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Sample records for mil hystochemical study

  1. 1 mil gold bond wire study.

    Energy Technology Data Exchange (ETDEWEB)

    Huff, Johnathon; McLean, Michael B.; Jenkins, Mark W.; Rutherford, Brian Milne

    2013-05-01

    In microcircuit fabrication, the diameter and length of a bond wire have been shown to both affect the current versus fusing time ratio of a bond wire as well as the gap length of the fused wire. This study investigated the impact of current level on the time-to-open and gap length of 1 mil by 60 mil gold bond wires. During the experiments, constant current was provided for a control set of bond wires for 250ms, 410ms and until the wire fused; non-destructively pull-tested wires for 250ms; and notched wires. The key findings were that as the current increases, the gap length increases and 73% of the bond wires will fuse at 1.8A, and 100% of the wires fuse at 1.9A within 60ms. Due to the limited scope of experiments and limited data analyzed, further investigation is encouraged to confirm these observations.

  2. Synthesis and Characterization Studies of MIL-101

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    Emine Kaya EKİNCİ

    2017-12-01

    Full Text Available MIL-101 is a kind of Metal Organic Frameworks (MOFs, which have attracted much attention in the past decade due to its promising application in chemical industries. MIL-101 is also known as “Porous Chromium Terephthalate”. It has very high surface area and pore volume. MIL-101 exhibits exceptional stability against moisture and other chemicals and is composed of coordinately unsaturated Cr- sites with high concentration available for catalysis and adsorption. MIL-101 was synthesized by hydrothermal method and characterized by XRD, nitrogen adsorption and desorption analyses and SEM. XRD patterns show the presence of MIL-101’s crystal structure with high surface area (~2400 m2/g. Nitrogen adsorption-desorption analyzes showed that the material exhibited mesoporous material behavior.

  3. Study on adsorption refrigeration performance of MIL-101-isobutane working pair

    International Nuclear Information System (INIS)

    Ma, Liejun; Yang, Huan; Wu, Qi; Yin, Yu; Liu, Zongjian; Cui, Qun; Wang, Haiyan

    2015-01-01

    Rising concerns about pro-environment and energy conservation bring about the escalating interests in adsorption cooling systems using renewable energy. Adsorption chillers with common refrigerants (water, ethanol, methanol, etc.) face the problem that advanced technologies and intricate design considerations are required to maintain high vacuum. This paper aims at the parameters optimization of adsorption system being operated with the novel working pair, MIL-101-isobutane, under typical conditions of ice making and air-condition. Adsorption isotherms and dynamic of isobutane on MIL-101 are discussed simultaneously. When the hot water inlet temperature, cooling water temperature and desorption time are 95 °C, 30 °C and 30 min, respectively, the cooling capacity is 45.7 kJ/kg, which is 1.7 times as much as that of activated carbon–isobutane pair. Structural stability of MIL-101 subjected to 500 times adsorption/desorption cycles has been successfully verified by XRD (X-ray diffraction). - Highlights: • Adsorption isotherms and kinetic of isobutane on MIL-101 were studied. • A single bed adsorption chiller with MIL-101-isobutane pair was built. • System performed better than that using activated carbon–isobutane pair. • Stability of MIL-101 subjected to 500 ad/desorption cycles has been verified.

  4. Glucose recovery from aqueous solutions by adsorption in metal–organic framework MIL-101: a molecular simulation study

    Science.gov (United States)

    Gupta, Krishna M.; Zhang, Kang; Jiang, Jianwen

    2015-01-01

    A molecular simulation study is reported on glucose recovery from aqueous solutions by adsorption in metal-organic framework MIL-101. The F atom of MIL-101 is identified to be the most favorable adsorption site. Among three MIL-101-X (X = H, NH2 or CH3), the parent MIL-101 exhibits the highest adsorption capacity and recovery efficacy. Upon functionalization by -NH2 or -CH3 group, the steric hindrance in MIL-101 increases; consequently, the interactions between glucose and framework become less attractive, thus reducing the capacity and mobility of glucose. The presence of ionic liquid, 1-ethyl-3-methyl-imidazolium acetate, as an impurity reduces the strength of hydrogen-bonding between glucose and MIL-101, and leads to lower capacity and mobility. Upon adding anti-solvent (ethanol or acetone), a similar adverse effect is observed. The simulation study provides useful structural and dynamic properties of glucose in MIL-101, and it suggests that MIL-101 might be a potential candidate for glucose recovery. PMID:26242874

  5. Glucose recovery from aqueous solutions by adsorption in metal-organic framework MIL-101: a molecular simulation study.

    Science.gov (United States)

    Gupta, Krishna M; Zhang, Kang; Jiang, Jianwen

    2015-08-05

    A molecular simulation study is reported on glucose recovery from aqueous solutions by adsorption in metal-organic framework MIL-101. The F atom of MIL-101 is identified to be the most favorable adsorption site. Among three MIL-101-X (X = H, NH2 or CH3), the parent MIL-101 exhibits the highest adsorption capacity and recovery efficacy. Upon functionalization by -NH2 or -CH3 group, the steric hindrance in MIL-101 increases; consequently, the interactions between glucose and framework become less attractive, thus reducing the capacity and mobility of glucose. The presence of ionic liquid, 1-ethyl-3-methyl-imidazolium acetate, as an impurity reduces the strength of hydrogen-bonding between glucose and MIL-101, and leads to lower capacity and mobility. Upon adding anti-solvent (ethanol or acetone), a similar adverse effect is observed. The simulation study provides useful structural and dynamic properties of glucose in MIL-101, and it suggests that MIL-101 might be a potential candidate for glucose recovery.

  6. The studies on gas adsorption properties of MIL-53 series MOFs materials

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    Yuqiu Jiao

    2017-08-01

    Full Text Available Molecular dynamics (MD, grand canonical Monte Carlo (GCMC and ideal adsorbed solution theory (IAST were used to study the structures and gas adsorption properties of MIL-53(M[M=Cr, Fe, Sc, Al] metal organic framework (MOF materials. The results show that the volumes of those MOF materials increase significantly at high temperature. By analyzing the adsorption isotherms, we found that the temperature had a paramount effect on the gas adsorption behaviors of these MOF materials. For MIL-53(Cr, the orders of the quantities of adsorbed gases were CH4>N2>CO2>H2S, CH4>H2S>CO2>N2 and CH4>CO2>H2S>N2 at 100K, 293K and 623K, respectively. We also calculated the adsorption of several combinations of two gases by MIL-53(Cr at 293K, the results indicate that the material had selective adsorption of CH4 over CO2, H2S and N2. Our calculations provide microscopic insights into the gas adsorption performances of these MOFs and may further guide the practice of gas separation.

  7. The studies on gas adsorption properties of MIL-53 series MOFs materials

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    Jiao, Yuqiu; Li, Zhenyu; Ma, Yue; Zhou, Guanggang; Wang, Shuangxi; Lu, Guiwu

    2017-08-01

    Molecular dynamics (MD), grand canonical Monte Carlo (GCMC) and ideal adsorbed solution theory (IAST) were used to study the structures and gas adsorption properties of MIL-53(M)[M=Cr, Fe, Sc, Al] metal organic framework (MOF) materials. The results show that the volumes of those MOF materials increase significantly at high temperature. By analyzing the adsorption isotherms, we found that the temperature had a paramount effect on the gas adsorption behaviors of these MOF materials. For MIL-53(Cr), the orders of the quantities of adsorbed gases were CH4>N2>CO2>H2S, CH4>H2S>CO2>N2 and CH4>CO2>H2S>N2 at 100K, 293K and 623K, respectively. We also calculated the adsorption of several combinations of two gases by MIL-53(Cr) at 293K, the results indicate that the material had selective adsorption of CH4 over CO2, H2S and N2. Our calculations provide microscopic insights into the gas adsorption performances of these MOFs and may further guide the practice of gas separation.

  8. Petits mils

    International Development Research Centre (IDRC) Digital Library (Canada)

    cinq fois moins d'eau que le riz ? Note d'analyse ... dont une teneur élevée en micronutriments et en fibres alimentaires et un indice glycémique faible. ... Malgré les qualités nutritionnelles supérieures et la résilience au climat des petits mils, ...

  9. Theoretical study of carbon dioxide adsorption and diffusion in MIL-127(Fe) metal organic framework

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    Pongsajanukul, Pavee; Parasuk, Vudhichai; Fritzsche, Siegfried; Assabumrungrat, Suttichai; Wongsakulphasatch, Suwimol; Bovornratanaraks, Thiti; Chokbunpiam, Tatiya

    2017-07-01

    The UFF force field is found to reproduce the adsorption isotherm of carbon dioxide in MIL-127(Fe) well. It has therefore been used to investigate the structure and self-diffusion of carbon dioxide molecules in the MIL which is a candidate for membrane or adsorption application. The structure of the adsorbed phase shows different regions of high concentration. The highest particle concentration was found in the central regions of the channels. The self-diffusion coefficient slightly increases with the loading for low concentration of guest molecules while for higher concentrations it decreases because of mutual hindrance of guest molecules.

  10. Pulse gas chromatographic study of adsorption of substituted aromatics and heterocyclic molecules on MIL-47 at zero coverage.

    Science.gov (United States)

    Duerinck, Tim; Couck, Sarah; Vermoortele, Frederik; De Vos, Dirk E; Baron, Gino V; Denayer, Joeri F M

    2012-10-02

    The low coverage adsorptive properties of the MIL-47 metal organic framework toward aromatic and heterocyclic molecules are reported in this paper. The effect of molecular functionality and size on Henry adsorption constants and adsorption enthalpies of alkyl and heteroatom functionalized benzene derivates and heterocyclic molecules was studied using pulse gas chromatography. By means of statistical analysis, experimental data was analyzed and modeled using principal component analysis and partial least-squares regression. Structure-property relationships were established, revealing and confirming several trends. Among the molecular properties governing the adsorption process, vapor pressure, mean polarizability, and dipole moment play a determining role.

  11. Comparative Study of MIL-96(Al) as Continuous Metal-Organic Frameworks Layer and Mixed-Matrix Membrane.

    Science.gov (United States)

    Knebel, Alexander; Friebe, Sebastian; Bigall, Nadja Carola; Benzaqui, Marvin; Serre, Christian; Caro, Jürgen

    2016-03-23

    MIL-96(Al) layers were prepared as supported metal-organic frameworks membrane via reactive seeding using the α-alumina support as the Al source for the formation of the MIL-96(Al) seeds. Depending on the solvent mixture employed during seed formation, two different crystal morphologies, with different orientation of the transport-active channels, have been formed. This crystal orientation and habit is predefined by the seed crystals and is kept in the subsequent growth of the seeds to continuous layers. In the gas separation of an equimolar H2/CO2 mixture, the hydrogen permeability of the two supported MIL-96(Al) layers was found to be highly dependent on the crystal morphology and the accompanied channel orientation in the layer. In addition to the neat supported MIL-96(Al) membrane layers, mixed-matrix membranes (MMMs, 10 wt % filler loading) as a composite of MIL-96(Al) particles as filler in a continuous Matrimid polymer phase have been prepared. Five particle sizes of MIL-96(Al) between 3.2 μm and 55 nm were synthesized. In the preparation of the MIL-96(Al)/Matrimid MMM (10 wt % filler loading), the following preparation problems have been identified: The bigger micrometer-sized MIL-96(Al) crystals show a trend toward sedimentation during casting of the MMM, whereas for nanoparticles aggregation and recrystallization to micrometer-sized MIL-96(Al) crystals has been observed. Because of these preparation problems for MMM, the neat supported MIL-96(Al) layers show a relatively high H2/CO2 selectivity (≈9) and a hydrogen permeance approximately 2 magnitudes higher than that of the best MMM.

  12. Adsorption of 1,2-dichlorobenzene and 1,2,4-trichlorobenzene in nano- and microsized crystals of MIL-101(Cr): static and dynamic gravimetric studies.

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    Bullot, Laetitia; Vieira-Sellaï, Ludivine; Chaplais, Gérald; Simon-Masseron, Angélique; Daou, Toufic Jean; Patarin, Joël; Fiani, Emmanuel

    2017-12-01

    This work aims to highlight the promising adsorption capacity and kinetic of (poly)chlorobenzene pollutants in the hybrid MIL-101(Cr) type material for technological uses in industrial waste exhaust decontamination. The influence of the MIL-101(Cr) crystal size (nano- and microcrystals) on the adsorption behavior was studied in static and dynamic modes. For this purpose, crystals of MIL-101(Cr) in nano- and micrometric sizes were synthesized and fully characterized. Their sorption properties regarding 1,2-dichlorobenzene were examined using gravimetric method in dynamic (p/p° = 0.5) and static (p/p° = 1) modes at room temperature. 1,2,4-trichlorobenzene adsorption was only performed under static mode because of its too low vapor pressure. 1,2-dichlorobenzene and 1,2,4-trichlorobenzene were used to mimic 2,3-dichlorodibenzo-p-dioxin and 1,2,3,4-tetrachlorodibenzo-p-dioxin, respectively, and more largely dioxin compounds. Adsorptions of these probes were successfully carried out in nano- and microcrystals of MIL-101(Cr). Indeed, in static mode (p/p° = 1) and at room temperature, nanocrystals adsorb 2266 molecules of 1,2-dichlorobenzene and 2093 molecules of 1,2,4-trichlorobenzene per unit cell, whereas microcrystals adsorb 1871 molecules of 1,2-dichlorobenzene and 1631 molecules of 1,2,4-trichlorobenzene per unit cell. In dynamic mode, the 1,2-dichlorobenzene adsorbed amounts are substantially similar to those obtained in static mode. However, the adsorption kinetics are different because of a different scheme of diffusivity of the adsorbate between the two modes. To the best of our knowledge, these adsorption capacities of MIL-101(Cr) as adsorbent for polychlorobenzenes trapping have never been referenced. MIL-101(Cr) appears as a promising material for technological uses in industrial waste exhaust decontamination.

  13. Host-guest interaction of styrene and ethylbenzene in MIL-53 studied by solid-state NMR.

    Science.gov (United States)

    Li, Shenhui; Li, Jing; Tang, Jing; Deng, Feng

    Solid-state NMR was utilized to explore the host-guest interaction between adsorbate and adsorbent at atomic level to understand the separation mechanism of styrene (St) and ethylbenzene (EB) in MIL-53(Al). 13 C- 27 Al double-resonance NMR experiments revealed that the host-guest interaction between St and MIL-53 was much stronger than that of EB adsorption. In addition, 13 C DIPSHIFT experiments suggested that the adsorbed St was less mobile than EB confined inside the MIL-53 pore. Furthermore, the host-guest interaction model between St, EB and MIL-53 was established on the basis of the spatial proximities information extracted from 2D 1 H- 1 H homo-nuclear correlation NMR experiments. According to the experimental observation from solid-state NMR, it was found that the presence of π-π interaction between St and MIL-53 resulted in the stronger host-guest interaction and less mobility of St. This work provides direct experimental evidence for understanding the separation mechanism of St and EB using MIL-53 as an adsorbent. Copyright © 2017 Elsevier Inc. All rights reserved.

  14. Studying Antarctic Ordinary Chondrite (OC) and Miller Range (MIL) Nakhlite Meteorites to Assess Carbonate Formation on Earth and Mars

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    Evans, Michael Ellis

    Carbonates are found in meteorites collected from Antarctica. The stable isotope composition of these carbonates records their formation environment on either Earth or Mars. The first research objective of this dissertation is to characterize the delta18O and delta 13C values of terrestrial carbonates formed on Ordinary Chondrites (OCs) collected in regions near known martian meteorites. The second objective is to characterize the delta18O and delta13C values of martian carbonates from Nakhlites collected from the Miller Range (MIL). The third objective is to assess environmental changes on Mars since the Noachian period. The OCs selected had no pre-terrestrial carbonates so any carbonates detected are presumed terrestrial in origin. The study methodology is stepped extraction of CO2 created from phosphoric acid reaction with meteorite carbonate. Stable isotope results show that two distinct terrestrial carbonate species (Ca-rich and Fe/Mg-rich) formed in Antarctica on OCs from a thin-film of meltwater containing dissolved CO2. Carbon isotope data suggests the terrestrial carbonates formed in equilibrium with atmospheric CO2 delta 13C = -7.5‰ at >15°C. The wide variation in delta 18O suggests the carbonates did not form in equilibrium with meteoric water alone, but possibly formed from an exchange of oxygen isotopes in both water and dissolved CO2. Antarctica provides a model for carbonate formation in a low water/rock ratio, near 0°C environment like modern Mars. Nakhlite parent basalt formed on Mars 1.3 billion years ago and the meteorites were ejected by a single impact approximately 11 million years ago. They traveled thru space before eventually falling to the Earth surface 10,000-40,000 years ago. Nakhlite samples for this research were all collected from the Miller Range (MIL) in Antarctica. The Nakhlite stable isotope results show two carbonate species (Ca-rich and Fe/Mg-rich) with a range of delta18O values that are similar to the terrestrial OC

  15. Challenges in first-principles NPT molecular dynamics of soft porous crystals: A case study on MIL-53(Ga)

    Science.gov (United States)

    Haigis, Volker; Belkhodja, Yacine; Coudert, François-Xavier; Vuilleumier, Rodolphe; Boutin, Anne

    2014-08-01

    Soft porous crystals present a challenge to molecular dynamics simulations with flexible size and shape of the simulation cell (i.e., in the NPT ensemble), since their framework responds very sensitively to small external stimuli. Hence, all interactions have to be described very accurately in order to obtain correct equilibrium structures. Here, we report a methodological study on the nanoporous metal-organic framework MIL-53(Ga), which undergoes a large-amplitude transition between a narrow- and a large-pore phase upon a change in temperature. Since this system has not been investigated by density functional theory (DFT)-based NPT simulations so far, we carefully check the convergence of the stress tensor with respect to computational parameters. Furthermore, we demonstrate the importance of dispersion interactions and test two different ways of incorporating them into the DFT framework. As a result, we propose two computational schemes which describe accurately the narrow- and the large-pore phase of the material, respectively. These schemes can be used in future work on the delicate interplay between adsorption in the nanopores and structural flexibility of the host material.

  16. Fe II/Fe III mixed-valence state induced by Li-insertion into the metal-organic-framework Mil53(Fe): A DFT+U study

    Science.gov (United States)

    Combelles, C.; Ben Yahia, M.; Pedesseau, L.; Doublet, M.-L.

    The iron-based metal-organic-framework MIL53(Fe) has recently been tested as a cathode materials for Li-Ion batteries, leading to promising cycling life and rate capability. Despite a poor capacity of 70 mAh g -1 associated with the exchange of almost 0.5Li/Fe, this result is the first evidence of a reversible lithium insertion never observed in a MOF system. In the present study, the MIL53(Fe) redox mechanism is investigated through first-principles DFT+U calculations. The results show that MIL53(Fe) is a weak antiferromagnetic charge transfer insulator at T = 0 K, with iron ions in the high-spin S = 5/2 state. Its reactivity vs elemental lithium is then investigated as a function of lithium composition and distribution over the most probable Li-sites of the MOF structure. The redox mechanism is fully interpreted as a two-step insertion/conversion mechanism, associated with the stabilization of the Fe 3+/Fe 2+ mixed-valence state prior to the complete decomposition of the inorganic-organic interactions within the porous MOF architecture.

  17. Efeito da natação associado a diferentes dietas sobre o músculo tibial anterior do rato: estudo morfológico e histoquímico Efecto de la natación asociado a diferentes dietas sobre el músculo tibial anterior del ratón: estudio morfológico e histo-químico Effect of swimming associated with diet on the anterior tibial muscle of rats: morphological and hystochemical study

    Directory of Open Access Journals (Sweden)

    Olimpia Ciabattari

    2005-04-01

    anterior. Se usaron 24 ratones masculinos Wistar. Éstos fueron aleatoriamente divididos en 3 grupos: no especializado (control, el grupo especializado (2 x/sem y el grupo 2 especializado (5 x/sem. Cada grupo era dividido en 2 grupos que recibieron uno de las dietas: normal o hipercalórica. Después del periodo de entrenamiento las muestras del músculo fueron recogidas y reunido congeladas a -70ºC. Los cortes histológicos (8µm obtenidos con un micrótomo de criostato (-20º los mismos fueron sometidos a los métodos HE y NADH-TR, m-ATPase (pH 4,4 y Negro de Sudán. Se estimaron la morfología y el grado de la hipertrofia usando el método del diámetro más pequeño. Los datos se sometieron a prueba variable (ANOVA-one way. Las fibras musculares fueron clasificadas como SÓ, FOG y FG, presentando una distribución "de modelo en mosaico" en todos los grupos. Las fibras musculares revelaron una hipertrofia ligera en todos los grupos. Los pesos inicial y final fueron significativamente diferentes en los grupos especializados. Sobre todo en el grupo de 5 x/sem, de los grupos especializados, las fibras musculares revelaron hipertrofia, splitting, e con algunos mionúcleos internos. Algunas fibras se revelaron atróficas, y esta observación hizo pensar en una denervación. La oxidación del metabolismo SÓ era más intensa en las fibras y en el FOG; no había alteraciones en la habilidad contráctil del músculo y el tenor de lípidos en el grupo SÓ era intenso en las fibras, moderado en el FOG y débil en FG. El estudio presente, con este protocolo, en los grupos entrenados de 2 x/sem y 5 x/sem, causó tipos diferentes de lesiones morfológicas en las fibras. Los de dieta hipercalórica no provocaron resultados estadísticamente significativos comparados con los de la dieta normal.The objective of this study was to investigate the effect of the association of different swimming program frequencies and diets on the characteristics of the anterior tibial muscle of 24

  18. Por mil devaluados pesos

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    Annie Rodríguez Collázos

    2013-03-01

    Full Text Available El estudio de lo popular y lo urbano hasta ahora se ha centrado en el comportamiento y en algunas relaciones de los habitantes con su entorno. “Por mil devaluados pesos. Publicidad popular y urbana”, pretende explorar las formas de publicidad, dispersas en diferentes espacios populares y urbanos en Bogotá, identificando esquemas y formas características de sus propios códigos comunicativos; se centran en un objeto de estudio consistente en las estrategias publicitarias y los códigos comunicativos en los mensajes publicitarios populares en las subculturas de San Victorino, 7 de Agosto y Sanandresito de San José.

  19. Feldspathic Meteorites MIL 090034 and 090070: Late Additions to the Lunar Crust

    Science.gov (United States)

    Nyquist, L. E.; Shirai, N.; Yamaguchi, A.; Shih, C.-Y.; Park, J.; Ebihara, M.

    2016-01-01

    Our studies of the Miller Range lunar meteorites MIL 090034, 090036, and 090070 show them to be a diverse suite of rocks from the lunar highlands hereafter referred to as MIL 34, MIL 36, and MIL 70, resp. MIL34 and MIL70, the focus of this work, are crystalline melt breccias. Plagioclase compositions in both peak sharply around An96-97. Mg numbers of olivine vary from 58-65 with a few higher values. MIL36 is a regolith breccia. MIL 34 and MIL 70 have some of the highest Al2O3 abundances of lunar highland meteorites, indicating that they have among the largest modal abundances of plagioclase for lunar meteorites. They have lower Sc and Cr abundances than nearly all lunar highland meteorites except Dho 081, Dho 489 and Dho 733. MIL34 and MIL70 also have similar cosmic ray exposure (CRE) ages of approximately 1-2 Ma indicating they are launch paired. (MIL36 has a larger CRE age approximately greater than 70 Ma). Park et al. found a variation in Ar-Ar ages among subsamples of MIL 34 and MIL70, but preferred ages of 3500+/-110 Ma for the "Dark" phase of MIL 34 anorthite and 3520+/-30 Ma for the "Light" phase of MIL70. Bouvier et al. reported a Pb-Pb age of 3894+/-39 Ma for a feldspathic clast of MIL 34 and a similar age for a melt lithology. Here we reexamine the Rb-Sr and Sm-Nd isotopic data, which show complexities qualitatively consistent with those of the Ar-Ar and Pb-Pb data. The Sm-Nd data in particular suggest that the feldspathic compositions of MIL 34 and MIL 70 formed during initial lunar geochemical differentiation, and REE modeling suggests a relatively late-stage formation.

  20. Noble metals can have different effects on photocatalysis over metal-organic frameworks (MOFs): a case study on M/NH₂-MIL-125(Ti) (M=Pt and Au).

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    Sun, Dengrong; Liu, Wenjun; Fu, Yanghe; Fang, Zhenxing; Sun, Fangxiang; Fu, Xianzhi; Zhang, Yongfan; Li, Zhaohui

    2014-04-14

    M-doped NH2-MIL-125(Ti) (M=Pt and Au) were prepared by using the wetness impregnation method followed by a treatment with H2 flow. The resultant samples were characterized by powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), X-ray absorption fine structure (XAFS) analyses, N2-sorption BET surface area, and UV/Vis diffuse reflectance spectroscopy (DRS). The photocatalytic reaction carried out in saturated CO2 with triethanolamine (TEOA) as sacrificial agent under visible-light irradiations showed that the noble metal-doping on NH2-MIL-125(Ti) promoted the photocatalytic hydrogen evolution. Unlike that over pure NH2-MIL-125(Ti), in which only formate was produced, both hydrogen and formate were formed over Pt- and Au-loaded NH2-MIL-125(Ti). However, Pt and Au have different effects on the photocatalytic performance for formate production. Compared with pure NH2-MIL-125(Ti), Pt/NH2-MIL-125(Ti) showed an enhanced activity for photocatalytic formate formation, whereas Au has a negative effect on this reaction. To elucidate the origin of the different photocatalytic performance, electron spin resonance (ESR) analyses and density functional theory (DFT) calculations were carried out over M/NH2-MIL-125(Ti).The photocatalytic mechanisms over M/NH2-MIL-125(Ti) (M=Pt and Au) were proposed. For the first time, the hydrogen spillover from the noble metal Pt to the framework of NH2-MIL-125(Ti) and its promoting effect on the photocatalytic CO2 reduction is revealed. The elucidation of the mechanism on the photocatalysis over M/NH2-MIL-125(Ti) can provide some guidance in the development of new photocatalysts based on MOF materials. This study also demonstrates the potential of using noble metal-doped MOFs in photocatalytic reactions involving hydrogen as a reactant, like hydrogenation reactions. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  1. Metal-organic framework MIL-101(Cr) as a sorbent of porous membrane-protected micro-solid-phase extraction for the analysis of six phthalate esters from drinking water: a combination of experimental and computational study.

    Science.gov (United States)

    Wang, Ting; Wang, Jian; Zhang, Conglu; Yang, Zhao; Dai, Xinpeng; Cheng, Maosheng; Hou, Xiaohong

    2015-08-07

    An attractive metal-organic framework (MOF) MIL-101(Cr) material was synthesized at the nanoscale and applied as a sorbent in the porous membrane-protected micro-solid-phase extraction (μ-SPE) device for the pre-concentration of phthalate esters (PAEs) in drinking water samples for the first time. Parameters influencing the extraction efficiency, such as the selection of sorbent materials, pH adjustment, the effect of salt, magnetic-stirring extraction time, the desorption solvent and the desorption time, were investigated. Under the optimum conditions, the limits of detection from gas chromatography-mass spectrometric analysis for PAEs varied from 0.004 to 0.02 μg L(-1). The linear ranges were from 0.1 to 50 μg L(-1) or from 0.2 to 50 μg L(-1) for the analytes with the relative standard deviations fluctuating from 0.8 to 10.9% (n = 5). The enrichment factors (EFs) for the target PAEs were varied from 143 to 187. MIL-101(Cr) exhibited remarkable advantages compared to activated carbon and MIL-100(Fe). On the other hand, the computational method was first used to predict the adsorption of MIL-101(Cr) towards PAEs. The molecular interactions and the free binding energies between MIL-101(Cr) and PAEs were observed and calculated in terms of the molecular modeling method. MIL-101(Cr) showed high potential in the analysis of PAEs at trace levels in drinking water. The computational result was consistent with the detected enrichment factors. The computational modeling accurately predicted the extraction efficiency of MOF-based material towards the target analytes. Therefore, the combination of experimental and computational study provided a new strategy on the trace contaminant analysis.

  2. Navy.mil - Photo Galleries

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    Personnel Command (NPC) Navy SAPR Navy EEO Inclusion And Diversity Navy Standard Integrated Personnel System (OPSEC) Navy Trademarks Military One Source USA.gov U.S. Office of Special Counsel Social Media Directory Links Navy Reserve Navy.mil Underway Navy Personnel Command (NPC) Navy SAPR Navy EEO Inclusion And

  3. Low-temperature binding of NO adsorbed on MIL-100(Al)-A case study for the application of high resolution pulsed EPR methods and DFT calculations.

    Science.gov (United States)

    Mendt, Matthias; Barth, Benjamin; Hartmann, Martin; Pöppl, Andreas

    2017-12-14

    The low-temperature binding of nitric oxide (NO) in the metal-organic framework MIL-100(Al) has been investigated by pulsed electron nuclear double resonance and hyperfine sublevel correlation spectroscopy. Three NO adsorption species have been identified. Among them, one species has been verified experimentally to bind directly to an 27 Al atom and all its relevant 14 N and 27 Al hyperfine interaction parameters have been determined spectroscopically. Those parameters fit well to the calculated ones of a theoretical cluster model, which was derived by density functional theory (DFT) in the present work and describes the low temperature binding of NO to the regular coordinatively unsaturated Al 3+ site of the MIL-100(Al) structure. As a result, the Lewis acidity of that site has been characterized using the NO molecule as an electron paramagnetic resonance active probe. The DFT derived wave function analysis revealed a bent end-on coordination of the NO molecule adsorbed at that site which is almost purely ionic and has a weak binding energy. The calculated flat potential energy surface of this species indicates the ability of the NO molecule to freely rotate at intermediate temperatures while it is still binding to the Al 3+ site. For the other two NO adsorption species, no structural models could be derived, but one of them is indicated to be adsorbed at the organic part of the metal-organic framework. Hyperfine interactions with protons, weakly coupled to the observed NO adsorption species, have also been measured by pulsed electron paramagnetic resonance and found to be consistent with their attribution to protons of the MIL-100(Al) benzenetricarboxylate ligand molecules.

  4. Low-temperature binding of NO adsorbed on MIL-100(Al)—A case study for the application of high resolution pulsed EPR methods and DFT calculations

    Science.gov (United States)

    Mendt, Matthias; Barth, Benjamin; Hartmann, Martin; Pöppl, Andreas

    2017-12-01

    The low-temperature binding of nitric oxide (NO) in the metal-organic framework MIL-100(Al) has been investigated by pulsed electron nuclear double resonance and hyperfine sublevel correlation spectroscopy. Three NO adsorption species have been identified. Among them, one species has been verified experimentally to bind directly to an 27Al atom and all its relevant 14N and 27Al hyperfine interaction parameters have been determined spectroscopically. Those parameters fit well to the calculated ones of a theoretical cluster model, which was derived by density functional theory (DFT) in the present work and describes the low temperature binding of NO to the regular coordinatively unsaturated Al3+ site of the MIL-100(Al) structure. As a result, the Lewis acidity of that site has been characterized using the NO molecule as an electron paramagnetic resonance active probe. The DFT derived wave function analysis revealed a bent end-on coordination of the NO molecule adsorbed at that site which is almost purely ionic and has a weak binding energy. The calculated flat potential energy surface of this species indicates the ability of the NO molecule to freely rotate at intermediate temperatures while it is still binding to the Al3+ site. For the other two NO adsorption species, no structural models could be derived, but one of them is indicated to be adsorbed at the organic part of the metal-organic framework. Hyperfine interactions with protons, weakly coupled to the observed NO adsorption species, have also been measured by pulsed electron paramagnetic resonance and found to be consistent with their attribution to protons of the MIL-100(Al) benzenetricarboxylate ligand molecules.

  5. Iron metal-organic frameworks MIL-88B and NH2-MIL-88B for the loading and delivery of the gasotransmitter carbon monoxide.

    Science.gov (United States)

    Ma, Mingyan; Noei, Heshmat; Mienert, Bernd; Niesel, Johanna; Bill, Eckhard; Muhler, Martin; Fischer, Roland A; Wang, Yuemin; Schatzschneider, Ulrich; Metzler-Nolte, Nils

    2013-05-17

    Crystals of MIL-88B-Fe and NH2-MIL-88B-Fe were prepared by a new rapid microwave-assisted solvothermal method. High-purity, spindle-shaped crystals of MIL-88B-Fe with a length of about 2 μm and a diameter of 1 μm and needle-shaped crystals of NH2-MIL-88B-Fe with a length of about 1.5 μm and a diameter of 300 nm were produced with uniform size and excellent crystallinity. The possibility to reduce the as-prepared frameworks and the chemical capture of carbon monoxide in these materials was studied by in situ ultrahigh vacuum Fourier-transform infrared (UHV-FTIR) spectroscopy and Mössbauer spectroscopy. CO binding occurs to unsaturated coordination sites (CUS). The release of CO from the as-prepared materials was studied by a myoglobin assay in physiological buffer. The release of CO from crystals of MIL-88B-Fe with t(1/2) = 38 min and from crystals of NH2-MIL-88B-Fe with t(1/2) = 76 min were found to be controlled by the degradation of the MIL materials under physiological conditions. These MIL-88B-Fe and NH2-MIL-88B-Fe materials show good biocompatibility and have the potential to be used in pharmacological and therapeutic applications as carriers and delivery vehicles for the gasotransmitter carbon monoxide. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  6. As milícias nacionais

    Directory of Open Access Journals (Sweden)

    Jeanne Berrance de Castro

    1968-03-01

    Full Text Available As milícias nacionais — herança ideológica do século XVIII —tiveram na milícia norte-americana e nas Guardas Nacionais francesa e também brasileira expressivos exemplos dessas fôrças paramilitares. O conceito da "nação em armas", institucionalizado, possibilitou ao poder civil o contrôle militar, auxilado de outro lado pela descen-tralização dessas milícias nacionais que, com isso, suplantaram as fôrças militares regulares.

  7. Probing Interactions of N-Donor Molecules with Open Metal Sites within Paramagnetic Cr-MIL-101: A Solid-State NMR Spectroscopic and Density Functional Theory Study.

    Science.gov (United States)

    Wittmann, Thomas; Mondal, Arobendo; Tschense, Carsten B L; Wittmann, Johannes J; Klimm, Ottokar; Siegel, Renée; Corzilius, Björn; Weber, Birgit; Kaupp, Martin; Senker, Juergen

    2018-02-14

    Understanding host-guest interactions is one of the key requirements for adjusting properties in metal-organic frameworks (MOFs). In particular, systems with coordinatively unsaturated Lewis acidic metal sites feature highly selective adsorption processes. This is attributed to strong interactions with Lewis basic guest molecules. Here we show that a combination of 13 C MAS NMR spectroscopy with state-of-the-art density functional theory (DFT) calculations allows one to unravel the interactions of water, 2-aminopyridine, 3-aminopyridine, and diethylamine with the open metal sites in Cr-MIL-101. The 13 C MAS NMR spectra, obtained with ultrafast magic-angle spinning, are well resolved, with resonances distributed over 1000 ppm. They present a clear signature for each guest at the open metal sites. Based on competition experiments this leads to the following binding preference: water open metal sites, the NMR data offer additional information about the guest and framework dynamics. We expect that our strategy has the potential for probing the binding situation of adsorbate mixtures at the open metal sites of MOFs in general and thus accesses the microscopic interaction mechanisms for this important material class, which is essential for deriving structure-property relationships.

  8. Novel composite material polyoxovanadate@MIL-101(Cr): a highly efficient electrocatalyst for ascorbic acid oxidation.

    Science.gov (United States)

    Fernandes, Diana M; Barbosa, André D S; Pires, João; Balula, Salete S; Cunha-Silva, Luís; Freire, Cristina

    2013-12-26

    A novel hybrid composite material, PMo10V2@MIL-101 was prepared by the encapsulation of the tetra-butylammonium (TBA) salt of the vanadium-substituted phosphomolybdate [PMo10V2O40](5-) (PMo10V2) into the porous metal-organic framework (MOF) MIL-101(Cr). The materials characterization by powder X-ray diffraction, Fourier transform infrared spectra and scanning electron microscopy confirmed the preparation of the composite material without disruption of the MOF porous structure. Pyrolytic graphite electrodes modified with the original components (MIL-101(Cr), PMo10V2), and the composite material PMo10V2@MIL-101 were prepared and their electrochemical responses were studied by cyclic voltammetry. Surface confined redox processes were observed for all the immobilized materials. MIL-101(Cr) showed one-electron reduction process due to chromium centers (Cr(III) → Cr(II)), while PMo10V2 presented five reduction processes: the peak at more positive potentials is attributed to two superimposed 1-electron vanadium reduction processes (V(V) → V(IV)) and the other four peaks to Mo-centred two-electron reduction processes (Mo(VI) → Mo(V)). The electrochemical behavior of the composite material PMo10V2@MIL-101 showed both MIL-101(Cr) and PMo10V2 redox features, although with the splitting of the two vanadium processes and the shift of the Mo- and Cr- centered processes to more negative potentials. Finally, PMo10V2@MIL-101 modified electrode showed outstanding enhanced vanadium-based electrocatalytic properties towards ascorbic acid oxidation, in comparison with the free PMo10V2, as a result of its immobilization into the porous structure of the MOF. Furthermore, PMo10V2@MIL-101 modified electrode showed successful simultaneous detection of ascorbic acid and dopamine.

  9. Synthesis of a hybrid MIL-101(Cr)/ZTC composite for hydrogen storage applications

    CSIR Research Space (South Africa)

    Musyoka, Nicholas M

    2016-06-01

    Full Text Available Metal–organic frameworks (MOFs) hybrid composites have recently attracted considerable attention in hydrogen storage applications. In this study a hybrid composite of zeolite templated carbon (ZTC) and Cr-based MOF (MIL-101) was synthesised...

  10. A combination of computational-experimental study on metal-organic frameworks MIL-53(Al) as sorbent for simultaneous determination of estrogens and glucocorticoids in water and urine samples by dispersive micro-solid-phase extraction coupled to UPLC-MS/MS.

    Science.gov (United States)

    Gao, Guihua; Li, Sijia; Li, Shuo; Wang, Yudan; Zhao, Pan; Zhang, Xiangyu; Hou, Xiaohong

    2018-04-01

    In this work, computational and experimental methods were used to study the adsorption of estrogens and glucocorticoids on metal-organic frameworks (MOFs). Computer-aided molecular simulation was applied to predict the adsorption of eight analytes on four MOFs (MIL-101(Cr), MIL-100(Fe), MIL-53(Al), and UiO-66(Zr)) by examining molecular interactions and calculating free binding energies. Subsequently, the four water-stable MOFs were synthesized and evaluated as adsorbents for the target hormones in aqueous solution. As the MOF exhibiting the highest adsorption capacity in both computations and experiments, MIL-53(Al) was chosen as a sorbent to develop a dispersive micro-solid-phase extraction procedure coupled to ultra-performance liquid chromatography tandem mass spectrometry for simultaneous determination of the target analytes in water and human urine samples. Experimental parameters affecting the extraction recoveries, including pH, ionic strength, MIL-53(Al) amount, extraction time, desorption time, and desorption solvent, were optimized. The optimized method provided a linear range of 0.005025-368.6μg/L with good correlation coefficients (0.9982 ≤ r 2 ≤ 0.9992), and limits of detection (S/N = 3) and quantification (S/N = 10) of 0.0015-1.0μg/L and 0.005-1.8μg/L, respectively. The analyte recoveries were in the range of 80.6-98.4% in water samples and 88.4-93.2% in urine samples. Furthermore, MIL-53(Al) showed good stability over 10 extraction cycles (RSD extraction efficiencies for MOFs and targets, providing new directions for the development and utilization of MOFs. Copyright © 2017 Elsevier B.V. All rights reserved.

  11. Highly efficient capture of iodine by Cu/MIL-101

    Science.gov (United States)

    Qi, Bingbing; Liu, Ying; Zheng, Tao; Gao, Qianhong; Yan, Xuewu; Jiao, Yan; Yang, Yi

    2018-02-01

    In order to improve the uptake capacity of MIL-101 for iodine, Cu nanoparticles doped MIL-101 were successfully synthesized through a facile method. The obtained Cu/MIL-101 was characterized by SEM, XRD, EDS, TEM, IR, TGA and BET to examine the chemical and thermal stabilities. The capture experiments for the adsorbents showed that the capture capacity of Cu/MIL-101 for volatile iodine is 342 wt%, which is higher than that of pure MIL-101. An I2 uptake of 342 wt% is the highest value reported among metal-organic frameworks. Furthermore, Cu/MIL-101 has a cycle ratio of 95% after three cycles and exhibits a better cyclicity than pure MIL-101. Meanwhile, Cu/MIL-101 shows an excellent reversible adsorption of iodine in solution.

  12. Metal organic framework MIL-101(Cr) for dehydration reactions

    Indian Academy of Sciences (India)

    Porous chromium terephthalate MIL-101 (Cr-MIL-101) has been prepared by direct method under hydrothermal conditions and characterized using X-ray diffraction, N2 sorption, TGA and FT-IR. The nitrogen adsorption-desorption isotherm shows that the Cr-MIL-101 possesses BET specific surface area of 2563 m2/g.

  13. MIL-53(Fe), MIL-101, and SBA-15 porous materials: potential platforms for drug delivery.

    Science.gov (United States)

    Gordon, Jeff; Kazemian, Hossein; Rohani, Sohrab

    2015-02-01

    Conventional drug administration suffers from several drawbacks, including a lack of specificity for diseased tissue, the necessity of large and frequent doses, and adverse side effects. Great effort is currently being devoted to developing nanoparticle-based therapeutics capable of prolonging drug administration and providing better control. Here we demonstrate the use of flexible microporous MIL-53(Fe) and mesoporous MIL-101 and SBA-15 as matrices for the adsorption and in vitro drug delivery of acetaminophen, progesterone, and stavudine. A drug loading of 20 wt.% was achieved for each of the nanomaterials using an incipient wetness impregnation procedure. BET, DSC, and XRPD analyses indicated that the entire loaded amount of each of the model drugs had successfully been incorporated within the mesoporous channels of both MIL-101 and SBA-15. DSC analysis evidenced that a portion of each of the model drugs had deposited onto the outer surface of MIL-53(Fe) particles; however, the portion of each drug that had incorporated within the microporous channels was slowly delivered in a diffusion-controlled process, which occurred over a period of up to six days for acetaminophen. These results demonstrate the unique ability of MIL-53(Fe) to adapt its porosity and optimize drug-matrix interactions. Owing to its larger pore diameters and weaker host-guest interactions, MIL-101 release times were shorter, yet still prolonged, as evidenced by the complete release of stavudine after five days. Complete release of each of the drugs from SBA-15 occurred very quickly as a result of rapid drug dissolution and diffusion out of the mesopores. Copyright © 2014 Elsevier B.V. All rights reserved.

  14. Late Bombardment of the Lunar Highlands Recorded in MIL 090034, MIL 090036 and MIL 090070 Lunar Meteorites

    Science.gov (United States)

    Park, J.; Nyquist, L. E.; Shih, C.-Y.; Herzog, G. F.; Yamaguchi, A.; Shirai, N.; Ebihara, M.; Lindsay, F. N.; Delaney, J.; Turrin, B.; hide

    2013-01-01

    The Kaguya mission detected small but widespread outcrops of nearly pure ferroan anorthosite in and around large impact basins on the Moon. Along with certain lunar rocks, highly feldspathic lunar meteorites such as MIL 090034 (M34), 090036 (M36), and 090070 (M70) may provide samples of this material. We have measured the Ar-40/Ar-39 release patterns and cosmogenic Ar-38 concentrations of several small (<200 microg) samples separated from M34,36, and 70. From petrographic observations concluded that "some of the clasts and grains experienced generations of modifications," a conclusion that we examine in light of our data.

  15. Fracture toughness of Ceramic-Fiber-Reinforced Metallic-Intermetallic-Laminate (CFR-MIL) composites

    International Nuclear Information System (INIS)

    Vecchio, Kenneth S.; Jiang, Fengchun

    2016-01-01

    Novel Ceramic-Fiber-Reinforced-Metal-Intermetallic-Laminate (CFR-MIL) composites, Ti–Al 3 Ti–Al 2 O 3 –Al, were synthesized by reactive foil sintering in air. Microstructure controlled material architectures were achieved with continuous Al 2 O 3 fibers oriented in 0° and 90° layers to form fully dense composites in which the volume fractions of all four component phases can be tailored. Bend fracture specimens were cut from the laminate plates in divider orientation, and bend tests were performed to study the fracture behavior of CFR-MIL composites under three-point and four-point bending loading conditions. The microstructures and fractured surfaces of the CFR-MIL composites were examined using optical microscopy and scanning electron microscopy to establish a correlation between the fracture toughness, fracture surface morphology and microstructures of CFR-MIL composites. The fracture and toughening mechanisms of the CFR-MIL composites are also addressed. The present experimental results indicate that the fracture toughness of CFR-MIL composites determined by three- and four-point bend loading configurations are quite similar, and increased significantly compared to MIL composites without ceramic fiber reinforcement. The interface cracking behavior is related to the volume fraction of the brittle Al 3 Ti phase and residual ductile Al, but the fracture toughness values appear to be insensitive to the ratio of these two phases. The toughness appears to be dominated by the ductility/strength of the Ti layers and the strength and crack bridging effect of the ceramic fibers.

  16. Effective Adsorption and Removal of Phosphate from Aqueous Solutions and Eutrophic Water by Fe-based MOFs of MIL-101.

    Science.gov (United States)

    Xie, Qiying; Li, Yan; Lv, Zhaoling; Zhou, Hang; Yang, Xiangjun; Chen, Jing; Guo, Hong

    2017-06-12

    Although many efforts have been devoted to the adsorptive removal of phosphate from aqueous solutions and eutrophic water, it is still highly desirable to develop novel adsorbents with high adsorption capacities. In this study, Fe-based metal-organic frameworks (MOFs), MIL-101 and NH 2 -MIL-101, are fabricated through a general facile strategy. Their performance as an adsorbent for phosphate removal is investigated. Experiments are performed to study the effects of various factors on the phosphate adsorption, including adsorbent dosage, contact time and co-existing ions. Both MIL-101(Fe) and NH 2 -MIL-101(Fe) show highly effective removal of phosphates from aqueous solutions, and the concentration of phosphates decrease sharply from the initial 0.60 mg·L -1 to 0.045 and 0.032 mg·L -1 , respectively, within just 30 min of exposure. The adsorption kinetics and adsorption isotherms reveal that NH 2 -MIL-101(Fe) has higher adsorption capacity than MIL-101(Fe) possibly due to the amine group. Furthermore, the Fe-based MOFs also exhibit a high selectivity towards phosphate over other anions such as chloride, bromide, nitrate and sulfate. Particularly, the prepared Fe-based MIL-101 materials are also capable of adsorbing phosphate in an actual eutrophic water sample and display better removal effect.

  17. Preparation of magnetic MIL-101 (Cr) for efficient removal of ciprofloxacin.

    Science.gov (United States)

    Bayazit, Şahika Sena; Danalıoğlu, Selen Tuğba; Abdel Salam, Mohamed; Kerkez Kuyumcu, Özge

    2017-11-01

    Metal organic frameworks are widely used as adsorbent materials in recent years. In this study, the most prepared metal organic framework MIL-101 was prepared by hydrothermal method and featured magnetic property using co-precipitation method Fe 3 O 4 . Then, the prepared composite (MIL-101/Fe 3 O 4 ) was first characterized using XRD, FTIR, SEM-EDS, and surface area analysis, then was used for the adsorptive removal of the most used antibiotic, ciprofloxacin (CIP). The effect of different adsorption variables which may affect the removal of CIP by MIL-101/Fe 3 O 4 was investigated, as well as their adsorbent quantity, initial CIP concentration, pH, temperature, and contact time. The non-linear Langmuir and Freundlich isotherm were applied to experimental data. It was observed that rising solution temperature decreases adsorption efficiency, as the maximum adsorption uptake value was 63.28 mg g -1 at 298 K and 22.93 mg g -1 at 313 K, indicating the exothermic nature of the adsorption. The adsorption was studied kinetically and found to follow the pseudo-second-order kinetic model. The desorption of CIP from the MIL-101/Fe 3 O 4 was investigated using three different eluents, and the results showed that phosphate-buffered solution was the most effective desorption eluent. Graphical abstract Schematic diagram of the preparation steps of MIL-101/Fe3O4.

  18. Nanometric MIL-125-NH2 Metal–Organic Framework as a Potential Nerve Agent Antidote Carrier

    Directory of Open Access Journals (Sweden)

    Sérgio M. F. Vilela

    2017-10-01

    Full Text Available The three-dimensional (3D microporous titanium aminoterephthalate MIL-125-NH2 (MIL: Material of Institut Lavoisier was successfully isolated as monodispersed nanoparticles, which are compatible with intravenous administration, by using a simple, safe and low-cost synthetic approach (100 °C/32 h under atmospheric pressure so that for the first time it could be considered for encapsulation and the release of drugs. The nerve agent antidote 2-[(hydroxyiminomethyl]-1-methyl-pyridinium chloride (2-PAM or pralidoxime was effectively encapsulated into the pores of MIL-125-NH2 as a result of the interactions between 2-PAM and the pore walls being mediated by π-stacking and hydrogen bonds, as deduced from infrared spectroscopy and Monte Carlo simulation studies. Finally, colloidal solutions of MIL-125-NH2 nanoparticles exhibited remarkable stability in different organic media, aqueous solutions at different pH and under relevant physiological conditions over time (24 h. 2-PAM was rapidly released from the pores of MIL-125-NH2 in vitro.

  19. Nanometric MIL-125-NH₂ Metal-Organic Framework as a Potential Nerve Agent Antidote Carrier.

    Science.gov (United States)

    Vilela, Sérgio M F; Salcedo-Abraira, Pablo; Colinet, Isabelle; Salles, Fabrice; de Koning, Martijn C; Joosen, Marloes J A; Serre, Christian; Horcajada, Patricia

    2017-10-12

    The three-dimensional (3D) microporous titanium aminoterephthalate MIL-125-NH₂ (MIL: Material of Institut Lavoisier) was successfully isolated as monodispersed nanoparticles, which are compatible with intravenous administration, by using a simple, safe and low-cost synthetic approach (100 °C/32 h under atmospheric pressure) so that for the first time it could be considered for encapsulation and the release of drugs. The nerve agent antidote 2-[(hydroxyimino)methyl]-1-methyl-pyridinium chloride (2-PAM or pralidoxime) was effectively encapsulated into the pores of MIL-125-NH₂ as a result of the interactions between 2-PAM and the pore walls being mediated by π-stacking and hydrogen bonds, as deduced from infrared spectroscopy and Monte Carlo simulation studies. Finally, colloidal solutions of MIL-125-NH₂ nanoparticles exhibited remarkable stability in different organic media, aqueous solutions at different pH and under relevant physiological conditions over time (24 h). 2-PAM was rapidly released from the pores of MIL-125-NH₂ in vitro.

  20. Geochemistry of Lunar Highland Meteorites Mil, 090034, 090036 AND 090070

    Science.gov (United States)

    Shirai, N.aoki; Ebihara, M.; Sekimoto, S.; Yamaguchi, A.; Nyquist, L.; Shih, C.-Y.; Park, J.; Nagao, K.

    2012-01-01

    Apollo and Luna samples were collected from a restricted area on the near side of the Moon, while the source craters of the lunar meteorites are randomly distributed. For example, Takeda et al. [1] and Yamaguchi et al. [2] found a variety of lithic clasts in Dho 489 and Y 86032 which were not represented by Apollo samples, and some of these clasts have lower rare earth elements (REE) and FeO abundances than Apollo anorthosites, respectively. Takeda et al. [1] and Yamaguchi et al. [2] concluded that Dho 489 and Y 86032 originated from the lunar farside. Therefore, lunar meteorites provide an opportunity to study lunar surface rocks from areas not sampled by Apollo and Luna missions. Three lunar anorthitic breccias (MIL 090034, 090036 and 090070) were found on the Miller Range Ice Field in Antarctica during the 2009-2010 ANSMET season [3]. In this study, we determined elemental abudnances for MIL 090034, 090036 and 090070 by using INAA and aimed to characterize these meteorites in chemical compositions in comparison with those for other lunar meteorites and Apollo samples.

  1. Demonstration of coupling correction below the per-mil limit in the LHC

    CERN Document Server

    Maclean, Ewen Hamish; Fartoukh, Stephane; Persson, Tobias Hakan Bjorn; Skowronski, Piotr Krzysztof; Tomas Garcia, Rogelio; Wierichs, David Alexander; CERN. Geneva. ATS Department

    2016-01-01

    Linear coupling between betatron motion in the transverse planes is one of the key optics parameters for any accelerator. It can substantially affect the nonlinear dynamics, influencing both lifetime and the damping of instabilities, as well as affecting the ability to measure and control the linear optics. A review of published material revealed no account of coupling having been corrected significantly below the per-mil level in any hadron accelerator. This note reports the achievement of a sub-per-mil coupling correction during an LHC Machine Development study.

  2. The removal of bisphenol A from aqueous solutions by MIL-53(Al) and mesostructured MIL-53(Al).

    Science.gov (United States)

    Zhou, Meimei; Wu, Yi-Nan; Qiao, Junlian; Zhang, Jing; McDonald, Amanda; Li, Guangtao; Li, Fengting

    2013-09-01

    In this work, metal-organic framework MIL-53(Al){Al(OH)[O2C-C6H4-CO2]} and MIL-53(Al)-F127{Al(OH)[O2C-C6H4-CO2]} were synthesized and used as sorbents to remove bisphenol A (BPA) from aqueous system. The sorption kinetics data of BPA were found to be in agreement with the pseudo-second-order model. The equilibrium sorption amounts of BPA on MIL-53(Al) and MIL-53(Al)-F127 reached 329.2±16.5 and 472.7±23.6 mg g(-1), respectively, far more than that of commercial activated carbons (ranging from 129.6 to 263.1 mg g(-1)). Both MIL-53(Al) and MIL-53(Al)-F127 could remove BPA fast from aqueous solutions, and the required contact time to reach equilibrium was approximately 90 min for MIL-53(Al) and 30 min for MIL-53(Al)-F127, respectively. The optimum pH levels for the removal of BPA using MIL-53 (Al) and MIL-53(Al)-F127 were 4 and 6 separately. The optimum temperature for the sorption behavior of BPA on the two sorbents was 20 °C. The results performed show that the resulting products, as one kind of MOFs, can be regarded as a new class of sorbents for water treatment and could find great applications in the fields of environmental water pollution control and resources reuse. Copyright © 2013 Elsevier Inc. All rights reserved.

  3. Ni foam-immobilized MIL-101(Cr) nanocrystals toward system integration for hydrogen storage

    CSIR Research Space (South Africa)

    Ren, Jianwei

    2015-10-01

    Full Text Available Metal–organic framework (MOF) materials are only obtained as loose powders with low packing density and thermal conductivity. To enable the developed MOF powdered materials to be utilized in a hydrogen storage system, in this study, MIL-101...

  4. B-1 Aircraft Main Hydraulic Pump Tests With MIL-H-87257 Hydraulic Fluid

    National Research Council Canada - National Science Library

    Sharma, Shashi

    1998-01-01

    In an effort to convert the B-1 aircraft from MIL-H-5606 to M1-H-87257, the Air Force sponsored a study conducted by Rockwell International from April 1991 through June 1992, under contract F34601-89-C-0401...

  5. Chromium-based metal-organic framework MIL-101 as a highly effective catalyst in plasma for toluene removal

    Science.gov (United States)

    Wu, Junliang; Xia, Qibin; Xiao, Jing; Li, Zhong

    2017-11-01

    Catalytic performance of MIL-101—a type of chromium-based metal-organic frameworks (MOFs)—in a plasma catalysis system for toluene removal was experimentally studied. The MIL-101 was synthesized using a hydrothermal method, and its catalytic performance was compared to two other catalysts, Cr2O3/γ-Al2O3 and γ-Al2O3, in a dielectric barrier discharge (DBD) reactor. Results showed that the presence of a catalyst in plasma changed the voltage and current characteristic substantially, and promoted the performance of the plasma reactor. Among the catalysts, the MIL-101 exhibited a significantly high toluene conversion, which was 20% and 35% higher than Cr2O3/γ-Al2O3 and γ-Al2O3, respectively, under the same testing conditions, as well as higher carbon balance and CO2 selectivity. The analysis of by-products on the surfaces of the catalysts before and after reaction demonstrated that MIL-101 had better resistance towards by-products accumulation compared to Cr2O3/γ-Al2O3 and γ-Al2O3. The loading of MnO x on MIL-101 further promoted its catalytic performance. MIL-101 exhibits attractive catalytic properties as a catalyst in a plasma catalysis system for the decomposition of volatile organic compounds.

  6. Chromium-based metal-organic framework MIL-101 as a highly effective catalyst in plasma for toluene removal

    International Nuclear Information System (INIS)

    Wu, Junliang; Xia, Qibin; Xiao, Jing; Li, Zhong

    2017-01-01

    Catalytic performance of MIL-101—a type of chromium-based metal-organic frameworks (MOFs)—in a plasma catalysis system for toluene removal was experimentally studied. The MIL-101 was synthesized using a hydrothermal method, and its catalytic performance was compared to two other catalysts, Cr 2 O 3 / γ -Al 2 O 3 and γ -Al 2 O 3 , in a dielectric barrier discharge (DBD) reactor. Results showed that the presence of a catalyst in plasma changed the voltage and current characteristic substantially, and promoted the performance of the plasma reactor. Among the catalysts, the MIL-101 exhibited a significantly high toluene conversion, which was 20% and 35% higher than Cr 2 O 3 / γ -Al 2 O 3 and γ -Al 2 O 3 , respectively, under the same testing conditions, as well as higher carbon balance and CO 2 selectivity. The analysis of by-products on the surfaces of the catalysts before and after reaction demonstrated that MIL-101 had better resistance towards by-products accumulation compared to Cr 2 O 3 / γ -Al 2 O 3 and γ -Al 2 O 3 . The loading of MnO x on MIL-101 further promoted its catalytic performance. MIL-101 exhibits attractive catalytic properties as a catalyst in a plasma catalysis system for the decomposition of volatile organic compounds. (paper)

  7. Catalytic Performance of Microwave Functionalized NH2-MIL-53 for Cyclic Carbonate Synthesis from CO2 and Epoxides.

    Science.gov (United States)

    Seok, Han-Geul; Kim, Dong-Woo; Yang, Jeung-Gyu; Kim, Moon-Il; Park, Dae-Won

    2016-05-01

    The efficacy of microwave irradiation in the quaternization of amino-functionalized MIL-53 metal-organic framework (MOF) as well as the catalytic activity of the resultant MOF in the cycloaddition of carbon dioxide with epoxides under solvent-free conditions has been studied. A series of NH2-MIL-53 were synthesized and quaternized by reacting alkyl halide of various alkyl chains and anions under microwave irradiation. The post-functionalized F-MIL-53-AXs were characterized through solid-state XRD, FT-IR, XPS, and TGA. F-MIL-53-Mel prepared by microwave method showed higher AGC yield than that by the conventional heating method. F-MIL-53-AXs with iodide anion exhibited the best catalytic activity irrespective of the alkyl chain length, in agreement with the generally accepting order of nucleophilicity, ClMIL-53-AX catalysts were found to exhibit high thermal stability and were reusable over than three times, without any significant lowering of activity.

  8. Una imatge val per mil paraules

    Directory of Open Access Journals (Sweden)

    Jaume Cabré

    1999-11-01

    Full Text Available Una vegada hi havia un videoclub ple de pel·lícules i a l'entrada hi havia un rètol lluminós molt bonic que deia el lema d'aquesta casa, que és una imatge val per mil paraules. I vet aquí un dia que la clientela ja se n'havia anat, però encara no havien tancat els llums, van entrar al videoclub dues rates, l'Amàlia i l'Amèlia. I van dir: "Què fem avui?" Aleshores l'Amèlia se'n va anar de seguida cap al racó de la sèrie B i va agafar una pel·lícula poc coneguda, mentre que l'Amàlia va agafar Mort a Venècia. Llavors la va començar a rosegar i l'Amèlia li va dir: "Què, què te'n sembla?", i l'Amàlia li va contestar: "Mmm... Em va agradar més la novel·la."

  9. Effect of synthesis solvent on the breathing behavior of MIL-53(Al).

    Science.gov (United States)

    Mounfield, William P; Walton, Krista S

    2015-06-01

    This work reports the effect of using dimethylformamide (DMF) as the solvent for synthesizing MIL-53(Al). This well-known breathing MOF is typically prepared using hydrothermal methods. The two materials synthesized in DMF at 120°C and 220°C show significant deviations from the breathing behavior exhibited by the material synthesized hydrothermally. Powder X-ray diffraction confirmed that MIL-53(Al) synthesized in DMF at 120°C remains in the large-pore form under all conditions, while the other material synthesized at 220°C undergoes a more gradual breathing transition than is observed for MIL-53(Al) prepared by traditional methods. Solid-state NMR was employed to elucidate additional structural information and gain insight into the role synthesis solvent plays on breathing behavior. The CO2 and water adsorption of these large-pore stabilized materials were studied, and the differences in adsorption behavior compared to MIL-53(Al) prepared by traditional methods was discussed. Copyright © 2015 Elsevier Inc. All rights reserved.

