zhao, Zhen, E-mail: zhenzhao@cup.edu.cn; Cheng, Kai; Li, Jianmei

    2016-07-01

    Highlights: • The hydrothermal stability of Cu-ZSM-5 catalyst was enhanced after surface modification. • An inert silica layer was deposited on the surface of Cu-ZSM-5 and formed a protective layer. • The contact between Si and Cu and Al atoms could form Si-O-Al and Si- O−Cu bonds. • The redox and acidity properties of Cu-ZSM-5-CLD-Aged catalyst were largely retained. • The adsorption and activation of NO and NH{sub 3} was almost unchanged over Cu-ZSM-5-CLD catalyst before and after hydrothermal treatment. - Abstract: The surface of Cu-ZSM-5 catalyst was modified by chemical liquid deposition (CLD) of tetraethoxysilane (TEOS) for enhancing its hydrothermal stability in the selective catalytic reduction of NO with NH{sub 3}. After hydrothermal aging at 750 °C for 13 h, the catalytic performance of Cu-ZSM-5-Aged catalyst was significantly reduced for NO reduction in the entire temperature range, while that of Cu-ZSM-5-CLD-Aged catalyst was affected very little. The characterization results indicated that an inert silica layer was deposited on the surface of Cu-ZSM-5 and formed a protective layer, which prevents the detachment of Cu{sup 2+} from ZSM-5 ion-exchange positions and the dealumination of zeolite during the hydrothermal aging process. Based on the data it is hypothesized to be the primary reason for the high hydrothermal stability of Cu-ZSM-5-CLD catalyst.

  8. W/Cu thin film infrared reflector for TiNxOy based selective solar absorber with high thermal stability

    Science.gov (United States)

    Zhang, J.; Chen, T. P.; Liu, Y. C.; Liu, Z.; Yang, H. Y.

    2017-05-01

    The W/Cu thin film structure is deposited by magnetron sputtering to form the infrared reflector for the TiNxOy based selective solar absorber (SSA) that can be used in the low- and middle-temperature applications. The structural, chemical, and optical properties of the SSA layers that experienced thermal annealing at different temperatures for various durations have been investigated with the characterization techniques, including X-ray photoelectron spectroscopy, X-ray diffraction, atomic force microscopy, spectroscopic ellipsometry, and spectrophotometry. Without a W layer, the reflectance in both visible and infrared ranges of the SSA increases as a result of the crystallization of the Cu layer at elevated temperatures. With a W layer with appropriate film thickness, the increase of the reflectance in the visible range can be suppressed to maintain a high solar absorptance, whereas a high infrared reflectance can be maintained to achieve a low thermal emittance. It is shown that for the SiO2-TiNxOy-W-Cu-Glass SSA with a 15 nm W thin film, thermal annealing can significantly reduce the thermal emittance to a low value (e.g., 4.4% at the temperature of 400 °C for annealing at 400 °C for 6 h), whereas the solar absorptance can be maintained at a high value (e.g., 92.2% for the annealing at 400 °C for 6 h).

  9. Order-Induced Selectivity Increase of Cu60Pd40 in the Semi-Hydrogenation of Acetylene

    Directory of Open Access Journals (Sweden)

    Marc Armbrüster

    2013-07-01

    Full Text Available The two structural modifications of Cu60Pd40 were synthesized as bulk powders and tested as unsupported model catalysts in the semi-hydrogenation of acetylene. The partly ordered low-temperature modification (CsCl type of structure showed an outstanding ethylene selectivity of >90% over 20 h on stream while the disordered high-temperature modification (Cu type of structure was 20% less selective, indicating an influence of the degree of order in the crystal structure on the catalytic properties. The results are supported by XRD and in situ XPS experiments. The latter suggest the existence of partly isolated Pd sites on the surface. In situ PGAA investigations proved the absence of metal hydride formation during reaction. Quantum chemical calculations of the electronic structure of both modifications using the CPA-FPLO framework revealed significant differences in their respective density of states, thus still leaving open the question of whether the degree of structural order or/and the electronic hybridization is the decisive factor for the observed difference in selectivity.

  10. Parent opinions about use of text messaging for immunization reminders.

    Science.gov (United States)

    Ahlers-Schmidt, Carolyn Rose; Chesser, Amy K; Paschal, Angelia M; Hart, Traci A; Williams, Katherine S; Yaghmai, Beryl; Shah-Haque, Sapna

    2012-06-06

    Adherence to childhood immunization schedules is a function of various factors. Given the increased use of technology as a strategy to increase immunization coverage, it is important to investigate how parents perceive different forms of communication, including traditional means and text-message reminders. To examine current forms of communication about immunization information, parents' satisfaction levels with these communication modes, perceived barriers and benefits to using text messaging, and the ideal content of text messages for immunization reminders. Structured interviews were developed and approved by two Institutional Review Boards. A convenience sample of 50 parents was recruited from two local pediatric clinics. The study included a demographics questionnaire, the shortened form of the Test of Functional Health Literacy for Adults (S-TOFHLA), questions regarding benefits and barriers of text communication from immunization providers, and preferred content for immunization reminders. Content analyses were performed on responses to barriers, benefits, and preferred content (all Cohen's kappas > 0.70). Respondents were mostly female (45/50, 90%), white non-Hispanic (31/50, 62%), between 20-41 years (mean = 29, SD 5), with one or two children (range 1-9). Nearly all (48/50, 96%) had an S-TOFHLA score in the "adequate" range. All parents (50/50, 100%) engaged in face-to-face contact with their child's physician at appointments, 74% (37/50) had contact via telephone, and none of the parents (0/50, 0%) used email or text messages. Most parents were satisfied with the face-to-face (48/50, 96%) and telephone (28/50, 75%) communication. Forty-nine of the 50 participants (98%) were interested in receiving immunization reminders by text message, and all parents (50/50, 100%) were willing to receive general appointment reminders by text message. Parents made 200 comments regarding text-message reminders. Benefits accounted for 63.5% of comments (127/200). The

  11. Site selective Cu2+ substitution in single crystal Fe3O4 biocompatible nanospheres by solvothermal reflux method

    Science.gov (United States)

    Manohar, A.; Krishnamoorthi, C.

    2017-09-01

    Transition metal cations distribution among tetrahedral and octahedral sites in Fe3O4 has profound influence on it properties. The cations distribution among these sites were influenced by crystal field stabilization energy (CFSE) of a substituent ion. It was reported that Cu2+ substitutes both Fe3+ in tetrahedral and Fe2+ in octahedral sites of magnetite though it has high CFSE for octahedral sites. Thus it promotes mixed (normal & inverse) spinel structure and hence the properties deviate from the prediction. Here we show that selective octahedral site substitution of Fe2+ by Cu2+ in single crystal Fe3O4 nanoparticles was possible by solvothermal reflux method at moderate temperatures (≈300 °C). It was attributed to reduced energy barrier for crystallization and high diffusion coefficient of the metal cations at moderate temperature in low viscous organic solvents mixture, at ambient pressure, compared to coprecipitation and solid state reaction protocols. In addition, effective removal of exothermic crystal lattice energy, released during nucleation and growth process, by natural gas bubbles formed in the reflux organic solvent mixture. This promotes effective diffusion of cations during the growth process and easy octahedral occupation by Cu2+ in Fe1-xCuxFe2O4 (x = 0, 0.1, 0.2, 0.3, 0.4, 0.5 & 0.6) single crystal nanospheres. The octahedral substitution was confirmed by reduction of crystal lattice parameter as well as ferromagnetic strength of octahedral sublattice with enhanced Cu2+ concentration. In addition, morphology, lattice vibrational frequency and electron excitation spectra of the nanospheres were studied. The Langevin function fit analysis reveals that superparamagnetic domain diameter were slightly less than the particle diameter obtained from TEM micrograph.

  12. Selective recovery of dissolved Fe, Al, Cu, and Zn in acid mine drainage based on modeling to predict precipitation pH.

    Science.gov (United States)

    Park, Sang-Min; Yoo, Jong-Chan; Ji, Sang-Woo; Yang, Jung-Seok; Baek, Kitae

    2015-02-01

    Mining activities have caused serious environmental problems including acid mine drainage (AMD), the dispersion of mine tailings and dust, and extensive mine waste. In particular, AMD contaminates soil and water downstream of mines and generally contains mainly valuable metals such as Cu, Zn, and Ni as well as Fe and Al. In this study, we investigated the selective recovery of Fe, Al, Cu, Zn, and Ni from AMD. First, the speciation of Fe, Al, Cu, Zn, and Ni as a function of the equilibrium solution pH was simulated by Visual MINTEQ. Based on the simulation results, the predicted pHs for the selective precipitation of Fe, Al, Cu, and Zn/Ni were determined. And recovery yield of metals using simulation is over 99 %. Experiments using artificial AMD based on the simulation results confirmed the selective recovery of Fe, Al, Cu, and Zn/Ni, and the recovery yields of Fe/Al/Cu/Zn and Fe/Al/Cu/Ni mixtures using Na2CO3 were 99.6/86.8/71.9/77.0 % and 99.2/85.7/73.3/86.1 %, respectively. After then, the simulation results were applied to an actual AMD for the selective recovery of metals, and the recovery yields of Fe, Al, Cu, and Zn using NaOH were 97.2, 74.9, 66.9, and 89.7 %, respectively. Based on the results, it was concluded that selective recovery of dissolved metals from AMD is possible by adjusting the solution pH using NaOH or Na2CO3 as neutralizing agents.

  13. Effect of Reminder Devices on Medication Adherence: The REMIND Randomized Clinical Trial.

    Science.gov (United States)

    Choudhry, Niteesh K; Krumme, Alexis A; Ercole, Patrick M; Girdish, Charmaine; Tong, Angela Y; Khan, Nazleen F; Brennan, Troyen A; Matlin, Olga S; Shrank, William H; Franklin, Jessica M

    2017-05-01

    Forgetfulness is a major contributor to nonadherence to chronic disease medications and could be addressed with medication reminder devices. To compare the effect of 3 low-cost reminder devices on medication adherence. This 4-arm, block-randomized clinical trial involved 53 480 enrollees of CVS Caremark, a pharmacy benefit manager, across the United States. Eligible participants were aged 18 to 64 years and taking 1 to 3 oral medications for long-term use. Participants had to be suboptimally adherent to all of their prescribed therapies (with a medication possession ratio of 30% to 80%) in the 12 months before randomization. Participants were stratified on the basis of the medications they were using at randomization: medications for cardiovascular or other nondepression chronic conditions (the chronic disease stratum) and antidepressants (the antidepressant stratum). In each stratum, randomization occurred within blocks defined by whether all of the patient's targeted medications were dosed once daily. Patients were randomized to receive in the mail a pill bottle strip with toggles, digital timer cap, or standard pillbox. The control group received neither notification nor a device. Data were collected from February 12, 2013, through March 21, 2015, and data analyses were on the intention-to-treat population. The primary outcome was optimal adherence (medication possession ratio ≥80%) to all eligible medications among patients in the chronic disease stratum during 12 months of follow-up, ascertained using pharmacy claims data. Secondary outcomes included optimal adherence to cardiovascular medications among patients in the chronic disease stratum as well as optimal adherence to antidepressants. Of the 53 480 participants, mean (SD) age was 45 (12) years and 56% were female. In the primary analysis, 15.5% of patients in the chronic disease stratum assigned to the standard pillbox, 15.1% assigned to the digital timer cap, 16.3% assigned to the pill bottle

  14. Pd-Cu-Ti-PILC上丙烯选择催化还原NO的活性研究%Pd-Cu-Ti-PILC for selective catalytic reduction of NO by propylene

    Institute of Scientific and Technical Information of China (English)

    陆光; 马国辉; 曲振平; 李新勇

    2015-01-01

    Cu-Ti-PILC and Pd/Cu-Ti-PILC catalysts were prepared using ion exchange strategy and used for selective catalytic reduction ( SCR ) of NO by propylene. The influences of Pd species on catalyst structure and catalytic performance were investigated by XRD,TPR,NO-TPD and C3 H6-SCR. The results of XRD showed that Pd destroyed interlayer arrangement of clay and did not change the interlayer distance of Ti-PILC. TPR results showed that Pd changed the redox of Cu species. NO-TPD results showed that Pd increased the nitrate amount. The results of C3 H6-SCR showed that Pd improved the N2 yield over Cu-Ti-PILC.%采用浸渍法制备Cu-Ti-PILC和Pd/Cu-Ti-PILC催化剂,结合X射线衍射谱( XRD)、程序升温还原( TPR)、NO程序升温脱附( NO-TPD)、丙烯选择催化还原NO( C3 H6-SCR)研究Pd组分对Cu-Ti-PILC催化剂结构和催化还原NO能力的影响。 XRD结果表明,Pd物种破坏了蒙脱土的层间排列但未改变Ti-PILC的层间距;TPR结果表明, Pd改变Cu-Ti-PILC催化剂表面上铜物种的还原性能;NO-TPD结果表明,Pd组分提高催化剂化学吸附NO;C3 H6-SCR结果显示Pd物种能够提高Cu-Ti-PILC催化效果。

  15. Excellent performance of one-pot synthesized Cu-SSZ-13 catalyst for the selective catalytic reduction of NOx with NH3.

    Science.gov (United States)

    Xie, Lijuan; Liu, Fudong; Ren, Limin; Shi, Xiaoyan; Xiao, Feng-Shou; He, Hong

    2014-01-01

    Cu-SSZ-13 samples prepared by a novel one-pot synthesis method achieved excellent NH3-SCR performance and high N2 selectivity from 150 to 550 °C after ion exchange treatments. The selected Cu3.8-SSZ-13 catalyst was highly resistant to large space velocity (800 000 h(-1)) and also maintained high NOx conversion in the presence of CO2, H2O, and C3H6 in the simulated diesel exhaust. Isolated Cu(2+) ions located in three different sites were responsible for its excellent NH3-SCR activity. Primary results suggest that the one-pot synthesized Cu-SSZ-13 catalyst is a promising candidate as an NH3-SCR catalyst for the NOx abatement from diesel vehicles.

  16. Selective C–C Coupling Reaction of Dimethylphenol to Tetramethyldiphenoquinone Using Molecular Oxygen Catalyzed by Cu Complexes Immobilized in Nanospaces of Structurally-Ordered Materials

    Directory of Open Access Journals (Sweden)

    Zen Maeno

    2015-02-01

    Full Text Available Two high-performance Cu catalysts were successfully developed by immobilization of Cu ions in the nanospaces of poly(propylene imine (PPI dendrimer and magadiite for the selective C–C coupling of 2,6-dimethylphenol (DMP to 3,3',5,5'-tetramethyldiphenoquinone (DPQ with O2 as a green oxidant. The PPI dendrimer encapsulated Cu ions in the internal nanovoids to form adjacent Cu species, which exhibited significantly high catalytic activity for the regioselective coupling reaction of DMP compared to previously reported enzyme and metal complex catalysts. The magadiite-immobilized Cu complex acted as a selective heterogeneous catalyst for the oxidative C–C coupling of DMP to DPQ. This heterogeneous catalyst was recoverable from the reaction mixture by simple filtration, reusable without loss of efficiency, and applicable to a continuous flow reactor system. Detailed characterization using ultraviolet-visible (UV-vis, Fourier transform infrared (FTIR, electronic spin resonance (ESR, and X-ray absorption fine structure (XAFS spectroscopies and the reaction mechanism investigation revealed that the high catalytic performances of these Cu catalysts were ascribed to the adjacent Cu species generated within the nanospaces of the PPI dendrimer and magadiite.

  17. Real-time alerts and reminders using information systems.

    Science.gov (United States)

    Wanderer, Jonathan P; Sandberg, Warren S; Ehrenfeld, Jesse M

    2011-09-01

    Adoption of information systems throughout the hospital environment has enabled the development of real-time physiologic alerts and clinician reminder systems. These clinical tools can be made available through the deployment of anesthesia information management systems (AIMS). Creating usable alert systems requires understanding of technical considerations. Various successful implementations are reviewed, encompassing cost reduction, improved revenue capture, timely antibiotic administration, and postoperative nausea and vomiting prophylaxis. Challenges to the widespread use of real-time alerts and reminders include AIMS adoption rates and the difficulty in choosing appropriate areas and approaches for information systems support.

  18. Email for the coordination of healthcare appointments and attendance reminders.

    Science.gov (United States)

    Atherton, Helen; Sawmynaden, Prescilla; Meyer, Barbara; Car, Josip

    2012-08-15

    Email is a popular and commonly-used method of communication, but its use in health care is not routine. Where email communication has been utilised in health care, its purposes have included the coordination of healthcare appointments and attendance reminders, but the effects of using email in this way are not known. This review considers the use of email for the coordination of healthcare appointments and reminders for attendance; particularly scheduling, rescheduling and cancelling healthcare appointments, and providing prompts/reminders for attendance at appointments. To assess the effects of using email for the coordination of healthcare appointments and attendance reminders, compared to other forms of coordinating appointments and reminders, on outcomes for health professionals, patients and carers, and health services, including harms. We searched: the Cochrane Consumers and Communication Review Group Specialised Register, the Cochrane Central Register of Controlled Trials (CENTRAL, The Cochrane Library, Issue 1 2010), MEDLINE (OvidSP) (1950 to January 2010), EMBASE (OvidSP) (1980 to January 2010), PsycINFO (OvidSP) (1967 to January 2010), CINAHL (EbscoHOST) (1982 to February 2010),and ERIC (CSA) (1965 to January 2010). We searched grey literature: theses/dissertation repositories, trials registers and Google Scholar (searched July 2010). We used additional search methods: examining reference lists and contacting authors. Randomised controlled trials, quasi-randomised trials, controlled before and after studies and interrupted time series studies of interventions that use email for scheduling health appointments, for reminders for a scheduled health appointment or for ongoing coordination of health appointments and that took the form of 1) unsecured email 2) secure email or 3) web messaging. All healthcare professionals, patients and caregivers in all settings were considered. Two review authors independently assessed the titles and abstracts of retrieved

  19. A Comparative Discussion of the Catalytic Activity and CO2-Selectivity of Cu-Zr and Pd-Zr (Intermetallic Compounds in Methanol Steam Reforming

    Directory of Open Access Journals (Sweden)

    Norbert Köpfle

    2017-02-01

    Full Text Available The activation and catalytic performance of two representative Zr-containing intermetallic systems, namely Cu-Zr and Pd-Zr, have been comparatively studied operando using methanol steam reforming (MSR as test reaction. Using an inverse surface science and bulk model catalyst approach, we monitored the transition of the initial metal/intermetallic compound structures into the eventual active and CO2-selective states upon contact to the methanol steam reforming mixture. For Cu-Zr, selected nominal stoichiometries ranging from Cu:Zr = 9:2 over 2:1 to 1:2 have been prepared by mixing the respective amounts of metallic Cu and Zr to yield different Cu-Zr bulk phases as initial catalyst structures. In addition, the methanol steam reforming performance of two Pd-Zr systems, that is, a bulk system with a nominal Pd:Zr = 2:1 stoichiometry and an inverse model system consisting of CVD-grown ZrOxHy layers on a polycrystalline Pd foil, has been comparatively assessed. While the CO2-selectivity and the overall catalytic performance of the Cu-Zr system is promising due to operando formation of a catalytically beneficial Cu-ZrO2 interface, the case for Pd-Zr is different. For both Pd-Zr systems, the low-temperature coking tendency, the high water-activation temperature and the CO2-selectivity spoiling inverse WGS reaction limit the use of the Pd-Zr systems for selective MSR applications, although alloying of Pd with Zr opens water activation channels to increase the CO2 selectivity.

  20. Selective cation exchange in the core region of Cu2-xSe/Cu2-xS core/shell nanocrystals.

    Science.gov (United States)

    Miszta, Karol; Gariano, Graziella; Brescia, Rosaria; Marras, Sergio; De Donato, Francesco; Ghosh, Sandeep; De Trizio, Luca; Manna, Liberato

    2015-09-30

    We studied cation exchange (CE) in core/shell Cu2-xSe/Cu2-xS nanorods with two cations, Ag(+) and Hg(2+), which are known to induce rapid exchange within metal chalcogenide nanocrystals (NCs) at room temperature. At the initial stage of the reaction, the guest ions diffused through the Cu2-xS shell and reached the Cu2-xSe core, replacing first Cu(+) ions within the latter region. These experiments prove that CE in copper chalcogenide NCs is facilitated by the high diffusivity of guest cations in the lattice, such that they can probe the whole host structure and identify the preferred regions where to initiate the exchange. For both guest ions, CE is thermodynamically driven as it aims for the formation of the chalcogen phase characterized by the lower solubility under the specific reaction conditions.

  1. Selective catalytic oxidation of cyclohexane over Cu/SBA-15 mesoporous catalyst%环己烷在Cu/SBA-15介孔催化剂上的选择性催化氧化

    Institute of Scientific and Technical Information of China (English)

    吕平; 孙尚屹; 包瑞新

    2013-01-01

    采用后嫁接法制备出了负载量为12%的Cu/SBA-15催化剂,借助N2吸附脱附、X射线衍射、透射扫描电子显微镜等分析检测方法表征了Cu/SBA-15催化剂的理化性质.在无任何有机溶剂及其他助剂的条件下,以空气为氧化剂使环己烷发生选择性氧化反应,评价了Cu/SBA-15催化剂的催化性能.结果表明,与SBA-15相比,Cu/SBA-15的比表面积、孔容等物理性能有所下降,能够很好地保持着SBA-15的介孔结构及长程有序性;SBA-15对环己烷的选择性氧化反应没有催化活性,Cu/SBA-15对环己烷的选择性氧化反应具有较强催化活性;使用Cu/SBA-15催化剂,环己烷转化率为41.72%,环己醇产率为14.12%,环己酮产率为27.6%.%Cu/SBA-15 (mass fraction of Cu 12%) supported catalyst was prepared by post-synthesis process and characterized by N2 adsorptiondesorption,X-ray diffraction and high resolution transmission electron microscopy.The behavior of the catalyst was evaluated through the selective catalytic oxidation of cyclohexane with air as oxidant in the absence of organic solvent and auxiliary agent.The results showed that Cu/SBA-15 maintained similar mesoporous structure and long-range order to SBA-15 and had lower specific surface area and pore volume compared to SBA-15.Cu/SBA-15 had higher catalytic activity and selectivity in the oxidation reaction of cyclohexane,but SBA-15 had no activity for the same reaction.In the presence of Cu/SBA-15,the conversion of cyclohexane was 41.72%,the yield of cyclohexanol was 14.12% and cyclohexanone 27.6%.

  2. A Comparative Study of N2O Formation during the Selective Catalytic Reduction of NOx with NH3 on Zeolite Supported Cu Catalysts

    Energy Technology Data Exchange (ETDEWEB)

    Chen, Hai-Ying; Wei, Zhehao; Kollar, Marton; Gao, Feng; Wang, Yilin; Szanyi, Janos; Peden, Charles HF

    2015-09-01

    A comparative study was carried out on a small-pore CHA.Cu and a large-pore BEA.Cu zeolite catalyst to understand the lower N2O formation on small-pore zeolite supported Cu catalysts in the selective catalytic reduction (SCR) of NOx with NH3. On both catalysts, the N2O yield increases with an increase in the NO2/NOx ratios of the feed gas, suggesting N2O formation via the decomposition of NH4NO3. Temperature-programmed desorption experiments reveal that NH4NO3 is more stable on CHA.Cu than on BEA.Cu. In situ FTIR spectra following stepwise (NO2 + O2) and (15NO + NH3 + O2) adsorption and reaction, and product distribution analysis using isotope-labelled reactants, unambiguously prove that surface nitrate groups are essential for the formation of NH4NO3. Furthermore, CHA.Cu is shown to be considerably less active than BEA.Cu in catalyzing NO oxidation and the subsequent formation of surface nitrate groups. Both factors, i.e., (1) the higher thermal stability of NH4NO3 on CHA.Cu, and (2) the lower activity for this catalyst to catalyze NO oxidation and the subsequent formation of surface nitrates, likely contribute to the higher SCR selectivity with less N2O formation on this catalyst as compared to BEA.Cu. The latter is determined as the primary reason since surface nitrates are the source that leads to the formation of NH4NO3 on the catalysts.

  3. Microstructure and property of sub-micro WC-10%Co particulate reinforced Cu matrix composites prepared by selective laser sintering

    Institute of Scientific and Technical Information of China (English)

    GU Dong-dong; SHEN Yi-fu; DAI Peng; YANG Ming-chuan

    2006-01-01

    The WC-10%Co particulate reinforced Cu matrix composite material with a WC-Co:Cu mass ratio of 20:80 was successfully fabricated by selective laser sintering(SLS) process. The following optimal processing parameters were used: laser power of 700 W, scan speed of 0.06 m/s, scan line spacing of 0.15 mm, and powder layer thickness of 0.3 mm. The microstructure,composition, and phase of the laser processed material were investigated by scanning electron microscopy(SEM), X-ray diffraction(XRD), and energy dispersive X-ray(EDX) spectroscopy. The results show that the bonding mechanism of this process is liquid phase sintering. The Cu and Co act as the binder phase, while the WC acts as the reinforcing phase. The non-equilibrium effects induced by laser melting, such as high degrees of undercooling and high solidification rate, result in the formation of a metastable phase CoC0.25. The WC reinforcing particulates typically have three kinds of morphology. They are agglomerated and undissolved, incompletely separated and partially dissolved, separated and dissolved, which indicates that particle rearrangement acts as the dominant sintering mechanism for the larger WC, while dissolution-precipitation prevails for the smaller WC particles.Microhardness tester was used to determine the Vickers hardness across the cross-section of the laser sintered sample, with the average value being HV0.1268.5. However, the hardness varied considerably, which might be attributed to the WC segregation and the high solidification rate experienced by the molten pool.

  4. Naphthalenediols: A new class of novel fluorescent chemosensors for selective sensing of Cu{sup 2+} and Ni{sup 2+} in aqueous solution

    Energy Technology Data Exchange (ETDEWEB)

    Kavitha, Ramasamy; Stalin, Thambusamy, E-mail: drstalin76@gmail.com

    2015-02-15

    Naphthalenediols(NDs) such as 1,5-naphthalenediol (1,5-ND) and 2,7-Naphthalenediol (2,7-ND) are found to be potent chemosensor for selective sensing of Cu{sup 2+} and Ni{sup 2+} ions respectively. The sensitivity and selectivity of chemosensors have been studied by incorporating NDs into β-Cyclodextrin (β-CD). The chemosensor behavior of NDs towards various transition metals is studied under selective pH medium. In 1,5-ND, the colorimetric chemosensor behavior has been identified and demonstrated in aqueous medium for the selective detection of Cu{sup 2+} without any modification, likewise 2,7-ND also having sensing ability towards Ni{sup 2+}. The chemosensor probe 1,5-ND showed selective chromogenic behavior towards Cu{sup 2+} ions by changing the colour from pink to purple. No significant colour change is observed upon the addition of other metal ions. The sensing property of naphthalenediols towards metal cations has been studied using UV–vis and fluorescence spectral technique. - highlights: • Naphthalenediols such as 1,5-naphthalenediol and 2,7-Naphthalenediol are acts as a chemosensor for selective sensing of Cu{sup 2+} and Ni{sup 2+} ions. • The binding constants were calculated. • The sensitivity and selectivity of chemosensors have been studied by incorporating 1,5-ND/2,7-ND into β-Cyclodextrin. • UV–vis and fluorescence spectral technique.

  5. A NEW INVENTION OF ALARM REMINDER LOCKING (ARL SECURITY SYSTEM

    Directory of Open Access Journals (Sweden)

    M.S.M. Effendi

    2016-02-01

    Full Text Available Alarm Reminder Locking (ARL Security System mainly focuses on a door security system, which can install in the door area to increase the security level for home, office room, hostel or other places. This system used Arduino Controller and Global System for Mobile Communication (GSM technology, which is the cheapest source to embed the security system to transmit the Short Message Service (SMS alert data. This device integrates three functions that are alarming, reminder and locked for a purpose of safety and connecting via mobile phone to remind the users through SMS. This device has a 3 modes of operation which is the system will be functional when the door is not improperly closed for the first reminder with the buzzer alert. The second mode is automated locked will be activated when users closed the door, but did not lock manually. Intrusion mode will activate while auto locked modes are interrupted without proper access. All this integrated system will provide high security access against intrusion occurrence. This security device will bring a new benefit to the user to consider about the userfriendly application, low power consumption and reasonable cost to install.

  6. Sistem Reminder Donor Darah dengan Memanfaatkan Teknologi Location Based Service

    Directory of Open Access Journals (Sweden)

    Ismail Abdus Shobar

    2016-11-01

    Full Text Available Donor darah merupakan kegiatan kemanusiaan yang bertujuan untuk membantu anggota masyarakat yang membutuhkan darah. Kegiatan donor darah diselenggarakan dan dikelola oleh Palang Merah Indonesia. Menurut catatan Palang Merah Indonesia, secara keseluruhan kebutuhan kantung darah yang tidak terpenuhi melebihi satu juta kantung darah. Untuk itu dibutuhkan peningkatan produksi kantung darah. Salah satu solusi yang dapat dilakukan adalah perancangan suatu sistem informasi geografis (GIS yang memudahkan pendonor untuk mendonorkan darahnya kembali dengan reminder donor darah dan membantu PMI mendapatkan kantung darah. Makalah ini membahas perancangan sistem reminder donor darah dengan menggunakan teknologi location based service. Kemudian untuk menguji sistem, dibuatkan sebuah prototype dengan hasil pengujian sistem menunjukkan bahwa sistem reminder donor darah dapat memudahkan pendonor dalam mendonorkan darahnya kembali sehingga memberikan motivasi bagi pendonor untuk lebih giat dalam mendonorkan darahnya. Sistem ini berpotensi meningkatkan produktivitas PMI dalam mengumpulkan kantong darah sehingga pemenuhan kebutuhan kantung darah masyarakat dapat meningkat yang pada akhirnya dapat menyelamatkan lebih banyak nyawa manusia khususnya di Indonesia. Kata kunci: donor darah, reminder, GIS, location based service.

  7. Immobilisation of Cu, Pb and Zn in Scrap Metal Yard Soil Using Selected Waste Materials.

    Science.gov (United States)

    Kamari, A; Putra, W P; Yusoff, S N M; Ishak, C F; Hashim, N; Mohamed, A; Isa, I M; Bakar, S A

    2015-12-01

    Immobilisation of heavy metals in a 30-year old active scrap metal yard soil using three waste materials, namely coconut tree sawdust (CTS), sugarcane bagasse (SB) and eggshell (ES) was investigated. The contaminated soil was amended with amendments at application rates of 0 %, 1 % and 3 % (w/w). The effects of amendments on metal accumulation in water spinach (Ipomoea aquatica) and soil metal bioavailability were studied in a pot experiment. All amendments increased biomass yield and reduced metal accumulation in the plant shoots. The bioconcentration factor and translocation factor values of the metals were in the order of Zn > Cu > Pb. The addition of ES, an alternative source of calcium carbonate (CaCO3), has significantly increased soil pH and resulted in marked reduction in soil metal bioavailability. Therefore, CTS, SB and ES are promising low-cost immobilising agents to restore metal contaminated land.

  8. Selective nonenzymatic bilirubin detection in blood samples using a Nafion/Mn-Cu sensor.

    Science.gov (United States)

    Noh, Hui-Bog; Won, Mi-Sook; Shim, Yoon-Bo

    2014-11-15

    The specific detection of biological organics without the use of an enzyme is challenging, and it is crucial for analytical and clinical chemistry. We report specific nonenzymatic bilirubin detection through the catalytic oxidation of bilirubin molecule on the Nafion/Mn-Cu surface. The catalytic ability, true surface area, morphology, crystallinity, composition, and oxidation state of the sensor surface were assessed using voltammetry, coulometry, XPS, XRD, Brunauer-Emmett-Teller (BET), SEM, EDXS, and TOF-SIMS experiments. The results showed that the surface was composed of microporous Mn-Cu bimetallic crystal in flake shape with a large BET surface area (3.635 m(2)g(-1)), where the surface area and crystallinity mainly affected the sensor performance. Product analysis of the catalytic reaction on the sensor probe revealed a specific two-electron oxidation of dipyrromethane moiety to dipyrromethene in the bilirubin molecule. Experimental variables affecting the analysis of bilirubin were optimized in terms of probe composition, temperature, pH, and potential. At the optimized condition, the dynamic range was between 1.2 μM and 0.42 mM, which yielded the equation of ΔI (μA)=(1.03 ± 0.72)+(457.0 ± 4.03) [C] (mM) with 0.999 of correlation coefficient, and the detection limit was 25.0 ± 1.8 nM (n=5, k=3). The stability test, interference effects, and analysis of real clinical samples, human whole blood and certified serum samples were demonstrated to confirm the reliability of the proposed bilirubin sensor.

  9. Chelation therapy in Wilson's disease: from D-penicillamine to the design of selective bioinspired intracellular Cu(I) chelators.

    Science.gov (United States)

    Delangle, Pascale; Mintz, Elisabeth

    2012-06-01

    Wilson's disease is an orphan disease due to copper homeostasis dysfunction. Mutations of the ATP7B gene induces an impaired functioning of a Cu-ATPase, impaired Cu detoxification in the liver and copper overload in the body. Indeed, even though copper is an essential element, which is used as cofactor by many enzymes playing vital roles, it becomes toxic when in excess as it promotes cytotoxic reactions leading to oxidative stress. In this perspective, human copper homeostasis is first described in order to explain the mechanisms promoting copper overload in Wilson's disease. We will see that the liver is the main organ for copper distribution and detoxification in the body. Nowadays this disease is treated life-long by systemic chelation therapy, which is not satisfactory in many cases. Therefore the design of more selective and efficient drugs is of great interest. A strategy to design more specific chelators to treat localized copper accumulation in the liver will then be presented. In particular we will show how bioinorganic chemistry may help in the design of such novel chelators by taking inspiration from the biological copper cell transporters.

  10. Rapid Directional Solidification with Ultra-High Temperature Gradient and Cellular Spacing Selection of Cu-Mn Alloy

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    The detailed laser surface remelting experiments of Cu-31.4 wt pct Mn and Cu-26.6 wt pct Mn alloys on a 5 kW CO2laser were carried out to study the effects of processing parameters (scanning velocity, output power of laser) on the growthdirection of microstructure in the molten pool and cellular spacing selection under the condition of ultra-high temperaturegradient and rapid directional solidification. The experimental results show that the growth direction of microstructure isstrongly affected by laser processing parameters. The ultra-high temperature gradient directional solidification can be realizedon the surface of samples during laser surface remelting by controlling laser processing parameters, the temperature gradientand growth velocity can reach 106 K/m and 24.1 mm/s, respectively, and the solidification microstructure in the center ofthe molten pool grows along the laser beam scanning direction. There exists a distribution range of cellular spacings underthe laser rapid solidification conditions, and the average spacing decreases with increasing of growth rate. The maximum,λ minimum, λmin, and average primary spacing,λ, as functions of growth rate, Vb, can be given by, λ =12.54V b-0.61,λmin=4.47 Vb-0.52, λ=9.09Vb-0.62, respectively. The experimental results are compared with the current Hunt-Lu model forrapid cellular/dendritic growth, and a good agreement is found.

  11. A Partially Fluorinated, Water-Stable Cu(II)-MOF Derived via Transmetalation: Significant Gas Adsorption with High CO2 Selectivity and Catalysis of Biginelli Reactions.

    Science.gov (United States)

    Pal, Tapan K; De, Dinesh; Senthilkumar, S; Neogi, Subhadip; Bharadwaj, Parimal K

    2016-08-15

    A partially fluorinated, angular tetracarboxylic acid linker (H4L) incorporating a pendant amine moiety forms a three-dimensional Zn(II) framework, 1. The structure consists of paddle-wheel Zn2(CO2)4 secondary building units (SBUs) and Zn12(CO2)24 supramolecular building blocks (SBBs). Thermal stability of 1 is found to be low. However, it undergoes transmetalation reaction with Cu(II) at room temperature without losing crystallinity affording an isostructural framework, 1Cu. Framework 1Cu is thermally robust and allows generation of the solvent-free porous framework 1Cu' upon activation with coordinatively unsaturated metal centers. Framework 1Cu' exhibits water stability and at 77 K, adsorbs 2.56 wt % of H2 up to 1 bar that significantly increases to 4.01 wt % at 13 bar. Also, this framework gives a high adsorption of 164.70 cc/g of CH4 (11.7 wt %) at 303 K and 60 bar. The channel surfaces decorated with -NH2 group and unsaturated metal centers in 1Cu' allow a promising 36.4 wt % of CO2 adsorption at 1 bar and 273 K. Moreover, it exhibits pronounced selectivity of CO2 adsorption over N2 and H2 at 273 K. Finally, the versatility of 1Cu' is shown by its excellent heterogeneous catalytic activity in the Biginelli coupling reactions involving an aldehyde, urea, and ethylacetoacetate to afford dihydroprimidinones.

  12. Sulfonate group-modified FePtCu nanoparticles as a selective probe for LDI-MS analysis of oligopeptides from a peptide mixture and human serum proteins.

    Science.gov (United States)

    Kawasaki, Hideya; Akira, Tarui; Watanabe, Takehiro; Nozaki, Kazuyoshi; Yonezawa, Tetsu; Arakawa, Ryuichi

    2009-11-01

    Bare FePtCu nanoparticles (NPs) are first prepared for laser desorption/ionization mass spectroscopy (LDI-MS) analysis as affinity probes to selectively trap oppositely charged analytes from a sample solution. Our present results demonstrate bare FePtCu NPs to be a potentially useful matrix for surface-assisted laser desorption/ionization mass spectroscopy (SALDI-MS), for the analysis of small proteins and peptides. The upper detectable mass range of peptides was approximately 5 kDa, and the detection limit for peptides approximately 5 fmol. Sulfonate group-modified FePtCu nanoparticles (FePtCu-SO(3)(-) NPs), with ionization being independent of the solution pH, can interact with a positively charged analyte, and the analyte-bound NPs can be separated from the reaction supernatant by centrifugation or an external magnetic field. An oligopeptide, Gly-Gly-Tyr-Arg (GGYR) from an oligopeptide mixture containing Asp-Asp-Asp-Asp (DDDD), Gly-Gly-Gly-Gly (GGGG) and GGYR, was detected using SALDI-MS with FePtCu-SO(3)(-) NPs employing electrostatic interaction. Furthermore, FePtCu-SO(3)(-) NPs can detect lysozyme (Lyz) in human serum through the electrostatic attraction between positively charged Lyz and FePtCu-SO(3)(-) NPs at pH 8, while detection of negatively charged albumin in human serum is not possible.

  13. Preparation of a core-shell magnetic ion-imprinted polymer via a sol-gel process for selective extraction of Cu(II) from herbal medicines.

    Science.gov (United States)

    He, Huan; Xiao, Deli; He, Jia; Li, Hui; He, Hua; Dai, Hao; Peng, Jun

    2014-05-21

    A novel magnetic surface ion-imprinted polymer (c-MMWCNTs-SiO2-IIP) was synthesized for the first time using magnetic CNTs/Fe3O4 composites (c-MMWCNTs) as the core, 3-ammonium propyltriethoxysilane (APTES) as the functional monomer, tetraethylorthosilicate (TEOS) as the cross-linker and Cu(II) as the template. c-MMWCNTs-SiO2-IIP was evaluated for selective extraction of Cu(II) from herbal medicines via a magnetic solid phase extraction (M-SPE) procedure. One factor affecting the separation and preconcentration of the target heavy metal was pH. Under the optimized experimental conditions, the adsorption kinetics and adsorption capacity of c-MMWCNTs-SiO2-IIP toward Cu(II) were estimated. The results indicated that the adsorption mechanism corresponds to a pseudo-second order adsorption process, with a correlation coefficient (R(2)) of 0.985 and a maximum adsorption capacity of 42.2 mg g(-1). The relative selectivity factor (β) values of Cu(II)/Zn(II) and Cu(II)/Pb(II) were 38.5 and 34.5, respectively. c-MMWCNTs-SiO2-IIP, combined with flame atomic absorption spectrometry, was successfully applied in the extraction and detection of Cu(II) in herbal medicine, with high recoveries ranging from 95.6% to 108.4%.

  14. Solution-Processed CuS NPs as an Inorganic Hole-Selective Contact Material for Inverted Planar Perovskite Solar Cells.

    Science.gov (United States)

    Rao, Haixia; Sun, Weihai; Ye, Senyun; Yan, Weibo; Li, Yunlong; Peng, Haitao; Liu, Zhiwei; Bian, Zuqiang; Huang, Chunhui

    2016-03-01

    Organic-inorganic hybrid perovskite solar cells (PSCs) have drawn worldwide intense research in recent years. Herein, we have first applied another p-type inorganic hole-selective contact material, CuS nanoparticles (CuS NPs), in an inverted planar heterojunction (PHJ) perovskite solar cell. The CuS NP-modification of indium tin oxide (ITO) has successfully tuned the surface work function from 4.9 to 5.1 eV but not affect the surface roughness and transmittance, which can effectively reduce the interfacial carrier injection barrier and facilitate high hole extraction efficiency between the perovskite and ITO layers. After optimization, the maximum power conversion efficiency (PCE) has been over 16% with low J-V hysteresis and excellent stability. Therefore, the low-cost solution-processed and stable CuS NPs would be an alternative interfacial modification material for industrial production in perovskite solar cells.

  15. A sensitive fluorescent sensor for selective determination of dichlorvos based on the recovered fluorescence of carbon dots-Cu(II) system.

    Science.gov (United States)

    Hou, Juying; Dong, Guangjuan; Tian, Zhengbin; Lu, Jiutian; Wang, Qianqian; Ai, Shiyun; Wang, Minglin

    2016-07-01

    In this paper, a simple and sensitive fluorescent sensor for dichlorvos was first constructed based on carbon dots-Cu(II) system. These carbon dots were obtained by simple hydrothermal reaction of feather. The fluorescence of these carbon dots can be selectively quenched by Cu(2+) ion. When acetylcholinesterase and acetylthiocholine were introduced into the system, thiocholine came into being, which can react with Cu(2+) ion and restore the fluorescence of the system. The reaction mechanism between Cu(2+) ion and thiocholine was confirmed by X-ray photoelectron spectroscopy. As one kind of acetylcholinesterase inhibitor, organophosphorus pesticides can be detected based on this sensing system. As an example of organophosphorus pesticides, dichlorvos was detected with a linear range of 6.0×10(-9)-6.0×10(-8)M. This sensing system has been successfully used for the analysis of cabbage and fruit juice samples.

  16. Cu(II)-vitamin D interaction leads to free radical-mediated cellular DNA damage: a novel putative mechanism for its selective cytotoxic action against malignant cells.

    Science.gov (United States)

    Rizvi, Asim; Chibber, Sandesh; Naseem, Imrana

    2015-03-01

    Vitamin D (vit D) is a known anticancer molecule, and cancer cells are reported to have elevated levels of Cu(II) ions. In this study, we show that interaction of vit D and Cu(II) leads to the formation of hydroxyl free radicals, superoxide anion and hydrogen peroxide, which causes severe oxidative stress, selectively in malignant cells. We show that the production of these reactive oxygen species causes cellular DNA fragmentation which may cause cell death. A novel putative chemical mechanism explaining how vit D causes cell death by DNA damage, selectively in malignant cells, is proposed.

  17. The activity and selectivity of catalytic peroxide oxidation of chlorophenols over Cu-Al hydrotalcite/clay composite.

    Science.gov (United States)

    Zhou, Shiwei; Gu, Chuantao; Qian, Zhenying; Xu, Jinguang; Xia, Chuanhai

    2011-05-15

    Liquid phase catalytic oxidation of chlorophenols (CPs) was carried out over Cu-Al hydrotalcite/clay composite at ambient temperature and pressure using hydrogen peroxide as oxidant. The results showed that the catalyst had high catalytic activity, with complete oxidation of 4-CP within 40 min at 40 °C. The content and position of chlorine on the aromatic ring had significantly different effects on the oxidation rate of CPs, with the rate sequence of phenol > monochlorophenol (MCP) > dichlorophenol (DCP) > trichlorophenol (TCP), 3-CP > 2-CP > 4-CP, and 3,5-DCP > 3,4-DCP > 2,5-DCP > 2,4-DCP > 2,6-DCP. This was ascribed to the interactions among σ-electron withdrawing conductive effect, π-electron donating conjugative effect, and steric hindrance effect of chlorine. It was evidenced that the catalytic peroxide oxidation of CPs in the first step was selective and rate-limiting, where chlorinated 1,4-benzoquinones formed.

  18. Influence of the selected alloy additions on limiting the phase formation in Cu-Zn alloys

    Directory of Open Access Journals (Sweden)

    J. Kozana

    2010-01-01

    Full Text Available Influence of the selected alloy additions into copper and zinc alloys was investigated in order to find out the possibility of limiting the precipitation of unfavourable phase . The observation of microstructures and strength tests were performed. The results of metallographic and strength investigations indicate positive influence of small amounts of nickel, cobalt or tellurium. The precise determination of the influence of the selected alloy additions on limiting the gamma phase formation will be the subject of further examinations.

  19. FRACTIONATION OF SELECTED HEAVY METALS (Zn, Ni, Cu IN MUNICIPAL SEWAGE SLUDGES FROM PODLASIE PROVINCE

    Directory of Open Access Journals (Sweden)

    Adam Łukowski

    2017-05-01

    Full Text Available In the samples of fresh dehydrated sewage sludges from municipal treatment plants in Grajewo, Bielsk Podlaski, Sokółka, Dąbrowa Białostocka, Knyszyn, Mońki, Augustów, Suwałki, Sejny and Suchowola the following determinations were made: pH, pseudo-total content of Zn, Ni and Cu, organic matter and dry mass. The contents of above-mentioned elements in fractions were evaluated using modified BCR method (four fractions: F1-acid soluble and exchangeable, F2-reducible, F3-oxidizable, F4-residual. The zinc content (mean values in particular fractions can be arranged quantitatively in a sequence: F3 (60.8 % > F2 (20.0% > F4 (19.9% > F1 (3.9%, in the case of nickel: F3 ( 48.6% > F2 (25.2% > F4 (25.1% > F1 (5.6% and in the case of copper: F4 (66.3% > F3 (35.3% > F1 (4.2% > F2 (3.0%. Cumulative content of zinc in mobile fractions (F1+F2+F3 ranged from 76.0 to 93.3%; for nickel from 56.3 to 89.6% and for copper from 28.8 to 53.3% of pseudo-total content.

  20. 75As, 63Cu NMR and NQR characterization of selected arsenic minerals.

    Science.gov (United States)

    Lehmann-Horn, J A; Miljak, D G; Bastow, T J

    2013-01-01

    The direct measurement and identification of solid state arsenic phases using (75)As NMR is made difficult by the simultaneous conditions of large quadrupole moment and low coordination symmetry in many compounds. However, specific arsenic minerals can efficiently be detected and discriminated via nuclear quadrupolar resonance (NQR). We report on the first NMR and NQR measurements in the natural minerals enargite (Cu3AsS4), niccolite (NiAs), arsenopyrite (FeAsS) and loellingite (FeAs2). The NQR frequencies have been determined from both high-field NMR powder patterns and via zero-field frequency sweeps. Density functional theory (DFT) based ab initio calculations support the experimental results. The compounds studied here are common in terms of the known set of As-containing minerals. They are sometimes encountered in the context of base metal or gold mining. The study represents a significant addition to the list of arsenic minerals that can now be detected with NQR techniques.

  1. Cu/MgAl(2)O(4) as bifunctional catalyst for aldol condensation of 5-hydroxymethylfurfural and selective transfer hydrogenation.

    Science.gov (United States)

    Pupovac, Kristina; Palkovits, Regina

    2013-11-01

    Copper supported on mesoporous magnesium aluminate has been prepared as noble-metal-free solid catalyst for aldol condensation of 5-hydroxymethylfurfural with acetone, followed by hydrogenation of the aldol condensation products. The investigated mesoporous spinels possess high activity as solid-base catalysts. Magnesium aluminate exhibits superior activity compared to zinc and cobalt-based aluminates, reaching full conversion and up to 81 % yield of the 1:1 aldol product. The high activity can be correlated to a higher concentration of basic surface sites on magnesium aluminate. Applying continuous regeneration, the catalysts can be recycled without loss of activity. Focusing on the subsequent hydrogenation of aldol condensation products, Cu/MgAl2 O4 allows a selective hydrogenation and CO bond cleavage, delivering 3-hydroxybutyl-5-methylfuran as the main product with up to 84 % selectivity avoiding ring saturation. Analysis of the hydrogenation activity reveals that the reaction proceeds in the following order: CC>CO>CO cleavage>ring hydrogenation. Comparable activity and selectivity can be also achieved utilizing 2-propanol as solvent in the transfer hydrogenation, providing the possibility for partial recycling of acetone and optimization of the hydrogen management.

  2. Investigation of Cu(II) Binding to Bovine Serum Albumin by Potentiometry with an Ion Selective Electrode

    Science.gov (United States)

    Jie Liu

    2004-01-01

    A laboratory project that investigates Cu(II) bind to bovine serum albumin (BSA) in an aqueous solution is developed to assist undergraduate students in gaining better understanding of the interaction of ligands with biological macromolecule. Thus, students are introduced to investigation of Cu(II) binding to BSA by potentiometry with the Cu(II)…

  3. Selective epitaxial growth of sub-micron structures of YBaCuO by substrate modification

    NARCIS (Netherlands)

    Blank, Dave H.A.; Damen, Cas A.J.; Kropman, Boike L.; Rogalla, Horst

    1994-01-01

    Sub-micron structures of high-Tc thin films have been realized with Selective Epitaxial Growth (SEG). Two different techniques to achieve SEG have been studied. First, narrow trenches down to 100 nm are etched into the substrate with a four-layer E-beam lithography technique. Second, amorphous metal

  4. Emotional contrast or compensation? How support reminders influence the pain of acute peer disapproval in preadolescents

    NARCIS (Netherlands)

    Thomaes, S.; Sedikides, C.; Reijntjes, A.; Brummelman, E.; Bushman, B.J.

    2015-01-01

    When children experience habitual peer difficulties, adults often remind them that many people care about them. How do such reminders of support impact children’s emotional responses to acute experiences of peer disapproval? Intuitively, support reminders would exert compensatory effects attenuating

  5. The Effects of a Single Reminder Trial on Retention of a Motor Skill

    Science.gov (United States)

    Fairbrother, Jeffrey T.; Shea, John B.

    2005-01-01

    Two experiments investigated the effects of a single reminder trial on immediate and delayed retention. Experiment 1 determined if beneficial effects of a reminder mat were a function of task order. Immediate retention performance benefited only when the reminder trial was practiced in the first block of trials. Experiment 2 added a 24-hr delayed…

  6. Highly selective hydrogenation of CO2 to methanol over CuO-ZnO-ZrO2 catalysts prepared by a surfactant-assisted co-precipitation method

    Science.gov (United States)

    Li, Li; Mao, Dongsen; Yu, Jun; Guo, Xiaoming

    2015-04-01

    A series of CuO-ZnO-ZrO2 catalysts are synthesized by a surfactant-assisted co-precipitation method and tested for the synthesis of methanol from CO2 hydrogenation. The effects of calcination temperature on the physicochemical properties of as-prepared catalysts are investigated extensively by TG-DSC, N2 adsorption/desorption, XRD, N2O chemisorption, SEM/TEM, EDX, XPS, TPR, H2-TPD and CO2-TPD techniques. The results show that the size of copper particles increases with the increase in calcination temperature, leading to the decrease in turnover frequency (TOF) for methanol formation. Moreover, compared with the counterparts prepared by the conventional co-precipitation method, the CuO-ZnO-ZrO2 catalysts prepared by this novel method show significantly high methanol selectivity. The superior property of the prepared CuO-ZnO-ZrO2 catalyst can be attributed to the formation of more amounts of Cu-ZnOx and/or Cu-ZrOx species resulted from the homogeneous element distribution, intimate interface contact of Cu species with ZnO and/or ZrO2, and to porous structure with larger pore size.

  7. Electronic nursing care reminders: implications for nursing leaders.

    Science.gov (United States)

    Piscotty, Ronald J; Kalisch, Beatrice; Gracey-Thomas, Angel; Yarandi, Hossein

    2015-05-01

    The aim of this study is to report the results of a replication study of the relationship between self-reported nursing care reminder (NCR) use and missed nursing care. A descriptive cross-sectional correlational design was used. The sample (N = 124) was composed of medical/surgical and ICU RNs working on acute care hospital units in a large Midwestern teaching hospital. The MISSCARE Survey, Nursing Care Reminders Usage Survey, and the Impact of Health Care Information Technology Survey were used to collect data. Adjusted hierarchical multiple regression was used to determine study outcomes. Nurses who use NCRs more frequently have decreased reports of missed nursing care. Nurses who perceive the impact of healthcare technology as positive on their practice also have decreased missed nursing care. The results of this study suggest that NCRs are an effective intervention to decrease missed nursing care in acute care hospitals.

  8. Selective adsorption of protein by a high-efficiency Cu(2+) -cooperated magnetic imprinted nanomaterial.

    Science.gov (United States)

    Shi, Lu; Tang, Yuhai; Hao, Yi; He, Gaiyan; Gao, Ruixia; Tang, Xiaoshuang

    2016-07-01

    We report a core-shell magnetic molecularly imprinted polymer with high affinity through a facile sol-gel method for the selective adsorption of bovine hemoglobin from real bovine blood. Copper ions grafted on the surface of the matrix could immobilize template protein through chelation, which greatly enhances the orderliness of imprinted cavities and affinity of polymers. The obtained products exhibit a desired level of magnetic susceptibility, resulting in the highly efficient adsorption process. The results of adsorption experiments show that the saturation adsorption capacity of imprinted products could reach 116.3 mg/g within 30 min. Meanwhile, the specific binding experiment demonstrates the high selectivity of polymers for bovine hemoglobin. Furthermore, satisfactory reusability is demonstrated by ten adsorption-desorption cycles with no obvious deterioration in binding capacity. Electrophoretic analysis suggests the polymer could be used successfully in separation and enrichment of bovine hemoglobin from the bovine blood sample, which exhibits potential application in pretreatment of proteomics.

