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Sample records for activation analysis investigation

  1. Investigation of a medieval sword using photon activation analysis

    International Nuclear Information System (INIS)

    An ancient sword was examined for indications of forgery or, if authentic, any later processing or changes, e.g. replacement of parts of the weapon. Radiochemical as well as non-destructive analyses using high energy photon activation were used as analytical techniques. Metal parts of the hilt were analysed radiochemically and instrumentally whereas the blade was analysed non-destructively. Metallurgical investigations (hardness measurements, microstructure analysis) performed in parallel are also briefly described. No evidence of non-authenticity was found, which agrees well with the results of stylistical and weapon-scientific investigation carried out by an expert of ancient weaponry. (author) 20 refs.; 1 fig.; 2 tabs

  2. Neutron activation analysis: a powerful tool in provenance investigations

    International Nuclear Information System (INIS)

    It is well known that neutron activation analysis (NAA), both instrumental and destructive, allows the simultaneous determination of a number of elements, mostly trace elements, with high levels of precision and accuracy. These peculiar properties of NAA are very useful when applied to provenance studies, i.e. to the identification of the origin of raw materials with which artifacts had been manufactured in ancient times. Data reduction by statistical procedures, especially multivariate analysis techniques, provides a statistical 'fingerprint' of investigated materials, both raw materials and archaeological artifacts, that, upon comparison, allows the identification of the provenance of prime matters used for artifact manufacturing. Thus information on quarries and flows exploitation in the antiquity, on technological raw materials processing, on trade routes and about the circulation of fakes, can be obtained. In the present paper two case studies are reported. The first one deals with the identification of the provenance of clay used to make ceramic materials, mostly bricks and tiles, recovered from the excavation of a Roman 'villa' in Lomello (Roman name Laumellum) and of Roman settlings in Casteggio (Roman name Clastidium). Both sites are located in the Province of Pavia in areas called Lomellina and Oltrepo respectively. The second one investigates the origin of the white marble used to build medieval arks, Carolingian age, located in the church of San Felice, now property of the University of Pavia. Experimental set-up, analytical results and data reduction procedures are presented and discussed. (author)

  3. Evolution & Phylogenetic Analysis: Classroom Activities for Investigating Molecular & Morphological Concepts

    Science.gov (United States)

    Franklin, Wilfred A.

    2010-01-01

    In a flexible multisession laboratory, students investigate concepts of phylogenetic analysis at both the molecular and the morphological level. Students finish by conducting their own analysis on a collection of skeletons representing the major phyla of vertebrates, a collection of primate skulls, or a collection of hominid skulls.

  4. Neutron Activation Analysis for investigation of elemental composition of Amarantus

    International Nuclear Information System (INIS)

    In this work instrumental neutron activation analysis is applied for the characterization of the elemental composition of Amaranthus seeds, known in the prehistorical period, a tropical plant with promising nutritional and economic value. The characterization is enriched by the results of radiochemical neutron activation analysis for cobalt, molybdenum and uranium content. The comparison of the results, for three sorts of edible flour, commercially available: Soya Flour, Corn Bean Flour and Amaranthus Flour, is presented. The validation of the analytical methods used was carried out on the basis of participation in the interlaboratory comparison organized by the INCT (INCT-TL-1, INCT-MPH-2) and by NIST (SRM 1575a). (author)

  5. Neutron activation analysis in the investigation of pseudomonas to mercury

    International Nuclear Information System (INIS)

    The aim of this work was to investigate the resistance to mercury in Pseudomonas. The measurements were performed by using neutron activation technique. The TRIGA MARK 1-IPE-R1 reactor was used as the irradiation facility, and the nuclide Hg202 as target element. The experimental results showed that cultures of Pseudomonas during the logarithmic growing phase, have a significant volatilization of the Hg, while during the stationary phase, they absorb and retain this metal. (author)

  6. Body Massage Performance Investigation by Brain Activity Analysis

    Directory of Open Access Journals (Sweden)

    Kang-Ming Chang

    2012-01-01

    Full Text Available Massage has been widely applied to improve health and reduce stress. However, the performance difference between hands-on treatment and treatment by mechanical devices has been little mentioned. Therefore, the main aim of this paper is to investigate a subject's EEG performance under massage treatment applied by hand and treatment applied by mechanical devices. Massage was applied to four acupoints for three minutes each. The massage acupoint sequence was from left Jian-wai-yu, right Jian-wai-yu, left Zuo-fei-yu, and finally right Zuo-fei-yu. An EEG system of 32 channels was used. Twenty-four volunteers, mainly college students, were enrolled. EEG rhythm powers of each massage sessions were derived. Two-way ANOVA revealed that there were also significant interactions between the massage stage and the massage type on delta (P<0.01, theta (P<0.05, and beta rhythms (P<0.01, and there were significant differences at different stages for the mechanical massage group (F=5.557, P<0.01. The mechanical massage group had more significant differences than the hands-on group for stage coherence of around coherence on alpha rhythm. Further rhythm power scalp topography between two massage methods is also investigated.

  7. Neutron-activation analysis for investigation of biochemical manganese in soils cotton soweol zone of Uzbekistan

    International Nuclear Information System (INIS)

    Full text: For many years we neutron activation analysis of soils sampled from different areas of landscape-geochemical regions of Uzbekistan including zone of extreme ecological catastrophe of Aral. Content of manganese and some other elements in the 'soil-cotton' system was investigated. Neutron-activation method of manganese determining with productivity up to 400 samples on shift with detection limit of 1,1 10-5 % and discrepancies not more than 10%. Was developed extremely uniform distribution of manganese in cotton sowed soils of the Republic (340-1800mg/kg) is determined. Practically all soils of cotton-sowed zone of Republic are with lack of manganese. Distribution of manganese on soil profile of separate organs of cotton (leaves seeds etc.) was studied. Correlation between gross concentration of manganese and its active part extracted by distilled water on the basis of quantity analysis was found. Successive comparison of gross content of manganese in the soil with crop capacity of cotton in different zones of Republic made it possible to find interconnection between these quantities, which proves necessity of using micro-additions of manganese in the soils where its low concentration is detected

  8. Investigation of therapeutic potentials of some selected medicinal plants using neutron activation analysis

    Science.gov (United States)

    Abubakar, Sani; Usman, Ahmed Rufa'i.; Isa, Nasiru Fage; Khandaker, Mayeen Uddin; Abubakar, Nuraddeen

    2015-04-01

    Series of attempts were made to investigate concentrations of trace elements and their therapeutic properties in various medicinal plants. In this study, samples of some commonly used plants were collected from Bauchi State, Nigeria. They includes leaves of azadirachta indica (neem), Moringa Oleifera (moringa), jatropha curcas (purgin Nut), guiera senegalensis (custard apple) and anogeissus leiocarpus (African birch). These samples were analyzed for their trace elements contents with both short and long irradiation protocols of Instrumental Neutron Activation Analysis (INAA) at Nigerian Research Reactor-1 (NIRR-1) of Ahmadu Bello University, Zaria, Nigeria. The level of trace elements found varies from one sample to another, with some reported at hundreds of mg/Kg dry weight. The results have been compared with the available literature data. The presence of these trace elements indicates promising potentials of these plants for relief of certain ailments.

  9. Investigation of therapeutic potentials of some selected medicinal plants using neutron activation analysis

    Energy Technology Data Exchange (ETDEWEB)

    Abubakar, Sani; Isa, Nasiru Fage [Bayero University, Kano Nigeria (Nigeria); Usman, Ahmed Rufa’i [University of Malaya, Kuala Lumpur (Malaysia); Umaru Musa Yar’adua University, Katsina Nigeria (Nigeria); Khandaker, Mayeen Uddin [University of Malaya, Kuala Lumpur (Malaysia); Abubakar, Nuraddeen [Center for Energy Research and Training, Ahmadu Bello University, Zaria Nigeria (Nigeria)

    2015-04-24

    Series of attempts were made to investigate concentrations of trace elements and their therapeutic properties in various medicinal plants. In this study, samples of some commonly used plants were collected from Bauchi State, Nigeria. They includes leaves of azadirachta indica (neem), Moringa Oleifera (moringa), jatropha curcas (purgin Nut), guiera senegalensis (custard apple) and anogeissus leiocarpus (African birch). These samples were analyzed for their trace elements contents with both short and long irradiation protocols of Instrumental Neutron Activation Analysis (INAA) at Nigerian Research Reactor-1 (NIRR-1) of Ahmadu Bello University, Zaria, Nigeria. The level of trace elements found varies from one sample to another, with some reported at hundreds of mg/Kg dry weight. The results have been compared with the available literature data. The presence of these trace elements indicates promising potentials of these plants for relief of certain ailments.

  10. Neutron activation analysis technique for the investigation of environmental contamination with 129I

    International Nuclear Information System (INIS)

    A neutron activation technique is described which does not require specialized apparatus or immediate access to irradiation facilities, but is sufficiently sensitive to measure 129I at the levels encountered around the BNFL nuclear fuel reprocessing plant at Sellafield in west Cumbria, UK. The method allows analysis of a wide range of media and is therefore well suited to environmental investigations. One such application is described in which the deposition pattern of 129I in west Cumbria has been measured, and hence the importance of transfer from sea as a route of terrestrial contamination has been assessed. The current program of research is also described briefly. This involves measurement of 129I in a range of media important in the human food chain and aims to elucidate transfer mechanisms. 4 references, 2 figures

  11. Investigation of the Activity of the Microorganisms in a Reblochon-Style Cheese by Metatranscriptomic Analysis.

    Science.gov (United States)

    Monnet, Christophe; Dugat-Bony, Eric; Swennen, Dominique; Beckerich, Jean-Marie; Irlinger, Françoise; Fraud, Sébastien; Bonnarme, Pascal

    2016-01-01

    The microbial communities in cheeses are composed of varying bacteria, yeasts, and molds, which contribute to the development of their typical sensory properties. In situ studies are needed to better understand their growth and activity during cheese ripening. Our objective was to investigate the activity of the microorganisms used for manufacturing a surface-ripened cheese by means of metatranscriptomic analysis. The cheeses were produced using two lactic acid bacteria (Streptococcus thermophilus and Lactobacillus delbrueckii ssp. bulgaricus), one ripening bacterium (Brevibacterium aurantiacum), and two yeasts (Debaryomyces hansenii and Geotrichum candidum). RNA was extracted from the cheese rinds and, after depletion of most ribosomal RNA, sequencing was performed using a short-read sequencing technology that generated ~75 million reads per sample. Except for B. aurantiacum, which failed to grow in the cheeses, a large number of CDS reads were generated for the inoculated species, making it possible to investigate their individual transcriptome over time. From day 5 to 35, G. candidum accounted for the largest proportion of CDS reads, suggesting that this species was the most active. Only minor changes occurred in the transcriptomes of the lactic acid bacteria. For the two yeasts, we compared the expression of genes involved in the catabolism of lactose, galactose, lactate, amino acids, and free fatty acids. During ripening, genes involved in ammonia assimilation and galactose catabolism were down-regulated in the two species. Genes involved in amino acid catabolism were up-regulated in G. candidum from day 14 to day 35, whereas in D. hansenii, they were up-regulated mainly at day 35, suggesting that this species catabolized the cheese amino acids later. In addition, after 35 days of ripening, there was a down-regulation of genes involved in the electron transport chain, suggesting a lower cellular activity. The present study has exemplified how

  12. Investigation of the Activity of the Microorganisms in a Reblochon-Style Cheese by Metatranscriptomic Analysis.

    Science.gov (United States)

    Monnet, Christophe; Dugat-Bony, Eric; Swennen, Dominique; Beckerich, Jean-Marie; Irlinger, Françoise; Fraud, Sébastien; Bonnarme, Pascal

    2016-01-01

    The microbial communities in cheeses are composed of varying bacteria, yeasts, and molds, which contribute to the development of their typical sensory properties. In situ studies are needed to better understand their growth and activity during cheese ripening. Our objective was to investigate the activity of the microorganisms used for manufacturing a surface-ripened cheese by means of metatranscriptomic analysis. The cheeses were produced using two lactic acid bacteria (Streptococcus thermophilus and Lactobacillus delbrueckii ssp. bulgaricus), one ripening bacterium (Brevibacterium aurantiacum), and two yeasts (Debaryomyces hansenii and Geotrichum candidum). RNA was extracted from the cheese rinds and, after depletion of most ribosomal RNA, sequencing was performed using a short-read sequencing technology that generated ~75 million reads per sample. Except for B. aurantiacum, which failed to grow in the cheeses, a large number of CDS reads were generated for the inoculated species, making it possible to investigate their individual transcriptome over time. From day 5 to 35, G. candidum accounted for the largest proportion of CDS reads, suggesting that this species was the most active. Only minor changes occurred in the transcriptomes of the lactic acid bacteria. For the two yeasts, we compared the expression of genes involved in the catabolism of lactose, galactose, lactate, amino acids, and free fatty acids. During ripening, genes involved in ammonia assimilation and galactose catabolism were down-regulated in the two species. Genes involved in amino acid catabolism were up-regulated in G. candidum from day 14 to day 35, whereas in D. hansenii, they were up-regulated mainly at day 35, suggesting that this species catabolized the cheese amino acids later. In addition, after 35 days of ripening, there was a down-regulation of genes involved in the electron transport chain, suggesting a lower cellular activity. The present study has exemplified how

  13. Investigation of the activity of the microorganisms in a Reblochon-style cheese by metatranscriptomic analysis

    Directory of Open Access Journals (Sweden)

    Christophe eMonnet

    2016-04-01

    Full Text Available The microbial communities in cheeses are composed of varying bacteria, yeasts, and molds, which contribute to the development of their typical sensory properties. In situ studies are needed to better understand their growth and activity during cheese ripening. Our objective was to investigate the activity of the microorganisms used for manufacturing a surface-ripened cheese by means of metatranscriptomic analysis. The cheeses were produced using two lactic acid bacteria (Streptococcus thermophilus and Lactobacillus delbrueckii ssp. bulgaricus, one ripening bacterium (Brevibacterium aurantiacum, and two yeasts (Debaryomyces hansenii and Geotrichum candidum. RNA was extracted from the cheese rinds and, after depletion of most ribosomal RNA, sequencing was performed using a short-read sequencing technology that generated approximately 75 million reads per sample. Except for Brevibacterium aurantiacum, which failed to grow in the cheeses, a large number of CDS reads were generated for the inoculated species, making it possible to investigate their individual transcriptome over time. From day 5 to day 35, G. candidum accounted for the largest proportion of CDS reads, suggesting that this species was the most active. Only minor changes occurred in the transcriptomes of the lactic acid bacteria. For the two yeasts, we compared the expression of genes involved in the catabolism of lactose, galactose, lactate, amino acids and free fatty acids. During ripening, genes involved in ammonia assimilation and galactose catabolism were down-regulated in the two species. Genes involved in amino acid catabolism were up-regulated in G. candidum from day 14 to day 35, whereas in D. hansenii, they were up-regulated mainly at day 35, suggesting that this species catabolized the cheese amino acids later. In addition, after 35 days of ripening, there was a down-regulation of genes involved in the electron transport chain, suggesting a lower cellular activity. The

  14. Detailed investigation of Long-Period activity at Campi Flegrei by Convolutive Independent Component Analysis

    Science.gov (United States)

    Capuano, P.; De Lauro, E.; De Martino, S.; Falanga, M.

    2016-04-01

    This work is devoted to the analysis of seismic signals continuously recorded at Campi Flegrei Caldera (Italy) during the entire year 2006. The radiation pattern associated with the Long-Period energy release is investigated. We adopt an innovative Independent Component Analysis algorithm for convolutive seismic series adapted and improved to give automatic procedures for detecting seismic events often buried in the high-level ambient noise. The extracted waveforms characterized by an improved signal-to-noise ratio allows the recognition of Long-Period precursors, evidencing that the seismic activity accompanying the mini-uplift crisis (in 2006), which climaxed in the three days from 26-28 October, had already started at the beginning of the month of October and lasted until mid of November. Hence, a more complete seismic catalog is then provided which can be used to properly quantify the seismic energy release. To better ground our results, we first check the robustness of the method by comparing it with other blind source separation methods based on higher order statistics; secondly, we reconstruct the radiation patterns of the extracted Long-Period events in order to link the individuated signals directly to the sources. We take advantage from Convolutive Independent Component Analysis that provides basic signals along the three directions of motion so that a direct polarization analysis can be performed with no other filtering procedures. We show that the extracted signals are mainly composed of P waves with radial polarization pointing to the seismic source of the main LP swarm, i.e. a small area in the Solfatara, also in the case of the small-events, that both precede and follow the main activity. From a dynamical point of view, they can be described by two degrees of freedom, indicating a low-level of complexity associated with the vibrations from a superficial hydrothermal system. Our results allow us to move towards a full description of the complexity of

  15. An investigation of the impurities in native gold by neutron-activation analysis

    International Nuclear Information System (INIS)

    Instrumental and radiochemical methods of neutron-activation analysis, developed for the determination of major, minor, and trace impurities in native gold, are described. The gold was obtained from Witwatersrand reefs and from deposits in the Barberton area. It was extracted by decomposition of the ore in cold hydrofluoric acid. Quantitative results are presented for 14 elements found in native gold, and the significance of these elements in relation to the distribution of gold is discussed. The results suggest that there are geochemical differences in native gold from various reefs and deposits

  16. Archaeometric investigation of medieval Bulgarian glasses and sgraffito ceramics by neutron activation analysis

    International Nuclear Information System (INIS)

    Instrumental neutron activation analysis was used to determine the content of Au, Ba, Ca, Ce, Cl, Cr, Co, Cs, Cu, Eu, Fe, Hf, La, Lu, Mn, Na, Rb, Sc, Sm, Sr, Ta, Tb, Th, Ti, U, Sb, V and Yb in glass samples excavated from medieval glassworkshops in Pliska and Preslav and in 20 glass finds from Preslav. Sgraffito ceramic samples excavated in Veliko Tarnovo were also analysed and the elements Al, As, Au, Ba, Br, Ce, Co, Cr, Cs, Dy, Eu, Fe, Hf, K, La, Lu, Mg, Mn, Na, Nd, Rb, Sb, Sc, Si, Sm, Ta, Tb, Th, Ti, U, V and Yb were determined. In order to localize the production site of the archaeological finds, the results from the analysis were subjected to cluster analysis, and stepwise discriminant analysis using the program package BMDP. A variety of the production of the medieval glass workshop in Preslav was identified and evaluated. It was proved that a part of the sgraffito ceramics samples have been produced in one and the same place and that the chemical composition might be successfully used to differentiate between the production of two workshops

  17. Activation analysis

    International Nuclear Information System (INIS)

    The neutron activation analysis, which appears to be in limits for further advance, is the most suitable for providing information on the principal as well as the microcomponents in any sample of solid form. Then, instrumental activation analysis is capable of determination of far many elements in various samples. Principally on the neutron activation analysis, the following are described in literature survey from 1982 to middle 1984: bibliography, review, data collection, etc.; problems in spectral analysis and measurement; activation analysis with neutrons; charged particle and photo-nucleus reactions; chemical separation, isotopic dilution activation analysis; molecular activation analysis; standard materials; life and its relation samples; environmental, food, court trial and archaeological samples; space and earth sciences. (Mori, K.)

  18. Investigation of the Photocatalytic Activity of ZnO Nanowires: Substrate Effect and Kinetics Analysis

    Directory of Open Access Journals (Sweden)

    Jan-Hau Chang

    2014-01-01

    Full Text Available The photocatalytic activity of substrate-supported ZnO nanowires is investigated with a focus on the substrate effect and the photodegradation kinetics. The employed NWs are grown on various substrates by thermal evaporation and a 50 μM rhodamine B solution is used as the target solution. It is found that the photocatalytic activity is facilitated by using a conductive substrate and such a result can be reasonably attributed to the improvement of charge separation. The photodegradation is found to follow a zeroth-order kinetics at high concentrations and a first-order kinetics at low concentrations with a transition at around 10 μM. The present observation is opposed to the commonly accepted first-order kinetics. Degradation constants of 0.58 μM·min−1 for the zeroth-order and 0.028 min−1 for the first-order have been achieved. The first-order constant also compares favorably with reported values.

  19. Application of Epithermal Neutron Activation Analysis to Investigate Accumulation and Adsorption of Mercury by Spirulina platensis Biomass

    CERN Document Server

    Mosulishvili, L M; Khizanishvili, A I; Frontasyeva, M V; Kirkesali, E I; Aksenova, N G

    2004-01-01

    Epithermal neutron activation analysis was used to study interaction of blue-green alga Spirulina platensis with toxic metal mercury. Various concentrations of Hg(II) were added to cell cultures in a nutrient medium. The dynamics of accumulation of Hg was investigated over several days in relation to Spirulina biomass growth. The process of Hg adsorption by Spirulina biomass was studied in short-time experiments. The isotherm of adsorption was carried out in Freindlich coordinates. Natural Spirulina biomass has potential to be used in the remediation of sewage waters at Hg concentrations \\sim 100 {\\mu}g/l.

  20. Investigation of Kpong carbonatite as a potential source for rare earth elements (REEs) using instrumental neutron activation analysis (INAA)

    Energy Technology Data Exchange (ETDEWEB)

    Hayford, M.S.; Akiti, T.T.; Serfor-Armah, Y.; Dampare, S.B. [Ghana Univ., Accra (Ghana). School of Nuclear and Allied Sciences; Ghana Atomic Energy Commission (GAEC), Legon-Accra (Ghana). Nuclear Chemistry and Environmental Research Centre

    2013-07-01

    Instrumental neutron activation analysis (INAA) was used to investigate REEs in carbonatite from Kpong southeastern, Ghana. Total rare earth element (TREEs) obtain were in the range of 540 mg/kg to 705 mg/kg. The total number of rare earth elements (REEs) determined by INAA in the carbonatite rocks from Kpong were 11, namely; La, Ce, Nd, Sm, Eu, Tb, Dy, Ho, Tm, Yb, Lu. The INAA results from the carbonatite show a high enrichment of light rare earth elements (LREEs) deposits, marking the Kpong carbonatite as a potential REE source. (orig.)

  1. Epithermal neutrons activation analysis, radiochemical and radiometric investigations of evaporitic deposits of Slanic-Prahova (Romania) salt mine

    International Nuclear Information System (INIS)

    Three highly sensitive analytical methods: epithermal neutron activation analysis (ENAA), radiometric assay and UV/Vis spectroscopy were used to investigate the elemental composition of both halite and mineral fractions (sediments) of salt collected from the Slanic-Prahova salt mine, near the location of Low Background Radiation Lab. For halite with all three methods and within experimental uncertainties, it was not possible to observe the presence of any natural radioactive elements. For the mineral fraction both radiometric and ENAA showed the presence of 40K, 232Th and 238U in concentrations comparable to the upper continental core (UCC). The same was true for the distribution in the mineral fraction of 7 other major (Na, Al, Cl, K, Ca, Ti and Fe) and 29 trace elements (Sc, Cr, V, Mn, Ni, Co, Zn, Cu, As, Br, Rb, Sr, Zr, Mo, Sn, Sb, Cs, Ba, La, Ce, Ne, Eu, Sm, Tb, Hf, Ta, W, Th, U) as determined by epithermal neutron activation analysis (ENAA), which demonstrates a continental origin of the sediments in the existing salt deposit. (orig.)

  2. Epithermal neutrons activation analysis, radiochemical and radiometric investigations of evaporitic deposits of Slanic-Prahova (Romania) salt mine

    Energy Technology Data Exchange (ETDEWEB)

    Cristache, C.; Simion, C.A.; Margineanu, R.M. [National Inst. of Research and Development for Physics and Nuclear Engineering ' ' Horia - Hulubei' ' , Magurele (Ilfov) (Romania); Culicov, O.A.; Frontasyeva, M.V. [Joint Inst. of Nuclear Research, Dubna (Russian Federation); Matei, M. [National Society of Salt SALROM SA, Bucharest (Romania); Duliu, O.G. [Univ. of Bucharest, Dept. of Atomic and Nuclear Physics, Magurele (Ilfov) (Romania); National Inst. for Research and Development in Electrical Engineering, Bucharest (Romania)

    2009-07-01

    Three highly sensitive analytical methods: epithermal neutron activation analysis (ENAA), radiometric assay and UV/Vis spectroscopy were used to investigate the elemental composition of both halite and mineral fractions (sediments) of salt collected from the Slanic-Prahova salt mine, near the location of Low Background Radiation Lab. For halite with all three methods and within experimental uncertainties, it was not possible to observe the presence of any natural radioactive elements. For the mineral fraction both radiometric and ENAA showed the presence of {sup 40}K, {sup 232}Th and {sup 238}U in concentrations comparable to the upper continental core (UCC). The same was true for the distribution in the mineral fraction of 7 other major (Na, Al, Cl, K, Ca, Ti and Fe) and 29 trace elements (Sc, Cr, V, Mn, Ni, Co, Zn, Cu, As, Br, Rb, Sr, Zr, Mo, Sn, Sb, Cs, Ba, La, Ce, Ne, Eu, Sm, Tb, Hf, Ta, W, Th, U) as determined by epithermal neutron activation analysis (ENAA), which demonstrates a continental origin of the sediments in the existing salt deposit. (orig.)

  3. The neutron activation analysis in the study of Langmuir-Blodgett multilayers composition - relation to other methods of investigation

    International Nuclear Information System (INIS)

    The features of the neutron activation analysis (NAA) used in the study of Langmuir-Blodget (LB) multilayers composition are compared with the following analytical techniques: radiometry, spectrophotometry, IR-spectroscopy and electron spectroscopy for chemical analysis. A very important advantage of NAA is possibility for the simultaneous determination of all the inorganic ions in the sample, especially when LB multilayers serve as models of biological systems. Thus competitive reactions of bivalent and monovalent cations (Ca2+/Na+, K+) or specific reactions of counterions of equal charge (Zn2+/Cd2+. HPO42-/HAsO42-, SO42-/CrO42-) can be investigated with great accuracy. The parallel application of onother analytical technique is necessary when the structure of the multilayers, their stability, the molecular interactions or the binding energies of the elements are to be studied. An attempt to classify roughly the applicability of each method to some particular counterions is given. Such characteristics as the lower limit of detection, simplicity of the analysis accessibility, rapidity, etc. have been taken into consideration

  4. Trace elements of normal, benign hypertrophic and cancerous tissues of the Human prostate gland investigated by neutron activation analysis

    Energy Technology Data Exchange (ETDEWEB)

    Zaichick, Sofia, E-mail: s-zaichick@northwestern.edu [Radionuclide Diagnostics Department, Medical Radiological Research Centre, Russian Academy of Medical Sciences, Koroleva Street- 4, Obninsk 249020, Kaluga Region (Russian Federation); Zaichick, Vladimir, E-mail: vezai@obninsk.com [Radionuclide Diagnostics Department, Medical Radiological Research Centre, Russian Academy of Medical Sciences, Koroleva Street- 4, Obninsk 249020, Kaluga Region (Russian Federation)

    2012-01-15

    The Ag, Co, Cr, Fe, Hg, Rb, Sb, Sc, Se, and Zn contents in normal (n=37), benign hypertrophic (n=43), and cancerous tissues (n=60) of the human prostate gland were investigated by neutron activation analysis. Mean values (M{+-}S{Epsilon}{Mu}) for content (mg/kg, dry weight basis) of trace elements in the normal tissue were: Ag-0.048{+-}0.009, Co-0.045{+-}0.004, Cr-0.53{+-}0.08, Fe-111{+-}9, Hg-0.056{+-}0.011, Rb-12.7{+-}0.9, Sb-0.045{+-}0.007, Sc-0.029{+-}0.005, Se-0.70{+-}0.04, and Zn-1000{+-}110, respectively. It was observed that in benign hypertrophic tissues the contents of Co, Cr, Hg, Sb, and Se were higher than in normal tissues, with statistically significant differences. The contents of Co, Rb, Sc, and Zn were significantly lower and those of Ag, Cr, Fe, Hg, and Sb were significantly higher in cancerous tissues than in normal tissues. - Highlights: Black-Right-Pointing-Pointer INAA is an adequate tool for the determination of trace element contents in the samples of human prostate. Black-Right-Pointing-Pointer In benign hypertrophic tissues the Co, Cr, Hg, Sb, and Se contents were higher than in normal tissues. Black-Right-Pointing-Pointer In cancerous tissues contents of Co, Rb, Sc, and Zn were significantly lower than in normal tissues. Black-Right-Pointing-Pointer In cancerous tissues the Ag, Cr, Fe, Hg, and Sb contents were higher than in normal tissues. Black-Right-Pointing-Pointer The estimation of Zn content in a needle-biopsy core may be used as a tool to diagnose prostate cancer.

  5. Accident investigation and analysis

    NARCIS (Netherlands)

    Kampen, J. van; Drupsteen, L.

    2013-01-01

    Many organisations and companies take extensive proactive measures to identify, evaluate and reduce occupational risks. However, despite these efforts things still go wrong and unintended events occur. After a major incident or accident, conducting an accident investigation is generally the next ste

  6. Elemental analysis of biological tissues of Dmdmdx/J and C57BL/6J mice strains investigated by neutron activation analysis

    International Nuclear Information System (INIS)

    In order to understand in more details the alterations that Duchenne muscular dystrophy disease may cause in biological tissues (blood, tibia, quadriceps and heart), correlations matrixes of the Dmdmdx/J dystrophic mice as well as C57BL/6J (control group) were generated. These mice were obtained from Jackson Laboratory (Maine, USA) and bred at IPEN (Dmdmdx/J), and at Centro de Estudos do Genoma Humano (C57BL/6J), both research centers at Sao Paulo city. Elements of clinical and nutritional relevance (Br, Ca, Cl, K, Mg, Na and S) were investigated by neutron activation analysis. These measurements were performed using the nuclear reactor IEA-R1 (3.5-4.5 MW, pool type) at IPEN. Comparisons between concentrations and correlations in these biological tissues, of these strains, showed that a Ca and Mg in blood are altered for the dystrophic mice. A significant change in the heart of dystrophic mice was also observed suggesting that a constant monitoring is required. Moreover, these results may help the researchers to evaluate the efficiency of new treatments and to compare the advantages of different treatment approaches before performing tests in patients with muscular dystrophy. (author)

  7. Forensic activation analysis

    International Nuclear Information System (INIS)

    Basic principles of neutron activation analysis are outlined. Examples of its use in police science include analysis for gunshot residues, toxic element determinations and multielement comparisons. Advantages of neutron activation analysis over other techniques are described. (R.L.)

  8. Forensic Activation Analysis

    International Nuclear Information System (INIS)

    The high sensitivity of high-flux (reactor) thermal-neutron activation analysis (NAA) for the detection and quantitative measurement of a large number of elements has led, in recent years, to a considerable degree of application of the method in the area of scientific crime investigation (criminalistics). Thus, in a Forensic Activation Analysis Bibliography recently compiled by the author, some 135 publications in this field are listed - and more are appearing quite rapidly. The nondestructive character of the purely-instrumental form of the method is an added advantage in forensic work, since evidence samples involved in actual criminal cases are not destroyed during analysis, but are preserved intact for possible presentation in court. Quite aside from, or in addition to, use in court, NAA results can be very helpful in the investigative stage of particular criminal cases. The ultra sensitivity of the method often enables one to analyze evidence specimens that are too tiny for meaningful analysis by more conventional elemental analysis methods. Also, this high sensitivity often enables one to characterize, or individualize, evidence specimens as to the possibility of common origin - via the principle of multi-element trace-constituent characterization

  9. Neutron Activation Analysis

    Energy Technology Data Exchange (ETDEWEB)

    Corliss, William R.

    1968-01-01

    In activation analysis, a sample of an unknown material is first irradiated (activated) with nuclear particles. In practice these nuclear particles are almost always neutrons. The success of activation analysis depends upon nuclear reactions which are completely independent of an atom's chemical associations. The value of activation analysis as a research tool was recognized almost immediately upon the discovery of artificial radioactivity. This book discusses activation analysis experiments, applications and technical considerations.

  10. Analysis of active patents to investigate the frequency and patterns of Chinese herbal extract combinations claiming to treat heart disease

    Directory of Open Access Journals (Sweden)

    Jiangxue Cheng

    2016-04-01

    Conclusion: Most of the high-frequency Chinese herbs in the patents investigated belong to the high-frequency herbal families, and herb pairs were commonly selected to coincide with the commonly-used herbal family pairs. Low-frequency Chinese herbs were also used, but generally belonged to the high-frequency herbal families, and were therefore similar to the high-frequency herbs in terms of traditional categories of taste and channel entered. The results reflect the use of traditional principles of formula composition, and suggest that these principles may indeed be an effective guide for further research and development of Chinese herbal extract combinations to prevent and treat heart diseases.

  11. CRIMINAL PROCESS AND OPERATIONAL AND INVESTIGATIVE ACTIVITY

    Directory of Open Access Journals (Sweden)

    Meretukov G. M.

    2016-01-01

    Full Text Available The authors of the article examine the relationship between the criminal process and investigative activity taking into consideration the requirements of the Criminal Procedure Law and the Law on Investigative Activities in the Russian Federation. Such important issues as main tasks and principles of the criminal process and investigative activity are considered in the article. The authors analyze interrelations of some investigative actions and operational search as well as the order of introduction and usage of the results of the investigative activities at the stage of criminal case initializing and in the course of investigative activities. The authors also pay attention to the data which must be submitted in the report or memorandum on the prepared or being committed crime giving grounds for criminal case initializing

  12. Seasonal Investigations into the Level of Toxic Elements in Marine Organisms (Fish and Mollusk along the Coast of Ghana Using Neutron Activation Analysis

    Directory of Open Access Journals (Sweden)

    L.A. Sarsah

    2011-04-01

    Full Text Available Seasonal investigation was conducted into the occurrence and extent of potentially toxic heavy metals along the coast of Ghana using marine organisms as bioindicators of pollution. The marine organisms sampled were analysed using Instrumental Neutron Activation Analysis coupled with conventional counting system. All the four samples (Dentex macrophthalmus, Sardinella maderensis, Engraulis encrasicolus and Cymbium cymbium recorded detectable levels of potentially toxic elements which fluctuates between <0.07mg/kg Cd and 699 mg/kg Al. Cymbium cymbium recorded the highest level of (As, Co, Cu, Zn whiles Engraulis encrasicolus accumulated appreciable amount of V. Al was the most abundant of all the elements. The coast of Ghana was found to be mildly polluted with respect to the elements Al, As, Cd, Co, Cu, Cr, Ni, Hg, V and Zn.

  13. The Ca, Cl, Mg, Na, and P mass fractions in benign and malignant giant cell tumors of bone investigated by neutron activation analysis

    International Nuclear Information System (INIS)

    The Ca, Cl, Mg, Na, and P content and Ca/P, Ca/Mg, Ca/Na, Cl/Ca, and Cl/Na ratios in samples of intact bone, benign and malignant giant cell tumor (GCT) of bone were investigated by neutron activation analysis with high resolution spectrometry of short-lived radionuclides. It was found that in GCT tissue the mass fractions of Cl and Na are higher and the mass fraction of Ca and P are lower than in normal bone tissues. Moreover, it was shown that higher Cl/Na mass fraction ratios as well as lower Ca/Cl, Ca/Mg, and Ca/Na mass fraction ratios are typical of the GCT tissue compared to intact bone. Finally, we propose to use the estimation of such parameters as the Cl mass fraction and the Ca/Cl mass fraction ratio as an additional test for differential diagnosis between benign and malignant GCT. (author)

  14. Investigation of the cyclic techniques in neutron activation analysis on Da Lat research reactor for determination of short-lived radionuclides in biological materials

    International Nuclear Information System (INIS)

    The ability of the sensitivity and precision of Cyclic, Pseudocyclic and Cumulative (Replicate) techniques in neutron activation analysis (NAA) on Dalat research reactor were investigated for the determination of short-lived radionuclides. This research focused on determination of 77mSe (T1/2 = 17.4 seconds) in biological materials as a case in point. The result shows that an improvement of detection limits of approximately 2 times in the 3rd cycle to 4th cycle was obtained by using Cyclic NAA, Pseudocyclic NAA and Cumulative NAA in comparison with conventional NAA. The lower detection limits of approximately 3 times can be obtained by a combination of 3 subsamples in Cumulative NAA and 3 cycles in PCNAA. The precision of the techniques is typically within 2-5% from 2nd to 3rd cycles and afterward. In general, the precision and confidence in representative of the analysis result of Cumulative NAA are better than others. However, the utilization of Cyclic NAA is the most useful as regards analysis time. With reference to analytical sensitivity, Cumulative NAA in combination with CNAA or PCNAA will provide a lowest detection limit, and thereby suiting for determining short-lived radionuclides in biological materials with very low concentration levels. (author)

  15. Investigation of the effect of nanoparticle exposure on the flocculability of activated sludge using particle image velocimetry in combination with the extended DLVO analysis.

    Science.gov (United States)

    Xu, J; Li, X Y

    2016-07-01

    With the application of nanotechnologies, nanoparticles (NPs) may enter the wastewater collection system, threatening the operation and stability of the treatment process. The present study investigated the effect of short-term exposures of activated sludge (AS) to NPs on the sludge flocculation ability. Three types of NPs, ZnO, TiO2 and SiO2, were used at a concentration level of 100mg/L for the 24-h exposure, and the particle image velocimetry (PIV) technology was employed to track the sludge flocculation dynamics during the tests. The results showed that a short-term exposure of the AS to NPs did not cause deterioration of the sludge in treatment performance and flocculation. According to the PIV detections, the flocculability of the AS actually was enhanced to some extent after the short-term NPs exposure. Flocs formed after the NPs exposure became more fractal with an elongated shape and a rougher surface, as a result of the improved cell attachment. The extended DLVO theory in combination with the thermodynamic analysis can be well applied to describe the enhanced AS flocculation after the NPs exposure. It is apparent that the attachment of NPs onto cells and flocs can effectively reduce the interaction energy barriers, leading to their improved flocculation ability.

  16. 13. seminar 'Activation analysis'

    International Nuclear Information System (INIS)

    Collection of the abstracts of contributions to the seminar covering broad ranges of application of activation analysis and improvements of systems and process steps. Most of them have been prepared separately for the energy data bases. (RB)

  17. Investigation on activated semi-coke desulfurization

    Institute of Scientific and Technical Information of China (English)

    SHANGGUAN Ju; LI Zhuan-li; LI Chun-hu

    2005-01-01

    An activated semi-coke with industrial-scale size was prepared by high-pressure hydrothermal chemistry activation, HNO3oxidation and calcination activation in proper order from Inner Mongolia Zhalainuoer semi-coke, which is rich in resource and cheap in sale.SO2 adsorption capacity on this activated semi-coke was assessed in the fixed bed in the temperature range of 60-170℃, space velocity range of 500-1300 h-1, SO2 concentration of 1000-3000 ppmv, and N2 as balance. The surface area, elemental and proximate analysis for both raw semi-coke and activated semi-cokes were measured. The experimental results showed that the activated semi-coke has a high adsorption capacity for sulfur dioxide than the untreated semi-coke. This may be the result of increase of surface area on activated semi-coke and surface oxygen functional groups with basicity characteristics. Comparison to result of FTIR, it is known that group of-C-O-C- may be active center of SO2 catalytic adsorption on activated semi-coke.

  18. Activation analysis in Greece

    International Nuclear Information System (INIS)

    A review of research and development on NAA as well as examples of applications of this method are presented, taken from work carried out over the last 21 years at the Radioanalytical Laboratory of the Department of Chemistry in the Greek Nuclear Research Center ''Demokritos''. Improved and faster radiochemical NAA methods have been developed for the determination of Au, Ni, Cl, As, Cu, U, Cr, Eu, Hg and Mo in several materials, for the simultaneous determination of Br and I; Mg, Sr and Ni; As and Cu; As, Sb and Hg; Mn, Sr and Ba; Cd and Zn; Se and As; Mo and Cr in biological materials. Instrumental NAA methods have also been developed for the determination of Ag, Cl and Na in lake waters, Al, Ca, Mg and V in wines, 7 trace elements in biological materials, 17 trace elements in sediments and 20 minor and trace elements in ceramics. A comprehensive computer program for routine activation analysis using Ge(Li) detectors have been worked out. A rather extended charged-particle activation analysis program is carried out for the last 10 years, including particle induced X-ray emission (PIXE) analysis, particle induced prompt gamma-ray emission analysis (PIGE), other nuclear reactions and proton activation analysis. A special neutron activation method, the delayed fission neutron counting method is used for the analysis of fissionable elements, as U, Th, Pu, in samples of the whole nuclear fuel cycle including geological, enriched and nuclear safeguards samples

  19. Investigation of the deep crustal structure and magmatic activity at the NW Hellenic Volcanic Arc with 3-D aeromagnetic inversion and seimotectonic analysis.

    Science.gov (United States)

    Efstathiou, Angeliki; Tzanis, Andreas; Chailas, Stylianos; Stamatakis, Michael

    2013-04-01

    We report the results of a joint analysis of geophysical (aeromagnetic) and seismotectonic data, applied to the investigation of the deep structure, magmatic activity and geothermal potential of the north-western stretches of the Hellenic Volcanic Arc (HVA). The HVA is usually considered to be a single arcuate entity stretching from Sousaki (near Corinth) at the NW, to Nisyros Island at the SE. However, different types of and their ages indicate the presence of two different volcanic groups. Our study focuses on the northern part of the west (older) volcanic group and includes the Crommyonian (Sousaki) volcanic field at the west end of Megaris peninsula (east margin on the contemporary Corinth Rift), the Aegina and Methana volcanic complex at the Saronic Gulf, where typical Quaternary calc-alkaline volcanics predominate, and the Argolid peninsula to the south and south-west. In addition to the rocks associated with Quaternary volcanism, the study area includes a series of Mesozoic ultramafic (ophiolitic) outcrops at the Megaris peninsula, to the north and north-east of the Crommyonian volcanic field, as well as throughout the Argolid. A major deep structural and tectonic feature of the study area, and one with profound influence on crustal deformation and the evolution of rapidly deforming extensional structures like the Corinth Rift and the Saronic Gulf, is the local geometry and dynamics of the African oceanic crust subducting beneath the Aegean plate. Locally, the subducting slab has a NNW strike and ENE plunge, with the dip angle changing rapidly (steepening) approx. beneath the Argolid. The aeromagnetic data was extracted from the recently (re)compiled aeromagnetic map of Greece (Chailas et al, 2010) and was inverted with the UBC-GIF magnetic inversion suite (Li and Oldenburg, 1996). The inversion included rigorous geological constraints introduced by means of numerous in-situ magnetic susceptibility measurements. The inversion has imaged several isolated

  20. Geometric investigation of a gaming active device

    Science.gov (United States)

    Menna, Fabio; Remondino, Fabio; Battisti, Roberto; Nocerino, Erica

    2011-07-01

    3D imaging systems are widely available and used for surveying, modeling and entertainment applications, but clear statements regarding their characteristics, performances and limitations are still missing. The VDI/VDE and the ASTME57 committees are trying to set some standards but the commercial market is not reacting properly. Since many new users are approaching these 3D recording methodologies, clear statements and information clarifying if a package or system satisfies certain requirements before investing are fundamental for those users who are not really familiar with these technologies. Recently small and portable consumer-grade active sensors came on the market, like TOF rangeimaging cameras or low-cost triangulation-based range sensor. A quite interesting active system was produced by PrimeSense and launched on the market thanks to the Microsoft Xbox project with the name of Kinect. The article reports the geometric investigation of the Kinect active sensors, considering its measurement performances, the accuracy of the retrieved range data and the possibility to use it for 3D modeling application.

  1. Study on activation analysis

    International Nuclear Information System (INIS)

    High purity aluminum has been analyzed by neutron activation analysis. The determination of copper contents is aluminum has been used to evaluate its purity level. A new sensitive method has been developed by using graphite thermal column to reduce or eliminate the interference of 24Na which is generated from 27Al (n,α) 24Na reaction by fast neutron. Influence for activity of 24Na due to above reaction is found to be between 2.3 - 2.8 %. Copper contents in the high purity aluminum come out 0.542±0.084 ppm. In addition, contents of 23 other impurity elements (<0.1 - 0.01 ppm) are measured using general method after detection limit and optimum conditions are established. (author)

  2. Investigating Ceiling Effects in Longitudinal Data Analysis

    Science.gov (United States)

    Wang, Lijuan; Zhang, Zhiyong; McArdle, John J.; Salthouse, Timothy A.

    2008-01-01

    Score limitation at the top of a scale is commonly termed "ceiling effect." Ceiling effects can lead to serious artifactual parameter estimates in most data analysis. This study examines the consequences of ceiling effects in longitudinal data analysis and investigates several methods of dealing with ceiling effects through Monte Carlo simulations…

  3. An analysis of science instruction in the fifth-grade science classroom: Investigating activity-based instruction with student-generated discussion

    Science.gov (United States)

    Vowell, Julie E.

    interview. Observations were made in two fifth-grade classrooms and Flanders' Categories for Interaction Analysis was used as a framework for observing the level of social interaction. The observations were transcribed and developed into a "thick" record as suggested by Dr. Phil Carspecken's stages of qualitative research. Member checking and peer debriefing techniques were employed to increase the trustworthiness of the study. The quantitative data suggested science achievement of fifth-grade science students who learned through activity-based instruction with debriefing was statistically significantly higher than the science achievement of fifth-grade science students who learned through activity-based instruction without debriefing (phigher than fifth-grade science students who learned through activity-based instruction without debriefing (peducationally meaningful. Activity-based instruction enhanced with debriefing resulted in a deeper construction of knowledge and retention of understanding.

  4. Investigating travel thresholds for sports and recreation activities

    OpenAIRE

    Jamie E L Spinney; Hugh Millward

    2013-01-01

    Central to the practice of urban planning is the provision of services, which has potential public health and social welfare implications. However, service area analysis, typically, employs arbitrary travel-distance thresholds. Through this study we provide an empirical investigation into the durations and distances that respondents are willing to travel in order to engage in various sports and recreation activities. This research uses time-diary data, augmented with global positioning system...

  5. Instrumentation in neutron activation analysis

    International Nuclear Information System (INIS)

    The rise of neutron activation analysis (NAA) as a tool in geochemical research has parallelled advances in detector, multi-channel analyzer, and computer technology. Micro-computers are now being integrated into NAA systems, and gamma-ray spectrometer instrumentation is evolving towards direct-reading systems. The investigator is faced with a wide range of possibilities and choices when equipping or re-equipping a laboratory. The geoscientist is provided with an overview of the available instrumentation and what soon may be feasible. (L.L.)

  6. Forensic investigation of brick stones using instrumental neutron activation analysis (INAA), laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) and X-ray fluorescence analysis (XRF)

    International Nuclear Information System (INIS)

    Brick stones collected from different production facilities were studied for their elemental compositions under forensic aspects using laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS), instrumental neutron activation analysis (INAA) and X-ray fluorescence analysis (XRF). The aim of these examinations was to assess the potential of these methods in forensic comparison analyses of brick stones. The accuracy of the analysis methods was evaluated using NIST standard reference materials (679, 98b and 97b). In order to compare the stones to each other, multivariate data analysis was used. The evaluation of the INAA results (based on the concentrations of V, Na, K, Sm, U, Sc, Fe, Co, Rb and Cs) using principal component analysis (PCA) and cluster analysis is presented as an example. The results derived from the different analytical methods are consistent. It was shown that elemental analysis using the described methods is a valuable tool for forensic examinations of brick stones.

  7. Activation analysis in forensic studies

    International Nuclear Information System (INIS)

    Application of neutron activation analysis in forensics are grouped into 3 categories: firearms-discharge applications, elemental analysis of other nonbiological evidence materials (paint, other), and elemental analysis of biological evidence materials (multielemental analysis of hair, analysis of hair for As and Hg). 18 refs

  8. Investigations on Accurate Analysis of Microstrip Reflectarrays

    DEFF Research Database (Denmark)

    Zhou, Min; Sørensen, S. B.; Kim, Oleksiy S.;

    2011-01-01

    An investigation on accurate analysis of microstrip reflectarrays is presented. Sources of error in reflectarray analysis are examined and solutions to these issues are proposed. The focus is on two sources of error, namely the determination of the equivalent currents to calculate the radiation...... pattern, and the inaccurate mutual coupling between array elements due to the lack of periodicity. To serve as reference, two offset reflectarray antennas have been designed, manufactured and measured at the DTUESA Spherical Near-Field Antenna Test Facility. Comparisons of simulated and measured data are...

  9. One Pot Selective Arylation of 2-Bromo-5-Chloro Thiophene; Molecular Structure Investigation via Density Functional Theory (DFT), X-ray Analysis, and Their Biological Activities

    Science.gov (United States)

    Rasool, Nasir; Kanwal, Aqsa; Rasheed, Tehmina; Ain, Quratulain; Mahmood, Tariq; Ayub, Khurshid; Zubair, Muhammad; Khan, Khalid Mohammed; Arshad, Muhammad Nadeem; M. Asiri, Abdullah; Zia-Ul-Haq, Muhammad; Jaafar, Hawa Z. E.

    2016-01-01

    Synthesis of 2,5-bisarylthiophenes was accomplished by sequential Suzuki cross coupling reaction of 2-bromo-5-chloro thiophenes. Density functional theory (DFT) studies were carried out at the B3LYP/6-31G(d, p) level of theory to compare the geometric parameters of 2,5-bisarylthiophenes with those from X-ray diffraction results. The synthesized compounds are screened for in vitro bacteria scavenging abilities. At the concentration of 50 and 100 μg/mL, compounds 2b, 2c, 2d, 3c, and 3f with IC50-values of 51.4, 52.10, 58.0, 56.2, and 56.5 μg/mL respectively, were found most potent against E. coli. Among all the synthesized compounds 2a, 2d, 3c, and 3e with the least values of IC50 77, 76.26, 79.13 μg/mL respectively showed significant antioxidant activities. Almost all of the compounds showed good antibacterial activity against Escherichia coli, whereas 2-chloro-5-(4-methoxyphenyl) thiophene (2b) was found most active among all synthesized compound with an IC50 value of 51.4 μg/mL. All of the synthesized compounds were screened for nitric oxide scavenging activity as well. Frontier molecular orbitals (FMOs) and molecular electrostatic potentials of the target compounds were also studied theoretically to account for their relative reactivity PMID:27367666

  10. One Pot Selective Arylation of 2-Bromo-5-Chloro Thiophene; Molecular Structure Investigation via Density Functional Theory (DFT, X-ray Analysis, and Their Biological Activities

    Directory of Open Access Journals (Sweden)

    Nasir Rasool

    2016-06-01

    Full Text Available Synthesis of 2,5-bisarylthiophenes was accomplished by sequential Suzuki cross coupling reaction of 2-bromo-5-chloro thiophenes. Density functional theory (DFT studies were carried out at the B3LYP/6-31G(d, p level of theory to compare the geometric parameters of 2,5-bisarylthiophenes with those from X-ray diffraction results. The synthesized compounds are screened for in vitro bacteria scavenging abilities. At the concentration of 50 and 100 μg/mL, compounds 2b, 2c, 2d, 3c, and 3f with IC50-values of 51.4, 52.10, 58.0, 56.2, and 56.5 μg/mL respectively, were found most potent against E. coli. Among all the synthesized compounds 2a, 2d, 3c, and 3e with the least values of IC50 77, 76.26, 79.13 μg/mL respectively showed significant antioxidant activities. Almost all of the compounds showed good antibacterial activity against Escherichia coli, whereas 2-chloro-5-(4-methoxyphenyl thiophene (2b was found most active among all synthesized compound with an IC50 value of 51.4 μg/mL. All of the synthesized compounds were screened for nitric oxide scavenging activity as well. Frontier molecular orbitals (FMOs and molecular electrostatic potentials of the target compounds were also studied theoretically to account for their relative reactivity

  11. Investigation of the antibacterial activity of pioglitazone

    Directory of Open Access Journals (Sweden)

    Alzoubi KH

    2011-09-01

    Full Text Available Majed M Masadeh1, Nizar M Mhaidat2, Sayer I Al-Azzam2, Karem H Alzoubi21Department of Pharmaceutical Technology; 2Department of Clinical Pharmacy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid, JordanPurpose: To evaluate the antibacterial potential of pioglitazone, a member of the thiazolidinediones class of drugs, against Gram-positive (Streptococcus pneumoniae and Gram-negative (Escherichia coli and Klebsiella pneumoniae bacteria.Methods: Susceptibility testing was done using the antibiotic disk diffusion method and the minimal inhibitory concentration (MIC of pioglitazone was measured according to the broth micro incubation standard method.Results: Pioglitazone induced a dose-dependent antibacterial activity in which the optimal concentration was 80 µM. Furthermore, results indicated that while E. coli was sensitive (MIC = 31.25 ± 3.87 mg/L to pioglitazone-induced cytotoxicity, S. pneumoniae and K. pneumoniae were resistant (MIC = 62.5 ± 3.77 mg/L and MIC = 62.5 ± 4.14 mg/L, respectively. Moreover, pretreatment of bacteria with a suboptimal concentration of pioglitazone (40 µM before adding amoxicillin, cephalexin, co-trimoxazole, or ciprofloxacin enhanced the antibacterial activity of all agents except co-trimoxazole. This enhancing effect was particularly seen against K. pneumoniae.Conclusion: These results indicate the possibility of a new and potentially important pioglitazone effect and the authors’ ongoing studies aim to illustrate the mechanism(s by which this antibacterial effect is induced.Keywords: pioglitazone, susceptibility testing, antibiotics, diabetes 

  12. Fission investigations and evaluation activities at IRMM

    International Nuclear Information System (INIS)

    The IRMM has a longstanding tradition in the field of neutron induced fission physics studies. It is especially well equipped with world-class facilities as the high resolution neutron time-of-flight spectrometer GELINA and the 7 MV Van de Graaff accelerator for the quasi-monoenergetic neutron production. During the past decade several neutron induced fission reactions have been studied in the energy range from eV up to 6 MeV and spontaneous fission. The isotopes under investigation were 235,238 U(n,f), 239 Pu(n,f), 237 Np(n,f), 252 Cf(SF) and 233 Pa(n,f). For all isotopes but 233 Pa, the fission fragment mass-yield and total kinetic energy distributions were measured. 233 Pa was only investigated for the fission cross-section. The results have been described within the multi-modal fission model. The three most dominant fission modes, the two asymmetric standard I (S1) and standard II (S2) as well as the the symmetric superlong mode were used for all the isotopes but 252 Cf. For this isotope at least one other fission mode had to be taken into account, the so--called standard III (S3) mode. Since the theoretical interpretation of experimental results was rather successful also an attempt was made to improve the evaluation of the respective fission cross-section as well as their neutron multiplicities and spectra. Here, the statistical model for fission cross-section evaluation was extended by including the multi-modality concept for fission. Based on the underlying model, separate outer fission barriers have been considered for each mode, while the inner barriers and isomeric wells are assumed to be the same. The self-consistent calculations of the fission cross-section as well as total, capture, elastic and inelastic cross-sections were in good agreement with the experimental data and evaluated nuclear data libraries. As a side product, also fission fragment mass yield distributions have been deduced at incident neutron energies hitherto unaccessible. Very

  13. Analysis of Precision of Activation Analysis Method

    DEFF Research Database (Denmark)

    Heydorn, Kaj; Nørgaard, K.

    1973-01-01

    The precision of an activation-analysis method prescribes the estimation of the precision of a single analytical result. The adequacy of these estimates to account for the observed variation between duplicate results from the analysis of different samples and materials, is tested by the statistic T...

  14. Preliminary investigations on the antibacterial activity of zinc oxide nanostructures

    Energy Technology Data Exchange (ETDEWEB)

    Ramani, Meghana; Ponnusamy, S., E-mail: suruponnus@gmail.com; Muthamizhchelvan, C. [Center for Materials Science and Nano Devices, SRM University, Department of Physics (India)

    2013-04-15

    In this study, we present a systematic investigation on the evolution of nanorods of diameter 35-40 nm and 1-2 {mu}m length from nanoparticles of diameter 30-35 nm by varying the concentration of 2,6-lutidine which acts as a shape-directing agent in the synthesis process. This variation in morphology was studied using transmission electron microscopy. The surface capping agent was subsequently removed by heating during the synthesis process and confirmed using Fourier Transform Infra-red spectroscopy. Sufficient quantity of surface defects in the form of oxygen vacancies was observed from the photoluminescence analysis of the synthesized nanostructures. The concentration of defects decreased as the shape transits from nanoparticles to nanorods. The synthesized samples were preliminarily studied for their antibacterial activity against four model (gram-positive and gram-negative) pathogens by disk diffusion method and growth curve analysis. The calculated generation time indicates higher activity for nanoparticles than nanorods. However, the difference in the activity against different pathogens and their dependence on the concentration of defects indicate oxidative stress in addition to mechanical membrane damage as the major toxicity mechanism. Overall, the experimental findings are preliminary evidence supporting the possibility of developing zinc oxide nanostructures as antibacterial agents against a wide range of microorganisms to control and prevent the spreading of bacterial infections.

  15. Standardizing Activation Analysis: New Software for Photon Activation Analysis

    International Nuclear Information System (INIS)

    Photon Activation Analysis (PAA) of environmental, archaeological and industrial samples requires extensive data analysis that is susceptible to error. For the purpose of saving time, manpower and minimizing error, a computer program was designed, built and implemented using SQL, Access 2007 and asp.net technology to automate this process. Based on the peak information of the spectrum and assisted by its PAA library, the program automatically identifies elements in the samples and calculates their concentrations and respective uncertainties. The software also could be operated in browser/server mode, which gives the possibility to use it anywhere the internet is accessible. By switching the nuclide library and the related formula behind, the new software can be easily expanded to neutron activation analysis (NAA), charged particle activation analysis (CPAA) or proton-induced X-ray emission (PIXE). Implementation of this would standardize the analysis of nuclear activation data. Results from this software were compared to standard PAA analysis with excellent agreement. With minimum input from the user, the software has proven to be fast, user-friendly and reliable.

  16. ICT as the Facilitator of Entrepreneurial Activity: An Empirical Investigation

    Directory of Open Access Journals (Sweden)

    Patricia Kotnik

    2015-02-01

    Full Text Available Internet and the related information and communications technologies (the ICTs are profoundly shaping economic transactions of all kinds. They are also expected to open up entrepreneurial opportunities and reduce the competitive advantage of large firms, thus making room for small and young firms. The EU policy makers have already started to introduce policy initiatives for better use of ICT into the actions to support entrepreneurship, such as promoting digital entrepreneurship. At the moment, however, we have scarce empirical evidence about the impact of ICT on entrepreneurial activity. Our study provides such evidence, by investigating the relationship between ICT use and startup rates, using longitudinal industry level data for Slovenia. The results of the regression analysis show that entry rates are higher in industries that are characterized by higher ICT use, thus providing support to the government policy efforts.

  17. Vibrational spectroscopy [FTIR and FTRaman] investigation, computed vibrational frequency analysis and IR intensity and Raman activity peak resemblance analysis on 4-chloro 2-methylaniline using HF and DFT [LSDA, B3LYP and B3PW91] calculations

    Science.gov (United States)

    Ramalingam, S.; Periandy, S.

    2011-03-01

    In the present study, the FT-IR and FT-Raman spectra of 4-chloro-2-methylaniline (4CH2MA) have been recorded in the range of 4000-100 cm -1. The fundamental modes of vibrational frequencies of 4CH2MA are assigned. All the geometrical parameters have been calculated by HF and DFT (LSDA, B3LYP and B3PW91) methods with 6-31G (d, p) and 6-311G (d, p) basis sets. Optimized geometries of the molecule have been interpreted and compared with the reported experimental values for aniline and some substituted aniline. The harmonic and anharmonic vibrational wavenumbers, IR intensities and Raman activities are calculated at the same theory levels used in geometry optimization. The calculated frequencies are scaled and compared with experimental values. The scaled vibrational frequencies at LSDA/B3LYP/6-311G (d, p) seem to coincide with the experimentally observed values with acceptable deviations. The impact of substitutions on the benzene structure is investigated. The molecular interactions between the substitutions (Cl, CH 3 and NH 2) are also analyzed.

  18. Charged-particle activation analysis

    International Nuclear Information System (INIS)

    The paper discusses the methodology and application of nuclear activation with ion beams (19 via 16O(3He,p)18F, 12C(3He,α)11C and 14N(p,α)11C respectively. Recently, triton activation has been shown to be inherently still superior to 3He activation for the determination of oxygen [16O(3H,n)18F]. Lithium, boron, carbon and sulphur can be detected rapidly, nondestructively and with high sensitivity (approximately 0.25ppm for Li and B) via ''quasi-prompt'' activation based on the detection of short-lived, high-energy beta emitters (10ms1H(7Li,n)7Be for example. Nondestructive multielement analysis: Proton activation has the inherent potential for meeting requirements of broad elemental coverage, sensitivity (ppm and sub-ppm range) and selectivity. Up to 30 elements have been determined in Al, Co, Ag, Nb, Rh, Ta and biological samples, using 12-MeV proton activation followed by gamma-ray spectrometry. These capabilities are further enhanced with the counting of X-ray emitters, 28 elements (269) and accuracy using proton activation. 204Pb/206Pb ratios can also be determined with a relative precision of a few per cent. Although charged-particle activation analysis is a well-established trace analysis technique, broad potential capabilities remain to be explored, e.g. those arising from ultrashort-lived nuclides, heavy ion interactions and the combination of delayed and prompt methods. (author)

  19. Automated activation-analysis system

    International Nuclear Information System (INIS)

    An automated delayed neutron counting and instrumental neutron activation analysis system has been developed at Los Alamos National Laboratory's Omega West Reactor (OWR) to analyze samples for uranium and 31 additional elements with a maximum throughput of 400 samples per day. The system and its mode of operation for a large reconnaissance survey are described

  20. How do oil prices affect oilrig activity? : an empirical investigation

    OpenAIRE

    2004-01-01

    Resume "How do oil prices affect oilrig activity? An empirical investigation" by Guro Børnes Ringlund. Supervisors: Knut Einar Rosendahl and Terje Skjerpen. In this thesis, I analyse the relationship between oilrig activity and oil price changes for several oil-producing regions in the world. Rig activity is a preparation for future production of oil, through exploration for new fields or development of existing fields, and is thus an indicator for the future level of oil production. ...

  1. Structural investigation of mechanically activated ZnO powder

    Energy Technology Data Exchange (ETDEWEB)

    Peleš, A., E-mail: adriana.peles@itn.sanu.ac.rs [Institute of Technical Sciences of SASA, Knez Mihailova 35/IV 11000 Belgrade (Serbia); Pavlović, V.P. [Faculty of Mechanical Engineering, University of Belgrade, 11000 Belgrade (Serbia); Filipović, S.; Obradović, N.; Mančić, L. [Institute of Technical Sciences of SASA, Knez Mihailova 35/IV 11000 Belgrade (Serbia); Krstić, J. [Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Njegoševa 12, 11000 Belgrade (Serbia); Mitrić, M. [Institute of Nuclear Sciences Vinca, Laboratory of Solid State Physics, 11001 Belgrade (Serbia); Vlahović, B.; Rašić, G. [North Carolina Central University, Durham, NC 27707 (United States); Kosanović, D.; Pavlović, V.B. [Institute of Technical Sciences of SASA, Knez Mihailova 35/IV 11000 Belgrade (Serbia)

    2015-11-05

    Commercially available ZnO powder was mechanically activated in a planetary ball mill. In order to investigate the specific surface area, pore volume and microstructure of non-activated and mechanically activated ZnO powders the authors performed N{sub 2} physisorption, SEM and TEM. Crystallite size and lattice microstrain were analyzed by X-ray diffraction method. XRD patterns indicate that peak intensities are getting lower and expend with activation time. The reduction in crystallite size and increasing of lattice microstrain with prolonged milling time were determined applying the Rietveld's method. The difference between non-activated and the activated powder has been also observed by X-ray photoelectron spectroscopy (XPS). XPS is used for investigating the chemical bonding of ZnO powder by analyzing the energy of photoelectrons. The lattice vibration spectra were obtained using Raman spectroscopy. In Raman spectra some changes along with atypical resonant scattering were noticed, which were caused by mechanical activation. - Highlights: • Structural characteristics of mechanically activated ZnO powder were investigated. • The peak intensities are getting lower and expend with activation time. • In Raman spectra some changes along with atypical resonant scattering were noticed.