  10. MEMS and mil/aero: technology push and market pull

    Science.gov (United States)

    Clifford, Thomas H.

    2001-04-01

    MEMS offers attractive solutions to high-density fluidics, inertial, optical, switching and other demanding military/aerospace (mil/aero) challenges. However, full acceptance must confront the realities of production-scale producibility, verifiability, testability, survivability, as well as long-term reliability. Data on these `..ilities' are crucial, and are central in funding and deployment decisions. Similarly, mil/aero users must highlight specific missions, environmental exposures, and procurement issues, as well as the quirks of its designers. These issues are particularly challenging in MEMS, because of the laws of physics and business economics, as well as the risks of deploying leading-edge technology into no-fail applications. This paper highlights mil/aero requirements, and suggests reliability/qualification protocols, to guide development effort and to reassure mil/aero users that MEMS labs are mindful of the necessary realities.

  11. NATO Pallet with Javelin Missiles, MIL-STD-1660 Tests

    National Research Council Canada - National Science Library

    2004-01-01

    The U.S. Army Defense Ammunition Center (DAC), Validation Engineering Division (SJMAC-DEV) conducted tests in accordance with MIL-STD-1660, "Design Criteria for Ammunition Unit Loads" on the NATO pallet with Javelin missiles...

  12. Hydrogen selective NH{sub 2}-MIL-53(Al) MOF membranes with high permeability

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Feng; Zou, Xiaoqin; Gao, Xue; Fan, Songjie; Sun, Fuxing; Ren, Hao; Zhu, Guangshan [State Key Laboratory of Inorganic, Synthesis and Preparative Chemistry, Jilin University, Changchun (China)

    2012-09-11

    Hydrogen-based energy is a promising renewable and clean resource. Thus, hydrogen selective microporous membranes with high performance and high stability are demanded. Novel NH{sub 2}-MIL-53(Al) membranes are evaluated for hydrogen separation for this goal. Continuous NH{sub 2}-MIL-53(Al) membranes have been prepared successfully on macroporous glass frit discs assisted with colloidal seeds. The gas sorption ability of NH{sub 2}-MIL-53(Al) materials is studied by gas adsorption measurement. The isosteric heats of adsorption in a sequence of CO{sub 2}> N{sub 2}> CH{sub 4}{approx} H{sub 2} indicates different interactions between NH{sub 2}-MIL-53(Al) framework and these gases. As-prepared membranes are measured by single and binary gas permeation at different temperatures. The results of singe gas permeation show a decreasing permeance in an order of H{sub 2}> CH{sub 4}> N{sub 2}> CO{sub 2}, suggesting that the diffusion and adsorption properties make significant contributions in the gas permeation through the membrane. In binary gas permeation, the NH{sub 2}-MIL-53(Al) membrane shows high selectivity for H{sub 2} with separation factors of 20.7, 23.9 and 30.9 at room temperature (288 K) for H{sub 2} over CH{sub 4}, N{sub 2} and CO{sub 2}, respectively. In comparison to single gas permeation, a slightly higher separation factor is obtained due to the competitive adsorption effect between the gases in the porous MOF membrane. Additionally, the NH{sub 2}-MIL-53(Al) membrane exhibits very high permeance for H{sub 2} in the mixtures separation (above 1.5 x 10{sup -6} mol m{sup -2} s{sup -1} Pa{sup -1}) due to its large cavity, resulting in a very high separation power. The details of the temperature effect on the permeances of H{sub 2} over other gases are investigated from 288 to 353 K. The supported NH{sub 2}-MIL-53(Al) membranes with high hydrogen separation power possess high stability, resistance to cracking, temperature cycling and show high reproducibility

  13. Enhancing the water stability of Al-MIL-101-NH2 via postsynthetic modification.

    Science.gov (United States)

    Wittmann, Thomas; Siegel, Renée; Reimer, Nele; Milius, Wolfgang; Stock, Norbert; Senker, Jürgen

    2015-01-02

    The resistance of metal-organic frameworks towards water is a very critical issue concerning their practical use. Recently, it was shown for microporous MOFs that the water stability could be increased by introducing hydrophobic pendant groups. Here, we demonstrate a remarkable stabilisation of the mesoporous MOF Al-MIL-101-NH2 by postsynthetic modification with phenyl isocyanate. In this process 86 % of the amino groups were converted into phenylurea units. As a consequence, the long-term stability of Al-MIL-101-URPh in liquid water could be extended beyond a week. In water saturated atmospheres Al-MIL-101-URPh decomposed at least 12-times slower than the unfunctionalised analogue. To study the underlying processes both materials were characterised by Ar, N2 and H2 O sorption measurements, powder X-ray diffraction, thermogravimetric and chemical analysis as well as solid-state NMR and IR spectroscopy. Postsynthetic modification decreased the BET equivalent surface area from 3363 to 1555 m(2)  g(-1) for Al-MIL-101-URPh and reduced the mean diameters of the mesopores by 0.6 nm without degrading the structure significantly and reducing thermal stability. In spite of similar water uptake capacities, the relative humidity-dependent uptake of Al-MIL-101-URPh is slowed and occurs at higher relative humidity values. In combination with (1) H-(27) Al D-HMQC NMR spectroscopy experiments this favours a shielding mechanism of the Al clusters by the pendant phenyl groups and rules out pore blocking. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  14. Curation and Allocation of the New Antarctic Nakhlite, MIL03346

    Science.gov (United States)

    McBride, K. M.; Righter, K.; Satterwhite, C. E.; Schwarz, C.; Robinson, P.

    2005-01-01

    In January 2004, the ANSMET reconnaissance field team (Fig. 1) working in the Miller Range of the Transantarctic Mountains discovered a 715 g achondrite that was instantly recognized as unique. Named MIL03346, initial processing (NASA Johnson Space Center or JSC) and classification (Smithsonian Institution or SI) revealed this achondrite to be a nakhlite (Fig. 2). MIL03346 is the seventh nakhlite recognized in world collections [2], the third nakhlite returned from Antartica, and the first nakhlite in the US Antarctic collection (Table 1). The following is a summary of the steps taken in the processing and allocating of MIL 03346 and some comparisons to some other lunar and martian meteorites processed and allocated at JSC.

  15. The flexibility of modified-linker MIL-53 materials.

    Science.gov (United States)

    Munn, Alexis S; Pillai, Renjith S; Biswas, Shyam; Stock, Norbert; Maurin, Guillaume; Walton, Richard I

    2016-03-14

    The flexibility of eight aluminium hydroxo terephthalates [Al(OH)(BDC-X)]·n(guest) (BDC = 1,4-benzene-dicarboxylate; X = -H, -CH3, -Cl, -Br, -NH2, -NO2, -(OH)2, -CO2H) crystallising in the MIL-53-type structure was investigated upon thermal dehydration of as-made samples, superhydration and methanol adsorption/desorption using in situ powder X-ray diffraction (PXRD). Profile fitting was used to determine lattice parameters as a function of time and/or temperature to describe their structural evolution. It has thus been shown that while methanol vapour adsorption induces an opening of all the modified frameworks, except the -NH2 material, superhydration only leads to open structures for Al-MIL-53-NO2, -Br and -(OH)2. All the MIL-53 solids, except Al-MIL-53-(OH)2 are present in the open structures upon thermal dehydration. In addition to the exploration of the breathing behavior of this MIL-53 series, the issue of disorder in the distribution of the functional groups between the organic linkers was explored. As a typical illustration, density functional theory calculations were carried out on different structures of Al-MIL-53-Cl, in which the distribution of -Cl within two adjacent BDC linkers is varied. The results show that the most energetically stable configuration leads to the best agreement with the experimental PXRD pattern. This observation supports that the distribution of the selected linker substituent in the functionalised solid is governed by energetics and that there is a preference for an ordering of this arrangement.

  16. Augmentation du rendement des producteurs de petits mils par leur ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    29 avr. 2016 ... Image. Cultivateurs du petit mils en Inde. Une plus grande diversité de variétés de petit mil contribue à réduire la vulnérabilité à l'égard des mauvaises conditions météorologiques. En dépit du fait qu'ils ont une teneur élevée en micronutriments et en fibres alimentaires, présentent un indice glycémique ...

  17. Mineralogy and Petrography of MIL 090001, a Highly Altered CV Chondrite from the Reduced Sub-Group

    Science.gov (United States)

    Keller, Lindsay P.

    2011-01-01

    MIL 090001 is a large (greater than 6 kg) CV chondrite from the reduced subgroup (CV(sub red)) that was recovered during the 2009-2010 ANSMET field season [1]. The CV(sub red) subgroup meteorites retain primitive characteristics and have escaped the Na and Fe meta-somatism that affected the oxidized (CV(sub ox)) subgroups. MIL 090001 is, however, reported to be altered [1], and thus a major objective of this study is to characterize its mineralogy and petrography and the extent of the alteration.

  18. Metal organic framework MIL-101(Cr) for dehydration reactions

    Indian Academy of Sciences (India)

    under vapour phase conditions in the temperature range of 513–533 K and time on stream (TOS) at 513 K. Cr-MIL-101 ... gies and potential applications in gas storage, sep- aration ... these materials have not been explored much. Recently .... The products were collected in ice cold trap and ... There is no change in the crys-.

  19. Compact, Low-Overhead, MIL-STD-1553B Controller

    Science.gov (United States)

    Katz, Richard; Barto, Rod

    2009-01-01

    A compact and flexible controller has been developed to provide MIL-STD- 1553B Remote Terminal (RT) communications and supporting and related functions with minimal demand on the resources of the system in which the controller is to be installed. (MIL-STD-1553B is a military standard that encompasses a method of communication and electrical-interface requirements for digital electronic subsystems connected to a data bus. MIL-STD-1553B is commonly used in defense and space applications.) Many other MIL-STD-1553B RT controllers are complicated, and to enable them to function, it is necessary to provide software and to use such ancillary separate hardware devices as microprocessors and dual-port memories. The present controller functions without need for software and any ancillary hardware. In addition, it contains a flexible system interface and extensive support hardware while including on-chip error-checking and diagnostic support circuitry. This controller is implemented within part of a modern field-programmable gate array.

  20. Brønsted instead of Lewis acidity in functionalized MIL-101Cr MOFs for efficient heterogeneous (nano-MOF) catalysis in the condensation reaction of aldehydes with alcohols.

    Science.gov (United States)

    Herbst, Annika; Khutia, Anupam; Janiak, Christoph

    2014-07-21

    Porous chromium(III) 2-nitro-, 2-amino-, and nonfunctionalized terephthalate (MIL-101Cr) metal organic frameworks are heterogeneous catalysts for diacetal formation from benzaldehyde and methanol (B-M reaction) as well as other aldehydes and alcohols. MIL-101Cr-NO2 obtained by direct reaction between CrO3 and 2-nitro-terephthalate showed the highest activity with 99% conversion in the B-M reaction in 90 min and turnover numbers of 114. The activity decreased in the order MIL-101Cr-NO2 > MIL-101Cr > MIL-101Cr-NH2. Within different samples of nonfunctionalized MIL-101Cr the activity increased with surface area. Methanol gas sorption of the different MIL materials correlates with the BET surface area and pore volume but not with the diacetalization activity. Benzaldehyde adsorption from heptane showed no significant difference for the different MILs. Gas sorption studies of CD3CN to probe for a higher Lewis acidity in MIL-101Cr-NO2 remained inconclusive. A high B-M catalytic activity of wet MIL-101Cr-NO2 excluded significant contributions from coordinatively unsaturated Lewis-acid sites. pH measurements of methanol dispersions of the MIL materials gave the most acidic pH (as low as 1.9) for MIL-101Cr-NO2, which significantly increased over MIL-101Cr (3.0) to MIL-101Cr-NH2 (3.3). The increase in acidity is of short range or a surface effect to the heterogeneous MIL particles as protons dissociating from the polarized aqua ligands (Cr-OH2) have to stay near the insoluble counteranionic framework. The variation in Brønsted acidity of MIL-101Cr-NO2 > MIL-101Cr ≈ MIL-101Cr-NH2 correlates with the withdrawing effect of NO2 and the diacetalization activity. The catalytic B-M activity of soluble, substitution-inert, and acidic Cr(NO3)3·9H2O supports the Brønsted-acid effect of the MIL materials. Filtration and centrifugation experiments with MIL-101Cr-NO2 revealed that about 2/3 of the catalytic activity comes from nano-MOF particles with a diameter below 200 nm. The MIL

  1. Deposition of CdS nanoparticles on MIL-53(Fe) metal-organic framework with enhanced photocatalytic degradation of RhB under visible light irradiation

    Energy Technology Data Exchange (ETDEWEB)

    Hu, Longxing, E-mail: hulxhhhb@shu.edu.cn [School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444 (China); Deng, Guihua [School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444 (China); Lu, Wencong [College of Sciences, Shanghai University, Shanghai 200444 (China); Pang, Siwei; Hu, Xing [School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444 (China)

    2017-07-15

    . Moreover, the reusability of 1.5-CdS/MIL composite was also studied.

  2. Deposition of CdS nanoparticles on MIL-53(Fe) metal-organic framework with enhanced photocatalytic degradation of RhB under visible light irradiation

    International Nuclear Information System (INIS)

    Hu, Longxing; Deng, Guihua; Lu, Wencong; Pang, Siwei; Hu, Xing

    2017-01-01

    reusability of 1.5-CdS/MIL composite was also studied.

  3. Enhanced catalytic activity over MIL-100(Fe) loaded ceria catalysts for the selective catalytic reduction of NO{sub x} with NH{sub 3} at low temperature

    Energy Technology Data Exchange (ETDEWEB)

    Wang, Peng [School of Environmental Science and Technology, Dalian University of Technology, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), Dalian 116024 (China); Sun, Hong [School of Environmental & Chemical Engineering, Dalian Jiaotong University, Dalian 116028 (China); Quan, Xie, E-mail: quanxie@dlut.edu.cn [School of Environmental Science and Technology, Dalian University of Technology, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), Dalian 116024 (China); Chen, Shuo [School of Environmental Science and Technology, Dalian University of Technology, Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), Dalian 116024 (China)

    2016-01-15

    Highlights: • Nano-ceria was successfully encapsulated into MIL-100(Fe) for the SCR of NO{sub x}. • The incorporated ceria in MIL-100(Fe) showed high content of chemisorbed oxygen. • The added ceria into MIL-100(Fe) improved the formation of adsorbed NO{sub 2} species. • The addition of ceria into MIL-100(Fe) enhanced SCR activity at low temperature. - Abstract: The development of catalysts for selective catalytic reduction (SCR) reactions that are highly active at low temperatures and show good resistance to SO{sub 2} and H{sub 2}O is still a challenge. In this study, we have designed and developed a high-performance SCR catalyst based on nano-sized ceria encapsulated inside the pores of MIL-100(Fe) that combines excellent catalytic power with a metal organic framework architecture synthesized by the impregnation method (IM). Transmission electron microscopy (TEM) revealed the encapsulation of ceria in the cavities of MIL-100(Fe). The prepared IM-CeO{sub 2}/MIL-100(Fe) catalyst shows improved catalytic activity both at low temperatures and throughout a wide temperature window. The temperature window for 90% NO{sub x} conversion ranges from 196 to 300 °C. X-ray photoelectron spectroscopy (XPS) and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFT) analysis indicated that the nano-sized ceria encapsulated inside MIL-100(Fe) promotes the production of chemisorbed oxygen on the catalyst surface, which greatly enhances the formation of the NO{sub 2} species responsible for fast SCR reactions.

  4. Multiple Nebular Gas Reservoirs Recorded by Oxygen Isotope Variation in a Spinel-Rich CAI in CO3 MIL 090019

    Science.gov (United States)

    Simon, J. I.; Simon, S. B.; Nguyen, A. N.; Ross, D. K.; Messenger, S.

    2017-07-01

    We conducted NanoSIMS ion imaging studies of a primitive spinel-rich CAI from the MIL 090019 CO3 chondrite. It records radial O-isotopic heterogeneity among multiple occurrences of the same mineral, reflecting distinct nebular O-isotopic reservoirs.

  5. Magnetic solid phase extraction of typical polycyclic aromatic hydrocarbons from environmental water samples with metal organic framework MIL-101 (Cr) modified zero valent iron nano-particles.

    Science.gov (United States)

    Zhou, Qingxiang; Lei, Man; Wu, Yalin; Yuan, Yongyong

    2017-03-03

    Metal-organic framework material has been paid more attention because of its good physical and chemical properties. Nanoscale zero valent iron is also in the center of concern recently. Combination of their merits will give impressive results. Present study firstly synthesized a new magnetic nanomaterial nano-scale zero valent iron-functionalized metal-organic framworks MIL-101 (Fe@MIL-101) by co-precipitation method. The morphology and structure of the as-prepared Fe@MIL-101 were characterized by transmission electron microscopy and X-ray diffraction, etc. The experimental results showed that Fe@MIL-101 earned good adsorption ability to polycyclic aromatic hydrocarbons. The limits of detection of developed magnetic solid phase extraction were all below 0.064μgL -1 and precision can be expressed as relative standard deviation (RSD, %) and which was better than 4.4% (n=6). The real water analysis indicated that the spiked recoveries were satisfied, and Fe@MIL-101 earned excellent reusability. All these demonstrated that Fe@MIL-101 exhibited excellent adsorption capability to polycyclic aromatic hydrocarbons and would be a good adsorbent for development of new monitoring methods for environmental pollutants. Copyright © 2017 Elsevier B.V. All rights reserved.

  6. Mil rosas roubadas, Work of Silviano Santiago a Bakhitinian Analysis

    Directory of Open Access Journals (Sweden)

    Renata Coelho Marchezan

    2017-10-01

    Full Text Available This article analyzes Mil rosas roubadas, written by Silviano Santiago in 2014, dealing with the notions of (autobiography, (autobiographical novel, metafiction and autofiction. Although the creation of this last word may indicate the existence of a new genre – it is even adopted by the writer himself to name his work –, the article shows the pertinence of placing Mil rosas roubadas in the route of the transformations and stylisations of the (autobiographical novel, such as examined by M. Bakhtin. The novel is, for Bakhtin, a genre without rigid forms, an unfinished genre, as it always follows the inflections of social life. In this way the ressemantization of the self, proposed by Silviano Santiago, is analyzed.

  7. Metal organic framework MIL-101 for radioiodine capture and storage

    Science.gov (United States)

    Assaad, Thaer; Assfour, Bassem

    2017-09-01

    we report on the use of metal organic frameworks(MOFs) for radioiodine recovery and storage. One MOF (namely MIL-101) was prepared and investigated in detail to demonstrate the iodine removal efficiency and capacity of MOFs. The typical sorption kinetics and uptake isotherms were measured using radioactive iodine (123 I) for the first time. Our measurements indicate that MOFs can capture and store radioiodine in very high efficiency and fast kinetics.

  8. MIL-HDBK-338: Environmental Conversion Table Correction

    Science.gov (United States)

    Hark, Frank; Novack, Steven

    2017-01-01

    In reliability analysis, especially for launch vehicles, limited data is frequently a problem. Component data from other environments must be used. MIL-HBK-338 has a matrix showing the conversation between environments. Due to round off the conversions are not commutative, converting from A to B will not equal converting from B to A. Agenda: Introduction to environment conversions; Original table; Original table with edits; How big is the problem?; First attempt at correction; Proposed solution.

  9. Media and Information Literacy (MIL) in journalistic learning: strategies for accurately engaging with information and reporting news

    Science.gov (United States)

    Inayatillah, F.

    2018-01-01

    In the era of digital technology, there is abundant information from various sources. This ease of access needs to be accompanied by the ability to engage with the information wisely. Thus, information and media literacy is required. From the results of preliminary observations, it was found that the students of Universitas Negeri Surabaya, whose major is Indonesian Literature, and they take journalistic course lack of the skill of media and information literacy (MIL). Therefore, they need to be equipped with MIL. The method used is descriptive qualitative, which includes data collection, data analysis, and presentation of data analysis. Observation and documentation techniques were used to obtain data of MIL’s impact on journalistic learning for students. This study aims at describing the important role of MIL for students of journalistic and its impact on journalistic learning for students of Indonesian literature batch 2014. The results of this research indicate that journalistic is a science that is essential for students because it affects how a person perceives news report. Through the reinforcement of the course, students can avoid a hoax. MIL-based journalistic learning makes students will be more skillful at absorbing, processing, and presenting information accurately. The subject influences students in engaging with information so that they can report news credibly.

  10. Fabrication Parameters of Asymmetric Mixed Matrix Matrimid-MIL-53/PMHS Membrane for CO2/CH4 Separation

    Directory of Open Access Journals (Sweden)

    Fatereh Dorosti

    2017-03-01

    Full Text Available Asymmetrically mixed matrix Matrimid-MIL-53 membranes with silicone cover layer were fabricated. For better understanding of membrane fabrication process, three main parameters of fabrication, Matrimid concentration, silicone concentration and weight percentage of metal organic framework (MIL-53 particles, were optimized by an experimental design method. Cross-section SEM images were used to study the membrane structure and polymer-particles interface. Moreover, thermal resistance of the membranes and the existence of various bonds in them were investigated by FTIR and TGA analyses. The results showed that membranes had porous structure with finger-like morphology. At low and moderate percentages of particles, there were no non-selective voids observed at polymer-particles interface. The thermal resistance of membranes increased with the increase of MIL-53 weight percentage and the destruction temperature of polymer increased from 410°C to 450°C. The permeability tests results showed that the Matrimid (20% wt-MIL-53(15% wt/PMHS (10%wt membrane exhibited the highest level of CO2/CH4 selectivity (23.6. However, in the membrane with 30 wt% particles loading, selectivity decreased due to particles agglomeration and void formation. The experimental design results showed that the concentration of silicone in covering solution had significant effect. CO2 and CH4 permeability decreased and ideal selectivity of CO2/CH4 increased with silicone concentration enhancement. Although the Matrimid concentration had a little effect on CO2/CH4 ideal selectivity, its enhancement increased the selectivity of the gases. The optimization results showed the membrane with 17.8% of Matrimd polymer, 13.2% of silicone polymer and 15.5 wt% of MIL-53 particle displayed the highest selectivity and CO2 permeability.

  11. Coordination polymer nanobamboos of {Fe(x)In(1-x)}-MIL-88B: induced formation of a virtual In-MIL-88B.

    Science.gov (United States)

    Park, Shin Ae; Lee, Hee Jung; Cho, Yea Jin; Choi, Sora; Oh, Moonhyun

    2014-05-05

    A precise fabrication of nanobamboo structures made from hybrid coordination polymers of the type {Fex In1-x }-MIL-88B is demonstrated. The compositions of the hybrid coordination polymer nanobamboos of {Fex In1-x }-MIL-88B (x=0.06, 0.19, or 0.75) are regulated by altering the amount of metal ions used in the reactions. Interestingly, the formation of a virtual In-MIL-88B (precise structure, {Fe0.06 In0.94 }-MIL-88B), which cannot be created in a typical reaction, is induced by the assistance of a Fe-MIL-88B structure. The a and c cell parameters of {Fe0.06 In0.94 }-MIL-88B are calculated at 10.95 and 19.86 Å, respectively. These values of {Fe0.06 In0.94 }-MIL-88B are larger than those of pure Fe-MIL-88B owing to the large ionic size of In(3+) within the framework. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  12. Multifunctional polyoxometalates encapsulated in MIL-100(Fe): highly efficient photocatalysts for selective transformation under visible light.

    Science.gov (United States)

    Liang, Ruowen; Chen, Rui; Jing, Fenfen; Qin, Na; Wu, Ling

    2015-11-07

    H3PMo12O40 molecules have been successfully encapsulated in the cavities of MIL-100(Fe) via a facile hydrothermal method (denoted as HPMo@MIL-100(Fe)). A series of characterization has corroborated the insertion of H3PMo12O40 within the cavities of MIL-100(Fe). The resulting HPMo@MIL-100(Fe) nanocomposites have exhibited much higher photoactivity than the original-MIL-100(Fe) toward the photocatalytic selective oxidation of benzylic alcohols and the reduction of Cr(vi) under visible light irradiation (λ≥ 420 nm). The higher photoactivity of HPMo@MIL-100(Fe) can be attributed to the integrative effect of enhanced light absorption intensity and more efficient separation of photogenerated electron-hole pairs. The host porous structure of MIL-100(Fe) can achieve a uniform composition with H3PMo12O40, which is significantly important for producing highly reactive dispersed H3PMo12O40 molecules and enhancing the photocatalytic activity of HPMo@MIL-100(Fe) nanocomposites. And the immobilized H3PMo12O40 molecules are more convenient for recycling. Importantly, almost no Fe and Mo ions leach from the MIL-100(Fe) during the reaction, which verifies the photostability of the HPMo@MIL-100(Fe). In addition, possible photocatalytic redox reaction mechanisms have been investigated.

  13. Deposition of CdS nanoparticles on MIL-53(Fe) metal-organic framework with enhanced photocatalytic degradation of RhB under visible light irradiation

    Science.gov (United States)

    Hu, Longxing; Deng, Guihua; Lu, Wencong; Pang, Siwei; Hu, Xing

    2017-07-01

    A novel composite, CdS/MIL-53(Fe), was successfully fabricated via a facile solvothermal method and characterized with XRD, SEM, TEM, XPS, FT-IR and UV-vis DRS. The results showed that the fabrication was able to result in a good dispersion of CdS nanoparticles onto MIL-53(Fe). The photocatalytic activities of the as-synthesized composite were investigated through the degradation of Rhodamine B (RhB) in water under visible light irradiation. It was found that the composite prepared at the mass ratio of CdS to MIL-53(Fe) of 1.5:1 displayed the highest photocatalytic activity. An approximately 92.5% of photocatalytic degradation of RhB was achieved at 0.5 g/L of 1.5-CdS/MIL dosage, 10 mg/L of initial RhB concentration and 23 °C of reaction temperature under visible light irradiation. The RhB photocatalytic degradation followed well the first-order kinetics equation and the increased catalyst dosage and optimal initial RhB concentration were responsible for the enhanced photocatalytic degradation. Quenching tests revealed that the predominant free radicals in the CdS/MIL-(53)-RhBaq-visible light system was O2-rad ; nevertheless, h+ and rad OH also contributed to a certain degree. The enhanced photocatalytic performance was ascribed to the formation of heterojunction structure between CdS and MIL-53(Fe) which significantly suppressed the recombination of photogenerated electron-hole pairs. Moreover, the reusability of 1.5-CdS/MIL composite was also studied.

  14. Synthesis of highly efficient α-Fe{sub 2}O{sub 3} catalysts for CO oxidation derived from MIL-100(Fe)

    Energy Technology Data Exchange (ETDEWEB)

    Cui, Lifeng; Zhao, Di; Yang, Yang [Environment and Low-Carbon Research Center, School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093 (China); Wang, Yuxin [Institute of Applied Biotechnology, Taizhou Vocation & Technical College, Taizhou, Zhejiang 318000 (China); Zhang, Xiaodong, E-mail: fatzhxd@126.com [Environment and Low-Carbon Research Center, School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093 (China)

    2017-03-15

    Mesoporous hollow α-Fe{sub 2}O{sub 3} bricks were synthesized via a hydrothermal method to create a precursor MIL-100(Fe) and a subsequent calcination process was applied to prepare the Fe{sub 2}O{sub 3} phase. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) results showed the morphology of hollow α-Fe{sub 2}O{sub 3} bricks which inherited from the MIL-100(Fe) template. The catalytic activities of hollow α-Fe{sub 2}O{sub 3} bricks for CO oxidation are studied in this work. Due to better low temperature reduction behavior, mesoporous hollow α-Fe{sub 2}O{sub 3} bricks obtained at calcination temperature of 430 °C displayed high catalytic activity and excellent stability with a complete CO conversion temperature (T{sub 100}) of 255 °C. - Graphical abstract: Synthesis of highly efficient α-Fe{sub 2}O{sub 3} catalysts for CO oxidation derived from MIL-100(Fe). - Highlights: • α-Fe{sub 2}O{sub 3} is prepared by the thermolysis of a MIL-100(Fe) template. • The morphology of hollow α-Fe{sub 2}O{sub 3} bricks is inherited from MIL-100(Fe) template. • α-Fe{sub 2}O{sub 3} obtained at calcined temperature of 430 °C displays high activity • Enhanced activity is attributed to crystal plane and reduction behavior.

  15. Eu(III)-functionalized MIL-124 as fluorescent probe for highly selectively sensing ions and organic small molecules especially for Fe(III) and Fe(II).

    Science.gov (United States)

    Xu, Xiao-Yu; Yan, Bing

    2015-01-14

    A layerlike MOF (MIL-124, orGa2(OH)4(C9O6H4)) has been prepared and chosen as a parent compound to encapsulate Eu(3+) cations by one uncoordinated carbonyl group in its pores. The Eu(3+)-incorporated sample (Eu(3+)@MIL-124) is fully characterized, which shows excellent luminescence and good fluorescence stability in water or other organic solvents. Subsequently, we choose Eu(3+)@MIL-124 as sensitive probe for sensing metal ions, anions, and organic small molecules because of its robust framework. Studying of the luminescence properties reveals that the complex Eu(3+)@MIL-124 was developed as a highly selective and sensitive probe for detection of Fe(3+) (detection limit, 0.28 μM) and Fe(2+) ions through fluorescence quenching of Eu(3+) and MOF over other metal ions. In connection to this, a probable sensing mechanism was also discussed in this paper. In addition, when Eu(3+)@MIL-124 was immersed in the different anions solutions and organic solvents, it also shows highly selective for Cr2O7(2-)(detection limit, 0.15 μM)and acetone. Remarkably, it is the first Eu-doped MOF to exhibit an excellent ability for the detection of Fe(3+) and Fe(2+) in an aqueous environment without any structural disintegration of the framework.

  16. An amino-functionalized magnetic framework composite of type Fe3O4-NH2@MIL-101(Cr) for extraction of pyrethroids coupled with GC-ECD.

    Science.gov (United States)

    He, Xi; Yang, Wei; Li, Sijia; Liu, Yu; Hu, Baichun; Wang, Ting; Hou, Xiaohong

    2018-01-24

    An amino-functionalized magnetic framework composite of type Fe 3 O 4 -NH 2 @MIL-101(Cr) was synthesized using a solvothermal method. The material was characterized by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, nitrogen adsorption, and magnetometry. The composite combines the advantages of amino-modified Fe 3 O 4 and MIL-101(Cr). The presence of amino groups facilitates the fairly specific adsorption of pyrethroids. The composite was employed as a sorbent for magnetic solid phase extraction of five pyrethroids from environmental water samples. Following desorption with acidified acetone, the pyrethroids were quantified by gas chromatography with electron capture detection. The detection limits for bifenthrin, fenpropathrin, λ-cyhalothrin, permethrin, and deltamethrin range from 5 to 9 pg·mL -1 . The method is rapid, accurate, and highly sensitive. The molecular interactions and free binding energies between MIL-101(Cr) and the five pyrethroids were calculated by means of molecular docking. Graphical abstract A novel functionalized magnetic framework composite of type Fe 3 O 4 -NH 2 @MIL-101(Cr) was synthesized. It was applied as a sorbent for magnetic solid phase extraction of pyrethroids prior to their quantitation by gas chromatography with electron capture detection. The molecular interactions of analytes and MIL-101(Cr) were studied.

  17. Barrio residencial de Gratosoglio, Milán

    Directory of Open Access Journals (Sweden)

    Giannini, Sandro

    1967-04-01

    Full Text Available The group of 23 buildings in the residential zone of Gratosoglio, which provide space for 1,000 dwellings, has been built by the firm «Fintech Italcamus». This Italian firms applies in Italy the «Raymond Camus» system, which is a positive aid to heavy prefabrication in housing projects. The above group of buildings constitute part of the General Building Scheme so successfully initiated by the Autonomous Building Institute of the Province of Milan, with the purpose of helping to overcome the extensive lack of housing in the Milan region.El grupo de edificios levantado en el Barrio Residencial de Gratosoglio, Milán (23, con un total de 1.000 viviendas, ha sido construido por la firma «Fintech Italcamus», Sociedad italiana que aplica en Italia el sistema «Raymond Camus» y constituye una aportación positiva de la prefabricación pesada a la edificación residencial. Este conjunto forma parte del Plan General de edificación, emprendido con tanto éxito como acierto por el Instituto Autónomo de la Vivienda de la Provincia de Milán, para solucionar los problemas que la gigantesca presión demográfica planteaba en dicha provincia.

  18. MIL-100 derived nitrogen-embodied carbon shells embedded with iron nanoparticles

    Science.gov (United States)

    Mao, Chengyu; Kong, Aiguo; Wang, Yuan; Bu, Xianhui; Feng, Pingyun

    2015-06-01

    The use of metal-organic frameworks (MOFs) as templates and precursors to synthesize new carbon materials with controllable morphology and pre-selected heteroatom doping holds promise for applications as efficient non-precious metal catalysts. Here, we report a facile pyrolysis pathway to convert MIL-100 into nitrogen-doped carbon shells encapsulating Fe nanoparticles in a comparative study involving multiple selected nitrogen sources. The hierarchical porous architecture, embedded Fe nanoparticles, and nitrogen decoration endow this composite with a superior oxygen reduction activity. Furthermore, the excellent durability and high methanol tolerance even outperform the commercial Pt-C catalyst.The use of metal-organic frameworks (MOFs) as templates and precursors to synthesize new carbon materials with controllable morphology and pre-selected heteroatom doping holds promise for applications as efficient non-precious metal catalysts. Here, we report a facile pyrolysis pathway to convert MIL-100 into nitrogen-doped carbon shells encapsulating Fe nanoparticles in a comparative study involving multiple selected nitrogen sources. The hierarchical porous architecture, embedded Fe nanoparticles, and nitrogen decoration endow this composite with a superior oxygen reduction activity. Furthermore, the excellent durability and high methanol tolerance even outperform the commercial Pt-C catalyst. Electronic supplementary information (ESI) available: Material synthesis and elemental analysis, electrochemistry measurements, and additional figures. See DOI: 10.1039/c5nr02346g

  19. Characterization of adsorbed water in MIL-53(Al) by FTIR spectroscopy and ab-initio calculations.

    Science.gov (United States)

    Salazar, J M; Weber, G; Simon, J M; Bezverkhyy, I; Bellat, J P

    2015-03-28

    Here, we report ab-initio calculations developed with a twofold purpose: understand how adsorbed water molecules alter the infrared spectrum of the metal-organic framework MIL-53(Al) and to investigate which are the associated physico-chemical processes. The analyzed structures are the two anhydrous narrow (np⊘) and large (lp⊘) pore forms and the hydrated narrow pore form (np-H2O) of the MIL-53(Al). For these structures, we determined their corresponding infrared spectra (FTIR) and we identified the vibrational modes associated to the dominant spectral lines. We show that wagging and scissoring modes of CO2 give flexibility to the structure for facilitating the lp⊘- np⊘ transition. In our studies, this transition is identified by eight vibrational modes including the δCH(18a) vibrational mode currently used to identify the mentioned transition. We report an exhaustive band identification of the infrared spectra associated to the analyzed structures. Moreover, the FTIR for the np-H2O structure allowed us to identify four types of water molecules linked to the host structure by one to three hydrogen bonds.

  20. Thermally driven refrigeration by methanol adsorption on coatings of HKUST-1 and MIL-101(Cr)

    International Nuclear Information System (INIS)

    Kummer, Harry; Baumgartner, Max; Hügenell, Philipp; Fröhlich, Dominik; Henninger, Stefan K.; Gläser, Roger

    2017-01-01

    Highlights: • A novel approach of shaping MOFs as coatings on Al-substrates used as HX materials. • The efficiency of HKUST-1 and MIL-101(Cr) for refrigeration via Methanol sorption. • The thermal stability of the MOF coatings under application relevant conditions. • Focus on early implementation by use of commercially and pre-industrially MOFs. • Modelling of sorption uptakes under application conditions for apparatus design. - Abstract: A new and versatile binder-based metal organic framework-(MOF-) coating enables efficient use in fast-cycle adsorption chillers for cooling and refrigeration applications. Two different adsorbents were presented, HKUST-1 and Mil-101(Cr), with promising methanol adsorption characteristics and high loading capacities up to 1.22 g g"−"1. Polysiloxane-based coatings containing 65 and 80 wt% of the MOF adsorbents were produced and the adsorption characteristics were studied before and after extensive thermal treatment over 1000 cycles between 20 °C and 130 °C under methanol atmosphere by thermogravimetric analysis and X-ray diffractometry. Using the Dubinin-Astakhov approach, possible methanol loading lifts in a refrigeration process under different application conditions were quantified.

  1. The MIL-88A-Derived Fe3O4-Carbon Hierarchical Nanocomposites for Electrochemical Sensing

    Science.gov (United States)

    Wang, Li; Zhang, Yayun; Li, Xia; Xie, Yingzhen; He, Juan; Yu, Jie; Song, Yonghai

    2015-01-01

    Metal or metal oxides/carbon nanocomposites with hierarchical superstructures have become one of the most promising functional materials in sensor, catalysis, energy conversion, etc. In this work, novel hierarchical Fe3O4/carbon superstructures have been fabricated based on metal-organic frameworks (MOFs)-derived method. Three kinds of Fe-MOFs (MIL-88A) with different morphologies were prepared beforehand as templates, and then pyrolyzed to fabricate the corresponding novel hierarchical Fe3O4/carbon superstructures. The systematic studies on the thermal decomposition process of the three kinds of MIL-88A and the effect of template morphology on the products were carried out in detail. Scanning electron microscopy, transmission electron microscopy, X-ray powder diffraction, X-ray photoelectron spectroscopy and thermal analysis were employed to investigate the hierarchical Fe3O4/carbon superstructures. Based on these resulted hierarchical Fe3O4/carbon superstructures, a novel and sensitive nonenzymatic N-acetyl cysteine sensor was developed. The porous and hierarchical superstructures and large surface area of the as-formed Fe3O4/carbon superstructures eventually contributed to the good electrocatalytic activity of the prepared sensor towards the oxidation of N-acetyl cysteine. The proposed preparation method of the hierarchical Fe3O4/carbon superstructures is simple, efficient, cheap and easy to mass production. It might open up a new way for hierarchical superstructures preparation. PMID:26387535

  2. Synergy of mIL-21 and mIL-15 in enhancing DNA vaccine efficacy against acute and chronic Toxoplasma gondii infection in mice.

    Science.gov (United States)

    Li, Zhong-Yuan; Chen, Jia; Petersen, Eskild; Zhou, Dong-Hui; Huang, Si-Yang; Song, Hui-Qun; Zhu, Xing-Quan

    2014-05-23

    The synergistic protective efficacy of murine interleukin 21 (mIL-21) and mIL-15 administrated with DNA vaccine against acute and chronic Toxoplasma gondii infection in mice was investigated using T. gondii MIC8 (TgMIC8) as a model. We cloned mIL-21 and mIL-15 from splenic tissues of Kunming mice, and constructed eukaryotic plasmid pVAX/mIL-15, pVAX/mIL-21, and pVAX/mIL-21/mIL-15, respectively. After immunizing with pVAX/TgMIC8 in the presence or absence of these cytokines, immune responses were analyzed using lymphoproliferative assay, cytokine and serum antibody measurements, flow cytometric surface markers on lymphocytes and protection against acute and chronic T. gondii infection. Mice receiving pVAX/TgMIC8 alone developed a strong humoral responses and Th1 type cellular immune responses, and showed an increase of CD4+ and CD8+ T cells compared with all the controls. Adding pVAX/mIL-21 to pVAX/TgMIC8 compared to pVAX/TgMIC8 resulted in only a slight increase in humoral and cellular immune responses, and this immune response was lower than that induced by the pVAX/mIL-15 combined with pVAX/TgMIC8. Co-administration of pVAX/mIL-21/mIL-15 combined with pVAX/TgMIC8 elicited the strongest humoral and cellular immune responses among all the groups, leading to significantly increased survival time against acute infection and the significant reduction of tissue cysts, compared to all the controls. Synergy of mIL-21 and mIL-15 can facilitate specific humoral as well as cellular immune responses elicited by DNA vaccine against acute and chronic T. gondii infection in mice. Copyright © 2014 Elsevier Ltd. All rights reserved.

  3. A Mixed Matrix Membrane of Poly (4-methyl-1-pentyne Filled with MIL 53 Particles and Its Application in Carbon Dioxide and Nitrogen Separation

    Directory of Open Access Journals (Sweden)

    Reza Abedini

    2016-05-01

    Full Text Available The performance of poly (4-metyl-1-pentyne as mixed matrix membrane (MMM mixed with MIL 53 particles was studied to separate mixtures of carbon dioxide and nitrogen. MIL 53 particles was added to the polymer matrix with 10, 20 and 30 weight percentages. The adsorption of CO2 and N2 gases by MIL 53 was evaluated and the adsorption data was analyzed by Langmuir equation. Structure and thermal/mechanical properties of prepared membranes were characterized by means of FTIR, SEM, TGA and elongation test. Moreover, the gas permeation properties of membranes were studied by measuring the permeation of pure CO2 and N2. Furthermore, for accurate understanding of the gas permeation properties of the membranes, diffusion and solution coefficient of gases in neat membrane and MMMs were calculated using modified time-lag method. The results from TGA analysis showed that the degradation temperature of MMMs was enhanced and increased to 348ºC for membrane containing 30 wt% of MIL 53. The SEM images also illustrated a relatively uniform dispersion of particles with proper polymer/filler interfaces in the polymer matrix. The gas permeation results revealed that the permeability of both gases (especially CO2 increased with increasing MIL 53 loading, in which the permeability of CO2 increased from 98.74 Barrer in neat membrane to 217.65 Barrer in MMM containing 30 wt% filler. Moreover, calculation of CO2/N2 selectivity depicted that the selectivity enhanced from 16.66 to 22.70. Finally, the performance of MMMs was compared with Robeson’s upper bound in CO2/N2 separation and results showed that the MMM having 30 wt% of MIL 53 took over the Robeson bound.

  4. Experimentally determined coordinates for three MILS hydrophones near Ascension Island

    International Nuclear Information System (INIS)

    Harben, P.E.; Hollfelder, J.R.; Rodgers, A.J.

    1999-01-01

    We conducted an airgun survey in the waters of Ascension Island in May 1999 to determine new locations and depths for three Missile Impact Location System (MILS) hydrophones (ASC23, ASC24, and ASC26) currently in use by the Prototype International Data Center (PIDC) and the National Data Center (NDC). The nominal and new locations are summarized. Although not rigorous, errors in the new locations and depths are conservatively estimated to be less than 100 m. The hydrophones are either on or near the ocean bottom in all three cases. The new depths are consistent with the following: Direct-phase airgun arrivals; Bathymetry determined along the track of the ship used for this airgun survey; Reflected phases from the airgun data; Depths given in the original hydrophone installation report. (author)

  5. MIL-HDBK-338-Environmental Conversion Table Correction

    Science.gov (United States)

    Hark, Frank; Novack, Steve

    2017-01-01

    In reliability analysis for space launch vehicles, limited data is frequently a challenge due to the pure number of launches. A common solution is to use surrogate historical data of similar components from other industries (military data). The operating environment of the common data may be different from that of the necessary target analysis. The military electronic design handbook (MIL-HDBK-338) has a table for converting Mean Time Between Failure (MTBF) data from one environment to another. However, the table has some discrepancies and rounding of complementary conversions; namely going from environment A to B does not given the same result as going from B to A. This presentation will show the discrepancies in the original conversation table, the greater than expected magnitude, the problem with the updated published table and a suggested corrected table to reference when doing MTBF data environment conversion.

  6. Nanometric MIL-125-NH2 metal–organic framework as a potential nerve agent antidote carrier

    NARCIS (Netherlands)

    Vilela, S.M.F.; Salcedo-Abraira, P; Colinet, I.; Salles, F.; Koning, M.C. de; Joosen, M.J.A.; Serre, C.; Horcajada, P.

    2017-01-01

    The three-dimensional (3D) microporous titanium aminoterephthalate MIL-125-NH_2 (MIL: Material of Institut Lavoisier) was successfully isolated as monodispersed nanoparticles, which are compatible with intravenous administration, by using a simple, safe and low-cost synthetic approach (100 °C/32 h

  7. MIL-68 (In) nano-rods for the removal of Congo red dye from aqueous solution.

    Science.gov (United States)

    Jin, Li-Na; Qian, Xin-Ye; Wang, Jian-Guo; Aslan, Hüsnü; Dong, Mingdong

    2015-09-01

    MIL-68 (In) nano-rods were prepared by a facile solvothermal synthesis using NaOAc as modulator agent at 100°C for 30 min. The BET test showed that the specific surface area and pore volume of MIL-68 (In) nanorods were 1252 m(2) g(-1) and 0.80 cm(3) g(-1), respectively. The as-prepared MIL-68 (In) nanorods showed excellent adsorption capacity and rapid adsorption rate for removal of Congo red (CR) dye from water. The maximum adsorption capacity of MIL-68 (In) nanorods toward CR reached 1204 mg g(-1), much higher than MIL-68 (In) microrods and most of the previously reported adsorbents. The adsorption process of CR by MIL-68 (In) nano-rods was investigated and found to be obeying the Langmuir adsorption model in addition to pseudo-second-order rate equation. Moreover, the MIL-68 (In) nanorods showed an acceptable reusability after regeneration with ethanol. All information gives an indication that the as-prepared MIL-68 (In) nanorods show their potential as the adsorbent for highly efficient removal of CR in wastewater. Copyright © 2015 Elsevier Inc. All rights reserved.

  8. Modulated synthesis of chromium-based metal-organic framework (MIL-101) with enhanced hydrogen uptake

    CSIR Research Space (South Africa)

    Ren, Jianwei

    2014-08-01

    Full Text Available Modulated synthesis of MIL-101(Cr) in high yield and with good reproducibility using formic acid as a modulator is reported. Higher molar ratio of formic acid/CrCl(sub3) was found to form better shape-defined MIL-101(Cr) crystals with higher surface...

  9. Fe-MIL-101 exhibits selective cytotoxicity and inhibition of angiogenesis in ovarian cancer cells via downregulation of MMP.

    Science.gov (United States)

    Wang, Jiaqiang; Chen, Daomei; Li, Bin; He, Jiao; Duan, Deliang; Shao, Dandan; Nie, Minfang

    2016-05-18

    Though metal-organic frameworks (MOFs) have inspired potential applications in biomedicine, cytotoxicity studies of MOFs have been relatively rare. Here we demonstrate for the first time that an easily available MOF, Fe-MIL-101, possesses intrinsic activity against human SKOV3 ovarian cancer cells and suppress the proliferation of SKOV3 cells (IC50 = 23.6 μg mL(-1)) and normal mouse embryonic fibroblasts (BABL-3T3, IC50 = 78.3 μg mL(-1)) cells. It was more effective against SKOV3 cells than typical anticancer drugs such as artesunate (ART, IC50 = 96.9 μg mL(-1)) and oxaliplatin (OXA, IC50 = 64.4 μg mL(-1)), but had less effect on normal BABL-3T3 cells compared with ART (IC50 = 36.6 μg mL(-1)) and OXA (IC50 = 13.8 μg mL(-1)). Fe-MIL-101 induced apoptosis of human umbilical vein endothelial cells (HUVECs) via G0/G1 cell cycle arrest and decreased the mitochondrial membrane potential in HUVECs and induced apoptosis. Furthermore, Fe-MIL-101 exhibited stronger antiangiogenic effects in HUVEC cells than antiangiogenic inhibitor (SU5416) via downregulation the expression of MMP-2/9. Our results reveal a new role of Fe-MIL-101 as a novel, non-toxic anti-angiogenic agent that restricted ovarian tumour growth. These findings could open a new avenue of using MOFs as potential therapeutics in angiogenesis-dependent diseases, including ovarian cancer.

  10. Hydrogen storage behaviors of Ni-doped graphene Oxide/MIL-101 hybrid composites.

    Science.gov (United States)

    Lee, Seul-Yi; Park, Soo-Jin

    2013-01-01

    In this work, Ni-doped graphene oxide/MIL-101 hybrid composites (Ni--GO/MIL) were prepared to investigate their hydrogen storage behaviors. Ni--GO/MIL was synthesized by adding Ni--GO in situ during the synthesis of MIL-101 using a hydrothermal process, which was conducted by conventional convection heating with Cr(III) ion as a metal center and telephthalic acid as organic ligands. The crystalline structures and morphologies were measured by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. The specific surface area and micropore volume were investigated by N2/77 K adsorption isotherms using the Brunauer-Emmett-Teller (BET) method and Dubinin-Radushkevic (D-R) equation, respectively. The hydrogen storage capacity was investigated by BEL-HP at 77 K and 1 bar. The obtained results show that Ni--GO/MIL presents new directions for achieving novel hybrid materials with higher hydrogen storage capacity.

  11. CO2/CH4 Separation by a Mixed Matrix Membrane of Polymethylpentyne/MIL-53 Particles

    Directory of Open Access Journals (Sweden)

    Reza Abedini

    2014-10-01

    Full Text Available The effect of Materials Institute Lavoisier-53 (MIL-53 particles on gas transport properties of polymethylpentyne (PMP was investigated. MIL-53 was added to the polymer matrix with different loadings of 10, 20 and 30 wt%. The properties of MIL-53 and prepared membranes were analyzed through FTIR, SEM and TGA methods. The adsorption of CO2 and CH4 was conducted and analyzed accurately through Langmuir equation to investigate the gas transport properties of membranes. The results from TGA showed that degradation temperature (Td increases significantly with increasing MIL-53 loading. SEM images demonstrated that MIL-53 particles dispersed well in polymer matrix with no considerable agglomeration and no non-selective void formation at polymer/filler interface. In addition, CO2 and CH4 permeability measurement along with calculation of CO2/CH4 selectivity were performed. The results showed that the permeability of gases (especially for CO2 increased significantly by increasing the MIL-53 loading. Additionally, CO2/CH4 selectivity showed an increasing trend with increasing the MIL-53 weight percent. Unlike CH4, the CO2 solubility coefficient increased with increasing the MIL-53 loading because of high free volume of membrane and selective adsorption of CO2 with MIL-53. Despite CO2 solubility enhancement its diffusivity coefficient remained more or less unchanged. The enhancement in CH4 permeability has been mainly attributed to its slight incremental diffusivity due to the membrane's increasingly higher free volume. Finally, a comparison between membranes performance and CO2/CH4 Robeson upper bound showed that, the performance of membranes improved due to the presence of MIL-53 which was very close to the Robeson bound.

  12. Adsorptive removal of dibenzothiophene from model fuels over one-pot synthesized PTA@MIL-101(Cr) hybrid material

    Energy Technology Data Exchange (ETDEWEB)

    Jia, Shao-Yi; Zhang, Yan-Fei [School of Chemical Engineering and Technology, Tianjin University, Tianjin (China); Liu, Yong [School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin (China); Qin, Feng-Xiang; Ren, Hai-Tao [School of Chemical Engineering and Technology, Tianjin University, Tianjin (China); Wu, Song-Hai, E-mail: songhaiwu@gmail.com [School of Chemical Engineering and Technology, Tianjin University, Tianjin (China)

    2013-11-15

    Highlights: • One-pot synthesized PTA@MIL-101(Cr) shows high capacity of benzothiophene. • PTA/MIL-101(Cr) obtained via post-modification performs poor in the adsorption. • PTA and MIL-101(Cr) exhibit synergetic effect on adsorption of benzothiophene. • In the presence of aromatics, PTA@MIL-101(Cr) and MIL-101(Cr) remain their capacity. • PTA-dispersed MOFs adsorb dibenzothiophene through acid–base interaction. -- Abstract: Hybrid nanomaterials comprising phosphotungstic acid (PTA) and MIL-101(Cr) were prepared through one-pot synthesis and post-modification methods and then were used as adsorbents of dibenzothiophene (DBT) from simulated diesel fuels. Samples obtained by different ways (encapsulation and impregnation) were characterized by nitrogen adsorption, transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier transform infrared spectrum (FT-IR) and series of adsorption experiments. The equilibrium adsorption capacities of PTA@MIL-101(Cr) illustrated that the direct introduction of PTA into MIL-101(Cr) during synthesis resulted in a 10.7% increase compared with MIL-101(Cr). However, porous hybrid adsorbent PTA/MIL-101(Cr) prepared via post-modification method exhibited lower adsorption capacity than virgin MIL-101(Cr). The theoretical maximum adsorption capacity (Q{sub 0}) of PTA@MIL-101(Cr) is 136.5 mg S/g adsorbent, 4.2 times of MIL-101(Cr). Even in competitive adsorption between aromatic compounds, which possess strong affinity with MOFs, and DBT, PTA@MIL-101(Cr) and MIL-101(Cr) remained their effectiveness in removal of DBT in the system. Based on these results, it can be presumed that MIL-101(Cr), modified properly, can be used as a promising adsorbent for eliminating aromatics and S-compounds in commercial fuels simultaneously.

  13. The Oxygen Isotopic Composition of MIL 090001: A CR2 Chondrite with Abundant Refractory Inclusions

    Science.gov (United States)

    Keller, Lindsay P.; McKeegan, K. D.; Sharp, Z. D.

    2012-01-01

    MIL 090001 is a large (>6 kg) carbonaceous chondrite that was classified as a member of the CV reduced subgroup (CVred) that was recovered during the 2009-2010 ANSMET field season [1]. Based on the abundance of refractory inclusions and the extent of aqueous alteration, Keller [2] suggested a CV2 classification. Here we report additional mineralogical and petrographic data for MIL 090001, its whole-rock oxygen isotopic composition and ion microprobe analyses of individual phases. The whole rock oxygen isotopic analyses show that MIL 090001 should be classified as a CR chondrite.

  14. Molecular simulations of a CO2/CO mixture in MIL-127

    Science.gov (United States)

    Chokbunpiam, Tatiya; Fritzsche, Siegfried; Parasuk, Vudhichai; Caro, Jürgen; Assabumrungrat, Suttichai

    2018-03-01

    Adsorption and diffusion of an equimolar feed mixture of CO2 and CO in MIL-127 at three different temperatures and pressures up to 12 bar were investigated by molecular simulations. The adsorption was simulated using Gibbs-Ensemble Monte Carlo (GEMC). The structure of the adsorbed phase and the diffusion in the MIL were investigated using Molecular Dynamics (MD) simulations. The adsorption selectivity of MIL-127 for CO2 over CO at 233 K was about 15. When combining adsorption and diffusion selectivities, a membrane selectivity of about 12 is predicted. For higher temperatures, both adsorption and diffusion selectivity are found to be smaller.

  15. Ciberprens@. El medio de los ‘diez mil nombres’

    Directory of Open Access Journals (Sweden)

    Dr. José Álvarez Marcos

    2000-01-01

    Full Text Available Los chinos han traducido el significado de World Wide Web como "la red de diez mil dimensiones en el cielo y la tierra". La telaraña cibernética no sólo se ha convertido en un gigantesco hipermercado de la información, donde confluyen medios tradicionales e innovadoras propuestas comunicativas, sino que aparece como el fenómeno de mayor impacto social de los últimos años. En un mundo donde la evolución tecnológica acorta cada vez más los ciclos de la innovación, como bien señala Díaz Nosty, Internet tiene visos de consolidarse como el embrión de la primera gran solución sostenible desde que apareció la televisión, al menos en una interpretación hecha desde el campo de análisis de los medios

  16. Metal organic framework g-C3N4/MIL-53(Fe) heterojunctions with enhanced photocatalytic activity for Cr(VI) reduction under visible light

    Science.gov (United States)

    Huang, Wenyuan; Liu, Ning; Zhang, Xiaodong; Wu, Minghong; Tang, Liang

    2017-12-01

    In this study, hybrid nanocomposites based on Fe-based MOF and graphitic carbon nitride (g-C3N4) were developed by a facile solvothermal method. The as-prepared materials were characterized by XRD, FESEM, TEM, XPS and PL analysis. It was showed that the introduction of a certain amount of g-C3N4 on the surface of MIL-53(Fe) would improve the separation and migration rate of photo-induced charges, consequently resulting in the boost of photocatalytic efficiency. Compared with g-C3N4 and MIL-53(Fe), the CMFe composites displayed more excellent visible light-resposive photocatalytic activity for the reduction of Cr(VI). The optimal doping content of g-C3N4 in g-C3N4/MIL-53(Fe) composite was determined to be 3.0 wt%, and it showed about 2.1 and 2.0 times as high photocatalytic efficiency for the reduction of Cr(VI) as that of pure g-C3N4 and MIL-53(Fe), respectively. Meanwhile, the composite exhibited good reusability and stability in the process of cyclic experiments. A possible photocatalytic reaction mechanism was also investigated in detail by the related electrochemical analysis.

  17. Enhanced catalytic activity over MIL-100(Fe) loaded ceria catalysts for the selective catalytic reduction of NOx with NH₃ at low temperature.

    Science.gov (United States)

    Wang, Peng; Sun, Hong; Quan, Xie; Chen, Shuo

    2016-01-15

    The development of catalysts for selective catalytic reduction (SCR) reactions that are highly active at low temperatures and show good resistance to SO2 and H2O is still a challenge. In this study, we have designed and developed a high-performance SCR catalyst based on nano-sized ceria encapsulated inside the pores of MIL-100(Fe) that combines excellent catalytic power with a metal organic framework architecture synthesized by the impregnation method (IM). Transmission electron microscopy (TEM) revealed the encapsulation of ceria in the cavities of MIL-100(Fe). The prepared IM-CeO2/MIL-100(Fe) catalyst shows improved catalytic activity both at low temperatures and throughout a wide temperature window. The temperature window for 90% NOx conversion ranges from 196 to 300°C. X-ray photoelectron spectroscopy (XPS) and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFT) analysis indicated that the nano-sized ceria encapsulated inside MIL-100(Fe) promotes the production of chemisorbed oxygen on the catalyst surface, which greatly enhances the formation of the NO2 species responsible for fast SCR reactions. Copyright © 2015 Elsevier B.V. All rights reserved.

  18. The Onset and Duration of Action of 0.2% Lidocaine in a One-per-Mil Tumescent Solution for Hand Surgery.

    Science.gov (United States)

    Prasetyono, Theddeus O H; Lestari, Puri A

    2016-05-01

    One-per-mil tumescent solution, which contains 0.2% lidocaine with 1:1,000,000 epinephrine, has been reported to be clinically effective for hand surgery under local anesthesia. However, it was lacking in its basic pharmacokinetics profile in regard to the onset of action (OOA) and duration of action (DOA). A randomized, double-blind study was conducted on 12 volunteers who met the inclusion criteria from October to November 2014. All volunteers had their right and left ring finger pulps injected with either one-per-mil solution or 2% lidocaine. Semmes-Weinstein and two-point discrimination tests were used to test sensation. Visual analogue scale was recorded at the time when the finger lost its sensation and when it regained normal sensation to measure the OOA and DOA. The data were then analyzed with a paired t-test and a Wilcoxon signed-rank test. The OOA and DOA of 2% plain lidocaine were 1 minute and 99.67 minutes, respectively. Meanwhile, 0.2% lidocaine in a one-per-mil tumescent solution showed an OOA of 5 minutes and a DOA of 186.83 minutes. The OOA of 0.2% lidocaine in a one-per-mil tumescent solution is statistically shorter than 2% plain lidocaine (P=0.04); while its DOA is statistically longer than 2% plain lidocaine (Pmil tumescent solution is statistically and clinically superior to 2% plain lidocaine in achieving longer duration of local anesthesia.

  19. Green synthesis and evaluation of an iron-based metal-organic framework MIL-88B for efficient decontamination of arsenate from water.

    Science.gov (United States)

    Hou, Shuliang; Wu, Yi-Nan; Feng, Lingyu; Chen, Wei; Wang, Ying; Morlay, Catherine; Li, Fengting

    2018-02-13

    Iron-containing metal-organic frameworks (MOFs) have gradually emerged as environmentally benign alternatives for reducing the levels of environmental contamination because of their advantages, such as readily obtained raw materials with low cost, nontoxic metal source with good biocompatibility, and distinguished physicochemical features e.g., high porosity, framework flexibility, and semiconductor properties. In this study, we reported an innovative strategy for synthesizing an iron-based MOF, MIL-88B, at room temperature. The novelty of this strategy was the use of ethanol as solvent and the pretreatment of dry milling with neither the bulk use of a toxic organic solvent nor the addition of extremely dangerous hydrofluoric acid or strong alkali. The synthesized MIL-88B(Fe) was evaluated as a sorbent for removing arsenate in water and it exhibited high adsorption capacity (156.7 mg g -1 ) at a low dosage. The removal capacity of trace arsenate on MIL-88B(Fe) was 32.3 mg g -1 at a low equilibrium concentration (6.4 μg L -1 ), which satisfied the arsenic threshold for drinking water. The results of Fourier transform infrared and X-ray photoelectron spectroscopy indicated that the As(v) molecules bonded with the oxygen molecules, which were coordinated with FeO clusters in the framework. This work presented the potential use of the up-scaled MIL-88B as an excellent sorbent for purifying arsenate-contaminated water.