  9. Synergy of CuO and CeO2 combination for mercury oxidation under low-temperature selective catalytic reduction atmosphere

    KAUST Repository

    Li, Hailong

    2016-07-19

    Synergy for low temperature Hg0 oxidation under selective catalytic reduction (SCR) atmosphere was achieved when copper oxides and cerium oxides were combined in a CuO-CeO2/TiO2 (CuCeTi) catalyst. Hg0 oxidation efficiency as high as 99.0% was observed on the CuCeTi catalyst at 200 °C, even the gas hourly space velocity was extremely high. To analyze the synergistic effect, comparisons of catalyst performance in the presence of different SCR reaction gases were systematically conducted over CuO/TiO2 (CuTi), CeO2/TiO2 (CeTi) and CuCeTi catalysts prepared by sol-gel method. The interactions between copper oxides and cerium oxides in CuCeTi catalyst yielded more surface chemisorbed oxygen, and facilitated the conversion of gas-phase O2 to surface oxygen, which are favorable for Hg0 oxidation. Copper oxides in the combination interacted with NO forming more chemisorbed oxygen for Hg0 oxidation in the absence of gas-phase O2. Cerium oxides in the combination promoted Hg0 oxidation through enhancing the transformations of NO to NO2. In the absence of NO, NH3 exhibited no inhibitive effect on Hg0 oxidation, because enough Lewis acid sites due to the combination of copper oxides and cerium oxides scavenged the competitive adsorption between NH3 and Hg0. In the presence of NO, although NH3 lowered Hg0 oxidation rate through inducing reduction of oxidized mercury, complete recovery of Hg0 oxidation activity over the CuCeTi catalyst was quickly achieved after cutting off NH3. This study revealed the synergistic effect of the combination of copper oxides and cerium oxides on Hg0 oxidation, and explored the involved mechanisms. Such knowledge would help obtaining maximum Hg0 oxidation co-benefit from SCR units in coal-fired power plants.

  10. Selectively leaching Cu(Ⅱ) and Ni(Ⅱ) from acid mine drainage sludge by using ethylenediamine-ammonium sulfate

    Institute of Scientific and Technical Information of China (English)

    2002-01-01

    A method based on controlling the complexation-precipitation equilibrium of metal ions was proposed to selectively recover nickel and copper from hydroxide sludge formed by lime neutralization of acid mine drainage(AMD). Ethylenediamine(EDA) and ammonium sulfate were chosen as complex reagent and precipitating reagent, respectively, to dissolve target metal hydroxides from sludge and limit useless metal ions in the pregnant solution. Results from both synthetic and natural samples show the excellent selectivity for the target metals(copper and nickel) against Fe(Ⅲ), Ca(Ⅱ) and Mg(Ⅱ), 99% recovery of Cu(Ⅱ) and Ni(Ⅱ) and shorter leaching time can be reached by this process, and the resultant solution can be used for direct electrowinning. The optimum operating conditions are: pH=9~11, ρ(EDA)=40g/L, ammonium sulfate 50g/L, leaching time 5h(for natural sample) and 2.5h(for synthetic sludge), liquid to solid ratio being 4 with mechanical stirring at room temperature.

  11. Cu{sub 1.5}Mn{sub 1.5}O{sub 4}-based ceramic spectrally selective coatings for efficient solar absorber applications

    Energy Technology Data Exchange (ETDEWEB)

    Ma, Pengjun [State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000 (China); University of Chinese Academy of Sciences, Beijing, 100049 (China); Geng, Qingfen; Gao, Xianghu [Research & Development Center for Eco-material and Eco-chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000 (China); Yang, Shengrong [State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000 (China); Liu, Gang, E-mail: gangliu@licp.cas.cn [Research & Development Center for Eco-material and Eco-chemistry, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000 (China)

    2016-08-05

    Cu{sub 1.5}Mn{sub 1.5}O{sub 4}-based ceramic spectrally selective (CSS) coating was deposited on aluminum substrate using a sol–gel dip-coating method. The citric acid introduced in the precursor system lowered the required calcining temperature of crystalline Cu{sub 1.5}Mn{sub 1.5}O{sub 4}. X-Ray diffraction (XRD) peaks of coatings annealed above 450 °C were found to coincide exactly with that of crystalline Cu{sub 1.5}Mn{sub 1.5}O{sub 4} in JCPDS database. By optimizing the withdrawal rate and calcining temperature, coating with spectral selectivity as good as α{sub s} = 0.876 and ε{sub 100} = 0.057 was achieved after only one dipping/annealing cycle. Subjected to an accelerated ageing test at 259 °C, the obtained CSS coating showed an excellent thermally durability with the performance criterion (PC) values below 0.05. - Highlights: • Cu{sub 1.5}Mn{sub 1.5}O{sub 4}-based CSS coating is achieved after only one dipping/annealing cycle. • Cu{sub 1.5}Mn{sub 1.5}O{sub 4} coating is obtained as the annealing temperature reaches to 450 °C. • Cu{sub 1.5}Mn{sub 1.5}O{sub 4} coating exhibits optical parameter: α{sub s} = 0.876 and ε{sub 100} = 0.057. • Cu{sub 1.5}Mn{sub 1.5}O{sub 4} coating shows the excellent stability in low to mid temperature region.

  12. Enhancement in CO2 Adsorption Capacity and Selectivity in the Chalcogenide Aerogel CuSb2S4 by Post-synthetic Modification with LiCl

    KAUST Repository

    Ahmed, Ejaz

    2015-09-11

    The new chalcogel CuSb2S4 was obtained by reacting Cu(OAc)2·H2O with KSbS2 in a water/formamide mixture at room temperature. In order to modify the gas adsorption capacity the synthesized CuSb2S4 aerogel was loaded with different amounts of LiCl. CO2 adsorption measurements on the CuSb2S4 aerogel before and after treatment with LiCl showed more than three times increased uptake of the LiCl-modified chalcogel. The selectivities of the gas pairs CO2/H2 and CO2/CH4 in the LiCl-treated chalcogel are 235 and 105 respectively and amongst the highest reported for chalcogenide-based aerogels. In comparison with other porous materials like zeolites, activated carbon and most of the Metal Organic Frameworks (MOFs) or Porous Organic Frameworks (POFs), our synthesized aerogels show good air and moisture stability. Although, the CO2 storage capacity of our aerogels is relatively low, however the selectivity of CO2 over H2 or CH4 in LiCl-loaded aerogels are higher than in zeolites, activated carbon as well as some MOFs like Cu-BTC and MOF-5 etc.

  13. A new rhodamine based ‘turn-on’ Cu²⁺ ion selective chemosensor in aqueous system applicable in bioimaging

    Indian Academy of Sciences (India)

    ABHISHEK MAJI; SOMENATH LOHAR; SIDDHARTHA PAL; PABITRA CHATTOPADHYAY

    2017-09-01

    Anewrhodamine-based Schiff base (L) has been synthesized and characterized by physicochemical and spectroscopic tools. This organic molecule selectively reacts with Cu²⁺ ions with a remarkably significant optical change, which supports the development of a chemosensor for Cu²⁺ ions as low as nanomolar level in aqueous medium. On the basis of the experimental work, the ‘turn-on’ colorimetric/fluorimetric spectroscopic change is due to Cu²⁺ ion-assisted hydrolysis followed by spirolactam ring opening of the probe (L) in 20mM HEPES buffer [pH 7.4; water/acetonitrile (9:1 v/v)]. The competitive ions do not affect the selectivity and specificity of the probe (L) in the detection of Cu²⁺ ions. The cell imaging study using fluorescence microscope showed that this non-cytotoxic probe is useful to detect the distribution of Cu²⁺ ions in AGS cells lines.

  14. Cu(I)/Cu(II) templated functional pseudorotaxanes and rotaxanes

    Indian Academy of Sciences (India)

    Subrata Saha; Pradyut Ghosh

    2012-11-01

    Threaded complexes like pseudorotaxanes, rotaxanes based on Cu(I)/Cu(II) ions have shown to be promising for the construction of mechanically interlocked molecular-level architectures. In this short review, we focus on the synthetic strategies developed to construct pseudorotaxanes and rotaxanes using Cu(I)/Cu(II) ions as template. Further, brief discussions on chemical and mechanical properties associated with some of the selected to Cu(I)/Cu(II) based pseudorotaxanes and rotaxanes are presented.

  15. A turn-on fluorescent rhodamine-acyl hydrazide for selective detection of Cu{sup 2+} ions

    Energy Technology Data Exchange (ETDEWEB)

    Yoon, Jung Won; Jeong, Hyuk; Lee, Min Hee [Dept. of Chemistry, Sookmyung Women' s University, Seoul (Korea, Republic of)

    2017-03-15

    We present a rhodamine-based probe that can detect Cu{sup 2+} ions via Cu{sup 2+}-promoted hydrolysis in aqueous solutions. In solution, the probe is non-fluorescent and colorless, but gives a strong fluorescence at 586 nm and shows a color change to pink on the addition of Cu{sup 2+} ions. We demonstrate that the rhodamine-based probe undergoes Cu{sup 2+}-promoted hydrolysis with a moderate reaction time (within 3 min) and provides a fluorescence off–on change, even in the presence of other competitive metal ions. The rhodamine-based probe shows a linear correlation between increasing fluorescence at 586 nm and the Cu{sup 2+} concentration, and can detect Cu{sup 2+} at nanomolar levels (10 nM) in CH{sub 3}CN:H{sub 2}O (v/v, 90:10)

  16. Returning to the scene: reminders and context reinstatement enhance children's recall.

    Science.gov (United States)

    Priestley, G; Roberts, S; Pipe, M E

    1999-07-01

    Two studies examined the efficacy of context reinstatement as a reminder in enhancing 5- to 7-year-old children's recall. In Experiment 1, children who had been interviewed shortly after an event were reinterviewed 6 months later. Children exposed to a context reminder 24 hr before the 6-month interview and children interviewed in the event context did not differ but reported significantly more information in a verbal interview than children receiving a standard interview. A control group experienced the reminder but not the event and established that the effects of the reminder were not due to new learning. There was no effect of the reminder on accuracy and no effect in reenactment. In Experiment 2, children were interviewed for the first time after 6 months, and effects of the reminder were found for both verbal recall and reenactment. Nonverbal reminders may effectively enhance the amount of information children report without decreasing accuracy.

  17. Generation of Cu–In alloy surfaces from CuInO2 as selective catalytic sites for CO2 electroreduction

    KAUST Repository

    Jedidi, Abdesslem

    2015-08-11

    The lack of availability of efficient, selective and stable electrocatalysts is a major hindrance for scalable CO2 reduction processes. Herein, we report the generation of Cu–In alloy surfaces for electrochemical reduction of CO2 from mixed metal oxides of CuInO2 as the starting material. The material successfully generates selective active sites to form CO from CO2 electroreduction at mild overpotentials. Density functional theory (DFT) indicates that the site occupation of the inert In occurs more on the specific sites of Cu. In addition, while In atoms do not preferentially adsorb H or CO, Cu atoms, which neighbor the In atoms, alters the preference of their adsorption. This preference for site occupation and altered adsorption may account for the improved selectivity over that observed for Cu metal. This study demonstrates an example of a scalable synthesis method of bimetallic surfaces utilized with the mixed oxide precursor having the diversity of metal choice, which may drastically alter the electrocatalytic performance, as presented herein.

  18. In situ scanning tunneling microscopy study of selective dissolution of Au{sub 3}Cu and Cu{sub 3}Au (0 0 1)

    Energy Technology Data Exchange (ETDEWEB)

    Renner, Frank Uwe [Max-Planck-Institut fuer Eisenforschung, Max-Planck-Str.1, Duesseldorf 40237 (Germany); Eckstein, Gerald Andreas [Universitaet Erlangen-Nuernberg, Martensstrasse 7, D-91058 Erlangen (Germany); Lymperakis, Liverios [Max-Planck-Institut fuer Eisenforschung, Max-Planck-Str.1, Duesseldorf 40237 (Germany); Dakkouri-Baldauf, Andrea [Universitaet Erlangen-Nuernberg, Martensstrasse 7, D-91058 Erlangen (Germany); Rohwerder, Michael, E-mail: m.rohwerder@mpie.d [Max-Planck-Institut fuer Eisenforschung, Max-Planck-Str.1, Duesseldorf 40237 (Germany); Neugebauer, Joerg; Stratmann, Martin [Max-Planck-Institut fuer Eisenforschung, Max-Planck-Str.1, Duesseldorf 40237 (Germany)

    2011-01-15

    We present an electrochemical study of Au{sub 3}Cu (0 0 1) single crystal surfaces in 0.1 mol dm{sup -3} H{sub 2}SO{sub 4} and 0.1 mol dm{sup -3} H{sub 2}SO{sub 4} + 0.1 mmol dm{sup -3} HCl, and of Cu{sub 3}Au (0 0 1) in 0.1 mol dm{sup -3} H{sub 2}SO{sub 4}. The focus is on in situ scanning tunneling microscopy experiments. The changes of the surface morphology, which are time- and potential-dependent, have been observed, clearly resolving single atomic steps and mono-atomic islands and pits. Chloride additives enhance the surface diffusion and respective morphologies are observed earlier. All surfaces have shown considerable roughening already in the passive region far below the critical potential.

  19. The use of a polymer inclusion membrane in a paper-based sensor for the selective determination of Cu(II).

    Science.gov (United States)

    Jayawardane, B Manori; Coo, Lilibeth dlC; Cattrall, Robert W; Kolev, Spas D

    2013-11-25

    A disposable paper-based sensor (PBS) is described for the determination of Cu(II) in natural and waste waters at approximately 2 cents per measurement. The device makes use of a polymer inclusion membrane (PIM) to provide the selectivity for Cu(II). The PIM consists of 40 wt% di(2-ethlyhexyl) phosphoric acid (D2EHPA) as the carrier, 10 wt% dioctyl phthalate (DOP) as a plasticizer, 49.5 wt% poly(vinyl chloride) (PVC) as the base polymer and 0.5 wt% (mm(-1)) 1-(2'-pyridylazo)-2-naphthol (PAN) as the colourimetric reagent. High selectivity under mildly acidic conditions (HCl, pH 2.0) is achieved for Cu(II) in the presence of frequently encountered metal ions in natural and waste waters such as Fe(III), Al(III), Zn(II), Cd(II), Pb(II), Ca(II), Mg(II), and Ni(II). The laminated PBS consists of a PIM sensing disc (2mm in diameter) attached to the centre of a circular hydrophilic zone (7 mm in diameter) pretreated with 0.01 M HCl. This hydrophilic zone separates the sample port (a circular hole in the plastic cover) from the PIM sensing disc. After introducing 19.2 μL of a sample/standard solution to the sample port, Cu(II) diffuses across the hydrophilic zone and is extracted into the PIM disc as the Cu(II)-D2EHPA complex which subsequently reacts with PAN to produce the red-purple coloured Cu(II)-PAN complex. The colour intensity of the PIM disc is measured 15 min after sample/standard introduction by scanning using a flatbed scanner. Under optimal conditions the device is characterized by a limit of detection (LOD) and limit of quantitation (LOQ) of 0.06 and 0.21 mg L(-1) Cu(II), respectively, with two linear ranges together covering the Cu(II) concentration range from 0.1 to 30.0 mg L(-1). The PBS was successfully applied to the determination of Cu(II) in hot tap water and mine tailings water.

  20. Mechanical Properties and Microstructural Characterization of Cu-4.3 Pct Sn Fabricated by Selective Laser Melting

    Science.gov (United States)

    Ventura, Anthony P.; Wade, C. Austin; Pawlikowski, Gregory; Bayes, Martin; Watanabe, Masashi; Misiolek, Wojciech Z.

    2017-01-01

    Components were fabricated via selective laser melting (SLM) of prealloyed Cu-4.3 pct Sn powder and heat treated at 873 K and 1173 K (600 °C and 900 °C) for 1 hour. Tensile testing, conductivity measurement, and detailed microstructural characterization were carried out on samples in the as-printed and heat-treated conditions. Optimization of build parameters resulted in samples with around 97 pct density with a yield strength of 274 MPa, an electrical conductivity of 24.1 pct IACS, and an elongation of 5.6 pct. Heat treatment resulted in lower yield strength with significant increases in ductility due to recrystallization and a decrease in dislocation density. Tensile sample geometry and surface finish also showed a significant effect on measured yield strength but a negligible change in measured ductility. Microstructural characterization indicated that grains primarily grow epitaxially with a submicron cellular solidification substructure. Nanometer scale tin dioxide particles identified via X-ray diffraction were found throughout the structure in the tin-rich intercellular regions.

  1. Amidofluorene-appended lower rim 1,3-diconjugate of calix[4]arene: synthesis, characterization and highly selective sensor for Cu2+

    Science.gov (United States)

    Nemati, Mohammad; Zadmard, Reza; Mohadjerani, Maryam

    2016-01-01

    Summary Functionalization of calix[4]arene with amidofluorene moieties at the lower rim led to formation of the 1,3-diconjugate of calix[4]arene L as a novel fluorescent chemosensor for Cu2+. The receptor molecule L exhibited a pronounced selectivity towards Cu2+ over other mono and divalent ions. The formation of the complex between L and Cu2+ was evaluated by absorption, fluorescence and 1H NMR spectroscopy. The sensor L showed a remarkable color change from colorless to purple and a fluorescence quenching only upon interaction with Cu2+. The 1:1 stoichiometry of the obtained complex has been determined by Job’s plot. The association constant determined by fluorescence titration was found to be 1.8 × 106 M−1. The sensor showed a linear response toward Cu2+ in the concentration range from 1 to 10 µM with a detection limit of 9.6 × 10−8 M. PMID:27559419

  2. Selective removals of heavy metals (Pb(2+), Cu(2+), and Cd(2+)) from wastewater by gelation with alginate for effective metal recovery.

    Science.gov (United States)

    Wang, Fei; Lu, Xingwen; Li, Xiao-yan

    2016-05-05

    A novel method that uses the aqueous sodium alginate solution for direct gelation with metal ions is developed for effective removal and recovery of heavy metals from industrial wastewater. The experimental study was conducted on Pb(2+), Cu(2+), and Cd(2+) as the model heavy metals. The results show that gels can be formed rapidly between the metals and alginate in less than 10 min and the gelation rates fit well with the pseudo second-order kinetic model. The optimum dosing ratio of alginate to the metal ions was found to be between 2:1 and 3:1 for removing Pb(2+) and around 4:1 for removing Cu(2+) and Cd(2+) from wastewater, and the metal removal efficiency by gelation increased as the solution pH increased. Alginate exhibited a higher gelation affinity toward Pb(2+) than Cu(2+) and Cd(2+), which allowed a selective removal of Pb(2+) from the wastewater in the presence of Cu(2+) and Cd(2+) ions. Chemical analysis of the gels suggests that the gelation mainly occurred between the metal ions and the -COO(-) and -OH groups on alginate. By simple calcination of the metal-laden gels at 700 °C for 1 h, the heavy metals can be well recovered as valuable resources. The metals obtained after the thermal treatment are in the form of PbO, CuO, and CdO nanopowders with crystal sizes of around 150, 50, and 100 nm, respectively.

  3. Evaluation of Cd, Cr, Cu, Ni, and Pb in selected cosmetic products from Jordanian, Sudanese, and Syrian markets.

    Science.gov (United States)

    Massadeh, A M; El-Khateeb, M Y; Ibrahim, S M

    2017-08-01

    There is no sufficient data that evaluate heavy metal content in cosmetic products in Jordan as well as Sudan and Syria. This study aims to assess metal levels which include Cadmium (Cd), Chromium (Cr), Copper (Cu), Nickel (Ni), and Lead (Pb) in cosmetic products. These elements have draft limits because they are identified as potential impurities and are known to be toxic. This study aims to provide information to the population that may be beneficial to public health. Samples were collected from different brands obtained from markets in Jordan, Sudan, and Syria. Some of the selected cosmetic products were eyeliner, eye pencil, mascara, lipstick, powder, face cream, body cream, sun block, Vaseline, and the traditional eye cosmetic (kohl). The heavy metal content in these samples were determined by atomic absorption spectrometry (AAS). Based on analysis of variance analysis, a significant difference in heavy metal levels was found for samples obtained from Jordanian and Sudanese markets. The acid digestion method used in this study was based on procedures recommended by Nnorom et al. with some modifications as follows. (i) A weight of 2.0 g of cosmetic sample was dissolved in a mixture of 6 mL of high quality concentrated 69% nitric acid (HNO3; Merck, Darmstadt, Germany) and 4 mL of concentrated 37% hydrochloric acid (Scharlau, Spain) in a porcelain crucible and heated on a hotplate to near dryness. (ii) An aliquot of 15 mL HNO3 (1.00 M) was added to the digested sample and filtered through a Whatman No. 40 filter paper. (iii) The digested sample was transferred quantitatively into a 25 mL volumetric flask and then diluted with deionized water. (iv) Each digested sample was evaporated at 70 °C to about 1 mL and transferred into a polyethylene flask and diluted with 25 mL deionized water. (v) Blank was treated in the same procedure. In Jordan the concentration ranges of heavy metals in the collected samples were: Cd (0.03-0.10 μg/g), Cr (0.0-1.00

  4. Selective leaching and surface properties of Ti{sub 50}Ni{sub 50−x}Cu{sub x} (x = 0–20 at.%) shape memory alloys for biomedical applications

    Energy Technology Data Exchange (ETDEWEB)

    Chang, Shih-Hang, E-mail: shchang@niu.edu.tw; Chiu, Wei-Chen

    2015-01-01

    Highlights: • TiNiCu alloys show higher leaching rates of Ni and Cu ions than those of TiNi alloys. • NiO and Cu{sub 2}O oxides caused a deterioration of the protection of passive TiO{sub 2} films. • Surface modifications are needed to avoid the toxicity risk caused by released ions. - Abstract: This study investigated the selective leaching and surface characteristics of Ti{sub 50}Ni{sub 50} and Ti{sub 50}Ni{sub 50−x}Cu{sub x} (x = 5, 10, and 20) shape memory alloys (SMAs) by employing inductively coupled plasma mass spectrometry, electrochemical tests, and X-ray photoelectron spectroscopy. The experimental results revealed that Ti{sub 50}Ni{sub 50−x}Cu{sub x} SMAs exhibited corrosion-resistance properties that were more favorable than those of Ti{sub 50}Ni{sub 50} SMAs, whereas the concentrations of the Ni and Cu ions selectively leached from Ti{sub 50}Ni{sub 50−x}Cu{sub x} SMAs were considerably higher than those of Ni and Cu ions selectively leached from Ti{sub 50}Ni{sub 50} SMAs. Ti{sub 50}Ni{sub 50−x}Cu{sub x} SMAs exhibited higher selective leaching rates of Ni and Cu ions than those of Ti{sub 50}Ni{sub 50} SMAs, because the NiO and Cu{sub 2}O oxides that formed on the surface caused a deterioration of the uniformity and protection of the passive TiO{sub 2} films. Although Ti{sub 50}Ni{sub 50−x}Cu{sub x} SMAs exhibited unique properties that are superior to those of TiNi binary SMAs in particular biomedical applications, appropriate surface modifications are necessary to avoid the risk of toxicity caused by the released Ni and Cu ions.

  5. Characterization and Potential Environmental Implications of Select Cu-Based Fungicides and Bactericides Employed in U.S. Markets

    Science.gov (United States)

    This exploratory study aimed to examine the extent and mineral speciation of nanosized Cu in two fungicide products (A and B) available in the U.S. markets. Electron microcopy results demonstrated the presence of spherical and polydisperse <100 nm Cu particles in product B. Oth...

  6. Characterization and Potential Environmental Implications of Select Cu-Based Fungicides and Bactericides Employed in U.S. Markets

    Science.gov (United States)

    This exploratory study aimed to examine the extent and mineral speciation of nanosized Cu in two fungicide products (A and B) available in the U.S. markets. Electron microcopy results demonstrated the presence of spherical and polydisperse <100 nm Cu particles in product B. Oth...

  7. A novel pyrazole biscoumarin based chemosensors for the selective detection of Cu(2+) and Zn(2+) ions.

    Science.gov (United States)

    Kandasamy, Karthikeyan; Ganesabaskaran, Sivaprasad; Pachamuthu, Muthusamy Poomalai; Ramanathan, Anand

    2015-09-05

    A novel chemosensor based on pyrazole biscoumarin molecule "4-hydroxy-3-((4-hydroxy-2-oxo-2H-chromen-3-yl)(1,3-diphenyl-1H-pyrazol-4-yl)methyl)-2H-chromen-2-one" (PBC) was synthesized by a simple method. The chemosensing properties of PBC towards transition metal ions like Cu(2+) and Zn(2+) by naked eye, UV-Visible and fluorescence spectroscopic methods were described. The PBC solution with Cu(2+) and Zn(2+) ion showed brown and blue colour respectively. The UV-Visible spectra of PBC with Cu(2+) and Zn(2+) ions exposed their corresponding absorption maxima. Further, the Job's plot method confirmed the 1:1 and 2:1 stoichiometry of the complex formation between the PBC with Cu(2+) and Zn(2+) ions respectively. The fluorescence enhancement of PBC on binding with Cu(2+) and Zn(2+) is due to the inhibition of photo induced electron transfer mechanism.

  8. A novel pyrazole biscoumarin based chemosensors for the selective detection of Cu2+ and Zn2+ ions

    Science.gov (United States)

    Kandasamy, Karthikeyan; Ganesabaskaran, Sivaprasad; Pachamuthu, Muthusamy Poomalai; Ramanathan, Anand

    2015-09-01

    A novel chemosensor based on pyrazole biscoumarin molecule "4-hydroxy-3-((4-hydroxy-2-oxo-2H-chromen-3-yl)(1,3-diphenyl-1H-pyrazol-4-yl)methyl)-2H-chromen-2-one" (PBC) was synthesized by a simple method. The chemosensing properties of PBC towards transition metal ions like Cu2+ and Zn2+ by naked eye, UV-Visible and fluorescence spectroscopic methods were described. The PBC solution with Cu2+ and Zn2+ ion showed brown and blue colour respectively. The UV-Visible spectra of PBC with Cu2+ and Zn2+ ions exposed their corresponding absorption maxima. Further, the Job's plot method confirmed the 1:1 and 2:1 stoichiometry of the complex formation between the PBC with Cu2+ and Zn2+ ions respectively. The fluorescence enhancement of PBC on binding with Cu2+ and Zn2+ is due to the inhibition of photo induced electron transfer mechanism.

  9. Cu(2+) modulated silver nanoclusters as an on-off-on fluorescence probe for the selective detection of L-histidine.

    Science.gov (United States)

    Zheng, Xuyue; Yao, Tianming; Zhu, Ying; Shi, Shuo

    2015-04-15

    In the present study, a new strategy based on Cu(2+) mediated DNA-templated silver nanoclusters (DNA-Ag NCs) was developed, as a label-free, on-off-on fluorescent probe for the detection of l-histidine. Eight synthesized DNA oligonucleotides (D1-D8) were experimentally tested, and D5-Ag NCs was finally selected for l-histidine detection due to its best fluorescent properties. The fluorescence emission of D5-Ag NCs could be quenched by Cu(2+) via electron or energy transfer. Upon addition of l-histidine, the chelation between Cu(2+) and the imidazole group of l-histidine leads to Cu(2+) liberation from D5-Ag NCs, and subsequently results in a dramatic fluorescence enhancement of the probe. The method displayed a good selectivity toward l-histidine over all the other amino acids, with a linear relationship in the range of 0.20-80μM, and a limit of detection (LOD) of 4.3nM. The strategy was also successfully applied to detect l-histidine in diluted human urine, exhibiting great opportunities for practical application in biological system.

  10. Selective determination of gold(III) ion using CuO microsheets as a solid phase adsorbent prior by ICP-OES measurement.

    Science.gov (United States)

    Rahman, Mohammed M; Khan, Sher Bahadar; Marwani, Hadi M; Asiri, Abdullah M; Alamry, Khalid A; Al-Youbi, Abdulrahman O

    2013-01-30

    We have prepared calcined CuO microsheets (MSs) by a wet-chemical process using reducing agents in alkaline medium and characterized by UV/vis., fourier transform infrared (FT-IR) spectroscopy, powder X-ray diffraction (XRD), and field-emission scanning electron microscopy (FESEM) etc. The detailed structural, compositional, and optical characterizations of the MSs were evaluated by XRD pattern, FT-IR, X-ray photoelectron spectroscopy (XPS), and UV-vis spectroscopy, respectively which confirmed that the obtained MSs are well-crystalline CuO and possessed good optical properties. The CuO MSs morphology was investigated by FESEM, which confirmed that the calcined nanomaterials were sheet-shaped and grown in large-quantity. Here, the efficiency of the CuO MS was applied for a selective adsorption of gold(III) ion prior to its detection by inductively coupled plasma-optical emission spectrometry (ICP-OES). The selectivity of CuO MSs towards various metal ions, including Au(III), Cd(II), Co(II), Cr(III), Fe(III), Pd(II), and Zn(II) was analyzed. Based on the adsorption isotherm study, it was confirmed that the selectivity of MSs phase was mostly towards Au(III) ion. The static adsorption capacity for Au(III) was calculated to be 57.0 mg g(-1). From Langmuir adsorption isotherm, it was confirmed that the adsorption process was mainly monolayer-adsorption onto a surface containing a finite number of adsorption sites.

  11. Posttraumatic stress disorder and exposure to trauma reminders after a terrorist attack.

    Science.gov (United States)

    Glad, Kristin A; Jensen, Tine K; Hafstad, Gertrud S; Dyb, Grete

    2016-01-01

    The aims of this study were twofold: (a) to systematically describe the type and frequency of trauma reminders reported after a terrorist attack and (b) to examine whether posttraumatic stress disorder (PTSD) is associated with frequency of exposure to trauma reminders. A total of 285 survivors (M age = 22.2, SD = 4.3, 53% males) of the 2011 massacre on Utøya Island, Norway, were interviewed face to face 14-15 months after the terror. Participants were asked how often they had experienced a range of different trauma reminders in the past month and which was most distressing. Current posttraumatic stress reactions were measured using the University of California at Los Angeles PTSD Reaction Index. In all, 33.3% of the survivors reported having experienced 1 or more trauma reminders often/very often in the past month. Auditory reminders were most frequently encountered and were reported to be the most distressing, especially sudden and sharp noises. Meeting the diagnostic criteria for PTSD was significantly associated with frequency of exposure to trauma reminders. The findings suggest that trauma reminders are common among survivors of a terrorist attack almost 1.5 years after the trauma and that PTSD is strongly related to the frequency of exposure to reminders. It is important that clinicians are aware of the significant role trauma reminders may play in maintaining PTSD and help trauma survivors recognize and manage reminders.

  12. re:Mind - A mobile application for bipolar disorder patients

    DEFF Research Database (Denmark)

    Corradini, Andrea; Lyck Festersen, Pia

    2014-01-01

    Several personal healthcare monitoring systems have been proposed to target somatic diseases and specific mental illness. This paper reports on the re:Mind system, which is a helpful tool that supports the treatment of people diagnosed with bipolar disorder. We developed the system as a hybrid...... mobile application to help bipolar patients self-monitor a set of parameters that are known to affect their illness while also allowing them to communicate with their physician. Based on data collected from medical personnel, clinicians, patients, patients’ relatives and persons akin to them, we created...

  13. Incentive and Reminder Strategies to Improve Response Rate for Internet-Based Physician Surveys: A Randomized Experiment

    Science.gov (United States)

    Wittich, Christopher M; Daniels, Wendlyn L; West, Colin P; Harris, Ann M; Beebe, Timothy J

    2016-01-01

    Background Most research on how to enhance response rates in physician surveys has been done using paper surveys. Uncertainties remain regarding how to enhance response rates in Internet-based surveys. Objective To evaluate the impact of a low-cost nonmonetary incentive and paper mail reminders (formal letter and postcard) on response rates in Internet-based physician surveys. Methods We executed a factorial-design randomized experiment while conducting a nationally representative Internet-based physician survey. We invited 3966 physicians (randomly selected from a commercial database of all licensed US physicians) via email to complete an Internet-based survey. We used 2 randomly assigned email messages: one message offered a book upon survey completion, whereas the other did not mention the book but was otherwise identical. All nonrespondents received several email reminders. Some physicians were further assigned at random to receive 1 reminder via paper mail (either a postcard or a letter) or no paper reminder. The primary outcome of this study was the survey response rate. Results Of the 3966 physicians who were invited, 451 (11.4%) responded to at least one survey question and 336 (8.5%) completed the entire survey. Of those who were offered a book, 345/2973 (11.6%) responded compared with 106/993 (10.7%) who were not offered a book (odds ratio 1.10, 95% CI 0.87-1.38, P=.42). Regarding the paper mail reminder, 168/1572 (10.7%) letter recipients, 148/1561 (9.5%) postcard recipients, and 69/767 (9.0%) email-only recipients responded (P=.35). The response rate for those receiving letters or postcards was similar (odds ratio 1.14, 95% CI 0.91-1.44, P=.26). Conclusions Offering a modest nonmonetary incentive and sending a paper reminder did not improve survey response rate. Further research on how to enhance response rates in Internet-based physician surveys is needed. PMID:27637296

  14. Biomarker validation of a cued recall memory deficit in prodromal Alzheimer disease.

    Science.gov (United States)

    Wagner, M; Wolf, S; Reischies, F M; Daerr, M; Wolfsgruber, S; Jessen, F; Popp, J; Maier, W; Hüll, M; Frölich, L; Hampel, H; Perneczky, R; Peters, O; Jahn, H; Luckhaus, C; Gertz, H-J; Schröder, J; Pantel, J; Lewczuk, P; Kornhuber, J; Wiltfang, J

    2012-02-07

    To compare cued recall measures with other memory and nonmemory tests regarding their association with a biomarker profile indicative of Alzheimer disease (AD) in CSF among patients with mild cognitive impairment (MCI). Data were obtained by the German Dementia Competence Network. A total of 185 memory clinic patients fulfilling broad criteria for MCI (1 SD deficit in memory tests or in nonmemory tests) were assessed with an extended neuropsychological battery, which included the Free and Cued Selective Reminding Test (FCSRT), the word list learning task from the Consortium to Establish a Registry for Alzheimer's Disease neuropsychological battery (CERAD-NP), and the Logical Memory (LM) paragraph recall test from the Wechsler Memory Scale-Revised. CSF was obtained from all patients. A total of 74 out of 185 subjects with MCI (40%) had a CSF profile consistent with AD (Aβ(1-42)/tau ratio; CSF AD+ group). FCSRT measures reflecting both free and cued recall discriminated best between CSF AD+ and CSF AD- patients, and significantly improved CSF AD classification accuracy, as compared with CERAD delayed recall and LM delayed recall. Cued recall deficits are most closely associated with CSF biomarkers indicative of AD in subjects with MCI. This novel finding complements results from prospective clinical studies and provides further empirical support for cued recall as a specific indicator of prodromal AD, in line with recently proposed research criteria.

  15. Automated telecommunication-based reminders and adherence with once-daily glaucoma medication dosing: the automated dosing reminder study.

    Science.gov (United States)

    Boland, Michael V; Chang, Dolly S; Frazier, Travis; Plyler, Ryan; Jefferys, Joan L; Friedman, David S

    2014-07-01

    Topical glaucoma medications lower intraocular pressure and alter the course of the disease. Because adherence with glaucoma medications is a known problem, interventions are needed to help those patients who do not take their medications as prescribed. To assess the ability of an automated telecommunication-based intervention to improve adherence with glaucoma medications. We performed a prospective cohort study of medication adherence, followed by a randomized intervention for those found to be nonadherent, of individuals recruited from a university-based glaucoma subspecialty clinic. A total of 491 participants were enrolled in the initial assessment of adherence. Of those, 70 were nonadherent with their medications after 3 months of electronic monitoring and randomized to intervention and control groups. A personal health record was used to store the list of patient medications and reminder preferences. On the basis of those data, participants randomized to the intervention received daily messages, either text or voice, reminding them to take their medication. Participants randomized to the control group received usual care. Difference in adherence before and after initiation of the intervention. Using an intent-to-treat analysis, we found that the median adherence rate in the 38 participants randomized to the intervention increased from 53% to 64% (P telecommunication-based reminders linked to data in a personal health record improved adherence with once-daily glaucoma medications. This is an effective method to improve adherence that could realistically be implemented in ophthalmology practices with a minimum amount of effort on the part of the practice or the patient.

  16. A highly selective fluorescent sensor for Cu{sup 2+} based on 2-(2'-hydroxyphenyl)benzoxazole in a poly(vinyl chloride) matrix

    Energy Technology Data Exchange (ETDEWEB)

    Zhang Xiaobing [State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 (China); Peng Jing [State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 (China); He Chunlian [Medical college, Hunan Normal University, Changsha 410006 (China); Shen Guoli [State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 (China); Yu Ruqin [State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 (China)]. E-mail: rqyu@hnu.cn

    2006-05-17

    This paper describes a copper selective optical chemical sensor based on static quenching of the fluorescence of 2-(2'-hydroxyphenyl)benzoxazole entrapped in a poly(vinyl chloride) (PVC) membrane. The effect of the composition of the sensing membrane was studied, and experimental conditions were optimized. The sensors exhibit stable response over the concentration range from 4.0 x 10{sup -8} M to 5.0 x 10{sup -5} M Cu{sup 2+} at pH 4.0-6.5, and a high selectivity. The response time for Cu{sup 2+} with concentration {<=}5 x 10{sup -6} M is less than 7 min. The optode can be regenerated using 0.1 M HCl and acetate buffer solution. The sensor has been used for direct measurement of copper content in river water samples with a relative error less than 4% with reference to that obtained by atomic absorption spectrometry.

  17. Predicting adolescent posttraumatic stress in the aftermath of war: differential effects of coping strategies across trauma reminder, loss reminder, and family conflict domains.

    Science.gov (United States)

    Howell, Kathryn H; Kaplow, Julie B; Layne, Christopher M; Benson, Molly A; Compas, Bruce E; Katalinski, Ranka; Pasalic, Hafiza; Bosankic, Nina; Pynoos, Robert

    2015-01-01

    The vast majority of youth who lived through the Bosnian war were exposed to multiple traumatic events, including interpersonal violence, community destruction, and the loss of a loved one. This study examined factors that predict post-war psychological adjustment, specifically posttraumatic stress, in Bosnian adolescents. Regression analyses evaluated theorized differential relations between three types of post-war stressors - exposure to trauma reminders, loss reminders, and intrafamilial conflict - specific coping strategies, and posttraumatic stress symptom dimensions. We examined 555 Bosnian adolescents, aged 15-19 years, to predict their long-term posttraumatic stress reactions in the aftermath of war. Findings indicated that post-war exposure to trauma reminders, loss reminders, and family conflict, as well as engagement and disengagement coping strategies, predicted posttraumatic stress symptoms. Secondary control engagement coping responses to all three types of post-war stressors were inversely associated with posttraumatic stress symptoms, whereas primary control engagement coping responses to family conflict were inversely associated with hyperarousal symptoms. Disengagement responses to trauma reminders and family conflict were positively associated with re-experiencing symptoms. These findings shed light on ways in which trauma reminders, loss reminders, and family conflict may intersect with coping responses to influence adolescent postwar adjustment.

  18. Selective Iron(III ion uptake using CuO-TiO2 nanostructure by inductively coupled plasma-optical emission spectrometry

    Directory of Open Access Journals (Sweden)

    Rahman Mohammed M

    2012-12-01

    Full Text Available Abstract Background CuO-TiO2 nanosheets (NSs, a kind of nanomaterials is one of the most attracting class of transition doped semiconductor materials due to its interesting and important optical, electrical, and structural properties and has many technical applications, such as in metal ions detection, photocatalysis, Chemi-sensors, bio-sensors, solar cells and so on. In this paper the synthesis of CuO-TiO2 nanosheets by the wet-chemically technique is reported. Methods CuO-TiO2 NSs were prepared by a wet-chemical process using reducing agents in alkaline medium and characterized by UV/vis., FT-IR spectroscopy, X-ray photoelectron spectroscopy (XPS, powder X-ray diffraction (XRD, and field-emission scanning electron microscopy (FE-SEM etc. Results The structural and optical evaluation of synthesized NSs were measured by XRD pattern, Fourier transform infrared (FT-IR and UV–vis spectroscopy, respectively which confirmed that the obtained NSs are well-crystalline CuO-TiO2 and possessing good optical properties. The morphological analysis of CuO-TiO2 NSs was executed by FE-SEM, which confirmed that the doped products were sheet-shaped and growth in large quantity. Here, the analytical efficiency of the NSs was applied for a selective adsorption of iron(III ion prior to detection by inductively coupled plasma-optical emission spectrometry (ICP-OES. The selectivity of NSs towards various metal ions, including Au(III, Cd(II, Co(II, Cr(III, Fe(III, Pd(II, and Zn(II was analyzed. Conclusions Based on the selectivity study, it was confirmed that the selectivity of doped NSs phase was the most towards Fe(III ion. The static adsorption capacity for Fe(III was calculated to be 110.06 mgg−1. Results from adsorption isotherm also verified that the adsorption process was mainly monolayer-adsorption onto a surface containing a finite number of CuO-TiO2 NSs adsorption sites.

  19. A Bifunctional Thioether Linked Coumarin Appended Calix[4]arene Acquires Selectivity Toward Cu(2+) Sensing on Going from Solution to SAM on Gold.

    Science.gov (United States)

    Samanta, Kushal; Rao, Chebrolu Pulla

    2016-02-10

    A bifunctional calix[4]arene molecule bearing coumarin moiety on the lower rim and thioether moiety on the upper rim (L1), has been synthesized and well characterized by (1)H, (13)C NMR and mass spectrometry. Suitably functionalized coumarin moieties are well suited for selective recognition of various cations and anions. Among the 10 different metal ions studied, only Cu(2+) and Fe(3+) exhibit appreciable changes in the absorption spectra owing to the availability of functional moieties present at both the lower as well as the upper rim of free L1 in acetonitrile solution. To bring better selectivity, we blocked one of these functional moieties by coating on to a surface so that only the other one is exposed to the environment for sensing. Such a study carried out in the present case using the self-assembled monolayer (SAM) of L1 on Au(111) resulted in selective sensing of Cu(2+) over several other metal ions as studied by surface plasmon resonance (SPR). The SAM of L1 on Au(111) was confirmed by different techniques, such as grazing incidence FT-IR, contact angle measurement, cyclic voltammetry and scanning tunneling microscopy. Thus, L1 is proven to be a suitable sensor for Cu(2+) when attached to gold surface.

  20. One-pot hydrothermal synthesis of CuBi co-doped mesoporous zeolite Beta for the removal of NOx by selective catalytic reduction with ammonia

    Science.gov (United States)

    Xie, Zhiguo; Zhou, Xiaoxia; Wu, Huixia; Chen, Lisong; Zhao, Han; Liu, Yan; Pan, Linyu; Chen, Hangrong

    2016-07-01

    A series of CuBi co-doped mesoporous zeolite Beta (CuxBiy-mBeta) were prepared by a facile one-pot hydrothermal treatment approach and were characterized by XRD, N2 adsorption-desorption, TEM/SEM, XPS, H2-TPR, NH3-TPD and in situ DRIFTS. The catalysts CuxBiy-mBeta were applied to the removal of NOx by selective catalytic reduction with ammonia (NH3-SCR), especially the optimized Cu1Bi1-mBeta achieved the high efficiency for the removal of NOx and N2 selectivity, superior water and sulfur resistance as well as good durability. The excellent catalytic performance could be attributed to the acid sites of the support and the synergistic effect between copper and bismuth species. Moreover, in situ DRIFTS results showed that amides NH2 and NH4+ generated from NH3 adsorption could be responsible for the high selective catalytic reduction of NOx to N2. In addition, a possible catalytic reaction mechanism on Cu1Bi1-mBeta for the removal of NOx by NH3-SCR was proposed for explaining this catalytic process.

  1. Modification of Cu/ZSM-5 catalyst with CeO2for selective catalytic reduction of NOxwith ammonia

    Institute of Scientific and Technical Information of China (English)

    刘雪松; 吴晓东; 翁端; 石磊

    2016-01-01

    Cu/ZSM-5 and CeO2-modified Cu/ZSM-5 catalysts were prepared by a wetness impregnation method. The addition of CeO2was found to enhance the NOxselective catalytic reduction (SCR) activity of the catalyst atlow temperatures, but the high-temperature activitywas weakened. The catalysts were characterized by X-ray diffraction (XRD), nitrogen physisorption, induc-tively coupled plasma optical emission spectrometry (ICP-OES), X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR), H2temperature-programmed reduction (TPR) and NH3temperature-programmed desorption (TPD). The results showedthat more CuO clusters instead of isolated Cu2+specieswere obtained on the modified catalyst. These active CuO clusters, as well as the Cu-Ce synergistic effect, improvedthe redox property of the catalyst and low-temperatures SCR activity via promoting the oxidation of NO to NO2and fast SCR reaction. The loss in high-temperatures activitywas attributedto the enhanced competitive ox-idation of NH3by O2and decreased surface acidity of the catalyst.

  2. The effects of death reminders on sex differences in prejudice toward gay men and lesbians.

    Science.gov (United States)

    Webster, Russell J; Saucier, Donald A

    2011-01-01

    Terror management research shows that death reminders (mortality salience) increase prejudice toward worldview violators. Two studies investigated whether death reminders exacerbated differences in heterosexual men's and women's reports of sexual prejudice (negative attitudes based on sexual orientation). Results showed that following death reminders, sex differences in anti-gay discrimination and affective prejudice toward gay men (but not toward lesbians) were larger, and that these increased sex differences were mediated by gender role beliefs. The current studies suggest that researchers may attenuate the effects of death reminders by lessening the perceived worldview violation in addition to alleviating the existential terror of death.

  3. Colorimetric Strategy for Highly Sensitive and Selective Simultaneous Detection of Histidine and Cysteine Based on G-Quadruplex-Cu(II) Metalloenzyme.

    Science.gov (United States)

    Wu, Changtong; Fan, Daoqing; Zhou, Chunyang; Liu, Yaqing; Wang, Erkang

    2016-03-01

    In this present work, we proposed a colorimetric strategy for simultaneous detection of histidine and cysteine based on G-quadruplex-Cu(II) metalloenzyme for the first time. Because of the adding of histidine or cysteine, the formation of G-quadruplex-Cu(II) metalloenzyme will be disturbed, thus the catalytic activity to TMB-H2O2 reaction is inversely proportional to the concentration of histidine or cysteine. With this strategy, the limit of detection in experimental measurement for histidine and cysteine is 10 nM and 5 nM, respectively, which are both lower than previous colorimetric arrays. With the help of NEM, cysteine is alkylated and the reaction between Cu(2+) is inhibited, so the selectivity can also be guaranteed. The cost is quite low since the developed array is label free and enzyme free by using low-cost DNA and Cu(2+). More importantly, the colorimetric detection operation is very simple without any further modification process.

  4. Sensitive, Selective, and Fast Detection of ppb-Level H2S Gas Boosted by ZnO-CuO Mesocrystal

    Science.gov (United States)

    Guo, Yanan; Gong, Miaomiao; Li, Yushu; Liu, Yunling; Dou, Xincun

    2016-10-01

    ZnO-CuO mesocrystal was prepared via topotactic transformation using one-step direct annealing of aqueous precursor solution and assembled into a H2S sensor. The ZnO-CuO mesocrystal-based sensor possesses good linearity and high sensitivity in the low-concentration range (10-200 ppb). Compared to pure CuO, the as-prepared ZnO-CuO mesocrystal sensor exhibited superior H2S sensing performance with a response ranging from 8.6 to 152 % towards H2S concentrations from 10 ppb to 10 ppm when applied at the optimized working temperature of 125 °C. The sensor showed excellent repeatability and good selectivity towards H2S gas even at a concentration four orders of magnitude lower than the interfering gases, such as H2, CO2, CO, NO2, acetone, and NH3. The improved sensitivity could be attributed partially to the effective diffusion of analyte gas through the mesocrystal surface and the abundant accessible active sites. Moreover, the nanoscale p-n junctions within the mesocrystal, which could effectively manipulate the local charge carrier concentration, are also beneficial to boost the sensing performance.

  5. Carbohydrate-based switch-on molecular sensor for Cu(II) in buffer: absorption and fluorescence study of the selective recognition of Cu(II) ions by galactosyl derivatives in HEPES buffer.

    Science.gov (United States)

    Singhal, Nitin Kumar; Ramanujam, Balaji; Mariappanadar, Vairamani; Rao, Chebrolu Pulla

    2006-08-03

    [graph: see text] 1-(Beta-D-galactopyranosyl-1'-deoxy-1'-iminomethyl)-2-hydroxynaphthalene (L1), possessing an ONO binding core, was found to be selective for Cu2+ ions in N-[2-hydroxyethyl]piperazine-N'-[2-ethanesulfonic acid] buffer, at concentrations < or = 580 ppb, at physiological pH by eliciting switch-on behavior, whereas the other ions, viz., Mg2+, Ca2+, Mn2+, Fe2+, Co2+, Ni2+, Zn2+, and Cd2+, caused no significant change in the fluorescence. Whereas the binding characteristics were ascertained by absorption spectroscopy, the species formed were shown by Q-TOF ES MS.

  6. Mn-Cu-Ce-Fe/REY系列催化剂上NH3选择性催化还原NO性能%Selective catalytic reduction of NO with NH3 over Mn-Cu-Ce-Fe/REY catalysts

    Institute of Scientific and Technical Information of China (English)

    任翠涛; 李滨; 王虹; 李翠清; 丁福臣; 宋永吉

    2012-01-01

    Mn-Cu-Fe-Ce/REY catalysts were designed with orthogonal experimental method and prepared by impregnation method. The catalytic performance of the catalysts for selective reduction of NO with NH3 was evaluated in the presence of S02 and in a fixed bed micro-reactor. The effects of Mn, Cu, Fe and Ce components on the catalytic activity were investigated. The catalysts were characterized by XRD, SEM and H2 -TPR. The results showed that the sequence of the influence of active components on catalyst activity from big to small was as follows; Cu > Fe > Ce > Mn, and the activity of the catalysts was affected by their redox properties.%采用正交实验设计和浸渍法制备Mn-Cu-Fe-Ce/REY催化剂.采用固定床微型反应器评价SO2存在下催化剂在NH3选择性催化还原NO反应中的活性,考察Mn、Cu、Fe和Ce各活性组分对催化剂活性的影响,并采用XRD、H2-TPR和SEM等手段对催化剂进行表征.结果表明,Mn、Cu、Fe和Ce各活性组分对催化剂活性影响顺序为:Cu> Fe> Ce> Mn,催化剂的氧化还原性能影响催化剂活性.

  7. Selective Filter Effect Induced by Cu(2+) Adsorption on the Fluorescence of a GdVO4:Eu Nanoprobe.

    Science.gov (United States)

    Kim, Hyunsub; Jeong, Heejin; Byeon, Song-Ho

    2016-06-22

    Human blood contains substantial amounts of metal ions such as Mg(2+), Ca(2+), Fe(2+), Cu(2+), Zn(2+), Cd(2+), Pb(2+), and Al(3+). Most biomedical applications of nanoparticles require understanding the influence of these metal ions because adsorbed metal ions can affect the function of nanoparticles to limit their sensitivity, performance, stability, and/or resolution in applications. In the present work, the adsorption of various metal ions at the surface of GdVO4:Eu nanoparticles was studied to assess their spectral filter effect on the fluorescence of GdVO4:Eu. Due to the negative surface potential, the electrostatic attraction caused an intensive adsorption reaction of GdVO4:Eu nanoparticles with metal cations. Compared to the adsorption of other common metal ions in human blood, the distinct fluorescence quenching of GdVO4:Eu was induced in the presence of Cu(2+) ions. On the basis of the UV-vis absorption spectrum of an aqueous CuCl2 solution and reflectance spectrum of Cu(OH)2, in which the surroundings of Cu(2+) ions are supposedly similar to the hydroxylated surface of GdVO4:Eu nanoparticles, it is proposed that the complementary overlap of the emission band of GdVO4:Eu with the absorption band of Cu(2+) results in the effective filter effect to quench the red emission. Because GdVO4:Eu nanoparticles are attractive candidates for applications as magnetic/fluorescent multimodal nanoprobes, it is important to recognize that the average amount of Cu(2+) ion in human blood is sufficient to interfere with or limit the fluorescence probe function of GdVO4:Eu nanoparticles.