  2. Investigation of distribution of elements in a Korean ginseng by using a neutron activation method

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Yu Na; Sun, Gwang Min; Chung, Yong Sam; Kim, Young Jin [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

    2009-10-15

    The Distinction of production areas of Korean ginsengs has been tried by using neutron activation techniques such as an instrumental neutron activation analysis (INAA) and a prompt gamma activation analysis (PGAA). This study was done as a part of those efforts. As is well known, the distribution of elements varies according to the part of plant due to the difference of enrichment effect and influence from a soil where the plants have been grown. So a correlation study between plants and soil is an important issue. In this study, the distribution of trace elements within a Korean ginseng was investigated by using an instrumental neutron activation analysis.

  3. Discriminant and Proximity Analysis in Intercultural Investigation.

    Science.gov (United States)

    Laveault, Dany

    1982-01-01

    Discriminant analysis is applied to data from previous research dealing with assessing the particularities of cognitive development in young (four to nine years old) Montagnais Indians and French Canadians. The most important future contribution of discriminant analysis to intercultural research will be its ability to conceptualize group…

  4. Investigation of the oxygen reduction activity on Silver – a rotating disk electrode study

    OpenAIRE

    Wiberg, Gustav K. H.; Mayrhofer, Karl J.J.; Arenz, Matthias

    2010-01-01

    Abstract In this study the oxygen reduction reaction (ORR) is investigated on a nanoparticulate Silver electrocatalyst in alkaline solution. The catalytic activity of the catalyst is determined both in terms of mass activity as well as specific activity and turn over frequency, respectively. It is demonstrated that the established mass activities are independent of the applied catalyst loading, an essential requirement for a reasonable analysis. The determination of the electrochem...

  5. Phytochemical investigation and antimicrobial activity of Derris scandens

    Directory of Open Access Journals (Sweden)

    Hidayat Hussain

    2015-10-01

    Full Text Available Different fractions of root and stem of Derris scandens demonstrated good antibacterial (Escherichia coli, and Bacillus megaterium, antialgal (Chlorella fusca, and antifungal (Microbotryum violaceum activities. Phytochemical investigation resulted in isolation of scandenin, scandenin A, betulinic acid, lupeol, β-amyran-3-one, β-amyrin, β-sitosterol and ß-sitosterol glucopyranoside. Study showed that scandenin has strong antibacterial activity against B. megaterium and good antifungal and antialgal properties. Scandenin A showed good antibacterial, antifungal and antialgal properties.

  6. Tools to investigate how interprofessional education activities link to competencies

    Directory of Open Access Journals (Sweden)

    Courtney West

    2015-07-01

    Full Text Available Integrating interprofessional education (IPE activities and curricular components in health professions education has been emphasized recently by the inclusion of accreditation standards across disciplines. The Interprofessional Education Collaborative (IPEC established IPE competencies in 2009, but evaluating how activities link to competencies has not been investigated in depth. The purpose of this project is to investigate how well two IPE activities align with IPEC competencies. To evaluate how our IPE activities met IPEC competencies, we developed a checklist and an observation instrument. A brief description of each is included as well as the outcomes. We analyzed Disaster Day, a simulation exercise that includes participants from Nursing, Medicine, and Pharmacy, and Interprofessional Healthcare Ethics (IPHCE, a course that introduced medical, nursing, and pharmacy students to ethical issues using didactic sessions and case discussions. While both activities appeared to facilitate the development of IPE competencies, Disaster Day aligned more with IPEC competencies than the IPHCE course and appears to be a more comprehensive way of addressing IPEC competencies. However, offering one IPE activity or curricular element is not sufficient. Having several IPE options available, utilizing the tools we developed to map the IPE curriculum and evaluating competency coverage is recommended.

  7. Tools to investigate how interprofessional education activities link to competencies.

    Science.gov (United States)

    West, Courtney; Veronin, Michael; Landry, Karen; Kurz, Terri; Watzak, Bree; Quiram, Barbara; Graham, Lori

    2015-01-01

    Integrating interprofessional education (IPE) activities and curricular components in health professions education has been emphasized recently by the inclusion of accreditation standards across disciplines. The Interprofessional Education Collaborative (IPEC) established IPE competencies in 2009, but evaluating how activities link to competencies has not been investigated in depth. The purpose of this project is to investigate how well two IPE activities align with IPEC competencies. To evaluate how our IPE activities met IPEC competencies, we developed a checklist and an observation instrument. A brief description of each is included as well as the outcomes. We analyzed Disaster Day, a simulation exercise that includes participants from Nursing, Medicine, and Pharmacy, and Interprofessional Healthcare Ethics (IPHCE), a course that introduced medical, nursing, and pharmacy students to ethical issues using didactic sessions and case discussions. While both activities appeared to facilitate the development of IPE competencies, Disaster Day aligned more with IPEC competencies than the IPHCE course and appears to be a more comprehensive way of addressing IPEC competencies. However, offering one IPE activity or curricular element is not sufficient. Having several IPE options available, utilizing the tools we developed to map the IPE curriculum and evaluating competency coverage is recommended.

  8. Trace Analysis of Ancient Gold Objects Using Radiochemical Neutron Activation

    CERN Document Server

    Olariu, A; Constantinescu, O; Badica, T; Popescu, I V; Besliu, C; Leahu, D; Olariu, Agata; Constantinescu, Mioara; Leahu, Doina

    1999-01-01

    Radiochemical neutron activation analysis has been applied to investigate the microelements in gold samples with archaeological importance. Chemical separation has allowed the determination of traces of Ir, Os, Sb, Zn, Co, Fe, Ni. Instrumental neutron activation analysis has been used for the determination of Cu.

  9. Investigation of in Vitro Anthelmintic activity of Azadirachta Indica Leaves

    Directory of Open Access Journals (Sweden)

    HAQUE RABIU

    2011-12-01

    Full Text Available The aqueous extract of Azadirachta Indica Leaves was investigated for anthelmintic activity using earthworms (Pheretima posthuma, tapeworms (Raillietina spiralis and roundworms (Ascaridiagalli. Various concentrations (10-70 mg/ml of plant extract were tested in the bioassay. Piperazine citrate (10 mg/ml was used as reference standard drug whereas distilled water as control. Determination of paralysis time and death time of the worms were recorded. Extract exhibited significant anthelmintic activity at the concentration of 40 mg/ml. The result shows that aqueous extract possesses vermicidal activity and found to be effective as an anthelmintic. Therefore, the anthelmintic activity of the aqueous extract of Azadirachta Indica Leaves has been reported

  10. INVESTIGATION OF IN VITRO ANTHELMINTIC ACTIVITY OF Clerodendron Inerme

    Directory of Open Access Journals (Sweden)

    Mondal Subhasish

    2010-12-01

    Full Text Available The aqueous extract of Clerodendron inerme leaves was investigated for anthelmintic activity using earthworms(Pheretima posthuma, tapeworms (Raillietina spiralis and roundworms (Ascaridia galli. Various concentrations (10-50 mg/ml of plant extract were tested in the bioassay. Piperazine citrate (10 mg/ml was used as reference standard drug whereas distilled water as control. Determination of paralysis time and death time of the worms were recorded. Extract exhibited significant anthelmintic activity at the concentration of 30 mg/ml. The result shows that aqueous extract possesses vermicidal activity and found to be effective as an anthelmintic. Therefore, the anthelmintic activity of the aqueous extract of Clerodendron inerme has been reported for the first time.

  11. HPTLC Analysis, Antioxidant and Antigout Activity of Indian Plants

    OpenAIRE

    Nile, Shivraj Hariram; Park, Se Won

    2014-01-01

    The HPTLC analysis, antioxidant, and antigout activity of Asparagus racemosus, Withania somnifera, Vitex negundo, Plumbago zeylanica, Butea monosperma and Tephrosia purpurea extracts were investigated. The chemical fingerprinting were carried out by high performance thin layer chromatography (HPTLC), antioxidant activity by ABTS, DPPH, FRAP radical scavenging assays, and antiogout activity by cow milk xanthine oxidase. The HPTLC fingerprint qualitatively revealed predominant amount of flavono...

  12. Investigation of in Vitro Anthelmintic activity of Cinnamomum Camphor Leaves

    OpenAIRE

    HAQUE RABIUL; MONDAL SUBHASISH; GHOSH PARAG

    2011-01-01

    The aqueous extract of Cinnamomum camphorLeaves was investigated for anthelmintic activity using earthworms(Pheretima posthuma), tapeworms (Raillietina spiralis) and roundworms (Ascaridia galli). Various concentrations (10-70 mg/ml) of plant extract were tested in the bioassay. Piperazine citrate (10 mg/ml) was used as reference standard drug whereas distilled water as control.Determination of paralysis time and death time of the worms were recorded. Extract exhibited significant anthelmintic...

  13. Investigation into biologically active constituents of Geum rivale L.

    Science.gov (United States)

    Owczarek, Aleksandra; Gudej, Jan

    2013-01-01

    Aerial and underground parts of Geum rivale (Rosaceae) were investigated. Tiliroside, gallic acid, ellagic acid and a sterol fraction were isolated from aerial parts of the plant. The sterol fraction was analyzed using GC-MS. Eleven phenolic acids were identified in aerial parts of the plant, and eight in underground parts, by means of RP-HPLC analysis. The quantitative determination of phenolic acids, tannins and flavonoids was also carried out.

  14. Experimental investigation of thermal neutron analysis based landmine detection technology

    International Nuclear Information System (INIS)

    Background: Recently, the prompt gamma-rays neutron activation analysis method is wildly used in coal analysis and explosive detection, however there were less application about landmine detection using neutron method especially in the domestic research. Purpose: In order to verify the feasibility of Thermal Neutron Analysis (TNA) method used in landmine detection, and explore the characteristic of this technology. Methods: An experimental system of TNA landmine detection was built based on LaBr3 (Ce) fast scintillator detector and 252Cf isotope neutron source. The system is comprised of the thermal neutron transition system, the shield system, and the detector system. Results: On the basis of the TNA, the wide energy area calibration method especially to the high energy area was investigated, and the least detection time for a typical mine was defined. In this study, the 72-type anti-tank mine, the 500 g TNT sample and several interferential objects are tested in loess, red soil, magnetic soil and sand respectively. Conclusions: The experimental results indicate that TNA is a reliable demining method, and it can be used to confirm the existence of Anti-Tank Mines (ATM) and large Anti-Personnel Mines (APM) in complicated condition. (authors)

  15. Structural Investigation of Alkali Activated Clay Minerals for Application in Water Treatment Systems

    Science.gov (United States)

    Bumanis, G.; Bajare, D.; Dembovska, L.

    2015-11-01

    Alkali activation technology can be applied for a wide range of alumo-silicates to produce innovative materials with various areas of application. Most researches focuse on the application of alumo-silicate materials in building industry as cement binder replacement to produce mortar and concrete [1]. However, alkali activation technology offers high potential also in biotechnologies [2]. In the processes where certain pH level, especially alkaline environment, must be ensured, alkali activated materials can be applied. One of such fields is water treatment systems where high level pH (up to pH 10.5) ensures efficient removal of water pollutants such as manganese [3]. Previous investigations had shown that alkali activation technology can be applied to calcined clay powder and aluminium scrap recycling waste as a foam forming agent to create porous alkali activated materials. This investigation focuses on the structural investigation of calcined kaolin and illite clay alkali activation processes. Chemical and mineralogical composition of both clays were determined and structural investigation of alkali activated materials was made by using XRD, DTA, FTIR analysis; the microstructure of hardened specimens was observed by SEM. Physical properties of the obtained material were determined. Investigation indicates the essential role of chemical composition of the clay used in the alkali activation process, and potential use of the obtained material in water treatment systems.

  16. Drilling to investigate processes in active tectonics and magmatism

    Science.gov (United States)

    Shervais, J.; Evans, J.; Toy, V.; Kirkpatrick, J.; Clarke, A.; Eichelberger, J.

    2014-12-01

    Coordinated drilling efforts are an important method to investigate active tectonics and magmatic processes related to faults and volcanoes. The US National Science Foundation (NSF) recently sponsored a series of workshops to define the nature of future continental drilling efforts. As part of this series, we convened a workshop to explore how continental scientific drilling can be used to better understand active tectonic and magmatic processes. The workshop, held in Park City, Utah, in May 2013, was attended by 41 investigators from seven countries. Participants were asked to define compelling scientific justifications for examining problems that can be addressed by coordinated programs of continental scientific drilling and related site investigations. They were also asked to evaluate a wide range of proposed drilling projects, based on white papers submitted prior to the workshop. Participants working on faults and fault zone processes highlighted two overarching topics with exciting potential for future scientific drilling research: (1) the seismic cycle and (2) the mechanics and architecture of fault zones. Recommended projects target fundamental mechanical processes and controls on faulting, and range from induced earthquakes and earthquake initiation to investigations of detachment fault mechanics and fluid flow in fault zones. Participants working on active volcanism identified five themes: the volcano eruption cycle; eruption sustainability, near-field stresses, and system recovery; eruption hazards; verification of geophysical models; and interactions with other Earth systems. Recommended projects address problems that are transferrable to other volcanic systems, such as improved methods for identifying eruption history and constraining the rheological structure of shallow caldera regions. Participants working on chemical geodynamics identified four major themes: large igneous provinces (LIPs), ocean islands, continental hotspot tracks and rifts, and

  17. Investigating the physiology of brain activation with MRI

    Science.gov (United States)

    Buxton, Richard B.; Uludag, Kamil; Dubowitz, David J.

    2004-04-01

    Functional magnetic resonance imaging (fMRI) has become a powerful tool for investigating the working human brain based on the blood oxygenation level dependent (BOLD) effect on the MR signal. However, despite the widespread use of fMRI techniques for mapping brain activation, the basic physiological mechanisms underlying the observed signal changes are still poorly understood. Arterial spin labeling (ASL) techniques, which measure cerebral blood flow (CBF) and the BOLD effect simultaneously, provide a useful tool for investigating these physiological questions. In this paper, recent results of studies manipulating the baseline CBF both pharmacologically and physiologically will be discussed. These data are consistent with a feed-forward mechanism of neurovascular coupling, and suggest that the CBF change itself may be a more robust reflection of neural activity changes than the BOLD effect. Consistent with these data, a new thermodynamic hypothesis is proposed for the physiological function of CBF regulation: maintenance of the [O2]/[CO2] concentration ratio at the mitochondria in order to preserve the free energy available from oxidative metabolism. A kinetic model based on this hypothesis provides a reasonable quantitative description of the CBF changes associated with neural activity and altered blood gases (CO2 and O2).

  18. Activation Analysis in Forensic Science. Survey Paper

    International Nuclear Information System (INIS)

    Recently the unique features of the activation analysis method have been utilized to advantage to meet some specialized needs in the scientific investigation of crime. A review of the principal forensic activation analysis applications to biological materials to date indicates that they may be roughly classified as: (i) the detection and determination of residues of toxic materials in foodstuffs, human tissues, sera and excreta; (ii) the 'individualization' of hair, fibres, narcotics and drugs; and (iii) investigation of the transference of ballistic material to bone, cloth or paper. Analyses of these materials in some actual forensic investigations have been perfected to the point of acceptance in the law courts of several countries. Additional and broader areas of application are under development in a number of nuclear and forensic laboratories. (i) The determination of sub microgram quantities of phosphorus compounds, arsenic, mercury, selenium and thallium in specimens from post-mortem examinations and from living persons showing symptoms of toxicity has revealed certain ingestion of abnormal amount of toxic substances by comparison with similar specimens from healthy persons. In some cases, with tissues such as hair and nails, the time scale of the ingestion of arsenic or mercury has been revealed through the distribution of the deposited element with distance from the growing end or edge. (ii) A series of feasibility studies on the possibility of distinguishing similar materials through their characteristic trace-element patterns have resulted from observations of the wide range or variation in trace impurity content in specimens which come from different individuals or different natural sources. For example, extensive activation analyses for more than twenty elements in human head hair from many people have been carried out and a statistical analysis of the results indicate that activation hair comparisons in forensic investigations may be quite definitive

  19. Investigation into the surface active groups of coal

    Institute of Scientific and Technical Information of China (English)

    XU Jing-cai; XUE Han-ling; Deng Jun; Wen Hu; ZHANG Xing-hai

    2001-01-01

    The oxidation heat of coal is the direct reason leading to coal spontaneous combustion.When coal is exposed in oxygen atmosphere, the physical adsorption and chemisorption happened, and then which resulting chemical reaction followed heat between coal and oxygen. Owing to the complexity and uncertain of molecular structure of coal, it was only reduced that bridge bonds, side chains and O2-containing functional groups in coal may be prone to oxidation in last year, but not to deeply investigate into the structures and the type of the active radicals. In this paper, according to the last achievements in coal structure research, the hypomethylether bond,hypoalkyl bond of α-carbon atom with hydroxyl and α-carbon atom with hypomethy side chain and hypomettyl bonds linking up two aromatic hydrocarbon in bridge bonds, and methoxy, aldehyde and alkyls of α-carbon atom with hydroxy in side bonds are inferred to be free radical easily to lead to oxidize coal under the ambient temperature and pressure. The order from strong to week of oxide activation of the seven surface active groups is aldehyde side chains, hypomethylether bonds, hypoalkyl bonds of α-carbon atom with hydroxyl, hypoalkyl bonds of α-carbon atom with hypomethyl, hypomethyl bonds linking up two aromatic hydrocarbon, methoxy, alkyls side chains of α-carbon atom with hydroxyl. Because of the two unsaturated molecular tracks of C2, unpaired eleotron clouds of the part of surface active groups of coal enter molecular tracks of O2 to lead to chemisorb on the conjugate effect and induced effect of surface active groups, and then chemical reaction followed heat happens in them. On the basis of change of bond energy, weighted average method is adopted to count the reactionheat value of each mol CO, CO2 and H2O. The property of coal spontaneous combustion is different for the different number and oxidability of the active structure in the coal resulting in the different oxidation heat.

  20. Investigation of in Vitro Anthelmintic activity of Cinnamomum Camphor Leaves

    Directory of Open Access Journals (Sweden)

    HAQUE RABIUL

    2011-03-01

    Full Text Available The aqueous extract of Cinnamomum camphorLeaves was investigated for anthelmintic activity using earthworms(Pheretima posthuma, tapeworms (Raillietina spiralis and roundworms (Ascaridia galli. Various concentrations (10-70 mg/ml of plant extract were tested in the bioassay. Piperazine citrate (10 mg/ml was used as reference standard drug whereas distilled water as control.Determination of paralysis time and death time of the worms were recorded. Extract exhibited significant anthelmintic activity at the concentration of 50 mg/ml. The result shows that aqueous extract possesses vermicidal activity and found to be effective as an anthelmintic. Therefore, the anthelmintic activity of the aqueous extract of Cinnamomum camphorLeaves has been reported. Introduction Infections with helminth are among the most widespread infections in humans and other domestic animals affecting a large number of world population. The majority of these infections due to worms are generally restricted mainly to the tropical regions and the occurance is accelerated due to unhygienic lifestyle and poverty also resulting in the development of symtomps like anaemia, eosinophilia and pneumonia1. Parasitic diseases cause ruthless morbidity affecting principally in population.

  1. Flow Cytometric Investigation of Classical and Alternative Platelet Activation Markers

    Science.gov (United States)

    Debreceni, Ildikó Beke; Kappelmayer, János

    2013-01-01

    Platelets show a substantial role in the maintenance of vascular integrity when these cells after a rapid activation adhere to the vessel wall lesion, aggregate with other platelets and leukocytes resulting in an arterial thrombosis. Analysis of in vivo platelet activation at an early time point is crucial in the detection of developing thrombotic events. In addition, the forecast of future complications as well as the evaluation of the efficacy of anti- platelet medication are also essential in a large group of patients. Changes in the levels of platelet receptors or alteration in other surface properties due to intra- and extracellular responses to a stimulus can be measurable primarily by flow cytometry with specific antibodies via the assessment of classical and alternative platelet activation markers. Some of these biomarkers have been already used in routine laboratory settings in many cases, while others still stand in the phase of research applications. Deficiency in platelet receptors is also accessible with this technique for the diagnosis of certain bleeding disorders. We here describe the most important types of platelet activation markers, and give an overview how the levels of these markers are altered in different diseases.

  2. Investigating echo state networks dynamics by means of recurrence analysis

    CERN Document Server

    Bianchi, Filippo Maria; Alippi, Cesare

    2016-01-01

    In this paper, we elaborate over the well-known interpretability issue in echo state networks. The idea is to investigate the dynamics of reservoir neurons with time-series analysis techniques taken from research on complex systems. Notably, we analyze time-series of neuron activations with Recurrence Plots (RPs) and Recurrence Quantification Analysis (RQA), which permit to visualize and characterize high-dimensional dynamical systems. We show that this approach is useful in a number of ways. First, the two-dimensional representation offered by RPs provides a way for visualizing the high-dimensional dynamics of a reservoir. Our results suggest that, if the network is stable, reservoir and input denote similar line patterns in the respective RPs. Conversely, the more unstable the ESN, the more the RP of the reservoir presents instability patterns. As a second result, we show that the $\\mathrm{L_{max}}$ measure is highly correlated with the well-established maximal local Lyapunov exponent. This suggests that co...

  3. Conference on instrumental activation analysis IAA 92

    International Nuclear Information System (INIS)

    The publication contains 26 abstracts primarily concerned with neutron activation analysis, although other analytical techniques based on X-ray fluorescence analysis, PIXE, PIGE, RBS are also included. Some contributions deal with aspects of quality practice and assurance in radioanalytical laboratories, with marketing of instrumental neutron activation analysis services, with hard- and software aspects of radiation detection, etc. (Z.S.)

  4. Green synthesis, spectroscopic investigation and photocatalytic activity of lead nanoparticles

    Science.gov (United States)

    Elango, Ganesh; Roopan, Selvaraj Mohana

    2015-03-01

    Most of researcher focused their research towards synthesize of nanoparticles by the method of applied chemical method which was one of the costliest method. We have focused cheapest and simplest method for the synthesizing of lead nanoparticles (Pb-NPs) using cocos nucifera L extract. The methanolic extract of cocos nucifera L was efficiently used as a reducing agent for synthesizing Pb-NPs. On treatment of lead acetate with cocos nucifera coir extracts, stable Pb-NPs were formed. The synthesized Pb-NPs were further confirmed by UV-visible spectroscopy, X-ray diffraction (XRD), Transmission electron microscope (TEM) and Energy Dispersive (EDAX) analysis. The secondary metabolites present in methanolic extract which can mainly act as a reducing and capping agents for the formation of Pb-NPs were identified by GC-MS. Anti-microbial activity for Pb-NPs against four pathogenic strain's such as Staphylococcus aureus, Escheria coli, Staphylococcus epidermis and Bacillus subtilis. Result states that Pb-NPs size was 47 nm and also shows good activity against S. aureus. Further we report on photocatalytic absorption of malachite green dye processed in short UV wavelength at 254 nm. UV spectral analysis showed peak absorbance at 613 nm with special reference to the excitation of surfaces plasmon vibration by Pb-NPs.

  5. Investigation and Analysis of Coedna's Participation in Sport Activity outside Class%女大学生参与课外体育活动状况调查与分析

    Institute of Scientific and Technical Information of China (English)

    王海英

    2011-01-01

    Extracurricular sports is an important part of school sports, is an extension and supplement of physical education. The meaning of participating in extracurricular physical exercise can not only remain in the attitude and understanding that only truly engaged in extra-curricular sports activities in order to truly appreciate its value. This paper investigated and analyzed the situation that female college students participate in extracurricular sports activities and propose appropriate measures to effectively improve and enhance the quality of their extra-curricular sports activities and promote good health.%课外体育是学校体育的重要组成部分,是体育课的延伸和补充,参加课外体育锻炼的意义不能仅停留在态度和理解上,只有切实投身于课外体育活动中才能真正体会到其价值所在.本研究就女大学生参与课外体育活动的状况进行调查与分析,并提出相应对策,以期切实改善和提高其课外体育活动的质量,促进身体健康.

  6. Instrumental neutron activation analysis - a routine method

    International Nuclear Information System (INIS)

    This thesis describes the way in which at IRI instrumental neutron activation analysis (INAA) has been developed into an automated system for routine analysis. The basis of this work are 20 publications describing the development of INAA since 1968. (Auth.)

  7. Investigation of Cytotoxic Activity in Four Stachys Species from Iran

    Science.gov (United States)

    Khanavi, Mahnaz; Manayi, Azadeh; Lotfi, Mahnaz; Abbasi, Rofeyde; Majdzadeh, Maryam; Ostad, Seyed Nasser

    2012-01-01

    The aerial parts of Stachys laxa Boiss. and Buhse. from Siah-bishe in Mazandaran province, Stachys trinervis Aitch. and Hemsl. from Karaj in Alborz province, Stachys subaphylla Rech. F. and Stachys turcomanica Trautv. from Golestan province have been collected in May 2008. Total extracts were obtained through MeOH/H2O (80/20) and then partitioned between CHCl3, EtOAc and MeOH. These fractions and total extracts have been investigated for in-vitro cytotoxic activity against the colon carcinoma (HT-29), colorectal adenocarcinoma (Caco-2), breast ductal carcinoma (T47D) and Swiss mouse embryo fibroblast (NIH 3T3) cell lines using MTT assay (3-(4,5-di methyl thiazol-2-yl)-2,5-di phenyltetrazolium bromide). At each cell line, doses of 3.125, 6.25, 12.5, 25, 100, 200, 400 and 800 µg/mL in 1% (v/v) DMSO of all samples were tested. Ethyl acetate and chloroform fractions of Stachys laxa against proliferation of T47D and HT-29 cell lines and chloroform fraction of Stachys subaphylla and Stachys subaphylla ethyl acetate fraction toward T47D cell line exhibited highest cytotoxic activity (IC50 < 50 µg/mL). Ethyl acetate and chloroform fractions of Stachys turcomanica against HT-29 cell line, except methanol fraction of Stachys subaphylla, the other extrcts on T47D cell line, represented moderate cytotoxic activity (IC50 < 70 µg/mL). All fractions of S. trinervis demonstrated no effective cytotoxic activity. IC50 values confirmed that the growth and proliferation of HT-29 and T47D cells were most affected by chloroform and ethyl acetate fractions of Stachys laxa and Stachys turcomanica due to their nonpolar compounds. PMID:24250483

  8. Project-Based Language Learning: An Activity Theory Analysis

    Science.gov (United States)

    Gibbes, Marina; Carson, Lorna

    2014-01-01

    This paper reports on an investigation of project-based language learning (PBLL) in a university language programme. Learner reflections of project work were analysed through Activity Theory, where tool-mediated activity is understood as the central unit of analysis for human interaction. Data were categorised according to the components of human…

  9. Investigation of MEK activity in COS7 cells entering mitosis.

    Science.gov (United States)

    Shi, Huaiping; Zhang, Tianying; Yi, Yongqing; Luo, Jun

    2014-12-01

    Although the mitogen-activated protein kinase (MAPK) pathway has been extensively investigated, numerous events remain unclear. In the present study, we examined mitogen-activated protein kinase kinase (MEK) expression from interphase to mitosis. Following nocodazole treatment, COS7 cells gradually became round as early as 4 h after treatment. Cyclin B1 expression gradually increased from 4 to 24 h in the presence of nocodazole. When cells were treated with nocodazole for 4 h, the level of epidermal growth factor (EGF)-mediated MEK phosphorylation did not significantly change between nocodazole-untreated and -treated (4 h) cells (P>0.05). However, EGF-mediated MEK phosphorylation was significantly inhibited upon treatment with nocodazole for 8 and 24 h compared to nocodazole-untreated cells (P0.05). The results showed that MEK expression is gradually inhibited from cell interphase to mitosis, and that MEK downstream signaling is affected by this inhibition, which probably reflects the requirements of cell physiology during mitosis.

  10. Investigation and analysis of SSI effects in seismic response of NPPs EMO and EBO

    International Nuclear Information System (INIS)

    This progress report outlines and describes the analysis and investigations of soil-structure interaction effects in seismic response of Bohunice and Mochovce nuclear power plants. The work carries out consists of theoretical-numerical analysis of soil-structure interaction and the description of the experimental results obtained so far. Investigations were performed for different soil conditions and recommendations were elaborated as to prepare and use long-term monitoring of vibration activity at the Bohunice NPP site

  11. Investigation and Research and Analysis of Women's Leisure Sports Activities%女性休闲体育活动现状的调查与研究分析

    Institute of Scientific and Technical Information of China (English)

    李磊; 刘红梅

    2012-01-01

    As society advances, the improvement of women's social status, makes women enjoy equal rights with men. Women s leisure sports as part of leisure culture in women has also been an unprecedented welcome. At present, research on women's leisure sports are not many, this paper studies, participated in leisure physical activity on the individual circumstances of women, leisure time, location, activities and attitudes of recreational sports and other aspects of analysis discussed with a view of women the development of leisure and sports provide a theoretical basis.%随着社会的进步,女性社会地位的提高,使得女性享有了与男性同等的权利.女性休闲体育作为体闲文化的一部分,在女性中也受到了前所未有的欢迎.目前,关于女性休闲体育的研究还不多,本文通过调查研究,对参加休闲体育锻炼的女性个人情况、余暇时间、地点、活动方式及对休闲体育的态度等诸方面进行分析探讨,以期对女性休闲体育的发展提供理论依据.

  12. Neutron activation analysis of urinary calculi

    International Nuclear Information System (INIS)

    Urinary calculi resulting from disorders in the urinary system are mostly composed of uric acid, urates, calcium oxalate, alkaline earth phosphates (Ca and Mg), triple phosphate (magnesium ammonium phosphate), calcium carbonate, cystine, xanthine, and traces of proteins. The determination of these macro-constituents has been carried out by different analytical procedures. No attempts however, have been reported regarding the determination of trace elements in urinary stones, apart from that of Herring et al., who investigated the consumption of strontium by urolithiasis patients. The present work is a non-destructive neutron activation analysis of urinary calculi, to search the variation in concentration of certain trace elements with the chemical composition of the calculus

  13. Wavelet Analysis for Investigation of Precise Gnss Solutions' Credibility

    Science.gov (United States)

    Bogusz, Janusz; Klos, Anna

    2010-01-01

    This publication presents the results of searching short-term oscillations of the ASG network sites using wavelet transform. Polish Active Geodetic Network (ASG-EUPOS) is the multifunctional precise satellite positioning system established by the Head Office of Geodesy and Cartography in 2008. The adjusted network consisted of over 130 stations from Poland and neighbouring countries. The period covered observations gathered from June 2008 to July 2010. The method of processing elaborated in the CAG (Centre of Applied Geomatics, Warsaw Military University of Technology), which is one of the 17 EPN LAC (EUREF Permanent Network Local Analysis Centre) acting now in Europe, established at the end of 2009, is similar with the official one used in EPN. It is based on the Bernese 5.0 software, but the difference to the EPN's solutions lies in the resolution of resulting coordinates. In the presented research the 1-hour sampling rate with 3-hour windowing (66% of correlation) is applied. This allows us to make the interpretations concerning short period information in GNSS (Global Navigation Satellite System) coordinates series. Analyses using FFT and least squares (tidal) gave very coherent results and confirmed several millimetres diurnal and sub-diurnal oscillations. Wavelet analysis is aimed at the investigation of credibility of the precise GNSS solutions in terms of changes of the amplitude of oscillations in time. As a result of this study the changes in the amplitude of oscillations at diurnal and sub-diurnal frequency bands were obtained. These could be caused by the artificial modulations of the near-by frequencies, but also some geophysical signals could be clearly distinguished. Additionally the comparison of Continuous Wavelet Transforms of near stations (three pairs from ASG-EUPOS network) was performed. This comparison showed different behaviour of oscillations of residual coordinates, mainly due to the different thermal response or artefacts related to the

  14. Preliminary studies on the observation of oxygen-18 exchange in coal by Fourier Transform Infrared spectroscopy, investigations in the use of FTIR for coal ultimate analysis, and a fast pneumatic transfer system for 0-18 determination by neutron activation analysis

    Energy Technology Data Exchange (ETDEWEB)

    DeKeyser, C.F. Jr.

    1984-01-01

    Use of isotope exchange kinetics for functional group determination in coal is investigated. Net exchange kinetics determined by time dependent Neutron Activation Analysis measurements (NAA) would be related to individual functional group exchange kinetics determined by Fourier Transform Infrared (FTIR) spectroscopy measurements. The work described herein can be grouped into three categories: 1) work relating to the FTIR spectroscopy of coal, 2) work relating to oxygen exchange in coal, and 3) work relating to measurements of O-18 by NAA. Methods are discussed for preparing IR observable samples of coal and ash, obtaining FTIR spectra of these samples, and reducing the spectral data to numerical form. Also included in this category is an investigation into the use of IR spectroscopic methods for the ultimate analysis of coals. An initial attempt at the observation of oxygen exchange in coal is described which includes two exchange schemes and the FTIR spectroscopic observation of their end products. A facile exchange between O-18 water and O-16 in coal was attempted with and without catalysts. Also, the design and construction of a fast pneumatic transfer system for the determination of O-18 is described.

  15. A Climatological Investigation of the Activity of Summer Subtropical Vortices

    Institute of Scientific and Technical Information of China (English)

    LUO Zhexian; DAI Kan

    2008-01-01

    By applying a new vortex detection method to the ECMWF 40-yr reanalysis (ERA40) data from 1985 to 2002, the climatology of summer vortices has been investigated in five subtropical regions, i.e., the northwestern Pacific, northeastern Pacific, northwestern Atlantic, northeastern Atlantic, and Australia-South Pacific, followed by validation with NCEP/NCAR reanalysis data. Results are as follows: (1) The spatial distributions of ERA40 vortex activities (VAC) were well consistent with those of NCEP/NCAR reanalysis (NRA) results in all regions, especially in northwestern Pacific. (2) Because of different model resolutions, both the number and intensity of vortices obtained from NRA were significantly weaker thanERA40's. (3) Vortices mainly cruised in coasts and the adjacent seas, from where to the land or the open sea vortex activities were gradually decreased. (4) There were two active centers in the northwestern Pacific:one was located in South China Sea and the other, as the largest center of the five regions, spread from the east side of the Philippines to Japan. (5) Over the northwestern Atlantic, most vortices occurred in Panama and its west-side offshore. (6) The spatial distributions of vortices were alike between the northeastern Pacific and northeastern Atlantic, both spreading from coasts to the west-side sea at 5°-20°N. (7) In the Anstralia-South Pacific, vortices were not as active as those in the other four regions, and mostly took place in the equator-side of near ocean areas. (8) Except the northwestern Pacific and northwestern Atlantic, the VAC interannual variations in the other three regions were different between ERA40 and NRA data. (9)In the northwestern Pacific and northwestern Atlantic, the VAC interannual variation could be separated to several distinct stages. (10) Since the mid 1980s, mean vortex intensity was getting increased in the northwestern Pacific, which was most significant in the subtropical areas on a global basis. In the western

  16. Analysis of HR activities in selected company

    OpenAIRE

    Jandová, Šárka

    2012-01-01

    The aim of this thesis is based on theoretical knowledge and analysis of the basic HR activities in the selected company to identify the strengths and weaknesses of the policies implemented personnel work. Then propose an effective ways of improving HR activities and employee satisfaction. Basic personal activities analyzed in this thesis are the adaptation, acquisition and selection of employees, performance management and staff appraisal, remuneration and training of staff. Analysis of pers...

  17. Business process analysis of a foodborne outbreak investigation mobile system

    Science.gov (United States)

    Nowicki, T.; Waszkowski, R.; Saniuk, A.

    2016-08-01

    Epidemiological investigation during an outbreak of food-borne disease requires taking a number of activities carried out in the field. This results in a restriction of access to current data about the epidemic and reducing the possibility of transferring information from the field to headquarters. This problem can be solved by using an appropriate system of mobile devices. The purpose of this paper is to present the IT solution based on the central repository for epidemiological investigations and mobile devices designed for use in the field. Based on such a solution business processes can be properly rebuild in a way to achieve better results in the activities of health inspectors.

  18. Investigate the Child's Scientific Activities on Practical Child's Activity Books for the Kindergarten's Children

    Science.gov (United States)

    Aldarabah, Intisar Turki; Al-Mouhtadi, Reham

    2015-01-01

    This research aimed to investigate the extent to which the interactive international curriculum is included in the "Child's Scientific Activities" issued by the Ministry of Education in Jordan, for the kindergarten stage according to the global criterion (NRC). In order to answer the study questions, an instrument was developed to…

  19. Conference on Instrumental Activation Analysis: IAA 89

    Science.gov (United States)

    Vobecky, M.; Obrusnik, I.

    1989-05-01

    The proceedings contain 40 abstracts of papers all of which have been incorporated in INIS. The papers were centred on the applications of radioanalytical methods, especially on neutron activation analysis, x ray fluorescence analysis, PIXE analysis and tracer techniques in biology, medicine and metallurgy, measuring instruments including microcomputers, and data processing methods.

  20. Modelling and Experimental Investigation of an Active Damper

    Directory of Open Access Journals (Sweden)

    Rafael Luís Teixeira

    2006-01-01

    Full Text Available This paper presents a validation methodology of the dynamic behavior of an active viscous damper. The damper has two flexible metallic bellows connected to a rigid reservoir filled with fluid. When one of the bellows is connected to a vibrating structure a periodic flow passes through a variable internal orifice and the damping effect is produced. The size of the orifice is adjusted by a controlled linear piezoelectric actuator that positions the conical core into a conical cavity. The device finite element structural model consists of the valve body and its conical core that are assumed rigid and the flexible bellows are represented by two pistons with elastic suspensions. The flow developed inside the damper is modeled considering the fluid-structure interation, using the Lagrangean-Eulerian formulation. To validate the proposed model a prototype was constructed and experimental tests and numerical simulations are accomplished in the time domain, applying harmonic excitations. The results are compared using curves that relate the damping coefficient with the orifice size and with the input velocity applied at the bellows face. However, for the proper control design and system operation, the direct use of the finite element model becomes unviable due to its high computational time. Then, a reduced second order discrete dynamic model for the damper was developed. The model parameters are identified by analysis in the frequency domain, using impulsive excitation force, for constant and variable orifice sizes. At low excitation frequencies, the damper prototype behaves like a single degree of freedom system which damping factor changes with the orifice size A fuzzy controller was designed and it generates the orifice reference size associated to the desired damping factor. The active system presented better performance when compared to the passive one.

  1. Investigation of activity release during light water reactor core meltdown

    International Nuclear Information System (INIS)

    A test facility was developed for the determination of activity release and of aerosol characteristics under realistic light water reactor core melting conditions. It is composed of a high-frequency induction furnace, a ThO2 crucible system, and a collection apparatus consisting of membrane and particulate filters. Thirty-gram samples of a representative core material mixture (corium) were melted under air, argon, or steam at 0.8 to 2.2 bar. In air at 27000C, for example, the relative release was 0.4 to 0.7% for iron, chromium, and cobalt and 4 to 11% for tin, antimony, and manganese. Higher release values of 20 to 40% at lower temperatures (21500C, air) were found for selenium, cadmium, tellurium, and cesium. The size distribution of the aerosol particles was trimodal with maxima at diameters of 0.17, 0.30, and 0.73 μm. The result of a qualitative x-ray microanalysis was that the main elements of the melt were contained in each aerosol particle. Further investigations will include larger melt masses and the additional influence of concrete on the release and aerosol behavior

  2. Neutron activation analysis of reference materials

    International Nuclear Information System (INIS)

    The importance is pointed out of neutron activation analysis in the preparation of reference materials, and studies are reported conducted recently by UJV. Instrumental neutron activation analysis has been used in testing homogeneity and in determining 28 elements in newly prepared reference standards of coal fly ash designated ENO, EOP and ECH. For accuracy testing, the same method was used in the analysis of NBS SRM-1633a Trace Elements in Coal Fly Ash and IAEA CRM Soil-5 and RM Soil-7. Radiochemical neutron activation analysis was used in determining Cd, Cu, Mn, Mo, and Zn in biological materials NBS SRM-1577 Bovine Liver, Bowen's Kale and in IAEA RM Milk Powder A-11 and Animal Muscle H-4. In all instances very good precision and accuracy of neutron activation analysis results were shown. (author)

  3. The investigation of Adenosine Deaminase activity in patients with Mycosis Fungoides

    Directory of Open Access Journals (Sweden)

    Yılmaz Ulaş

    2013-12-01

    Full Text Available Aim: Mycosis fungoides (MF is a cutaneous T cell lymphoma. The clinical and histophological diagnosis of early mycosis fungoides is usually diffucult. There is no special laboratory method for the diagnosis of MF disease and this is the most important problem in diagnosis and also follow up the effectiveness of treatment. Adenosine deaminase (ADA activity is a non-specific marker of T cell activation. In the present study, we aimed to investigate the levels of plasma and tissue ADA in patients with mycosis fungoides and to determine if ADA is an activation criteria for this disease. Materials and Medhods: The levels of ADA activities in both plasma and tissues were spectrophotometrically measured in 40 patients with MF and compared to those of 33 healthy subjects. Moreover, a subgroup analysis regarding ADA activities was performed in 17 patients who achieved complete remission after different kinds of treatments. Results: Patients with MF had more significantly elevated plasma and tissue ADA activity levels than those of control groups (respectively p0.05; MF patients in remission were found to have higher plasma levels of ADA activities than those of controls (p<0.001. Conclusion: These findings of the current study may provide an important clinical support for showing the roles of plasma and tissue ADA activity levels to predict disease activity in MF patients. In addition, levels of ADA activity measurements might be a marker to follow up in MF patients.

  4. Investigating Convergence Patterns for Numerical Methods Using Data Analysis

    Science.gov (United States)

    Gordon, Sheldon P.

    2013-01-01

    The article investigates the patterns that arise in the convergence of numerical methods, particularly those in the errors involved in successive iterations, using data analysis and curve fitting methods. In particular, the results obtained are used to convey a deeper level of understanding of the concepts of linear, quadratic, and cubic…

  5. 阳曲县居民小区体育活动现状调查与分析%Status Quo Investigation and Analysis of Residents’ Community Sports Activities in Yangqu County

    Institute of Scientific and Technical Information of China (English)

    张宏丽

    2016-01-01

    社区体育作为开展全民健身运动的一种有效的方式,以其灵活的组织,吸引了大量的社区居民,同时方便了居民,增强了健身效果。它不仅能够不断满足社区居民日益增长的娱乐健身交往需求,更能丰富人们的业余文化生活,因此日益受到普通人们的青睐,本课题采用调查法、文献资料法和数理统计法对阳曲县居民小区体育活动现状进行了研究。调查发现阳曲县居民闲暇时间参加体育活动较少,体育设施场地不足,缺少统一的组织与管理,参加锻炼的青少年、老年人占多数,中年人较少。体育锻炼与收入水平,年龄,文化程度密切相关。%Community sports is an effective way to carry out national fitness program and its flexible organization has attracted community residents,brought convenience to them and strengthened fitness effect.As it can not only meet residents’increasing need for entertainment and fitness -keeping,but also enrich their amateur cultural life,so it is increasingly favored by people.The subject studies the status quo of residents’community sports activities in Yangqu county with methods of investigation,literature and mathematical statistics.The investigation finds that residents spend little time in exercise in their spare time;insufficient sports sites and facilities;lack of unified organization and management;the majority of participants are teenagers and aged people,while the number of middle -aged people is quite small.Physical exercise is closely related with income level,age and education level.

  6. Investigation and analysis on 210 Senior citizens’ activity of daily living (ADL) in senior apartment%老年公寓210例老人日常生活能力(ADL)调查分析

    Institute of Scientific and Technical Information of China (English)

    周琦; 秦生发; 马秋平; 梁凯讴; 黄子民

    2013-01-01

    目的:调查住老年公寓的日常生活能力与健康状况。方法:应用日常生活能力量表(ADL)对入住老年公寓210例老人测评。结果:调查对象中,平均每人患1.15种疾病(242/210);80-89岁组与60-69岁组,70-79岁组ADL分值比较,差异具有统计学意义(p<0.05)。结论:入住老年公寓老人具有高龄多病的特点,随着增龄日常生活能力显著下降,日常生活能力量表(ADL)具有良好的区分性。引入日常生活能力量表(ADL)进行评定,不失为老人分级管理的简便可靠的工具。%Objective:Investigation health conditions and activity of daily living of senior citizens living in senior apartment. Method:Appraising 210 senior citizens in senior apartment by using the Activity of Daily Living (ADL) scale. Result:On average, each respondent suffers from 1.15 kinds of disease (242/210), According to the comparison of the ADL values from 3 age groups of 80-89,60-69 and 70-79, the difference is statistically significant (p<0.05).Conclusion: Senior citizens living in senior apartment are characterized by the features of advanced ages and being troubled by diseases. While the age increases, the ability of daily living decreases. ADL scale has a fine distinguish ability. Therefore ADL scale is a convenient and reliable tool to classify senior citizens and furthermore facilitate a better care for the old.

  7. Investigation and Analysis of the Present Situation of Chenzhou Urban Residents’ Fitness Activities%郴州市居民参与健身活动现状调查与分析

    Institute of Scientific and Technical Information of China (English)

    李群英; 赵剑平; 龙寿伯

    2012-01-01

      采用文献资料法,问卷调查法,数据统计法,定量定性法等研究方法对郴州市居民参与健身活动情况进行调查与分析。结果表明,郴州市居民体育消费的意识总体不够高,人们的健身消费局限在运动服装和器械设备等实物消费上,消费观念和结构有所偏差,服务型消费观念还有很大的发展空间;郴州市俱乐部数量逐步增加,但分布不合理,管理水平低,可持续发展能力较差。针对上述的问题提出相应的意见和建议。%  By using the methods of documentary ,questionnaire investigation ,data statistics ,quantitative and qualitative research ,this paper probes into Chenzhou urban residents’ fitness activities and concludes that on the whole the consciousness of the sports consumption isn’t high enough ,people’s fitness consumption is only limited to sports clothing and equipment .There exist problems in the concept and structure and much space in the devel-opment of service consumption .In Chenzhou city clubs increase gradually ,but the distribution is not reasonable , the management is poor and sustainable development ability is weak .In view of the above ,this paper puts forward some corresponding opinions and suggestions .

  8. Hydrodynamics and rheology of active liquid crystals: a numerical investigation.

    Science.gov (United States)

    Marenduzzo, D; Orlandini, E; Yeomans, J M

    2007-03-16

    We report numerical studies of the hydrodynamics and rheology of an active liquid crystal. We confirm the existence of a transition between a passive and an active phase, with spontaneous flow in steady state. We explore how the velocity profile changes with activity, and we point out the difference in behavior for flow-aligning and tumbling materials. We find that an active material can thicken or thin under a flow, or even exhibit both behaviors as the forcing changes. PMID:17501095

  9. Neutron activation analysis of geochemical samples

    International Nuclear Information System (INIS)

    The present paper will describe the work done at the Technical Research Centre of Finland in developing methods for the large-scale activation analysis of samples for the geochemical prospecting of metals. The geochemical prospecting for uranium started in Finland in 1974 and consequently a manually operated device for the delayed neutron activation analysis of uranium was taken into use. During 1974 9000 samples were analyzed. The small capacity of the analyzer made it necessary to develop a completely automated analyzer which was taken into use in August 1975. Since then 20000-30000 samples have been analyzed annually the annual capacity being about 60000 samples when running seven hours per day. Multielemental instrumental neutron activation analysis is used for the analysis of more than 40 elements. Using instrumental epithermal neutron activation analysis 25-27 elements can be analyzed using one irradiation and 20 min measurement. During 1982 12000 samples were analyzed for mining companies and Geological Survey of Finland. The capacity is 600 samples per week. Besides these two analytical methods the analysis of lanthanoids is an important part of the work. 11 lanthanoids have been analyzed using instrumental neutron activation analysis. Radiochemical separation methods have been developed for several elements to improve the sensitivity of the analysis

  10. INVESTIGATION ON ANTIMICROBIAL ACTIVITY OF BIOSURFACTANT PRODUCED BY PSEUDOMONAS FLUORESCENS ISOLATED FROM MANGROVE ECOSYSTEM

    Directory of Open Access Journals (Sweden)

    Govindammal M

    2013-01-01

    Full Text Available The aim of this present study is to investigate the antimicrobial activity of rhamnolipid biosurfactant produced by Pseudomonas fluorescens MFS03 isolated from mangrove forest soil using groundnut oil cake as substrate. The biosurfactant was extracted with an equal amount of ethyl acetate and the concentrated extract was subjected to FT-IR analysis. The important adsorption bands at 3466.24, 2926.45, 1743.47, 1407.30 and 1162.26 cm-1indicate the chemical structure of rhamnolipid. The rhamnolipid biosurfactant was investigated for the potential antimicrobial activity by using disc-diffusion method against Gram positive bacteria (Bacillus subtilis, Listeria monocytogenes, Staphylococcus aureus, Methicillin resistance S. aureus Gram negative bacteria (Escherichia coli, Salmonella typhimurium and a yeast (Candida albicans. The biosurfactant showed distinct antibacterial activity towards tested bacteria and shows an antifungal activity against yeast. The biosurfactant with different concentration was performed for the evaluation of antimicrobial activity. Maximum antimicrobial activity of the biosurfactant (50µl was observed in S. aureus (23 mm and it was found that the biosurfactant activity was dependent on the concentration. So it could be used as a therapeutic agent in pharmaceutical application.

  11. Theory, Investigation and Stability of Cathode Electrocatalytic Activity

    Energy Technology Data Exchange (ETDEWEB)

    Ding, Dong; Liu, Mingfei; Lai, Samson; Blinn, Kevin; Liu, Meilin

    2012-09-30

    conditions. This was also confirmed by x-ray analyses. For example, soft x-ray XANES data reveal that Co cations displace the Mn cations as being more favored to be reduced. Variations in the Sr-O in the annealed LSCF Fourier-transformed (FT) EXAFS suggest that some Sr segregation is occurring, but is not present in the annealed LSM-infiltrated LSCF cathode materials. Further, a surface enhanced Raman technique was also developed into to probe and map LSM and LSCF phase on underlying YSZ substrate, enabling us to capture important chemical information of cathode surfaces under practical operating conditions. Electrochemical models for the design of test cells and understanding of mechanism have been developed for the exploration of fundamental properties of electrode materials. Novel catalyst coatings through particle depositions (SDC, SSC, and LCC) or continuous thin films (PSM and PSCM) were successfully developed to improve the activity and stability of LSCF cathodes. Finally, we have demonstrated enhanced activity and stability of LSCF cathodes over longer periods of time in homemade and commercially available cells by an optimized LSM infiltration process. Microstructure examination of the tested cells did not show obvious differences between blank and infiltrated cells, suggesting that the infiltrated LSM may form a coherent film on the LSCF cathodes. There was no significant change in the morphology or microstructure of the LSCF cathode due to the structural similarity of LSCF and LSM. Raman analysis of the tested cells indicated small peaks emerging on the blank cells that correspond to trace amounts of secondary phase formation during operation (e.g., CoO{sub x}). The formation of this secondary phase might be attributed to performance degradation. In contrast, there was no such secondary phase observed in the LSM infiltrated cells, indicating that the LSM modification staved off secondary phase formation and thus improved the stability.

  12. Aerosol and air pollution study by neutron activation analysis

    International Nuclear Information System (INIS)

    Thermal neutron activation analysis technique was used in air pollution and aerosol elemental content and size distribution investigations. Air pollution samples were collected on Whatman 41 paper filters which were activated along with known quantities of standards in a flux of approximately 1013 nxcm-2xs-1. The activity of the samples was measured with a 40 cm3 Ge(Li) detector and analyzed with the computer program JANE, which identified the isotopes and found their quantities by normalization with the standard measurement results. Correlation between the various elements, in particular those belonging to dust from the desert and those considered typical urban air pollution, is investigated. (author)

  13. Investigating magnetic activity of F stars with the it Kepler mission

    CERN Document Server

    Mathur, S; Ballot, J; Ceillier, T; Salabert, D; Metcalfe, T S; Regulo, C; Jimenez, A; Bloemen, S

    2013-01-01

    The dynamo process is believed to drive the magnetic activity of stars like the Sun that have an outer convection zone. Large spectroscopic surveys showed that there is a relation between the rotation periods and the cycle periods: the longer the rotation period is, the longer the magnetic activity cycle period will be. We present the analysis of F stars observed by Kepler for which individual p modes have been measure and with surface rotation periods shorter than 12 days. We defined magnetic indicators and proxies based on photometric observations to help characterise the activity levels of the stars. With the Kepler data, we investigate the existence of stars with cycles (regular or not), stars with a modulation that could be related to magnetic activity, and stars that seem to show a flat behaviour.

  14. Applications of neutron activation analysis in industry

    International Nuclear Information System (INIS)

    Neutron activation analysis technique is discussed in brief. This technique is used for quality control of raw materials, process materials and finished products, as well as activities in research and development for the improvement of the products and new products. The uses of this technique in several experienced industries are mentioned (author)

  15. On Investigation and Analysis of College Students Taking Part in Extracurricular Physical Activities%川渝地区大学生参与课余体育锻炼的调查与研究

    Institute of Scientific and Technical Information of China (English)

    吴琼先

    2015-01-01

    采用文献资料法、问卷调查法、访谈法和数理统计法,对川渝地区大学生课余体育锻炼现状进行了分析,结果表明:有85.8%的大学生表示喜欢和喜欢参加体育锻炼,但体育态度和体育行为之间不完全一致;男生喜欢体育锻炼的人数比例比女生高;大学生参与体育锻炼的目的多样化,注重体育功能的全面开发;男生喜欢有激烈对抗、趣味性较强的运动,女生喜欢没有直接身体对抗,较为舒缓的运动;大学生锻炼的时间主要集中在傍晚和晚上,高峰时期,绝大部分高校体育场馆设施不够充足;大学生体育人口约为45%,高于全国平均水平,部分学生体育锻炼的方法欠合理;参加体育锻炼的大学生中,以“学校体育场馆”为主要锻炼场所;体育场馆设施不足和缺乏锻炼伙伴是影响大学生参加体育锻炼的主要障碍;大学生的体育消费意识较好;大学生对毕业后继续参加体育锻炼表现出忧虑情绪.%By means of literature consultation ,questionnaire ,interview and mathematical statistics ,inves‐tigation and analysis have been done to discuss the situation on college students taking part in extracurricu‐lar physical activities .T he result show s that 85 .8% of all the students like sports and take part in physical activities ,14 .2% don't like and don't join ,the attitude and behavior to sports are not always same;the proportion of boys take part in exercise is more than girls ;the aim ,that college students take part in exer‐cise ,which emphasize the whole explore about physics function ,is diversification ;boys like those items with intense resistance and strong interest ,but the girls like the sports without intense resistance of body , soft and slow ;the period when students take part in physical exercise is focus on nightfall and evening , during the peak w hen college join exercise ,most of college stadiums have

  16. New studies in forensic neutron activation analysis

    International Nuclear Information System (INIS)

    Three recently completed studies in forensic neutron activation analysis are reported: a study of 0.22-caliber rimfire cartridge primers, a large-scale study of shotgun pellets, and a new 5-element procedure for the analysis of bullet-lead and shotgun-pellet samples. (author) 12 refs

  17. New studies in forensic neutron activation analysis

    International Nuclear Information System (INIS)

    Earlier studies in forensic neutron activation analysis are being extended in This Laboratory. Three of these new studies are reported here: 1) a study of 0.22-caliber rimfire cartridge primers, 2) a large-scale study of shotgun pellets, and 3) a new 5-element procedure for the analysis of bullet-lead and shotgun-pellet samples. (author)

  18. Computational Models for Analysis of Illicit Activities

    DEFF Research Database (Denmark)

    Nizamani, Sarwat

    Numerous illicit activities happen in our society, which, from time to time affect the population by harming individuals directly or indirectly. Researchers from different disciplines have contributed to developing strategies to analyze such activities, in order to help law enforcement agents dev...... population globally sensitive to specific world issues. The models discuss the dynamics of population in response to such issues. All the models presented in the thesis can be combined for a systematic analysis of illicit activities.......Numerous illicit activities happen in our society, which, from time to time affect the population by harming individuals directly or indirectly. Researchers from different disciplines have contributed to developing strategies to analyze such activities, in order to help law enforcement agents...... devise policies to minimize them. These activities include cybercrimes, terrorist attacks or violent actions in response to certain world issues. Beside such activities, there are several other related activities worth analyzing, for which computational models have been presented in this thesis...

  19. Evaluation of business activity using financial analysis

    OpenAIRE

    Kučerová, Martina

    2012-01-01

    Czech University of Life Sciences Prague Faculty of Economics and Management Department of Trade and Accounting Abstract of Diploma Thesis Evaluation of business activity using financial analysis Martina Kučerová © 2012 CULS in Prague Summary: The aim of this thesis is to apply methods of financial analysis on chosen business for its first three accounting periods 2009, 2010 and 2011. The thesis is further analysis of my bachelor thesis on to...

  20. On the problem of efficiency of geophysical investigations in active well equipped with sucker-rod borehole pumps

    International Nuclear Information System (INIS)

    The results are given of an analysis of the data on integrated geophysical investigations (radioactive ones inclusive) in active wells operated by sucker-rod borehole pumps. The analysis makes it possible to select the optimum set of measurements for such wells depending on the degree of flooding, the output, the nature of flooding of layers, and the mineral content of the deposit water

  1. Reactor neutron activation for multielemental analysis

    International Nuclear Information System (INIS)

    Neutron Activation Analysis using single comparator (K0 NAA method) has been used for obtaining multielemental profiles in a variety of matrices related to environment. Gold was used as the comparator. Neutron flux was characterised by determining f, the epithermal to thermal neutron flux ratio and cc, the deviation from ideal shape of the neutron spectrum. The f and a were determined in different irradiation positions in APSARA reactor, PCF position in CIRUS reactor and tray rod position in Dhruva reactor using both cadmium cut off and multi isotope detector methods. High resolution gamma ray spectrometry was used for radioactive assay of the activation products. This technique is being used for multielement analysis in a variety of matrices like lake sediments, sea nodules and crusts, minerals, leaves, cereals, pulses, leaves, water and soil. Elemental profiles of the sediments corresponding to different depths from Nainital lake were determined and used to understand the history of natural absorption/desorption pattern of the previous 160 years. Ferromanganese crusts from different locations of Indian Ocean were analysed with a view to studying the distribution of some trace elements along with Fe and Mn. Variation of Mn/Fe ratio was used to identify the nature of the crusts as hydrogenous or hydrothermal. Fe-rich and Fe-depleted nodules from Indian Ocean were analysed to understand the REE patterns and it is proposed that REE-Th associated minerals could be the potential Th contributors to the sea water and thus reached ferromanganese nodules. Dolomites (unaltered and altered), two types of serpentines and intrusive rock dolerite from the asbestos mines of Cuddapah basin were analysed for major, minor and trace elements. The elemental concentrations are used for distinguishing and characterising these minerals. From our investigations, it was concluded that both dolomite and dolerite contribute elements in the serpentinisation process. Chemical neutron

  2. Neutron activation analysis - an aid to forensic science

    International Nuclear Information System (INIS)

    Forensic Science is oriented towards the examination of evidence specimens, collected from a scene of crime in order to establish the link between the criminal and the crime. This science therefore has a profound role to play in criminal justice delivery system. The importance of neutron activation analysis (NAA) as a specialised technique to aid crime investigation has emerged and has been recognised

  3. Investigating the Jack the Ripper Case: Engaging Students in a Criminal Investigations Class through Active Learning

    Science.gov (United States)

    Gutierrez, Daniel; Kazmi, Syed

    2010-01-01

    The present study examines the utilization of a class project involving the Jack the Ripper murders. Students enrolled in a criminal investigations class were required to investigate the five canonical murders associated with the infamous serial killer known as Jack the Ripper and the murders that occurred in London during 1888. This paper…

  4. Investigation of fMRI activation in the internal capsule

    Directory of Open Access Journals (Sweden)

    Brewer Kimberley D

    2011-06-01

    Full Text Available Abstract Background Functional magnetic resonance imaging (fMRI in white matter has long been considered controversial. Recently, this viewpoint has been challenged by an emerging body of evidence demonstrating white matter activation in the corpus callosum. The current study aimed to determine whether white matter activation could be detected outside of the corpus callosum, in the internal capsule. Data were acquired from a 4 T MRI using a specialized asymmetric spin echo spiral sequence. A motor task was selected to elicit activation in the posterior limb of the internal capsule. Results White matter fMRI activation was examined at the individual and group levels. Analyses revealed that activation was present in the posterior limb of the internal capsule in 80% of participants. These results provide further support for white matter fMRI activation. Conclusions The ability to visualize functionally active tracts has strong implications for the basic scientific study of connectivity and the clinical assessment of white matter disease.

  5. Cytotoxic activity and phytochemical analysis of Arum palaestinum Boiss

    Institute of Scientific and Technical Information of China (English)

    Mai Mohammed Farid; Sameh Reda Hussein; Lamiaa Fawzy Ibrahim; Mohammed Ali El Desouky; Amr Mohammed Elsayed; Ahmad Ali El Oqlah; Mahmoud Mohammed Saker

    2015-01-01

    Objective:To evaluate the in vitro cytotoxic activity of the fractionated extract as well as isolated compounds of Arum palaestinum Boiss. (A. palaestinum) (black calla lily), and to identify the volatile components which may be responsible for the potential antitumor activity. Methods: A. palaestinum was collected from its natural habitats and subjected to phytochemical analysis for separation of pure compounds. In vitro cytotoxic activity was investigated against four human carcinoma cell lines Hep2, HeLa, HepG2 and MCF7 for the fractionated extract and isolated compounds. While, the diethyl ether fraction was subjected to GC–MS analysis as it exhibited the most potent cytotoxic effect to evaluate the active constituents responsible for the cytotoxic activities. Results:Four flavonoid compounds were isolated (luteolin, chrysoeriol, isoorientin, isovitexin) from the diethyl ether and ethyl acetate. The extracts and the pure isolated compounds showed a significant high antiproliferative activity against all investigated cell lines. The GC–MS analysis revealed the separation and identification of 15 compounds representing 95.01%of the extract and belonging to different groups of chemical compounds. Conclusions:The present study is considered to be the first report on the cytotoxic activities carried out on different selected fractions and pure compounds of A. palaestinum to provide evidences for its strong antitumor activities. In addition, chrysoeriol and isovitexin compounds were isolated for the first time from the studied taxa.

  6. Cytotoxic activity and phytochemical analysis of Arum palaestinum Boiss.

    Institute of Scientific and Technical Information of China (English)

    Mai; Mohammed; Farid; Sameh; Reda; Hussein; Lamiaa; Fawzy; Ibrahim; Mohammed; Ali; El; Desouky; Amr; Mohammed; Elsayed; Ahmad; Ali; El; Oqlah; Mahmoud; Mohammed; Saker

    2015-01-01

    Objective: To evaluate the in vitro cytotoxic activity of the fractionated extract as well as isolated compounds of Arum palaestinum Boiss.(A. palaestinum)(black calla lily), and to identify the volatile components which may be responsible for the potential antitumor activity.Methods: A. palaestinum was collected from its natural habitats and subjected to phytochemical analysis for separation of pure compounds. In vitro cytotoxic activity was investigated against four human carcinoma cell lines Hep2, He La, Hep G2 and MCF7 for the fractionated extract and isolated compounds. While, the diethyl ether fraction was subjected to GC–MS analysis as it exhibited the most potent cytotoxic effect to evaluate the active constituents responsible for the cytotoxic activities.Results: Four flavonoid compounds were isolated(luteolin, chrysoeriol, isoorientin,isovitexin) from the diethyl ether and ethyl acetate. The extracts and the pure isolated compounds showed a significant high antiproliferative activity against all investigated cell lines. The GC–MS analysis revealed the separation and identification of 15 compounds representing 95.01% of the extract and belonging to different groups of chemical compounds.Conclusions: The present study is considered to be the first report on the cytotoxic activities carried out on different selected fractions and pure compounds of A. palaestinum to provide evidences for its strong antitumor activities. In addition,chrysoeriol and isovitexin compounds were isolated for the first time from the studied taxa.