  20. Adsorptive removal of dibenzothiophene from model fuels over one-pot synthesized PTA@MIL-101(Cr) hybrid material.

    Science.gov (United States)

    Jia, Shao-Yi; Zhang, Yan-Fei; Liu, Yong; Qin, Feng-Xiang; Ren, Hai-Tao; Wu, Song-Hai

    2013-11-15

    Hybrid nanomaterials comprising phosphotungstic acid (PTA) and MIL-101(Cr) were prepared through one-pot synthesis and post-modification methods and then were used as adsorbents of dibenzothiophene (DBT) from simulated diesel fuels. Samples obtained by different ways (encapsulation and impregnation) were characterized by nitrogen adsorption, transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier transform infrared spectrum (FT-IR) and series of adsorption experiments. The equilibrium adsorption capacities of PTA@MIL-101(Cr) illustrated that the direct introduction of PTA into MIL-101(Cr) during synthesis resulted in a 10.7% increase compared with MIL-101(Cr). However, porous hybrid adsorbent PTA/MIL-101(Cr) prepared via post-modification method exhibited lower adsorption capacity than virgin MIL-101(Cr). The theoretical maximum adsorption capacity (Q0) of PTA@MIL-101(Cr) is 136.5mg S/g adsorbent, 4.2 times of MIL-101(Cr). Even in competitive adsorption between aromatic compounds, which possess strong affinity with MOFs, and DBT, PTA@MIL-101(Cr) and MIL-101(Cr) remained their effectiveness in removal of DBT in the system. Based on these results, it can be presumed that MIL-101(Cr), modified properly, can be used as a promising adsorbent for eliminating aromatics and S-compounds in commercial fuels simultaneously. Copyright © 2013 Elsevier B.V. All rights reserved.

  1. Synthesis and sonocatalytic performance of a ternary magnetic MIL-101(Cr)/RGO/ZnFe2O4 nanocomposite for degradation of dye pollutants.

    Science.gov (United States)

    Nirumand, Ladan; Farhadi, Saeed; Zabardasti, Abedin; Khataee, Alireza

    2018-04-01

    In this study, new ternary magnetic MIL-101(Cr)/RGO/ZnFe 2 O 4 catalyst (with 30% wt of ZnFe 2 O 4 ) was synthesized via a hydrothermal route for sonodegradation of organic dyes. The structural, optical and magnetic properties of the nanocomposite were detected by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV-visible spectroscopy (UV-visible), field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX) spectroscopy, vibrating sample magnetometer (VSM), atomic force microscopy (AFM), Raman spectroscopy and BET surface area analysis. To evaluate the sonocatalytic activity of the as-prepared MIL-101(Cr)/RGO/ZnFe 2 O 4 nanocomposite, the H 2 O 2 -assisted degradation of organic dyes such as congo red (CR), methylene blue (MB), Rhodamine B (RhB) and methyl orange (MO) in aqueous solution was studied under ultrasound irradiation. The obtained results indicated that the ternary MIL-101(Cr)/RGO/ZnFe 2 O 4 nanocomposite had better performance for sonodegradation of these dyes than MIL-101(Cr)/RGO, pure MIL-101(Cr) or ZnFe 2 O 4 . The enhanced sonocatalytic performance of the as-prepared ternary nanocomposite could be attributed to the fast generation and separation of charge carriers (electrons and holes) in ZnFe 2 O 4 and MIL-101(Cr) and their transfer to the surface of graphene sheets. Moreover, the relatively high specific surface area of the MIL-101(Cr)/rGO and magnetic property of ZnFe 2 O 4 improve the degradation efficiency of the dyes. The recovery of the ternary magnetic sonocatalyst from treated water could be easily achieved using an external magnetic field. The main influence factors on the sonocatalytic activity such as catalyst dosage and dye initial concentration were also investigated. The trapping experiments indicated that OH radicals are the prominent active species in dye degradation. In addition, the reusability test, was also carried out to ensure the stability of the employed sonocatalyst

  2. Facile synthesis of highly efficient amorphous Mn-MIL-100 catalysts: The formation mechanism and the structure changes during the application for CO oxidation.

    Science.gov (United States)

    Zhang, Xiaodong; Li, Hongxin; Lv, Xutian; Xu, Jingcheng; Wang, Yuxin; He, Chi; Liu, Ning; Yang, Yiqiong; Wang, Yin

    2018-04-13

    A comprehensive study was carried out on amorphous metal-organic frameworks Mn-MIL-100 as efficient catalysts towards CO oxidation. This study focuses on explaining the crystalline-amorphous-crystalline transformations during thermolysis process of Mn-MIL-100 and studying the structure changes during the reaction process for CO oxidation. A possible formation mechanism of amorphous Mn-MIL-100 was proposed. Amorphous Mn-MIL-100 obtained by calcination at 250°C (a-Mn-250) showed a smaller specific surface area (4 m2/g), but displayed a high catalytic activity. Furthermore, the structure of amorphous Mn-MIL-100 was labile during the reaction process. When used a-Mn-250 were treated with reaction atmosphere at high temperature (named used a-Mn-250-S), the amorphous catalysts transformed to Mn2O3. Meanwhile, BET surface area (164 m2/g) and the catalytic performance both sharply increased. In addition, used a-Mn-250-S catalyst transformed from Mn2O3 to Mn3O4, resulting in the slightly decrease of catalytic activity under the presence of 1 vol% water vapor in the stream. A schematic of the structure changes during the reaction process was proposed. The achievement of our synthesis relies on the increase of BET surface area using CO as retreatment atmosphere, and the enhanced catalytic activity was attributed to the unique structure, a high quantity of surface active oxygen species, oxygen vacancies and good low temperature reduction behavior. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  3. Hydrothermal crystal growth and Vernier structures of the metal benzenedicarboxylates MIL-47 and MIL-53 containing guest molecules of benzenecarboxylic acid

    Energy Technology Data Exchange (ETDEWEB)

    Wang, Xiqu; Jacobson, Allan J., E-mail: ajjacob@uh.edu

    2016-04-15

    The nanoporous frameworks VO(bdc), MIL-47, and M(OH)(bdc), MIL-53; bdc=1,4-benzenedicarboxylate, can absorb various guest species in their channels. As synthesized, the channels are filled with H{sub 2}bdc molecules that have been reported to be disordered, except for [In(OH)bdc](H{sub 2}bdc){sub 3/4}, 1, which has a inorganic-organic hybrid Vernier structure with the H{sub 2}bdc molecules forming an ordered sublattice. Based on X-ray data from large single crystals grown by hydrothermal techniques, similar Vernier structures have been found for MIL-47, [VO(bdc)](H{sub 2}bdc){sub 5/7}, 2, MIL-53Al, [Al(OH)(bdc)](H{sub 2}bdc){sub 11/16}, 3, and MIL-53Ga, [Ga(OH)(bdc)](H{sub 2}bdc){sub 12/17}, 4. The Vernier structures of 2–4 at room temperature were determined based on superstructure unit cells that index both host and guest sublattices: 2, space group P2{sub 1}, a=23.903(2), b=17.191(2), c=25.722(2) Å, β=105.914(8)°; 3, P2{sub 1}/n, a=105.224(4), b=12.2441(5), c=17.0143(6) Å, β=89.99(1)°; 4, P2{sub 1}, a=114.562(5), b=12.1503(5), c=17.4275(7) Å, β=89.99(1)°. The number of guest H{sub 2}bdc molecules per framework metal ion is determined by the ratio of the repeat distances of the two sublattices which depends on the size of the metal ion in the octahedral chain. The octahedral chains are parallel to [201] in 2, and to [100] in 3 and 4. Remarkably, all atoms in 3 and 4 show significant sinusoidal modulations transverse to the chain axis. - Graphical abstract: The sinusoidal modulation along the channel axis direction involving all atoms in the structure of [Al(OH)(bdc)](H{sub 2}bdc){sub 11/16}. - Highlights: • Crystal growth of MIL-47, MIL-53Al, and MIL-53Ga. • The Vernier structures have corner-sharing MO6 octrahedral chains and chains of H2BDC molecules. • The stoichiometry is determined by the ratio of the host framework to the guest H2BDC column lengths. • A correlation is established between the stoichiometry and the radius of the metal ion

  4. Hydrothermal crystal growth and Vernier structures of the metal benzenedicarboxylates MIL-47 and MIL-53 containing guest molecules of benzenecarboxylic acid

    International Nuclear Information System (INIS)

    Wang, Xiqu; Jacobson, Allan J.

    2016-01-01

    The nanoporous frameworks VO(bdc), MIL-47, and M(OH)(bdc), MIL-53; bdc=1,4-benzenedicarboxylate, can absorb various guest species in their channels. As synthesized, the channels are filled with H 2 bdc molecules that have been reported to be disordered, except for [In(OH)bdc](H 2 bdc) 3/4 , 1, which has a inorganic-organic hybrid Vernier structure with the H 2 bdc molecules forming an ordered sublattice. Based on X-ray data from large single crystals grown by hydrothermal techniques, similar Vernier structures have been found for MIL-47, [VO(bdc)](H 2 bdc) 5/7 , 2, MIL-53Al, [Al(OH)(bdc)](H 2 bdc) 11/16 , 3, and MIL-53Ga, [Ga(OH)(bdc)](H 2 bdc) 12/17 , 4. The Vernier structures of 2–4 at room temperature were determined based on superstructure unit cells that index both host and guest sublattices: 2, space group P2 1 , a=23.903(2), b=17.191(2), c=25.722(2) Å, β=105.914(8)°; 3, P2 1 /n, a=105.224(4), b=12.2441(5), c=17.0143(6) Å, β=89.99(1)°; 4, P2 1 , a=114.562(5), b=12.1503(5), c=17.4275(7) Å, β=89.99(1)°. The number of guest H 2 bdc molecules per framework metal ion is determined by the ratio of the repeat distances of the two sublattices which depends on the size of the metal ion in the octahedral chain. The octahedral chains are parallel to [201] in 2, and to [100] in 3 and 4. Remarkably, all atoms in 3 and 4 show significant sinusoidal modulations transverse to the chain axis. - Graphical abstract: The sinusoidal modulation along the channel axis direction involving all atoms in the structure of [Al(OH)(bdc)](H 2 bdc) 11/16 . - Highlights: • Crystal growth of MIL-47, MIL-53Al, and MIL-53Ga. • The Vernier structures have corner-sharing MO6 octrahedral chains and chains of H2BDC molecules. • The stoichiometry is determined by the ratio of the host framework to the guest H2BDC column lengths. • A correlation is established between the stoichiometry and the radius of the metal ion. • All atoms in the Al and Ga compounds show sinusoidal

  5. Synthesis of MIL-100(Fe at Low Temperature and Atmospheric Pressure

    Directory of Open Access Journals (Sweden)

    Jing Shi

    2013-01-01

    Full Text Available MIL-100(Fe, a mesoporous metal-organic framework (MOF, has a large BET specific surface area and pore volume with the presence of a significant amount of accessible Lewis acid metal sites upon dehydration. The structural characteristics of MIL-100(Fe make it a good candidate for potential applications in gas storage, separation, and heterogeneous catalysis. Mainly, this MOF is obtained by the hydrothermal synthesis in a Teflon-lined autoclave at high temperature (>150°C under static conditions. However, this method has several disadvantages such as high temperature, high (autogenous pressure, long time, and comparable low MOF yield. Therefore, development of a facile method for synthesis of MIL-100(Fe is vitally important for fundamental understanding and practical application. Herein, MIL-100(Fe is synthesized by a facile low-temperature (90% still could be achieved, suggesting that this simple and energy saving method has the potential to be used practically.

  6. Endurance Pump Tests With Fresh and Purified MIL-PRF-83282 Hydraulic Fluid

    National Research Council Canada - National Science Library

    Sharma, Shashi

    1999-01-01

    .... Two endurance pump tests were conducted with F-16 aircraft hydraulic pumps, using both fresh and purified MIL-PRF-83282 hydraulic fluid, to determine if fluid purification had any adverse effect on pump life...

  7. Sustainable Catalysis: Rational Pd Loading on MIL-101Cr-NH2 for More Efficient and Recyclable Suzuki–Miyaura Reactions

    Science.gov (United States)

    Pascanu, Vlad; Yao, Qingxia; Bermejo Gómez, Antonio; Gustafsson, Mikaela; Yun, Yifeng; Wan, Wei; Samain, Louise; Zou, Xiaodong; Martín-Matute, Belén

    2013-01-01

    Palladium nanoparticles have been immobilized into an amino-functionalized metal–organic framework (MOF), MIL-101Cr-NH2, to form Pd@MIL-101Cr-NH2. Four materials with different loadings of palladium have been prepared (denoted as 4-, 8-, 12-, and 16 wt %Pd@MIL-101Cr-NH2). The effects of catalyst loading and the size and distribution of the Pd nanoparticles on the catalytic performance have been studied. The catalysts were characterized by using scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier-transform infrared (FTIR) spectroscopy, powder X-ray diffraction (PXRD), N2-sorption isotherms, elemental analysis, and thermogravimetric analysis (TGA). To better characterize the palladium nanoparticles and their distribution in MIL-101Cr-NH2, electron tomography was employed to reconstruct the 3D volume of 8 wt %Pd@MIL-101Cr-NH2 particles. The pair distribution functions (PDFs) of the samples were extracted from total scattering experiments using high-energy X-rays (60 keV). The catalytic activity of the four MOF materials with different loadings of palladium nanoparticles was studied in the Suzuki–Miyaura cross-coupling reaction. The best catalytic performance was obtained with the MOF that contained 8 wt % palladium nanoparticles. The metallic palladium nanoparticles were homogeneously distributed, with an average size of 2.6 nm. Excellent yields were obtained for a wide scope of substrates under remarkably mild conditions (water, aerobic conditions, room temperature, catalyst loading as low as 0.15 mol %). The material can be recycled at least 10 times without alteration of its catalytic properties. PMID:24265270

  8. Small Explorer Data System MIL-STD-1773 fiber optic bus

    Science.gov (United States)

    Flanegan, Mark; Label, Ken

    1992-01-01

    The MIL-STD-1773 Fiber Optic Data Bus as implemented in the GSFC Small Explorer Data System (SEDS) for the Small Explorer Program is described. It provides an overview of the SEDS MIL-STD-1773 bus components system design considerations, reliability figures, acceptance and qualification testing requirements, radiation requirements and tests, error handling considerations, and component heritage. The first mission using the bus will be launched in June of 1992.

  9. Bivalent metal-based MIL-53 analogues: Synthesis, properties and application

    International Nuclear Information System (INIS)

    Liu, Yongxin; Liu, Dan; Wang, Cheng

    2015-01-01

    Trivalent metal-based MIL-53 (Al 3+ , Cr 3+ , Fe 3+ , In 3+ ) compounds are interesting metal–organic frameworks (MOFs) with breathing effect and are promising gas sorption materials. Replacing bridging μ 2 -OH group by neutral ligands such as pyridine N-oxide and its derivatives (PNOs), the trivalent metal-based MIL-53 analogous structures could be extended to bivalent metal systems. The introduction of PNOs and bivalent metal elements endows the frameworks with new structural features and physical and chemical properties. This minireview summarizes the recent development of bivalent metal-based MIL-53 analogues (Mn 2+ , Co 2+ , Ni 2+ ), typically, focusing on the synthetic strategies and potential applications based on our own works and literatures. We present the synthetic strategy to achieve structures evolution from single-ligand-walled to double-ligand-walled channel. Properties and application of these new materials in a wide range of potential areas are discussed including thermal stability, gas adsorption, magnetism and liquid-phase separation. Promising directions of this research field are also highlighted. - Graphical abstract: The recent development of bivalent metal-based MIL-53 analogues (Mn 2+ , Co 2+ , Ni 2+ ) on their synthetic strategies, properties and potential applications was reviewed. - Highlights: • Structure features of bivalent metal-based MIL-53 analogues are illustrated. • Important properties and application are presented. • Host–guest interactions are main impetus for liquid-phase separation. • Promising directions of bivalent metal-based MIL-53 analogues are highlighted

  10. Organic Linker Defines the Excited-State Decay of Photocatalytic MIL-125(Ti)-Type Materials.

    Science.gov (United States)

    Santaclara, Jara G; Nasalevich, Maxim A; Castellanos, Sonia; Evers, Wiel H; Spoor, Frank C M; Rock, Kamila; Siebbeles, Laurens D A; Kapteijn, Freek; Grozema, Ferdinand; Houtepen, Arjan; Gascon, Jorge; Hunger, Johannes; van der Veen, Monique A

    2016-02-19

    Recently, MIL-125(Ti) and NH2 -MIL-125(Ti), two titanium-based metal-organic frameworks, have attracted significant research attention in the field of photocatalysis for solar fuel generation. This work reveals that the differences between these structures are not only based on their light absorption range but also on the decay profile and topography of their excited states. In contrast to MIL-125(Ti), NH2 -MIL-125(Ti) shows markedly longer lifetimes of the charge-separated state, which improves photoconversion by the suppression of competing decay mechanisms. We used spectroelectrochemistry and ultrafast spectroscopy to demonstrate that upon photoexcitation in NH2 -MIL-125(Ti) the electron is located in the Ti-oxo clusters and the hole resides on the aminoterephthalate unit, specifically on the amino group. The results highlight the role of the amino group in NH2 -MIL-125(Ti), the electron donation of which extends the lifetime of the photoexcited state substantially. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  11. Elucidating the breathing of the metal-organic framework MIL-53(Sc) with ab initio molecular dynamics simulations and in situ X-ray powder diffraction experiments.

    Science.gov (United States)

    Chen, Linjiang; Mowat, John P S; Fairen-Jimenez, David; Morrison, Carole A; Thompson, Stephen P; Wright, Paul A; Düren, Tina

    2013-10-23

    Ab initio molecular dynamics (AIMD) simulations have been used to predict structural transitions of the breathing metal-organic framework (MOF) MIL-53(Sc) in response to changes in temperature over the range 100-623 K and adsorption of CO2 at 0-0.9 bar at 196 K. The method has for the first time been shown to predict successfully both temperature-dependent structural changes and the structural response to variable sorbate uptake of a flexible MOF. AIMD employing dispersion-corrected density functional theory accurately simulated the experimentally observed closure of MIL-53(Sc) upon solvent removal and the transition of the empty MOF from the closed-pore phase to the very-narrow-pore phase (symmetry change from P2(1)/c to C2/c) with increasing temperature, indicating that it can directly take into account entropic as well as enthalpic effects. We also used AIMD simulations to mimic the CO2 adsorption of MIL-53(Sc) in silico by allowing the MIL-53(Sc) framework to evolve freely in response to CO2 loadings corresponding to the two steps in the experimental adsorption isotherm. The resulting structures enabled the structure determination of the two CO2-containing intermediate and large-pore phases observed by experimental synchrotron X-ray diffraction studies with increasing CO2 pressure; this would not have been possible for the intermediate structure via conventional methods because of diffraction peak broadening. Furthermore, the strong and anisotropic peak broadening observed for the intermediate structure could be explained in terms of fluctuations of the framework predicted by the AIMD simulations. Fundamental insights from the molecular-level interactions further revealed the origin of the breathing of MIL-53(Sc) upon temperature variation and CO2 adsorption. These simulations illustrate the power of the AIMD method for the prediction and understanding of the behavior of flexible microporous solids.

  12. Application of Metal-Organic Framework Nano-MIL-100(Fe) for Sustainable Release of Doxycycline and Tetracycline.

    Science.gov (United States)

    Taherzade, Seyed Dariush; Soleimannejad, Janet; Tarlani, Aliakbar

    2017-08-06

    Nanostructures of MIL-100 were synthesized and used as a drug delivery platform for two members of the Tetracycline family. Doxycycline monohydrate (DOX) and Tetracycline hydrochloride (TC) were loaded separately on nano-MIL-100 (nanoparticles of drug@carrier were abbreviated as DOX@MIL-100 and TC@MIL-100). Characterizations were carried out using FT-IR, XRD, BET, DLS, and SEM. The FT-IR spectra revealed that the drugs were loaded into the framework of the carrier. The XRD patterns of DOX@MIL-100 and TC@MIL-100 indicated that no free DOX or TC were present. It could be concluded that the drugs are well dispersed into the pores of nano-MIL-100. The microporosity of the carrier was confirmed by BJH data. BET analysis showed a reduction in the free surface for both DOX@MIL-100 and TC@MIL-100. The release of TC and DOX was investigated, and it was revealed that MIL-100 mediated the drug solubility in water, which in turn resulted in a decrease in the release rate of TC (accelerating in DOX case) without lowering the total amount of released drug. After 48 h, 96 percent of the TC was sustain released, which is an unprecedented amount in comparison with other methods.

  13. Remarkable adsorptive removal of nitrogen-containing compounds from a model fuel by a graphene oxide/MIL-101 composite through a combined effect of improved porosity and hydrogen bonding

    Energy Technology Data Exchange (ETDEWEB)

    Ahmed, Imteaz; Jhung, Sung Hwa, E-mail: sung@knu.ac.kr

    2016-08-15

    Highlights: • Metal-organic frameworks (MIL-101) were composed with graphene oxide (GnO). • GnO/MIL-101 showed the highest adsorption capacity for indole and quinoline. • Adsorption mechanism was clearly shown based on adsorption results and FTIR. • GnO/MIL-101 might be applied commercially considering capacity and reusability. - Abstract: A composite was prepared by combining a highly porous metal-organic framework (MOF), MIL-101 (Cr-benzenedicarboxylate), and graphene oxide (GnO). The porosity of the composite increased appreciably by the addition of GnO up to a specific amount in the MOF, though further increases in the quantity of GnO was detrimental to porosity. The improved porosity of the GnO/MIL-101 composite was utilized for adsorptive denitrogenation (ADN) of a model fuel where indole (IND) and quinoline (QUI) were used as nitrogen-containing compounds (NCCs). It was found that both IND and QUI showed improved adsorption on the composite compared with pristine MIL-101 or GnO due to the improved porosity of the composite. Interestingly, the improvement in adsorption of IND was much higher than the quantity estimated for the porosity. Importantly, GnO/MIL-101 showed the highest adsorption capacities for NCCs. Irrespective of the studied solvents and co-presence of IND and QUI, the composite adsorbent performed ADN most effectively. This remarkable improvement is explained by the additional mechanism of hydrogen bonding between the surface functional groups of GnO and the hydrogen attached to the nitrogen atom of IND. This hydrogen bonding mechanism is also supported by the results of the adsorption of pyrrole and methylpyrrole. On the other hand, QUI does not show hydrogen-bonding capability, and therefore, its enhanced adsorption originates from only the increased porosity of the adsorbents.

  14. Remarkable adsorptive removal of nitrogen-containing compounds from a model fuel by a graphene oxide/MIL-101 composite through a combined effect of improved porosity and hydrogen bonding

    International Nuclear Information System (INIS)

    Ahmed, Imteaz; Jhung, Sung Hwa

    2016-01-01

    Highlights: • Metal-organic frameworks (MIL-101) were composed with graphene oxide (GnO). • GnO/MIL-101 showed the highest adsorption capacity for indole and quinoline. • Adsorption mechanism was clearly shown based on adsorption results and FTIR. • GnO/MIL-101 might be applied commercially considering capacity and reusability. - Abstract: A composite was prepared by combining a highly porous metal-organic framework (MOF), MIL-101 (Cr-benzenedicarboxylate), and graphene oxide (GnO). The porosity of the composite increased appreciably by the addition of GnO up to a specific amount in the MOF, though further increases in the quantity of GnO was detrimental to porosity. The improved porosity of the GnO/MIL-101 composite was utilized for adsorptive denitrogenation (ADN) of a model fuel where indole (IND) and quinoline (QUI) were used as nitrogen-containing compounds (NCCs). It was found that both IND and QUI showed improved adsorption on the composite compared with pristine MIL-101 or GnO due to the improved porosity of the composite. Interestingly, the improvement in adsorption of IND was much higher than the quantity estimated for the porosity. Importantly, GnO/MIL-101 showed the highest adsorption capacities for NCCs. Irrespective of the studied solvents and co-presence of IND and QUI, the composite adsorbent performed ADN most effectively. This remarkable improvement is explained by the additional mechanism of hydrogen bonding between the surface functional groups of GnO and the hydrogen attached to the nitrogen atom of IND. This hydrogen bonding mechanism is also supported by the results of the adsorption of pyrrole and methylpyrrole. On the other hand, QUI does not show hydrogen-bonding capability, and therefore, its enhanced adsorption originates from only the increased porosity of the adsorbents.

  15. MIL-53(Fe) MOF-mediated catalytic chemiluminescence for sensitive detection of glucose.

    Science.gov (United States)

    Yi, Xueling; Dong, Wenfei; Zhang, Xiaodan; Xie, Jianxin; Huang, Yuming

    2016-12-01

    Various analytical applications of metal-organic frameworks (MOFs) have been rapidly developed in the past few years. However, the employment of MOFs as catalysts in chemiluminescence (CL) analysis is rare. Here, for the first time, we found that MIL-53(Fe) MOFs could significantly enhance the CL of luminol in the presence of H 2 O 2 in an alkaline medium. The CL intensity in the luminol-H 2 O 2 -MIL-53(Fe) system was about 20 times higher than that in the luminol-H 2 O 2 system. Moreover, the XRD pattern of MIL-53(Fe) after CL reaction was almost the same as that of the original MIL-53(Fe), confirming the catalytic role of MIL-53(Fe) in the luminol-H 2 O 2 -MIL-53(Fe) system. The possible mechanism behind the enhancing phenomenon was discussed based on the results from the CL spectra, FL probe experiments, and active oxygen species measurements. By coupling with the glucose oxidase-based catalytic oxidation reaction, a sensitive and selective CL method was developed for the detection of glucose. There is a linear relationship between the logarithm of CL intensity and the logarithm of glucose concentration in the range from 0.1 to 10 μM, and a detection limit of 0.05 μM (S/N = 3) is obtained. The proposed method has been applied to the determination of glucose in human serum samples with satisfactory results. Graphical abstract MIL-53(Fe) MOFs are found to greatly enhance the chemiluminescence emission of the luminol-H 2 O 2 system, and this finding resulted in a new chemiluminescence method for biosensing of glucose when coupled with the glucose oxidase.

  16. Understanding and solving disorder in the substitution pattern of amino functionalized MIL-47(V).

    Science.gov (United States)

    Heinen, Jurn; Dubbeldam, David

    2016-03-14

    Electronic energies and elastic constants of four amino functionalized MIL-47(V) supercells were computed using plane wave density functional theory to determine the influence of the substituent positions on the organic linker. An inverse relationship between the ab initio energies and the elastic constants was found, indicating that the high electronic stability correlates with high mechanical stability. Torsion in all supercells was induced upon substitution, which caused strain in the NH2-MIL-47(V) supercell. The combined effect of the substituent bulkiness and the induced torsion reduced the pore volume of the NH2-MIL-47(V) structures by >7% and the surface area by >14% with respect to MIL-47(V). This reduction was confirmed by lower saturation capacities of methane, CO2 and benzene. When unfavourable substituent positions are chosen, large torsions caused a further reduction of the saturation capacity. Differences in surface area, pore volume and saturation capacity illustrate the importance of choosing the correct NH2-MIL-47(V) supercell.

  17. Chelating agent-free, vapor-assisted crystallization method to synthesize hierarchical microporous/mesoporous MIL-125 (Ti).

    Science.gov (United States)

    McNamara, Nicholas D; Hicks, Jason C

    2015-03-11

    Titanium-based microporous heterogeneous catalysts are widely studied but are often limited by the accessibility of reactants to active sites. Metal-organic frameworks (MOFs), such as MIL-125 (Ti), exhibit enhanced surface areas due to their high intrinsic microporosity, but the pore diameters of most microporous MOFs are often too small to allow for the diffusion of larger reactants (>7 Å) relevant to petroleum and biomass upgrading. In this work, hierarchical microporous MIL-125 exhibiting significantly enhanced interparticle mesoporosity was synthesized using a chelating-free, vapor-assisted crystallization method. The resulting hierarchical MOF was examined as an active catalyst for the oxidation of dibenzothiophene (DBT) with tert-butyl hydroperoxide and outperformed the solely microporous analogue. This was attributed to greater access of the substrate to surface active sites, as the pores in the microporous analogues were of inadequate size to accommodate DBT. Moreover, thiophene adsorption studies suggested the mesoporous MOF contained larger amounts of unsaturated metal sites that could enhance the observed catalytic activity.

  18. Petrology and Geochemistry of Unbrecciated Harzburgitic Diogenite MIL 07001: A Window Into Vestan Geological Evolution

    Science.gov (United States)

    Mittlefehldt, D. W.; Peng, Z. X.; Mertzman, S. A.; Mertzman, K. R.

    2014-01-01

    There is a strong case that asteroid 4 Vesta is the parent of the howardite, eucrite and diogenite (HED) meteorites. Models developed for the geological evolution of Vesta can satisfy the compositions of basaltic eucrites that dominate in the upper crust. The bulk compositional characteristics of diogenites - cumulate harzburgites and orthopyroxenites from the lower crust - do not fit into global magma ocean models that can describe the compositions of basaltic and cumulate eucrites. Recent more detailed formation models do make provision for a more complicated origin for diogenites, but this model has yet to be completely vetted. Compositional studies of bulk samples has led to the hypothesis that many diogenites were formed late by interaction of their parent melts with a eucritic crust, but those observations may alternatively be explained by subsolidus equilibration of trace elements between orthopyroxene and plagioclase and Ca-phosphate in the rocks. Differences in radiogenic Mg-26 content between diogenites and eucrites favors early formation of the former, not later formation. Understanding the origin of diogenites is crucial for understanding the petrologic evolution of Vesta. We have been doing coordinated studies of a suite of diogenites including petrologic investigations, bulk rock major and trace element studies, and in situ trace element analyses of orthopyroxene. Here we will focus on an especially unusual, and potentially key, diogenite, MIL 07001.

  19. Pyrolytic in situ magnetization of metal-organic framework MIL-100 for magnetic solid-phase extraction.

    Science.gov (United States)

    Huo, Shu-Hui; An, Hai-Yan; Yu, Jing; Mao, Xue-Feng; Zhang, Zhe; Bai, Lei; Huang, Yan-Feng; Zhou, Peng-Xin

    2017-09-29

    In this study, we report a facile, environmental friendly fabrication of a type of magnetic metal-organic framework (MOF) MIL-100 that can be used for magnetic solid-phase extraction (MSPE). The magnetic MOF composites were fabricated using in situ calcination method. The as-synthesized materials exhibited both high porosity and magnetic characteristics. They used for the MSPE of polycyclic aromatic hydrocarbons (PAHs) from water samples. Such MOF-based magnetic solid-phase extraction in combination with gas chromatography equipped with a flame ionization detector (GC-FID), exhibited wide linearity (0.02-250μgL -1 ), low detection limits (4.6-8.9ngL -1 ), and high enrichment factors (452-907) for PAHs. The relative standard deviations (RSDs) for intra- and inter-day extractions of PAHs were ranging from 1.7% to 9.8% and 3.8% to 9.2%, respectively. The recoveries for spiked PAHs (1μgL -1 ) in water samples were in the range of 88.5% to 106.6%. The results showed that the special anion-π orbital (electron donor-acceptor) interaction and π-π stacking between magnetic MIL-100 and PAHs play an important role in the adsorption of PAHs. Copyright © 2017. Published by Elsevier B.V.

  20. Efficient Pd@MIL-101(Cr) hetero-catalysts for 2-butyne-1,4-diol hydrogenation exhibiting high selectivity

    KAUST Repository

    Yin, Dongdong; Li, Chuang; Ren, Hangxing; Shekhah, Osama; Liu, Jinxuan; Liang, Changhai

    2017-01-01

    Pd@MIL-101(Cr) hetero-catalysts have been successfully prepared using the metal-organic chemical vapour deposition (MOCVD) approach, by choosing [Pd(η-CH)(η-CH)] as a volatile precursor, and the hydrothermally stable metal-organic framework, MIL-101

  1. Protonated MIL-125-NH2: Remarkable Adsorbent for the Removal of Quinoline and Indole from Liquid Fuel.

    Science.gov (United States)

    Ahmed, Imteaz; Khan, Nazmul Abedin; Yoon, Ji Woong; Chang, Jong-San; Jhung, Sung Hwa

    2017-06-21

    The removal of nitrogen-containing compounds (NCCs) from fossil fuels prior to combustion is currently of particular importance, and so we investigated an adsorptive method using metal-organic frameworks (MOFs) for the removal of indole (IND) and quinoline (QUI), which are two of the main NCCs present in fossil fuels. We herein employed an amino (-NH 2 )-functionalized MIL-125 (MIL-125-NH 2 ) MOF, which was further modified by protonation (P-MIL-125-NH 2 ). These modified MOFs exhibited extraordinary performance in the adsorption of both IND (as representative neutral NCC) and QUI (as representative basic NCC). These MOFs were one of the most efficient adsorbents for the removal of NCCs. For example, P-MIL-125-NH 2 showed the highest adsorption capacity for QUI among ever reported adsorbent. The improved adsorption of IND was explained by H-bonding and cation-π interactions for MIL-125-NH 2 and P-MIL-125-NH 2 , respectively, while the mechanisms for QUI were H-bonding and acid-base interactions, respectively. This is a rare phenomenon for a single material (especially not with very high porosity) to exhibit such remarkable performances in the adsorption of both basic QUI and neutral IND. The adsorption results obtained using regenerated MIL-125-NH 2 and P-MIL-125-NH 2 also showed that these materials can be used several times without any severe degradation.

  2. Thin Film Nanocomposite Membrane Filled with Metal-Organic Frameworks UiO-66 and MIL-125 Nanoparticles for Water Desalination

    Directory of Open Access Journals (Sweden)

    Mohammed Kadhom

    2017-06-01

    Full Text Available Knowing that the world is facing a shortage of fresh water, desalination, in its different forms including reverse osmosis, represents a practical approach to produce potable water from a saline source. In this report, two kinds of Metal-Organic Frameworks (MOFs nanoparticles (NPs, UiO-66 (~100 nm and MIL-125 (~100 nm, were embedded separately into thin-film composite membranes in different weight ratios, 0%, 0.05%, 0.1%, 0.15%, 0.2%, and 0.3%. The membranes were synthesized by the interfacial polymerization (IP of m-phenylenediamine (MPD in aqueous solution and trimesoyl chloride (TMC in an organic phase. The as-prepared membranes were characterized by scanning electron microscopy (SEM, transmission electron microscopy (TEM, contact angle measurement, attenuated total reflection Fourier transform infrared (ATR FT-IR spectroscopy, and salt rejection and water flux assessments. Results showed that both UiO-66 and MIL-125 could improve the membranes’ performance and the impacts depended on the NPs loading. At the optimum NPs loadings, 0.15% for UiO-66 and 0.3% for MIL-125, the water flux increased from 62.5 L/m2 h to 74.9 and 85.0 L/m2 h, respectively. NaCl rejection was not significantly affected (UiO-66 or slightly improved (MIL-125 by embedding these NPs, always at >98.5% as tested at 2000 ppm salt concentration and 300 psi transmembrane pressure. The results from this study demonstrate that it is promising to apply MOFs NPs to enhance the TFC membrane performance for desalination.

  3. CoFe2O4@MIL-100(Fe) hybrid magnetic nanoparticles exhibit fast and selective adsorption of arsenic with high adsorption capacity

    Science.gov (United States)

    Yang, Ji-Chun; Yin, Xue-Bo

    2017-01-01

    In this study, we report the synthesis and application of mesoporous CoFe2O4@MIL-100(Fe) hybrid magnetic nanoparticles (MNPs) for the simultaneous removal of inorganic arsenic (iAs). The hybrid adsorbent had a core-shell and mesoporous structure with an average diameter of 260 nm. The nanoscale size and mesoporous character impart a fast adsorption rate and high adsorption capacity for iAs. In total, 0.1 mg L−1 As(V) and As(III) could be adsorbed within 2 min, and the maximum adsorption capacities were 114.8 mg g−1 for As(V) and 143.6 mg g−1 for As(III), higher than most previously reported adsorbents. The anti-interference capacity for iAs adsorption was improved by the electrostatic repulsion and size exclusion effects of the MIL-100(Fe) shell, which also decreased the zero-charge point of the hybrid absorbent for a broad pH adsorption range. The adsorption mechanisms of iAs on the MNPs are proposed. An Fe-O-As structure was formed on CoFe2O4@MIL-100(Fe) through hydroxyl substitution with the deprotonated iAs species. Monolayer adsorption of As(V) was observed, while hydrogen bonding led to the multi-layer adsorption of neutral As(III) for its high adsorption capacity. The high efficiency and the excellent pH- and interference-tolerance capacities of CoFe2O4@MIL-100(Fe) allowed effective iAs removal from natural water samples, as validated with batch magnetic separation mode and a portable filtration strategy. PMID:28102334

  4. A novel metal-organic framework composite MIL-101(Cr)@GO as an efficient sorbent in dispersive micro-solid phase extraction coupling with UHPLC-MS/MS for the determination of sulfonamides in milk samples.

    Science.gov (United States)

    Jia, Xiuna; Zhao, Pan; Ye, Xiu; Zhang, Lianjun; Wang, Ting; Chen, Qinyu; Hou, Xiaohong

    2017-07-01

    As a novel material, metal-organic framework/graphite oxide (MIL-101(Cr)@GO) has great potential for the pretreatment of trace analytes. In the present study, MIL-101(Cr)@GO was synthesized using a solvothermal synthesis method at the nanoscale and was applied as sorbent in the dispersive micro-solid phase extraction (DMSPE) for the enrichment of the trace sulfonamides (SAs) from milk samples for the first time. Several experimental parameters including kinds of sorbents, the effect of pH, the amount of MIL-101(Cr)@GO, ionic strength, adsorption time, desorption solvent and desorption time were investigated. Under the optimal conditions, the linear ranges were from 0.1 to 10μg/L, 0.2-20μg/L or 0.5-50μg/L for the analytes with regression coefficients (r) from 0.9942 to 0.9999. The limits of detection were between 0.012 and 0.145μg/L. The recoveries ranged from 79.83% to 103.8% with relative standard deviations (RSDs)MIL-101(Cr)@GO exhibited remarkable advantages compared to MIL-101(Cr), MIL-100(Fe), activated carbon and other sorbent materials used in pretreatment methods. A simple, rapid, sensitive, inexpensive and less solvent consuming method of DMSPE-ultra-high performance liquid chromatography-tandem mass spectrometry (DMSPE-UHPLC-MS/MS) was successfully applied to the pre-concentration and determination of twelve SAs in milk samples. Copyright © 2016 Elsevier B.V. All rights reserved.

  5. Efficient Pd@MIL-101(Cr) hetero-catalysts for 2-butyne-1,4-diol hydrogenation exhibiting high selectivity

    KAUST Repository

    Yin, Dongdong

    2017-01-05

    Pd@MIL-101(Cr) hetero-catalysts have been successfully prepared using the metal-organic chemical vapour deposition (MOCVD) approach, by choosing [Pd(η-CH)(η-CH)] as a volatile precursor, and the hydrothermally stable metal-organic framework, MIL-101(Cr) as a support. The prepared Pd@MIL-101(Cr) hetero-catalysts characterized with various analytical techniques, exhibited highly monodispersed immobilized Pd nanoparticles in the MIL-101(Cr) cavities, while retaining the pristine crystallinity and porosity. The intact hybrid Pd@MIL-101(Cr) has been demonstrated to be an efficient catalyst for 2-butyne-1,4-diol hydrogenation with excellent activity, stability and selectivity (2-butene-1,4-diol (>94%)).

  6. Separation properties of the MIL-125(Ti) Metal-Organic Framework in high-performance liquid chromatography revealing cis/trans selectivity.

    Science.gov (United States)

    Van der Perre, Stijn; Liekens, Anuschka; Bueken, Bart; De Vos, Dirk E; Baron, Gino V; Denayer, Joeri F M

    2016-10-21

    Monodisperse MIL-125(Ti) Metal-Organic Framework crystals were synthesized and studied as stationary phase in high performance liquid chromatography (HPLC). Different pure compounds and model mixtures (including stereoisomer mixtures) were injected from which chromatographic parameters, including selectivities and resolution factors, were determined to evaluate the adsorption properties and separation performance of MIL-125(Ti) in liquid phase. The MIL-125(Ti) framework displayed a trans selectivity for cis/trans difunctionalized cyclohexane molecules with high selectivity and resolution for 1,3-dimethylcyclohexane and 4-ethylcyclohexanol. The slurry-packed column was further characterized via van Deemter analysis. Fitting of the van Deemter equation through the experimental points allowed to define the contributions of the different processes to plate height with a significant proportion of the A-term, reflecting the importance of a good crystal packing. Although high in comparison to commercial HPLC stationary phases, a very good plate height of around 50μm was found. Copyright © 2016 Elsevier B.V. All rights reserved.

  7. Fabrication of γ-Fe2O3 Nanoparticles by Solid-State Thermolysis of a Metal-Organic Framework, MIL-100(Fe, for Heavy Metal Ions Removal

    Directory of Open Access Journals (Sweden)

    Shengtao Hei

    2014-01-01

    Full Text Available Porous γ-Fe2O3 nanoparticles were prepared via a solid-state conversion process of a mesoporous iron(III carboxylate crystal, MIL-100(Fe. First, the MIL-100(Fe crystal that served as the template of the metal oxide was synthesized by a low-temperature (<100°C synthesis route. Subsequently, the porous γ-Fe2O3 nanoparticles were fabricated by facile thermolysis of the MIL-100(Fe powders via a two-step calcination treatment. The obtained γ-Fe2O3 was characterized by X-ray diffraction (XRD, N2 adsorption, X-ray photoelectron spectroscopy (XPS, and scanning electron microscopy (SEM techniques, and then used as an adsorbent for heavy metal ions removal in water treatment. This study illustrates that the metal-organic frameworks may be suitable precursors for the fabrication of metal oxides nanomaterials with large specific surface area, and the prepared porous γ-Fe2O3 exhibits a superior adsorption performance for As(V and As(III ions removal in water treatment.

  8. PPy@MIL-100 Nanoparticles as a pH- and Near-IR-Irradiation-Responsive Drug Carrier for Simultaneous Photothermal Therapy and Chemotherapy of Cancer Cells.

    Science.gov (United States)

    Zhu, Yu-Da; Chen, Su-Ping; Zhao, Huan; Yang, You; Chen, Xiao-Qin; Sun, Jing; Fan, Hong-Song; Zhang, Xing-Dong

    2016-12-21

    A medical nanoplatform with small size, low cost, biocompatibility, good biodegradability, and, in particular, multifunctionality has attracted much attention in the exploration of novel therapeutic methodologies. As an emerging material of self-assembled porous structure, metal-organic frameworks (MOFs) have high expectations because of their special properties compared to traditional porous materials. Therefore, integration of MOFs and functional materials is leading to the creation of new multifunctional composites/hybrids. Photothermal therapy (PTT), using near-IR (NIR) laser-absorbing nanomaterials as PTT agents, has shown encouraging therapeutic effects to photothermally ablate tumors. However, the most of widely used PTT agents are inorganic materials and nonbiodegradable. Herein, uniform polypyrrole (PPy) nanoparticles (NPs) with good biodegradability were synthesized by a microemulsion method. The PPy NPs were further coated with the mesoporous iron-based MOF structure MIL-100 by interaction between PPy NPs and MIL-100 precursors at room temperature. As a multifunctional nanoplatform, an anticancer drug could easily be loaded into the mesopores of the MIL-100 shell. The PPy core, as an organic photothermal agent, is able to photothermally ablate cancer cells and improve the efficacy of chemotherapy under NIR irradiation. The composites showed an outstanding in vivo synergistic anticancer capacity. Our work could encourage further study in the construction of a synergetic system using MOFs and organic PTT agents.

  9. MilQuant: a free, generic software tool for isobaric tagging-based quantitation.

    Science.gov (United States)

    Zou, Xiao; Zhao, Minzhi; Shen, Hongyan; Zhao, Xuyang; Tong, Yuanpeng; Wang, Qingsong; Wei, Shicheng; Ji, Jianguo

    2012-09-18

    Isobaric tagging techniques such as iTRAQ and TMT are widely used in quantitative proteomics and especially useful for samples that demand in vitro labeling. Due to diversity in choices of MS acquisition approaches, identification algorithms, and relative abundance deduction strategies, researchers are faced with a plethora of possibilities when it comes to data analysis. However, the lack of generic and flexible software tool often makes it cumbersome for researchers to perform the analysis entirely as desired. In this paper, we present MilQuant, mzXML-based isobaric labeling quantitator, a pipeline of freely available programs that supports native acquisition files produced by all mass spectrometer types and collection approaches currently used in isobaric tagging based MS data collection. Moreover, aside from effective normalization and abundance ratio deduction algorithms, MilQuant exports various intermediate results along each step of the pipeline, making it easy for researchers to customize the analysis. The functionality of MilQuant was demonstrated by four distinct datasets from different laboratories. The compatibility and extendibility of MilQuant makes it a generic and flexible tool that can serve as a full solution to data analysis of isobaric tagging-based quantitation. Copyright © 2012 Elsevier B.V. All rights reserved.

  10. Effect of Diamine in Amine-Functionalized MIL-101 for Knoevenagel Condensation

    International Nuclear Information System (INIS)

    Kasinathan, Palraj; Seo, You Kyong; Shim, Kyu Eun; Hwang, Young Kyu; Lee, U Hwang; Hwang, Dong Won; Hong, Do Young; Halligudi, Shiva B.; Chang, Jong San

    2011-01-01

    Have demonstrated that amines with different basicities successfully functionalized into the pores of MIL-101 and amine functionalized chromium terephthalate used as a base catalyst. The catalytic activity of amine functionalized MIL-101 in Knoevenagel condensation of ethylcyanoacetate and benzaldehyde depends on their basi-cities. The reactivity of these catalytic materials could be also affected by their pore size and/or surface area, which governs the facile diffusion of the molecules through the channels of the MIL-101. The present strategy ensures the development of new functionalities and lead to MOF applications of practically useful heterogeneous base catalysts for chemical transformations. Crystalline Metal-Organic Frameworks (MOFs) are currently an important kind of advanced functional materials due to their novel coordination structures, diverse topologies, and potential applications. As one of topical MOFs, porous chromium terephthalate with giant pores labeled MIL-101(Cr) possesses several unique features such as hierarchical pore structure including a mesoporous zeotype architecture, mesoporous cages and microporous windows, outstanding sorption properties, numerous unsaturated metal cation sites, and high hydrothermal and chemical stability. These properties have led to a number of application potential in catalysis, gas storage, drug delivery and adsorptive separation. One important challenge has to realize is funtionalization via incorporation of binding site or reactive centers for catalysis. The functionalization methods of metal organic frameworks (MOFs) in a wide range of applications are two possible approaches including pre- and post-modification with functional groups

  11. MIL-L-87177 and CLT:X-10 Lubricants Improve Electrical Connector Fretting Corrosion Behavior

    International Nuclear Information System (INIS)

    AUKLAND, NEIL R.; HANLON, JAMES T.

    1999-01-01

    We have conducted a fretting research project using MIL-L-87177 and CLT: X-10 lubricants on Nano-miniature connectors. When they were fretted without lubricant, individual connectors first exceeded our 0.5 ohm failure criteria from 2,341 to 45,238 fretting cycles. With additional fretting, their contact resistance increased to more than 100,000 ohms. Unmodified MIL-L-87177 lubricant delayed the onset of first failure to between 430,000 and over 20,000,000 fretting cycles. MIL-L-87177 modified by addition of Teflon powder delayed first failure to beyond 5 million fretting cycles. Best results were obtained when Teflon was used and also when both the straight and modified lubricants were poured into and then out of the connector. CLT: X-10 lubricant delayed the onset of first failure to beyond 55 million cycles in one test where a failure was actually observed and to beyond 20 million cycles in another that was terminated without failure. CLT: X-10 recovered an unlubricated connector driven deeply into failure, with six failed pins recovering immediately and four more recovering during an additional 420 thousand fretting cycles. MIL-L-87177 was not able to recover a connector under similar conditions

  12. Mil doscientos títulos de antropología colombiana: primera parte

    Directory of Open Access Journals (Sweden)

    Manuel Lucena Salmoral

    1969-08-01

    Full Text Available La aparición de estos mil doscientos títulos sobre antropología Colombiana representa un esfuerzo juvenil de universitarios javerianos, pertenecientes a distintas ciencias sociales, quienes fueron confluyendo a mis clases de Antropología Cultural guiados por la misma problemática: la búsqueda del hombre.

  13. Anti-UV Radiation Textiles Designed by Embracing with Nano-MIL (Ti, In)-Metal Organic Framework.

    Science.gov (United States)

    Emam, Hossam E; Abdelhameed, Reda M

    2017-08-23

    Protective textiles against harmful solar radiation are quite important materials for outdoor workers to secure their skin from several diseases. Current report focuses on production of anti-ultraviolet radiation (UVR) textiles by incorporation of nano-metal-organic frameworks (n-MOFs). Two different MIL-MOFs, namely, MIL-68(In)-NH 2 and MIL-125(Ti)-NH 2 , were immediately formed inside natural textiles (cotton and silk) matrix in nano size using quite simple and one-pot process. The formation of n-MIL-MOFs inside textiles were confirmed by using electron microscope and X-ray diffraction. Different size and morphology were seen depending on textile type reflecting the textiles' chemical composition role in the nature of prepared MIL-MOFs. For MIL-68(In)-NH 2 , particles with size distribution of 70.6-44.5 nm in cotton and 81.3-52.2 nm in silk were detected, while crystalline disc of MIL-125(Ti)-NH 2 was clearly seen inside textiles. The natural textiles exhibited full UVR blocking after modification, and the UV protection factor (UPF) was linearly proportional with MIL-MOFs and metal contents. Whatever metal type, direct incorporation of MIL-MOF contents greater than or equal to 10.4 g/kg was sufficient to attain excellent UV blocking property. Although 38.5-41.0% of MIL-MOFs was lost during five washings, the washed samples showed very good blocking rate (UPF = 26.7-36.2) supporting good laundering durability.

  14. Study and realisation of a gateway between a MIL1553 network and an Ethernet network. Implementation of the OS9NET homogeneous network and of the TCP/IP heterogeneous network on the OS-9/68000 real time operating system

    International Nuclear Information System (INIS)

    Tricot-Censier, Pascal

    1989-01-01

    This research thesis addresses the design of a homogeneous network for machines acquiring data in real time, and the interconnection by a heterogeneous network of this group with three groups of mini-computers, workstations, and personal computers. Thus, this work involved hardware as well as software designs and developments. After a recall of main notions related to networks, and a presentation of the OS9 real time core, the author reports the design and development of the Ethernet controller card. He reports the design and realisation of a gateway between Ethernet and MIL1553 which is notably based on the previously mentioned controller card. An Ethernet driver is then designed for the OS9 operating system. As the connection with other machines which do not support OS9, requires the development of applications using TCP/IP protocols, the author describes how software designed for PCs have been adapted for a use in real time and for the OS9 operating system. He presents an additional software layer to TCP/IP for an inter-process communication through a heterogeneous network. This layer allows the development of applications distributed among systems which possess different processors and operating systems. Finally, the author presents a test protocol which ensures the fast transfer of memory blocks between OS9 machines [fr

  15. Radiative cooling test facility and performance evaluation of 4-MIL aluminized polyvinyl fluoride and white-paint surfaces

    Energy Technology Data Exchange (ETDEWEB)

    Kruskopf, M.S.; Berdahl, P.; Martin, M.; Sakkal, F.; Sobolewski, M.

    1980-11-01

    A test facility designed to measure the amount of radiative cooling a specific material or assembly of materials will produce when exposed to the sky is described. Emphasis is placed upon assemblies which are specifically designed to produce radiative cooling and which therefore offer promise for the reduction of temperatures and/or humidities in occupied spaces. The hardware and software used to operate the facility are documented and the results of the first comprehensive experiments are presented. A microcomputer-based control/data acquisition system was employed to study the performance of two prototype radiator surfaces: 4-mil aluminized polyvinyl fluoride (PVF) and white painted surfaces set below polyethylene windscreens. The cooling rates for materials tested were determined and can be approximated by an equation (given). A computer model developed to simulate the cooling process is presented. (MCW)

  16. Novel thymine-functionalized MIL-101 prepared by post-synthesis and enhanced removal of Hg(2+) from water.

    Science.gov (United States)

    Luo, Xubiao; Shen, Tingting; Ding, Lin; Zhong, Weiping; Luo, Jianfeng; Luo, Shenglian

    2016-04-05

    A novel thymine-functionalized MIL-101 (MIL-101-Thymine) material was synthesized using a post-synthesis method to remove mercury at a high efficiency. MIL-101-Thymine was successfully prepared in this work and was confirmed by several characterization methods, such as (13)C nuclear magnetic resonance, X-ray diffraction, and infrared spectroscopy. The Hg(2+) adsorption agreed well with the Langmuir model, and the maximum adsorption capacity was 51.27mg/g. The adsorption rate fit with the pseudo-second-order kinetic model. Furthermore, MIL-101-Thymine exhibited excellent selectivity towards Hg(2+) over other cations, and the maximum value of the selective coefficient reached 947.34; this result is very likely due to the highly selective interactions of T-Hg(2+)-T in MIL-101-Thymine. The result of X-ray photoelectron spectroscopy also showed that Hg(2+) was coordinated with the N of thymine in MIL-101-Thymine. Moreover, the results of the thermogravimetric analysis and adsorption experiments showed that the Hg atom was two-coordinated with the thymine group. MIL-101-Thymine was used to remove trace Hg(2+) in real water samples, and satisfactory recoveries were obtained. Copyright © 2015 Elsevier B.V. All rights reserved.

  17. The metal-organic framework MIL-53(Al) constructed from multiple metal sources: alumina, aluminum hydroxide, and boehmite.

    Science.gov (United States)

    Li, Zehua; Wu, Yi-nan; Li, Jie; Zhang, Yiming; Zou, Xin; Li, Fengting

    2015-04-27

    Three aluminum compounds, namely alumina, aluminum hydroxide, and boehmite, are probed as the metal sources for the hydrothermal synthesis of a typical metal-organic framework MIL-53(Al). The process exhibits enhanced synthetic efficiency without the generation of strongly acidic byproducts. The time-course monitoring of conversion from different aluminum sources into MIL-53(Al) is achieved by multiple characterization that reveals a similar but differentiated crystallinity, porosity, and morphology relative to typical MIL-53(Al) prepared from water-soluble aluminum salts. Moreover, the prepared MIL-53(Al) constructed with the three insoluble aluminum sources exhibit an improved thermal stability of up to nearly 600 °C and enhanced yields. Alumina and boehmite are more preferable than aluminum hydroxide in terms of product porosity, yield, and reaction time. The adsorption performances of a typical environmental endocrine disruptor, dimethyl phthalate, on the prepared MIL-53(Al) samples are also investigated. The improved structural stability of MIL-53(Al) prepared from these alternative aluminum sources enables double-enhanced adsorption performance (up to 206 mg g(-1)) relative to the conventionally obtained MIL-53(Al). © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  18. Glycine post-synthetic modification of MIL-53(Fe) metal-organic framework with enhanced and stable peroxidase-like activity for sensitive glucose biosensing.

    Science.gov (United States)

    Dong, Wenfei; Yang, Liaoyuan; Huang, Yuming

    2017-05-15

    A facile and rapid post-synthetic strategy was proposed to prepare a glycine functionalized MIL-53(Fe), namely glycine-MIL-53(Fe), by a simple mixing of water dispersible MIL-53(Fe) and glycine. The FT-IR, SEM, XRD and zeta potential were used to characterize the glycine-MIL-53(Fe). The result showed that glycine post-synthetic modification of MIL-53(Fe) did not change in the morphology and crystal structure of MIL-53(Fe). Interestingly, compared with MIL-53(Fe), the glycine-MIL-53(Fe) exhibits an enhanced peroxidase-like activity, which could catalyze the oxidation of TMB by H 2 O 2 to produce an intensive color reaction. Kinetic analysis indicated that the K m of glycine-MIL-53(Fe) for TMB was one-tenth of that of MIL-53(Fe). The glycine-MIL-53(Fe) as peroxidase mimetic displays better stability under alkaline or acidic conditions than MIL-53(Fe). The good performance of glycine-MIL-53(Fe) over MIL-53(Fe) may be attributed to the increase of affinity between TMB and the glycine-MIL-53(Fe). With these characteristics, a simple and sensitive method was developed for the detection of H 2 O 2 and glucose. The linear detection range for H 2 O 2 is 0.10-10μM with a detection limit of 49nM, and glucose could be linearly detected in the range from 0.25 to 10μM with a detection limit of 0.13μM. The proposed method was successfully used for glucose detection in human serum samples. Copyright © 2017 Elsevier B.V. All rights reserved.

  19. MIL-STD-1553B Marconi LSI chip set in a remote terminal application

    Science.gov (United States)

    Dimarino, A.

    1982-11-01

    Marconi Avionics is utilizing the MIL-STD-1553B LSI Chip Set in the SCADC Air Data Computer application to perform all of the required remote terminal MIL-STD-1553B protocol functions. Basic components of the RTU are the dual redundant chip set, CT3231 Transceivers, 256 x 16 RAM and a Z8002 microprocessor. Basic transfers are to/from the RAM command of the bus controller or Z8002 processor. During transfers from the processor to the RAM, the chip set busy bit is set for a period not exceeding 250 microseconds. When the transfer is complete, the busy bit is released and transfers to the data bus occur on command. The LSI Chip Set word count lines are used to locate each data word in the local memory and 4 mode codes are used in the application: reset remote terminal, transmit status word, transmitter shut-down, and override transmitter shutdown.

  20. Electro-Synthetic Optimization of Host Material Based on MIL-100(Fe

    Directory of Open Access Journals (Sweden)

    Witri Wahyu Lestari

    2016-05-01

    Full Text Available Electro-synthesis of Metal-Organic Frameworks types of MIL-100(Fe (MIL = Material Institute of Lavoisier in ethanol: water (1: 1 with electrolyte TBATFB 0.1 M has been optimized by varying voltage (12, 13, 14 and 15 Volt and temperature (room temperature, 40, 60 and 80 °C. The product showed light brown powder which upon activation becomes dark brown. Optimum condition achieved during use voltage of 15 Volts and at a temperature of 40 °C with 33% yield. The obtained material was characterized by XRD and compared to CCDC 640536 simulated patterns to confirm the phase purity of the product. As comparison hydrothermal and reflux method have been carried out. Characterization by FTIR has also undertaken to ensure the coordination between the metal cation (Fe3+ and the BTC ligand (BTC = 1,3,5-Benzene Tri Carboxylate. Meanwhile pore analysis using SAA confirmed that MIL-100(Fe obtained by electrolysis method has a BET surface area reached till 569.191 m²/g with a total pore volume of 0.4540 cc/g and an average pore diameter reached 16 Å. Based on SEM analysis, morphology material show particle size between 0.4-8.6 μm and has a thermal stability up to 350 °C according thermo-gravimetric analysis. Due to the presence of Lewis acid sites on Fe-trimeric unit, porosity features on MIL-100(Fe and a fairly high thermal stability, this material is potentially used as the host material for the catalyst in the conversion reactions model for green diesel production.

  1. ENHANCEMENT OF ACIDITY AND CATALYTIC ACTIVITY OF ALUMINA BASED METAL ORGANIC FRAMEWORK (MIL-53 Al)

    OpenAIRE

    Yilmaz, Esra; Sert, Emine; Atalay, Ferhan Sami

    2017-01-01

    Metal organic frameworks are highly porous materials which are formed bycombination of metal precursor and salts as inorganic part and ligand asorganic part. They have many advantages such as low density, high surface area,tunable pore size and high porosity. Due to peculiar features, such asunsaturated metal active sites, high surface area and easily functionalization,its usage as catalyst are promising.  The MIL-53(Al) structure contains chains of transcorner-sharing [AlO4(OH)2] oc...

  2. Software support for Motorola 68000 microprocessor at CERN. M68MIL cross macro assembler

    International Nuclear Information System (INIS)

    Eicken, H. von.