  8. Competitive sorption and selective sequence of Cu(II) and Ni(II) on montmorillonite: Batch, modeling, EPR and XAS studies

    Science.gov (United States)

    Yang, Shitong; Ren, Xuemei; Zhao, Guixia; Shi, Weiqun; Montavon, Gilles; Grambow, Bernd; Wang, Xiangke

    2015-10-01

    Heavy metal ions that leach from various industrial and agricultural processes are simultaneously present in the contaminated soil and water systems. The competitive sorption of these toxic metal ions on the natural soil components and sediments significantly influences their migration, bioavailability and ecotoxicity in the geochemical environment. In this study, the competitive sorption and selectivity order of Cu(II) and Ni(II) on montmorillonite are investigated by combining the batch experiments, X-ray diffraction (XRD), electron paramagnetic resonance (EPR), surface complexation modeling and X-ray Absorption Spectroscopy (XAS). The batch experimental data show that the coexisting Ni(II) exhibits a negligible influence on the sorption behavior of Cu(II), whereas the coexisting Cu(II) reduces the Ni(II) sorption percentage and changes the shape of the Ni(II) sorption isotherm. The sorption species of Cu(II) and Ni(II) on montmorillonite over the acidic and near-neutral pH range are well simulated by the surface complexation modeling. However, this model cannot identify the occurrence of surface nucleation and the co-precipitation processes at a highly alkaline pH. Based on the results of the EPR and XAS analyses, the microstructures of Cu(II) on montmorillonite are identified as the hydrated free Cu(II) ions at pH 5.0, inner-sphere surface complexes at pH 6.0 and the surface dimers/Cu(OH)2(s) precipitate at pH 8.0 in the single-solute and the binary-solute systems. For the Ni(II) sorption in the single-solute system, the formed microstructure varies from the hydrated free Ni(II) ions at the pH values of 5.0 and 6.0 to the inner-sphere surface complexes at pH 8.0. For the Ni(II) sorption in the binary-solute system, the coexisting Cu(II) induces the formation of the inner-sphere complexes at pH 6.0. In contrast, Ni(II) is adsorbed on montmorillonite via the formation of Ni phyllosilicate co-precipitate/α-Ni(OH)2(s) precipitate at pH 8.0. The selective sequence

  9. Indigo Carmine-Cu complex probe exhibiting dual colorimetric/fluorimetric sensing for selective determination of mono hydrogen phosphate ion and its logic behavior

    Science.gov (United States)

    Tavallali, Hossein; Deilamy-Rad, Gohar; Moaddeli, Ali; Asghari, Khadijeh

    2017-08-01

    A new selective probe based on copper complex of Indigo Carmine (IC-Cu2) for colorimetric, naked-eye, and fluorimetric recognition of mono hydrogen phosphate (MHP) ion in H2O/DMSO (4:1 v/v, 1.0 mmol L- 1 HEPES buffer solution pH 7.5) was developed. Detection limit of HPO42 - determination, achieved by fluorimetric and 3lorimetric method, are 0.071 and 1.46 μmol L- 1, respectively. Potential, therefore is clearly available in IC-Cu2 complex to detect HPO42 - in micromolar range via dual visible color change and fluorescence response. Present method shows high selectivity toward HPO42 - over other phosphate species and other anions and was successfully utilized for analysis of P2O5 content of a fertilizer sample. The results obtained by proposed chemosensor presented good agreement with those obtained the colorimetric reference method. INHIBIT and IMPLICATION logic gates operating at molecular level have been achieved using Cu2 + and HPO42 - as chemical inputs and UV-Vis absorbance signal as output.

  10. Diatomite-supported Pd-M (M=Cu, Co, Ni) bimetal nanocatalysts for selective hydrogenation of long-chain aliphatic esters.

    Science.gov (United States)

    Huang, Changliang; Zhang, Hongye; Zhao, Yanfei; Chen, Sha; Liu, Zhimin

    2012-11-15

    Diatomite supported Pd-M (M=Cu, Co, Ni) bimetal nanocatalysts with various metal compositions were prepared and characterized by means of X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. It was demonstrated that the metal nanoparticles were uniformly distributed on the support, and their size was centered around 8 nm with a relatively narrow size distribution. The catalysts were used to catalyze hydrogenation of long-chain aliphatic esters, including methyl palmitate, methyl stearate, and methyl laurate. It was indicated that the all diatomite-supported Pd-based bimetal catalysts were active to the selective hydrogenation of long-chain esters to corresponding alcohols at 270°C, originated from the synergistic effect between the metal particles and the diatomite support. For the selective hydrogenation of methyl palmitate, Pd-Cu/diatomite with metal loading of 1% and Pd/Cu=3 displayed the highest performance, giving a 1-hexadecanol yield of 82.9% at the substrate conversion of 98.8%. Copyright © 2012 Elsevier Inc. All rights reserved.

  11. High selectivity of a CuO modified hollow SnO2 nanofiber gas sensor to H2S at low temperature

    Science.gov (United States)

    Yang, Jiejie; Gao, Chaojun; Yang, Hui; Wang, Xinchang; Jia, Jianfeng

    2017-08-01

    CuO modified hollow SnO2 nanofibers with large specific surface area were successfully synthesized via a simple two-step process, using the electrospinning method and hydrothermal technique. Gas-sensing experiments on hierarchically CuO modified SnO2 hollow nanofibers displayed higher sensitivity and selectivity to H2S gas at lower operating temperatures compared with unmodified hollow SnO2 nanofibers. At the optimal operating temperature of 125 °C, the highest response value to 10 ppm H2S gas reached 410. Response time decreased when the concentration of H2S increased. It is almost no response to other gases when the operating temperature falls below 200 °C. The specific interaction between H2S gas and the CuO nanoparticles, as well as the amplifier effect on the gas response by the p-n junctions, strongly enhances the selectivity to H2S gas at a lower operating temperature.

  12. Effect of multiple patient reminders in improving diabetic retinopathy screening. A randomized trial.

    Science.gov (United States)

    Halbert, R J; Leung, K M; Nichol, J M; Legorreta, A P

    1999-05-01

    To determine whether multiple mailed patient reminders can produce an increase in the rate of diabetic retinal examinations (DRE) over that seen with a single reminder. All diabetic members > or = 18 years who were enrolled in a large network-based health maintenance organization (HMO) in California from August 1996 to July 1997 were identified using claims and pharmacy databases. Members who had no record of DRE in the HMO's claims database were then randomized into two groups. Both groups received mailed educational materials and a reminder to obtain the examination. Their physician groups also received a letter explaining the program, current guidelines for DRE, and a list of their diabetes patients with their DRE status. The single intervention group received no additional reminders. The multiple intervention group received additional reminders at 3, 6, and 9 months after baseline if they continued with no record of service, as determined from the claims database. The study cohort comprised 19,523 diabetic members, which were randomized into single (n = 9,614) and multiple (n = 9,909) intervention groups. There was an increase in monthly DRE rates after the intervention in August 1996 for both intervention groups. After the second reminder was sent to the multiple intervention group, the percentage of diabetic members receiving DRE was higher than the single intervention group. Rates before and after the third intervention were not significantly different, nor were monthly differences found. There was a significant difference in overall annual DRE rates between the groups (P = 0.023). Multiple patient reminders are more effective than single reminders in improving DRE rates in a managed care setting. However, the improvement noted was clinically small and appeared only after the second reminder; no incremental improvement was seen with additional reminders. Resources used for multiple reminders aimed at diabetic retinopathy might better be spent on other

  13. Effectiveness of mobile-phone short message service (SMS reminders for ophthalmology outpatient appointments: Observational study

    Directory of Open Access Journals (Sweden)

    Car Josip

    2008-05-01

    Full Text Available Abstract Background Non-attendance for hospital outpatient appointments is a significant problem in many countries. It causes suboptimal use of clinical and administrative staff and financial losses, as well as longer waiting times. The use of Short Message Service (SMS appointment reminders potentially offers a cost-effective and time-efficient strategy to decrease non-attendance and so improve the efficiency of outpatient healthcare delivery. Methods An SMS text message was sent to patients with scheduled appointments between April and September 2006 in a hospital ophthalmology department in London, reminding them of their appointments. This group acted as the intervention group. Controls were patients with scheduled ophthalmology appointments who did not receive an SMS or any alternative reminder. Results During the period of the study, 11.2% (50/447 of patients who received an SMS appointment reminder were non-attenders, compared to 18.1% (1720/9512 who did not receive an SMS reminder. Non-attendance rates were 38% lower in patients who received an SMS reminder than in patients who did not receive a reminder (RR of non-attendance = 0.62; 95% CI = 0.48 – 0.80. Conclusion The use of SMS reminders for ophthalmology outpatient appointments was associated with a reduction of 38% in the likelihood of patients not attending their appointments, compared to no appointment reminder. The use of SMS reminders may also be more cost-effective than traditional appointment reminders and require less labour. These findings should be confirmed with a more rigorous study design before a wider roll-out.

  14. Fast, selective adsorption of Cu{sup 2+} from aqueous mixed metal ions solution using 1,4,7-triazacyclononane modified SBA-15 silica adsorbent (SBA-TACN)

    Energy Technology Data Exchange (ETDEWEB)

    Tapaswi, Pradip Kumar; Moorthy, Madhappan Santha; Park, Sung Soo; Ha, Chang-Sik, E-mail: csha@pnu.edu

    2014-03-15

    A new SBA-15 supported 1,4,7-triazacyclononane modified mesoporous silica adsorbent (SBA-TACN) has been synthesized using post grafting route and has thoroughly been characterized by small angle X-ray scattering (SAXS), N{sub 2} adsorption–desorption measurements, Fourier-transform infrared (FT-IR), solid-state {sup 29}Si MAS and {sup 13}C CP MAS NMR spectroscopy, transmission electron (TEM) and scanning electron microscopy (SEM), elemental analysis (EA) and thermogravimetric analysis (TGA). The synthesized material shows excellent copper (II) ion adsorption selectivity at pH 5 in mixed metal ion solution containing Cu{sup 2+}, Cr{sup 3+}, Ni{sup 2+}, Co{sup 2+} and Li{sup +}. The copper ion adsorption capacity of the SBA-TACN can reach a maximum value of 0.67 mmol/g. Possible adsorption mechanism of metal ions on SBA-TACN has been discussed. The adsorbent can be readily regenerated by HNO{sub 3}–NH{sub 3} treatment. -- Graphical abstract: A new SBA-15 supported 1,4,7-triazacyclononane (TACN) modified mesoporous silica (SBA-TACN) adsorbent has been developed which shows excellent selectivity in Cu{sup 2+} adsorption from aqueous mixed metal ion solutions at pH 5. The copper ion adsorption capacity of the SBA-TACN can reach a maximum value of 0.67 mmol/g. The adsobent is stable enough to be used atleast for three cycles. Highlights: • Synthesis of a new TACN modified mesoporous silica SBA-15 type adsorbent. • The density of 1,4,7-triazacyclononane on SBA-15 is 1.22 mmol/g. • First report on the selective Cu{sup 2+} adsorption by TACN modified mesoporous silica. • Cu{sup 2+} adsorption capacity of the SBA-TACN can reach a maximum value of 0.67 mmol/g. • Potential candidate for selective removal of Cu{sup 2+} from contaminated water samples.

  15. Tailoring p- and n- type semiconductor through site selective oxygen doping in Cu3N: density functional studies

    Science.gov (United States)

    Sahoo, Guruprasad; Kashikar, Ravi; Jain, Mahaveer K.; Nanda, B. R. K.

    2016-06-01

    Using ab initio density functional calculations, we have investigated the stability and electronic structure of pure and oxygen doped semiconducting Cu3N. The oxygen can be accommodated in the system without structural instability as the formation energy either decreases when oxygen substitutes nitrogen, or remains nearly same when oxygen occupies the interstitial position. The interstitial oxygen (OI) prefers to stabilize in the unusual charge neutral state and acts as an acceptor to make the system a p-type degenerate semiconductor. In this case the hole pockets are formed by the partially occupied OI-p states. On the other hand, oxygen substituting nitrogen (OS) stabilizes in its usual -2 charge state and acts as a donor to make the system an n-type degenerate semiconductor. The electron pockets are formed by the conducting Cu-p states. In the case of mixed doping, holes are gradually compensated by the donor electrons and an intrinsic gap is obtained for {{{Cu}}}3{{{N}}}{1-2{x}}{{{{O}}}{{S}}}2{x}{{{{O}}}{{I}}}{x} stoichiometry. Our calculations predict the nature of doping as well as optical band gap ({{E}{{g}}}{{o}{{p}}{{t}}}) variation in experimentally synthesized copper oxynitride. While interstitial doping contracts the lattice and increases the {{E}{{g}}}{{o}{{p}}{{t}}}, substitutional doping increases both lattice size and {{E}{{g}}}{{o}{{p}}{{t}}}. Mixed doping reduces {{E}{{g}}}{{o}{{p}}{{t}}}. Additionally we show that a rare intra-atomic d-p optical absorption can be realized in the pristine Cu3N as the Fermi level lies in the gap between the Cu-d dominated anti-bonding valence state and Cu-p conducting state.

  16. A novel piperazine-bis(rhodamine-B)-based chemosensor for highly sensitive and selective naked-eye detection of Cu{sup 2+} and its application as an INHIBIT logic device

    Energy Technology Data Exchange (ETDEWEB)

    Sun, Zebin; Li, Haizhen; Guo, Dan; Liu, Yan; Tian, Zhang; Yan, Shiqiang, E-mail: yansq@lzu.edu.cn

    2015-11-15

    Abstact: We report the design and synthesis of a new piperazine-bis(rhodamine-B) (RB-P-RB)-based indicator for selective detection of Cu{sup 2+} ion. Optical sensing behavior toward various metal ions including alkali, alkaline earth and transition metal ions (Na{sup +}, K{sup +}, Ba{sup 2+}, Mg{sup 2+}, Ca{sup 2+}, Zn{sup 2+}, Cd{sup 2+}, Mn{sup 2+}, Co{sup 2+}, Ni{sup 2+}, Pb{sup 2+}, Cu{sup 2+}, Hg{sup 2+}, and Ag{sup +}) were investigated by UV–vis and fluorescence spectroscopy in ethassnol solution. The indicator showed highly selective and sensitive colorimetric and “turn-on” fluorescence enhancement responses toward Cu{sup 2+} ion owing to the ring-opening structure of the rhodamine spirolactam. The significant change from colorless to pink upon the addition of Cu{sup 2+} could make it a suitable “naked-eye” indicator for Cu{sup 2+}. Furthermore, a possible ring-opening mechanism (off-on) of the rhodamine spirolactam induced by Cu{sup 2+} binding is supported by Job plot, ESI-mass, FT-IR, and {sup 1}H NMR. More significantly, the probe displayed highly selective Cu{sup 2+}-amplified absorption in the presence of Cu{sup 2+} ions. Finally, using Cu{sup 2+} and EDTA as inputs and the fluorescence emission intensity as output, an INHIBIT logic gate can be constructed at the molecular level. - Highlights: • A novel piperazine-bis(rhodamine-B)-based sensor for selective detection of Cu{sup 2+} ion was synthesized via simple synthetic procedures. • The probe exhibited highly selective and sensitive colorimetric and “turn on” fluorescence enhancement responses to Cu{sup 2+}. • The probe can serve as a reversible and selective “naked eye” indicator for Cu{sup 2+} ions in ethanol solution. • The probe can be utilized to construct an INHIBIT logic gate at the molecular level. • The probe displays highly selective Cu{sup 2+}-amplified absorption in ethanol solution.

  17. Silica functionalized Cu(II) catalysed selective oxidation of benzyl alcohols using TEMPO and molecular oxygen as an oxidant

    Indian Academy of Sciences (India)

    Manjulla Gupta; Pankaj Sharma; Monika Gupta; Rajive Gupta

    2015-08-01

    A general scheme for the oxidation of benzyl alcohols catalyzed by silica functionalized copper (II) has been designed. TEMPO, a free radical, assists this oxidation that was initiated by molecular oxygen which converts it to a primary oxidant. This catalytic combination i.e. SiO2 -Cu(II) in presence of TEMPO and oxygen provides excellent results in terms of yields and reaction time. SiO2 -Cu(II) was very well characterized by different spectroscopic techniques such as FTIR, XRD, TGA, XPS, EDAX, SEM, TEM and AAS and is recyclable upto five times which makes it economically beneficial.

  18. A selective nanocatalyst for an efficient Ugi reaction: Magnetically recoverable Cu(acac)2/NH2-T/SiO2@Fe3O4 nanoparticles

    Indian Academy of Sciences (India)

    Monireh Ghavami; Maryam Koohi; Mohammad Zaman Kassaee

    2013-11-01

    A novel, magnetically recoverable nanocatalyst is fabricated through simple immobilization of copper(II) acetylacetonate on the surface of amine-terminated silica-coated Fe3O4 nanoparticles: Cu(acac)2/NH2-T/SiO2@Fe3O4NPs. Unambiguous bonding of Cu to the terminal amine is indicated by Xray photoelectron spectroscopy (XPS). Further characterizations are carried out by different techniques. Selectivity of this catalyst is demonstrated through one-pot synthesis of fourteen α-aminoacyl amides using Ugi four-component reaction of cyclohexyl isocyanide, acetic acid, amines and various aldehydes. Interestingly, all aromatic aldehydes react with short reaction times and high yields, but heteroaromatic aldehydes do not yield any product. Catalyst efficiency remains unaltered through three consecutive experiments.

  19. Synthesis of a Dehydroabietyl Derivative Bearing a 2-(2′-Hydroxyphenyl Benzimidazole Unit and Its Selective Cu2+ Chemosensing

    Directory of Open Access Journals (Sweden)

    Ying-Ming Pan

    2010-12-01

    Full Text Available A dehydroabietyl derivative 2 bearing a 2-(2′-hydroxyphenylbenzimidazole unit was synthesized and its sensing behaviors toward metal ions were investigated by UV-Vis and fluorescence spectroscopy methods. In THF solution, compound 2 exhibited excellent selectivity for Cu(II over miscellaneous other metal ions including Cr(II, Mn(II, Co(II, Ni(II, Zn(II, Cd(II, Al(III, Mg(II, Pb(II, Hg(II, Na(I, Li(I and K(I evidenced through the quenching of the fluorescence of the benzimidazole fragment. The reaction between 2 and Cu2+ was found to be stoichiometric with the formation of a 1:1 complex.

  20. Improvement of catalytic activity in selective oxidation of styrene with H{sub 2}O{sub 2} over spinel Mg–Cu ferrite hollow spheres in water

    Energy Technology Data Exchange (ETDEWEB)

    Tong, Jinhui, E-mail: jinhuitong@126.com [Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education, Lanzhou 730070 (China); Key Laboratory of Gansu Polymer Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070 (China); Cai, Xiaodong; Wang, Haiyan; Zhang, Qianping [Key Laboratory of Eco-Environment-Related Polymer Materials, Ministry of Education, Lanzhou 730070 (China); Key Laboratory of Gansu Polymer Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070 (China)

    2014-07-01

    Graphical abstract: Uniform spinel Mg–Cu ferrite hollow spheres were prepared using carbon spheres as templates. Solid spinel Mg{sub 0.5}Cu{sub 0.5}Fe{sub 2}O{sub 4} ferrite nanocrystals were also prepared by sol–gel auto-combustion, hydrothermal and coprecipitation methods for comparison. The samples were found to be efficient catalysts for oxidation of styrene using hydrogen peroxide as oxidant. Especially, in the case of Mg{sub 0.5}Cu{sub 0.5}Fe{sub 2}O{sub 4} hollow spheres, obvious improvement on catalytic activity was observed and 21.2% of styrene conversion and 75.2% of selectivity for benzaldehyde were obtained at 80 °C for 6 h reaction in water. The catalyst can be magnetically separated easily for reuse and no obvious loss of activity was observed when reused in six consecutive runs. - Highlights: • Uniform spinel ferrite hollow spheres were prepared by a simple method. • The catalyst has been proved much more efficient for styrene oxidation than the reported analogues. • The catalyst can be easily separated by external magnetic field and has exhibited excellent reusability. • The catalytic system is environmentally friendly. - Abstract: Uniform spinel Mg–Cu ferrite hollow spheres were prepared using carbon spheres as templates. For comparison, solid Mg–Cu ferrite nanocrystals were also prepared by sol–gel auto-combustion, hydrothermal and coprecipitation methods. All the samples were characterized by Fourier transform infrared spectrophotometry (FT-IR), X-ray diffractometry (XRD), transmission electron microscopy (TEM) and N{sub 2} physisorption. The samples were found to be efficient catalysts for oxidation of styrene using hydrogen peroxide as oxidant. Especially, in the case of Mg{sub 0.5}Cu{sub 0.5}Fe{sub 2}O{sub 4} hollow spheres, obvious improvement on catalytic activity was observed, and 21.2% of styrene conversion and 75.2% of selectivity for benzaldehyde were obtained at 80 °C for 6 h reaction in water. The catalyst can be

  1. Effect of the preparation method on the performance of CuO-MnO x-CeO 2 catalysts for selective oxidation of CO in H 2-rich streams

    Science.gov (United States)

    Li, Jing; Zhu, Pengfei; Zhou, Renxian

    Selective oxidation of CO in H 2-rich streams is performed over a series of CuO-MnO x-CeO 2 catalysts prepared by hydrothermal (CuMC-HY), co-precipitation (CuMC-CP), impregnation (CuMC-IM) and citrate sol-gel (CuMC-SG) methods. The catalysts are characterized by N 2 adsorption/desorption, XRD, SEM, HR-TEM, TPR and XPS techniques. The results show that the catalyst prepared by a hydrothermal method exhibits the best catalytic activity, especially at low temperatures. The temperature of 50% CO conversion (T 50) is only 74 °C and the temperature window of CO conversions up to 99.0% is about 40 °C wide, from 110 to 140 °C. Moreover, the temperature window is still maintained 20 °C wide even at lower temperatures when there are 15% CO 2 and 7.5% H 2O in the reaction gas. The superior catalytic performance of CuMC-HY is attributed to the formation of Mn-Cu-Ce-O solid solution, the unique pore structure and the existence of more Cu + and Mn 4+ species as well as oxygen vacancies. The sequence of catalytic activity is as follows: CuMC-HY > CuMC-SG > CuMC-IM > CuMC-CP. The worst catalytic activity, obtained from the catalyst prepared by the co-precipitation method, is possibly related to the existence of independent CuO x and MnO x oxides, which weakly interact with ceria in the catalyst.

  2. Competitive coordination of Cu2+ between cysteine and pyrophosphate ion: toward sensitive and selective sensing of pyrophosphate ion in synovial fluid of arthritis patients.

    Science.gov (United States)

    Deng, Jingjing; Yu, Ping; Yang, Lifen; Mao, Lanqun

    2013-02-19

    Direct selective and sensitive sensing of pyrophosphate ion (PPi) in synovial fluid of arthritis patients is of great importance because of its crucial roles in the diagnosis and therapy of arthritic diseases. In this study, we demonstrate a sensitive and selective method for PPi sensing in synovial fluid of arthritis patients with gold nanoparticles (Au-NPs) as the signal readout based on the competitive coordination chemistry of Cu(2+) between cysteine and PPi. Initially, Au-NPs stabilized with cysteine are red in color and exhibit absorption at 519 nm in the UV-vis spectrum. The addition of an aqueous solution of Cu(2+) to the Au-NPs dispersion containing cysteine causes the aggregation of Au-NPs, resulting in the wine red-to-blue color change and the appearance of a new absorption at 650 nm in the UV-vis spectrum of the Au-NPs dispersion. The subsequent addition of PPi to the Au-NPs aggregation well solubilizes the aggregated Au-NPs with the changes in both the color and the UV-vis spectrum of the Au-NPs dispersion. These changes are ascribed to the higher coordination reactivity between Cu(2+) and PPi than that between Cu(2+) and cysteine. On the basis of this, the concentration of PPi can be visualized with the naked eyes through the blue-to-wine red color change of the Au-NPs dispersion and quantitatively determined by UV-vis spectroscopy. Under the optimized conditions, the ratio of the absorbance at 650 nm (A(650)) to that at 519 nm (A(519)) shows a linear relationship with PPi concentration within a concentration range from 130 nM to 1.3 mM. The method demonstrated here is highly sensitive, free from the interference from other species in the synovial fluid, and is thus particularly useful for fast and simple clinic diagnosis of arthritic diseases.

  3. On the Value of Nonremovable Reminders for Behavior Modification: An Application to Nail-Biting (Onychophagia)

    Science.gov (United States)

    Koritzky, Gilly; Yechiam, Eldad

    2011-01-01

    The authors examined the effectiveness of a novel behavior modification method for dysfunctional and impulsive habits, based on nonremovable reminders (NrRs). NrRs were implemented by having participants wear nonremovable wristbands designated to constantly remind them of their resolution to quit the targeted habit (nail-biting). Participants were…

  4. Highly selective bimetallic Pt-Cu/Mg(Al)O catalysts for the aqueous-phase reforming of glycerol

    NARCIS (Netherlands)

    Boga, D.A.; Oord, R.; Beale, A.M.; Chung, Y.M.; Bruijnincx, P.C.A.; Weckhuysen, B.M.

    2013-01-01

    Monometallic Pt and bimetallic Pt-Cu catalysts supported on Mg(Al)O mixed oxides, obtained by calcination of the corresponding layered double hydroxides (LDHs), were prepared and tested in the aqueous-phase reforming (APR) of glycerol. The effect of the Mg/Al ratio and calcination temperature of the

  5. Pilot and feasibility test of adolescent-controlled text messaging reminders.

    Science.gov (United States)

    Britto, Maria T; Munafo, Jennifer Knopf; Schoettker, Pamela J; Vockell, Anna-Liisa B; Wimberg, Janet A; Yi, Michael S

    2012-02-01

    This pilot study assessed the feasibility, acceptability, and utility of a text messaging system that allowed teenagers with asthma to generate and control medical reminders sent to their mobile phones. The 12 teens in the study group were able to create their own reminder text messages, add or change reminders, and determine when and how often the messages were sent to their cell phone. In total, 18 of the 21 unique messages created were reminders to take medication. No teen made changes to their original text messages or delivery schedule on their own. They gave high ratings on the usefulness, acceptability, and ease of use of the text messaging system. Self-reported asthma control at baseline was similar for both the study and comparison groups and did not change significantly. Allowing teens to control the timing and content of reminder text messages may support self-management of chronic disease.

  6. Improving health worker adherence to malaria treatment guidelines in Papua New Guinea: feasibility and acceptability of a text message reminder service.

    Directory of Open Access Journals (Sweden)

    Serah F Kurumop

    Full Text Available The aim of this study is to assess whether a text message reminder service designed to support health worker adherence to a revised malaria treatment protocol is feasible and acceptable in Papua New Guinea (PNG. The study took place in six purposively selected health facilities located in the Eastern Highlands Province (EHP of PNG. Ten text messages designed to remind participants of key elements of the new NMTP were transmitted to 42 health workers twice over a two week period (two text messages per day, Monday to Friday via the country's largest mobile network provider. The feasibility and acceptability of the text message reminder service was assessed by transmission reports, participant diaries and group discussions. Findings indicate that the vast majority of text messages were successfully transmitted, participants' had regular mobile phone access and that most text messages were read most of the time and were considered both acceptable and clinically useful. Nevertheless, the study found that PNG health workers may tire of the service if the same messages are repeated too many times and that health workers may be reluctant to utilize more comprehensive, yet complementary, resources. In conclusion, a text message reminder service to support health worker adherence to the new malaria treatment protocol is feasible and acceptable in PNG. A rigorous pragmatic, effectiveness trial would be justified on the basis of these findings.

  7. Sensors based on mesoporous SnO{sub 2}-CuWO{sub 4} with high selective sensitivity to H{sub 2}S at low operating temperature

    Energy Technology Data Exchange (ETDEWEB)

    Stanoiu, Adelina; Simion, Cristian E. [National Institute of Materials Physics, Atomistilor 405A, P.O. Box MG-7, 077125 Bucharest, Măgurele (Romania); Calderon-Moreno, Jose Maria; Osiceanu, Petre [“Ilie Murgulescu” Institute of Physical Chemistry, Romanian Academy, Surface Chemistry and Catalysis Laboratory, Spl. Independentei 202, 060021, Bucharest (Romania); Florea, Mihaela [University of Bucharest, Faculty of Chemistry, Department of Organic Chemistry, Biochemistry and Catalysis, B-dul Regina Elisabeta 4-12, Bucharest (Romania); National Institute of Materials Physics, Atomistilor 405A, P.O. Box MG-7, 077125 Bucharest, Măgurele (Romania); Teodorescu, Valentin S. [National Institute of Materials Physics, Atomistilor 405A, P.O. Box MG-7, 077125 Bucharest, Măgurele (Romania); Somacescu, Simona, E-mail: somacescu.simona@gmail.com [“Ilie Murgulescu” Institute of Physical Chemistry, Romanian Academy, Surface Chemistry and Catalysis Laboratory, Spl. Independentei 202, 060021, Bucharest (Romania)

    2017-06-05

    Highlights: • Mesoporous SnO{sub 2}-CuWO{sub 4} obtained by an inexpensive synthesis route. • Powders characterization performed by a variety of complementary techniques. • SnO{sub 2}-CuWO{sub 4} layers with high selective sensitivity to H{sub 2}S. • Low operating temperature and relative humidity influences. - Abstract: Development of new sensitive materials by different synthesis routes in order to emphasize the sensing properties for hazardous H{sub 2}S detection is one of a nowadays challenge in the field of gas sensors. In this study we obtained mesoporous SnO{sub 2}-CuWO{sub 4} with selective sensitivity to H{sub 2}S by an inexpensive synthesis route with low environmental pollution level, using tripropylamine (TPA) as template and polyvinylpyrrolidone (PVP) as dispersant/stabilizer. In order to bring insights about the intrinsic properties, the powders were characterized by means of a variety of complementary techniques such as: X-Ray Diffraction, XRD; Transmission Electron Microscopy, TEM; High Resolution TEM, HRTEM; Raman Spectroscopy, RS; Porosity Analysis by N{sub 2} adsorption/desorption, BET; Scanning Electron Microscopy, SEM and X-ray Photoelectron Spectroscopy, XPS. The sensors were fabricated by powders deposition via screen-printing technique onto planar commercial Al{sub 2}O{sub 3} substrates. The sensor signals towards H{sub 2}S exposure at low operating temperature (100 °C) reaches values from 10{sup 5} (for SnWCu600) to 10{sup 6} (for SnWCu800) over the full range of concentrations (5–30 ppm). The recovery processes were induced by a short temperature trigger of 500 °C. The selective sensitivity was underlined with respect to the H{sub 2}S, relative to other potential pollutants and relative humidity (10–70% RH).

  8. Selective photocatalytic reduction of CO2 to methanol in CuO-loaded NaTaO3 nanocubes in isopropanol

    Directory of Open Access Journals (Sweden)

    Tianyu Xiang

    2016-06-01

    Full Text Available A series of NaTaO3 photocatalysts were prepared with Ta2O5 and NaOH via a hydrothermal method. CuO was loaded onto the surface of NaTaO3 as a cocatalyst by successive impregnation and calcination. The obtained photocatalysts were characterized by XRD, SEM, UV–vis, EDS and XPS and used to photocatalytically reduce CO2 in isopropanol. This worked to both absorb CO2 and as a sacrificial reagent to harvest CO2 and donate electrons. Methanol and acetone were generated as the reduction product of CO2 and the oxidation product of isopropanol, respectively. NaTaO3 nanocubes loaded with 2 wt % CuO and synthesized in 2 mol/L NaOH solution showed the best activity. The methanol and acetone yields were 137.48 μmol/(g·h and 335.93 μmol/(g·h, respectively, after 6 h of irradiation. Such high activity could be attributed to the good crystallinity, morphology and proper amount of CuO loading, which functioned as reductive sites for selective formation of methanol. The reaction mechanism was also proposed and explained by band theory.

  9. Graphene-analogue carbon nitride: novel exfoliation synthesis and its application in photocatalysis and photoelectrochemical selective detection of trace amount of Cu²⁺.

    Science.gov (United States)

    Xu, Hui; Yan, Jia; She, Xiaojie; Xu, Li; Xia, Jiexiang; Xu, Yuanguo; Song, Yanhua; Huang, Liying; Li, Huaming

    2014-01-01

    Graphene-analogue nanostructures defined as a new kind of promising materials with unique electronic, surface and optical properties have received much attention in the fields of catalysis, energy storage, sensing and electronic devices. Due to the distinctive structure characteristics of the graphene-analogue materials, they brought novel and amazing properties. Herein, graphene-analogue carbon nitride (GA-C₃N₄) was synthesized by high-yield, large-scale thermal exfoliation from the graphitic C₃N₄-based intercalation compound. Graphene-analogue carbon nitride exhibited 2D thin-layer structure with 6-9 atomic thickness, a high specific surface area of 30.1 m(2) g(-1), increased photocurrent responses and improved electron transport ability, which could give rise to enhancing the photocatalytic activity and stability. The graphene-analogue carbon nitride had a new features that could make it suitable as a sensor for Cu(2+) determination. So GA-C₃N₄ is a new but promising candidate for heavy metal ions (Cu(2+)) determination in water environment. The photocatalytic mechanism and photoelectrochemical selective sensing of Cu(2+) were also discussed.

  10. Synthesis of Fe–Cu/TiO{sub 2} nanostructure and its use in construction of a sensitive and selective sensor for metformin determination

    Energy Technology Data Exchange (ETDEWEB)

    Gholivand, Mohammad Bagher, E-mail: mbgholivand@yahoo.com; Shamsipur, Mojtaba; Paimard, Giti; Feyzi, Mostafa; Jafari, Fataneh

    2014-09-01

    A carbon paste electrode modified with Fe-Cu/TiO{sub 2} was prepared and used for low level determination of metformin (MET) using square wave adsorptive stripping voltammetry (SWAdSV). The Fe-Cu/TiO{sub 2} nanoparticle was synthesized by a modified sol–gel method. The surface structure and composition of nanoparticles were characterized by scanning electron microscopy (SEM), X-ray powder diffraction analysis (XRD) and N{sub 2} physisorption. Also, electrochemical properties of the prepared nanocomposite modified electrode were investigated by cyclic voltammetry and electrochemical impedance spectroscopy (EIS) techniques. Under optimized conditions, the modified electrode exhibited a linear response over the concentration range of 15 nM to 75 μM MET, with a detection limit of 3 nM. The proposed sensor exhibited a high sensitivity, good selectivity and was successfully applied for MET determination in real samples such as human urine and pharmaceutical formulations. - Highlights: • A carbon paste modified electrode for determination of MET was developed. • The synthesized Fe-Cu/TiO{sub 2} nanocomposite was used as a modifier. • The sensor was successfully applied for MET determination in real samples. • Square wave adsorptive stripping voltammetric method was used for MET determination.

  11. Evaluation of magnetic terms in Cu4O4 cubane-like systems from selected configuration interaction calculations: a case study of polynuclear transition-metal systems.

    Science.gov (United States)

    Calzado, Carmen J; Maynau, Daniel

    2011-11-21

    We present the evaluation of magnetic terms in a Cu(4)O(4) cubane-like system from truncated CI calculations, as a case study of polynuclear transition-metal complexes. We employ a new excitation selected configuration interaction (EXSCI) method based on the use of local orbitals. Taking advantage of the locality and then of the fact that the interactions vanish when the distance is large, the dimension of the CI is largely reduced. To the best of our knowledge these CI calculations are the largest one performed for polynuclear transition metal systems so far. The results show the presence of two leading ferromagnetic interactions between bridged Cu ions. Also the interactions between the unbridged Cu ions are ferromagnetic, but very weak, in contrast to the experimental data. The nature and amplitude of all the computed interactions are consistent with the relative orientation of the magnetic orbitals in the molecule, and correctly reproduce the susceptibility versus temperature curve. Our results indicate that it is possible to obtain similar fittings with sets of parameters representing different physical effects and put in evidence the drawbacks of the fitting based on oversimplified magnetic models. In this context, the presented computational strategy can be considered as a useful tool to help in the interpretation of the magnetic data and the validation of the magnetic interaction model in the polynuclear magnetic systems.

  12. Study on the mechanism of NH3-selective catalytic reduction over CuCexZr1-x/TiO2

    Science.gov (United States)

    Chen, Xujuan; Sun, Xiaoliang; Gong, Cairong; Lv, Gang; Song, Chonglin

    2016-06-01

    Copper-cerium-zirconium catalysts loaded on TiO2 prepared by a wet impregnation method were investigated for NH3-selective catalytic reduction (SCR) of NOx. The reaction mechanism was proposed on the basis of results from in situ diffuse reflectance infrared transform spectroscopy (DRIFT). When NH3 is introduced, ammonia bonded to Lewis acid sites is more stable over CuCe0.25Zr0.75/TiO2 at high temperature, while Brønsted acid sites are more important than Lewis acid sites at low temperature. For the NH3+NO+O2 co-adsorption, NH3 species occupy most of activity sites on CuCe0.25Zr0.75/TiO2 catalyst, and mainly exist in the forms of NH4 + (at low temperature) and NH3 coordinated (at high temperature), playing a crucial role in the NH3-SCR process. Two different reaction routes, the L-H mechanism at low temperature ( 200°C), are presented for the SCR reaction over CuCe0.25Zr0.75/TiO2 catalyst.

  13. High storage capacity and separation selectivity for C2hydrocarbons over methane in the metal-organic framework Cu-TDPAT

    KAUST Repository

    Liu, Kang

    2014-01-01

    We report on the storage capacity and separation selectivity of an rht-type metal-organic framework, Cu-TDPAT [TDPAT = 2,4,6-tris(3,5-dicarboxylphenylamino)-1,3,5-triazine], for C2hydrocarbons over CH4. Henry\\'s constant, the isosteric heat of adsorption and the ideal adsorbed solution theory selectivity were calculated based on single-component sorption isotherms. Theoretical calculations indicate that both the open metal sites and the Lewis basic sites have strong interactions with the C2molecules. The combination of these two kinds of sites lead to the highest C2H2-CH4selectivity of 127.1 as well as record high values for C2H4adsorption enthalpies. To mimic real-world conditions, breakthrough experiments were conducted on an equimolar four-component mixture containing C2H2, C2H4, C2H6and CH4at room temperature and 1 atm pressure. Our results show that Cu-TDPAT is a promising candidate for CH4capture and purification. This journal is

  14. Structural and kinetic changes to small-pore Cu-zeolites after hydrothermal aging treatments and selective catalytic reduction of NO_x with ammonia

    OpenAIRE

    Albarracin-Caballero, Jonatan D.; Khurana, Ishant; Di Iorio, John R.; Shih, Arthur J.; Schmidt, Joel E.; Dusselier, Michiel; Davis, Mark E.; Yezerets, Aleksey; Miller, Jeffrey T.; Ribeiro, Fabio H.; Gounder, Rajamani

    2016-01-01

    Three small-pore, eight-membered ring (8-MR) zeolites of different cage-based topology (CHA, AEI, RTH), in their proton- and copper-exchanged forms, were first exposed to high temperature hydrothermal aging treatments (1073 K, 16 h, 10% (v/v) H_2O) and then to reaction conditions for low temperature (473 K) standard selective catalytic reduction (SCR) of NO_x with ammonia, in order to study the effect of zeolite topology on the structural and kinetic changes that occur to Cu-zeolites used in ...

  15. Analysis of high and selective uptake of CO2 in an oxamide-containing {Cu2(OOCR)4}-based metal-organic framework.

    Science.gov (United States)

    Alsmail, Nada H; Suyetin, Mikhail; Yan, Yong; Cabot, Rafel; Krap, Cristina P; Lü, Jian; Easun, Timothy L; Bichoutskaia, Elena; Lewis, William; Blake, Alexander J; Schröder, Martin

    2014-06-10

    The porous framework [Cu2(H2O)2L]⋅4 H2O⋅2 DMA (H4L = oxalylbis(azanediyl)diisophthalic acid; DMA = N,N-dimethylacetamide), denoted NOTT-125, is formed by connection of {Cu2(RCOO)4} paddlewheels with the isophthalate linkers in L(4-). A single crystal structure determination reveals that NOTT-125 crystallises in monoclinic unit cell with a = 27.9161(6), b = 18.6627(4) and c = 32.3643(8) Å, β = 112.655(3)°, space group P2(1)/c. The structure of this material shows fof topology, which can be viewed as the packing of two types of cages (cage A and cage B) in three-dimensional space. Cage A is constructed from twelve {Cu2(OOCR)4} paddlewheels and six linkers to form an ellipsoid-shaped cavity approximately 24.0 Å along its long axis and 9.6 Å across its central diameter. Cage B consists of six {Cu2(OOCR)4} units and twelve linkers and has a spherical diameter of 12.7 Å taking into account the van der Waals radii of the atoms. NOTT-125 incorporates oxamide functionality within the pore walls, and this, combined with high porosity in desolvated NOTT-125a, is responsible for excellent CO2 uptake (40.1 wt % at 273 K and 1 bar) and selectivity for CO2 over CH4 or N2. Grand canonical Monte Carlo (GCMC) simulations show excellent agreement with the experimental gas isotherm data, and a computational study of the specific interactions and binding energies of both CO2 and CH4 with the linkers in NOTT-125 reveals a set of strong interactions between CO2 and the oxamide motif that are not possible with a single amide.

  16. Fabrication of highly sensitive and selective nanocomposite film based on CuNPs/fullerene-C60/MWCNTs: An electrochemical nanosensor for trace recognition of paracetamol.

    Science.gov (United States)

    Brahman, Pradeep Kumar; Suresh, Lakkavarapu; Lokesh, Veeramacheneni; Nizamuddin, Syed

    2016-04-21

    Designing an electrochemical sensor for versatile clinical applications is a sophisticated task and how dedicatedly functionalized composite materials can perform on this stage is a challenge for today and tomorrow's Nanoscience and Nanotechnology. In the present work, we demonstrate a new strategy for the development of novel electrochemical sensor based on catalytic nanocomposite film. Fullerene-C60 and multi-walled carbon nanotubes (MWCNTs) were dropped on the pre-treated carbon paste electrode (CPE) and copper nanoparticles (CuNPs) electrochemically deposited on the modified CPE to form nanocomposite film of CuNPs/C60/MWCNTs/CPE. In this work, an electrochemical method based on square wave voltammetry (SWV) employing CuNPs/C60/MWCNTs/CPE has been presented for the recognition and determination of paracetamol (PT). Developed electrochemical sensor was characterized using cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and chronocoulometry. The composite film made the fabricated sensor to display high sensitivity and good selectivity for PT detection. The influence of the optimization parameters such as pH, accumulation time, deposition potential, scan rate and effect of loading of composite mixture of C60-MWCNTs and CuNPs on the electrochemical performance of the sensor were evaluated. A linear range from 4.0 × 10(-9) to 4.0 × 10(-7) M for PT detection was obtained with a detection limit of 7.3 × 10(-11) M. The fabricated sensor was successfully applied to the detection of PT in biological samples with good recovery ranging from 99.21 to 103%.

  17. Concentration of Zn, Cu and Pb in Some Selected Marine Fishes of the Pahang Coastal Waters, Malaysia

    Directory of Open Access Journals (Sweden)

    B. Y. Kamaruzzaman

    2010-01-01

    Full Text Available Problem statement: Heavy metals constitute one of the most hazardous substances that could be accumulated in biota. Fish populations exploited by man often live in coastal area environments that contain high levels of heavy metals, coming from human activities such as industrial and agricultural wastes. A problem to deal when using fishes as biomonitors of heavy metals is the relationship existing between metal concentration and several intrinsic factors of the fish such as organism size, genetic composition and age of fish. Approach: Concentration of Zn, Cu and Pb were determined in eight commercially valuable fish species, Selaroides leptolepis, Euthynnus affinis, Parastromateus niger, Lutjanius malabaricus, Epinephelus sexfasciatus, Rastrelliger kanagurta, Nemipterus japonicus and Megalaspis cordyla from Pahang coastal water. The concentration was measured by Inductively Coupled Plasma Mass Spectrometry (ICP-MS. The study focuses on the level of Zn, Cu and Pb in order to assess the environmental pollution by using fishes as an indicator. Results: Concentrations of the heavy metals in examined fish species ranged as follow: Zn 19.27 µg g-1 dry weight; Cu 2.88 µg g-1 dry weight and Pb 0.26 µg g-1 dry weight, respectively. The concentrations of Zn, Cu and Pb were found to follow the order: stomach > muscle > gills. Significant correlations were found between fish weight and heavy metals concentration in the fish organs. Conclusion: The estimated values of all metals in muscles of fish in this study were below the established values. Therefore, it can be concluded that the fish from Pahang coastal water are comparatively clean and do not constitute a risk for human health.

  18. Reminder: Alcohol abuse, road traffic and safety on the site

    CERN Multimedia

    HSE Unit

    2011-01-01

    You are reminded that: - the legal blood alcohol limit in force under the Host States’ traffic regulations (0.5 g per 1000 ml of blood) also applies on the CERN site; - the consumption of alcohol is forbidden during working hours and is only tolerated in the restaurants at certain times, unless an exception is granted for special events (Operational Circular No. 8); - failure to observe these rules may result in disciplinary action by the Organization, independently of any sanctions that may be applicable pursuant to the road traffic regulations of the Host State concerned. Furthermore, the Reception and Access Control Service, the site guards and the Fire Brigade have been instructed to stop any driver in an obvious state of intoxication and to ask him/her to abandon the vehicle on the spot. In case of disagreement, they may also suggest that he/she submits to a voluntary blood alcohol level test at the CERN Medical Service or Fire Brigade. They will also stop and question any obviously intoxicate...

  19. Reminder: Bike safety – e-learning module still available!

    CERN Multimedia

    HSE Unit

    2014-01-01

    The “Safe bike riding” e-learning module offered by the Safety Training Section of the HSE Unit is designed for anyone who uses a bike on the CERN site.   The course, which takes around 10 minutes to complete, can be accessed via the SIR application. It presents safety information, such as the road traffic rules, and practical advice, such as the appropriate safety equipment to wear and to have fitted to your bike. Regarding the rules, we would like to remind you that CERN's Safety Code A7 applies to cyclists as well as motorists.  The training module was created by the accident prevention service of the HSE Unit after it was noticed that the number of occupational accidents involving cyclists had been constantly increasing since 2008, with a rise from about 20 in 2009 to about 50 in 2013. Since its launch in September 2013, the course has been taken by more than 670 people. It can be completed at any time, in either English or French. The Safety T...

  20. REMINDER - FRENCH CARDS - NEW PROCEDURE FOR INITIAL APPLICATION

    CERN Multimedia

    Human Resources Division

    2002-01-01

    The Human Resources Division would like to remind members of personnel that they are obliged to submit an application form for a French card as soon as they have a permanent address in either Switzerland or in France and they are actually living there. Following the rationalization of our administrative procedures, as of October 1st, 2002, the initial application procedure for a French card will now be as follows: The member of personnel should complete an application form. If necessary, an application form must also be completed for family members. These forms must then be transferred via e-mail to the appropriate Divisional Administrative Officer (DAO) who will forward them to the Cards Service. In parallel, the member of personnel should submit the necessary supporting documents to the Cards Service. Users are requested to apply for a French card through the Users' Office. The application form (Word format only), the procedural details, the necessary supporting documents as well as the conditions of issue ...

  1. The relationship between electronic nursing care reminders and missed nursing care.

    Science.gov (United States)

    Piscotty, Ronald J; Kalisch, Beatrice

    2014-10-01

    The purpose of the study was to explore relationships between nurses' perceptions of the impact of health information technology on their clinical practice in the acute care setting, their use of electronic nursing care reminders, and episodes of missed nursing care. The study aims were accomplished with a descriptive design using adjusted correlations. A convenience sample (N = 165) of medical and/or surgical, intensive care, and intermediate care RNs working on acute care hospital units participated in the study. Nurses from 19 eligible nursing units were invited to participate. Adjusted relationships using hierarchical multiple regression analyses indicated significant negative relationships between missed nursing care and nursing care reminders and perceptions of health information technology. The adjusted correlations support the hypotheses that there is a relationship between nursing care reminder usage and missed nursing care and a relationship between health information technology and missed nursing care. The relationships are negative, indicating that nurses who rate higher levels of reminder usage and health information technology have decreased reports of missed nursing care. The study found a significant relationship between nursing care reminders usage and decreased amounts of missed nursing care. The findings can be used in a variety of improvement endeavors, such as encouraging nurses to utilize nursing care reminders, aid information system designers when designing nursing care reminders, and assist healthcare organizations in assessing the impact of technology on nursing practice.

  2. Selective photocatalytic reduction of CO2 by H2O/H2 to CH4 and CH3OH over Cu-promoted In2O3/TiO2 nanocatalyst

    Science.gov (United States)

    Tahir, Muhammad; Tahir, Beenish; Saidina Amin, Nor Aishah; Alias, Hajar

    2016-12-01

    Photocatalytic CO2 reduction by H2O and/or H2 reductant to selective fuels over Cu-promoted In2O3/TiO2 photocatalyst has been investigated. The samples, prepared via a simple and direct sol-gel method, were characterized by XRD, SEM, TEM, XPS, N2 adsorption-desorption, UV-vis diffuse reflectance, Raman and PL spectroscopy. Cu and In loaded into TiO2, oxidized as Cu2+ and In3+, promoted efficient separation of photo-generated electron/hole pairs (e-/h+). The results indicate that the reduction rate of CO2 by H2O to CH4 approached to 181 μmol g-1 h-1 using 0.5% Cu-3% In2O3/TiO2 catalyst, a 1.53 fold higher than the production rate over the 3% In2O3/TiO2 and 5 times the amount produced over the pure TiO2. In addition, Cu was found to promote efficient production of CH3OH and yield rate reached to 68 μmol g-1 h-1 over 1% Cu-3% In2O3/TiO2 catalyst. This improvement was attributed to charge transfer property and suppressed recombination rate by Cu-metal. More importantly, H2 reductant was less favorable for CH4 production, yet a significant amount of CH4 and CH3OH were obtained using a mixture of H2O/H2 reductant. Therefore, Cu-loaded In2O3/TiO2 catalyst has shown to be capable for methanol production, whereas product selectivity was greatly depending on the amount of Cu-loading and the type of reductant. A photocatalytic reaction mechanism was proposed to understand the experimental results over the Cu-loaded In2O3/TiO2 catalyst.

  3. The effectiveness of computer reminders versus postal reminders for improving quality assessment for point-of-care testing in primary care

    DEFF Research Database (Denmark)

    Siersma, Volkert; Kousgaard, Marius Brostrøm; Reventlow, Susanne

    2015-01-01

    Rationale, aims and objectives: This study aimed to evaluate the relative effectiveness of electronic and postal reminders for increasing adherence to the quality assurance programme for the international normalized ratio (INR) point-of-care testing (POCT) device inprimary care. Methods: All 213...... family practices that use the Elective Laboratory of the Capital Region, Denmark, and regularly conduct INR POCT were randomly allocated into two similarly sized groups. During the 4-month intervention, these practices were sent either computer reminders (ComRem) or computer generated postal reminders....... Results: Both interventions were associated with an increase in adherence to the split test procedure – a factor 6.00 [95% confidence interval (CI) 4.46–7.72] and 8.22 [95% CI5.87–11.52] for ComRem and Postal, respectively – but there is no evidence that one of the interventions was more effective than...

  4. Appointment reminder systems are effective but not optimal: results of a systematic review and evidence synthesis employing realist principles.

    Science.gov (United States)

    McLean, Sionnadh Mairi; Booth, Andrew; Gee, Melanie; Salway, Sarah; Cobb, Mark; Bhanbhro, Sadiq; Nancarrow, Susan A

    2016-01-01

    Missed appointments are an avoidable cost and resource inefficiency which impact upon the health of the patient and treatment outcomes. Health care services are increasingly utilizing reminder systems to manage these negative effects. This study explores the effectiveness of reminder systems for promoting attendance, cancellations, and rescheduling of appointments across all health care settings and for particular patient groups and the contextual factors which indicate that reminders are being employed sub-optimally. We used three inter-related reviews of quantitative and qualitative evidence. Firstly, using pre-existing models and theories, we developed a conceptual framework to inform our understanding of the contexts and mechanisms which influence reminder effectiveness. Secondly, we performed a review following Centre for Reviews and Dissemination guidelines to investigate the effectiveness of different methods of reminding patients to attend health service appointments. Finally, to supplement the effectiveness information, we completed a review informed by realist principles to identify factors likely to influence non-attendance behaviors and the effectiveness of reminders. We found consistent evidence that all types of reminder systems are effective at improving appointment attendance across a range of health care settings and patient populations. Reminder systems may also increase cancellation and rescheduling of unwanted appointments. "Reminder plus", which provides additional information beyond the reminder function may be more effective than simple reminders (ie, date, time, place) at reducing non-attendance at appointments in particular circumstances. We identified six areas of inefficiency which indicate that reminder systems are being used sub-optimally. Unless otherwise indicated, all patients should receive a reminder to facilitate attendance at their health care appointment. The choice of reminder system should be tailored to the individual service

  5. Mitochondria-selective reduction of [sup 62]Cu-pyruvaldehyde bis(N[sup 4]-methylthiosemicarbazone)([sup 62]Cu-PTSM) in the murine brain; A novel radiopharmaceutical for brain positron emission tomography (PET) imaging

    Energy Technology Data Exchange (ETDEWEB)

    Fujibayashi, Yasuhisa; Wada, Kouichi; Taniuchi, Hideyuki; Yonekura, Yoshiharu; Konishi, Junji; Yokoyama, Akira (Kyoto Univ. (Japan). Faculty of Medicine)

    1993-02-01

    The retention mechanism of [sup 62]Cu-pyruvaldehyde bis(N[sup 4]-methylthiosemicarbazone)([sup 62]Cu-PTSM) in the murine brain was evaluated. For this purpose, stable Cu-PTSM was subjected to electron spin resonance spectrometry (ESR) and high performance liquid chromatography (HPLC) analysis to determine the valence state, coordination structure and tissue metabolism. In murine brain homogenate, ESR and HPLC analysis indicated the reduction and cleavage of Cu(II)-PTSM to Cu(I). This virtually irreversible reduction was specifically initiated by the mitochondrial enzymatic system in the murine brain. (author).

  6. Chelation of Cu(II, Zn(II, and Fe(II by Tannin Constituents of Selected Edible Nuts

    Directory of Open Access Journals (Sweden)

    Magdalena Karamać

    2009-12-01

    Full Text Available The tannin fractions isolated from hazelnuts, walnuts and almonds were characterised by colorimetric assays and by an SE-HPLC technique. The complexation of Cu(II and Zn(II was determined by the reaction with tetramethylmurexide, whereas for Fe(II, ferrozine was employed. The walnut tannins exhibited a significantly weaker reaction with the vanillin/HCl reagent than hazelnut and almond tannins, but the protein precipitation capacity of the walnut fraction was high. The SE-HPLC chromatogram of the tannin fraction from hazelnuts revealed the presence of oligomers with higher molecular weights compared to that of almonds. Copper ions were most effectively chelated by the constituents of the tannin fractions of hazelnuts, walnuts and almonds. At a 0.2 mg/assay addition level, the walnut tannins complexed almost 100% Cu(II. The Fe(II complexation capacities of the tannin fractions of walnuts and hazelnuts were weaker in comparison to that of the almond tannin fraction, which at a 2.5 mg/assay addition level, bound Fe(II by ~90%. The capacity to chelate Zn(II was quite varied for the different nut tannin fractions: almond tannins bound as much as 84% Zn(II, whereas the value for walnut tannins was only 8.7%; and for hazelnut tannins, no Zn(II chelation took place at the levels tested.