  7. SNR analysis: molecular investigation of an anthrax epidemic

    Directory of Open Access Journals (Sweden)

    Adone Rosanna

    2010-02-01

    Full Text Available Abstract Background In Italy, anthrax is endemic but occurs sporadically. During the summer of 2004, in the Pollino National Park, Basilicata, Southern Italy, an anthrax epidemic consisting of 41 outbreaks occurred; it claimed the lives of 124 animals belonging to different mammal species. This study is a retrospective molecular epidemiological investigation carried out on 53 isolates collected during the epidemic. A 25-loci Multiple Locus VNTR Analysis (MLVA MLVA was initially performed to define genetic relationships, followed by an investigation of genetic diversity between epidemic strains through Single Nucleotide Repeat (SNR analysis. Results 53 Bacillus anthracis strains were isolated. The 25-loci MLVA analysis identified all of them as belonging to a single genotype, while the SNR analysis was able to detect the existence of five subgenotypes (SGTs, allowing a detailed epidemic investigation. SGT-1 was the most frequent (46/53; SGTs 2 (4/53, 3 (1/53 4 (1/53 and 5 (1/53 were detected in the remaining seven isolates. Conclusions The analysis revealed the prevalent spread, during this epidemic, of a single anthrax clone. SGT-1 - widely distributed across the epidemic area and present throughout the period in question - may, thus, be the ancestral form. SGTs 2, 3 and 4 differed from SGT-1 at only one locus, suggesting that they could have evolved directly from the latter during the course of this epidemic. SGT-5 differed from the other SGTs at 2-3 loci. This isolate, thus, appears to be more distantly related to SGT-1 and may not be a direct descendant of the lineage responsible for the majority of cases in this epidemic. These data confirm the importance of molecular typing and subtyping methods for in-depth epidemiological analyses of anthrax epidemics.

  8. Doses in radiation accidents investigated by chromosome aberration analysis

    International Nuclear Information System (INIS)

    Results from cytogenetic investigations into 55 cases of suspected over-exposure to radiation during 1977 are reviewed. This report is the seventh in an annual series (previous results were published in NRPB-R5, R10, R23, R35, R41 and R57) which together contain data on 327 studies. Results from all investigations have been pooled for general analysis. Brief accounts are given in an appendix of the circumstances behind the past year's investigations and, where possible, physical estimates of dose have been included for comparison. Two cases are described in more detail: the first concerned a non-classified worker who put an iridium-192 source in his pocket and took it home; and the second involved the accidental contamination of two people with tritium gas. In a second appendix, the confidence limits on cytogenetic dosimetry for X- and γ-ray over-exposures are given and the derivation of these limits is discussed. (author)

  9. Experimental Investigation on Active Cooling for Ceramic Matrix Composite

    Institute of Scientific and Technical Information of China (English)

    PENG Li-na; HE Guo-qiang; LIU Pei-jin

    2009-01-01

    Compared with conventional materials, the active cooling ceramic matrix composite used in ramjet or scramjet makes their structures lighter in mass and better in performance. In this paper, an active and a passive cooling refractory composite specimens are designed and tested with an experimental facility composed of multilayer smale scale cooling penel which consists of a water cooling system and a ceramic matrix composite specimen, and a gas generator used for providing lower and higher transfer rate gases to simulate the temperatures in combustion chamber of ramjst. The active cooling specimen can continuously suffer high surface temperature of 2 000K for 30s and that of 3 000 K for 9.3 s, respectively. The experiment results show that the active cooling composite structure is available for high-temperature condition in ramjet.

  10. Multilocus sequence analysis for Leishmania braziliensis outbreak investigation.

    Directory of Open Access Journals (Sweden)

    Mariel A Marlow

    2014-02-01

    Full Text Available With the emergence of leishmaniasis in new regions around the world, molecular epidemiological methods with adequate discriminatory power, reproducibility, high throughput and inter-laboratory comparability are needed for outbreak investigation of this complex parasitic disease. As multilocus sequence analysis (MLSA has been projected as the future gold standard technique for Leishmania species characterization, we propose a MLSA panel of six housekeeping gene loci (6pgd, mpi, icd, hsp70, mdhmt, mdhnc for investigating intraspecific genetic variation of L. (Viannia braziliensis strains and compare the resulting genetic clusters with several epidemiological factors relevant to outbreak investigation. The recent outbreak of cutaneous leishmaniasis caused by L. (V. braziliensis in the southern Brazilian state of Santa Catarina is used to demonstrate the applicability of this technique. Sequenced fragments from six genetic markers from 86 L. (V. braziliensis strains from twelve Brazilian states, including 33 strains from Santa Catarina, were used to determine clonal complexes, genetic structure, and phylogenic networks. Associations between genetic clusters and networks with epidemiological characteristics of patients were investigated. MLSA revealed epidemiological patterns among L. (V. braziliensis strains, even identifying strains from imported cases among the Santa Catarina strains that presented extensive homogeneity. Evidence presented here has demonstrated MLSA possesses adequate discriminatory power for outbreak investigation, as well as other potential uses in the molecular epidemiology of leishmaniasis.

  11. Investigating stellar activity with CoRoT observations

    CERN Document Server

    Mathur, S; Garcia, R A; Regulo, C; Ballot, J; Metcalfe, T S

    2011-01-01

    Recently, the study of the CoRoT target HD 49933 showed evidence of variability of its magnetic activity. This was the first time that a stellar activity was detected using asteroseismic data. For the Sun and HD 49933, we observe an increase of the p-mode frequencies and a decrease of the maximum amplitude per radial mode when the activity level is higher. Moreover a similar behavior of the frequency shifts with frequency has been found between the Sun and HD 49933. We study 3 other targets of CoRoT as well, for which modes have been detected and well identified: HD 181420, HD 49385, and HD 52265 (which is hosting a planet). We show how the seismic parameters (frequency shifts and amplitude) vary during the observation of these stars.

  12. Human hair neutron activation analysis: analysis on population level, mapping

    International Nuclear Information System (INIS)

    Neutron activation analysis is an outstanding analytical method having very wide applications in various fields. Analysis of human hair within last decades mostly based on neutron activation analysis is a very attractive illustration of the application of nuclear analytical techniques. Very interesting question is how the elemental composition differs in different areas or cities. In this connection the present paper gives average data and maps of various localities in the vicinity of drying-out Aral Sea and of various industrial cities in Central Asia. (author)

  13. Investigation and analysis on physical activity between baccalaureate nursing probationers and nursing students%本科实习护生与在校高年级护生身体活动的现状调查

    Institute of Scientific and Technical Information of China (English)

    邹芳亮; 高钰琳

    2014-01-01

    Objective To survey the physical activity status of baccalaureate nursing probationers and compare these differences.Methods By convenient sampling method,the International Physical Activity Questionnaire (IPAQ) was used to collect the data of 80 baccalaureate nursing probationers and 84 baccalaureate nursing students randomly.Results (1)Within a week,the time of baccalaureate nursing students in internship and school engaged in all kinds of physical activities had obviously significant differences,the overall physical activities time of nursing students was more than baccalaureate nursing probationers.They both spent less time on leisure time physical activity,but more on sitting life-style.(2)The metabolic equivalent (MET) of baccalaureate nursing probationers in internship and school engaged in all kinds of physical activities had obvious significant differences,the all physical activities metabolic equivalent (MET) of baccalaureate nursing probationers was more than nursing students.The metabolic equivalent (MET) consumed by work physical activities such as walking was the most.Conclusions The work physical activity of baccalaureate nursing probationers is far great,and students lack of the leisure time physical activity; medical schools and teaching hospitals should be strengthened to cultivate the awareness of students' activities,and promote the physical and mental health of students.%目的 了解本科实习护生与在校高年级护生的身体活动现状.方法 采用便利抽样的方法,应用国际身体活动量表汉化版(IPAQ)长卷对80名本科实习护生和84名本科在校护生的身体活动情况进行调查分析.结果 (1)本科实习护生与在校护生1周内从事各项身体活动的时间比较差异有统计学意义,在校护生总身体活动时间多于实习护生,2类护生均闲暇时身体活动少,静坐时间长;(2)本科实习护生与在校护生1周内从事各项身体活动的能量消耗比较差异有统计学

  14. Neutron activation spectrometry and neutron activation analysis in analytical geochemistry

    International Nuclear Information System (INIS)

    The present report is to show the geochemists who are interested in neutron activation spectrometry (NAS) and neutron activation analysis (NAA) which analytical possibilities these methods offer him. As a review of these analytical possibilities, a lieterature compolation is given which is subdivided into two groups: 1) rock (basic, intermediary, acid, sediments, soils and nuds, diverse minerals, tectites, meteorites and lunar material). 2) ore (Al, Au, Be, Cr, Cu, Mn, Mo, Fe, Pb, Pt, Sn, Ti, W, Zn, Zr, U and phosphate ore, polymetallic ores, fluorite, monazite and diverse ores). The applied methods as well as the determinable elements in the given materials can be got from the tables. On the whole, the literature evaluation carried out makes it clear that neutron activation spectrometry is a very useful multi-element method for the analysis of rocks. The analysis of ores, however, is subjected to great limitations. As rock analysis is very frequently of importance in prospecting for ore deposits, the NAS proves to be extremely useful for this very field of application. (orig./LH)

  15. PRELIMINARY PHYTOCHEMICAL INVESTIGATION AND ANTHELMINTIC ACTIVITY OF MORINGA OLEIFERA LEAVES

    OpenAIRE

    Srinivasa U; Amrutia Jay N; Katharotiya Reena; Moses Semuel Rajan

    2011-01-01

    Petroleum ether, chloroform, methanol and aqueous extracts of leaves of Moringa oleifera were screened for various bioactive constituents like glycosides, carbohydrates, tannins, flavonoids, triterpenoids and alkaloids. The chloroform and methanol extracts were evaluated for anthelmintic activity on adult Indian earthworms Pheritima postuma using Piperazine citrate and Rajah Pravartani Vati (Ayurvedic preparation) as a reference standards. The results obtained indicated that the chloroform ex...

  16. [Investigation of Aerosol Mixed State and CCN Activity in Nanjing].

    Science.gov (United States)

    Zhu, Lin; Ma, Yan; Zheng, Jun; Li, Shi-zheng; Wang, Li-peng

    2016-04-15

    During 11-18 September 2014, the size-resolved aerosol Cloud Condensation Nuclei (CCN) activity and mixing state were measured using Cloud Condensation Nuclei Counter (CCNC), Aerosol Particle Mass (APM) and Scanning Mobility Particle Sizer (SMPS). The results showed that aerosols mainly existed as an internal mixture. For 76, 111, 138 and 181 nm particles, black carbon (BC) accounted for 5.4%, 10%, l0.7% and 6.7% of the particle mass, but as high as 51%, 57%, 70% and 59% of the particle number concentrations, respectively, suggesting that BC was a type of important condensation nuclei in the atmosphere and made significant contributions to particle numbers. The occasionally observed external mixtures were mainly present in 111 and 138 nm particles. The critical supersaturation was 0.25%, 0.13%, 0.06% and 0.015% for 76, 111, 138 and 181 nm particles, respectively. Precipitation and haze had significant effects on the particle CCN activity. The hygroscopicity parameter K was 0.37, 0.29 and 0.39 in rainy, clear and hazy days, respectively. Particle density and CCN activity were impacted by chemical compositions. Compared with clear days, higher contents of inorganic salts and lower contents of organics were found on hazy days, accompanied by lower particle density and higher CCN activity. PMID:27548938

  17. The Investigation and Analysis on Women Workers' Physical Activity in Ningbo City%宁波市女职工体育健身活动情况调研分析

    Institute of Scientific and Technical Information of China (English)

    周建伟; 陆亨伯

    2001-01-01

    By using the method of questionnaire, documentary and mathematical statistics, t he author analyzes the present situation of women workers' physical activity. T he result shows that most women workers often participate in physical activity. Their motivation is not single, but manifold. The time of their physical activ ity is between 10~30 min, the sports event, place and form is affected by their age. The heavy housework, busy work and disliking physical activity is the main factor that affect their participating in sports activity.%运用问卷调查、文献资料和数理统计等方法,对当前宁 波市女职工参加体育健身活动情况进行调研分析。结果发现:大部分女职工经常和有时参加 体育健身活动;她们参加体育健身活动的动机是多层次的;活动的时间大多数为10~30 m in;在选择健身活动项目、形式和场所时都带有明显的年龄特征;家务重、工作忙、无时间 和本身不喜欢体育活动是影响她们参加体育健身活动的最主要因素。

  18. Active Greens : An Analysis of the Determinants of Green Party Members' Activism in Environmental Movements

    NARCIS (Netherlands)

    Botetzagias, Iosif; van Schuur, Wijbrandt

    2012-01-01

    This article investigates green party members' activism in the environmental movement and tests how a number of predictors, theoretically suggested in the past yet rarely empirically tested, can account for it. The authors' analysis is based on an extensive data set of members of 15 green parties in

  19. High-capacity neutron activation analysis facility

    International Nuclear Information System (INIS)

    A high-capacity neutron activation analysis facility, the Reactor Activation Facility, was designed and built and has been in operation for about a year at one of the Savannah River Plant's production reactors. The facility determines uranium and about 19 other elements in hydrogeochemical samples collected in the National Uranium Resource Evaluation program, which is sponsored and funded by the United States Department of Energy, Grand Junction Office. The facility has a demonstrated average analysis rate of over 10,000 samples per month, and a peak rate of over 16,000 samples per month. Uranium is determined by cyclic activation and delayed neutron counting of the U-235 fission products; other elements are determined from gamma-ray spectra recorded in subsequent irradiation, decay, and counting steps. The method relies on the absolute activation technique and is highly automated for round-the-clock unattended operation

  20. Activation analysis of air particulate matter

    International Nuclear Information System (INIS)

    This review on activation analysis of air particulate matter is an extended and updated version of a review given by the same authors in 1985. The main part is aimed at the analytical scheme and refers to rules and techniques for sampling, sample and standard preparation, irradiation and counting procedures, as well as data processing, - evaluation, and - presentation. Additional chapters deal with relative and monostandard methods, the use of activation analysis for atmosphere samples in various localities, and level of toxic and other elements in the atmosphere. The review contains 190 references. (RB)

  1. Design of Neutron Activation Analysis Laboratorium Room

    International Nuclear Information System (INIS)

    Base on the planning to increase of the research and service quality in the ''Neutron activation analysis'' (APN),the design of mentioned ''Neutron activation analysis laboratories room'' has been done in the multi purpose reactor G.A. Siwabessy. By the using the designed installation, the irradiation preparation and counting sample can be done. The design doing by determination of installation lay out and maximum particle contain in the air. The design installation required a unit of 1 HP blower, a unit of 1 HP split air condition and 2 units 1200 x 800 mm HEPA filter. This paper concluded that this design is feasible to fabricated

  2. Antimicrobial activity and chemical investigation of Brazilian Drosera.

    Science.gov (United States)

    Ferreira, Dalva Trevisan; Andrei, César Cornélio; Saridakis, Halha Ostrensky; Faria, Terezinha de Jesus; Vinhato, Elisângela; Carvalho, Kátia Eliane; Daniel, Juliana Feijó Souza; Machado, Sílvio Luiz; Saridakis, Dennis Panayotis; Braz-Filho, Raimundo

    2004-11-01

    The antimicrobial activity of three different extracts (hexanic, ethyl acetate, methanol) obtained from Brazilian Drosera species (D. communis, D. montana var. montana, D. brevifolia, D. villosa var. graomogolensis, D. villosa var. villosa, Drosera sp. 1, and Drosera sp. 2 ) were tested against Staphylococcus aureus (ATCC 25923), Enterococcus faecium (ATCC23212), Pseudomonas aeruginosa (ATCC27853), Escherichia coli (ATCC11229), Salmonella choleraesuis (ATCC10708), Klebsiella pneumoniae (ATCC13883), and Candida albicans (a human isolate). Better antimicrobial activity was observed with D. communis and D. montana var. montana ethyl acetate extracts. Phytochemical analyses from D. communis, D. montana var. montana and D. brevifolia yielded 5-hydroxy-2-methyl-1,4-naphthoquinone (plumbagin); long chain aliphatic hydrocarbons were isolated from D. communis and from D. villosa var. villosa, a mixture of long chain aliphatic alcohols and carboxylic acids, was isolated from D. communis and 3b-O-acetylaleuritolic acid from D. villosa var. villosa. PMID:15654434

  3. Investigation and modelling of rare-earth activated waveguide structures

    International Nuclear Information System (INIS)

    In this paper the overview of the recent study on the rare-earth activated waveguides performed in the Optoelectronic Department of IMiO is presented. We reported on the development of rare earth-doped fluorozirconate (ZBLAN) glass fibers that allow a construction of a new family of visible and ultraviolet fiber lasers pumped by upconversion. Especially the performance of holmium devices is presented. The properties of laser planar waveguides obtained by the LPE process and the growth conditions of rare earths doped YAG layers are presented. In this paper we present also the theoretical study of the nonlinear operation of planar waveguide laser, as an example the microdisk Nd:YAG structure is discussed. We derived an approximate formula which relates the small signal gain in the Nd:YAG active medium and the laser characteristics, obtained for whispering-gallery modes and radial modes, to the output power and real parameters of the laser structure (authors)

  4. Antimicrobial activity and chemical investigation of Brazilian Drosera

    Directory of Open Access Journals (Sweden)

    Dalva Trevisan Ferreira

    2004-11-01

    Full Text Available The antimicrobial activity of three different extracts (hexanic, ethyl acetate, methanol obtained from Brazilian Drosera species (D. communis, D. montana var. montana, D. brevifolia, D. villosa var. graomogolensis, D. villosa var. villosa, Drosera sp. 1, and Drosera sp. 2 were tested against Staphylococcus aureus (ATCC 25923, Enterococcus faecium (ATCC23212, Pseudomonas aeruginosa (ATCC27853, Escherichia coli (ATCC11229, Salmonella choleraesuis (ATCC10708, Klebsiella pneumoniae (ATCC13883, and Candida albicans (a human isolate. Better antimicrobial activity was observed with D. communis and D. montana var. montana ethyl acetate extracts. Phytochemical analyses from D. communis, D. montana var. montana and D. brevifolia yielded 5-hydroxy-2-methyl-1,4-naphthoquinone (plumbagin; long chain aliphatic hydrocarbons were isolated from D. communis and from D. villosa var. villosa, a mixture of long chain aliphatic alcohols and carboxylic acids, was isolated from D. communis and 3b-O-acetylaleuritolic acid from D. villosa var. villosa.

  5. In-EDTA as activable tracer in hydrogeological investigations

    International Nuclear Information System (INIS)

    Two experiments are presented, on the possibilities of the use of indium in the form of the In-EDTA complex, as an activable tracer for hydrogeological studies. The determination of indium concentrations in the sampled water has been carried out by using the coprecipitation of indium with bismuth hydroxide, the neutron activation at the VVR-S reactor of the Institute for Nuclear Physics and Engineering - Bucharest and the measurement on the 417.0 keV line of sup(116m)In with the Ge(Li) spectrometric device. The advantages of the utilization of In-EDTA as a tracer for marking large volumes of water and of some long transit waters (of the order of months) have resulted. (authors)

  6. Antimicrobial activity and chemical investigation of Brazilian Drosera

    OpenAIRE

    Dalva Trevisan Ferreira; César Cornélio Andrei; Halha Ostrensky Saridakis; Terezinha de Jesus Faria; Elisângela Vinhato; Kátia Eliane Carvalho; Juliana Feijó de Souza Daniel; Sílvio Luiz Machado; Dennis Panayotis Saridakis; Raimundo Braz-Filho

    2004-01-01

    The antimicrobial activity of three different extracts (hexanic, ethyl acetate, methanol) obtained from Brazilian Drosera species (D. communis, D. montana var. montana, D. brevifolia, D. villosa var. graomogolensis, D. villosa var. villosa, Drosera sp. 1, and Drosera sp. 2 ) were tested against Staphylococcus aureus (ATCC 25923), Enterococcus faecium (ATCC23212), Pseudomonas aeruginosa (ATCC27853), Escherichia coli (ATCC11229), Salmonella choleraesuis (ATCC10708), Klebsiella pneumoniae (ATCC1...

  7. PRELIMINARY PHYTOCHEMICAL INVESTIGATION AND ANTHELMINTIC ACTIVITY OF MORINGA OLEIFERA LEAVES

    Directory of Open Access Journals (Sweden)

    Srinivasa U

    2011-08-01

    Full Text Available Petroleum ether, chloroform, methanol and aqueous extracts of leaves of Moringa oleifera were screened for various bioactive constituents like glycosides, carbohydrates, tannins, flavonoids, triterpenoids and alkaloids. The chloroform and methanol extracts were evaluated for anthelmintic activity on adult Indian earthworms Pheritima postuma using Piperazine citrate and Rajah Pravartani Vati (Ayurvedic preparation as a reference standards. The results obtained indicated that the chloroform extract was more potent compared to other extracts.

  8. Investigating the naval logistics role in humanitarian assistance activities

    OpenAIRE

    Gardner, Maxine J.

    2015-01-01

    Approved for public release; distribution is unlimited According to Department of Defense (DOD) Instruction 2205.02 (June 23, 2014), DOD components must conduct humanitarian and civic assistance (HCA) activities in response to regional conflicts or natural disasters. The Under Secretary of Defense for Policy determines how HCA policy is coordinated and implemented within the DOD and delegates responsibility to the regional combatant commands. In past modeling efforts for disaster relief, s...

  9. Investigation, experiment and analysis on PWR sump screen clogging issue

    International Nuclear Information System (INIS)

    JNES has been conducting experimental and analytical study to develop an evaluation method concerning the downstream effect of the sump screen clogging issue during LOCA in PWR plants. Flow clogging characteristics were investigated based on data for the relation of pressure loss and flow velocity during flow clogging due to debris accumulation. Deposition of chemical precipitates on the fuel cladding using an electrically heated rod was investigated. A test shows chemical precipitates deposited on the cladding and the deposit was mainly analyzed to be calcium compounds. The analysis with a thermal-hydraulic code on the downstream effect has shown that the core could be cooled because the core inlet flow compensates a evaporation of coolant due to the decay-heat even if core inlet was 99% clogged just after the ECCS recirculation operation started during the cold-leg break LOCA in PWR plants. (author)

  10. Investigation of Staphylococcus aureus Isolation and Thermonuclease Activity and Enterotoxin Formation in Some Dairy Desserts

    OpenAIRE

    ALİŞARLI, Mustafa; SANCAK, Yakup Can; Akkaya, Levent; ELİBOL, Cihangir

    2003-01-01

    In this study, the isolation of Staphylococcus aureus from dairy desserts, and its thermonuclease activity and enterotoxigenic properties were investigated. A total of 175 samples were analyzed consisting of 100 pudding samples (sütlaç [rice pudding] 25, keşkül [milk pudding containing coconut] 30, supangile [chocolate pudding] 25, kazandibi [milk pudding slightly burned on the bottom] 20) and 75 cream pastries (butter-cream 25, chocolate-cream 25, fruit-cream 25). According to the analysis...

  11. INVESTIGATION ON ANTIMICROBIAL ACTIVITY OF BIOSURFACTANT PRODUCED BY PSEUDOMONAS FLUORESCENS ISOLATED FROM MANGROVE ECOSYSTEM

    OpenAIRE

    Govindammal M; Parthasarathi R

    2013-01-01

    The aim of this present study is to investigate the antimicrobial activity of rhamnolipid biosurfactant produced by Pseudomonas fluorescens MFS03 isolated from mangrove forest soil using groundnut oil cake as substrate. The biosurfactant was extracted with an equal amount of ethyl acetate and the concentrated extract was subjected to FT-IR analysis. The important adsorption bands at 3466.24, 2926.45, 1743.47, 1407.30 and 1162.26 cm-1indicate the chemical structure of rhamnolipid. The rhamnoli...

  12. Investigating Research Streams of Conjoint Analysis: A Bibliometric Study

    Directory of Open Access Journals (Sweden)

    Thorsten Teichert

    2010-05-01

    Full Text Available Conjoint analysis (CA is one of the most important methods for preference elicitation. In this paper we investigate the intellectual structure within the conjoint analytical research community. Analyses based on single papers provide a method-based overview of streams of conjoint research. By using novel bibliometric techniques in this field we complement findings of existing reviews. We use co-citation and factor analysis of the most cited articles in SSCI to identify the most important articles and research streams. Seven research streams are revealed which are visualized by means of multidimensional scaling. Tables and graphics reveal the disciplinary affiliations of contributors to CA, the special structure within the classes as well as links between them.

  13. Quality assurance in biomedical neutron activation analysis

    International Nuclear Information System (INIS)

    The summary report represents an attempt to identify some of the possible sources of error in in vitro neutron activation analysis of trace elements applied to specimens of biomedical origin and to advise on practical means to avoid them. The report is intended as guidance for all involved in analysis, including sample collection and preparation for analysis. All these recommendations constitute part of quality assurance which is here taken to encompass the two concepts - quality control and quality assessment. Quality control is the mechanism established to control errors, while quality assessment is the mechanism used to verify that the analytical procedure is operating within acceptable limits

  14. Structural Analysis Extended with Active Fault Isolation - Methods and Algorithms

    DEFF Research Database (Denmark)

    Gelso, Esteban R.; Blanke, Mogens

    2009-01-01

    Isolability of faults is a key issue in fault diagnosis whether the aim is maintenance or active fault-tolerant control. It is often encountered that while faults are detectable, they are only group-wise isolable from a usual diagnostic point of view. However, active injection of test signals on...... system inputs can considerably enhance fault isolability. This paper investigates this possibility of active fault isolation from a structural point of view. While such extension of the structural analysis approach was suggested earlier, algorithms and case studies were needed to explore this theory. The...

  15. Investigations on Inhibitors of Hedgehog Signal Pathway: A Quantitative Structure-Activity Relationship Study

    Directory of Open Access Journals (Sweden)

    Zhiwei Cao

    2011-05-01

    Full Text Available The hedgehog signal pathway is an essential agent in developmental patterning, wherein the local concentration of the Hedgehog morphogens directs cellular differentiation and expansion. Furthermore, the Hedgehog pathway has been implicated in tumor/stromal interaction and cancer stem cell. Nowadays searching novel inhibitors for Hedgehog Signal Pathway is drawing much more attention by biological, chemical and pharmological scientists. In our study, a solid computational model is proposed which incorporates various statistical analysis methods to perform a Quantitative Structure-Activity Relationship (QSAR study on the inhibitors of Hedgehog signaling. The whole QSAR data contain 93 cyclopamine derivatives as well as their activities against four different cell lines (NCI-H446, BxPC-3, SW1990 and NCI-H157. Our extensive testing indicated that the binary classification model is a better choice for building the QSAR model of inhibitors of Hedgehog signaling compared with other statistical methods and the corresponding in silico analysis provides three possible ways to improve the activity of inhibitors by demethylation, methylation and hydroxylation at specific positions of the compound scaffold respectively. From these, demethylation is the best choice for inhibitor structure modifications. Our investigation also revealed that NCI-H466 served as the best cell line for testing the activities of inhibitors of Hedgehog signal pathway among others.

  16. Virtual Investigations of an Active Deep Sea Volcano

    Science.gov (United States)

    Sautter, L.; Taylor, M. M.; Fundis, A.; Kelley, D. S.; Elend, M.

    2013-12-01

    Axial Seamount, located on the Juan de Fuca spreading ridge 300 miles off the Oregon coast, is an active volcano whose summit caldera lies 1500 m beneath the sea surface. Ongoing construction of the Regional Scale Nodes (RSN) cabled observatory by the University of Washington (funded by the NSF Ocean Observatories Initiative) has allowed for exploration of recent lava flows and active hydrothermal vents using HD video mounted on the ROVs, ROPOS and JASON II. College level oceanography/marine geology online laboratory exercises referred to as Online Concept Modules (OCMs) have been created using video and video frame-captured mosaics to promote skill development for characterizing and quantifying deep sea environments. Students proceed at their own pace through a sequence of short movies with which they (a) gain background knowledge, (b) learn skills to identify and classify features or biota within a targeted environment, (c) practice these skills, and (d) use their knowledge and skills to make interpretations regarding the environment. Part (d) serves as the necessary assessment component of the laboratory exercise. Two Axial Seamount-focused OCMs will be presented: 1) Lava Flow Characterization: Identifying a Suitable Cable Route, and 2) Assessing Hydrothermal Vent Communities: Comparisons Among Multiple Sulfide Chimneys.

  17. Synthesis of marmycin A and investigation into its cellular activity

    Science.gov (United States)

    Cañeque, Tatiana; Gomes, Filipe; Mai, Trang Thi; Maestri, Giovanni; Malacria, Max; Rodriguez, Raphaël

    2015-09-01

    Anthracyclines such as doxorubicin are used extensively in the treatment of cancers. Anthraquinone-related angucyclines also exhibit antiproliferative properties and have been proposed to operate via similar mechanisms, including direct genome targeting. Here, we report the chemical synthesis of marmycin A and the study of its cellular activity. The aromatic core was constructed by means of a one-pot multistep reaction comprising a regioselective Diels-Alder cycloaddition, and the complex sugar backbone was introduced through a copper-catalysed Ullmann cross-coupling, followed by a challenging Friedel-Crafts cyclization. Remarkably, fluorescence microscopy revealed that marmycin A does not target the nucleus but instead accumulates in lysosomes, thereby promoting cell death independently of genome targeting. Furthermore, a synthetic dimer of marmycin A and the lysosome-targeting agent artesunate exhibited a synergistic activity against the invasive MDA-MB-231 cancer cell line. These findings shed light on the elusive pathways through which anthraquinone derivatives act in cells, pointing towards unanticipated biological and therapeutic applications.

  18. Laboratory Investigations on Estuary Salinity Mixing: Preliminary Analysis

    Directory of Open Access Journals (Sweden)

    F. H. Nuryazmeen

    2014-05-01

    Full Text Available Estuaries are bodies of water along the coasts that are formed when fresh water from rivers flows into and mixes with salt water from the ocean. The estuaries serve as a habitat to some aquatic lives, including mangroves. Human-induced activities such as dredging of shipping lanes along the bottom estuarine, the disposal of industrial wastes into the water system and shoreline development influence estuarine dynamics which include mixing process. These activities might contribute to salinity changes and further adversely affect the estuarine ecosystem. In order to study at the characteristics of the mixing between salt water (estuary and freshwater (river, a preliminary investigation had been done in the laboratory. Fresh water was released from one end of the flume and overflowing at weir at the other end. Meanwhile, salt water was represented by the red dye tracer released through a weir and intruded upstream as a gravity current. The isohalines are plotted to see the salinity patterns. Besides, to examine the spatial and temporal salinity profiles along the laboratory investigations, the plotted graphs have been made. The results show that the changes in salinity level along the flume due to mixing between fresh water and salt water. This showed typical salt-wedge estuary characteristics.

  19. Prompt gamma-ray activation analysis (PGAA)

    Energy Technology Data Exchange (ETDEWEB)

    Kern, J. [Fribourg Univ. (Switzerland). Inst. de Physique

    1996-11-01

    The paper deals with a brief description of the principles of prompt gamma-ray activation analysis (PGAA), with the detection of gamma-rays, the PGAA project at SINQ and with the expected performances. 8 figs., 3 tabs., 10 refs.

  20. The Atomic Fingerprint: Neutron Activation Analysis

    Energy Technology Data Exchange (ETDEWEB)

    Keisch, Bernard [Carnegie-Mellon University

    1972-01-01

    The nuclei of atoms are stable only when they contain certain numbers of neutrons and protons. Since nuclei can absorb additional neutrons, which in many cases results in the conversion of a stable nucleus to a radioactive one, neutron activation analysis is possible.

  1. Isotopic neutron sources for neutron activation analysis

    International Nuclear Information System (INIS)

    This User's Manual is an attempt to provide for teaching and training purposes, a series of well thought out demonstrative experiments in neutron activation analysis based on the utilization of an isotopic neutron source. In some cases, these ideas can be applied to solve practical analytical problems. 19 refs, figs and tabs

  2. Transforming Teacher Education, An Activity Theory Analysis

    Science.gov (United States)

    McNicholl, Jane; Blake, Allan

    2013-01-01

    This paper explores the work of teacher education in England and Scotland. It seeks to locate this work within conflicting sociocultural views of professional practice and academic work. Drawing on an activity theory framework that integrates the analysis of these seemingly contradictory discourses with a study of teacher educators' practical…

  3. Investigating product development strategy in beverage industry using factor analysis

    Directory of Open Access Journals (Sweden)

    Naser Azad

    2013-03-01

    Full Text Available Selecting a product development strategy that is associated with the company's current service or product innovation, based on customers’ needs and changing environment, plays an important role in increasing demand, increasing market share, increasing sales and profits. Therefore, it is important to extract effective variables associated with product development to improve performance measurement of firms. This paper investigates important factors influencing product development strategies using factor analysis. The proposed model of this paper investigates 36 factors and, using factor analysis, we extract six most influential factors including information sharing, intelligence information, exposure strategy, differentiation, research and development strategy and market survey. The first strategy, partnership, includes five sub-factor including product development partnership, partnership with foreign firms, customers’ perception from competitors’ products, Customer involvement in product development, inter-agency coordination, customer-oriented approach to innovation and transmission of product development change where inter-agency coordination has been considered the most important factor. Internal strengths are the most influential factors impacting the second strategy, intelligence information. The third factor, introducing strategy, introducing strategy, includes four sub criteria and consumer buying behavior is the most influencing factor. Differentiation is the next important factor with five components where knowledge and expertise in product innovation is the most important one. Research and development strategy with four sub-criteria where reducing product development cycle plays the most influential factor and finally, market survey strategy is the last important factor with three factors and finding new market plays the most important role.

  4. Simulated, Emulated, and Physical Investigative Analysis (SEPIA) of networked systems.

    Energy Technology Data Exchange (ETDEWEB)

    Burton, David P.; Van Leeuwen, Brian P.; McDonald, Michael James; Onunkwo, Uzoma A.; Tarman, Thomas David; Urias, Vincent E.

    2009-09-01

    This report describes recent progress made in developing and utilizing hybrid Simulated, Emulated, and Physical Investigative Analysis (SEPIA) environments. Many organizations require advanced tools to analyze their information system's security, reliability, and resilience against cyber attack. Today's security analysis utilize real systems such as computers, network routers and other network equipment, computer emulations (e.g., virtual machines) and simulation models separately to analyze interplay between threats and safeguards. In contrast, this work developed new methods to combine these three approaches to provide integrated hybrid SEPIA environments. Our SEPIA environments enable an analyst to rapidly configure hybrid environments to pass network traffic and perform, from the outside, like real networks. This provides higher fidelity representations of key network nodes while still leveraging the scalability and cost advantages of simulation tools. The result is to rapidly produce large yet relatively low-cost multi-fidelity SEPIA networks of computers and routers that let analysts quickly investigate threats and test protection approaches.

  5. Investigations of biomechanical activity of macrophages during phagocytosis

    Science.gov (United States)

    Kovari, Daniel; Curtis, Jennifer

    2012-02-01

    Phagocytosis has traditionally been investigated in terms of the relevant biochemical signaling pathways that trigger the process and lead to the deformation of the cell as it engulfs a target. Physical changes in the cell include rearrangement and polymerization of actin in the phagocytic cup, large membrane deformations, increased membrane area via exocytosis, and closure of the phagocytic cup through membrane fusion. Hence, phagocytosis is a fine-tuned balance between biophysical cellular events and chemical signaling, which are responsible for driving these materials and mechanical changes. We present a series of assays designed to probe the physical/mechanical parameters that govern a cell during phagocytosis. Custom built micropipette manipulators are used to manipulate individual cells, facilitating high-resolution microscopy of individual phagocytic events. This work has been supported by NSF PoLS #0848797.

  6. Ancestry analysis in the 11-M Madrid bomb attack investigation.

    Directory of Open Access Journals (Sweden)

    Christopher Phillips

    Full Text Available The 11-M Madrid commuter train bombings of 2004 constituted the second biggest terrorist attack to occur in Europe after Lockerbie, while the subsequent investigation became the most complex and wide-ranging forensic case in Spain. Standard short tandem repeat (STR profiling of 600 exhibits left certain key incriminatory samples unmatched to any of the apprehended suspects. A judicial order to perform analyses of unmatched samples to differentiate European and North African ancestry became a critical part of the investigation and was instigated to help refine the search for further suspects. Although mitochondrial DNA (mtDNA and Y-chromosome markers routinely demonstrate informative geographic differentiation, the populations compared in this analysis were known to show a proportion of shared mtDNA and Y haplotypes as a result of recent gene-flow across the western Mediterranean, while any two loci can be unrepresentative of the ancestry of an individual as a whole. We based our principal analysis on a validated 34plex autosomal ancestry-informative-marker single nucleotide polymorphism (AIM-SNP assay to make an assignment of ancestry for DNA from seven unmatched case samples including a handprint from a bag containing undetonated explosives together with personal items recovered from various locations in Madrid associated with the suspects. To assess marker informativeness before genotyping, we predicted the probable classification success for the 34plex assay with standard error estimators for a naïve Bayesian classifier using Moroccan and Spanish training sets (each n = 48. Once misclassification error was found to be sufficiently low, genotyping yielded seven near-complete profiles (33 of 34 AIM-SNPs that in four cases gave probabilities providing a clear assignment of ancestry. One of the suspects predicted to be North African by AIM-SNP analysis of DNA from a toothbrush was identified late in the investigation as Algerian in origin. The

  7. Investigation of antioxidant activity and lipophilicity parameters of some preservatives

    Energy Technology Data Exchange (ETDEWEB)

    Korotkova, E.I. [Department of Phys. Anal. Chem., Tomsk Polytechnic University, Lenin 30, Tomsk (Russian Federation) and Scientific Research Center ' Polyant' , Kulagina 5-29, Tomsk (Russian Federation)]. E-mail: eikor@mail.ru; Avramchik, O.A. [Department of Phys. Anal. Chem., Tomsk Polytechnic University, Lenin 30, Tomsk (Russian Federation); Scientific Research Center ' Polyant' , Kulagina 5-29, Tomsk (Russian Federation); Angelov, T.M. [Department of Quality Control, Unipharm-JSCo, Traiko Stanoev 3, Sofia (Bulgaria); Karbainov, Y.A. [Department of Phys. Anal. Chem., Tomsk Polytechnic University, Lenin 30, Tomsk (Russian Federation)

    2005-10-10

    The preservatives have been widely used in food, drugs and cosmetic products to prevent their aging and decay. Antioxidant and antimicrobial activities of some preservatives, such as benzoic acid, sorbic acid and alkyl-parabens, were considered in this work. Study of antioxidant properties of these compounds was carried out by differential pulse voltammetry together with evaluation of their influence on the kinetics of the electrochemical oxygen reduction. Mathematical models of the processes were obtained and their adequacy was estimated using design of experiment methods. As a result, the kinetic parameters of interaction between reactive oxygen species and preservatives were evaluation. Finally, the use of these substances as antimicrobials and antioxidants ensured product stability and safety has been recommended.

  8. Experimental Investigation and Theoretical Modeling of Nanosilica Activity in Concrete

    Directory of Open Access Journals (Sweden)

    Han-Seung Lee

    2014-01-01

    Full Text Available This paper presents experimental investigations and theoretical modeling of the hydration reaction of nanosilica blended concrete with different water-to-binder ratios and different nanosilica replacement ratios. The developments of chemically bound water contents, calcium hydroxide contents, and compressive strength of Portland cement control specimens and nanosilica blended specimens were measured at different ages: 1 day, 3 days, 7 days, 14 days, and 28 days. Due to the pozzolanic reaction of nanosilica, the contents of calcium hydroxide in nanosilica blended pastes are considerably lower than those in the control specimens. Compared with the control specimens, the extent of compressive strength enhancement in the nanosilica blended specimens is much higher at early ages. Additionally, a blended cement hydration model that considers both the hydration reaction of cement and the pozzolanic reaction of nanosilica is proposed. The properties of nanosilica blended concrete during hardening were evaluated using the degree of hydration of cement and the reaction degree of nanosilica. The calculated chemically bound water contents, calcium hydroxide contents, and compressive strength were generally consistent with the experimental results.

  9. Intrinsic network activity in tinnitus investigated using functional MRI.

    Science.gov (United States)

    Leaver, Amber M; Turesky, Ted K; Seydell-Greenwald, Anna; Morgan, Susan; Kim, Hung J; Rauschecker, Josef P

    2016-08-01

    Tinnitus is an increasingly common disorder in which patients experience phantom auditory sensations, usually ringing or buzzing in the ear. Tinnitus pathophysiology has been repeatedly shown to involve both auditory and non-auditory brain structures, making network-level studies of tinnitus critical. In this magnetic resonance imaging (MRI) study, two resting-state functional connectivity (RSFC) approaches were used to better understand functional network disturbances in tinnitus. First, we demonstrated tinnitus-related reductions in RSFC between specific brain regions and resting-state networks (RSNs), defined by independent components analysis (ICA) and chosen for their overlap with structures known to be affected in tinnitus. Then, we restricted ICA to data from tinnitus patients, and identified one RSN not apparent in control data. This tinnitus RSN included auditory-sensory regions like inferior colliculus and medial Heschl's gyrus, as well as classically non-auditory regions like the mediodorsal nucleus of the thalamus, striatum, lateral prefrontal, and orbitofrontal cortex. Notably, patients' reported tinnitus loudness was positively correlated with RSFC between the mediodorsal nucleus and the tinnitus RSN, indicating that this network may underlie the auditory-sensory experience of tinnitus. These data support the idea that tinnitus involves network dysfunction, and further stress the importance of communication between auditory-sensory and fronto-striatal circuits in tinnitus pathophysiology. Hum Brain Mapp 37:2717-2735, 2016. © 2016 The Authors Human Brain Mapping Published by Wiley Periodicals, Inc. PMID:27091485

  10. Radioactive waste package assay facility. Volume 2. Investigation of active neutron and active gamma interrogation

    International Nuclear Information System (INIS)

    Volume 2 of this report describes the theoretical and experimental work carried out at Harwell on active neutron and active gamma interrogation of 500 litre cemented intermediate level waste drums. The design of a suitable neutron generating target in conjunction with a LINAC was established. Following theoretical predictions of likely neutron responses, an experimental assay assembly was built. Responses were measured for simulated drums of ILW, based on CAGR, Magnox and PCM wastes. Good correlations were established between quantities of 235-U, nat-U and D2O contained in the drums, and the neutron signals. Expected sensitivities are -1g of fissile actinide and -100g of total actinide. A measure of spatial distribution is obtainable. The neutron time spectra obtained during neutron interrogation were more complex than expected, and more analysis is needed. Another area of discrepancy is the difference between predicted and measured thermal neutron flux in the drum. Clusters of small 3He proportional counters were found to be much superior for fast neutron detection than larger diameter counters. It is necessary to ensure constancy of electron beam position relative to target(s) and drum, and prudent to measure the target neutron or gamma output as appropriate. 59 refs., 77 figs., 11 tabs

  11. Neutron activation analysis of Etruscan pottery

    International Nuclear Information System (INIS)

    Neutron activation analysis (NAA) has been widely used in archaeology for compositional analysis of pottery samples taken from sites of archaeological importance. Elemental profiles can determine the place of manufacture. At Cornell, samples from an Etruscan site near Siena, Italy, are being studied. The goal of this study is to compile a trace element concentration profile for a large number of samples. These profiles will be matched with an existing data bank in an attempt to understand the place of origin for these samples. The 500 kW TRIGA reactor at the Ward Laboratory is used to collect NAA data for these samples. Experiments were done to set a procedure for the neutron activation analysis with respect to sample preparation, selection of irradiation container, definition of activation and counting parameters and data reduction. Currently, we are able to analyze some 27 elements in samples of mass 500 mg with a single irradiation of 4 hours and two sequences of counting. Our sensitivity for many of the trace elements is better than 1 ppm by weight under the conditions chosen. In this talk, details of our procedure, including quality assurance as measured by NIST standard reference materials, will be discussed. In addition, preliminary results from data treatment using cluster analysis will be presented. (author)

  12. Analysis by neutron activation analysis a some ancient Dacian ceramics

    CERN Document Server

    Olariu, A

    1999-01-01

    Ancient Dacian ceramics, from three different establishments from Romanian territory have been analyzed by neutron activation analysis. A series of elements has been determined: Ba, Eu, K, La, Mn, Na, Sc, Sm. Ba is the element that could be considered to differentiate relatively the three groups of ceramics.

  13. Activity Analysis and Cost Analysis in Medical Schools.

    Science.gov (United States)

    Koehler, John E.; Slighton, Robert L.

    There is no unique answer to the question of what an ongoing program costs in medical schools. The estimates of program costs generated by classical methods of cost accounting are unsatisfactory because such accounting cannot deal with the joint production or joint cost problem. Activity analysis models aim at calculating the impact of alternative…

  14. Investigation, experiment and analysis on PWR sump screen clogging issue

    International Nuclear Information System (INIS)

    JNES has been conducting experimental and analytical study to develop an evaluation method concerning the chemical effect and the downstream effect of the sump screen clogging issue during LOCA in PWR plants. Chemical effect tests show that corrosion of carbon steel and galvanized steal may come to be important in domestic plants, in addition to corrosion of aluminum and insulator which has been considered dominant in the chemical effect. With respect to the downstream effect, deposition of chemical precipitates on the fuel cladding using an electrically heated rod is investigated. A test shows chemical precipitates deposited on the cladding and the deposit was mainly analyzed to be calcium compounds. The analysis on the downstream effect has shown that even if core inlet was completely clogged just after the recirculation operation started during LOCA in PWR plants, although upper part of core may be uncovered temporary and cladding temperature increased, core could be cooled by coolant injection through the hot-leg. (author)

  15. Investigation, Analysis, and Testing of Self-contained Oxygen Generators

    Science.gov (United States)

    Keddy, Christopher P.; Haas, Jon P.; Starritt, Larry

    2008-01-01

    Self Contained Oxygen Generators (SCOGs) have widespread use in providing emergency breathing oxygen in a variety of environments including mines, submarines, spacecraft, and aircraft. These devices have definite advantages over storing of gaseous or liquid oxygen. The oxygen is not generated until a chemical briquette containing a chlorate or perchlorate oxidizer and a solid metallic fuel such as iron is ignited starting a thermal decomposition process allowing gaseous oxygen to be produced. These devices are typically very safe to store, easy to operate, and have primarily only a thermal hazard to the operator that can be controlled by barriers or furnaces. Tens of thousands of these devices are operated worldwide every year without major incident. This report examines the rare case of a SCOG whose behavior was both abnormal and lethal. This particular type of SCOG reviewed is nearly identical to a flight qualified version of SCOG slated for use on manned space vehicles. This Investigative Report is a compilation of a NASA effort in conjunction with other interested parties including military and aerospace to understand the causes of the particular SCOG accident and what preventative measures can be taken to ensure this incident is not repeated. This report details the incident and examines the root causes of the observed SCOG behavior from forensic evidence. A summary of chemical and numerical analysis is provided as a background to physical testing of identical SCOG devices. The results and findings of both small scale and full scale testing are documented on a test-by-test basis along with observations and summaries. Finally, conclusions are presented on the findings of this investigation, analysis, and testing along with suggestions on preventative measures for any entity interested in the safe use of these devices.

  16. Multiscale statistical analysis of coronal solar activity

    CERN Document Server

    Gamborino, Diana; Martinell, Julio J

    2016-01-01

    Multi-filter images from the solar corona are used to obtain temperature maps which are analyzed using techniques based on proper orthogonal decomposition (POD) in order to extract dynamical and structural information at various scales. Exploring active regions before and after a solar flare and comparing them with quiet regions we show that the multiscale behavior presents distinct statistical properties for each case that can be used to characterize the level of activity in a region. Information about the nature of heat transport is also be extracted from the analysis.

  17. Service activities of chemical analysis division

    International Nuclear Information System (INIS)

    Progress of the Division during the year of 1988 was described on the service activities for various R and D projects carrying out in the Institute, for the fuel fabrication and conversion plant, and for the post-irradiation examination facility. Relevant analytical methodologies developed for the chemical analysis of an irradiated fuel, safeguards chemical analysis, and pool water monitoring were included such as chromatographic separation of lanthanides, polarographic determination of dissolved oxygen in water, and automation on potentiometric titration of uranium. Some of the laboratory manuals revised were also included in this progress report. (Author)

  18. The Sample Analysis at Mars Investigation and Instrument Suite

    Science.gov (United States)

    Mahaffy, Paul; Webster, Chris R.; Cabane, M.; Conrad, Pamela G.; Coll, Patrice; Atreya, Sushil K.; Arvey, Robert; Barciniak, Michael; Benna, Mehdi; Bleacher, L.; Brinckerhoff, William B.; Eigenbrode, Jennifer L.; Carignan, Daniel; Cascia, Mark; Chalmers, Robert A.; Dworkin, Jason P.; Errigo, Therese; Everson, Paula; Franz, Heather; Farley, Rodger; Feng, Steven; Frazier, Gregory; Freissinet, Caroline; Glavin, Daniel P.; Harpold, Daniel N.

    2012-01-01

    The Sample Analysis at Mars (SAM) investigation of the Mars Science Laboratory(MSL) addresses the chemical and isotopic composition of the atmosphere and volatilesextracted from solid samples. The SAM investigation is designed to contribute substantiallyto the mission goal of quantitatively assessing the habitability of Mars as an essentialstep in the search for past or present life on Mars. SAM is a 40 kg instrument suite locatedin the interior of MSLs Curiosity rover. The SAM instruments are a quadrupole massspectrometer, a tunable laser spectrometer, and a 6-column gas chromatograph all coupledthrough solid and gas processing systems to provide complementary information on thesame samples. The SAM suite is able to measure a suite of light isotopes and to analyzevolatiles directly from the atmosphere or thermally released from solid samples. In additionto measurements of simple inorganic compounds and noble gases SAM will conducta sensitive search for organic compounds with either thermal or chemical extraction fromsieved samples delivered by the sample processing system on the Curiosity rovers roboticarm.

  19. Investigation of Apple Vibration Characteristics Using Finite Element Modal Analysis

    Directory of Open Access Journals (Sweden)

    R Mirzaei

    2013-02-01

    Full Text Available The most important quality indicator of fruits is the flesh firmness which is well correlated to their young’s modulus. In this research variation of vibration characteristics (shape modes, natural frequency of apple due to change of material characteristics (density, young's models, Poisson ratio and apple volume was investigated using Finite Element simulation. An image processing technique was used to obtain an unsymmetrical and non-spherical geometric model of apple. The exact three-dimensional shape of the fruit was created by determining the coordinates of apple surface and forming uneven rotational curvatures. Modal analysis with no boundary constraints has been applied. The first 20 Eigen frequencies and the corresponding mode shape were determined. Six rigid body modes possess zero resonant frequency which is related to the degree of freedom of a rigid body in space indicated the validity of finite element model. The modal analysis results showed that resonant frequency increased by increasing young's modulus of the fruit, while it decreased by increasing apple density. First mode torsion has a mean resonant frequency of 584 Hz. Variations of natural frequency due to change in young's modulus, density, and Poisson ratio were 80%, 11% and 4%, respectively. Coefficient of variation of resonant frequency in response to changing young's modulus was 2-3 times of that of density which shows the greatest effect of young modulus changes on natural frequency of fruits. Consequently with determination of fruits' natural frequency, their young modulus and firmness can be estimated.

  20. Analysis of volcanic activity patterns using MODIS thermal alerts

    OpenAIRE

    Rothery, Dave A.; Coppola, Diego; Saunders, Charlotte

    2005-01-01

    We investigate eruptive activity by analysis of thermal-alert data from the MODIS (Moderate Resolution Imaging Spectrometer) thermal infrared satellite instrument, detected by the MODVOLC (MODIS Volcano alert) algorithm. These data are openly available on a website, and easy to use. We show how such data can plug major gaps in the conventional monitoring record of volcanoes in an otherwise generally poorly-documented region (Melanesia), including: characterising the mechanism of lava effusion...

  1. Nondestructive gamma activation analysis of mineral materials

    International Nuclear Information System (INIS)

    The basic problems are described related to the use of gamma activation analysis. The applicability was studied of instrumental gamma activation analysis (IGAA) in geology. A number of minerals, rocks, marine sediments and reference materials were studied. For irradiation a betatron and a microtron were used. The results show that IGAA allows the simultaneous determination of a number of trace elements at concentrations of tenths of ppm. The results are given of comparisons made of the analytical possibilities of microtron IGAA and reactor INAA in geology. Tables show the results of the application of IGAA, the main products and parameters of photoexcitation reactions and graphically represented are the gamma spectra of measured materials. (J.B.)

  2. KFUPM fast neutron activation analysis facility

    International Nuclear Information System (INIS)

    A newly established Fast Neutron Activation Analysis facility at the Energy Research Laboratory is described. The facility mainly consists of a fast neutron irradiation station and a gamma ray counting station. Both stations are connected by a fast pneumatic sample transfer system which transports the sample from the irradiation station to the counting station in a short time of 3 s. The fast neutron activation analysis facility has been tested by measuring the 27A(n, α)24Na and 115In(n, n')115mIn cross sections at 14.8 and 2.5 MeV neutron energies, respectively. Within the experimental uncertainties, the measured cross sections for these elements agree with the published values. (orig.)

  3. Reactor neutron activation analysis of industrial materials

    International Nuclear Information System (INIS)

    The specific application of neutron activation analysis (n.a.a.) for industrial materials is demonstrated by the determination of impurities in BeO, Al, Si, Cu, Ge, GaP, GaAs, steel, and irradiated uranium. A group scheme gives an orientation about the possibilities of n.a.a. The use of different standards, methods for the measurement of low radioactivities and errors caused by recoil reaction and radiation stimulated diffusion are discussed. (author)

  4. Investigation of Travel and Activity Patterns Using Location-based Social Network Data: A Case Study of Active Mobile Social Media Users

    Directory of Open Access Journals (Sweden)

    Yeran Sun

    2015-08-01

    Full Text Available Due to its relatively high availability and low cost, location-based social network (LBSN (e.g., Foursquare data (a popular type of volunteered geographic information seem to be an alternative or complement to survey data in the study of travel behavior and activity analysis. Illustrating this situation, recently, a number of studies attempted to use LBSN data (e.g., Foursquare check-ins to investigate patterns of human travel and activity. Of particular note is that compared to other individual-level characteristics of users, such as age, profession, education, income and so forth, gender is relatively highly available in the profiles of Foursquare users. Moreover, considering gender differences in travel and activity analysis is a popular research topic and is helpful in better understanding the changes in women’s roles in family, labor force participation, society and so forth. Therefore, this paper empirically investigates how gender influences the travel and activity patterns of active local Foursquare users in New York City. Empirical investigations of gender differences in travel and activity patterns are conducted at both the individual and aggregate level. The empirical results reveal that there are gender differences in the travel and activity patterns of active local users in New York City at both the individual and aggregate level. Finally, the results of the empirical study and the extent to which LBSN data can be exploited to produce travel diary data are discussed.

  5. Investigation of Travel and Activity Patterns Using Location-based Social Network Data: A Case Study of Active Mobile Social Media Users

    OpenAIRE

    Yeran Sun; Ming Li

    2015-01-01

    Due to its relatively high availability and low cost, location-based social network (LBSN) (e.g., Foursquare) data (a popular type of volunteered geographic information) seem to be an alternative or complement to survey data in the study of travel behavior and activity analysis. Illustrating this situation, recently, a number of studies attempted to use LBSN data (e.g., Foursquare check-ins) to investigate patterns of human travel and activity. Of particular note is that compared to other ind...

  6. 3D-QSAR Investigation of Synthetic Antioxidant Chromone Derivatives by Molecular Field Analysis

    Directory of Open Access Journals (Sweden)

    Jiraporn Ungwitayatorn

    2008-02-01

    Full Text Available A series of 7-hydroxy, 8-hydroxy and 7,8-dihydroxy synthetic chromone derivatives was evaluated for their DPPH free radical scavenging activities. A training set of 30 synthetic chromone derivatives was subject to three-dimensional quantitative structure-activity relationship (3D-QSAR studies using molecular field analysis (MFA. The substitutional requirements for favorable antioxidant activity were investigated and a predictive model that could be used for the design of novel antioxidants was derived. Regression analysis was carried out using genetic partial least squares (G/PLS method. A highly predictive and statistically significant model was generated. The predictive ability of the developed model was assessed using a test set of 5 compounds (r2pred = 0.924. The analyzed MFA model demonstrated a good fit, having r2 value of 0.868 and crossvalidated coefficient r2cv value of 0.771.

  7. Activation Analysis and Public Health. Survey Paper

    International Nuclear Information System (INIS)

    The technique of activation analysis has useful and distinctive applications, not yet fully recognized or exploited, in public health. Three areas of usefulness may be recognized. 1. Industrial hygiene. Activation analysis offers a simple and efficient method for assessing and controlling occupational hazards associated with the handling of toxic materials, such as compounds of arsenic and of mercury. Examination of hair and nail samples, taken at six-monthly intervals, will yield a surprising amount of information regarding the influence on occupational exposure of individual variation in working habits, and inadequacy or non-observance of hygienic rules and other prescribed safety measures. 2. Epidemiology. The advantage conferred by activation analysis lies in the possibility of rapid and accurate estimation of trace element concentrations in small samples of tissue or other materials, such as can readily be obtained from population groups large enough to be statistically significant. Surveys of this kind have interesting potentialities in relation to dental caries, cancer, cirrhosis of the liver and heart disease. 3. Recognition of essential trace elements. Surveys of trace element concentrations suggest that the variability of tissue levels among members of a population is smaller for essential trace elements than for non-essential elements. It is possible also that tissue levels show a normal distribution for essential elements and a log-normal distribution for non-essential elements. (author)

  8. Spatial Determinants on Export marketing activity in Marshallian Districts: An investigation of the Danish Furniture Industry

    DEFF Research Database (Denmark)

    Andersen, Poul Houman

    2002-01-01

    The purpose of the contribution is investigate the role of localised districts on the organisation of export activities in small and medium-sized furniture producers. To what extent do local environments influence the export activities taken on by firms?......The purpose of the contribution is investigate the role of localised districts on the organisation of export activities in small and medium-sized furniture producers. To what extent do local environments influence the export activities taken on by firms?...

  9. The Investigation of Participation Physical Activity and Social Appearance Anxiety at The Preservice Teachers

    Directory of Open Access Journals (Sweden)

    Serdar ALEMDAĞ

    2015-07-01

    Full Text Available The aim of this study is to examine and specify the relationship between the participation of candidate teachers in physical activity and social appearance anxiety according to some variables. 2324 (1483 female, 840 male students participated in this rese arch as an investigation group. “Personal Information Form”, “Variation Stages of Exercise Behaviour Questionnaire” and “Social appearance anxiety scale ” were employed for data collection. The statistical methods used in this research were descriptive sta tistics, the independent group one way ANOVA, the independent group t - Test, Chi – square test and also the correlation analysis for determining the relationship among dependent variables . At the end of the research, it became clear that the students’ parti cipation in physical activity varies depending on gender, department, and n o significant differences were found between class variable . The soscial appearance anxiety have a significant variation in all independent variables. In addition, increasing the level of participation in physical activity , concern for the social appearance anxiety is decreasing . From the results of this prospective teachers , some of the factors that may have become effective in being a qualified teacher , in terms of participation in physical activity is recommended.

  10. Experimental investigation of anti-rheumatoid activity of Pleurotus sajorcaju in adjuvant-induced arthritic rats

    Institute of Scientific and Technical Information of China (English)

    Patel Pinal; Patel Dharmik; Patel Natvarlal

    2012-01-01

    Pleurotus sajorcaju (P.sajorcaju),an edible and non-toxic mushroom,was evaluated as antioxidant,antitumor,anti-inflammatory and antihypertensive activities.P.sajorcaju is a good source of carbohydrates,dietary fiber,essential amino acids,minerals,vitamin B,folic acid and steroids.Anti-inflammatory,immunomodulatory and analgesic activities of aqueous and methanolic extracts of mycelium of P.sajorcaju were investigated (data is not shown).This finding suggests that extracts of P.sajorcaju can be used against inflammatory and autoimmune disease.So,P.sajorcaju examined for its antiarthritic activity.Plant was collected and separately extracted with water and methanol.For antiarthritic activity 500 and 1 000 mg·kg-1 of both extracts were prepared and administered by oral route.Body weight,paw edema (inflammation),hematological parameter,spleen weight,radiological and histological analysis of bone damage were assessed in rats with Freund's adjuvant induced paw inflammation.Both extracts showed significant and dose-dependent anti-inflammatory and anti-arthritic effects compared to control group.

  11. An Investigation And Analysis Of The Main Factors Influencing On The Residents' Leisure Sports Activities In Fuzhou City%影响福州市居民休闲体育活动主要因素的调查与分析

    Institute of Scientific and Technical Information of China (English)

    陈钦

    2011-01-01

    With the methods of literature,investigation,logical analysis and statistics,this paper studies the main factors influencing on the leisure sports activities in Fuzhou residents.The survey results show that the impact of leisure and sports activities of Fuzhou residents factors include: health factor,places of residence from a distance factor,environment factor in leisure sports activities, leisure time factor,mass media factor.And from the multi-disciplinary,multiangle it analyzes the main factors on leisure activities of Fuzhou residents.%采用文献法、调查法、逻辑分析法和统计法,对影响福州市居民休闲体育活动的主要因素进行研究。调查结果表明,影响福州市居民休闲体育活动的主要因素包括:健康因素、活动场所离居住地的距离因素、休闲体育活动的氛围因素、闲暇时间因素、大众传媒因素。并从多学科、多角度对福州市居民休闲体育活动的主要因素展开分析。

  12. Neutron Activation analysis of waste water

    International Nuclear Information System (INIS)

    An instrumental neutron activation analysis for the simultaneous determination of chlorine, bromine, sodium, manganese, cobalt, copper, chromium, zinc, nickel, antimony and iron in waste water is described. They were determined in waste water samples under normal conditions by non-destructive neutron activation simultaneously using a suitable monostandard method. Standardized water samples were used and irradiated in polyethylene ampoules at a neutron flux of 1013 cm-2 s-1 for periods of 1 minute, 1 and 10 hours. A Ge hyperpure detector was used for your activity determination, with count times of 60, 180, 300 and 600 seconds. The obtained results show than the method can be utilized for the determination of this elements without realize anything previous treatment of the samples. (Author)

  13. Analysis of ayurvedic medicinal leaves by instrumental neutron activation analysis

    International Nuclear Information System (INIS)

    Concentrations of 15 elements were determined in medicinally important ayurvedic medicinal leaves. Instrumental neutron activation analysis was employed for the determination of the elements viz. Na, K, Br, Sm, Cr, Zn, Th, Rb, Sr, Fe, La, Co, Ce, Cs and Eu. The samples were neutron irradiated at 100 kW TRIGA -Mainz nuclear reactor and the induced activities were measured by gamma ray spectrometry using an efficiency calibrated high resolution high purity germanium (HPGe) detector. The concentrations of these elements in the medicinal leaves and their medicinal importance are discussed. (author)

  14. Multielemental analysis of soils by instrumental neutron activation analysis

    International Nuclear Information System (INIS)

    The results of an instrumental neutron activation analysis of some elemental concentrations in different soil samples near the industrial areas at Tirupati, India, are reported. Altogether 14 elements, Sm, La, Cr, Co, Zn, Cs, Ce, Th, Rb, Na, K, Sr, Fe and Eu were determined. The samples were irradiated with neutrons at the 100 kW Triga - Mainz research reactor and the induced activities were measured by gamma-ray spectrometry using an efficiency calibrated high resolution high purity germanium (HPGe) detector in connection with a multichannel analyzer. The results are discussed. (author)

  15. Productivity Analysis of Public and Private Airports: A Causal Investigation

    Science.gov (United States)

    Vasigh, Bijan; Gorjidooz, Javad

    2007-01-01

    Around the world, airports are being viewed as enterprises, rather than public services, which are expected to be managed efficiently and provide passengers with courteous customer services. Governments are, increasingly, turning to the private sectors for their efficiency in managing the operation, financing, and development, as well as providing security for airports. Operational and financial performance evaluation has become increasingly important to airport operators due to recent trends in airport privatization. Assessing performance allows the airport operators to plan for human resources and capital investment as efficiently as possible. Productivity measurements may be used as comparisons and guidelines in strategic planning, in the internal analysis of operational efficiency and effectiveness, and in assessing the competitive position of an airport in transportation industry. The primary purpose of this paper is to investigate the operational and financial efficiencies of 22 major airports in the United States and Europe. These airports are divided into three groups based on private ownership (7 British Airport Authority airports), public ownership (8 major United States airports), and a mix of private and public ownership (7 major European Union airports. The detail ownership structures of these airports are presented in Appendix A. Total factor productivity (TFP) model was utilized to measure airport performance in terms of financial and operational efficiencies and to develop a benchmarking tool to identify the areas of strength and weakness. A regression model was then employed to measure the relationship between TFP and ownership structure. Finally a Granger causality test was performed to determine whether ownership structure is a Granger cause of TFP. The results of the analysis presented in this paper demonstrate that there is not a significant relationship between airport TFP and ownership structure. Airport productivity and efficiency is

  16. Offgas Analysis and Pyrolysis Mechanism of Activated Carbon from Bamboo Sawdust by Chemical Activation With KOH

    Institute of Scientific and Technical Information of China (English)

    TIAN Yong; LIU Ping; WANG Xiufang; ZHONG Guoying; CHEN Guanke

    2011-01-01

    Bamboo sawdust was used as the precursor for the multipurpose use of waste.Offgases released during the activation process of bamboo by KOH were investigated quantitatively and qualitatively by a gas analyzer. TG/DTG curves during the pyrolysis process with different impregnation weight ratios (KOH to bamboo) were obtained by a thermogravimetric analyzer. Pyrolysis mechanism of bamboo was proposed. The results showed that the offgases were composed of CO, NO,SO2 and hydrocarbon with the concentration of 1 372, 37, 86, 215 mg/L, respectively. Thermogravimetric analysis indicated that the pyrolytic process mainly experienced two steps. The first was the low temperature activation step (lower than 300 ℃), which was the pre-activation and induction period.The second was the high temperature activation step(higher than 550 ℃), which was a radial activation followed by pore production. The second process was the key to control the pore distribution of the final product.