    1983-01-01

    This document is a user's guide for programming the Motorola 68000 microprocessor in assembly language. It describes the programming model, addressing modes and instruction set of the M 68000 as well as the use of the M68mil cross macro assembler. Version 3.6 of the assembler has been installed at CERN on CDC, DEC VAX, IBM, Norsk Data and Siemens computers. The source code of the assembler is available from CERN on request. (orig.)

  3. MIL-STD-2411-1 Change 3. Notice Impacts to NAVAIR

    Science.gov (United States)

    2010-07-30

    Macedonia ZX Macais Nguema Biyogo MA Madagascar VD Madeira Islands (PO) MI Malawi MY Malaysia MV Maldives ML Mali MT Malta IM Isle of Man (UK) MIL...and Niger) PON Pointe Noire 1948 (Congo) POS Porto Santo 1936 (Porto Santo, Madeira Islands) HIT Prov. S. Chilean (S. Chile, 53 S.) PRPM Prov. S...Asia (Southeast Asia, Singapore) POS SE Base (Porte Santo) (Porto Santo & Madeira Islands) GRA SW Base (Faial, Graciosa, Pico, Sao Jorge, and

  4. HKUST-1 Membranes Anchored on Porous Substrate by Hetero MIL-110 Nanorod Array Seeds.

    Science.gov (United States)

    Mao, Yiyin; Cao, Wei; Li, Junwei; Sun, Luwei; Peng, Xinsheng

    2013-09-02

    Great anchors and seeds: Hetero-seeding growth processes and anchored nanorod arrays were successfully utilized in the synthesis of HKUST-1 membranes. These arrays were firmly anchored on porous substrates by using a MIL-110 nanorod array as both the anchor and seed. The resulting HKUST-1 membranes demonstrated good separation factors for binary gases exceeding the Knudson selectivity. Copyright © 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim.

  5. Edificio de viviendas. Ca´Granda, Milán

    Directory of Open Access Journals (Sweden)

    Gandolfi, Vittorio

    1959-04-01

    Full Text Available Con el nombre de "Ca'Granda" se ha querido designar el distrito, capaz de 6.000 habitantes, que el Ayuntamiento de Milán está construyendo, y en parte ha construido ya, en la zona detrás de las calles Fulvio Testi y Ospedale Maggiore; es decir, en el sector norte de la ciudad correspondiente a la dirección de mayor impulso del desarrollo urbanístico de lo habitado.

  6. Evaluation of electrical test conditions in MIL-M-38510 slash sheets

    Science.gov (United States)

    Sandgren, K.

    1980-08-01

    Adequacy of MIL-M-38510 slash sheet requirements for electrical test conditions in an automated test environment were evaluated. Military temperature range commercial devices of 13 types from 6 manufacturers were purchased. Software for testing these devices and for varying the test conditions was written for the Tektronix S-3260 test system. The devices were tested to evaluate the effects of pin-condition settling time, measurement sequence of the same and different D-C parameters, temperature sequence, differently defined temperature ambients, variable measurement conditions, sequence of time measurements, pin-application sequence, and undesignated pin condition ambiguity. An alternative to current tri-state enable and disable time measurements is proposed; S-3260 'open' and 'ground' conditions are characterized; and suggestions for changes in MIL-M-38510 slash sheet specifications and MIL-STD-883 test methods are proposed, both to correct errors and ambiguities and to facilitate the gathering of repeatable data on automated test equipment. Data obtained showed no sensitivity to measurement or temperature sequence nor to temperature ambient, provided that test times were not excessive. V sub ICP tests and some low current measurements required allowance for a pin condition settling time because of the test system speed. Some pin condition application sequences yielded incorrect measurements. Undefined terminal conditions of output pins were found to affect I sub OS and propagation delay time measurements. Truth table test results varied with test frequency and V sub IL for low-power Schottky devices.

  7. Trivalent Chromium Process (TCP) as a Sealer for MIL-A-8625F Type II, IIB, and IC Anodic Coatings

    National Research Council Canada - National Science Library

    Matzdorf, Craig; Beck, Erin; Hilgeman, Amy; Prado, Ruben

    2008-01-01

    This report documents evaluations of trivalent chromium compositions (TCP) as sealers for MIL-A-8625F Type II, IIB, and IC anodic coatings conducted from March 2001 through December 2007 by Materials Engineering...

  8. Intermodal Storage and Transport Frame (ISTF) MIL-STD-1660 Design Criteria for Ammunition Unit Loads Tests

    National Research Council Canada - National Science Library

    Barickman, Philip

    2004-01-01

    .... The ISTF was evaluated by the testing procedures set forth in MIL-STD-1660. Stacking, vibration, edgewise rotational drop, incline impact, sling compatibility, forklifting, and disassembly testing were conducted on the ISTF units...

  9. Purification of Contaminated MIL-PRF-83282 Hydraulic Fluid Using the Pall Purifier and Multiple Process Configurations (Preprint)

    National Research Council Canada - National Science Library

    Snyder, Jr., Carl E; Gschwender, Lois J; Gunderson, Stephen L; Fultz, George W

    2006-01-01

    .... This report describes a project that evaluated the effectiveness of various hydraulic fluid purification process configurations on the removal of water and particulate contaminants from MIL-PRF-83282...

  10. PA171 Containers on a Wood Pallet with Metal Top Adapter, Air Pressure Tests During MIL-STD-1660 Tests

    National Research Council Canada - National Science Library

    2004-01-01

    ... (PM-MAS) to conduct Air Pressure Tests during MIL-STD-1660, "Design Criteria for Ammunition Unit Loads" testing on the PA171 containers on a wood pallet with metal top adapter as manufactured by Alliant Tech...

  11. Petits mils, énorme potentiel : diversifiés, nutritifs et adaptés aux ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    29 avr. 2016 ... La culture des petits mils en complément des cultures existantes ... Redynamiser la production de petits mils pourrait améliorer la nutrition et la santé en Inde, ... que nécessite leur transformation et de la perception négative que l'on en ... Increasing gender equality among small millet farmers in South Asia.

  12. Metal-organic frameworks as potential shock absorbers: the case of the highly flexible MIL-53(Al).

    Science.gov (United States)

    Yot, Pascal G; Boudene, Zoubeyr; Macia, Jasmine; Granier, Dominique; Vanduyfhuys, Louis; Verstraelen, Toon; Van Speybroeck, Veronique; Devic, Thomas; Serre, Christian; Férey, Gérard; Stock, Norbert; Maurin, Guillaume

    2014-08-28

    The mechanical energy absorption ability of the highly flexible MIL-53(Al) MOF material was explored using a combination of experiments and molecular simulations. A pressure-induced transition between the large pore and the closed pore forms of this solid was revealed to be irreversible and associated with a relatively large energy absorption capacity. Both features make MIL-53(Al) the first potential MOF candidate for further use as a shock absorber.

  13. Multiphysics Modeling and Simulations of Mil A46100 Armor-Grade Martensitic Steel Gas Metal Arc Welding Process

    Science.gov (United States)

    2013-05-23

    further. Application of the Scheil additive rule to MIL A46100 yielded the CCT diagram displayed in Fig. 8. The diagram displayed in Fig. 8 is obtained...computational procedure used to construct the TTTand CCT diagrams could be used to predict the incubation time for austenite decomposition under an...of austenite into allotriomorphic ferrite is Fig. 8 MIL A46100 CCT diagram corresponding to the TTT dia- gram displayed in Figure 7(a): CCT curves and

  14. Gestion intégrée du mildiou du mil en station au centre régional de ...

    African Journals Online (AJOL)

    user

    Le mil (Pennicetum glaucum) L.R.Br constitue 75% de la production céréalière du Niger. Cependant, son rendement est très faible dû à plusieurs types de contraintes. La maladie du mildiou du mil causé par un champignon Sclerospora graminicola (Sacc) Schroët, occupe une place importante. L'objectif de cette étude.

  15. Atomic Layer Deposition of Pt Nanoparticles within the Cages of MIL-101: A Mild and Recyclable Hydrogenation Catalyst

    Directory of Open Access Journals (Sweden)

    Karen Leus

    2016-03-01

    Full Text Available We present the in situ synthesis of Pt nanoparticles within MIL-101-Cr (MIL = Materials Institute Lavoisier by means of atomic layer deposition (ALD. The obtained Pt@MIL-101 materials were characterized by means of N2 adsorption and X-ray powder diffraction (XRPD measurements, showing that the structure of the metal organic framework was well preserved during the ALD deposition. X-ray fluorescence (XRF and transmission electron microscopy (TEM analysis confirmed the deposition of highly dispersed Pt nanoparticles with sizes determined by the MIL-101-Cr pore sizes and with an increased Pt loading for an increasing number of ALD cycles. The Pt@MIL-101 material was examined as catalyst in the hydrogenation of different linear and cyclic olefins at room temperature, showing full conversion for each substrate. Moreover, even under solvent free conditions, full conversion of the substrate was observed. A high concentration test has been performed showing that the Pt@MIL-101 is stable for a long reaction time without loss of activity, crystallinity and with very low Pt leaching.

  16. Structure and properties of Al-MIL-53-ADP, a breathing MOF based on the aliphatic linker molecule adipic acid.

    Science.gov (United States)

    Reinsch, Helge; Pillai, Renjith S; Siegel, Renée; Senker, Jürgen; Lieb, Alexandra; Maurin, Guillaume; Stock, Norbert

    2016-03-14

    The new aluminium based metal-organic framework [Al(OH)(O2C-C4H8-CO2)]·H2O denoted as Al-MIL-53-ADP-lp (lp stands for large pore) was synthesised under solvothermal conditions. This solid is an analogue of the archetypical aluminium terephthalate Al-MIL-53 based on the aliphatic single-chain linker molecule adipic acid (H2ADP, hexanedioic acid). In contrast to its aromatic counterparts, Al-MIL-53-ADP exhibits a structural breathing behaviour solely upon dehydration/rehydration. The crystal structure of the anhydrous compound denoted as Al-MIL-53-ADP-np (np stands for narrow pore) was determined by a combination of forcefield-based computations and Rietveld refinement of the powder X-ray diffraction data while the structure of the hydrated form Al-MIL-53-ADP-lp was derived computationally by a combination of force field based methods and Density Functional Theory calculations. Both structures were further supported by (1)H, (13)C and (27)Al high-resolution NMR MAS 1D data coupled again with simulations. Al-MIL-53-ADP was further characterised by means of vibrational spectroscopy, elemental analysis, thermogravimetry and water vapour sorption.

  17. Programming MIL-101Cr for selective and enhanced CO2 adsorption at low pressure by postsynthetic amine functionalization.

    Science.gov (United States)

    Khutia, Anupam; Janiak, Christoph

    2014-01-21

    MIL-101Cr fully or partially (p) postsynthetically modified with nitro (-NO2) or amino (-NH2) groups was shown to be a robust, water stable, selective and enhanced carbon dioxide (CO2) adsorption material with the amine-functionality. The highly microporous amine-modified frameworks (up to 1.6 cm(3) g(-1) total pore volume) exhibit excellent thermal stability (>300 °C) with BET surface areas up to 2680 m(2) g(-1). At 1 bar (at 273 K) the gases CO2, CH4 and N2 are adsorbed up to 22.2 wt%, 1.67 wt% and 2.27 wt%, respectively. The two amine-modified MIL-101Cr-NH2 (4) and MIL-101Cr-pNH2 (5) showed the highest gas uptake capacities in the series with high ratios for the CO2 : N2 and CO2 : CH4 selectivities (up to 119 : 1 and 75 : 1, respectively, at 273 K). Comparison with non-modified MIL-101Cr traces the favorable CO2 adsorption properties of MIL-101Cr-NH2 (4) and MIL-101Cr-pNH2 (5) to the presence of the Lewis-basic amine groups. MIL-101Cr-NH2 (4) has a high isosteric heat of adsorption of 43 kJ mol(-1) at zero surface coverage and also >23 kJ mol(-1) over the entire adsorption range, which is well above the heat of liquefaction of bulk CO2. Large CO2 uptake capacities of amine-functionalized 4 and 5, coupled with high adsorption enthalpy, high selectivities and proven long-term water stability, make them suitable candidates for capturing CO2 at low pressure from gas mixtures including the use as a CO2 sorbent from moist air.

  18. Aging method for electronic components and systems based on MIL-HDBK 217

    International Nuclear Information System (INIS)

    Declercq, M.; Simoens, F.

    1984-01-01

    Accelerated aging tests as requested to comply IEEE Std 323-1974, rise the question of the availability of an adequate aging model. After getting through the usual models, the authors describe an aging methodology based on MIL-HDBK 217. The method, taking into account several stress factors, is shown to yield on acceptable acceleration of time, while reducing the relative importance of temperature. Practical implementation of acceleration testing is discussed, and a summary of the gained experience is made and discussed in the scope of the philosophy of IEEE Std 650. Only natural thermal aging and functional aging, excluding irradiation or thermal shocks, are considered [fr

  19. Another Look at the Draft Mil-Std-1540E Unit Random Vibration Test Requirements

    Science.gov (United States)

    Perl, E.; Peterson, A. J..; Davis, D.

    2012-07-01

    The draft Mil-Std-1540E has been updated to reflect lessons learned since its publication as an SMC Standard in 2008, [1], and an earlier Aerospace Corporation Technical Report released in 2006, [2]. This paper discusses the technical rationale supporting some of the unit random vibration test requirements to provide better insight into their derivation and application to programs. It is intended that these requirements be tailored for each program to reflect the customer risk profile. Several tailoring options are provided and a two phase test strategy is discussed to highlight its applicability to utilizing heritage hardware in new applications.

  20. Diagnostic des systèmes de culture à base de mil [ Pennisetum ...

    African Journals Online (AJOL)

    Objectif : Le présent travail a pour objectif, de faire un état des lieux des systèmes de production à base de mil en Côte d'Ivoire septentrionale afin de proposer de nouvelles pistes d'amélioration. Méthodologie et résultats : L'approche méthodologique s'est reposée sur une enquête auprès des paysans sur le terrain dans ...

  1. Augmentation de la production de petits mils en Asie du Sud | CRDI ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    La production de petits mils, en dépit des vertus nutritionnelles de cette céréale, de sa capacité de croître dans des conditions difficiles et de sa facilité de stockage, a toujours été négligée par les politiques agricoles déployées en Asie du Sud. Ces dernières, en effet, ont privilégié les cultures de rente et les céréales comme ...

  2. Novel thymine-functionalized MIL-101 prepared by post-synthesis and enhanced removal of Hg{sup 2+} from water

    Energy Technology Data Exchange (ETDEWEB)

    Luo, Xubiao, E-mail: luoxubiao@126.com [Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang 330063 (China); College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063 (China); Shen, Tingting; Ding, Lin; Zhong, Weiping; Luo, Jianfeng [Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang 330063 (China); College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063 (China); Luo, Shenglian, E-mail: sllou@hnu.edu.cn [Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang 330063 (China); College of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang 330063 (China)

    2016-04-05

    Highlights: • A novel thymine-functionalized MIL-101 (MIL-101-Thymine) was first synthesized by post-synthesis method. • The resulting MIL-101-Thymine exhibited high Hg{sup 2+} adsorption. • MIL-101-Thymine exhibited excellent selectivity towards Hg{sup 2+} over other metal ions. • MIL-101-Thymine was used to remove trace Hg{sup 2+} with satisfactory recoveries in real water samples. - Abstract: A novel thymine-functionalized MIL-101 (MIL-101-Thymine) material was synthesized using a post-synthesis method to remove mercury at a high efficiency. MIL-101-Thymine was successfully prepared in this work and was confirmed by several characterization methods, such as {sup 13}C nuclear magnetic resonance, X-ray diffraction, and infrared spectroscopy. The Hg{sup 2+} adsorption agreed well with the Langmuir model, and the maximum adsorption capacity was 51.27 mg/g. The adsorption rate fit with the pseudo-second-order kinetic model. Furthermore, MIL-101-Thymine exhibited excellent selectivity towards Hg{sup 2+} over other cations, and the maximum value of the selective coefficient reached 947.34; this result is very likely due to the highly selective interactions of T-Hg{sup 2+}–T in MIL-101-Thymine. The result of X-ray photoelectron spectroscopy also showed that Hg{sup 2+} was coordinated with the N of thymine in MIL-101-Thymine. Moreover, the results of the thermogravimetric analysis and adsorption experiments showed that the Hg atom was two-coordinated with the thymine group. MIL-101-Thymine was used to remove trace Hg{sup 2+} in real water samples, and satisfactory recoveries were obtained.

  3. A Preliminary Report on the Strength and Metallography of a Bimetallic Friction Stir Weld Joint Between AA6061 and MIL-DTL-46100E High Hardness Steel Armor

    Science.gov (United States)

    2012-11-26

    bimetallic friction stir weld joint between AA6061 and MIL-DTL-46100E High Hardness steel armor. ABSTRACT One half inch thick plates of 6061-T6 aluminum...alloy and High Hardness steel armor (MIL- STD-46100) were successfully joined by the friction stir welding (FSW) process using a tungsten-rhenium...4. TITLE AND SUBTITLE A preliminary report on the strength and metallography of a bimetallic friction stir weld joint between AA6061 and MIL-DTL

  4. Post-synthetic modification of MIL-101(Cr) with pyridine for high-performance liquid chromatographic separation of tocopherols.

    Science.gov (United States)

    Yang, Fang; Yang, Cheng-Xiong; Yan, Xiu-Ping

    2015-05-01

    Effective separation of tocopherols is challenging and significant due to their structural similarity and important biological role. Here we report the post-synthetic modification of metal-organic framework (MOF) MIL-101(Cr) with pyridine for high-performance liquid chromatographic (HPLC) separation of tocopherols. Baseline separation of four tocopherols was achieved on a pyridine-grafted MIL-101(Cr) packed column within 10 min using hexane/isopropanol (96:4, v/v) as the mobile phase at a flow rate of 0.5 mL min(-1). The pyridine-grafted MIL-101(Cr) packed column gave high column efficiency (85,000 plates m(-1) for δ-tocopherol) and good precision (0.2-0.3% for retention time, 1.8-3.4% for peak area, 2.6-2.7% for peak height), and also offered much better performance than unmodified MIL-101(Cr) and commercial amino-bonded silica packed column for HPLC separation of tocopherols. The results not only show the promising application of pyridine-grafted MIL-101(Cr) as a novel stationary phase for HPLC separation of tocopherols, but also reveal a facile post-modification of MOFs to expand the application of MOFs in separation sciences. Copyright © 2015 Elsevier B.V. All rights reserved.

  5. MIL-100-Fe derived N-doped Fe/Fe3C@C electrocatalysts for efficient oxygen reduction reaction

    Science.gov (United States)

    Guo, Dakai; Han, Sancan; Wang, Jiacheng; Zhu, Yufang

    2018-03-01

    N-doped porous Fe/Fe3C@C electrocatalysts were prepared by the pyrolysis of the hexamethylenetetramine (HMT)-incorporated MIL-100-Fe at different temperatures (700-1000 °C) under N2 atmosphere. Rotary evaporation of MIL-100-Fe and HMT solution could make more N-enriched HMT molecules enter into the pores of MIL-100-Fe, thus improving nitrogen contents of the final pyrolyzed samples. All pyrolyzed samples show porous textures with middle specific surface areas. The X-ray photoelectron spectroscopy (XPS) results demonstrate the successful introduction of N atoms into carbon framework. Sample Fe-N2-800 prepared by annealing the precursors with the HMT/MIL-100-Fe weight ratio of 2 at 800 °C exhibits the best electrocatalytic activity towards the oxygen reduction reaction (ORR) in terms of onset potential and current density because of high graphitic N and pyridinic N content. The enwrapped Fe/Fe3C nanoparticles and Fe-Nx active sites in these samples could also boost the ORR activity synergistically. Moreover, sample Fe-N2-800 demonstrates a dominant four electron reduction process, as well as excellent long-term operation stability and methanol crossover resistance. Thus, the N-doped Fe/Fe3C@C composites derived from the HMT-incorporated MIL-100-Fe are promising electrocatalysts to replace Pt/C for ORR in practical applications.

  6. Evaluating the Implementation of the Re-Engineering Systems of Primary Care Treatment in the Military (RESPECT-Mil)

    Science.gov (United States)

    Wong, Eunice C.; Jaycox, Lisa H.; Ayer, Lynsay; Batka, Caroline; Harris, Racine; Naftel, Scott; Paddock, Susan M.

    2015-01-01

    Abstract A RAND team conducted an independent implementation evaluation of the Re-Engineering Systems of Primary Care Treatment in the Military (RESPECT-Mil) Program, a system of care designed to screen, assess, and treat posttraumatic stress disorder and depression among active duty service members in the Army's primary care settings. Evaluating the Implementation of the Re-Engineering Systems of Primary Care Treatment in the Military (RESPECT-Mil) presents the results from RAND's assessment of the implementation of RESPECT-Mil in military treatment facilities and makes recommendations to improve the delivery of mental health care in these settings. Analyses were based on existing program data used to monitor fidelity to RESPECT-Mil across the Army's primary care clinics, as well as discussions with key stakeholders. During the time of the evaluation, efforts were under way to implement the Patient Centered Medical Home, and uncertainties remained about the implications for the RESPECT-Mil program. Consideration of this transition was made in designing the evaluation and applying its findings more broadly to the implementation of collaborative care within military primary care settings. PMID:28083389

  7. Au3+/Au0 Supported on Chromium(III Terephthalate Metal Organic Framework (MIL-101 as an Efficient Heterogeneous Catalystfor Three-Component Coupling Synthesis of Propargylamines

    Directory of Open Access Journals (Sweden)

    Lili Liu

    2017-01-01

    Full Text Available Post-synthesis modification is a useful method for the functionalization of metal–organic frameworks (MOFs. A novel catalyst Au@MIL-101-ED-SA (ED = ethylenediamine, SA = salicylaldehyde, containing coexisting Au3+ ions and Au0 nanoparticles, was prepared successfully by post-synthesis modification with ethylenediamine, salicylaldehyde and gold. Gold nanoparticles supported on MIL-101 (Au@MIL-101 were prepared successfully by the impregnation method. Au@MIL-101-ED-SA and Au@MIL-101 were characterized by N2 adsorption–desorption, X-ray diffraction, infrared spectroscopy, thermogravimetric analysis, X-ray photoelectron spectroscopy, and inductively coupled plasma-optical emission spectrometry. Au@MIL-101-ED-SA and Au@MIL-101 were applied as environmentally friendly catalysts in the three-component coupling reaction of aldehydes, amines, and alkynes for the preparation of diverse propargylamines. Au@MIL-101-ED-SA contained a fraction of cationic gold (Au3+/Au0 = 0.9 and showed higher catalytic activity than Au@MIL-101, which was prepared by the impregnation method. Furthermore, the reactions were performed under heterogeneous conditions and the novel catalyst was successfully recycled for four consecutive runs.

  8. Ru Nanoparticles Supported on MIL-101 by Double Solvents Method as High-Performance Catalysts for Catalytic Hydrolysis of Ammonia Borane

    Directory of Open Access Journals (Sweden)

    Tong Liu

    2015-01-01

    Full Text Available Highly dispersed crystalline Ru nanoparticles (NPs were successfully immobilized inside the pores of MIL-101 by a double solvents method (DSM. HRTEM clearly demonstrated the uniform distribution of the ultrafine Ru NPs throughout the interior cavities of MIL-101. The synthesized Ru@MIL-101 catalyst was also characterized by X-ray diffraction (XRD, N2 adsorption desorption, and ICP-AES. The catalytic test indicated that the Ru NPs supported MIL-101 material exhibited exceedingly high activity and excellent durability for hydrogen generation from the catalytic hydrolysis of amine boranes.

  9. Application of novel metal organic framework, MIL-53(Fe) and its magnetic hybrid: For removal of pharmaceutical pollutant, doxycycline from aqueous solutions.

    Science.gov (United States)

    Naeimi, Shakiba; Faghihian, Hossein

    2017-07-01

    As a pharmaceutical pollutant, doxycycline causes contamination when enters into the environment. In this research MIL-53(Fe), and its magnetic hybrid MIL-53(Fe)/Fe 3 O 4 were synthesized and employed for removal of doxycycline from aqueous solutions. The adsorbents were characterized by XRD, SEM, BET, FTIR, EDAX, VSM and TG-DTG technique. The effect of different variables such as DOC concentration, pH, contacting time, and adsorbent dose on the removal efficiency was studied and under optimized conditions the adsorption capacity of 322mgg -1 was obtained. The adsorption process was kinetically fast and the equilibration was attained within 30min. The used adsorbent was easily separated from the solution by applying external magnetic field. The regenerated adsorbent retained most of its initial capacity after six regeneration steps. The effect of ionic strength was studied and it was indicated that removal of doxycycline from salt-containing water with moderate ionic strengths was quite feasible. Langmuir, Freundlich, Tempkin and Dubinin-Redushkevich isotherms were employed to describe the nature of adsorption process. The sorption data was well interpreted by the Longmuir model. Copyright © 2017 Elsevier B.V. All rights reserved.

  10. Exsolution of Iron-Titanium Oxides in Magnetite in Miller Range (MIL) 03346 Nakhlite: Evidence for Post Crystallization Reduction in the Nakhlite Cumulate Pile

    Science.gov (United States)

    Righter, Kevin; Keller, L. P.; Rahman, Z.; Christoffersen, R.

    2012-01-01

    MIL 03346 is one of the most mesostasis-rich nakhlites [1] and thought to have equilibrated at oxygen fugacities near the fayalite-magnetite-quartz oxygen (FMQ) buffer ([2,3]). Studies of FeTi oxides in nakhlites have led to additional constraints on their equilibration temperatures and fO2s [4,5,6,7]. Comparison of these results to fO2s calculated for shergottites indicates that nakhlites are among the most oxidized samples from the martian meteorite suite [2]. The mesostasis of MIL 03346 contains skeletal titanomagnetite. Several scientists noticed several years ago (e.g. [8]) that this titanomagnetite contains very fine oxidation-driven exsolution lamellae (Figure 1). However, the lamellae are so small that they cannot be characterized by electron microprobe analysis (EMPA). Here we select several areas for focused ion beam (FIB) extraction, prepare transmission electron microscopy (TEM) foils, and identify and analyze the lamellae using TEM at the Johnson Space Center (JSC). The resulting analyses are combined with previous work on nakhlites to interpret the thermal and oxidation history of this meteorite group.

  11. Estudios previos para la restauración de la azotea de la Casa Milá de Barcelona (Cataluña, España

    Directory of Open Access Journals (Sweden)

    Lacuesta Contreras, Raquel

    1993-12-01

    Full Text Available The Casa Milá of Barcelona, work of the architect Antoni Gaudí, built between 1906 and 1911, was purchased in by the Caixa de Catalunya which then started a process of restoration of the building. One of the stages of this intervention will consist of restoring the roof with all the architectural sculptural elements it contains (the staircase boxes, chimneys, ventilation towers and perimetral paths. A number of previous studies have been done to this end. They deal with the historical constructive, documentary and artistic aspects of all these elements as well as with an action proposal to be taken into account in the restoration project.

    La Casa Milá de Barcelona, obra del arquitecto Antoni Gaudí construida entre 1906 y 1911, fue adquirida en 1986 por la Caixa de Catalunya que a partir de entonces inició un proceso de restauración del edificio. Una de las fases de la intervención consistirá en restaurar la azotea con todos los elementos arquitectónicos-escultóricos que contiene (cajas de escalera, chimeneas, torres de ventilación y pasos de ronda. A tal fin, se han realizado unos estudios previos que contemplan los aspectos histórico-constructivos, documental y artístico de todos estos elementos, y también una propuesta de actuación a tener en cuenta en el proyecto de restauración.

  12. CuNi NPs supported on MIL-101 as highly active catalysts for the hydrolysis of ammonia borane

    Science.gov (United States)

    Gao, Doudou; Zhang, Yuhong; Zhou, Liqun; Yang, Kunzhou

    2018-01-01

    The catalysts containing Cu, Ni bi-metallic nanoparticles were successfully synthesized by in-situ reduction of Cu2+ and Ni2+ salts into the highly porous and hydrothermally stable metal-organic framework MIL-101 via a simple liquid impregnation method. When the total amount of loading metal is 3 × 10-4 mol, Cu2Ni1@MIL-101 catalyst shows higher catalytic activity comparing to CuxNiy@MIL-101 with different molar ratio of Cu and Ni (x, y = 0, 0.5, 1.5, 2, 2.5, 3). Cu2Ni1@MIL-101 catalyst has the highest catalytic activity comparing to mono-metallic Cu and Ni counterparts and pure bi-metallic CuNi nanoparticles in hydrolytic dehydrogeneration of ammonia borane (AB) at room temperature. Additionally, in the hydrolysis reaction, the Cu2Ni1@MIL- 101 catalyst possesses excellent catalytic performances, which exhibit highly catalytic activity with turn over frequency (TOF) value of 20.9 mol H2 min-1 Cu mol-1 and a very low activation energy value of 32.2 kJ mol-1. The excellent catalytic activity has been successfully achieved thanks to the strong bi-metallic synergistic effects, uniform distribution of nanoparticles and the bi-functional effects between CuNi nanoparticles and the host of MIL-101. Moreover, the catalyst also displays satisfied durable stability after five cycles for the hydrolytically releasing H2 from AB. The non-noble metal catalysts have broad prospects for commercial applications in the field of hydrogen-stored materials due to the low prices and excellent catalytic activity.

  13. Post synthetic modification of MIL-101(Cr) for S-shaped isotherms and fast kinetics with water adsorption

    International Nuclear Information System (INIS)

    Teo, How Wei Benjamin; Chakraborty, Anutosh; Kayal, Sibnath

    2017-01-01

    Highlights: • Modification of parent MIL-101(Cr) metal organic framework (MOF) employing alkali metal ions (Li + , Na + , K + ). • Surface characteristics of the parent and alkali doped MIL-101(Cr) adsorbents. • Water uptakes are measured for the temperatures ranging from 25 °C to 60 °C under static and dynamic conditions. • Isotherms and kinetics data are fitted with Langmuir analogy models. • The 5% Li-doped MIL-101(Cr) is suitable for adsorption cooling. - Abstract: This article presents the surface characteristics of alkali (Li + , Na + , K + ) doped MIL-101(Cr) metal organic frameworks (MOFs), and the structural properties are evaluated by scanning electron micrography (SEM), X-ray diffraction (XRD), thermo-gravimetric analyser (TGA) and N 2 adsorption analysis. The amount of water uptakes are measured by a gravimetric analyser for the temperatures ranging from 298 K to 333 K and pressures up to the saturated conditions. The experimentally measured isotherms and kinetics data are fitted with the equations developed from the concept of Langmuir analogy. The isosteric heat of adsorption is calculated employing Van’t Hoff equation in the pressure-temperature-uptake co-ordinate systems. The hydrophobic length at low pressure regions is shortened by the addition of alkali dopants. It is observed that the alkali (Na, K and Li) ions on MIL-101(Cr) MOF increase the water uptakes at lower relative pressure region with fast kinetics. We have shown here that the alkali doped MIL-101(Cr) MOFs can be used as potential adsorbents for various low temperature heat transmission applications such as adsorption assisted heat pump, cooling and desalination.

  14. Juegos de palabras y música en El Cortesano de Luis Milán

    Directory of Open Access Journals (Sweden)

    Alfonso Colella

    2015-12-01

    Full Text Available Este artículo analiza cómo, en El Cortesano, la música y la actuación musical se ven fuertemente afectadas por el carácter burlesco e ingenioso de todos los personajes que frecuentan las reuniones de Fernando de Aragón y de la reina Germana de Foix. Por lo tanto, el músico Milán, para cumplir con todas las expectativas de este mundo del entretenimiento y del juego, debe basarse necesariamente en una serie de opciones interpretativas que permitan actuaciones rápidas en función de las demandas de su público. Lo que emerge es una imagen del músico y de la música diferente de lo que se esperaría normalmente. En una sociedad de este tipo, no cuenta la música entendida en su estética y aspectos técnicos, sino la capacidad de gestionar las apariencias y someterse a las pruebas y los mandatos impuestos por los rituales del juego cortesano. Tenemos muchos ejemplos en que Milán se muestra con pasividad y sumisión. Pero es normal, porque esto entra en los códigos de la vida de la corte. This article takes into consideration El Cortesano (1561 by Luis Milán: in this text the musical performance is strongly influenced by the playful attitudes of the individuals who attended the court meetings of Fernando de Aragón and Germana de Foix. Therefore, the musician has to keep in mind every expectation of courtly entertainment and gaming, and morevoer he must open his interpretative options to meet also the demands of the public. What emerges is a picture of the musician and his music that is different from what one would expect in another social context. In such aristocratic society as the Duke of Calabria, music was not understood only in terms of its aesthetic values and technical aspects, but it also required that the player accepted the rituals of the courtly game.

  15. Feria de Milán. Pabellón de maquinaria pesada

    Directory of Open Access Journals (Sweden)

    Covre, Gino

    1960-04-01

    Full Text Available Después de demoler el edificio destinado a las exposiciones de los adelantos y mejoras de la mecánica pesada, las autoridades Que rigen estas manifestaciones de la mecánica en Milán, Italia, se entregaron a un estudio de conjunto del problema que para ellos constituía la construcción de un pabellón que sustituyera al destruido y que, tanto por sus condiciones intrínsecas como por su aspecto estático y funcional, supliera ampliamente a su antecesor. El solar disponible constituía una amplia parcela aislada, y se pensó, en principio, en un cuerpo arquitectónico de dos plantas, una en semisótano y otra superior que constituiría la sala general de las exposiciones.

  16. MIL-STD-1553 dynamic bus controller/remote terminal hybrid set

    Science.gov (United States)

    Friedman, S. N.

    This paper describes the performance, physical and electrical requirements of a Dual Redundant BUS Interface Unit (BIU) acting as a BUS Controller Interface Unit (BCIU) or Remote Terminal Unit (RTU) between a Motorola 68000 VME BUS and MIL-STD-1553B Multiplex Data Bus. A discussion of how the BIU Hybrid set is programmed, and operates as a BCIU or RTU, will be included. This paper will review Dynamic Bus Control and other Mode Code capabilities. The BIU Hybrid Set interfaces to a 68000 Microprocessor with a VME Bus using programmed I/O transfers. This special interface will be discussed along with the internal Dual Access Memory (4K x 16) used to support the data exchanges between the CPU and the BIU Hybrid Set. The hybrid set's physical size and power requirements will be covered. This includes the present Double Eurocard the BIU function is presently being offered on.

  17. Fabrication of core-shell MIL-101(Cr)@UiO-66(Zr) nanocrystals for hydrogen storage

    CSIR Research Space (South Africa)

    Ren, Jianwei

    2014-09-01

    Full Text Available of the individual metal-organic framework (MOF) components and the coreeshell hybrid crystals were also characterized. The hydrogen storage capacity exhibited by the resulting core eshell nanocrystals was 26% and 60% higher than those of pure phase MIL-101 and Ui...

  18. Interfacing the septa movement (DC motors) equipment to the PS control system and the MIL1553 bus

    CERN Document Server

    Dehavay, Claude

    1995-01-01

    Continuing the rejuvenation of the PS Control system , this application replaces the Single Transceiver Hybrid used to interface the Septa Movement Fquipment by a G64 system connected to the VME crate via the MIL1553 bus. This note explains the G64 hardware interface and details the standard message as defined in the Control Protocole for Power Converter, RF and Stepping Motor equipment.

  19. Towards protective MOFs: post-synthetic modification of MIL-101 with oxime groups and their interactions with toxic chemicals

    NARCIS (Netherlands)

    Grol, M. van; Gorzkowska-Sobasb, A.A.; Koning, M.C. de

    2017-01-01

    In an attempt to broaden the scope of protective MOFs towards toxic compounds, we decided to introduce a reactive (nucleophilic) functionality in MIL101 by post-synthesis modification 1,2. This functionality would complement already existing adsorptive properties with an ability to capture or

  20. Effets de la microdose sur la production du niébé, du mil et du ...

    African Journals Online (AJOL)

    respectivement pour le sorgho, le mil et le niébé comparativement au témoin. La microdose a été .... Les prix utilisés sont celui du marché local au moment des semis pour les engrais soit 17500 FCFA pour NPK et ..... Projet « Transfert de la.

  1. Selective recognition of 6-mercaptopurine based on luminescent metal-organic frameworks Fe-MIL-88NH₂.

    Science.gov (United States)

    Sun, Zhengjuan; Liu, Yali; Li, Yuanfang

    2015-03-15

    A novel and rapid spectrofluorometry method for the recognition of 6-mercaptopurine (6-MP) has been developed based on luminescent metal-organic frameworks Fe-MIL-88NH2 as fluorescent probe. The strong fluorescence of Fe-MIL-88NH2 at 430 nm could be quenched by 6-MP directly, and the Fe-MIL-88NH2 shows high selectivity for 6-MP compared to other thiol-containing amino acids such as homocysteine (Hcy), cysteine (Cys), glutathione (GSH), etc. Under optimal conditions, the relative fluorescence intensity was linearly proportional to the concentration of 6-MP in the range of 5-600 μM with the detection limit at 1.17 μM (S/N=3). Furthermore, the present approach has been successfully applied to the determination of 6-MP in human serum samples. The possible fluorescence quenching mechanism has also been investigated, where it is revealed that the quenching was attributed to competition of absorption of the light source energy as well as electron transfer between Fe-MIL-88NH2 and 6-MP. Copyright © 2014 Elsevier B.V. All rights reserved.

  2. Effets de la microdose sur la production du niébé, du mil et du ...

    African Journals Online (AJOL)

    Effets de la microdose sur la production du niébé, du mil et du sorgho en fonction la toposéquence. Fatimata Saba, Sibiri Jean Baptiste Taonda, Idriss Serme, Alimata A. Bandaogo, Augustin P. Sourwema, Adama Kabre ...

  3. Fluorescent metal-organic framework MIL-53(Al) for highly selective and sensitive detection of Fe3+ in aqueous solution.

    Science.gov (United States)

    Yang, Cheng-Xiong; Ren, Hu-Bo; Yan, Xiu-Ping

    2013-08-06

    Fluorescent metal-organic frameworks (MOFs) have received great attention in sensing application. Here, we report the exploration of fluorescent MIL-53(Al) for highly selective and sensitive detection of Fe(3+) in aqueous solution. The cation exchange between Fe(3+) and the framework metal ion Al(3+) in MIL-53(Al) led to the quenching of the fluorescence of MIL-53(Al) due to the transformation of strong-fluorescent MIL-53(Al) to weak-fluorescent MIL-53(Fe), allowing highly selective and sensitive detection of Fe(3+) in aqueous solution with a linear range of 3-200 μM and a detection limit of 0.9 μM. No interferences from 0.8 M Na(+); 0.35 M K(+); 11 mM Cu(2+); 10 mM Ni(2+); 6 mM Ca(2+), Pb(2+), and Al(3+); 5.5 mM Mn(2+); 5 mM Co(2+) and Cr(3+); 4 mM Hg(2+), Cd(2+), Zn(2+), and Mg(2+); 3 mM Fe(2+); 0.8 M Cl(-); 60 mM NO2(-) and NO3(-); 10 mM HPO4(2-), H2PO4(-), SO3(2-), SO4(2-), and HCOO(-); 8 mM CO3(2-), HCO3(-), and C2O4(2-); and 5 mM CH3COO(-) were found for the detection of 150 μM Fe(3+). The possible mechanism for the quenching effect of Fe(3+) on the fluorescence of MIL-53(Al) was elucidated by inductively coupled plasma-mass spectrometry, X-ray diffraction spectrometry, and Fourier transform infrared spectrometry. The specific cation exchange behavior between Fe(3+) and the framework Al(3+) along with the excellent stability of MIL-53(Al) allows highly selective and sensitive detection of Fe(3+) in aqueous solution. The developed method was applied to the determination of Fe(3+) in human urine samples with the quantitative spike recoveries from 98.2% to 106.2%.

  4. MIL-Ti metal-organic frameworks (MOFs) nanomaterials as superior adsorbents: Synthesis and ultrasound-aided dye adsorption from multicomponent wastewater systems.

    Science.gov (United States)

    Oveisi, Mina; Asli, Mokhtar Alina; Mahmoodi, Niyaz Mohammad

    2018-04-05

    Herein, 1,4-benzenedicarboxylate (BDC) and 2-amino-1,4-benzenedicarboxylate (NH 2 -BDC) as organic linkers and tetraisopropyl orthotitanate as a metal source were used to synthesize several metal-organic frameworks (MOFs) nanomaterials. Five Materials Institut Lavoisiers (MILs) as MOFs include MIL-125(Ti), NH 2 -MIL-125(Ti) and three MILs with different organic linkers molar ratios (BDC/NH 2 -BDC: 75/25, 50/50 and 25/75 denoted as MIL-X1, MIL-X2 and MIL-X3, respectively). The synthesized nanomaterials were used for ultrasound-aided adsorption of cationic dyes (Basic Red 46 (BR46), Basic Blue 41 (BB41) and Methylene Blue (MB)) from single and multicomponent (binary) systems. The BET, XRD, FTIR, SEM, TEM, TGA and zeta potential were used for characterizing the MILs. Dye removal followed pseudo-second order kinetics with constant rate of 0.20833, 0.00481 and 0.00051 mg/g min for BR46, BB41 and MB, respectively. In addition dye adsorption obeyed the Langmuir isotherm model and the experimental dye adsorption capacity for BR46, BB41 and MB was 1296, 1257 and 862 mg/g, respectively. The synthesized MIL showed high reusability and stability over three cycles. The adsorption thermodynamics data presented that dye removal was a spontaneous, endothermic and physical reaction. The free Gibbs energy for dye removal by the NH 2 -MIL-125(Ti) at 308K was -19.424, -15.721 and -17.413 kJ/mol for BR46, BB41 and MB, respectively. Copyright © 2017 Elsevier B.V. All rights reserved.

  5. Ship-in-a-bottle CMPO in MIL-101(Cr) for selective uranium recovery from aqueous streams through adsorption

    Energy Technology Data Exchange (ETDEWEB)

    De Decker, Jeroen [Department of Inorganic and Physical Chemistry, Center for Ordered Materials, Organometallics, and Catalysis (COMOC), Ghent University, Krijgslaan 281-S3, 9000 Ghent (Belgium); Folens, Karel [Laboratory of Analytical Chemistry and Applied Ecochemistry, Ghent University, Coupure Links 653, 9000 Ghent (Belgium); De Clercq, Jeriffa [Department of Materials, Textiles, and Chemical Engineering, Industrial Catalysis and Adsorption Technology (INCAT), Ghent University, Valentin, Vaerwyckweg 1, 9000 Ghent (Belgium); Meledina, Maria; Van Tendeloo, Gustaaf [EMAT, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp (Belgium); Du Laing, Gijs [Laboratory of Analytical Chemistry and Applied Ecochemistry, Ghent University, Coupure Links 653, 9000 Ghent (Belgium); Van Der Voort, Pascal, E-mail: pascal.vandervoort@ugent.be [Department of Inorganic and Physical Chemistry, Center for Ordered Materials, Organometallics, and Catalysis (COMOC), Ghent University, Krijgslaan 281-S3, 9000 Ghent (Belgium)

    2017-08-05

    Highlights: • Highly stable metal-organic framework, MIL-101(Cr), for uses in aqueous, acidic adsorption. • Uranium recovery from low concentration acidic solutions. • One-step ship-around-the-bottle synthetic approach to incorporate CMPO in MIL-101(Cr). • Highly selective U(VI) adsorbent in competition with a high variety of metals, incl. rare earths and transition metals. • Regenerable and reusable adsorbent via 0.1 M nitric acid stripping. - Abstract: Mesoporous MIL-101(Cr) is used as host for a ship-in-a-bottle type adsorbent for selective U(VI) recovery from aqueous environments. The acid-resistant cage-type MOF is built in-situ around N,N-Diisobutyl-2-(octylphenylphosphoryl)acetamide (CMPO), a sterically demanding ligand with high U(VI) affinity. This one-step procedure yields an adsorbent which is an ideal compromise between homogeneous and heterogeneous systems, where the ligand can act freely within the pores of MIL-101, without leaching, while the adsorbent is easy separable and reusable. The adsorbent was characterized by XRD, FTIR spectroscopy, nitrogen adsorption, XRF, ADF-STEM and EDX, to confirm and quantify the successful encapsulation of the CMPO in MIL-101, and the preservation of the host. Adsorption experiments with a central focus on U(VI) recovery were performed. Very high selectivity for U(VI) was observed, while competitive metal adsorption (rare earths, transition metals...) was almost negligible. The adsorption capacity was calculated at 5.32 mg U/g (pH 3) and 27.99 mg U/g (pH 4), by fitting equilibrium data to the Langmuir model. Adsorption kinetics correlated to the pseudo-second-order model, where more than 95% of maximum uptake is achieved within 375 min. The adsorbed U(VI) is easily recovered by desorption in 0.1 M HNO{sub 3}. Three adsorption/desorption cycles were performed.

  6. Ship-in-a-bottle CMPO in MIL-101(Cr) for selective uranium recovery from aqueous streams through adsorption

    International Nuclear Information System (INIS)

    De Decker, Jeroen; Folens, Karel; De Clercq, Jeriffa; Meledina, Maria; Van Tendeloo, Gustaaf; Du Laing, Gijs; Van Der Voort, Pascal

    2017-01-01

    Highlights: • Highly stable metal-organic framework, MIL-101(Cr), for uses in aqueous, acidic adsorption. • Uranium recovery from low concentration acidic solutions. • One-step ship-around-the-bottle synthetic approach to incorporate CMPO in MIL-101(Cr). • Highly selective U(VI) adsorbent in competition with a high variety of metals, incl. rare earths and transition metals. • Regenerable and reusable adsorbent via 0.1 M nitric acid stripping. - Abstract: Mesoporous MIL-101(Cr) is used as host for a ship-in-a-bottle type adsorbent for selective U(VI) recovery from aqueous environments. The acid-resistant cage-type MOF is built in-situ around N,N-Diisobutyl-2-(octylphenylphosphoryl)acetamide (CMPO), a sterically demanding ligand with high U(VI) affinity. This one-step procedure yields an adsorbent which is an ideal compromise between homogeneous and heterogeneous systems, where the ligand can act freely within the pores of MIL-101, without leaching, while the adsorbent is easy separable and reusable. The adsorbent was characterized by XRD, FTIR spectroscopy, nitrogen adsorption, XRF, ADF-STEM and EDX, to confirm and quantify the successful encapsulation of the CMPO in MIL-101, and the preservation of the host. Adsorption experiments with a central focus on U(VI) recovery were performed. Very high selectivity for U(VI) was observed, while competitive metal adsorption (rare earths, transition metals...) was almost negligible. The adsorption capacity was calculated at 5.32 mg U/g (pH 3) and 27.99 mg U/g (pH 4), by fitting equilibrium data to the Langmuir model. Adsorption kinetics correlated to the pseudo-second-order model, where more than 95% of maximum uptake is achieved within 375 min. The adsorbed U(VI) is easily recovered by desorption in 0.1 M HNO 3 . Three adsorption/desorption cycles were performed.

  7. Application of Fe3O4@MIL-100 (Fe) core-shell magnetic microspheres for evaluating the sorption of organophosphate esters to dissolved organic matter (DOM).

    Science.gov (United States)

    Pang, Long; Yang, Peijie; Yang, Huiqiang; Ge, Liming; Xiao, Jingwen; Zhou, Yifan

    2018-06-01

    Organophosphate esters (OPEs) are widely used as flame retardants and plasticizers in many products and materials. Because of the potential biologic toxicity on human beings, OPEs are regarded as a class of emerging pollutants. Dissolved organic matters (DOM) have significant effects on the bioavailability and toxicity of the pollutants in the environment. Negligible-depletion solid-phase microextraction (nd-SPME) is an efficient way for measuring the freely dissolved pollutants but suffers from long equilibrium time. Metal-organic frameworks (MOFs) are a class of porous crystalline materials with unique properties such as high pore volume, regular porosity, and tunable pore size, being widely used for the extraction of various organic compounds. Here we developed a novel method for quick determination the sorption coefficients of OPEs to DOM in aquatic phase using Fe 3 O 4 @MIL-100 (Fe) core-shell magnetic microspheres. The mesoporous structures of the as-synthesized microspheres hindered the extraction of OPEs which associated with humic acid due to the volume exclusion effect. However, the freely dissolved OPEs can access into the mesoporous and then were extracted by MIL-100 (Fe). Due to the small pore size (4.81 nm), large surface area (141 m 2  g -1 ), high pore volume (0.17 g 3  g -1 ), and ultra-thin MOFs layers, Fe 3 O 4 @MIL-100 (Fe) core-shell magnetic microspheres have large contact area for the analytes in aqueous phase and therefore the diffusion distance was largely shortened. Besides, the microspheres can be collected conveniently after the extraction process by applying a magnetic field. Compared to the nd-SPME method with 35 h equilibration time (t 90% ), the proposed method for these studied OPEs only need 24 min to achieve equilibration. The sorption coefficients (logK DOC ) of the OPEs to humic acid were ranged from 3.84-5.28, which were highly consistent with the results by using polyacrylate-coated fiber and polydimethylsiloxane

  8. Ni-Pt nanoparticles growing on metal organic frameworks (MIL-96) with enhanced catalytic activity for hydrogen generation from hydrazine at room temperature.

    Science.gov (United States)

    Wen, Lan; Du, Xiaoqiong; Su, Jun; Luo, Wei; Cai, Ping; Cheng, Gongzhen

    2015-04-07

    Well-dispersed bimetallic Ni-Pt nanoparticles (NPs) with different compositions have been successfully grown on the MIL-96 by a simple liquid impregnation method using NaBH4 as the reducing agent. Powder X-ray diffraction, transmission electron microscopy, energy-dispersive X-ray spectroscopy, N2 adsorption-desorption, and inductively coupled plasma-atomic emission spectroscopy measurements were employed to characterize the NiPt/MIL-96. Catalytic activity of NiPt/MIL-96 catalysts was tested in the hydrogen generation from the aqueous alkaline solution of hydrazine at room temperature. These catalysts are composition dependent on their catalytic activity, while Ni64Pt36/MIL-96 exhibits the highest catalytic activity among all the catalysts tested, with a turnover frequency value of 114.3 h(-1) and 100% hydrogen selectivity. This excellent catalytic performance might be due to the synergistic effect of the MIL-96 support and NiPt NPs, while NiPt NPs supported on other conventional supports, such as SiO2, carbon black, γ-Al2O3, poly(N-vinyl-2-pyrrolidone) (PVP), and the physical mixture of NiPt and MIL-96, all of them exhibit inferior catalytic activity compared to that of NiPt/MIL-96.

  9. El uso del hierro en la Casa Milá de Barcelona

    Directory of Open Access Journals (Sweden)

    Vila Rodríguez, Rafael

    1990-08-01

    Full Text Available The materials and construction systems, even the conception of the general structure, were for Gaudí no more than mediums at the service of the formal and spatial expression of his architectural imagination. Sometimes, the use of certain materials was indiscriminate or without sufficient guarantees. The Casa Milá is a good example. The use of laminated iron in the Pedrera, which allowed Gaudí to conceive a story independent of the façades —wall-screens of stone which seem to defy the law of gravity—, have been, at the same time, the main cause of the deterioration of these façades. In the case of the structure, the conceptual solution based on the use of iron has responded well to the static needs. This has not occured with the solutions —no less ingeneous but too improvlsed and risky— foreseen, also based on iron, to hold up the façade. Here, the material, subjected to the effects of humidity —favored by the form given to the stone—, has not resisted the passage of time very well.

    Los materiales y los sistemas constructivos, incluso la concepción de la estructura general, no eran para Gaudí más que medios al servicio de la expresividad formal y espacial de su imaginativa arquitectura. A veces, la utilización de algunos materiales se hizo de forma indiscriminada o sin suficientes garantías. La Casa Milá es un buen ejemplo. La utilización del hierro laminado en la Pedrera, que permitió a Gaudí concebir una planta libre independiente de las fachadas —muros-cortina de piedra que parecen desafiar la ley de la gravedad—, ha sido, al mismo tiempo, la causa principal del deterioro de estas fachadas. En el caso de la estructura, la solución conceptual basada en el uso del hierro ha respondido bien a las solicitudes estáticas. No ha ocurrido así con las soluciones —no menos ingeniosas pero excesivamente improvisadas y arriesgadas— previstas, también en base al hierro, para la sustentación de la fachada. Aqu

  10. Stable ABTS Immobilized in the MIL-100(Fe) Metal-Organic Framework as an Efficient Mediator for Laccase-Catalyzed Decolorization.

    Science.gov (United States)

    Liu, Youxun; Geng, Yuanyuan; Yan, Mingyang; Huang, Juan

    2017-06-02

    The successful encapsulation of 2,2'-azino-bis(3-ethylbenzthiazoline-6-sulfonic acid) (ABTS), a well-known laccase mediator, within a mesoporous metal-organic framework sample (i.e., MIL-100(Fe)) was achieved using a one-pot hydrothermal synthetic method. The as-prepared ABTS@MIL-100(Fe) was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectroscopy, nitrogen sorption, and cyclic voltammetry (CV). Our ABTS@MIL-100(Fe)-based electrode exhibited an excellent electrochemical response, indicating that MIL-100(Fe) provides an appropriate microenvironment for the immobilization and electroactivity of ABTS molecules. ABTS@MIL-100(Fe) was then evaluated as an immobilized laccase mediator for dye removal using indigo carmine (IC) as a model dye. Through the application of laccase in combination with a free (ABTS) or immobilized (ABTS@MIL-100(Fe)) mediator, decolorization yields of 95% and 94%, respectively, were obtained for IC after 50 min. In addition, following seven reuse cycles of ABTS@MIL-100(Fe) for dye treatment, a decolorization yield of 74% was obtained. Dye decolorization occurred through the breakdown of the chromophoric group by the Laccase/ABTS@MIL-100(Fe) system, and a catalytic mechanism was proposed. We therefore expect that the stability, reusability, and validity of ABTS@MIL-100(Fe) as a laccase mediator potentially render it a promising tool for dye removal, in addition to reducing the high running costs and potential toxicity associated with synthetic mediators.

  11. Modified Spectral Fatigue Methods for S-N Curves With MIL-HDBK-5J Coefficients

    Science.gov (United States)

    Irvine, Tom; Larsen, Curtis

    2016-01-01

    The rainflow method is used for counting fatigue cycles from a stress response time history, where the fatigue cycles are stress-reversals. The rainflow method allows the application of Palmgren-Miner's rule in order to assess the fatigue life of a structure subject to complex loading. The fatigue damage may also be calculated from a stress response power spectral density (PSD) using the semi-empirical Dirlik, Single Moment, Zhao-Baker and other spectral methods. These methods effectively assume that the PSD has a corresponding time history which is stationary with a normal distribution. This paper shows how the probability density function for rainflow stress cycles can be extracted from each of the spectral methods. This extraction allows for the application of the MIL-HDBK-5J fatigue coefficients in the cumulative damage summation. A numerical example is given in this paper for the stress response of a beam undergoing random base excitation, where the excitation is applied separately by a time history and by its corresponding PSD. The fatigue calculation is performed in the time domain, as well as in the frequency domain via the modified spectral methods. The result comparison shows that the modified spectral methods give comparable results to the time domain rainflow counting method.

  12. O dialogismo e as construções narrativas no game literário brasileiro: Memórias de um Sargento de Milícias

    Directory of Open Access Journals (Sweden)

    Patricia Margarida Farias Coelho

    2014-02-01

    Full Text Available Neste estudo, refletimos, a partir da proposta teórica-metodológica sobre o conceito dialogismo proposto por Bakhtin e buscamos depreender como foram construídas as narrativas para os games educativos. Este artigo tem dois objetivos: (i compreender como as narrativas são desenvolvidas para plataformas digitais e, (ii verificar  os aspectos dialógicos desenvolvidos por Bakhtin a partir da análise do jogo online. Dessa forma, tomamos como corpus o game: Memórias de um Sargento de Milícias. Nossa pesquisa encontra-se, em fase de desenvolvimento, mas constatamos que essa nova maneira de ler transforma e contribui positivamente para o acesso à literatura. Dialogism and narrative constructions in the Brazilian literary game Memórias de um Sargento de Milícias (Memoirs of a Militia Sergeant Abstract This study reflects on Bakhtin’s theoretical and methodological proposal about the concept of dialogism and the inferences on the construction of narratives for educational games. This paper has two objectives: (i to understand how narratives for digital platforms are developed, and (ii to check the dialogic aspects developed by Bakhtin from the analysis of the online game. In order to achieve the goals, the corpus chosen is the game Memoirs of a Militia Sergeant. Although this research is also in the development stage, this new way of reading has been found to contribute positively to and transform access to literature. Keywords: Educational game; literary work; dialogism; narrative; education.

  13. SEDS MIL-STD-1773 fiber optic data bus: Proton irradiation test results and spaceflight SEU data

    Energy Technology Data Exchange (ETDEWEB)

    LaBel, K.A.; Stassinopoulos, E.G.; Miller, J.T. (NASA/GSFC, Greenbelt, MD (United States)); Marshall, P. (NRL/SFA, Washington, DC (United States)); Dale, C. (NRL, Washington, DC (United States)); Crabtree, C.M. (Hughes/ST Systems Corp., Seabrook, MD (United States)); Gates, M.M. (Jackson and Tull, Seabrook, MD (United States))

    1993-12-01

    The Small Explorer Data System (SEDS) was launched in July of 1992 as part of the Solar Anomalous Magnetospheric Particle Explorer (SAMPEX) mission. The SEDS utilizes NASA's first MIL-STD-1773 Fiber Optic Multiplexed Data Bus (or 1773 bus) to communicate with other spacecraft subsystems in the space environment. The 1773 bus is the fiber optic version of the MIL-STD-1553 Data Bus, a electronic wire bus used in many avionics applications. The authors present proton test and space flight single event effect data for NASA's first fiber optic data bus. Bit error rate predictions based on a new proton direct ionization model agree well with flight data for proton belt and solar flare effects.

  14. Urea-modified metal-organic framework of type MIL-101(Cr) for the preconcentration of phosphorylated peptides

    International Nuclear Information System (INIS)

    Yang, Xiaoqing; Xia, Yan

    2016-01-01

    Mass spectrometry (MS) is the most powerful tool in phosphoproteomics research. However, phosphopeptides usually are present in low concentrations and their preconcentration therefore is highly desired. We describe a two-step method for the synthesis of a metal organic framework of the type MIL-101(Cr) that is modified with urea (then designated as MIL-101(Cr)-UR 2 ). It possesses large surface area, good solvent stability and high affinity for some phosphates. Due to the presence of modified urea functions, this material allows for selective and effective enrichment of phosphorylated peptides. It was successfully applied to the enrichment of phosphopeptides from non-fat-milk. The method was applied to the detection of phosphopeptides in a tryptic digest of β-casein where is showed a detection sensitivity as low as 10 −10 M. (author)

  15. Gas Metal Arc Welding Process Modeling and Prediction of Weld Microstructure in MIL A46100 Armor-Grade Martensitic Steel

    Science.gov (United States)

    2013-06-01

    earlier in Fig. 4(a) to construct the corresponding CCT diagram , Fig. 5. The diagram displayed in Fig. 5 is obtained under particular continuous-cooling...TTT and CCT diagrams are necessary, but not sufficient, input for a phase volume-fraction determination procedure. That is, in addition to knowing the...fraction of bainite to the instantaneous temperature for the MIL A46100 HAZ section which was described using TTT and CCT diagrams displayed in Fig. 4(a

  16. Interfacing the septa movement (DC motor) equipment to the PS control system and the MIL1553 bus

    CERN Document Server

    Dehavay, Claude

    1993-01-01

    Continuing the rejuvenation of the PS Control system , it is planned to replace the Single Transceiver Hybrid used to interface the Septa Movement Equipment by a G64 system connected to the VME crate via the MIL1553 bus. This note explains the G64 hardware interface and details the standard message as defined in the Control Protocole for Power Converter, RF and Stepping Motor equipment.

  17. Analysis of a MIL-L-27502 lubricant from a gas-turbine engine test by size-exclusion chromatography

    Science.gov (United States)

    Jones, W. R., Jr.; Morales, W.

    1983-01-01

    Size exclusion chromatography was used to determine the chemical degradation of MIL-L-27502 oil samples from a gas turbine engine test run at a bulk oil temperature of 216 C. Results revealed a progressive loss of primary ester and additive depletion and the formation of higher molecular weight products with time. The high molecular weight products absorbed strongly in the ultraviolet indicating the presence of chromophoric groups.