  7. Advance telephone calls ahead of reminder questionnaires increase response rate in non-responders compared to questionnaire reminders only: The RECORD phone trial.

    Science.gov (United States)

    MacLennan, Graeme; McDonald, Alison; McPherson, Gladys; Treweek, Shaun; Avenell, Alison

    2014-01-08

    Postal questionnaires are simple and economical for collecting outcome data for randomised controlled trials (RCTs) but are prone to non-response. In the RECORD trial (a large pragmatic publicly funded RCT in UK) non-responders were sent a reminder and another questionnaire at 1 year, of which 40% were returned. In subsequent years we investigated the effect of an advance telephone call to non-responders on responses rate to reminder questionnaires and the next questionnaire 4 months later. Non-responders to annual questionnaires were randomised to receive a telephone call from the trial office ahead of the reminder questionnaire in addition to the usual reminder schedule (n=390) or to a control group that received the usual reminder schedule only (n=363). The primary outcome was response to the reminder questionnaire within 21 days; secondary outcomes were response to a questionnaire 4 months later; completeness of quality of life instruments; and the number of participants declining further follow-up. Results are presented as odds ratios from a logistic regression intention-to-treat (ITT) analysis and then percentage difference and 95% confidence intervals (CI) for both ITT and average treatment effect on the treated (ATT) analyses. The proportions that responded were 67.8% (265/390) in the intervention group compared to 62.5% (227/363) in the control group. The ITT estimate was a 5.4% increase (95% CI -1.4 to 12.2). Four months later percentages responding were 51.8% (202) and 42.7% (155). The ITT estimate was a 9.1% increase (95% CI 2.0 to 16.2). In the intervention group 12.3% (48/390) of participants were not telephoned because questionnaires were returned before the scheduled telephone call. ATT estimates adjusting for this were 6.2% (95% CI -1.6 to 14.0) and 10.4% (95% CI 2.2 to 18.5), respectively. The telephone call resulted in a slight increase in response to the reminder questionnaire, however at 4 months later the proportion in the telephoned group

  8. Heterogenization of [Cu(2,2'-bpy)Cl2] and [Cu(1,10-phen)Cl2] on Polyoxometalates: New Catalysts for the Selective Oxidation of Tetralin%[Cu(2,2'-bpy)Cl2]和[Cu(1,10-phen)C12]在多金属氧酸盐上的多相化:选择性氧化四氢化萘的新催化剂

    Institute of Scientific and Technical Information of China (English)

    M. BOLTZ; A. BLANC; G. LAUGEL; P. PALE; B. LOUIS

    2011-01-01

    Mononuclear Cu(Ⅱ) bipyridine (1) and phenantroline complexes (2) were synthesized and immobilized by different procedures on H3PW12O40 polyoxometalate (POM). Characterization by XRD and SEM-EDX were performed to assess the preservation of the Keggin structure and stoichiometry of the complex. The immobilized complexes were tested as heterogeneous catalysts for the partial oxidation of tetralin (1,2,3,4-tetrahydronaphthalene) using hydrogen peroxide as oxidant in acetonitrile/water as solvent. [Cu(2,2'-bpy)C1][H2PW12O40] and [Cu(1,10-phen)Cl][H2PW12O40] oxidized tetralin at room temperature, with 16% conversion with (2), to 1-tetralone and 2-tetralone with 83% selectivity. However, the selectivity for 1-tetralone was only 56%. Different preparation methods for the heterogenization of these complexes on the POM Keggin unit were compared and used to enhance the selectivity to 1-tetralone to 75%.

  9. The effect of multiple reminders on response patterns in a Danish health survey

    DEFF Research Database (Denmark)

    Christensen, Anne I; Ekholm, Ola; Kristensen, Peter L;

    2015-01-01

    BACKGROUND: Reminders are routinely applied in surveys to increase response rates and reduce the possibility of bias. This study examines the effect of multiple reminders on the response rate, non-response bias, prevalence estimates and exposure-outcome relations in a national self......-administered health survey. METHODS: Data derive from the Danish National Health Survey 2010, in which 298 550 individuals (16 years of age or older) were invited to participate in a cross-sectional survey using a mixed-mode approach (paper and web questionnaires). At least two reminders were sent to non-respondents......, and 177 639 individuals completed the questionnaire (59.5%). Response patterns were compared between four groups of individuals (first mailing respondents, second mailing respondents, third mailing respondents and non-respondents). RESULTS: Multiple reminders led to an increase in response rate from 36...

  10. Augmenting short cheap talk scripts with a repeated opt-out reminder in choice experiment surveys

    DEFF Research Database (Denmark)

    Ladenburg, Jacob; Olsen, Søren Bøye

    reasons why Cheap Talk may fail to effectively remove hypothetical bias, especially in Choice Experiments. In this light, we suggest augmenting Cheap Talk in Choice Experiments with a so-called Opt-Out Reminder. Prior to each single choice set, the Opt-Out Reminder explicitly instructs respondents...... to choose the opt-out alternative if they find the experimentally designed alternatives too expensive. In an empirical Choice Experiment survey we find the Opt-Out Reminder to significantly reduce total WTP and to some extent also marginal WTP beyond the capability of the Cheap Talk applied without the Opt...... Talk with a dynamic Opt-Out Reminder can be an effective and promising improvement in the ongoing effort to remedy the particular types of hypothetical bias that potentially continue to invalidate Choice Experiment surveys....

  11. Persuasive texts for prompting action: Agency assignment in HPV vaccination reminders.

    Science.gov (United States)

    McGlone, Matthew S; Stephens, Keri K; Rodriguez, Serena A; Fernandez, Maria E

    2017-08-03

    Vaccination reminders must both inform and persuade, and text messages designed for this purpose must do so in 160 characters or less. We tested a strategy for improving the impact of HPV vaccination text message reminders through strategic wording. In an experiment conducted in community settings, 167 Spanish-speaking Latina mothers reviewed text message reminders that assigned the cause or "agency" for HPV transmission to their daughters or the virus, and assigned protection agency to the mothers or the vaccine. Reminder messages framing transmission as an action of the virus prompted mothers to perceive the threat as more severe than messages describing their daughters as the cause. Assigning transmission agency to the virus also held a persuasive advantage in boosting mothers' intentions to seek vaccination, particularly when the message cast mothers as agents of protection rather than the vaccine. Copyright © 2017 Elsevier Ltd. All rights reserved.

  12. Telephone reminders reduced the non-attendance rate in a gastroenterology outpatient clinic

    DEFF Research Database (Denmark)

    Jeppesen, Maja Haunstrup; Ainsworth, Mark Andrew

    2015-01-01

    in a gastroenterology outpatient clinic like ours. METHODS: This was a comparative intervention study with a historical control group in a gastroenterology outpatient clinic. The study lasted six months. Patients with a scheduled appointment in the first three-month period received no reminder (control group, n = 2......,705). Patients in the following three-month period were reminded by telephone one weekday in advance of their appointment, when possible (intervention group, n = 2,479). Non-attending patients in the intervention group received a questionnaire. Based on the results, a financial cost-benefit analysis was made......-attendees. The most common explanation for non-attendance in the intervention group was forgetfulness (39%). The reminder telephone call was cost-effective. CONCLUSION: In this outpatient clinic, telephone reminders were cost-effective and significantly reduced the non-attendance rate by 43%....

  13. Impact of second reminder invitation on uptake of screening and cancer detection in BreastCheck.

    LENUS (Irish Health Repository)

    Fleming, P

    2012-01-01

    This research aims to quantify the impact of reminder invitations on uptake and cancer detection in Ireland. Examination of BreastCheck\\'s clinical database (2000-2010) to determine number of women screened following first invitation and after reminder; comparison by age group and screening phase with outcomes of recall rate, cancer detection and true positive rates. Of 819,182 first invitations sent 448,974 (54.8%) women attended. 245,157 (66.2%) women attended after reminder invitations, increasing uptake by 29.9% to 694,131 (84.7%) and cancers detected by 1,550 (35%). Women awaiting a reminder were less likely recalled for assessment 9,555 (3.9%) than respondents to first invitation 2,887 (4.04%) (p=0.004). Younger, mainly initial women were more likely recalled for assessment after first invitation. There was no difference between cohorts for cancer detection rate or true positive rate. Reminders increased uptake, supporting international evidence. For programme efficiency attendance at first invitation is optimal. For maximum programme effectiveness attendance must be encouraged with reminders.

  14. Effect of drug reminder packaging on medication adherence: a systematic review revealing research gaps.

    Science.gov (United States)

    Boeni, Fabienne; Spinatsch, Esther; Suter, Katja; Hersberger, Kurt E; Arnet, Isabelle

    2014-03-24

    This was a systematic review of the literature in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) statement. Evidence mapping was used to reveal the effect of drug reminder packaging on medication adherence, to identify research gaps and to make suggestions for future research. PubMed, Embase, CINAHL and PsycINFO were searched with an end date of September 2013 using the Medical Subject Headings (MeSH) term 'medication adherence' and 20 different search terms for 'drug reminder packaging', limited to the English and German languages. Additional references were identified through cross-referencing. All prospective controlled trials with an intervention using drug reminder packaging for patients taking at least one medication without the assistance of a health-care professional were included in the evidence mapping of the effect of drug reminder packaging on adherence and outcomes according to the Economic, Clinical and Humanistic Outcomes (ECHO) model. A total of 30 studies met the inclusion criteria: 10 randomized controlled trials, 19 controlled clinical trials and 1 cohort study. Drug reminder packaging had a significant effect on at least one adherence parameter in 17 studies (57%). The methodological quality was strong in five studies. Two studies provided complete information. Clear research gaps emerged. Overall, the studies showed a positive effect of drug reminder packaging on adherence and clinical outcomes. However, poor reporting and important gaps like missing humanistic and economic outcomes and neglected safety issues limit the drawing of firm conclusions. Suggestions are made for future research.

  15. Theoretical analysis of polariton interference in a thin platelet of CuCl. II - Effect of selective pumping

    Science.gov (United States)

    Cho, K.

    1985-11-01

    Pumping effect on the polariton dynamics in a thin platelet of CuCl has been theoretically analyzed from the viewpoint of nonlinear change in polariton dispersion relation. In terms of (1) the dielectric function of Haug et al. (1980), which includes the effect of pumping excitons into excitonic molecule states, and (2) an extended form of the Pekar's (1958) additional boundary condition, the observed pumping spectra by Mita and Nagasawa (1982) for a very thin platelet, which show a characteristic dependence on the (fixed) probe light frequency are well reproduced. Application of the theory to thicker samples, where a puzzling, pump-induced correlation effect is observed between upper and lower polaritons, shows that the consideration of the nonlinear change in polariton dispersion is not enough to solve the puzzle.

  16. Preparation of Cu/TiO2 - SiO2 catalysts and research on activity for selective hydrogenation of furfural%Cu/TiO2-SiO2催化剂的制备及糠醛选择加氢活性研究

    Institute of Scientific and Technical Information of China (English)

    宋华; 宋腱森; 李锋

    2012-01-01

    The Cu/TiO2 - SiO2 catalysts are prepared by sol-gel hydrothermal method and characterized by XRD and BET. The effect of support composition and Cu content on activity of selective hydrogenation is evaluated by the reaction of furfural selective hydrogenation to furfuralcohol. The results show that TiO2 which appropriately added to support can inhibit the increase of Cu crystallite size,and improve the dispersing of the Cu nanoparticles on the catalysts. The Cu/TiO2 - SiO2 catalyst exhibit higher activity for selective hydrogenation of furfural when TiO2 mass fraction is 40% in support and Cu mass fraction is 20%.%采用溶胶凝胶-水热法制备Cu/TiO2 - SiO2催化剂,并运用XRD、BET对催化剂进行表征,以糠醛选择加氢制糠醇反应为探针,考察载体组成及Cu含量对催化剂活性的影响.结果表明,载体中引入适量的TiO2能够抑制Cu晶粒的增长,改善Cu粒子在催化剂中的分散性.载体中TiO2质量分数40%,Cu负载量(质量分数)20%时,制备的Cu/TiO2 - SiO2催化剂具有较好的催化活性.

  17. Low-temperature selective catalytic reduction of NO on CeO2-CuO/Al2O3 catalysts prepared by different methods.

    Science.gov (United States)

    Guo, Rui-Tang; Zhen, Wen-Long; Pan, Wei-Guo; Hong, Jie-Nan; Jin, Qiang; Ding, Cheng-Gang; Guo, Shi-Yi

    2014-08-01

    CeO2-CuO/Al2O3 catalysts were prepared by three different methods and their activities for selective catalytic reduction (SCR) of NO with NH3 were investigated. As can be seen from the experimental results, the catalyst prepared by the single-step sol-gel (SG) method showed the best SCR activity and resistance to SO2 and H2O. In order to investigate the relationship between the preparation method and the performance of SCR catalysts, the catalysts were characterized by using Brunauer-Emmett-Teller, X-ray diffraction, temperature programmed reduction with hydrogen, temperature programmed desorption with ammonia, X-ray photoelectron spectroscopy, Fourier transform infrared and thermo-gravimetric analysis techniques. It was found that the excellent performance of CeO2-CuO/Al2O3 catalyst prepared by the single-step SG method should be resulted from its large surface area, low crystallinity, high oxygen storage capacity, high NH3 adsorption capacity, high concentration of surface chemisorbed oxygen, weak sulphation process and weak water absorption.

  18. Real time medication monitoring with customized SMS reminders for people with refractory epilepsy : will medication adherence levels improve when patients receive customized SMS reminders?

    NARCIS (Netherlands)

    Hettinga, Marike; Gussinklo, Jan Taco te; Gutter, Thea

    2013-01-01

    A high level of medication adherence is important for people with refractory epilepsy. For most people, however, it is difficult to have their medication intakes as prescribed every day. In this study we investigated if Real Time Medication Monitoring (RTMM) with customized SMS-reminding had an effe

  19. [b][/b]Impact of copper (Cu at the dose of 50 mg on haematological and biochemical blood parameters in turkeys, and level of Cu accumulation in the selected tissues as a source of information on product safety for consumers

    Directory of Open Access Journals (Sweden)

    Bogusław Makarski

    2014-09-01

    Full Text Available Introduction. The current state-of the art points to a positive impact of copper (Cu supplements on the general health status in poultry. Copper induces beneficial changes in the haematological and biochemical blood parameters. It also displays immunostimulating properties and helps maintain a proper microbiological balance in the digestive tract. [b]Objective[/b]. The objective of this study was to investigate the impact of Cu at the dose of 50 mg/kg BW, administered in organic and inorganic form, on the haematological and biochemical blood parameters and level of Cu bioaccumulation in the liver and pectoral muscle. [b]Materials and method[/b]. The study was carried out on 45 BUT-9 turkeys which had been were reared for 16 weeks. They were divided into 3 experimental groups: I – the control group; II – fed with CuSO[sub]4[/sub] at the dose of 50 mg Cu•dm [sup]-3 [/sup]H[sub]2[/sub]O; III – received a Cu chelate with lysine at the same dose. [b]Results[/b]. The administration of Cu at the dose exceeding the nutritional recommendations did not induce beneficial changes in the examined birds. This indicates that it is not necessary to administer Cu doses higher than the recommended levels. The extent of Cu accumulation in the pectoral muscle increased by 40% compared to the control group, whereas in the liver it was higher by 30–35% than in the birds without Cu administration. The level of Cu in tissues does not pose a risk to consumers. [b]Conclusions[/b]. The supplementation of Cu at the dose of 50 mg has a negative impact on the level of the analyzed parameters. The results of the presented study indicate that the administered Cu dose exceeds birds’ demand for this element.

  20. A chemosensor showing discriminating fluorescent response for highly selective and nanomolar detection of Cu²⁺ and Zn²⁺ and its application in molecular logic gate.

    Science.gov (United States)

    Fegade, Umesh A; Sahoo, Suban K; Singh, Amanpreet; Singh, Narinder; Attarde, Sanjay B; Kuwar, Anil S

    2015-05-04

    A fluorescent based receptor (4Z)-4-(4-diethylamino)-2-hydroxybenzylidene amino)-1,2dihydro-1,5-dimethyl-2-phenylpyrazol-3-one (receptor 3) was developed for the highly selective and sensitive detection of Cu(2+) and Zn(2+) in semi-aqueous system. The fluorescence of receptor 3 was enhanced and quenched, respectively, with the addition of Zn(2+) and Cu(2+) ions over other surveyed cations. The receptor formed host-guest complexes in 1:1 stoichiometry with the detection limit of 5 nM and 15 nM for Cu(2+) and Zn(2+) ions, respectively. Further, we have effectively utilized the two metal ions (Cu(2+) and Zn(2+)) as chemical inputs for the manufacture of INHIBIT type logic gate at molecular level using the fluorescence responses of receptor 3 at 450 nm. Copyright © 2015 Elsevier B.V. All rights reserved.

  1. Application of silica-supported Fe-Cu nanoparticles in the selective hydrogenation of p-dinitrobenzene to p-phenylenediamine

    Science.gov (United States)

    Shesterkina, A. A.; Shuvalova, E. V.; Kirichenko, O. A.; Strelkova, A. A.; Nissenbaum, V. D.; Kapustin, G. I.; Kustov, L. M.

    2017-02-01

    Supported bimetallic Fe-Cu/SiO2 materials are synthesized, and their catalytic activity in hydrogenation of dinitrobenzene to phenylenediamine at 145-180°C and 1.3 MPa hydrogen pressure is studied for the first time. The best results (89% selectivity toward p-phenylenediamine at complete conversion of p-dinitrobenzene) are obtained for the sample synthesized via co-deposition with subsequent calcination at 300°C. The sample contains 7% iron and 3% copper. The formation of separate phases of metal oxides (for the catalysts prepared by impregnation) and mixed bimetallic oxide phases (in case of co-deposition procedure) in calcined samples is revealed via thermoprogrammed reduction with hydrogen.

  2. Fast, selective adsorption of Cu2+ from aqueous mixed metal ions solution using 1,4,7-triazacyclononane modified SBA-15 silica adsorbent (SBA-TACN)

    Science.gov (United States)

    Tapaswi, Pradip Kumar; Moorthy, Madhappan Santha; Park, Sung Soo; Ha, Chang-Sik

    2014-03-01

    A new SBA-15 supported 1,4,7-triazacyclononane modified mesoporous silica adsorbent (SBA-TACN) has been synthesized using post grafting route and has thoroughly been characterized by small angle X-ray scattering (SAXS), N2 adsorption-desorption measurements, Fourier-transform infrared (FT-IR), solid-state 29Si MAS and 13C CP MAS NMR spectroscopy, transmission electron (TEM) and scanning electron microscopy (SEM), elemental analysis (EA) and thermogravimetric analysis (TGA). The synthesized material shows excellent copper (II) ion adsorption selectivity at pH 5 in mixed metal ion solution containing Cu2+, Cr3+, Ni2+, Co2+ and Li+. The copper ion adsorption capacity of the SBA-TACN can reach a maximum value of 0.67 mmol/g. Possible adsorption mechanism of metal ions on SBA-TACN has been discussed. The adsorbent can be readily regenerated by HNO3-NH3 treatment.

  3. Selective oxidation of vinyl chloride on Ag2O(100), Cu2O(100), and Au2O(100) surfaces: A density functional theory study

    Science.gov (United States)

    Ren, Rui-Peng; Cheng, Lu; Lv, Yong-Kang

    2014-12-01

    Vinyl chloride (VC) is the simplest asymmetric olefin molecule and is greatly harmful to the environment and human health. To find an effective oxidation approach to decrease VC emission, the selective oxidation reaction of the VC molecule on Ag2O(100), Cu2O(100), and Au2O(100) surfaces has been investigated by using density functional theory in the present work. Five different reaction pathways in two steps on the three surfaces have been proposed and discussed. The result shows that the formation of chloroacetadehyde is more favored than the formation of chloroethylene epoxide and acetyl chloride, and the activation energy of chloroacetadehyde formation on the Ag2O(100) surface is lower than that on the other two surfaces.

  4. Cu-pyruvaldehyde-bis(N{sup 4}-methylthiosemicarbazone)(Cu-PTSM), a metal complex with selective NADH-dependent reduction by complex I in brain mitochondria. A potential radiopharmaceutical for mitochondria-functional imaging with positron emission tomography

    Energy Technology Data Exchange (ETDEWEB)

    Taniuchi, Hideyuki; Fujibayashi, Yasuhisa; Yokoyama, Akira [Kyoto Univ. (Japan). Faculty of Pharmaceutical Science; Okazawa, Hidehiko; Yonekura, Yoshiharu; Konishi, Junji

    1995-08-01

    The reductive retention mechanism of copper(II)-Pyruvaldehyde-bis (N{sup 4}-methylthiosemicarbazone) (Cu-PTSM), a generator-produced positron-emitting {sup 62}Cu-labeled radiopharmaceutical, was studied with non-radioactive and radioactive copper. Changes in the chemical form of Cu-PTSM were detected by electron spin resonance spectrometry (ESR) with cold copper. The effects of electron transport chain inhibitors on the reduction of Cu-PTSM were also examined. Rotenone and antimycin A activated the reduction of Cu-PTSM in the brain mitochondria by 1.6 and 1.4-fold, respectively, compared with untreated controls, while thenoyltrifluoroacetone (TTFA) had no effect on the reduction. These results were confirmed with radioactive copper. Furthermore, this reduction of Cu-PTSM was dependent on the protein concentration of mouse brain submitochondrial particle (SMP) with 1 mM NADH2.S%, 8mg-protein/ml: 69.0{+-}5.5%, each value was % of reduced Cu. Similarly, this reduction depended on NADH concentration at a fixed concentration of SMP (8mg-protein/ml). These results indicated that the electron transport chain, especially complex I, participate in the reduction mitochondria, and this suggested that Cu-PTSM has the potential to act as a functional imaging agent for diagnosis of the electron transport chain. (author).

  5. The hippocampus is required for visually cued contextual response selection, but not for visual discrimination of contexts

    Directory of Open Access Journals (Sweden)

    Sehee eKim

    2012-09-01

    Full Text Available The hippocampus is important for spatial navigation. Literature shows that allocentric visual contexts in the animal's background are critical for making conditional response selections during navigations. In a traditional maze task, however, it is difficult to identify exactly which subsets of visual contexts are critically used. In the current study, we tested in rats whether making conditional response selections required the hippocampus when using computer-generated visual contextual stimuli in the animal's background as in primate and human studies. We designed a new task, visual contextual response selection (VCRS task, in which the rat ran along a linear track and encountered a touchscreen monitor at the end of the track. The rat was required to touch one of the adjacent rectangular box images depending on the visual contextual stimuli displayed in the two peripheral monitors positioned on both sides of the center touchscreen monitor. The rats with a GABA-A receptor agonist, muscimol (MUS, infused bilaterally in the dorsal hippocampi showed severe performance deficits in the VCRS task and the impairment was completely reversible with vehicle injections. The impairment in contextual response selection with hippocampal inactivations occurred regardless of whether the visual context was presented in the side monitors or in the center touchscreen monitor. However, when the same visual contextual stimuli were pitted against each other between the two side monitors and as the rats simply ran toward the visual context associated with reward on a T-shaped track, hippocampal inactivations with MUS showed minimal disruptions, if any, in performance. Our results suggest that the hippocampus is critically involved in conditional response selection using visual stimuli in the background, but it is not required for the perceptual discrimination of those stimuli.

  6. The hippocampus is required for visually cued contextual response selection, but not for visual discrimination of contexts

    Science.gov (United States)

    Kim, Sehee; Lee, Jihyun; Lee, Inah

    2012-01-01

    The hippocampus is important for spatial navigation. Literature shows that allocentric visual contexts in the animal's background are critical for making conditional response selections during navigations. In a traditional maze task, however, it is difficult to identify exactly which subsets of visual contexts are critically used. In the current study, we tested in rats whether making conditional response selections required the hippocampus when using computer-generated visual contextual stimuli in the animal's background as in primate and human studies. We designed a new task, visual contextual response selection (VCRS) task, in which the rat ran along a linear track and encountered a touchscreen monitor at the end of the track. The rat was required to touch one of the adjacent rectangular box images depending on the visual contextual stimuli displayed in the two peripheral monitors positioned on both sides of the center touchscreen monitor. The rats with a GABA-A receptor agonist, muscimol (MUS), infused bilaterally in the dorsal hippocampi showed severe performance deficits in the VCRS task and the impairment was completely reversible with vehicle injections. The impairment in contextual response selection with hippocampal inactivations occurred regardless of whether the visual context was presented in the side monitors or in the center touchscreen monitor. However, when the same visual contextual stimuli were pitted against each other between the two side monitors and as the rats simply ran toward the visual context associated with reward on a T-shaped track, hippocampal inactivations with MUS showed minimal disruptions, if any, in performance. Our results suggest that the hippocampus is critically involved in conditional response selection using visual stimuli in the background, but it is not required for the perceptual discrimination of those stimuli. PMID:23060765

  7. User engagement with and attitudes towards an interactive SMS reminder system for patients with tuberculosis.

    Science.gov (United States)

    Mohammed, Shama; Siddiqi, Osman; Ali, Owais; Habib, Ali; Haqqi, Faraz; Kausar, Maimoona; Khan, Aamir J

    2012-10-01

    We conducted a qualitative study to understand user perceptions, acceptability and engagement with an interactive SMS reminder system designed to improve treatment adherence for patients with tuberculosis (TB). Patients received daily reminders and were asked to respond after taking their medication. Non-responsive patients were sent up to three reminders a day. We enrolled 30 patients with TB who had access to a mobile phone and observed their engagement with the system for a one-month period. We also conducted semi-structured interviews with 24 patients to understand their experience with the system. Most patients found the reminders helpful and encouraging. The average response rate over the study period was 57%. However, it fell from a mean response rate of 62% during the first ten days to 49% during the last ten days. Response rates were higher amongst females, participants with some schooling, and participants who had sent an SMS message the week prior to enrolment. Non-responsiveness was associated with a lack of access to the owner of the mobile phone, problems with the mobile phone itself and literacy. Our pilot study suggests that interactive SMS reminders are an acceptable and appreciated method of supporting patients with TB in taking their medication.

  8. Using Text Reminder to Improve Childhood Immunization Adherence in the Philippines.

    Science.gov (United States)

    Garcia-Dia, Mary Joy; Fitzpatrick, Joyce J; Madigan, Elizabeth A; Peabody, John W

    2016-11-08

    A comparative descriptive study was conducted to determine the effectiveness of text messages with pictures compared with plain text messages or verbal reminders in improving measles, mumps, and rubella immunization compliance in the rural areas of the Philippines. We found that text messaging with or without pictures is a feasible and useful tool in measles, mumps, rubella immunization compliance for childhood immunization. Texting with pictures (n = 23), however, was no more effective than plain text messaging (n = 19) or verbal reminder (n = 17) in improving measles, mumps, and rubella immunization compliance. Compared with parents who received verbal reminders alone, either type of text reminders was linked to parents bringing their child for measles, mumps, and rubella immunization on a timelier basis, as defined by the difference between the scheduled visit and the actual visit, although this was not statistically significant. Mobile technology that uses text reminders for immunization can potentially improve the communication process between parent, the public health nurse, and healthcare provider. Future studies can explore the application of plain text messages or text messages with pictures to improve compliance more broadly for maternal and child healthcare especially in rural areas of developing countries and may be a helpful tool for health promotion for this population.

  9. Redesign of a computerized clinical reminder for colorectal cancer screening: a human-computer interaction evaluation

    Directory of Open Access Journals (Sweden)

    Saleem Jason J

    2011-11-01

    Full Text Available Abstract Background Based on barriers to the use of computerized clinical decision support (CDS learned in an earlier field study, we prototyped design enhancements to the Veterans Health Administration's (VHA's colorectal cancer (CRC screening clinical reminder to compare against the VHA's current CRC reminder. Methods In a controlled simulation experiment, 12 primary care providers (PCPs used prototypes of the current and redesigned CRC screening reminder in a within-subject comparison. Quantitative measurements were based on a usability survey, workload assessment instrument, and workflow integration survey. We also collected qualitative data on both designs. Results Design enhancements to the VHA's existing CRC screening clinical reminder positively impacted aspects of usability and workflow integration but not workload. The qualitative analysis revealed broad support across participants for the design enhancements with specific suggestions for improving the reminder further. Conclusions This study demonstrates the value of a human-computer interaction evaluation in informing the redesign of information tools to foster uptake, integration into workflow, and use in clinical practice.

  10. Text4Health: impact of text message reminder-recalls for pediatric and adolescent immunizations.

    Science.gov (United States)

    Stockwell, Melissa S; Kharbanda, Elyse Olshen; Martinez, Raquel Andres; Lara, Marcos; Vawdrey, David; Natarajan, Karthik; Rickert, Vaughn I

    2012-02-01

    We conducted 2 studies to determine the impact of text message immunization reminder-recalls in an urban, low-income population. In 1 study, text message immunization reminders were sent to a random sample of parents (n = 195) whose children aged 11 to 18 years needed either or both meningococcal (MCV4) and tetanus-diphtheria-acellular pertussis (Tdap) immunizations. We compared receipt of MCV4 or Tdap at 4, 12, and 24 weeks with age- and gender-matched controls. In the other study, we compared attendance at a postshortage Haemophilus influenzae B (Hib) immunization recall session between parents who received text message and paper-mailed reminders (n = 87) and those who only received paper-mailed reminders (n = 87). Significantly more adolescents with intervention parents received either or both MCV4 and Tdap at weeks 4 (15.4% vs 4.2%; P text messaging was still significantly associated with both studies' outcomes. Text messaging for reminder-recalls improved immunization coverage in a low-income, urban population.

  11. Design, synthesis, characterization and cation sensing behavior of amino-naphthoquinone receptor: Selective colorimetric sensing of Cu(II) ion in nearly aqueous solution with mimicking logic gate operation

    Science.gov (United States)

    Parthiban, C.; Elango, Kuppanagounder P.

    2017-03-01

    An amino-naphthoquione receptor (R1) has been rationally designed, synthesized and characterized using 1H and 13C NMR, LCMS and single crystal X-ray diffraction studies. The receptor exhibits an instantaneous colour change from yellow to blue selectively with Cu(II) ions in water-DMF (98:2% v/v) medium. The results of UV-Vis and fluorescence spectral studies indicates that the mechanism of sensing involves formation of a 1:1 complex between R1 and Cu(II) ion. The proposed mechanism has been confirmed through product analysis using FT-IR, UV-Vis, EPR and HRMS studies in addition to magnetic moment and elemental analysis measurements. The formed [Cu(R1)Cl2] possess a square planar geometry. The binding constant for the interaction of Cu(II) ion with the present unsubstituted quinone is found to be relatively higher than that with quinones containing electron withdrawing chlorine atom and electron releasing methyl group reported in literature. The detection limit of Cu(II) ion in aqueous solution by R1 is observed to be 8.7 nM. The detection of Cu(II) ion by R1 in aqueous solution produces remarkable changes in the electronic and fluorescence spectra, which is applied to construct logic gate at molecular level.

  12. LoCuSS: Exploring the selection of faint blue background galaxies for cluster weak-lensing

    CERN Document Server

    Ziparo, Felicia; Okabe, Nobuhiro; Haines, Chris P; Pereira, Maria J; Egami, Eiichi

    2015-01-01

    Cosmological constraints from galaxy clusters rely on accurate measurements of the mass and internal structure of clusters. An important source of systematic uncertainty in cluster mass and structure measurements is the secure selection of background galaxies that are gravitationally lensed by clusters. This issue has been shown to be particular severe for faint blue galaxies. We therefore explore the selection of faint blue background galaxies, by reference to photometric redshift catalogs derived from the COSMOS survey and our own observations of massive galaxy clusters at z~0.2. We show that methods relying on photometric redshifts of galaxies in/behind clusters based on observations through five filters, and on deep 30-band COSMOS photometric redshifts are both inadequate to identify safely faint blue background galaxies. This is due to the small number of filters used by the former, and absence of massive galaxy clusters at redshifts of interest in the latter. We therefore develop a pragmatic method to c...

  13. Selective increase of auditory cortico-striatal coherence during auditory-cued Go/NoGo discrimination learning.

    Directory of Open Access Journals (Sweden)

    Andreas L. Schulz

    2016-01-01

    Full Text Available Goal directed behavior and associated learning processes are tightly linked to neuronal activity in the ventral striatum. Mechanisms that integrate task relevant sensory information into striatal processing during decision making and learning are implicitly assumed in current reinforcementmodels, yet they are still weakly understood. To identify the functional activation of cortico-striatal subpopulations of connections during auditory discrimination learning, we trained Mongolian gerbils in a two-way active avoidance task in a shuttlebox to discriminate between falling and rising frequency modulated tones with identical spectral properties. We assessed functional coupling by analyzing the field-field coherence between the auditory cortex and the ventral striatum of animals performing the task. During the course of training, we observed a selective increase of functionalcoupling during Go-stimulus presentations. These results suggest that the auditory cortex functionally interacts with the ventral striatum during auditory learning and that the strengthening of these functional connections is selectively goal-directed.

  14. Patient preferences and access to text messaging for health care reminders in a safety-net setting.

    Science.gov (United States)

    Zallman, Leah; Bearse, Adriana; West, Catherine; Bor, David; McCormick, Danny

    2017-01-01

    Text messaging may be an effective method for providing health care reminders to patients. We aimed to understand patient access to and preferences for receiving health-related reminders via text message among patients receiving care in safety-net hospitals. We conducted face-to-face surveys with 793 patients seeking care in three hospital emergency departments at a large safety-net institution and determined clinical and demographic predictors of preferences for text messaging for health care reminders. 95% of respondents reported having daily access to text messaging. Text messaging was preferred over e-mail, phone, and letters for communication. 78% of respondents wanted to receive appointment reminders, 56% wanted expiring insurance reminders, and 36% wanted reminders to take their medications. We found no clinical predictors but did find some demographic predictors-including age, ethnicity, insurance status, and income-of wanting text message reminders. In our convenience sample of safety-net patients, text messaging is an accessible, acceptable, and patient-preferred modality for receiving health care reminders. Text messaging may be a promising patient-centered approach for providing health care and insurance reminders to patients seeking care at safety-net institutions.

  15. Smartphone technology: Gentle reminders of everyday tasks for those with prospective memory difficulties post-brain injury.

    Science.gov (United States)

    Ferguson, Scott; Friedland, Daniel; Woodberry, Emma

    2015-01-01

    Prospective memory is a common deficit following brain injury that can reduce an individuals' ability to complete everyday tasks. The smartphone is a device that may compensate for these difficulties using the calendar's prompting function. Reminders can be programmed remotely using email to phone synchronization. To explore whether smartphone reminders help people complete pre-identified tasks as compared to when reminders are not provided. An ABAB case series design compared reminder present vs. reminder absent phases with regards completion of pre-set tasks. Six participants aged 24-55 with Acquired Brain Injury (ABI) and five caregivers participated in the study. Both completed a series of questionnaires looking at the impact of the smartphone reminders on everyday memory functioning at pre, post and follow-up. A 3-month follow-up questionnaire assessed continued use of the system. There was a significant improvement in task completion rates when smartphone reminders were provided. A thematic analysis identified that smartphone reminders improved independence, confidence in coping with memory difficulties and general mood. All participants were still using the system at 3-month follow-up. Smartphone reminders may provide a cost-effective, accessible and non-stigmatizing tool for participants to compensate for prospective memory difficulties.

  16. The impact of an electronic monitoring and reminder device on patient compliance with antihypertensive therapy

    DEFF Research Database (Denmark)

    Christensen, Arne; Christrup, Lona Louring; Fabricius, Paul Erik;

    2010-01-01

    BACKGROUND: High blood pressure (BP) significantly increases overall cardiovascular risk, the incidence of ischemic heart disease and stroke. One of the most important causes of insufficient BP control is low treatment compliance. Reminders and electronic compliance monitoring have been shown...... to be effective in improving patient compliance to some extent, but the combined effect has not been documented. OBJECTIVE: To assess the impact of an electronic reminder and monitoring device on patient compliance and BP control. METHODS: All patients received medical treatment with telmisartan once daily...... group 1, and between 32 and 38% in study group 2. CONCLUSION: The Helping Hand reminder device was most suitable if used for newly diagnosed hypertensive patients, when it improved compliance by 6%. With the present medical treatment, the device does not have any influence on BP control, but with less...

  17. Augmenting short cheap talk scripts with a repeated opt-out reminder in choice experiment surveys

    DEFF Research Database (Denmark)

    Ladenburg, Jacob; Olsen, Søren Bøye

    reasons why Cheap Talk may fail to effectively remove hypothetical bias, especially in Choice Experiments. In this light, we suggest augmenting Cheap Talk in Choice Experiments with a so-called Opt-Out Reminder. Prior to each single choice set, the Opt-Out Reminder explicitly instructs respondents...... Talk with a dynamic Opt-Out Reminder can be an effective and promising improvement in the ongoing effort to remedy the particular types of hypothetical bias that potentially continue to invalidate Choice Experiment surveys.......Hypothetical bias remains a major problem when valuing non-market goods with stated preference methods. Originally developed for Contingent Valuation studies, Cheap Talk has been found to effectively reduce hypothetical bias in some applications, though empirical results are ambiguous. We discuss...

  18. Anticipating divine protection? Reminders of god can increase nonmoral risk taking.

    Science.gov (United States)

    Kupor, Daniella M; Laurin, Kristin; Levav, Jonathan

    2015-04-01

    Religiosity and participation in religious activities have been linked with decreased risky behavior. In the current research, we hypothesized that exposure to the concept of God can actually increase people's willingness to engage in certain types of risks. Across seven studies, reminders of God increased risk taking in nonmoral domains. This effect was mediated by the perceived danger of a risky option and emerged more strongly among individuals who perceive God as a reliable source of safety and protection than among those who do not. Moreover, in an eighth study, when participants were first reminded of God and then took a risk that produced negative consequences (i.e., when divine protection failed to materialize), participants reported feeling more negatively toward God than did participants in the same situation who were not first reminded of God. This research contributes to an understanding of the divergent effects that distinct components of religion can exert on behavior.

  19. Meta-analysis on the effect of text message reminders for HIV-related compliance.

    Science.gov (United States)

    Mayer, Jonathan E; Fontelo, Paul

    2017-04-01

    For the treatment of HIV, compliance in regard to appointment attendance and medication usage is critical. Various methods have been attempted to increased HIV care compliance, and a method that has inspired many published studies is text message reminders. We conducted a meta-analysis of the literature from inception through May 2016 using the following databases: Pubmed, Embase, CINAHL, Web of Science, and Cochrane. Examples of terms used in the search included exploded versions of "HIV, "AIDS", "cell phone", "SMS", "text message", "reminder". After abstract and manuscript review, articles were discussed with co-author and included based on consensus. We excluded qualitative analyses, observational studies without an intervention, and studies without a control or pre-intervention group. We used random-effects models to calculate odds ratios (OR) and standardized mean differences (SMDs) for the text message intervention. Thirty-four unique studies were found and included in the meta-analysis. For the seven articles relating to non-attendance, text message reminders significantly reduced the rates of non-attendance (OR, 0.66; 95% CI, 0.48-0.92; P = .01; I(2) = 52%). For the 20 articles on drug adherence, text message reminders significantly increased adherence (SMD, 0.87; 95% CI, 0.06-1.68; P = .04; I(2) = 99%). For the 11 articles with physiologic measures (CD4 count or viral load), text message reminders led to significant improvement (SMD, 1.53; 95% CI, 0.52-2.55; P = .003; I(2) = 99%). This meta-analysis reveals that text message reminders are a promising intervention that can be used to increase HIV care compliance when logistically feasible. Further study should focus on which populations benefit the most from this intervention, and successful implementers could create an established technological infrastructure for other clinics to adopt when seeking to boost compliance.

  20. LoCuSS: Exploring the selection of faint blue background galaxies for cluster weak-lensing

    Science.gov (United States)

    Ziparo, Felicia; Smith, Graham P.; Okabe, Nobuhiro; Haines, Chris P.; Pereira, Maria J.; Egami, Eiichi

    2016-10-01

    Cosmological constraints from galaxy clusters rely on accurate measurements of the mass and internal structure of clusters. An important source of systematic uncertainty in cluster mass and structure measurements is the secure selection of background galaxies that are gravitationally lensed by clusters. This issue has been shown to be particular severe for faint blue galaxies. We therefore explore the selection of faint blue background galaxies, by reference to photometric redshift catalogues derived from the COSMOS survey and our own observations of massive galaxy clusters at z ≃ 0.2. We show that methods relying on photometric redshifts of galaxies in/behind clusters based on observations through five filters, and on deep 30-band COSMOS photometric redshifts are both inadequate to safely identify faint blue background galaxies with the same 1 per cent contamination level that we have achieved with red galaxies. This is due to the small number of filters used by the former, and absence of massive galaxy clusters at redshifts of interest in the latter. Nevertheless, our least contaminated blue galaxy sample yields stacked weak-lensing results consistent with our previously published results based on red galaxies, and we show that the stacked clustercentric number density profile of these faint blue galaxies is consistent with expectations from consideration of the lens magnification signal of the clusters. Indeed, the observed number density of blue background galaxies changes by ˜10 - 30 per cent across the radial range over which other surveys assume it to be flat.

  1. The effect of dietary Cu and diabetes on indices of Cu nutriture in the rat

    Energy Technology Data Exchange (ETDEWEB)

    Rucker, R.B.; Uriu-Hare, J.Y.; Tinker, D.; Keen, C.L. (Univ. of California, Davis (United States))

    1991-03-11

    The uptake-retention of 67Cu is affected by dietary Cu and diabetes. Consequently, the functional activities of select enzymes and tissue Cu status were assessed. STZ-diabetic and control rats were fed Cu suppl. or def. diets. Rats were gavaged with 28 {mu}Ci 67Cu, and killed 8, 16, 24, 32, 64, or 128 h later. Diabetic rats were hyperphagic, hyperglycemic and hypoinsulinemic; with no effect of diet. Plasma ceruloplasmin activity (Cp) was lower in Cu def. rats; diabetic rats tended to have higher Cp than controls. Cu def. rats had low Cu levels in liver, kidney and plasma. Cu suppl. diabetic rats had higher liver and kidney Cu compared to Cu def. diabetic rats. Gel chromatography of liver showed that with time, there was a transfer of 67Cu from low to higher MW ligands. In nondiabetic rats, more 67Cu was associated with the higher MW ligands. The converse was observed for diabetic rats. There was no effect of diabetes on liver 67Cu localization. Diabetic rats had higher metallothionein (MT) concentrations in liver and kidney compared to controls Cu deficiency lowered MT values in both diabetic and control rats. CuZn SOD Cu activity was lowered with Cu def. and diabetes, while Mn SOD activity was similar among groups. Plasma lipid peroxide levels were lower in diabetic rats than controls. The results show that Cu metabolism is affected in diabetes, and the changes are functionally significant.

  2. Appointment reminder systems are effective but not optimal: results of a systematic review and evidence synthesis employing realist principles

    Directory of Open Access Journals (Sweden)

    McLean SM

    2016-04-01

    Full Text Available Sionnadh Mairi McLean,1 Andrew Booth,2 Melanie Gee,3 Sarah Salway,2 Mark Cobb,4 Sadiq Bhanbhro,3 Susan A Nancarrow5 1Faculty of Health and Wellbeing, Sheffield Hallam University, Sheffield, UK; 2School of Health and Related Research, University of Sheffield, Sheffield, UK; 3Centre for Health and Social Care Research, Sheffield Hallam University, Sheffield, UK; 4Therapeutics & Palliative Care, Sheffield Teaching Hospitals, Sheffield, UK; 5School of Health and Human Science, Southern Cross University, East Lismore, NSW, Australia Abstract: Missed appointments are an avoidable cost and resource inefficiency which impact upon the health of the patient and treatment outcomes. Health care services are increasingly utilizing reminder systems to manage these negative effects. This study explores the effectiveness of reminder systems for promoting attendance, cancellations, and rescheduling of appointments across all health care settings and for particular patient groups and the contextual factors which indicate that reminders are being employed sub-optimally. We used three inter-related reviews of quantitative and qualitative evidence. Firstly, using pre-existing models and theories, we developed a conceptual framework to inform our understanding of the contexts and mechanisms which influence reminder effectiveness. Secondly, we performed a review following Centre for Reviews and Dissemination guidelines to investigate the effectiveness of different methods of reminding patients to attend health service appointments. Finally, to supplement the effectiveness information, we completed a review informed by realist principles to identify factors likely to influence non-attendance behaviors and the effectiveness of reminders. We found consistent evidence that all types of reminder systems are effective at improving appointment attendance across a range of health care settings and patient populations. Reminder systems may also increase cancellation and

  3. Use of a 12 months' self-referral reminder to facilitate uptake of bowel scope (flexible sigmoidoscopy) screening in previous non-responders: a London-based feasibility study

    Science.gov (United States)

    Kerrison, Robert S; McGregor, Lesley M; Marshall, Sarah; Isitt, John; Counsell, Nicholas; Wardle, Jane; von Wagner, Christian

    2016-01-01

    Background: In March 2013, NHS England extended its national Bowel Cancer Screening Programme to include ‘one-off' Flexible Sigmoidoscopy screening (NHS Bowel Scope Screening, BSS) for men and women aged 55. With less than one in two people currently taking up the screening test offer, there is a strong public health mandate to develop system-friendly interventions to increase uptake while the programme is rolling out. This study aimed to assess the feasibility of sending a reminder to previous BSS non-responders, 12 months after the initial invitation, with consideration for its potential impact on uptake. Method: This study was conducted in the ethnically diverse London Boroughs of Brent and Harrow, where uptake is below the national average. Between September and November 2014, 160 previous non-responders were randomly selected to receive a reminder of the opportunity to self-refer 12 months after their initial invitation. The reminder included instructions on how to book an appointment, and provided options for the time and day of the appointment and the gender of the endoscopist performing the test. To address barriers to screening, the reminder was sent with a brief locally tailored information leaflet designed specifically for this study. Participants not responding within 4 weeks were sent a follow-up reminder, after which there was no further intervention. Self-referral rates were measured 8 weeks after the delivery of the follow-up reminder and accepted as final. Results: Of the 155 participants who received the 12 months' reminder (returned to sender, n=5), 30 (19.4%) self-referred for an appointment, of which 24 (15.5%) attended and were successfully screened. Attendance rates differed by gender, with significantly more women attending an appointment than men (20.7% vs 8.8%, respectively; OR=2.73, 95% CI=1.02–7.35, P=0.05), but not by area (Brent vs Harrow) or area-level deprivation. Of the 30 people who self-referred for an appointment, 27 (90

  4. Selection of heat treatments temperature of AlSi13Cu2Fe silumin on base of ATD method

    Directory of Open Access Journals (Sweden)

    J. Pezda

    2008-08-01

    Full Text Available Nowadays tendency connected with reduction of design structures’ mass effects in growing significance of usage of silumins, which are the most widespread alloys of aluminum. Mechanical and technological properties of machine parts manufactured from Al-Si alloys are determined by their structure. In case of cast parts, structure of alloy is a derivative of properly performed process of melting and pouring, as well as design of the casting and mould. Mechanical properties of alloys destined to machine parts made in casting process can be upgraded by modification. Possible heat treatment performed for a cast products effects in further improvement of their mechanical properties, based on precipitation processes. Selection of proper parameters of heat treatment process impacts directly on reduction of production costs of the castings.The paper presents an attempt of implementation of ATD method to determination of solution heat treatment and ageing treatment of AK132 silumin. Obtained results concern registered curves of ATD method, strength tests and determination of an effect of heat treatment temperatures on Rm tensile strength of modified AK132 silumin. On base of preliminary tests results there was determined an impact of temperature changes of solution heat treatment and ageing treatment on Rm tensile strength of AK132 silumin.

  5. Differentially selective chemosensor with fluorescence off-on responses on Cu(2+) and Zn(2+) ions in aqueous media and applications in pyrophosphate sensing, live cell imaging, and cytotoxicity.

    Science.gov (United States)

    Anbu, Sellamuthu; Ravishankaran, Rajendran; Guedes da Silva, M Fátima C; Karande, Anjali A; Pombeiro, Armando J L

    2014-07-01

    A new benzoyl hydrazone based chemosensor R is synthesized by Schiff base condensation of 2,6-diformyl-4-methylphenol and phenyl carbohydrazide and acts as a highly selective fluorescence sensor for Cu(2+) and Zn(2+) ions in aqueous media. The reaction of R with CuCl2 or ZnCl2 forms the corresponding dimeric dicopper(II) [Cu2(R)(CH3O)(NO3)]2(CH3O)2 (R-Cu(2+)) and dizinc(II) [Zn2(R)2](NO3)2 (R-Zn(2+)) complexes, which are characterized, as R, by conventional techniques including single-crystal X-ray analysis. Electronic absorption and fluorescence titration studies of R with different metal cations in a CH3CN/0.02 M HEPES buffer medium (pH = 7.3) show a highly selective binding affinity only toward Cu(2+)and Zn(2+) ions even in the presence of other commonly coexisting ions such as Na(+), K(+), Mg(2+), Ca(2+), Mn(2+), Fe(2+), Fe(3+), Co(2+), Ni(2+), Cd(2+), and Hg(2+). Quantification of the fluorescence titration analysis shows that the chemosensor R can indicate the presence of Cu(2+)and Zn(2+) even at very low concentrations of 17.3 and 16.5 ppb, respectively. R-Zn(2+) acts as a selective metal-based fluorescent sensor for inorganic pyrophosphate ion (PPi) even in the presence of other common anions such as F(-), Cl(-), Br(-), I(-), CH3COO(-), CO3(2-), HCO3(-), N3(-), SO4(2-), PPi, AMP, ADP, and ATP in an aqueous medium. The propensity of R as a bioimaging fluorescent probe to detect Cu(2+) and Zn(2+) ions in human cervical HeLa cancer cell lines and their cytotoxicity against human cervical (HeLa), breast cancer (MCF7), and noncancer breast epithelial (MCF10a) cells have also been investigated. R-Cu(2+) shows better cytotoxicity and sensitivity toward cancer cells over noncancer cells than R and R-Zn(2+) under identical conditions, with the appearance of apoptotic bodies.

  6. Highly Selective Bifunctional Luminescent Sensor toward Nitrobenzene and Cu(2+) Ion Based on Microporous Metal-Organic Frameworks: Synthesis, Structures, and Properties.

    Science.gov (United States)

    Yang, Lirong; Lian, Chen; Li, Xuefei; Han, Yuyang; Yang, Lele; Cai, Ting; Shao, Caiyun

    2017-05-24

    Two metal-organic frameworks (MOFs), namely, [Ni(DTP)(H2O)]n (I) and [Cd2(DTP)2(bibp)1.5]n (II) (H2DPT = 4'-(4-(3,5-dicarboxylphenoxy) phenyl)-4,2':6',4″-terpyridine; bibp = 1,3-di(1H-imidazol-1-yl)propane), that present structural diversity were solvothermally prepared. Single-crystal X-ray diffraction analysis indicates that they consist of {NiN2O4} building units (for I) and {CdO4N2} and {CdO3N3} building units (for II), which are further linked by multicarboxylate H2DPT to construct microporous three-dimensional frameworks. The remarkable character of these frameworks is that coordination polymer II demonstrates highly selective and sensitive bifunctional luminescent sensor toward nitrobenzene and Cu(2+) ion. The fluorescence quenching mechanism of II caused by nitrobenzene is ascribed to electron transfer from electron-rich (II) to electron-deficient nitrobenzene. The result was also evidenced by the density functional theory. Furthermore, anti-ferromagnetic as well as electrochemical characters of Ni-MOF (I) were also investigated in this paper.

  7. Facile one-pot synthesis of luminescent-thiolated Au nanocluster and Au(I)–thiolate complexes as highly selective Cu{sup 2+} probes

    Energy Technology Data Exchange (ETDEWEB)

    Pal, Nabin Kumar; Kryschi, Carola, E-mail: carola.kryschi@fau.de [Friedrich-Alexander University of Erlangen-Nuremberg, Department of Chemistry and Pharmacy and ICMM (Germany)

    2015-05-15

    Here in this paper, we reported of a facile photo-induced one-step method for synthesizing highly luminescent Au(I)–thiolate complexes (size ∼2–3 nm) and thiolated Au nanocluster (AuNC, size ∼1.6 nm). The hydrophilic thiol being 3-mercaptopropanoic acid (3-MPA) was used as stabilizing agent. The as-prepared Au(I)–thiolate complexes exhibit bright red photoluminescence (PL) and were used as an efficient sensor for the selective detection of Cu{sup 2+} ions. We also observed the formation of thiol-stabilized Au nanoparticles through continuous electron beam irradiation of Au(I)–thiolated complexes. The Au(I)–thiolate complexes show a PL lifetime on the μs time scale, whereas the PL lifetime of the thiolated AuNC is on the ns time scales. The photo-physical, electronic, structural and morphological properties of the thiolated AuNC and Au(I)–thiolate complexes were examined upon performing UV–Vis absorption spectroscopy, stationary and time-resolved PL spectroscopy, X-ray photoelectron spectroscopy, femtosecond transient absorption spectroscopy and transmission electron microscopy experiments.