  17. Industrial applications of neutron activation analysis

    International Nuclear Information System (INIS)

    Neutron activation analysis has been widely used in the industry and over the years played a key role in the development of manufacturing process as well as monitoring of the process flow. In this context NAA has been utilized both in R and D, and in the factory as a flexible analytical tool. It has been used successfully in numerous industries including broad categories such as Chemical, Pharmaceutical, Mining, Photographic, Oil and Gas, Automobile, Defense, Semiconductor and Electronic industries. Dow Chemical owns and operates a research reactor for analytical measurements of samples generated in both R and D, and manufacturing area in its plant in Midland, Michigan. Although most industries do not have reactors on their campus but use an off site reactor regularly, and often have in-house neutron sources such as a 252Cf used primarily for NAA. In most industrial materials analysis laboratory NAA is part of a number of analytical techniques such as ICP-MS, AA, SIMS, FTIR, XRF, TXRF etc. Analysis of complex industrial samples may require data from each of these methods to provide a clear picture of the materials issues involved. With the improvement of classical analytical techniques, and the introduction of new techniques, e.g. TXRF, the role of NAA continues to be a key bench mark technique that provides accurate and reliable data. The strength of the NAA in bulk analysis is balanced by its weakness in providing surface sensitive or spatially resolved analysis as is required by many applications. (author)

  18. Experimental and theoretical investigations on the antioxidant activity of isoorientin from Crotalaria globosa

    Science.gov (United States)

    Deepha, V.; Praveena, R.; Sivakumar, Raman; Sadasivam, K.

    2014-03-01

    The increasing interests in naturally occurring flavonoids are well known for their bioactivity as antioxidants. The present investigations with combined experimental and theoretical methods are employed to determine the radical scavenging activity and phytochemicals present in Crotalaria globosa, a novel plant source. Preliminary quantification of ethanolic extract of leaves shows high phenolic and flavonoid content than root extract; also it is validated through DPPHrad assay. Further analysis is carried out with successive extracts of leaves of varying polarity of solvents. In DPPHrad and FRAP assays, ethyl acetate fraction (EtOAc) exhibit higher scavenging activity followed by ethanol fraction (EtOH) whereas in NOS assay ethanol fraction is slightly predominant over the EtOAc fraction. The LC-MS analysis provides tentative information about the presence of flavonoid C-glycoside in EtOAc fraction (yellow solid). Presence of flavonoid isorientin has been confirmed through isolation (PTLC) and detected by spectroscopy methods (UV-visible and 1H NMR). Utilizing B3LYP/6-311G (d,p) level of theory the structure and reactivity of flavonoid isoorientin theoretically have been explored. The analysis of the theoretical Bond dissociation energy values, for all Osbnd H sites of isoorientin reveals that minimum energy is required to dissociate H-atom from B-ring than A and C-rings. In order to validate the antioxidant characteristics of isoorientin the relevant molecular descriptors IP, HOMO-LUMO, Mulliken spin density analysis and molecular electrostatic potential surfaces have been computed and interpreted. From experimental and theoretical results, it is proved that isoorientin can act as potent antiradical scavenger in oxidative system.

  19. Investigation and analysis on fatigue status of military pilots

    Directory of Open Access Journals (Sweden)

    Jian-sheng GUO

    2012-03-01

    Full Text Available Objective To investigate the fatigue status and its characteristics and influential factors of military pilots. Methods Questionnaire survey was conducted on 924 military pilots by using Fatigue Assessment Instrument (FAI and Fatigue Scale (FS-14, χ2 test and Pearson correlation analysis were performed on the data results with SPSS 17.0 software. Results The findings of fatigue status indicated 343 subjects (37.1% with positive fatigue symptoms and 581 subjects (62.9% with negative fatigue symptoms. FAI factor 1 (severity of fatigue, factor 2 (mental fatigue factor, factor 3 (consequence of fatique and the total score, FS-14 factor 1 (physical fatigue factor and the total score in fatigue-positive group were all higher than those in fatiguenegative group, and the differences were all statistically significant (P 0.05 in the possibility of developing fatigue symptoms between subjects with different aircraft types. Age and flight time were positively correlated with factor 1 and total score in FAI and factor 1, factor 2 and total score in FS-14. However, the aircraft type was associated with neither the individual factors and total score in FAI nor the individual factors and total score in FS-14. Conclusion It is common for military pilots to develop fatigue symptoms, characterized by obvious manifestations of severity, environmental specificity, consequences of fatigue and physical fatigue, and the possibilities of developing fatigue symptoms for different ages and flight time were different.

  20. Investigation and risk factor analysis of hyperuricemia in pilots

    Directory of Open Access Journals (Sweden)

    Hong-yu MA

    2012-01-01

    Full Text Available Objective  To investigate the incidence of hyperuricemia in military pilots and the relationship between hyperuricemia and other related risk factors of cardiovascular diseases. Methods  A total of 2563 pilots, who had undergone a regular physical examination in the Air Force General Hospital from 2005 to 2010, participated in the current study. The participants were divided into high serum uric acid (UA group (hyperuricemia group, UA >420µmol/L, n=294 and normal UA group (n=2269. The incidence rates of hypertension, hyperglycemia, and hyperlipemia were compared between these two groups. The dependent variable was serum UA level of the pilots. Other indices included the total cholesterol (CHO, triglycerides (TG, high density lipoprotein (HDL, low density lipoprotein (LDL, fasting blood glucose (FBG, systolic blood pressure (SBP, diastolic blood pressure (DBP, smoking, body weight, and flight time as independent variable. Logistic multivariate regression analysis was conducted to determine the relationship between UA level and these indexes. Results  The incidence rates of hypertension, hypercholesterolemia, hypertriglyceridemia, low HDL, and high LDL were significantly higher in hyperuricemia group than in normal UA group (POR=1.637, POR=1.025, POR=1.046, PConclusion  The serum UA of pilots is closely related to the risk factors of other cardiovascular diseases.

  1. Pharmacognostical Investigation and Physicochemical Analysis of Celastrus paniculatus Willd. Leaves

    Institute of Scientific and Technical Information of China (English)

    Kalaskar Mohan G.; Saner Sachin Y.; Pawar Manohar V.; Rokade Dipak L; Surana Sanjay J

    2012-01-01

    Objective: Celastrus paniculatus Willd. is an important Indian medicinal plant and widely used in the treatment of the verity of disease and well explored scientifically for their pharmacological properties. The current study was therefore carried out to provide requisite pharmacognostic details about the plant. Methods: Pharmacognostic investigation of the fresh, powdered and anatomical sections of the leaves of Celastrus paniculatus Willd. was carried out to determine its morphological, anatomical, and phytochemical diagnostic features. Quantitative diagnostic characteristics, physicochemical properties and quantitative phytochemical measures were established. Results: The morphology of leave reveled, leaves are alternate, acute, acuminate or obtuse, rounded with cuncate base,; margin is finely crenate, venation is reticulate. The microscopy reveals the dorsiventral type of leave, with anomocytic stomata, covering (lower epidermis) and glandular (upper epidermis) trichomes. The collateral vascular bundle crowned with sclerenchymatous fiber, ideoblast of calcium oxalate. The Quantitative diagnostic characteristics such as leaf constant were measured. Physicochemical properties such as ash, extractive values and fluorescence analysis were established. Quantitative phytochemical revealed presence of carbohydrates, fixed oil, glycosides, cumarines, tannins, flavonoids, saponins, steroids and triterpenoids. Conclusion: The results of the study could be useful in setting some diagnostic indices for the identification and preparation of a monograph of the plant.

  2. Investigation of Lecturer's Chalk by X-Ray Florescence and Fast Neutron Activation Techniques

    International Nuclear Information System (INIS)

    Different samples of lecturer's chalk were studied, using X-ray florescence (XRF) and Fast Neutron Activation Analysis (FNAA) techniques to ensure the safety of its use. The K (X-rays) and the gamma-rays were measured, using Si(Li) and high-purity germanium (HPGe) spectrometers to detect and determine qualitatively and quantitatively the constituents of the studied samples. For the investigated bulk chalk samples, the XRF was used for determination the average neutron flux of 2×107 n/cm2 sec. The concentrations of the elements (Ca and small traces of Al, Fe, Mg and Si) were measured and their presence was confirmed by γ-ray, lifetime and/or XRF measurements.

  3. An investigation of the element composition of superconducting ceramics by neutron activation and radiography methods

    International Nuclear Information System (INIS)

    The neutron activation methods for determining the general composition and distribution of the main components in HTSC ceramics were developed. The conditions for the reduction of the analysis error were discussed. The dependences of the oxygen content and superconducting parameters of single-phase and polyphase yttrium ceramics on the regime of heat treatment in air were investigated. Variation in the oxygen content was found to have a nonmonotone character, depending on the temperature of quenching and annealing. Correlation between the character of the superconducting transition and the oxygen content was observed. During the heat treatment, reversible structural phase transitions proceed in the single-phase ceramics in the polyphase ceramics, the recrystallization processes occur, which result in homogenization of its structure

  4. Regulatory activities of government: analysis of determinants

    Directory of Open Access Journals (Sweden)

    Primož Pevcin

    2006-12-01

    Full Text Available International comparisons show that large cross-country differences exist in the overall macro extent of regulation of the economy. In this context, the main purpose of the article is to investigate, why such differences exist by identifying and empirically verifying the effect of various factors that could potentially shape those differences. Empirical analysis based on the sample of 32 developed and democratic countries revealed that almost 70 % of variation in the macro extent of regulation could be explained with 7 statistically significant explanatory variables. The econometric analysis revealed that the macro extent of regulation decreases with income inequality in society, with the level of economic development, with the sizeof economy, with the share of transfer spending in GDP and with the share of government employment in labour force. On the other hand, the extent of regulation is positively related to government ownership of enterprises and to presidential political regime

  5. Scalable histopathological image analysis via active learning.

    Science.gov (United States)

    Zhu, Yan; Zhang, Shaoting; Liu, Wei; Metaxas, Dimitris N

    2014-01-01

    Training an effective and scalable system for medical image analysis usually requires a large amount of labeled data, which incurs a tremendous annotation burden for pathologists. Recent progress in active learning can alleviate this issue, leading to a great reduction on the labeling cost without sacrificing the predicting accuracy too much. However, most existing active learning methods disregard the "structured information" that may exist in medical images (e.g., data from individual patients), and make a simplifying assumption that unlabeled data is independently and identically distributed. Both may not be suitable for real-world medical images. In this paper, we propose a novel batch-mode active learning method which explores and leverages such structured information in annotations of medical images to enforce diversity among the selected data, therefore maximizing the information gain. We formulate the active learning problem as an adaptive submodular function maximization problem subject to a partition matroid constraint, and further present an efficient greedy algorithm to achieve a good solution with a theoretically proven bound. We demonstrate the efficacy of our algorithm on thousands of histopathological images of breast microscopic tissues. PMID:25320821

  6. An investigation into the application of customer profitability analysis as a strategic decision-making tool in a hospitality environment

    OpenAIRE

    Noone, Breffni M

    1997-01-01

    The primary objective of this study was to investigate the Applicability of Customer Profitability Analysis as a strategic decision-making technique in a hospitality environment. The study commenced with a review of literature in the fields of Yield Management, Customer Profitability Analysis (CPA) and Activity-Based Costing (ABC), with ABC being identified as an appropriate method of costing to use in CPA. Issues arising from the implementation of an Activity-Based CPA including the purpose ...

  7. Activation Analysis and Nuclear Research in Burma

    International Nuclear Information System (INIS)

    Research endeavours in the field of Nuclear Sciences in Burma appear to be concentrated in three main Institutions. These are the Chemistry and Physics Departments of the Rangoon Arts & Science University and the Union of Burma Applied Research Institute (UBARI). In view of possible forthcoming developments an expanded research programme, which is to be implemented on the basis of a five year plan, has been drawn up. Research topics included in this programme are predominantly of practical interest and aimed at a contribution by nuclear methods, in particular activation analysis, to the technological and industrial needs of the country

  8. Investigation of mental fatigue through EEG signal processing based on nonlinear analysis: Symbolic dynamics

    International Nuclear Information System (INIS)

    Highlights: Mental fatigue indices’ variation discussed during simple long-term attentive task. Symbolic dynamics of reaction time and EEG signal determine mental state variation. Nonlinear quantifiers such as entropy can display chaotic behaviors of the brain. Frontal and central lobes of the brain are effective in attention investigations. Mental fatigue causes a reduction in the complexity of the brain’s activity. Abstract: To investigate nonlinear analysis of attention physiological indices this study used a simple repetitive attentive task in four consecutive trials that resulted in mental fatigue. Traditional performance indices, such as reaction time, error responses, and EEG signals, were simultaneously recorded to evaluate differences between the trials. Performance indices analysis demonstrated that a selected task leads to mental fatigue. In addition, the study aimed to find a method to determine mental fatigue based on nonlinear analysis of EEG signals. Symbolic dynamics was selected as a qualitative method used to extract some quantitative qualifiers such as entropy. This method was executed on the reaction time of responses, and EEG signals to distinguish mental states. The results revealed that nonlinear analysis of reaction time, and EEG signals of the frontal and central lobes of the brain could differentiate between attention, and occurrence of mental fatigue in trials. In addition, the trend of entropy variation displayed a reduction in the complexity of mental activity as fatigue occurred.

  9. Investigation of Common Symptoms of Cancer and Reliability Analysis

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    Objective: To identify cancer distribution and treatment requirements, a questionnaire on cancer patients was conducted. It was our objective to validate a series of symptoms commonly used in traditional Chinese medicine (TCM). Methods: The M. D. Anderson Symptom Assessment Inventory (MDASI) was used with 10 more TCM items added. Questions regarding TCM application requested in cancer care were also asked. A multi-center, cross-sectional study was conducted in 340 patients from 4 hospitals in Beijing and Dalian. SPSS and Excel software were adopted for statistical analysis. The questionnaire was self-evaluated with the Cronbach's alpha score. Results: The most common symptoms were fatigue 89.4%, sleep disturbance 74.4%, dry mouth 72.9%, poor appetite 72.9%, and difficulty remembering 71.2%. These symptoms affected work (89.8%), mood (82.6%),and activity (76.8%), resulting in poor quality of life. Eighty percent of the patients wanted to regulate the body with TCM. Almost 100% of the patients were interested in acquiring knowledge regarding the integrated traditional Chinese medicine (TCM) and Western medicine (WM) in the treatment and rehabilitation of cancer. Cronbach's alpha score indicated that there was acceptable internal consistency within both the MDASI and TCM items, 0.86 for MDASI, 0.78 for TCM, and 0.90 for MDASI-TCM (23 items). Conclusions: Fatigue, sleep disturbance, dry mouth, poor appetite, and difficulty remembering are the most common symptoms in cancer patients. These greatly affect the quality of life for these patients. Patients expressed a strong desire for TCM holistic regulation. The MDASI and its TCM-adapted model could be a critical tool for the quantitative study of TCM symptoms.

  10. The contribution of forensic science to crime analysis and investigation: forensic intelligence.

    Science.gov (United States)

    Ribaux, Olivier; Walsh, Simon J; Margot, Pierre

    2006-01-27

    The debate in forensic science concentrates on issues such as standardisation, accreditation and de-contextualisation, in a legal and economical context, in order to ensure the scientific objectivity and efficiency that must guide the process of collecting, analysing, interpreting and reporting forensic evidence. At the same time, it is recognised that forensic case data is still poorly integrated into the investigation and the crime analysis process, despite evidence of its great potential in various situations and studies. A change of attitude is needed in order to accept an extended role for forensic science that goes beyond the production of evidence for the court. To stimulate and guide this development, a long-term intensive modelling activity of the investigative and crime analysis process that crosses the boundaries of different disciplines has been initiated. A framework that fully integrates forensic case data shows through examples the capital accumulated that may be put to use systematically.

  11. Neutron activation analysis of human hair

    International Nuclear Information System (INIS)

    As a part of IAEA research project, ''Activation analysis of hair as an indicator of contamination of man by environmental trace element pollutants'', a survey was carried out to elucidate the levels of various trace element concentration in hair of local population in the Tokyo Metropolitan areas, by applying instrumental neutron activation analysis. A total of 202 scalp hair samples were collected from the inhabitants classified by sex and five age classes. Irradiation was made in the Rikkyo University 100 kW TRIGA MARK-II reactor. Using several combinations of irradiation time, cooling time and counting time, forty elements were determined. The relationship between several trace element contents in hair and such factors as sex, age class, hair treatment, smoking habit and dental treatment, was analyzed by using the method of multiple regression. It was shown that (1) Hair treatment had a predominant effect on the contents of bromine, magnesium and calcium in hair, (2) Aging and amoking contributed increasing mercury content in hair, and hair treatment acted reversely. (author)

  12. Research Activities involving Radioactivation Analysis in Korea

    International Nuclear Information System (INIS)

    When the Triga Mark-II Research Reactor was installed at this institute in 1960, it was furnished with a pneumatic tube, a fume hood, and a laboratory bench for the purpose of developing the utilization of the research reactor in this country. This marked the commencement of research activity in radioactivation analysis in Korea. Since the output of the reactor was not sufficient enough to perform any sophisticated fundamental research work in nuclear science, radioactivation analysis was considered as one of the most promising means of utilising the reactor. Various requests for routine analysis of the trace elements contained in Korean mineral ores, archaeological materials, domestic industrial samples, native medicinal plants, and criminological samples had been filed at this institute. Fortunately, a well trained scientist and technician for the radioactivation work had been working at this division and hence these requests from the public had been well worked out to receive much recognition of scientists and engineers both in this country and overseas. A brief summary of the research work accomplished is presented in this paper and a brief outline of the routine analytical work is also described on the basis of local situations

  13. Some Applications of Fast Neutron Activation Analysis of Oxygen

    Energy Technology Data Exchange (ETDEWEB)

    Owrang, Farshid

    2003-07-01

    illustrated how the activated water would propagate along that pipe. C) Combustion products. In order to investigate the oxidation in combustion products (deposits), the total amount of oxygen in the deposits collected from combustion chambers of a modern gasoline engine was measured, using cyclic fast neutron activation analysis (FNAA). As a compartment, the organic compounds containing oxygen were identified using {sup 13}C solid-state nuclear magnetic resonance (NMR) spectroscopy. The results of FNAA showed that the amount of oxygen in deposits varies depending on where the deposits have been formed. {sup 13}C NMR has showed that the carbon backbone of the deposits exists as highly oxidized poly aromatics and/or graphitic structure. D) On-line fast neutron activation analysis. On-line neutron activation analysis was used to detect the amount of oxygen in bulk liquids. The method was optimised for on-line detection of oxygen in rapeseed oil. The goal was to develop a non-intrusive method for measurement of the total amount of oxygen in oil during combustion/oxidation.

  14. An investigation and comparison on network performance analysis

    OpenAIRE

    2012-01-01

    This thesis is generally about network performance analysis. It contains two parts. The theory part summarizes what network performance is and inducts the methods of doing network performance analysis. To answer what network performance is, a study into what network services are is done. And based on the background research, there are two important network performance metrics: Network delay and Throughput should be included in network performance analysis. Among the methods of network a...

  15. Integrated Remote Sensing and Geophysical Investigations of the Geodynamic Activities at Lake Magadi, Southern Kenyan Rift

    Directory of Open Access Journals (Sweden)

    Akinola Adesuji Komolafe

    2012-01-01

    Full Text Available The tectonic lineaments and thermal structure of Lake Magadi, southern Kenyan rift system, were investigated using ASTER data and geophysical methods. Five N-S faults close to known hot springs were identified for geoelectric ground investigation. Aeromagnetic data were employed to further probe faults at greater depths and determine the Curie-point depth. Results indicate a funnel-shaped fluid-filled (mostly saline hydrothermal zone with relatively low resistivity values of less than 1 Ω-m, separated by resistive structures to the west and east, to a depth of 75 m along the resistivity profiles. There was evidence of saline hydrothermal fluid flow toward the surface through the fault splays. The observed faults extend from the surface to a depth of 7.5 km and are probably the ones that bound the graben laterally. They serve as major conduits for the upward heat flux in the study area. The aeromagnetics spectral analysis also revealed heat source emplacement at a depth of about 12 km. The relative shallowness implies a high geothermal gradient evidenced in the surface manifestations of hot springs along the lake margins. Correlation of the heat source with the hypocenters showed that the seismogenetic zone exists directly above the magmatic intrusion, forming the commencement of geodynamic activities.

  16. Contribution to the investigation of the p53 in vivo and in vitro trans-activation activity

    International Nuclear Information System (INIS)

    Among the body's defence mechanisms, the programmed cellular death or apoptosis is an important safeguard way which allows the body to get rid of the injured cells before they acquire steady genetic modifications leading to an anarchistic multiplication. As p53 tumor suppressor gene plays a predominant role within this process, this research report first presents the p53 protein, its structure, its activities as a transcription factor, its modifications and the implications on its functional activities, its biological activities, and describes the p53 intracellular rate regulation and the use of this protein in radiology, particularly in 'in vivo' investigations on irradiated mice. It also presents the p53 family. Then, the author reports experimental investigations on possible other genes which could be trans-activated by p53. A gene is identified as a new target gene. She also demonstrates a new p53 activation path induced by another member of the p53 family, the p73 alpha protein

  17. Investigation of the mechanisms by which UV irradiation activates the tyrosinase gene

    Energy Technology Data Exchange (ETDEWEB)

    Bao, Y

    2000-04-01

    Tyrosinase, tyrosinase related protein-1 (TRP-1) and tyrosinase related protein-2 (TRP-2) are the enzymes involved in melanin pigment synthesis. They are expressed specifically in melanocytic cells. UV irradiation is the major physiological stimulant of melanogenesis. Tyrosinase is the rate-limiting enzyme in melanin synthesis and its activity is regulated by UV irradiation in melanocytes. The molecular mechanism underlying the activation of tyrosinase by UV is still not clear. In this thesis, the effects of UV irradiation on tyrosinase, TRP-1 and TRP-2 gene expression in mouse B16 melanoma cells were studied as well as the effects of UV irradiation on the activity of the tyrosinase promoter in mouse, and human melanoma cells. UV irradiation caused an increase in tyrosinase mRNA level, without change in either TRP-1 or TRP-2 mRNA levels, as determined by Northern blot analysis. In order to determine whether UV- induced increase of tyrosinase mRNA expression involved modulation of tyrosinase promoter activity, transient transfection approaches involving a series of constructs containing either chloramphenicol acetyl transferase (CAT) or luciferase reporter genes linked to different lengths of the tyrosinase gene- promoter were used. UV irradiation specifically induced CAT gene expression from both the mouse and the human tyrosinase promoters, suggesting that UV irradiation induced the transcription of the tyrosinase gene. These observations indicated that the promoter region between -250 and -150 bp of the human tyrosinase promoter may contain important cis-regulatory elements involved in the UV response. To localise the cis-regulatory elements responsible for the UV response of the tyrosinase promoter, the 100-bp between -250 bp and -150 bp of the tyrosinase promoter was inserted upstream of a CAT reporter. It was shown that transcription from the 100-bp promoter fragment was activated by UV irradiation. Mutations of a potential cAMP response element (CRE) motif

  18. Aspects of precision and accuracy in neutron activation analysis

    International Nuclear Information System (INIS)

    Analytical results without systematic errors and with accurately known random errors are normally distributed around their true values. Such results may be produced by means of neutron activation analysis both with and without radiochemical separation. When all sources of random variation are known a priori, their effect may be combined with the Poisson statistics characteristic of the counting process, and the standard deviation of a single analytical result may be estimated. The various steps of a complete neutron activation analytical procedure are therefore studied in detail with respect to determining their contribution to the overall variability of the final result. Verification of the estimated standard deviation is carried out by demonstrating the absence of significant unknown random errors through analysing, in replicate, samples covering the range of concentrations and matrices anticipated in actual use. Agreement between the estimated and the observed variability of replicate results is then tested by a simple statistic T based on the chi-square distribution. It is found that results from neutron activation analysis on biological samples can be brought into statistical control. In routine application of methods in statistical control the same statistical test may be used for quality control when some of the actual samples are analysed in duplicate. This analysis of precision serves to detect unknown or unexpected sources of variation of the analytical results, and both random and systematic errors have been discovered in practical trace element investigations in different areas of research. Particularly, at the ultratrace level of concentration where there are few or no standard reference materials for ascertaining the accuracy of results, the proposed quality control based on the analysis of precision combined with neutron activation analysis with radiochemical separation, with an a priori precision independent of the level of concentration, becomes a

  19. Investigation of Antibacterial Activity of Ethanolic and Methanolic Extracts of Mentha pulegium L.

    Directory of Open Access Journals (Sweden)

    Hossein Motamedi

    2014-10-01

    Full Text Available Background: With regard to the rapid emerging antibiotic resistance bacteria, plants as one of the most common natural sources of antimicrobial agents can be used as alternative for treatment of infectious diseases. This study was designed to investigate antibacterial activity of Mentha pulegium L. (Lamiaceae family. Materials and Methods: In this experimental study, the antibacterial effect of 4, 8, 16 and 24 mg/disc of alcoholic extracts were assessed using standard disc diffusion method. Minimum inhibitory concentration (MIC and minimum bactericidal concentration (MBC were also determined. Furthermore, the structural changes following to the exposure with these extracts were also investigated in test bacteria. Results: Both extracts of this plant showed considerable antibacterial activity against some Gram positive (Bacillus cereus and Staphylococcus aureus and also Gram negative (Escherichia coli, Pseudomonas aeruginosa and Proteus mirabilis bacteria. All of the tested bacteria were resistant to nafcillin. The maximum effects was observed in the case of both ethanolic and methanolic extracts in all concentrations on P. mirabilis (25 mm and the lowest effect was on P. aeruginosa. MIC and MBC values of both extracts against S. aureus were equal (MIC=MBC=8 mg/mL and P. mirabilis were MIC=4 mg/mL and MBC=8 mg/mL. The SEM analysis revealed deformation and cell wall disruption of affected bacteria. Conclusion: Based on these results it can be suggested that M. pulegium L. is an effective antibacterial plant that can be used as a new source for antibiotic discovery against bacterial pathogens especially food poisoning pathogens such as S. aureus, B. cereus and also for treatment of P. mirabilis infection.

  20. Adult active transport in the Netherlands: an analysis of its contribution to physical activity requirements.

    Directory of Open Access Journals (Sweden)

    Elliot Fishman

    Full Text Available Modern, urban lifestyles have engineered physical activity out of everyday life and this presents a major threat to human health. The Netherlands is a world leader in active travel, particularly cycling, but little research has sought to quantify the cumulative amount of physical activity through everyday walking and cycling.Using data collected as part of the Dutch National Travel Survey (2010 - 2012, this paper determines the degree to which Dutch walking and cycling contributes to meeting minimum level of physical activity of 150 minutes of moderate intensity aerobic activity throughout the week. The sample includes 74,465 individuals who recorded at least some travel on the day surveyed. As physical activity benefits are cumulative, all walking and cycling trips are analysed, including those to and from public transport. These trips are then converted into an established measure of physical activity intensity, known as metabolic equivalents of tasks. Multivariate Tobit regression models were performed on a range of socio-demographic, transport resources, urban form and meteorological characteristics.The results reveal that Dutch men and women participate in 24 and 28 minutes of daily physical activity through walking and cycling, which is 41% and 55% more than the minimum recommended level. It should be noted however that some 57% of the entire sample failed to record any walking or cycling, and an investigation of this particular group serves as an important topic of future research. Active transport was positively related with age, income, bicycle ownership, urban density and air temperature. Car ownership had a strong negative relationship with physically active travel.The results of this analysis demonstrate the significance of active transport to counter the emerging issue of sedentary lifestyle disease. The Dutch experience provides other countries with a highly relevant case study in the creation of environments and cultures that

  1. Analysis of physical activities in Taekwondo Pumsae.

    Science.gov (United States)

    Lee, Sang-Bock; Cha, Eun-Jong; Lee, Tae-Soo

    2008-01-01

    Exercise is very important element for successful aging. Among many sports events, Korea is the suzerain of Taekwondo. When competing (Taekwondo Free Fighting) after learning Poomse as basic movements and inuring them, people compete with movements depending on situation. Among Poomses of Taekwondo, Taegeuk Poomse consists of very basic movements from 1 Jang to 8 Jang and they are for inuring to body. In order to prescribe Taegeuk Jang, which is the basic movement of Taekwondo that Korea is the suzerain, as an exercise for successful aging, it is necessary to analyze physical activity level of each Taegeuk Jang (From 1 Jang through 8 Jang) and suggest the same. Therefore, in this study, I analyzed physical activity level of each Jang of Taegeuk Poomse by attaching Armband made by Body Media Company on brachia and legs below knee of Taekwondo trainees. The result of the analysis of the whole momentum from Taegeuk 1 Jang to 8 Jang is as follows: First, the average absolute value of acceleration variation of vertical direction signal (L-MAD): 5.15. Second, the average absolute value of acceleration variation of horizontal direction signal (T-MAD): 3.44. Finally, the average of calorie consumption per minute (AEE/Min): 5.06 Cal. The obtained result corresponds to proper exercise condition for successful aging and it can be utilized as data for exercise prescription for the young and the old.

  2. Investigative Psychology: Offender Profiling and the Analysis of Criminal Action

    OpenAIRE

    Canter, David V.; Youngs, Donna E.

    2009-01-01

    For many years Offender Profiling has caught the popular imagination, being drawn on by law enforcement throughout the world. But until the development of Investigative Psychology ‘profiling’ was based on little more than the informed personal expertise of experienced detectives. Spearheaded by David Canter and his associates throughout the world the new discipline of Investigative Psychology has emerged out of a quarter century of research and involvement in many actual cases. This gro...

  3. Neutron activation analysis of hair from breast cancer patients

    International Nuclear Information System (INIS)

    Hair samples from breast cancer patients were collected at the same time as tumour and normal tissues obtained during mastectomy, in order to determine elemental concentrations and investigate whether hair can act as an epidemiological monitor of the disease. Instrumental neutron activation analysis was used and concentrations for Na, Mg, S, Cl, Ca, Mn, Cu, Zn, Br, I, Sb, Ba, Au and Hg in the hair samples measured. No strong correlations were found between the concentrations of Cl, Cu, Zn and Br in hair and those in tumour tissues and in normal tissues. The level of Zn in the patients hair is low and that of Ca very high

  4. Solar active regions: a nonparametric statistical analysis

    CERN Document Server

    Pelt, J; Tuominen, I

    2009-01-01

    The sunspots and other solar activity indicators tend to cluster on the surface of the Sun.These clusters very often occur at certain longitudes that persist in time.It is of general interest to find new and simple ways to characterize the observed distributions of different indicators and their behaviour in time. In the present work we use Greenwich sunspot data to evaluate statistical but not totally coherent stability of sunspot distribution along latitudes as well as longitudes. The aim was to obtain information on the longitudinal distribution of the underlying spot-generating mechanism rather than on the distribution and migration of sunspots or sunspot groups on the solar surface. Therefore only sunspot groups were included in the analysis, and only the time of their first appearance was used. We use simple nonparametric approach to reveal sunspot migration patterns and their persistency. Our analysis shows that regions where spots are generated tend to rotate differentially as the spots and spot group...

  5. Applications of neutron activation analysis technique

    International Nuclear Information System (INIS)

    The technique was developed as far back as 1936 by G. Hevesy and H. Levy for the analysis of Dy using an isotopic source. Approximately 40 elements can be analyzed by instrumental neutron activation analysis (INNA) technique with neutrons from a nuclear reactor. By applying radiochemical separation, the number of elements that can be analysed may be increased to almost 70. Compared with other analytical methods used in environmental and industrial research, NAA has some unique features. These are multi-element capability, rapidity, reproducibility of results, complementarity to other methods, freedom from analytical blank and independency of chemical state of elements. There are several types of neutron sources namely: nuclear reactors, accelerator-based and radioisotope-based sources, but nuclear reactors with high fluxes of neutrons from the fission of 235U give the most intense irradiation, and hence the highest available sensitivities for NAA. In this paper, the applications of NAA of socio-economic importance are discussed. The benefits of using NAA and related nuclear techniques for on-line applications in industrial process control are highlighted. A brief description of the NAA set-ups at CERT is enumerated. Finally, NAA is compared with other leading analytical techniques

  6. Analysis of field investigative interviews of children conducted by specially trained police investigators

    OpenAIRE

    Myklebust, Trond

    2009-01-01

    The research of field investigative interviews of children (FIIC) are mainly studiesof individual factors by the children and interviewers, largely driven by a concern for non-contamination of the childrens` memory of the alleged offence in the interaction between the child and the interviewer. During the course of the present research, 100 videotaped FIIC, conducted by special trained interviewers, have been analysed and include some of the most prominent variables that are considered vital ...

  7. USE OF 137CS ACTIVITY TO INVESTIGATE SEDIMENT MOVEMENT AND TRANSPORT MODELING IN RIVER COASTAL ENVIRONMENT

    Directory of Open Access Journals (Sweden)

    M. E. Toriman

    2012-01-01

    Full Text Available Conflicts between human and environment always triggered to sedimentation and erosion problems within the coastal areas, Therefore understanding sediment transport processes in a river estuary and coastal waters was important when studying sediment transport and mobility within the river coastal environment. This article aims to investigate the sediment transport and mobility of the Kemaman River estuary, Terengganu Malaysia. In this article, it was demonstrated that anthropogenic activities within a watershed, such as agriculture and urbanization affected the sediment yield from the watershed. Over four months observation (November 2008-February 2009, the delivery of suspended sediment from the Kemaman River to the Kemaman Estuary had increased by about 25%. Based on the in-situ measurement of 137Cs activity, the measure activity ranged between 5638-22421 cpm for backshore while for foreshore was between 2655-13354 cpm. The mean values for backshore and foreshore were 15153 and 6261 cpm respectively with suspended sediment concentration, recorded from 17 November to 10 February was between 110.5-218.8 mg L-1. Using flow and suspended sediment discharge data provided by the Drainage and Irrigation Department (DID revealed were possible increasing trend in suspended sediment discharge and concentration, particularly during the monsoon season. Temporal analysis indicates that the trend of sediment yield was increased during the monsoon season resulting over sediment supply adjacent to the river mouth and causing difficulty for fisherman to navigate the boats. In a broader context, this study can underscores the need to address the anthropogenic impacts and flood monsoon on sediment yield in the Kemaman-Chendor estuary system.

  8. Activation analysis in Europe: present and future perspectives

    International Nuclear Information System (INIS)

    A survey is given of the present-day European contribution to activation analysis, covering neutron activation analysis (NAA), charged particle activation analysis (CPAA) and photon activation analysis (PAA). Attention is paid to the available irradiation facilities, in particular nuclear reactors, cyclotrons and Van de Graaff accelerators, and linear electron accelerators. Mention is made of progress in fundamental fields, but the attention is especially focussed on practical applications: environmental, geochemical/cosmochemical, biological/medical, and high-purity materials. Eventually, the role of activation analysis in research projects of the Commission of the European Communities (CEC) and in the Reference Materials program of the Community Bureau of Reference (BCR) is emphasized

  9. Operating cost analysis of anaesthesia: Activity based costing (ABC analysis

    Directory of Open Access Journals (Sweden)

    Majstorović Branislava M.

    2011-01-01

    Full Text Available Introduction. Cost of anaesthesiology represent defined measures to determine a precise profile of expenditure estimation of surgical treatment, which is important regarding planning of healthcare activities, prices and budget. Objective. In order to determine the actual value of anaestesiological services, we started with the analysis of activity based costing (ABC analysis. Methods. Retrospectively, in 2005 and 2006, we estimated the direct costs of anestesiological services (salaries, drugs, supplying materials and other: analyses and equipment. of the Institute of Anaesthesia and Resuscitation of the Clinical Centre of Serbia. The group included all anesthetized patients of both sexes and all ages. We compared direct costs with direct expenditure, “each cost object (service or unit” of the Republican Health-care Insurance. The Summary data of the Departments of Anaesthesia documented in the database of the Clinical Centre of Serbia. Numerical data were utilized and the numerical data were estimated and analyzed by computer programs Microsoft Office Excel 2003 and SPSS for Windows. We compared using the linear model of direct costs and unit costs of anaesthesiological services from the Costs List of the Republican Health-care Insurance. Results. Direct costs showed 40% of costs were spent on salaries, (32% on drugs and supplies, and 28% on other costs, such as analyses and equipment. The correlation of the direct costs of anaestesiological services showed a linear correlation with the unit costs of the Republican Healthcare Insurance. Conclusion. During surgery, costs of anaesthesia would increase by 10% the surgical treatment cost of patients. Regarding the actual costs of drugs and supplies, we do not see any possibility of costs reduction. Fixed elements of direct costs provide the possibility of rationalization of resources in anaesthesia.

  10. Investigating the cultural patterns of corruption: A nonparametric analysis

    OpenAIRE

    Halkos, George; Tzeremes, Nickolaos

    2011-01-01

    By using a sample of 77 countries our analysis applies several nonparametric techniques in order to reveal the link between national culture and corruption. Based on Hofstede’s cultural dimensions and the corruption perception index, the results reveal that countries with higher levels of corruption tend to have higher power distance and collectivism values in their society.

  11. Signal analysis of three-dimensional nystagmus for otoneurological investigations.

    Science.gov (United States)

    Juhola, Martti; Aalto, Heikki; Jutila, Topi; Hirvonen, Timo P

    2011-03-01

    Three-dimensional signal analysis can be applied to eye movements called nystagmus in order to study otoneurological patients suffering from vertigo and other balance problems. We developed an analysis and modeling algorithm for three-dimensional nystagmus measured by a video-oculography system. We were also interested in verifying an otoneurological hands-on convention called Ewald's first law in a strict physiological sense in vestibular patients. We recorded nystagmus from 42 patients all suffering from vertigo or dizziness. The underlying pathology was unilateral in 39 patients, bilateral in one patient, and central in two patients. Video-oculography was used to record three-dimensional nystagmus to separately produce horizontal, vertical, and torsional signals for each eye. On the basis of signal analysis techniques and straightforward vector calculus, we were able to recognize slow phases of nystagmus to compute their angular velocities to estimate from which part of the inner ear the disorder originated. We found that for all 42 patients the plane of one of the two horizontal semicircular canals was the closest. We were able to quantitatively estimate the influence of different semicircular canals, and, despite the pathology, horizontal canals seemed to be predominant in driving the nystagmus. The signal analysis and modeling algorithm developed is effective in studying otoneurological problems registered with nystagmus and opens new insights in three-dimensional nystagmography. Our results strongly support Ewald's first law. PMID:21107695

  12. Analysis of human enamel and dentine by neutron activation analysis

    International Nuclear Information System (INIS)

    Determination of trace elements in dental tissues has been of great interest to study the correlation between element composition and caries as well as food habits of individuals. In the present study dentine and enamel samples from healthy individuals were analysed by neutron activation analysis. The teeth were provided form dental clinics, and they were previously washed using purified water and acetone. Then they were dried at 40 deg C and ground in a agate mortar. The samples and element standards were irradiated with thermal neutrons at the IEA-R1 nuclear reactor. Long irradiations of 8 h under thermal neutron flux of 5x1012 n cm-2 s-1 were used for Ca, Na, Sr and Zn determinations. In short irradiations of 15 s and under neutron flux of 1012 n cm-2 s-1 the elements Mg, Mn, Na e Sr were determined. The induced gamma activities of the samples and standards were measured using a hyperpure Ge detector coupled to a gamma ray spectrometer. Elemental concentrations were calculated by comparative method. Results obtained showed that Ca, Mg and Na are present in both tissues at the level of percentages and the elements Mn, Sr and Zn at the μg g-1 levels. For quality control of the results the certified reference materials NIST 1400 Bone Ash and NIST 1486 Bone Meal were analysed. (author)

  13. Active Desiccant-Based Preconditioning Market Analysis and Product Development

    Energy Technology Data Exchange (ETDEWEB)

    Fischer, J.

    2001-01-11

    The Phase 1 report (ORNL/Sub/94-SVO44/1), completed earlier in this program, involved a comprehensive field survey and market analysis comparing various specialized outdoor air handling units. This initial investigation included conventional cooling and reheat, conventional cooling with sensible recovery, total energy recovery systems (passive desiccant technology) and various active desiccant systems. The report concluded that several markets do promise a significant sales opportunity for a Climate Changer-based active desiccant system offering. (Climate Changer is a registered trademark of Trane Company.) This initial market analysis defined the wants and needs of the end customers (design engineers and building owners), which, along with subsequent information included in this report, have been used to guide the determination of the most promising active desiccant system configurations. This Phase 2 report begins with a summary of a more thorough investigation of those specific markets identified as most promising for active desiccant systems. Table 1 estimates the annual sales potential for a cost-effective product line of active desiccant systems, such as that built from Climate Changer modules. The Product Development Strategy section describes the active desiccant system configurations chosen to best fit the needs of the marketplace while minimizing system options. Key design objectives based on market research are listed in this report for these active desiccant systems. Corresponding performance goals for the dehumidification wheel required to meet the overall system design objectives are also defined. The Performance Modeling section describes the strategy used by SEMCO to design the dehumidification wheels integrated into the prototype systems currently being tested as part of the U.S. Department of Energy's Advanced Desiccant Technology Program. Actual performance data from wheel testing was used to revise the system performance and energy analysis

  14. Neutron activation analysis for monitoring northern terrestrial ecosystems

    International Nuclear Information System (INIS)

    New experimental data have been obtained on heavy metal and rare-earth element concentrations in environmental objects, namely pine needles and soils, caused by atmospheric pollution in different regions of the Kola Peninsula. The investigation was performed with the use of epithermal neutron activation analysis at the IBR-2 fast pulsed reactor. The analysis of nearly 40 element distributions in pine needles and soils from the studied geographical points testifies of a strong contamination source - the nickel smelting complex in Monchegorsk. The contamination levels for Ni, Co, Cr, Se, and others are also high and may be hazardous for this region population because some of these elements are carcinogenic. 6 refs., 1 fig., 2 tabs

  15. Ancestry Analysis in the 11-M Madrid Bomb Attack Investigation

    OpenAIRE

    Christopher Phillips; Lourdes Prieto; Manuel Fondevila; Antonio Salas; Antonio Gómez-Tato; José Alvarez-Dios; Antonio Alonso; Alejandro Blanco-Verea; María Brión; Marta Montesino; Angel Carracedo; María Victoria Lareu

    2009-01-01

    The 11-M Madrid commuter train bombings of 2004 constituted the second biggest terrorist attack to occur in Europe after Lockerbie, while the subsequent investigation became the most complex and wide-ranging forensic case in Spain. Standard short tandem repeat (STR) profiling of 600 exhibits left certain key incriminatory samples unmatched to any of the apprehended suspects. A judicial order to perform analyses of unmatched samples to differentiate European and North African ancestry became a...

  16. Implementation of a timeline analysis software for digital forensic investigations

    OpenAIRE

    Nisén, Patrik

    2013-01-01

    Organizations today are trying to manage the many risks they percieve to be threatening the security of their valuable information assets, but often these risks realize into security incidents. Managing risks proactively is important, but equally important and challenging is to efficiently respond to the incidents that have already occurred, to minimize their impact on business processes. A part of managing security incidents is the technical analysis of any related computer systems, also ...

  17. Factor Analysis: Investigating Important Aspects for Agile Adoption in Malaysia

    OpenAIRE

    Asnawi, Ani Liza; Gravell, Andrew; Wills, Gary

    2012-01-01

    This paper focuses on identifying the important aspects of Agile adoption from software practitioners in Malaysia. We analyse 27 Agile adoption variables from a survey of early Agile users in Malaysia. Factor analysis is conducted to identify the clusters of the variables (or items) and how they are inter-related to produce factors. Most of the respondents are from software organisations in Kuala Lumpur and Selangor; in which most of the companies are located in Malaysia. The clusters of vari...

  18. Extending methods: using Bourdieu's field analysis to further investigate taste

    Science.gov (United States)

    Schindel Dimick, Alexandra

    2015-06-01

    In this commentary on Per Anderhag, Per-Olof Wickman and Karim Hamza's article Signs of taste for science, I consider how their study is situated within the concern for the role of science education in the social and cultural production of inequality. Their article provides a finely detailed methodology for analyzing the constitution of taste within science education classrooms. Nevertheless, because the authors' socially situated methodology draws upon Bourdieu's theories, it seems equally important to extend these methods to consider how and why students make particular distinctions within a relational context—a key aspect of Bourdieu's theory of cultural production. By situating the constitution of taste within Bourdieu's field analysis, researchers can explore the ways in which students' tastes and social positionings are established and transformed through time, space, place, and their ability to navigate the field. I describe the process of field analysis in relation to the authors' paper and suggest that combining the authors' methods with a field analysis can provide a strong methodological and analytical framework in which theory and methods combine to create a detailed understanding of students' interest in relation to their context.

  19. Activation analysis for the Ignitor tokamak

    International Nuclear Information System (INIS)

    The purpose of the Ignitor experiment is to produce DT plasma regimes where ignition can take place. From the neutronics point of view, after a first period of machine set up and tuning in aneutronic operation, a second phase of 2.5 MeV neutron production with pure deuterium plasmas at increasing density is anticipated. After that, a transition phase to increasing percentage of tritium will be followed by several years of operations with 50% of tritium leading to short but intense 14-MeV neutron emission. To deal with the concerns due to the strong neutron emission, a detailed description of the actual Ignitor machine is implemented in the MCNP-4B Monte Carlo code to calculate the neutron fluxes in all machine components, taking in account the streaming through the ports. These fluxes are then used as input for the FISPACT-97 code for the analysis of the activation at the end of life and at intermediate times for safety assessment purposes. The resulting dose rate outside the device is also studied. The results point out that remote handling is needed for repair/maintenance of inner components following the DD operations, and that the access in the hall near the device could be restricted from the beginning of DT operations. The requirements on additional shield are discussed

  20. Structural investigations of calcium binding and its role in activity and activation of outer membrane phospholipase A from Escherichia coli

    NARCIS (Netherlands)

    Snijder, H.J.; Kingma, R.L.; Kalk, K.H.; Egmond, M.R.; Dijkstra, B.W.

    2001-01-01

    Outer membrane phospholipase A (OMPLA) is an integral membrane enzyme that catalyses the hydrolysis of phospholipids. Enzymatic activity is regulated by reversible dimerisation and calcium-binding. We have investigated the role of calcium by X-ray crystallography. In monomeric OMPLA, one calcium ion

  1. Investigation and Analysis of the Actuality of Female College Students’ Extracurricular Athletics since the Sunshine Sports Was Developed

    OpenAIRE

    Xuxia Yao; Qiang Zhao

    2010-01-01

    In the process that China actively pushes the sunshine sports, the research of the development of college students’ extracurricular athletics is very important to respond the national call and actively enhance college students’ physical quality. By the investigation, analysis, and research about the female college students’ cognition degree of “sunshine sports”, intention of participating in the extracurricular athletics, cognition of extracurricular athletics, liking items, exercise times, e...

  2. Development of Distinction Method of Production Area of Ginsengs by Using a Neutron Activation Analysis

    Energy Technology Data Exchange (ETDEWEB)

    Kim, Young Jin; Chung, Yong Sam; Sun, Gwang Min; Lee, Yu Na; Yoo, Sang Ho [KAERI, Daejeon (Korea, Republic of)

    2010-05-15

    Distinction of production area of Korean ginsengs has been tried by using neutron activation techniques such as an instrumental neutron activation analysis (INAA) and a prompt gamma activation analysis (PGAA). A distribution of elements has varied according to the part of plant clue to the difference of enrichment effect and influence from a soil where the plants have been grown. So correlation study between plants and soil has been an Issue. In this study, the distribution of trace elements within a Korean ginseng was investigated by using an instrumental neutron activation analysis

  3. Investigation on the binding activities of citalopram with human and bovine serum albumins

    Energy Technology Data Exchange (ETDEWEB)

    Lin, Jingjing; Liu, Yan, E-mail: liuyan@fjirsm.ac.cn; Chen, Mingmao; Huang, Huayin; Song, Ling, E-mail: songling@fjirsm.ac.cn

    2014-02-15

    The binding interactions of citalopram (CIT), an efficient antidepressant, with human serum albumin (HSA) and bovine serum albumin (BSA) were investigated by a series of spectroscopic methods including fluorescence, UV–vis absorption, circular dichroism (CD) and {sup 1}H nuclear magnetic resonance ({sup 1}H NMR). The fluorescence quenching and UV–vis absorption studies reveal that CIT could form complexes with both HSA and BSA. The CIT–BSA complex exhibits higher binding affinity than CIT–HSA complex. The thermodynamic study further suggests that the interactions between CIT and SAs are mainly driven by hydrophobic forces and hydrogen bonds. The {sup 1}H NMR analysis indicates that the participation of different functional groups of CIT is unequal in the complexation of CIT–HSA and CIT–BSA. Site marker competitive experiments show that the interactions between CIT and SAs primarily locate at sub-domain II A (site I). The effects of CIT on the conformation of SAs are further analyzed via synchronous fluorescence, three-dimensional fluorescence and CD spectra techniques. The results prove that the presence of CIT decreases the α-helical content of both SAs and induces the slight unfolding of the polypeptides of protein. Additionally, the conformational change of BSA induced by CIT is larger than that of HSA. -- Highlights: • The difference of binding activity between CIT–BSA and CIT–HSA is first reported. • Use spectroscopic, thermodynamic, and NMR methods. • CIT exhibits higher binding affinity to BSA than to HSA. • The binding forces between CIT and SA have been investigated. • The complexation of CIT–SA induces the conformational change of SA.

  4. Hi-C Observations of an Active Region Corona, and Investigation of the Underlying Magnetic Structure

    Science.gov (United States)

    Tiwari, S. K.; Alexander, C. E.; Winebarger, A.; Moore, R. L.

    2014-01-01

    The solar corona is much hotter (>=10(exp 6) K) than its surface (approx 6000 K), puzzling astrophysicists for several decades. Active region (AR) corona is again hotter than the quiet Sun (QS) corona by a factor of 4-10. The most widely accepted mechanism that could heat the active region corona is the energy release by current dissipation via reconnection of braided magnetic field structure, first proposed by E. N. Parker three decades ago. The first observational evidence for this mechanism has only recently been presented by Cirtain et al. by using High-resolution Coronal Imager (Hi-C) observations of an AR corona at a spatial resolution of 0.2 arcsec, which is required to resolve the coronal loops, and was not available before the rocket flight of Hi-C in July 2012. The Hi-C project is led by NASA/MSFC. In the case of the QS, work done by convection/granulation on the inter-granular feet of the coronal field lines translates into the heat observed in the corona. In the case of the AR, as here, there could be flux emergence, cancellation/submergence, or shear flows generating large stress and tension in coronal field loops which is released as heat in the corona. We are currently investigating the changes taking place in photospheric feet of the magnetic field involved with brightenings in the Hi-C AR corona. For this purpose, we are also using SDO/AIA data of +/- 2 hours around the 5 minutes Hi-C flight. In the present talk, I will first summarize some of the results of the Hi-C observations and then present some results from our recent analysis on what photospheric processes feed the magnetic energy that dissipates into heat in coronal loops.

  5. Dynamic analysis of a motorbike engine timing system: Experimental and numerical investigation of the geartrain

    Science.gov (United States)

    Rivola, Alessandro; Troncossi, Marco

    2014-10-01

    The development of high-performance vehicle engines requires advanced investigations in order to provide engineers with proper analysis tools to optimize the system design. The elastodynamic behaviour of the engine powertrain may be critical at high velocities (when the flexibility of the system components can have a major role on the overall performance) with consequences on the valve timing and the transmission of dynamic loads. A thorough numerical/experimental investigation was performed on the timing system of a racing motorbike engine. The timing system included the geartrain, which transmits power from the crankshaft to the camshafts, and the valve train, formed by the camshafts and the cam-follower mechanisms for the valve actuation. An experimental campaign was designed and carried out with the purpose of inspecting the timing system behaviour for different velocities and different design parameters. A numerical model was developed in order to provide a simulation/analysis tool that permits the design optimization of the main system components. The present work focuses on the geartrain elastodynamic analysis, which is the main novelty of a long-lasting activity carried out by the authors in collaborations with Ducati Motor Holding S.p.a. (Bologna, Italy). The experimental campaign, the model development and validation, and some simulation results are reported and discussed.

  6. Investigating Binary Black Hole Mergers with Principal Component Analysis

    CERN Document Server

    Clark, James; Healy, James; Heng, Ik Siong; Logue, Josh; Mangini, Nicholas; London, Lionel; Pekowsky, Larne; Shoemaker, Deirdre

    2014-01-01

    Despite recent progress in numerical simulations of the coalescence of binary black hole systems, highly asymmetric spinning systems and the construction of accurate physical templates remain challenging and computationally expensive. We explore the feasibility of a prompt and robust test of whether the signals exhibit evidence for generic features that can educate new simulations. We form catalogs of numerical relativity waveforms with distinct physical effects and compute the relative probability that a gravitational wave signal belongs to each catalog. We introduce an algorithm designed to perform this task for coalescence signals using principal component analysis of waveform catalogs and Bayesian model selection and demonstrate its effectiveness.

  7. Investigating primary marine aerosol properties: CCN activity of sea salt and mixed particles

    Science.gov (United States)

    King, S. M.; Butcher, A. C.; Rosenoern, T.; Coz, E.; Lieke, K. I.; de Leeuw, G.; Nilsson, E. D.; Bilde, M.

    2012-04-01

    Sea salt particles ejected as a result of bubbles bursting from artificial seawater in a closed stainless steel tank were sampled for size distribution, morphology, and cloud condensation nucleus (CCN) activity. The two-component artificial seawater consisted of salt, either NaCl or sea salt, and one organic compound in deionized water. Several organic molecules representative of oceanic organic matter were investigated. Bubbles were generated either by aeration through a porous diffuser or by water jet impingement on the surface of the artificial seawater. The effect of bubble lifetime, which was controlled by varying the depth of the diffuser in the water column, on particle size and CCN activity was investigated and was found to be insignificant for the organic compounds studied. The CCN activities of particles produced from diffuser-generated bubbles were generally governed by the high hygroscopicity of salt, such that activation was indistinguishable from that of salt, except in the case of very low mass ratio of salt to organic matter in the seawater solution. There was, however, a considerable decrease in CCN activity for particles produced from jet impingement on seawater that had a salinity of 10‰ and contained 0.45 mM of sodium laurate, an organic surfactant. The production of a thick foam layer from impingement may explain the difference in activation and supports hypotheses that particle production from the two methods of generating bubbles is not similar. Accurate conclusions from observed CCN activities of particles from artificial seawater containing organic matter require knowledge of the CCN activity of the inorganic component, especially as a small amount of the inorganic can heavily influence activation. Therefore, the CCN activity of both artificial sea salt and NaCl were measured and compared. Part of the discrepancy observed between the CCN activities of the two salts may be due to morphological differences, which were investigated using

  8. Incidence investigation and analysis of hepatic stress injury after trauma

    Institute of Scientific and Technical Information of China (English)

    WANG Quanchu; ZHANG Yafei; CHENG Zhengxiang

    2012-01-01

    Objective To investigate the etiology and pathogenesis of hepatic stress injury after trauma.Methods 4677 patients with severe trauma in 153th Hospital of PLA from Jan.2004 to Jul.2005 were enrolled in this study to investigate the incidence of hepatic stress injury,and furthermore,in combination with medical information,the possible pathogenesis was analyzed.Results The main manifestation of hepatic stress injury was the elevated ALT or AST levels (387 cases,8.3% ).The incidence of hepatic stress injury after hand injury,burn injury,head injury,bone injury,abdominal injury,and thoracic injury were 16.6%,6.9%,5.6%,5.0%,3.8% and 2.0%,respectively,and among which,the incidence of hepatic stress injury after hand injury was statistically highest (P <0.01 ).Conclusion The total incidence of hepatic stress injury after trauma was 8.3%.Intestinal endotoxemia might be one of the beginning components of hepatic stress injury after trauma.

  9. Instrumental neutron activation analysis of sectioned hair strands for arsenic

    Energy Technology Data Exchange (ETDEWEB)

    Guinn, V.P. [Univ. of Maryland, College Park, MD (United States)

    1996-12-31

    Instrumental neutron activation analysis (INAA) is a valuable and proven method for the quantitative analysis of sectioned human head hair specimens for arsenic - and, if arsenic is found to be present at high concentrations, the approximate times when it was ingested. Reactor-flux thermal-neutron activation of the hair samples produces 26.3-h {sup 76}As, which is then detected by germanium gamma-ray spectrometry, measuring the 559.1-keV gamma-ray peak of {sup 76}As. Even normal levels of arsenic in hair, in the range of <1 ppm up to a few parts per million of arsenic can be measured - and the far higher levels associated with large internal doses of arsenic, levels approaching or exceeding 100 ppm arsenic, are readily and accurately measurable. However, all phases of forensic investigations of possible chronic (or in some cases, acute) arsenic poisoning are important, i.e., not just the analysis phase. All of these phases are discussed in this paper, based on the author`s experience and the experience of others, in criminal cases. Cases of chronic arsenic poisoning often reveal a series of two to four doses, perhaps a few months apart, with increasing doses.

  10. Investigation of computer-aided colonic crypt pattern analysis

    Science.gov (United States)

    Qi, Xin; Pan, Yinsheng; Sivak, Michael V., Jr.; Olowe, Kayode; Rollins, Andrew M.

    2007-02-01

    Colorectal cancer is the second leading cause of cancer-related death in the United States. Approximately 50% of these deaths could be prevented by earlier detection through screening. Magnification chromoendoscopy is a technique which utilizes tissue stains applied to the gastrointestinal mucosa and high-magnification endoscopy to better visualize and characterize lesions. Prior studies have shown that shapes of colonic crypts change with disease and show characteristic patterns. Current methods for assessing colonic crypt patterns are somewhat subjective and not standardized. Computerized algorithms could be used to standardize colonic crypt pattern assessment. We have imaged resected colonic mucosa in vitro (N = 70) using methylene blue dye and a surgical microscope to approximately simulate in vivo imaging with magnification chromoendoscopy. We have developed a method of computerized processing to analyze the crypt patterns in the images. The quantitative image analysis consists of three steps. First, the crypts within the region of interest of colonic tissue are semi-automatically segmented using watershed morphological processing. Second, crypt size and shape parameters are extracted from the segmented crypts. Third, each sample is assigned to a category according to the Kudo criteria. The computerized classification is validated by comparison with human classification using the Kudo classification criteria. The computerized colonic crypt pattern analysis algorithm will enable a study of in vivo magnification chromoendoscopy of colonic crypt pattern correlated with risk of colorectal cancer. This study will assess the feasibility of screening and surveillance of the colon using magnification chromoendoscopy.

  11. [Radiobiological analysis of cancerogenic risk values in radioepidemiological investigations].

    Science.gov (United States)

    Rozhdestvenskiĭ, L M

    2008-01-01

    The aim of the present article consisted in critical analysis of the epidemiological approach to radiocancerogenic risk estimation in region of low level radiation (LLR). The estimation is making by means of mathematician models that ignore a principal difference in biological action of LLR and high level radiation (HLR). The main formal characteristic of LLR action is the presence of a plateau in beginning of a dose-effect curve of radiogenic risk. It may be argued by the following positions: repeating the plateau-phenomenon on various radiobiological effects, in different tests and bioobjects, first; a paradoxical trend of reciprocal ERR/Sv increasing regarding dose decreasing in region of plateau, second, and third, the increasing of the curvature in dose-effect curve beginning. The presence of a plateau is associated with the presence of a real radiogenic risk threshold. Besides, the analysis of processes influencing significantly the dynamics of initial radiation injury of biologically important macromolecules showed the preference in region of LLR those, decreasing/eliminating genome damages. There is follows from mentioned above a necessity to evaluate radiogenic risks in LLR region separately from HLR region. PMID:18825986

  12. Investigation of Bowen Basin coal mine fire gas analysis parameters

    Energy Technology Data Exchange (ETDEWEB)

    Cliff, D.; Bell, S.; O' Beirne, T. (ACIRL Ltd., North Ryde, NSW (Australia))

    1991-12-01

    Laboratory analysis of seven currently mined Bowen Basin coals has validated the use of carbon monoxide as the best indicator of the very early states of coal heating. As a primary warning indicator, other gases are rarely appropriate as they are emitted in such small quantities to make then very difficult to detect when diluted with typical mine ventilation quantities. Once a heating is suspected or confirmed, other gases and their various relationships can now be more confidently used to indicate peak temperatures and the progress of the heating. Interestingly, the order of evolution of many gases, from the Bowen Basin coals is quite different from overseas coals (as reported in the literature) and this impacts on the usefulness of many overseas generated interpretation techniques. All of the commonly used techniques for interpreting the status of a heating have been reviewed in the light of the research. These interpretative tools have very real limitations which have now been more clearly defined. The research has also demonstrated the need for accurate definitive mine gas analysis at the mine site. A fire ladder has been developed to enable the assessment of the heating coal temperature. The practical value of this research, as indicated above, needs to be concisely disseminated to industry. This should impact on the operation of mine environmental monitoring systems, and particularly on any software used to analyse gas results.

  13. [Investigation and analysis of China residents' environmental conservation desire].

    Science.gov (United States)

    Cao, Shi-Xiong; Chen, Jun; Chen, Li; Gao, Wang-Sheng; Yin, Hong-Wei

    2007-09-01

    From the viewpoints of country's safety and residents' desire, this paper investigated and analyzed the factors affecting China residents' attitudes on environmental protection policies, and the implementing results of these polices. It was indicated that people have an enhanced consciousness on environmental protection, and the relations between this consciousness and economic growth fit Kuznets curve, because most of the poor people are living in the suburban or remote regions with bad or seriously degraded environment, while the fast development of urbanization accelerates the deterioration of urban environment. People are more concerned about environment deterioration, and support the governments' policies of environmental conservation. The environment policy-making should put more emphasis on developing economics, strengthening education, and improving residents' livelihood.

  14. Investigating the recheck rules for urine analysis in children.

    Science.gov (United States)

    He, Y M; Yao, S W; Huang, Y J; Liang, B S; Liu, H Y

    2016-04-25

    The aim of this study was to establish recheck rules of urinalysis in children by investigating the concordance rate of the results obtained using the LabUMat urine dry chemistry analyzer (referred to as dry chemistry) and the UriSed tangible composition analyzer with that of the microscopic examination. First, 1040 urine samples from children (mean age 6.5 years) were analyzed using LabUMat and UriSed analyzers, and subsequently subjected to microscopic examination. The missed detection rate was evaluated and recheck rules were established to avoid missed diagnoses of abnormal renal function. Finally, clinical validations of the recheck rules were performed on 200 additional specimens. Among the samples used to investigate the recheck rules, the samples with positive microscopic examination results accounted for 58.65% of the total, while the samples with negative results accounted for 41.35%. Of the positive samples, a major portion (>50%) were RBC positive. The samples that were WBC positive and CAST positive accounted for 23.08 and 7.69%, respectively. The concordance rate was 87.5% and the missed detection rate was 2.9%. For the validation of the recheck rules in 200 urine samples, the concordance rate was 87.5% and the missed detection rate was 2.4%. When the detection of occult blood, WBC, and protein by dry chemistry, and the detection of RBC, WBC, and CAST by the UriSed analyzer are inconsistent, or the differences between them greater than 2 levels, recheck by microscopic examination is suggested.