  18. Using the Auditory Hazard Assessment Algorithm for Humans (AHAAH) With Hearing Protection Software, Release MIL-STD-1474E

    Science.gov (United States)

    2013-12-01

    unfolding.” Invited article in NHCA’s Spectrum. 1997 MIL-STD-1474D. (1997). “Department of defense design criteria. Noise limits,” http...Passenger Safety, Washington, DC. Price, G. R. (1997). “Understanding hazard from intense sounds.” Invited seminar to Audiology Department, University of...Putting theory into practice.” In H. M. Borchgrevink (Ed.), Hearing and hearing prophylaxis, Scandinavian Audiology Supplement 16 (pp. 111-121

  19. Petits mils, énorme potentiel : diversifiés, nutritifs et adaptés aux ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    29 avr. 2016 ... Dans les pays en développement, le manque de diversité dans l'alimentation est l'une des principales causes de la malnutrition et de la prévalence de maladies non transmissibles comme le diabète. La culture des petits mils en complément des cultures existantes pourrait faire partie de la solution.

  20. Functionalized MIL-101 with imidazolium-based ionic liquids for the cycloaddition of CO2 and epoxides under mild condition

    Science.gov (United States)

    Liu, Dan; Li, Gang; Liu, Haiou

    2018-01-01

    A kind of multi-functional sites metal-organic framework (MOF) composite (MIL-101-IMBr) was successfully prepared by post-synthesis modification of MIL-101 with imidazolium-based ionic liquids. The ionic liquids not only functionalize as basic sites but also provide halide anions, which serve as a nucleophile in cycloaddition reaction. The prepared functional MOF materials were characterized by X-ray diffraction, fourier transform infrared spectroscopy, scanning electron microscopy, energy dispersive spectroscopy, N2 adsorption-desorption and CO2 temperature programmed desorption. The results of fourier transform infrared spectroscopy and energy dispersive spectroscopy show that the MIL-101-IMBr composite was successfully synthesized. The N2 adsorption-desorption results clearly demonstrated that the modified composites still preserve high BET surface area and total pore volume. The composite exhibits high catalytic activity for the cycloaddition of CO2 with epoxides under mild and co-catalyst free conditions. The conversion of propylene oxide was 95.8% and the selectivity of cyclic carbonate was 97.6% under 0.8 MPa at 80 °C for 4 h. Moreover, the catalyst can be used for at least five times.

  1. Solid-State NMR Spectroscopy Proves the Presence of Penta-coordinated Sc Sites in MIL-100(Sc).

    Science.gov (United States)

    Giovine, Raynald; Volkringer, Christophe; Ashbrook, Sharon E; Trébosc, Julien; McKay, David; Loiseau, Thierry; Amoureux, Jean-Paul; Lafon, Olivier; Pourpoint, Frédérique

    2017-07-18

    Advanced solid-state NMR methods and first-principles calculations demonstrate for the first time the formation of penta-coordinated scandium sites. These coordinatively unsaturated sites were shown during the thermal activation of scandium-based metal-organic frameworks (MOFs). A 45 Sc NMR experiment allows their specific observation in activated Sc 3 BTB 2 (H 3 BTB=1,3,5-tris(4-carboxyphenyl)benzene) and MIL-100(Sc) MOFs. The assignment of the ScO 5 groups is supported by the DFT calculations of NMR parameters. The presence of ScO 5 Lewis acid sites in MIL-100(Sc) explains furthermore its catalytic activity. The first NMR experiment to probe 13 C- 45 Sc distances is also introduced. This advanced solid-state NMR pulse sequence allows the demonstration of the shrinkage of the MIL-100(Sc) network when the activation temperature is raised. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

  2. Ammunition Peculiar Equipment (APE) 1995, NIR Propellant Analyzer, to MIL-STD-398, Military Standard Shields, Operational for Ammunition Operations, Criteria for Design of and Tests for Acceptance

    National Research Council Canada - National Science Library

    2003-01-01

    ... (SJMAC-DEM) to test the Ammunition Peculiar Equipment (APE) 1995 NIR Propellant Analyzer, to MIL-STD-398, "Military Standard Shields, Operational for Ammunition Operations, Criteria for Design of and Tests for Acceptance...

  3. MIL SPEC 28 Square Foot Fire Burnback and Extinguishment Testing of FireAde, FlameOut II and Hawk ALLFIRE

    National Research Council Canada - National Science Library

    Barrett, Kimberly D; Kalberer, Jennifer L

    2008-01-01

    ... for hydrocarbon fuel fires. This report documents the evaluation performed on the fire extinguishing agents FireAde 2000 AFFF LP, FlameOut II and Hawk ALLFORE in accordance with the parameters set forth in Military Specification ( MIL SPEC...

  4. Research of mercury removal from sintering flue gas of iron and steel by the open metal site of Mil-101(Cr).

    Science.gov (United States)

    Zhao, Songjian; Mei, Jian; Xu, Haomiao; Liu, Wei; Qu, Zan; Cui, Yong; Yan, Naiqiang

    2018-06-05

    Metal-organic frameworks (MOFs) adsorbent Mil-101(Cr) was introduced for the removal of elemental mercury from sintering flue gas. Physical and chemical characterization of the adsorbents showed that MIL-101(Cr) had the largest BET surface area, high thermal stability and oxidation capacity. Hg 0 removal performance analysis indicated that the Hg 0 removal efficiency of MIL-101(Cr) increased with the increasing temperature and oxygen content. Besides, MIL-101(Cr) had the highest Hg 0 removal performance compared with Cu-BTC, UiO-66 and activated carbon, which can reach about 88% at 250 °C. The XPS and Hg-TPD methods were used to analyze the Hg 0 removal mechanism; the results show that Hg 0 was first adsorbed on the surface of Mil-101(Cr), and then oxidized by the open metal site Cr 3+ . The generated Hg 2+ was then combined surface adsorbed oxygen of adsorbent to form HgO, and the open metal site Cr 2+ was oxidized to Cr 3+ by surface active oxygen again. Furthermore, MIL-101(Cr) had good chemical and thermal stability. Copyright © 2017 Elsevier B.V. All rights reserved.

  5. Ratiometric Fluorescence Sensing and Real-Time Detection of Water in Organic Solvents with One-Pot Synthesis of Ru@MIL-101(Al)-NH2.

    Science.gov (United States)

    Yin, Hua-Qing; Yang, Ji-Chun; Yin, Xue-Bo

    2017-12-19

    Ratiometric fluorescence detection attracts much attention because of its decreased environmental influence and easy-to-differentiate color and intensity change. Herein, a guest-encapsulation metal-organic framework (MOF), Ru@MIL-NH 2 , is prepared with 2-aminoterephthalic acid, AlCl 3 , and Ru(bpy) 3 2+ by a simple one-pot method for ratiometric fluorescence sensing of water in organic solvents. The rational selection of the excitation wavelength provides dual emission at 465 and 615 nm from Ru@MIL-NH 2 under a single excitation of 300 nm. High sensitivity, low detection limit (0.02% v/v), wide response range (0-100%), and fast response (less than 1 min) are obtained for ratiometric fluorescence sensing of water under single excitation with Ru@MIL-NH 2 as the probe. Moreover, the result of water content is independent of the concentration of Ru@MIL-NH 2 as the merit of ratiometric fluorescence detection. The response mechanism reveals that the protonation of the nitrogen atom of the MIL-NH 2 , the π-conjugation system, and the stable fluorescence of Ru(bpy) 3 2+ achieve the ratiometric fluorescence. The analysis of real spirit samples confirms the proposed method. A test strip is prepared with Ru@MIL-NH 2 for convenient use. We believe that such turn-on ratiometric host-guest MOFs and the rational selection of excitation wavelength will offer guidance for ratiometric fluorescence detection with wide applications.

  6. Fabrication of metal-organic framework MIL-88B films on stainless steel fibers for solid-phase microextraction of polychlorinated biphenyls.

    Science.gov (United States)

    Wu, Ye-Yu; Yang, Cheng-Xiong; Yan, Xiu-Ping

    2014-03-21

    Metal-organic frameworks (MOFs) have received considerable attention as novel sorbents for sample preparation due to their fascinating structures and functionalities such as large surface area, good thermal stability, and uniform structured nanoscale cavities. Here, we report the application of a thermal and solvent stable MOF MIL-88B with nanosized bipyramidal cages and large surface area for solid-phase microextraction (SPME) of polychlorinated biphenyls (PCBs). Novel MIL-88B coated fiber was fabricated via an in situ hydrothermal growth of MIL-88B film on etched stainless steel fiber. The MIL-88B coated fiber gave large enhancement factors (757-2243), low detection limits (0.45-1.32ngL(-1)), and good linearity (5-200ngL(-1)) for PCBs. The relative standard deviation (RSD) for six replicate extractions of PCBs at 100ngL(-1) on MIL-88B coated fiber ranged from 4.2% to 8.7%. The recoveries for spiked PCBs (10ngL(-1)) in water and soil samples were in the range of 79.7-103.2%. Besides, the MIL-88B coated fiber was stable enough for 150 extraction cycles without significant loss of extraction efficiency. The developed method was successfully applied to the determination of PCBs in water samples and soil samples. Copyright © 2014 Elsevier B.V. All rights reserved.

  7. Presentation of a salivary tumour si mil primitive lung with metastases of carcinoid tumour of the colon

    International Nuclear Information System (INIS)

    Cataldi, S.; Ximenez; Carzoglio, J.

    2010-01-01

    Introduction: Colon carcinoid tumors are primary tumors in the colon, a rare histology. The lung tumour Si mil - Amyloid is within primary lung tumours, infrequent histology and often behaves like a benign tumour. In this paper we present the case of a patient with a history of having undergone colon surgery for a malignant carcinoid. Two years after developing a lung salivary tumour simile initially presented as metastasis Colonic carcinoid lung tumour. Clinical case: It is about a female patient of 64 years, who in September 2008 he makes a right hemicolectomy extended by an occlusive syndrome sub. Anatomic Pathology (A P) accounted for Carcinoid Tumor Malignant one that committed the entire wall and 50 lymph nodes are resected, all free metastasis. The patient does not receive complementary treatments and an imaging over in December 2009 is evident in a tomographic study a bulky upper lobe pulmonary parenchymal process right. The fiberoptic bronchoscopy (Fob) showed complete obstruction of the right upper lobe bronchus by a vegetating process whose biopsy reported a malignant lung tumor commitment carcinoid support primitive colonic confirmed by immunohistochemistry (IHC). The March 23, 2010 takes place the right upper lobectomy with lymphadenectomy. The A P and IHC study confirmed adenosquamous carcinoma with stroma simile amiloide low degree of malignancy. This injury can be approved to a salivary tumour early lung simile. Bronchial compromised by tumor margin and 22 negative lymph nodes. The patient is referred for additional radiation treatment. Discussion: Tumours of salivary gland type of primitive lung is a very rare condition and diagnosis is a r arity . Usually they originate in the bronchial epithelium submucosal gland. Endo luminal lesions usually occur as infrequently and develop in outlying areas. The development of lung tumours unrelated bronchial structure has been explained by a possible origin from a primitive stem cell that can differentiate a

  8. Fabrication of core-shell Fe{sub 3}O{sub 4}@MIL-100(Fe) magnetic microspheres for the removal of Cr(VI) in aqueous solution

    Energy Technology Data Exchange (ETDEWEB)

    Yang, Qingxiang, E-mail: qxyangzz@163.com; Zhao, Qianqian; Ren, ShuangShuang; Lu, Qiongqiong; Guo, Xinmeng; Chen, Zhijun, E-mail: chenzj@zzuli.edu.cn

    2016-12-15

    Facile regeneration of an adsorbent is very important for commercial feasibility. One typical highly porous metal-organic framework (MOF) materials based on MIL-100(Fe) and magnetic iron oxide particles (denoted as MMCs) with diameter about of 350 nm were successfully synthesized. The growth of MIL-100(Fe) shell on the surface of Fe{sub 3}O{sub 4} was utilized precursor as crystal seed via in-situ step hydrothermal reaction. It is a simple way to obtain well organized core-shell MOF composites, compared to the step-by-step method. MMCs were firstly used to uptake of Cr(VI) anions in aqueous solution. Adsorption experiments were carried out in batch sorption mode investigating with the factors of contact time (0–1000 min), pH (from 2 to 12), dose of adsorbent (4–25 mg), and initial Cr(VI) concentration (range from 10 to 100 ppm). - Graphical abstract: One typical highly porous metal-organic framework (MOF) materials based on MIL-100(Fe) and magnetic iron oxide particles (denoted as MMCs) were successfully synthesized. Utilizing Fe{sub 3}O{sub 4} precursor as crystal seed to grow MIL-100(Fe) shell by in-situ step hydrothermal reaction. It is a simple way to obtain core-shell MOF composites. MMCs could effectively uptake of Cr(VI) anions in aqueous solution. - Highlights: • Fe{sub 3}O{sub 4}@MIL-100(Fe) composites with core-shell structure were successfully prepared through a simple method. • The influence factors on Cr(VI) adsorption by Fe{sub 3}O{sub 4}@MIL-100(Fe) were investigated. • Cr(VI) can efficiently adsorbed by Fe{sub 3}O{sub 4}@MIL-100(Fe) composites from aqueous solution.

  9. A sensitive and selective sensor for biothiols based on the turn-on fluorescence of the Fe-MIL-88 metal-organic frameworks-hydrogen peroxide system.

    Science.gov (United States)

    Sun, Zheng Juan; Jiang, Jun Ze; Li, Yuan Fang

    2015-12-21

    Herein, we present a novel strategy based on a "turn-on" fluorescence system made up of metal-organic frameworks Fe-MIL-88 and H2O2 for detecting biothiols in human serum. The nonfluorescent Fe-MIL-88 gives weak fluorescence in the presence of H2O2. Interestingly, it was found that biothiols such as glutathione (GSH), cysteine (Cys) or homocysteine (Hcy) could induce fluorescence turn-on of the Fe-MIL-88/H2O2 system. Under optimal conditions, the relative fluorescence intensity exhibited a good linear relationship in the range from 50 nM-10 μM for GSH (r = 0.994), 50 nM-10 μM for Cys (r = 0.990), and 50 nM-10 μM (r = 0.992) for Hcy; the detection limits of GSH, Cys and Hcy were 30 nM, 40 nM, and 40 nM respectively. Mechanism investigation reveals that biothiols could associate with Fe-MIL-88 via hydrogen bonding and electrostatic interaction followed by redox reaction between biothiols and Fe(3+) present in the Fe-MIL-88, Fe(3+) was thus reduced to Fe(2+), and then Fe(2+) could efficiently catalyze the decomposition of H2O2 to yield ˙OH radicals through the Fenton reaction. Besides, biothiols were able to reduce H2O2 to produce ˙OH radicals directly. Thus the Fe-MIL-88 as well as biothiols could cooperatively contribute to the activation of H2O2 to generate higher amounts of ˙OH radicals, which in turn oxidize the free ligand terephthalic acid (BDC) outside or within the Fe-MIL-88 structure to strongly fluorescent hydroxylated terephthalic acid (OHBDC), thereby turning on the fluorescence.

  10. Highly efficient Fenton and enzyme-mimetic activities of NH2-MIL-88B(Fe) metal organic framework for methylene blue degradation.

    Science.gov (United States)

    He, Jianchuan; Zhang, Yao; Zhang, Xiaodan; Huang, Yuming

    2018-03-26

    Here, we show that NH 2 -MIL-88B(Fe) can be used as a peroxidase-like catalyst for Fenton-like degradation of methylene blue (MB) in water. The iron-based NH 2 -MIL-88B(Fe) metal organic framework (MOF) was synthesized by a facile and rapid microwave heating method. It was characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, powder X-ray diffraction, and the Brunauer-Emmett-Teller method. The NH 2 -MIL-88B(Fe) MOF possesses intrinsic oxidase-like and peroxidase-like activities. The reaction parameters that affect MB degradation were investigated, including the solution pH, NH 2 -MIL-88B(Fe) MOF and H 2 O 2 concentrations, and temperature. The results show that the NH 2 -MIL-88B(Fe) MOF exhibits a wide working pH range (pH 3.0-11.0), temperature tolerance, and good recyclability for MB removal. Under the optimal conditions, complete removal of MB was achieved within 45 min. In addition, removal of MB was above 80% after five cycles, showing the good recyclability of NH 2 -MIL-88B(Fe). The NH 2 -MIL-88B(Fe) MOF has the features of easy preparation, high efficiency, and good recyclability for MB removal in a wide pH range. Electron spin resonance and fluorescence probe results suggest the involvement of hydroxyl radicals in MB degradation. These findings provide new insight into the application of high-efficient MOF-based Fenton-like catalysts for water purification.

  11. Performance of metal-organic framework MIL-101 after surfactant modification in the extraction of endocrine disrupting chemicals from environmental water samples.

    Science.gov (United States)

    Huang, Zhenzhen; Lee, Hian Kee

    2015-10-01

    The research presented in this paper explored the modification and application of a metal-organic framework, MIL-101, with nonionic surfactant-Triton X-114 in dispersive solid-phase extraction for the preconcentration of four endocrine disrupting chemicals (estrone, 17α-ethynylestradiol, estriol and diethylstilbestrol) from environmental water samples. Triton X-114 molecules could be adsorbed by the hydrophobic surface of the MIL-101 crystals, and thus improved the dispersibility of MIL-101 in aqueous solution by serving as a hydrophilic coating. Cloud point phase separation from Triton X-114 accelerated the separation of extracts from the aqueous matrix. The proposed method combines the favorable attributes of strong adsorption capacity resulting from the porous structure of MIL-101 and self-assembly of Triton X-114 molecules. Post-extraction derivatization using N-methyl-N-(trimethylsilyl)trifluoroacetamide was employed to facilitate the quantitative determination of the extracts by gas chromatography-mass spectrometry. The main factors affecting the preparation of modified MIL-101, and extraction of the analytes, such as the amount of surfactant, the ultrasonic and vortex durations, solution pH and desorption conditions, were investigated in detail. Under the optimized conditions, the present method yielded low limits of detection (0.006-0.023 ng/mL), good linearity from 0.09 to 45 ng/mL (coefficients of determination higher than 0.9980) and acceptable precision (relative standard deviations of 2.2-13%). The surface modified MIL-101 was demonstrated to be effective for the extraction of the selected estrogens from aqueous samples, giving rise to markedly improved extraction performance compared to the unmodified MIL-101. Copyright © 2015 Elsevier B.V. All rights reserved.

  12. Amine-functionalized MIL-53(Al)-coated stainless steel fiber for efficient solid-phase microextraction of synthetic musks and organochlorine pesticides in water samples.

    Science.gov (United States)

    Xie, Lijun; Liu, Shuqin; Han, Zhubing; Jiang, Ruifen; Zhu, Fang; Xu, Weiqin; Su, Chengyong; Ouyang, Gangfeng

    2017-09-01

    The fiber coating is the key part of the solid-phase microextraction (SPME) technique, and it determines the sensitivity, selectivity, and repeatability of the analytical method. In this work, amine (NH 2 )-functionalized material of Institute Lavoisier (MIL)-53(Al) nanoparticles were successfully synthesized, characterized, and applied as the SPME fiber coating for efficient sample pretreatment owing to their unique structures and excellent adsorption properties. Under optimized conditions, the NH 2 -MIL-53(Al)-coated fiber showed good precision, low limits of detection (LODs) [0.025-0.83 ng L -1 for synthetic musks (SMs) and 0.051-0.97 ng L -1 for organochlorine pesticides (OCPs)], and good linearity. Experimental results showed that the NH 2 -MIL-53(Al) SPME coating was solvent resistant and thermostable. In addition, the extraction efficiencies of the NH 2 -MIL-53(Al) coating for SMs and OCPs were higher than those of commercially available SPME fiber coatings such as polydimethylsiloxane, polydimethylsiloxane-divinylbenzene, and polyacrylate. The reasons may be that the analytes are adsorbed on NH 2 -MIL-53(Al) primarily through π-π interactions, electron donor-electron acceptor interactions, and hydrogen bonds between the analytes and organic linkers of the material. Direct immersion (DI) SPME-gas chromatography-mass spectrometry methods based on NH 2 -MIL-53(Al) were successfully applied for the analysis of tap and river water samples. The recoveries were 80.3-115% for SMs and 77.4-117% for OCPs. These results indicate that the NH 2 -MIL-53(Al) coating may be a promising alternative to SPME coatings for the enrichment of SMs and OCPs.

  13. Ship-in-a-bottle CMPO in MIL-101(Cr) for selective uranium recovery from aqueous streams through adsorption.

    Science.gov (United States)

    De Decker, Jeroen; Folens, Karel; De Clercq, Jeriffa; Meledina, Maria; Van Tendeloo, Gustaaf; Du Laing, Gijs; Van Der Voort, Pascal

    2017-08-05

    Mesoporous MIL-101(Cr) is used as host for a ship-in-a-bottle type adsorbent for selective U(VI) recovery from aqueous environments. The acid-resistant cage-type MOF is built in-situ around N,N-Diisobutyl-2-(octylphenylphosphoryl)acetamide (CMPO), a sterically demanding ligand with high U(VI) affinity. This one-step procedure yields an adsorbent which is an ideal compromise between homogeneous and heterogeneous systems, where the ligand can act freely within the pores of MIL-101, without leaching, while the adsorbent is easy separable and reusable. The adsorbent was characterized by XRD, FTIR spectroscopy, nitrogen adsorption, XRF, ADF-STEM and EDX, to confirm and quantify the successful encapsulation of the CMPO in MIL-101, and the preservation of the host. Adsorption experiments with a central focus on U(VI) recovery were performed. Very high selectivity for U(VI) was observed, while competitive metal adsorption (rare earths, transition metals...) was almost negligible. The adsorption capacity was calculated at 5.32mg U/g (pH 3) and 27.99mg U/g (pH 4), by fitting equilibrium data to the Langmuir model. Adsorption kinetics correlated to the pseudo-second-order model, where more than 95% of maximum uptake is achieved within 375min. The adsorbed U(VI) is easily recovered by desorption in 0.1M HNO 3 . Three adsorption/desorption cycles were performed. Copyright © 2017 Elsevier B.V. All rights reserved.

  14. Fitodefensivos em plantas medicinais: macromoléculas hidrofílicas de folhas de mil folhas (Achillea millefolium L. inibem o crescimento in vitro de bactérias fitopatogênicas Agrochemicals in medicinal plants: hydrophilic macromolecules from leaves of "mil folhas" (Achillea millefolium L. inhibit in vitro growth of phytopathogenic bacteria

    Directory of Open Access Journals (Sweden)

    N.G. Tessarollo

    2013-01-01

    minimum inhibitory concentration (MIC for both extracts and both bacteria were low, ranging from 20 to 80µM. The MIC relative to total protein evidenced the presence of very active macromolecules in E3, although showing low protein concentration. E3 applies to the prospection of antimicrobial peptides. The estimated MIC relative to the amount of plant sample valued the natural antimicrobial potential of E1, which contains high protein concentration. E1 and E3 can be used in the development of agrochemicals for biotechnological purposes. The ultrafiltration procedure fractionated the samples in a rapid and native way and at a low cost; it also desalted, clarified, concentrated and purified both E1 and E3. This pioneering study on the separomics and on the antimicrobial activity of macromolecular aqueous extracts from "mil folhas" suggests that healing plants have great potential to develop non-harmful agricultural natural agrochemicals, similarly to the available phytotherapic drugs.

  15. DEVELOPMENT OF A WELDING PROCEDURE FOR MIL A 46100 ARMOR STEEL JOINTS USING GAS METAL ARC WELDING

    OpenAIRE

    DAVID MAZUERA ROBLEDO; JOHN ALBERTO SUÁREZ GÓMEZ; JORGE ENRIQUE GIRALDO BARRADA

    2011-01-01

    Se desarrolló un procedimiento de soldadura (WPS) para unir láminas de acero para blindaje bajo especificación MIL A46100 usando el proceso GMAW, el cual fue calificado mediante ensayos mecánicos y no destructivos (NDT) de acuerdo con los requerimientos de códigos militares. Los resultados obtenidos fueron comparados con procedimientos de soldadura para este material realizados con el proceso SMAW. Los resultados obtenidos mostraron que el WPS diseñado es una opción viable para la soldadura d...

  16. As mulheres em sua família: Mesopotâmia, 2º milênio a.C.

    Directory of Open Access Journals (Sweden)

    Brigitte Lion

    2005-12-01

    Full Text Available As fontes cuneiformes do 2º milênio a.C. fornecem uma abundante documentação sobre as mulheres mesopotâmicas. A partir dos códigos de leis e de numerosos arquivos privados, é possível reconstituir a vida das mulheres comuns em seu quadro familiar. Este artigo analisa a condição feminina através dos diferentes costumes matrimoniais, da situação econômica das mulheres, bem como de suas atividades no interior do lar.

  17. Multiple Nebular Gas Reservoirs Recorded by Oxygen Isotope Variation in a Spinel-rich CAI in CO3 MIL 090019

    Science.gov (United States)

    Simon, J. I.; Simon, S. B.; Nguyen, A. N.; Ross, D. K.; Messenger, S.

    2017-01-01

    We conducted NanoSIMS O-isotopic imaging of a primitive spinel-rich CAI spherule (27-2) from the MIL 090019 CO3 chondrite. Inclusions such as 27-2 are proposed to record inner nebula processes during an epoch of rapid solar nebula evolution. Mineralogical and textural analyses suggest that this CAI formed by high temperature reactions, partial melting, and condensation. This CAI exhibits radial O-isotopic heterogeneity among multiple occurrences of the same mineral, reflecting interactions with distinct nebular O-isotopic reservoirs.

  18. Mise en place d'une collection de ressources génétiques du mil ...

    African Journals Online (AJOL)

    Le mil est une céréale importante pour l'alimentation humaine. La Côte d'Ivoire représente un des centres de production et de consommation. Afin de collecter, conserver et étudier les variabilités existantes, une seconde mission a été effectuée dans les zones de culture de cette céréale en 1989 et 1990, faisant suite à la ...

  19. Smooth and rapid microwave synthesis of MIL-53(Fe) including superparamagnetic γ-Fe2O3 nanoparticles

    Science.gov (United States)

    Wengert, Simon; Albrecht, Joachim; Ruoss, Stephen; Stahl, Claudia; Schütz, Gisela; Schäfer, Ronald

    2017-12-01

    MIL-53(Fe) linked to superparamagnetic γ-Fe2O3 nanoparticles was created using time-efficient microwave synthesis. Intermediates as well as the final product have been characterized by Dynamic Light Scattering (DLS), Infrared Spectroscopy (FTIR) and Thermal Gravimetric Analysis (TGA). It is found that this route allows the production of Fe nanoparticles with typical sizes of about 80 nm that are embedded inside the metal-organic structures. Detailed magnetization measurements using SQUID magnetometry revealed a nearly reversible magnetization loop indicating essentially superparamagnetic behavior.

  20. Revisiting the Aluminum Trimesate-based MOF (MIL-96): from Structure Determination to the Processing of Mixed Matrix Membranes for CO2 Capture.

    KAUST Repository

    Benzaqui, Marvin; S. Pillai, Renjith; Sabetghadam, Anahid; Benoit, Virginie; Normand, Pé rine; Marrot, Jerome; Menguy, Nicolas; Montero, David; Shepard, William; Tissot, Antoine; Martineau-Corcos, Charlotte; Sicard, Clé mence; Mihaylov, Mihail; Carn, Florent; Beurroeis, Isabelle; Llewellyn, Philip L.; De Weireld, Guy; Hadjiivanov, Konstantin; Gascon, Jorge; Kapteijn, Freek; Maurin, Guillaume; Steunou, Nathalie; Serre, Christian

    2017-01-01

    A microporous Al trimesate-based metal-organic framework (MOF), denoted MIL-96-(Al), was selected as a porous hybrid filler for the processing of mixed matrix membranes (MMMs) for CO2/N-2 postcombustion separation. First, the structural model of MIL-96-(Al) initially reported was revisited using a combination of synchrotron-based single-crystal X-ray diffraction, solid-state nuclear magnetic resonance spectroscopy, and density functional theory (DFT) calculations. In a second step, pure MIL-96-(Al) crystals differing by their size and aspect ratio, including anisotropic hexagonal platelets and nanoparticles of about 70 nm in diameter, were prepared. Then, a combination of in situ IR spectroscopy, single-gas, and CO2/N-2 coadsorption experiments, calorimetry, and molecular simulations revealed that MIL-96-(Al) nanoparticles show a relatively high CO2 affinity over N-2 owing to strong interactions between CO2 molecules and several adsorption sites such as Al3+ Lewis centers, coordinated water, and hydroxyl groups. Finally, the high compatibility between MIL-96-(Al) nanoparticles and the 6FDA-DAM polymer allowed the processing of homogeneous and defect-free MMMs with a high MOF loading (up to 25 wt %) that outperform pure polymer membranes for CO2/N-2 separation.

  1. Self and transport diffusivity of CO2 in the metal-organic framework MIL-47(V) explored by quasi-elastic neutron scattering experiments and molecular dynamics simulations.

    Science.gov (United States)

    Salles, Fabrice; Jobic, Hervé; Devic, Thomas; Llewellyn, Philip L; Serre, Christian; Férey, Gérard; Maurin, Guillaume

    2010-01-26

    Quasi-elastic neutron scattering measurements are combined with molecular dynamics simulations to determine the self-diffusivity, corrected diffusivity, and transport diffusivity of CO(2) in the metal-organic framework MIL-47(V) (MIL = Materials Institut Lavoisier) over a wide range of loading. The force field used for describing the host/guest interactions is first validated on the thermodynamics of the MIL-47(V)/CO(2) system, prior to being transferred to the investigations of the dynamics. A decreasing profile is then deduced for D(s) and D(o) whereas D(t) presents a non monotonous evolution with a slight decrease at low loading followed by a sharp increase at higher loading. Such decrease of D(t) which has never been evidenced in any microporous systems comes from the atypical evolution of the thermodynamic correction factor that reaches values below 1 at low loading. This implies that, due to intermolecular interactions, the CO(2) molecules in MIL-47(V) do not behave like an ideal gas. Further, molecular simulations enabled us to elucidate unambiguously a 3D diffusion mechanism within the pores of MIL-47(V).

  2. Revisiting the Aluminum Trimesate-based MOF (MIL-96): from Structure Determination to the Processing of Mixed Matrix Membranes for CO2 Capture.

    KAUST Repository

    Benzaqui, Marvin

    2017-11-08

    A microporous Al trimesate-based metal-organic framework (MOF), denoted MIL-96-(Al), was selected as a porous hybrid filler for the processing of mixed matrix membranes (MMMs) for CO2/N-2 postcombustion separation. First, the structural model of MIL-96-(Al) initially reported was revisited using a combination of synchrotron-based single-crystal X-ray diffraction, solid-state nuclear magnetic resonance spectroscopy, and density functional theory (DFT) calculations. In a second step, pure MIL-96-(Al) crystals differing by their size and aspect ratio, including anisotropic hexagonal platelets and nanoparticles of about 70 nm in diameter, were prepared. Then, a combination of in situ IR spectroscopy, single-gas, and CO2/N-2 coadsorption experiments, calorimetry, and molecular simulations revealed that MIL-96-(Al) nanoparticles show a relatively high CO2 affinity over N-2 owing to strong interactions between CO2 molecules and several adsorption sites such as Al3+ Lewis centers, coordinated water, and hydroxyl groups. Finally, the high compatibility between MIL-96-(Al) nanoparticles and the 6FDA-DAM polymer allowed the processing of homogeneous and defect-free MMMs with a high MOF loading (up to 25 wt %) that outperform pure polymer membranes for CO2/N-2 separation.

  3. H5PV2Mo10O40 encapsulated in MIL-101(Cr): facile synthesis and characterization of rationally designed composite materials for efficient decontamination of sulfur mustard.

    Science.gov (United States)

    Li, Yanqin; Gao, Qi; Zhang, Lijuan; Zhou, Yunshan; Zhong, Yuxu; Ying, Ying; Zhang, Mingcai; Huang, Chunqian; Wang, Yong'an

    2018-04-24

    Currently extensive effort is compulsively expended to decontaminate efficiently banned chemical war agents. In this work, H5PV2Mo10O40 molecules have been encapsulated in mesoporous MIL-101(Cr), which features two types of mesoporous cages (internal diameters of 29 Å and 34 Å) and microporous windows (diameters of 12 Å and 16 Å), leading to the formation of a new composite H5PV2Mo10O40@MIL-101(Cr) through a simple impregnation method. The composite was characterized thoroughly by elemental analysis, FT-IR spectroscopy, powder X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy, TG/DTA, and textural analysis thereby confirming the encapsulation of the H5PV2Mo10O40 into MIL-101(Cr). The decontamination efficiency of sulfur mustard (4 μL HD in 40 μL of petroleum ether) by 20 mg of the composite is found to be 97.39% in 120 min under ambient conditions. GC-MS analysis on the decontaminated products using 2-chloroethyl ethyl sulfide (CEES), which has been widely used as a simulant of sulfur mustard, showed that MIL-101(Cr) just decontaminates CEES by adsorption, while CEES can be decontaminated under ambient conditions by a synergetic combination of adsorption of MIL-101(Cr) and subsequent chemical oxidation degradation to nontoxic 2-chloroethyl ethyl sulfoxide (CEESO) due to the presence of highly dispersed H5PV2Mo10O40 within the composites.

  4. MIL-125-NH2@TiO2 Core-Shell Particles Produced by a Post-Solvothermal Route for High-Performance Photocatalytic H2 Production.

    Science.gov (United States)

    Zhang, Bingxing; Zhang, Jianling; Tan, Xiuniang; Shao, Dan; Shi, Jinbiao; Zheng, Lirong; Zhang, Jing; Yang, Guanying; Han, Buxing

    2018-05-02

    Metal-organic frameworks (MOFs) have proven to be an interesting class of sacrificial precursors of functional inorganic materials for catalysis, energy storage, and conversion applications. However, the controlled synthesis of MOF-derived materials with desirable compositions, structures, and properties still remains a big challenge. Herein, we propose a post-solvothermal route for the outer-to-inner loss of organic linkers from MOF, which is simple, rapid, and controllable and can be operated at temperature much lower than that of the commonly adopted pyrolysis method. By such a strategy, the MIL-125-NH 2 particles coated by TiO 2 nanosheets were produced, and the thickness of TiO 2 shell can be easily tuned. The MIL-125-NH 2 @TiO 2 core-shell particles combine the advantages of highly active TiO 2 nanosheets, MIL-125-NH 2 photosensitizer, plenty of linker defects and oxygen vacancies, and mesoporous structure, which allows them to be utilized as photocatalysts for the visible-light-driven hydrogen production reaction. It is remarkable that the hydrogen evolution rate by MIL-125-NH 2 @TiO 2 can be enhanced 70 times compared with the pristine MIL-125-NH 2 . Such a route can be easily applied to the synthesis of different kinds of MOF-derived functional materials.

  5. Construcción de un anfiteatro subterráneo de mil plazas

    Directory of Open Access Journals (Sweden)

    Hereng, J. M.

    1963-02-01

    Full Text Available The Arts and Crafts School of Paris was in need of an auditorium, with accommodation for one thousand persons, suitable for lessons and lectures. Owing to lack of space, it was decided to build it underground, below one of the courtyards. The choice of roof shape was an ellipsoid of revolution, whose major axis is inclined to the horizontal. The maximum diameter is 32 ms and maximum height is 10 ms. The thickness of the roof structure is 50 cms along the lower part, and 20 cms near the crown. This solution was of special interest as it overcame simultaneously two difficulties; namely, the foundation, when this has to be based on fill soil, and the non-interference with the illumination of nearby buildings. In this case the loading on the soil is always less than 380 grams per cm-, even assuming a local settlement of the soil over any area of 20 ms in diameter. Concrete has been transported to the required sites by means of compressed air chutes, with the result that the rate of concreting has not been interfered with. Formwork has been carefully thought out, especially over the zones where the floor surface changes into the auditorium vault. The tubular structure supporting the formwork of the vault has been erected with columns which are normal to the inclined diametral plane of the surface of revolution. Owing to this unusual arrangement, the staff working at the site have often lost their sense of balance.El Conservatorio de Artes y Oficios de París necesitaba un anfiteatro capaz para mil plazas, utilizable para clases y conferencias. Por falta de espacio se decidió construirlo subterráneo en uno de los patios. La solución adoptada fue la de un elipsoide de revolución de eje mayor inclinado respecto de la horizontal con 32 m de diámetro y 10 de altura máxima; el espesor en la parte inferior es de 50 cm y en la superior de 20 centímetros. Esta solución es de particular interés, ya que solventaba de una vez dos problemas: el de

  6. Interaction of methanol with the flexible metal-organic framework MIL-53(Fe) observed by inelastic neutron scattering

    International Nuclear Information System (INIS)

    Munn, Alexis S.; Ramirez-Cuesta, Anibal J.; Millange, Franck; Walton, Richard I.

    2013-01-01

    Highlights: • A spectroscopic signature of guest-induced swelling of a flexible MOF has been identified. • Librations of the linker contribute to pore opening of the MOF structure. • Complementary in situ powder XRD shows changes in long-range order during guest uptake. - Abstract: In situ powder X-ray diffraction and thermogravimetry show that the iron(III) carboxylate material MIL-53(Fe) expands in two steps upon exposure to methanol vapour to give a ‘half open’ phase and then a fully expanded structure; these correspond to the uptake of one and two molar equivalents of methanol, respectively. This knowledge allows interpretation of inelastic neutron scattering (INS) spectra, measured using TOSCA at ISIS, of the solid loaded with various amounts of water, methanol or d3-methanol (CD 3 OH), aided also by DFT simulation of INS spectra of the analogous MIL-53(Al) structure. The key signature of the expansion and contraction of the structure is the shift of bands in the 400 cm −1 region: these are assigned as due to the librations of the terephthalate rings, involving motions that result in distortion of the aromatic ring and a rocking motion of the aromatic ring about the bonds to the carboxylate groups

  7. DEVELOPMENT OF A WELDING PROCEDURE FOR MIL A 46100 ARMOR STEEL JOINTS USING GAS METAL ARC WELDING

    Directory of Open Access Journals (Sweden)

    DAVID MAZUERA ROBLEDO

    2011-01-01

    Full Text Available Se desarrolló un procedimiento de soldadura (WPS para unir láminas de acero para blindaje bajo especificación MIL A46100 usando el proceso GMAW, el cual fue calificado mediante ensayos mecánicos y no destructivos (NDT de acuerdo con los requerimientos de códigos militares. Los resultados obtenidos fueron comparados con procedimientos de soldadura para este material realizados con el proceso SMAW. Los resultados obtenidos mostraron que el WPS diseñado es una opción viable para la soldadura de blindajes de acero MIL A 46100. Además, con el WPS diseñado se obtuvo una reducción en el ancho de la zona afectada térmicamente (ZAT que debería conducir a un mejor desempeño en servicio de los blindajes de acuerdo con los resultados de estudios previos. Finalmente, se encontró un incremento en la energía absorbida en los ensayos de impacto Charpy V comparada con la de soldaduras realizadas con el proceso SMAW.

  8. Poverty and the Millennium Development Goals Pobreza e Metas de Desenvolvimento para o Milênio

    Directory of Open Access Journals (Sweden)

    G. J. Ebrahim

    2007-12-01

    apresentada como um desafio para muitos países em desenvolvimento. Em um ambiente físico de privação se desenvolve a cultura da pobreza com sua prevalência de doença, desagregação social, violência dentro e fora dos lares e dependência de álcool e drogas. No meio urbano pobre a inserção no comportamento de risco é comum. As principais vítimas de privações são as mulheres, as crianças, os idosos e os fracos. Evidências mostram os efeitos deletérios de a criança crescer em meio à pobreza. Ação corretiva consiste em uma tarefa árdua, cara e nem sempre bem sucedida. O despertar da consciência social global provocado pela dura realidade do pobre urbano vivendo lado a lado em íntimo contato com o consumo opulento e evidente tem persuadido líderes mundiais e economistas a mobilizar a opinião pública. Um encontro de lideres mundiais ocorrido nas Nações Unidas, no ano 2000, propôs e acordou Metas de Desenvolvimento para o Milênio. As metas são dirigidas não apenas para a pobreza per se mas também os seus efeitos. A data limite para a conquista das metas de desenvolvimento do milênio foi estabelecida para o ano 2015. Os progressos em torno dessas metas têm sido toscos e dependem da maturidade política nacional.

  9. Dye-sensitized MIL-101 metal organic frameworks loaded with Ni/NiO{sub x} nanoparticles for efficient visible-light-driven hydrogen generation

    Energy Technology Data Exchange (ETDEWEB)

    Liu, Xin-Ling; Wang, Rong; Yuan, Yu-Peng, E-mail: yupengyuan@ahu.edu.cn, E-mail: cxue@ntu.edu.sg [School of Chemistry and Chemical Engineering, and Innovation Lab for Clean Energy and Green Catalysis, Anhui University, Hefei 230036 (China); Zhang, Ming-Yi [Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025 (China); Xue, Can, E-mail: yupengyuan@ahu.edu.cn, E-mail: cxue@ntu.edu.sg [Solar Fuels Lab, School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 (Singapore)

    2015-10-01

    The Ni/NiO{sub x} particles were in situ photodeposited on MIL-101 metal organic frameworks as catalysts for boosting H{sub 2} generation from Erythrosin B dye sensitization under visible-light irradiation. The highest H{sub 2} production rate of 125 μmol h{sup −1} was achieved from the system containing 5 wt. % Ni-loaded MIL-101 (20 mg) and 30 mg Erythrosin B dye. Moreover, the Ni/NiO{sub x} catalysts show excellent stability for long-term photocatalytic reaction. The enhancement on H{sub 2} generation is attributed to the efficient charge transfer from photoexcited dye to the Ni catalyst via MIL-101. Our results demonstrate that the economical Ni/NiO{sub x} particles are durable and active catalysts for photocatalytic H{sub 2} generation.

  10. Dye-sensitized MIL-101 metal organic frameworks loaded with Ni/NiOx nanoparticles for efficient visible-light-driven hydrogen generation

    Directory of Open Access Journals (Sweden)

    Xin-Ling Liu

    2015-10-01

    Full Text Available The Ni/NiOx particles were in situ photodeposited on MIL-101 metal organic frameworks as catalysts for boosting H2 generation from Erythrosin B dye sensitization under visible-light irradiation. The highest H2 production rate of 125 μmol h−1 was achieved from the system containing 5 wt. % Ni-loaded MIL-101 (20 mg and 30 mg Erythrosin B dye. Moreover, the Ni/NiOx catalysts show excellent stability for long-term photocatalytic reaction. The enhancement on H2 generation is attributed to the efficient charge transfer from photoexcited dye to the Ni catalyst via MIL-101. Our results demonstrate that the economical Ni/NiOx particles are durable and active catalysts for photocatalytic H2 generation.

  11. Effect of Amine-Functionalized MIL-53 Metal Organic Frameworks on the Performance of Poly(4-methyl-1-pentyne Membrane in CO2/CH4 Separation Gas Mixture

    Directory of Open Access Journals (Sweden)

    Reza Abedini

    2015-06-01

    Full Text Available The effect of NH2-MIL 53 metal organic framework (MOF on gas transport properties of poly(4-methyl-1-pentyne (PMP was investigated. Various characterization methods such as FTIR, DSC, SEM and gas adsorption test as well as a series of CO2/CH4 gas separation tests (i.e., pure and mixed gas test were conducted in order to determine the effect of ligand functionalization (–NH2 on the properties of the prepared mixed matrix membranes and their gas transport characteristics. The results of DSC showed that glass transition temperature (Tg increased by increasing NH2-MIL 53 loading. The SEM images also demonstrated that the NH2-MIL 53 particles were dispersed well in the PMP matrix with no noticeable agglomeration. The gas adsorption test of NH2-MIL 53 particles revealed there was a selective adsorption behavior with respect to CO2. It was also found that, incorporation of NH2-MIL 53 into the PMP resulted in an increase in gas permeability (especially towards CO2 and a higher CO2/CH4 selectivity. Adding 30 wt% NH2-MIL 53 into the polymer matrix increased CO2 permeability and CO2/CH4 selectivity of the mixed gas from 83.35 to 210.21 barrer and 7.61 to 19.88, respectively. Rising the temperature from 30 to 60°C led to the permeability increment of both CO2 and CH4 in the mixed gas test, while the CO2/CH4 selectivity decreased. Moreover, the results showed that amino groups required no regeneration and their performance did not decline during 120 h of permeation test. A comparison between the permeation data and those calculated from permeation models revealed that the Bruggeman model could fit the CO2 permeability data better than the Maxwell and Lewis models.

  12. High performance liquid chromatography of substituted aromatics with the metal-organic framework MIL-100(Fe): Mechanism analysis and model-based prediction.

    Science.gov (United States)

    Qin, Weiwei; Silvestre, Martin Eduardo; Li, Yongli; Franzreb, Matthias

    2016-02-05

    Metal-organic framework (MOF) MIL-100(Fe) with well-defined thickness was homogenously coated onto the outer surface of magnetic microparticles via a liquid-phase epitaxy method. The as-synthesized MIL-100(Fe) was used as stationary phase for high-performance liquid chromatography (HPLC) and separations of two groups of mixed aromatic hydrocarbons (toluene, styrene and p-xylene; acetanilide, 2-nirtoaniline and 1-naphthylamine) using methanol/water as mobile phase were performed to evaluate its performance. Increasing water content of the mobile phase composition can greatly improve the separations on the expense of a longer elution time. Stepwise elution significantly shortens the elution time of acetanilide, 2-nirtoaniline and 1-naphthylamine mixtures, while still achieving a baseline separation. Combining the experimental results and in-depth modeling using a recently developed chromatographic software (ChromX), adsorption equilibrium parameters, including the affinities and maximum capacities, for each analyte toward the MIL-100(Fe) are obtained. In addition, the pore diffusivity of aromatic hydrocarbons within MIL-100(Fe) was determined to be 5×10(-12)m(2)s(-1). While the affinities of MIL-100(Fe) toward the analyte molecules differs much, the maximum capacities of the analytes are in a narrow range with q*MOFmax,toluene=3.55molL(-1), q*MOFmax,styrene or p-xylene=3.53molL(-1), and q*MOFmax,anilines=3.12molL(-1) corresponding to approximately 842 toluene and 838 styrene or p-xylene, and 740 aniline molecules per MIL-100(Fe) unit cell, respectively. Copyright © 2016 Elsevier B.V. All rights reserved.

  13. Photoelectrochemical detection of the herbicide clethodim by using the modified metal-organic framework amino-MIL-125(Ti)/TiO2

    International Nuclear Information System (INIS)

    Jin, Dangqin; Yu, Liangyun; Xu, Qin; Hu, Xiaoya

    2015-01-01

    We describe a sensitive photoelectrochemical (PEC) sensor for the determination of the herbicide clethodim. The PEC sensor was constructed by using amino-MIL-125/TiO 2 (MIL stands for Materials from Institute Lavoisier), an amino-functionalized metal-organic framework (MOF) modified with TiO2. The amino-MIL-125/TiO 2 was synthesized by a simple one-step solvothermal method and placed on a glassy carbon electrode where it displays photoelectrocatalytic activity. Scanning electron microscopy (SEM), Fourier-transform infrared (FTIR) spectroscopy and X-ray diffractometry (XRD) were used to characterize the amino-MIL-125/TiO2. In the sensing process, amino-MIL-125/TiO 2 is illuminated by visible light to produce electrons. These excited electrons are delivered to the glassy carbon electrode, leaving positively charged holes (h+) on the surface of the amino-MIL-125/TiO 2 . The holes react with H 2 O to generate hydroxy radicals (•OH). Clethodim rapidly attacks the hydroxy radicals and improves the efficiency of charge separation, this leading to an enhanced photocurrent. Under the optimal experimental conditions, this photoelectrochemical method enables clethodim to be quantified in the concentration range from 0.2 to 25 μmol L −1 , with a detection limit (3 S/N) of 10 nmol L −1 . The assay was applied to the determination of clethodim in soil samples, and results were in acceptable agreement with data obtained by liquid chromatography/mass spectrometry. (author)

  14. Validation of MIL-F-9490D. General Specification for Flight Control System for Piloted Military Aircraft. Volume III. C-5A Heavy Logistics Transport Validation

    Science.gov (United States)

    1977-04-01

    subjected to extreme environmental climatic tests, including the IdL,-T-5289 test requirement. 5.1.9.2 Invulnerability to Lightning Strikes and Static...specified in Paragraph 3.2.3.2.1. The hydi aulic computing elements were designed to the requirements of MIL-C- 5503 and �-H-8775. I 297 L...and climate in any area of the world using MI,- STD-210, FAA-T3O-(49C, and MIL-F-9490, as applicable. Environmental areas included solar radiation

  15. Propuesta de una planificación estratégica e indicadores de desempeño para la empresa Talleres Mil Usos

    OpenAIRE

    Gómez Zhiminaicela, Johanna Elizabeth; Redrován Reyes, Mayra Elizabeth

    2014-01-01

    En el presente trabajo se realizó una propuesta de Planificación Estratégica y medidores de desempeño para la empresa Talleres Mil Usos, se analizó los diferentes parámetros de la Planificación Estratégica y su importancia dentro de las organizaciones, también se planteó objetivos, estrategias e indicadores desempeño para verificar su desempeño laboral. In this work was carried out a Strategic Planning proposal and performance mediators for the company Talleres Mil Usos, looking at differe...

  16. Post-modified acid-base bifunctional MIL-101(Cr) for one-pot deacetalization-Knoevenagel reaction

    Energy Technology Data Exchange (ETDEWEB)

    Mu, Manman [Tianjin University, School of Science (China); Yan, Xilong; Li, Yang; Chen, Ligong, E-mail: lgchen@tju.edu.cn [Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) (China)

    2017-04-15

    A novel and convenient approach for the construction of the bifunctional MIL-101 material bearing sulfonic acid and amino groups was established via the post-synthetic modification. This material possesses high BET surface area (1446 m{sup 2}/g) and large pore volume (0.77 cm{sup 3}/g). Significantly, this material could serve as a bifunctional heterogeneous catalyst and was initially employed for one-pot deacetalization-Knoevenagel reaction, exhibiting excellent catalytic performance (yield 99.74%). More importantly, it can be easily recovered and reused at least three times. Finally, our proposed catalytic mechanism indicated that amino and the sulfonic acid groups played a synergistic effect on this one-pot deacetalization-Knoevenagel reaction.

  17. Superior Activity of Isomorphously Substituted MOFs with MIL-100(M=Al, Cr, Fe, In, Sc, V) Structure in the Prins Reaction: Impact of Metal Type

    Czech Academy of Sciences Publication Activity Database

    Gómez-Pozuelo, G.; Cabello, C. P.; Opanasenko, Maksym; Horáček, Michal; Čejka, Jiří

    2017-01-01

    Roč. 82, č. 1 (2017), s. 152-159 ISSN 2192-6506 R&D Projects: GA ČR GA14-07101S Institutional support: RVO:61388955 Keywords : impregnated mcm-41 catalyst * organic frameworks mil-100 * solid acid catalyst Subject RIV: CF - Physical ; Theoretical Chemistry OBOR OECD: Physical chemistry Impact factor: 2.797, year: 2016

  18. Chitosan capped nanoscale Fe-MIL-88B-NH2 metal-organic framework as drug carrier material for the pH responsive delivery of doxorubicin

    Science.gov (United States)

    Sivakumar, P.; Priyatharshni, S.; Nagashanmugam, K. B.; Thanigaivelan, A.; Kumar, K.

    2017-08-01

    In recent years nanoscale metal-organic frameworks (NMOFs) are contributing as an effective material for use in drug delivery and imaging applications due to their porous surfaces and easy surface modifications. In this work, Fe-MIL-88B-NH2 NMOFs were successfully synthesized on facile hydrothermal route and 2-aminoterephthalic acid (NH2-BDC) was employed as a bridging ligand to activate amine functional groups on the surface. Amine functional groups not only serve as a structure stabilizing agent but also enhance the loading efficiency of the doxorubicin (DOX) anticancer drug. A pH responsive DOX release was realized by introducing a positively charged chitosan (Chi) capping layer. Upon Chi-coating, cleavage was observed in the Fe-MIL-88B-NH2 structure at acidic pH, while gel-like insoluble structure was formed at basic pH. By utilizing this phenomenon, a pH responsive DOX release system was developed by using Chi capped Fe-MIL-88B-NH2 NMOFs under the designed pH (4.0-8.0). The results suggest the Chi capped Fe-MIL-88B-NH2 can be a promising candidate for future pH responsive drug delivery systems.

  19. Preparation of MIL-53(Fe)-Reduced Graphene Oxide Nanocomposites by a Simple Self-Assembly Strategy for Increasing Interfacial Contact: Efficient Visible-Light Photocatalysts.

    Science.gov (United States)

    Liang, Ruowen; Shen, Lijuan; Jing, Fenfen; Qin, Na; Wu, Ling

    2015-05-13

    In this work, MIL-53(Fe)-reduced graphene oxide (M53-RGO) nanocomposites have been successfully fabricated by a facile and efficient electrostatic self-assembly strategy for improving the interfacial contact between RGO and the MIL-53(Fe). Compared with D-M53-RGO (direct synthesis of MIL-53(Fe)-reduced graphene oxide nanocomposites via one-pot solvothermal approach), M53-RGO nanocomposites exhibit improved photocatalytic activity compared with the D-M53-RGO under identical experimental conditions. After 80 min of visible light illumination (λ ≥ 420 nm), the reduction ratio of Cr(VI) is rapidly increased to 100%, which is also higher than that of reference sample (N-doped TiO2). More significantly, the M53-RGO nanocomposites are proven to perform as bifunctional photocatalysts with considerable activity in the mixed systems (Cr(VI)/dyes) under visible light, which made it a potential candidate for industrial wastewater treatment. Combining with photoelectrochemical analyses, it could be revealed that the introduction of RGO would minimize the recombination of photogenerated electron-hole pairs. Additionally, the effective interfacial contact between MIL-53(Fe) and RGO surface would further accelerate the transfer of photogenerated electrons, leading to the enhancement of photocatalytic activity of M53-RGO toward photocatalytic reactions. Finally, a possible photocatalytic reaction mechanism is also investigated in detail.

  20. Effects of ductile phase volume fraction on the mechanical properties of Ti-Al3Ti metal-intermetallic laminate (MIL) composites

    International Nuclear Information System (INIS)

    Price, Richard D.; Jiang Fengchun; Kulin, Robb M.; Vecchio, Kenneth S.

    2011-01-01

    Research highlights: → Residual Al improves the mechanical properties of Ti-Al 3 Ti MIL composites. → Residual Al can eliminate intermetallic centerline delaminations in MILs. → Low levels of residual Al increase fracture toughness in MIL composites. → MIL stiffness, strength, and fracture toughness can be optimized at low Al levels. - Abstract: Metal-intermetallic laminate (MIL) composites consisting of alternating layers of Ti, Al, and the intermetallic Al 3 Ti have been fabricated by reactive foil sintering in open air. Six initially identical stacks of alternating Ti-3Al-2.5 V and 1100-Al foils were processed for different lengths of time, yielding specimens with different metal and intermetallic volume fractions. Their mechanical properties have been investigated with an emphasis on the effect of residual Al at the intermetallic centerline on composite strength and fracture toughness, as well as fracture and failure modes. Samples were cut from each composite plate (in layer orientations parallel and perpendicular to the intended load direction) for mechanical testing in compression and four-point bending under quasi-static and high-rate loading conditions. Examination of the damaged specimens and their fracture surfaces by optical and scanning electron microscopy was performed to establish a correlation between the failure mechanisms present, composite strength, and microstructure. Results indicated that regardless of loading direction, cracks always initiated in the intermetallic region, rarely at the centerline, and crack propagation and failure were heavily influenced by the thickness of the residual aluminum layers. There is an ideal residual aluminum volume fraction that represents the amount of ductile reinforcement that maximizes the combined properties of strength, toughness and stiffness.

  1. Atributos químicos e físicos de um argissolo cultivado com Panicum maximum Jacq. cv. IPR-86 Milênio, sob lotação rotacionada e adubado com nitrogênio Chemical and physical attributes in an anfisol cultivated with Panicum maximum Jacq. cv. IPR-86 Milênio, under rotational stocking and fertilized with nitrogen

    Directory of Open Access Journals (Sweden)

    Patrícia Sarmento

    2008-02-01

    Full Text Available A avaliação dos atributos químicos e físicos do solo é necessária em estudos que exploram intensivamente os sistemas de pastejo. No presente trabalho, objetivou-se avaliar as variações nos atributos físicos e químicos de um Argissolo cultivado com capim-milênio, sob pastejo, no intervalo compreendido entre outubro/2001 e maio/2002, no quinto ano de aplicação sucessiva das seguintes doses de N: 0, 150, 300 e 450 kg ha-1. Após os cinco anos de aplicação de 450 kg ha-1 de N, o teor de MO aumentou em 5 g dm-3, o que resultou em aumento da CTC. No período de outubro/2001 a maio/2002 houve diminuição nos valores de pH e de V com a aplicação de N. A densidade do solo variou pouco com a adubação nitrogenada; a percentagem de microporos aumentou e a de macroporos diminuiu na camada de 0-5 cm com o aumento das doses de N, mas a porosidade total permaneceu constante; e a resistência à penetração, quando o solo apresentava 90 g kg-1 de água, não foi afetada pelas doses de N e não foi restritiva ao crescimento das plantas.It is necessary to evaluate the soil physical and chemical attributes in studies that explore grazing systems intensively. In this work the variation in physical and chemical attributes of an Alfissol cultivated with Panicum maximum Jacq. cv. IPR-86 Milênio under grazing were evaluated from October 2001 to May 2002, in the fifth year of consecutive N application at rates of 0, 150, 300, and 450 kg ha-1. After five successive applications of 450 kg ha-1 N, the OM content increased 5 g dm-3, which resulted in CEC increase. From October 2001 to May 2002 the pH and basis saturation degree decreased with the increasing N rates. The range in soil density with N fertilization was small; the micropore percentage increased and the macropore percentage decreased in the 0-5 cm layer with increasing N rates, but the total porosity remained constant; and the soil penetration resistance at 90 g ha-1 of water was not

  2. Synthesis and structure determination of new open-framework chromium carboxylate MIL-105 or CrIII(OH).{O2C-C6(CH3)4-CO2}.nH2O

    International Nuclear Information System (INIS)

    Serre, Christian; Millange, Franck; Devic, Thomas; Audebrand, Nathalie; Van Beek, Wouter

    2006-01-01

    Two new three-dimensional chromium(III) dicarboxylate, MIL-105 or Cr III (OH).{O 2 C-C 6 (CH 3 ) 4 -CO 2 }.nH 2 O, have been obtained under hydrothermal conditions, and their structures solved using X-ray powder diffraction data. Both solids are structural analogs of the known Cr benzenedicarboxylate compound (MIL-53). Both contain trans corner-sharing CrO 4 (OH) 2 octahedral chains connected by tetramethylterephthalate di-anions. Each chain is linked by the ligands to four other chains to form a three-dimensional framework with an array of 1D pores channels. The pores of the high temperature form of the solid, MIL-105ht, are empty. However, MIL-105ht re-hydrates at room temperature to finally give MIL-105lt with pores channels filled with free water molecules (lt: low temperature form; ht: high temperature form). The thermal behaviour of the two solids has been investigated using TGA. Crystal data for MIL-105ht: monoclinic space group C2/c with a = 19.653(1) A, b = 9.984(1) A, c = 6.970(1) A, β = 110.67(1) o and Z = 4. Crystal data for MIL-105lt: orthorhombic space group Pnam with a = 17.892(1) A, b = 11.165(1) A, c = 6.916(1) A and Z = 4

  3. Martian fluid and Martian weathering signatures identified in Nakhla, NWA 998 and MIL 03346 by halogen and noble gas analysis

    Science.gov (United States)

    Cartwright, J. A.; Gilmour, J. D.; Burgess, R.