  8. Pentiptycene-Based Luminescent Cu (II) MOF Exhibiting Selective Gas Adsorption and Unprecedentedly High-Sensitivity Detection of Nitroaromatic Compounds (NACs)

    Science.gov (United States)

    Zhang, Minghui; Zhang, Liangliang; Xiao, Zhenyu; Zhang, Qinhui; Wang, Rongming; Dai, Fangna; Sun, Daofeng

    2016-02-01

    The assembly of a fluorescent pentiptycene-based ligand with copper ion resulted in the formation of a 3D porous metal-organic framework (UPC-21) based on well-known paddlewheel SBUs. UPC-21 exhibits selective adsorption of CO2 over CH4 and N2 at 273 K and 295 K, C2H2 over CH4 at 273 K. The most significant performance of UPC-21 is its highly efficient detection of NACs such as 4-NP, 1,4-DNB, NB, and 1,3-DNB with the calculated quenching constants, Ksv, being 3.097 × 106, 1.406 × 106, 4.420 × 105, and 1.498 × 105 M-1 for 4-NP, 1,4-DNB, NB, 1,3-DNB, respectively, which keeps a record on the fluorescence detection of NACs. This is the first porous Cu(II) MOF that exhibits fluorescent detection of NACs with high sensitivities.

  9. Pentiptycene-Based Luminescent Cu (II) MOF Exhibiting Selective Gas Adsorption and Unprecedentedly High-Sensitivity Detection of Nitroaromatic Compounds (NACs)

    Science.gov (United States)

    Zhang, Minghui; Zhang, Liangliang; Xiao, Zhenyu; Zhang, Qinhui; Wang, Rongming; Dai, Fangna; Sun, Daofeng

    2016-01-01

    The assembly of a fluorescent pentiptycene-based ligand with copper ion resulted in the formation of a 3D porous metal-organic framework (UPC-21) based on well-known paddlewheel SBUs. UPC-21 exhibits selective adsorption of CO2 over CH4 and N2 at 273 K and 295 K, C2H2 over CH4 at 273 K. The most significant performance of UPC-21 is its highly efficient detection of NACs such as 4-NP, 1,4-DNB, NB, and 1,3-DNB with the calculated quenching constants, Ksv, being 3.097 × 106, 1.406 × 106, 4.420 × 105, and 1.498 × 105 M−1 for 4-NP, 1,4-DNB, NB, 1,3-DNB, respectively, which keeps a record on the fluorescence detection of NACs. This is the first porous Cu(II) MOF that exhibits fluorescent detection of NACs with high sensitivities. PMID:26857592

  10. Selective hydrogenolysis of raw glycerol to 1,2-propanediol over Cu-ZnO catalysts in fixed-bed reactor.

    Science.gov (United States)

    Gao, Qiang; Xu, Bolian; Tong, Qing; Fan, Yining

    2016-01-01

    The catalytic properties of Cu-ZnO catalysts for glycerol hydrogenolysis to 1,2-propanediol (1,2-PDO) were tested in a fixed-bed reactor at 250 °C and 2.0 MPa H2. The relation between composition, surface properties, and catalytic performance of glycerol hydrogenation of Cu-ZnO catalysts was studied using nitrogen adsorption (BET methods), XRD, H2 temperature-programmed reduction, and N2O chemisorptions. It was found that there was a close link between the surface CuO amount of Cu-ZnO catalyst and the reactivity for glycerol hydrogenation. The Cu-ZnO catalyst (Cu/Zn = 1.86) which had the highest surface Cu amount showed the best catalytic activity for glycerol hydrogenolysis. Furthermore, Cu-ZnO catalyst presented good stability and remarkable catalytic activity for glycerol hydrogenolysis to 1,2-PDO using raw glycerol derived from the fat saponification as feedstock.

  11. "Necesita una vacuna": what Spanish-speakers want in text-message immunization reminders.

    Science.gov (United States)

    Ahlers-Schmidt, Carolyn R; Chesser, Amy; Brannon, Jennifer; Lopez, Venessa; Shah-Haque, Sapna; Williams, Katherine; Hart, Traci

    2013-08-01

    Appointment reminders help parents deal with complex immunization schedules. Preferred content of text-message reminders has been identified for English-speakers. Spanish-speaking parents of children under three years old were recruited to develop Spanish text-message immunization reminders. Structured interviews included questions about demographic characteristics, use of technology, and willingness to receive text reminders. Each participant was assigned to one user-centered design (UCD) test: card sort, needs analysis or comprehension testing. Respondents (N=54) were female (70%) and averaged 27 years of age (SD=7). A card sort of 20 immunization-related statements resulted in identification of seven pieces of critical information, which were compiled into eight example texts. These texts were ranked in the needs assessment and the top two were assessed for comprehension. All participants were able to understand the content and describe intention to act. Utilizing UCD testing, Spanish-speakers identified short, specific text content that differed from preferred content of English-speaking parents.

  12. Can a Repeated Opt-Out Reminder remove hypothetical bias in discrete choice experiments?

    DEFF Research Database (Denmark)

    Alemu, Mohammed Hussen; Olsen, Søren Bøye

    Recent papers have suggested that use of a so-called Repeated Opt-Out Reminder (ROOR) might mitigate hypothetical bias in stated Discrete Choice Experiments (DCE), but evidence so far has only been circumstantial. We provide the first comprehensive test of whether a ROOR can actually mitigate...

  13. The hidden costs of nudging: Experimental evidence from reminders in fundraising

    DEFF Research Database (Denmark)

    Damgaard, Mette Trier; Gravert, Christina

    We document the hidden costs of a popular nudge and show how these costs distort policy making when neglected. In a field experiment with a charity, we find reminders increasing intended behavior (donations), but also increasing avoidance behavior (unsubscriptions from the mailing list). We devel...

  14. EPA Reminds Flint Residents to Take Steps to Reduce Potential Lead Contamination Hotline Established for Residents

    Science.gov (United States)

    FLINT, MICH. - The U.S. Environmental Protection Agency is reminding Flint residents to take steps to remove debris that may have accumulated in faucet aerators, hot water heaters, and whole-house water filtration systems. When water flows from the d

  15. Digestive and cardiovascular responses to core and animal-reminder disgust

    NARCIS (Netherlands)

    van Overveld, W. J. M.; de Jong, Peter J.; Peters, Madelon L.

    2009-01-01

    The two-stage model of disgust differentiates between core and animal-reminder (AR) disgust [Rozin P., Fallon A., 1987. A perspective on disgust. Psychological Review 94, 23-41]. This study investigates whether core and A-R disgust elicit distinct physiological reaction patterns. Further, in line wi

  16. Preferential processing of visual trauma-film reminders predicts subsequent intrusive memories

    NARCIS (Netherlands)

    Verwoerd, J.R.L.; Wessel, I.; De Jong, P.J.; Nieuwenhuis, Maurice

    2009-01-01

    This study used an analogue design to test the hypothesis that preferential processing of visual trauma reminders in the aftermath of a stressful or traumatic event gives rise to subsequent intrusive memories. Shortly after the presentation of a stressful film fragment, participants (n=36) were

  17. Feasibility study of the use of a daily electronic mail reminder to improve oral contraceptive compliance.

    Science.gov (United States)

    Fox, Michelle C; Creinin, Mitchell D; Murthy, Amitasrigowri S; Harwood, Bryna; Reid, Lynn M

    2003-11-01

    Women who ingest their oral contraceptive pill (OCP) as part of a daily routine are more likely use their OCPs correctly. This trial examines the feasibility of an electronic-mail (e-mail) reminder system to improve OCP compliance. An e-mail reminder was sent to 50 new OCP users daily for 3 months. Subjects sent an e-mail reply to confirm receipt. OCP compliance was recorded on diaries. Four subjects were discontinued for not checking their e-mail. Active participants missed a median of 18% of the e-mail reminders (range: 0-65%). A follow-up visit was scheduled after completion of three OCP cycles. Of the 40 subjects returning completed diaries, 50% missed no active pills at all and 20% missed at least one in each cycle. Most found the daily e-mail somewhat (65%) or very helpful (19%) for OCP compliance. Of those continuing OCPs, 64% wanted to continue receiving e-mail reminders at the completion of the study. Because inconsistent OCP use is a significant cause of unplanned conception, the use of e-mail to improve OCP compliance has the potential to decrease unintended pregnancies.

  18. The effectiveness of interventions using electronic reminders to improve adherence to chronic medication: a systematic review of the literature

    NARCIS (Netherlands)

    Vervloet, M.; Linn, A.J.; van Weert, J.C.M.; de Bakker, D.H.; Bouvy, M.L.; van Dijk, L.

    2012-01-01

    Background: Many patients experience difficulties in adhering to long-term treatment. Although patients' reasons for not being adherent are diverse, one of the most commonly reported barriers is forgetfulness. Reminding patients to take their medication may provide a solution. Electronic reminders (

  19. The effectiveness of interventions using electronic reminders to improve adherence to chronic medication: a systematic review of the literature.

    NARCIS (Netherlands)

    Vervloet, M.; Linn, A.J.; Weert, J.C.M. van; Bakker, D.H. de; Bouvy, M.L.; Dijk, L. van

    2012-01-01

    Background: Many patients experience difficulties in adhering to long-term treatment. Although patients’ reasons for not being adherent are diverse, one of the most commonly reported barriers is forgetfulness. Reminding patients to take their medication may provide a solution. Electronic reminders (

  20. Contraception: What method should be selected? Anticoncepción: ¿Cuál método seleccionar?

    Directory of Open Access Journals (Sweden)

    John Jairo Zuleta Tobón

    2008-09-01

    Full Text Available Background: Women considering the use of contraception should receive detailed information enabling them to select the most convenient method and to use it effectively. Objetive: To provide valid information and guidelines for health care personnel on the useof contraceptive methods. Metods: A systematic bibliographic review was carried out on the efficacy, effectiveness, and costeffectivenes of the contraceptive methods available in Colombia, and of their continuation rates. Based on the review, a proposal is presented for the selection of the most convenient method, aimed at women without medical conditions that may contraindicate their use. Results: The currently available long-acting reversible contraceptive methods (intrauterine devices, the intrauterine system, injectable contraceptives and implants are more cost- effective than the combined oral contraceptive pill.

     

    Antecedentes:
  1. A Prospective Controlled Trial of an Electronic Hand Hygiene Reminder System

    Science.gov (United States)

    Ellison, Richard T.; Barysauskas, Constance M.; Rundensteiner, Elke A.; Wang, Di; Barton, Bruce

    2015-01-01

    Background. The use of electronic hand hygiene reminder systems has been proposed as an approach to improve hand hygiene compliance among healthcare workers, although information on efficacy is limited. We prospectively assessed whether hand hygiene activities among healthcare workers could be increased using an electronic hand hygiene monitoring and reminder system. Methods. A prospective controlled clinical trial was conducted in 2 medical intensive care units (ICUs) at an academic medical center with comparable patient populations, healthcare staff, and physical layout. Hand hygiene activity was monitored concurrently in both ICUs, and the reminder system was installed in the test ICU. The reminder system was tested during 3 administered phases including: room entry/exit chimes, display of real-time hand hygiene activity, and a combination of the 2. Results. In the test ICU, the mean number of hand hygiene events increased from 1538 per day at baseline to 1911 per day (24% increase) with the use of a combination of room entry/exit chimes, real-time displays of hand hygiene activity, and manager reports (P hygiene to room entry/exit events also increased from 26.1% to 36.6% (40% increase, P hygiene events per day) during the follow-up phase. There was no significant change in hand hygiene activity in the control ICU during the course of the trial. Conclusions. In an ICU setting, an electronic hand hygiene reminder system that provided real-time feedback on overall unit-wide hand hygiene performance significantly increased hand hygiene activity. PMID:26430698

  2. Sex-specific impairment of spatial memory in rats following a reminder of predator stress.

    Science.gov (United States)

    Burke, Hanna M; Robinson, Cristina M; Wentz, Bethany; McKay, Jerel; Dexter, Kyle W; Pisansky, Julia M; Talbot, Jeffery N; Zoladz, Phillip R

    2013-07-01

    It has been suggested that cognitive impairments exhibited by people with post-traumatic stress disorder (PTSD) result from intrusive, flashback memories transiently interfering with ongoing cognitive processing. Researchers have further speculated that females are more susceptible to developing PTSD because they form stronger traumatic memories than males, hence females may be more sensitive to the negative effects of intrusive memories on cognition. We have examined how the reminder of a naturalistic stress experience would affect rat spatial memory and if sex was a contributing factor to such effects. Male and female Sprague-Dawley rats were exposed, without contact, to an adult female cat for 30 min. Five weeks later, the rats were trained to locate a hidden platform in the radial-arm water maze and given a single long-term memory test trial 24 h later. Before long-term memory testing, the rats were given a 30-min reminder of the cat exposure experienced 5 weeks earlier. The results indicated that the stress reminder impaired spatial memory in the female rats only. Control manipulations revealed that this effect was not attributable to the original cat exposure adversely impacting learning that occurred 5 weeks later, or to merely exposing rats to a novel environment or predator-related cues immediately before testing. These findings provide evidence that the reminder of a naturalistic stressful experience can impair cognitive processing in rats; moreover, since female rats were more susceptible to the memory-impairing effects of the stress reminder, the findings could lend insight into the existing sex differences in susceptibility to PTSD.

  3. 制备方法对 Cu-SiO2催化剂结构及其生物基木糖醇选择氢解性能的影响%Effect of Preparation Methods on the Structure and Catalytic Performance of Cu-SiO2 Catalysts in the Selective Hydrogenolysis of Biomass-derived Xylitol

    Institute of Scientific and Technical Information of China (English)

    黄志威; 刘海龙; 贾玉庆; 夏春谷; 陈静; 刘海超

    2015-01-01

    生物质基高碳多元糖醇选择氢解制备高附加值的 C2、C3小分子多元醇具有重要的科学意义和应用前景。采用常规浸渍法(IM)、沉淀凝胶法(PG)、尿素水解沉积沉淀法(UHDP)、蒸氨沉积沉淀法(AEDP)和异相沉积沉淀法(HTDP)等5种不同方法制备了纳米 Cu-SiO2催化剂,通过 XRD、XPS、H2-TPR、BET 和 N2 O 化学吸附等不同方法对催化剂结构进行了表征,以 Ca(OH)2为助剂考察了催化剂在生物基木糖醇选择氢解制备乙二醇和1,2-丙二醇反应中的催化性能。结果显示:制备方法不同 Cu-SiO2催化剂的表面和体相组成不同,IM催化剂焙烧样品表面主要以 CuO 存在,AEDP 和 HTDP 焙烧样品的表面主要是页硅酸铜,而 PG 和 UHDP 焙烧样品的表面 CuO 和页硅酸铜共存;IM和 UHDP 焙烧样品的体相以团聚的大颗粒 CuO 为主,PG 和 HTDP 样品以高分散 CuO 为主, AEDP 样品体相以高分散无定形页硅酸铜存在。受样品中物相组成的影响,不同方法所制备催化剂的分散度按AEDP >PG >HTDP >UHDP >IM顺序递减,经 H2还原活化后,催化剂中 Cu0颗粒尺寸按相反顺序递增。催化剂的木糖醇氢解反应活性和二元醇目标产物选择性受制备方法影响十分明显,均按 AEDP、PG、HTDP、UHDP 和 IM的顺序先增高后降低,以 UHDP 法制备的 Cu 颗粒尺寸在12 nm 左右的催化剂表现最佳,主要原因是该反应为结构敏感型反应,活性和选择性依赖于 Cu 颗粒尺寸。%The selective hydrogenolysis of biomass-derived polyols to value-added etheylene glycol and propylene glycol has important scientific significance and application prospects.Five different methods including conventional impregnation (IM),precipitation-gel (PG),urea hydrolysis deposition-precipitation (UHDP),ammonia-evapora-tion deposition-precipitation (AEDP)and heterogeneous deposition-precipitation (HTDP)have been

  4. Speciation of Cu in MSWI bottom ash and its relation to Cu leaching

    Energy Technology Data Exchange (ETDEWEB)

    Arickx, S. [Department of Chemical Engineering, Katholieke Universiteit Leuven, W. de Croylaan 46, B-3001 Leuven (Belgium)], E-mail: stefanie.arickx@telenet.be; Gerven, T. van [Department of Chemical Engineering, Katholieke Universiteit Leuven, W. de Croylaan 46, B-3001 Leuven (Belgium); Boydens, E.; L' Hoest, P.; Blanpain, B. [Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven, Kasteelpark Arenberg 44, B-3001 Leuven (Belgium); Vandecasteele, C. [Department of Chemical Engineering, Katholieke Universiteit Leuven, W. de Croylaan 46, B-3001 Leuven (Belgium)], E-mail: carlo.vandecasteele@cit.kuleuven.be

    2008-12-15

    In Flanders, recycling of bottom ash is mainly inhibited by the high leaching of Cu. Although it has been proved that dissolved organic C plays a major role in the Cu leaching, the possible role of inorganic Cu mineral speciation has never been experimentally examined. In this study the speciation of Cu is investigated using a combination of optical microscopy and electron microprobe -WDX/EDX. Several Cu species were determined. Metallic Cu (with or without an oxide shell), CuO and Cu{sub 2}O were the most abundant. These particles were most likely present in wire-like structures. Copper also occurred as alloy (brass, bronze, zamak), and was found frequently together with typical elements such as Ca, Cl and S. Finally, small metallic Cu particles seemed to be trapped in or precipitated on oxides and silicates. Based on this Cu speciation study, pure Cu minerals were selected and leached as a function of time. The solubility after equilibrium of all studied Cu minerals never exceeded 20 {mu}g/L (which equals 10% of the total Cu leaching). The effect of heating (2 h at 400 deg. C) on the speciation of Cu was investigated using the same combination of techniques. Results show that metallic Cu seemed to be converted to Cu oxide (mostly CuO) and that the particles were more porous after heating. These conclusions were verified by XRD analysis of the heated pure Cu minerals. After heating, the Cu minerals were also leached as a function of time, to study the impact on Cu leaching. Results indicate that their leaching had slightly increased in comparison with the non-heated Cu minerals. However, the major decrease in Cu leaching in heated bottom ash, more than neutralizes this effect and thus can be attributed to the destruction of organic matter and not to the (small) change in Cu speciation.

  5. Nonconformities in real-world fatal crashes--electronic stability control and seat belt reminders.

    Science.gov (United States)

    Lie, Anders

    2012-01-01

    Many new safety systems are entering the market. Vision Zero is a safety strategy aiming at the elimination of fatalities and impairing injuries by the use of a holistic model for safe traffic to develop a safe system. The aim of this article is to analyze fatalities in modern cars with respect to the Vision Zero model with special respect to electronic stability control (ESC) systems and modern seat belt reminders (SBRs). The model is used to identify and understand cases where cars with ESC systems lost control and where occupants were unbelted in a seat with seat belt reminders under normal driving conditions. The model for safe traffic was used to analyze in-depth studies of fatal crashes with respect to seat belt use and loss of control. Vehicles from 2003 and later in crashes from January 2004 to mid-2010 were analyzed. The data were analyzed case by case. Cars that were equipped with ESC systems and lost control and occupants not using the seat belt in a seat with a seat belt reminder were considered as nonconformities. A total of 138 fatal crashes involving 152 fatally injured occupants were analyzed. Cars with ESC systems had fewer loss-of-control-relevant cases than cars without ESC systems. Thirteen percent of the ESC-equipped vehicles had loss-of-control-relevant crashes and 36 percent of the cars without ESC systems had loss-of-control-relevant crashes. The analysis indicates that only one car of the 9 equipped with ESC that lost control did it on a road surface with relevant friction when driving within the speed restriction of the road. In seats with seat belt reminders that are in accordance with the European New Car Assessment Programme's (Euro NCAP) protocol, 93 percent of the occupants were using a seat belt. In seats without reminders this number was 74 percent. This study shows that ESC systems result in a very significant reduction in fatal crashes, especially under normal driving conditions. Under extreme driving conditions such as speeding

  6. Selective catalytic reduction of NOx with NH3 over a Cu-SSZ-13 catalyst prepared by a solid state ion exchange method

    Energy Technology Data Exchange (ETDEWEB)

    Wang, Di; Gao, Feng; Peden, Charles HF; Li, Junhui; Kamasamudram, Krishna; Epling, William S.

    2014-06-01

    A novel solid state method was developed to synthesize Cu-SSZ-13 catalysts with excellent NH3-SCR performance and durable hydrothermal stability. After the solid state ion exchange (SSIE) process, the SSZ framework structure and surface area was maintained. In-situ DRIFTS and NH3-TPD experiments provide evidence that isolated Cu ions were successfully exchanged into the pores, which are the active centers for the NH3-SCR reaction.

  7. Testing spatial preferences response patterns in Choice experiments: A comparison between Cheap Talk, Opt-Out Reminder and a control group

    DEFF Research Database (Denmark)

    Bjerregaard, Casper; Ladenburg, Jacob

    responses are related to the use of hypothetical bias mitigation reminders, such as budget reminders, cheap talk (Cummings and Taylor 1999; Loomis et al. 1994). The relevance of this is particularly evident as increasing studies find evidence of the Cheap Talk reminders are less effective in CE (Ladenburg...

  8. Increases in generative concern among older adults following reminders of mortality.

    Science.gov (United States)

    Maxfield, Molly; Greenberg, Jeff; Pyszczynski, Tom; Weise, David R; Kosloff, Spee; Soenke, Melissa; Abeyta, Andrew A; Blatter, Jamin

    2014-01-01

    According to terror management theory, people are motivated to protect themselves from the potential for anxiety resulting from awareness of mortality. It was hypothesized that increased concern for future generations, and the symbolic immortality this produces, may be particularly important to older adults when awareness of their mortality is increased. In two studies, older and younger adults' generative concern was examined following mortality or control primes. As hypothesized, older adults' generative concern and preference for pro-social over pro-self generativity were greater following reminders of mortality, whereas neither effect was observed among younger adults. For both studies, age differences were only observed when mortality salience was heightened; older and younger adults' generative concern did not differ in control conditions. Results provide support for the hypothesis that younger and older adults differ in their responses to increased awareness of mortality and suggest that older adults respond to death reminders by adopting a more pro-social generative orientation.

  9. Amplified electrochemical sensor employing CuO/SWCNTs and 1-butyl-3-methylimidazolium hexafluorophosphate for selective analysis of sulfisoxazole in the presence of folic acid.

    Science.gov (United States)

    Karimi-Maleh, Hassan; Amini, Fatemeh; Akbari, Ahmad; Shojaei, Moein

    2017-06-01

    In the present work, CuO nanoparticle decorated on single wall carbon nanotubes (CuO/SWCNTs) nanocomposite was successfully synthesized by chemical precipitation method and used for modification of carbon paste electrode (CPE) in the presence of 1-butyl-3-methylimidazolium hexafluorophosphate (1-B-3-MIHFP) liquid as binder. The novel voltammetric sensor was used as first electrochemical sensor for determination of sulfisoxazole (SFX). CuO/SWCNTs nanocomposite characterized by scanning electron microscopy (SEM) and X-ray powder diffraction (XRD) methods. Voltammetric methods such as cyclic voltammetry, square wave voltammetry (SWV), electrochemical impedance spectroscopy (EIS) and chronoamperometry were performed to assess the electrochemical performance of CuO/SWCNTs/1-B-3-MIHFP/CPE towards SFX in aqueous solution. The voltammetric obtained data confirm the significant enhancement of oxidation current and reduction overvoltage for electro-oxidation of SFX at a surface of CuO/SWCNTs/1-B-3-MIHFP/CPE. The square wave voltammetric response shows the linear increment of oxidation signals with an increase in the concentration of SFX in the range of 0.08-650μM with limit of detection 0.04μM. Using CuO/SWCNTs/1-B-3-MIHFP/CPE the SFX and folic acid peaks are separated ca. 0.72 and 0.895V, respectively; hence SFX can be detected in the presence of folic acid. Finally, the CuO/SWCNTs/1-B-3-MIHFP/CPE was used as high sensitive tools for analysis of SFX and folic acid in real samples.

  10. Facile synthesis of spinel CuCr{sub 2}O{sub 4} nanoparticles and studies of their photocatalytic activity in degradation of some selected organic dyes

    Energy Technology Data Exchange (ETDEWEB)

    Paul, Bappi; Bhuyan, Bishal [Department of Chemistry, National Institute of Technology Silchar, Silchar, 788010, Assam (India); Purkayastha, Debraj Dhar, E-mail: debrajdp@yahoo.com [Department of Chemistry, National Institute of Technology Silchar, Silchar, 788010, Assam (India); Dhar, Siddhartha Sankar, E-mail: ssd_iitg@hotmail.com [Department of Chemistry, National Institute of Technology Silchar, Silchar, 788010, Assam (India); Behera, Satyananda [Department of Ceramic Engineering, National Institute of Technology Rourkela, Rourkela, 769008, Odisha (India)

    2015-11-05

    Copper chromite (CuCr{sub 2}O{sub 4}) spinel nanoparticle catalysts have been successfully synthesized employing urea assisted co-precipitation followed by calcination. The synthesized nanoparticles were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), and N{sub 2} adsorption-desorption isotherm (BET). The XRD pattern revealed formation of tetragonal body-centered CuCr{sub 2}O{sub 4} and TEM image showed quasi-spherical particles of size 5–35 nm. The photocatalytic activity of CuCr{sub 2}O{sub 4} was evaluated in degradation of some organic dyes such as methylene blue (MB), methyl orange (MO), and rhodamine B (RhB), without and with the assistance of H{sub 2}O{sub 2} under solar irradiation. The CuCr{sub 2}O{sub 4} photocatalysts showed high activity in degradation of RhB (93.6%) and MO (92.3%), but low activity in degradation of MB (80.6%). The catalyst reusability was tested by conducting the degradation of RhB dye with the spent catalyst and it was observed that the catalyst did not show any significant loss in its activity even after five cycles. - Highlights: • CuCr{sub 2}O{sub 4} nanoparticles were synthesized by urea assisted co-precipitation followed by calcination. • The XRD pattern revealed formation of tetragonal body-centered CuCr{sub 2}O{sub 4}. • The TEM images showed the material to be quasi-spherical in shape with sizes 5–35 nm. • CuCr{sub 2}O{sub 4} nanoparticles exhibited pronounced photocatalytic activity.

  11. Differential activation of amygdala, dorsal and ventral hippocampus following an exposure to a reminder ofunderwater trauma

    Directory of Open Access Journals (Sweden)

    Gilad eRitov

    2014-01-01

    Full Text Available Recollection of emotional memories is attributed in part to the activation of the amygdala and the hippocampus. Recent hypothesis suggest a pivotal role for the ventral hippocampus in traumatic stress processing and emotional memory retrieval. Persistent re-experiencing and intrusive recollections are core symptoms in acute and posttraumatic stress disorders (ASD; PTSD. Such intrusive recollections are often triggered by reminders associated with the trauma.We examined the impact of exposure to a trauma reminder (under water trauma on the activation of the basolateral amygdala (BLA, dorsal and ventral hippocampus. Rats were exposed to underwater trauma and 24 hours later were re-exposed to the context of the trauma. Phosphorylation of the extracellular signal-regulated kinase (ERK was used as a marker for level of activation of these regions. Significant increase in ERK activation was found in the ventral hippocampus and BLA. Such pattern of activation was not found in animals exposed only to the trauma or in animals exposed only to the trauma reminder. Additionally, the dissociative pattern of activation of the ventral hippocampus sub-regions positively correlated with the activation of the BLA.Our findings suggest a specific pattern of neural activation during recollection of a trauma reminder, with a unique contribution of the ventral hippocampus. Measured 24 hrs after the exposure to the traumatic experience, the current findings relate to relatively early stages of traumatic memory consolidation. Understanding the neural mechanisms underlying these initial stages may contribute to developing intervention strategies that could reduce the risk of eventually developing PTSD.

  12. Pleomorphic adenoma of the vulva, clinical reminder of a rare occurrence

    Directory of Open Access Journals (Sweden)

    Neda A. Moatamed

    2012-01-01

    Full Text Available Pleomorphic adenoma, also known as mixed tumor, is a benign tumor which typically presents as a painless and persistent mass. The majority of pleomorphic adenomas involve the salivary glands, most commonly the parotid gland. Other sites include breast and skin. It is a rare tumor in the vulva. In this article we are reporting a case of pleomorphic adenoma of labia with characteristic pathologic and clinical findings, as reminder of a common benign neoplasm occurring with rare locality.

  13. Harmony: A Hand Wash Monitoring and Reminder System using Smart Watches

    Directory of Open Access Journals (Sweden)

    Md Abu Sayeed Mondol

    2015-08-01

    Full Text Available Hand hygiene compliance is extremely important in hospitals, clinics and food businesses. Caregivers' compliance with hand hygiene is one of the most effective tools in preventing healthcare associated infections (HAIs in hospitals and clinics. In food businesses, hand hygiene compliance is essential to prevent food contamination, and thus food borne illness. Washing hands properly is the cornerstone of hand hygiene. However, the hand wash compliance rate by the workers (care givers, waiters, chefs, food processors and so on is not up to the mark. Monitoring hand wash compliance along with a reminder system increases the compliance rate significantly. Quality of a hand wash is also important which can be achieved by washing hands in accordance with standard guidelines. In this paper, we present Harmony, a hand wash monitoring and reminder system that monitors hand wash events and their quality, provides real time feedback, reminds the person of interest when he/she is required to wash hands, and stores related data in a server for further use. Worker worn smart watches are the key components of Harmony that can differentiate hand wash gestures from other gestures with an average accuracy of about 88%. Harmony is robust, scalable, and easy to install, and it overcomes most of the problems of existing related systems.

  14. A randomised trial of the effect of postal reminders on attendance for breast screening

    Science.gov (United States)

    Allgood, Prue C; Maxwell, Anthony J; Hudson, Sue; Offman, Judith; Hutchison, Gillian; Beattie, Cathryn; Tuano-Donnelly, Raquel; Threlfall, Anthony; Summersgill, Tina; Bellis, Lesley; Robinson, Collette; Heaton, Samantha; Patnick, Julietta; Duffy, Stephen W

    2016-01-01

    Background: Some women make an informed choice not to attend breast screening, whereas others may have forgotten about the appointment. We report on a randomised trial that investigates whether a reminder letter affects attendance. Methods: Women scheduled for a breast screening appointment were randomised to either receive a reminder letter a few days before their breast screening appointment in addition to the standard invitation letter (intervention) or not (control). The primary outcome was attendance within 30 days of the first offered appointment. Secondary outcomes were attendance within 90 and 180 days. Results: In all, 11 383 (49.9%) women were randomised to the intervention and 11 445 (50.1%) to the control. In the intervention arm, 7759 (68.2%) attended within 30 days of the first offered appointment compared with 7349 (64.2%) in the control arm. This difference was significant (P<0.001). The odds ratio (OR) (95% confidence interval) for the primary end point was 1.19 (1.13–1.26). This was not significantly affected by age, socioeconomic status or type of screen (prevalent or incident). Secondary endpoint analyses supported these results. Results did differ, however, between the different centres studied. Conclusions: This study found that postal reminders increase breast screening uptake, and could be practicable to implement in the NHS Breast Screening Programme. PMID:26784123

  15. Morphology and phase selective synthesis of Cu{sub x}O (x = 1, 2) nanostructures and their catalytic degradation activity

    Energy Technology Data Exchange (ETDEWEB)

    Xi Yi [Department of Applied Physics, Chongqing University, Chongqing 400044 (China); Hu Chenguo, E-mail: hucg@cqu.edu.c [Department of Applied Physics, Chongqing University, Chongqing 400044 (China); Gao Puxian; Yang Rusen [School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245 (United States); He Xiaoshan; Wang Xue; Wan Buyong [Department of Applied Physics, Chongqing University, Chongqing 400044 (China)

    2010-01-15

    Cu{sub x}O (x = 1, 2) nanocrystals have been synthesized by the composite-hydroxide-mediated approach. The obtained nanocrystals were characterized by X-ray diffraction, energy dispersive X-ray spectroscopy, scanning electron microscopy, transmission electron microscopy, and UV-vis spectrum. The morphology of the nanocrystals changed from sphere-shaped nanostructures to flower-shaped nanostructures, and finally to nanowires associated with phase transformation from CuO to Cu{sub 2}O by increasing the temperature. The possible phase transformation mechanism was discussed. The catalytic degradation activity of the Cu{sub x}O (x = 1, 2) nanocrystals to methyl orange was also investigated. The photocatalytic ability of the sphere-shaped nanostructures is much higher than that of the nanowires, owing to its absorption of wider range of light energy. This work provides a new facile synthesis route of Cu{sub x}O (x = 1, 2) nanocrystals and suggests their possible application in organic pollutants removal.

  16. Reminder: GSM

    CERN Multimedia

    2003-01-01

    1- Your present GSM subscription (SIM card) will no longer be valid as from the 5th January 2004. 2- Short numbers 16xxxx (where xxxx are your current last 4 digits) will remain valid. 3- Your new number from outside will then be +4176 487xxxx. 4- From the 20th December to the 4th January 2004 (CERN's official holiday) your GSM will be unusable underground. Nota bene: Due to the high costs involved calls from outside will not be automatically diverted to a "combox" indicating that your number has changed. It is therefore up to you to inform your correspondents of your GSM number change. For further information on the GSM Migration see the CERN home page: http://cern.ch/

  17. Ni-Cu Hydrotalcite-Derived Mixed Oxides as Highly Selective and Stable Catalysts for the Synthesis of β-Branched Bioalcohols by the Guerbet Reaction.

    Science.gov (United States)

    Hernández, Willinton Y; De Vlieger, Kevin; Van Der Voort, Pascal; Verberckmoes, An

    2016-11-23

    A series of Ni-Cu hydrotalcite-derived mixed oxides have been synthesized and evaluated as heterogeneous catalysts for the dimerization of linear aliphatic alcohols to afford β-branched Guerbet alcohols. The use of the hydrotalcite-structured catalyst precursor highly favors the catalyst stability. This Cu/Ni catalyst has an enhanced reducibility of Ni(2+) species under reaction conditions, favoring the hydrogen transfer and hydrogenation capacity of the catalyst system. Catalytic results are reported for C8 , mixed C8 /C10 , and C18 alcohol feeds, with full conversions and Guerbet product purities of 72.5-96 %.

  18. A randomized trial of lottery-based incentives and reminders to improve warfarin adherence: the Warfarin Incentives (WIN2) Trial.

    Science.gov (United States)

    Kimmel, Stephen E; Troxel, Andrea B; French, Benjamin; Loewenstein, George; Doshi, Jalpa A; Hecht, Todd E H; Laskin, Mitchell; Brensinger, Colleen M; Meussner, Chris; Volpp, Kevin

    2016-11-01

    Previous research has suggested that daily lottery incentives could improve medication adherence. Such daily incentives include implicit reminders. However, the comparative effectiveness of reminders alone versus daily incentives has not been tested. A total of 270 patients on warfarin were enrolled in a four-arm, multi-center, randomized controlled trial comparing a daily lottery-based incentive, a daily reminder, and a combination of the two against a control group (usual care). Participants in the reminder group had the lowest percentage of time out of target international normalized ratio (INR) range, the primary outcome, with an adjusted odds of an out-of-range INR 36% lower than among those in the control group, 95%CI [7%, 55%]. No other group had a statistically significant improvement in anticoagulation control relative to the control group or to each other. The only group that had significant improvement in incorrect adherence was the lottery group (incorrect adherence: 12.1% compared with 23.7% in the control group, difference of -7.4% 95%CI [-14%, -0.3%]). However, there was no relationship between changes in adherence and anticoagulation control in the lottery group. Automated reminders led to the largest improvements in anticoagulation control, although without impacting measured adherence. Lottery-based reminders improved measured adherence but did not lead to improved anticoagulation control. Copyright © 2016 John Wiley & Sons, Ltd. Copyright © 2016 John Wiley & Sons, Ltd.

  19. Self-doped anthranilic acid-pyrrole copolymer/gold electrodes for selective preconcentration and determination of Cu(I) by differential pulse anodic stripping voltammetry.

    Science.gov (United States)

    Nateghi, M R; Fallahian, M H

    2007-05-01

    Electropolymerization of anthranilic acid/pyrrole (AA/PY) at solid substrate electrodes (platinum, gold, and glassy carbon) gave stable and water-insoluble films under a wide range of pH. Combining high conductivity of the polypyrrole (PPY) and pH independence of the electrochemical activity of the self-doped carboxylic acid-substituted polyaniline allows us to prepare an improved functionalized PPY-modified electrode to collect and measure Cu(I) species. The differential pulse stripping analysis of the copper ions using a polyanthranilic acid-co-polypyrrole (PAA/PPY)-modified electrode consisted of three steps: accumulation, electrochemical reduction to the elemental copper and stripping step. Factors affecting these steps, including electropolymerization conditions, accumulation and stripping medium, reduction potential, reduction time and accumulation time, were systematically investigated. A detection limit of 5.3 x 10(-9) M Cu(I) was achieved for a 7.0 min accumulation. For 12 determinations of Cu(I) at concentrations of 1.0 x 10(-8) M, an RSD of 3.5% was obtained. The log I(p) was found to vary linearly with log[Cu(I)] in the concentration range from 7.0 x 10(-9) to 1.0 x 10(-5) M.

  20. Aspartic acid functionalized water-soluble perylene diimide as “Off-On” fluorescent sensor for selective detection Cu2+ and ATP

    Science.gov (United States)

    Zhong, Lina; Xing, Feifei; Bai, Yueling; Zhao, Yongmei; Zhu, Shourong

    2013-11-01

    Aspartic functionalized water-soluble perylene diimide, N,N‧-di(2-succinic acid)-perylene-3,4,9,10-tetracarboxylic diimide (PASP) has two absorbance maximums at 527 and 498 nm (ε ≈ 1.7 × 104 L cm-1 mol-1) and two emission peaks at 547 and 587 nm respectively. Emission intensities decrease with the increase of PASP concentrations in 20-100 μM ranges. Spectral titrations demonstrate that each PASP can coordinate to two Cu2+ ions in the absence of HEPES buffer. Its stability constant is estimated to be about 1.0 × 1012 L2 mol-2 at pH 7.20 and its coordinate stoichiometry increased to 7.5 in the same pH in the presence of HEPES buffer. The emission of PASP will be completely quenched upon formation of Cu2+ complex. The lowest "turn-off" fluorescence detection limit was calculated to be 0.3 μM Cu2+. PASP-Cu solution was used as a "turn-on" fluorescence biosensor to detect ATP. The sensitivity towards ATP is 0.3 μM in 50 mM HEPES buffer at pH 7.20, which is one of the most sensitive fluorescence sensors.

  1. The efficacy of treatment reminders of life with emphasis on integrative reminiscence on self-esteem and anxiety in widowed old men.

    Directory of Open Access Journals (Sweden)

    Malihe Pishvaei

    2015-03-01

    Full Text Available Loss of wife besides the phenomenon of aging could cause some psychological disorders and may shorten the duration of this stage of life. The aim of this study was to examine the efficacy of treatment reminders of life with emphasis on integrative reminiscence on self-esteem and anxiety in widowed old men.This was a clinical trial with pre-test and post-test design with a control group. The study population included All 60 to 80 year old men living in Meshginshahr; among whom, 34 participants were selected using convenience sampling method. They were randomly allocated into two equal groups (experimental and control. The experimental group participated in therapy sessions and the control group did not receive any intervention. The research instruments were Rosenberg Self-Esteem Scale and the General Anxiety Questionnaire. Data were analyzed using multivariable covariance analysis in SSPS-19. Statistical significance was set at P<0.05.MANCOVA results showed that the treatment positively affected the variables of self-esteem and anxiety in old widowed men (p<0.001.The reminders of life therapy with emphasis on integrative reminiscence may enhance self-esteem and reduce anxiety in widowed old men. This treatment gives better results compared to the traditional treatments and it is recommended to be implemented in nursing homes.

  2. Cued recall measure predicts the progression of gray matter atrophy in patients with amnesic mild cognitive impairment.

    Science.gov (United States)

    Koric, Lejla; Ranjeva, Jean-Philippe; Felician, Olivier; Guye, Maxime; de Anna, Francesca; Soulier, Elisabeth; Didic, Mira; Ceccaldi, Mathieu

    2013-01-01

    Amnesic mild cognitive impairment (aMCI) is a heterogeneous syndrome that could be subdivided into distinct neuropsychological variants. To investigate relationships between the neuropsychological profile of memory impairment at baseline and the neuroimaging pattern of grey matter (GM) loss over 18 months, we performed a prospective volumetric brain study on 31 aMCI patients and 29 matched controls. All subjects were tested at baseline using a standardized neuropsychological battery, which included the Free and Cued Selective Recall Reminding Test (FCSRT) for the assessment of verbal declarative memory. Over 18 months, patients with impaired free recall but normal total recall (high index of cueing) on the FCSRT developed subcortical and frontal GM loss, while patients with impaired free and total recall (low index of cueing) developed GM atrophy within the left anterior and lateral temporal lobe. In summary, cued recall deficits are associated with a progression of atrophy that closely parallels the spatiotemporal distribution of neurofibrillary degeneration in early Alzheimer's disease (AD), indicating possible AD pathological changes.

  3. In situ Synthesis of Cu-SSZ-13/Cordierite Monolithic Catalyst for the Selective Catalytic Reduction of NO with NH3%Cu-SSZ-13/堇青石整体式催化剂的原位合成及其NH3选择性催化还原NO性能

    Institute of Scientific and Technical Information of China (English)

    张宇; 王红宁; 陈若愚

    2015-01-01

    采用水热合成技术,在堇青石蜂窝陶瓷载体上原位合成了SSZ-13分子筛,并借助X射线衍射(XRD)和场发射扫描电子显微镜(FESEM)等手段对其进行表征.在此基础上,研究了合成时间对催化剂结构和机械性能的影响.另外,使用固定床反应器测试了离子交换度为50%的Cu-SSZ-13/堇青石催化剂和Cu-SSZ-13催化剂水热老化前后的氨气选择性催化还原(NH3-SCR) NO性能.结果表明,通过原位合成法制备的Cu-SSZ-13/堇青石催化剂在200-500° C的窗口温度内能达到80%以上的转化率,并在300° C时达到96.4%的转化率.在850°C水热老化12 h后, Cu-SSZ-13催化剂完全丧失了催化性能,而Cu-SSZ-13/堇青石催化剂在300°C时仍然保持91%的转化率.使用XRD和固体27Al核磁共振(27Al NMR)的方法,研究了水热老化前后两种催化剂结构的变化,结果表明,当水热老化12 h后, Cu-SSZ-13基本丧失了SSZ-13结构特征峰,而Cu-SSZ-13/堇青石仍然保持了一定的SSZ-13骨架结构.证明了通过原位合成法制备的Cu-SSZ-13/堇青石催化剂具有较好的抗水热老化性能.%SSZ-13 molecular sieves were synthesized in situ on the surface of a honeycomb-shaped cordierite support using a hydrothermal method, and the resulting material was characterized by X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM). The process for preparing SSZ-13/cordierite was optimized in detail. Furthermore, the ion exchange levels of the 50%Cu-SSZ-13/cordierite and Cu-SSZ-13 catalysts were tested in the ammonia-selective catalytic reduction (NH3-SCR) of NO both before and after the hydrothermal treatment process using a fixed-bed reactor. The results of these experiments showed that the Cu-SSZ-13/cordierite prepared in situ by hydrothermal synthesis had good catalytic activity, and gave an NO conversion of more than 80%at temperatures in the range of 200-500 °C, with the highest NO conversion of

  4. Effectiveness of Electronic Reminders to Improve Medication Adherence in Tuberculosis Patients: A Cluster-Randomised Trial.

    Directory of Open Access Journals (Sweden)

    Xiaoqiu Liu

    2015-09-01

    Full Text Available Mobile text messaging and medication monitors (medication monitor boxes have the potential to improve adherence to tuberculosis (TB treatment and reduce the need for directly observed treatment (DOT, but to our knowledge they have not been properly evaluated in TB patients. We assessed the effectiveness of text messaging and medication monitors to improve medication adherence in TB patients.In a pragmatic cluster-randomised trial, 36 districts/counties (each with at least 300 active pulmonary TB patients registered in 2009 within the provinces of Heilongjiang, Jiangsu, Hunan, and Chongqing, China, were randomised using stratification and restriction to one of four case-management approaches in which patients received reminders via text messages, a medication monitor, combined, or neither (control. Patients in the intervention arms received reminders to take their drugs and reminders for monthly follow-up visits, and the managing doctor was recommended to switch patients with adherence problems to more intensive management or DOT. In all arms, patients took medications out of a medication monitor box, which recorded when the box was opened, but the box gave reminders only in the medication monitor and combined arms. Patients were followed up for 6 mo. The primary endpoint was the percentage of patient-months on TB treatment where at least 20% of doses were missed as measured by pill count and failure to open the medication monitor box. Secondary endpoints included additional adherence and standard treatment outcome measures. Interventions were not masked to study staff and patients. From 1 June 2011 to 7 March 2012, 4,292 new pulmonary TB patients were enrolled across the 36 clusters. A total of 119 patients (by arm: 33 control, 33 text messaging, 23 medication monitor, 30 combined withdrew from the study in the first month because they were reassessed as not having TB by their managing doctor (61 patients or were switched to a different

  5. Insight into the mechanism of selective catalytic reduction of NO(x) by propene over the Cu/Ti(0.7)Zr(0.3)O2 catalyst by Fourier transform infrared spectroscopy and density functional theory calculations.

    Science.gov (United States)

    Liu, Jie; Li, Xinyong; Zhao, Qidong; Hao, Ce; Zhang, Dongke

    2013-05-07

    The mechanism of selective catalytic reduction of NOx by propene (C3H6-SCR) over the Cu/Ti0.7Zr0.3O2 catalyst was studied by in situ Fourier transform infrared (FTIR) spectroscopy and density functional theory (DFT) calculations. Especially, the formation and transformation of cyanide (-CN species) during the reaction was discussed. According to FTIR results, the excellent performance of the Cu/Ti0.7Zr0.3O2 catalyst in C3H6-SCR was attributed to the coexistence of two parallel pathways to produce N2 by the isocyanate (-NCO species) and -CN species intermediates. Besides the hydrolysis of the -NCO species, the reaction between the -CN species and nitrates and/or NO2 was also a crucial pathway for the NO reduction. On the basis of the DFT calculations on the energy of possible intermediates and transition states at the B3LYP/6-311 G (d, p) level of theory, the reaction channel of -CN species in the SCR reaction was identified and the role of -CN species as a crucial intermediate to generate N2 was also confirmed from the thermodynamics view. In combination of the FTIR and DFT results, a modified mechanism with two parallel pathways to produce N2 by the reaction of -NCO and -CN species over the Cu/Ti0.7Zr0.3O2 catalyst was proposed.

  6. Determination of the mechanism of photoinduced toxicity of selected metal oxide nanoparticles (ZnO, CuO, Co3O4 and TiO2) to E.coli bacteria

    Institute of Scientific and Technical Information of China (English)

    Thabitha P.Dasari; Kavitha Pathakoti; Huey-Min Hwang

    2013-01-01

    Cytotoxicity of selected metal oxide nanoparticles (MNPs) (ZnO,CuO,Co3O4 and TiO2) was investigated in Escherichia coli both under light and dark conditions.Cytotoxicity experiments were conducted with spread plate counting and the LCs0 values were calculated.We determined the mechanism of toxicity via measurements of oxidative stress,reduced glutathione,lipid peroxidation,and metal ions.The overall ranking of the LCs0 values was in the order of ZnO < CuO < Co3O4 < TiO2 under dark condition and ZnO < CuO < TiO2 < Co3O4 under light condition.ZnO MNPs were the most toxic among the tested nanoparticles.Our results indicate depletion of reduced glutathione level and elevation of malondialdehyde level correlated with the increase in oxidative stress.Released metal ions were found to have partial effect on the toxicity of MNPs to E.coli.In summary,the dynamic interactions of multiple mechanisms lead to the toxicity of the tested MNPs to E.coli.

  7. [The Effect of Family Member Reminders on Reducing Anxiety and Unplanned Extubation in ICU Patients].

    Science.gov (United States)

    Lin, Li-Ching; Chao, Yann-Fen C; Lin, Pi-Chu

    2017-10-01

    Patients with endotracheal intubation often experience anxiety because they are unable to express their needs freely. However, the family members of these patients are able to provide encouragement, comfort, and substantive support. The aims of the present study were: (1) to compare the anxiety scores, vital signs, and incidence of unplanned extubation (UE) between the two comparison groups; (2) to compare the differences in vital signs before and after the intervention in the experimental group; and (3) to explore the satisfaction of patients in the experimental group with the intervention. A quasi-experimental, pretest-posttest design was carried out. A convenience sampling was adopted to recruit patients with endotracheal intubation in intensive care units (ICUs). The experimental group listened to the UE-prevention reminders of their family members for three times a day for 4 days. The control group was provided with usual care. (1) No significant difference was observed in the anxiety scores between the two groups (t = -1.282, p = .205). (2) A repeated-measures analysis found no significant difference in vital signs, taken nightly at 10 p.m., between the experimental and control groups (p > .05). (3) The experimental group registered significantly lower heart rates, systolic blood pressure, diastolic blood pressure, and mean arterial pressure after the conclusion of the intervention (p family reminders encouraging and reminding patients about intubation safety, achieved a very high level of patient satisfaction and reduced their anxiety-related vital signs. The results may serve as a reference for providing intervention treatment to patients with endotracheal intubation in ICUs.

  8. Using email reminders to engage physicians in an Internet-based CME intervention

    Directory of Open Access Journals (Sweden)

    Wall Terry

    2004-09-01

    Full Text Available Abstract Background Engaging practicing physicians in educational strategies that reinforce guideline adoption and improve the quality of healthcare may be difficult. Push technologies such as email offer new opportunities to engage physicians in online educational reinforcing strategies. The objectives are to investigate 1 the effectiveness of email announcements in engaging recruited community-based primary care physicians in an online guideline reinforcement strategy designed to promote Chlamydia screening, 2 the characteristics of physicians who respond to email announcements, as well as 3 how quickly and when they respond to email announcements. Methods Over a 45-week period, 445 recruited physicians received up to 33 email contacts announcing and reminding them of an online women's health guideline reinforcing CME activity. Participation was defined as physician log-on at least once to the website. Data were analyzed to determine participation, to compare characteristics of participants with recruited physicians who did not participate, and to determine at what point and when participants logged on. Results Of 445 recruited physicians with accurate email addresses, 47.2% logged on and completed at least one module. There were no significant differences by age, race, or specialty between participants and non-participants. Female physicians, US medical graduates and MDs had higher participation rates than male physicians, international medical graduates and DOs. Physicians with higher baseline screening rates were significantly more likely to log on to the course. The first 10 emails were the most effective in engaging community-based physicians to complete the intervention. Physicians were more likely to log on in the afternoon and evening and on Monday or Thursday. Conclusions Email course reminders may enhance recruitment of physicians to interventions designed to reinforce guideline adoption; physicians' response to email reminders may

  9. Breast cancer screening outreach effectiveness: Mammogram-specific reminders vs. comprehensive preventive services birthday letters.

    Science.gov (United States)

    Buist, Diana S M; Gao, Hongyuan; Anderson, Melissa L; Onega, Tracy; Brandzel, Susan; Rabelhofer, Melissa A; Bradford, Susan Carol; Aiello Bowles, Erin J

    2017-09-01

    We compared the effectiveness of two outreach strategies on timely mammography adherence: a mammogram-specific reminder letter (sent just before a woman was due) to a birthday letter (addresses multiple preventive services and not timed around due dates). We evaluated screening mammography adherence following 79,848 mammogram-specific and 151,626 birthday letters mailed between 2002 and 2012 to women aged 40-74years enrolled in Kaiser Permanente Washington. Screening mammogram adherence was specifically tied to due date and was evaluated separately by age group and up-to-date or overdue status at the time of mailing. We used generalized estimating equations to account for correlation between repeated observations, to model the odds of screening mammography adherence by letter type. Among women up-to-date, adherence following birthday letters was 22-76% lower compared to the mammogram-specific reminders, with the greatest decreases in adherence in women aged 70-74. Birthday letters were more effective at activating screening uptake among some subgroups of overdue women aged 50-69 and most overdue women aged 70-74, but universally low adherence rates were observed in overdue women. Increasing number of recommended services for women aged 50-74 who were up-to-date resulted in 12-17% lower mammography adherence, but had no effect in women aged 40-49 or in overdue women. Birthday letters are less effective than mammogram-specific reminder letters at prompting women to undergo timely breast cancer screening, particularly among women up-to-date with screening. Birthday letters may be effective at increasing overall preventive care; however, supplemental outreach may be needed around the due date to increase timely preventive services receipt. Copyright © 2017 Elsevier Inc. All rights reserved.

  10. Cognitive decision strategies adopted by consumers in reminder difference tests: Influence of the authenticity test.

    Science.gov (United States)

    Stocks, M; Shepherd, D; Lee, H-S; van Hout, D; Hautus, M J

    2017-07-01

    Discrimination tests are used in food companies to quantify small differences between products. Within the diversity of methods available, some are quicker to conduct, whereas others are more sensitive or statistically powerful. One class of methods includes the reminder tasks in which the reference product is given before tasting the actual test stimuli. During the task, such a 'reminder' can be compared directly to each test stimulus, or alternatively, only serve to prime the memory of the judge without being taken into account in decision-making. Previous research with trained judges provided evidence for the latter process while research with untrained consumers has provided some evidence for the former process. Two studies were conducted with untrained consumers using the A Not-AR and 2-AFCR reminder tasks. Objectives were to determine the decision strategies used in, and the relative sensitivity of the tasks. In addition, the use of an "authenticity test" was explored to see if this has a positive effect on test performance. In the first study, mayonnaise and ice tea with small stimulus differences (d'decision strategy used, though the use of an authenticity test increased the sensitivity for these small differences, as it improved the performance of 6 out of 8 tests. In the second study, ice teas with larger stimulus differences (at two levels) were tested using the A Not-AR and 2-AFCR tasks, in comparison to the same-different task. The results showed that consumers use the less optimal strategies and that the authenticity test decreases performance, which is contradictory to the results of the first study. It seems that for very small stimulus differences the authenticity test can improve performance, but with larger differences the authenticity test decreases performance; it seems to confuse the judges. Copyright © 2017 Elsevier Ltd. All rights reserved.