  15. Investigating scientific literacy documents with linguistic network analysis

    DEFF Research Database (Denmark)

    Bruun, Jesper; Evans, Robert Harry; Dolin, Jens

    2009-01-01

    to obtain clear visual images of what is meant by SL expressed in written text. The raw text was first parsed into one statement sentences. Then, a linguistic type network was created with nodes being the words used in SL texts, and a link between two words established if they were adjacent to each other......International discussions of scientific literacy (SL) are extensive and numerous sizeable documents on SL exist. Thus, comparing different conceptions of SL is methodologically challenging. We developed an analytical tool which couples the theory of complex networks with text analysis in order...... in the one statement sentences. Using the program Pajek, we drew a map of the text showing the number of times a concept appeared in the one statement sentences, and the strength of links between words. Different SL texts was analysed in this way. The network description allowed for different calculations...

  16. EXPERIMENTAL INVESTIGATION & NUMERICAL ANALYSIS OF COMPOSITE LEAF SPRING

    Directory of Open Access Journals (Sweden)

    K. K. JADHAO,

    2011-06-01

    Full Text Available The Automobile Industry has shown keen interest for replacement of steel leaf spring with that of glass fiber composite leaf spring, since the composite material has high strength to weight ratio, good corrosion resistance and tailor-able properties. The objective of present study was to replace material for leaf spring. In present study the material selected was glass fiber reinforced plastic (GFRP and the polyester resin (NETPOL 1011 can be used which was more economical this will reduce total cost of composite leaf spring. A spring with constant width and thickness was fabricated by hand lay-up technique which was very simple and economical. The experiments were conducted on UTM and numerical analysis was done via (FEA using ANSYS software. Stresses and deflection results were verified for analytical and experimental results. Result shows that, the composite spring has stresses much lower than steel leaf spring and weight of composite spring was nearly reduced up to 85%.

  17. EMPIRICAL INVESTIGATION ON GLOBALIZATION AND SOCIAL POLARIZATION: CROSS COUNTRY ANALYSIS

    Directory of Open Access Journals (Sweden)

    Aylin Koç

    2013-01-01

    Full Text Available It is considered that the integration process of both developed and developing countries with the global world affects the aspect of social polarization in these countries. Two main approaches which are different from each other exist in the related literature about the effects of globalization on the social polarization. The first approach, which is mostly supported by neo-liberal economists, claims that the globalization influences the social polarization positively. The other approach suggests that the social polarization increases in the economies together with the globalization process. With this study which was prepared in this scope, the effect of globalization process on the social polarization was tried to be tested by cross-sectional analysis of the data of 2008 of twenty-seven EU member countries. As a result of the findings obtained in this study, it was concluded that the globalization process has a decreasing effect on the social polarization in these countries.

  18. Investigation and analysis of network psychology of college students

    Institute of Scientific and Technical Information of China (English)

    Zhang Xiaoyan

    2013-01-01

    Based on basic situational research and analysis carried out on 638 college students using network,we found that as many as 20 percent of the students are not only largely dependent on internet,but also addicted to it.Further biography characteristics analyses for different individuals on the four dimensions of the network forced addiction,tolerance,and time management and interpersonal relationship and health,show that there are significant differences in grades,gender with different education levels of their parents.Further researches on discrepancy that addicted groups have in network entertainment addiction,network information,cyber porn,network relations and network transactions addictions also illustrate that significant discrepancies exist in gender,net age,different discipline and other factors.Finally we put forward some correlative measures to solve the problems of college students network psychology from individuals,schools,and society levels.

  19. PRELIMINARY PHYTOCHEMICAL INVESTIGATION AND IN VITRO ANTIMICROBIAL ACTIVITY OF ETHANOLIC EXTRACT OF SONNERATIA APETALA PLANT

    Directory of Open Access Journals (Sweden)

    V. Prabhu Teja

    2013-06-01

    Full Text Available The aim of present study is to investigate the phytochemical constituents and antimicrobial activity of Ethanolic extract of Sonneratia apetala. Preliminary Phytochemical tests revealed the presence of alkaloids, flavonoids, tannins, saponins, phytosterols and carbohydrates. Antimicrobial activity was evaluated by Agar well Diffusion method. In vitro screening of Sonneratia apetala mangrove Ethanolic plant extract showed species specific activity in inhibiting growth of bacteria and fungi. The Ethanolic plant extract showed good activity against selected gram-positive bacteria (Bacillus subtilis, Staphylococcus aureus, Staphylococcus werneri, gram-negative bacteria (Pseudomonas putida, Escherichia coli, Pseudomonas aeruginosa, Proteus mirabilis, Klebsiella pneumonia and fungal strain (Candida albicans. The observations revealed significant zone of inhibition and supports to antimicrobial activity. The bioactive compounds responsible for these antimicrobial activities could be isolated and identified to develop a new drug of pharmaceutical interest.

  20. Investigation of thiol derivatized gold nanoparticle sensors for gas analysis

    Science.gov (United States)

    Stephens, Jared S.

    Analysis of volatile organic compounds (VOCs) in air and exhaled breath by sensor array is a very useful testing technique. It can provide non-invasive, fast, inexpensive testing for many diseases. Breath analysis has been very successful in identifying cancer and other diseases by using a chemiresistor sensor or array with gold nanoparticles to detect biomarkers. Acetone is a biomarker for diabetes and having a portable testing device could help to monitor diabetic and therapeutic progress. An advantage to this testing method is it is conducted at room temperature instead of 200 degrees Celsius. 3. The objective of this research is to determine the effect of thiol derivatized gold nanoparticles based on sensor(s) detection of VOCs. The VOCs to be tested are acetone, ethanol, and a mixture of acetone and ethanol. Each chip is tested under all three VOCs and three concentration levels (0.1, 1, and 5.0 ppm). VOC samples are used to test the sensors' ability to detect and differentiate VOCs. Sensors (also referred to as a chip) are prepared using several types of thiol derivatized gold nanoparticles. The factors are: thiol compound and molar volume loading of the thiol in synthesis. The average resistance results are used to determine the VOC selectivity of the sensors tested. The results show a trend of increasing resistance as VOC concentration is increased relative to dry air; which is used as baseline for VOCs. Several sensors show a high selectivity to one or more VOCs. Overall the 57 micromoles of 4-methoxy-toluenethiol sensor shows the strongest selectivity for VOCs tested. 3. Gerfen, Kurt. 2012. Detection of Acetone in Air Using Silver Ion Exchanged ZSM-5 and Zinc Oxide Sensing Films. Master of Science thesis, University of Louisville.

  1. INVESTIGATION OF ANTIMICROBIAL AND ANTI-INFLAMMATORY ACTIVITY OF CURCUMA LONGA

    Directory of Open Access Journals (Sweden)

    Mohammad Basir Khan , Md. Atai Rabby , Md Hasmat Ullah and Chowdhury Faiz Hossain*

    2013-03-01

    Full Text Available ABSTRACT: Turmeric (Curcuma longa is a rhizomatous herbaceous perennial plant used as a food additive. It has been reported that rhizome of this plant have antibacterial, antifungal, anti-inflammatory, antioxidant and antitumor property. Methanol extract of Rhizome of Curcuma longa was investigated here to see the antimicrobial actions and anti-inflammatory effect. During the extraction process a purified single compound (D1 was isolated and investigated for its antimicrobial activity. Significant antimicrobial activity than penicillin were found for 500µg C. longa extract. Anti-inflammatory action of C. longa was also assessed using mice models. The purified compound D1 fraction showed antimicrobial action in 50µg concentration. Our study reveal that C. longa has antimicrobial activity against various gram positive and gram negative bacteria where curcumin may not be the only compound that is responsible for the antimicrobial activity. On the other hand, C. longa extract had shown significant anti-inflammatory action.

  2. Investigation of frontal lobe activation with fNIRS and systemic changes during video gaming.

    OpenAIRE

    Tachtsidis, I; Papaioannou, A

    2013-01-01

    Frontal lobe activation caused by tasks such as videogames can be investigated using multichannel near-infrared spectroscopy (fNIRS), sometimes called optical topography. The aims of this study are to investigate the effects of video gaming (fighting and puzzle games) in the brain and the systemic physiology and to determine whether systemic responses during the gaming task are associated with the measurement of localised cerebral haemodynamic changes as measured by fNIRS. We used a continuou...

  3. Investigating the Use of Strategic Reading Activities in College English Class:A Case Study

    Institute of Scientific and Technical Information of China (English)

    刘江凤

    2015-01-01

    This paper, by adopting a qualitative research method, investigated the use of strategic reading activities by two female teachers in College English classes. Results showed that their commonly-used strategic reading activities in college English class⁃es reflected three types of reading comprehension strategies including use of prior knowledge, use of text elements with a high infor⁃mation value, and use of structure-marking elements in the text. Pedagogical implications were also discussed.

  4. Morpho-structural and luminescent investigations of niobium activated yttrium tantalate powders

    Energy Technology Data Exchange (ETDEWEB)

    Hristea, Amalia [' Raluca Ripan' Institute for Research in Chemistry, Fantanele 30, R-400294 Cluj-Napoca (Romania); Faculty of Chemistry and Chemical Engineering, ' Babes-Bolyai' University, 11 Arany Janos, 400028 Cluj-Napoca (Romania)], E-mail: amaliahristea@gmail.com; Popovici, Elisabeth-Jeanne; Muresan, Laura [' Raluca Ripan' Institute for Research in Chemistry, Fantanele 30, R-400294 Cluj-Napoca (Romania); Stefan, Maria [' Raluca Ripan' Institute for Research in Chemistry, Fantanele 30, R-400294 Cluj-Napoca (Romania); Faculty of Chemistry and Chemical Engineering, ' Babes-Bolyai' University, 11 Arany Janos, 400028 Cluj-Napoca (Romania); Grecu, Rodica [' Raluca Ripan' Institute for Research in Chemistry, Fantanele 30, R-400294 Cluj-Napoca (Romania); Johansson, Anders [Angstrom Laboratory, Department of Materials Chemistry, Uppsala University, Box 538, 751 21 Uppsala (Sweden); Boman, Mats [Angstrom Laboratory, Department of Materials Chemistry, Uppsala University, Box 538, 751 21 Uppsala (Sweden)], E-mail: mats.boman@mkem.uu.se

    2009-03-05

    Yttrium tantalate-based phosphors are a class of efficient luminescent materials used in medical imaging applications. The paper presents the influence of activator concentration, firing regime and flux nature on the crystalline structure, morphology and luminescent characteristics of niobium activated yttrium tantalate powders. Phosphors samples were prepared by solid-state reaction route and their properties were investigated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), photoluminescence (PL) measurements and scanning electron microscopy (SEM)

  5. Application of Data Mining methods in analysis of company's activity

    OpenAIRE

    Tyurina Dina N.

    2013-01-01

    The article considers expediency of application of Data Mining means along with traditional statistical methods of analysis of financial and economic activity of a company for revealing all possible factors that influence upon effectiveness of its functioning by means of solving clusterisation tasks. It shows main advantages of application of Data Mining means in analysis of company's activity. It offers an algorithm of conduction analysis of company's activity, which facilitates significant ...

  6. Analysis and Authenticity Investigations of Glass and Metallic Art Objects

    International Nuclear Information System (INIS)

    A suite of glass pieces of Art, and several metal-based corroded objects were studied in the frame of this project, which intends to accommodate two purposes; a) to investigate the feasibility of physico-chemical characterization of ancient glass by employing a non-widely used analytical technique, that of luminescence spectroscopy, along with conventionally used methods such as XRF and SEM-EDX, and b) to approach issues of counterfeiting of culturally-related iron and other metallic objects, by examining the features of their corrosion products, studied via a combination of the non-destructive RF-plasma treatment and the microscopic techniques. The results of the study show that luminescence measurements own diagnostic power that can aid substantially to the classifying and understanding of the manufacturing of ancient glass, particularly when bridged with longer-established analytical methods. Moreover, evident differences between corrosion layers of authentic metallic objects and of the ones created after artificial pre-corrosion, as ascertained by the plasma treatment and by microscopy (SEM or optical) study, provide a basis for suggesting such a combination of techniques for authenticity detection of corroded metallic objects with cultural heritage importance. (author)

  7. Deploying time investigation of automotive active hood lift mechanism with different design parameters of hinge part

    Directory of Open Access Journals (Sweden)

    Tae-Hoon Lee

    2016-04-01

    Full Text Available This article investigates the change in deploying time of an active hood lift mechanism of a passenger vehicle activated by a gunpowder actuator. Especially, in this work, the deploying time is investigated by changing the principal design parameters of the hinge part of the hood mechanism. After briefly introducing the working principle of the active hood lift mechanism operated by the gunpowder actuator, the governing dynamic equations of the active hood lift mechanism are formulated for deploying motion. Subsequently, using the governing equations of motion, the response time for deploying the hood lift mechanism is investigated by changing several geometric locations such as the location of actuator. Then, a comparison is made of the total response time to completely deploy the hood lift mechanism with the existing conventional hood lift mechanism and the proposed active hood lift mechanism. In addition, the workable driving speed of the proposed active hood lift mechanism is compared with the conventional one by changing the powder volume of the actuator.

  8. Investigations of 90 SR activity concentrations in animal bones in Croatia

    Energy Technology Data Exchange (ETDEWEB)

    Maracic, M.; Franic, Z.; Marovic, G. [Institute for Medical Research and Occupational Health, Zagreb (Croatia)

    2006-07-01

    The paper describes investigations of 90 Sr activity concentrations in long bones of some domestic animals (cows, pigs and lambs) collected over the last ten years in the Republic of Croatia. These investigations are a part of an extended and still ongoing monitoring programme of radioactive contamination of human environment in Croatia. Bone is a critical organ for the accumulation of many radionuclides, including 90 Sr, a highly toxic radionuclide, similar to calcium in its chemicalaviour and metabolic processes. It has been found that the 90 Sr activity concentrations in bones differ between respective animal species, the highest activity concentrations being found in lamb bones. As the decrease of activity concentrations can be generally described by the exponential function, by fitting the measured data to the theoretical curve was estimated the ecological half-life of 90 Sr in bones of respective species. In addition was investigated the relation between 90 Sr activity concentrations in bones and fallout. The transient increases and decreases in 90 Sr activity concentrations in bones can be partially explained by a variety of environmental physical factors that naturally fluctuate. (authors)

  9. Selected industrial and environmental applications of neutron activation analysis

    International Nuclear Information System (INIS)

    A review of the applications of Instrumental Neutron Activation Analysis (INAA) in the industrial and environmental fields is given. Detection limits for different applications are also given. (author)

  10. Echicetin coated polystyrene beads: a novel tool to investigate GPIb-specific platelet activation and aggregation.

    Directory of Open Access Journals (Sweden)

    Alexey Navdaev

    Full Text Available von Willebrand factor/ristocetin (vWF/R induces GPIb-dependent platelet agglutination and activation of αIIbβ3 integrin, which also binds vWF. These conditions make it difficult to investigate GPIb-specific signaling pathways in washed platelets. Here, we investigated the specific mechanisms of GPIb signaling using echicetin-coated polystyrene beads, which specifically activate GPIb. We compared platelet activation induced by echicetin beads to vWF/R. Human platelets were stimulated with polystyrene beads coated with increasing amounts of echicetin and platelet activation by echicetin beads was then investigated to reveal GPIb specific signaling. Echicetin beads induced αIIbβ3-dependent aggregation of washed platelets, while under the same conditions vWF/R treatment led only to αIIbβ3-independent platelet agglutination. The average distance between the echicetin molecules on the polystyrene beads must be less than 7 nm for full platelet activation, while the total amount of echicetin used for activation is not critical. Echicetin beads induced strong phosphorylation of several proteins including p38, ERK and PKB. Synergistic signaling via P2Y12 and thromboxane receptor through secreted ADP and TxA2, respectively, were important for echicetin bead triggered platelet activation. Activation of PKG by the NO/sGC/cGMP pathway inhibited echicetin bead-induced platelet aggregation. Echicetin-coated beads are powerful and reliable tools to study signaling in human platelets activated solely via GPIb and GPIb-triggered pathways.

  11. Echicetin Coated Polystyrene Beads: A Novel Tool to Investigate GPIb-Specific Platelet Activation and Aggregation

    Science.gov (United States)

    Petunin, Alexey; Clemetson, Kenneth J.; Gambaryan, Stepan; Walter, Ulrich

    2014-01-01

    von Willebrand factor/ristocetin (vWF/R) induces GPIb-dependent platelet agglutination and activation of αIIbβ3 integrin, which also binds vWF. These conditions make it difficult to investigate GPIb-specific signaling pathways in washed platelets. Here, we investigated the specific mechanisms of GPIb signaling using echicetin-coated polystyrene beads, which specifically activate GPIb. We compared platelet activation induced by echicetin beads to vWF/R. Human platelets were stimulated with polystyrene beads coated with increasing amounts of echicetin and platelet activation by echicetin beads was then investigated to reveal GPIb specific signaling. Echicetin beads induced αIIbβ3-dependent aggregation of washed platelets, while under the same conditions vWF/R treatment led only to αIIbβ3-independent platelet agglutination. The average distance between the echicetin molecules on the polystyrene beads must be less than 7 nm for full platelet activation, while the total amount of echicetin used for activation is not critical. Echicetin beads induced strong phosphorylation of several proteins including p38, ERK and PKB. Synergistic signaling via P2Y12 and thromboxane receptor through secreted ADP and TxA2, respectively, were important for echicetin bead triggered platelet activation. Activation of PKG by the NO/sGC/cGMP pathway inhibited echicetin bead-induced platelet aggregation. Echicetin-coated beads are powerful and reliable tools to study signaling in human platelets activated solely via GPIb and GPIb-triggered pathways. PMID:24705415

  12. Sondierbohrung Boettstein - results of hydrochemical investigations: analysis and interpretation

    International Nuclear Information System (INIS)

    During drilling and testing at Boettstein, samples were collected for geochemical and isotopic analysis. The sampling and analytical procedures, and chemical and isotopic results are described in detail in other Nagra Technische Berichte. This report reviews the procedures and analyses and provides a geochemical interpretation of the results. Two sedimentary horizons were sampled: the upper Muschelkalk and the Buntsandstein/weathered crystalline zone. Four sets of samples for geochemical analyses and five for isotope analyses were taken from the crystalline section above 1,000 m. They represented the three zones of highest hydraulic conductivity in that interval. The zones of highest conductivity below 1,000 m were also sampled but yielded so little water that only mixtures of formation water and borehole fluid could be collected. Samples were collected by pumping or from artesian outflow at the surface, and by using pressure vessels at depth. The crystalline section was drilled with deionized water and (or) formation water which contained uranine and MTFMBA tracers. The residual drilling fluid present in samples could thus be monitored precisely. The sedimentary section was drilled with mud which contained no tracer. Environmental tritium was used as a tracer for samples from both sedimentary and crystalline zones. The amount of drilling fluid present in the Muschelkalk and upper crystalline samples was negligible for geochemical interpretation. The zone of highest hydraulic conductivity in the lower crystalline section was sampled several times. No sample contained less than 40 percent drilling fluid, but the tracer in the drilling fluid made it possible to calculate back to the composition of formation water and so make some geochemical conclusions

  13. Mechanistic Investigation of Palladium–Catalyzed Allylic C–H Activation

    DEFF Research Database (Denmark)

    Engelin, Casper Junker; Jensen, Thomas; Rodríguez-Rodríguez, Sergio;

    2013-01-01

    The mechanism for the palladium–catalyzed allylic C–H activation was investigated using a combination of experimental and theoretical methods. A Hammett study revealed a buildup of a partial negative charge in the rate-determining step, while determination of the kinetic isotope effect (KIE...... acetate acts as a base in an intramolecular fashion during the C–H activation step. The re-oxidation of palladium was found to reach a similar energy level as that of the C–H activation. Calculations of turnover frequencies (TOF) for the entire catalytic cycle for the C–H alkylation were used to acquire a...

  14. Intruder Activity Analysis under Unreliable Sensor Networks

    Energy Technology Data Exchange (ETDEWEB)

    Tae-Sic Yoo; Humberto E. Garcia

    2007-09-01

    This paper addresses the problem of counting intruder activities within a monitored domain by a sensor network. The deployed sensors are unreliable. We characterize imperfect sensors with misdetection and false-alarm probabilities. We model intruder activities with Markov Chains. A set of Hidden Markov Models (HMM) models the imperfect sensors and intruder activities to be monitored. A novel sequential change detection/isolation algorithm is developed to detect and isolate a change from an HMM representing no intruder activity to another HMM representing some intruder activities. Procedures for estimating the entry time and the trace of intruder activities are developed. A domain monitoring example is given to illustrate the presented concepts and computational procedures.

  15. Effectiveness of Physical Activity Interventions for Preschoolers: A Meta-Analysis

    Science.gov (United States)

    Gordon, Elliott S.; Tucker, Patricia; Burke, Shauna M.; Carron, Albert V.

    2013-01-01

    Purpose: The purpose of the meta-analysis was to examine the effectiveness of physical activity interventions on physical activity participation among preschoolers. A secondary purpose was to investigate the influence of several possible moderator variables (e.g., intervention length, location, leadership, type) on moderate-to-vigorous physical…

  16. Conversion Matrix Analysis of GaAs HEMT Active Gilbert Cell Mixers

    DEFF Research Database (Denmark)

    Jiang, Chenhui; Johansen, Tom Keinicke; Krozer, Viktor

    2006-01-01

    In this paper, the nonlinear model of the GaAs HEMT active Gilbert cell mixer is investigated. Based on the model, the conversion gain expression of active Gilbert cell mixers is derived theoretically by using conversion matrix analysis method. The expression is verified by harmonic balance...

  17. In Vitro Antimicrobial Bioassays, DPPH Radical Scavenging Activity, and FTIR Spectroscopy Analysis of Heliotropium bacciferum

    OpenAIRE

    Ahmad, Sohail; AbdEl-Salam, Naser M.; Ullah, Riaz

    2016-01-01

    The present study deals with the antimicrobial, antioxidant, and functional group analysis of Heliotropium bacciferum extracts. Disc diffusion susceptibility method was followed for antimicrobial assessment. Noteworthy antimicrobial activities were recorded by various plant extracts against antibiotic resistant microorganisms. Plant flower extracts antioxidant activity was investigated against 2, 2-diphenyl-1-picryl hydrazyl radical by ultraviolet spectrophotometer (517 nm). Plant extracts di...

  18. Activation Analysis of Biological Samples of Forensic Interest

    International Nuclear Information System (INIS)

    In forensic (crime investigation) studies, samples of a biological origin are frequently used as evidence. Often it is necessary to compare one sample (associated with a victim or the scene of a crime) with another sample of the same general type (associated with a suspect in some way). The purpose of such comparisons is to establish, if possible, that - to a high degree of probability - the two samples have a common origin. Typically, all available relevant methods of comparison are utilized in such cases by the criminalist: microscopic examination; X-ray diffraction; infra-red, visible, and ultra-violet spectrometry; and various methods of elemental analysis. The forensic applications of high-flux thermal-neutron activation analysis (NAA) have shown great promise and are attracting considerable attention. The authors' laboratory has been engaged in such forensic NAA research and development studies for the past five years. (It also operates a non-profit Forensic Activation Analysis Service, available to all law enforcement agencies, for the NAA comparison of evidence samples involved in actual criminal cases. Samples from many actual cases have been thus examined.) In the United States, NAA results have now been successfully presented in court in some 20 actual cases. Some of the evidence-type materials of interest are non-biological; others are biological. Only the latter will be discussed in this paper. The principal evidence-type materials of a biological nature that have been examined in this laboratory by high-flux thermal-NAA to date are the following: hair, blood, faeces, urine, fingernails, skin, wood, tobacco, whisky, green plants, and marijuana. (In addition, a number of these evidence-type materials have also been studied in this laboratory by high-flux photonuclear activation analysis (PNAA); attention in this paper will be largely devoted to the thermal-NAA forensic studies.) The main topics to be reported upon in this paper are: (1) limits of

  19. High-Throughput Analysis of Enzyme Activities

    Energy Technology Data Exchange (ETDEWEB)

    Lu, Guoxin [Iowa State Univ., Ames, IA (United States)

    2007-01-01

    High-throughput screening (HTS) techniques have been applied to many research fields nowadays. Robot microarray printing technique and automation microtiter handling technique allows HTS performing in both heterogeneous and homogeneous formats, with minimal sample required for each assay element. In this dissertation, new HTS techniques for enzyme activity analysis were developed. First, patterns of immobilized enzyme on nylon screen were detected by multiplexed capillary system. The imaging resolution is limited by the outer diameter of the capillaries. In order to get finer images, capillaries with smaller outer diameters can be used to form the imaging probe. Application of capillary electrophoresis allows separation of the product from the substrate in the reaction mixture, so that the product doesn't have to have different optical properties with the substrate. UV absorption detection allows almost universal detection for organic molecules. Thus, no modifications of either the substrate or the product molecules are necessary. This technique has the potential to be used in screening of local distribution variations of specific bio-molecules in a tissue or in screening of multiple immobilized catalysts. Another high-throughput screening technique is developed by directly monitoring the light intensity of the immobilized-catalyst surface using a scientific charge-coupled device (CCD). Briefly, the surface of enzyme microarray is focused onto a scientific CCD using an objective lens. By carefully choosing the detection wavelength, generation of product on an enzyme spot can be seen by the CCD. Analyzing the light intensity change over time on an enzyme spot can give information of reaction rate. The same microarray can be used for many times. Thus, high-throughput kinetic studies of hundreds of catalytic reactions are made possible. At last, we studied the fluorescence emission spectra of ADP and obtained the detection limits for ADP under three different

  20. Neutron activation analysis of wheat samples

    Energy Technology Data Exchange (ETDEWEB)

    Galinha, C. [CERENA-IST, Technical University of Lisbon, Av. Rovisco Pais 1, 1049-001 Lisboa (Portugal); Instituto Tecnoclogico e Nuclear, URSN, E.N. 10, 2686-953 Sacavem (Portugal); Anawar, H.M. [Instituto Tecnoclogico e Nuclear, URSN, E.N. 10, 2686-953 Sacavem (Portugal); Freitas, M.C., E-mail: cfreitas@itn.pt [Instituto Tecnoclogico e Nuclear, URSN, E.N. 10, 2686-953 Sacavem (Portugal); Pacheco, A.M.G. [CERENA-IST, Technical University of Lisbon, Av. Rovisco Pais 1, 1049-001 Lisboa (Portugal); Almeida-Silva, M. [Instituto Tecnoclogico e Nuclear, URSN, E.N. 10, 2686-953 Sacavem (Portugal); Coutinho, J.; Macas, B.; Almeida, A.S. [INRB/INIA-Elvas, National Institute of Biological Resources, Est. Gil Vaz, 7350-228 Elvas (Portugal)

    2011-11-15

    The deficiency of essential micronutrients and excess of toxic metals in cereals, an important food items for human nutrition, can cause public health risk. Therefore, before their consumption and adoption of soil supplementation, concentrations of essential micronutrients and metals in cereals should be monitored. This study collected soil and two varieties of wheat samples-Triticum aestivum L. (Jordao/bread wheat), and Triticum durum L. (Marialva/durum wheat) from Elvas area, Portugal and analyzed concentrations of As, Cr, Co, Fe, K, Na, Rb and Zn using Instrumental Neutron Activation Analysis (INAA) to focus on the risk of adverse public health issues. The low variability and moderate concentrations of metals in soils indicated a lower significant effect of environmental input on metal concentrations in agricultural soils. The Cr and Fe concentrations in soils that ranged from 93-117 and 26,400-31,300 mg/kg, respectively, were relatively high, but Zn concentration was very low (below detection limit <22 mg/kg) indicating that soils should be supplemented with Zn during cultivation. The concentrations of metals in roots and straw of both varieties of wheat decreased in the order of K>Fe>Na>Zn>Cr>Rb>As>Co. Concentrations of As, Co and Cr in root, straw and spike of both varieties were higher than the permissible limits with exception of a few samples. The concentrations of Zn in root, straw and spike were relatively low (4-30 mg/kg) indicating the deficiency of an essential micronutrient Zn in wheat cultivated in Portugal. The elemental transfer from soil to plant decreases with increasing growth of the plant. The concentrations of various metals in different parts of wheat followed the order: Root>Straw>Spike. A few root, straw and spike samples showed enrichment of metals, but the majority of the samples showed no enrichment. Potassium is enriched in all samples of root, straw and spike for both varieties of wheat. Relatively to the seed used for cultivation

  1. Nonadiabatic Spin Torque Investigated Using Thermally Activated Magnetic Domain Wall Dynamics

    DEFF Research Database (Denmark)

    Eltschka, M.; Woetzel, Mathias; Rhensius, J.;

    2010-01-01

    Using transmission electron microscopy, we investigate the thermally activated motion of domain walls (DWs) between two positions in Permalloy (Ni80Fe20) nanowires at room temperature. We show that this purely thermal motion is well described by an Arrhenius law, allowing for a description...... magnetization gradients present....

  2. Investigations on abundance and activity of microbial sponge symbionts using quantitative real - time PCR

    DEFF Research Database (Denmark)

    Kumala, Lars; Hentschel, Ute; Bayer, Kristina

    the host. Of particular interest is determining the community structure and function of microbial symbionts in order to gain deeper insight into host-symbiont interactions. We investigated the abundance and activity of microbial symbionts in two Mediterranean sponge species using quantitative real-time PCR...

  3. Going Underground: A Field Investigation and Lab Activity on Karst Topography and Water Systems

    Science.gov (United States)

    O'Dell, Gary; Gonzalez-Espada, Wilson

    2011-01-01

    Students learn science best with activities that mirror the way scientists work. This article describes how geologists investigate groundwater flow systems in areas of karst topography--geologic formations shaped by dissolving bedrock--and provides a way for students to replicate this research. Students also use electric current to model water…

  4. Problematic Internet Use among Turkish University Students: A Multidimensional Investigation Based on Demographics and Internet Activities

    Science.gov (United States)

    Tekinarslan, Erkan; Gurer, Melih Derya

    2011-01-01

    This study investigated the Turkish undergraduate university students' problematic Internet use (PIU) levels on different dimensions based on demographics (e.g., gender, Internet use by time of day), and Internet activities (e.g., chat, entertainment, social networking, information searching, etc.). Moreover, the study explored some predictors of…

  5. Young Children's Literacy in the Activity Space of the Library: A Geosemiotic Investigation

    Science.gov (United States)

    Nichols, Sue

    2011-01-01

    An ecological approach, emphasizing the importance of understanding multiple contexts for learning, underpins this study of libraries as activity spaces for young children's literacy participation. Five libraries serving a diversity of communities were the subject of ethnographic investigation incorporating participant observation, visual…

  6. Combined in vivo and in silico investigations of activation of glycolysis in contracting skeletal muscle

    NARCIS (Netherlands)

    Schmitz, J. P. J.; Groenendaal, W.; Wessels, B.; Wiseman, R. W.; Hilbers, P. A. J.; Nicolay, K.; Prompers, J. J.; Jeneson, J. A. L.; van Riel, N. A. W.

    2013-01-01

    Schmitz JP, Groenendaal W, Wessels B, Wiseman RW, Hilbers PA, Nicolay K, Prompers JJ, Jeneson JA, van Riel NA. Combined in vivo and in silico investigations of activation of glycolysis in contracting skeletal muscle. Am J Physiol Cell Physiol 304: C180-C193, 2013. First published October 31, 2012; d

  7. Investigating Mediations in Student Activities in an English Immersion Context in Mainland China

    Science.gov (United States)

    Liang, Xiaohua

    2009-01-01

    This study aims to investigate the role of mediation in the learning process from a sociocultural perspective, activity theory in particular. This study was carried out in a primary English immersion school within the CCUEI Programs in Mainland China. Data were collected mainly through observations and interviews, which were then supplemented by…

  8. Investigating Learner Attitudes toward E-Books as Learning Tools: Based on the Activity Theory Approach

    Science.gov (United States)

    Liaw, Shu-Sheng; Huang, Hsiu-Mei

    2016-01-01

    This paper investigates the use of e-books as learning tools in terms of learner satisfaction, usefulness, behavioral intention, and learning effectiveness. Based on the activity theory approach, this research develops a research model to understand learner attitudes toward e-books in two physical sizes: 10? and 7?. Results suggest that screen…

  9. Automation of o-dianisidine assay for ceruloplasmin activity analyses: usefulness of investigation in Wilson's disease and in hepatic encephalopathy.

    Science.gov (United States)

    Siotto, Mariacristina; Pasqualetti, Patrizio; Marano, Massimo; Squitti, Rosanna

    2014-10-01

    Ceruloplasmin (Cp) is a serum ferroxidase that plays an essential role in iron metabolism. It is routinely tested by immunoturbidimetric assays that quantify the concentration of the protein both in its active and inactive forms. Cp activity is generally analyzed manually; the process is time-consuming, has a limited repeatability, and is not suitable for a clinical setting. To overcome these inconveniences, we have set the automation of the o-dianisidine Cp activity assay on a Cobas Mira Plus apparatus. The automation was rapid and repeatable, and the data were provided in terms of IU/L. The assay was adapted for human sera and showed a good precision [coefficient of variation (CV) 3.7 %] and low limit of detection (LoD 11.58 IU/L). The simultaneous analysis of Cp concentration and activity in the same run allowed us to calculate the Cp-specific activity that provides a better index of the overall Cp status. To test the usefulness of this automation, we tested this assay on 104 healthy volunteers and 36 patients with Wilson's disease, hepatic encephalopathy, and chronic liver disease. Cp activity and specific activity distinguished better patients between groups with respect to Cp concentration alone, and providing support for the clinical investigation of neurological diseases in which liver failure is one of the clinical hallmarks.

  10. Elemental analysis of biological tissues of animal models in muscular dystrophies investigation

    International Nuclear Information System (INIS)

    Element concentrations in biological tissues of Dmdmdx/J and C57BL/6 J mice strains were determined using the neutron activation analysis technique. Samples of whole blood, bones and organs (heart and muscle) of these strains were irradiated in the IEA-R1 nuclear reactor at IPEN-CNEN/SP (Brazil). To perform this investigation biological samples of two-month-old adult females (n = 10) and males (n = 9) for Dmdmdx/J (dystrophic mice), and males (n 12) for C57BL/6 J (control group), originally obtained from the Jackson Laboratory (Maine, USA) and further inbred at IPEN-CNEN/SP (Sao Paulo, Brazil), were used. A significant change was observed in the analysis of the heart of dystrophic mice suggesting that this dysfunction affects severely the heart muscle. These data may, in the future, contribute to the healthcare area, in veterinary medicine and in the pharmaceutical industry allowing the evaluation of the best procedures in diagnosis, treatment and investigations of neuromuscular diseases (muscular dystrophy) of patients through the use of animal models. (author)

  11. The Analysis of Activated Carbon Regeneration Technologies

    Institute of Scientific and Technical Information of China (English)

    姚芳

    2014-01-01

    A series of methods for activated carbon regeneration were briefly introduced.Such as thermal regeneration,chemical regeneration,biochemical regeneration,and newly supercritical fluid regeneration, electrochemical regeneration,light-catalyzed regeneration,and microwave radiation method,and the developing trend of activated carbon regeneration was predicted.

  12. Karyotype Analysis Activity: A Constructivist Learning Design

    Science.gov (United States)

    Ahmed, Noveera T.

    2015-01-01

    This classroom activity is based on a constructivist learning design and engages students in physically constructing a karyotype of three mock patients. Students then diagnose the chromosomal aneuploidy based on the karyotype, list the symptoms associated with the disorder, and discuss the implications of the diagnosis. This activity is targeted…

  13. Detailed Analysis of Motor Unit Activity

    DEFF Research Database (Denmark)

    Nikolic, Mile; Sørensen, John Aasted; Dahl, Kristian;

    1997-01-01

    System for decomposition of EMG signals intotheir constituent motor unit potentials and their firing patterns.The aim of the system is detailed analysis ofmotor unit variability.......System for decomposition of EMG signals intotheir constituent motor unit potentials and their firing patterns.The aim of the system is detailed analysis ofmotor unit variability....

  14. Experimental and numerical investigation on passive and active {mu}DMFC

    Energy Technology Data Exchange (ETDEWEB)

    Ghayor, R. [Graduate student, Fuel Cell Research Technology Group and Mechanical Engineering Department, Babol University of Technology, Babol (Iran); Fuel Cell Research Technology Group and Mechanical Engineering Department, Babol University of Technology, Babol (Iran); Shakeri, M.; Sedighi, K.; Farhadi, M. [Associate Prof., Fuel Cell Research Technology Group, Babol university of Technology, Babol (Iran); Fuel Cell Research Technology Group and Mechanical Engineering Department, Babol University of Technology, Babol (Iran)

    2010-09-15

    In this paper, design and fabrication of a micro direct methanol fuel cell based on stainless steel in two kind of active and passive with cross strip and parallel flow field are presented. Dropping pressure, velocity and heat transfer of the cell is simulated by a 3D modeling in fluent software. An optimum operating condition of the cell is obtained by the mass flow and temperature limitation. The cell was tested in different temperatures and mass flow rate and the cell performance is investigated in different condition. Maximum power density of the cell in active condition and at 60 C was 170 mW/cm{sup 2} and in passive condition was 85 mW/cm{sup 2}. A {mu}DMFC with different flow field is investigated. Cross strip flow field has shown better performance and the effect of cell orientation on performance is also investigated. (author)

  15. An investigation into non-invasive physical activity recognition using smartphones.

    Science.gov (United States)

    Kelly, Daniel; Caulfield, Brian

    2012-01-01

    Technology utilized to automatically monitor Activities of Daily Living (ADL) could be a key component in identifying deviations from normal functional profiles and providing feedback on interventions aimed at improving health. However, if activity recognition systems are to be implemented in real world scenarios such as health and wellness monitoring, the activity sensing modality must unobtrusively fit the human environment rather than forcing humans to adhere to sensor specific conditions. Modern smart phones represent a ubiquitous computing device which has already undergone mainstream adoption. In this paper, we investigate the feasibility of using a modern smartphone, with limited placement constraints, as the sensing modality for an activity recognition system. A dataset of 4 subjects performing 7 activities, using varying sensor placement conditions, is utilized to investigate this. Initial experiments show that a decision tree classifier performs activity classification with precision and recall scores of 0.75 and 0.73 respectively. More importantly, as part of this initial experiment, 3 main problems, and subsequently 3 solutions, relating to unconstrained sensor placement were identified. Using our proposed solutions, classification precision and recall scores were improved by +13% and +14.6% respectively.

  16. Bio-active nanoemulsions enriched with gold nanoparticle, marigold extracts and lipoic acid: In vitro investigations.

    Science.gov (United States)

    Guler, Emine; Barlas, F Baris; Yavuz, Murat; Demir, Bilal; Gumus, Z Pinar; Baspinar, Yucel; Coskunol, Hakan; Timur, Suna

    2014-09-01

    A novel and efficient approach for the preparation of enriched herbal formulations was described and their potential applications including wound healing and antioxidant activity (cell based and cell free) were investigated via in vitro cell culture studies. Nigella sativa oil was enriched with Calendula officinalis extract and lipoic acid capped gold nanoparticles (AuNP-LA) using nanoemulsion systems. The combination of these bio-active compounds was used to design oil in water (O/W) and water in oil (W/O) emulsions. The resulted emulsions were characterized by particle size measurements. The phenolic content of each nanoemulsion was examined by using both colorimetric assay and chromatographic analyses. Two different methods containing cell free chemical assay (1-diphenyl-2-picrylhydrazyl method) and cell based antioxidant activity test were used to evaluate the antioxidant capacities. In order to investigate the bio-activities of the herbal formulations, in vitro cell culture experiments, including cytotoxicity, scratch assay, antioxidant activity and cell proliferation were carried out using Vero cell line as a model cell line. Furthermore, to monitor localization of the nanoemulsions after application of the cell culture, the cell images were monitored via fluorescence microscope after FITC labeling. All data confirmed that the enriched N. sativa formulations exhibited better antioxidant and wound healing activity than N. sativa emulsion without any enrichment. In conclusion, the incorporation of AuNP-LA and C. officinalis extract into the N. sativa emulsions significantly increased the bio-activities. The present work may support further studies about using the other bio-active agents for the enrichment of herbal preparations to strengthen their activities. PMID:25009101

  17. The analysis and reconciliation of students' rebuttals in argumentation activities

    Science.gov (United States)

    Lin, Yu-Ren; Hung, Jeng-Fung

    2016-01-01

    The present study investigated the guidance provided by science teachers to resolve conflicts during socioscientific issue-based argumentation activities. A graphical representation (GR) was developed as a tool to code and analyze the dialogue interaction process. Through the GR and qualitative analysis, we identified three types of dialogue reconciling strategies. The first one consists of teacher management, in which the teacher temporarily maintains the right to speak when students get mired in an emotional rebuttal situation. The second strategy involves the use of qualifiers to identify the strengths and weaknesses of an opposing argument. The third strategy consists of providing students with guidance to keep both parties (i.e. the students taking, respectively, the affirmative and negative positions) on the same discussion topic and can be used to assist teachers with forming broad questions that prompt students to conduct deeper discussions. These reconciling strategies were beneficial in that they helped students to argue in a more reflective way.

  18. International conference activation analysis and its applications (ICAAA): abstracts

    International Nuclear Information System (INIS)

    International conference on the Activation Analysis and its Applications was hold in Beijing of China on October 15-19, 1990. It was organized and co-sponsored by Division of Activation Analysis and Radioanalysis, National Natural Science Foundation of China and China Nuclear Society, etc.. 159 pieces of Articles in the field were received in the conference, from many countries

  19. Development of educational program for neutron activation analysis

    Energy Technology Data Exchange (ETDEWEB)

    Chung, Yong Sam; Moon, Jong Hwa; Kim, Sun Ha; Ryel, Sung; Kang, Young Hwan; Lee, Kil Yong; Yeon, Yeon Yel; Cho, Seung Yeon

    2000-08-01

    This technical report is developed to apply an educational and training program for graduate student and analyst utilizing neutron activation analysis. The contents of guide book consists of five parts as follows; introduction, gamma-ray spectrometry and measurement statistics, its applications, to understand of comprehensive methodology and to utilize a relevant knowledge and information on neutron activation analysis.

  20. Development of educational program for neutron activation analysis

    International Nuclear Information System (INIS)

    This technical report is developed to apply an educational and training program for graduate student and analyst utilizing neutron activation analysis. The contents of guide book consists of five parts as follows; introduction, gamma-ray spectrometry and measurement statistics, its applications, to understand of comprehensive methodology and to utilize a relevant knowledge and information on neutron activation analysis

  1. PHYTOCHEMICAL ANALYSIS AND ANTIBACTERIAL ACTIVITY OF KEDROSTIS FOETIDISSIMA (JACQ. COGN.

    Directory of Open Access Journals (Sweden)

    Vasantha K

    2012-01-01

    Full Text Available Hexane, petroleum ether, chloroform, acetone and methanol extracts of leaf, stem and tuber of Kedrostis foetidissima were tested for qualitative and quantitative phytochemical analysis. The results of K. foetidissima leaf extracts revealed the presence of flavonoids and steroids in all extracts studied. Flavonoids, tannins, triterpenoids, phenols, steroids, glycosides and cardiac glycosides are present in the chloroform, methanol and acetone extracts while saponin were detected only in methanol and acetone extract. The various extracts were evaluated for antibacterial activities. Antibacterial activities of the extracts against Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae, Serratia marcescens and Pseudomonas aeruginosa were investigated by using disc diffusion method. It was observed that, chloroform, acetone and methanol extracts of leaf, stem and tuber of Kedrostis foetidissima showed activity against the entire tested gram positive and gram negative bacterial strains. Inhibitory effect of 100% concentration of petroleum ether and hexane extract was observed against Serratia marcesense (7.05; 4.00mm, Staphylococcus aureus (5.67; 6.83mm, Escherichia coli (4.93; 4.40mm and Pseudomonas aeruginosa (2.15; 3.50mm. Hence, this plant can be used to discover bioactive natural products that may serve as leads in the development of new pharmaceuticals that address unmet therapeutic use.

  2. PRELIMINARY PHYTOCHEMICAL INVESTIGATION AND ANTHELMINTIC ACTIVITY OF ACACIA SUMA (ROXB BARKS

    Directory of Open Access Journals (Sweden)

    Acharyya Suman

    2011-01-01

    Full Text Available The present work was conducted to investigate the preliminary phytochemical studies and anthelmintic activities on the bark of Acacia suma (Roxb. Family- Fabaceae against adult Indian earthworms, Pheretima posthuma. Various concentrations (5-25 mg/ml of each extract along with the reference samples (Piperazine citrate, Albendazole were subjected for anthelmintic activity study. The qualitative test revealed that the petroleum ether extracts contained only terpenoids but chloroform and hydroalcoholic (Methanol 70% v/v extracts exhibited the presence of carbohydrates, alkaloids, glycosides, flavonoids, tannins and saponins but amino acids and steroids were absent. All the extracts showed anthelmintic activity when compared with petroleum ether and chloroform extracts. The anthelmintic activity of hydroalcoholic extract was comparable with reference drugs.

  3. Analysis of microseismic signals and temperature recordings for rock slope stability investigations in high mountain areas

    Science.gov (United States)

    Occhiena, C.; Coviello, V.; Arattano, M.; Chiarle, M.; Morra di Cella, U.; Pirulli, M.; Pogliotti, P.; Scavia, C.

    2012-07-01

    The permafrost degradation is a probable cause for the increase of rock instabilities and rock falls observed in recent years in high mountain areas, particularly in the Alpine region. The phenomenon causes the thaw of the ice filling rock discontinuities; the water deriving from it subsequently freezes again inducing stresses in the rock mass that may lead, in the long term, to rock falls. To investigate these processes, a monitoring system composed by geophones and thermometers was installed in 2007 at the Carrel hut (3829 m a.s.l., Matterhorn, NW Alps). In 2010, in the framework of the Interreg 2007-2013 Alcotra project no. 56 MASSA, the monitoring system has been empowered and renovated in order to meet project needs. In this paper, the data recorded by this renewed system between 6 October 2010 and 5 October 2011 are presented and 329 selected microseismic events are analysed. The data processing has concerned the classification of the recorded signals, the analysis of their distribution in time and the identification of the most important trace characteristics in time and frequency domain. The interpretation of the results has evidenced a possible correlation between the temperature trend and the event occurrence. The research is still in progress and the data recording and interpretation are planned for a longer period to better investigate the spatial-temporal distribution of microseismic activity in the rock mass, with specific attention to the relation of microseismic activity with temperatures. The overall goal is to verify the possibility to set up an effective monitoring system for investigating the stability of a rock mass under permafrost conditions, in order to supply the researchers with useful data to better understand the relationship between temperature and rock mass stability and, possibly, the technicians with a valid tool for decision-making.

  4. Analysis of microseismic signals and temperature recordings for rock slope stability investigations in high mountain areas

    Directory of Open Access Journals (Sweden)

    C. Occhiena

    2012-07-01

    Full Text Available The permafrost degradation is a probable cause for the increase of rock instabilities and rock falls observed in recent years in high mountain areas, particularly in the Alpine region. The phenomenon causes the thaw of the ice filling rock discontinuities; the water deriving from it subsequently freezes again inducing stresses in the rock mass that may lead, in the long term, to rock falls. To investigate these processes, a monitoring system composed by geophones and thermometers was installed in 2007 at the Carrel hut (3829 m a.s.l., Matterhorn, NW Alps. In 2010, in the framework of the Interreg 2007–2013 Alcotra project no. 56 MASSA, the monitoring system has been empowered and renovated in order to meet project needs.

    In this paper, the data recorded by this renewed system between 6 October 2010 and 5 October 2011 are presented and 329 selected microseismic events are analysed. The data processing has concerned the classification of the recorded signals, the analysis of their distribution in time and the identification of the most important trace characteristics in time and frequency domain. The interpretation of the results has evidenced a possible correlation between the temperature trend and the event occurrence.

    The research is still in progress and the data recording and interpretation are planned for a longer period to better investigate the spatial-temporal distribution of microseismic activity in the rock mass, with specific attention to the relation of microseismic activity with temperatures. The overall goal is to verify the possibility to set up an effective monitoring system for investigating the stability of a rock mass under permafrost conditions, in order to supply the researchers with useful data to better understand the relationship between temperature and rock mass stability and, possibly, the technicians with a valid tool for decision-making.

  5. Fast-neutron activation analysis of light elements

    International Nuclear Information System (INIS)

    Full text: The determination of lithium, carbon, oxygen, nitrogen and other light chemical elements in various modern materials in microgram level is of importance for analytical science. As it is well-known, a thermal neutron activation of C, H, N, and O produces negligible γ-ray activity. 13C (n, γ) 14C and 2H (n, γ) 3H reactions produce very small activities of the non- γ- emitters 3H and 14C, and the 19O (n, γ)19O and 15N(n, γ)16N reactions give very short lived 19O (27 sec) and 16N (7.1 sec). All of these reactions have extremely low thermal neutron cross sections. Therefore a major advantage of the instrumental neutron activation analysis (INAA) is the determination of trace elements in biological, medical and environmental materials. For this reason the above mentioned problems are solved with use of some variants of nuclear analytical techniques based on application of charged particle accelerators. However, there are several non-traditional reactor activation analysis techniques to solve such problems which have been developed and applied in various fields of semiconductor industry, biology, geology. In recent years these techniques were named as the nuclear reactor based charged particles activation analysis (NRCPAA). We distinguished two possible applications of a nuclear reactor as charged particles source. During last years the capabilities of the NRCPAA were investigated intensively and some our results were applied to determine light elements contents [1,2]. The recoil protons are produced as the result of (n, p) elastic and inelastic scattering interaction of fast neutrons with nucleus of light elements, for example, hydrogen. These protons are applied for the development of proton activation analysis for the determination of large concentrations of Li, B and O. The non-destructive activation analysis with use of 14-MeV fast neutrons (FNAA) is the most suitable method for analysis of N, P and Si. FNAA was applied for determination of nitrogen

  6. Large sample neutron activation analysis of a ceramic vase

    OpenAIRE

    Stamatelatos, I.E.; Tzika, F.; Vasilopoulou, T.; Koster-Ammerlaan, M.J.J.

    2010-01-01

    Large Sample Neutron Activation Analysis (LSNAA) was applied to perform non-destructive elemental analysis of a ceramic vase. Appropriate neutron self-shielding and gamma ray detection efficiency calibration factors were derived using Monte Carlo code MCNP5. The results of LSNAA were compared against Instrumental Neutron Activation Analysis (INAA) results and a satisfactory agreement between the two methods was observed. The ratio of derived concentrations between the two methods was within 0...

  7. Investigation on activation and strain-rate sensitivity in ultrafine-grained tantalum

    Energy Technology Data Exchange (ETDEWEB)

    Wang, Y.; Liu, Y.; Wang, J.T., E-mail: jtwang@njust.edu.cn

    2015-05-21

    The activation volume and strain-rate sensitivity (SRS) of a plastic deformation process and their relationship are investigated in the present work. Through theoretical modeling based on the movement of both isolated kinks and kink pairs in a dislocation line, a new form of theoretical relationship between the strain-rate sensitivity and activation volume was developed, which reduces to the conventional and frequently used form of the same relationship when SRS is approaching zero. The strain rate jump test during the necking stage of tensile testing process is validated through combined theoretical analytical approaches, for obtaining strain rate sensitivity of materials with short uniform tensile stage, such as UFG metals. To validate the theoretical approaches and modeling presented in this work, strain-rate jump tests and repeated stress relaxation experiments were conducted, to measure the SRS and activation volume of commercial pure ultrafine-grained tantalum prepared by equal channel angular pressing. The experimental relationship between the strain-rate sensitivity and the activation volume of these tantalum samples fits well with the new form of theoretical relationship developed in this investigation. Experimental data from literature on nickel confirms the new form as well. The new form of theoretical relationship between strain-rate sensitivity and activation volume can be applied for both bcc and fcc metals as long as the major plastic deformation mechanism is dislocation gliding.

  8. Teaching-Learning Activity Modeling Based on Data Analysis

    Directory of Open Access Journals (Sweden)

    Kyungrog Kim

    2015-03-01

    Full Text Available Numerous studies are currently being carried out on personalized services based on data analysis to find and provide valuable information about information overload. Furthermore, the number of studies on data analysis of teaching-learning activities for personalized services in the field of teaching-learning is increasing, too. This paper proposes a learning style recency-frequency-durability (LS-RFD model for quantified analysis on the level of activities of learners, to provide the elements of teaching-learning activities according to the learning style of the learner among various parameters for personalized service. This is to measure preferences as to teaching-learning activity according to recency, frequency and durability of such activities. Based on the results, user characteristics can be classified into groups for teaching-learning activity by categorizing the level of preference and activity of the learner.

  9. Faculty Activity Analysis in the Universidad Tecnica Del Estado Campuses.

    Science.gov (United States)

    Karadima, Oscar

    An analysis of academic activities of college faculty at the eight campuses of Chile's Universidad Tecnica del Estado was conducted. Activities were grouped into seven categories: direct teaching, indirect teaching, research, community services, faculty development, academic administration, and other activities. Following the narrative…

  10. Barbiturate bearing aroylhydrazine derivatives: Synthesis, NMR investigations, single crystal X-ray studies and biological activity

    Science.gov (United States)

    Giziroglu, Emrah; Sarikurkcu, Cengiz; Aygün, Muhittin; Basbulbul, Gamze; Soyleyici, H. Can; Firinci, Erkan; Kirkan, Bulent; Alkis, Ayse; Saylica, Tayfur; Biyik, Halil

    2016-03-01

    A series of barbituric acid aroylhydrazine derivatives have been prepared from their corresponding 1,3-dimethyl-5-acetyl barbituric acid and aroylhydrazines. All compounds have been fully characterized by using FT-IR, multinuclear NMR (1H, 13C) and Mass (MS) spectrometry. We also describe the X-ray crystal structure of 3a, which crystallizes in the monoclinic P21/n space group. The crystal structure is stabilized with infinite linear chains of dimeric units. Furthermore, all compounds were investigated for their tyrosinase inhibition, antioxidative and antimicrobial activies. The results from biological activity assays have shown that all of compounds have excellent antioxidant, significant tyrosinase inhibition and moderate antimicrobial activity.

  11. Phytochemical investigation of sesquiterpenes from the fruits of Schisandra chinensis and their cytotoxic activity.

    Science.gov (United States)

    Venkanna, A; Siva, B; Poornima, B; Vadaparthi, P R Rao; Prasad, K Rajendra; Reddy, K Ashok; Reddy, G Bhanu Prakash; Babu, K Suresh

    2014-06-01

    Phytochemical investigation of ethanolic extract from the fruits of Schisandra chinensis led to the isolation of four new sesquiterpenes (1-4); their structures were determined by a combination of NMR (1D and 2D) and MS spectroscopic techniques. In addition, all these isolates were screened for their cytotoxic activities against MCF-7, Caco-2, Hela, Lncap, Hep G2 and MDA-MB231 cancer cell lines. Results indicated that compounds 2 and 3 displayed potent cytotoxic activity against Caco2 cell lines with IC50 values of 17.10 μg/mM and 16.46 μg/mM, respectively.

  12. Photosynthetic activity of dominant algal species in eutrophic shallow lake (Grosser Mueggelsee, Berlin) investigated by microautoradiography

    International Nuclear Information System (INIS)

    Photosynthetic activity of dominant phytoplankton in a eutrophic shallow lake was investigated by autoradiography in 1979 and 1980. It was shown by light and dark field microscopy that all species of cyanophyta (Oscillatoria redekei, Oscillatoria agardhii, Aphanizomenon flos-aquae) were characterized by a continuously high uptake of NaH14CO3. Similarly high photosynthetic activity was observed during the occurrence of Cryptomonas sp. and nanoplankton. Contrary to these observations, diatoms showed remarkably high portions of photosynthetically inactive biomass when their development was abundant. The reasons for this discrepancy between high biomass of diatoms and relatively low primary production (measured by 14C method and autoradiography) are discussed. (author)

  13. Insurer’s activity as object of economic analysis

    Directory of Open Access Journals (Sweden)

    O.O. Poplavskiy

    2015-12-01

    Full Text Available The article is devoted to the substantiation of theoretical fundamentals of insurer’s analysis and peculiarities of its implementation. The attention has been focused on the important role of economic analysis in economic science which is confirmed by its active use in research and practical orientation. The author summarizes the classification and principles of insurer’s activity analysis, supplements it with specific principles for insurer’s environment, publicity and risk-orientation which enable increasingly to take into account the peculiarities of insurance relations. The paper pays attention to the specification of elements of analysis and its key directions including the analysis of insurer’s financing, the analysis of insurance operations and the analysis of investment activity which will allow the effective functioning of risk management system.

  14. Introduction of Prompt Gamma Thermal Neutron Activation Analysis at CARR

    Institute of Scientific and Technical Information of China (English)

    WANG; Xing-hua; XIAO; Cai-jin; ZHANG; Gui-ying; YAO; Yong-gang; JIN; Xiang-chun; WANG; Ping-sheng; HUA; Long; NI; Bang-fa

    2013-01-01

    CARR will provide with maximal neutron flux in Asia,the third of the world.By using the high quality neutron beam and the advanced international experience,Prompt Gamma Neutron Activation Analysis(PGNAA)facility will be setup at high level.PGNAA on CARR will promote the development of nuclear analysis technology and improve Chinese status in the nuclear analysis field.

  15. Preliminary investigation on the antibacterial activity of mango (Mangifera indica L:Anacardiaceae) seed kernel

    Institute of Scientific and Technical Information of China (English)

    Jasminder Kaur; Xavier Rathinam; Marimuthu Kasi; Khoo Miew Leng; Rajasekaran Ayyalu; Kathiresan S; Sreeramanan Subramaniam

    2010-01-01

    Objective:To evaluate the antibacterial activity of the methanolic extract of mango (Mangifera indicaL.) seed kernel.Methods: Chokanan mango seed kernel and seed kernels from assorted mango varieties were collected, cleaned, dried and powered. Crude methanolic extracts of mango seed kernel were analyzed for the phytochemical constituents. The free radical scavenging activity was determined by2,2-Diphenyl-1-picrylhydrazyl(DPPH)assay. Antibacterial activity was evaluated by disc diffusion assay with three medically important bacterial pathogens such as methicillin resistantStaphylococcus aureus (S. aureus)(MRSA),Escherichia coli (E. coli) andVibrio vulnificus (V. vulnificus).Results: Qualitative phytochemical analysis indicated the presence of important phytochemical compounds such as glycosides, saponins, flavanoids, tannins and alkaloids. There was no significant difference in the phytochemical content between the single and assorted mango seed kernels. However, the free radical scavenging study indicated that the assorted mango kernels showed slightly higher activity than the single species (P<0.05). The crude methanolic extract of mango seed kernel at a concentration of100 mg/mL is found to have potential antimicrobial activity againstMRSA and E. coli compared toV. vulnificus. Study on the antibacterial activity also indicated that there was no significant difference in the antibacterial activity of the single and assorted mango seed kernel extracts.Conclusions: The present study conclusively demonstrates the free radical scavenging activity and antibacterial activities of mango seed kernel. In addition, the results also indicated that there is no significant difference in the phytochemical content and biological activity of mango kernels from single and assorted mango varieties.

  16. An investigation of the mimetic enzyme activity of two-dimensional Pd-based nanostructures

    Science.gov (United States)

    Wei, Jingping; Chen, Xiaolan; Shi, Saige; Mo, Shiguang; Zheng, Nanfeng

    2015-11-01

    In this work, we investigated the mimetic enzyme activity of two-dimensional (2D) Pd-based nanostructures (e.g. Pd nanosheets, Pd@Au and Pd@Pt nanoplates) and found that they possess intrinsic peroxidase-, oxidase- and catalase-like activities. These nanostructures were able to activate hydrogen peroxide or dissolved oxygen for catalyzing the oxidation of organic substrates, and decompose hydrogen peroxide to generate oxygen. More systematic investigations revealed that the peroxidase-like activities of these Pd-based nanomaterials were highly structure- and composition-dependent. Among them, Pd@Pt nanoplates displayed the highest peroxidase-like activity. Based on these findings, Pd-based nanostructures were applied for the colorimetric detection of H2O2 and glucose, and also the electro-catalytic reduction of H2O2. This work offers a promising prospect for the application of 2D noble metal nanostructures in biocatalysis.In this work, we investigated the mimetic enzyme activity of two-dimensional (2D) Pd-based nanostructures (e.g. Pd nanosheets, Pd@Au and Pd@Pt nanoplates) and found that they possess intrinsic peroxidase-, oxidase- and catalase-like activities. These nanostructures were able to activate hydrogen peroxide or dissolved oxygen for catalyzing the oxidation of organic substrates, and decompose hydrogen peroxide to generate oxygen. More systematic investigations revealed that the peroxidase-like activities of these Pd-based nanomaterials were highly structure- and composition-dependent. Among them, Pd@Pt nanoplates displayed the highest peroxidase-like activity. Based on these findings, Pd-based nanostructures were applied for the colorimetric detection of H2O2 and glucose, and also the electro-catalytic reduction of H2O2. This work offers a promising prospect for the application of 2D noble metal nanostructures in biocatalysis. Electronic supplementary information (ESI) available: TEM images, EDX and dispersion stability of Pd-based nanomaterials

  17. Design professional activity analysis in design management

    Directory of Open Access Journals (Sweden)

    Claudia de Souza Libanio

    2013-08-01

    Full Text Available Design use perception, as an essential element for achieving competitive advantage, also suggests the need to manage the design activities in companies. However, a few is discussed about the activity of these design professionals who participate in this process, their roles, functions and competencies, including  their connections to a company and other involved sectors. This article aims to analyze, during the design management processes, the work relations of design professionals connected to organizations both internal and externally, in order to comprehend the structure and intervenient factors on the activity of these professionals, as well as the interactions with their main coworkers. The methodology was exploratory and qualitative, using in-depth interviews with three design professionals. Subsequently, the responses were analyzed allowing the comparison of these obtained data to the theoretical bases researched. Through this case study, it was possible to realize the aspects and the structure of the design professional activity, connected intern and externally to organizations, as well as its relations with the main coworkers.

  18. Microscopic Analysis of Activated Sludge. Training Manual.

    Science.gov (United States)

    Office of Water Program Operations (EPA), Cincinnati, OH. National Training and Operational Technology Center.

    This training manual presents material on the use of a compound microscope to analyze microscope communities, present in wastewater treatment processes, for operational control. Course topics include: sampling techniques, sample handling, laboratory analysis, identification of organisms, data interpretation, and use of the compound microscope.…

  19. Active Shape Analysis of Mandibular Growth

    DEFF Research Database (Denmark)

    Hilger, Klaus Baggesen; Larsen, Rasmus; Kreiborg, Sven;

    2003-01-01

    This work contains a clinical validation using biological landmarks of a Geometry Constrained Diffusion registration of mandibular surfaces. Canonical Correlations Analysis is extended to analyse 3D landmarks and the correlations are used as similarity measures for landmark clustering. A novel Ac...

  20. Problematic Internet use among Turkish university students: A multidimensional investigation based on demographics and Internet activities

    OpenAIRE

    Tekinarslan, Erkan; Gürer, Melih Derya

    2011-01-01

     This study investigates the Turkish undergraduate university students’ problematic Internet use (PIU) levels on different dimensions based on demographics (e.g., gender, Internet use by time of day), and Internet activities (e.g., chat, entertainment, social networking, information searching, etc.).Moreover, the study explored some predictors of PIU on different dimensions among the Turkish undergraduate students (N=610). The results indicate that the female students (N=358) had significantl...