    2013-03-01

    We report argon (Ar) noble gas, Ar-Ar ages and halogen abundances (Cl, Br, I) of Martian nakhlites Nakhla, NWA 998 and MIL 03346 to determine the presence of Martian hydrous fluids and weathering products. Neutron-irradiated samples were either crushed and step-heated (Nakhla only), or simply step-heated using a laser or furnace, and analysed for noble gases using an extension of the 40Ar-39Ar technique to determine halogen abundances. The data obtained provide the first isotopic evidence for a trapped fluid that is Cl-rich, has a strong correlation with 40ArXS (40ArXS = 40Armeasured - 40Arradiogenic) and displays 40ArXS/36Ar of ˜1000 - consistent with the Martian atmosphere. This component was released predominantly in the low temperature and crush experiments, which may suggest a fluid inclusion host. For the halogens, we observe similar Br/Cl and I/Cl ratios between the nakhlites and terrestrial reservoirs, which is surprising given the absence of crustal recycling, organic matter and frequent fluid activity on Mars. In particular, Br/Cl ratios in our Nakhla samples (especially olivine) are consistent with previously analysed Martian weathering products, and both low temperature and crush analyses show a similar trend to the evaporation of seawater. This may indicate that surface brines play an important role on Mars and on halogen assemblages within Martian meteorites and rocks. Elevated I/Cl ratios in the low temperature NWA 998 and MIL 03346 releases may relate to in situ terrestrial contamination, though we are unable to distinguish between low temperature terrestrial or Martian components. Whilst estimates of the amount of water present based on the 36Ar concentrations are too high to be explained by a fluid component alone, they are consistent with a mixed-phase inclusion (gas and fluid) or with shock-implanted Martian atmospheric argon. The observed fluid is dilute (low salinity, but high Br/Cl and I/Cl ratios), contains a Martian atmospheric component

  4. Synthesis of highly efficient Mn2O3 catalysts for CO oxidation derived from Mn-MIL-100

    Science.gov (United States)

    Zhang, Xiaodong; Li, Hongxin; Hou, Fulin; Yang, Yang; Dong, Han; Liu, Ning; Wang, Yuxin; Cui, Lifeng

    2017-07-01

    In this work, metal-organic frameworks (MOFs) Mn-MIL-100 were first prepared, which were next used as templates to obtain the irregular porous Mn2O3 cubes through calcination with air at different temperature. The catalysts were characterized by N2 adsorption-desorption, X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), H2-temperature program reduction (H2-TPR) and X-ray photoelectron spectroscopic (XPS). The catalytic activity for CO oxidation over Mn2O3 catalysts was investigated. It was found that calcination temperature had a strong effect on the structure and catalytic activity of Mn2O3 catalyst. Mn2O3 catalyst obtained by calcined at 700 °C (Mn2O3-700) showed a smaller specific surface area, but displayed a high catalytic activity and excellent stability with a complete CO conversion temperature (T98) of 240 °C, which was attributed to the unique structure, a high quantity of surface active oxygen species, smaller particle size, oxygen vacancies and good low temperature reduction behavior. The effect of water vapor on catalytic activity was also examined. The introduction of water vapor to the feedstock induced a positive effect on CO oxidation over Mn2O3-700 catalyst. Furthermore, no obvious drop is observed in activity over catalysts even in the presence of water vapor during 48 h.

  5. Improved Gas Metal Arc Welding Multi-Physics Process Model and Its Application to MIL A46100 Armor-Grade Steel Butt-welds

    Science.gov (United States)

    2014-01-01

    decomposition during cooling is the so-called CCT (Continuous Cooling Transformation) diagram. In the case of CCT diagrams , the thermal histories...the start and the finish of the aforementioned phase transformations) are characterized by constant cooling rates. An example of the CCT diagram for...Ac1 Bs Fs Ff –0.01K/s1.6 K/s Figure 11. MIL A46100 continuous- cooling-transformation ( CCT ) diagram corresponding to the TTT diagram displayed in

  6. O terceiro milênio e o paradigma da informação 10.5007/1518-2924.1999v4n8p35

    Directory of Open Access Journals (Sweden)

    Edilene Vieira Scotti

    1999-01-01

    Full Text Available Reflexão sobre o papel da informação, do conhecimento e das tecnologias de informação na sociedade atual. Discorre sobre as relações da informação com o poder e com a sociedade. Aborda a Sociedade da Informação e os desafios profissionais no terceiro milênio.

  7. Salen- Zr(IV) complex grafted into amine-tagged MIL-101(Cr) as a robust multifunctional catalyst for biodiesel production and organic transformation reactions

    Science.gov (United States)

    Hassan, Hassan M. A.; Betiha, Mohamed A.; Mohamed, Shaimaa K.; El-Sharkawy, E. A.; Ahmed, Emad A.

    2017-08-01

    The synthesis of metal-organic frameworks (MOFs), porous coordination polymers with functional groups has received immense interest due to the functional groups can offer desirable properties and allow post-synthetic modification. Herein, for the first time, Zr(IV)-Sal Schiff base complex incorporated into amino-functionalized MIL-101(Cr) framework by salicylaldehyde condensing to amino group, and coordinating Zr(IV) ion have been successfully synthesized. The worthiness of the synthesized material as a catalyst has been examined for the esterification of oleic acid (free fatty acid) with methanol producing biodiesel (methyl oleate), Knoveonagel condensation reaction of aldehydes and Friedel-Crafts acylation of anisole. Our findings demonstrated that Salen-Zr(IV) grafted to framework of NH2-MIL-101(Cr) as a solid acid catalyst exhibited distinct catalytic performance for the production of biodiesel by esterification of oleic acid with methanol, Knoveonagel condensation and Friedel-Crafts acylation. These could be attributed to high surface area which allow high distribution of Zr(IV) species lead to a sufficient contact with the reactants species. Furthermore, the catalyst showed excellent recycling efficiency due to the strong interaction between the Zr(IV) ions and chelating groups in the NH2-MIL-101(Cr)-Sal.

  8. Facile Synthesis of Potassium Poly(heptazine imide) (PHIK)/Ti-Based Metal-Organic Framework (MIL-125-NH2) Composites for Photocatalytic Applications.

    Science.gov (United States)

    Rodríguez, Nicolás A; Savateev, Aleksandr; Grela, María A; Dontsova, Dariya

    2017-07-12

    Photocatalytically active composites comprising potassium poly(heptazine imide) (PHIK) and a Ti-based metal-organic framework (MOF, MIL-125-NH 2 ) are prepared in situ by simply dispersing both materials in water. The driving forces of composite formation are the electrostatic interactions between the solids and the diffusion of potassium ions from PHIK to MIL-125-NH 2 . This mechanism implies that other composites of poly(heptazine imide) salts and different MOFs bearing positive surface charge can potentially be obtained in a similar fashion. The suggested strategy thus opens a new avenue for the facile synthesis of such materials. The composites are shown to have a superior photocatalytic activity in Rhodamine B degradation under blue light irradiation. The reaction rate is doubled compared to that of pure MOF compound and is 7 times higher than the activity of the pristine PHIK. The results of the electron paramagnetic resonance (EPR) investigations and the analysis of the electronic structures of the solids suggest the electron transfer from MIL-125-NH 2 to PHIK in the composite. The possible pathways for the dye degradation and the rationalization of the increased activity of the composites are elaborated.

  9. Fe3O4 and metal-organic framework MIL-101(Fe) composites catalyze luminol chemiluminescence for sensitively sensing hydrogen peroxide and glucose.

    Science.gov (United States)

    Qian Tang, Xue; Dan Zhang, Yi; Wei Jiang, Zhong; Mei Wang, Dong; Zhi Huang, Cheng; Fang Li, Yuan

    2018-03-01

    In this work, Fe 3 O 4 and metal-organic framework MIL-101(Fe) composites (Fe 3 O 4 /MIL-101(Fe)) was demonstrated to possess excellent catalytic property to directly catalyze luminol chemiluminescence without extra oxidants. We utilized Fe 3 O 4 /MIL-101(Fe) to develop a ultra-sensitive quantitative analytical method for H 2 O 2 and glucose. The possible mechanism of the chemiluminescence reaction had been investigated. Under optimal conditions, the relative chemiluminescence intensity was linearly proportional to the logarithm of H 2 O 2 concentration in the range of 5-150nM with a limit of detection of 3.7nM (signal-to-noise ratio = 3), and glucose could be linearly detected in the range from 5 to 100nM and the detection limit was 4.9nM (signal-to-noise ratio = 3). Furthermore, the present approach was successfully applied to quantitative determination of H 2 O 2 in medical disinfectant and glucose in human serum samples. Copyright © 2017 Elsevier B.V. All rights reserved.

  10. Composite Monopack for 120mm Mortar, With Plastic Pallet Adapters on a 42" x 53" Wooden Pallet, MIL-STD-1660 Tests, "Design Criteria for Ammunition Unit Loads", and Extreme Temperature Tests

    National Research Council Canada - National Science Library

    Dugan, Jeffery L

    2005-01-01

    .... The test units were tested in accordance with the procedures set forth in MIL-STD-1660. Stacking, repetitive shock, edgewise-rotational drop, incline-impact, forklifting, and disassembly testing were conducted on the test units...

  11. Grate Pallet 8232 (GP-8232) Vehicle Pallet, Evaluation Tests MIL-STD-1660, "Design Criteria for Ammunition Unit Loads" and TP-94-01 (REV 1), "Transportability Testing Procedures"

    National Research Council Canada - National Science Library

    Barickman, Philip

    2003-01-01

    .... The testing was conducted for informational purposes only. The GP-8232 Vehicle Pallet was evaluated by the testing procedures set forth in MIL-STD-1660 and TP-94-01 (Rev. 1) testing procedures...

  12. Projectile, 155MM, XM982, Excalibur, Packed One (1) per PA179 Container, Unitized Up to Three (3) per 40 in. x 48 in. Wooden Pallet, MIL-STD-1660 Tests

    National Research Council Canada - National Science Library

    Dugan, Jeffery L

    2007-01-01

    The U.S. Army Defense Ammunition Center (DAC), Validation Engineering Division (SJMAC-DEV), conducted tests in accordance with MIL-STD-1660, "Design Criteria for Ammunition Unit Loads" on the XM982 155MM Excalibur Projectile packed one...

  13. Investigation of ball bond integrity for 0.8 mil (20 microns) diameter gold bonding wire on low k die in wire bonding technology

    Science.gov (United States)

    Kudtarkar, Santosh Anil

    Microelectronics technology has been undergoing continuous scaling to accommodate customer driven demand for smaller, faster and cheaper products. This demand has been satisfied by using novel materials, design techniques and processes. This results in challenges for the chip connection technology and also the package technology. The focus of this research endeavor was restricted to wire bond interconnect technology using gold bonding wires. Wire bond technology is often regarded as a simple first level interconnection technique. In reality, however, this is a complex process that requires a thorough understanding of the interactions between the design, material and process variables, and their impact on the reliability of the bond formed during this process. This research endeavor primarily focused on low diameter, 0.8 mil thick (20 mum) diameter gold bonding wire. Within the scope of this research, the integrity of the ball bond formed by 1.0 mil (25 mum) and 0.8 mil (20 mum) diameter wires was compared. This was followed by the evaluation of bonds formed on bond pads having doped SiO2 (low k) as underlying structures. In addition, the effect of varying the percentage of the wire dopant, palladium and bonding process parameters (bonding force, bond time, ultrasonic energy) for 0.8 mil (20 mum) bonding wire was also evaluated. Finally, a degradation empirical model was developed to understand the decrease in the wire strength. This research effort helped to develop a fundamental understanding of the various factors affecting the reliability of a ball bond from a design (low diameter bonding wire), material (low k and bonding wire dopants), and process (wire bonding process parameters) perspective for a first level interconnection technique, namely wire bonding. The significance of this research endeavor was the systematic investigation of the ball bonds formed using 0.8 mil (20 microm) gold bonding wire within the wire bonding arena. This research addressed low k

  14. The effect of water stress and salinity on growth and physiology of tomato (Lycopersicon esculentum Mil.

    Directory of Open Access Journals (Sweden)

    Giannakoula Anastasia E.

    2013-01-01

    Full Text Available Carotenoids like lycopene are important pigments found in photosynthetic pigment-protein complexes in plants. They are responsible for the bright colors of fruits and vegetables and perform various functions in photosynthesis. Our research has shown that the application of moderate salt stress on tomato plants can enhance lycopene and potentially other antioxidant concentrations in fruits. The increase in lycopene in response to salt stress in the tomato fruits varied from 20% to 80%. Although the specific biological mechanisms involved in increasing fruit lycopene deposition has not been clearly elucidated, evidence suggests that increasing antioxidant concentrations is a primary physiological response of the plant to salt stress. Additionally drought stress during cultivation increased the antioxidant capacity of tomato fruit while maintaining the lycopene concentration. In addition, the effects of silicium were investigated, added to the nutrient solution either at low concentration or at an increased concentration. The present study clearly indicates that an enhanced silicium supply to tomato increases markedly the lycopene contents, irrespective of the salinity status in the tomato fruit.

  15. Correlations in the (Sub)Mil1imeter Background from ACT x BLAST

    Science.gov (United States)

    Hajian, Amir; Battaglia,Nick; Bock, James J.; Bond, J. Richard; Nolta, Michael R.; Sievers, Jon; Wollack, Ed

    2011-01-01

    We present measurements of the auto- and cross-frequency correlation power spectra of the cosmic (sub)millimeter background at: 250, 350, and 500 microns (1200, 860, and 600 GHz) from observations made with the Balloon-borne Large Aperture Submillimeter Telescope, BLAST; and at 1380 and 2030 microns (218 and 148 GHz) from observations made with the Atacama Cosmology Telescope, ACT. The overlapping observations cover 8.6 deg(sup 2) in an area relatively free of Galactic dust near the south ecliptic pole (SEP). The ACT bands are sensitive to radiation from the CMB, the Sunyaev-Zel'dovich (SZ) effect from galaxy clusters, and to emission by radio and dusty star-forming galaxies (DSFGs), while the dominant contribution to the BLAST bands is from DSFGs. We confirm and extend the BLAST analysis of clustering with an independent pipeline, and also detect correlations between the ACT and BLAST maps at over 25(sigma) significance, which we interpret as a detection of the DSFGs in the ACT maps. In addition to a Poisson component in the cross-frequency power spectra, we detect a clustered signal at 4(sigma), and using a model for the DSFG evolution and number counts, we successfully fit all our spectra with a linear clustering model and a bias that depends only on red shift and not on scale. Finally, the data are compared to, and generally agree with, phenomenological models for the DSFG population. This study represents a first of its kind, and demonstrates the constraining power of the cross-frequency correlation technique to constrain models for the DSFGs. Similar analyses with more data will impose tight constraints 011 future models.

  16. Polydimethylsiloxane/MIL-100(Fe) coated stir bar sorptive extraction-high performance liquid chromatography for the determination of triazines in environmental water samples.

    Science.gov (United States)

    Lei, Yun; Chen, Beibei; You, Linna; He, Man; Hu, Bin

    2017-12-01

    Polydimethylsiloxane (PDMS)/MIL-100(Fe) coated stir bar was prepared by sol gel technique, and good preparation reproducibility was achieved with relative standard deviations (RSDs) ranging from 2.6% to 7.5% (n=7) and 3.6% to 10.8% (n=7) for bar-to-bar and batch-to-batch, respectively. Compared with commercial PDMS coated stir bar (Gerstel) and PEG coated stir bar (Gerstel), the prepared PDMS/MIL-100(Fe) stir bar showed better extraction efficiency for target triazines compounds. It also exhibited relatively fast extraction/desorption kinetics and long lifespan. Based on it, a method of PDMS/MIL-100(Fe) coated stir bar sorptive extraction (SBSE)-high performance liquid chromatography-ultraviolet detector (HPLC-UV) was developed for the determination of six triazines (simazine, atrazine, prometon, ametryn, prometryne and prebane) in environmental water samples. Several parameters affecting SBSE of six target triazines including extraction time, stirring rate, sample pH, ionic strength, desorption solvent and desorption time were investigated. Under the optimal experimental conditions, the limits of detection (LODs, S/N=3) were found to be in the range of 0.021-0.079μgL -1 . The repeatability RSDs were in the range of 2.3-6.3% (n=7, c=0.5μgL -1 ) and the enrichment factors (EFs) ranged from 51.1 to 102-fold (theoretical EF was 200-fold). The proposed method was applied to the analysis of target triazines in environmental water samples, with recoveries of 98.0-118% and 94.0-107% for spiked East Lake water and local pond water samples, respectively. Copyright © 2017. Published by Elsevier B.V.

  17. Synthesis of iron-based metal-organic framework MIL-53 as an efficient catalyst to activate persulfate for the degradation of Orange G in aqueous solution.

    Science.gov (United States)

    Pu, Mengjie; Guan, Zeyu; Ma, Yongwen; Wan, Jinquan; Wang, Yan; Brusseau, Mark L; Chi, Haiyuan

    2018-01-05

    A series of MIL-53(Fe) materials were synthesized using a solvothermal method under different temperature and time conditions and were used as catalysts to activate persulfate and degrade Orange G (OG). Influences of the above conditions on the crystal structure and catalytic behavior were investigated. Degradation of OG under different conditions was evaluated, and the possible activation mechanism was speculated. The results indicate that high synthesis temperature (larger than 170 °C) leads to poor crystallinity and low catalytic activity, while MIL-53(Fe) cannot fully develop at low temperature (100 or 120 °C). The extension of synthesis time from 5 h to 3 d can increase the crystallinity of the samples, but weakened the catalytic activity, which was caused by the reduction of BET surface area and the amount of Fe (II)-coordinative unsaturated sites. Among all the samples, MIL-53(Fe)-A possesses the best crystal structure and catalytic activity. In optimal conditions, OG can be totally decolorized after degradation for 90 min, and a removal rate of 74% for COD was attained after 120 min. The initial solution pH had great influence on OG degradation, with the greatest removal in acidic pH environment. ESR spectra showed that sulfate radical (SO 4 - ·), hydroxyl radical (OH·), persulfate radical (S 2 O 8 - ·), and superoxide radical (O 2 ·) exist in this system under acidic conditions. Furthermore, with the increase of pH, the relative amount of O 2 · increases while that of OH· and SO 4 - · decreases, resulting in a reduced oxidizing capacity of the system.

  18. A real time data acquisition system using the MIL-STD-1553B bus. [for transmission of data to host computer for control law processing

    Science.gov (United States)

    Peri, Frank, Jr.

    1992-01-01

    A flight digital data acquisition system that uses the MIL-STD-1553B bus for transmission of data to a host computer for control law processing is described. The instrument, the Remote Interface Unit (RIU), can accommodate up to 16 input channels and eight output channels. The RIU employs a digital signal processor to perform local digital filtering before sending data to the host. The system allows flexible sensor and actuator data organization to facilitate quick control law computations on the host computer. The instrument can also run simple control laws autonomously without host intervention. The RIU and host computer together have replaced a similar larger, ground minicomputer system with favorable results.

  19. Fabrication, interfacial characterization and mechanical properties of continuous Al{sub 2}O{sub 3} ceramic fiber reinforced Ti/Al{sub 3}Ti metal-intermetallic laminated (CCFR-MIL) composite

    Energy Technology Data Exchange (ETDEWEB)

    Han, Yuqiang; Lin, Chunfa; Han, Xiaoxiao; Chang, Yunpeng; Guo, Chunhuan, E-mail: guochunhuan@hrbeu.edu.cn; Jiang, Fengchun, E-mail: fengchunjiang@hrbeu.edu.cn

    2017-03-14

    Continuous Al{sub 2}O{sub 3} ceramic fiber reinforced Ti/Al{sub 3}Ti metal-intermetallic laminated (CCFR-MIL) composite was fabricated using a vacuum hot pressing (VHP) sintering method and followed by hot isostatic pressing (HIP). The microstructure characteristics of the interfaces between Ti and Al{sub 3}Ti, as well as Al{sub 2}O{sub 3} fiber and Al{sub 3}Ti intermetallic were analyzed by scanning electron microscopy (SEM). Elemental distribution in the interfacial reaction zones were quantitatively examined by energy-dispersive spectroscopy (EDS). The phases in the composite were identified by X-ray diffractometer (XRD). The mechanical properties of the CCFR-MIL composite were measured using compression and tensile tests under quasi-static strain rate. The experimental results indicated that the residual Al was found in Al{sub 3}Ti intermetallic layer of CCFR-MIL composite. The interfacial reactions occurred during HIP and the reaction products were determined to be Al{sub 2}Ti, TiSi{sub 2}, TiO{sub 2} and Al{sub 2}SiO{sub 5} phases. Compared to Ti/Al{sub 3}Ti MIL composite without fiber reinforcement, both the strength and failure strain of CCFR-MIL composite under both compressive and tensile stress states increased due to the contribution of the continuous ceramic Al{sub 2}O{sub 3} fiber.

  20. La universidad de lãs mil y una noches. The University of a Thousand and One Nights

    Directory of Open Access Journals (Sweden)

    Luis Porter

    2005-05-01

    Full Text Available Se trata de un artículo que surge de una pregunta hipotética, aunque indudablemente realista, formulada por un profesor universitario mientras transita rumbo a su institución: ¿Qué es mi universidad? ¿Qué me hace pasar de la decepción al entusiasmo, para volver después al sinsabor y remontar más tarde la alegría? Las respuestas dan lugar a un diálogo interior, durante el que se toma conciencia de que la educación trasciende las puertas y ventanas del aula, para llegar a aquellos lugares lejanos que Juvenal definía como "ultra Auroram et Gangem", ("más allá de la Aurora y el Ganges", y que nosotros, los latinoamericanos, podríamos llamar: "ultra Tropicus et Amazonam". En suma, en su diálogo interior el académico toma conciencia de que su labor educativa abarca un territorio mayor al constreñido a la geografía específica de un sitio o de una institución. De esta manera nos ayuda a asumir que en el ámbito de la educación existen varios atributos que debemos contribuir a crear o recrear: la esperanza, la oportunidad, la imaginación. También a entender que al dedicarnos a ejercer nuestra capacidad de re-lacionar, re-latar, referir y re-flexionar, organizamos, discurrimos, transferimos, construyendo nuestra narrativa, es decir la capacidad de urdir en cada jornada un nuevo plan. Planear cada día, será entonces, como Sherezada, tejer un nuevo cuento, necesario para poder seguir actuando, puesto que la palabra es el único hilo que le da sentido a nuestra condición de educadores, a nuestro ser universitario. This article uses the title of the famous book Arabian Nights which in Spanish (Las mil y una noches has a time connotation, similar to "for ever and a day" in English. In Spanish, "thousand" is a way to mean "infinite"; if you add one to infinite then you have numberless nights. The article departs from a hypothetical question an academic asks him/herself in his way to the educational institution where he-she works

  1. Magnetic solid-phase extraction of triazine herbicides from rice using metal-organic framework MIL-101(Cr) functionalized magnetic particles.

    Science.gov (United States)

    Liang, Li; Wang, Xinghua; Sun, Ying; Ma, Pinyi; Li, Xinpei; Piao, Huilan; Jiang, Yanxiao; Song, Daqian

    2018-03-01

    The metal-organic framework (MOF) functionalized magnetic graphene oxide/mesoporous silica composites (Fe 3 O 4 @SiO 2 -GO/MIL-101(Cr)) were synthesized and utilized as magnetic solid-phase extraction (MSPE) adsorbent for the extraction of seven triazine herbicides (terbuthylazine, secbumeton, terbumeton, atraton, atrazine, prometon and trietazine) in rice samples. Several experimental parameters, including type and volume of extraction solvent, amount of MIL-101(Cr), extraction time, volume of desorption solvent and desorption time were investigated and optimized. The limits of detection (LODs) of seven triazine herbicides obtained by using the proposed MSPE method combined with high performance liquid chromatography (HPLC) were in the range of 0.010-0.080µgkg -1 . The recoveries of the triazine herbicides in spiked rice samples ranged from of 83.9-103.5% with the relative standard deviations lower than 8.7%. The intra and inter-day (n = 6) precisions for all triazine herbicides at the spiked level of 100.0µgkg -1 were 1.4-5.9% and 2.6-7.8%, respectively. Copyright © 2017 Elsevier B.V. All rights reserved.

  2. Elucidating the Vibrational Fingerprint of the Flexible Metal–Organic Framework MIL-53(Al) Using a Combined Experimental/Computational Approach

    Science.gov (United States)

    2018-01-01

    In this work, mid-infrared (mid-IR), far-IR, and Raman spectra are presented for the distinct (meta)stable phases of the flexible metal–organic framework MIL-53(Al). Static density functional theory (DFT) simulations are performed, allowing for the identification of all IR-active modes, which is unprecedented in the low-frequency region. A unique vibrational fingerprint is revealed, resulting from aluminum-oxide backbone stretching modes, which can be used to clearly distinguish the IR spectra of the closed- and large-pore phases. Furthermore, molecular dynamics simulations based on a DFT description of the potential energy surface enable determination of the theoretical Raman spectrum of the closed- and large-pore phases for the first time. An excellent correspondence between theory and experiment is observed. Both the low-frequency IR and Raman spectra show major differences in vibrational modes between the closed- and large-pore phases, indicating changes in lattice dynamics between the two structures. In addition, several collective modes related to the breathing mechanism in MIL-53(Al) are identified. In particular, we rationalize the importance of the trampoline-like motion of the linker for the phase transition. PMID:29449906

  3. Correlation of Gas Permeability in a Metal-Organic Framework MIL-101(Cr)-Polysulfone Mixed-Matrix Membrane with Free Volume Measurements by Positron Annihilation Lifetime Spectroscopy (PALS).

    Science.gov (United States)

    Jeazet, Harold B Tanh; Koschine, Tönjes; Staudt, Claudia; Raetzke, Klaus; Janiak, Christoph

    2013-10-25

    Hydrothermally stable particles of the metal-organic framework MIL-101(Cr) were incorporated into a polysulfone (PSF) matrix to produce mixed-matrix or composite membranes with excellent dispersion of MIL-101 particles and good adhesion within the polymer matrix. Pure gas (O2, N2, CO2 and CH4) permeation tests showed a significant increase of gas permeabilities of the mixed-matrix membranes without any loss in selectivity. Positron annihilation lifetime spectroscopy (PALS) indicated that the increased gas permeability is due to the free volume in the PSF polymer and the added large free volume inside the MIL-101 particles. The trend of the gas transport properties of the composite membranes could be reproduced by a Maxwell model.

  4. Correlation of Gas Permeability in a Metal-Organic Framework MIL-101(Cr)–Polysulfone Mixed-Matrix Membrane with Free Volume Measurements by Positron Annihilation Lifetime Spectroscopy (PALS)

    Science.gov (United States)

    Jeazet, Harold B. Tanh; Koschine, Tönjes; Staudt, Claudia; Raetzke, Klaus; Janiak, Christoph

    2013-01-01

    Hydrothermally stable particles of the metal-organic framework MIL-101(Cr) were incorporated into a polysulfone (PSF) matrix to produce mixed-matrix or composite membranes with excellent dispersion of MIL-101 particles and good adhesion within the polymer matrix. Pure gas (O2, N2, CO2 and CH4) permeation tests showed a significant increase of gas permeabilities of the mixed-matrix membranes without any loss in selectivity. Positron annihilation lifetime spectroscopy (PALS) indicated that the increased gas permeability is due to the free volume in the PSF polymer and the added large free volume inside the MIL-101 particles. The trend of the gas transport properties of the composite membranes could be reproduced by a Maxwell model. PMID:24957061

  5. MIL-101(Cr)@GO for dispersive micro-solid-phase extraction of pharmaceutical residue in chicken breast used in microwave-assisted coupling with HPLC-MS/MS detection.

    Science.gov (United States)

    Wang, Yudan; Dai, Xinpeng; He, Xi; Chen, Lin; Hou, Xiaohong

    2017-10-25

    In this work, MIL-101(Cr)@GO (Graphite Oxide) was synthesized using a hydrothermal synthesis method and was applied as a dispersive micro-solid-phase extraction (D-μ-SPE) sorbent for the efficient concentration of four residual drugs (metronidazole, MNZ; tinidazole, TNZ; chloramphenicol, CAP; sulfamethoxazole, SMX). Meanwhile, the extraction process was optimized by combining it with microwave-assisted extraction. Factors affecting the D-μ-SPE efficiency, such as selection of sorbent materials, pH of the sample solution, salting-out effect, amount of used material, extraction time, desorption solvent and desorption time, were studied. Under the optimal extraction conditions, the linearity ranged from 10 to 1000ngkg -1 and 1-100ngkg -1 (r 2 ≥0.9928) for the target analytes. The limits of detection were between 0.08 and 1.02ngkg -1 , and the limits of quantitation were between 0.26 and 3.40ngkg -1 . Additionally, the developed method also exhibited good precision (RSD≤2.5%), repeatability (RSD≤4.3%), high recoveries (88.9%-102.3%) and low matrix effects (78.2%-95.1%). The proposed method proved to be an efficient and reliable approach for the determination of the analytes. Finally, we successfully detected the four drugs in chicken breast. Copyright © 2017 Elsevier B.V. All rights reserved.

  6. Comentario al libro "Los mil abrazos de Morfeo" de la Académica Eugenia Guzmán Cervantes

    Directory of Open Access Journals (Sweden)

    Adolfo de Francisco Zea

    2002-04-01

    Full Text Available

    Señor Presidente, Señores Académicos:


    Permítame, Señor Presidente, expresar a Usted y a la Junta Directiva de la Academia Nacional de Medicina mi profundo agradecimiento por la distinción de que he sido objeto al designárseme para hacer el comentario de orden al libro «Los Mil Abrazos de Morfeo», del que es autora la distinguida Académica y Profesora Titular del Departamento de Psicología de la Universidad Nacional, doña Eugenia Guzmán Cervantes, quien esta noche lo ha presentado con brillantez, erudición y amenidad ante los señores Académicos y el distinguido Auditorio que nos acompaña.

    La obra es el resultado de largos años de estudio y de trabajo de su autora en los campos de la neuropsicología clínica, la neurofisiología del sueño y sus diferentes patologías, la psicopatología de la conducta y los aspectos biológicos del comportamiento, y de su interés por incursionar en el área de los ritmos biológicos y sus implicaciones en la industria y el transporte aéreo, para compensar, según confiesa, su frustración al no haber podido ser piloto de pruebas.

    Esta ambición de Eugenia, frustrada en buena hora, le ha permitido llegar a alturas aún mayores que las que hubiera podido alcanzar como aviadora, al entregar a la comunidad científica este espléndido libro de casi trescientas páginas, treinta de las cuales corresponden a referencias bibliográficas, en las que actualiza los conocimientos que se tienen sobre el dormir y el soñar, discute con autoridad las diversas teorías formuladas sobre estas materias, analiza con propiedad los datos aportados por la ciencia en los últimos años y expone además, sus personales y bien sedimentadas opiniones sobre tan fascinantes temas.

    Por tratarse de asuntos que han inquietado a la humanidad desde tiempo inmemorial, es lógico que la autora se refiera a tres dioses de la mitología griega: Morfeo, el dios

  7. Experimental screening of porous materials for high pressure gas adsorption and evaluation in gas separations: application to MOFs (MIL-100 and CAU-10).

    Science.gov (United States)

    Wiersum, Andrew D; Giovannangeli, Christophe; Vincent, Dominique; Bloch, Emily; Reinsch, Helge; Stock, Norbert; Lee, Ji Sun; Chang, Jong-San; Llewellyn, Philip L

    2013-02-11

    A high-throughput gas adsorption apparatus is presented for the evaluation of adsorbents of interest in gas storage and separation applications. This instrument is capable of measuring complete adsorption isotherms up to 40 bar on six samples in parallel using as little as 60 mg of material. Multiple adsorption cycles can be carried out and four gases can be used sequentially, giving as many as 24 adsorption isotherms in 24 h. The apparatus has been used to investigate the effect of metal center (MIL-100) and functional groups (CAU-10) on the adsorption of N(2), CO(2), and light hydrocarbons on MOFs. This demonstrates how it can serve to evaluate sample quality and adsorption reversibility, to determine optimum activation conditions and to estimate separation properties. As such it is a useful tool for the screening of novel adsorbents for different applications in gas separation, providing significant time savings in identifying potentially interesting materials.

  8. Development of 30-pin connectors for electronic modules of C and I systems for NPP's confirming to customized MIL STD-1344 requirements

    International Nuclear Information System (INIS)

    Marathe, P.P.; Madala, Kalyan C.; Ramakrishna, P.

    2014-01-01

    The electrical connectors form an important constituent of C and I system where customized circuits and hardware is required to be configured meeting the Nuclear Power Plant regulatory requirements. C and I hardware has to handle multiple hundreds of I/O's and the system architectures are made in modular construction having C and I system hardware packaged in plug-in electronic modules in the required form factors. In addition if the system has to satisfy customized JSS 55555 requirements meeting stringent shock, vibration and environmental specifications, the connectors used for the electronic modules shall meet the customized MIL STD-1344 requirements and meet reliability target for the system. 30-pin type special connectors for electronic modules and 2x30 (60) pin field cabling connectors were developed meeting the required qualification specifications. (author)

  9. Identificada una malformació dental no gaire comuna en un individu del III mil·lenni aC

    OpenAIRE

    López Onaindia, Diego

    2016-01-01

    Un estudi de la UAB ha permès identificar el cas més antic de macrodòncia bilateral aïllada a les segones premolars inferiors descrit fins a la data. Es tracta d'una malformació dental no gaire comuna que s'ha trobat en un individu de la Cova del Pantà de Foix (Castellet i la Gornal, Barcelona), les inhumacions de la qual estan datades al III mil·lenni aC. Tot i que no es coneix la causa d'aquesta malformació, els resultats la relacionen amb l'existència de factors d'estrès ambiental que haur...

  10. Synthesis of highly efficient Mn{sub 2}O{sub 3} catalysts for CO oxidation derived from Mn-MIL-100

    Energy Technology Data Exchange (ETDEWEB)

    Zhang, Xiaodong, E-mail: fatzhxd@126.com [Environment and Low-Carbon Research Center, School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093 (China); Li, Hongxin; Hou, Fulin; Yang, Yang; Dong, Han; Liu, Ning [Environment and Low-Carbon Research Center, School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093 (China); Wang, Yuxin [Institute of Applied Biotechnology, Taizhou Vocation & Technical College, Taizhou, Zhejiang 318000 (China); Cui, Lifeng, E-mail: lifeng.cui@gmail.com [Environment and Low-Carbon Research Center, School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093 (China)

    2017-07-31

    Highlights: • The morphology of porous Mn{sub 2}O{sub 3} cubes was inherited from Mn-MIL-100 template. • Mn{sub 2}O{sub 3} obtained at calcined temperature of 700 °C displayed high activity. • Enhanced activity is attributed to surface active oxygen, and reduction behavior. - Abstract: In this work, metal-organic frameworks (MOFs) Mn-MIL-100 were first prepared, which were next used as templates to obtain the irregular porous Mn{sub 2}O{sub 3} cubes through calcination with air at different temperature. The catalysts were characterized by N{sub 2} adsorption-desorption, X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), H{sub 2}-temperature program reduction (H{sub 2}-TPR) and X-ray photoelectron spectroscopic (XPS). The catalytic activity for CO oxidation over Mn{sub 2}O{sub 3} catalysts was investigated. It was found that calcination temperature had a strong effect on the structure and catalytic activity of Mn{sub 2}O{sub 3} catalyst. Mn{sub 2}O{sub 3} catalyst obtained by calcined at 700 °C (Mn{sub 2}O{sub 3}-700) showed a smaller specific surface area, but displayed a high catalytic activity and excellent stability with a complete CO conversion temperature (T{sub 98}) of 240 °C, which was attributed to the unique structure, a high quantity of surface active oxygen species, smaller particle size, oxygen vacancies and good low temperature reduction behavior. The effect of water vapor on catalytic activity was also examined. The introduction of water vapor to the feedstock induced a positive effect on CO oxidation over Mn{sub 2}O{sub 3}-700 catalyst. Furthermore, no obvious drop is observed in activity over catalysts even in the presence of water vapor during 48 h.

  11. Composite Monopack for 120mm Mortar, With Plastic Pallet Adapters on a 42" x 53" Wooden Pallet, MIL-STD-1660 Tests, "Design Criteria for Ammunition Unit Loads", and Extreme Temperature Tests

    National Research Council Canada - National Science Library

    Dugan, Jeffery L

    2005-01-01

    ... (AMSRD-AAR-AIL-P) to conduct MIL-STD-1660 Tests to determine if the composite monopack for the 120MM mortar, with plastic pallet adapters on a 42" x 53" wooden pallet, designed by US Army ARDEC and manufactured...

  12. Ada Compiler Validation Summary Report: Certificate Number: 890804S1. 10142 Loral/Rolm Mil-Spec Computers ADE, Revision 3.01 MV 10000 Host and HAWK/32 Target

    Science.gov (United States)

    1989-08-04

    Date Owners Declaration I, the undersigned, representing agree that as part of the joint Marketing Agreement between Roim Mil-Spec and Data General for...possible. Format pragma NLINE (name (, namei): Where: name Specfies the subprogram or neric unit you want inLined at each calL The subprogam or

  13. Ada Compiler Validation Summary Report: Certificate Number: 890804S1.10141 Loral/Rolm Mil-Spec Computers ADE, Revision 3.01 MV 10000 Host and HAWK/32 Target

    Science.gov (United States)

    1989-08-04

    undersigned, representing /-- /Wz agree that as part of the joint Marketing Agreement between Rolm Mil-Spec and Data General for the Ada Development...the assembly (e wkhout the pragma. Source Code in the folowing emaple, prama NLINE applie to all tb calls to SQUARE in WrrH INLINF. procedure WITH

  14. A Simple Vortex-Assisted Magnetic Dispersive Solid Phase Microextraction System for Preconcentration and Separation of Triazine Herbicides from Environmental Water and Vegetable Samples Using Fe₃O₄@MIL-100(Fe) Sorbent.

    Science.gov (United States)

    Nasrollahpour, Atefe; Moradi, Seyyed Ershad

    2018-04-04

    A vortex-assisted magnetic dispersive solid phase microextraction coupled with high-performance liquid chromatography has been developed for the extraction and determination of triazine herbicides by using magnetic metal organic frameworks [Fe₃O₄@MIL-100(Fe)] in environmental water and vegetable samples. The Fe₃O₄@MIL-100(Fe) composite has been characterized by using X-ray diffraction spectroscopy, tunneling electron microscopy, thermogravimetric measurement, and Brunauer-Emmett-Teller analysis. The method is based on the sorption of triazine herbicides on Fe₃O₄@MIL-100(Fe) because of the complex formation between iron oxide nanoparticles and triazine herbicides beside π-π interactions between organic parts of Fe₃O₄@MIL-100(Fe) and triazine herbicides. The experimental parameters for the preconcentration of triazine herbicides, such as the type and volume of the eluent, pH, time of the sorption and desorption, and the amount of the sorbent, were optimized. Under the optimized conditions, the method was linear over the concentration range of 0.0061 to 70 ng/mL for each triazine herbicide, and the correlation coefficients ranged from 0.9988 to 0.9997. The limit of detection of the method at a signal-to-noise ratio of 3 was 2.0 to 5.3 ng/mL. The relative standard deviations for inter- and intraday assays were in the range of 5.8 to 10.2% and 3.8 to 6.3%, respectively.

  15. De Italo Calvino a Ricardo Piglia, do centro para a margem: o deslocamento como proposta para a literatura deste milênio

    Directory of Open Access Journals (Sweden)

    Renato Cordeiro Gomes

    2004-06-01

    Full Text Available O escritor italiano Italo Calvino deixou como testamento literário seis propostas que caracterizariam a literatura do "próximo milênio", mas não teve tempo de redigir a sexta dessas propostas, justamente a "consistência". O escritor argentino Ricardo Piglia, na conferência "Três propostas para o próximo milênio (e cinco dificuldades", proferida na Casa de las Américas, Cuba, em 2000, propõe, então, escrevê-la, não a consistência, mas o "deslocamento, a distância", para equacionar o problema do futuro da literatura e sua função na sociedade, vista, entretanto, a partir da margem, das bordas das tradições centrais da América Hispânica.El escritor italiano Italo Calvino ha dejado como testigo literario seis propuestas para caracterizar la literatura del "próximo milenio", pero no tuvo tiempo de escribir la sexta, justo la que llevaria el nombre de "consistencia". El escritor argentino Ricardo Piglia en su conferencia "Tres propuestas para el próximo milenio (y cinco dificultades", hecha en la Casa de Las Américas, Cuba, año 2000, intenta escribirla - no como consistencia - sino como "desplazamiento, distancia", para equacionar el problema del futuro de la literatura y su función en la sociedad, pero desde el margen, desde el borde de las tradiciones centrales de Hispano-América.The Italan writer Italo Calvino has left as his literary legacy the six proposals that would characterize the literature of the "next millenium", but he had no time to write "consistency", the sixth of these proposals. The Argentinian writer Ricardo Piglia at the "Three proposals for the next millenium (and five difficulties", conference held at "Casa de las Américas", Cuba, in 2000, proposes, therefore, to write the proposals "dislocation" and "distance" in the place of consistency, aiming at solving the problem of literature's future and its role in society, which is seen, however, from the edge, from the border of Spanish America's central

  16. THE SOFTWARE OF THE ADVANCED MIL-STD-1553B MULTIPLEX DATA BUS TESTER AND INTERFACE MODULE: FEATURES AND IMPLEMENTATION DETAILS

    Directory of Open Access Journals (Sweden)

    Dmitry E. Gouriev

    2018-03-01

    Full Text Available The UEM-MK is a new module of universal device and parametric tester of multiplex data bus, which meets all requirements for testing equipment for use in validation of devices against requirements of GOST R 52070-2003 (the same as MIL-STD-1553B Notice 4. The module can handle work of bus controller, up to 32 remote terminals and bus monitor/analyser simultaneously, can inject errors of all necessary types. In the article the software of the module is described. The software consist of: the driver, the control panel, the self-test program, the program for validation testing of remote terminals (PTOU, the extended function library, integrated environment (program BPOUEM. The latter three components are top-level components for users and software developments. The driver provides a connection with the module. Control panel provides module identification, self-testing and simplest actions on the bus in interactive mode. The PTOU program provides validation testing of remote terminals in accordance with the GOST R 51765-2001 test plan. The BPOUEM program lets users to create their own scenarios for testing and network environment imitation in interactive mode, whereas the extended function library lets the same in a form of application programs. Both these components also let to record and analyse bus traffic. The purpose, features and implementation details of all mentioned software components are described in the article, however, especial attention is paid to extended function library and the BPOUEM program.

  17. GUERRA, NACIÓN Y DERECHOS A LOS 112 AÑOS DE LA GUERRA DE LOS MIL DÍAS (1899-1902

    Directory of Open Access Journals (Sweden)

    Rafael Rubiano Muñoz

    2011-11-01

    Full Text Available A finales del siglo XIX, se produjo la Guerra de los Mil Días, acontecimiento abrupto de las confrontaciones acumuladas de las elites políticas colombianas en un largo ciclo. Bajo el dominio de los gobiernos de la Regeneración (1885-1902, se enfrentaron los conservadores nacionalistas, liderados por Miguel Antonio Caro, y los liberales radicales, dirigidos por Rafael Uribe Uribe, a quienes se les unieron circunstancialmente los conservadores históricos liderados por Carlos Martínez Silva y Marceliano Vélez. El artículo explora el sentido histórico y político de la guerra, se examinan sus consecuencias para el país, y sus incidencias en el siglo XX; se destacan en ese evento bélico, la pérdida de Panamá y la construcción del canal, la dictadura de Rafael Reyes conocido como el “quinquenio” y la propuesta del proyecto de Republicanismo, concebido por Carlos E. Restrepo, presidente entre 1910 a 1914, quien propuso una reforma constitucional, que planteaba las bases del Estado de derecho en Colombia.

  18. Fuel characteristics pertinent to the design of aircraft fuel systems, Supplement I : additional information on MIL-F-7914(AER) grade JP-5 fuel and several fuel oils

    Science.gov (United States)

    Barnett, Henry C; Hibbard, Robert R

    1953-01-01

    Since the release of the first NACA publication on fuel characteristics pertinent to the design of aircraft fuel systems (NACA-RM-E53A21), additional information has become available on MIL-F7914(AER) grade JP-5 fuel and several of the current grades of fuel oils. In order to make this information available to fuel-system designers as quickly as possible, the present report has been prepared as a supplement to NACA-RM-E53A21. Although JP-5 fuel is of greater interest in current fuel-system problems than the fuel oils, the available data are not as extensive. It is believed, however, that the limited data on JP-5 are sufficient to indicate the variations in stocks that the designer must consider under a given fuel specification. The methods used in the preparation and extrapolation of data presented in the tables and figures of this supplement are the same as those used in NACA-RM-E53A21.

  19. Mediciones épicas: un médico para 7 mil millones de pacientes. New York: Harper Collins Publishers, 2015

    Directory of Open Access Journals (Sweden)

    Héctor Gómez Dantés

    2015-07-01

    Full Text Available La lectura de un libro que describe el desarrollo de un innovador método de medición para conocer con la mayor precisión cómo enferman y mueren las poblaciones en el mundo no parecería tener ningún atractivo para esos 7 mil millones de personas mencionadas en el texto de Jeremy N. Smith. Uno se pregunta: ¿para qué queremos saber las razones de nuestra posible muerte, si la sociedad nos mueve a hacer todo lo posible por alcanzarla y de manera hasta prematura? Lo cierto es que los sistemas encargados de atender nuestra salud o, mejor dicho, nuestras enfermedades,desconocen la verdadera dimensión de los problemas que nos aquejan a nivel global y contabilizan razones o causas a nivel individual sin el menor sentido de precisión.razones o causas a nivel individual sin el menor sentido de precisión...

  20. A pesquisa em saúde e os objetivos do milênio: desafios e oportunidades globais, soluções e políticas nacionais

    Directory of Open Access Journals (Sweden)

    Morel Carlos M.

    2004-01-01

    Full Text Available Saúde, ciência e tecnologia são requisitos para o desenvolvimento econômico e social. Os Objetivos de Desenvolvimento do Milênio da ONU para 2015 representam um imenso desafio para os países em desenvolvimento. Esses países terão de organizar sistemas de pesquisa em saúde baseados em prioridades sanitárias e assegurar a incorporação dos resultados às políticas e ações de saúde. Avanços na área biomédica, em particular em genômica, abrem novas oportunidades, mas impõem desafios adicionais. O Brasil, possuidor de um forte parque industrial e uma vigorosa comunidade científica, tem capacidade para desenvolver um sistema de pesquisas em saúde capaz de contribuir efetivamente para o cumprimento das metas da ONU.

  1. Metal-organic framework MIL-101 as sorbent based on double-pumps controlled on-line solid-phase extraction coupled with high-performance liquid chromatography for the determination of flavonoids in environmental water samples.

    Science.gov (United States)

    Liu, Yue; Hu, Jia; Li, Yan; Li, Xiao-Shuang; Wang, Zhong-Liang

    2016-10-01

    A novel method with high sensitivity for the rapid determination of chrysin, apigenin and luteolin in environment water samples was developed by double-pumps controlled on-line solid-phase extraction (SPE) coupled with high-performance liquid chromatography (HPLC). In the developed technique, metal organic framework MIL-101 was synthesized and applied as a sorbent for SPE. The as-synthesized MIL-101 was characterized by scanning electron microscope, X-ray diffraction spectrometry, thermal gravimetric analysis and micropore physisorption analysis. The MIL-101 behaved as a fast kinetics in the adsorption of chrysin, apigenin and luteolin. On-line SPE of chrysin, apigenin and luteolin was processed by loading a sample solution at a flow rate of 1.0 mL/min for 10 min. The extracted analytes were subsequently eluted into a ZORBAX Bonus-RP analytical column (25 cm long × 4.6 mm i.d.) for HPLC separation under isocratic condition with a mobile phase (MeOH: ACN: 0.02 M H 3 PO 4 = 35:35:30) at a flow rate of 1.0 mL/min. Experimental conditions, including ionic strength, sample pH, sample loading rates, sample loading time and desorption analytes time, were further optimized to obtain efficient preconcentration and high-precision determination of the analytes mentioned above. The method achieved the merits of simplicity, rapidity, sensitivity, wide linear range and high sample throughput. The possible mechanism for the adsorption of flavonoids on MIL-101 was proposed. The developed method has been applied to determine trace chrysin, apigenin and luteolin in a variety of environmental water samples. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  2. A new indium metal-organic 3D framework with 1,3,5-benzenetricarboxylate, MIL-96 (In), containing μ 3-oxo-centered trinuclear units and a hexagonal 18-ring network

    International Nuclear Information System (INIS)

    Volkringer, Christophe; Loiseau, Thierry

    2006-01-01

    A new indium trimesate In 12 O(OH) 12 ({OH} 4 ,{H 2 O} 5 )[btc] 6 .∼31H 2 O, called MIL-96 (btc = 1,3,5-benzenetricarboxylate or trimesate species) was hydrothermally synthesized under mild condition (210 deg. C, 5 h) in the presence of trimethyl 1,3,5-benzenetricarboxylate in water and characterized by single-crystal X-ray diffraction technique. The MIL-96 (In) structure exhibits a three-dimensional metal-organic framework containing isolated trinuclear μ 3 -oxo-bridged indium clusters and infinite chains of InO 4 (OH) 2 and InO 2 (OH) 3 (H 2 O) octahedra generating a hexagonal network based on 18-membered ring. The two types of indium entities are connected to each other through the trimesate species which induce corrugated chains of indium octahedra, linked via μ 2 -hydroxo bonds with the specific -cis-cis-trans- sequence. The 3D framework of MIL-96 reveals three kind of cavities (two of them have estimated ∼ 400 A 3 volumes), in which are encapsulated free water molecules. The latter species are removed upon heating at 150 deg. C

  3. Solid-phase extraction with the metal-organic framework MIL-101(Cr) combined with direct analysis in real time mass spectrometry for the fast analysis of triazine herbicides.

    Science.gov (United States)

    Li, Xianjiang; Xing, Jiawei; Chang, Cuilan; Wang, Xin; Bai, Yu; Yan, Xiuping; Liu, Huwei

    2014-06-01

    MIL-101(Cr) is an excellent metal-organic framework with high surface area and nanoscale cavities, making it promising in solid-phase extraction. Herein, we used MIL-101(Cr) as a solid-phase extraction packing material combined with fast detection of direct analysis in real time mass spectrometry (DART-MS) for the analysis of triazine herbicides. After systematic optimization of the operation parameters, including the gas temperature of DART, the moving speed of the 1D platform, solvent for desorption, amount of MIL-101(Cr) extraction time, eluent volume and salt concentration, this method can realize the simultaneous detection of five kinds of triazine herbicides. The limits of detection were 0.1∼0.2 ng/mL and the linear ranges covered more than two orders of magnitude with the quantitation limits of 0.5∼1 ng/mL. Moreover, the developed method has been applied for the analysis of lake water samples and the recoveries for spiked analytes were in the range of 85∼110%. These results showed that solid-phase extraction with metal-organic frameworks is an efficient sample preparation approach for DART-MS analysis and could find more applications in environmental analysis. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  4. Atuação do pediatra nos primeiros mil dias da criança: a busca pela nutrição e desenvolvimento saudáveis

    Directory of Open Access Journals (Sweden)

    Antonio Jose Ledo Alves da Cunha

    2015-12-01

    Full Text Available Resumo Objetivos: Descrever o conceito dos primeiros mil dias, sua importância para a saúde e ações a serem implantadas, em especial pelos pediatras, para que a criança alcance nutrição e desenvolvimento saudáveis. Fonte dos dados: Revisão não sistemática nas bases SciELO, Lilacs, Medline, Scopus e Web of Science nos últimos dez anos com os termos mil dias, nutrição infantil, desenvolvimento infantil, infância, criança. Busca não sistemática na Internet de organizações que adotam o conceito dos mil dias e emitem recomendações sobre a saúde da criança. Síntese dos dados: Os primeiros mil dias vão da concepção até o fim do segundo ano de vida. É um importante período para intervenções que garantam nutrição e desenvolvimento saudáveis, que trarão benefícios em todo o ciclo de vida. As crianças devem receber alimentação adequada, por meio de nutrição pré-natal adequada, aleitamento materno exclusivo nos primeiros seis meses, adição de alimentos complementares adequados e continuação da amamentação até os dois anos. Face à condição de dependência absoluta de cuidados de um adulto, é fundamental que tenham um ambiente propício e acolhedor necessário para desenvolver laços fortes com seus cuidadores e lançar as bases para um desenvolvimento pleno e saudável. Conclusões: O pediatra, junto com outros profissionais, pode atuar na promoção de ações com ênfase no conceito dos primeiros mil dias que garantam a nutrição e o desenvolvimento saudáveis da criança. Focalizar ações nesse período poderá aumentar as chances de a criança ter uma vida saudável e produtiva no futuro, fortalecer famílias e comunidades e contribuir para quebrar o ciclo intergeracional da pobreza.

  5. El recluta. Testimonio literario del impacto de la Guerra de los Mil Días en la familia antioqueña

    Directory of Open Access Journals (Sweden)

    Jair Alexis Trujillo Mosquera

    2015-08-01

    Full Text Available Este ensayo da cuenta del resultado parcial de un estudio mayor, cuyo propósito fundamental es mostrar el impacto de la guerra en la esfera doméstica (social. Para este propósito, se analizó El recluta, antología de cuentos sobre la Guerra de los Mil Días. Esta obra tiene un valor fundamental y es que fue escrita durante la contienda, rasgo que la diferencia de casi toda la literatura de este período (y tema. La pregunta por la familia aparece de manera explícita en el libro: mediante convocatoria, en el año 1901, el periódico El Cascabel dirigido por H. Gaviria, propuso: “el siguiente tema para un cuento corto que no traspase los límites de tres columnas de El Cascabel: Un pobre recluta que ha hecho campaña en la presente contienda civil y que á su regreso encuentra en su hogar... lo que quieran que encuentre los Sres. Tomás Carrasquilla, Efe Gómez […]”. El recluta es valioso porque nos permite analizar la guerra desde una óptica distinta; este libro nos ofrece una mirada bifocal, ya que podemos adentrarnos en las vidas, tanto del recluta, como de su entorno, su familia, su vida doméstica; en otras palabras, dejar de mirar los ejércitos para ir a las “gentes” que están del otro lado de los campos de batalla. La guerra tiene la particularidad de actuar de manera estructural, sus tentáculos van mucho más allá de lo obvio, el combate. This essay accounts for partial results of a higher research which basic purpose is to show the impact of war on the domestic (social scenario. For this purpose, “El Recluta” (anthology of short stories about the “Guerra de los Mil Días” war. This book has a special value since it was written during the war, which is a trait that distinguishes it from almost the entire literature (and topics of such a period. The question about the family appears explicitly in the book: through a call made in 1901, newspaper “El Cascabel” directed by H. Gaviria, made the following proposal

  6. System for Comparing Gamma Sources Varying by Ratios of up to 1:1000; Dispositivo Gamma que para Comparar Fuentes Difieren Hasta uno En Mil

    Energy Technology Data Exchange (ETDEWEB)

    Tejera Rivera, A.; Navarro Cuevas, D. [Universidad Nacional Autonoma de Mexico, Mexico D.F. (Mexico)

    1967-03-15

    , principalmente gamma y de un mismo radioisotopo, cuando difieren en una relacion del orden de uno a miL La utilidad inmediata de este dispositivo es la elaboracion de patrones gamma para la calibracion de camaras de ionizacion que requieren actividades del orden de milicuries de radioisotopos, como el {sup 60}Co o el {sup 131}I, a partir de patrones respectivos con actividades del orden del microcurie. El principio en que se basan los dispositivos construidos es restringir el paso de la luz emitida por el cristal de centelleo al tubo fotomultiplicador. En el primer dispositivo se enmascaro la mitad de la cara del cristal de centelleo, Nal (TI), y la mitad de la cara del foto-multiplicador de tal forma que haciendo girar el cristal se sobreponen las mascaras y se restringe la luz desde 50% hasta 0%. Con este dispositivo se ha conseguido en la practica comparar actividades de uno a veinte. En el segundo dispositivo se han dispuesto cinco diafragmas en un disco rotatorio que permiten el paso desde 100% de luz hasta 1%. Usando este dispositivo es posible comparar fuentes que difieren hasta mil veces en actividad, manteniendo dentro de 100 000 cuentas/min la lectura del escalador. Este procedimiento resulta ventajoso principalmente porque disminuye el error debido a diferencias del tiempo muerto instrumental para los recuentos realizados con fuentes de muy diferente actividad y permite, ademas, comparar estas muestras usando un blindaje de dimensiones reducidas. (author)

  7. UN MONSTRUO DE MIL CABEZAS

    Directory of Open Access Journals (Sweden)

    Miriam Bautista González

    2015-01-01

    Full Text Available La comunicación interpersonal, muchas veces es dejada de lado por los comunicólogos, sin embargo tiene suma gravitación en las relaciones cotidianas entre las personas y en los procesos comunicacionales, toca el lenguaje de los gestos, la (in comunicación política, ceremonial y protocolo, intermediación en la comunicación, los jóvenes se incomunican. Respecto al Periodismo Investigativo señala que a pesar de los riesgos que implica el periodismo investigativo, muchos profesionales de América Latina no dudan en practicarlo, escudriñando muchas veces en temas que de no ser por ellos permanecerían ocultos. En otro artículo se habla de la importante repercusión que tuvo en América Latina el concurso CHASQUI, el que contó con la participación de profesionales de todo el continente. Incluye la entrega de entrevistas a destacados comunicadores de América Latina. Una sección está dedicada a las nuevas tecnologías: red de noticias y transmisiones vía satélite.

  8. Antes de la separación de Panamá: la guerra de los mil días, el contexto internacional y el canal

    Directory of Open Access Journals (Sweden)

    Thomas Fischer

    1998-01-01

    Full Text Available Los contemporáneos de finales del siglo pasado eran conscientes de vivir en un periodo de transición, que llevaba en su seno profundas contradicciones, sin saber qué les depararia el nuevo siglo. Así pues, se sentían los hombres que hacían historia al final del siglo pasado en Colombia. En 1899 empezó una guerra civil, la llamada guerra de los mil días. Este enfrentamiento significó la culminación de una serie de guerras civiles que marcaron el siglo XIX. Aunque el conflicto armado entre liberales y conservadores no afectó a todas las regiones de la misma manera, dividió a la población más que nunca. Fue quizá la guerra más desastrosa, tanto en lo referente a los daños ocasionados en la economía nacional como en relación a las bajas humanas registradas. Un año después del final de la guerra se separó el departamento de Panamá. Esto se debió a la fragilidad del concepto nacional de Colombia que tenía un sistema político poco apto para asistir a la negociación del problema más urgente de la agenda internacional del país: la transacción de los derechos para excavar y construir por territorio colombiano un canal que uniría el Oceano Atlántico con el Pacífico en favor de los Estados Unidos. Con la ocupación de Cuba y Puerto Rico esta potencia se había establecido como poder hegemónico en la región, desplazando a las potencias europeas. No cabe duda de que la crisis que atravesó Colombia marcó un cambio fundamental en la conciencia nacional.

  9. In-tube solid-phase microextraction based on NH2-MIL-53(Al)-polymer monolithic column for online coupling with high-performance liquid chromatography for directly sensitive analysis of estrogens in human urine.

    Science.gov (United States)

    Luo, Xialin; Li, Gongke; Hu, Yufei

    2017-04-01

    In this work, a novel NH 2 -MIL-53(Al) incorporated poly(styrene-divinylbenzene-methacrylic acid) (poly(St-DVB-MAA)) monolith was prepared via chemical fabrication. Moreover, it has been efficiently applied to the in-tube solid-phase microextraction (SPME) for online coupling with high-performance liquid chromatography (HPLC) to the direct determination of five estrogens in human urine samples. The NH 2 -MIL-53(Al)-polymer monolith was suitable for in-tube SPME owing to its good permeability, high extraction efficiency, chemical stability, good reproducibility and long lifetime. The extraction conditions including extraction solvent, pH of sample solution, flow rate of extraction and desorption, and desorption volume were investigated. Under the optimum conditions, the enrichment factors were 180-304 and saturated amounts of extraction were 2326-21393 pmol for estriol, 17β-estradiol, estrone, ethinyl estradiol and progesterone, respectively. The adsorption mechanism was also explored which contributed to its strong extraction to target compounds. The proposed method had low limit of detection (2.0-40ng/L) and good linearity (with R 2 between 0.9908 and 0.9978). Four endogenous estrogens were detected in urine samples and the recoveries of all five analytes were ranged from 75.1-120% with relative standard deviations (RSDs) less than 8.7%. The results showed that the proposed online SPME-HPLC method based on NH 2 -MIL-53(Al)-polymer monolithic column was highly sensitive for directly monitoring trace amount of estrogens in human urine sample. Copyright © 2016 Elsevier B.V. All rights reserved.

  10. A Collection of Technical Studies Completed for the Computer-Aided Acquisition and Logistic Support (CALS) Program Fiscal Year 1988. Volume 2. Graphics, CGM MIL SPEC

    Science.gov (United States)

    1991-03-01

    for the Exchange of 3 Product Model Data A. Ducrot SC2 Character Sets and Coding I E. Jungmann JTC1 SG-FS Functional Standardization 5 G. Schaeffer...Produce 2ndS( Ducrot ) of CG Working Draft between ??, GKS Maintenance RG Produce NW! 88-12 and UK VT & R Liaison and base 89-02 (Brcdlie) (with WG51

  11. Effects of ligand functionalization on the photocatalytic properties of titanium-based MOF: A density functional theory study

    Science.gov (United States)

    Li, Yi; Fu, Yuqing; Ni, Bilian; Ding, Kaining; Chen, Wenkai; Wu, Kechen; Huang, Xin; Zhang, Yongfan

    2018-03-01

    The first principle calculations have been performed to investigate the geometries, band structures and optical absorptions of a series of MIL-125 MOFs, in which the 1,4-benzenedicarboxylate (BDC) linkers are modified by different types and amounts of chemical groups, including NH2, OH, and NO2. Our results indicate that new energy bands will appear in the band gap of pristine MIL-125 after introducing new group into BDC linker, but the components of these band gap states and the valence band edge position are sensitive to the type of functional group as well as the corresponding amount. Especially, only the incorporation of amino group can obviously decrease the band gap of MIL-125, and the further reduction of the band gap can be observed if the amount of NH2 is increased. Although MIL-125 functionalized by NH2 group exhibits relatively weak or no activity for the photocatalytic O2 evolution by splitting water, such ligand modification can effectively improve the efficiency in H2 production because now the optical absorption in the visible light region is significantly enhanced. Furthermore, the adsorption of water molecule becomes more favorable after introducing of amino group, which is also beneficial for the water-splitting reaction. The present study can provide theoretical insights to design new photocatalysts based on MIL-125.