  11. Reminder from SC/ME to those in charge of first-aid boxes

    CERN Document Server

    2006-01-01

    The Medical Service wishes to remind all those responsible for first-aid boxes that: all the medication and materials in the boxes must be checked at least once a month to make sure that they are always ready for use when needed; they must notify the Medical Service when their CERN contract comes to an end and designate someone to replace them. NB. The medication and materials supplied are for OCCASIONAL USE only and must not be used to treat personal medical conditions on a regular basis. For further information please contact the Infirmary (Building 57 R.004 - Tel 73802).

  12. New electronic habit reminder for the management of thumb-sucking habit

    Directory of Open Access Journals (Sweden)

    Srinath Krishnappa

    2016-01-01

    Full Text Available Methods for intervention of nonnutritive sucking habits include counseling, positive reinforcement, calendar with rewards, adhesive bandage, bitter nail polish, long sleeves, and appliance therapy. All these methods have been reported in the literature with variable success rates. We present a case of an 8-year-old child with thumb-sucking habit successfully managed in a short period of 5 months by a new electronic habit reminder, an extraoral appliance which was designed to overcome the disadvantages associated with intraoral appliances.

  13. An intervention to change clinician behavior: Conceptual framework for the multicolored simplified asthma guideline reminder (MSAGR).

    Science.gov (United States)

    O'Laughlen, Mary C; Hollen, Patricia; Ting, Stanislaus

    2009-08-01

    Clinical practice guidelines decrease variation in health care because they standardize the care offered by healthcare providers. Seventeen years after publication, the National Asthma Education and Prevention Program (NAEPP) guidelines are considered the "gold standard" in asthma care, yet they remain underutilized despite three revisions with the latest in July 2007. Multiple factors are presented for lack of adherence to the guidelines. This article discusses the Multicolored, Simplified Asthma Guideline Reminder (MSAGR), an algorithm chart intervention for helping change clinicians' behavior for better adherence to the NAEPP guidelines, and describes the conceptual framework underpinning this intervention as a means of predicting better outcomes for providers and children.

  14. Impact of health portal enrollment with email reminders on adherence to clinic appointments: a pilot study.

    Science.gov (United States)

    Horvath, Monica; Levy, Janet; L'Engle, Pete; Carlson, Boyd; Ahmad, Asif; Ferranti, Jeffrey

    2011-05-26

    Internet portal technologies that provide access to portions of electronic health records have the potential to revolutionize patients' involvement in their care. However, relatively few descriptions of the demographic characteristics of portal enrollees or of the effects of portal technology on quality outcomes exist. This study examined data from patients who attended one of seven Duke Medicine clinics and who were offered the option of enrolling in and using the Duke Medicine HealthView portal (HVP). The HVP allows patients to manage details of their appointment scheduling and provides automated email appointment reminders in addition to the telephone and mail reminders that all patients receive. Our objective was to test whether portal enrollment with an email reminder functionality is significantly related to decreases in rates of appointment "no-shows," which are known to impair clinic operational efficiency. Appointment activity during a 1-year period was examined for all patients attending one of seven Duke Medicine clinics. Patients were categorized as portal enrollees or as nonusers either by their status at time of appointment or at the end of the 1-year period. Demographic characteristics and no-show rates among these groups were compared. A binomial logistic regression model was constructed to measure the adjusted impact of HVP enrollment on no-show rates, given confounding factors. To demonstrate the effect of HVP use over time, monthly no-show rates were calculated for patient appointment keeping and contrasted between preportal and postportal deployment periods. Across seven clinics, 58,942 patients, 15.7% (9239/58,942) of whom were portal enrollees, scheduled 198,199 appointments with an overall no-show rate of 9.9% (19,668/198,199). We found that HVP enrollees were significantly more likely to be female, white, and privately insured compared with nonusers. Bivariate no-show rate differences between portal enrollment groups varied widely according

  15. Supporting adherence to antiretroviral therapy with mobile phone reminders: results from a cohort in South India.

    Directory of Open Access Journals (Sweden)

    Rashmi Rodrigues

    Full Text Available BACKGROUND: Adherence is central to the success of antiretroviral therapy. Supporting adherence has gained importance in HIV care in many national treatment programs. The ubiquity of mobile phones, even in resource-constrained settings, has provided an opportunity to utilize an inexpensive, contextually feasible technology for adherence support in HIV in these settings. We aimed to assess the influence of mobile phone reminders on adherence to antiretroviral therapy in South India. Participant experiences with the intervention were also studied. This is the first report of such an intervention for antiretroviral adherence from India, a country with over 800 million mobile connections. METHODS: STUDY DESIGN: Quasi-experimental cohort study involving 150 HIV-infected individuals from Bangalore, India, who were on antiretroviral therapy between April and July 2010. The intervention: All participants received two types of adherence reminders on their mobile phones, (i an automated interactive voice response (IVR call and (ii A non-interactive neutral picture short messaging service (SMS, once a week for 6 months. Adherence measured by pill count, was assessed at study recruitment and at months one, three, six, nine and twelve. Participant experiences were assessed at the end of the intervention period. RESULTS: The mean age of the participants was 38 years, 27% were female and 90% urban. Overall, 3,895 IVRs and 3,073 SMSs were sent to the participants over 6 months. Complete case analysis revealed that the proportion of participants with optimal adherence increased from 85% to 91% patients during the intervention period, an effect that was maintained 6 months after the intervention was discontinued (p = 0.016. Both, IVR calls and SMS reminders were considered non-intrusive and not a threat to privacy. A significantly higher proportion agreed that the IVR was helpful compared to the SMS (p<0.001. CONCLUSION: Mobile phone reminders may improve

  16. Analysis of high and selective uptake of CO2 in an oxamide-containing {Cu-2(OOCR)(4)}-based metal-organic framework

    OpenAIRE

    2014-01-01

    The porous framework [Cu2(H2O)2L]⋅4 H2O⋅2 DMA (H4L=oxalylbis(azanediyl)diisophthalic acid; DMA=N,N-dimethylacetamide), denoted NOTT-125, is formed by connection of {Cu2(RCOO)4} paddlewheels with the isophthalate linkers in L4−. A single crystal structure determination reveals that NOTT-125 crystallises in monoclinic unit cell with a=27.9161(6), b=18.6627(4) and c=32.3643(8) Å, β=112.655(3)°, space group P21/c. The structure of this material shows fof topology, which can be viewed as the packi...

  17. Toxicity of Ag, CuO and ZnO nanoparticles to selected environmentally relevant test organisms and mammalian cells in vitro: a critical review.

    Science.gov (United States)

    Bondarenko, Olesja; Juganson, Katre; Ivask, Angela; Kasemets, Kaja; Mortimer, Monika; Kahru, Anne

    2013-07-01

    Nanoparticles (NPs) of copper oxide (CuO), zinc oxide (ZnO) and especially nanosilver are intentionally used to fight the undesirable growth of bacteria, fungi and algae. Release of these NPs from consumer and household products into waste streams and further into the environment may, however, pose threat to the 'non-target' organisms, such as natural microbes and aquatic organisms. This review summarizes the recent research on (eco)toxicity of silver (Ag), CuO and ZnO NPs. Organism-wise it focuses on key test species used for the analysis of ecotoxicological hazard. For comparison, the toxic effects of studied NPs toward mammalian cells in vitro were addressed. Altogether 317 L(E)C50 or minimal inhibitory concentrations (MIC) values were obtained for algae, crustaceans, fish, bacteria, yeast, nematodes, protozoa and mammalian cell lines. As a rule, crustaceans, algae and fish proved most sensitive to the studied NPs. The median L(E)C50 values of Ag NPs, CuO NPs and ZnO NPs (mg/L) were 0.01, 2.1 and 2.3 for crustaceans; 0.36, 2.8 and 0.08 for algae; and 1.36, 100 and 3.0 for fish, respectively. Surprisingly, the NPs were less toxic to bacteria than to aquatic organisms: the median MIC values for bacteria were 7.1, 200 and 500 mg/L for Ag, CuO and ZnO NPs, respectively. In comparison, the respective median L(E)C50 values for mammalian cells were 11.3, 25 and 43 mg/L. Thus, the toxic range of all the three metal-containing NPs to target- and non-target organisms overlaps, indicating that the leaching of biocidal NPs from consumer products should be addressed.

  18. Band selection and disentanglement using maximally localized Wannier functions: the cases of Co impurities in bulk copper and the Cu(111) surface

    Energy Technology Data Exchange (ETDEWEB)

    Korytar, Richard; Pruneda, Miguel; Ordejon, Pablo; Lorente, Nicolas [Centre d' Investigacio en Nanociencia i Nanotecnologia (CSIC-ICN), Campus de la UAB, E-08193 Bellaterra (Spain); Junquera, Javier, E-mail: rkorytar@cin2.e [Departamento de Ciencias de la Tierra y Fisica de la Materia Condensada, Universidad de Cantabria, E-39005 Santander (Spain)

    2010-09-29

    We have adapted the maximally localized Wannier function approach of Souza et al (2002 Phys. Rev. B 65 035109) to the density functional theory based SIESTA code (Soler et al 2002 J. Phys.: Condens. Mater. 14 2745) and applied it to the study of Co substitutional impurities in bulk copper as well as to the Cu(111) surface. In the Co impurity case, we have reduced the problem to the Co d-electrons and the Cu sp-band, permitting us to obtain an Anderson-like Hamiltonian from well defined density functional parameters in a fully orthonormal basis set. In order to test the quality of the Wannier approach to surfaces, we have studied the electronic structure of the Cu(111) surface by again transforming the density functional problem into the Wannier representation. An excellent description of the Shockley surface state is attained, permitting us to be confident in the application of this method to future studies of magnetic adsorbates in the presence of an extended surface state.

  19. Synthesis and kinetics investigation of meso-microporous Cu-SAPO-34 catalysts for the selective catalytic reduction of NO with ammonia.

    Science.gov (United States)

    Liu, Jixing; Yu, Fuhong; Liu, Jian; Cui, Lifeng; Zhao, Zhen; Wei, Yuechang; Sun, Qianyao

    2016-10-01

    A series of meso-microporous Cu-SAPO-34 catalysts were successfully synthesized by a one-pot hydrothermal crystallization method, and these catalysts exhibited excellent NH3-SCR performance at low temperature. Their structure and physic chemical properties were characterized by means of X-ray diffraction patterns (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), N2 sorption-desorption, nuclear magnetic resonance (NMR), Inductively Coupled Plasma-Atomic Emission spectrometer (ICP-AES), X-ray absorption spectroscopy (XPS), Temperature-programmed desorption of ammonia (NH3-TPD), Ultraviolet visible diffuse reflectance spectroscopy (UV-Vis DRS) and Temperature programmed reduction (TPR). The analysis results indicate that the high activities of Cu-SAPO-34 catalysts could be attributed to the enhancement of redox property, the formation of mesopores and the more acid sites. Furthermore, the kinetic results verify that the formation of mesopores remarkably reduces diffusion resistance and then improves the accessibility of reactants to catalytically active sites. The 1.0-Cu-SAPO-34 catalyst exhibited the high NO conversion (>90%) among the wide activity temperature window in the range of 150-425°C.

  20. Keeping participants on board: increasing uptake by automated respondent reminders in an Internet-based Chlamydia Screening in the Netherlands

    Directory of Open Access Journals (Sweden)

    Dokkum Nynke FB

    2012-03-01

    Full Text Available Abstract Background Effectiveness of Chlamydia screening programs is determined by an adequate level of participation and the capturing of high-risk groups. This study aimed to evaluate the contribution of automated reminders by letter, email and short message service (SMS on package request and sample return in an Internet-based Chlamydia screening among people aged 16 to 29 years in the Netherlands. Methods Individuals not responding to the invitation letter received a reminder letter after 1 month. Email- and SMS-reminders were sent to persons who did not return their sample. It was examined to what extent reminders enhanced the response rate (% of package requests and participation rate (% of sample return. Sociodemographic and behavioural correlates of providing a cell phone number and participation after the reminder(s were studied by logistic regression models. Results Of all respondents (screening round 1: 52,628, round 2: 41,729, 99% provided an email address and 72% a cell phone number. Forty-two percent of all package requests were made after the reminder letter. The proportion of invitees returning a sample increased significantly from 10% to 14% after email/SMS reminders (round 2: from 7% to 10%. Determinants of providing a cell-phone number were younger age (OR in 25-29 year olds versus 16-19 year olds = 0.8, 95%CI 0.8-0.9, non-Dutch (OR in Surinam/Antillean versus Dutch = 1.3, 95%CI 1.2-1.4, Turkish/Moroccan: 1.1, 95%CI 1.0-1.2, Sub Sahara African: 1.5, 95%CI 1.3-1.8, non-Western other 1.1, 95%CI 1.1-1.2, lower educational level (OR in high educational level versus low level = 0.8, 95%CI 0.7-0.9, no condom use during the last contact with a casual partner (OR no condom use versus condom use 1.2, 95%CI 1.1-1.3, younger age at first sexual contact (OR 19 years or older versus younger than 16: 0.7, 95%CI 0.6-0.8. Determinants for requesting a test-package after the reminder letter were male gender (OR female versus male 0.9 95%CI 0

  1. Using Olfaction and Unpleasant Reminders to Reduce the Intention-behavior Gap in Hand Washing.

    Science.gov (United States)

    Pellegrino, Robert; Crandall, Philip G; Seo, Han-Seok

    2016-01-06

    Lack of hand washing is a leading cause of food borne illnesses. To successfully increase hand hygiene compliance, interventions must have continual engagement with employees. This study used a real-time prospective memory (PM) scenario to measure the effectiveness of a control and sensory reminders of disgust to influence hand washing behavior and performance. First, a model of hand washing performance was built by having six participants' hands contaminated with GermGlo (a florescent micro-particle) and then washed their hands using predetermined protocols while monitored by an electronic hand hygiene verification (HHV) system. Next, eighty Hispanic/Latino participants, in a between-group experimental design, performed a PM experiment while one of four reminders were present (hand washing poster, disgusting image, disgusting sound, and disgusting odor) as the HHV recorded their hand washing performance. Visual cues, typical of hand washing campaigns, were not as effective at increasing hand hygiene compliance as disgust-induced sensory cues. Furthermore, olfactory disgust showed a significantly higher probability that individuals would engage in hand washing behaviors than all other conditions. This study provides new insight into the effectiveness of different senses and emotion to reduce the intention-behavior gap associated with modifying behaviors, and broadens current PM research to a real-time application.

  2. Retaining Homeless Veterans in Outpatient Care: A Pilot Study of Mobile Phone Text Message Appointment Reminders

    Science.gov (United States)

    Petrakis, Beth Ann; Gifford, Allen L.; Rao, Sowmya R.; Houston, Thomas K.; Asch, Steven M.; O’Toole, Thomas P.

    2014-01-01

    Objectives. We examined the feasibility of using mobile phone text messaging with homeless veterans to increase their engagement in care and reduce appointment no-shows. Methods. We sent 2 text message reminders to participants (n = 20) before each of their outpatient appointments at an urban Veterans Affairs medical center. Evaluation included pre- and postsurvey questionnaires, open-ended questions, and review of medical records. We estimated costs and savings of large-scale implementation. Results. Participants were satisfied with the text-messaging intervention, had very few technical difficulties, and were interested in continuing. Patient-cancelled visits and no-shows trended downward from 53 to 37 and from 31 to 25, respectively. Participants also experienced a statistically significant reduction in emergency department visits, from 15 to 5 (difference of 10; 95% confidence interval [CI]  = 2.2, 17.8; P = .01), and a borderline significant reduction in hospitalizations, from 3 to 0 (difference of 3; 95% CI = −0.4, 6.4; P = .08). Conclusions. Text message reminders are a feasible means of reaching homeless veterans, and users consider it acceptable and useful. Implementation may reduce missed visits and emergency department use, and thus produce substantial cost savings. PMID:25100425

  3. Key beliefs of hospital nurses' hand-hygiene behaviour: protecting your peers and needing effective reminders.

    Science.gov (United States)

    White, Katherine M; Jimmieson, Nerina L; Graves, Nicholas; Barnett, Adrian; Cockshaw, Wendell; Gee, Phillip; Page, Katie; Campbell, Megan; Martin, Elizabeth; Brain, David; Paterson, David

    2015-04-01

    Hand hygiene in hospitals is vital to limit the spread of infections. This study aimed to identify key beliefs underlying hospital nurses' hand-hygiene decisions to consolidate strategies that encourage compliance. Informed by a theory of planned behaviour belief framework, nurses from 50 Australian hospitals (n=797) responded to how likely behavioural beliefs (advantages and disadvantages), normative beliefs (important referents) and control beliefs (barriers) impacted on their hand-hygiene decisions following the introduction of a national '5 moments for hand hygiene' initiative. Two weeks after completing the survey, they reported their hand-hygiene adherence. Stepwise regression analyses identified key beliefs that determined nurses' hand-hygiene behaviour. Reducing the chance of infection for co-workers influenced nurses' hygiene behaviour, with lack of time and forgetfulness identified as barriers. Future efforts to improve hand hygiene should highlight the potential impact on colleagues and consider strategies to combat time constraints, as well as implementing workplace reminders to prompt greater hand-hygiene compliance. SO WHAT?: Rather than emphasising the health of self and patients in efforts to encourage hand-hygiene practices, a focus on peer protection should be adopted and more effective workplace reminders should be implemented to combat forgetting.

  4. Reducing drug–herb interaction risk with a computerized reminder system

    Science.gov (United States)

    Lin, Sheng-Shing; Tsai, Chiu-Lin; Tu, Ching-Yeh; Hsieh, Ching-Liang

    2015-01-01

    Background Traditional Chinese medicine (TCM) and Western medicine are both popular in Taiwan. Approximately 14.1% of Taiwanese residents use Western drugs and Chinese herbs concurrently; therefore, drug–herb interaction is critical to patient safety. This paper presents a new procedure for reducing the risk of drug interactions. Methods Hospital computer systems are modified to ensure that drug–herb interactions are automatically detected when a TCM practitioner is writing a prescription. A pop-up reminder appears, warning of interactions, and the practitioner may adjust doses, delete herbs, or leave the prescription unchanged. A pharmacist will receive interaction information through the system and provide health education to the patient. Results During the 2011–2013 study period, 256 patients received 891 herbal prescriptions with potential drug–herb interactions. Three of the 50 patients who concurrently used ginseng and antidiabetic drugs manifested hypoglycemia (fasting blood sugar level ≤70 mg/dL). Conclusion Drug–herb interactions can cause adverse reactions. A computerized reminder system can enable TCM practitioners to reduce the risk of drug–herb interactions. In addition, health education for patients is crucial in avoiding adverse reaction by the interactions. PMID:25733840

  5. Vaccines4Kids: Assessing the impact of text message reminders on immunization rates in infants.

    Science.gov (United States)

    Niederhauser, Victoria; Johnson, Melissa; Tavakoli, Abbas S

    2015-06-12

    The purpose of this study was to examine the effect text messages (TM) immunization reminders have on immunization rates in the first 7 months of life. This randomized-control trial enrolled 57 parent/infant dyads and had a 74% completion rate (43) at the end of the study period. The study was approved by Committee on Human Subjects at the University of Hawaii Institutional Board Review. All participants completed a demographics form and a Barriers to Immunization Survey (SHOTS survey) at the start and end of the study. Parents received TM at 4, 7, 12, 15, 20, & 23 weeks of child's age. The intervention group received immunization reminders and the control group received healthy baby messages. In the overall mixed model, between enrollment and 7 months of age, the barriers to immunizations decreased for all parents significantly. There were no significant differences in immunization rates between groups at 7 months of age. Positive responses from regarding TM interventions show this is a promising intervention, but further research is required regarding how to address behavior change and motivation for health prevention behaviors with TM. Copyright © 2015 Elsevier Ltd. All rights reserved.

  6. Design of an Electronic Reminder System for Supporting the Integerity of Nursing Records.

    Science.gov (United States)

    Chen, Chien-Min; Hou, I-Ching; Chen, Hsiao-Ping; Weng, Yung-Ching

    2016-01-01

    The integrity of electronic nursing records (ENRs) stands for the quality of medical records. But patients' conditions are varied (e.g. not every patient had wound or need fall prevention), to achieve the integrity of ENRs depends much on clinical nurses' attention. Our study site, an one 2,300-bed hospital in northern Taiwan, there are a total of 20 ENRs including nursing assessments, nursing care plan, discharge planning etc. implemented in the whole hospital before 2014. It become important to help clinical nurses to decrease their human recall burden to complete these records. Thus, the purpose of this study was to design an ENRs reminder system (NRS) to facilitate nursing recording process. The research team consisted of an ENR engineer, a clinical head nurse and a nursing informatics specialist began to investigate NRS through three phases (e.g. information requirements; design and implementation). In early 2014, a qualitative research method was used to identify NRS information requirements through both groups (e.g. clinical nurses and their head nurses) focus interviews. According to the their requirements, one prototype was created by the nursing informatics specialist. Then the engineer used Microsoft Visual Studio 2012, C#, and Oracle to designed a web-based NRS (Figure 1). Then the integrity reminder system which including a total of twelve electronic nursing records was designed and the preliminary accuracy validation of the system was 100%. NRS could be used to support nursing recording process and prepared for implementing in the following phase.

  7. Differential Left Hippocampal Activation during Retrieval with Different Types of Reminders: An fMRI Study of the Reconsolidation Process

    Science.gov (United States)

    De Pino, Gabriela; Fernández, Rodrigo Sebastián; Villarreal, Mirta Fabiana; Pedreira, María Eugenia

    2016-01-01

    Consolidated memories return to a labile state after the presentation of cues (reminders) associated with acquisition, followed by a period of stabilization (reconsolidation). However not all cues are equally effective in initiating the process, unpredictable cues triggered it, predictable cues do not. We hypothesize that the different effects observed by the different reminder types on memory labilization-reconsolidation depend on a differential neural involvement during reminder presentation. To test it, we developed a declarative task and compared the efficacy of three reminder types in triggering the process in humans (Experiment 1). Finally, we compared the brain activation patterns between the different conditions using functional magnetic resonance imaging (fMRI) (Experiment 2). We confirmed that the unpredictable reminder is the most effective in initiating the labilization-reconsolidation process. Furthermore, only under this condition there was differential left hippocampal activation during its presentation. We suggest that the left hippocampus is detecting the incongruence between actual and past events and allows the memory to be updated. PMID:26991776

  8. Strategic use of reminders: Influence of both domain-general and task-specific metacognitive confidence, independent of objective memory ability.

    Science.gov (United States)

    Gilbert, Sam J

    2015-05-01

    How do we decide whether to use external artifacts and reminders to remember delayed intentions, versus relying on unaided memory? Experiment 1 (N=400) showed that participants' choice to forgo reminders in an experimental task was independently predicted by subjective confidence and objective ability, even when the two measures were themselves uncorrelated. Use of reminders improved performance, explaining significant variance in intention fulfilment even after controlling for unaided ability. Experiment 2 (N=303) additionally investigated a pair of unrelated perceptual discrimination tasks, where the confidence and sensitivity of metacognitive judgments was decorrelated from objective performance using a staircase procedure. Participants with lower confidence in their perceptual judgments set more reminders in the delayed-intention task, even though confidence was unrelated to objective accuracy. However, memory confidence was a better predictor of reminder setting. Thus, propensity to set reminders was independently influenced by (a) domain-general metacognitive confidence; (b) task-specific confidence; and (c) objective ability.

  9. Bimetallic AgCu/Cu2O hybrid for the synergetic adsorption of iodide from solution.

    Science.gov (United States)

    Mao, Ping; Liu, Ying; Liu, Xiaodong; Wang, Yuechan; Liang, Jie; Zhou, Qihang; Dai, Yuexuan; Jiao, Yan; Chen, Shouwen; Yang, Yi

    2017-08-01

    To further improve the capacity of Cu2O to absorb I(-) anions from solution, and to understand the difference between the adsorption mechanisms of Ag/Cu2O and Cu/Cu2O adsorbents, bimetallic AgCu was doped into Cu2O through a facile solvothermal route. Samples were characterized and employed to adsorb I(-) anions under different experimental conditions. The results show that the Cu content can be tuned by adding different volumes of Ag sols. After doping bimetallic AgCu, the adsorption capacity of the samples can be increased from 0.02 mmol g(-1) to 0.52 mmol g(-1). Moreover, the optimal adsorption is reached within only 240 min. Meanwhile, the difference between the adsorption mechanisms of Ag/Cu2O and Cu/Cu2O adsorbents was verified, and the cooperative adsorption mechanism of the AgCu/Cu2O hybrid was proposed and verified. In addition, the AgCu/Cu2O hybrid showed excellent selectivity, e.g., its adsorption efficiencies are 85.1%, 81.9%, 85.9% and 85.7% in the presence of the Cl(-), CO3(2-), SO4(2-) and NO3(-) competitive anions, respectively. Furthermore, the AgCu/Cu2O hybrid can worked well in other harsh environments (e.g., acidic, alkaline and seawater environments). Therefore, this study is expected to promote the development of Cu2O into a highly efficient adsorbent for the removal of iodide from solution. Copyright © 2017 Elsevier Ltd. All rights reserved.

  10. Interfacial Reaction of Sn-Ag-Cu Lead-Free Solder Alloy on Cu: A Review

    Directory of Open Access Journals (Sweden)

    Liu Mei Lee

    2013-01-01

    Full Text Available This paper reviews the function and importance of Sn-Ag-Cu solder alloys in electronics industry and the interfacial reaction of Sn-Ag-Cu/Cu solder joint at various solder forms and solder reflow conditions. The Sn-Ag-Cu solder alloys are examined in bulk and in thin film. It then examines the effect of soldering conditions to the formation of intermetallic compounds such as Cu substrate selection, structural phases, morphology evolution, the growth kinetics, temperature and time is also discussed. Sn-Ag-Cu lead-free solder alloys are the most promising candidate for the replacement of Sn-Pb solders in modern microelectronic technology. Sn-Ag-Cu solders could possibly be considered and adapted in miniaturization technologies. Therefore, this paper should be of great interest to a large selection of electronics interconnect materials, reliability, processes, and assembly community.

  11. Cu-Cr Literature Review

    Energy Technology Data Exchange (ETDEWEB)

    Need, Ryan F. [Los Alamos National Laboratory

    2012-08-09

    Cu-Cr alloys are part of a class of face-centered cubic (FCC)-body-centered cubic (BCC) composites that includes similar alloys, such as Cu-Nb and Cu-Ta. When heavily deformed, these FCC-BCC materials create 'in situ' composites with a characteristic structure-nanoscale BCC filaments in a ductile FCC matrix. The strength of these composites is vastly greater than predicted by the rule of mixtures, and has been shown to be inversely proportional to the filament spacing. Lower raw materials costs suggest that Cu-Cr alloys may offer more economical solution to high-strength, high-conductivity wire than either their Nb or Ta counterparts. However, Cr is also more brittle and soluble in Cu than Nb or Ta. These qualities necessitate thermal treatments to remove solute atoms from the Cu matrix, improve conductivity, and maintain the ductility of the Cr filaments. Through the use of different thermomechanical processing routes or the addition of select dopants, alloys with strength in excess of 1 GPa at 70% IACS have been achieved. To date, previous research on Cu-Cr alloys has focused on a relatively small number of alloy compositions and processing methods while the effects of dopants and ageing treatments have only been studied independently. Consequently, there remains considerable opportunity for the development and optimization of these alloys as a leading high-strength, high-conductivity material.

  12. The concentration and distribution of selected heavy metals (Pb, Cd, Cu and Zn) in soils collected from the rice fields of MADA in Kedah, Malaysia

    Science.gov (United States)

    Alrawiq, Nasser; Khairiah, J.; Latif, T. M.; Ismail, S. B.

    2013-11-01

    The present study was carried out to determine the concentration and distribution status of some heavy metals (Pb, Cd, Cu and Zn) in the paddy field soil fractions of MADA in the state of Kedah, Malaysia. Five replicate samples were randomly collected from five paddy fields in the MADA area of Jitra. The heavy metals in the soil were extracted using sequential extraction method that was presented by Badri and Aston [1], which consisted of four different fractions using different reagents. The first fraction of extraction is the easily leachable and freely exchangeable fraction (ELFE), which uses ammonium acetate (NH4CH3COO). The second fraction is acid reduction fraction (AR), which uses hydroxylamine chloride (NH2OH_HCl), while the third fraction of extraction called the organic oxidation fraction (OO) was carried out using the combination of hydrogen peroxide (H2O2), and ammonium acetate (NH4CH3COO). The last fraction called the resistant fraction uses concentrated nitrate acid (HNO3) and perchlorate acid (HClO4). Generally, all the paddy soils in this study contained low levels of Pb, Cd, Cu and Zn concentration compared to the other paddy soils. The result showed that the concentration of heavy metals in the studied area was in the following decreasing order i.e.: Pb < Zn < Cu < Cd. The results also showed that the concentration of heavy metals in the paddy soil fractions were mainly concentrated in the RR fraction except for Pb, which was at the highest level in the OO fraction, whilst Cd was more evenly distributed throughout the whole soil fraction. In general, Pb was the highest metal concentration found in the OO fraction followed by Zn in the RR fraction of the soil fractions.

  13. The impact of text message reminders on adherence to antimalarial treatment in northern Ghana: a randomized trial.

    Science.gov (United States)

    Raifman, Julia R G; Lanthorn, Heather E; Rokicki, Slawa; Fink, Günther

    2014-01-01

    Low rates of adherence to artemisinin-based combination therapy (ACT) regimens increase the risk of treatment failure and may lead to drug resistance, threatening the sustainability of current anti-malarial efforts. We assessed the impact of text message reminders on adherence to ACT regimens. Health workers at hospitals, clinics, pharmacies, and other stationary ACT distributors in Tamale, Ghana provided flyers advertising free mobile health information to individuals receiving malaria treatment. The messaging system automatically randomized self-enrolled individuals to the control group or the treatment group with equal probability; those in the treatment group were further randomly assigned to receive a simple text message reminder or the simple reminder plus an additional statement about adherence in 12-hour intervals. The main outcome was self-reported adherence based on follow-up interviews occurring three days after treatment initiation. We estimated the impact of the messages on treatment completion using logistic regression. 1140 individuals enrolled in both the study and the text reminder system. Among individuals in the control group, 61.5% took the full course of treatment. The simple text message reminders increased the odds of adherence (adjusted OR 1.45, 95% CI [1.03 to 2.04], p-value 0.028). Receiving an additional message did not result in a significant change in adherence (adjusted OR 0.77, 95% CI [0.50 to 1.20], p-value 0.252). The results of this study suggest that a simple text message reminder can increase adherence to antimalarial treatment and that additional information included in messages does not have a significant impact on completion of ACT treatment. Further research is needed to develop the most effective text message content and frequency. ClinicalTrials.gov NCT01722734.

  14. The impact of text message reminders on adherence to antimalarial treatment in northern Ghana: a randomized trial.

    Directory of Open Access Journals (Sweden)

    Julia R G Raifman

    Full Text Available BACKGROUND: Low rates of adherence to artemisinin-based combination therapy (ACT regimens increase the risk of treatment failure and may lead to drug resistance, threatening the sustainability of current anti-malarial efforts. We assessed the impact of text message reminders on adherence to ACT regimens. METHODS: Health workers at hospitals, clinics, pharmacies, and other stationary ACT distributors in Tamale, Ghana provided flyers advertising free mobile health information to individuals receiving malaria treatment. The messaging system automatically randomized self-enrolled individuals to the control group or the treatment group with equal probability; those in the treatment group were further randomly assigned to receive a simple text message reminder or the simple reminder plus an additional statement about adherence in 12-hour intervals. The main outcome was self-reported adherence based on follow-up interviews occurring three days after treatment initiation. We estimated the impact of the messages on treatment completion using logistic regression. RESULTS: 1140 individuals enrolled in both the study and the text reminder system. Among individuals in the control group, 61.5% took the full course of treatment. The simple text message reminders increased the odds of adherence (adjusted OR 1.45, 95% CI [1.03 to 2.04], p-value 0.028. Receiving an additional message did not result in a significant change in adherence (adjusted OR 0.77, 95% CI [0.50 to 1.20], p-value 0.252. CONCLUSION: The results of this study suggest that a simple text message reminder can increase adherence to antimalarial treatment and that additional information included in messages does not have a significant impact on completion of ACT treatment. Further research is needed to develop the most effective text message content and frequency. TRIAL REGISTRATION: ClinicalTrials.gov NCT01722734.

  15. Interfacial Reaction of Sn-Ag-Cu Lead-Free Solder Alloy on Cu: A Review

    OpenAIRE

    Liu Mei Lee; Ahmad Azmin Mohamad

    2013-01-01

    This paper reviews the function and importance of Sn-Ag-Cu solder alloys in electronics industry and the interfacial reaction of Sn-Ag-Cu/Cu solder joint at various solder forms and solder reflow conditions. The Sn-Ag-Cu solder alloys are examined in bulk and in thin film. It then examines the effect of soldering conditions to the formation of intermetallic compounds such as Cu substrate selection, structural phases, morphology evolution, the growth kinetics, temperature and time is also disc...

  16. Concentrations of selected heavy metals in bryophyte tissues at Cu-mine heap Podlipa in Ľubietová (Central Slovakia)

    Science.gov (United States)

    Širka, Pavel; Midula, Pavol

    2017-04-01

    Mine heaps and wastes created by mining industry belong to one of the most extreme man-made habitat types. In addition to their specific microclimatic conditions mine heaps are also characterized by increased contents of heavy metals and toxic substances in the soil substrate. These substances are transported into plant bodies and create difficult conditions for their growth. However, there are some plants that can cope with extremely high metal contents and are capable of growing on metalliferous habitats. These plants develop unique adaptation mechanisms and basically represent modified ecotypes with specific tolerances to certain heavy metals adapted through microevolutionary processes. The toxic effects of heavy metals on vascular plants are known for quite a long time, however, bryophytes are also known to accumulate certain heavy metals without any visible signs of damage. Because of this ability they have been successfully used in biomonitoring. Chemical analysis of contaminants in samples of bryophytes can reflect the state of environmental pollution. The aim of this work was to analyze the concentrations of 6 heavy metals (Fe, Cu, Zn, Mn, Pb and Cd) in tissues of 16 bryophyte samples at an abandoned Cu deposit Podlipa in Ľubietová and to compare them with concentrations of these elemens in soil samples and 9 vascular plant species (belonging to different growth forms) in a research performed by Andráš et al. (2014) in the studied area. Bryophytes were collected at 10 sampling sites randomly chosen in the dump-field area and consist of 14 different moss species. Only above-ground parts of bryophyte thalli (separated from rhizoids, gravel, soil, needles etc.) were used for analysis. Samples were dried at room temperature and subjected to microwave mineralization (MWS - 2 Berghof). The detailed procedure is defined in the Application Report MWS - 2 / Food, Pharma, Cosmetics (Berghof). In order to determine the concentrations of studied elements, atomic

  17. Why love has wings and sex has not: how reminders of love and sex influence creative and analytic thinking.

    Science.gov (United States)

    Förster, Jens; Epstude, Kai; Ozelsel, Amina

    2009-11-01

    This article examines cognitive links between romantic love and creativity and between sexual desire and analytic thought based on construal level theory. It suggests that when in love, people typically focus on a long-term perspective, which should enhance holistic thinking and thereby creative thought, whereas when experiencing sexual encounters, they focus on the present and on concrete details enhancing analytic thinking. Because people automatically activate these processing styles when in love or when they experience sex, subtle or even unconscious reminders of love versus sex should suffice to change processing modes. Two studies explicitly or subtly reminded participants of situations of love or sex and found support for this hypothesis.

  18. Three luminescent d{sup 10} metal coordination polymers assembled from a semirigid V-shaped ligand with high selective detecting of Cu{sup 2+} ion and nitrobenzene

    Energy Technology Data Exchange (ETDEWEB)

    Wu, Wei-Ping [Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, Shaanxi Key Laboratory of Physico-Inorg. Chem., College of Chemistry & Materials Science, Northwest University, Xi’an 710069 (China); Institute of Functional Materials, College of Chemistry and Pharmaceutical Engineering, Sichuan University of Science & Engineering, Zigong 643000 (China); Liu, Ping; Liang, Yu-Tong; Cui, Lin; Xi, Zheng-Ping [Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, Shaanxi Key Laboratory of Physico-Inorg. Chem., College of Chemistry & Materials Science, Northwest University, Xi’an 710069 (China); Wang, Yao-Yu, E-mail: wyaoyu@nwu.edu.cn [Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education, Shaanxi Key Laboratory of Physico-Inorg. Chem., College of Chemistry & Materials Science, Northwest University, Xi’an 710069 (China)

    2015-08-15

    Three 2D luminescent coordination polymers with helical frameworks, [ZnL{sub 2}]{sub n} (1) and ([ML{sub 2}]·(H{sub 2}O)){sub n} (M=Zn (2), Cd (3)) (HL=4-((2-methyl-1 H-imidazol-1-yl)methyl)benzoic acid), have been assembled under hydro(solvo)thermal conditions. Complex 1 is in chiral space group and displays a rare 2D→2D 2-fold parallel interpenetrated layer network with two types of chiral double helixes. Interestingly, the single crystal structure analyses indicate the coexistence of enantiomers la and 1b in one pot, while the bulk crystallization of 1 are racemic mixtures based on the CD measurement. 2 and 3 are isostructural, in the structure, there are two kinds of 2D chiral helical-layers which stack in an -ABAB- sequence leading to the overall structure are mesomer and achiral. All compounds display intense luminescence in solid state at room temperature with high chemical and thermal stability. More importantly, 1 has been successfully applied in the detection of Cu{sup 2+} ions in aqueous media and nitrobenzene and the probable detecting mechanism was also discussed. - Graphical abstract: Three luminescent d{sup 10} metal coordination polymers with helical-layer based on 4-((2-methyl-1H-imidazol-1-yl)methyl)benzoic acid have been obtained. Compound 1 shows high selective detecting for Cu{sup 2+} ion in aqueous and nitrobenzene. - Highlights: • Three coordination polymers with chiral helical-layer have been obtained. • 1 Can luminescent detect Cu{sup 2+} ion in aqueous media and nitrobenzene. • Racemic mixture or mesomer compounds can be obtained by controlling the reaction conditions.

  19. Impact of sending email reminders of the legal requirement for posting results on ClinicalTrials.gov: cohort embedded pragmatic randomized controlled trial.

    Science.gov (United States)

    Maruani, Annabel; Boutron, Isabelle; Baron, Gabriel; Ravaud, Philippe

    2014-09-19

    To evaluate the impact of sending an email to responsible parties of completed trials that do not comply with the Food and Drug Administration Amendments Act 801 legislation, to remind them of the legal requirement to post results. Cohort embedded pragmatic randomized controlled trial. Trials registered on ClinicalTrials.gov. 190 out of 379 trials randomly selected by computer generated randomization list to receive the intervention (personalized emails structured as a survey and sent by one of us to responsible parties of the trials, indirectly reminding them of the legal requirement and potential penalties for non-compliance). The primary outcome was the proportion of results posted on ClinicalTrials.gov at three months. The secondary outcome was the proportion posted at six months. In a second step, two assessors blinded to the intervention group collected the date of the first results being received on ClinicalTrials.gov. A post hoc sensitivity analysis excluding trials wrongly included was performed. Among 379 trials included, 190 were randomized to receive the email intervention. The rate of posting of results did not differ at three months between trials with or without the intervention: 36/190 (19%) v 24/189 (13%), respectively (relative risk 1.5, 95% confidence interval 0.9 to 2.4, P=0.096) but did at six months: 46/190 (24%) v 27/189 (14%), 1.7, 1.1 to 2.6, P=0.014. In the sensitivity analysis, which excluded 48/379 trials (13%), 26/190 (14%) and 22/189 (12%), respectively, results were significant at three months (relative risk 5.1, 1.1 to 22.9, P=0.02) and at six months (4.1, 1.3 to 10.6, P=0.001). Sending email reminders about the FDA's legal requirement to post results at ClinicalTrials.gov improved significantly the posting rate at six months but not at three months.Trial registration ClinicalTrials.gov NCT01658254. © Maruani et al 2014.

  20. Reminder by SC/ME to those in charge of first-aid boxes

    CERN Document Server

    2006-01-01

    The Medical Service wishes to remind all those in charge of first-aid boxes that: the contents of the boxes must be checked at least once a month to ensure that all the medication and materials are available for immediate use at all times and that none of the medication has exceeded its expiry date. in the event of termination of their contract with CERN, they must inform the Medical Service accordingly, indicating the name of their designated successor. NB: The medication and materials provided in the boxes are for occasional use only and must not be used for the regular treatment of personal medical conditions. Those requiring such regular treatment should contact the Infirmary in Building 57 R.004 - Tel. 73802

  1. Reminder by SC/ME to those in charge of first-aid boxes

    CERN Multimedia

    2006-01-01

    The Medical Service wishes to remind all those in charge of first-aid boxes that: the contents of the boxes must be checked at least once a month to ensure that all the medication and materials are available for immediate use at all times and that none of the medication has exceeded its expiry date; in the event of termination of their contract with CERN, they must inform the Medical Service accordingly, indicating the name of their designated successor. NB: The medication and materials provided in the boxes are for OCCASIONAL USE ONLY and must not be used for the regular treatment of personal medical conditions. Those requiring such regular treatment should contact the Infirmary in Building 57 R.004 - Tel. 73802

  2. A painful reminder: the role of level and salience of attitude importance in cognitive dissonance.

    Science.gov (United States)

    Starzyk, Katherine B; Fabrigar, Leandre R; Soryal, Ashley S; Fanning, Jessie J

    2009-01-01

    In his seminal book, L. Festinger (1957) emphasized the role of attitude importance in cognitive dissonance. This study (N = 308) explored whether people's use of dissonance reduction strategies differs as a function of level of attitude importance and whether the personal importance of an attitude is salient. Results showed that level and salience of attitude importance interacted to affect high-choice (HC) participants' tendency to use attitude change and trivialization to reduce dissonance. When HC participants were not reminded of the personal importance of their attitude (i.e., it was not salient), they changed their attitudes equally irrespective of attitude importance, but engaged in greater trivialization with increasing levels of importance. In contrast, when attitude importance was salient, HC participants changed their attitudes less with increasing attitude importance and showed no evidence of trivializing under any level of importance.

  3. Augmenting short cheap talk scripts with a repeated opt-out reminder in choice experiment surveys

    DEFF Research Database (Denmark)

    Ladenburg, Jacob; Olsen, Søren Bøye

    2014-01-01

    Hypothetical bias continues to be a major challenge for stated preference methods. Cheap Talk (CT) has been found to be an effective remedy in some applications, though empirical results are ambiguous. We discuss reasons why CT may fail to effectively remove specific types of hypothetical bias...... in Choice Experiments. We suggest augmenting CT in Choice Experiments with a so-called Opt-Out Reminder (OOR). Prior to each choice set, the OOR explicitly instructs respondents to choose the opt-out alternative, if they find the experimentally designed alternatives too expensive. In an empirical survey we...... find the OOR to significantly reduce total WTP and to some extent also marginal WTP beyond the capability of the CT applied without the OOR. This suggests that the CT practice should be adapted to fit the potentially different decision processes and repeated choices structure of the Choice Experiment...

  4. A configurable home care platform for monitoring patients with reminder messaging and compliance tracking services.

    Science.gov (United States)

    Capozzi, Davide; Lanzola, Giordano

    2010-01-01

    This paper illustrates a platform based on a general architecture for implementing home care services for chronic patients composed of a Remote Care Unit located at a patient's home and a Health Care Center Unit located at the treating center. The Remote Care Unit may be deployed on multiple platforms including PCs, mobile phones and even embedded devices not equipped with monitor, and may be configured to support many interoperability issues occurring among the parties involved in a health care delivery process. The platform may be tailored to match the specific issues of any chronic disease supporting either data acquisition as well as customized reminders and notifications from the center. Remote Care Unit platforms are also able to exploit multiple channels for acquiring data, including wireless links with medical devices, speech interaction and graphical user interaction. In this paper a couple of applications addressing the needs of diabetic and nephropatic patients developed on top of that platform are also introduced.

  5. Reminder of the conditions of use for CERN’s picnic areas

    CERN Multimedia

    2014-01-01

    With summer on the way, we would like to remind you of some basic rules for the use of CERN’s picnic areas. Two picnic areas are available for the organisation of CERN events: • the Meyrin barbecue area in the clubs area (9405-R-000); • the Prévessin barbecue area located near to Building 972 (9401-R-000). These areas can be reserved through Indico: • 9405-R-000; • 9401-R-000. For all events taking place at weekends or on public holidays, a list of participants must be sent to the Fire Brigade (Fire.Brigade@cern.ch) and the Access Control Service (Access.Surveillance@cern.ch) for safety reasons. A request form has been created for this purpose (available here). The same services must be informed of events organised on weekdays, but a list of participants is not required in this case. For more information, click here.

  6. Procedure for the classification of professional accidents of members of the personnel – REMINDER

    CERN Multimedia

    HR Department

    2011-01-01

    HR Department would like to remind members of the personnel that, according to the procedure for an accident deemed to be occupational and according to paragraph 29 of Administrative Circular No. 14 (Rev.2), they are requested to complete an accident declaration form (HS 50) within ten working days after the accident has occurred*). Once this deadline has passed, HR Department will be unable to proceed with the classification of the accident and, consequently, medical expenses that may arise linked to this accident will be reimbursed under the non-occupational scheme. In addition, any request for the classification of occupational accidents must be accompanied by a medical certificate detailing the bodily injuries resulting from the accident in question.   _______________ *) Or within three months of its occurrence if the victim or his beneficiaries are materially unable to meet this deadline.

  7. Reducing drug–herb interaction risk with a computerized reminder system

    Directory of Open Access Journals (Sweden)

    Lin SS

    2015-02-01

    Full Text Available Sheng-Shing Lin,1,2 Chiu-Lin Tsai,3 Ching-Yeh Tu,3 Ching-Liang Hsieh2,4,5 1Graduate Institute of Chinese Medicine, College of Chinese Medicine, China Medical University, 2Department of Chinese Medicine, China Medical University Hospital, 3Division of Chinese Medicine, Department of Pharmacy, China Medical University Hospital, 4Graduate Institute of Integrated Medicine, College of Chinese Medicine, China Medical University, 5Research Center for Chinese Medicine and Acupuncture, China Medical University, Taichung, Taiwan Background: Traditional Chinese medicine (TCM and Western medicine are both popular in Taiwan. Approximately 14.1% of Taiwanese residents use Western drugs and Chinese herbs concurrently; therefore, drug–herb interaction is critical to patient safety. This paper presents a new procedure for reducing the risk of drug interactions.Methods: Hospital computer systems are modified to ensure that drug–herb interactions are automatically detected when a TCM practitioner is writing a prescription. A pop-up reminder appears, warning of interactions, and the practitioner may adjust doses, delete herbs, or leave the prescription unchanged. A pharmacist will receive interaction information through the system and provide health education to the patient.Results: During the 2011–2013 study period, 256 patients received 891 herbal prescriptions with potential drug–herb interactions. Three of the 50 patients who concurrently used ginseng and antidiabetic drugs manifested hypoglycemia (fasting blood sugar level ≤70 mg/dL.Conclusion: Drug–herb interactions can cause adverse reactions. A computerized reminder system can enable TCM practitioners to reduce the risk of drug–herb interactions. In addition, health education for patients is crucial in avoiding adverse reaction by the interactions. Keywords: Traditional Chinese medicine, Western medicine, adverse reaction

  8. Concentrations of Mn, Fe, Cu, Zn, Cr, Cd, Pb, Ni in selected Nigerian tubers, legumes and cereals and estimates of the adult daily intakes.

    Science.gov (United States)

    Akinyele, I O; Shokunbi, O S

    2015-04-15

    This study was designed to determine the levels of microminerals (manganese (Mn), iron (Fe), copper (Cu), zinc (Zn), chromium (Cr)) and heavy metals (cadmium (Cd), lead (Pb) and nickel (Ni)) in some tubers, legumes and cereals obtained from the markets in Abeokuta city, South-West Nigeria. The food samples were digested by dry ashing procedure and their minerals were determined by atomic absorption spectrophotometer. The results show mean values of 1.67-32.00, 7.25-61.58, 1.59-10.56, 6.65-46.99, 0.02-0.58, legumes and cereals from various parts of the world. The daily intakes of the metals through tubers, legumes and cereals were found to be lower than the provisional tolerable daily intakes proposed by Joint FAO/WHO Expert Committee on Food Additives.

  9. Bond strength of W-Cu/CuCr integrated material

    Institute of Scientific and Technical Information of China (English)

    范志康; 梁淑华; 薛旭

    2001-01-01

    The bond strength of W-Cu/CuCr integrated material was investigated. The results show that the fracture of W-Cu/CuCr integrated material often takes place at W-Cu/CuCr interface. Some alloying elements enhance the bond of W and CuCr alloy, which results in the increase of the strength of the W-Cu/CuCr interface. And the fracture of the WCu/CuCr integrated material occurs in the CuCr alloy part, not at the W-Cu/CuCr interface. Chromium in CuCr alloy part of the integrated material can improve Cr diffusing from the CuCr alloy to W-Cu composite and can be alloyed (near the W-Cu/CuCr interface) in the W-Cu composite. Thus the strength of W-Cu/CuCr interface is also increased.

  10. Synthesis of s-Triazine Derivatives and Using as Colorimetric Probe for Selective Recognizing of Fe~(3+) and Cu~(2+)%均三嗪衍生物应用于Fe~(3+)和Cu~(2+)的选择性识别研究

    Institute of Scientific and Technical Information of China (English)

    张华; 刘爱红; 吴芳英

    2012-01-01

    were 1.8×104 L mol-1 and 2.6×1010 L mol-1 respectively.Meanwhile,the spectrum of compound 2 underwent distinct change when it combined with Fe3+ and the maximum absorption peak shifted from 304 nm to 357 nm.But less change was observed when it intergraded with Cu2+.The ratio of compound 2 intergraded with Fe3+ was 1∶1 and the association constants was 1.0×105 L mol-1.Therefore,we could concluded that Fe3+ combined with the ring of triazine of the compounds 1 and 2,but the Cu2+ intergraded with N atom of the methylamino of the compound 1.At the same time,the interactions of compounds 1 and 2 with other ions such as Li+,K+,Mg2+,Ca2+,Co3+,Ni2+,Ag+,Cd2+,Hg2+and Zn2+ were also investi-gated,but obvious absorption spectral changes was not observed.Thus a new kind chemosensor for Fe3+ and Cu2+with high selectivity and sensitivity was introduced.

  11. Selective hydrogenolysis of biomass-derived furfuryl alcohol into 1,2-and 1,5-pentanediol over highly dispersed Cu-Al2O3 catalysts%高分散Cu-Al2O3催化剂选择氢解生物质基糠醇制备1,2-和1,5-戊二醇

    Institute of Scientific and Technical Information of China (English)

    刘海龙; 黄志威; 康海笑; 夏春谷; 陈静

    2016-01-01

    剂上糠醇氢解的反应路径.%Cu nanoparticles supported on a variety of oxide supports, including SiO2, TiO2, ZrO2, Al2O3, MgO and ZnO, were investigated for the hydrogenolysis of biomass‐derived furfuryl alcohol to 1,2‐pentanediol and 1,5‐pentanediol. A Cu‐Al2O3 catalyst with 10 wt%Cu loading prepared by a co‐precipitation method exhibited the best performance in terms of producing pentanediols com‐pared with the other materials. This catalyst generated an 85.8%conversion and a 70.3%combined selectivity for the target pentanediols at 413 K and 8 MPa H2 over an 8‐h reaction. The catalyst could also be recycled over repeated reaction trials without any significant decrease in productivity. Characterizations with X‐ray diffraction, NH3/CO2‐temperature programmed desorption, N2 ad‐sorption, transmission electron microscopy and N2O chemisorption demonstrated that intimate and effective interactions between Cu particles and the acidic Al2O3 support in this material greatly enhanced its activity and selectivity. The promotion of the hydrogenolysis reaction was found to be especially sensitive to the Cu particle size, and the catalyst with Cu particles 1.9 to 2.4 nm in size showed the highest turnover frequency during the synthesis of pentanediols.

  12. Pop-up messages, dissociation, and craving: how monetary limit reminders facilitate adherence in a session of slot machine gambling.

    Science.gov (United States)

    Stewart, Melissa J; Wohl, Michael J A

    2013-03-01

    A failure to set and adhere to monetary limits has been implicated in the development of problematic gambling. A randomized controlled experiment (N = 59) with 2 conditions (i.e., monetary limit pop-up reminder vs. no monetary limit pop-up reminder) was conducted to assess the value of monetary limit pop-up messages in increasing adherence to self-proclaimed monetary limits. The current research also examined dissociation as a potential mechanism by which gambling symptomatology may undermine adherence to monetary limits. Results revealed that participants who received a monetary limit pop-up reminder were significantly more likely to adhere to monetary limits than participants who did not. As predicted, dissociation mediated the relationship between gambling symptomatology and adherence to monetary limits, but only among those who did not receive a monetary limit pop-up reminder. Importantly, the forced stop in play created by the pop-up message did not heighten craving to continue gambling. The efficacy of monetary limit pop-up messages as a tool to facilitate responsible gambling is discussed. (PsycINFO Database Record (c) 2013 APA, all rights reserved).

  13. A daily SMS reminder increases adherence to asthma treatment: a three-month follow-up study

    DEFF Research Database (Denmark)

    Strandbygaard, Ulla; Thomsen, Simon Francis; Backer, Vibeke

    2010-01-01

    Poor adherence to asthma treatment is a well-recognised challenge and is associated with increased morbidity, mortality and consumption of health care resources. This study examined the impact of receiving a daily text message reminder on one's cell phone on adherence to asthma treatment....

  14. Strategic use of reminders in an 'intention offloading' task: Do individuals with autism spectrum conditions compensate for memory difficulties?