  1. Problematic internet use among Turkish university students: A multidimensional investigation based on demographics and internet activities

    OpenAIRE

    Erkan Tekinarslan; Melih Derya Gürer

    2011-01-01

     This study investigates the Turkish undergraduate university students’ problematic Internet use (PIU) levels on different dimensions based on demographics (e.g., gender, Internet use by time of day), and Internet activities (e.g., chat, entertainment, social networking, information searching, etc.).Moreover, the study explored some predictors of PIU on different dimensions among the Turkish undergraduate students (N=610). The results indicate that the female students (N=358) had s...

  2. An Investigation of Preschool Teacher Candidates' views On Applications of Educational Activities

    OpenAIRE

    Oguz Serdar Kesicioglu; Mehmet Mart

    2014-01-01

    The aim of this study investigates the views of preschool teacher candidates on applications of educational activities in preschool education. This research is the screening model research and 110 teacher candidates attending the third and fourth grades in the Department of Preschool Teaching in Faculty of Education in Giresun University and filling out the form constitute the working group of this study.'A Semi-Structured Interview Form' is used to gather the data of the study. With this aim...

  3. Investigation of in vitro Opioid Receptor Binding Activities of Some Turkish Salvia species

    OpenAIRE

    Özge Gündüz Çınar; Hasan Kırmızıbekmez; Galip Akaydın; Erdem Yesilada

    2011-01-01

    Kappa Opioid Peptide Receptor (KOPr) activation produces analgesic, psychotomimetic, diuretic and antipruritic effects. KOPr ligands are investigated for their potential roles in the treatment of addiction, depression, feeding behavior, psychosis and schizophrenia. In this study the methanolic extracts of a number of Salvia species which are native to Turkey (S. tomentosa, S. tchihatcheffii , S. rosifolia, S. dichroantha and S. sclarea) were tested for their potential binding to opioid recept...

  4. Investigation of cryogenic hydrogen storage on high surface area activated carbon. Equilibrium and dynamics

    Energy Technology Data Exchange (ETDEWEB)

    Paggiaro, Ricardo Gaspar

    2008-11-29

    This thesis investigates cryo-adsorptive systems for hydrogen storage for mobile applications. By means of macroscopic and microscopic balance models, an extensive analysis is carried out, including among others the investigation of the thermal effects during high-pressure system filling, venting losses during normal operation and inactivity, time-course of system pressure and temperature and gas delivery under various operating conditions. Model results were compared with experimental data, good agreement was obtained. The analysis also includes a comparison to other storage technologies such as cryo-compressed gas and liquefaction storage. The results show that cryo-adsorptive systems have storage characteristics comparable to compressed gas systems, but at a much lower pressure. They are also energetically more efficient than liquid hydrogen systems. However, the necessity of cryotemperatures and thermal management during operation and filling might limit their application. (orig.)

  5. Structure-Activity Relationship Investigation of Some New Tetracyclines by Electronic Index Methodology

    CERN Document Server

    Sato, Fernando; Santos, Helio F dos; Galvao, Douglas S

    2007-01-01

    Tetracyclines are an old class of molecules that constitute a broad-spectrum antibiotics. Since the first member of tetracycline family were isolated, the clinical importance of these compounds as therapeutic and prophylactic agents against a wide range of infections has stimulated efforts to define their mode of action as inhibitors of bacterial reproduction. We used three SAR methodologies for the analysis of biological activity of a set of 104 tetracycline compounds. Our calculation were carried out using the semi-empirical Austin Method One (AM1) and Parametric Method 3 (PM3). Electronic Indices Methodology (EIM), Principal Component Analysis (PCA) and Artificial Neural Networks (ANN) were applied to the classification of 14 old and 90 new proposed derivatives of tetracyclines. Our results make evident the importance of EIM descriptors in pattern recognition and also show that the EIM can be effectively used to predict the biological activity of Tetracyclines.

  6. The Application of Parallel Robotics to Investigate the Effect of Lumbar Bracing on Trunk Muscle Activity

    Directory of Open Access Journals (Sweden)

    Gregory N. Kawchuk

    2010-01-01

    Full Text Available Lumbar bracing is prescribed frequently for disability caused by low back pain; however, investigations into this practice demonstrate a range of patient outcomes. This inconsistency may arise from the practice of employing voluntary, single-axis trunk movements when investigating braces. Alternatively, this study employed a parallel robot to create a standardised, multi-axis testing environment. Surface electromyographic (sEMG data were collected from the trunk of 24 asymptomatic participants, who were seated on the robot, tilted to 15°, then circumducted while attempting to maintain an upright posture. Multiple trials were performed for three randomised conditions: non-braced, soft-material brace and stiff-material brace. As expected, the sEMG activity was significantly reduced in the majority of muscle responses (201/240. Unexpectedly, a paradoxical increase in the sEMG activity was observed in 39/240 responses. While lumbar bracing reduces the sEMG activity on average, these data suggest the existence of an infrequent paradoxical response that may provide a possible explanation for the discordant results observed in previous bracing investigations.

  7. An investigation into the relationship between political activity levels and political market orientation

    DEFF Research Database (Denmark)

    Ormrod, Robert P.; Henneberg, Stephan C.

    2010-01-01

    Purpose - The key objective of this research is to investigate the relationship between party member activity-levels and perceptions of their party's political market orientation. Specifically, it aims to scrutinise the differences in the interplay of attitudinal and behavioural aspects of politi....... Originality/value - This is one of a few studies empirically investigating the concept of political market orientation. Especially the focus on a wide range of respondents, in line with recent development in the literature on commercial market.......Purpose - The key objective of this research is to investigate the relationship between party member activity-levels and perceptions of their party's political market orientation. Specifically, it aims to scrutinise the differences in the interplay of attitudinal and behavioural aspects...... of political market orientation. Design/methodology/approach - Using a wide variety of respondent groups within the party, the research draws on an existing conceptualisation of political market orientation and empirically test its relationship with party member activity levels. Three models, plus a baseline...

  8. Investigation of catalytic activity towards oxygen reduction reaction of Pt dispersed on boron doped graphene in acid medium.

    Science.gov (United States)

    Pullamsetty, Ashok; Sundara, Ramaprabhu

    2016-10-01

    Boron doped graphene was prepared by a facile method and platinum (Pt) decoration over boron doped graphene was done in various chemical reduction methods such as sodium borohydride (NaBH4), polyol and modified polyol. X-ray diffraction analysis indicates that the synthesized catalyst particles are present in a nanocrystalline structure and transmission and scanning electron microscopy were employed to investigate the morphology and particle distribution. The electrochemical properties were investigated with the help of the rotating disk electrode (RDE) technique and cyclic voltammetry. The results show that the oxygen reduction reaction (ORR) takes place by a four-electron process. The kinetics of the ORR was evaluated using K-L and Tafel plots. The electrocatalyst obtained in modified polyol reduction method has shown the better catalytic activity compared to other two electrocatalysts. PMID:27393888

  9. ANALYSIS OF ECOLOGICAL ACTIVITY OF PODLASIE PROVINCE

    OpenAIRE

    Agnieszka Kisło; Iwona Skoczko

    2014-01-01

    The beginning of the period where the impact of human activity took dangerous size is considered to be 40 years of the nineteenth century. Then the large-scale production of electricity increased production of metallurgical industry and transport development. Significant changes contributed to rapid population growth and urbanization and industrialization processes. Man by intensive exploitation reduces or completely exhausted most natural resources. This has resulted in the availability crit...

  10. Synthesis, structural characterization, antimicrobial activities and theoretical investigations of some 4-(4-aminophenylsulfonyl) phenylimino) methyl)-4-(aryldiazenyl) phenol

    Science.gov (United States)

    Ghasemian, Motaleb; Kakanejadifard, Ali; Karami, Tahereh

    2016-11-01

    The azo-azomethine dyes with a different substitution have been designed from the reaction of 4,4‧-diaminodiphenyl sulfone with 2-hydroxy-5-(aryldiazenyl)benzaldehyde. The compounds have been characterized by elemental analysis, Mass, IR, UV-Vis, TGA-DTA and NMR spectroscopy. The solvatochromism behaviors, effects of substitution and pH on the electronic absorption spectra of dyes were evaluated. The in vitro antimicrobial activities were also screened for their potential for antibiotic activities by broth micro dilution method. Also, the optimum molecular geometries, molecular electrostatic potential (MEP), nucleus-independent chemical shift (NICS) and frontier molecular orbitals (FMO), vibrational spectra (IR) and electronic absorption (UV-Vis) spectra of the title compounds have been investigated with the help of DFT and TDDFT methods with 6-311 ++G(d,p) basis sets and PCM calculations. The results of the calculations show excellent agreement with the experimental value.

  11. Explorative investigation of biomarkers of brain damage and coagulation system activation in clinical stroke differentiation

    DEFF Research Database (Denmark)

    Undén, Johan; Strandberg, Karin; Malm, Jan;

    2009-01-01

    INTRODUCTION: A simple and accurate method of differentiating ischemic stroke and intracerebral hemorrhage (ICH) is potentially useful to facilitate acute therapeutic management. Blood measurements of biomarkers of brain damage and activation of the coagulation system may potentially serve as nov......: This exploratory study indicated that blood levels of biomarkers GFAP and APC-PCI, prior to neuroimaging, may rule out ICH in a mixed stroke population.......INTRODUCTION: A simple and accurate method of differentiating ischemic stroke and intracerebral hemorrhage (ICH) is potentially useful to facilitate acute therapeutic management. Blood measurements of biomarkers of brain damage and activation of the coagulation system may potentially serve as novel...... diagnostic tools for stroke subtypes. METHODS: Ninety-seven stroke patients were prospectively investigated in a multicenter design with blood levels of brain biomarkers S100B, neuron specific enolase (NSE), glial fibrillary acidic protein (GFAP) as well as a coagulation biomarker, activated protein C...

  12. Computational investigation of the neutron shielding and activation characteristics of borated concrete with polyethylene aggregate

    Energy Technology Data Exchange (ETDEWEB)

    Park, S.J.; Jang, J.G.; Lee, H.K., E-mail: leeh@kaist.ac.kr

    2014-09-15

    This paper presents the result of a computational study to investigate the neutron shielding and activation characteristics of concretes containing boron carbide and polyethylene. Various mixes were considered with changes in the contents of boron carbide and polyethylene aggregate. The Monte Carlo simulation code MCNP-5 was utilized to determine the transmission of neutron through concrete at different energies from 0.1 eV to 1 MeV, and ORIGEN-S code was then used to predict activation characteristics of the concretes. It was shown that the replacement of polyethylene in borated concrete greatly enhanced the shielding efficiency of the concrete, and total activity levels of the concrete were considerably decreased with this replacement. Furthermore, double-layered structures having the first layer of polyethylene aggregate-replaced concrete and the second layer of 2 wt% borated concrete are shown to improve shielding efficiency more significantly than monolithic structures.

  13. Experimental investigations of ammonia adsorption and nitric oxide reduction on activated coke

    Energy Technology Data Exchange (ETDEWEB)

    Sirko Ogriseck; Gloria Patricia Galindo Vanegas [Infraserv GmbH & Co. Hoechst KG, Frankfurt am Main (Germany)

    2010-06-01

    In this work the enhancement of ammonia adsorption on activated coke has been investigated to increase the efficiency of the denitrification in the dry flue gas cleaning system located at Infraserv GmbH & Co. Hoechst KG in Frankfurt am Main, Germany. The influence of loading temperatures and sulfur components content of the activated coke on the ammonia adsorption were studied. Additionally, urea was tested as an alternative loading substance. Increasing ammonia adsorption was observed by raising loading temperatures. The highest ammonia loading was possible at the highest temperature tested at 469{sup o}C. The activated coke loaded at these conditions, as well as the one loaded with urea, was found to have higher denitrification efficiency than that loaded at present conditions of about 114{sup o}C. The results of this study allowed the recommendation of possible measures to be applied in the plant to increase its denitrification efficiency.

  14. Investigation of coagulation activity of natural coagulants from seeds of different leguminose species

    Directory of Open Access Journals (Sweden)

    Šćiban Marina B.

    2005-01-01

    Full Text Available The ability of seeds of plants: Phaseolus vulgaris, Robinia pseudoacacia Ceratonia siliqua and Amorpha fruticosa, to act as natural coagulants was tested using synthetic turbid water. This water was prepared by adding kaolin into tap water, just before the test. Active components were extracted from ground seeds with distilled water. The coagulation ability of this extract was assessed by the use of standard jar test measurements in water with various initial turbidity. Investigation of these natural coagulants was confirmed their positive coagulation activity. Of all plants that have been examined, the seed extract from Ceratonia siliqua appeared to be one of the most effective coagulants for water treatment. A dose of 20 mg/l of this coagulant resulted in 100% coagulation activity for clarification of water with 17.5 NTU initial turbidity.

  15. Experimental Investigation of Active Noise Controller for Internal Combustion Engine Exhaust System

    Science.gov (United States)

    Wu, Jian-Da; Chen, Chih-Keng; Lee, Chun-Ying; Lee, Tian-Hua

    2002-10-01

    Two active noise control (ANC) algorithms for internal combustion engine exhaust systems are developed and their performances are compared in various experiments. The first controller is based on the filtered-x least mean square (FXLMS) algorithm with feedback neutralization, while the second is a fixed controller with a gain-scheduled active control technique for broadband attenuation with thermal effects. Both control algorithms are implemented on a digital signal processing (DSP) platform. Experiments are carried out to evaluate the attenuation performance of the proposed active noise control systems for an engine exhaust system. The results of the experiments indicate that both the adaptive controller and the gain-scheduled controller effectively suppress the noise of engine exhaust systems. The experimental comparison and analysis of the proposed controllers are also described.

  16. Investigating regulatory signatures of human autophagy related gene 5 (ATG5 through functional in silico analysis

    Directory of Open Access Journals (Sweden)

    Avni Vij

    2016-09-01

    Full Text Available Autophagy is an essential, homeostatic process which removes damaged cellular proteins and organelles for cellular renewal. ATG5, a part of E3 ubiquitin ligase-like complex (Atg12-Atg5/Atg16L1, is a key regulator involved in autophagosome formation - a crucial phase of autophagy. In this study, we used different in silico methods for comprehensive analysis of ATG5 to investigate its less explored regulatory activity. We have predicted various physico-chemical parameters and two possible transmembrane models that helped in exposing its functional regions. Twenty four PTM sites and 44 TFBS were identified which could be targeted to modulate the autophagy pathway. Furthermore, LD analysis identified 3 blocks of genotyped SNPs and 2 deleterious nsSNPs that may have damaging impact on protein function and thus could be employed for carrying genome-wide association studies. In conclusion, the information obtained in this study could be helpful for better understanding of regulatory roles of ATG5 and provides a base for its implication in population-based studies.

  17. Rapid radiochemical separations in neutron activation analysis

    International Nuclear Information System (INIS)

    Rapid radiochemical separation procedures based on the removal of metal ions by columns of C18-bonded silica gel after selective complexation are examined and the simplicity of the method demonstrated by its application to the determination of Mn, Cu and Zn in neutron-activated biological material. The method is rapid and reliable and readily adaptable in all radiochemical laboratories. An alternative separation procedure for selenium in blood plasma involving desalination and concentration of the selenium protein complex by gel filtration or ultrafiltration is briefly discussed. (author)

  18. Active vision in satellite scene analysis

    Science.gov (United States)

    Naillon, Martine

    1994-01-01

    In earth observation or planetary exploration it is necessary to have more and, more autonomous systems, able to adapt to unpredictable situations. This imposes the use, in artificial systems, of new concepts in cognition, based on the fact that perception should not be separated from recognition and decision making levels. This means that low level signal processing (perception level) should interact with symbolic and high level processing (decision level). This paper is going to describe the new concept of active vision, implemented in Distributed Artificial Intelligence by Dassault Aviation following a 'structuralist' principle. An application to spatial image interpretation is given, oriented toward flexible robotics.

  19. Segmentation of visitors to shopping centers based on their activities through factor analysis and cluster analysis

    Directory of Open Access Journals (Sweden)

    reza soleymani-damaneh

    2013-08-01

    Full Text Available Knowing customers of shopping centers contributes greatly to increase profits of these centers. Segmentation of the customers is one of the most effective means of knowing the customers. The purpose of this study was to present a segmentation of the customers based on their activities in the shopping centers. The participants were 157 visitors to Milad-e-Noor Shopping Center who were required to answer the questions in the questionnaire. Data were analyzed in three steps. Through the use of factor analysis, in the first step, the number of variables was reduced to the four factors of entertainment activities, planned shopping, shopping information gathering and unplanned shopping. These factors were then inserted into K-mean cluster analysis and, in the second step and the visitors were divided into 4 segments on the basis of their activity as following: traditionalists, shopping center enthusiasts, wandering customers, and entertainment seekers. In the third step, the demographic and behavioral variables were investigated in the identified clusters. Considering the variables of age, academic status and accompanying persons in shopping centers, these clusters were significantly different. In respect to variables of sex, marital status, the length of presence in the shopping centers, occupations and monthly salary they were recognized as homogenous, however.

  20. Developing Digital, Computational and Social Competencies through Investigative On-Line Activities

    Directory of Open Access Journals (Sweden)

    Zoltan GALIK

    2009-09-01

    Full Text Available Internet and its services have become inherent element of the lives of young people. Nevertheless, we observe that educational potential, which the Internet offers for supporting learning processes, is acknowledged and exploited only partially. On that account, for several years we have been involved in developing investigative on-line activities, highly popular interactive events among students of the Slovak schools. In this way, as a value-added benefit, we have created unique opportunity for us to study how students behave when solving problems in the technology enhanced learning situations, how they communicate and cooperate in the teams, which competencies they cultivate. For such educational research, we have made use of the thoroughly projected combination of the intervention design and qualitative non-participant unstructured observations - within the framework of the design-based research methodology.In this paper we present our initial assumptions and inspirations, methods of our research work and major observations, we clarify what investigative on-line activities are and how we have collected and analyzed data obtained by observing students while solving the investigative tasks. In our research we have focused on the development of three classes of competencies, namely digital competencies (i.e., those that pertain to the area of general digital literacy, computational competencies (i.e., those that correspond to the goals of informatics in education and social competencies (i.e., those that allow students to communicate, cooperate, create or evaluate their own doings, learning etc.. In our paper we present corresponding observations and also attitudes and reactions of the teachers - who have been involved merely as supervisors, not as members of the teams. We also summarise potential contribution of our investigative on-line activities to education in the modern society.

  1. An Item Analysis and Validity Investigation of Bender Visual Motor Gestalt Test Score Items

    Science.gov (United States)

    Lambert, Nadine M.

    1971-01-01

    This investigation attempted to demonstrate the utility of standard item analysis procedures for selecting the most reliable and valid items for scoring Bender Visual Motor Gestalt Test test records. (Author)

  2. Evaluating the Role of Time in Investigative Analysis of Document Collections.

    Science.gov (United States)

    Kwon, Bum chul; Javed, Waqas; Ghani, Sohaib; Elmqvist, Niklas; Yi, Ji Soo; Ebert, David S

    2012-11-01

    Time is a universal and essential aspect of data in any investigative analysis. It helps analysts establish causality, build storylines from evidence, and reject infeasible hypotheses. For this reason, many investigative analysis tools provide visual representations designed for making sense of temporal data. However, the field of visual analytics still needs more evidence explaining how temporal visualization actually aids the analysis process, as well as design recommendations for how to build these visualizations. To fill this gap, we conducted an insight-based qualitative study to investigate the influence of temporal visualization on investigative analysis. We found that visualizing temporal information helped participants externalize chains of events. Another contribution of our work is the lightweight evaluation approach used to collect, visualize, and analyze insight.

  3. Physiological investigation of automobile driver's activation index using simulated monotonous driving.

    Science.gov (United States)

    Yamakoshi, T; Yamakoshi, K; Tanaka, S; Nogawa, M; Kusakabe, M; Kusumi, M; Tanida, K

    2004-01-01

    Monotonous automobile operation in our daily life may cause the lowering of what might be termed an activation state of the human body, resulting in an increased risk of an accident. We therefore propose to create a more suitable environment in-car so as to allow active operation of the vehicle, hopefully thus avoiding potentially dangerous situations during driving. In order to develop such an activation method as a final goal, we have firstly focused on the acquisition of physiological variables, including cardiovascular parameters, during presentation to the driver of a monotonous screen image, simulating autonomous travel of constant-speed on a motorway. Subsequently, we investigated the derivation of a driver's activation index. During the screen image presentation, a momentary electrical stimulation of about 1 second duration was involuntarily applied to a subject's shoulder to obtain a physiological response. We have successfully monitored various physiological variables during the image presentation, and results suggest that a peculiar pattern in the beat-by-beat change of blood pressure in response to the involuntary stimulus may be an appropriate, and feasible, index relevant to activation state.

  4. Investigation of Antibacterial Activity of Two Kinds of Novel Schiff Bases on Escherichia coli by Microcalorimetry

    Institute of Scientific and Technical Information of China (English)

    ZHU Jun-Cheng; LIU Yi; WONG Wai-Kwok; ZHOU Bo; YIN Jun

    2006-01-01

    The microcalorimetric method was used to study the antibacterial activity of two newly synthesized Schiff base compounds (H2L3' and H2L3) on Escherichia coli, trying to obtain the action on both of multiplying bacteria and non-multiplying bacteria at one experiment. The metabolic power-time curves of the bacteria treated with the compounds were obtained, and the thermokinetic parameters were analyzed, from which the antibacterial activities of these compounds were evaluated. The results showed that both of the two compounds have good activity on aerobic multiplying metabolism of E. coli, with the value of IC50 75.8 and 168.8 mg/L respectively, but have not effective action on fermentation metabolism of E. coli. The action of the compounds on the non-multiplying metabolism was investigated by taking the heat output of E. coli in the stationary phase as the guideline of the activity. The value of MSC50 (minimum stationary-cidal concentration 50) of them is 118 and 187.5 mg/L, respectively. So, H2L3' has stronger antibacterial action on E. coli than H2L3 either for multiplying bacteria or non-multiplying bacteria, and their activity on the aerobic multiplying bacteria of E. coli is mainly shown. It does strongly suggest that the calorimetric method should play an important role in the fight against the drug-resistant bacteria.

  5. Investigation of Cytocidal Activity of Bacillus Thuringiensis Parasporal Toxin on CCRF-CEM Cell Line

    Directory of Open Access Journals (Sweden)

    Elham Moazamian

    2013-03-01

    Full Text Available Background & Objective: Parasporin is a parasporal protein of Bacillus thuringiensis and exhibits special cytocidal activity against human cancer cells. Similar to other insecticidal Bacillus thuringiensis crystal toxins, parasporin shows target specificity and damages the cellular membrane. In this study, different strains of Bacillus thuringiensis isolated from various regions of Iran and their cytocidal activity against CCRF-CEM cell line and human erythrocyte were investigated.   Materials & Methods: Fifty soil samples were collected from different Iranian provinces, and characterization was performed based on protein crystal morphology by phase-contrast microscope and variations of Cry protein toxin using SDS-PAGE. After parasporin was processed with proteinase K, the active form was produced and protein activity on the cell line was evaluated. Results: Parasporal inclusion proteins showed different cytotoxicity against acute lymphoblastic leukemia cells (ALL, but not against normal lymphocyte. Isolated parasporin demonstrated no hemolytic activity against human erythrocyte. It appears that these proteins have the ability to differentiate between normal lymphocytes and leukemia cells and have specific receptors on specific cancer cell lines. Conclusion: Our results provide evidence that the parasporin-producing organism is a common member in Bacillus thuringiensis populations occurring in the natural environments of Iran.

  6. Natural male contraceptive: phytochemical investigation and anti-spermatogenic activity of Pistia stratiotes Linn.

    Science.gov (United States)

    Singh, Kiran; Dubey, Bidhyut Kumar; Tripathi, Avinash C; Singh, Ajeet Pal; Saraf, Shailendra K

    2014-01-01

    This work is an attempt to explore the anti-spermatogenic activity of Pistia stratiotes and to investigate it as a male contraceptive. The prepared extracts were screened for the presence of alkaloids, glycosides, steroids, flavonoids, saponin and phenolic compounds. To assess the anti-spermatogenic activity, mice were orally administered with the various extracts of P. stratiotes (dose: 100 and 200 mg/kg body weight/day, for 45 days) and the most active, ethanolic extract was subjected to the isolation of phytoconstituent responsible for the activity. Diethyl ether fraction of ethanolic extract was taken to isolate a saponin, sitosterol-3-O-[2,4-di-O-acetyl-6-O-stearyl-β-D-glucopyranoside]. Anti-spermatogenic activity of the isolated saponin was evaluated at a dose of 50 mg/kg body weight/day, for 45 days. The treatment caused significant decrease (P < 0.01) in the weight of reproductive organs (testis, epididymis and seminal vesicle). The sperm count, sperm viability and serum testosterone levels were significantly lowered compared with that of the control group.

  7. Investigation of Cadmium (II Ions Biosorption onto Pretreated Dried Activated Sludge

    Directory of Open Access Journals (Sweden)

    R. D.C. Soltani

    2009-01-01

    Full Text Available Problem statement: Heavy metals have been one of hazardous components in industrial effluents that can be damaged on the environment by discharging uncontrolled wastewater. The aims of this investigation were biosorption of Cd (II ions onto pretreated dried activated sludge and determination of kinetic and isotherm of biosorption. Approach: Activated sludge was obtained from Tehran municipal wastewater treatment plant. Activated Sludge was dried and used for biosorbtion of Cd (II ions from aqueous solution. Dried Activated Sluge (DAS was pretreated with three different solutions (H2O2, NaOH and ethanol. Biosorption capacity of different types of DAS to remove Cd (II ions was investigated as a function of Cd (II concentrations at variable initial Cd (II concentrations between 10 and 500 mg L−1 with a DAS particle size 0.2-0.3 mm using batch biosorption experiments. Results: Biosorption of Cd (II by Dried Activated Sludge (DAS was found to perform better than the others after pretreatment with H2O2. The maximum biosorption capacity was given 256.41, 217.39, 212.77 and 204.08 mg g−1 for the H2O2, NaOH; Ethanol pretreated and untreated DAS, respectively. The pseudo-second order kinetic model was found to be more suitable than the pseudo-first order kinetic model to correlate the experimental data for all types of DAS (R2>0.9. The Freundlich isotherm was found to fit the experimental data slightly better than the Langmuir isotherm model for all pretreated and untreated DAS (R2>0.99. Conclusion: It can be concluded that pretreatment DAS yield higher Cd (II biosorption capacity, especially DAS that pretreated with H2O2.

  8. Investigations on the estrogenic activity of the metallohormone cadmium in the rat intestine

    Energy Technology Data Exchange (ETDEWEB)

    Hoefer, Nicola; Kluxen, Felix M. [German Sports University Cologne, Institute of Cardiovascular Research and Sports Medicine, Department of Molecular and Cellular Sports Medicine, Koeln (Germany); IfADo - Leibniz Research Centre for Working Environment and Human Factors at the TU Dortmund, Dortmund (Germany); Diel, Patrick [German Sports University Cologne, Institute of Cardiovascular Research and Sports Medicine, Department of Molecular and Cellular Sports Medicine, Koeln (Germany); Wittsiepe, Juergen; Wilhelm, Michael [Ruhr-University Bochum, Department of Hygiene, Social- and Environmental Medicine, Bochum (Germany); Degen, Gisela H. [IfADo - Leibniz Research Centre for Working Environment and Human Factors at the TU Dortmund, Dortmund (Germany)

    2010-07-15

    Cadmium (Cd), a toxic heavy metal and an important environmental pollutant, is now also regarded as potential endocrine disruptor. Its estrogenic effects have been examined so far just in classical target tissues, e.g. uterus, and mostly upon intraperitoneal (i.p.) injection of CdCl{sub 2}. Yet, estrogen receptors are also expressed in the gut, and food is the main source of cadmium intake in the general population. Therefore, possible estrogenic effects were now investigated in the intestine of ovariectomized Wistar rats after oral short- and long-term administration of CdCl{sub 2} (0.05-4 mg/kg bw on 3 days by gavage and 0.4-9 mg/kg bw for 4 weeks in drinking water) or upon i.p. injection (0.00005-2 mg CdCl{sub 2}/kg bw), and compared to steroid estrogen (estradiol or ethinylestradiol) treated groups. Analysis of Cd in kidneys and small intestine by atomic absorption spectrometry showed dose-dependent increases in tissue levels with rather high Cd concentrations in the gut, both after oral and i.p. administration. Expression of metallothionein (MT1a), a typical metal response parameter, was clearly induced in kidney and small intestine of several CdCl{sub 2} treated groups, but also notably increased by steroid estrogens. Levels of estrogen-regulated genes, i.e. pS2/TFF1, vitamin D receptor (VDR), and estrogen receptor {alpha} and {beta} (ER {alpha}/{beta}) were studied as parameters of hormonal activity: The intestinal mRNA expression of pS2/TFF1 was significantly decreased in the estrogen reference groups, but also after single i.p. injection and oral long-term administration of CdCl{sub 2}. In contrast, the mRNA and protein expression of the VDR were unaffected by long-term administration of Cd via drinking water. We detected expression of ER{beta}, but not ER{alpha} in the small intestine of OVX rats. ER{beta} mRNA and protein expression were significantly down-regulated by Cd, similar to the ethinylestradiol reference group. The mRNA expression and

  9. A statistical analysis of electrical cerebral activity

    International Nuclear Information System (INIS)

    The aim of this work was to study the statistical properties of the amplitude of the electroencephalographic signal. The experimental method is described (implantation of electrodes, acquisition and treatment of data). The program of the mathematical analysis is given (calculation of probability density functions, study of stationarity) and the validity of the tests discussed. The results concerned ten rabbits. Trips of EEG were sampled during 40 s. with very short intervals (500 μs). The probability density functions established for different brain structures (especially the dorsal hippocampus) and areas, were compared during sleep, arousal and visual stimulus. Using a Χ2 test, it was found that the Gaussian distribution assumption was rejected in 96.7 per cent of the cases. For a given physiological state, there was no mathematical reason to reject the assumption of stationarity (in 96 per cent of the cases). (author)

  10. Mathematical analysis of complex cellular activity

    CERN Document Server

    Bertram, Richard; Teka, Wondimu; Vo, Theodore; Wechselberger, Martin; Kirk, Vivien; Sneyd, James

    2015-01-01

    This book contains two review articles on mathematical physiology that deal with closely related topics but were written and can be read independently. The first article reviews the basic theory of calcium oscillations (common to almost all cell types), including spatio-temporal behaviors such as waves. The second article uses, and expands on, much of this basic theory to show how the interaction of cytosolic calcium oscillators with membrane ion channels can result in highly complex patterns of electrical spiking. Through these examples one can see clearly how multiple oscillatory processes interact within a cell, and how mathematical methods can be used to understand such interactions better. The two reviews provide excellent examples of how mathematics and physiology can learn from each other, and work jointly towards a better understanding of complex cellular processes. Review 1: Richard Bertram, Joel Tabak, Wondimu Teka, Theodore Vo, Martin Wechselberger: Geometric Singular Perturbation Analysis of Burst...

  11. TO THE QUESTION OF PRIVATE THEORIES IN OPERATIVE-INVESTIGATIVE SCIENCE: THEORY OF OPERATIVE AND INVESTIGATIVE ACTIVITIES AGAINST ETHNIC CRIME

    OpenAIRE

    A. N. Pozdnyakov

    2016-01-01

    The questions related to the state and prospects of development of оперативно-разыскной science are examined in the article. About her becoming talks circumstance that within the framework of theory of operatively-search activity the row of private theories is already worked (set forth) out : organization of operatively-search activity on a fight against the organized crime, theory of the personal searchand other. It contingently that in basis operatively-search sciences are stopped up compon...

  12. Diagnosis of mucoviscidosis by neutron activation analysis. Part 1

    International Nuclear Information System (INIS)

    Symptoms pathology, incidence, and gravity of the inherent syndrome called mucoviscidosis, or cystic fibrosis are described in this Part I. The analytical methods used for its diagnosis, both the conventional chemical ones and by neutron activation analysis are also summarised. Finally, an analytical method to study the incidence of mucoviscidosis in Brazil is presented. This , essentially, consists in bromine determination, in fingernails, by resonance neutron activation analysis. (author)

  13. Thermal analysis of activated carbons modified with silver metavanadate

    Energy Technology Data Exchange (ETDEWEB)

    Goscianska, Joanna; Nowicki, Piotr; Nowak, Izabela [Faculty of Chemistry, Adam Mickiewicz University in Poznan, Grunwaldzka 6, 60-780 Poznan (Poland); Pietrzak, Robert, E-mail: pietrob@amu.edu.pl [Faculty of Chemistry, Adam Mickiewicz University in Poznan, Grunwaldzka 6, 60-780 Poznan (Poland)

    2012-08-10

    Highlights: Black-Right-Pointing-Pointer Preparation of the activated carbons from waste materials as new supports for AgVO{sub 3}. Black-Right-Pointing-Pointer Decomposition of AgVO{sub 3} to V{sub 2}O{sub 5} and Ag{sup 0} for the samples 1 and 3 wt.% Ag-V is observed. Black-Right-Pointing-Pointer Samples containing 5 wt.% Ag-V decompose to vanadyl species as intermediate compounds. - Abstract: The effect of silver metavanadate doping on physicochemical properties and thermal behaviour of the activated carbons obtained from waste materials was investigated. The carbonaceous supports were subjected to carbonisation at 400 or 600 Degree-Sign C. The samples carbonised at 600 Degree-Sign C have much more developed surface area and porous structure than the analogous samples obtained at 400 Degree-Sign C. Impregnation of activated carbons with silver metavanadate leads to a decrease in their surface area and pore volume. According to thermal analysis (TG, DTG) in the samples containing 1 and 3 wt.% of silver metavanadate, AgVO{sub 3} is fully decomposed to do vanadium oxide and Ag, with no intermediate products, while in the samples containing 5 wt.% AgVO{sub 3}, this salt is decomposed to vanadyl species as intermediate compounds at 350 Degree-Sign C before the formation of V{sub 2}O{sub 5} at 500 Degree-Sign C. Moreover, in all samples impregnated with silver metavanadate the nanoparticles of silver undergo crystallisation leading to reduction of Ag{sup +} ions from the vanadium salt to Ag{sup 0}.

  14. The struggle for individuality: Investigating a long-term pursuit of a lifestyle sport activity

    Directory of Open Access Journals (Sweden)

    Jana Hoffmannová

    2016-06-01

    Full Text Available Background: Mainstream forms of media frequently portray "wild" or "epic" images of lifestyle sport activities showing the participants as "modern-day gladiators". This research set out to explore how closely aligned these stereotypes are with individual experiences. Objective: The purpose of this study was to identify and analyze factors which may contribute to a selected lifestyle sport activity becoming firmly rooted in an individual's life course. Methods: Data were collected through focus groups, individual interviews, lifeline method, and participant observation within focus groups. The sample included performance freeskiers, freestyle snowboard riders and instructors (N = 19. Grounded theory was used for analysis and interpretation of data. Results: Results from this research indicate traditional deterministic images of a sport career in freeskiing and freestyle snowboarding do not match the views and beliefs of the actual participants in these activities. Conclusions: The study examines the careers of long-term participants in freeskiing and freestyle snowboarding and extends existing knowledge of lifestyle sports through the implementation of the lifespan approach. Recommendations for future research include extending the analysis to include sports recently considered mainstream as the distinction (between mainstream and lifestyle sports is becoming increasingly complicated.

  15. Prompt Gamma-Ray Neutron Activation Analysis (PGNAA) for Elemental Analysis

    Energy Technology Data Exchange (ETDEWEB)

    Robin P. Gardner

    2006-04-11

    This research project was to improve the prompt gamma-ray neutron activation analysis (PGNAA) measurement approach for bulk analysis, oil well logging, and small sample thermal enutron bean applications.

  16. Multifractal detrended fluctuation analysis of human EEG: preliminary investigation and comparison with the wavelet transform modulus maxima technique.

    Directory of Open Access Journals (Sweden)

    Todd Zorick

    Full Text Available Recently, many lines of investigation in neuroscience and statistical physics have converged to raise the hypothesis that the underlying pattern of neuronal activation which results in electroencephalography (EEG signals is nonlinear, with self-affine dynamics, while scalp-recorded EEG signals themselves are nonstationary. Therefore, traditional methods of EEG analysis may miss many properties inherent in such signals. Similarly, fractal analysis of EEG signals has shown scaling behaviors that may not be consistent with pure monofractal processes. In this study, we hypothesized that scalp-recorded human EEG signals may be better modeled as an underlying multifractal process. We utilized the Physionet online database, a publicly available database of human EEG signals as a standardized reference database for this study. Herein, we report the use of multifractal detrended fluctuation analysis on human EEG signals derived from waking and different sleep stages, and show evidence that supports the use of multifractal methods. Next, we compare multifractal detrended fluctuation analysis to a previously published multifractal technique, wavelet transform modulus maxima, using EEG signals from waking and sleep, and demonstrate that multifractal detrended fluctuation analysis has lower indices of variability. Finally, we report a preliminary investigation into the use of multifractal detrended fluctuation analysis as a pattern classification technique on human EEG signals from waking and different sleep stages, and demonstrate its potential utility for automatic classification of different states of consciousness. Therefore, multifractal detrended fluctuation analysis may be a useful pattern classification technique to distinguish among different states of brain function.

  17. ANALYSIS OF ECOLOGICAL ACTIVITY OF PODLASIE PROVINCE

    Directory of Open Access Journals (Sweden)

    Agnieszka Kisło

    2014-01-01

    Full Text Available The beginning of the period where the impact of human activity took dangerous size is considered to be 40 years of the nineteenth century. Then the large-scale production of electricity increased production of metallurgical industry and transport development. Significant changes contributed to rapid population growth and urbanization and industrialization processes. Man by intensive exploitation reduces or completely exhausted most natural resources. This has resulted in the availability criterion, which is distinguished by inexhaustible and exhaustible resources. Exhaustible resources may include solar, wind, energy, ocean currents and the energy of the Earth. Exhaustible resources, however, are the elements of nature that as a result of the operation can be completely depleted or destroyed. These resources include: water, soil, plant world, animal world natural resources. The greater the intensity of acquiring human resources, the faster will be the depleted. There is also a very important division of exhaustible resources: non-renewable resources, renewable and very difficult reproducible (living areas. Non-renewable resources are mainly minerals, such as iron ore, crude oil, coal, sulfur, natural gas, useful stones, limestone, salt, and many other minerals. After extraction resources are processed, and the bed from which they were extracted can no longer be used. It is different from renewable resources; they are characterized by the fact that over time they are reconstituted, although, for this to happen balance of the environment through the rational use must be maintained. These resources include, among others, soil, water, flora and fauna, as well as atmospheric air.

  18. Analysis of supercooling activities of surfactants.

    Science.gov (United States)

    Kuwabara, Chikako; Terauchi, Ryuji; Tochigi, Hiroshi; Takaoka, Hisao; Arakawa, Keita; Fujikawa, Seizo

    2014-08-01

    Supercooling-promoting activities (SCAs) of 25 kinds of surfactants including non-ionic, anionic, cationic and amphoteric types were examined in solutions (buffered Milli-Q water, BMQW) containing the ice nucleation bacterium (INB) Erwinia ananas, silver iodide (AgI) or BMQW alone, which unintentionally contained unidentified ice nucleators, by a droplet freezing assay. Most of the surfactants exhibited SCA in solutions containing AgI but not in solutions containing the INB E. ananas or BMQW alone. SCAs of many surfactants in solutions containing AgI were very high compared with those of previously reported supercooling-promoting substances. Cationic surfactants, hexadecyltrimethylammonium bromide (C16TAB) and hexadecyltrimethylammonium chloride (C16TAC), at concentrations of 0.01% (w/v) exhibited SCA of 11.8 °C, which is the highest SCA so far reported. These surfactants also showed high SCAs at very low concentrations in solutions containing AgI. C16TAB exhibited SCA of 5.7 °C at a concentration of 0.0005% (w/v). PMID:24792543

  19. Investigating the Application of Needs Analysis on EAP Business Administration Materials

    Science.gov (United States)

    Mohammed, Saifalislam Abdalla Hajahmed

    2016-01-01

    This study is conducted to investigate the application of needs analysis in developing EAP materials for business administration students in two Sudanese universities. The subjects are 2 head departments of English language. To collect data, the researcher uses interview and content analysis. The study adopts the descriptive approach. The data of…

  20. Geological, geophysical investigations and seismotectonic analysis with reference to selection of site for nuclear power plants: a review

    International Nuclear Information System (INIS)

    Geological, geophysical investigations and seismotectonic analysis play a major role in qualifying a proposed site for establishment of nuclear power plants. In an area, it is important to understand the aspects such as regional and local geology, geomorphology, tectonic settings, presence of active faults/capable faults, earthquake history and earthquake proneness, neotectonic activity, slope instability, subsidence, liquefaction, seismically induced flooding, tsunami and geohydrological conditions. Geological investigations comprise use of remote sensing and ground validation followed by geological mapping, identification of faults, near surface geological studies for foundation conditions, stratigraphic drilling, palaeoseismology, studies on engineering properties of rock and soil. Geophysical investigations provide insight into subsurface geology including concealed faults, elastic constants and hydrological conditions. Radon emanometry is a valuable tool in the initial stage to decipher subsurface active weak zones/fault lines. Seismotectonic analysis identifies the provinces of tectonic significance and their earthquake potential, thereby designating lineaments of consequence leading to their evaluation. This, in turn, determines the design basis earthquake parameter for the estimation of vibratory ground motion. This article provides certain measures to evaluate the suitability of the sites for the establishment of nuclear power plants in terms of geological, geophysical investigations and seismotectonic status. Atomic Minerals Directorate for Exploration and Research (AMD) had carried out seismotectonic analysis of the area around Kaiga, Narora, Kalpakkam, Kakrapar, Tarapur, Kudankulam and Rawatbhata Nuclear Power Projects, which were either in operation or under expansion and construction. Such analysis was extended to a number of proposed sites for establishing nuclear power plants in West Bengal, Bihar, Orissa, Andhra Pradesh, Gujrat, Madhya Pradesh

  1. Investigation of structural, dielectric, magnetic and antibacterial activity of Cu–Cd–Ni–FeO{sub 4} nanoparticles

    Energy Technology Data Exchange (ETDEWEB)

    Hashim, Mohd., E-mail: md.hashim09@gmail.com [Department of Applied Physics, Aligarh Muslim University, Aligarh 202 002 (India); Alimuddin [Department of Applied Physics, Aligarh Muslim University, Aligarh 202 002 (India); Shirsath, Sagar E. [Spin Device Technology Centre, Department of Information Engineering, Shinshu University, Nagano 380-8553 (Japan); Meena, S.S. [Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085 (India); Kotnala, R.K. [National Physical Laboratory (CSIR), Dr. K.S. Krishnan Road, New Delhi 110012 (India); Parveen, Ameena [Department of Physics, Government First Grade College, Gurmitkal 585214, Yadgir, Karnataka (India); Roy, Aashis S. [Department of Materials Science, Gulbarga University, Gulbarga - 585106, Karnataka (India); Kumar, Shalendra [Department of Physics, Pohang University of Science and Technology, Pohang 790-784 (Korea, Republic of); Bhatt, Pramod [Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085 (India); Kumar, Ravi [Centre for Material Science and Engineering, National Institute of Technology, Hamirpur 171 005, HP (India)

    2013-09-15

    Nanoparticles of Cu–Cd–Ni–FeO{sub 4} were synthesized by the auto-combustion process using a modified citric acid method. Antibacterial activity, structural, dielectric and magnetic properties were investigated. An assay showed the broad spectrum antibacterial activity of Cu–Cd–Ni–FeO{sub 4} against Gram positive and Gram negative pathogenic bacterial strains. The existence of single phase cubic spinel structure of ferrites was confirmed by X-ray diffraction measurement. Fourier transform infrared spectroscopy shows the two main absorption bands at lower frequency region. Surface morphology and compositional features were studied by scanning electron microscopy and energy dispersive X-ray spectroscopy analysis, respectively. Results indicated that the nanosize particles greatly influenced the antibacterial activity, as well as structural, dielectric and magnetic properties of the samples. Magnetic measurements of the samples were carried out by means of vibrating sample magnetometry and Mössbauer spectroscopy. Magnetic properties are strongly affected by Ni{sup 2+} substitution. - Highlights: • Ni{sup 2+} substituted Cu–Cd–FeO NPs. • Rietveld refinement and IR study confirm the Cu–Cd–FeO in spinel phase. • Magnetization increased with Ni{sup 2+} substitution. • Magnetic parameters by Mössbauer measurements. • Antibacterial activities of Cu–Cd–Ni–FeO NPs.

  2. Using Video Analysis to Investigate Conservation Impulse and Mechanical Energy Laws

    OpenAIRE

    Aleksandrova, Aleksandrija; Nancheva, Nadezhda

    2008-01-01

    Video analysis provides an educational, motivating, and cost-effective alternative to traditional course- related activities in physics education. Our paper presents results from video analysis of experiments “Collision of balls” and “Motion of a ball rolled on inclined plane” as examples to illustrate the laws of conservation of impulse and mechanical energy.

  3. An investigation of multiple time graphical analysis applied to projection data : Theory and validation

    NARCIS (Netherlands)

    Maguire, RP; Calonder, C; Leenders, KL

    1997-01-01

    Purpose: The determination of tissue time-activity course and pharmokinetics in PET is normally performed by region-of-interest analysis of reconstructed images. However, in some cases, the same analysis may equally well be performed on the data in projections before reconstruction, avoiding the rec

  4. Theoretical and Experimental Investigation of Force Estimation Errors Using Active Magnetic Bearings with Embedded Hall Sensors

    DEFF Research Database (Denmark)

    Voigt, Andreas Jauernik; Santos, Ilmar

    2012-01-01

    This paper gives an original theoretical and experimental contribution to the issue of reducing force estimation errors, which arise when applying Active Magnetic Bearings (AMBs) with pole embedded Hall sensors for force quantification purposes. Motivated by the prospect of increasing the usability...... of AMBs by embedding Hall sensors instead of mounting these directly on the pole surfaces, force estimation errors are investigated both numerically and experimentally. A linearized version of the conventionally applied quadratic correspondence between measured Hall voltage and applied AMB force...... for pole embedded and pole surface mounted Hall sensors. It is shown that in a given range of bias currents and rotor offsets, pole embedded and surface mounted Hall sensors perform equally well for the four pole heteropolar flux-split radial AMB under investigation. Furthermore, frequency dependence...

  5. Investigating real-time activation of adenosine receptors by bioluminescence resonance energy transfer technique

    Science.gov (United States)

    Huang, Yimei; Yang, Hongqin; Zheng, Liqin; Chen, Jiangxu; Wang, Yuhua; Li, Hui; Xie, Shusen

    2013-02-01

    Adenosine receptors play important roles in many physiological and pathological processes, for example regulating myocardial oxygen consumption and the release of neurotransmitters. The activations of adenosine receptors have been studied by some kinds of techniques, such as western blot, immunohistochemistry, etc. However, these techniques cannot reveal the dynamical response of adenosine receptors under stimulation. In this paper, bioluminescence resonance energy transfer technique was introduced to study the real-time activation of adenosine receptors by monitoring the dynamics of cyclic adenosine monophosphate (cAMP) level. The results showed that there were significant differences between adenosine receptors on real-time responses under stimulation. Moreover, the dynamics of cAMP level demonstrated that competition between adenosine receptors existed. Taken together, our study indicates that monitoring the dynamics of cAMP level using bioluminescence resonance energy transfer technique could be one potential approach to investigate the mechanism of competitions between adenosine receptors.

  6. Catecholase activity investigations using in situ copper complexes continuing Schiff base derivatives with a theoretical calculation

    Directory of Open Access Journals (Sweden)

    A. Djedouani

    2015-03-01

    Full Text Available The study of catecholase activity of a series of Schiff base compounds using in situ copper complexes of 4-hydroxy-6-methyl-3-(1-(phenyliminoethyl-2H-pyran-2-one derivatives has been reported. The reaction rate depends on four parameters: The nature of the substitution in para position to the benzene ring, the nature of counter anion, the concentration of ligand and the nature of solvent. The highest rate activity is given by complex resulting from one equivalent of ligand L2 and two equivalents of copper acetate in methanol, which equal to 62.25 µmol.min-1.L-1.In other part, a theoretical study of such ligands using the semi-empirical method AM1 were also investigated. A good relationship founded between the maximal reaction rate (Vmax and the HOMO energy (Pearson correlation: r=-0.794.

  7. Investigation of environmental activity levels of bone-coal mining area in five provinces

    International Nuclear Information System (INIS)

    During 1991-1993, the activity levels of the bone-coal mines were investigated in Zhejiang, Hubei, Hunan, Jiangxi and Anhui Province, respectively, where the reserve of bone-coal is about 90% of our country's total reserve. The average of γ radiation dose rate level measured for bone-coal, bone-coal cinder (BCC) and bone-coal cinder brick (BCCB) in these provinces is about 500 nGy/h, 400 nGy/h and 700 nGy/h respectively, while that for fields, roads and houses made of BCCB in corresponding regions of these provinces is about 200 nGy/h, 260 nGy/h and 300 nGy/h respectively. It is shown that the environmental activity level of bone-coal mining area is about 3 times higher than the reference spots. (authors)

  8. Investigation of photocalalytic activity of ZnO prepared by spray pyrolis with various precursors

    Science.gov (United States)

    Bourfaa, F.; Lamri Zeggar, M.; A, A.; Aida, M. S.; Attaf, N.

    2016-03-01

    Semiconductor photocatalysts such as ZnO has attracted much attention in recent years due to their various applications for the degradation of organic pollutants in water, air and in dye sensitized photovoltaic solar cell. In the present work, ZnO thin films were prepared by ultrasonic spray pyrolysis by using different precursors namely: acetate, chloride and zinc nitrate in order to investigate their influence on ZnO photocatalytic activity. The films crystalline structure was studied by mean of X- ray diffraction measurements (XRD) and the films surface morphology by Scanning Electron Microscopy (SEM). The films optical properties were studied by mean of UV-visible spectroscopy. The prepared films were tested for the degradation of the red reactive dye largely used in textile industry. As a result, we found that the zinc nitrate is the best precursor to prepare ZnO thin films suitable for a good photocatalytic activity.

  9. Investigation of environmental activity levels of bone-coal mining area in five provinces

    Institute of Scientific and Technical Information of China (English)

    YE Ji-Da; KONG Ling-Li; LI Ying; JIANG Shan; ZHANG Liang; SHI Jin-Hua; WU Zong-Mei

    2005-01-01

    During 1991-1993,the activity levels of the bone-coal mines were investigated in Zhejiang,Hubei,Hunan,Jiangxi and Anhui Province,respectively,where the reserve of bone-coal is about 90% of our country's total reserve.The average of γ radiation doserate level measured for bone-coal, bone-coal cinder (BCC)and bone-coal cinder brick (BCCB) in these provinces is about 500 nGy/h,400 nGy/h and 700 nGy/h respectively, while that for fields,roads and houses made of BCCB in corresponding regions of these provinces is about 200 nGy/h, 260 nGy/h and 300nGy/h respectively.It is shown that the environmental activity level of bone-coal mining area is about 3 times higher than the reference spots.

  10. 影响陕南地区职业女性参与体育锻炼因素的调查与分析%Investigation and Analysis of Factors Influencing Professional Women' s Physical Activity in the Southern Part of Shaanxi Province

    Institute of Scientific and Technical Information of China (English)

    高菲菲

    2012-01-01

    The paper investigates and analyzes the subjective factors, condition factors, social factors about professional women's physical activity in southern Shaanxi Province and gives some suggestions to stimulate women's enthusiasm in physical activities for promoting their physical and mental health and a development of harmonious society.%通过对影响陕南地区职业女性参与体育锻炼的主体因素、条件因素、社会因素的调查与分析,提出激发陕南地区职业女性参与体育锻炼热情的建议,促进她们的身心健康,促进和谐社会的发展。

  11. Spatiotemporal Data Mining, Analysis, and Visualization of Human Activity Data

    Science.gov (United States)

    Li, Xun

    2012-01-01

    This dissertation addresses the research challenge of developing efficient new methods for discovering useful patterns and knowledge in large volumes of electronically collected spatiotemporal activity data. I propose to analyze three types of such spatiotemporal activity data in a methodological framework that integrates spatial analysis, data…

  12. Applying an Activity System to Online Collaborative Group Work Analysis

    Science.gov (United States)

    Choi, Hyungshin; Kang, Myunghee

    2010-01-01

    This study determines whether an activity system provides a systematic framework to analyse collaborative group work. Using an activity system as a unit of analysis, the research examined learner behaviours, conflicting factors and facilitating factors while students engaged in collaborative work via asynchronous computer-mediated communication.…

  13. Performance analysis of active schedules in identical parallel machine

    Institute of Scientific and Technical Information of China (English)

    Changjun WANG; Yugeng XI

    2007-01-01

    Active schedule is one of the most basic and popular concepts in production scheduling research. For identical parallel machine scheduling with jobs' dynamic arrivals, the tight performance bounds of active schedules under the measurement of four popular objectives are respectively given in this paper. Similar analysis method and conclusions can be generalized to static identical parallel machine and single machine scheduling problem.

  14. Chromosome Segmentation and Investigations using Generalized Gradient Vector Flow Active Contours

    Directory of Open Access Journals (Sweden)

    Albert Prabhu Britto

    2005-08-01

    Full Text Available We investigated Generalized Gradient Vector Flow Active Contours as a suitable boundary mapping technique for Chromosome spread images which have variability in shape and size, expecting to yield a robust segmentation scheme that can be used for segmentation of similar class of images based on optimal set of parameter values. It is found experimentally that a unique set of parameter values is required for boundary mapping each chromosome image. Characterization studies have established that each parameter has an optimal range of values within which good boundary mapping results can be obtained in similar class of images. Statistical testing validates the experimental results

  15. Investigation on Harmonic Tuning for Active Ku-Band Rectangular Dielectric Resonator Antennas

    Directory of Open Access Journals (Sweden)

    Anda Guraliuc

    2008-01-01

    Full Text Available A slot-coupled rectangular dielectric resonator antenna (DRA operating in the 14–14.5 GHz frequency band is investigated as a possible radiating element for an active integrated antenna of a transmitting phased array. The effectiveness of the resonator shape factor on achieving harmonic tuning is addressed. Simulation results show that the DRA shape factor can be used to provide a fine tuning of the DRA input impedance both at the fundamental frequency and its first harmonics, so synthesizing the proper load for the optimization of the microwave amplifier power-added efficiency (PAE.

  16. Analysis of domestic dog mitochondrial DNA sequence variation for forensic investigations

    OpenAIRE

    Angleby, Helen

    2005-01-01

    The first method for DNA analysis in forensics was presented in 1985. Since then, the introduction of the polymerase chain reaction (PCR) has rendered possible the analysis of small amounts of DNA and automated sequencing and fragment analysis techniques have facilitated the analyses. In most cases short tandemly repeated regions (STRs) of nuclear DNA are analysed in forensic investigations, but all samples cannot be successfully analysed using this method. For samples containing minute amoun...

  17. Post-Chernobyl investigations of radiocaesium activity concentrations in Adriatic Sea pilchards.

    Science.gov (United States)

    Franić, Zdenko; Petrinec, Branko; Branica, Gina; Marović, Gordana; Kubelka, Dragan; Franić, Zrinka

    2012-08-01

    Investigations in the post-Chernobyl period (1986-2009) of radiocaesium activity concentrations in Adriatic pilchards are presented. Compared with pre-Chernobyl period, the Chernobyl nuclear accident caused increase of (137)Cs activity concentrations in pilchards. By fitting the measured (137)Cs activity concentrations to the theoretical curve was estimated to be 1.5±0.4 y for 1986-90 and 5.8±0.4 y for 1991-2009 and the bimodal behaviour for the ecological half-life of (137)Cs in pilchards has been observed. Estimated annual effective doses received by (134)Cs and (137)Cs intake due to consumption for an adult member of Croatian population are small. Collective dose for the 1986-2009 period was 4.9+0.3 person-Sv. The observed (134)Cs/(137)Cs activity ratio in pilchards was similar to the ratio that has been found in other environmental samples. The concentration factor for pilchards was roughly estimated to be 93.7±39.2 l kg(-1), which is consistent with the values observed elsewhere.

  18. MANAGEMENT OF SCIENTIFIC INVESTIGATIVE ACTIVITY STUDENT OF ECONOMICS POLYTECHNIC INSTITUTES OF CUBA

    Directory of Open Access Journals (Sweden)

    Alba Sánchez Arencibia

    2014-05-01

    Full Text Available With this article, the authors reveal the results of an investigation that sought to address the shortcomings in the performance of students in polytechnics Economics Holguin, Cuba, in scientific-research activity, limiting compliance demands made by society to the Technical and Vocational Education. To do this, a pedagogical model that considers the link between the orientations contextualized scientific-research activity, contextualized systematization of scientific-research activity and its contextual effect transformer whose contextual interaction emerges address provided scientific activity-research, research training to ensure students and improve their performance, in line with social demands. It also provided a methodology that allowed the application, in practice, the pedagogical model, which is published from the joint between stages, phases and actions that correspond to functional logic. These contributions were assessed through criteria expert method and by the partial implementation in the town of Holguin, which made it possible to test the relevance of the model and methodology, as well as the feasibility of the methodology, supported by the favorable consensus of teachers and tutors with regard to their coherence and viability.

  19. Applied research of environmental monitoring using instrumental neutron activation analysis

    Energy Technology Data Exchange (ETDEWEB)

    Chung, Young Sam; Moon, Jong Hwa; Chung, Young Ju

    1997-08-01

    This technical report is written as a guide book for applied research of environmental monitoring using Instrumental Neutron Activation Analysis. The contents are as followings; sampling and sample preparation as a airborne particulate matter, analytical methodologies, data evaluation and interpretation, basic statistical methods of data analysis applied in environmental pollution studies. (author). 23 refs., 7 tabs., 9 figs.

  20. Investigation of biological activity of polar extracts isolated from Phlomis crinita Cav ssp. mauritanica Munby.

    Science.gov (United States)

    Limem-Ben Amor, Ilef; Skandrani, Ines; Boubaker, Jihed; Ben Sghaïer, Mohamed; Neffati, Aicha; Bhouri, Wissem; Bouhlel, Ines; Chouchane, Nabil; Kilani, Soumaya; Guedon, Emmanuel; Ghoul, Mohamed; Ghedira, Kamel; Chekir-Ghedira, Leila

    2009-01-01

    The lyophilized infusion, the methanol, the ethyl acetate, and the total oligomer flavonoid (TOF)-enriched extracts prepared from the dried leaves of Phlomis crinita Cav. ssp. mauritanica Munby were investigated for the contents of flavonoids, tannins, coumarines and steroids. Antibacterial activity was investigated toward five bacterial strains. An inhibitory effect was observed against Staphyllococcus aureus and Enterococcus feacalis, and the minimal inhibitory concentrations ranged from 2.5 to 5 mg/mL of extract. The tested extracts exhibit an important free radical scavenging activity toward the 1,1-diphenyl 2-picrylhydrazyl (DPPH) free radical; with IC(50) values of 30.5, 6, 32, and 31.5 microg/mL, respectively, in the presence of lyophilized infusion, the TOF, the methanol, and the ethyl acetate extracts. Genotoxic and antigenotoxic properties of the different extracts were studied by using the SOS chromotest with Escherichia coli PQ37. The lyophilized infusion and TOF extracts obtained from P. crinita ssp. mauritanica showed no genotoxicity, whereas methanol and ethyl acetate extracts are considered as marginally genotoxic. On the other hand, we showed that each extract inhibited the mutagenicity induced by aflatoxin B1 (AFB1) (10 microg/assay) and nifuroxazide (NF) (10 microg/assay). The ethyl acetate extract showed the strongest level of protection toward the genotoxicity induced by both directly and indirectly genotoxic NF and AFB1. These tests proved that the lyophilized infusion possesses an antiradical activity likewise, it showed no genotoxic effect; that is why we choose this extract to assess its antiulcerogenic activity by using an ethanol-induced ulcerogenesis model in the rat. This test demonstrates that 300 mg/kg of a P. crinita ssp. mauritanica lyophilized infusion was more effective than the reference compound, cimetidine. PMID:19514937

  1. Experimental investigation of the external nitrification biological nutrient removal activated sludge (ENBNRAS) system.

    Science.gov (United States)

    Hu, Zhi-Rong; Sötemann, S; Moodley, R; Wentzel, M C; Ekama, G A

    2003-08-01

    A systematic lab-scale experimental investigation is reported for the external nitrification (EN) biological nutrient removal (BNR) activated sludge (ENBNRAS) system, which is a combined fixed and suspended medium system. The ENBNRAS system was proposed to intensify the treatment capacity of BNR-activated sludge (BNRAS) systems by addressing two difficulties often encountered in practice: (a) the long sludge age for nitrification requirement; and (b) sludge bulking. In the ENBNRAS system, nitrification is transferred from the aerobic reactor in the suspended medium activated sludge system to a fixed medium nitrification system. Thus, the sludge age of the suspended medium activated sludge system can be reduced from 20 to 25 days to 8 to 10 days, resulting in a decrease in reactor volume per ML wastewater treated of about 30%. Furthermore, the aerobic mass fraction can also be reduced from 50% to 60% to 55% (if the anaerobic mass fraction is 15%), and thus complete denitrification in the anoxic reactors becomes possible. Research indicates that both the short sludge age and complete denitrification could ameliorate anoxic aerobic (AA) or low food/microorganism (F/M) ratio filamentous bulking, and hence reduce the surface area of secondary settling tanks or increase the treatment capacity of existing systems. The lab-scale experimental investigations indicate that the ENBNRAS system can obtain: (i) very good chemical oxygen demand (COD) removal, even with an aerobic mass fraction as low as 20%; (ii) high nitrogen removal, even for a wastewater with a high total kjeldahl nitrogen (TKN)/COD ratio, up to 0.14; (iii) adequate settling sludge (diluted sludge volume index [DSVI] <100 mL/g); and (iv) a significant reduction in oxygen demand.

  2. Simulation and experimental investigation of active lightweight compliant mechanisms with integrated piezoceramic actuators

    Science.gov (United States)

    Modler, Niels; Winkler, Anja; Filippatos, Angelos; Lovasz, Erwin-Christian; Mărgineanu, Dan

    2016-08-01

    Compliant mechanisms with integrated actuators can enable new function-integrative structures through the elastic deformation of elements without the use of classical links and joints. For such designs, the mechanical behaviour of the mechanism has to be well known, because external loads, the utilised materials and the geometry of the structural parts influence the deformation performance significantly. In order to speed up the development process of such mechanisms, a tool for the dynamic analysis of compliant movements is necessary before any further FEM simulation and manufacturing. Therefore, the paper presents a simulating procedure for active compliant mechanisms obtained through the integration of piezoceramic actuators into fibre-reinforced composite structures using a double layer model. A new mechanism was designed, simulated, constructed and tested. The comparison between simulation and experimental results confirm the effectiveness of the presented procedure in regard to the design phase of new active compliant structures.

  3. Investigation of the motor activity of the gall bladder using cholescintigraphy

    International Nuclear Information System (INIS)

    The motor activity of the gall bladder was studied using cholescintigraphy with sup(99m)Tc-HIDA in 57 patients with chronic cholecystitis and chronic heaptitis and in 9 controls. A comparative analysis of the curves activity-time based upon the elements of images of the external contour and the entire zone of the gall bladder, made it possible to reveal differences in the type of reaction of the gall bladder to the use of cholagogic stimulators (cholecystokinin i.v. and cholagogic breakfast). A method of the processing of the results made it possible to determine the number of contraction phases of the gall bladder during its emptying as well as the true latent period and the period of primary reactions of the beliferous apparatus after taking a food stimulus

  4. Cisco Router and Switch Forensics Investigating and Analyzing Malicious Network Activity

    CERN Document Server

    Liu, Dale

    2009-01-01

    Cisco IOS (the software that runs the vast majority of Cisco routers and all Cisco network switches) is the dominant routing platform on the Internet and corporate networks. This widespread distribution, as well as its architectural deficiencies, makes it a valuable target for hackers looking to attack a corporate or private network infrastructure. Compromised devices can disrupt stability, introduce malicious modification, and endanger all communication on the network. For security of the network and investigation of attacks, in-depth analysis and diagnostics are critical, but no book current

  5. Supply and demand analysis of leisure activities in selected region

    OpenAIRE

    Helcl, Petr

    2014-01-01

    The Thesis on the topic "Supply and demand analysis of leisure activities in the region," focuses on the forms of spending free time in the selected region. The theoretical part deals with the study of scientific publications focusing on leisure and leisure education. The economic concepts are examined to define the work, factors affecting leisure adults and content of leisure activities and leisure educational activities. The legal system of the Czech Republic defining the possibilities of a...