  12. Synthesis, characterization and sorption properties of functionalized Cr-MIL-101-X (X=–F, –Cl, –Br, –CH{sub 3}, –C{sub 6}H{sub 4}, –F{sub 2}, –(CH{sub 3}){sub 2}) materials

    Energy Technology Data Exchange (ETDEWEB)

    Buragohain, Amlan [Department of Chemistry, Indian Institute of Technology Guwahati, 781039 Assam (India); Couck, Sarah [Department of Chemical Engineering, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels (Belgium); Van Der Voort, Pascal [Department of Inorganic and Physical Chemistry, Ghent University, COMOC – Center for Ordered Materials, Organometallics and Catalysis, Krijgslaan 281-S3, 9000 Ghent (Belgium); Denayer, Joeri F.M. [Department of Chemical Engineering, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels (Belgium); Biswas, Shyam, E-mail: sbiswas@iitg.ernet.in [Department of Chemistry, Indian Institute of Technology Guwahati, 781039 Assam (India)

    2016-06-15

    Four existing and three new functionalized chromium terephthalates having MIL-101 topology and denoted as Cr-MIL-101-X (existing ones with X=–F, 1-F; –Cl, 2-Cl; –Br, 3-Br; –CH{sub 3}, 4-CH{sub 3}; new ones with X=–C{sub 6}H{sub 4}, 5-C{sub 6}H{sub 4}; –F{sub 2}, 6-F{sub 2}, –(CH{sub 3}){sub 2}, 7-(CH{sub 3}){sub 2}) were synthesized under hydrothermal conditions. All the materials except 5-C{sub 6}H{sub 4} could be prepared by a general synthetic route, in which the mixtures of CrO{sub 3}, H{sub 2}BDC-X (BDC=1,4-benzenedicarboxylate) linkers, conc. HCl and water with a molar ratio of 1:1:3.9:222.2 were reacted at 180 °C for 144 h. Compared to the 144 h of synthesis time, three of the compounds, namely 1-Cl, 2-Br and 5-C{sub 6}H{sub 4}, could be prepared in much shorter reaction times (12–18 h at 180–210 °C). The materials possess high thermal stability up to 270–300 °C in an air atmosphere. The activated compounds exhibit significant porosity (S{sub BET} range: 1273–2135 m{sup 2} g{sup −1}). At 0 °C and 1 bar, the CO{sub 2} adsorption capacities of the compounds fall in the 1.7–2.9 mmol g{sup −1} range. Compounds 1-F and 6-F{sub 2} showed enhanced CO{sub 2} uptake values compared to parent Cr-MIL-101. The benzene adsorption capacities of the compounds lie in the range of 66.2–139.5 molecules per unit cell at 50 °C and p/p{sub 0}=0.35. The increased benzene uptake value of 1-F compared to un-functionalized Cr-MIL-101 and 4-CH{sub 3} suggests that the fluorination has induced more hydrophobicity in Cr-MIL-101 as compared to the methylation. - Graphical abstract: Benzene adsorption by seven functionalized Cr-MIL-101-X metal-organic framework (MOF) materials Display Omitted - Highlights: • Seven functionalized Cr-MIL-101-X materials were synthesized solvothermally. • All Cr-MIL-101-X materials exhibited high thermal stability up to 270–300 °C in air. • All Cr-MIL-101-X compounds displayed considerable porosity towards N{sub 2

  13. Synthesis, characterization and sorption properties of functionalized Cr-MIL-101-X (X=–F, –Cl, –Br, –CH3, –C6H4, –F2, –(CH3)2) materials

    International Nuclear Information System (INIS)

    Buragohain, Amlan; Couck, Sarah; Van Der Voort, Pascal; Denayer, Joeri F.M.; Biswas, Shyam

    2016-01-01

    Four existing and three new functionalized chromium terephthalates having MIL-101 topology and denoted as Cr-MIL-101-X (existing ones with X=–F, 1-F; –Cl, 2-Cl; –Br, 3-Br; –CH 3 , 4-CH 3 ; new ones with X=–C 6 H 4 , 5-C 6 H 4 ; –F 2 , 6-F 2 , –(CH 3 ) 2 , 7-(CH 3 ) 2 ) were synthesized under hydrothermal conditions. All the materials except 5-C 6 H 4 could be prepared by a general synthetic route, in which the mixtures of CrO 3 , H 2 BDC-X (BDC=1,4-benzenedicarboxylate) linkers, conc. HCl and water with a molar ratio of 1:1:3.9:222.2 were reacted at 180 °C for 144 h. Compared to the 144 h of synthesis time, three of the compounds, namely 1-Cl, 2-Br and 5-C 6 H 4 , could be prepared in much shorter reaction times (12–18 h at 180–210 °C). The materials possess high thermal stability up to 270–300 °C in an air atmosphere. The activated compounds exhibit significant porosity (S BET range: 1273–2135 m 2 g −1 ). At 0 °C and 1 bar, the CO 2 adsorption capacities of the compounds fall in the 1.7–2.9 mmol g −1 range. Compounds 1-F and 6-F 2 showed enhanced CO 2 uptake values compared to parent Cr-MIL-101. The benzene adsorption capacities of the compounds lie in the range of 66.2–139.5 molecules per unit cell at 50 °C and p/p 0 =0.35. The increased benzene uptake value of 1-F compared to un-functionalized Cr-MIL-101 and 4-CH 3 suggests that the fluorination has induced more hydrophobicity in Cr-MIL-101 as compared to the methylation. - Graphical abstract: Benzene adsorption by seven functionalized Cr-MIL-101-X metal-organic framework (MOF) materials Display Omitted - Highlights: • Seven functionalized Cr-MIL-101-X materials were synthesized solvothermally. • All Cr-MIL-101-X materials exhibited high thermal stability up to 270–300 °C in air. • All Cr-MIL-101-X compounds displayed considerable porosity towards N 2 , CO 2 and benzene. • Mono- and di-fluorinated Cr-MIL-101 materials showed enhanced CO 2 adsorption capacities.

  14. Interannual variability in seagrass carbon and nitrogen stable isotopes from the Florida Keys National Marine Sanctuary, a preliminary study

    Science.gov (United States)

    Fourqurean, J. W.; Fourqurean, J. W.; Anderson, W. T.; Anderson, W. T.

    2001-12-01

    The shallow marine waters surrounding the southern tip of Florida provide an ideal environment for seagrasses, which are the most common benthic community in the region. Yet, these communities are susceptible to a variety of anthropogenic disturbances, especially changes in water quality caused by an increase the nutrient flux to the near shore environment. In order to better understand the carbon and nitrogen isotopic ratio in marine plants, an extensive times series analysis was constructed from quarterly sampling of Thalassia testudinum (the dominate species in the study area) from 1996 through 1998. Sites for study where selected from permanent stations within the Florida Keys National Marine Sanctuary (FKNMS), from both sides of the Florida Keys - two stations on the bay side and two stations on the reef side. These data will also help to constrain elements of the carbon and nitrogen cycles affecting this region. The data analyzed over the three year study period show unique cyclic trends associated with seasonal changes in primary productivity and potentially changes in the nitrogen and carbon pools. Additionally, the analysis of our time series indicates that isotope food web studies need to take into account spatial and temporal changes when evaluating trophic levels. The mean carbon and nitrogen isotope values of T. testudinum from all 4 stations vary respectively from -7.2 per mil to -10.41 and 1.1 per mil to 2.2 per mil (n = 48). However, certain stations displayed anonymously depleted nitrogen isotope values, values as low as -1.2 per mil. These values potentially indicated that biogeochmical processes like N fixation, ammonification and denitrification cause regional pattern in the isotopic composition of the source DIN. Both carbon and nitrogen isotopes displayed seasonal enrichment-depletion trends, with maximum enrichment occurring during the summer. The overall seasonal variation for carbon 13 from the different stations ranged from 1 per mil to

  15. A Comparative Study on the Meaning in Life of Patients with Cancer and Their Family Members.

    Science.gov (United States)

    Hassankhani, Hadi; Soheili, Amin; Hosseinpour, Issa; Eivazi Ziaei, Jamal; Nahamin, Mina

    2017-12-01

    Introduction: The overwhelming effects of cancer could be catastrophic for the patients and their family members, putting them at risk of experiencing uncertainty, loss, and an interruption in life. Also, it can influence their sense of meaning, a fundamental need equated with the purpose in life. Accordingly, this study aimed to compare the meaning in life (MiL) of patients with cancer and their family members. Methods: This descriptive comparative study was conducted on 400 patients with cancer and their family members admitted to university hospitals in Tabriz and Ardebil provinces, Iran. The participants were sampled conveniently and the Life Evaluation Questionnaire (LEQ) were used for collecting data analyzed through descriptive and inferential statistics in SPSS ver. 13 Software. Results: The mean score for the MiL of the patients with cancer and their family members was 119 (16.92) and 146.2 (17.07), respectively. There was a significant difference between patients with cancer and their family members in terms of MiL. Conclusion: The MiL of patients with cancer is lower than that of their family members, which indicates the need for further attention to the psychological processes and their modification in Iranian healthcare systems.

  16. Junta de soldadura disímil de la aleación hk – 40 y del hierro fundido 24//Dissimilar welding joints of the alloy hk - 40 and of the cast iron 24

    Directory of Open Access Journals (Sweden)

    Tomás Fernández‐Columbié

    2014-05-01

    Full Text Available El objetivo del trabajo es establecer el comportamiento microestructural de una unión soldada disímil en una aleación HK 40 y el hierro fundido 24, la cual se realiza en equipo que prestan servicios en la industria del níquel y que por las características de la unión, surgen en el mismo problema de agrietamiento. Se realizó una caracterización química de ambas aleaciones, luego por el proceso demecanizado se prepararon un total de nueve muestras, las que fueron soldada por proceso manual por arco eléctrico, los electrodos revestidos empleados fueron el E 312–16, el UTP 65 y el Castell Xiron 244, demostrándose en el análisis microestructural y en el diagrama de Schaeffler, que la disposición de la unión con el electrodo E 312–16 provoca la aparición de estructura interdendritica con origen a la fundición blanca, siendo más favorable la unión con el electrodo UTP 65. Se le realizó el análisis de microdureza en cada unión.Palabras claves: disímil, aleación, agrietamiento, soldadura, electrodos._____________________________________________________________________________AbstractIt is paper have the objective to establish the behaviour microstructure of an union welded dissimilar in an alloy HK 40 and the cast iron 24, which is carried out in team that you lend services in the industry of the nickel and that for the characteristics of the union, they arise in the same cracking problem. He was carried out a chemical characterization of both alloys, then for the process ofautomated got ready a total of nine samples, those that were welding for process shield for electric arch (SMAW, the electrodes lined employees were the E 312 - 16, the UTP 65 and the Castell Xiron 244, being demonstrated in the analysis microstructure and in the diagram of Schaeffler that the disposition of the union with the electrode E 312 - 16 cause the appearance of structure inter dendritewith origin to the white foundry, being more available the union

  17. Talaromyces marneffei Genomic, Transcriptomic, Proteomic and Metabolomic Studies Reveal Mechanisms for Environmental Adaptations and Virulence

    Directory of Open Access Journals (Sweden)

    Susanna K. P. Lau

    2017-06-01

    Full Text Available Talaromyces marneffei is a thermally dimorphic fungus causing systemic infections in patients positive for HIV or other immunocompromised statuses. Analysis of its ~28.9 Mb draft genome and additional transcriptomic, proteomic and metabolomic studies revealed mechanisms for environmental adaptations and virulence. Meiotic genes and genes for pheromone receptors, enzymes which process pheromones, and proteins involved in pheromone response pathway are present, indicating its possibility as a heterothallic fungus. Among the 14 Mp1p homologs, only Mp1p is a virulence factor binding a variety of host proteins, fatty acids and lipids. There are 23 polyketide synthase genes, one for melanin and two for mitorubrinic acid/mitorubrinol biosynthesis, which are virulence factors. Another polyketide synthase is for biogenesis of the diffusible red pigment, which consists of amino acid conjugates of monascorubin and rubropunctatin. Novel microRNA-like RNAs (milRNAs and processing proteins are present. The dicer protein, dcl-2, is required for biogenesis of two milRNAs, PM-milR-M1 and PM-milR-M2, which are more highly expressed in hyphal cells. Comparative transcriptomics showed that tandem repeat-containing genes were overexpressed in yeast phase, generating protein polymorphism among cells, evading host’s immunity. Comparative proteomics between yeast and hyphal cells revealed that glyceraldehyde-3-phosphate dehydrogenase, up-regulated in hyphal cells, is an adhesion factor for conidial attachment.

  18. Microestructura de una unión disímil AISI 321 y una aleación A 351 grado HK-40 obtenida mediante soldadura manual por arco eléctrico

    Directory of Open Access Journals (Sweden)

    Reilis Fuentes-Guilarte

    2016-05-01

    Full Text Available El objetivo fue establecer el comportamiento microestructural de una unión disímil de acero inoxidable austenítico AISI 321 y de la aleación A 351 grado HK 40 obtenida por fundición mediante soldadura manual por arco eléctrico y electrodos revestidos del tipo E 309 L-16. La estructura ferrita–austeníta que se forma en la unión del acero con la aleación es resultado del elevado contenido de carbono de la segunda. La baja velocidad de enfriamiento del cordón de soldadura revela ausencia de discontinuidades en el retículo cristalino de la zona afectada térmicamente y atenúa la formación de carburos de cromo del tipo Cr23C6, que puede formar la aleación A 351 grado HK 40 durante la difusión del volumen de fracción en masa del cromo.

  19. Padrões para germinação, pureza, umidade e peso de mil sementes em análises de sementes de espécies florestais nativas do Rio Grande do Sul

    Directory of Open Access Journals (Sweden)

    Fernanda de Oliveira Brüning

    2011-06-01

    Full Text Available O presente trabalho teve como objetivo propor padrões de confiabilidade, em relação à germinação, pureza, peso de mil sementes e grau de umidade das sementes, visando ao controle de qualidade das análises de sementes de espécies florestais. Para tanto, foram utilizados resultados de análises de sementes de espécies florestais em laboratório, a partir do ano de 1997 até 2007, obtidos dos arquivos do Laboratório de Análise de Sementes da Fundação Estadual de Pesquisa Agropecuária do Estado do Rio Grande do Sul. Os padrões de confiabilidade foram construídos com base em uma análise de normalidade dos dados e da utilização do critério do pseudossigma. Os limites se mostraram eficientes no estabelecimento do valor mínimo aceitável para que um lote de sementes seja comercializado, propondo que valores de germinação dentro dos limites de confiabilidade baixos devem ser descartados, pois não apresentam índices germinativos aceitáveis. 

  20. Experimental and molecular docking investigation on metal-organic framework MIL-101(Cr) as a sorbent for vortex assisted dispersive micro-solid-phase extraction of trace 5-nitroimidazole residues in environmental water samples prior to UPLC-MS/MS analysis.

    Science.gov (United States)

    Lu, Nan; Wang, Ting; Zhao, Pan; Zhang, Lianjun; Lun, Xiaowen; Zhang, Xueli; Hou, Xiaohong

    2016-11-01

    In the presented work, metal-organic framework (MOF) material MIL-101(Cr) (MIL, Matérial Institute Lavoisier) was used as a sorbent for vortex assisted dispersive micro-solid-phase extraction (VA-D-μ-SPE) of trace amount of metronidazole (MNZ), ronidazole (RNZ), secnidazole (SNZ), dimetridazole (DMZ), tinidazole (TNZ), and ornidazole (ONZ) in different environmental water samples. Ultra-high-performance liquid chromatography coupled with tandem mass spectrometry (UPLC-MS/MS) was used to quantify the target analytes. The extraction conditions, including type of sorbents, amount of MIL-101(Cr), solution pH, extraction method, extraction time, effect of salt, and elution conditions were investigated. Upon the optimal conditions, the developed method showed an excellent extraction performance with the average recovery ranging from 75.2 to 98.8 %. Good sensitivity levels were achieved with the detection limits of 0.03∼0.06 μg/L and the quantitation limits of 0.09∼0.20 μg/L. The linear ranges were varied from 0.1 to 20 for SNZ and ONZ and from 0.2 to 40 μg/L for MNZ, RNZ, DMZ, and TNZ (r 2  > 0.992), and repeatability of the method was satisfactory with the relative standard deviations (RSD) extraction and determination of 5-nitroimidazoles (5-NDZs) in 12 real water samples, showing the positive findings of MNZ and TNZ ranging from 0.3 to 1.0 μg/L. Furthermore, molecular docking was applied to explain the molecular interactions and free binding energies between MIL-101(Cr) and 5-NDZs, providing a deep insight into the adsorption mechanism. The proposed method exhibited the advantages of simplicity, rapidly, less solvent consumption, ease of operation, higher sensitivity, and lower matrix effect. Graphical abstract Schematic diagram of the extraction process and molecular docking investigation.

  1. A Prospective Observational Study of Abdominal Injury Management in Contemporary Military Operations: Damage Control Laparotomy Is Associated With High Survivability and Low Rates of Fecal Diversion

    Science.gov (United States)

    2015-04-01

    and rural application of the damage control philosophy. Mil Med. 2001;166:490–493. 12. Eiseman B, Moore EE, Meldrum DR, et al. Feasibility of damage...application of tranex- amic acid in trauma emergency resuscitation (MATTERs) study. Arch Surg. 2012;147:113–119. 70. Penn-Barwell JG, Roberts S

  2. 'You've got m@il: fluoxetine coming soon!': accessibility and quality of a prescription drug sold on the web.

    Science.gov (United States)

    Gelatti, U; Pedrazzani, R; Marcantoni, C; Mascaretti, S; Repice, C; Filippucci, L; Zerbini, I; Dal Grande, M; Orizio, G; Feretti, D

    2013-09-01

    The increasing phenomenon of online pharmacies has potential for serious public health problems. This study aimed to evaluate the possibility of accessing a prescription drug in the absence of a prescription for an Italian purchaser. Fluoxetine pills were ordered from several online pharmacies. The study included website analysis, and the quality of the received product including packaging, chemical and microbiological analyses. Orders could be placed correctly on 61 of the 98 selected websites, and a sales transaction was concluded successfully on 17 websites. Thirteen drug samples were eventually received. In one case it was necessary to fill in a questionnaire before ordering the drugs. All websites displayed aggressive marketing strategies. There was wide variation in terms of domain registration, company base (when declared) and manufacturer's location (mostly India). All pills were delivered in sealed blister packs showing the lot number and manufacturer's details. A leaflet was enclosed in one case only. In three cases we received more pills than ordered, and in one case Viagra pills as a free gift. Pharmacopoeia microbiological requirements were satisfied. Chemical analysis revealed that the active principle was always present, although many samples did not meet the Pharmacopoeia "other impurities" or "total impurities" criteria. Heavy metals and solvents regulated by the Pharmacopoeia did not exceed the set limits; some of the non-regulated ones were also assessed, in some cases with a positive result (e.g. styrene). About 20% of purchase attempts resulted in delivery of the drugs, even in the absence of a medical prescription. Traceability was poor and drug quality was generally worse compared to conventional pharmacy-purchased products. Based on all these broad-spectrum results, user safety appears not to be globally guaranteed. Copyright © 2013 Elsevier B.V. All rights reserved.

  3. A separable surface-enhanced Raman scattering substrate modified with MIL-101 for detection of overlapping and invisible compounds after thin-layer chromatography development.

    Science.gov (United States)

    Zhang, Bin Bin; Shi, Yi; Chen, Hui; Zhu, Qing Xia; Lu, Feng; Li, Ying Wei

    2018-01-02

    By coupling surface-enhanced Raman spectroscopy (SERS) with thin-layer chromatography (TLC), a powerful method for detecting complex samples was successfully developed. However, in the TLC-SERS method, metal nanoparticles serving as the SERS-active substrate are likely to disturb the detection of target compounds, particularly in overlapping compounds after TLC development. In addition, the SERS detection of compounds that are invisible under both visible light and UV 254/365 after TLC development is still a significant challenge. In this study, we demonstrated a facile strategy to fabricate a TLC plate with metal-organic framework-modified gold nanoparticles as a separable SERS substrate, on which all separated components, including overlapping and invisible compounds, could be detected by a point-by-point SERS scan along the developing direction. Rhodamine 6G (R6G) was used as a probe to evaluate the performance of the substrate. The results indicated that the substrate provided good sensitivity and reproducibility, and optimal SERS signals could be collected in 5 s. Furthermore, this new substrate exhibited a long shelf life. Thus, our method has great potential for the sensitive and rapid detection of overlapping and invisible compounds in complex samples after TLC development. Copyright © 2017 The Author(s). Published by Elsevier B.V. All rights reserved.

  4. Metrication of MIL-HDBK-5C

    Science.gov (United States)

    1980-08-01

    is presented here for the sake of unifor- appropriate Federal, Military, or SAE Aerospacemity and to emphasize certain principles of Material...Considerations. -The indicated for air melted steel heat treated to pro- AISI or SAE alloy steels contain, in addition to duce a quench structure...D6ACb D6ACc 1379 MPa -- AISI 8740 AISI 4140 AISI 4 3 40 b AISI 4340 c AISI 4 340 d AMS Gradesbe AMS Gradesce D6ACb 1,6ACc 1241 MPa AISI 4130 AISI 8735

  5. Digital Line Graphs (DLG) 2MIL

    Data.gov (United States)

    Kansas Data Access and Support Center — The DLG data files derived from the 1:2,000,000-scale maps contain selected base categories of cartographic data in digital form. The data files are derived from the...

  6. Habitação de iniciativa pública em Luanda e Maputo: modelos de intervenção e impactos socioterritoriais no novo milénio

    Directory of Open Access Journals (Sweden)

    Vanessa de Pacheco Melo

    2015-02-01

    Full Text Available No início do novo milénio, em pleno contexto global neoliberal, Luanda e Maputo assistem à consolidação de diferentes paradigmas de intervenção urbana, associados a determinados modelos habitacionais de iniciativa pública, evidenciando-se os condomínios em altura e a habitação de piso único de crescimento extensivo. Atendendo às especificidades contextuais dessas duas capitais lusófonas e a suas grandes desigualdades socioterritoriais, recorremos ao conceito de «direito à cidade» para, por meio da análise de quatro casos de estudo, refletir sobre a adequação das soluções adotadas no âmbito desses dois modelos habitacionais, para a redução dessas desigualdades, no que se refere: às condições de habitabilidade, ao acesso aos benefícios da urbanização e à participação e apropriação de uma vida urbana transformada. Nesse contexto, onclui-se que existe um desequilíbrio entre o investimento estatal e as reais necessidades da maioria da população, tendencialmente de baixos recursos, que limita o «direito à cidade», no que se refere ao acesso às condições de habitabilidade e aos benefícios da urbanização. Esta limitação verifica-se quer nos condomínios em altura, direcionados para uma população de média e alta renda, quer na habitação de piso único de crescimento extensivo, mais adaptada à classe de menores recursos e onde a apropriação é possibilitada em ambos os contextos. Nenhum dos casos engloba todos os direitos contemplados pelo «direito à cidade», mas Maputo apresenta um panorama mais favorável, em parte devido a uma maior abertura à descentralização e participação popular na tomada de decisões e partilha de responsabilidades.

  7. A study of crystalline biomaterials for articular cartilage bioengineering

    Energy Technology Data Exchange (ETDEWEB)

    Gross-Aviv, Talia [Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer Sheva, 84105 (Israel)], E-mail: taliag@bgu.ac.il; DiCarlo, Bryan B. [Department of Bioengineering, Rice University, Houston, TX 77003 (United States)], E-mail: bdicarlo@rice.edu; French, Margaret M. [Department of Bioengineering, Rice University, Houston, TX 77003 (United States)], E-mail: mmfrench@rice.edu; Athanasiou, Kyriacos A. [Department of Bioengineering, Rice University, Houston, TX 77003 (United States)], E-mail: athanasiou@rice.edu; Vago, Razi [Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer Sheva, 84105 (Israel)], E-mail: rvago@bgu.ac.il

    2008-12-01

    This study examines the suitability of marine origin coral species, Porites lutea (POR) and the hydrozoan Millepora dichotoma (MIL), for use as novel three dimensional growth matrices in the field of articular cartilage tissue engineering. Therefore, mesenchymal stem cells (MSCs) and chondrocytes were grown on the skeletal material obtained from each of these two organisms to investigate their potential use as three dimensional scaffolding for cartilage tissue growth. Chondrogenic induction of MSCs was achieved by addition of transforming growth factor-{beta}1 (TGF-{beta}1) and insulin growth factor-I (IGF-I). Cell adherence, proliferation, differentiation and tissue development were investigated through six weeks of culture. Cartilage tissue growth and chondrocytic phenotype maintenance of each cell type were examined by cell morphology, histochemical analyses, expression of collagen type II and quantitative measures of glycosaminoglycan (GAG) content. The MSCs and the chondrocytes were shown good adherence to the scaffolds and maintenance of the chondrocytic phenotype in the initial stages of culture. However after two weeks of culture on MIL and three weeks on POR these cultures began to exhibit signs of further differentiation and phenotypic loss. The shown results indicated that POR was a better substrate for chondrocytes phenotype maintenance than MIL. We believe that surface modification of POR combined with mechanical stimuli will provide a suitable environment for chondrogenic phenotype maintenance. Further investigation of POR and other novel coralline biomatrices is indicated and warranted in the field of cartilage tissue engineering applications.

  8. US-Vietnam Mil-Mil Relations: How to Elevate the Relationship

    Science.gov (United States)

    2013-03-01

    heat, yet looking surprisingly cool as he gazed across the calm lagoon of Cam Ranh Bay, and addressed the mostly civilian crew of the ship: Today I...Washington’s interest in accounting, to the fullest extent possible, for thousands of U.S. service members who remained missing in Vietnam. Leading a...Defense Cooperation; and building on lynch-pin legacy issues such as MIA, Agent Orange/dioxin remediation and demining), the U.S. should do the

  9. Proposed MIL Standard and Handbook - Flying Qualities of Air Vehicles. Volume 2. Proposed MIL Handbook

    Science.gov (United States)

    1982-11-01

    aft c.g. 1.0 1) heo, nedium , Viin to 0 ma. CO RRFFCR Chingesho 00 LO iTAI I Category C 3.4.1.1 Rel atnion in transonicI Transonic 0 SnOB )N 3.5...methods for dealing with lead/lag systems like those of Table 5; unfortunately, neither is physically very appeal - ing. And in each, there is an underlying...cable). A change in the damping ratio requirements would mean that either: a) we restrict unaugmented vehicles as well; this is not appealing 119 - -o

  10. The Use of Tomosynthesis in the Global Study of Knee Subchondral Insufficiency Fractures.

    Science.gov (United States)

    Nelson, Fred; Bokhari, Omaima; Oravec, Daniel; Kim, Woong; Flynn, Michael; Lumley, Catherine; McPhilamy, Austin; Yeni, Yener N

    2017-02-01

    Subchondral insufficiency fractures (SIF), previously termed spontaneous osteonecrosis of the knee, are marked by a sudden onset of severe pain. Other than the size of the lesion, prediction for progression to joint replacement is difficult. The objective was to determine if quantitative analysis of bone texture using digital tomosynthesis imaging would be useful in predicting more rapid progression to joint replacement. Tomosynthesis studies of 30 knees with documented SIF were quantified by fractal, mean intercept length (MIL), and line fraction deviation analyses. Fractal dimension, lacunarity, MIL, and line fraction deviation variables measured from these analyses were then correlated to short interval progression to joint replacement surgery. Higher odds for joint replacement were related to higher values of the standard deviation of slope lacunarity and to morphometric measures (eg, MIL). Using digital tomosynthesis images for bone texture assessment may help distinguish condylar bone response in SIF, potentially acting as a clinically relevant predictive tool. In the future, contrasting SIF to the more gradual long-term process of osteoarthritis, there may be a better understanding of the different mechanisms for the two conditions. Copyright © 2017 The Association of University Radiologists. Published by Elsevier Inc. All rights reserved.

  11. Sustentabilidade na região metropolitana do Cariri – RMC: análise a partir dos objetivos de desenvolvimento do milênio – ODMs / Sustainability in the Cariri metropolitan region: analysis from the millennium development goals – MDGs

    Directory of Open Access Journals (Sweden)

    Diego Coelho do Nascimento

    2016-12-01

    Full Text Available A Região Metropolitana do Cariri - RMC criada pela Lei Complementar Nº 78 de 2009, localiza-se ao Sul do estado do Ceará no Nordeste brasileiro e é constituída pelos municípios de Juazeiro do Norte, Crato, Barbalha, Jardim, Missão Velha, Caririaçu, Farias Brito, Nova Olinda e Santana do Cariri. A região atravessa uma acentuada fase de crescimento econômico e demográfico, e, consequentemente, de mudanças sociais e ambientais. O objetivo geral dessa pesquisa foi o de identificar o panorama da Região Metropolitana do Cariri no que diz respeito às dimensões componentes do desenvolvimento sustentável a partir da análise dos Objetivos de Desenvolvimento do Milênio na esfera municipal. A pesquisa possui foco quali-quantitativo, constituindo-se em um Estudo de Caso realizado por meio de pesquisa bibliográfica e documental. A coleta de dados se realizou por meio da análise dos Objetivos de Desenvolvimento do Milênio no âmbito dos municípios da RMC. Por meio da análise dos resultados, notou-se que a prosperidade econômica nessa região (sobretudo, no CRAJUBAR contrasta com a vulnerabilidade social e ambiental, produzindo um ambiente insustentável a médio e longo prazo.

  12. Development of a new, rapid and sensitive HPTLC method for estimation of Milnacipran in bulk, formulation and compatibility study

    Directory of Open Access Journals (Sweden)

    Gautam Singhvi

    2017-05-01

    Full Text Available A simple, sensitive and rapid high performance thin layer chromatographic (HPTLC method has been developed and validated for quantitative determination of Milnacipran Hydrochloride (MIL in bulk and formulations. The chromatographic development was carried out on HPTLC plates precoated with silica gel 60 F254 using a mixture of acetonitrile, water and ammonia (6:0.6:1.6 (v/v/v as mobile phase. Detection was carried out densitometrically at 220 nm. The Rf value of drug was found to be 0.63 ± 0.02. The method was validated as per ICH guideline with respect to linearity, accuracy, precision, robustness etc. The calibration curve was found to be linear over a range of 100–1000 ng μL−1 with a regression coefficient of 0.999. The accuracy was found to be very high (99.12–100.87%. %RSD values for intra-day and inter-day variation were not more than 1.43. The method has demonstrated high sensitivity and specificity. The method was applied for compatibility studies also. The method is new, simple and economic for routine estimation of MIL in bulk, preformulation studies and pharmaceutical formulation to help the industries as well as researchers for their sensitive determination of MIL rapidly at low cost in routine analysis.

  13. 78 FR 73852 - Army Science Board Winter Plenary Meeting

    Science.gov (United States)

    2013-12-09

    ... Board to review the results of the FY13 study titled, ``Creating an Innovation Culture in the Army'' in... the Fiscal Year 2013 ``Creating an Innovation Culture'' Study. The ASB board members will cast a vote....mil @mail.mil"> william.m.mclagan.mil @mail.mil or Ms. Carolyn German at (703) 545-8654 or email...

  14. O tema movimentos sociais nos espaços de divulgação e socialização do conhecimento no serviço social na primeira década do milênio = The theme of social movements in the areas of disclosure and socialization of knowledge in social work in the first decade of the millennium

    Directory of Open Access Journals (Sweden)

    Ribeiro, Edaléa Maria

    2011-01-01

    Full Text Available O presente trabalho é resultado final da pesquisa realizada junto ao grupo de pesquisa MOSCOPSS – Movimentos Sociais Contemporâneos, Políticas Sociais Setoriais e Serviço Social – do Departamento de Serviço Social da UFSC. Apresenta o resultado quantiqualitativo quanto à presença da temática movimentos sociais nos primeiros dez anos do milênio em trabalhos publicados nos eventos promovidos pela categoria profissional no Brasil: os Congressos Brasileiros de Assistentes Sociais (CBAS e os Encontros Nacionais de Pesquisa em Serviço Social (ENPESS. Os dados coletados permitem afirmar que o tema não desapareceu por completo nesses espaços de socialização do conhecimento no Serviço Social, ainda que a profissão tenha tido um distanciamento profundo em relação ao mesmo, fruto das referencias teóricas que orientaram as reflexões do tema na profissão

  15. Meaning in life and intuition.

    Science.gov (United States)

    Heintzelman, Samantha J; King, Laura A

    2016-03-01

    Three correlational studies and 2 experiments examined the association between meaning in life (MIL) and reliance on intuitive information processing. In Studies 1-3 (total N = 5,079), Faith in Intuition (FI) scale and MIL were correlated positively, controlling for religiosity, positive mood, self-esteem, basic need satisfaction, and need for cognition. Two experiments manipulated processing style. In Study 4 (N = 614), participants were randomly assigned to complete the Cognitive Reflection Task (CRT; Fredrick, 2005) either immediately before (reflective/low intuitive mindset condition) or immediately after (control condition) rating MIL. Condition did not affect MIL. However, low MIL rated before the CRT predicted superior performance and greater time spent on the task. The association between reflection and MIL was curvilinear, such that MIL was strongly negatively related to CRT performance particularly at low levels of MIL. In Study 5 (N = 804), intuitive or reflective mindsets were induced and FI and MIL were measured. Induced processing style study did not affect MIL. However, those high in MIL were more responsive to the intuitive mindset induction. The relationship between FI and MIL was curvilinear (in this and the correlational studies), with intuitive processing being strongly positively related to MIL particularly at higher levels of MIL. Although often considered in the context of conscious reflection, MIL shares a positive relationship with reliance on gut feelings, and high MIL may facilitate reliance on those feelings. (PsycINFO Database Record (c) 2016 APA, all rights reserved).

  16. Molecular basis of a high affinity murine interleukin-5 receptor.

    OpenAIRE

    Devos, R; Plaetinck, G; Van der Heyden, J; Cornelis, S; Vandekerckhove, J; Fiers, W; Tavernier, J

    1991-01-01

    The mouse interleukin-5 receptor (mIL-5R) consists of two components one of which, the mIL-5R alpha-chain, binds mIL-5 with low affinity. Recently we demonstrated that monoclonal antibodies (Mabs) recognizing the second mIL-5R beta-chain, immunoprecipitate a p130-140 protein doublet which corresponds to the mIL-3R and the mIL-3R-like protein, the latter chain for which so far no ligand has been identified. In this study we show that a high affinity mIL-5R can be reconstituted on COS1 cells by...

  17. Numerical Model Study of the Tuscarawas River below Dover Dam, Ohio

    Science.gov (United States)

    2009-09-01

    chl.erdc.usace.army.mil/sms). Cross-sections from a ERDC/CHL TR-09-17 7 HEC - RAS model provided by the district, along with aerial photographs for proper alignment...ER D C/ CH L TR -0 9 -1 7 Numerical Model Study of the Tuscarawas River below Dover Dam, Ohio Richard L. Stockstill and Jane M. Vaughan...September 2009 C oa st al a n d H yd ra u lic s La b or at or y Approved for public release; distribution is unlimited. ERDC/CHL TR-09

  18. Práticas de gestão do conhecimento em grupos de pesquisa da rede Instituto Fábrica do Milênio Knowledge management practices in research groups of the factory of the millennium (IFM network

    Directory of Open Access Journals (Sweden)

    Karina Kühl de Lima

    2008-08-01

    Full Text Available Nos últimos anos houve um crescimento dos programas de pesquisa em rede, em que diferentes grupos de pesquisa reúnem competências em busca de avanços tecnológicos significativos. A gestão do conhecimento (GC é um aspecto fundamental nessas iniciativas. Este trabalho descreve as práticas de GC em grupos de pesquisa membros de uma rede de âmbito nacional, o IFM. Identifica melhores práticas e discute desafios para a sua implantação. Empregou-se o estudo de casos múltiplos, por meio de entrevistas em profundidade, aplicadas a uma amostra de grupos de pesquisa da rede. Como resultado, apresenta-se um modelo de processo de desenvolvimento de pesquisa, um modelo teórico de práticas de GC em grupos de pesquisa, a lista de melhores práticas de GC identificadas e os desafios enfrentados pelos grupos na introdução das práticas. O resultado indica o uso de poucas práticas sistematizadas e predomínio da conversão do tipo socialização (tácito-tácito. Indica, portanto, que há potencial para o desenvolvimento de metodologias e ferramentas de GC voltadas especificamente para essa classe de organizações.Recent years have seen a growth in network research programs, with different distinct research groups bringing together competencies in their search for significant technological advances. Knowledge Management (KM is an essential factor in these initiatives, but there are few studies about this theme. This paper describes KM practices in research groups of a Brazilian national research network called the Factory of the Millennium Institute (IFM. The research method adopted here was a multicase study, using interviews, applied to a sample of research groups of this network. The result was a conceptual research process development model, a theoretical model of best KM practices and barriers observed. The data confirms the importance of knowledge management practices and a focus on the aspect of socialization of knowledge conversion

  19. Monitoring Millennium Development Goals in Brazilian municipalities: challenges to be met in facing up to iniquities Monitorando Objetivos de Desenvolvimento do Milênio em municípios brasileiros: desafios ao enfrentamento das iniquidades

    Directory of Open Access Journals (Sweden)

    Marcia Faria Westphal

    2011-01-01

    Full Text Available The Healthy Cities and Agenda 21 programs improve living and health conditions and affect social and economic determinants of health. The Millennium Development Goals (MDG indicators can be used to assess the impact of social agendas. A data search was carried out for the period 1997 to 2006 to obtain 48 indicators proposed by the United Nations and a further 74 proposed by the technical group for the MDGin Brazil. There is a scarcity of studies concerned with assessing the MDG at the municipal level. Data from Brazilian health information systems are not always consistent or accurate for municipalities. The lack of availability and reliable data led to the substitution of some indicators. The information systems did not always provide annual data; national household surveys could not be disaggregated at the municipal level and there were also modifications on conceptual definitions over time. As a result, the project created an alternative list with 29 indicators. MDG monitoring at the local community can be important to measure the performance of actions toward improvements in quality of life and social iniquities.

  20. Postdiarrheal Shiga Toxin-Mediated Hemolytic Uremic Syndrome Similar to Septic Shock Síndrome urémico hemolítico símil shock séptico, posterior a diarrea mediada por toxina shiga

    Directory of Open Access Journals (Sweden)

    Patricia G. Valles

    2005-10-01

    Full Text Available The inflammatory response of host endothelial cells is included in the development of vascular damage observed in enterohemorrhagic Escherichia coli (EHEC infection, resulting in hemolytic uremic syndrome (HUS. The response to a non-conventional treatment for a group of D+ HUS (diarrhea positive HUS patients, with clinical hemodynamic parameters of septic shock was evaluated in this prospective study (1999-2003. Twelve children 2.8 ± 0.6 years old, with D+ HUS produced by E. coli infection with serological evidence of Shiga toxin, presenting severe unstable hemodynamic parameters and neurological dysfunction at onset, were studied. The protocol included fresh frozen plasma infusions, methylprednisolone pulses (10mg/k/day for three consecutive days and plasma exchange for five days, starting after admission to the intensive care unit (ICU. The twelve patients with increased pediatric risk of mortality (PRISM score: 18 ± 2 after admission to intensive care unit (ICU, required dialysis for 17.4 ± 4 days, mechanical ventilator assistance for 10 ± 1 days and early inotropic drugs support for 10.5 ± 1 days. Neurological dysfunction included generalized tonic-clonic seizures lasting for 5.4 ± 1 days, n:8. Focal seizures were present in the remaining patients. Dilated cardiomyopathy was present in 6 children. Eight children suffered hemorrhagic colitis. Nine patients survived. Within one year of the injury, neurological sequelae, Glasgow outcome scale (GOS 3 and 4, were present in two patients, chronic renal failure in one patient. We suggest that early introduction of this protocol could benefit D+ HUS patients with hemodynamic instability and neurological dysfunction at onset. Further studies are likely to elucidate the mechanisms involved in this early adverse clinical presentation of D+ HUS patients.La respuesta inflamatoria de la célula endotelial se incluye en el desarrollo del daño vascular observado en la infección por Escherichia coli

  1. Cache Hardware Approaches to Multiple Independent Levels of Security (MILS)

    Science.gov (United States)

    2012-10-01

    point-to-point interconnect for multicore processors. From [6] ..... 6 Figure 4 - State Diagram showing transitions to and from SMM ...separate mode of operation, called System Management Mode ( SMM ). This mode is in addition to the more commonly known x86 modes – Real Mode and Protected...of the SMM . A possible security exploit was uncovered with SMM , and is described in the section on Task 2. Task 3 took significantly extra time, as

  2. Military Nursing Outcomes Database (MilNOD IV): Analysis & Expansion

    Science.gov (United States)

    2011-03-29

    transferring to or from another unit (Fralic, 2000). The ADT Index is a pragmatic and easily understood way to reflect the stress and strain on nursing ...and patient mortality, nurse burnout , and job dissatisfaction. Journal of the American Medical Association, 288, 1897-1993. Aiken, L.H., Clarke...innovations in AIDS care on burnout among urban hospital nurses . Work and Occupations, 24(4), 453- 477. Aiken, L.H., Sloane, D.M., & Klocinski, J.L

  3. DefenseLink.mil - Special Report - Military Integration

    Science.gov (United States)

    Commemorates 60 Years Of Armed Forces Integration WASHINGTON, Aug. 6, 2008 – Marking the 60th anniversary of the integration of the armed services is a reminder of "how far we've come toward living up to , Aug. 6, 2008 - As the Defense Department commemorated 60 years of integration, President Harry S

  4. Quintín Lame: mil batallas contra el olvido

    Directory of Open Access Journals (Sweden)

    Luz Ángela Núnez Espinel

    2008-01-01

    Full Text Available Este artículo pretende incentivar y aportar al debate contemporáneo sobre los usos políticos de la memoria, específicamente en el caso del líder indígena Manuel Quintín Lame. La hipótesis es que inducir al olvido o recordar la figura de Lame ha sido un episodio central en la lucha política de diversos actores sociales por definir el lugar presente y futuro de los indígenas en el país. La primera parte del texto presenta el papel de Lame entre los indígenas del Cauca y el Tolima, así como las estrategias utilizadas para proscribirlo y condenarlo al olvido. La segunda parte se circunscribe al periodo 1970-1996, para analizar proceso de recuperación y apropiación de la memoria del líder por la comunidad nasa.

  5. Päev, mil sa midagi ei ostnud / Aet Annist

    Index Scriptorium Estoniae

    Annist, Aet

    1999-01-01

    Kuus aastat on Kalle Lasni juhitud organisatsiooni Media Foundations, teinud tarbimisvastast reklaami ja kutsunud tähistama 26. nov.-t ostuvaba päevana. Algselt ameerika ostjaskonnale suunatud üleskutse on jõudnud ülejäänud tarbimisühiskondadeni. Ajakirjast 'Ethical Consumerism', mis kogub kirjeldusi Täiesti Mittevajalikest Asjust (TYNKYNS) ning lisab sapiseid soovitusi nende omandajatele

  6. Calibration factors for three MILS hydrophones near Ascension Island

    International Nuclear Information System (INIS)

    Harben, P.E.; Blackman, D.K.; Rodgers, A.J.; Turpin, C.; Hollfelder, J.R.

    2000-01-01

    An airgun survey was conducted in the waters around Ascension Island during May 1999 by the British oceanographic research vessel J.C. Ross. The purposes of the survey were to calibrate and locate three existing hydrophone systems, to measure acoustic coupling and subsequent seismic propagation on a volcanic island and tomographically image the crustal structure of the volcanic edifice. The calibrations and locations were conducted on three hydrophones currently in use by the Prototype International Data Center (PIDC) and the National Data Center (NDC): ASC23, ASC24, and ASC26. The hydrophones were installed in 1957 with calibrations that were either lost, never provided or altered in the course of time. A Scripps-calibrated hydrophone moored at 925 meters depth was used to record the waveforms from a 1000 cubic inch airgun to determine the airgun source function and validate reproducibility of the source. The source function for the airgun was determined using the direct phase recordings and was found to be 751 kPa at 1 meter, consistent with manufacturer specifications. Because all three Ascension hydrophones are located near the ocean floor, it was not possible to simply deconvolve the measured source function from the signals measured to determine the hydrophone monitoring system amplitude and phase response. The direct arrival phase at the hydrophones is contaminated by nearly time-coincident bottom reflections and scattering (and to a lesser extent by Stoneley waves). The airgun shots closest to the Ascension hydrophones resulted in clipped signals, allowing us to determine clip levels in raw digitizer counts and the maximum peak-to-peak signal level in counts that corresponded to linear behavior. The peak-to-peak amplitude of the Scripps-calibrated hydrophone was corrected for range and directivity effects due to reflections off the free surface at each airgun shot in the direct arrival linear analysis interval. A conversion factor from counts to pressure in Pascals was determined for each shot and the factors averaged for each hydrophone. The results are summarized. (author)

  7. DefenseLink.mil - Special Report - Cancer Awareness

    Science.gov (United States)

    . I'd always been pretty healthy -- never a broken bone or day in the hospital. I wasn't sick. I had no raced through my mind. I had to call my family. I had to call the office. I had to make doctor's parts of my body. A Second Blow As if things weren't bad enough, I soon found out how much worse they

  8. De refranes y cantares tiene el pueblo mil millares

    Directory of Open Access Journals (Sweden)

    Laura Alfonso Soler

    2012-08-01

    Full Text Available Esta experiencia trata de acercarnos a la palabra para mejorar las competencias comunicativas orales y escritas de los nuevos hablantes de nuestro idioma. El uso de los refranes se incluye en el ámbito del nivel popular; en él abunda la subjetividad, se economizan considerablemente los medios lingüísticos y aparecen numerosas apelaciones al oyente. Relativo a esto podemos señalar que los proverbios y refranes son expresiones de contenido moral y didáctico que se transmiten de manera oral.

  9. DefenseLink.mil - Special Report - Beirut Barracks Bombing

    Science.gov (United States)

    President Ronald Reagan's speech at the Baptist Fundamentalists' Annual Convention President Ronald Reagan's of all members of the United States military who are protecting Americans and promoting freedom and Site Freedom of Information Privacy & Security External Link Disclaimer Web Policy Contact Us No

  10. De refranes y cantares tiene el pueblo mil millares

    Directory of Open Access Journals (Sweden)

    Laura Alfonso Soler

    2010-01-01

    Full Text Available Esta experiencia trata de acercarnos a la palabra para mejorar las competencias comunicativas orales y escritas de los nuevos hablantes de nuestro idioma. El uso de los refranes se incluye en el ámbito del nivel popular; en él abunda la subjetividad, se economizan considerablemente los medios lingüísticos y aparecen numerosas apelaciones al oyente. Relativo a esto podemos señalar que los proverbios y refranes son expresiones de contenido moral y didáctico que se transmiten de manera oral.

  11. On aeg, mil vajame enam leiba kui lilli / Ants Juske

    Index Scriptorium Estoniae

    Juske, Ants, 1956-2016

    2009-01-01

    Marge Monko isikunäitus "Leib ja lilled" Tallinnas Draakoni Galeriis 21. märtsini. Eksponeeritud fotod ja video "Nora õed". Kunstnik on majanduses ja tööhõives asetleidvaid muutusi uurides aluseks võtnud Narva Kreenholmi Manufaktuuri näited

  12. Päev, mil muutus maailm / Paul A. Goble

    Index Scriptorium Estoniae

    Goble, Paul Alan, 1949-

    2006-01-01

    Autor analüüsib terrorirünnakute toimepanekut viis aastat tagasi USA-s. Tema hinnangul olid need geniaalselt kavandatud, kuid bin Laden ei saavutanud nendega nii kiiret mõju, kui oli lootnud. Bin Ladeni kolm eksimust

  13. Päev, mil muutus Eesti saatus / Mart Laar

    Index Scriptorium Estoniae

    Laar, Mart, 1960-

    2009-01-01

    8. juuli 1709. aastal tominud Poltaava lahingust, mis on olulise tähtsusega ka Eesti ajaloos. See lahing tingis Rootsi suurvõimu languse ja viis Eesti kahesajaks aastaks Venemaa impeeriumi koosseisu.

  14. Dictionary: Papago/Pima--English, English--Papago/Pima = O'othham--Mil-gahn, Mil-gahn--O'othham.

    Science.gov (United States)

    Saxton, Dean; And Others

    Useful for both linguists and laymen because of its scientific validity and accuracy, the second edition of the Papago/Pima-English dictionary gives full definitions for over 5,000 entries. Beginning with a practical alphabet for Papago-Pima and a guide to the dictionary, the book is divided into two parts. In addition to the lexical entries, Part…

  15. Efeitos da precipitação pluvial, da umidade relativa do ar e de excesso e déficit hídrico do solo no peso do hectolitro, no peso de mil grãos e no rendimento de grãos de trigo Effects of rainfall, relative humidity and water excess and deficit on test weight, thousand kernel weight, and grain yield of wheat

    Directory of Open Access Journals (Sweden)

    Eliana Maria Guarienti

    2005-09-01

    Full Text Available Cerca de 90% da produção de trigo no Brasil está localizada nos estados do Paraná, do Rio Grande do Sul e de Santa Catarina. Nesses estados, a variabilidade climática é muito expressiva, tornando a produção tritícola uma atividade de risco e fazendo com que o decréscimo da produção e da produtividade de trigo seja objeto de questionamento de grande número de investigadores. Este trabalho teve por objetivo verificar a influência da precipitação pluvial, da umidade relativa do ar e de excesso e déficit hídrico do solo no peso do hectolitro, peso de mil grãos e rendimento de grãos. Foram usados dados de experimentos com a cultivar de trigo Embrapa 16, conduzidos durante os anos de 1990 a 1998, em sete locais do Rio Grande do Sul e em quatro locais de Santa Catarina. A análise estatística realizada foi correlação múltipla. Verificou-se que: a a precipitação pluvial e o excesso hídrico do solo afetaram negativamente o peso do hectolitro, peso de mil grãos e rendimento de grãos, e a umidade relativa do ar influenciou tanto positiva quanto negativamente essas variáveis; b o déficit hídrico do solo afetou positivamente o peso do hectolitro, peso de mil grãos e rendimento de grãos após a maturação fisiológica, isto é, nos dez primeiros dias anteriores à colheita, e negativamente nos demais períodos.About 90% of the wheat production in Brazil is located in Paraná, Rio Grande do Sul and Santa Catarina states. In these states there is a considerable climatic variability and consequently wheat production becomes a risky activity. Therefore, the decrease of wheat production and grain yield has been analyzed by a great number of investigators. This work aimed to verify the influence of rainfall, relative humidity, and water excess and deficit on test weight, thousand kernel weight, and grain yield of wheat. Data of Embrapa 16 wheat cultivar, obtained during the 1990-98 period, in seven Rio Grande do Sul state

  16. Four Channel Mini Wire Chamber to Study Cosmic Rays

    Science.gov (United States)

    Felix, J.; Rodriguez, G. J.

    2018-01-01

    Multiwire proportional chamber is a conventional technique to study radiation in general, and cosmic rays in particular. To study cosmic rays, it was planned, designed, constructed, characterized, and tested a four channel mini wire chamber, based on two 3 cm × 3 cm × 0.6 cm Aluminum frames, two 3 cm × 3 cm × 0.6 cm plastic frames, two 3 cm × 3 cm × 0.3 cm Aluminum frames, two electronic planes each with two Tungsten Gold plated 1 mil diameter wires, parallel and 1 cm apart each other at 25 g stretched-each plane was 90° rotated each other in the final assemble- and two Aluminum foil window to define the gas volume; it was operated with Argon 90%-CH4 10% gas mixture at 1 atmosphere and ambient temperature (20°C in the average). It is presented technical details, results on characterization, and preliminary results on cosmic rays detection.

  17. Evaluation of atrophy of foot muscles in diabetic neuropathy -- a comparative study of nerve conduction studies and ultrasonography

    DEFF Research Database (Denmark)

    Severinsen, Kaare; Andersen, Henning

    2007-01-01

    OBJECTIVE: To evaluate the relation between the findings at nerve conduction studies and the size of small foot muscles determined by ultrasonography. METHODS: In 26 diabetic patients the size of the extensor digitorum brevis muscle (EDB) and of the muscles between the first and second metatarsal...... related to the size of the small foot muscles as determined by ultrasonography. SIGNIFICANCE: In diabetic patients motor nerve conduction studies can reliably determine the size of small foot muscles. Udgivelsesdato: 2007-Oct....... RESULTS: Seventeen patients fulfilled the criteria for diabetic neuropathy. The cross-sectional area of the EDB muscle and the thickness of the MIL muscle were 116 +/- 65 mm2 and 29.6 +/- 8.2 mm, respectively. Close relations were established between muscle size and the amplitude of the CMAP...

  18. Fe-based MOFs for efficient adsorption and degradation of acid orange 7 in aqueous solution via persulfate activation

    International Nuclear Information System (INIS)

    Li, Xianghui; Guo, Weilin; Liu, Zhonghua; Wang, Ruiqin; Liu, Hua

    2016-01-01

    Graphical abstract: - Highlights: • Fe-based MILs were prepared via the facile solvothermal method. • MILs showed efficient removal rate through adsorption and degradation processes. • A possible catalytic degradation mechanism is proposed. - Abstract: Fe-based metal–organic frameworks (MOFs) including MIL-101(Fe), MIL-100(Fe), MIL-53(Fe), and MIL-88B(Fe) prepared via a facile solvothermal process were introduced as both adsorbents and catalysts to generate powerful radicals from persulfate for acid orange 7 (AO7) removal in aqueous solution. Various catalysts were described and characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy and X-ray photoelectron spectra. Because of the high specific surface area of the materials, we studied the adsorption isotherms of the four MILs by the fitting of Langmuir adsorption isotherm. Meanwhile, the catalytic activities in persulfate oxidation system were investigated. The results showed that the sequence of the materials ability in the combination of adsorption and degradation was MIL-101(Fe) > MIL-100(Fe) > MIL-53(Fe) > MIL-88B(Fe), which had a close connection with the activity of metal ion in active site of the catalysts and their different cages in size. Moreover, the reactive species in MILs/persulfate system were identified as sulfate radicals and hydroxyl radicals. The reaction mechanism for persulfate activation over MILs was also studied.

  19. Adsorptive Removal of Artificial Sweeteners from Water Using Metal-Organic Frameworks Functionalized with Urea or Melamine.

    Science.gov (United States)

    Seo, Pill Won; Khan, Nazmul Abedin; Hasan, Zubair; Jhung, Sung Hwa

    2016-11-02

    A highly porous metal-organic framework (MOF), MIL-101, was modified to introduce urea or melamine via grafting on open metal sites of the MOF. Adsorptive removal of three artificial sweeteners (ASWs) was studied using the MOFs, with or without modifications (including nitration), and activated carbon (AC). The adsorbed quantities (based on the weight of the adsorbent) of saccharin (SAC) under various conditions decreased in the order urea-MIL-101 > melamine-MIL-101 > MIL-101 > AC > O 2 N-MIL-101; however, the quantities based on unit surface area are in the order melamine-MIL-101 > urea-MIL-101 > MIL-101 > O 2 N-MIL-101. Similar ASWs [acesulfame (ACE) and cyclamate (CYC)] showed the same tendency. The mechanism for very favorable adsorption of SAC, ACE, and CYC over urea- and melamine-MIL-101 could be explained by H-bonding on the basis of the contents of -NH 2 groups on the MOFs and the adsorption results under a wide range of pH values. Moreover, the direction of H-bonding could be clearly defined (H acceptor: ASWs; H donor: MOFs). Urea-MIL-101 and melamine-MIL-101 could be suggested as competitive adsorbents for organic contaminants (such as ASWs) with electronegative atoms, considering their high adsorption capacity (for example, urea-MIL-101 had 2.3 times the SAC adsorption of AC) and ready regeneration.

  20. Isolation of methanotrophic bacteria from a london landfill: a preliminary study using molecular and stable isotopic techniques.

    Science.gov (United States)

    Sriskantharajah, S.; Cutting, S.; Lowry, D.; Grassineau, N.; Nisbet, E.

    2003-04-01

    Methane emissions from landfills are an important source of European greenhouse emissions, and could be reduced by a biological management program that used methanotrophs in landfill cover soils. Topsoil samples taken from a London Landfill were incubated on Nitrate Mineral Salts medium in the presence of methane. The resulting colonies were probed for methanotrophic DNA using PCR amplification. DNA from methanotroph positive colonies was cloned and sequenced for identification. Isolates belonging to the genera Methylocaldum, Methylomonas and Methylosinus were detected. Phylogenetic analysis suggests the presence of possible new species. In addition dried samples of the isolates were analysed for their stable carbon isotope (δ 13C) composition. The results were δ 13C values of -27 per mil and -25 per mil for Methylomonas isolates, -35 per mil and -44 per mil for Methylosinus isolates, -58 per mil and -60 per mil for some of the Methylocaldum isolates and -35 per mil and -45 per mil for the others. This isotopic variation is reflected in a phylogenetic tree of the isolates. The differences shown in the δ 13C analysis could be due to differing biochemical properties, and if the technique is further developed, it may be used for rapid identification of bacteria useful in landfill management for reducing methane emissions. The results suggest that useful reductions in methane emissions could be achieved by a careful design of landfill cover to culture methanotrophs.

  1. Study

    Directory of Open Access Journals (Sweden)

    Erum Zahir

    2017-05-01

    Full Text Available Physicochemical properties like density, viscosity, boiling point, saponification value (SV, iodine value (IV,and peroxide value (PV of Corn and Mustard oils were studied to evaluate the compositional quality of oils and also to investigate the effect on the use of same oil for repeated frying as it ultimately changes the physicochemical, nutritional and sensory properties of the oil. FT-IR spectroscopy was used to evaluate the degree of oxidation after heating and frying processes. Results revealed that due to the temperature change in the oil there is a notable difference in the spectral band which showed that the proportions of the fatty acids were changed. The spectra of Corn oil at the boiling point and at multiple frying times with a piece of potato showed frequencies in range of 2852.7–2926.0 cm−1 while in Mustard oil an additional peak was observed at 3633.8 cm−1 which exhibits the secondary oxidized product formation.

  2. Methodologies for extraction of dissolved inorganic carbon for stable carbon isotope studies : evaluation and alternatives

    Science.gov (United States)

    Hassan, Afifa Afifi

    1982-01-01

    The gas evolution and the strontium carbonate precipitation techniques to extract dissolved inorganic carbon (DIC) for stable carbon isotope analysis were investigated. Theoretical considerations, involving thermodynamic calculations and computer simulation pointed out several possible sources of error in delta carbon-13 measurements of the DIC and demonstrated the need for experimental evaluation of the magnitude of the error. An alternative analytical technique, equilibration with out-gassed vapor phase, is proposed. The experimental studies revealed that delta carbon-13 of the DIC extracted from a 0.01 molar NaHC03 solution by both techniques agreed within 0.1 per mil with the delta carbon-13 of the DIC extracted by the precipitation technique, and an increase of only 0.27 per mil in that extracted by the gas evolution technique. The efficiency of extraction of DIC decreased with sulfate concentration in the precipitation technique but was independent of sulfate concentration in the gas evolution technique. Both the precipitation and gas evolution technique were found to be satisfactory for extraction of DIC from different kinds of natural water for stable carbon isotope analysis, provided appropriate precautions are observed in handling the samples. For example, it was found that diffusion of atmospheric carbon dioxide does alter the delta carbon-13 of the samples contained in polyethylene bottles; filtration and drying in the air change the delta carbon-13 of the samples contained in polyethylene bottles; filtration and drying in the air change the delta carbon-13 of the precipitation technique; hot manganese dioxide purification changes the delta carbon-13 of carbon dioxide. (USGS)

  3. Evidence Study Guide. Revision (Naval Justice School)

    Science.gov (United States)

    1992-07-01

    404(b). See United States v. Thomas, 11 M.J. 388 (C.M.A. 1981) and United States v. Dawkins 2 M.J. 898 (A.C.M.R. 1976) (pre-Mil.R.Evid. cases applying...criminal activity). 1313 BODY INTRUSiONS (Key N-;i-,crs 1049 et seq) A. Genes - 1. Mil.R.Evid. 312. Certain searches, such as searches of body cavities...inflammatory. For example, the trial counsel may not assert that the members are " selfish , self-centered and are not fulfilling [their] responsibility to

  4. The Shock and Vibration Bulletin. Part 1. Welcome, Keynote Address Invited Papers MIL-STD-810D MIL-STD-810D Panel Session

    Science.gov (United States)

    1984-06-01

    computer. The testing purposes is both expensive and time failure criterion is basically the effective comsuming , making it more difficult to obtain... behavior of a structure in terms of do critical review on a science because a its normal modes. The fundamental *science is something that ia fact... behavior expressed in some simple sort of rules of living in the Garden of Eden; they characteristic, and a deflected shape of each could eat from any

  5. Decoupling of soil development and plant succession along a 60000 years chronosequence in Llaima Volcano, Chile Desacoplamiento del desarrollo del suelo y la sucesión vegetal a lo largo de una cronosecuencia de 60 mil años en el volcán Llaima, Chile

    OpenAIRE

    MARÍA-BELÉN GALLARDO; CECILIA PÉREZ; MARIELA NÚÑEZ-ÁVILA; JUAN J. ARMESTO

    2012-01-01

    Few studies have investigated the long-term evolution of nutrient limitation in ecosystems developed on volcanic soils. To approach the problem, we used "space for time substitution" to compare sites with the same state factors, except for the time elapsed since disturbance. Forests of Conguillio National Park in southern of Chile occur on volcanic soils that developed from lava flows and ash deposits of different ages originated from the activity of Llaima volcano. In this study we evaluate ...