    Science.gov (United States)

    Cherkaoui, Mouslim; Gilbert, Sam J

    2017-03-01

    Previous studies have found that individuals with autism spectrum conditions (ASC) can have difficulty remembering to execute delayed intentions. However, in these studies participants were prevented from setting external reminders, whereas the use of such reminders in everyday life is commonplace (e.g. calendars, to-do lists, smartphone alerts). In the present study, 28 participants with ASC and 24 matched neurotypicals performed a task requiring them to remember delayed intentions. In the first phase participants were required to use unaided memory, whereas in the second they had the option to offload their intentions by setting reminders if they wished. Performance of the ASC group was significantly poorer than the neurotypical group in phase 1, and metacognitive evaluations of memory abilities mirrored this. Nevertheless, in the second phase, the ASC group failed to compensate for impaired performance: if anything they set fewer reminders than the neurotypical group. These results indicate that intact explicit metacognitive judgements cannot be assumed to lead directly to the use of compensatory strategies.

  15. Telephone follow-up to a mail survey: when to offer an interview compared to a reminder call

    Directory of Open Access Journals (Sweden)

    Ziegenfuss Jeanette Y

    2012-03-01

    Full Text Available Abstract Background Using a different mode of contact on the final follow-up to survey non-respondents is an identified strategy to increase response rates. This study was designed to determine if a reminder phone call or a phone interview as a final mode of contact to a mailed survey works better to increase response rates and which strategy is more cost effective. Methods A randomized study was embedded within a survey study of individuals treated with ulcerative colitis conducted in March 2009 in Olmsted County, Minnesota. After two mail contacts, non-respondents were randomly assigned to either a reminder telephone call or a telephone interview. Average cost per completed interview and response rates were compared between the two experimental conditions. Results The response rate in the reminder group and the interview did not differ where we considered both a completed survey and a signed form a complete (24% vs. 29%, p = 0.08. However, if such a signed form was not required, there was a substantial advantage to completing the interview over the phone (24% vs. 43%, p Conclusions The additional cost of completing an interview is worth it when an additional signed form is not required of the respondent. However, when such a signed form is required, offering an interview instead of a reminder phone call as a follow up to non-respondents does not increase response rates enough to outweigh the additional costs.

  16. Free and Cued Memory in relation to Biomarker-Defined Abnormalities in Clinically Normal Older Adults and Those at Risk for Alzheimer’s Disease

    Science.gov (United States)

    Papp, Kathryn V.; Amariglio, Rebecca E.; Mormino, Elizabeth; Hedden, Trey; Dekhytar, Maria; Johnson, Keith A.; Sperling, Reisa A.; Rentz, Dorene M.

    2015-01-01

    Objectives Furthering our understanding of the relationship between amyloidosis (Aβ), neurodegeneration (ND), and cognition is imperative for early identification and early intervention of Alzheimer’s disease (AD). However, the subtle cognitive decline differentially associated with each biomarker-defined stage of preclinical AD has yet to be fully characterized. Recent work indicates that different components of memory performance (free and cued recall) may be differentially specific to memory decline in prodromal AD. We sought to examine the relationship between free and cued recall paradigms, in addition to global composites of memory, executive functioning, and processing speed in relation to stages of preclinical AD. Methods A total of 260 clinically normal (CN) older adults (CDR=0) from the Harvard Aging Brain study were grouped according to preclinical AD stages including Stage 0 (Aβ−/ND−), Stage 1 (Aβ+/ND−), Stage 2 (Aβ+/ND+), and suspected non-Alzheimer’s associated pathology (SNAP; Aβ−/ND+). General linear models controlling for age, sex, and education were used to assess for stage-based performance differences on cognitive composites of executive functioning, processing speed, and memory in addition to free and cued delayed recall on the Selective Reminding Test (SRT) and Memory Capacity Test (MCT). Results Global memory performance differed between preclinical stages with Stage 2 performing worse compared with Stage 0. When examining free and cued paradigms by memory test, only the MCT (and not the SRT) revealed group differences. More specifically, Stage 1 was associated with decrements in free recall compared with Stage 0 while Stage 2 was associated with decrements in both free and cued recall. There was a trend for the SNAP group to perform worse on free recall compared with Stage 0. Finally, there was no association between preclinical stage and global composites of executive functioning or processing speed. Conclusions Clinically

  17. Nanosecond laser-induced selective removal of the active layer of CuInGaSe2 solar cells by stress-assisted ablation

    Science.gov (United States)

    Buzás, András; Geretovszky, Zsolt

    2012-06-01

    We demonstrate that laser pulses of nanosecond duration (λ=1064 nm, τ=25 ns, PRR =5 kHz) are capable of the clean removal of the CuInGaSe2 (CIGS) and ZnO:Al layers in the layer structure of chalcogenide-based solar cells, leaving the underlying Mo layer undamaged and producing excellent crater morphology. Our results prove that the material removal process is governed by the thermomechanical stress developing in the CIGS layer due to rapid laser heating. In the mechanical ablation of the active layer, three phenomena play a crucial role, namely, delamination, buckling, and fracture. Morphological and compositional analysis of the laser-processed areas is used to identify the experimental parameters where clean mechanical ablation can be achieved. Numerical calculations, performed in the comsol software environment, are also presented to complement the experimental tendencies and verify the proposed model. Our calculation proves the development of a stress distribution that drives the delamination of the CIGS and Mo layers. As the delamination front proceeds radially outward, the separation of the layers ceases in the colder outer regions according to the Griffith's criterion and defines the size of the craters produced afterwards. The free-standing chalcogenide layer continues to deform, and buckling results in a growing tensile stress at the perimeter of the delaminated area, where ultimately fracture will finalize the removal process and facilitate the clean ablation of the laser-irradiated area.

  18. Effects of Hydrothermal Aging on NH3-SCR reaction over Cu/zeolites

    Energy Technology Data Exchange (ETDEWEB)

    Kwak, Ja Hun; Tran, Diana N.; Burton, Sarah D.; Szanyi, Janos; Lee, Jong H.; Peden, Charles HF

    2012-02-06

    The effects of hydrothermal treatment on model Cu/zeolite catalysts were investigated to better understand the nature of Cu species for the selective catalytic reduction of NO{sub x} by NH{sub 3}. After hydrothermal aging at 800 C for 16 h, the NO{sub x} reduction performance of Cu-ZSM-5 and Cu-beta were significantly reduced at low temperatures, while that of Cu-SSZ-13 was not affected. When the zeolite framework aluminum species were probed using solid state {sup 27}Al-NMR, significant reduction in the intensities of the tetrahedral aluminum peak was observed for Cu-ZSM-5 and Cu-beta, although no increase in the intensities of the octahedral aluminum peak was observed. When the redox behavior of Cu species was examined using H{sub 2}-TPR, it was found that Cu{sup 2+} could be reduced to Cu{sup +} and to Cu{sup 0} fir Cu-ZSM-5 and Cu-beta catalysts, while Cu{sup 2+} could be reduced to Cu{sup +} only for Cu-SSZ-13. After hydrothermal aging, CuO and Cu-aluminate species were found to form in Cu-ZSM-5 and Cu-beta, while little changes were observed for Cu-SSZ-13.

  19. Impact of online patient reminders to improve asthma care: A randomized controlled trial

    Science.gov (United States)

    Pool, Andrew C.; Kraschnewski, Jennifer L.; Poger, Jennifer M.; Smyth, Joshua; Stuckey, Heather L.; Craig, Timothy J.; Lehman, Erik B.; Yang, Chengwu; Sciamanna, Christopher N.

    2017-01-01

    Importance Asthma is one of the most burdensome chronic illnesses in the US. Despite widespread dissemination of evidence-based guidelines, more than half of the adults with asthma have uncontrolled symptoms. Objective To examine the efficacy of an online tool designed to improve asthma control. Design 12-month single blind randomized controlled trial of the online tool (Intervention condition, IC) versus an active control tool (CC). Setting Patients enrolled in an insurance plan. Participants Participants were 408 adults (21–60 years of age) with persistent asthma. Intervention At least once each month and before provider visits, participants in the IC answered questions online about their asthma symptoms, asthma medications and asthma care received from providers, such as an asthma management plan. The tool then provided tailored feedback to remind patients 1) to ask health care providers specific questions that may improve asthma control (e.g., additional controller medications) and 2) to consistently perform specific self-care behaviors (e.g., proper inhaler technique). Participants in the CC received similar questions and feedback, yet focused instead on preventive services unrelated to asthma control (e.g., cancer screening). Main outcome measures The main outcome measure was asthma control, as assessed by the 5-question Asthma Control Test (ACT). Secondary outcomes included quality of life, medication use and healthcare utilization (e.g., emergency department visits). Results After 12 months, 323 participants completed follow-up measures (79.2%). Participants in the IC reported a greater mean improvement in the ACT score than participants in the CC (2.3 vs. 1.2; p = 0.02) and 9 of 11 individual asthma control survey items showed non-significant improvements favoring the IC. No differences were observed in medication adherence, number of asthma controller medications or health care utilization. Conclusion and relevance Simple and brief online patient

  20. Diagnostic omission errors in acute paediatric practice: impact of a reminder system on decision-making

    Directory of Open Access Journals (Sweden)

    Fisher Helen

    2006-11-01

    Full Text Available Abstract Background Diagnostic error is a significant problem in specialities characterised by diagnostic uncertainty such as primary care, emergency medicine and paediatrics. Despite wide-spread availability, computerised aids have not been shown to significantly improve diagnostic decision-making in a real world environment, mainly due to the need for prolonged system consultation. In this study performed in the clinical environment, we used a Web-based diagnostic reminder system that provided rapid advice with free text data entry to examine its impact on clinicians' decisions in an acute paediatric setting during assessments characterised by diagnostic uncertainty. Methods Junior doctors working over a 5-month period at four paediatric ambulatory units consulted the Web-based diagnostic aid when they felt the need for diagnostic assistance. Subjects recorded their clinical decisions for patients (differential diagnosis, test-ordering and treatment before and after system consultation. An expert panel of four paediatric consultants independently suggested clinically significant decisions indicating an appropriate and 'safe' assessment. The primary outcome measure was change in the proportion of 'unsafe' workups by subjects during patient assessment. A more sensitive evaluation of impact was performed using specific validated quality scores. Adverse effects of consultation on decision-making, as well as the additional time spent on system use were examined. Results Subjects attempted to access the diagnostic aid on 595 occasions during the study period (8.6% of all medical assessments; subjects examined diagnostic advice only in 177 episodes (30%. Senior House Officers at hospitals with greater number of available computer workstations in the clinical area were most likely to consult the system, especially out of working hours. Diagnostic workups construed as 'unsafe' occurred in 47/104 cases (45.2%; this reduced to 32.7% following system

  1. Highly Selective Colorimetric Recognition of Copper Ions Based on N-Aryl Coumarin Methyl Ketone Thiosemicarbazone Receptors%N-芳基香豆素甲基酮缩氨基硫脲对Cu2+的选择性比色识别

    Institute of Scientific and Technical Information of China (English)

    魏太保; 李军舰; 林奇; 姚虹; 郭英; 白翠冰; 谢永强; 张有明

    2012-01-01

    设计合成了2种新型N-芳基香豆素甲基酮缩氨基硫脲受体分子S1和S2,利用紫外-可见(UV-Vis)吸收光谱考察了其对Fe3+,Hg2+,Ag+,Ca2+,Cu2+,Zn2+,Pb2+,Cd2+,Ni2+,Cr3+和Mg2+等阳离子的识别作用.结果表明,当加入Cu2+时,溶液颜色立刻由无色变为黄色,而加入其它阳离子则无变化,从而实现了对Cu2+的裸眼检测,具有专一选择性比色识别效果.通过计算可知,受体分子S2对Cu2+的络合常数大于S1,且主客体间形成1∶1的配合物.受体分子S2对Cu2+的检出限为2.0×10-7mol/L,稳定常数Ks=1.02×105 L/mol.另外,在EDTA存在时,配合物可以释放出Cu2+,与EDTA结合,表现出对Cu2+的“off-on”模式.%Two new A'-aryl coumarin methyl ketone thiosemicarbazone receptors were designed and synthesized. The binding properties of the receptors with cations such as Fe 3+ , Hg 2+ , Ag+ , Ca 2+ , Cu 2+, Zn 2+ , Pb 2+ , Cd2+, Ni2+, Cr3+ and Mg2+ in DMSO were investigated by UV-Vis spectroscopy. A clear color change from colorless to yellow was observed upon the addition of Cu 2+ to the solution of the two receptors in DMSO by naked-eyes and a single selectivity colorimetric recognition. The results showed that the two receptors had a better selectivity for Cu2+, but exhibited no evident binding with others cations. The data showed that the two receptors had different binding abilities with Cu2+. The UV-Vis data indicated that a 1 : 1 stoichiometry complex was formed between the receptor and Cu 2+. The detection limit of the sensor S2 toward Cu 2+ is 2. 0×l0~ mol/L and an association constant Ks of 1. 02×105 L/mol was measured. The sensing of Cu2+ by this sensor was found to be reversible, with the Cu2+-induced color being lost upon the addition of EDTA. The process of titrating sensor S2 with Cu2+ is reversible, and compound S2 could be used as an off-on switch chemosensor.

  2. REMINDER THE SUPPLEMENTARY CONTRIBUTION PAYABLE TO THE HEALTH INSURANCE SCHEME FOR THE SPOUSE'S COVERAGE

    CERN Multimedia

    Human Resources Division

    2001-01-01

    Staff Members and Fellows are reminded that any change in the marital status of members of the personnel, as well as any change in the spouse's income or health insurance cover, shall be notified in writing to CERN, within 30 calendar days of the change, in accordance with Article R IV 1.17 of the Staff Regulations. Such changes may have consequences on the affiliation of the spouse to the CERN Health Insurance Scheme (CHIS) or on the payment of the supplementary contribution to the CHIS for the coverage of the spouse. In the latter case, it is in the member of the personnel's interest to declare such a change as soon as possible in order that the contribution is adjusted with a minimum of backdating. To notify a change, staff members and fellows are required to fill in the form 'confidential declaration of family situation' and to send it to Mrs. Patricia Cattan (HR-SOC), indicating the effective date of the change. This form is available from divisional secretariats or from the web at the following address:...

  3. REMINDER CONCERNING THE SUPPLEMENTARY CONTRIBUTION PAYABLE TO THE HEALT INSURANCE SCHEME FOR SPOUSE COVERAGE

    CERN Multimedia

    Human Resources Division

    2002-01-01

    Staff members, fellows and pensioners are reminded that any change in the marital status of members of the personnel, as well as any change in the spouse's income or health insurance cover, shall be notified in writing to CERN, within 30 calendar days of the change, in accordance with Article R IV 1.17 of the Staff Regulations. Such changes may have consequences on the affiliation of the spouse to the CERN Health Insurance Scheme (CHIS) or on the payment of the supplementary contribution to the CHIS for the coverage of the spouse. In 2002, for the following income brackets, the indexed amounts in Swiss francs of the supplementary contribution are:   more than 30'000 CHF and up to 50'000 CHF: 134.- more than 50'000 CHF and up to 90'000 CHF: 234.- more than 90'000 CHF and up to 130'000 CHF: 369.- more than 130'000 CHF: 461.- It is in the member of the personnel's interest to declare a change in the annual income of his/her spouse as soon as possible in order to adjust contributions with the m...

  4. Use of Electronic Nurse Reminders to Improve Documentation: A Process Improvement for a Comprehensive Stroke Center.

    Science.gov (United States)

    Lear, Christy L; Walters, Cynthia

    2015-12-01

    Nurses on a neurological step-down unit were challenged to switch from documenting assessments by hand to documenting by using a highly technological, electronic format. Upon the switch to electronic documentation, it was discovered through a chart audit that neurological assessments were not being documented properly. The purpose of this project was to implement Care Organizer, an electronic nurse reminder tool, on a neurological step-down unit and to evaluate the tool's ability to assist RNs in documentation of neurological assessments. Fifty patients' charts were audited for documentation of neurological assessments. Thirty-two RNs completed an anonymous demographic survey and were provided with eight training sessions related to utilization of Care Organizer. The RNs were asked to complete an evaluation of the tool 2 weeks after training and again at 1 month after training. A second chart audit was conducted at 1 month to assess for improvement of documentation 1 month after training. Preimplementation/postimplementation chart audits revealed improvements in documentation of neurological assessments in seven of eight criteria examined. Nurses admitted discomfort with Care Organizer and verbalized concerns that it was not convenient and/or user-friendly. Most admitted that with collaboration between information technology department and nursing, the tool could be further developed to become more applicable to nurses.

  5. Latina and Black/African American Women's Perspectives on Cancer Screening and Cancer Screening Reminders.

    Science.gov (United States)

    Brandzel, Susan; Chang, Eva; Tuzzio, Leah; Campbell, Camille; Coronado, Nora; Bowles, Erin J Aiello; Bradford, Susan Carol; Buist, Diana S M

    2016-11-18

    Racial and ethnic disparities continue to exist in cancer screening rates, especially among US Latina and Black/African American populations. We conducted six focus groups among 41 women from these communities in order to better understand their preferences about cancer screening reminders and the motivators and deterrents they face in obtaining recommended breast, cervical, and colon cancer screening. Using self-reported patient race/ethnicity from electronic medical records of a large, integrated health care system in Seattle, we recruited women ages 30-60 to participate in one of five 2-hour focus groups. Using verbatim transcripts from these discussions, we conducted a qualitative analysis to identify common themes. The focus group participants were primarily strong endorsers and utilizers of recommended breast, cervical, and colon cancer screening services. Insurance and belief in preventive care were the most common motivators that they cited in obtaining cancer screening. However, they still reported multiple barriers to getting recommended cancer screening for themselves and community members, including lack of time, conflicting information about screening intervals, distrust in the health care system, and a lack of understanding of the benefits of preventive care. Efforts to improve understanding about the benefits of cancer screening, clarify cancer screening guideline recommendations, increase cultural competency among health care professionals, and expand the times and locations where cancer screening is available are all options that may improve cancer screening rates among Latinas and Black/African American women.

  6. The importance of set up time and temperature in real-time PCR; an essential reminder.

    Science.gov (United States)

    Cassidy, Hayley; MacLean, Alasdair; Gunson, Rory

    2017-05-01

    Non-specific amplification can arise in real-time PCR when temperatures are above 4°C during PCR set up. Pressure of high throughput tests, particularly in a clinical setting, can lead to short cuts being taken during PCR set up. This study set out to evaluate the outcome of exposing a real-time PCR assay to increasing durations of room temperature prior to PCR amplification. A real-time PCR assay was exposed to increasing durations of room temperature prior to PCR amplification. We found that reactions left at room temperature for 30min or more produced non-specific traces in the negative controls which could be mistaken for weak positive traces. In addition we found that the fluorescence of positive control traces was significantly reduced indicating reduced reaction efficiency, however the Ct valves were comparable between all reactions highlighting that control Ct monitoring alone would not have detected this issue. This study acts as a reminder for PCR users to set up reactions on ice/chill blocks prior to PCR amplification. Copyright © 2017 Elsevier B.V. All rights reserved.

  7. Reminders as Interactive and Embodied Tools for Socially Distributed and Situated Remembering

    Directory of Open Access Journals (Sweden)

    Lucas M Bietti

    2013-08-01

    Full Text Available Current approaches to socially distributed remembering maintain that remembering is a fluid action coordinating minds, bodies, and the physical and the social world to accomplish particular goals. That is, the act of remembering is always an active reconstruction of the past in the present. How this act of remembering unfolds is highly dynamic and malleable and is contingent on the means by which the recollection is communicated and the social and material environments in which these processes unfold. These communicative acts of remembering are always embodied, multimodal, and interactive. However, so far, little attention has been paid to the influence that the interplay of multiple behavioral channels have in collaborative remembering in small groups. The aim of this exploratory study is to demonstrate the central role that questions have as embodied and interactive tools for collaborative remembering in two small group multimodal interactions in natural settings. This study suggests that questions acting as a reminder in multimodal activities of collaborative remembering foster the formation of specific types of interactional sequences with their own temporal dynamics.

  8. Application of Technology Acceptance Model in Predicting Behavioral Intention to Use Safety Helmet Reminder System

    Directory of Open Access Journals (Sweden)

    Kamarudin Ambak

    2013-01-01

    Full Text Available Motorcycle is a common and popular mode of transportation in many developing countries. However, statistic of road accidents by the Royal Malaysian Police reveals that motorcyclists are found to be the most vulnerable road users as compared to users of other vehicles. This is due to the lack of safety protection and instability of motorcycles themselves. Despite the usefulness and effectiveness of safety helmet to prevent head injuries, majority of motorcycle users do not wear and fasten their helmet properly. This study presents a new approach in enhancing the safety of motorcycle riders through proper usage of safety helmet. The Technology Acceptance Model (TAM was adopted in predicting the behavioral intention to use Safety Helmet Reminder (SHR system towards a more proper helmet usage among motorcyclists. A multivariate analysis technique, known as Structural Equation Modeling (SEM was used in modeling exercise. Results showed that the construct variables in TAM were found to be reliable and statistically significant. The evaluation of full structural model (TAM showed the goodness-of-fit indices such as Goodness of Fit Index (GFI, Adjusted Goodness of Fit Index (AGFI, Comparative of Fit Index (CFI and Tucker Lewis Index (TLI were greater 0.9 and Root Means Square Error Approximation (RMSEA was less than 0.08. Perceived ease of use was found as strong predictors than perceived usefulness regarding behavioral intention to use SHR. In addition, this study postulates that behavioral intention to use SHR has direct effect on the proper usage of safety helmet significantly.

  9. REMINDER: SUPPLEMENTARY CONTRIBUTION PAYABLE TO THE HEALTH INSURANCE SCHEME FOR THE SPOUSE'S COVERAGE

    CERN Multimedia

    2003-01-01

    Staff Members, Fellows and Pensioners are reminded that any change in the marital status of members of the personnel, as well as any change in the spouse's income or health insurance cover, shall be notified in writing to CERN, within 30 calendar days of the change, in accordance with Article R IV 1.17 of the Staff Regulations. Such changes may have consequences on the conditions of the spouse's affiliation to the CERN Health Insurance Scheme (CHIS) or on the payment of the supplementary contribution to the CHIS for the coverage of the spouse. In 2003, for the following income brackets, the indexed amounts in Swiss francs of the supplementary contribution are : - more than 30'000 CHF and up to 50'000 CHF: 134.- - more than 50'000 CHF and up to 90'000 CHF: 234.- - more than 90'000 CHF and up to 130'000 CHF: 369.- - more than 130'000 CHF: 468.- It is in the member of the personnel's interest to declare as soon as possible a change in the annual income of his spouse in order that the contribution is adjusted w...

  10. Structural Equation Modelling in Behavioral Intention to Use Safety Helmet Reminder System

    Directory of Open Access Journals (Sweden)

    Rosli Naida

    2016-01-01

    Full Text Available Motorcycle is one of private transportation which has been widely used in many countries including Malaysia. However, motorcycles are the most dangerous form of motorized transport. Royal Malaysian Police (PDRM statistics recorded that motorcycle is the highest vehicle (45.9% involved in traffic accident compared to other vehicles. The potential cause of the death to the motorcyclist was due to the head injury. One of strategy to mitigate this problem is through proper usage of safety helmet. Therefore, this paper was introduce a new approach on motorcyclist safety by using the Technology Acceptance Model (TAM with additional determinants that contribute to behavioral intention and to increase the proper usage of safety helmets among Malaysian motorcyclists. The Structural Equation Modelling (SEM was used to test the structural TAM proposed. The evaluation for structural model showed the goodness of fit indices are excellent fit. This study found that perceived ease of use, perceived usefulness and social norm are significant towards behavioral intention to use Safety Helmet Reminder System (SHR.

  11. REMINDER Saved Leave Scheme (SLS) : Transfer of leave to saved leave accounts

    CERN Document Server

    HR Division

    2002-01-01

    Under the provisions of the voluntary saved leave scheme (SLS), a maximum total of 10 days'*) annual and compensatory leave (excluding saved leave accumulated in accordance with the provisions of Administrative Circular No. 22B) can be transferred to the saved leave account at the end of the leave year (30 September). We remind you that, since last year, unused leave of all those taking part in the saved leave scheme at the closure of the leave-year accounts is transferred automatically to the saved leave account on that date. Therefore, staff members have no administrative steps to take. In addition, the transfer, which eliminates the risk of omitting to request leave transfers and rules out calculation errors in transfer requests, will be clearly shown in the list of leave transactions that can be consulted in EDH from October 2002 onwards. Furthermore, this automatic leave transfer optimizes staff members' chances of benefiting from a saved leave bonus provided that they are still participants in the schem...

  12. Self-Organizing Wearable Device Platform for Assisting and Reminding Humans in Real Time

    Directory of Open Access Journals (Sweden)

    Yu Jin Park

    2016-01-01

    Full Text Available Most older persons would prefer “aging in my place,” that is, to remain in good health and live independently in their own home as long as possible. For assisting the independent living of older people, the ability to gather and analyze a user’s daily activity data would constitute a significant technical advance, enhancing their quality of life. However, the general approach based on centralized server has several problems such as the usage complexity, the high price of deployment and expansion, and the difficulty in identifying an individual person. To address these problems, we propose a wearable device platform for the life assistance of older persons that automatically records and analyzes their daily activity without intentional human intervention or a centralized server (i.e., cloud server. The proposed platform contains self-organizing protocols, Delay-Tolerant Messaging system, knowledge-based analysis and alerting for daily activities, and a hardware platform that provides low power consumption. We implemented a prototype smart watch, called Personal Activity Assisting and Reminding (PAAR, as a testbed for the proposed platform, and evaluated the power consumption and the service time of example scenarios.

  13. Synthesis of Cu2ZnSnS4 thin films directly onto conductive substrates via selective thermolysis using microwave energy.

    Science.gov (United States)

    Knutson, Theodore R; Hanson, Parker J; Aydil, Eray S; Penn, R Lee

    2014-06-04

    Copper zinc tin sulfide (CZTS) thin films were deposited from homogeneous solutions of precursors and directly onto conductive films via selective thermolysis by microwave heating. Microwave energy is absorbed strongly by conductive films, which enables preferential heating to a sufficiently high temperature for the deposition of CZTS exclusively on the conductive layer without homogeneous nucleation of CZTS in the liquid phase or heterogeneous nucleation of CZTS on uncoated portions of substrates.

  14. Comparison of an SMS text messaging and phone reminder to improve attendance at a health promotion center: a randomized controlled trial.

    Science.gov (United States)

    Chen, Zhou-Wen; Fang, Li-Zheng; Chen, Li-Ying; Dai, Hong-Lei

    2008-01-01

    To compare the efficacy of a short messaging service (SMS) text messaging and phone reminder to improve attendance rates at a health promotion center. A total of 1 859 participants who had scheduled appointments in the health promotion center of our hospital from April 2007 to May 2007 were enrolled in the study and randomly assigned into 3 groups: control (no reminder) group, SMS text messaging reminder group and telephone reminder group. Attendance rates and costs of interventions were collected. A total of 1848 participants were eligible for analysis. Attendance rates of control, SMS and telephone groups were 80.5%, 87.5% and 88.3%, respectively. The attendance rates were significantly higher in SMS and telephone groups than that in the control group, with odds ratio 1.698, 95% confidence interval 1.224 to 2.316, P=0.001 in the SMS group, and odds ratio 1.829, 95% confidence interval 1.333 to 2.509, Pcost effectiveness analysis showed that the cost per attendance for the SMS group (0.31 Yuan) was significantly lower than that for the telephone group (0.48 Yuan). SMS and telephone are effective reminders for improving attendance rate at a health promotion center. SMS reminder may be more cost-effective compared with the telephone reminder.

  15. Highly Active Au/δ-MoC and Cu/δ-MoC Catalysts for the Conversion of CO2: The Metal/C Ratio as a Key Factor Defining Activity, Selectivity, and Stability.

    Science.gov (United States)

    Posada-Pérez, Sergio; Ramírez, Pedro J; Evans, Jaime; Viñes, Francesc; Liu, Ping; Illas, Francesc; Rodriguez, José A

    2016-07-01

    The ever growing increase of CO2 concentration in the atmosphere is one of the main causes of global warming. Thus, CO2 activation and conversion toward valuable added compounds is a major scientific challenge. A new set of Au/δ-MoC and Cu/δ-MoC catalysts exhibits high activity, selectivity, and stability for the reduction of CO2 to CO with some subsequent selective hydrogenation toward methanol. Sophisticated experiments under controlled conditions and calculations based on density functional theory have been used to study the unique behavior of these systems. A detailed comparison of the behavior of Au/β-Mo2C and Au/δ-MoC catalysts provides evidence of the impact of the metal/carbon ratio in the carbide on the performance of the catalysts. The present results show that this ratio governs the chemical behavior of the carbide and the properties of the admetal, up to the point of being able to switch the rate and mechanism of the process for CO2 conversion. A control of the metal/carbon ratio paves the road for an efficient reutilization of this environmental harmful greenhouse gas.

  16. Web-based health care agents; the case of reminders and todos, too (R2Do2).

    Science.gov (United States)

    Silverman, B G; Andonyadis, C; Morales, A

    1998-11-01

    This paper describes efforts to develop and field an agent-based, healthcare middleware framework that securely connects practice rule sets to patient records to anticipate health todo items and to remind and alert users about these items over the web. Reminders and todos, too (R2Do2) is an example of merging data- and document-centric architectures, and of integrating agents into patient-provider collaboration environments. A test of this capability verifies that R2Do2 is progressing toward its two goals: (1) an open standards framework for middleware in the healthcare field; and (2) an implementation of the 'principle of optimality' to derive the best possible health plans for each user. This paper concludes with lessons learned to date.

  17. The efficacy of computer reminders on external quality assessment for point-of-care testing in Danish general practice

    DEFF Research Database (Denmark)

    Waldorff, Frans B; Siersma, Volkert; Ertmann, Ruth;

    2011-01-01

    BACKGROUND: Point-of-care testing (POCT) is increasingly being used in general practice to assist general practitioners (GPs) in their management of patients with diseases. However, low adherence to quality guidelines in terms of split test procedures has been observed among GPs in parts...... of the Capital Region in Denmark. Computer reminders embedded in GPs electronic medical records (ComRem) may facilitate improved quality control behaviour, but more research is needed to identify what types of reminders work and when. The overall aim of this study is to evaluate the efficacy of ComRem to improve...... GPs adherence to quality guidelines. This article describes the rationale and methods of the study that constitute this research project. METHODS/DESIGN: The study is conducted as two randomised controlled trials (RCTs) among general practices in two districts of the Capital Region in Denmark...

  18. Lifestyle Intervention Using an Internet-Based Curriculum with Cell Phone Reminders for Obese Chinese Teens: A Randomized Controlled Study

    OpenAIRE

    Abraham, Anisha A.; Wing-Chi Chow; Hung-Kwan So; Benjamin Hon-Kei Yip; Albert M Li; Kumta, Shekhar M; Jean Woo; Suk-Mei Chan; Esther Yuet-Ying Lau; E Anthony S Nelson

    2015-01-01

    Objectives Obesity is an increasing public health problem affecting young people. The causes of obesity are multi-factorial among Chinese youth including lack of physical activity and poor eating habits. The use of an internet curriculum and cell phone reminders and texting may be an innovative means of increasing follow up and compliance with obese teens. The objectives of this study were to determine the feasibility of using an adapted internet curriculum and existing nutritional progra...

  19. Lifestyle intervention using an internet-based curriculum with cell phone reminders for obese Chinese teens: a randomized controlled study.

    Directory of Open Access Journals (Sweden)

    Anisha A Abraham

    Full Text Available Obesity is an increasing public health problem affecting young people. The causes of obesity are multi-factorial among Chinese youth including lack of physical activity and poor eating habits. The use of an internet curriculum and cell phone reminders and texting may be an innovative means of increasing follow up and compliance with obese teens. The objectives of this study were to determine the feasibility of using an adapted internet curriculum and existing nutritional program along with cell phone follow up for obese Chinese teens.This was a randomized controlled study involving obese teens receiving care at a paediatric obesity clinic of a tertiary care hospital in Hong Kong. Forty-eight subjects aged 12 to 18 years were randomized into three groups. The control group received usual care visits with a physician in the obesity clinic every three months. The first intervention (IT group received usual care visits every three months plus a 12-week internet-based curriculum with cell phone calls/texts reminders. The second intervention group received usual care visits every three months plus four nutritional counselling sessions.The use of the internet-based curriculum was shown to be feasible as evidenced by the high recruitment rate, internet log-in rate, compliance with completing the curriculum and responses to phone reminders. No significant differences in weight were found between IT, sLMP and control groups.An internet-based curriculum with cell phone reminders as a supplement to usual care of obesity is feasible. Further study is required to determine whether an internet plus text intervention can be both an effective and a cost-effective adjunct to changing weight in obese youth.Chinese Clinical Trial Registry ChiCTR-TRC-12002624.

  20. The effectiveness of SMS Reminders and the impact of patient characteristics on missed appointments in a public dental outpatient clinic

    OpenAIRE

    Emilia Bellucci; Lasitha Dharmasena; Lemai Nguyen; Hanny Calache

    2017-01-01

    This paper reports on the Failure To Attend (FTA) rate of appointments as well as patients following the implementation of SMS reminders in a public dental outpatient service.  Given the ineffectiveness of the intervention and a highly representative patient’s profile, this paper identifies the demographic characteristics of patients who miss all of their appointments.  Data on appointment attendance, patient demographics and dental service type was collected over a time period of 46 consecut...

  1. Assessment of the potential impact of a reminder system on the reduction of diagnostic errors: a quasi-experimental study

    Directory of Open Access Journals (Sweden)

    Taylor Paul M

    2006-04-01

    Full Text Available Abstract Background Computerized decision support systems (DSS have mainly focused on improving clinicians' diagnostic accuracy in unusual and challenging cases. However, since diagnostic omission errors may predominantly result from incomplete workup in routine clinical practice, the provision of appropriate patient- and context-specific reminders may result in greater impact on patient safety. In this experimental study, a mix of easy and difficult simulated cases were used to assess the impact of a novel diagnostic reminder system (ISABEL on the quality of clinical decisions made by various grades of clinicians during acute assessment. Methods Subjects of different grades (consultants, registrars, senior house officers and medical students, assessed a balanced set of 24 simulated cases on a trial website. Subjects recorded their clinical decisions for the cases (differential diagnosis, test-ordering and treatment, before and after system consultation. A panel of two pediatric consultants independently provided gold standard responses for each case, against which subjects' quality of decisions was measured. The primary outcome measure was change in the count of diagnostic errors of omission (DEO. A more sensitive assessment of the system's impact was achieved using specific quality scores; additional consultation time resulting from DSS use was also calculated. Results 76 subjects (18 consultants, 24 registrars, 19 senior house officers and 15 students completed a total of 751 case episodes. The mean count of DEO fell from 5.5 to 5.0 across all subjects (repeated measures ANOVA, p Conclusion The provision of patient- and context-specific reminders has the potential to reduce diagnostic omissions across all subject grades for a range of cases. This study suggests a promising role for the use of future reminder-based DSS in the reduction of diagnostic error.

  2. Sexual motivation and anxiety-like behaviors of male rats after exposure to a trauma followed by situational reminders.

    Science.gov (United States)

    Hawley, Wayne; Grissom, Elin; Keskitalo, Lisa; Hastings, Tyler; Dohanich, Gary

    2011-02-01

    Experiencing a traumatic event can produce long-lasting impairments in affective and social behaviors. In humans, psychopathologies associated with exposure to a single traumatic event often are associated with varying degrees of sexual dysfunction. Similarly, in rats, exposure to a trauma results in long-lasting changes in social behaviors. The current investigation examined if the sexual and affective behaviors of male rats were impacted by exposure to a discrete traumatic event that was followed days later by reminders of the event. The initial trauma combined exposure to a foot shock and predator odor, followed 3 and 7 days later by reminders of the trauma in the absence of either stressor. A day after the final reminder, traumatized rats exhibited decreased sexual motivation indicated by prolonged mount and intromission latencies, although ejaculation latencies and post-ejaculatory intervals remained unchanged. Traumatized rats also exhibited marked increases in anxiety-like behavior in a novel environment as evidenced by longer latencies to begin feeding, decreased movement and ambulation, and fewer entries into the center of an open field. Taken together, the results of the current study suggest that exposure to a single traumatic event, followed by reminders of the event, affected the motivation of male rats to interact with a receptive female and increased their anxiety-like behaviors. Moreover, because posttraumatic stress disorder can arise from exposure to a single traumatic event and is associated with recurrent and intrusive thoughts related to the trauma, the current findings have implications for our understanding of this disorder. Copyright © 2010 Elsevier Inc. All rights reserved.

  3. Pentiptycene-Based Luminescent Cu (II) MOF Exhibiting Selective Gas Adsorption and Unprecedentedly High-Sensitivity Detection of Nitroaromatic Compounds (NACs)

    OpenAIRE

    Minghui Zhang; Liangliang Zhang; Zhenyu Xiao; Qinhui Zhang; Rongming Wang; Fangna Dai; Daofeng Sun

    2016-01-01

    The assembly of a fluorescent pentiptycene-based ligand with copper ion resulted in the formation of a 3D porous metal-organic framework (UPC-21) based on well-known paddlewheel SBUs. UPC-21 exhibits selective adsorption of CO2 over CH4 and N2 at 273 K and 295 K, C2H2 over CH4 at 273 K. The most significant performance of UPC-21 is its highly efficient detection of NACs such as 4-NP, 1,4-DNB, NB, and 1,3-DNB with the calculated quenching constants, K sv, being 3.097 × 106, 1.406 × 106, 4.420 ...

  4. Disease-specific direct-to-consumer advertising for reminding consumers to take medications.

    Science.gov (United States)

    Bhutada, Nilesh S; Rollins, Brent L

    2015-01-01

    To assess the relationship between disease-specific direct-to-consumer (DTC) advertising, via traditional advertising effectiveness measures, and consumers' self-reported medication-taking behavior. Data were gathered for 514 respondents (age 18 and above) using an online survey panel. Participants were exposed to a disease-specific (i.e., nonbranded) DTC advertising for depression. The advertising stimulus created for the study was based on the Food and Drug Administration guidelines for disease-specific DTC advertising and modeled after current print disease-specific DTC advertising. Participants reviewed the advertising stimulus through the online program and then responded to a questionnaire containing closed-ended questions assessing the constructs. Data were analyzed using chi-square tests. All tests were interpreted at an a priori alpha of 0.05. Significantly more respondents who were highly involved, paid more attention to the advertisement, and were responsive to DTC advertisements in the past indicated that the disease-specific DTC advertising stimulus reminded them to take their depression and other medications. These exploratory results show disease-specific DTC advertising can help people remember to take their prescription medication when viewed, which may lead to more positive medication-taking behavior and increased medication adherence. Additionally, given the fair balance and legal issues surrounding product-specific DTC advertising, disease-specific DTC advertising can serve as an effective component of the marketing mix for pharmaceutical manufacturers. Future research should attempt to study the impact of disease-specific DTC advertising on consumers' actual medication adherence using standardized adherence measures such as prescription records.

  5. The Personalized Reminder Information and Social Management System (PRISM) Trial: Rationale, Methods and Baseline Characteristics

    Science.gov (United States)

    Czaja, Sara J.; Boot, Walter R.; Charness, Neil; Rogers, Wendy; Sharit, Joseph; Fisk, Arthur D.; Lee, Chin Chin; Nair, Sankaran N.

    2014-01-01

    Technology holds promise in terms of providing support to older adults. To date there have been limited robust systematic efforts to evaluate the psychosocial benefits of technology for older people and identify factors that influence both the usability and uptake of technology systems. In response to these issues we developed the Personal Reminder Information and Social Management System (PRISM), a software application designed for older adults to support social connectivity, memory, knowledge about topics, leisure activities and access to resources. This trail is evaluating the impact of access to the PRISM system on outcomes such as social isolation, social support and connectivity. This paper reports on the approach used to design the PRISM system, study design, methodology and baseline data for the trial. The trial is multi-site randomized field trial. PRISM is being compared to a Binder condition where participants received a binder that contained content similar to that found on PRISM. The sample includes 300 older adults, aged 65 – 98 years, who lived alone and at risk for being isolated. The primary outcome measures for the trial include indices of social isolation and support and well-being. Secondary outcomes measures include indices of computer proficiency, technology uptake and attitudes towards technology. Follow-up assessments occurred at 6 and 12 months post-randomization. The results of this study will yield important information about the potential value of technology for older adults. The study also demonstrates how a user-centered iterative design approach can be incorporated into the design and evaluation of an intervention protocol. PMID:25460342

  6. Barriers to the use of reminder/recall interventions for immunizations: a systematic review

    Directory of Open Access Journals (Sweden)

    Pereira Jennifer A

    2012-12-01

    Full Text Available Abstract Background Although many studies have demonstrated the benefits of reminder/recall (RR measures to address patient under-immunization and improve immunization coverage, they are not widely implemented by healthcare providers. We identified providers’ perceived barriers to their use from existing literature. Methods We conducted a systematic review of relevant articles published in English between January 1990 and July 2011 that examined the perceptions of healthcare providers regarding barriers to tracking patient immunization history and implementing RR interventions. We searched MEDLINE, PubMed, EMBASE, Cumulative Index to Nursing and Allied Health Literature, Academic Search Premier, and PsychINFO. Additional strategies included hand-searching the references of pertinent articles and related reviews, and searching keywords in Google Scholar and Google. Results Ten articles were included; all described populations in the United States, and examined perceptions of family physicians, pediatricians, and other immunization staff. All articles were of moderate-high methodological quality; the majority (n=7 employed survey methodology. The most frequently described barriers involved the perceived human and financial resources associated with implementing an RR intervention, as well as low confidence in the accuracy of patient immunization records, given the lack of data sharing between multiple immunization providers. Changes to staff workflow, lack of appropriate electronic patient-tracking functionalities, and uncertainty regarding the success of RR interventions were also viewed as barriers to their adoption. Conclusions Although transitioning to electronic immunization records and registries should facilitate the implementation of RR interventions, numerous perceived barriers must still be overcome before the full benefits of these methods can be realized.

  7. The personalized reminder information and social management system (PRISM) trial: rationale, methods and baseline characteristics.

    Science.gov (United States)

    Czaja, Sara J; Boot, Walter R; Charness, Neil; A Rogers, Wendy; Sharit, Joseph; Fisk, Arthur D; Lee, Chin Chin; Nair, Sankaran N

    2015-01-01

    Technology holds promise in terms of providing support to older adults. To date, there have been limited robust systematic efforts to evaluate the psychosocial benefits of technology for older people and identify factors that influence both the usability and uptake of technology systems. In response to these issues, we developed the Personal Reminder Information and Social Management System (PRISM), a software application designed for older adults to support social connectivity, memory, knowledge about topics, leisure activities and access to resources. This trail is evaluating the impact of access to the PRISM system on outcomes such as social isolation, social support and connectivity. This paper reports on the approach used to design the PRISM system, study design, methodology and baseline data for the trial. The trial is multi-site randomized field trial. PRISM is being compared to a Binder condition where participants received a binder that contained content similar to that found on PRISM. The sample includes 300 older adults, aged 65-98 years, who lived alone and at risk for being isolated. The primary outcome measures for the trial include indices of social isolation and support and well-being. Secondary outcomes measures include indices of computer proficiency, technology uptake and attitudes towards technology. Follow-up assessments occurred at 6 and 12 months post-randomization. The results of this study will yield important information about the potential value of technology for older adults. The study also demonstrates how a user-centered iterative design approach can be incorporated into the design and evaluation of an intervention protocol. Copyright © 2014 Elsevier Inc. All rights reserved.

  8. Sulfitos duplos contendo cobre (I e um metal de transição M(II tipo Cu2SO3.M(IISO3.2H 2O [M(II = Cu(II, Fe(II, Mn(II e Cd(II]: preparação e seletividade na incorporação de M(II Double sulfite containing copper (I and a metal transition M(II like Cu2SO3.M(IISO3.2H 2O [M(II = Cu(II, Fe(II, Mn(II and Cd(II]: synthesis and selectivity in M(II incorporation

    Directory of Open Access Journals (Sweden)

    Luciana Almeida Silva

    1998-04-01

    Full Text Available The metal-catalyzed autooxidation of S(IV has been studied for more than a century without a consensus being obtained as to reaction rates, rate laws or mechanisms. The main objective in this work was to explore the reaction between Cu(II and SO2 in the presence of M(II, paying special attention to the formation of double sulfites like Cu2SO3.M(IISO3.2H 2O. The two principal aspects studied were: i a new way to prepare double sulfites with high purity degree and the selectivity in the M(II incorporation during the salt formation.

  9. Ce0.95Cr0.05O2 and Ce0.97Cu0.03O2: Active, selective and stable catalysts for selective hydrogen combustion

    NARCIS (Netherlands)

    Beckers, J.; Rothenberg, G.

    2009-01-01

    Ceria-based materials are promising solid oxygen reservoirs for propane oxidative dehydrogenation. The ceria lattice oxygen can selectively combust hydrogen from the dehydrogenation mixture at 550 °C. This shifts the dehydrogenation equilibrium to the desired products side, generates heat aiding the

  10. The effectiveness of computer reminders for improving quality assessment for point-of-care testing in general practice - a randomized controlled trial

    DEFF Research Database (Denmark)

    Kousgaard, Marius Brostrøm; Siersma, Volkert Dirk; Reventlow, Susanne

    2013-01-01

    for improving adherence to a quality assessment scheme for point-of-care testing in general practice. METHOD: The study was conducted as a randomized controlled crossover trial among general practices in the Capital Region of Denmark. The intervention consisted of sending computer reminders (Com......Rem) to practices not adhering to the guideline recommendations of split testing for hemoglobin and glucose. Practices were randomly allocated into two groups. During the first follow-up period, one of the groups received the ComRem intervention together with the general implementation activities (GIA), while......BACKGROUND: Computer reminders are increasingly being applied in efforts to improve quality and patient safety. However, research is still needed to establish the effectiveness of different kinds of reminders in various settings. This study aimed to evaluate the effectiveness of computer reminders...

  11. Effect of temperature and pH value on cation exchange performance of a natural clay for selective (Cu2þ, Co2þ) removal:Equilibrium, sorption and kinetics

    Institute of Scientific and Technical Information of China (English)

    Ramzi Chalghaf; Walid Oueslati; Marwa Ammar; Hafsia Ben Rhaiem; Abdesslem Ben Haj Amara

    2013-01-01

    This work aims at investigating the strain effect, created by varying pH solution and continuous heating cycle, on the cation exchange process in the case of Na-rich montmorillonite sample in contact with bi-ionic solution with variable concentration, saturated respectively by Co2þ and Cu2þ cations. The ionic exchange process is characterized using XRD analysis obtained through the comparison of experimental XRD patterns with calculated ones, which allowed us to determine several structural parameters related to the nature, abundance, size, position and organization of exchangeable cation and water molecule in the interlamellar space along the cn axis. Indeed, the proposed theoretical models, for the stressed samples, show that the structure presents an interstratified hydration character and proves the coexistence of more than two ‘‘crystallite’’ specie in the structure. The perturbation types have an obvious effect on the selective exchange process for all stressed samples, where the interlayer space is characterized by the coexistence of more one exchangeable cation.

  12. Ternary alloy systems. Phase diagrams, crystallographic and thermodynamic data critically evaluated by MSIT {sup registered}. Subvol. D. Iron systems. Pt. 3: Selected systems from Co-Fe-Si to Cu-Fe-Pt

    Energy Technology Data Exchange (ETDEWEB)

    Effenberg, Guenter; Ilyenko, Svitlana (eds.) [MSI, Materials Science International Services GmbH, Stuttgart (Germany); Bochvar, Nataliya; Bondar, Anatoliy; Cornish, Lesley (and others)

    2008-07-01

    Volume 11 of group IV presents phase diagrams, crystallographic and thermodynamic data of ternary alloy systems. The subvolume D deals with iron systems, with part 3 considering selected systems from Co-Fe-Si to Cu-Fe-Pt. At ambient pressure the equilibria of each individual ternary system are discussed as functions of temperature yielding spatial diagrams whose sections and projections are displayed. The phase equilibria are described in terms of liquidus, solidus and solvus projections, isothermal, vertical and quasibinary sections. Data on invariant equilibria are generally given in the form of tables and reaction schemes. The volume forms a comprehensive review and rigorous systematization of the presently available data. For each system the often conflicting literature and contradictory information has been thoroughly evaluated by a team of experts, MSIT, and can thus be presented in a standard format. Back to the year 1900 the literature has been reviewed, implying possible reinterpretations from today's state of knowledge, and incorporated in the volume. The tables and diagrams are preceded by descriptive commenting texts. (orig.)

  13. Ternary alloy systems. Phase diagrams, crystallographic and thermodynamic data critically evaluated by MSIT {sup registered}. Subvol. D. Iron systems. Pt. 4: Selected systems from Cu-Fe-Si to Fe-N-U

    Energy Technology Data Exchange (ETDEWEB)

    Effenberg, Guenter; Ilyenko, Svitlana (eds.) [MSI, Materials Science International Services GmbH, Stuttgart (Germany); Baetzner, Christian; Cacciamani, Gabriele; Cornish, Lesley (and others)

    2008-07-01

    Volume 11 of group IV presents phase diagrams, crystallographic and thermodynamic data of ternary alloy systems. The subvolume D deals with iron systems, with part 4 considering selected systems from Cu-Fe-Si to Fe-N-U. At ambient pressure the equilibria of each individual ternary system are discussed as functions of temperature yielding spatial diagrams whose sections and projections are displayed. The phase equilibria are described in terms of liquidus, solidus and solvus projections, isothermal, vertical and quasibinary sections. Data on invariant equilibria are generally given in the form of tables and reaction schemes. The volume forms a comprehensive review and rigorous systematization of the presently available data. For each system the often conflicting literature and contradictory information has been thoroughly evaluated by a team of experts, MSIT, and can thus be presented in a standard format. Back to the year 1900 the literature has been reviewed, implying possible reinterpretations from today's state of knowledge, and incorporated in the volume. The tables and diagrams are preceded by descriptive commenting texts. (orig.)

  14. In situ DRIFTs investigation of the reaction mechanism over MnOx-MOy/Ce0.75Zr0.25O2 (M = Fe, Co, Ni, Cu) for the selective catalytic reduction of NOx with NH3

    Science.gov (United States)

    Hu, Hang; Zha, Kaiwen; Li, Hongrui; Shi, Liyi; Zhang, Dengsong

    2016-11-01

    A series of MnOx-MOy/Ce0.75Zr0.25O2 (M = Fe, Co, Ni, Cu) catalysts were synthesized by an impregnation method and used for selective catalytic reduction (SCR) of NOx with NH3. The catalytic performances of various MnOx-MOy/Ce0.75Zr0.25O2 catalysts were studied. It was found that MnOx-FeOy/Ce0.75Zr0.25O2 catalyst showed excellent low-temperature activity and a broad temperature window. The catalysts were characterized by N2 adsorption/desorption, X-ray diffraction, X-ray photoelectron spectroscopy and in situ diffuse reflectance infrared transform spectroscopy (DRIFTS). Characterization of the catalyst confirmed the addition of iron oxide can enhance the NO oxidation ability of the catalyst which results in the outstanding low-temperature SCR activity. Meanwhile, iron oxides were well dispersed on catalyst surface which could avoid the agglomeration of active species, contributing to the strong interaction between active species and the support. More importantly, in situ DRIFTS results confirmed that bidentate nitrates are general active species on these catalysts, whereas the reactivity of gaseous NO2 and bridged nitrates got improved because of the addition of Fe.

  15. Determination of the mechanism of photoinduced toxicity of selected metal oxide nanoparticles (ZnO, CuO, Co3O4 and TiO2) to E. coli bacteria.

    Science.gov (United States)

    Dasari, Thabitha P; Pathakoti, Kavitha; Hwang, Huey-Min

    2013-05-01

    Cytotoxicity of selected metal oxide nanoparticles (MNPs) (ZnO, CuO, Co3O4 and TiO2) was investigated in Escherichia coli both under light and dark conditions. Cytotoxicity experiments were conducted with spread plate counting and the LC50 values were calculated. We determined the mechanism of toxicity via measurements of oxidative stress, reduced glutathione, lipid peroxidation, and metal ions. The overall ranking of the LC50 values was in the order of ZnO TiO2 under dark condition and ZnO TiO2 < Co3O4 under light condition. ZnO MNPs were the most toxic among the tested nanoparticles. Our results indicate depletion of reduced glutathione level and elevation of malondialdehyde level correlated with the increase in oxidative stress. Released metal ions were found to have partial effect on the toxicity of MNPs to E. coli. In summary, the dynamic interactions of multiple mechanisms lead to the toxicity of the tested MNPs to E. coli.

  16. Identification of the nano/micro structure of CeO2(rod) and the essential role of interfacial copper-ceria interaction in CuCe(rod) for selective oxidation of CO in H2-rich streams

    Science.gov (United States)

    Guo, Xiaolin; Zhou, Renxian

    2017-09-01

    CeO2(rod) has been found to be exposed four {111} planes and two {100} planes with a hexangular cross section, and the growth mechanism follows to the oriented attachment of the cube-like basic grains with a [110] growth direction and the subsequent Ostwald ripening, corresponding to the increasing lateral size and longitudinal size with prolonging the hydrothermal time. Equal amount of copper oxide totally highly distributed on the surface of CeO2(rod) supports with different abundance of oxygen vacancies facilitate to produce the strongly bound Cu-[Ox]-Ce species to different degrees (supported by XPS, H2-TPR and in situ DRIFTs results), which is encouraged by prolongation of hydrothermal time of CeO2(rod) supports. The essential role of interfacial Cu-Ce interaction in CuCe(rod) catalysts for CO-PROX was identified by the enhanced catalytic performance of CuCe(rod)-48h, on account of much stronger Cu-Ce interaction generated in it. Moreover, we proposed a potential structural model of strongly bound Cu-[Ox]-Ce to interpret the synergetic effect of copper and ceria species in CuO/CeO2 catalysts and generalized the possible reaction mechanism for CO-PROX over the CuCe(rod) catalyst.