  6. An investigation of the influence of reconceptualization of demonstrative experimental activities of optics in high school

    Directory of Open Access Journals (Sweden)

    Jair Lúcio Prados Ribeiro

    2013-08-01

    Full Text Available In this work, we analyze the influence that the use of demonstrative experiments can bring to the learning of optics. It is assumed that the development of experimental activities, when reconceptualized according to Hodson proposal, tends to contribute to the generation of cognitive conflicts when compared to traditional didactic experience. Justifications are given for an analysis of changes under a Piagetian bias, reconciled with Hodson proposal. The methodology used to structure the topics presentations was quasi-experimental, contrasting an experimental group with a control group. The measuring of the effectiveness of the suggested working method was made from a quantitative analysis, which identified some of the topics discussed had better results in learning, being more tied to the experiments carried out.

  7. Synthesis of some novel sulfonamide derivatives and investigating their biocidal activity in cooling towers

    Energy Technology Data Exchange (ETDEWEB)

    Badawi, Abdelfattah M.; Mohamed, Dalia Emam; Hafiz, Amal A.; Amed, Sahar M. [Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo (Egypt). Applied Surfactants Lab.; Gohar, Yousry M. [Alexandria Univ. (Egypt). Microbiology Div.; Soliman, El-Sayed Ahmed [Ain Shams Univ., Cairo (Egypt). Chemistry Dept.; Sanan, Mohamed S. [Alexandria National Refining and Petrochemical Co. (ANRPC), Alexandria (Egypt)

    2011-03-15

    A novel series of dibenzothiophenedioxide sulphonamide derivatives were synthesized and tested as antimicrobial agents. The chemical structures of the prepared compounds were confirmed by micro elemental analysis, fourier transform infrared (FT-IR) and proton nuclear magnetic resonance spectroscopy (H-NMR). The surface parameters of two of the prepared compounds were determined at 35 C including, surface tension, effectiveness, maximum surface excess and minimum surface area. Also the standard free energy of micellization and adsorption were recorded. The results showed that the prepared sulphonamides have good surface properties and effective antimicrobial activity against thirty three test organisms isolated from cooling towers. (orig.)

  8. Elemental investigation of talcum baby powder by X-Ray florescence and fast neutron activation Techniques

    International Nuclear Information System (INIS)

    Different samples of Egyptian and Hungarian talcum powders were studied, using X-ray florescence (XRF) and Fast Neutron Activation Analysis (FNAA) techniques to ensure the safety of its use. The K (X-rays) and the gamma-rays were measured, using Si(Li) and high-purity germanium (HPGe) spectrometers to detect and determine qualitatively and quantitatively the constituents of the studied samples. The concentrations of the elements (Mg, Si, Al, Fe, Zn, and Ba) were measured and their presence was confirmed by X-ray, lifetime and/or XRF measurements. One of these samples was also studied, using the Environmental Scanning Electron Microscope (ESEM)

  9. Synthesis, characterization and investigation of antioxidant activity of cobalt quercetin complex

    Science.gov (United States)

    Birjees Bukhari, S.; Memon, Shahabuddin; Mahroof Tahir, M.; Bhanger, M. I.

    2008-12-01

    This article describes a novel synthesis of cobalt and quercetin·2H 2O complex in methanol, characterized by using elemental analysis, UV-visible, 1H NMR, TGA, DSC and IR spectrometric techniques. The formation of complex is deduced from the UV-visible spectra which shows that the successive formation of cobalt-quercetin complex occurs in a ratio of 2:1 (metal/ligand) stoichiometrically. The antioxidant activity of the complex was evaluated by using 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging method. In this work, we have shown that the metal complexed flavonoids are much more effective free radical scavengers than the free flavonoids.

  10. Investigating diet and physical activity in Malaysia: education and family history of diabetes relate to lower levels of physical activity.

    Science.gov (United States)

    Tam, Cai Lian; Bonn, Gregory; Yeoh, Si Han; Wong, Chee Piau

    2014-01-01

    The National Health and Morbidity Survey (NHMS, 2011), estimates that the number of Malaysian adults suffering from type 2 diabetes has increased from 8.3 to 31.2% since 1996. This study is a preliminary investigation of possible factors contributing to this epidemic. Knowledge of diabetes, health locus of control, diet and exercise habits, as well as family history, education level and other demographic factors to better understand the correlates of risky and healthy behaviors. This was done as part of a larger initiative to improve prevention efforts. Questionnaires were completed by 770 individuals from three Malaysian states: Selangor, Penang, and Terengganu. Findings showed that people with better health knowledge and those who have a family history of type 2 diabetes were more likely to have healthy diets. Also, health knowledge related to lower alcohol consumption. Participants with diabetic family members, however, also reported higher levels of stress. Counterintuitively, higher educational levels, higher internal locus of control, better health knowledge, as well as a family history of diabetes all correlated with lower levels of physical activity. Thus, it is suggested that, while increasing health knowledge will be important in addressing the type 2 diabetes epidemic in Malaysia, especially in relation to diet, other cultural factors, specifically norms related to exercise and physical activity, also need to be addressed if the spread of type 2 diabetes is to be addressed over the long term.

  11. Investigating diet and physical activity in Malaysia: Education and family history of diabetes relate to lower levels of physical activity

    Directory of Open Access Journals (Sweden)

    Cai Lian eTam

    2014-12-01

    Full Text Available The National Health and Morbidity Survey (NHMS, 2011, estimates that the number of Malaysian adults suffering from type 2 diabetes has increased from 8.3% to 31.2% since 1996. This study is a preliminary investigation of possible factors contributing to this epidemic. Knowledge of diabetes, health locus of control, diet and exercise habits, as well as family history, education level and other demographic factors to better understand the correlates of risky and healthy behaviours. This was done as part of a larger initiative to improve prevention efforts. Questionnaires were completed by 770 individuals from three Malaysian states: Selangor, Penang, and Terengganu. Findings showed that people with better health knowledge and those who have a family history of type 2 diabetes were more likely to have healthy diets. Also, health knowledge related to lower alcohol consumption. Participants with diabetic family members, however, also reported higher levels of stress. Counterintuitively, higher educational levels, higher internal locus of control, better health knowledge, as well as a family history of diabetes all correlated with lower levels of physical activity. Thus, it is suggested that, while increasing health knowledge will be important in addressing the type 2 diabetes epidemic in Malaysia, especially in relation to diet, other cultural factors, specifically norms related to exercise and physical activity, also need to be addressed if the spread of type 2 diabetes is to be addressed over the long term.

  12. TO THE QUESTION OF PRIVATE THEORIES IN OPERATIVE-INVESTIGATIVE SCIENCE: THEORY OF OPERATIVE AND INVESTIGATIVE ACTIVITIES AGAINST ETHNIC CRIME

    Directory of Open Access Journals (Sweden)

    A. N. Pozdnyakov

    2016-01-01

    Full Text Available The questions related to the state and prospects of development of оперативно-разыскной science are examined in the article. About her becoming talks circumstance that within the framework of theory of operatively-search activity the row of private theories is already worked (set forth out : organization of operatively-search activity on a fight against the organized crime, theory of the personal searchand other. It contingently that in basis operatively-search sciences are stopped up components producting her development as her object and object presently many variantsand consist of row of are mutually constrained components. Private (special theories in operatively-search science are relatively independent scientific directions, that, leaning against the general theoretic base of this science, develop conceptual bases and strategy of fight against criminality in the separate spheres of social life with the use of forces, facilities and methods special. Grounds for the origin of new theories it is been under exploitation of normative legal framework and methodology of her application in practical activity of organs of internal affairs. Substantial worsening of situation in the field of fight against ethnic criminality - she came in an economy, the members of ethnic criminal structures all more often stay too long for crimes the extremist of orientation and terrorist character. Private theories are in criminology: ethnic criminology, ethnic psychology, worked out for the complex affecting reasons and factors, producting ethnic criminality. Development scopes of general theory of operatively-search activity of scientific methodologies on a fight against the crimes accomplished by the members of ethnic structures is a timely and exceptionally important tast. Such private to the theory can mark as "Operatively-search activity on a fight against ethnic criminality". In parallel it is necessary to develop methodologies, necessary

  13. Investigating differential dynamics of the MAPK signaling cascade using a multi-parametric global sensitivity analysis.

    Directory of Open Access Journals (Sweden)

    Jeongah Yoon

    Full Text Available Cell growth critically depends on signalling pathways whose regulation is the focus of intense research. Without utilizing a priori knowledge of the relative importance of pathway components, we have applied in silico computational methods to the EGF-induced MAPK cascade. Specifically, we systematically perturbed the entire parameter space, including initial conditions, using a Monte Carlo approach, and investigate which protein components or kinetic reaction steps contribute to the differentiation of ERK responses. The model, based on previous work by Brightman and Fell (2000, is composed of 28 reactions, 27 protein molecules, and 48 parameters from both mass action and Michaelis-Menten kinetics. Our multi-parametric systems analysis confirms that Raf inactivation is one of the key steps regulating ERK responses to be either transient or sustained. Furthermore, the results of amplitude-differential ERK phosphorylations within the transient case are mainly attributed to the balance between activation and inactivation of Ras while duration-differential ERK responses for the sustained case are, in addition to Ras, markedly affected by dephospho-/phosphorylation of both MEK and ERK. Our sub-module perturbations showed that MEK and ERK's contribution to this differential ERK activation originates from fluctuations in intermediate pathway module components such as Ras and Raf, implicating a cooperative regulatory mode among the key components. The initial protein concentrations of corresponding reactions such as Ras, GAP, and Raf also influence the distinct signalling outputs of ERK activation. We then compare these results with those obtained from a single-parametric perturbation approach using an overall state sensitivity (OSS analysis. The OSS findings indicate a more pronounced role of ERK's inhibitory feedback effect on catalysing the dissociation of the SOS complex. Both approaches reveal the presence of multiple specific reactions involved in

  14. Neutron activation analysis for environmental sample in Thailand

    Energy Technology Data Exchange (ETDEWEB)

    Busamongkol, Arporn; Nouchpramool, Sunun; Bunprapob, Supamatthree [Office of Atomic Energy for Peace, Bangkok (Thailand); Sumitra, Tatchai [Chulalongkorn Univ., Dept. of Nuclear Technology, Bangkok (Thailand)

    2003-03-01

    Neutron Activation Analysis has been applied for the trace elements analysis in environmental samples. Thirty three samples of airborne particulate were collected every week at Ongkharak Nuclear Research Center (ONRC) during the period of June 1998 to March 1999. The Ti, I, Mg, Na, V, K, Cl, Al, Mn, Ca, As, Sm, Sb, Br, La, Ce, Th, Cr, Cs, Sc, Rb, Fe, Zn and Co were analyzed by Neutron Activation Analysis utilizing 2 MW TRIGA MARK III research reactor. The certified reference materials 1632a and 1633a from National Bureau of Standard were select as standard. (author)

  15. Activation analysis in the environment: Science and technology

    International Nuclear Information System (INIS)

    Science is disciplined curiosity. Activation analysis was created more than 50 yr ago by Hevesy's curiosity and Levi's experimental skill. Technology is the exploitation of machines and materials for the fulfillment of human needs or wants. The early history of neutron activation analysis (NAA) was greatly influenced by military requirements. Since then the technique has found applications in many disciplines, including materials science, medicine, archaeology, geochemistry, agriculture, and forensic science. More recently, neutron activation analysts, responding to increasing public interest and concern, have made distinctive contributions to the study of environmental problems. Activation analysis, though it uses some procedures derived from physics, is essentially a chemical technique. The chemical study of the environment may be reviewed under many headings; three are discussed here: 1. occupational medicine 2. health of the general public 3. environmental pollution

  16. Motivations for active commuting: a qualitative investigation of the period of home or work relocation

    Directory of Open Access Journals (Sweden)

    Jones Caroline HD

    2012-09-01

    Full Text Available Abstract Background Promoting walking or cycling to work (active commuting could help to increase population physical activity levels. According to the habit discontinuity and residential self-selection hypotheses, moving home or workplace is a period when people (reassess, and may be more likely to change, their travel behavior. Research in this area is dominated by the use of quantitative research methods, but qualitative approaches can provide in-depth insight into the experiences and processes of travel behavior change. This qualitative study aimed to explore experiences and motivations regarding travel behavior around the period of relocation, in an effort to understand how active commuting might be promoted more effectively. Methods Participants were recruited from the Commuting and Health in Cambridge study cohort in the UK. Commuters who had moved home, workplace or both between 2009 and 2010 were identified, and a purposive sample was invited to participate in semi-structured interviews regarding their experiences of, and travel behavior before and after, relocating. A grounded theory approach was taken to analysis. Results Twenty-six commuters participated. Participants were motivated by convenience, speed, cost and reliability when selecting modes of travel for commuting. Physical activity was not a primary motivation, but incidental increases in physical activity were described and valued in association with active commuting, the use of public transport and the use of park-and-ride facilities. Conclusions Emphasizing and improving the relative convenience, cost, speed and reliability of active commuting may be a more promising approach to promoting its uptake than emphasizing the health benefits, at least around the time of relocation. Providing good quality public transport and free car parking within walking or cycling distance of major employment sites may encourage the inclusion of active travel in the journey to work

  17. Investigating Climate Change Issues With Web-Based Geospatial Inquiry Activities

    Science.gov (United States)

    Dempsey, C.; Bodzin, A. M.; Sahagian, D. L.; Anastasio, D. J.; Peffer, T.; Cirucci, L.

    2011-12-01

    In the Environmental Literacy and Inquiry middle school Climate Change curriculum we focus on essential climate literacy principles with an emphasis on weather and climate, Earth system energy balance, greenhouse gases, paleoclimatology, and how human activities influence climate change (http://www.ei.lehigh.edu/eli/cc/). It incorporates a related set of a framework and design principles to provide guidance for the development of the geospatial technology-integrated Earth and environmental science curriculum materials. Students use virtual globes, Web-based tools including an interactive carbon calculator and geologic timeline, and inquiry-based lab activities to investigate climate change topics. The curriculum includes educative curriculum materials that are designed to promote and support teachers' learning of important climate change content and issues, geospatial pedagogical content knowledge, and geographic spatial thinking. The curriculum includes baseline instructional guidance for teachers and provides implementation and adaptation guidance for teaching with diverse learners including low-level readers, English language learners and students with disabilities. In the curriculum, students use geospatial technology tools including Google Earth with embedded spatial data to investigate global temperature changes, areas affected by climate change, evidence of climate change, and the effects of sea level rise on the existing landscape. We conducted a designed-based research implementation study with urban middle school students. Findings showed that the use of the Climate Change curriculum showed significant improvement in urban middle school students' understanding of climate change concepts.

  18. Investigating the relationship of lightning activity and rainfall: A case study for Crete Island

    Science.gov (United States)

    Iordanidou, V.; Koutroulis, A. G.; Tsanis, I. K.

    2016-05-01

    The relationship of lightning activity and rainfall is investigated for rain events of variable intensity. Rain data from 22 gauging stations over the island of Crete and lightning activity from the Global Lightning Network including both cloud-to-ground and some cloud flashes are analyzed for the period September 2012 to June 2014. Local thunderstorms' characteristics are investigated both individually as well as in groups according to the results of k-means clustering algorithm in 3 dimensions (space (x, y) and time (t)) in which the number of clusters is decided by G-means algorithm. Correlation of non-zero pairs of rain intensity and number of flashes is examined at various time intervals, time lags and effective radii. Also, correlation of flash count within 50 km radius around the stations is examined for the rain events of maximum hourly intensity for each gauging station. The highest coincidence of lightning clusters with intense rain events reaches 60% when gauges are 25-30 km from the cluster center. Maximum correlation within non-zero pairs of rain intensity and flashes number is obtained for more intense rain (99th percentile) and for increased flash count within the searching area (more than 10 flashes). Also, correlation is stronger for shorter time windows. The findings of this study improve the understanding of thunderstorm events and could provide staple information for the improvement of forecasting extreme events.

  19. Investigation of shallow gas hydrate occurrence and gas seep activity on the Sakhalin continental slope, Russia

    Science.gov (United States)

    Jin, Young Keun; Baranov, Boris; Obzhirov, Anatoly; Salomatin, Alexander; Derkachev, Alexander; Hachikubo, Akihiro; Minami, Hrotsugu; Kuk Hong, Jong

    2016-04-01

    The Sakhalin continental slope has been a well-known gas hydrate area since the first finding of gas hydrate in 1980's. This area belongs to the southernmost glacial sea in the northern hemisphere where most of the area sea is covered by sea ice the winter season. Very high organic carbon content in the sediment, cold sea environment, and active tectonic regime in the Sakhalin slope provide a very favorable condition for occurring shallow gas hydrate accumulation and gas emission phenomena. Research expeditions under the framework of a Korean-Russian-Japanese long-term international collaboration projects (CHAOS, SSGH-I, SSGH-II projects) have been conducted to investigate gas hydrate occurrence and gas seepage activities on the Sakhalin continental slope, Russia from 2003 to 2015. During the expeditions, near-surface gas hydrate samples at more than 30 sites have been retrieved and hundreds of active gas seepage structures on the seafloor were newly registered by multidisciplinary surveys. The gas hydrates occurrence at the various water depths from about 300 m to 1000 m in the study area were accompanied by active gas seepage-related phenomena in the sub-bottom, on the seafloor, and in the water column: well-defined upward gas migration structures (gas chimney) imaged by high-resolution seismic, hydroacoustic anomalies of gas emissions (gas flares) detected by echosounders, seafloor high backscatter intensities (seepage structures) imaged by side-scan sonar and bathymetric structures (pockmarks and mounds) mapped by single/multi-beam surveys, and very shallow SMTZ (sulphate-methane transition zone) depths, strong microbial activities and high methane concentrations measured in sediment/seawater samples. The highlights of the expeditions are shallow gas hydrate occurrences around 300 m in the water depth which is nearly closed to the upper boundary of gas hydrate stability zone in the area and a 2,000 m-high gas flare emitted from the deep seafloor.

  20. Investigation of individuals going to coffeehouse with the aim of leisure time activities

    Directory of Open Access Journals (Sweden)

    Hüseyin ÖZTÜRK

    2015-08-01

    Full Text Available The main basis of this research is to investigate pe ople going to coffeehouse with the aim of leisure time activities. The research group of this study consist of individuals going to the coffeehouses with the aim of leisure time activities in the city of Gaz iantep, Turkey. A total of 421 individuals joined to the research voluntarily. The Research consists of two parts. In the first part, personal information was used. In the second part, the leisure questionnaire form developed by Binarbaşı (2006 was u sed in order to determine individuals’ leisure time habits. The statistical programme SPSS 16.0 software packed programme was used to analyze the data. While analyzing the data, descriptive statistics methods were used as frequency percentage so P <0.05 was considered statistically significant. As the result of research; it is seen that 41 years of age and older people prefer going to coffehouses more than the others, the big majority of them are elementary and junior high school graduates and mostly they are married people, mostly they have 1 - 2 children, as a profession they are mostly workers who take minimum wage and they work very little over salary as monthly income. People going to the coffeehouses in their free time preffered at a high rate that they mostly go to the coffeehouses to spend time with their friends, they are happy with this activity, in the same time they find it very relaxing and they mostly watch TV when they don’t go to coffeehouses in their spare time and they in dicated the reason for failure to participate in other activities except coffeehouses as the absence of relevant activities and programmes appealing to them and economic handicap.

  1. Preliminary phytochemical investigation and in vitro anthelmintic activities ofMaesa lanceolata solvent extracts againstLymnatis nilotica (aquatic leech)

    Institute of Scientific and Technical Information of China (English)

    Wondu Dagnaw; Alemayehu Mekonnen

    2016-01-01

    Objective:To investigate phytochemicals constituents and check the anthelmintic activities of Maesa lanceolata (M. lanceolata) solvent extracts against aquatic leech. Methods: Several phytochemicals were tested and screened from petroleum ether, chloroform and methanol extracts ofM. lanceolata extracts and their anthelmintic activities were done based on the standard procedure against aquatic leech. Piperazine citrate (20 mg/mL) was used as a reference standard while distilled water was used as a control. Results:Qualitative phytochemical analysis of different solvent (petroleum ether, chloroform and methanol) extracts ofM. lanceolata revealed the presence of flavonoids and alkaloids in chloroform extracts and alkaloids in methanol extracts. In addition to the qualitative analysis of the plant extracts, the anthelmintic effects were also evaluated against aquatic leech (Lymnatis nilotica). Accordingly, various concentrations (10, 20, 40 and 60 mg/mL) of each solvent (petroleum ether, chloroform and methanol) extracts and 20 mg/mL of standard drug were prepared and tested against the selected leech. All the tested concentrations showed anthelmintic activities in a dose-dependent manner. From petroleum ether, chloroform and methanol extracts, chloroform extracts with 60 mg/mL concentration was effective with the paralytic time of (29.00 ± 1.06) min and death time of (65.00 ± 2.00) min in gradient extraction method. But in the case of extraction without gradient method, methanol extracts with 60 mg/mL concentration showed effective paralysis and death time (26.00 ± 1.73) and (56.00 ± 1.56) min, respectively, against the selected aquatic leech. Conclusions:The present study revealed thatM. lanceolata extracts have magic anthelmintic activities which are helpful to treat aquatic leeches (Lymnatis nilotica) which are associated with the nasal cavities of animals and human beings.

  2. Annual activity report of Ignalina NPP Safety Analysis Group for 1996 year

    International Nuclear Information System (INIS)

    The main results of Ignalina NPP Safety Analysis Group (ISAG) investigations for 1996 are presented. ISAG is concentrating its research activities into four areas: the neutrons dynamics modelling, simulation of transient processes during loss of coolant accident, the reactor cooling systems modelling and the probabilistic safety assessment of accident confinement system. Ignalina Safety Analysis Report was prepared on the basis of these results. 37 refs., 9 tabs., 96 figs

  3. Investigation of the possible biological activities of a poisonous South African plant; Hyaenanche globosa (Euphorbiaceae

    Directory of Open Access Journals (Sweden)

    Saeideh Momtaz

    2010-01-01

    Full Text Available The present study was undertaken to explore the possible biochemical activities of Hyaenanche globosa Lamb. and its compounds. Two different extracts (ethanol and dichloromethane of four different parts (leaves, root, stem, and fruits of H. globosa were evaluated for their possible antibacterial, antityrosinase, and anticancer (cytotoxicity properties. Two pure compounds were isolated using column chromatographic techniques. Active extracts and pure compounds were investigated for their antioxidant effect on cultured ′Hela cells′. Antioxidant/oxidative properties of the ethanolic extract of the fruits of H. globosa and purified compounds were investigated using reactive oxygen species (ROS, ferric-reducing antioxidant power (FRAP, and lipid peroxidation thiobarbituric acid reactive substance (TBARS assays. The ethanolic extract of the leaves and fruits of H. globosa showed the best activity, exhibiting a minimum inhibitory concentration (MIC of 3.1 mg/ ml and a minimum bactericidal concentration (MBC of 1.56 and 6.2 mg/ml, respectively, against M. smegmatis. The ethanolic extract of the fruits of H. globosa (F.E showed the highest percentage of inhibitory activity of monophenolase (90.4% at 200 µg/ml. In addition, F.E exhibited 50% inhibitory concentration (IC 50 of 37.7 µg/ml on the viability of ′HeLa cells′ using cytotoxicity MTT assay. Subsequently, F.E was fractionated using phase-partitioning with n-hexane, ethyl acetate, and n-butanol. The cytotoxicity of these fractions were determined in vitro using different cancer cell lines. The n-hexane fraction exhibited the highest activity of toxicity. Therefore, this fraction was subjected to further separation by chromatographic methods. Two pure compounds known as: ′Tutin′ and ′hyenanchin′ were isolated and their structures were determined by NMR spectroscopic methods. Unpredictably, none of them showed significant ( P < 0.01 inhibition on cell viability/proliferation at the

  4. Investigation of the possible biological activities of a poisonous South African plant; Hyaenanche globosa (Euphorbiaceae)

    Science.gov (United States)

    Momtaz, Saeideh; Lall, Namrita; Hussein, Ahmed; Ostad, Seyed Nasser; Abdollahi, Mohammad

    2010-01-01

    The present study was undertaken to explore the possible biochemical activities of Hyaenanche globosa Lamb. and its compounds. Two different extracts (ethanol and dichloromethane) of four different parts (leaves, root, stem, and fruits) of H. globosa were evaluated for their possible antibacterial, antityrosinase, and anticancer (cytotoxicity) properties. Two pure compounds were isolated using column chromatographic techniques. Active extracts and pure compounds were investigated for their antioxidant effect on cultured ‘Hela cells’. Antioxidant/oxidative properties of the ethanolic extract of the fruits of H. globosa and purified compounds were investigated using reactive oxygen species (ROS), ferric-reducing antioxidant power (FRAP), and lipid peroxidation thiobarbituric acid reactive substance (TBARS) assays. The ethanolic extract of the leaves and fruits of H. globosa showed the best activity, exhibiting a minimum inhibitory concentration (MIC) of 3.1 mg/ ml and a minimum bactericidal concentration (MBC) of 1.56 and 6.2 mg/ml, respectively, against M. smegmatis. The ethanolic extract of the fruits of H. globosa (F.E) showed the highest percentage of inhibitory activity of monophenolase (90.4% at 200 μg/ml). In addition, F.E exhibited 50% inhibitory concentration (IC50) of 37.7 μg/ml on the viability of ‘HeLa cells’ using cytotoxicity MTT assay. Subsequently, F.E was fractionated using phase-partitioning with n-hexane, ethyl acetate, and n-butanol. The cytotoxicity of these fractions were determined in vitro using different cancer cell lines. The n-hexane fraction exhibited the highest activity of toxicity. Therefore, this fraction was subjected to further separation by chromatographic methods. Two pure compounds known as: ‘Tutin’ and ‘hyenanchin’ were isolated and their structures were determined by NMR spectroscopic methods. Unpredictably, none of them showed significant (P < 0.01) inhibition on cell viability/proliferation at the

  5. Phase transitions in the common brainstem and related systems investigated by nonstationary time series analysis.

    Science.gov (United States)

    Lambertz, M; Vandenhouten, R; Grebe, R; Langhorst, P

    2000-01-14

    neurons (influenced by baroreceptor afferents) and CBS neurons occur, and (d) the processing of baroreceptor input at the NTS neurons changes. The results of this complex analysis, which could not be done formerly in this manner, confirm and complete former investigations on the dynamic organization of the CBS with its changing relations to peripheral and other central nervous subsystems.

  6. Stiffening hydrogels for investigating the dynamics of hepatic stellate cell mechanotransduction during myofibroblast activation

    Science.gov (United States)

    Caliari, Steven R.; Perepelyuk, Maryna; Cosgrove, Brian D.; Tsai, Shannon J.; Lee, Gi Yun; Mauck, Robert L.; Wells, Rebecca G.; Burdick, Jason A.

    2016-02-01

    Tissue fibrosis contributes to nearly half of all deaths in the developed world and is characterized by progressive matrix stiffening. Despite this, nearly all in vitro disease models are mechanically static. Here, we used visible light-mediated stiffening hydrogels to investigate cell mechanotransduction in a disease-relevant system. Primary hepatic stellate cell-seeded hydrogels stiffened in situ at later time points (following a recovery phase post-isolation) displayed accelerated signaling kinetics of both early (Yes-associated protein/Transcriptional coactivator with PDZ-binding motif, YAP/TAZ) and late (alpha-smooth muscle actin, α-SMA) markers of myofibroblast differentiation, resulting in a time course similar to observed in vivo activation dynamics. We further validated this system by showing that α-SMA inhibition following substrate stiffening resulted in attenuated stellate cell activation, with reduced YAP/TAZ nuclear shuttling and traction force generation. Together, these data suggest that stiffening hydrogels may be more faithful models for studying myofibroblast activation than static substrates and could inform the development of disease therapeutics.

  7. Investigation of Prolactin Receptor Activation and Blockade Using Time-Resolved Fluorescence Resonance Energy Transfer

    Directory of Open Access Journals (Sweden)

    Estelle eTallet

    2011-09-01

    Full Text Available The prolactin receptor (PRLR is emerging as a therapeutic target in oncology. Knowledge-based drug design led to the development of a pure PRLR antagonist (Del1-9-G129R-hPRL that was recently shown to prevent PRL-induced mouse prostate tumorogenesis. In humans, the first gain-of-function mutation of the PRLR (PRLRI146L was recently identified in breast tumor patients. At the molecular level, the actual mechanism of action of these two novel players in the PRL system remains elusive. In this study, we addressed whether constitutive PRLR activation (PRLRI146L or PRLR blockade (antagonist involved alteration of receptor oligomerization and/or of inter-chain distances compared to unstimulated and PRL-stimulated PRLR. Using a combination of various biochemical and spectroscopic approaches (co-IP, blue-native electrophoresis, BRET1, we demonstrated that preformed PRLR homodimers are altered neither by PRL- or I146L-induced receptor triggering, nor by antagonist-mediated blockade. These findings were confirmed using a novel time-resolved fluorescence resonance energy transfer (TR-FRET technology that allows monitoring distance changes between cell-surface tagged receptors. This technology revealed that PRLR blockade or activation did not involve detectable distance changes between extracellular domains of receptor chains within the dimer. This study merges with our previous structural investigations suggesting that the mechanism of PRLR activation solely involves intermolecular contact adaptations leading to subtle intramolecular rearrangements.

  8. Investigation of relationships between parameters of solar nano-flares and solar activity

    Science.gov (United States)

    Safari, Hossein; Javaherian, Mohsen; Kaki, Bardia

    2016-07-01

    Solar flares are one of the important coronal events which are originated in solar magnetic activity. They release lots of energy during the interstellar medium, right after the trigger. Flare prediction can play main role in avoiding eventual damages on the Earth. Here, to interpret solar large-scale events (e.g., flares), we investigate relationships between small-scale events (nano-flares) and large-scale events (e.g., flares). In our method, by using simulations of nano-flares based on Monte Carlo method, the intensity time series of nano-flares are simulated. Then, the solar full disk images taken at 171 angstrom recorded by SDO/AIA are employed. Some parts of the solar disk (quiet Sun (QS), coronal holes (CHs), and active regions (ARs)) are cropped and the time series of these regions are extracted. To compare the simulated intensity time series of nano-flares with the intensity time series of real data extracted from different parts of the Sun, the artificial neural networks is employed. Therefore, we are able to extract physical parameters of nano-flares like both kick and decay rate lifetime, and the power of their power-law distributions. The procedure of variations in the power value of power-law distributions within QS, CH is similar to AR. Thus, by observing the small part of the Sun, we can follow the procedure of solar activity.

  9. Investigation of factors affecting xylanase activity from Trichoderma harzianum 1073 D3

    Directory of Open Access Journals (Sweden)

    Seyis Isil

    2005-03-01

    Full Text Available In this study, some physiological conditions affecting the activity of xylanase enzyme produced from Trichoderma harzianum 1073 D3 were determined. In addition, stabilization of pH and temperature in liquid and semi-solid state cultivation media were investigated. It was concluded that for maximum xylanase activity, incubation at 60°C in an enzyme incubation medium with pH 5 that contained 1 % xylan was appropriate. The stability studies showed that the enzyme was relatively stable in the pH range 3-7 and retained more than 50 % of its original activity after four months.Neste estudo algumas condições que afetam a atividade da enzima xylanase produzida a partir de Trichoderma harzianum 1073 D3 foram determinadas. A estabilização do pH e temperatura em cultivo líquido e semi-sólido foram avaliados. Foi concluído que para o máximo de atividade xylanase foi obtida com 1% de xylano a temperatura de 60ºC e pH 5.0. Estudos de estabilidade demonstraram que a enzima foi relativamente estável na faixa de pH entre 3-7 e retém mais do que 50% de sua atividade original após 4 meses.

  10. Investigating the antifungal activity of TiO2 nanoparticles deposited on branched carbon nanotube arrays

    International Nuclear Information System (INIS)

    Branched carbon nanotube (CNT) arrays were synthesized by plasma-enhanced chemical vapour deposition on a silicon substrate. Ni was used as the catalyst and played an important role in the realization of branches in vertically aligned nanotubes. TiO2 nanoparticles on the branched CNTs were produced by atmospheric pressure chemical vapour deposition followed by a 500 0C annealing step. Transmission and scanning electron microscopic techniques were used to study the morphology of the TiO2/branched CNT structures while x-ray diffraction and Raman spectroscopy were used to verify the characteristics of the prepared nanostructures. Their antifungal effect on Candida albicans biofilms under visible light was investigated and compared with the activity of TiO2/CNT arrays and thin films of TiO2. The TiO2/branched CNTs showed a highly improved photocatalytic antifungal activity in comparison with the TiO2/CNTs and TiO2 film. The excellent visible light-induced photocatalytic antifungal activity of the TiO2/branched CNTs was attributed to the generation of electron-hole pairs by visible light excitation with a low recombination rate, in addition to the high surface area provided for the interaction between the cells and the nanostructures. Scanning electron microscopy was used to observe the resulting morphological changes in the cell body of the biofilms existing on the antifungal samples.

  11. Elementary concentration of Peruibe black mud by neutron activation analysis

    International Nuclear Information System (INIS)

    The Peruibe Black Mud is used in therapies such as psoriasis, peripheral dermatitis, acne, seborrehea, myalgia arthritis and rheumatic non-articular processes. This material is characterized by is fine organic matter particles, sulphate reducing bacteria and a high content of potential reduction ions. Although this material is particles, sulphate reducing bacteria and a high content of potential reduction ions. Although this material is considered natural, it may not be free of possible adverse health effects, like toxic chemical elements, when used for therapeutic purposes. In the therapeutic treatments involving clays, clays are used in mud form also called peloids, obtained by maturation process. Five in natura and three maturated Black Mud samples were collected in Peruibe city, Sao Paulo State, Brazil. To investigate the distribution of major, trace and rare earth elements in the in natura and maturated clays that constitute the Peruibe Black Mud, neutron activation analysis (NAA) was used. A comparison between in natura and maturated mud shows that major, trace and rare earth elements follow the same order in both types. Generally, the concentrations in the maturated mud are slightly lower than in natura mud. Enrichment on the upper continental crust could be observed for the elements As, Br, Sb and Se, in these types of mud. (author)

  12. Elementary concentration of Peruibe black mud by neutron activation analysis

    Energy Technology Data Exchange (ETDEWEB)

    Torrecilha, Jefferson K.; Ponciano, Ricardo; Silva, Paulo S.C da, E-mail: jeffkoy@ipen.br [Instituto de Pesquisas Energeticas e Nucleares (IPEN-CNEN/SP), Sao Paulo, SP (Brazil)

    2013-07-01

    The Peruibe Black Mud is used in therapies such as psoriasis, peripheral dermatitis, acne, seborrehea, myalgia arthritis and rheumatic non-articular processes. This material is characterized by is fine organic matter particles, sulphate reducing bacteria and a high content of potential reduction ions. Although this material is particles, sulphate reducing bacteria and a high content of potential reduction ions. Although this material is considered natural, it may not be free of possible adverse health effects, like toxic chemical elements, when used for therapeutic purposes. In the therapeutic treatments involving clays, clays are used in mud form also called peloids, obtained by maturation process. Five in natura and three maturated Black Mud samples were collected in Peruibe city, Sao Paulo State, Brazil. To investigate the distribution of major, trace and rare earth elements in the in natura and maturated clays that constitute the Peruibe Black Mud, neutron activation analysis (NAA) was used. A comparison between in natura and maturated mud shows that major, trace and rare earth elements follow the same order in both types. Generally, the concentrations in the maturated mud are slightly lower than in natura mud. Enrichment on the upper continental crust could be observed for the elements As, Br, Sb and Se, in these types of mud. (author)

  13. Medical application of in vivo neutron activation analysis

    Energy Technology Data Exchange (ETDEWEB)

    Cohn, S.H.; Ellis, K.J.; Vartsky, D.; Zanzi, I.; Aloia, J.F.

    1978-01-01

    The clinical usefulness of total body neutron activation analysis (TBNAA) was clearly established at an IAEA panel meeting in Vienna in 1972. It is best demonstrated by the studies involving the measurement of total-body calcium. This measurement provides data useful for the diagnosis and management of metabolic bone disorders. It should be emphasized, however, that while most of the applications to date have involved calcium and phosphorus, the measurement of sodium, chlorine and nitrogen also appear to be useful clinically. Total-body calcium measurements utilizing TBNAA have been used in studies of osteoporosis to establish absolute and relative deficits of calcium in patients with this disease in comparison to a normal contrast population. Changes in total-body calcium (skeletal mass) have also been useful for quantitating the efficacy of various therapies in osteoporosis. Serial measurements over periods of years provide long-term balance data by direct measurement with a higher precision (+- 2%) than is possible by the use of any other technique. In the renal osteodystrophy observed in patients with renal failure, disorders of both calcium and phosphorus, as well as electrolyte disturbances, have been studied. The measure of total-body levels of these elements gives the clinician useful data upon which to design dialysis therapy. The measurement of bone changes in endocrine dysfunction has been studied, particularly in patients with thyroid and parathyroid disorders. In parathyroidectomy, the measurement of total-body calcium, post-operatively, can indicate the degree of bone resorption. Skeletal metabolism and body composition in acromegaly and Cushing's disease have also been investigated by TBNAA. Levels of cadmium in liver and kidney have also been measured in-vivo by prompt-gamma neutron activation and associated with hypertension, emphysema and cigarette smoking.

  14. Medical application of in vivo neutron activation analysis

    International Nuclear Information System (INIS)

    The clinical usefulness of total body neutron activation analysis (TBNAA) was clearly established at an IAEA panel meeting in Vienna in 1972. It is best demonstrated by the studies involving the measurement of total-body calcium. This measurement provides data useful for the diagnosis and management of metabolic bone disorders. It should be emphasized, however, that while most of the applications to date have involved calcium and phosphorus, the measurement of sodium, chlorine and nitrogen also appear to be useful clinically. Total-body calcium measurements utilizing TBNAA have been used in studies of osteoporosis to establish absolute and relative deficits of calcium in patients with this disease in comparison to a normal contrast population. Changes in total-body calcium (skeletal mass) have also been useful for quantitating the efficacy of various therapies in osteoporosis. Serial measurements over periods of years provide long-term balance data by direct measurement with a higher precision (+- 2%) than is possible by the use of any other technique. In the renal osteodystrophy observed in patients with renal failure, disorders of both calcium and phosphorus, as well as electrolyte disturbances, have been studied. The measure of total-body levels of these elements gives the clinician useful data upon which to design dialysis therapy. The measurement of bone changes in endocrine dysfunction has been studied, particularly in patients with thyroid and parathyroid disorders. In parathyroidectomy, the measurement of total-body calcium, post-operatively, can indicate the degree of bone resorption. Skeletal metabolism and body composition in acromegaly and Cushing's disease have also been investigated by TBNAA. Levels of cadmium in liver and kidney have also been measured in-vivo by prompt-gamma neutron activation and associated with hypertension, emphysema and cigarette smoking

  15. Mediation analysis of the relationship between institutional research activity and patient survival

    DEFF Research Database (Denmark)

    Rochon, Justine; du Bois, Andreas; Lange, Theis

    2014-01-01

    mediated through either optimal surgery or chemotherapy. Taken together, about 26% of the beneficial effect of research activity was mediated through the proposed pathways. CONCLUSIONS: Mediation analysis allows proceeding from the question "Does it work?" to the question "How does it work?" In particular......BACKGROUND: Recent studies have suggested that patients treated in research-active institutions have better outcomes than patients treated in research-inactive institutions. However, little attention has been paid to explaining such effects, probably because techniques for mediation analysis...... existing so far have not been applicable to survival data. METHODS: We investigated the underlying mechanisms using a recently developed method for mediation analysis of survival data. Our analysis of the effect of research activity on patient survival was based on 352 patients who had been diagnosed...

  16. Investigation on the Metabolic Regulation of pgi gene knockout Escherichia coli by Enzyme Activities and Intracellular Metabolite Concentrations

    Directory of Open Access Journals (Sweden)

    Nor ‘Aini, A. R.

    2006-01-01

    Full Text Available An integrated analysis of the cell growth characteristics, enzyme activities, intracellular metabolite concentrations was made to investigate the metabolic regulation of pgi gene knockout Escherichia coli based on batch culture and continuous culture which was performed at the dilution rate of 0.2h-1. The enzymatic study identified that pathways of pentose phosphate, ED pathway and glyoxylate shunt were all active in pgi mutant. The glycolysis enzymes i.e glyceraldehyde-3-phosphate dehydrogenase, fructose diphosphatase, pyruvate kinase, triose phosphate isomerase were down regulated implying that the inactivation of pgi gene reduced the carbon flux through glycolytic pathway. Meanwhile, the pentose phosphate pathway was active as a major route for intermediary carbohydrate metabolism instead of glycolysis. The pentose phosphate pathway generates most of the major reducing co-factor NADPH as shown by the increased of NADPH/NADP+ ratio in the mutant when compared with the parent strain. The fermentative enzymes such as acetate kinase and lactate dehydrogenase were down regulated in the mutant. Knockout of pgi gene results in the significant increase in the intracellular concentration of glucose-6-phosphate and decrease in the concentration of oxaloacetate. The slow growth rate of the mutant was assumed to be affected by the accumulation of glucose-6-phosphate and imbalance of NADPH reoxidation.

  17. Bio-templated CdSe quantum dots green synthesis in the functional protein, lysozyme, and biological activity investigation

    International Nuclear Information System (INIS)

    Bifunctional fluorescence (CdSe Quantum Dots) – protein (Lysozyme) nanocomposites were synthesized at room temperature by a protein-directed, solution-phase, green-synthetic method. Fluorescence (FL) and absorption spectra showed that CdSe QDs were prepared successfully with Lyz. The average particle size and crystalline structure of QDs were investigated by high-resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD), respectively. With attenuated total reflection-fourier transform infrared (ATR-FTIR) spectra and thermogravimetric (TG) analysis, it was confirmed that there is interaction between QDs and amide I, amide II groups in Lyz. FL polarization was measured and FL imaging was done to monitor whether QDs could be responsible for possible changes in the conformation and activity of Lyz. Interestingly, the results showed Lyz still retain the biological activity after formation of QDs, but the secondary structure of the Lyz was changed. And the advantage of this synthesis method is producing excellent fluorescent QDs with specifically biological function. -- Highlights: ► Lysozyme-directed green synthesis of CdSe quantum dots. ► Lysozyme still retain the biological activity after formation of CdSe. ► The method is the production of fluorescent QDs with highly specific and functions.

  18. Anti-Microbial Activity and Spectro-Chemical Investigation of Ink Extracts of Sepiella inermis (Van Hasselt 1835

    Directory of Open Access Journals (Sweden)

    Dasal VASANTHARAJA

    2014-09-01

    Full Text Available The crude petroleum ether and methanol ink extracts of Sepiella inermis were tested for their antimicrobial activity against human pathogenic fungi and bacteria by disc diffusion method. Spectral analysis was carried out by UV-VIS spectrophotometer, FT-IR, Raman IR and GC-MS. Of the two solvent extracts, only methanol extract was active and no activity was detected in petroleum ether extract. The human pathogenic fungus Candida albicans and bacterium Proteus vulgaris were found to be highly sensitive, with an inhibition zone of 20 and 19 mm respectively. GC-MS of methanol ink extract revealed sixteen compounds belonging to the derivatives of dihydroxy indole-2-carboxylic acid and dihydroxyindole. These investigations proved that methanol ink extract of Sepiella inermis possess significant antimicrobial property against both fungus and gram –ve bacteria. Since ink of sepia is available abundantly as a waste material, studies focused on isolation and characterization of bioactive substances pave the way for new antimicrobial compounds.

  19. Investigation of chemical composition and cytotoxic activity of aerial parts of Ziziphora clinopodioides Lam.

    Directory of Open Access Journals (Sweden)

    F. Yousefbeyk

    2016-04-01

    Full Text Available Background and objectives: Ziziphora clinopodioides is a perennial herb and grows widely in west and northwest of Iran. The aerial parts are used as appetizer, carminative and antiseptic as well as for the treatment of medical conditions such as high blood pressure, asthma hyperhidrosis, palpitation and insomnia Methods: The aerial parts of Ziziphora clinopodioides Lam. were extracted by ethanol (70% and fractionated by n-hexane. The n-hexane fraction was analyzed by GC and GC/MS. This fraction and the total extract were further investigated for in vitro cytotoxic activity against HT-29 (colon carcinoma, K-562 (leukemia, T-47D (breast ductal carcinoma and NIH-3T3 (Swiss mouse embryo fibroblast cells using MTT assay. Results:  Nineteen compounds were identified by GC/MS. The main constituents of the n-hexane fraction were pulegone (24.35%, menthol (14% and menthone (9.61%. The results of cytotoxicity evaluation showed that the n-hexane fraction strongly exhibited cytotoxic activity against T-47D and K-562 cells with IC50 value of 77.41±12.89 and 80±2.56 μg/mL. The total extract did not show considerable activity against any of the cell lines in comparison to the n-hexane fraction. Conclusion: The presence of compounds such as pulegone, menthol and menthone could explain the cytotoxic activity of the n-hexane fraction of Z. clinopodioides Lam on K-562, T-47D and HT-29 cell lines.

  20. Health-care district management information system plan: Review of operations analysis activities during calendar year 1975 and plan for continued research and analysis activities

    Science.gov (United States)

    Nielson, G. J.; Stevenson, W. G.

    1976-01-01

    Operations research activities developed to identify the information required to manage both the efficiency and effectiveness of the Veterans Administration (VA) health services as these services relate to individual patient care are reported. The clinical concerns and management functions that determine this information requirement are discussed conceptually. Investigations of existing VA data for useful management information are recorded, and a diagnostic index is provided. The age-specific characteristics of diseases and lengths of stay are explored, and recommendations for future analysis activities are articulated. The effect of the introduction of new technology to health care is also discussed.

  1. TRUNK AND HIP MUSCLE ACTIVITY IN EARLY WALKERS WITH AND WITHOUT CEREBRAL PALSY – A FREQUENCY ANALYSIS

    OpenAIRE

    Prosser, Laura A.; Lee, Samuel C. K.; Barbe, Mary F.; VanSant, Ann F.; Lauer, Richard T.

    2010-01-01

    Poor control of postural muscles is a primary impairment in cerebral palsy (CP), yet core trunk and hip muscle activity has not been thoroughly investigated. Frequency analysis of electromyographic (EMG) signals provides insight about the intensity and pattern of muscle activation, correlates with functional measures in CP, and is sensitive to change after intervention. The objective of this study was to investigate differences in trunk and hip muscle activation frequency in children with CP ...

  2. MODEL OF ACTIVITY OF THE ENTERPRISE AS MODEL OF ACTIVITY OF THE HUMAN: SEARCH ANALYSIS

    Directory of Open Access Journals (Sweden)

    Ruslan Flerovich Vildanov

    2014-09-01

    Full Text Available Actualized demand of manufactury company's efficiency from the point of quality charachteristics. Reveal unbreakable connection of man and organisation, on example of the comparative analysis of man's and manufacture company's activities. Studing models of company's and men's activities in order to reveal similarity. In order of their implementation to the economics assumes opportunity of using scientific methods, which use for studying functions, vital activities and behavior of the men.

  3. An evaluation of Compton suppression neutron activation analysis for determination of trace elements in some geological samples.

    Science.gov (United States)

    Landsberger, S; Kapsimalis, R

    2009-12-01

    Compton suppressed neutron activation analysis has been used for a variety of applications, but never has a detailed discussion of its use in far more complex matrices, such as geological samples, been fully addressed. This investigation seeks to serve as a qualitative evaluation of Compton suppression neutron activation analysis (CSNAA) and to illustrate the benefits of using Compton suppression with thermal and epithermal neutrons for the analysis of several geological specimens. PMID:19577479

  4. Investigation, Analysis, and Modeling of Longwall Face-to-Face Transfers

    OpenAIRE

    Patrick, William Charles

    1995-01-01

    This dissertation reports on research efforts to investigate, analyze, and model longwall face-to-face transfers through the use of operations research techniques. The purpose is to reduce overall transfer time and the variation of transfer times among operations within the U. S. longwall industry. The research includes: (1) investigation of existing longwall transfers to determine standard and variant procedures; (2) development of comprehensive activity sequence models of existing longwall ...

  5. 76 FR 35016 - Agency Information Collection Activities; Proposed Collection; Comments Requested: Investigator...

    Science.gov (United States)

    2011-06-15

    ... Collection; Comments Requested: Investigator Integrity Questionnaire ACTION: 30-Day Notice and request for... Form/Collection: Investigator Integrity Questionnaire. (3) Agency form number, if any, and the... ATF utilizes the services of contract investigators to conduct security/suitability investigations...

  6. A package for gamma-ray spectrum analysis and routine neutron activation analysis

    Indian Academy of Sciences (India)

    M E Medhat; A Abdel-Hafiez; Z Awaad; M A Ali

    2005-08-01

    A package for gamma spectrum analysis (PGSA) was developed using object oriented Borland C++ design for MS-windows. This package consists of five programs which can be used for gamma-ray spectrum analysis and routine neutron activation analysis. The advantages of PGSA are its simple algorithms and its need for only minimum amount of input information.

  7. Analysis of nuclear activity of ten polar ring galaxies

    CERN Document Server

    Freitas-Lemes, P; Dors, O L; Faúndez-Abans, M

    2013-01-01

    The accumulation of mass from the interaction process that forms the polar ring galaxies is a factor that favors the conditions necessary to trigger nonthermal nuclear activities.. This fact encouraged the chemical analysis of ten polar ring galaxies. In order to verify the presence of an active nucleus in these galaxias, we built diagnostic diagrams using lines H{\\beta}, [OIII], [HI], H{\\alpha}, [NII], and [SII] and classified the type of nuclear activity. For galaxies that do not show shock, the parameters N2 and O3N2 were also determined. From this sample, we identified seven galaxies with an active nucleus and three that behave as HII regions. One galaxy with an active nucleus was classified as Seyfert. Although our data do not provide a statistically significant sample, we can speculate that polar ring galaxies are a setting conducive to trigger non-thermal nuclear activities.

  8. Experimental Investigation of Active Feedback Control of Turbulent Transport in a Magnetized Plasma

    Energy Technology Data Exchange (ETDEWEB)

    Gilmore, Mark Allen [University of New Mexico

    2013-07-07

    A new and unique basic plasma science laboratory device - the HelCat device (HELicon-CAThode) - has been constructed and is operating at the University of New Mexico. HelCat is a 4 m long, 0.5 m diameter device, with magnetic field up to 2.2 kG, that has two independent plasmas sources - an RF helicon source, and a thermionic cathode. These two sources, which can operate independently or simultaneously, are capable of producing plasmas with a wide range of parameters and turbulence characteristics, well suited to a variety of basic plasma physics experiments. An extensive set of plasma diagnostics is also operating. Experiments investigating the active feedback control of turbulent transport of particles and heat via electrode biasing to affect plasma ExB flows are underway, and ongoing.

  9. Mechanistic investigation of industrial wastewater naphthenic acids removal using granular activated carbon (GAC) biofilm based processes.

    Science.gov (United States)

    Islam, Md Shahinoor; Zhang, Yanyan; McPhedran, Kerry N; Liu, Yang; Gamal El-Din, Mohamed

    2016-01-15

    Naphthenic acids (NAs) found in oil sands process-affected waters (OSPW) have known environmental toxicity and are resistant to conventional wastewater treatments. The granular activated carbon (GAC) biofilm treatment process has been shown to effectively treat OSPW NAs via combined adsorption/biodegradation processes despite the lack of research investigating their individual contributions. Presently, the NAs removals due to the individual processes of adsorption and biodegradation in OSPW bioreactors were determined using sodium azide to inhibit biodegradation. For raw OSPW, after 28 days biodegradation and adsorption contributed 14% and 63% of NA removal, respectively. For ozonated OSPW, biodegradation removed 18% of NAs while adsorption reduced NAs by 73%. Microbial community 454-pyrosequencing of bioreactor matrices indicated the importance of biodegradation given the diverse carbon degrading families including Acidobacteriaceae, Ectothiorhodospiraceae, and Comamonadaceae. Overall, results highlight the ability to determine specific processes of NAs removals in the combined treatment process in the presence of diverse bacteria metabolic groups found in GAC bioreactors.

  10. Investigation of activated Al-pillared clay efficiency in vegetable oil purification

    Directory of Open Access Journals (Sweden)

    Lomić Gizela A.

    2004-01-01

    Full Text Available This paper represents a contribution to the applicability of natural clays and their derivates as adsorbents in the process of purification of vegetable oil. Investigation of textural properties of raw and purified clay samples reveals that during acid activation and Al-pillaring, BET and micropore surface area increases significantly. However, bleaching capacity of clay and its derivates is not determined by using sample surface area, but rather sample total pore volume. Surface area, especially micropore surface area contributes to removal of smaller molecules. This was confirmed by successful elimination of moisture and volatile materials by samples with an appropriate micropore structure. Used samples of clay and its derivates do not significantly influence acid and peroxide values of raw sunflower oil during its treatment.

  11. A Typology of Child School Behavior: Investigation Using Latent Profile Analysis and Cluster Analysis

    Science.gov (United States)

    Mindrila, Diana L.

    2016-01-01

    To describe and facilitate the identification of child school behavior patterns, we developed a typology of child school behavior (ages 6-11 years) using the norming data (N = 2,338) for the second edition of the Behavior Assessment System for Children Teacher Rating-Child form). Latent profile analysis was conducted with the entire data set,…

  12. Analysis and modeling of container terminal handling activities

    OpenAIRE

    Armando CARTENÌ; Luca, Stefano de

    2010-01-01

    Although the technical literature contains numerous efforts to simulate container terminal performance, little attention has been paid to setting up, calibrating and validating models for handling equipment activities. This paper presents results from the estimation of activity duration concerning three different types of handling equipment: mobile harbor cranes, gantry cranes and reach stackers. Two estimation approaches (sample means vs. random variables) were investigated with respect to d...

  13. OVERALL SENSITIVITY ANALYSIS UTILIZING BAYESIAN NETWORK FOR THE QUESTIONNAIRE INVESTIGATION ON SNS

    OpenAIRE

    Tsuyoshi Aburai; Kazuhiro Takeyasu

    2013-01-01

    Social Networking Service (SNS) is prevailing rapidly in Japan in recent years. The most popular ones are Facebook, mixi, and Twitter, which are utilized in various fields of life together with the convenient tool such as smart-phone. In this work, a questionnaire investigation is carried out in order to clarify the current usage condition, issues and desired functions. More than 1,000 samples are gathered. Bayesian network is utilized for this analysis. Sensitivity analysis is carried out by...

  14. Status Report on the Neutron Activation Analysis Activities in the Philippines

    International Nuclear Information System (INIS)

    The Philippines has a one megawatt open-pool type nuclear research reactor which is presently utilized in the conduct of nuclear research and development activities. The reactor is operated by the Philippine Atomic Research Center, the research arm of the Philippine Atomic Energy Commission. The reactor is presently utilized in the production of some radioisotopes, nuclear physics experiments and neutron activation analysis. For activation analysis the facilities available include the two 2 inch pneumatic tubes and a 2-inch central core dry-pipe. Although the reactor has been operative since 1963 it was only in the latter part of 1966 that a neutron activation analysis group was organized and almost immediately the training of personnel and setting up of a radiochemical laboratory and nucleonic counting assembly were initiated. Today, the counting system include a 100 channel analyzer with a 3 x 3 inch Nal(Tl) crystal

  15. Survey on Neutron Activation Analysis Activities at the Dalat Nuclear Research Centre

    International Nuclear Information System (INIS)

    The Dalat Nuclear Research Centre (D.N.R.C.) during the past few years has been involved in conducting an activation analysis service. Work has been carried out in collaboration with other organizations. However, no rigid research programme of our own has been established and thus the Radiochemistry Division of the D.N.R.C. has no personnel and special facilities permanently engaged in this field. The equipment and facilities used are shared with other activities within the Division and the whole Centre. The activities in neutron activation analysis at the D.N.R.C. are sporadically revived by requests for analysis. Up to now, such analyses have been performed free of charge. Most of the work was carried out on biological materials such as vegetables, raw natural rubber (RES smoked sheets of different qualities, crepes and dried rubber films obtained from concentrated natural latex) from hevea tree leaves from various clones

  16. Performance Analysis for Dispensing Mechanism of Active Code

    Institute of Scientific and Technical Information of China (English)

    2003-01-01

    The dispensing mechanism of active code is a key technology in an active network. Conventional capsule and programmable switch approaches have their own shortcomings. The DCCAN(distributed code caching for active network) mechanism presented in this paper overcomes these shortcomings. In this paper, capsule and programmable switch approaches are introduced, and their shortcomings are analyzed. The principle of the DCCAN mechanism is described. The theory analysis in transmit width based on the DCCAN mechanism and capsule approach are described. The theory analysis shows that the DCCAN mechanism has many good characteristics and can improve the efficiency of an active network. Key factors which affect the transmit width based on the DCCAN mechanism are discussed. The using condition of the DCCAN mechanism is also discussed.

  17. Timing Analysis of Light Curves in the Tartarus Active Galactic Nuclei Database

    CERN Document Server

    O'Neill, P M; Papadakis, I E; Turner, T J; Neill, Paul M. O'; Nandra, Kirpal; Papadakis, Iossif E.

    2004-01-01

    The Tartarus database contains products for 529 ASCA observations of active galactic nuclei. We have been updating Tartarus to include observing sequences conducted after 1999 January. The revised database will contain products for 375 objects, with a total of 614 observing sequences. We have begun a systematic timing analysis of the Tartarus light curves. We present here some preliminary results of an investigation into the relation between excess variance and black-hole mass. Having optimised our analysis to minimize the scatter in the variance measurements, we find that the narrow-line active galactic nuclei follow roughly the same relation as the broad-line objects.

  18. Visual Analysis of Biological Activity Data with Scaffold Hunter.

    Science.gov (United States)

    Klein, Karsten; Koch, Oliver; Kriege, Nils; Mutzel, Petra; Schäfer, Till

    2013-12-01

    The growing interest in chemogenomics approaches over the last years has led to an increasing amount of data regarding chemical and the corresponding biological activity space. The resulting data, collected in either in-house or public databases, need to be analyzed efficiently to speed-up the increasingly difficult task of drug discovery. Unfortunately, the discovery of new chemical entities or new targets for known drugs ('drug repurposing') is not suitable to a fully automated analysis or a simple drill down process. Visual interactive interfaces that allow to explore chemical space in a systematic manner and facilitate analytical reasoning can help to overcome these problems. Scaffold Hunter is a tool for the visual analysis of chemical compound databases that provides integrated visualization and analysis of biological activity data and fosters the interactive exploration of data imported from a variety of sources. We describe the features and illustrate the use by means of an exemplary analysis workflow.

  19. Investigation of a sterilization system using active oxygen species generated by ultraviolet irradiation.

    Science.gov (United States)

    Yoshino, Kiyoshi; Matsumoto, Hiroyuki; Iwasaki, Tatsuyuki; Kinoshita, Shinobu; Noda, Kazutoshi; Oya, Kei; Iwamori, Satoru

    2015-01-01

    We have been investigating an advanced sterilization system that employs active oxygen species (AOS). We designed the sterilization equipment, including an evacuation system, which generates AOS from pure oxygen gas using ultraviolet irradiation, in order to study the conditions necessary for sterilization in the system's chamber. Using Geobachillus stearothermophilus spores (10(6) CFU) in a sterile bag as a biological indicator (BI) in the chamber of the AOS sterilization apparatus, we examined the viability of the BI as a function of exposure time, assessing the role of the decompression level in the sterilization performance. We found that the survival curves showed exponential reduction, and that the decompression level did not exert a significant influence on the survival curve. Subsequently, we investigated the sterilization effect as influenced by the spatial and environmental temperature variation throughout the chamber, and found that the sterilization effect varied with position, due to the varying environmental temperature in the respective areas. We confirmed that temperature is one of the most important factors influencing sterilization in the chamber, and estimated the temperature effect on the distribution of atomic oxygen concentration, using the quartz crystal microbalance (QCM) method with fluorocarbon thin film prepared by radio frequency sputtering.

  20. A Framework for Detecting Fraudulent Activities in EDO State Tax Collection System Using Investigative Data Mining

    Directory of Open Access Journals (Sweden)

    Okoro F. M

    2016-05-01

    Full Text Available Edo State Inland Revenue Services is overwhelmed with gigabyte of disk capacity containing data about tax payers’ in the state. The data stored on the database increases in size at an alarming rate. This has resulted in a data rich but information poor situation where there is a widening gap between the explosive growth of data and its types, and the ability to analyze and interpret it effectively; hence the need for a new generation of automated and intelligent tools and techniques known as investigative data mining, to look for patterns in data. These patterns can lead to new insights, competitive advantages for business, and tangible benefits for the State Revenue services. This research work focuses on designing effective fraud detection and deterring architecture using investigative data mining technique. The proposed system architecture is designed to reason using Artificial Neural Network and Machine learning algorithm in order to detect and deter fraudulent activities. We recommend that the architectural framework be developed using Object Oriented Programming and Agent Oriented Programming Languages.

  1. Activity investigation of pinostrobin towards herpes simplex virus-1 as determined by atomic force microscopy.

    Science.gov (United States)

    Wu, Nan; Kong, Yu; Zu, Yuangang; Fu, Yujie; Liu, Zhiguo; Meng, Ronghua; Liu, Xia; Efferth, Thomas

    2011-01-15

    In the present study, the antiviral activity of pinostrobin towards herpes simplex virus-1 (HSV-1) was investigated by MTT assay and atomic force microscopy. Pinostrobin can inhibit HSV-1 replication with 50% effective concentration (EC(50)) of 22.71 ± 1.72 μg/ml. MTT assay showed HSV-1 was significantly inhibited when pretreated with pinostrobin, with the inhibition of 85.69 ± 2.59%. Significant changes in morphology and size of HSV-1 were observed by atomic force microscopy (AFM) in response to pinostrobin treatment. AFM topography and phase images showed that with increasing time, the envelope was shedded and damaged, finally leading to virus inactivation. With increasing concentration, pinostrobin caused a gradual leakage, also contributing to breakage of the envelope and virus inactivation. Treatment effect of oral pinostrobin in vivo showed that pinostrobin (50mg/kg/dose) possesses definite therapeutical effect in the development of lesion score. In general, the results showed that AFM represents a powerful technique for the investigation of morphology and size of HSV-1 treated by antiviral agents. AFM is applicable to study chemically induced morphological changes at the nanometer level. PMID:20739162

  2. Investigation of a sterilization system using active oxygen species generated by ultraviolet irradiation.

    Science.gov (United States)

    Yoshino, Kiyoshi; Matsumoto, Hiroyuki; Iwasaki, Tatsuyuki; Kinoshita, Shinobu; Noda, Kazutoshi; Oya, Kei; Iwamori, Satoru

    2015-01-01

    We have been investigating an advanced sterilization system that employs active oxygen species (AOS). We designed the sterilization equipment, including an evacuation system, which generates AOS from pure oxygen gas using ultraviolet irradiation, in order to study the conditions necessary for sterilization in the system's chamber. Using Geobachillus stearothermophilus spores (10(6) CFU) in a sterile bag as a biological indicator (BI) in the chamber of the AOS sterilization apparatus, we examined the viability of the BI as a function of exposure time, assessing the role of the decompression level in the sterilization performance. We found that the survival curves showed exponential reduction, and that the decompression level did not exert a significant influence on the survival curve. Subsequently, we investigated the sterilization effect as influenced by the spatial and environmental temperature variation throughout the chamber, and found that the sterilization effect varied with position, due to the varying environmental temperature in the respective areas. We confirmed that temperature is one of the most important factors influencing sterilization in the chamber, and estimated the temperature effect on the distribution of atomic oxygen concentration, using the quartz crystal microbalance (QCM) method with fluorocarbon thin film prepared by radio frequency sputtering. PMID:25817808

  3. Investigation of the Highly Active Manganese Superoxide Dismutase from Saccharomyces cerevisiae

    Energy Technology Data Exchange (ETDEWEB)

    Cabelli, D.E.; Barnese, K.; Sheng, Y.; Stich, T.A.; Gralla, E.B.; Britt, R.D.; Valentine, J.S.

    2010-09-15

    Manganese superoxide dismutase (MnSOD) from different species differs in its efficiency in removing high concentrations of superoxide (O{sub 2}{sup -}), due to different levels of product inhibition. Human MnSOD exhibits a substantially higher level of product inhibition than the MnSODs from bacteria. In order to investigate the mechanism of product inhibition and whether it is a feature common to eukaryotic MnSODs, we purified MnSOD from Saccharomyces cerevisiae (ScMnSOD). It was a tetramer with 0.6 equiv of Mn per monomer. The catalytic activity of ScMnSOD was investigated by pulse radiolysis and compared with human and two bacterial (Escherichia coli and Deinococcus radiodurans) MnSODs. To our surprise, ScMnSOD most efficiently facilitates removal of high concentrations of O{sub 2}{sup -} among these MnSODs. The gating value k{sub 2}/k{sub 3} that characterizes the level of product inhibition scales as ScMnSOD > D. radiodurans MnSOD > E. coli MnSOD > human MnSOD. While most MnSODs rest as the oxidized form, ScMnSOD was isolated in the Mn{sup 2+} oxidation state as revealed by its optical and electron paramagnetic resonance spectra. This finding poses the possibility of elucidating the origin of product inhibition by comparing human MnSOD with ScMnSOD.

  4. Investigation of actuator debonding effects on active control in smart composite laminates

    Directory of Open Access Journals (Sweden)

    Bin Huang

    2015-04-01

    Full Text Available This article presents a numerical study of active vibration control of smart composite laminates in the presence of actuator debonding failures. A comparison between the smart composite laminates with healthy actuator and various partially debonded actuator cases is performed to investigate the debonding effects on the vibration suppression. The improved layerwise theory with Heaviside’s unit step function is adopted to model the displacement field with actuator debonding failure. The higher order electric potential field is adopted to describe the potential variation through the thickness. The finite element method–based formulations are derived using the plate element, taking into consideration the electro-mechanical coupling effect. The reduced-order model is represented by the state-space form and further for the vibration suppression using a simple constant gain velocity feedback control strategy. For the purpose of demonstration, a 16-layer cross-ply substrate laminate ([0/90]4s is employed for the numerical study. The results show that the actuator debonding affects the closed-loop frequencies, active damping ratios, and efficiency of vibration suppression.

  5. Phytochemical investigation and antimicrobial activity of Caesalpinia bonduc (linn Roxb seeds

    Directory of Open Access Journals (Sweden)

    V. Subramani

    2014-06-01

    Full Text Available The aim of the study was to investigate phytochemical properties, antimicrobial activity and trace metal concentrations of Caesalpinia bonducella. The phytochemical screening of the extracts of leaves of C. bonducella revealed the presence of bioactive compounds such as Steroid, Triterpenoids, Reducing Sugar(A, Reducing Sugar(B, Sugars, Flavonoids, Saponin, Amino acids with absence of Alkaloids, Phenolic Compounds, Catachins, Tannins, Anthroquinones.  The ethanol solvent was used for extraction and was used to screen the antimicrobial activity of C. bonducella leaves against certain pathogens by disc diffusion method. In the antimicrobial study, in bacteria, the test sample was most effective against Escherichia coli NCIM 2931 (B2 while smaller effect was noticed from Staphylococcus aureus NCIM 5021 (B3. In fungi, this was effective against Epidermophyton floccosum var. nigricans MTCC 613 (F2 whereas smaller effect was observed in Candida glabrata MTCC 3984 (F1. All the microbial strains depict higher sensitivity to the higher concentration (1.2 mg / disc for the test sample when compared to the positive control except bacterial strains such as Bacillus subtilis NCIM 2920 (B1 and Staphylococcus aureus NCIM 5021 (B3.  The result was supported the view that C. bonducella is a potent antimicrobial agent compared with the conventional antibiotic. The concentrations of trace metals in plants were not cross the standard level. Hence, it is signified that Aloe vera plant extract is safe to be used as an antimicrobial agent.

  6. Phytochemical investigation and antimicrobial activity of leaves extract of Vernonia auriculifera Hiern.

    Directory of Open Access Journals (Sweden)

    Bekele Albejo

    2015-12-01

    Full Text Available Context: The genus Vernonia is one of the largest groups in the family Compositae constituting more than 500 species distributed widely in tropical and sub-tropical regions of Africa, Asia, and America. Traditionally the genus is used for the treatment of schistosomiasis, amoebic dysentery, gastrointestinal problems, malaria, venereal diseases, wounds, hepatitis, and diabetes. Vernonia auriculifera Hiern is used for healing wounds as ointment around the injured areas. Aims: To investigate the phytochemical constituents and evaluate antimicrobial activity of leaves extract of Vernonia auriculifera Hiern. Methods: Phytochemical screening tests were conducted to identify the class of compounds present in the leaves extracts of V. auriculifera. Silica gel column chromatographic technique was applied to separate the constituents of the extracts. Various spectroscopic techniques (IR, 1H NMR, 13C NMR, DEPT-135, COSY, gHSQC, and gHMBC were applied to determine the structures of isolated compounds. Results: Phytochemical screening of the methanol leaf extract revealed the presence of tannins, flavonoids, terpenoids, saponins and absence of anthraquinones, steroids, and alkaloids. Silica gel column chromatography of the methanol leaves extract yielded one compound. The hexane, chloroform, methanol and water extracts were tested against Staphylococcus aureus. The methanol and water extracts showed promising growth suppression at minimum inhibitory concentration of 200 mg/mL. Conclusions: The polar extracts of the leaves of Vernonia auriculifera Hiern possess antimicrobial activity.

  7. A Shock Mitigation of Pedestrian-Vehicle Impact Using Active Hood Lift System: Deploying Time Investigation

    Directory of Open Access Journals (Sweden)

    Tae-Hoon Lee

    2016-01-01

    Full Text Available This paper investigates the deploying time (or response time of an active hood lift system (AHLS of a passenger vehicle activated by gunpowder actuator. In this work, this is accomplished by changing principal design parameters of the latch part mechanism of the hood system. After briefly introducing the working principle of the AHLS operated by the gunpowder actuator, the governing equations of the AHLS are formulated for each different deploying motion. Subsequently, using the governing equations, the response time for deploying the hold lift system is determined by changing several geometric distances such as the distance from the rotational center of the pop-up guide to the point of the latch in the axial and vertical directions. Then, a comparison is made of the total response time to completely deploy the hood lift system with the existing conventional AHLS and proposed AHLS. In addition, the workable driving speed of the proposed AHLS is compared with the conventional one by changing the powder volume of the actuator.

  8. Investigation into the antioxidant and antidiabetic potential of Moringa stenopetala: identification of the active principles.

    Science.gov (United States)

    Habtemariam, Solomon

    2015-03-01

    The fresh leaves of Moringa stenopetala (family, Moringaceae) are commonly eaten as cabbage while dried leaves are used as nutritional supplement and for treating a variety of disease conditions including diabetes. The present investigation into the therapeutic potential of the leaves and seeds of the plant revealed no inhibitory effect against α-glucosidase enzyme up to the concentration of 200 μg/mL but the leaves extract displayed potent DPPH (1,1-diphenyl-2- picrylhydrazyl) radical scavenging effect (IC50, 59.5 ± 4.1 μg/mL). An activity directed fractionation and isolation procedure resulted in the identification of the major antioxidant compound as rutin and minor active component, neochlorogenic acid. Both the crude extract (0.8-200 μg/mL) and rutin (0.8-200 μM) but not neochlorogenic acid displayed a concentration-dependent protection of human pancreatic β-cells (1.4E7 cells) from oxidant-induced cell death. The identification of these compounds along with their potential role in the nutritional and medicinal significance of the plant is discussed. PMID:25924532

  9. Investigations into the antibacterial activities of phytotherapeutics against Helicobacter pylori and Campylobacter jejuni.

    Science.gov (United States)

    Cwikla, C; Schmidt, K; Matthias, A; Bone, K M; Lehmann, R; Tiralongo, E

    2010-05-01

    The prevalence of gastric diseases is increasing with H. pylori, the causative agent of acute and chronic gastritis, being a major predisposing factor for peptic ulcer disease and gastric carcinoma. C. jejuni is the most common cause of enteric infections, particularly among children, resulting in severe diarrhoea. Increasing drug resistance of these bacteria against standard antibiotics, and the more widespread use of herbal medicines, favours investigations into additional anti-Helicobacter and anti-Campylobacter effects of phytotherapeutics that are already used for their beneficial effects on bowel and digestive functions. Twenty-one hydroethanol herbal extracts and four essential oils were screened for antibacterial activity using a modification of a previously described micro-dilution assay and compared with the inhibitory effects of antibiotics. The herbal extracts showing the highest growth inhibition of C. jejuni were Calendula officinalis, Matricaria recutita, Zingiber officinale, Salvia officinalis, Foeniculum vulgare and Silybum marianum. Agrimonia eupatoria, Hydrastis canadensis, Filipendula ulmaria and Salvia officinalis were the most active herbal extracts in inhibiting the growth of H. pylori. This study provides evidence for additional beneficial effects of phytotherapeutics marketed for their gastrointestinal effects and identifies new beneficial antibacterial effects for some herbal medicines not currently recommended for gastrointestinal problems. PMID:19653313

  10. Investigation into the antioxidant and antidiabetic potential of Moringa stenopetala: identification of the active principles.

    Science.gov (United States)

    Habtemariam, Solomon

    2015-03-01

    The fresh leaves of Moringa stenopetala (family, Moringaceae) are commonly eaten as cabbage while dried leaves are used as nutritional supplement and for treating a variety of disease conditions including diabetes. The present investigation into the therapeutic potential of the leaves and seeds of the plant revealed no inhibitory effect against α-glucosidase enzyme up to the concentration of 200 μg/mL but the leaves extract displayed potent DPPH (1,1-diphenyl-2- picrylhydrazyl) radical scavenging effect (IC50, 59.5 ± 4.1 μg/mL). An activity directed fractionation and isolation procedure resulted in the identification of the major antioxidant compound as rutin and minor active component, neochlorogenic acid. Both the crude extract (0.8-200 μg/mL) and rutin (0.8-200 μM) but not neochlorogenic acid displayed a concentration-dependent protection of human pancreatic β-cells (1.4E7 cells) from oxidant-induced cell death. The identification of these compounds along with their potential role in the nutritional and medicinal significance of the plant is discussed.

  11. Xenon diffusion studies with prompt gamma activation analysis

    International Nuclear Information System (INIS)

    Developing a better understanding of xenon transport through porous systems is critical to predicting how this gas will enter the atmosphere after a below ground nuclear weapons test. Radioxenon monitoring is a vital part of the Comprehensive Nuclear-Test-Ban Treaty (CTBT) International Monitoring System. This work details the development of prompt gamma activation analysis for measuring the diffusion rates of xenon and argon gases through a porous medium. The University of Texas at Austin maintains a prompt gamma activation analysis facility with a peak neutron flux of ∼ 1.5 x 107 cm-2 s-1 and a beam diameter of 1 cm. Due to the relatively large prompt gamma cross sections of many stable xenon isotopes at thermal and sub-thermal neutron energies, prompt gamma activation analysis is a suitable technique for in situ non-destructive analysis of natural xenon. A test chamber has been designed and constructed to utilize prompt gamma activation analysis to measure xenon and argon diffusion through geological materials (e.g., sand, soil, etc.). Initial experiments have been conducted to determine the detection limits for stable gas measurements. The results from these experiments will be utilized to benchmark parts of a xenon transport model that is being used to determine diffusion coefficients for xenon and argon. (author)

  12. DNQAA program to be used in activation analysis

    International Nuclear Information System (INIS)

    The concentrations of the analysed elements were calculated by the program, based on the instrumental technique of analysis by activation. The DNQAA corrects due to the radioactive decay and to the neutron flow variation or carried particles and too the error propagation involved in the analysis. It is written in ORACL to be used in the ORTEC 6240-42 system. (L.M.J.)

  13. Instrumental Neuron Activation Analysis for certification of stainless steel materials

    International Nuclear Information System (INIS)

    The use of Instrumental Neuron Activation Analysis (INAA) may contribute to improve the certification of the materials, especially in the case of minor and trace elements. In presented paper the INAA method of analysis of stainless steel materials has been elaborated. The obtained results were compared with those of common analytical techniques. The presented results show the usefulness of the INAA method for the certification of CRMs for the iron and steel industry

  14. Investigating the Nuclear Activity of Barred Spiral Galaxies: The Case of NGC 1672

    Science.gov (United States)

    Jenkins, L. P.; Brandt, W. N.; Colbert, E. J.; Koribalski, B.; Kuntz, K. D.; Levan, A. J.; Ojha, R.; Roberts, T. P.; Ward, M. J.; Zezas, A.

    2011-01-01

    We have performed an X-ray study of the nearby barred spiral galaxy NGC 1672, primarily to ascertain the effect of the bar on its nuclear activity. We use both Chandra and XMM-Newton observations to investigate its X-ray properties, together with supporting high-resolution optical imaging data from the Hubble Space Telescope (HST) infrared imaging from the Spitzer Space Telescope, and Australia Telescope Compact Array ground-based radio data. We detect 28 X-ray sources within the D25 area of the galaxy; many are spatially correlated with star formation in the bar and spiral arms, and two are identified as background galaxies in the HST images. Nine of the X-ray sources are ultraluminous X-ray sources, with the three brightest (LX 5 * 10(exp 39) erg s(exp -1)) located at the ends of the bar. With the spatial resolution of Chandra, we are able to show for the first time that NGC 1672 possesses a hard (1.5) nuclear X-ray source with a 2-10 keV luminosity of 4 * 10(exp 38) erg s(exp -1). This is surrounded by an X-ray-bright circumnuclear star-forming ring, comprised of point sources and hot gas, which dominates the 2-10 keV emission in the central region of the galaxy. The spatially resolved multiwavelength photometry indicates that the nuclear source is a low-luminosity active galactic nucleus (LLAGN), but with star formation activity close to the central black hole. A high-resolution multiwavelength survey is required to fully assess the impact of both large-scale bars and smaller-scale phenomena such as nuclear bars, rings, and nuclear spirals on the fueling of LLAGN.

  15. CRIMES AGAINST FAMILY AND MINORS: ANALYSIS OF TYPICAL INVESTIGATIVE SITUATIONS OF THE INITIAL STAGE OF THE INVESTIGATION

    Directory of Open Access Journals (Sweden)

    Kuyemzhiyeva S. A.

    2016-02-01

    Full Text Available The article describes typical investigatory situations on initial stage of the investigation, we have given the peculiarities of the situations in crimes against the family and the structure of the investigative action on each of them

  16. Spectroscopic investigation of biosynthesized nickel nanoparticles and its larvicidal, pesticidal activities.

    Science.gov (United States)

    Elango, Ganesh; Roopan, Selvaraj Mohana; Dhamodaran, Kasinathan Irukatla; Elumalai, Kuppusamy; Al-Dhabi, Naif Abdullah; Arasu, Mariadhas Valan

    2016-09-01

    Methanolic extract of Cocos nucifera (C. nucifera) was collected using Soxhlet apparatus. C. nucifera methanolic extract was used to prepare Nickel nanoparticles (Ni NPs). Eco-friendly synthesized Ni NPs were confirmed by several analytical techniques such as UV-Visible spectroscopy (UV-Vis), Fourier Transform Infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Scanning Electron Microscope (SEM), Energy Dispersive X-ray analysis (EDAX), Transmission Electron Microscope (TEM) and Zeta potential. The obtained results infer that green synthesized Ni NPs are in cubical shape with an average particle size of 47nm. Synthesized Ni NPs were subjected to pesticidal activity against agricultural pest Callasobruchus maculates (C. maculates) which resulted in 97.31% mortality. These results were compared with commercially available standard Azadirachtin. Also we have studied larvicidal activity against Aedes ageypti (A. ageypti) larvae which resulted in LC 50 and LC 90 value of 259.24, 446.99ppm respectively and the result proved to be significant which were processed by ANOVA LSD Tukey's test. PMID:27371915

  17. Microwave-assisted facile green synthesis of silver nanoparticles and spectroscopic investigation of the catalytic activity

    Indian Academy of Sciences (India)

    Siby Joseph; Beena Mathew

    2015-06-01

    Silver nanoparticles have been successfully synthesized in aqueous medium by a green, rapid and costefficient synthetic approach based on microwave irradiation. In this study, iota-carrageenan (I-carrageenan) is used both as reducing and stabilizing agent. The formation of nanoparticles is determined using UV–vis, Fourier transform infrared (FTIR), X-ray diffraction (XRD), energy-dispersive X-ray (EDX) and high-resolution-transmission electron microscopic (HR-TEM) analysis. Transmission electron microscopic (TEM) images show that the nanoparticles are of spherical shape with an average diameter of 18.2 nm. I-carrageenan-stabilized silver nanoparticles show outstanding catalytic activity for the reduction of 4-nitrophenol in the presence of NaBH4 in aqueous medium. The reaction follows pseudo-first-order kinetics and the reaction rate increases with the increase in amount of the catalyst. The study of the temperature dependence of reaction rate gives activation energy of 42.81 kJ mol−1. The synthesized silver nanoparticles are anticipated to be a promising material for pollution abatement.

  18. Experimental investigation and CFD simulation of active damping mechanism for propellant slosh in spacecraft launch systems

    Science.gov (United States)

    Leuva, Dhawal

    2011-07-01

    Motion of propellant in the liquid propellant tanks due to inertial forces transferred from actions like stage separation and trajectory correction of the launch vehicle is known as propellant slosh. If unchecked, propellant slosh can reach resonance and lead to complete loss of the spacecraft stability, it can change the trajectory of the vehicle or increase consumption of propellant from the calculated requirements, thereby causing starvation of the latter stages of the vehicle. Predicting the magnitude of such slosh events is not trivial. Several passive mechanisms with limited operating range are currently used to mitigate the effects of slosh. An active damping mechanism concept developed here can operate over a large range of slosh frequencies and is much more effective than passive damping devices. Spherical and cylindrical tanks modeled using the ANSYS CFX software package considers the free surface of liquid propellant exposed to atmospheric pressure. Hydrazine is a common liquid propellant and since it is toxic, it cannot be used in experiment. But properties of hydrazine are similar to the properties of water; therefore water is substituted as propellant for experimental study. For close comparison of the data, water is substituted as propellant in CFD simulation. The research is done in three phases. The first phase includes modeling free surface slosh using CFD and validation of the model by comparison to previous experimental results. The second phase includes developing an active damping mechanism and simulating the behavior using a CFD model. The third phase includes experimental development of damping mechanism and comparing the CFD simulation to the experimental results. This research provides an excellent tool for low cost analysis of damping mechanisms for propellant slosh as well as proves that the concept of an active damping mechanism developed here, functions as expected.

  19. Research in the fields of radiochemistry and activation analysis using the LENA TRIGA nuclear plant

    International Nuclear Information System (INIS)

    In the past two years most of the research effort at the Radiochemistry Laboratory and National Research Council Centre for Radiochemistry and Activation Analysis has been devoted to research and development of activation analysis using the TRIGA Mark II LENA reactor of the University of Pavia. Pile neutrons have been used both in steady state and pulse mode, in the determination of oxygen in non ferrous materials. Neutron activation has been applied to the determination of some atmospheric particulate pollutants. Another field, in which activation analysis has been applied, is forensic research. Methods have been developed for the determination of antimony, barium and copper in gunpowder residues. By using inorganic materials such as molybdenum dibromide, zinc ferrocyanide and cadmium metal in granular form it was possible to set up simple chemical procedures in the activation analysis of trace amounts of noble metals in metallic matrices (high purity nickel and copper), geochemical materials (rocks and meteorites) and biological materials (orchard leaves). Neutron activation analysis was also used to investigate on the extraction of the platinum group metals from iodide and thiocyanate solutions at low concentrations

  20. [Deterministic analysis as a tool to investigate the contingency of various components of biocenosis].

    Science.gov (United States)

    Bulgakov, N G; Maksimov, V N

    2005-01-01

    Specific application of deterministic analysis to investigate the contingencies of various components of natural biocenosis was illustrated by the example of fish production and biomass of phyto- and zooplankton. Deterministic analysis confirms the theoretic assumptions on food preferences of herbivorous fish: both silver and bighead carps avoided feeding on cyanobacteria. Being a facultative phytoplankton feeder, silver carp preferred microalgae to zooplankton. Deterministic analysis allowed us to demonstrate the contingency of the mean biomass of phyto- and zooplankton during both the whole fish production cycle and the individual periods. PMID:16004266

  1. Cluster analysis of activity-time series in motor learning

    DEFF Research Database (Denmark)

    Balslev, Daniela; Nielsen, Finn Årup; Frutiger, Sally A.;

    2002-01-01

    Neuroimaging studies of learning focus on brain areas where the activity changes as a function of time. To circumvent the difficult problem of model selection, we used a data-driven analytic tool, cluster analysis, which extracts representative temporal and spatial patterns from the voxel...... practice-related activity in a fronto-parieto-cerebellar network, in agreement with previous studies of motor learning. These voxels were separated from a group of voxels showing an unspecific time-effect and another group of voxels, whose activation was an artifact from smoothing. Hum. Brain Mapping 15...

  2. Cluster analysis of activity-time series in motor learning

    DEFF Research Database (Denmark)

    Balslev, Daniela; Nielsen, Finn Å; Futiger, Sally A;

    2002-01-01

    Neuroimaging studies of learning focus on brain areas where the activity changes as a function of time. To circumvent the difficult problem of model selection, we used a data-driven analytic tool, cluster analysis, which extracts representative temporal and spatial patterns from the voxel...... practice-related activity in a fronto-parieto-cerebellar network, in agreement with previous studies of motor learning. These voxels were separated from a group of voxels showing an unspecific time-effect and another group of voxels, whose activation was an artifact from smoothing...

  3. IN VITRO ANALYSIS OF MIGRATION ACTIVITY OF ENCEPHALYTOGENIC T CEL

    Directory of Open Access Journals (Sweden)

    M. A. Nosov

    2010-01-01

    Full Text Available Experimental autoimmune encephalomyelitis in an adoptive transfer model is caused by injecting animal with activated T cells specific for a CNS antigen, e.g., basic myelin protein. Development of autimmune inflammation in such a model is connected with changed functional stateof encephalytogenic (EG T cells in the coure of disease progression, as reflected by changes in their activation, proliferation and motility levels. Present work describes an original technique allowing for in vitro analysis of encephalytogenic T cell motility, and studying effects of certain compomemts of extracellular matrix upon migration and functional activities of EG T cells.

  4. Investigation of decolorization of textile wastewater in an anaerobic/aerobic biological activated carbon system (A/A BAC).

    Science.gov (United States)

    Pasukphun, N; Vinitnantharat, S; Gheewala, S

    2010-04-01

    The aim of this study is to investigate the decolorization in anaerobic/aerobic biological activated carbon (A/A BAC) system. The experiment was divided into 2 stages; stage I is batch test for preliminary study of dye removal equilibrium time. The preliminary experiment (stage I) provided the optimal data for experimental design of A/A BAC system in SBR (stage II). Stage II is A/A BAC system imitated Sequencing Batch Reactor (SBR) which consist of 5 main periods; fill, react, settle, draw and idle. React period include anaerobic phase followed by aerobic phase. The BAC main media; Granular Activated Carbon (GAC), Mixed Cultures (MC) and Biological Activated Carbon (BAC) were used for dye and organic substances removal in three different solutions; Desizing Agent Solution (DAS), dye Solution (DS) and Synthetic Textile Wastewater (STW). Results indicate that GAC adsorption plays role in dye removal followed by BAC and MC activities, respectively. In the presence desizing agent, decolorization by MC was improved because desizing agent acts as co-substrates for microorganisms. It was found that 50% of dye removal efficiency was achieved in Fill period by MC. GC/MS analysis was used to identify dye intermediate from decolorization. Dye intermediate containing amine group was found in the solution and on BAC surfaces. The results demonstrated that combination of MC and BAC in the system promotes decolorization and dye intermediate removal. In order to improve dye removal efficiency in an A/A BAC system, replacement of virgin GAC, sufficient co-substrates supply and the appropriate anaerobic: aerobic period should be considered.

  5. Nondestructive multielemental analysis of ancient roman pottery using photon activation analysis techniques

    International Nuclear Information System (INIS)

    Several analytical methods were tested for the multiparameter-analysis of ancient roman pottery in order to elaborate a procedure for their identification. Main constituents, minor and trace-elements have been analyzed by high-energy photon activation analysis, followed by high resolution gamma spectroscopy. The environmental influence on the concentrations of the minor constituents and trace elements during deposition of the sherds in the soil has been examined. A comparison has been made between analysis data of ancient pottery obtained by photon activation analysis, X-ray fluorescence analysis and 14 MeV neutron activation analysis. Tables are given on the time dependence of the trace elements. The numerical data are summarized in several diagrams. (T.G.)

  6. Facilitating neuronal connectivity analysis of evoked responses by exposing local activity with principal component analysis preprocessing: simulation of evoked MEG.

    Science.gov (United States)

    Gao, Lin; Zhang, Tongsheng; Wang, Jue; Stephen, Julia

    2013-04-01

    When connectivity analysis is carried out for event related EEG and MEG, the presence of strong spatial correlations from spontaneous activity in background may mask the local neuronal evoked activity and lead to spurious connections. In this paper, we hypothesized PCA decomposition could be used to diminish the background activity and further improve the performance of connectivity analysis in event related experiments. The idea was tested using simulation, where we found that for the 306-channel Elekta Neuromag system, the first 4 PCs represent the dominant background activity, and the source connectivity pattern after preprocessing is consistent with the true connectivity pattern designed in the simulation. Improving signal to noise of the evoked responses by discarding the first few PCs demonstrates increased coherences at major physiological frequency bands when removing the first few PCs. Furthermore, the evoked information was maintained after PCA preprocessing. In conclusion, it is demonstrated that the first few PCs represent background activity, and PCA decomposition can be employed to remove it to expose the evoked activity for the channels under investigation. Therefore, PCA can be applied as a preprocessing approach to improve neuronal connectivity analysis for event related data.

  7. Analysis by Neutron activation of the Calakmul jadeite mask

    International Nuclear Information System (INIS)

    It is very important to know the elemental composition of archaeological materials with the purpose to find relations that allow to establish their origin standards. the origin and present localization of pre hispanic archaeological pieces can lead to the determination of commercial routes and of technology transfer among different ancient cultures. In the present work it has been realized a systematic analysis using the Instrumental neutron activation analysis technique of three samples obtained from Calakmul jadeite mask, tomb I, that in addition to give a composition of constituent and trace elements detected by this technique it has leaded to establish an applicable methodology to the routine analysis of ceramics of historical interest. (Author)

  8. Statistical analysis of acoustic wave parameters near active regions

    CERN Document Server

    Soares, M Cristina Rabello; Scherrer, Philip H

    2016-01-01

    In order to quantify the influence of magnetic fields on acoustic mode parameters and flows in and around active regions, we analyse the differences in the parameters in magnetically quiet regions nearby an active region (which we call `nearby regions'), compared with those of quiet regions at the same disc locations for which there are no neighboring active regions. We also compare the mode parameters in active regions with those in comparably located quiet regions. Our analysis is based on ring diagram analysis of all active regions observed by HMI during almost five years. We find that the frequency at which the mode amplitude changes from attenuation to amplification in the quiet nearby regions is around 4.2 mHz, in contrast to the active regions, for which it is about 5.1 mHz. This amplitude enhancement (the `acoustic halo effect') is as large as that observed in the active regions, and has a very weak dependence on the wave propagation direction. The mode energy difference in nearby regions also changes...

  9. Meta-Analysis of Studies Investigating the Effects of Father Absence on Children's Cognitive Performance.

    Science.gov (United States)

    Salzman, Stephanie A.

    A meta-analysis was conducted of 137 studies investigating the effects of father absence due to employment, military service, death, divorce, separation, or desertion on children's cognitive performance as assessed by scores on standardized intelligence, scholastic aptitude, and academic achievement tests and school grades. Aggregation of the…

  10. Investigating the Magnetic Interaction with Geomag and Tracker Video Analysis: Static Equilibrium and Anharmonic Dynamics

    Science.gov (United States)

    Onorato, P.; Mascheretti, P.; DeAmbrosis, A.

    2012-01-01

    In this paper, we describe how simple experiments realizable by using easily found and low-cost materials allow students to explore quantitatively the magnetic interaction thanks to the help of an Open Source Physics tool, the Tracker Video Analysis software. The static equilibrium of a "column" of permanents magnets is carefully investigated by…

  11. Reflected Signal Analysis and Surface Albedo in the Mars Orbiter Laser Altimeter (MOLA) Investigation

    Science.gov (United States)

    Ivanov, Anton B.; Muhleman, Duane O.

    2001-01-01

    This work presents results from the analysis of the reflectivity data from the MOLA investigation. We will discuss calculation of the surface albedo using the MGS TES 9 micron opacity. We will also overview reflectivity data collected to date. Additional information is contained in the original extended abstract.

  12. EXTRACTION, ANALYSIS AND BIOLOGICAL ACTIVITIES OF A FAMILY OF DITERPENES

    OpenAIRE

    Emmanuelle Villedieu; Emilie Destandau; Chantal Pichon; Sabine Berteina-Raboin

    2011-01-01

    Our study deals with a diterpenoid lactone family isolated from Andrographis paniculata. Our work was to perform extraction method, HPLC analysis and purification starting from commercial products. It led to the isolation of several pure compounds. Then, we investigated the effect of these molecules and the crude extracts towards immunostimulation.

  13. EXTRACTION, ANALYSIS AND BIOLOGICAL ACTIVITIES OF A FAMILY OF DITERPENES

    Directory of Open Access Journals (Sweden)

    Emmanuelle Villedieu

    2011-09-01

    Full Text Available Our study deals with a diterpenoid lactone family isolated from Andrographis paniculata. Our work was to perform extraction method, HPLC analysis and purification starting from commercial products. It led to the isolation of several pure compounds. Then, we investigated the effect of these molecules and the crude extracts towards immunostimulation.

  14. Statistical Analysis of Acoustic Wave Parameters Near Solar Active Regions

    Science.gov (United States)

    Rabello-Soares, M. Cristina; Bogart, Richard S.; Scherrer, Philip H.

    2016-08-01

    In order to quantify the influence of magnetic fields on acoustic mode parameters and flows in and around active regions, we analyze the differences in the parameters in magnetically quiet regions nearby an active region (which we call “nearby regions”), compared with those of quiet regions at the same disk locations for which there are no neighboring active regions. We also compare the mode parameters in active regions with those in comparably located quiet regions. Our analysis is based on ring-diagram analysis of all active regions observed by the Helioseismic and Magnetic Imager (HMI) during almost five years. We find that the frequency at which the mode amplitude changes from attenuation to amplification in the quiet nearby regions is around 4.2 mHz, in contrast to the active regions, for which it is about 5.1 mHz. This amplitude enhacement (the “acoustic halo effect”) is as large as that observed in the active regions, and has a very weak dependence on the wave propagation direction. The mode energy difference in nearby regions also changes from a deficit to an excess at around 4.2 mHz, but averages to zero over all modes. The frequency difference in nearby regions increases with increasing frequency until a point at which the frequency shifts turn over sharply, as in active regions. However, this turnover occurs around 4.9 mHz, which is significantly below the acoustic cutoff frequency. Inverting the horizontal flow parameters in the direction of the neigboring active regions, we find flows that are consistent with a model of the thermal energy flow being blocked directly below the active region.

  15. Investigations into the pyrolytic behaviour of coal/biomass blends using thermogravimetric analysis

    Energy Technology Data Exchange (ETDEWEB)

    Vuthaluru, H.B. [Curtin Univ. of Technology, Dept. of Chemical Engineering, Perth, WA (Australia)

    2004-04-01

    Investigations into the pyrolytic behaviour during co-pyrolysis of coal, biomass materials and coal/biomass blends prepared at different ratios (10:90, 20:80, 30:70 and 50:50) have been conducted using a thermogravimetric analysis (TGA) apparatus. The coal sample selected was Collie sub-bituminous coal from Western Australia, while wood waste (WW) and wheat straw (WS) were used as biomass samples. Three thermal events were identified during the pyrolysis. The first two were dominated by the biomass pyrolysis, while the third was linked to the coal pyrolysis, which occurred at much higher temperatures. No interactions were seen between the coal and biomass during co-pyrolysis. The pyrolytic characteristics of the blends followed those of the parent fuels in an additive manner. Among the tested blends, 20:80 blends showed the lowest activation energies of 90.9 and 78.7 kJ mol{sup -1} for coal/WW and coal/WS blends respectively. The optimum blend ratio for pyrolysis of coal/WS was 50:50 with a high degradation rate in all the thermal events and a higher mass loss over the course of the co-pyrolysis compared to coal/WW blends examined. The reaction orders in these experiments were in the range of 0.21-1.60, thus having a significant effect on the overall reaction rate. Besides the pyrolysis of coal alone, the 50:50 coal/biomass blends had the highest reaction rate, ranging 1x10{sup 9}-2x10{sup 9} min{sup -1}. The experimental results may provide useful data for power generation industries for the development of co-firing options with biomass. (Author)

  16. Physiological Investigation and Transcriptome Analysis of Polyethylene Glycol (PEG)-Induced Dehydration Stress in Cassava.

    Science.gov (United States)

    Fu, Lili; Ding, Zehong; Han, Bingying; Hu, Wei; Li, Yajun; Zhang, Jiaming

    2016-01-01

    Cassava is an important tropical and sub-tropical root crop that is adapted to drought environment. However, severe drought stress significantly influences biomass accumulation and starchy root production. The mechanism underlying drought-tolerance remains obscure in cassava. In this study, changes of physiological characters and gene transcriptome profiles were investigated under dehydration stress simulated by polyethylene glycol (PEG) treatments. Five traits, including peroxidase (POD) activity, proline content, malondialdehyde (MDA), soluble sugar and soluble protein, were all dramatically induced in response to PEG treatment. RNA-seq analysis revealed a gradient decrease of differentially expressed (DE) gene number in tissues from bottom to top of a plant, suggesting that cassava root has a quicker response and more induced/depressed DE genes than leaves in response to drought. Overall, dynamic changes of gene expression profiles in cassava root and leaves were uncovered: genes related to glycolysis, abscisic acid and ethylene biosynthesis, lipid metabolism, protein degradation, and second metabolism of flavonoids were significantly induced, while genes associated with cell cycle/organization, cell wall synthesis and degradation, DNA synthesis and chromatin structure, protein synthesis, light reaction of photosynthesis, gibberelin pathways and abiotic stress were greatly depressed. Finally, novel pathways in ABA-dependent and ABA-independent regulatory networks underlying PEG-induced dehydration response in cassava were detected, and the RNA-Seq results of a subset of fifteen genes were confirmed by real-time PCR. The findings will improve our understanding of the mechanism related to dehydration stress-tolerance in cassava and will provide useful candidate genes for breeding of cassava varieties better adapted to drought environment.

  17. Physiological Investigation and Transcriptome Analysis of Polyethylene Glycol (PEG)-Induced Dehydration Stress in Cassava.

    Science.gov (United States)

    Fu, Lili; Ding, Zehong; Han, Bingying; Hu, Wei; Li, Yajun; Zhang, Jiaming

    2016-01-01

    Cassava is an important tropical and sub-tropical root crop that is adapted to drought environment. However, severe drought stress significantly influences biomass accumulation and starchy root production. The mechanism underlying drought-tolerance remains obscure in cassava. In this study, changes of physiological characters and gene transcriptome profiles were investigated under dehydration stress simulated by polyethylene glycol (PEG) treatments. Five traits, including peroxidase (POD) activity, proline content, malondialdehyde (MDA), soluble sugar and soluble protein, were all dramatically induced in response to PEG treatment. RNA-seq analysis revealed a gradient decrease of differentially expressed (DE) gene number in tissues from bottom to top of a plant, suggesting that cassava root has a quicker response and more induced/depressed DE genes than leaves in response to drought. Overall, dynamic changes of gene expression profiles in cassava root and leaves were uncovered: genes related to glycolysis, abscisic acid and ethylene biosynthesis, lipid metabolism, protein degradation, and second metabolism of flavonoids were significantly induced, while genes associated with cell cycle/organization, cell wall synthesis and degradation, DNA synthesis and chromatin structure, protein synthesis, light reaction of photosynthesis, gibberelin pathways and abiotic stress were greatly depressed. Finally, novel pathways in ABA-dependent and ABA-independent regulatory networks underlying PEG-induced dehydration response in cassava were detected, and the RNA-Seq results of a subset of fifteen genes were confirmed by real-time PCR. The findings will improve our understanding of the mechanism related to dehydration stress-tolerance in cassava and will provide useful candidate genes for breeding of cassava varieties better adapted to drought environment. PMID:26927071

  18. Application of prompt gamma-ray activation analysis

    Energy Technology Data Exchange (ETDEWEB)

    Chung, Yong Sam; Park, Kwang Won; Moon, Jong Hwa; Kim, Sun Ha; Baek, Sung Ryel [Korea Atomic Energy Research Institute, Taejeon (Korea)

    2002-03-01

    This technical report is written for the promotion to utilization of prompt gamma-ray activation analysis facility to be installed in HANARO reactor. It is described for a practical aspects including experiment and equipments, methodology, current status of the research and development and its applications. 102 refs., 32 figs., 25 tabs. (Author)

  19. Making Sense of Total VET Activity: An Initial Market Analysis

    Science.gov (United States)

    National Centre for Vocational Education Research (NCVER), 2016

    2016-01-01

    Following the successful first national publication of total vocational education and training (VET) activity and presentation of various informative data products, NCVER has continued to undertake further analysis of the submitted data. This paper is the first in a suite of the National Centre for Vocational Education Research (NCVER) authored…

  20. Instrumental neutron activation analysis of some ayurvedic medicines: Pt. 1

    Energy Technology Data Exchange (ETDEWEB)

    Rajurkar, N.S.; Vinchurkar, M.S. (Poona Univ., Pune (India). Dept. of Chemistry)

    1992-12-01

    Several medicines have been manufactured and prescribed to overcome mineral deficiencies in the human body. Such medicines are mixtures of several components. The present work is undertaken to analyze various Ayurvedic medicines, mainly of herbal origin and used for different purposes, for their elemental contents, by neutron activation analysis. (author).

  1. Neutron activation analysis of final molasses from the sugar industry

    International Nuclear Information System (INIS)

    Molasses samples from 74 factories were analyzed by neutron activation analysis. The concentration values of the 35 elements was determined. The toxicity and the influence of the presence of theses elements in sugar loss in the molasses and fermentative process is discussed

  2. HMG-CoA reductase inhibitory activity and phytocomponent investigation of Basella alba leaf extract as a treatment for hypercholesterolemia.

    Science.gov (United States)

    Baskaran, Gunasekaran; Salvamani, Shamala; Ahmad, Siti Aqlima; Shaharuddin, Noor Azmi; Pattiram, Parveen Devi; Shukor, Mohd Yunus

    2015-01-01

    The enzyme 3-hydroxy-3-methyl-glutaryl-coenzyme A (HMG-CoA) reductase is the key enzyme of the mevalonate pathway that produces cholesterol. Inhibition of HMG-CoA reductase reduces cholesterol biosynthesis in the liver. Synthetic drugs, statins, are commonly used for the treatment of hypercholesterolemia. Due to the side effects of statins, natural HMG-CoA reductase inhibitors of plant origin are needed. In this study, 25 medicinal plant methanol extracts were screened for anti-HMG-CoA reductase activity. Basella alba leaf extract showed the highest inhibitory effect at about 74%. Thus, B. alba was examined in order to investigate its phytochemical components. Gas chromatography with tandem mass spectrometry and reversed phase high-performance liquid chromatography analysis revealed the presence of phenol 2,6-bis(1,1-dimethylethyl), 1-heptatriacotanol, oleic acid, eicosyl ester, naringin, apigenin, luteolin, ascorbic acid, and α-tocopherol, which have been reported to possess antihypercholesterolemic effects. Further investigation of in vivo models should be performed in order to confirm its potential as an alternative treatment for hypercholesterolemia and related cardiovascular diseases. PMID:25609924

  3. HMG-CoA reductase inhibitory activity and phytocomponent investigation of Basella alba leaf extract as a treatment for hypercholesterolemia

    Directory of Open Access Journals (Sweden)

    Baskaran G

    2015-01-01

    Full Text Available Gunasekaran Baskaran,1 Shamala Salvamani,1 Siti Aqlima Ahmad,1 Noor Azmi Shaharuddin,1 Parveen Devi Pattiram,2 Mohd Yunus Shukor1 1Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, 2Department of Food Technology, Faculty of Food Science and Technology, Universiti Putra Malaysia, Selangor, Malaysia Abstract: The enzyme 3-hydroxy-3-methyl-glutaryl-coenzyme A (HMG-CoA reductase is the key enzyme of the mevalonate pathway that produces cholesterol. Inhibition of HMG-CoA reductase reduces cholesterol biosynthesis in the liver. Synthetic drugs, statins, are commonly used for the treatment of hypercholesterolemia. Due to the side effects of statins, natural HMG-CoA reductase inhibitors of plant origin are needed. In this study, 25 medicinal plant methanol extracts were screened for anti-HMG-CoA reductase activity. Basella alba leaf extract showed the highest inhibitory effect at about 74%. Thus, B. alba was examined in order to investigate its phytochemical components. Gas chromatography with tandem mass spectrometry and reversed phase high-performance liquid chromatography analysis revealed the presence of phenol 2,6-bis(1,1-dimethylethyl, 1-heptatriacotanol, oleic acid, eicosyl ester, naringin, apigenin, luteolin, ascorbic acid, and a-tocopherol, which have been reported to possess antihypercholesterolemic effects. Further investigation of in vivo models should be performed in order to confirm its potential as an alternative treatment for hypercholesterolemia and related cardiovascular diseases. Keywords: HMG-CoA reductase, Basella alba, phytochemical, GC-MS/MS, RP-HPLC, hypercholesterolemia

  4. Molecular characterization of two microalgal strains in Egypt and investigation of the antimicrobial activity of their extracts

    Directory of Open Access Journals (Sweden)

    El Semary, NA.

    2013-01-01

    Full Text Available The emergence of new pathogens and the increasing drug-resistance of recognized ones pose a difficult challenge. One way that this challenge is being addressed is through the discovery of new cost-effective drug resources in the form of bioactive compounds. Algae represent a promising source of bioactive compounds in this regard. In the present research, we used molecular and phylogenetic analysis to isolate and identify two microalgal strains. We found that one strain belonged to the phylum chrysophyta and the other to the cyanobacteria. We also investigated the antimicrobial activity of some of the lipophilic extracts of the two microalgal strains. Several fractions showed high individual antimicrobial bioactivity against multidrug-resistant Salmonella sp., Citrobacter sp., Aspergillus niger and Aspergillus flavus. Fraction III from Poterioochromonas malhamensis showed the highest level of activity against two multidrug-resistant bacterial pathogens. The inhibition zone diameter was 1.4 cm for Salmonella and 1.4 cm for Citrobacter. Meanwhile, another lipophilic fraction from the cyanobacterium Synechocystis salina showed broad-spectrum bioactivity (inhibition zone diameter of 0.9 cm for Aspergillus niger, 1 cm for Citrobacter and 0.9 cm for Salmonella. One lipophilic fraction from Aphanizomenon showed antifungal bioactivity against Aspergillus niger and Aspergillus flavus, where the inhibition zone diameter was 1.1 cm and 1.0 cm, respectively. The study highlights the antimicrobial bioactivity of extracts from local microalgae and emphasizes the importance of carrying out screening programs for those microorganisms.

  5. Chemical Investigation and Hypotensive Activity study on some Myanmar Indigenous Medicinal Plants used in the Treatement of Hypertension

    International Nuclear Information System (INIS)

    Study of Myanmar indigenous medicinal plants used in the treatment of hypertension was conducted. The samples studied were Gant-ka-lar (Gisekia pharnaceoides), Dant-da-lun (Moringa oleifera), Egayit (Millingtonia hortensis), Sue-pan (Carthamus tinctarius), Kauk-yoe-nwe (Oxystelma esculentum), Shauk (Citrus medica) Kyet-lei-san (Vitex glabrata), and Sin-ngo-myet (Eleusine indica). In all these samples, determination of potassium had been conducted through its natural K activity by high purity germanium gamma counter and by NaI (Tl) selective channel and 'Aloka' gross gamma scintillation counters. Quantitative determination of the two elements (Na, K) and nine elements (Mg, Ca, Cr, Fe, Cu, Zn, As, Cd, Pb) in these samples were carried out by flame photometry and atomic absorption spectrophotometry (AAS), respectively. In addition, elemental analysis for these samples was conducted by using energy dispersive X-ray fluorescence (EDXRF) spectrometry. Moreover, organic compounds present in water extracts of Gant-ka-lar and Dant-da-lun were studied by phytochemical investigation. The hypotensive activities of different water extracts of Gant-ka-lar and Dant-da-lun were studied by using tail cuff method employing ''Wistar-kyoto'' rats. It was found that gant-Ka-Lar to be most effective in the treatment of hypertension

  6. Kinetics, equilibrium, and thermodynamics investigation on the adsorption of lead(II) by coal-based activated carbon.

    Science.gov (United States)

    Yi, Zhengji; Yao, Jun; Zhu, Mijia; Chen, Huilun; Wang, Fei; Liu, Xing

    2016-01-01

    The goal of this research is to investigate the feasibility of using activated coal-based activated carbon (CBAC) to adsorb Pb(II) from aqueous solutions through batch tests. Effects of contact time, pH, temperature and initial Pb(II) concentration on the Pb(II) adsorption were examined. The Pb(II) adsorption is strongly dependent on pH, but insensitive to temperature. The best pH for Pb(II) removal is in the range of 5.0-5.5 with more than 90 % of Pb(II) removed. The equilibrium time was found to be 60 min and the adsorption data followed the pseudo-second-order kinetics. Isotherm data followed Langmuir isotherm model with a maximum adsorption capacity of 162.33 mg/g. The adsorption was exothermic and spontaneous in nature. The Fourier transform infrared spectroscopy and scanning electron microscopy analysis suggested that CBAC possessed a porous structure and was rich in carboxyl and hydroxyl groups on its surface, which might play a major role in Pb(II) adsorption. These findings indicated that CBAC has great potential as an alternative adsorbent for Pb(II) removal. PMID:27504258

  7. Recent applications of neutron activation analysis in Korea

    International Nuclear Information System (INIS)

    There are two purposes in this research; first aim is to promote the use of neutron activation analysis (NAA) as a utilization of nuclear research reactor in the field of air pollution studies through a routine and long-term monitoring. Other is to improve NAA with an experimental simplicity, high accuracy, excellent flexibility with respect to irradiation and counting conditions. For the study on air pollution, airborne particulate matter (APM) for the fine (< 2.5 μm EAD) and coarse particle (2.5-10 μm EAD) fractions were collected using the Gent stacked filter unit low volume sampler and two types of Nuclepore polycarbonate filters. Air samples were collected at two regions (suburban and industrial site of Daejeon city in the Republic of Korea) from January to December 2002. Mass concentration and elemental black carbon of APM were measured and the concentration of 25 elements were determined by Instrumental NAA. Analytical quality control is carried out using three certified reference materials (CRM). The monitoring data were treated statistically to assess air pollution source and source apportionment. The results obtained from this project can be used to investigate source identification and apportionment and its trends, and to establish a more cost-effective method for national air quality management. Preliminary experiment for application of ko-standardization method has been carried out to determine the reactor neutron spectrum parameters, i.e.a and f-values as the main factors of irradiation quality at NAA no.1 irradiation hole on HANARO research reactor, to determine peak detection efficiency for the HP Ge(EG and G ORTEC, GEM 35185) detector for the use in the ko-experiments and to compare the measured concentration results with the certified values of some CRMs applying the experimentally determined ko-parameters. (author)

  8. Smog Chamber Investigation on the Iron-Catalyzed Activation of Chloride from Modeled Saltpans

    Science.gov (United States)

    Wittmer, Julian; Bleicher, Sergej; Oeste <, Franz Dietrich; Zetzsch, Cornelius

    2014-05-01

    Halogen activation on sea spray aerosols and other halide surfaces and thus the formation of reactive halogen species (RHS), influencing trace and greenhouse gases, has become an important topic of research in recent years. In this context the chloride and bromide activation, in particular the formation of RHS by photochemically induced halogen release from (sea) salt surface and reactions with ozone (O3) and nitrogen oxides (NOx), came into focus [1,2]. Our studies concentrate on the quantification of atomic chlorine (Cl), bromine (Br) and hydroxyl (OH) radicals in the gas phase above lab-models of salt pans, enriched in iron(III) chloride (FeCl3), that are exposed to simulated sunlight in a smog chamber. The applied radical clock method [3] results in time profiles and source strengths for Cl, Br and OH, which are combined with the various compositions of humidified salts. In particular, the influence of bromine, sulfate, oxalate, and catechol on the FeCl3 enriched salt is investigated. Comparable investigations only exist for the aqueous phase chemistry of FeCl3 (e.g. [4]). Driven by the photolytic reduction from Fe(III) to Fe(II), an enormous amount of chlorine atoms (>107 cm-3) could be detected for sodium chloride (NaCl) salt pans with low addition of FeCl3 (0.5 - 2 wt%), even in an O3 and NOx free environment. The Cl2 source strength reaches a maximum of 8×1011 Cl2 molecules per cm3 within the first hour of the experiment, corresponding to a Cl2 mixing ratio of 30 ppbv at standard pressure. These concentrations exceeded the release above pure NaCl samples by a factor of 1000. A crucial factor for the Cl2 release is the pH and thus the formation of iron(III) complexes on the salt crystals that differ in their sensitivity for photolysis. Whereas the presence of sodium bromide normally strengthens the chlorine release, a suppression accompanied by strong bromine activation (>1010 cm-3) could be observed for iron enriched samples. Furthermore, the addition of

  9. Development of HANARO Activation Analysis System and Utilization Technology

    Energy Technology Data Exchange (ETDEWEB)

    Chung, Y. S.; Moon, J. H.; Cho, H. J. (and others)

    2007-06-15

    1. Establishment of evaluation system using a data for a neutron activation analysis : Improvement of NAA measurement system and its identification, Development of combined data evaluation code of NAA/PGAA, International technical cooperation project 2. Development of technique for a industrial application of high precision gamma nuclide spectroscopic analysis : Analytical quality control, Development of industrial application techniques and its identification 3. Industrial application research for a prompt gamma-ray activation analysis : Improvement of Compton suppression counting system (PGAA), Development of applied technology using a PGAA system 4. Establishment of NAA user supporting system and KOLAS management : Development and validation of KOLAS/ISO accreditation testing and identification method, Cooperation researches for a industrial application, Establishment of integrated user analytical supporting system, Accomplishment of sample irradiation facility.

  10. Development of HANARO Activation Analysis System and Utilization Technology

    International Nuclear Information System (INIS)

    1. Establishment of evaluation system using a data for a neutron activation analysis : Improvement of NAA measurement system and its identification, Development of combined data evaluation code of NAA/PGAA, International technical cooperation project 2. Development of technique for a industrial application of high precision gamma nuclide spectroscopic analysis : Analytical quality control, Development of industrial application techniques and its identification 3. Industrial application research for a prompt gamma-ray activation analysis : Improvement of Compton suppression counting system (PGAA), Development of applied technology using a PGAA system 4. Establishment of NAA user supporting system and KOLAS management : Development and validation of KOLAS/ISO accreditation testing and identification method, Cooperation researches for a industrial application, Establishment of integrated user analytical supporting system, Accomplishment of sample irradiation facility

  11. Use of activation analysis of hair in environmental protection

    International Nuclear Information System (INIS)

    Human hair is very suitable for use in environmental control monitoring because trace elements concentrate in it at higher levels than in most other organs. Unlike in other biological materials, the trace element contents in hair can be determined by instrumental neutron activation analysis (INAA), as the interference by 24Na can be eliminated by appropriate washing of hair, e.g., using the procedure recommended by IAEA. The methods of sampling, washing and sample analysis using INAA and neutron activation analysis with radiochemical separation are described including the recommended way of the presentation of results. The results are presented of analyses for trace elements in hair from both little and highly polluted areas. (Ha)

  12. Investigation of the heavy metal pollution of Danube delta sediments by TTPIXE analysis

    International Nuclear Information System (INIS)

    The elemental composition of sediments collected from some Danube Delta lakes (Malita, Furtuna, Lund, Mester and Sinoe), which are located in active sedimentary zones, was investigated by using two complementary methods: thick target proton-induced X-ray emission (TTPIXE) and instrumental neutron activation analysis (INAA) or X-ray fluorescence (XRF). The goal was to obtain a complete survey of heavy metal pollution and reconstruct recent pollution history in these Danube Delta lakes. Vertical distribution was analyzed, except for the case of Sinoe Lake, from which samples were collected only at the surface. During PIXE measurements, the pellets of 12 mm diameter and ∼ 1.5 mm thickness were bombarded using 3 MeV proton beams delivered by the FN-Tandem accelerator of IFIN-HH. The X-ray spectra were measured with a Ge-HP detector of 180 eV/5.9 KeV energy resolution for some micro.C charge accumulation. Control samples of reference sediments (IAEA, SL-1 and SOIL-7) prepared in the same conditions were also measured. Corrections were made for proton stopping and X-ray self-attenuation in the thick samples. Thirty-eight samples from the first four lakes and 7 samples from Sinoe Lake were analyzed, and the concentrations of 27 elements in every sample were determined by TTPIXE method. The following elements: S, Ca, Ti, Mn, Ni, Ga, Pb, and Hg could not be determined by INAA in our conditions. A typical measured spectrum where the presence of various pollutant elements is shown. Five elements - As, Br, Cr, Sb and Zn - were identified as pollutants by INAA method, showing concentrations about 1.5-2 x larger at the sediments surface. The vertical distribution of the presumed pollutant elements generally reflected the pollution history of the Danube Delta, namely a steady increase in pollution till the end of the 1980s, which can be associated with intense industrialization of Central and Eastern European countries prior to 1990. We think the interplay with TTPIXE method

  13. INVESTIGATION OF LEADERSHIP BEHAVIOR OF HIGH SCHOOL STUDENTS PARTICIPATING IN SPORTING RECREATION ACTIVITIES

    Directory of Open Access Journals (Sweden)

    Tugay

    2015-01-01

    Full Text Available In this study, with the aim of examining the size of the leadership in understanding the behavior of high school students participating in sports recreation activities it is a descriptive study. 206 women studying at different high schools in the province of Gaziantep research group, which consisted of 392 students, including 186 men. Data collection tool for research, Halpin and Winer (1957 developed by (Leader Behavior Description Qestionnair a LBDQ scale, Turkish translated into shape Atar and Uzbek (2009 scale used by is used. In the original scale on leadership behavior, setting up the structure 15 and 15 it is also included 30 items, including the size show understanding. But the concept has been applied only to show the dimensions of the research. SPSS 16.0 software package was used for the analysis of the study data. Descriptive statistics to analyze the data (Percentage, Frequency, ANOVA, t-test was used for statistical methods, and multiple groups for two groups. The significance level in statistical analysis has been accepted as p <0.05. The Cronbach's alpha coefficients for internal consistency was 0.726 Students work in gender, was looking at the relationship between understanding in terms of size and attended by the sport they found that grade level. As a result, there is a significant difference in the size of showing leadership behavior understanding by gender of those surveyed, is not a difference in the size of showing leadership behavior understanding between classes, it is seen that there are significant differences according to they have done sports.

  14. An ecosystem analysis of the activated sludge microbial community.

    Science.gov (United States)

    Yiannakopoulou, Trissevyene V

    2010-01-01

    This study was undertaken (i) to investigate the interactions of the activated sludge microbial community in a chemostat with the "environment", such as the substrate composition and variations, (ii) to investigate how these interactions affect the quality of the treated effluent and (iii) to determine the limits or applicability conditions to the indicators and to the prediction potential of the treated effluent quality. This work presents (a) the experimental results obtained from a reactor fed municipal wastewater (Data Set2-DS2) concerning the reactor's operating conditions and the microbial community of the sludge (b) comparisons between DS2 and an older Data Set (DS1) obtained when the reactor was fed synthetic substrate, all other experimental conditions being identical, and (c) simulation results and sensitivity analyses of two model runs (R1 and R2, corresponding to DS1 and DS2). The first trophic level (P(1)) of the DS2 microbial community consisted of bacteria, the second trophic level (P(2)) of bacteria-eating protozoa, rotifers and nematodes and the third trophic level (P(3)) of carnivorous protozoa and arthropods. Rotifers were an important constituent of the DS2 microbial community. The DS1 and DS1 communities differed in total size, trophic level sizes and species composition. Correlations between the major microbial groups of DS2 community and either loading rates or effluent quality attributes were generally low, but the correlation of bacteria with SVI and ammonia in the effluent was better. Also, the ratio of rotifers to protozoa in P(2) was correlated to BOD in the effluent. The results of this work indicate that predictions of the treated effluent quality based only on protozoa may not be safe. Sensitivity analysis of R2 run indicate that, when variation in Y and K(d) biokinetic coefficients of the sludge are combined with fluctuations in composition and quality of municipal wastewater entering the reactor, then sufficient significant

  15. Artifact suppression and analysis of brain activities with electroencephalography signals

    Institute of Scientific and Technical Information of China (English)

    Md. Rashed-Al-Mahfuz; Md. Rabiul Islam; Keikichi Hirose; Md. Khademul Islam Molla

    2013-01-01

    Brain-computer interface is a communication system that connects the brain with computer (or other devices) but is not dependent on the normal output of the brain (i.e., peripheral nerve and muscle). Electro-oculogram is a dominant artifact which has a significant negative influence on further analysis of real electroencephalography data. This paper presented a data adaptive technique for artifact suppression and brain wave extraction from electroencephalography signals to detect regional brain activities. Empirical mode decomposition based adaptive thresholding approach was employed here to suppress the electro-oculogram artifact. Fractional Gaussian noise was used to determine the threshold level derived from the analysis data without any training. The purified electroencephalography signal was composed of the brain waves also called rhythmic components which represent the brain activities. The rhythmic components were extracted from each electroencephalography channel using adaptive wiener filter with the original scale. The regional brain activities were mapped on the basis of the spatial distribution of rhythmic components, and the results showed that different regions of the brain are activated in response to different stimuli. This research analyzed the activities of a single rhythmic component, alpha with respect to different motor imaginations. The experimental results showed that the proposed method is very efficient in artifact suppression and identifying individual motor imagery based on the activities of alpha component.

  16. An investigation and analysis of the situation of sports activity development by university labor unions in Guangzhou University Town%广州大学城高校工会体育活动开展状况调查分析

    Institute of Scientific and Technical Information of China (English)

    林闻凯

    2014-01-01

    为了解高校工会组织开展体育活动的状况并探索优化对策,采用自编问卷对广州大学城10所高校1100名教工进行调查与访谈。研究表明:1)工会组织应当超越“机构职责”和“岗位压力”,基于教工需求提升工会体育活动的吸引力和凝聚力;2)工会应主动加强各高校基层体育社团建设,构建适应面宽、特色鲜明、可持续性强的系列化体育项目;3)工会应基于高校学科类型、教工结构、跨校区差异等现实状况,创新性地优化体育设施惠及率与服务制度保障;4)工会应将影响教工参与体育活动的制约因素加以分类管理,整合各方资源,有针对性地排除障碍、创造便利。%In order to have an insight into the situation of sports activity development by university labor unions and probe into strategies for optimization, the author investigated and interviewed 1 100 staff in 10 universities in Guang-zhou University Town by using a questionnaire made by the author, and put forward the following opinions:1)labor unions should promote the attraction and cohesion of labor union sports activities based on“staff needs”and by ex-ceeding their “institutional responsibility” and overcoming their “post pressure”; 2)labor unions should initiatively strengthen fundamental university sports association construction, build a series of widely applicable, feature distinctive and highly sustainable sports projects;3)labor unions should innovatively optimize sports facility beneficial rate and service system assurance based realistic conditions such as university discipline type, staff structure, cross campus dif-ference etc.;4)labor unions should sort and manage restraining factors which affect staff participating in sports activi-ties, integrate various resources, and remove obstacles and crease conveniences in an action specific manner.

  17. Analysis of Some Egyptian Cosmetic Samples by Fast Neutron Activation Analysis

    CERN Document Server

    Medhat, M E; Fayez-Hassan, M

    2001-01-01

    A description of D-T neutron generator (NG) is presented. This generator can be used for fast neutron activation analysis applied to determine some selected elements, especially light elements, in different materials. In our work, the concentration of the elements Na, Mg, Al, Si, K, Cl, Ca and Fe, were determined in two domestic brands of face powder by using 14 MeV neutron activation analysis.

  18. Landsat Imagery-Based Above Ground Biomass Estimation and Change Investigation Related to Human Activities

    Directory of Open Access Journals (Sweden)

    Chaofan Wu

    2016-02-01

    Full Text Available Forest biomass is a significant indicator for substance accumulation and forest succession, and a spatiotemporal biomass map would provide valuable information for forest management and scientific planning. In this study, Landsat imagery and field data cooperated with a random forest regression approach were used to estimate spatiotemporal Above Ground Biomass (AGB in Fuyang County, Zhejiang Province of East China. As a result, the AGB retrieval showed an increasing trend for the past decade, from 74.24 ton/ha in 2004 to 99.63 ton/ha in 2013. Topography and forest management were investigated to find their relationships with the spatial distribution change of biomass. In general, the simulated AGB increases with higher elevation, especially in the range of 80–200 m, wherein AGB acquires the highest increase rate. Moreover, the forest policy of ecological forest has a positive effect on the AGB increase, particularly within the national level ecological forest. The result in this study demonstrates that human activities have a great impact on biomass distribution and change tendency. Furthermore, Landsat image-based biomass estimates would provide illuminating information for forest policy-making and sustainable development.

  19. Investigating the nuclear activity of barred spiral galaxies: the case of NGC 1672

    CERN Document Server

    Jenkins, L P; Colbert, E J M; Koribalski, B; Kuntz, K D; Levan, A J; Ojha, R; Roberts, T P; Ward, M J; Zezas, A

    2011-01-01

    We have performed an X-ray study of the nearby barred spiral galaxy NGC1672, primarily to ascertain the effect of the bar on its nuclear activity. We use both Chandra and XMM-Newton observations to investigate its X-ray properties, together with supporting high-resolution optical imaging data from the Hubble Space Telescope (HST), infrared imaging from the Spitzer Space Telescope, and ATCA ground-based radio data. We detect 28 X-ray sources within the D25 area of the galaxy, many of which correlate spatially with star-formation in the bar and spiral arms, while two are identified as background galaxies in the HST images. Nine of the X-ray sources are ULXs, with the three brightest (LX > 5E39 erg/s) located at the ends of the bar. With the spatial resolution of Chandra, we are able to show for the first time that NGC1672 possesses a hard (Gamma~1.5) nuclear X-ray source with a 2-10 keV luminosity of 4E38 erg/s. This is surrounded by an X-ray bright circumnuclear star-forming ring, comprised of point sources an...

  20. Experimental investigation on the thermal performance of heat storage walls coupled with active solar systems

    Science.gov (United States)

    Zhao, Chunyu; You, Shijun; Zhu, Chunying; Yu, Wei

    2016-02-01

    This paper presents an experimental investigation of the performance of a system combining a low-temperature water wall radiant heating system and phase change energy storage technology with an active solar system. This system uses a thermal storage wall that is designed with multilayer thermal storage plates. The heat storage material is expanded graphite that absorbs a mixture of capric acid and lauric acid. An experiment is performed to study the actual effect. The following are studied under winter conditions: (1) the temperature of the radiation wall surface, (2) the melting status of the thermal storage material in the internal plate, (3) the density of the heat flux, and (4) the temperature distribution of the indoor space. The results reveal that the room temperature is controlled between 16 and 20 °C, and the thermal storage wall meets the heating and temperature requirements. The following are also studied under summer conditions: (1) the internal relationship between the indoor temperature distribution and the heat transfer within the regenerative plates during the day and (2) the relationship between the outlet air temperature and inlet air temperature in the thermal storage wall in cooling mode at night. The results indicate that the indoor temperature is approximately 27 °C, which satisfies the summer air-conditioning requirements.