  17. The effect of soot on ammonium nitrate species and NO2 selective catalytic reduction over Cu-zeolite catalyst-coated particulate filter.

    Science.gov (United States)

    Mihai, Oana; Tamm, Stefanie; Stenfeldt, Marie; Olsson, Louise

    2016-02-28

    A selective catalytic reduction (SCR)-coated particulate filter was evaluated by means of dynamic tests performed using NH3, NO2, O2 and H2O. The reactions were examined both prior to and after soot removal in order to study the effect of soot on ammonium nitrate formation and decomposition, ammonia storage and NO2 SCR. A slightly larger ammonia storage capacity was observed when soot was present in the sample, which indicated that small amounts of ammonia can adsorb on the soot. Feeding of NO2 and NH3 in the presence of O2 and H2O at low temperature (150, 175 and 200°C) leads to a large formation of ammonium nitrate species and during the subsequent temperature ramp using H2O and argon, a production of nitrous oxides was observed. The N2O formation is often related to ammonium nitrate decomposition, and our results showed that the N2O formation was clearly decreased by the presence of soot. We therefore propose that in the presence of soot, there are fewer ammonium nitrate species on the surface due to the interactions with the soot. Indeed, we do observe CO2 production during the reaction conditions also at 150°C, which shows that there is a reaction with these species and soot. In addition, the conversion of NOx due to NO2 SCR was significantly enhanced in the presence of soot; we attribute this to the smaller amount of ammonium nitrate species present in the experiments where soot is available since it is well known that ammonium nitrate formation is a major problem at low temperature due to the blocking of the catalytic sites. Further, a scanning electron microscopy analysis of the soot particles shows that they are about 30-40 nm and are therefore too large to enter the pores of the zeolites. There are likely CuxOy or other copper species available on the outside of the zeolite crystallites, which could have been enhanced due to the hydrothermal treatment at 850°C of the SCR-coated filter prior to the soot loading. We therefore propose that soot is

  18. Effect of SO2 on selective catalytic reduction of NO over Mn-Cu-Ce/TiO2 at low temperature%SO2 对Mn-Cu-Ce/TiO2 低温选择催化还原NO的影响

    Institute of Scientific and Technical Information of China (English)

    伍斌; 黄妍; 郑毅; 童志权

    2008-01-01

    研究了SO2对Mn-Cu-Ce/TiO2选择催化还原 NO 的影响,并采用傅立叶变换红外光谱、x射线衍射光谱及暂态响应技术对Mn-Cu-Ce/TiO2催化剂的SO2中毒机理进行了探讨.结果表明,SO2 可强吸附在Mn-Cu-Ce/TiO2表面的 CuO 活性位上.并生成 CuSO4,由于 CuSO4 在低温时对SCR 反应有抑制作用,因而,催化剂的活性下降;暂态响应实验结果表明,Mn-Cu-Ce/TiO2催化剂上的SCR反应主要遵循 Langmuir-Hinshelwood机理.通过对催化剂进行硫酸化或 NO 预吸附,可以消除SO2对 Mn-Cu-Ce/TiO2的毒害作用.

  19. 氧化锆负载Pd-Cu双金属催化剂上山梨醇选择性氢解合成乙二醇和丙二醇%Selective hydrogenolysis of sorbitol to ethylene glycol and propylene glycol on ZrO2-supported bimetallic Pd-Cu catalysts

    Institute of Scientific and Technical Information of China (English)

    贾玉庆; 刘海超

    2015-01-01

    Sorbitol is one of the key building blocks in catalytic conversion of biomass, and its selective hydro-genolysis to ethylene glycol and propylene glycol provides a viable and sustainable route towards the synthesis of the two glycols. Herein, the hydrogenolysis of biomass-derived sorbitol was studied on Pd-modified Cu/monoclinic zirconia (Pd-Cu/ZrO2) catalysts with a wide range of Cu/Pd atomic ratios in the presence of La(OH)3. The bimetallic Pd-Cu/ZrO2 catalysts showed superior activities and selectivities to the two target glycols, compared with the monometallic Cu/ZrO2 and Pd/ZrO2 catalysts under identical conditions. At nearly 100%sorbitol conversion, a combined selectivity of 61.7%to ethylene glycol, propylene glycol, and glycerol was obtained on Pd-Cu/ZrO2 (Cu/Pd=5) at 493 K under 5.0 MPa H2. Pd-Cu/ZrO2 was also stable and recyclable, in contrast to Cu/ZrO2, which suffered severe deactivation because of agglomeration of Cu particles during sorbitol hydrogenoly-sis. Clearly, the presence of Pd improved not only the activity and selectivity of the Cu catalyst, but also the hydrothermal stability. Characterization of these catalysts by X-ray diffraction, dif-fuse-reflectance infrared Fourier transform spectroscopy of CO adsorption, and H2 tempera-ture-programmed reduction suggests that the Cu particles deposited on the Pd surfaces with close contact and strong interaction between the two metals, most likely involving electron transfer from Pd to Cu. Such structural and electronic effects are proposed as the critical contributors to the sig-nificant promoting effect of Pd on the activity and stability of Pd-Cu catalysts in sorbitol hydrogen-olysis. These findings provide useful information for design of new Cu-based catalysts with higher efficiency and stability for selective hydrogenolysis of polyols and other biomass-derived reactants under hydrothermal conditions.%山梨醇和木糖醇等多元醇是可再生生物质转化合成液体燃料和化学品的重

  20. Patient acceptance and perceived utility of pre-consultation prevention summaries and reminders in general practice: pilot study

    Directory of Open Access Journals (Sweden)

    Aylward Paul

    2011-05-01

    Full Text Available Abstract Background Patients attending general practices receive only about sixty per cent of the preventive services that are indicated for them. This pilot study explores patient acceptability and perceived utility of automatically generated prevention summary and reminder sheets provided to patients immediately before consultations with their general practitioners. Methods Adult patients attending a general practitioner in a practice in Adelaide and a general practitioner in a practice in Melbourne, Australia for consultations in January and February 2009 received automatically-generated prevention summary and reminder sheets that highlighted indicated preventive activities that were due to be performed, and that encouraged the patient to discuss these with the general practitioner in the consultation. Patients completed a post-consultation questionnaire and were interviewed about their experience of receiving the sheets. Results Sixty patients, median age 53 years (interquartile range 40-74 years, and 58% female, were recruited. Seventy eight per cent of patients found the sheets clear and easy to understand, 75% found them very or quite useful, 72% reported they had addressed with their general practitioner all of the preventive activities that were listed on the sheets as being due to be performed. A further 13% indicated that they had addressed most or some of the activities. 78% of patients said that they would like to keep receiving the sheets. Themes emerging from interviews with patients included: patient knowledge was enhanced; patient conceptions of health and the GP consultation were broadened; the consultation was enhanced; patient pro-activity was encouraged; patients were encouraged to plan their health care; the intervention was suitable for a variety of patients. Conclusions Most patients reported that they found the prevention summary and reminder sheets acceptable and useful. The actual increase in performance of preventive

  1. The effect of reminder calls in reducing non-attendance rates at care of the elderly clinics

    Science.gov (United States)

    Dockery, F; Rajkumar, C; Chapman, C; Bulpitt, C; Nicholl, C

    2001-01-01

    BACKGROUND—DNA ("did not attend") at outpatient clinics is an important problem costing the NHS an estimated £266 million annually. The national DNA rate for 1996-1997 for all clinics was 12%. The DNA rate at Hammersmith Hospital for the same year in the care of the elderly specialty was 21%. The aim of this study was to establish why this was so, and to test the efficacy of a reminder call in increasing attendance rates at care of the elderly clinics.
METHODS—23 DNAs from seven clinics were contacted to ascertain the reasons for non-attendance (group I). For seven further clinics, 84 patients were contacted in advance to reconfirm their appointment (group II).
RESULTS—From group II 12 patients were identified who were unaware of their appointment (14%), six of whom agreed to attend; thus six potential DNAs were prevented. Eleven vacant appointments were identified in advance. The unexpected DNA rate was reduced to 5% from a potential 21% as a result of this exercise. The DNA rate for all patients with dementia (both groups) was 44%, whereas the DNA rate for all patients without this diagnosis (both groups) was 16% (p < 0.001).
CONCLUSIONS—A preclinic phone call reminder to elderly patients is feasible, increases attendance rates, and identifies vacant appointments. Patients with dementia are more likely to miss clinic appointments; therefore they and their carers need specific reminders about appointment dates.
 PMID:11123393

  2. Motivational counselling and SMS-reminders for reduction of daily sitting time in patients with rheumatoid arthritis

    DEFF Research Database (Denmark)

    Thomsen, T; Aadahl, Mette; Beyer, Nina Ann-Marie

    2016-01-01

    tailored, theory-based behavioural intervention targeting reduction in daily sitting time in patients with RA. METHODS: A randomised, controlled trial with two parallel groups. RA patients >18 years of age and Health Assessment Questionnaire (HAQ) score ... for daily leisure time sitting > 4 h. The 16-week intervention included 1) three individual motivational counselling sessions and 2) individual text message reminders aimed at reducing daily sitting time. The control group was encouraged to maintain their usual lifestyles. Outcomes were assessed at baseline...

  3. The effect of reminder calls in reducing non-attendance rates at care of the elderly clinics

    OpenAIRE

    2001-01-01

    BACKGROUND—DNA ("did not attend") at outpatient clinics is an important problem costing the NHS an estimated £266 million annually. The national DNA rate for 1996-1997 for all clinics was 12%. The DNA rate at Hammersmith Hospital for the same year in the care of the elderly specialty was 21%. The aim of this study was to establish why this was so, and to test the efficacy of a reminder call in increasing attendance rates at care of the elderly clinics.
METHODS—23 DNAs from seven clinics were ...

  4. Motivational counselling and SMS-reminders for reduction of daily sitting time in patients with rheumatoid arthritis

    DEFF Research Database (Denmark)

    Thomsen, T; Aadahl, Mette; Beyer, Nina Ann-Marie

    2016-01-01

    tailored, theory-based behavioural intervention targeting reduction in daily sitting time in patients with RA. METHODS: A randomised, controlled trial with two parallel groups. RA patients >18 years of age and Health Assessment Questionnaire (HAQ) score ... for daily leisure time sitting > 4 h. The 16-week intervention included 1) three individual motivational counselling sessions and 2) individual text message reminders aimed at reducing daily sitting time. The control group was encouraged to maintain their usual lifestyles. Outcomes were assessed at baseline...

  5. The efficacy of motivational counseling and SMS-reminders on daily sitting time in patients with rheumatoid arthritis

    DEFF Research Database (Denmark)

    Esbensen, Bente Appel; Thomsen, Tanja; Hetland, Merete L

    2015-01-01

    that SB can be reduced by behavioural interventions in healthy populations. However, it remains unexplored whether it is valid for patients with RA also. Therefore, the aim of this trial is to investigate the efficacy of an individually tailored, theory-based motivational counseling intervention...... group receiving usual care. The intervention includes: 1) individual motivational counseling (in total 3 sessions) on reduction of daily sitting time in combination with 2) individual Short Text Message Service (SMS) reminders over a 16-week intervention period. Primary outcome is change in daily...

  6. The Nurse Watch: Design and Evaluation of a Smart Watch Application with Vital Sign Monitoring and Checklist Reminders.

    Science.gov (United States)

    Bang, Magnus; Solnevik, Katarina; Eriksson, Henrik

    Computerized wearable devices such as smart watches will become valuable nursing tools. This paper describes a smart-watch system developed in close collaboration with a team of nurses working in a Swedish ICU. The smart-watch system provides real-time vital-sign monitoring, threshold alarms, and to-do reminders. Additionally, a Kanban board, visualized on a multitouch screen provides an overview of completed and upcoming tasks. We describe an approach to implement automated checklist systems with smart watches and discuss aspects of importance when implementing such memory and attention support. The paper is finalized with an in-development formative evaluation of the system.

  7. A Novel Cu-Mo/ZSM-5 Catalyst for NOx Catalytic Reduction with Ammonia

    Institute of Scientific and Technical Information of China (English)

    Zhe Li; Dang Li; Wei Huang; Kechang Xie

    2005-01-01

    The Cu-Mo/ZSM-5 catalysts with different Cu/Mo ratios were prepared by wet impregnation method, and their catalytic performance for selective catalytic reduction of NOx was studied. The results showed that Cu-Mo/ZSM-5 is a very effective catalyst for NOx catalytic reduction with ammonia, especially when Cu/Mo molar ratio is about 1.5. It not only exhibited the extremely high catalytic activity, but also showed good stability for O2. The bulk phase structure of Cu-Mo/ZSM-5 catalysts was determined by XRD technique, and the results indicated that there is a maximum dispersion for Cu species when Cu/Mo molar ratio is 1.5, and an interaction between Cu and Mo along with HZSM-5 may be present in Cu-Mo/ZSM-5, which may possibly result in a special structure favorable for the catalytic reduction of NOx over Cu-Mo/ZSM-5 catalyst.

  8. On Cu(II) Cu(II) distance measurements using pulsed electron electron double resonance

    Science.gov (United States)

    Yang, Zhongyu; Becker, James; Saxena, Sunil

    2007-10-01

    The effects of orientational selectivity on the 4-pulse electron electron double resonance (PELDOR) ESR spectra of coupled Cu(II)-Cu(II) spins are presented. The data were collected at four magnetic fields on a poly-proline peptide containing two Cu(II) centers. The Cu(II)-PELDOR spectra of this peptide do not change appreciably with magnetic field at X-band. The data were analyzed by adapting the theory of Maryasov, Tsvetkov, and Raap [A.G. Maryasov, Y.D. Tsvetkov, J. Raap, Weakly coupled radical pairs in solids:ELDOR in ESE structure studies, Appl. Magn. Reson. 14 (1998) 101-113]. Simulations indicate that orientational effects are important for Cu(II)-PELDOR. Based on simulations, the field-independence of the PELDOR data for this peptide is likely due to two effects. First, for this peptide, the Cu(II) g-tensor(s) are in a very specific orientation with respect to the interspin vector. Second, the flexibility of the peptide washes out the orientation effects. These effects reduce the suitability of the poly-proline based peptide as a good model system to experimentally probe orientational effects in such experiments. An average Cu(II)-Cu(II) distance of 2.1-2.2 nm was determined, which is consistent with earlier double quantum coherence ESR results.

  9. Reminders of behavioral disinhibition increase public conformity in the Asch paradigm and behavioral affiliation with ingroup members.

    Science.gov (United States)

    van den Bos, Kees; Lind, E A; Bommelé, Jeroen; VandeVondele, Sebastian D J

    2015-01-01

    This paper argues that being in the Asch situation, where there is a felt need to conform to others' faulty behaviors, poses a social threat to people. Furthermore, participating in a psychology experiment in which you will have to interact with other participants might trigger sense-making processes. The paper proposes that these assumed threats or sense-making processes are likely to activate the behavioral inhibition system, making people respond in more inhibited ways than they normally would be inclined to do. As a result, people's tendency to affiliate behaviorally with persons who are similar to them can be inhibited. The implication is that lowering behavioral inhibition (by experimentally reminding people about having acted without behavioral inhibitions) should lead to more public conformity in the Asch situation and stronger behavioral affiliation with ingroup members than not being reminded about behavioral disinhibition. Findings of four experiments support this line of reasoning. These findings are discussed in terms of behavioral inhibition and behavioral affiliation. Alternative accounts of the data that focus on social belongingness threats and optimal distinctiveness are also considered.

  10. Reminders of behavioral disinhibition increase public conformity in the Asch paradigm and behavioral affiliation with ingroup members

    Directory of Open Access Journals (Sweden)

    Kees evan den Bos

    2015-06-01

    Full Text Available This paper argues that being in the Asch situation, where there is a felt need to conform to others' faulty behaviors, poses a social threat to people. Furthermore, participating in a psychology experiment in which you will have to interact with other participants might trigger sense-making processes. The paper proposes that these assumed threats or sense-making processes are likely to activate the behavioral inhibition system, making people respond in more inhibited ways than they normally would be inclined to do. As a result, people's tendency to affiliate behaviorally with persons who are similar to them can be inhibited. The implication is that lowering behavioral inhibition (by experimentally reminding people about having acted without behavioral inhibitions should lead to more public conformity in the Asch situation and stronger behavioral affiliation with ingroup members than not being reminded about behavioral disinhibition. Findings of four experiments support this line of reasoning. These findings are discussed in terms of behavioral inhibition and behavioral affiliation. Alternative accounts of the data that focus on social belongingness threats and optimal distinctiveness are also considered.

  11. The effects of exercise reminder software program on office workers' perceived pain level, work performance and quality of life.

    Science.gov (United States)

    Irmak, A; Bumin, G; Irmak, R

    2012-01-01

    In direct proportion to current technological developments, both the computer usage in the workplaces is increased and requirement of leaving the desk for an office worker in order to photocopy a document, send or receive an e-mail is decreased. Therefore, office workers stay in the same postures accompanied by long periods of keyboard usage. In recent years, with intent to reduce the incidence of work related musculoskeletal disorders several exercise reminder software programs have been developed. The purpose of this study is to evaluate the effectiveness of the exercise reminder software program on office workers' perceived pain level, work performance and quality of life. 39 healthy office workers accepted to attend the study. Participants were randomly split in to two groups, control group (n = 19) and intervention group (n = 20). Visual Analogue Scale to evaluate the perceived pain was administered all of the participants in the beginning and at the end of the study. The intervention group used the program for 10 weeks. Findings showed that the control group VAS scores remained the same, but the intervention group VAS scores decreased in a statistically significant way (p office workers. Further long term studies with more subjects are needed to describe the effects of these programs and the mechanism under these effects.

  12. Evaluating the Effectiveness of a Front Windshield Sticker Reminder in Reducing Texting while Driving in Young Adults.

    Science.gov (United States)

    Rohl, Austin; Eriksson, Sven; Metcalf, David

    2016-07-14

    Texting while driving is a dangerous activity that is on the rise in the United States (U.S.). Since 2011 there has been a 17% increase in the number of people injured in a motor vehicle crash involving a distracted driver. Bans on the act of texting and driving have already taken place in 46 states in the U.S., but studies have shown that they are ineffective. An unstudied method of reducing texting while driving is sticker reminders. Sticker reminders have already been proven to be an effective intervention in the realm of driver safety; one study found that a "Buckle-Up" dashboard sticker doubled the use of safety belts by front seat passengers. In this study, 104 medical students aged 21 - 29, from the University of Central Florida (UCF) College of Medicine were randomly divided into two groups, an interventional group receiving a "Drive in the Moment" windshield sticker, and a control group not receiving the sticker. Both groups took a pre- and post-survey that recorded self-reported texting and driving frequency. The results showed that the sticker intervention significantly reduced reported rates of sending texts while driving, reading texts while driving, and using social media while driving (p texting while driving the epidemic.

  13. The effectiveness of SMS Reminders and the impact of patient characteristics on missed appointments in a public dental outpatient clinic

    Directory of Open Access Journals (Sweden)

    Emilia Bellucci

    2017-03-01

    Full Text Available This paper reports on the Failure To Attend (FTA rate of appointments as well as patients following the implementation of SMS reminders in a public dental outpatient service.  Given the ineffectiveness of the intervention and a highly representative patient’s profile, this paper identifies the demographic characteristics of patients who miss all of their appointments.  Data on appointment attendance, patient demographics and dental service type was collected over a time period of 46 consecutive months.  Using descriptive and inferential statistics (chi-square, two sample tests and Marascuilo procedure we found the SMS intervention was ineffective in reducing the FTA rates. Further, patients associated with high rates of non-attendance exhibited one or more of the following characteristics: male; age 26 – 44; non-concession card holders; a person of Indigenous, local, Asian or African descent, and of refugee status, persons living in low socio-economic areas; and appointments in General Care and Student Clinics. Whilst the literature overwhelmingly attributes SMS reminders to improving the attendance rate of patients in outpatient clinics, our contradictory findings suggest a more targeted approach in settings whose patients exhibit strong characteristics associated with non-attendance.

  14. "There's no billing code for empathy" - Animated comics remind medical students of empathy: a qualitative study.

    Science.gov (United States)

    Tsao, Pamela; Yu, Catherine H

    2016-08-12

    Physician empathy is associated with improved diabetes outcomes. However, empathy declines throughout medical school training. This study seeks to describe how comics on diabetes affect learning processes for empathy in medical students. All first- or second-year students at a Canadian medical school were invited to provide written reflections on two comics regarding diabetes and participate in a focus group. Responses were analyzed qualitatively for emergent themes. Students completed the Jefferson Scale of Physician Empathy (JSPE) at baseline, after the comic, and after the focus group. Linear mixed model statistical analyses were performed. Thirteen first-year and 12 second-year students participated. Qualitative analysis revealed four themes: 1) Empathy decline and its barriers; 2) Impact of the comic and focus group on knowledge, attitudes and skills; 3) Role of the comic in the curriculum as a reminder tool of the importance of empathy; 4) Comics as an effective medium. Baseline mean JSPE scores were 116.4 (SD 10.5) and trended up to 117.2 (SD 12.5) and 119.6 (SD 15.2) after viewing the comics and participating in the focus groups, respectively (p = 0.08). Animated comics on diabetes are novel methods of reminding students about empathy by highlighting the patient perspective.

  15. Evaluating the Effectiveness of a Front Windshield Sticker Reminder in Reducing Texting while Driving in Young Adults

    Science.gov (United States)

    Eriksson, Sven; Metcalf, David

    2016-01-01

    Texting while driving is a dangerous activity that is on the rise in the United States (U.S.). Since 2011 there has been a 17% increase in the number of people injured in a motor vehicle crash involving a distracted driver. Bans on the act of texting and driving have already taken place in 46 states in the U.S., but studies have shown that they are ineffective. An unstudied method of reducing texting while driving is sticker reminders. Sticker reminders have already been proven to be an effective intervention in the realm of driver safety; one study found that a “Buckle-Up” dashboard sticker doubled the use of safety belts by front seat passengers. In this study, 104 medical students aged 21 - 29, from the University of Central Florida (UCF) College of Medicine were randomly divided into two groups, an interventional group receiving a “Drive in the Moment” windshield sticker, and a control group not receiving the sticker. Both groups took a pre- and post-survey that recorded self-reported texting and driving frequency. The results showed that the sticker intervention significantly reduced reported rates of sending texts while driving, reading texts while driving, and using social media while driving (p < 0.05). The results of this study suggest that a novel sticker-intervention could potentially serve as a point of attack when addressing the growing and dangerous texting while driving the epidemic. PMID:27555989

  16. Translation of associative learning models into extinction reminders delivered via mobile phones during cue exposure interventions for substance use.

    Science.gov (United States)

    Rosenthal, M Zachary; Kutlu, Munir G

    2014-09-01

    Despite experimental findings and some treatment research supporting the use of cues as a means to induce and extinguish cravings, interventions using cue exposure have not been well integrated into contemporary substance abuse treatments. A primary problem with exposure-based interventions for addiction is that after learning not to use substances in the presence of addiction cues inside the clinic (i.e., extinction), stimuli in the naturalistic setting outside the clinic may continue to elicit craving, drug use, or other maladaptive conditioned responses. For exposure-based substance use interventions to be efficacious, new approaches are needed that can prevent relapse by directly generalizing learning from the therapeutic setting into naturalistic settings associated with a high risk for relapse. Basic research suggests that extinction reminders (ERs) can be paired with the context of learning new and more adaptive conditioned responses to substance abuse cues in exposure therapies for addiction. Using mobile phones and automated dialing and data collection software, ERs can be delivered in everyday high-risk settings to inhibit conditioned responses to substance-use-related stimuli. In this review, we describe how associative learning mechanisms (e.g., conditioned inhibition) can inform how ERs are conceptualized, learned, and implemented to prevent substance use when delivered via mobile phones. This approach, exposure with portable reminders of extinction, is introduced as an adjunctive intervention that uses brief automated ERs between clinic visits when individuals are in high-risk settings for drug use.

  17. EFFECTIVENESS OF AN UPPER EXTREMITY EXERCISE DEVICE AND TEXT MESSAGE REMINDERS TO EXERCISE IN ADULTS WITH SPINA BIFIDA: A PILOT STUDY

    Science.gov (United States)

    Crytzer, Theresa M.; Dicianno, Brad E.; Fairman, Andrea D.

    2013-01-01

    Background Obesity, deconditioning, cognitive impairment, and poor exercise tolerance are health issues concerning adults with spina bifida (SB). Our aim is to describe exercise participation and identify motivating tactics and exercise devices that increase participation. Design In a quasi-experimental randomized crossover design, the GameCycle was compared to a Saratoga Silver I arm ergometer. Personalized free or low cost text/voice message reminders to exercise were sent. Methods Nineteen young adults with SB were assigned to either the GameCycle or Saratoga exercise group. Within each group, participants were randomized to receive reminders to exercise, or no reminders, then crossed over to the opposite message group after eight weeks. Before and after a 16 week exercise program we collected anthropometric, metabolic, exercise testing and questionnaire data, and recorded participation. Results Miles traveled by the GameCycle group were significantly higher than the Saratoga exercise groups. No significant differences were found in participation between the message reminder groups. Low participation rates were seen overall. Conclusions Those using the GameCycle traveled more miles. Barriers to exercise participation may have superseded ability to motivate adults with SB to exercise even with electronic reminders. Support from therapists to combat deconditioning and develop coping skills may be needed. PMID:24620701

  18. Healthy dining. Subtle diet reminders at the point of purchase increase low-calorie food choices among both chronic and current dieters.

    Science.gov (United States)

    Papies, Esther K; Veling, Harm

    2013-02-01

    There is a growing consensus that our food-rich living environment contributes to rising numbers of people with overweight and obesity. Low-cost, effective intervention tools are needed to facilitate healthy eating behavior, especially when eating away from home. Therefore, we present a field experiment in a restaurant that tested whether providing subtle environmental diet reminders increases low-calorie food choices among both chronic and current dieters. For half of the participants, the menu was supplemented with diet-related words, as reminders of healthy eating and dieting. We recorded customers' choices of low-calorie or high-calorie items from the menu, and we assessed chronic and current dieting. Consistent with our hypotheses, we found that diet reminders increased choices for low-calorie foods, among both chronic and current dieters. After a diet reminder, around half of dieters made a healthy menu choice. This study demonstrates the efficacy of providing subtle diet reminders as a low-cost practical intervention to increase low-calorie food choices among weight-concerned individuals, who are motivated to regulate their eating behavior but have been found to often fail in food-rich environments. Copyright © 2012 Elsevier Ltd. All rights reserved.

  19. Cu-67 Photonuclear Production

    Science.gov (United States)

    Starovoitova, Valeriia; Foote, Davy; Harris, Jason; Makarashvili, Vakhtang; Segebade, Christian R.; Sinha, Vaibhav; Wells, Douglas P.

    2011-06-01

    Cu-67 is considered as one of the most promising radioisotopes for cancer therapy with monoclonal antibodies. Current production schemes using high-flux reactors and cyclotrons do not meet potential market need. In this paper we discuss Cu-67 photonuclear production through the reaction Zn-68(γ,p)Cu-67. Computer simulations were done together with experiments to study and optimize Cu-67 yield in natural Zn target. The data confirms that the photonuclear method has potential to produce large quantities of the isotope with sufficient purity to be used in medical field.

  20. A Coumarin-Based Luminescent Chemosensor for Recognition of Cu(2+) and its In-Situ Complex for CN(-) Sensing via Cu(2+) Displacement Approach.

    Science.gov (United States)

    Mukherjee, Soma; Talukder, Shrabani

    2016-11-22

    A new coumarin based chemosensor has been developed for selective fluorescent recognition of Cu(2+) in MeOH/H2O (4:1, v/v at pH = 7.2 aqueous solution) medium with 1:1 binding stoichiometry. The in-situ prepared Cu(2+) complex displays high selectivity towards CN(-) via Cu(2+) displacement approach with detection limit in the micro molar range. Moreover, in presence of Cu(2+), the receptor exhibits reversible emission change with EDTA and thus offers an interesting property of molecular 'IMPLICATION' logic gate with Cu(2+) and EDTA as chemical inputs.

  1. The Contagion of Interstate Violence: Reminders of Historical Interstate (but Not Intrastate) Violence Increase Support for Future Violence Against Unrelated Third-Party States.

    Science.gov (United States)

    Li, Mengyao; Leidner, Bernhard; Euh, Hyun; Choi, Hoon-Seok

    2016-08-01

    Five experiments investigated the war contagion phenomenon in the context of international relations, hypothesizing that reminders of past inter- (but not intra-) state war will increase support for future, unrelated interstate violence. After being reminded of the Korean War as an interstate rather than intrastate conflict, South Koreans showed stronger support for violent responses to new, unrelated interstate tensions (Study 1). Replicating this war contagion effect among Americans, we demonstrated that it was mediated by heightened perceived threat from, and negative images of, a fictitious country unrelated to the past war (Study 2), and moderated by national glorification (Study 3). Study 4, using another international conflict in the U.S. history, provided further conceptual replication. Finally, Study 5 included a baseline in addition to the inter- versus intrastate manipulation, yielding further support for the generalized effect of past interstate war reminders on preferences for aggressive approaches to new interstate tensions.

  2. Use of a registry-generated audit, feedback, and patient reminder intervention in an internal medicine resident clinic--a randomized trial.

    Science.gov (United States)

    Thomas, Kris G; Thomas, Matthew R; Stroebel, Robert J; McDonald, Furman S; Hanson, Gregory J; Naessens, James M; Huschka, Todd R; Kolars, Joseph C

    2007-12-01

    Disease registries, audit and feedback, and clinical reminders have been reported to improve care processes. To assess the effects of a registry-generated audit, feedback, and patient reminder intervention on diabetes care. Randomized controlled trial conducted in a resident continuity clinic during the 2003-2004 academic year. Seventy-eight categorical Internal Medicine residents caring for 483 diabetic patients participated. Residents randomized to the intervention (n = 39) received instruction on diabetes registry use; quarterly performance audit, feedback, and written reports identifying patients needing care; and had letters sent quarterly to patients needing hemoglobin A1c or cholesterol testing. Residents randomized to the control group (n = 39) received usual clinic education. Hemoglobin A1c and lipid monitoring, and the achievement of intermediate clinical outcomes (hemoglobin A1c audit, feedback, and patient reminder intervention in a resident continuity clinic modestly improved diabetes care processes, but did not influence intermediate clinical outcomes.

  3. Progress of Cu-zeolites catalysts for removal of NO with NH3 selective catalytic reduction technology%Cu基分子筛NH3-SCR脱硝催化剂的研究进展

    Institute of Scientific and Technical Information of China (English)

    张冉冉; 李永红

    2015-01-01

    目前铜基分子筛催化剂在较宽温度窗口内具有良好的SCR活性、高的N2选择性和水热稳定性,成为柴油车尾气净化领域最有应用前景的催化剂.因此对Cu基分子筛Cu-ZSM-5、Cu-SSZ-13和Cu-SAPO-34的脱硝性能进行了对比研究,综述了其活性物种类型、位置与催化活性的关系和这些催化剂的NH3-SCR反应机理.

  4. Antimicrobial Cu-bearing stainless steel scaffolds.

    Science.gov (United States)

    Wang, Qiang; Ren, Ling; Li, Xiaopeng; Zhang, Shuyuan; Sercombe, Timothy B; Yang, Ke

    2016-11-01

    Copper-bearing stainless steel scaffolds with two different structures (Body Centered Cubic and Gyroid labyrinth) at two solid fractions (25% and 40%) were fabricated from both 316L powder and a mixture of 316L and elemental Cu powder using selective laser melting, and relative 316L scaffolds were served as control group. After processing, the antimicrobial testing demonstrated that the 316L-Cu scaffolds presented excellent antimicrobial activity against Escherichia coli and Staphylococcus aureus, and the cell viability assay indicated that there was no cytotoxic effect of 316L-Cu scaffolds on rat marrow mesenchymal stem cells. As such, these have the potential to reduce implant-associated infections. The Cu was also found to homogeneously distribute within the microstructure by scanning electronic microcopy. The addition of Cu would not significantly affect its strength and stiffness compared to 316L scaffold, and the stiffness of all the scaffolds (3-20GPa) is similar to that of bone and much less than that of bulk stainless steel. Consequently, fabrication of such low stiffness porous structures, especially coupled with the addition of antimicrobial Cu, may provide a new direction for medical stainless steels.

  5. Synthesis of a chabazite-supported copper catalyst with full mesopores for selective catalytic reduction of nitrogen oxides at low temperature%具有丰富介孔Cu-SAPO-34催化剂制备及其低温氨气选择性催化还原反应

    Institute of Scientific and Technical Information of China (English)

    刘计省; 刘坚; 赵震; 宋卫余; 韦岳长; 段爱军; 姜桂元

    2016-01-01

    催化剂的物理化学性质。  XRD 测试结果证实, H-Cu-SAPO-34催化剂具有典型的 CHA 结构。 TEM 和 N2吸附-脱附测试结果表明, H-Cu-SAPO-34催化剂具有丰富的介孔结构。 Al-NMR测试结果表明,多种配位的Al物种存在于H-Cu-SAPO-34中。 UV-Vis DRS 测试结果证实了孤立 Cu2+和高分散的 CuO 的存在,没有观察到(Cu-O-Cu)2+和 CuAl2O4物种的存在。 ICP-AES和XPS测试结果表明, H-Cu-SAPO-34催化剂具有相似的Cu含量,并且H-Cu-SAPO-34-20催化剂具有最高的Cu2+含量。 H2-TPR测试结果表明, H-Cu-SAPO-34-20催化剂具有最低的孤立Cu2+还原温度以及最高的孤立Cu2+含量。这可能有利于其NH3-SCR活性提高。同时H2-TPR还表明, H-Cu-SAPO-34催化剂中存在含量不等的孤立Cu+,并且孤立Cu2+是NH3-SCR反应的主要活性中心。 EPR测试结果进一步表明,位于SAPO-34椭球腔内(Site (I))的孤立Cu2+是该反应的主要活性位。  由NO的NH3-SCR反应测试结果来看,相比于普通的Cu/SAPO-34催化剂,具有丰富介孔结构的H-Cu-SAPO-34催化剂呈现出更高的低温催化活性,同时H-Cu-SAPO-34-20催化剂具有最高的低温NH3-SCR催化活性,这与其较高的活性Cu2+含量以及较低的孤立Cu2+还原温度密切相关。动力学测试结果表明,所合成的H-Cu-SAPO-34多级孔催化剂具有相似的活化能(Ea =98 kJ/mol),并且该值远大于普通CHA基SCR催化剂,这意味着介孔的存在确实大大降低了反应物分子在H-Cu-SAPO-34孔道内的扩散阻力,提高了反应物分子与活性位的接触概率,从而提高了其低温NH3-SCR催化性能。%A series of meso‐microporous copper‐supporting chabazite molecular sieve (Cu‐SAPO‐34) catalysts with excellent performance in low‐temperature ammonia selective catalytic reduction (NH3‐SCR) have been synthesized via a one‐pot hydrothermal crystallization method. The physicochemical properties of the

  6. Development of new peptide-based receptor of fluorescent probe with femtomolar affinity for Cu(+) and detection of Cu(+) in Golgi apparatus.

    Science.gov (United States)

    Jung, Kwan Ho; Oh, Eun-Taex; Park, Heon Joo; Lee, Keun-Hyeung

    2016-11-15

    Developing fluorescent probes for monitoring intracellular Cu(+) is important for human health and disease, whereas a few types of their receptors showing a limited range of binding affinities for Cu(+) have been reported. In the present study, we first report a novel peptide receptor of a fluorescent probe for the detection of Cu(+). Dansyl-labeled tripeptide probe (Dns-LLC) formed a 1:1 complex with Cu(+) and showed a turn-on fluorescent response to Cu(+) in aqueous buffered solutions. The dissociation constant of Dns-LLC for Cu(+) was determined to be 12 fM, showing that Dns-LLC had more potent binding affinity for Cu(+) than those of previously reported chemical probes for Cu(+). The binding mode study showed that the thiol group of the peptide receptor plays a critical role in potent binding with Cu(+) and the sulfonamide and amide groups of the probe might cooperate to form a complex with Cu(+). Dns-LLC detected Cu(+) selectively by a turn-on response among various biologically relevant metal ions, including Cu(2+) and Zn(2+). The selectivity of the peptide-based probe for Cu(+) was strongly dependent on the position of the cysteine residue in the peptide receptor part. The fluorescent peptide-based probe penetrated the living RKO cells and successfully detected Cu(+) in the Golgi apparatus in live cells by a turn-on response. Given the growing interest in imaging Cu(+) in live cells, a novel peptide receptor of Cu(+) will offer the potential for developing a variety of fluorescent probes for Cu(+) in the field of copper biochemistry.

  7. A Smartwatch-Based Assistance System for the Elderly Performing Fall Detection, Unusual Inactivity Recognition and Medication Reminding.

    Science.gov (United States)

    Deutsch, Markus; Burgsteiner, Harald

    2016-01-01

    The growing number of elderly people in our society makes it increasingly important to help them live an independent and self-determined life up until a high age. A smartwatch-based assistance system should be implemented that is capable of automatically detecting emergencies and helping elderly people to adhere to their medical therapy. Using the acceleration data of a widely available smartwatch, we implemented fall detection and inactivity recognition based on a smartphone connected via Bluetooth. The resulting system is capable of performing fall detection, inactivity recognition, issuing medication reminders and alerting relatives upon manual activation. Though some challenges, like the dependence on a smartphone remain, the resulting system is a promising approach to help elderly people as well as their relatives to live independently and with a feeling of safety.

  8. A reminder on millisecond timing accuracy and potential replication failure in computer-based psychology experiments: An open letter.

    Science.gov (United States)

    Plant, Richard R

    2016-03-01

    There is an ongoing 'replication crisis' across the field of psychology in which researchers, funders, and members of the public are questioning the results of some scientific studies and the validity of the data they are based upon. However, few have considered that a growing proportion of research in modern psychology is conducted using a computer. Could it simply be that the hardware and software, or experiment generator, being used to run the experiment itself be a cause of millisecond timing error and subsequent replication failure? This article serves as a reminder that millisecond timing accuracy in psychology studies remains an important issue and that care needs to be taken to ensure that studies can be replicated on current computer hardware and software.

  9. The efficacy of motivational counseling and SMS-reminders on daily sitting time in patients with rheumatoid arthritis

    DEFF Research Database (Denmark)

    Esbensen, Bente Appel; Thomsen, Tanja; Hetland, Merete L

    2015-01-01

    , and finally to assess the cost-effectiveness of the intervention. METHODS/DESIGN: For this parallel group randomized trial, 150 patients with RA and at least 5 hours of sitting time per day, will be recruited from a rheumatology outpatient clinic, and block-randomized to the intervention group or the control...... group receiving usual care. The intervention includes: 1) individual motivational counseling (in total 3 sessions) on reduction of daily sitting time in combination with 2) individual Short Text Message Service (SMS) reminders over a 16-week intervention period. Primary outcome is change in daily...... sitting time (minutes) from baseline to 16 weeks measured objectively using an ActivPAL® Activity Monitor. Secondary outcomes include fatigue, pain, physical function, HR-QoL, self-efficacy, costs and cost-effectiveness. Furthermore, anthropometric measures will be included as well as measurement of blood...

  10. Targeted Reminder Phone Calls to Patients at High Risk of No-Show for Primary Care Appointment: A Randomized Trial.

    Science.gov (United States)

    Shah, Sachin J; Cronin, Patrick; Hong, Clemens S; Hwang, Andrew S; Ashburner, Jeffrey M; Bearnot, Benjamin I; Richardson, Calvin A; Fosburgh, Blair W; Kimball, Alexandra B

    2016-12-01

    No-shows, or missed appointments, are a problem for many medical practices. They result in fragmented care and reduce access for all patients. To determine whether telephone reminder calls targeted to patients at high risk of no-show can reduce no-show rates. Single-center randomized controlled trial. A total of 2247 primary care patients in a hospital-based primary care clinic at high risk of no-show (>15 % risk) for their appointment in 7 days. Seven days prior to their appointment, intervention arm patients were placed in a calling queue to receive a reminder phone call from a patient service coordinator. Coordinators were trained to engage patients in concrete planning. All patients received an automated phone call (usual care). Primary outcome was no-show rate. Secondary outcomes included arrival rate, cancellation rate, reschedule rate, time to cancellation, and change in revenue. The no-show rate in the intervention arm (22.8 %) was significantly lower (absolute risk difference -6.4 %, p < 0.01, 95 % CI [-9.8 to -3.0 %]) than that in the control arm (29.2 %). Arrival, cancellation, and reschedule rates did not differ significantly. In the intervention arm, rescheduling and cancellations occurred further in advance of the appointment (mean difference, 0.35 days; 95 % CI [0.07-0.64]; p = 0.01). Reimbursement did not differ significantly. A phone call 7 days prior to an appointment led to a significant reduction in no-shows and increased reimbursement among patients at high risk of no-show. The use of targeted interventions may be of interest to practices taking on increased accountability for population health.

  11. Designed copper-amine complex as an efficient template for one-pot synthesis of Cu-SSZ-13 zeolite with excellent activity for selective catalytic reduction of NOx by NH3.

    Science.gov (United States)

    Ren, Limin; Zhu, Longfeng; Yang, Chengguang; Chen, Yanmei; Sun, Qi; Zhang, Haiyan; Li, Caijin; Nawaz, Faisal; Meng, Xiangju; Xiao, Feng-Shou

    2011-09-21

    Low-cost copper-amine complex was rationally designed to be a novel template for one-pot synthesis of Cu-SSZ-13 zeolites. Proper confirmation and appropriate size make this complex fit well with CHA cages as an efficient template. The products exhibit superior catalytic performance on NH(3)-SCR reaction.

  12. Conversion of Methanol on CuO/H-MOR and CuO/H-ZSM-5 Catalysts.

    Science.gov (United States)

    Aboul-Fotouh, Sameh M K; Hassan, Marwa M I

    2010-12-01

    This paper deals with maximizing dimethyl ether (DME) production from methanol due to its industrial importance as a future diesel fuel. The high acidity and the micro-porous structure of the catalysts encouraged this reaction. Catalysts containg 6% CuO supported on H-ZSM-5 and H-MOR zeolites give high activities for DME production. The 6% CuO/HMOR is more selective for DME production, while the 6% CuO/HZSM-5 is more selective for olefins (ethylene and propylene) formation. The higher acid site strength of CuO/HMOR is the principal factor for DME formation whereas olefins production is more activated on CuO/HZSM-5 due to its narrower pore volume.

  13. Selective catalytic reduction of NO with NH{sub 3} over sol-gel-derived CuO-CeO{sub 2}-MnOx/y-Al{sub 2}O{sub 3} catalysts

    Energy Technology Data Exchange (ETDEWEB)

    Zhao, Q.S.; Sun, L.S.; Xiang, J.; Su, S.; Hu, S. [Huazhong Univ. of Science and Technology, Wuhan, Hubei (China). State Key Laboratory of Coal Combustion

    2008-07-01

    Sulfur dioxide (SO{sub 2}) and nitrogen oxides (NO{sub X}) are major air pollutants. Before emitting flue gas into the atmosphere, these pollutants must be removed using various processes. A sol-gel process has been developed to prepare alumina granular support and catalyst. The sol-gel-derived alumina granules have a large surface area, large pore volume, uniform pore size distribution, and excellent mechanical properties such as attrition resistance and crush strength. This paper discussed an experiment that synthesized two catalysts using the sol-gel oil-drop method. The paper described the experimental procedure and presented the results of the experiment. This included the effect of temperature on the catalytic activity of CuO-CeO{sub 2}-MnOx/y-Al{sub 2}O{sub 3} catalysts; desorption of ammonia (NH{sub 3}) and nitric oxide (NO) on the CuO-CeO{sub 2}-MnOx/y-Al{sub 2}O{sub 3} catalysts; transient response of NH{sub 3} and NO on CuO-CeO{sub 2}-MnOx/y-Al{sub 2}O{sub 3} catalysts; and the reaction kinetics and characterization of CuO-CeO{sub 2}-MnOx/y-Al{sub 2}O{sub 3} catalysts. It was concluded that the CuO-CeO{sub 2}-MnOx/y-Al{sub 2}O{sub 3} catalysts made by the sol-gel method have higher activity and a wider operating temperature range. 17 refs., 1 tab., 9 figs.

  14. Rationale and design of the Randomized Evaluation to Measure Improvements in Non-adherence from Low-Cost Devices (REMIND) trial.

    Science.gov (United States)

    Choudhry, Niteesh K; Krumme, Alexis A; Ercole, Patrick M; Girdish, Charmaine; Isaman, Danielle L; Matlin, Olga S; Brennan, Troyen A; Shrank, William H; Franklin, Jessica M

    2015-07-01

    Long-term adherence to prescription medications for the treatment of chronic disease remains low. While there are many contributors to suboptimal medication use, simple forgetfulness is widely believed to be central. Relatively simple devices may be a particularly cost-efficient and scalable way to promote adherence, however limited data exists about their ability to improve adherence in real-world settings. The REMIND trial is a prospective, intent-to-treat randomized control trial to evaluate the impact on medication adherence of three simple, low-cost devices (Take-N-Slide(™), the RxTimerCap(™), and a standard pillbox). In March 2014, we enrolled 53,480 individuals 18 to 64 years old taking one to three medications to treat chronic disease whose prescription drug benefits were administered by CVS Caremark. The study's primary outcome is optimal adherence over the 12-month period after randomization. Using a randomization ratio of 1:2 between control and each intervention arm, the study has more than 80% power with an alpha of 5% to detect a 1% difference in the rate of optimal adherence between intervention and control groups and across intervention arms. The REMIND trial is the first randomized study to rigorously evaluate the impact of simple, low-cost reminder devices on medication adherence. The results will inform comparative cost effectiveness studies of reminder systems in improving medication adherence and clinical outcomes. Copyright © 2015 Elsevier Inc. All rights reserved.

  15. Impact of late-to-refill reminder calls on medication adherence in the Medicare Part D population: evaluation of a randomized controlled study

    Science.gov (United States)

    Taitel, Michael S; Mu, Ying; Gooptu, Angshuman; Lou, Youbei

    2017-01-01

    Objectives This study evaluates a nationwide pharmacy chain’s late-to-refill (LTR) reminder program that entails local pharmacists placing reminder calls to Medicare Part D patients. Methods We conducted a randomized controlled study among 735,218 patients who exhibited nonadherent behavior by not refilling a maintenance medication 3 days from an expected refill date. Patients were randomly assigned to an intervention group who received LTR reminder calls or to a control group. We used Walgreens pharmaceutical claims data from 2015 to estimate the impact of LTR calls on short-term and annual adherence. Results The initial refill rate within the first 14 days of the expected refill date significantly increased in the intervention group by 22.8% (6.09 percentage points) compared to the control group (Pstudy suggest that LTR reminder calls increased adherence for Medicare Part D patients who are late in refilling their medications and therefore have the potential to reduce their risk for hospitalization and health care costs. Additionally, the intervention increased the number of patients with PDC ≥80% by ~3%, positively impacting Medicare Part D plan quality rating. PMID:28280310

  16. Drinker prototype alteration and cue reminders as strategies in a tailored Web-based intervention reducing adults' alcohol consumption: Randomized controlled trial

    NARCIS (Netherlands)

    B. van Lettow (Britt); H. de Vries (Hein); A. Burdorf (Alex); B.J.F. Boon (Brigitte); P. van Empelen (Pepijn)

    2015-01-01

    textabstractBackground: Excessive alcohol use is a prevalent and worldwide problem. Excessive drinking causes a significant burden of disease and is associated with both morbidity and excess mortality. Prototype alteration and provision of a cue reminder could be useful strategies to enhance the eff

  17. Design of a randomized trial to evaluate the influence of mobile phone reminders on adherence to first line antiretroviral treatment in South India - the HIVIND study protocol

    Directory of Open Access Journals (Sweden)

    Kumarasamy Nagalingeswaran

    2010-03-01

    Full Text Available Abstract Background Poor adherence to antiretroviral treatment has been a public health challenge associated with the treatment of HIV. Although different adherence-supporting interventions have been reported, their long term feasibility in low income settings remains uncertain. Thus, there is a need to explore sustainable contextual adherence aids in such settings, and to test these using rigorous scientific designs. The current ubiquity of mobile phones in many resource-constrained settings, make it a contextually appropriate and relatively low cost means of supporting adherence. In India, mobile phones have wide usage and acceptability and are potentially feasible tools for enhancing adherence to medications. This paper presents the study protocol for a trial, to evaluate the influence of mobile phone reminders on adherence to first-line antiretroviral treatment in South India. Methods/Design 600 treatment naïve patients eligible for first-line treatment as per the national antiretroviral treatment guidelines will be recruited into the trial at two clinics in South India. Patients will be randomized into control and intervention arms. The control arm will receive the standard of care; the intervention arm will receive the standard of care plus mobile phone reminders. Each reminder will take the form of an automated call and a picture message. Reminders will be delivered once a week, at a time chosen by the patient. Patients will be followed up for 24 months or till the primary outcome i.e. virological failure, is reached, whichever is earlier. Self-reported adherence is a secondary outcome. Analysis is by intention-to-treat. A cost-effectiveness study of the intervention will also be carried out. Discussion Stepping up telecommunications technology in resource-limited healthcare settings is a priority of the World Health Organization. The trial will evaluate if the use of mobile phone reminders can influence adherence to first

  18. SMSaúde: Evaluating Mobile Phone Text Reminders to Improve Retention in HIV Care for Patients on Antiretroviral Therapy in Mozambique.

    Science.gov (United States)

    Joseph Davey, Dvora; Nhavoto, José António; Augusto, Orvalho; Ponce, Walter; Traca, Daila; Nguimfack, Alexandre; Palha de Sousa, Cesar

    2016-10-01

    We evaluated whether regular mobile phone text reminders improved patients' retention in antiretroviral therapy (ART) care in Mozambique. SMSaúde was a randomized control trial of HIV-infected patients on ART who received regular text message reminder vs. standard of care at 3 public health facilities in Maputo Province, Mozambique. The primary outcome was retention in HIV care. Between November 2011 and March 2012, 830 eligible HIV-infected patients on ART were randomized 1:1 to the text reminder intervention or standard of care. We used Kaplan-Meier estimators and log-rank tests to compare proportions of patients who received SMS reminders who were retained in HIV care compared to the control group who received standard of care. Post hoc analyses were performed using Cox proportional hazards models stratified by urban/rural facility and when initiated ART (≤3 months vs. >3 months). Hazard ratios and confidence intervals (CIs) are reported. Analysis was with intention to treat. Patients who received text messages had lower attrition from HIV care at 12 months, though the difference was nonsignificant (RR: 0.68, 95% CI: 0.41 to 1.13). Among urban patients, text messages improved retention in HIV care (RR: 0.54, 95% CI: 0.31 to 0.95). Intervention patients newly initiated on ART (<3 months) had lower attrition than control patients (HR: 0.54; 95% CI: 0.23 to 0.91), especially urban newly initiated patients (HR: 0.20, 95% CI: 0.06 to 0.64). Text messages had no effect on retention among rural patients. Text messages did not improve retention in HIV care for all patients on ART but improved retention in care of urban patients and those who recently started ART and received text reminders compared with standard of care.

  19. Impact of late-to-refill reminder calls on medication adherence in the Medicare Part D population: evaluation of a randomized controlled study

    Directory of Open Access Journals (Sweden)

    Taitel MS

    2017-02-01

    Full Text Available Michael S Taitel, Ying Mu, Angshuman Gooptu, Youbei Lou Health Analytics, Research & Reporting, Walgreen Co., Deerfield, IL, USA Objectives: This study evaluates a nationwide pharmacy chain’s late-to-refill (LTR reminder program that entails local pharmacists placing reminder calls to Medicare Part D patients. Methods: We conducted a randomized controlled study among 735,218 patients who exhibited nonadherent behavior by not refilling a maintenance medication 3 days from an expected refill date. Patients were randomly assigned to an intervention group who received LTR reminder calls or to a control group. We used Walgreens pharmaceutical claims data from 2015 to estimate the impact of LTR calls on short-term and annual adherence. Results: The initial refill rate within the first 14 days of the expected refill date significantly increased in the intervention group by 22.8% (6.09 percentage points compared to the control group (P<0.001. The proportion of days covered (PDC in the intervention group increased significantly by 1.5% (0.856 percentage points relative to the control group (P<0.001 over 365 days. Patients in the intervention group were significantly more adherent (PDC ≥80% by 3% (0.97 percentage points compared to the control group (P<0.001. Over a 270-day follow-up period, persistence significantly increased by 2.15 days in the intervention group (P<0.001. Conclusion: Results from this study suggest that LTR reminder calls increased adherence for Medicare Part D patients who are late in refilling their medications and therefore have the potential to reduce their risk for hospitalization and health care costs. Additionally, the intervention increased the number of patients with PDC ≥80% by ~3%, positively impacting Medicare Part D plan quality rating. Keywords: reminder system, tailored intervention, Medicare Part D, adherence, persistence

  20. Cu(i)/Fe(iii)-Catalyzed C-P cross-coupling of styrenes with H-phosphine oxides: a facile and selective synthesis of alkenylphosphine oxides and β-ketophosphonates.

    Science.gov (United States)

    Gu, Jian; Cai, Chun

    2017-05-16

    Cu(i)/Fe(iii)-Catalyzed phosphorylation and oxyphosphorylation of styrenes with H-phosphonates which can be controlled by varying the reaction temperature are developed. This study offers a new and expedient strategy for the synthesis of useful alkenylphosphine oxides and β-ketophosphonates in satisfactory yields. Moreover, the transformation is proposed to proceed via a radical process and exhibits a broad substrate scope and good functional group tolerance.