  6. Analysis of Accuracy of Modis BRDF Product (MCD43 C6) Based on Misr Land Surface Brf Product - a Case Study of the Central Part of Northeast Asia

    Science.gov (United States)

    Li, J.; Chen, S.; Qin, W.; Murefu, M.; Wang, Y.; Yu, Y.; Zhen, Z.

    2018-04-01

    EOS/MODIS land surface Bi-directional Reflectance Distribution Function (BRDF) product (MCD43), with the latest version C6, is one of the most important operational BRDF products with global coverage. The core sub-product MCD43A1 stores 3 parameters of the RossThick-LiSparseR semi-empirical kernel-driven BRDF model. It is important for confident use of the product to evaluate the accuracy of bi-directional reflectance factor (BRF) predicted by MCD43A1 BRDF model (mBRF). A typical region in the central part of Northeast Asia is selected as the study area. The performance of MCD43A1 BRDF model is analyzed in various observation geometries and phenological phases, using Multi-angle Imaging SpectroRadiometer (MISR) land-surface reflectance factor product (MILS_BRF) as the reference data. In addition, MODIS products MCD12Q1 and MOD/MYD10A1 are used to evaluate the impacts of land cover types and snow covers on the model accuracy, respectively. The results show an overall excellent performance of MCD43A1 in representing the anisotropic reflectance of land surface, with root mean square error (RMSE) of 0.0262 and correlation coefficient (R) of 0.9537, for all available comparable samples of MILS_BRF and mBRF pairs. The model accuracy varies in different months, which is related to the phenological phases of the study area. The accuracy for pixels labelled as `snow' by MCD43 is obviously low, with RMSE/R of 0.0903/0.8401. Ephemeral snowfall events further decrease the accuracy, with RMSE/R of 0.1001/0.7715. These results provide meaningful information to MCD43 users, especially those, whose study regions are subject to phenological cycles as well as snow cover and change.

  7. CLINICAL-PATHOGENIC IMPORTANCE OF CORRELATION BETWEEN HISTOCHEMICAL INDICES OF BLOOD SYSTEM AND RHEUMATOID FACTOR IN PATIENTS WITH RHEUMATOID ARTHRITIS

    Directory of Open Access Journals (Sweden)

    A B Zborovsky

    2001-01-01

    Full Text Available Summary Relation between rheumatoid factor (RF and levels of Myeloperoxidase (MPO, Na*-K +-A TPh- ase (ATPh-ase, 5'-Nucleotidase (5 ’-NT, Succinate dehydrogenase (SDG in cells of peripheral blood of rheumatoid arthritis (RA patients was investigated. 83 RA patients were observed. The activities of MPO, ATP-ase, 5’NT, SDG in blood cells were determined by hystochemical methods. In patients having increasing MPO activity in monocytes, normal level of SDG in lymphocytes and decreasing of 5'NT in monocytes and lymphocytes increasing of RF level was noted in 3 weeks after hystochemical changes (p<0.05. Determination of MPO in monocytes was the most informative test for forecasting of immunological changes in RA. The role of macrophage system in RA is discussed.

  8. Adsorptive removal of methyl orange from aqueous solution with metal-organic frameworks, porous chromium-benzenedicarboxylates

    International Nuclear Information System (INIS)

    Haque, Enamul; Lee, Ji Eun; Jang, In Tae; Hwang, Young Kyu; Chang, Jong-San; Jegal, Jonggeon; Jhung, Sung Hwa

    2010-01-01

    Two typical highly porous metal-organic framework (MOF) materials based on chromium-benzenedicarboxylates (Cr-BDC) obtained from Material of Institute Lavoisier with special structure of MIL-101 and MIL-53 have been used for the adsorptive removal of methyl orange (MO), a harmful anionic dye, from aqueous solutions. The adsorption capacity and adsorption kinetic constant of MIL-101 are greater than those of MIL-53, showing the importance of porosity and pore size for the adsorption. The performance of MIL-101 improves with modification: the adsorption capacity and kinetic constant are in the order of MIL-101 < ethylenediamine-grafted MIL-101 < protonated ethylenediamine-grafted MIL-101 (even though the porosity and pore size are slightly decreased with grafting and further protonation). The adsorption capacity of protonated ethylenediamine-grafted MIL-101 decreases with increasing the pH of an aqueous MO solution. These results suggest that the adsorption of MO on the MOF is at least partly due to the electrostatic interaction between anionic MO and a cationic adsorbent. Adsorption of MO at various temperatures shows that the adsorption is a spontaneous and endothermic process and that the entropy increases (the driving force of the adsorption) with MO adsorption. The adsorbent MIL-101s are re-usable after sonification in water. Based on this study, MOFs can be suggested as potential re-usable adsorbents to remove anionic dyes because of their high porosity, facile modification and ready re-activation.

  9. Moving an Expeditionary Force: Three Case Studies in Afghanistan

    Science.gov (United States)

    2003-01-01

    Afghanistan,” Stars and Stripes (9 October 2001), 1 [on-line @ http:// ww2 .pstripes.osd.mil/01/oct01/ed100901f.html, accessed 19 August 2002]; Newman, 60. 228...hard to detect by radar, infrared or satellite because it flies 3 to 90 feet above the surface.314 A rudimentary comparison of USAF strategic...and Stripes, 9 October 2001 [on-line @ http:// ww2 .pstripes.osd.mil/01/oct01/ed100901f.html, accessed 19 August 2002]. Koch, Andrew, Kim Burger and

  10. ANALYSIS OF ACCURACY OF MODIS BRDF PRODUCT (MCD43 C6 BASED ON MISR LAND SURFACE BRF PRODUCT – A CASE STUDY OF THE CENTRAL PART OF NORTHEAST ASIA

    Directory of Open Access Journals (Sweden)

    J. Li

    2018-04-01

    Full Text Available EOS/MODIS land surface Bi-directional Reflectance Distribution Function (BRDF product (MCD43, with the latest version C6, is one of the most important operational BRDF products with global coverage. The core sub-product MCD43A1 stores 3 parameters of the RossThick-LiSparseR semi-empirical kernel-driven BRDF model. It is important for confident use of the product to evaluate the accuracy of bi-directional reflectance factor (BRF predicted by MCD43A1 BRDF model (mBRF. A typical region in the central part of Northeast Asia is selected as the study area. The performance of MCD43A1 BRDF model is analyzed in various observation geometries and phenological phases, using Multi-angle Imaging SpectroRadiometer (MISR land-surface reflectance factor product (MILS_BRF as the reference data. In addition, MODIS products MCD12Q1 and MOD/MYD10A1 are used to evaluate the impacts of land cover types and snow covers on the model accuracy, respectively. The results show an overall excellent performance of MCD43A1 in representing the anisotropic reflectance of land surface, with root mean square error (RMSE of 0.0262 and correlation coefficient (R of 0.9537, for all available comparable samples of MILS_BRF and mBRF pairs. The model accuracy varies in different months, which is related to the phenological phases of the study area. The accuracy for pixels labelled as ‘snow’ by MCD43 is obviously low, with RMSE/R of 0.0903/0.8401. Ephemeral snowfall events further decrease the accuracy, with RMSE/R of 0.1001/0.7715. These results provide meaningful information to MCD43 users, especially those, whose study regions are subject to phenological cycles as well as snow cover and change.

  11. Espectadores del dolor ajeno: una imagen no vale más que mil palabras

    Directory of Open Access Journals (Sweden)

    Imanol Zubero Beascoechea

    2016-07-01

    Full Text Available This work is intended to be an updated review of one of the most debated issues in the field of the sociology of communication: the relationship between mediated knowledge and social action. Taking the apparent evolution of the thought of Susan Sontag on this matter as its axis, the article reflects on the limits and the potentialities of images, particularly those transmitted by the mass media, to put us in the place of the other. It proposes a trans-disciplinary approach, turning to analyses and proposals drawn from sociology, communication sciences, artistic creation, etc. The article ends by vindicating the value of the image as a rupture of normality and, therefore, as a mobilizer of ethical sentiment.

  12. Effect of Co3O4 addition on densification of 8 mil% Yttria stabilized zirconia

    International Nuclear Information System (INIS)

    Grilo, J.P.F.; Neto, P.P.B.; Souza, G.L.; Macedo, D.A.; Paskocimas, C.A.; Nascimento, R.M.

    2012-01-01

    8 mol% Yttria stabilized zirconia (8YSZ) is the most common material used as electrolyte in solid oxide fuel cells (SOFC). In recent years, many research efforts have been focused on trying to reduce its sintering temperature with a view of the possibility of co-sintering of the anode/electrolyte interface. In this context, the use of sintering aids is a major technological routes used to enhance the densification of YSZ. In this work, Co 3 O 4 powders obtained by the Pechini method were used as sintering aids for 8YSZ. The effect of the addition of Co 3 O 4' (between 0.075 and 1 wt.%) in the densification of 8YSZ was investigated by X-ray diffraction, electron microscopy and density measurements. The results indicated that the optimum temperature sintering decreases with increasing content of Co 3 O 4 . The best content of the sintering aid was 0.25 wt.%, for this content was obtained value of relative density above 90% after sintering at temperatures as low as 1350 deg C. (author)

  13. p Mil prepar k clott ation f ting an from P nd prot Pedioco pr teolytic ...

    African Journals Online (AJOL)

    SAM

    reasons, vegetarianism diet or consumer concern regarding genetically engineered foods as in Germany, .... adjusted to the set pH with 0.1 N NaOH or 0.1 M HCl with fast stirring. ..... similar behavior was reported for the crude extract from.

  14. Endurance Pump Test with MIL-PRF-83282 Hydraulic Fluid, Purified with Malabar Purifier

    National Research Council Canada - National Science Library

    Sharma, Shashi

    2004-01-01

    .... Endurance aircraft hydraulic pump tests under carefully controlled conditions were previously conducted using hydraulic fluid purified with a rotating-disk and vacuum type purifier, the portable...

  15. Más de mil jóvenes inician emprendimientos productivos.

    OpenAIRE

    Programa Seamos Productivos; Ministerio de Educación

    2014-01-01

    El Programa “Seamos Productivos” es un esfuerzo del Viceministerio de Ciencia y Tecnología por generar oportunidades de empleo y auto empleo a la población de bachilleres y técnicos del Nivel Superior, por medio de la Asociatividad Cooperativa y la práctica de valores, que les permita la inserción en el mundo productivo, la inclusión social y el desarrollo personal, familiar y de sus comunidades.

  16. Navy Manager’s Guide for the Test and Evaluation Sections of MIL-H-46855.

    Science.gov (United States)

    1977-06-30

    guidance and contributions: CDR Paul R. Chatelier , Naval A ir systems Comaand Dr. Lloyd Hitchcock , Naval A ir Development Center Mr. Ed L. Holshouser...Paci fic Mis sile Test Center LCDR William F. Moroney , Pac ifi c Mi ss i le Test Cente r W ithin the Boeing Aerospace Company , the program was...Reference 11). This standard presents HE design criteria, principles , and practices to be appl i ed in the design of systems, equipment and facili- ties

  17. A fantasia e o baile de máscaras do final do milênio

    Directory of Open Access Journals (Sweden)

    Claudia Cruz Lanzarin

    Full Text Available Neste trabalho, pretendo estudar um modo de uso muito específico da Internet. Chamarei aqui de relações virtuais os vínculos, mesmo que efêmeros, que se estabelecem nos chats entre sujeitos que supostamente não se conhecem fora do ciberespaço. Nestas formas de relacionamento a adoção de um pseudônimo ou mesmo a construção de uma ou mais personagens são freqüentes.Tentarei, no texto, estabelecer algumas relações entre a produção subjetiva (personagem construída e o conceito psicanalítico de fantasia.

  18. Villa de la madre y el niño – Milán

    Directory of Open Access Journals (Sweden)

    Scarzella Mazzocchi, Alberto

    1959-07-01

    Full Text Available La Villa de la Madre y el Niño marca una nueva etapa en la arquitectura italiana, ya que es el resultado de un trabajo concebido y madurado por un equipo de arquitectos, médicos y sociólogos para, así, lograr una mayor efectividad en la resolución de problemas tan complejos como son la construcción de edificios con fines sociales.

  19. A fantasia e o baile de máscaras do final do milênio

    OpenAIRE

    Lanzarin,Claudia Cruz

    2000-01-01

    Neste trabalho, pretendo estudar um modo de uso muito específico da Internet. Chamarei aqui de relações virtuais os vínculos, mesmo que efêmeros, que se estabelecem nos chats entre sujeitos que supostamente não se conhecem fora do ciberespaço. Nestas formas de relacionamento a adoção de um pseudônimo ou mesmo a construção de uma ou mais personagens são freqüentes.Tentarei, no texto, estabelecer algumas relações entre a produção subjetiva (personagem construída) e o conceito psicanalítico de f...

  20. Iglesia parroquial de Baranzate, cerca de Milán, Italia

    Directory of Open Access Journals (Sweden)

    Mangiarotti, A.

    1966-06-01

    Full Text Available This church has a lower level, containing the crypt, the baptistry, confession boxes, and a sacristy; and a higher, or normal level, with the main church for the congregation, and the presbitry. This is reached by a series of steps. Two stairs, at the ends of the building, connect the lower and higher levels. The main interest of this building is its brilliant structure: four reinforced concrete pillars and prefabricated slabs. The lightness of the lateral enclosures and the powerful plasticity of the materials used are also most impressive.La iglesia consta de dos niveles: el inferior, en donde están la cripta, el baptisterio, confesionarios, sacristía, etc.; y el nivel superior, en el que se encuentran la nave para los fieles, presbiterio, etc., y al que se accede por una escalinata. Ambos niveles están comunicados mediante dos cajas de escalera situadas en los extremos del edificio. El interés principal que presenta esta iglesia radica en su brillante estructura —4 pilares de hormigón armado, vigas y losas prefabricadas...—, en la ligereza de sus cerramientos laterales, en el carácter ambiental conseguido y en la plástica recia de los materiales empleados.

  1. Alternate Material Pallet, 40" x 48", MIL-STD-1660, Engineering Evaluation Tests

    National Research Council Canada - National Science Library

    Dugan, Jeffery

    2003-01-01

    The U.S. Army Defense Ammunition Center (DAC), Validation Engineering Division (SJMAC-DEV) conducted Engineering Evaluation Tests to determine if the Alternate Material Pallet manufactured by Hunter Paine Enterprise, Inc...

  2. cumprimento dos objetivos de desenvolvimento do milênio da onu?

    Directory of Open Access Journals (Sweden)

    Maria José de Rezende

    2007-01-01

    Full Text Available Quedó demostrado que el Informe del Desenvolvimiento Humano - IDH/2001 presenta datos que revelan las muchas formas de exclusión a que están sometidos millares de individuos en diversos continentes; sin embargo, la adopción de una perspectiva extremamente optimista acerca de la posibilidad de utilizar las nuevas tecnologías en favor del bienestar social se mostró frágil por no detenerse en los obstáculos –de democratización del acceso a esas nuevas tecnologías– constituidos por la creciente concentración de la riqueza y del poder, por un lado, y por la expansión de las desigualdades, por otro.

  3. Reliability Test and Evaluation of MIL-M-38510 Linear Microcircuits

    Science.gov (United States)

    1979-07-01

    42% higher than -IIB, and hFE of the +input transistor was 37% lower than hFE of the -input transistor, thus, the gairn difference accounted for the...2 . Because these failures were random, the excessive AuA1 2 was probably gene - rated during the wire bonding operation. 6.2 OPEN PIN DUE TO BROKEN...each part examined, hFE of Q4 was lower than that of Q3 as illustrated in Table F8-1. When baked (100 hours at 250 0C), hlFE of Q4 improved two to

  4. Breakdown of Preservative Fluid MIL-PRF-46170 in Aircraft Hydraulic Systems

    National Research Council Canada - National Science Library

    Moorman, Jeffrey

    2001-01-01

    .... Additional information obtained from outside sources is also summarized for background. Laboratory pump testing showed rapid filter dogging with small amounts of preservative fluid (MU-PRF-46l70) in the system...

  5. J. Grobbelaar, AW Lishman*, WA Botha, DJ MilIar** and SF Lesch

    African Journals Online (AJOL)

    111mof topical antiseptic (Surgispray, Novo Industries). A 50 mm x 50 mm square of adhesive plaster (Elasto- plast) was moistened with anaesthetic ether and pressed down finnly over the wound. A 50 mm wide strip of masking tape was then wound around the neck of the sheep to shield completely the point of entry into ...

  6. “Trezentas mil implicações”: possibilidades familiares em uma pesquisa sobre conjugalidade

    Directory of Open Access Journals (Sweden)

    Rafael Reis Luz

    2017-01-01

    Full Text Available http://dx.doi.org/10.5007/1807-1384.2017v14n1p152 Este artigo consiste em um recorte de minha pesquisa de Mestrado, na qual investiguei a experiência da conjugalidade homossexual a partir de entrevistas com quatro casais, tendo como referenciais teóricos os estudos queer. No presente texto, parto de recentes contribuições sobre parentesco de Marilyn Strathern (2005/2015, especialmente suas discussões sobre parentalidade e demais relações familiares, para apresentar as narrativas de um dos casais de mulheres entrevistadas e pensar os (desencontros entre certa ordem familiar instituída e novos arranjos familiares. Dentre as muitas expectativas, planos e dilemas, observamos que, no tocante à geração de filhos, são temidos os questionamentos da família de origem quanto à identificação e inclusão do genitor na rede familiar, à orientação sexual das mães etc. O discurso do casal aponta para uma complexa trama que envolve variadas possibilidades de arranjos parentais e familiares, sexualidades e afetos. Não obstante, o casal de mulheres entrevistadas parece operar sob uma reiteração subversiva: as possibilidades são discutidas e negociadas tendo a família de origem como referência legitimadora, como instituição que se autoriza a indagar seus vínculos, afetos e desejos. Nesse sentido, o casal analisado apropria-se de determinadas referências familiares porque estas dizem respeito às histórias individuais, ao mesmo tempo em que as negociam, reformulam-nas, submetem-nas às reavaliações que fazem em seu projeto de uma vida a dois ‘alternativa’.

  7. DefenseLink.mil - Special Report - Soldiers Train with Non-lethal Weapons

    Science.gov (United States)

    Spc. Yevgeniy Popov, a chemical warfare specialist with Headquarters and Headquarters Company, 3rd warfare specialist with Headquarters and Headquarters Company, 3rd Special Troops Battalion, 3rd Brigade , center, a combat engineer with Company A, 3rd Special Troops Battalion, 3rd Brigade Combat Team, 10th

  8. Ooper hetkest, mil inimene inimlikkuse kaotab / Timo Steiner ; intervjueerinud Anneli Sihvart

    Index Scriptorium Estoniae

    Steiner, Timo, 1976-

    2011-01-01

    Vestlus heliloojaga. Noblesseri valukojas Nargen Festivali raames 10. juunil esietenduvast uuest Eesti algupärasest ooperist "Kaks pead", libretist Maarja Kangro, lavastaja Mart Koldits, dirigent Tõnu Kaljuste

  9. Modulated synthesis of Cr-MOF (MIL 101) for hydrogen storage applications

    CSIR Research Space (South Africa)

    Segakweng, T

    2014-08-01

    Full Text Available as a fuel into fuel cell technologies is only possible when safe and effective hydrogen storage systems become available. Complete usage of hydrogen is only possible if proper and effective storage systems with fast kinetics becomes available. Porous...

  10. Diagnostic des systèmes de culture à base de mil [Pennisetum ...

    African Journals Online (AJOL)

    SARAH

    31 juil. 2014 ... gagné en popularité. Les producteurs qui adoptent ces pratiques recherchent de multiples avantages : optimiser la gestion des résidus de cultures; diminuer la quantité de travail; protéger les sols contre l'érosion de l'eau et du vent; diminuer les coûts d'achat des engrais, d'opération et d'entretien de la ...

  11. How Do Meaning in Life and Positive Affect Relate to Adaptation to Stress? The Case of Firefighters Following the Mount Carmel Forest Fire.

    Science.gov (United States)

    Shrira, Amit; Shmotkin, Dov; Palgi, Yuval; Soffer, Yechiel; Hamama Raz, Yaira; Tal-Katz, Patricia; Ben-Ezra, Menachem; Benight, Charles C

    2015-01-01

    We examined how positive affect (PA) and meaning in life (MIL) conjointly regulate posttraumatic stress disorder (PTSD) symptoms and perceived coping self-efficacy. Hypotheses were guided by a recent holistic model, according to which PA and MIL should compensate for each other in relating to adaptation to high stress. The sample included 75 Israeli firefighters who took active part in extinguishing the 2010 Mount Carmel forest fire. PA and MIL helped to compensate for the other, demonstrating that when one of them was low, the other related to higher adaptation. That is, under low MIL, PA related to PTSD symptoms and coping self-efficacy, and under low PA, MIL related to PTSD symptoms and coping self-efficacy. The study design was cross-sectional and therefore precluded any causal inferences. The findings lend additional support to the holistic model and help to understand how subjective well-being and MIL correlate with adaptation to stress.

  12. Identification of microRNA-like RNAs in Ophiocordyceps sinensis.

    Science.gov (United States)

    Zhang, Wen; Li, Xiaona; Ma, Lina; Urrehman, Uzair; Bao, Xilinqiqige; Zhang, Yujing; Zhang, Chen-Yu; Hou, Dongxia; Zhou, Zhen

    2018-03-27

    Ophiocordyceps sinensis is well known as a traditional Chinese medicine and has widely been used for over 2,000 years to stimulate immune system, decrease blood pressure and to inhibit tumor growth. While miRNAs are increasingly recognized for their roles in post-transcriptional regulation of gene expression in animals and plants, miRNAs in fungi were less studied until the discovery of microRNA-like RNA (milRNA). High-throughput sequencing and bioinformatics approaches were used to identify conserved and novel milRNAs in O. sinensis. 40 conserved milRNAs were identified, while 23 pre-miRNA candidates encoding 31 novel milRNAs were predicted. Furthermore, the potential target genes of milRNAs in human were predicted and gene ontology analysis was applied to these genes. Enrichment analysis of GO-represented biological process showed that target genes of both conserved and novel milRNAs are involved in development, metabolic and immune processes, indicating the potential roles of milRNAs of O. sinensis in pharmacological effects as health food and traditional Chinese medicine. This study is the first report on genome-wide analysis of milRNAs in O. sinensis and it provides a useful resource to further study the potential roles of milRNAs as active components of O. sinensis in health food or traditional Chinese medicine.

  13. In vitro selection of miltefosine resistance in promastigotes of Leishmania donovani from Nepal: genomic and metabolomic characterization.

    Science.gov (United States)

    Shaw, C D; Lonchamp, J; Downing, T; Imamura, H; Freeman, T M; Cotton, J A; Sanders, M; Blackburn, G; Dujardin, J C; Rijal, S; Khanal, B; Illingworth, C J R; Coombs, G H; Carter, K C

    2016-03-01

    In this study, we followed the genomic, lipidomic and metabolomic changes associated with the selection of miltefosine (MIL) resistance in two clinically derived Leishmania donovani strains with different inherent resistance to antimonial drugs (antimony sensitive strain Sb-S; and antimony resistant Sb-R). MIL-R was easily induced in both strains using the promastigote-stage, but a significant increase in MIL-R in the intracellular amastigote compared to the corresponding wild-type did not occur until promastigotes had adapted to 12.2 μM MIL. A variety of common and strain-specific genetic changes were discovered in MIL-adapted parasites, including deletions at the LdMT transporter gene, single-base mutations and changes in somy. The most obvious lipid changes in MIL-R promastigotes occurred to phosphatidylcholines and lysophosphatidylcholines and results indicate that the Kennedy pathway is involved in MIL resistance. The inherent Sb resistance of the parasite had an impact on the changes that occurred in MIL-R parasites, with more genetic changes occurring in Sb-R compared with Sb-S parasites. Initial interpretation of the changes identified in this study does not support synergies with Sb-R in the mechanisms of MIL resistance, though this requires an enhanced understanding of the parasite's biochemical pathways and how they are genetically regulated to be verified fully. © 2015 The Authors. Molecular Microbiology published by John Wiley & Sons Ltd.

  14. Photoreactivity of Metal-Organic Frameworks in Aqueous Solutions: Metal Dependence of Reactive Oxygen Species Production.

    Science.gov (United States)

    Liu, Kai; Gao, Yanxin; Liu, Jing; Wen, Yifan; Zhao, Yingcan; Zhang, Kunyang; Yu, Gang

    2016-04-05

    Promising applications of metal-organic frameworks (MOFs) in various fields have raised concern over their environmental fate and safety upon inevitable discharge into aqueous environments. Currently, no information regarding the transformation processes of MOFs is available. Due to the presence of repetitive π-bond structure and semiconductive property, photochemical transformations are an important fate process that affects the performance of MOFs in practical applications. In the current study, the generation of reactive oxygen species (ROS) in isoreticular MIL-53s was studied. Scavengers were employed to probe the production of (1)O2, O2(•-), and •OH, respectively. In general, MIL-53(Cr) and MIL-53(Fe) are dominated by type I and II photosensitization reactions, respectively, and MIL-53(Al) appears to be less photoreactive. The generation of ROS in MIL-53(Fe) may be underestimated due to dismutation. Further investigation of MIL-53(Fe) encapsulated diclofenac transformation revealed that diclofenac can be easily transformed by MIL-53(Fe) generated ROS. However, the cytotoxicity results implied that the ROS generated from MIL-53s have little effect on the viability of the human hepatocyte (HepG2) cell line. These results suggest that the photogeneration of ROS by MOFs may be metal-node dependent, and the application of MIL-53s as drug carriers needs to be carefully considered due to their high photoreactivity.

  15. Compendium of Operations Research and Economic Analysis Studies

    Science.gov (United States)

    1990-10-01

    Constraining buslo a mxiu f1 ot will real-ize a- near tverm’, reduction of approximiateIy .$25- mil-lion. Achieving co it er goalI rvducrtions for short er Yead...which have no potential to achieve consolidation cost effectiveness and pull these out of the bank early for shipment, and (4) that the depots allow

  16. Piloted simulator study of allowable time delays in large-airplane response

    Science.gov (United States)

    Grantham, William D.; Bert T.?aetingas, Stephen A.dings with ran; Bert T.?aetingas, Stephen A.dings with ran

    1987-01-01

    A piloted simulation was performed to determine the permissible time delay and phase shift in the flight control system of a specific large transport-type airplane. The study was conducted with a six degree of freedom ground-based simulator and a math model similar to an advanced wide-body jet transport. Time delays in discrete and lagged form were incorporated into the longitudinal, lateral, and directional control systems of the airplane. Three experienced pilots flew simulated approaches and landings with random localizer and glide slope offsets during instrument tracking as their principal evaluation task. Results of the present study suggest a level 1 (satisfactory) handling qualities limit for the effective time delay of 0.15 sec in both the pitch and roll axes, as opposed to a 0.10-sec limit of the present specification (MIL-F-8785C) for both axes. Also, the present results suggest a level 2 (acceptable but unsatisfactory) handling qualities limit for an effective time delay of 0.82 sec and 0.57 sec for the pitch and roll axes, respectively, as opposed to 0.20 sec of the present specifications for both axes. In the area of phase shift between cockpit input and control surface deflection,the results of this study, flown in turbulent air, suggest less severe phase shift limitations for the approach and landing task-approximately 50 deg. in pitch and 40 deg. in roll - as opposed to 15 deg. of the present specifications for both axes.

  17. Nano-porous inorganic-organic hybrid solids: some new materials for hydrogen storage?; Les solides hybrides inorganiques-organiques nanoporeux: de nouveaux materiaux pour le stockage de l'hydrogene?

    Energy Technology Data Exchange (ETDEWEB)

    Serre, Ch.; Loiseau, Th.; Devic, T.; Ferey, G. [Institut Lavoisier, UMR CNRS 8180, 78 - Versailles (France); Latroche, M. [Laboratoire de Chimie Metallurgique des Terres Rares (LCMTR), UPR 209, 94 - Thiais (France); Llewellyn, Ph. [Universite de Provence, Madirel, 13 - Marseille (France); Chang, J.S. [KRICT, Daejon (Korea, Republic of)

    2007-07-01

    Recently have been studied chromium and aluminium carboxylates MIL-53(Cr, Al), formed from an assembly of octahedrons chains and for hybrid solids formed with octahedrons trimers (MIL-100 and MIL-101). The compounds MIL-53(Cr, Al) are microporous ({phi} {approx} 8 Angstroms, while the solids MIL-100 and MIL-101 have very large porous volumes (V {approx} 380-700000 (Angstroms){sup 3}), meso-pores ({phi} {approx} 25-34 Angstroms) and a zeolitic architecture. The resulting specific surface areas are important (between 1000 m{sup 2}.g{sup -1} for the MIL-53 solids, until 4000 m{sup 2}.g{sup -1} for the MIL-101 compound. Here is presented their hydrogen adsorption properties, at 77 K and 298 K. The hydrogen adsorption kinetics has been tested on the MIL-53(Cr) solid at 77 K. Hydrogen adsorption micro-calorimetry experiments have been carried out on these solids between 0 and 1 bar in order to obtain data on the strongest interactions between hydrogen and the porous basic structure. (O.M.)

  18. Nano-porous inorganic-organic hybrid solids: some new materials for hydrogen storage?

    International Nuclear Information System (INIS)

    Serre, Ch.; Loiseau, Th.; Devic, T.; Ferey, G.; Latroche, M.; Llewellyn, Ph.; Chang, J.S.

    2007-01-01

    Recently have been studied chromium and aluminium carboxylates MIL-53(Cr, Al), formed from an assembly of octahedrons chains and for hybrid solids formed with octahedrons trimers (MIL-100 and MIL-101). The compounds MIL-53(Cr, Al) are microporous (φ ∼ 8 Angstroms, while the solids MIL-100 and MIL-101 have very large porous volumes (V ∼ 380-700000 (Angstroms) 3 ), meso-pores (φ ∼ 25-34 Angstroms) and a zeolitic architecture. The resulting specific surface areas are important (between 1000 m 2 .g -1 for the MIL-53 solids, until 4000 m 2 .g -1 for the MIL-101 compound. Here is presented their hydrogen adsorption properties, at 77 K and 298 K. The hydrogen adsorption kinetics has been tested on the MIL-53(Cr) solid at 77 K. Hydrogen adsorption micro-calorimetry experiments have been carried out on these solids between 0 and 1 bar in order to obtain data on the strongest interactions between hydrogen and the porous basic structure. (O.M.)

  19. [Experimental study of interleukin-12 gene vaccines in the treatment of low-load malignant lymphoma (EL4)].

    Science.gov (United States)

    Jiang, Q; Da, W; Ou, Y

    2001-11-01

    Two kinds of murine interleukin-12 (mIL-12) fusion gene vaccines were used to treat the murine low-load malignant T cell lymphoma EL4 as minimal residual disease (MRD) model. C57BL/6 synergistical mice were subcutaneously inoculated with 1 x 10(6) wild-type (wt) EL4 tumor cells as low-load lymphoma model treated with two mIL-12 gene vaccines. Package cell line PA317/12 producing mIL-12 retrovirus (RV) was used as in vivo vaccine and EL4 tumor cells transferred with mIL-12 gene as ex vivo vaccine. In both mIL-12 gene vaccine-treated groups, there was no tumor growth in 50% mice 60 days after inoculation. Nine of these no tumor growth mice were re-challenged with 5 x 10(5) wt EL4 cells, and 5 of them survived without tumors in another 60 days. All control mice died with tumors within one month after inoculation. Among those developed tumors in both vaccine-treated groups, the development of tumors was delayed, the survival period prolonged (P EL4 MRD in C57BL/6 mice.

  20. A hard X-ray study of a manganese-terpyridine catalyst in a chromium-based Metal Organic Framework

    Energy Technology Data Exchange (ETDEWEB)

    Ramsey, Alexandra V. [SLAC National Accelerator Lab., Menlo Park, CA (United States)

    2015-08-28

    Hydrogen produced from water splitting is a promising source of clean energy. However, a robust catalyst is necessary to carry out the water oxidation step of water splitting. In this study, the catalyst studied was [(terpy)Mn(μ-O)2Mn(terpy)]3+ (MnTD) synthesized in the Metal Organic Framework (MOF) MIL-101(Cr), and the method used for analysis was hard X-ray powder diffraction. The diffraction data was used to detect the presence of MOF in different catalytic stages, and lattice parameters were assigned to the samples containing MOF. Fourier maps were constructed with GSAS II to determine the contents of the MOF as preliminary studies suggested that MnTD may not be present. Results showed that MOF is present before catalysis occurs but disappears by the time 45 minutes of catalysis has ensued. Changes in the MOF’s lattice parameters and location of electron density in the Fourier maps suggest attractions between the MOF and catalyst that may lead to MOF degradation. Fourier maps also revealed limited, if any, amounts of MnTD, even before catalysis occurred. Molecular manganese oxide may be the source of the high rate of water oxidation catalysis in the studied system.

  1. Intermediate results of a one-year study of a laser spectrometer in the DOE filter test facilities

    International Nuclear Information System (INIS)

    Soderholm, S.C.; Tillery, M.I.

    1984-01-01

    A 1-year study of the model LAS-X (Particle Measuring Systems, Inc.) laser spectrometer in the Department of Energy (DOE) Filter Test Facilities (FTFs) was begun on August 1, 1983. The principal objectives of the study were to gain operational experience with the LAS-X/diluter/HP-85 particle size measurement system in the FTF environment, acquire size distribution data to quantify the consistency of the Q107 aerosol size distribution at each FTF and among FTFs, and compare the FTF test aerosols to current and proposed standards. Results of the first 9 months of the study are summarized and discussed. Major conclusions based on these data are: (1) the LAS-X system can be operated successfully in the FTF environment, (2) each FTF would require a back-up LAS-X to be able to continue filter testing during the (at least) once each year removal of a LAS-X from service for major recalibration and repair, (3) the FTF test aerosols are not monodisperse, as assumed in the military standard MIL-STD-282, and do not all meet the new DOE Nuclear Standard NE-F-3-43, which a replacement aerosol would be required to meet, (4) the test aerosol at each FTF is quite consistent over time, and (5) the test aerosols at the three FTFs differ consistently. Final conclusions and recommendations from this study will be developed after analysis of the full 12 months of data

  2. Positive affect, meaning in life, and future time perspective: an application of socioemotional selectivity theory.

    Science.gov (United States)

    Hicks, Joshua A; Trent, Jason; Davis, William E; King, Laura A

    2012-03-01

    Four studies tested the prediction that positive affect (PA) would relate more strongly to meaning in life (MIL) as a function of perceived time limitations. In Study 1 (N = 360), adults completed measures of PA and MIL. As predicted, PA related more strongly to MIL for older, compared to younger, participants. In Studies 2 and 3, adults (N = 514) indicated their current position in their life span, and rated their MIL. PA, whether naturally occurring (Study 2) or induced (Study 3), was a stronger predictor of MIL for individuals who perceived themselves as having a limited amount of time left to live. Finally, in Study 4 (N = 98) students completed a measure of PA, MIL, and future time perspective (FTP). Results showed that PA was more strongly linked to MIL for those who believed they had fewer opportunities left to pursue their goals. Overall, these findings suggest that the experience of PA becomes increasingly associated with the experience of MIL as the perception of future time becomes limited. The contribution of age related processes to judgments of well-being are discussed.

  3. Experimental and modelling studies of infiltration

    International Nuclear Information System (INIS)

    Giudici, M.

    2004-01-01

    This presentation describes a study of infiltration in the unsaturated soil with the objective of estimating the recharge to a phreatic aquifer. The study area is at the border of the city of Milan (Northern Italy), which draws water for both domestic and industrial purposes from ground water resources located beneath the urban area. The rate of water pumping from the aquifer system has been varying during the XX century, depending upon the number of inhabitants and the development of industrial activities. This caused variations with time of the depth of the water table below the ground surface and in turn some emergencies: the two most prominent episodes correspond to the middle '70s, when the water table in the city centre was about 30 m below the undisturbed natural conditions, and to the last decade, when the water table has raised at a rate of approximately 1 m/year and caused infiltrations in deep constructions (garages and building foundations, the underground railways, etc.). We have developed four ground water flow models at different scales, which share some characteristics: they are based on quasi-3D approximation (horizontal flow in the aquifers and vertical flow in the aquitards), conservative finite-differences schemes for regular grid with square cells in the horizontal plane and are implemented with proprietary computer codes. Among the problems that were studied for the development of these models, I recall some numerical problems, related to the behaviour of the phreatic aquifer under conditions of strong exploitation. Model calibration and validation for ModMil has been performed with a two-stage process, i.e., using some of the available data for model calibration and the remaining data for model validation. The application of geophysical exploration techniques, in particular seismic and geo-electrical prospecting, has been very useful to complete the data and information on the hydro-geological structure obtained from stratigraphic logs

  4. The antitumor effects of interleukin 12 gene on colon cancer in vitro

    International Nuclear Information System (INIS)

    Xing Chungen; Qian Jianxing; Zhou Liying; Chen Yiren

    2004-01-01

    Objective: To construct a Retroviral vector (GCXEXPN-mIL12) which can coexpress p35 and p40 and establish a PA317-mIL12 packaging cell system which has a sufficient expression quantity of mIL12 and a good biological activity. To observe the effects of PA317-mIL12 on the cancer cell cidal action of human peripheral lymphocyte in vitro. Methods: The full-length cDNA encoding mouse IL12 subunits p35 and p40 were amplified by polymerase chain reaction (PCR) separately. The polycistronic retroviral vector (pGCXEXPN-mIL12) was constructed in which both p35 and p40 were linked with internal ribosome entry site (IRES) from encephalomyocarditis virus and poliovirus by cohesive end ligation action. Subsequently the monophilic retrovirus packaging cell strain (PE 501) was transfected by pGCXEXPN-mIL12 with the method of electroporation. Then the packaging cells (PA317) transfected with bi-ophilic retroviral in viral supernatant were monocloned after screening with G-418 for 4 weeks. The PA317-mIL12 was generated and its virus titre was determined by NIH373. The mIL12 concentration in supernatant of PA317-mIL12 was measured by enzyme-linked immunosorbent assay (ELISA) and its biological activity measured by the method off spleen lymphocyte proliferation. The human colon adenocarcinoma cells (Lovo) were co-incubated with human peripheral blood mononuclear cells and PA317-mIL12. The killing rate of lymphocytes to Lovo was measured by MTT assay. Results: The concentration of mIL12 in the supernatant of PA317-mIL12 reached 27 ng/10 6 /48 hrs and PA317-mIL12 could promote the spleen lymphocytic proliferation just like standard mIL12. The study also showed that the cell-mediated cytotoxicity of lymphocyte was enhanced by PA317-mIL12. The MTT result of experiment group was significantly differ from that of control group (P<0.05). Conclusion: The mIL12 gene transfer system (PA317-mIL12) which can express both p35 and p40 and has potential biological activity can obviously enhance the

  5. Multiple-instance learning as a classifier combining problem

    DEFF Research Database (Denmark)

    Li, Yan; Tax, David M. J.; Duin, Robert P. W.

    2013-01-01

    In multiple-instance learning (MIL), an object is represented as a bag consisting of a set of feature vectors called instances. In the training set, the labels of bags are given, while the uncertainty comes from the unknown labels of instances in the bags. In this paper, we study MIL with the ass...

  6. Enantioselective adsorption of ibuprofen and lysine in metal-organic frameworks

    NARCIS (Netherlands)

    Bueno-Perez, R.; Martin-Calvo, A.; Gómez-Álvarez, P.; Gutiérrez-Sevillano, J.J.; Merkling, P.J.; Vlugt, T.J.H.; van Erp, T.S.; Dubbeldam, D.; Calero, S.

    2014-01-01

    This study reveals the efficient enantiomeric separation of bioactive molecules in the liquid phase. Chiral structure HMOF-1 separates racemic mixtures whereas heteroselectivity is observed for scalemic mixtures of ibuprofen using non-chiral MIL-47 and MIL-53. Lysine enantiomers are only separated

  7. Small-angle X-ray scattering documents the growth of metal-organic frameworks

    NARCIS (Netherlands)

    Goesten, M.G.; Stavitski, I.; Juan-Alcañiz, J.; Martinez-Joaristi, A.; Petukhov, A.V.; Kapteijn, F.; Gascon, J.

    2013-01-01

    We present a combined in situ small- and wide-angle scattering (SAXS/WAXS) study on the crystallization of two topical metal-organic frameworks synthesized from similar metal and organic precursors: NH2-MIL-53(Al) and NH2-MIL-101(Al). A thorough analysis of SAXS data reveals the most important

  8. New geologic, fluid inclusion and stable isotope studies on the controversial Igarapé Bahia Cu-Au deposit, Carajás Province, Brazil

    Science.gov (United States)

    Dreher, Ana M.; Xavier, Roberto P.; Taylor, Bruce E.; Martini, Sérgio L.

    2008-02-01

    contribution of reduced and oxydized sulfur is also evident. Oxygen isotopic ratios in magnetite, quartz, and siderite yield calculated temperatures of ˜400°C and δ18O-enriched compositions (5 to 16.5 per mil) for the ore-forming fluids that suggest a magmatic input and/or an interaction with 18O-rich, probably sedimentary rocks. The late veins of the Igarapé Bahia deposit area were formed from saline aqueous fluids (2 to 60 wt% NaCl + CaCl2 equiv) with δ18Ofluid compositions around 0 per mil that indicate contribution from meteoric fluids. With respect to geological features, Igarapé Bahia bears similarity with syngenetic, volcanic-hosted massive sulfide (VHMS)-type deposits, as indicated by the volcano-sedimentary geological context, stratabound character, and association with submarine volcanic flows, hyaloclastite, and exhalative beds such as BIF and chert. On the other hand, the highly saline ore fluids and the mineral assemblage, dominated by magnetite and chalcopyrite, with associated gold, U- and LREE-minerals and scarce pyrite, indicate that Igarapé Bahia belongs to the Fe oxide Cu-Au (IOCG) group of deposits. The available geochronologic data used to attest syngenetic or epigenetic origins for the mineralization are either imprecise or may not represent the main mineralization episode but a later, superimposed event. The C, S, and O isotopic results obtained in this study do not clearly discriminate between fluid sources. However, recent B isotope data obtained on tourmaline from the matrix of the fragmental rock ore unit (Xavier, Wiedenbeck, Dreher, Rhede, Monteiro, Araújo, Chemical and boron isotopic composition of tourmaline from Archean and Paleoproterozoic Cu-Au deposits in the Carajás Mineral Province, 1° Simpósio Brasileiro de Metalogenia, Gramado, Brazil, extended abstracts, CD-ROM, 2005) provide strong evidence of the involvement of a marine evaporitic source in the hydrothermal system of Igarapé Bahia. Evaporite-derived fluids may explain the

  9. Comparison of Risk Assessment Using HAZOP and ETBA Techniques: Case Study of a Gasoline Refinery Unit in Iran

    Directory of Open Access Journals (Sweden)

    Shirazeh Arghami

    2015-12-01

    Full Text Available Background: Prevention of accidents—a crucial requirement in oil industries—involves hazard recognition, risk assessment, and corrective actions. The purpose of this study was to compare the ETBA and HAZOP techniques for risk assessment in a gasoline refinery unit. Methods: In this case study, data were collected using process flow diagram, walking–talking through method, piping and instrumentation diagram, and direct observations. Worksheets for both techniques were filled on the basis of the risk assessment matrix MIL-STD-882E. Results: The HAZOP method identified 44 deviations attributable to 118 causes. In addition, 11.37% of the identified hazards were associated with unacceptable risk, and 36.36%, with unfavorable risk. The ETBA method detected 10 groups of energy (24 subgroups; 33 hazards were detected, 10.62% of which were associated with unacceptable risk. Conclusion: HAZOP proved to be the more powerful technique for the prediction and identification of hazards. However, ETBA detected certain hazards that were not identifiable using HAZOP. Therefore, a combination of these two methods is desirable for the assessment of hazard risk in process industries.

  10. A Comparative Field Study of Permastripe(Trademark) Polymer Concrete and Waterborne Airfield Pavement Markings

    Science.gov (United States)

    2007-06-01

    mounted to a self-propelled lawn mower (Figure 4). This resulted in acceptable Permastripe™ line thickness (25 to 30 mils). However, bead embedment...Permastripe™ markings were sprayed using a modified drywall texture application device mounted on a modified self-propelled lawn mower (Figure 4). This

  11. A sulfur isotopic study of alabandites from some manganese ore deposits in Japan

    International Nuclear Information System (INIS)

    Sasaki, Akira; Hirowatari, Fumitoshi; Fukuoka, Masato.

    1985-01-01

    Alabandites from Pretertiary bedded- and Tertiary vein-type manganese deposits in Japan have been examined for their sulfur isotopic composition. delta 34 S(CDT) value ranges widely from -31 to +11 per mil in 12 specimens taken from 10 bedded type deposits. While the mineral is no more than a minor constituent in most of the deposits, the isotopic features clearly indicate that these alabandites are of bacteriogenic sedimentary origin, thus raising an important constraint for the genesis of this group of deposits. A cluster of delta 34 S around -30 per mil implies an open-system, steady-state reduction (Schwarcz and Burnie, 1973) from a source SO 4 2- with the isotopic level of ca. +20 per mil. The inferred source is likely to have been in the Triassic sea. Current conjectures upon the age of host sedimentary rocks of the deposits concerned are in favor of this view. Alabandites from the Tertiary (Miocene) vein type deposits show only a minor variation in delta 34 S, +4 to +5 per mil. The data are very similar to the average isotopic composition of sulfides of the Miocene, ''Green Tuff'' mineralization represented by the kuroko type deposits. The remarkable consistency in sulfur isotopic composition of the Green Tuff mineralization over an extensive area may require a huge, common reservoir of sulfur in some form, which still remains an enigma. (author)

  12. A Study of Strategic Lessons Learned in Vietnam. Volume I. The Enemy

    Science.gov (United States)

    1979-11-30

    side,. of the CambediAn-South Vietnamese border, a legacy from the Viet Minh and the basis for PAV,4’s logistical infr- estructure . It was rot until...Communist support. 20. LTC Lance J. Burton USO , Norti. Vietnaut’s Mil~tary l.ogistics System: Its Contribution to the Wr_ .l-b69, (Fort Leav-nworth

  13. Production of bioactive soluble interleukin-15 in complex with interleukin-15 receptor alpha from a conditionally-replicating oncolytic HSV-1.

    Directory of Open Access Journals (Sweden)

    David C Gaston

    Full Text Available Oncolytic type-1 herpes simplex viruses (oHSVs lacking the γ134.5 neurovirulence gene are being evaluated for treatment of a variety of malignancies. oHSVs replicate within and directly kill permissive cancer cells. To augment their anti-tumor activity, oHSVs have been engineered to express immunostimulatory molecules, including cytokines, to elicit tumor-specific immune responses. Interleukin-15 (IL-15 holds potential as an immunotherapeutic cytokine because it has been demonstrated to promote both natural killer (NK cell-mediated and CD8(+ T cell-mediated cytotoxicity against cancer cells. The purpose of these studies was to engineer an oHSV producing bioactive IL-15. Two oHSVs were constructed encoding murine (mIL-15 alone (J100 or with the mIL-15 receptor α (mIL-15Rα, J100D to determine whether co-expression of these proteins is required for production of bioactive mIL-15 from oHSV. The following were demonstrated: i both oHSVs retain replication competence and cytotoxicity in permissive tumor cell lines. ii Enhanced production of mIL-15 was detected in cell lysates of neuro-2a cells following J100D infection as compared to J100 infection, suggesting that mIL-15Rα improved mIL-15 production. iii Soluble mIL-15 in complex with mIL-15Rα was detected in supernates from J100D-infected, but not J100-infected, neuro-2a, GL261, and CT-2A cells. These cell lines vary in permissiveness to oHSV replication and cytotoxicity, demonstrating soluble mIL-15/IL-15Rα complex production from J100D was independent of direct oHSV effects. iv The soluble mIL-15/IL-15Rα complex produced by J100D was bioactive, stimulating NK cells to proliferate and reduce the viability of syngeneic GL261 and CT-2A cells. v J100 and J100D were aneurovirulent inasmuch as no neuropathologic effects were documented following direct inoculation into brains of CBA/J mice at up to 1x10(7 plaque forming units. The production of mIL-15/mIL-15Rα from multiple tumor lines, as well

  14. Department of Homeland Security Cyber Resilience Review (Case Study)

    Science.gov (United States)

    2014-01-23

    operational stress and c-Ues. TheCRRseek:stoelidtthecurrentstateof cyber seruritymanagementpracticesfromkeyc.yber .securitypersonnel...Institutionalization in the CRR Processes  are   acculturated ,   defined,   measured,   and   governed   Maturity indictor levels (MIL) are used in...processes that •  produce consistent results over time •  are retained during times of stress Level 0-Incomplete Level 1-Performed Level 2

  15. Land Combat Systems Industry. Industry Study, Spring 2009

    Science.gov (United States)

    2009-01-01

    such a technology hastened to production that might cause what the government tends to call “technological surprise” is Friction Stir Welding . This...Success Stories. “ Friction Stir Welding of Aluminum Armor”. March 2002. Available online: http://www.onr.navy.mil/sci_tech/3t/mantech/docs...supply tenders as well as other factors.4 Competition in the industry is typically low and steady, but affected by increased LCS funding along with the

  16. Sub-surface lithology, distribution of uranium and other trace elements and sulphur isotope studies of Bhuj formation in the Bharasar area, Kachchh district, Gujarat, India

    International Nuclear Information System (INIS)

    Thangavel, S.; Maithani, P.B.; Banerjee, Rahul

    1998-01-01

    Lower Cretaceous Bhuj Formation as recorded in the drilled core in the Bharasar area, Kachchh district, Gujarat comprises marginal marine to fluvio-deltaic sediments of sandstone, siltstone, clay and carbonaceous shales with pyrite and coalified matter. Drill-core samples of sandstone chemically analysed 3 O 8 whereas basic rock/dolerite up to 16 ppm eU 3 O 8 indicating contamination of overlying sediments. 34 S values of euhedral pyrite from the sandstone with admixed patches of mud stone and siltstone have a wide range of +0.71 per mil to +43.20 per mil with an average of 16.04 per mil, which indicate a sedimentary source for sulphur, probably either marine sulphate, sea water or geosynclinal sediments

  17. Visualización de datos: una imagen puede valer más que mil números, pero no siempre más que mil palabras

    OpenAIRE

    Cairo, Alberto

    2018-01-01

    In the last two decades, data visualization has become a fundamental tool for the exploration and communication of complex messages in disciplines such as statistics, business intelligence, science, journalism, etc. This article exposes the advantages of visualization and also some of its main problems.

  18. Electrostatic bonding of thin (cycle sine 3 mil) 7070 cover glass to Ta2O5 AR-coated thin (cycle sine 2 mil) silicon wafers and solar cells

    Science.gov (United States)

    Egelkrout, D. W.

    1981-01-01

    Electrostatic bonding of thin cover glass to thin solar cells was researched. Silicon solar cells, wafers, and Corning 7070 glass of from about 0.002" to about 0.003" in thickness were used in the investigation to establish optimum parameters for producing mechanically acceptable bonds while minimizing thermal stresses and resultant solar cell electrical parameter degradation.

  19. Naval Justice School Evidence Study Guide. Revision

    Science.gov (United States)

    1989-01-01

    it may even be necessary for the military judge to breach a privilege in order to see if that privilege exists. See, eq., Lutwak v. United States, 344...other. Mil.R.Evid. 504(c)(2)(B). See also Lutwak v. United States, 344 U.S. 604 (1953) (describes factual situation which depicts a marital sham). 6...only against the actor or declarant. See, eg., Lutwak v. United States, 344 U.S. 604 (1953); United States v. Beverly, 14 C.M.A. 468, 34 C.M.R. 248

  20. Mortalidade infantil por causas evitáveis no Brasil: um estudo ecológico no período 2000-2002 Infant mortality from preventable causes in Brazil: an ecological study in 2000-2002

    Directory of Open Access Journals (Sweden)

    Antonio Fernando Boing

    2008-02-01

    Full Text Available O objetivo desse estudo foi testar as associações entre a mortalidade infantil por causas evitáveis no Brasil com indicadores sócio-econômicos e de serviços e investimentos em saúde. Trata-se de um estudo ecológico, cujas unidades de análise foram os 296 municípios brasileiros com população superior a 80 mil habitantes. Realizaram-se os testes de Kruskall-Wallis e ANOVA para identificar diferenças significativas entre os quartis de mortalidade infantil segundo as variáveis independentes, e foram calculados os coeficientes de correlação de Pearson e de Spearman para testar as associações entre todas as variáveis. Os municípios que compuseram os quartis com maior mortalidade infantil por causas evitáveis apresentaram também menor Índice de Desenvolvimento Humano Municipal, Produto Interno Bruto per capita, pessoas que vivem em domicílios com banheiro e água encanada, despesa total com saúde por habitante e médicos por mil habitantes; e maior coeficiente de Gini. A compreensão do papel protagonista das condições sócio-econômicas e de investimentos em saúde sobre a mortalidade infantil por causas evitáveis deve permear as ações que visem à minimização da magnitude e da desigualdade desses óbitos.This study aims to test the associations between infant mortality from preventable causes in Brazil and socioeconomic factors, including those pertaining to health services and investments. This was an ecological study using 296 Brazilian counties (municipalities with more than 80,000 inhabitants each as the analytical units. Kruskall-Wallis and ANOVA tests were performed to compare independent variables according to infant mortality quartile, and Pearson and Spearman's correlation coefficients were computed to test the associations. As the infant mortality quartile from preventable causes increases, there is a gradual decrease in the municipal human development index, per capita gross domestic product, households with

  1. Programa de Prevenção ao Suicídio: estudo de caso em um município do sul do Brasil Suicide Prevention Program: case study in a municipality in the south of Brazil

    Directory of Open Access Journals (Sweden)

    Marta Conte

    2012-08-01

    Full Text Available Este artigo está focado no tema da prevenção do suicídio a partir da análise de um trabalho em desenvolvimento. Foi realizado um estudo de caso do Programa de Promoção à Vida e Prevenção ao Suicídio de Candelária (RS, um município brasileiro que apresenta altos coeficientes de mortalidade por suicídio na população geral e de idosos. O objetivo deste texto é analisar uma experiência que vem obtendo êxito e tem a base numa iniciativa local. Os dados aqui apresentados resultam de observação participante, de entrevistas com a equipe que conduz o trabalho, dos grupos de discussão e da análise documental. Foram utilizadas as seguintes categorias: linha de cuidado, gestão e processo avaliativo. Os resultados da intervenção mostram que as taxas de suicídio decresceram de 5 óbitos/ano (21/100 mil habitantes no período 1996-2000 para 3,6 óbitos/ano (12/100 mil em 2007-2009. O estudo estabelece um diálogo com experiências de outros locais e traz contribuições para programas de prevenção que possam ser organizados no país.This article focuses on the theme of suicide prevention based on analysis of a work in progress. A case study of the Program for Promotion of Life and Suicide Prevention of Candelária in the State of Rio Grande do Sul was conducted. It is a Brazilian municipality that has high suicide mortality rates in the general population and among the elderly. The scope of this paper is to present a experience that has proved successful and is based on a local initiative. The data presented here result from participant observation, interviews with the team carrying out the work, discussion groups and document analysis. The following categories were used: line of care, management and evaluation process. The results of intervention show that suicide rates declined from 5 deaths per year (21/100,000 inhabitants between 1996 and 2000 to 3.6 deaths per year (12/100,000 inhabitants between 2007 and 2009. The study

  2. Analysis of Expedient Field Decontamination Methods for the XMX/2L-MIL High-Volume Aerosol Sampler

    Science.gov (United States)

    2009-12-01

    arsenal. Within the compound, fermented spores were dried and ground into a fine power for use as an aerosol weapon (Alibek, 1999). As a...may account for some of the shortcomings in bleach disinfection noted earlier. Addition of vinegar , a substance which would likely be present in...Furthermore, lowering the pH using vinegar is strongly recommended; it represents a simple, non-toxic method for increasing bleach’s ability to

  3. Tuning defects to facilitate hydrogen storage in core-shell MIL-101(Cr)@UiO-66(Zr) nanocrystals

    CSIR Research Space (South Africa)

    Ren, Jianwei

    2015-08-01

    Full Text Available Box 395, Pretoria 0001, South Africa bShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China cSchool of Chemistry and Chemical Engineering, South China.... The point-and-shoot function from the TEM/EDX was employed to get further evidence on core-shell morphology, the enrichment of Cr element relative to Zr element in the core region, and the enrichment of Zr element in the shell region were detected (Fig. 2...

  4. Determination of MIL-H-6083 Hydraulic Fluid In-Service Use Limits for Self-Propelled Artillery

    Science.gov (United States)

    1991-09-01

    determined using the American Society for Testing and Materials (ASTM) D1744 Karl Fischer Reagent method . The specification limit is 0.05% (500 pans per...cazefully controlled. TOTAL ACID NUMBER The acid number was determined by the ASTM D664 potentiometric titration test method . Unfortunately, data were...fluid condition t results with AOAP tent date was found. The Navy Patch Kit method for particle contamination meamrement was evaluated as a possible

  5. A Theory of Electromagnetic Shielding with Applications to MIL-STD-285, IEEE-299, and EMP Simulation

    Science.gov (United States)

    1985-02-01

    in a building sized enclosure slot-like discontinuities may not all be small compar- ed to all wavelengths in the incident field, and slot resonan ...OFFICE OF RESEARCH/ NPP US AIR FORCE SPACE COMMAND ATTN STATE & LOCAL PROG SUPPORT O ATTN KKO 500 C STREET, SW ATTN KRQ WASHINGTON, DC 20472 ATTN XPOW

  6. User’s Supplement to MIL-STD-740-2 Modified for Measurements to 20 KHz

    Science.gov (United States)

    1989-10-01

    Process Compressor Div. 100 Chemung Street 1 AMI Research Painted Post, NY 14870 2 Captain Walk 1 James Seibert New London, CT 06320 1 Mark Clifton 1...CT 06340-4909 942 Memorial Pkwy. 1 Wilf Kalbach Phillipsburg, NJ 08865 1 David Mewha 1 Timothy Luce 1 Ed Miller 1 Kevin Brimmer 2 ITW Linac 1 Robert

  7. De Kosala a Bollywood: dos mil años contando historias. Un estudio semiótico del ramayana

    OpenAIRE

    Noguera Mas, Roser

    2008-01-01

    RESUMEN El Rāmāyaa se originó en el norte de la India entre los siglos IV a.C. y IV d.C. Contiene elementos fantásticos, míticos, legendarios y religiosos. Los jainistas y los budistas escribieron sus propios rāmāyaas para criticar aspectos del brahmanismo y difundir sus doctrinas. La literatura sánscrita se inspiró en la leyenda de Rāma y la historia también se incluyó en los purāas. En el siglo V aparecieron las primeras narrativas visuales, paneles esculpidos en los templos que se le...

  8. A New Operating System for Security Tagged Architecture Hardware in Support of Multiple Independent Levels of Security (MILS) Compliant System

    Science.gov (United States)

    2014-04-01

    of services that includes multitasking , inter-task communication, and dynamic memory allocation. The bulk of RTEMS is written in both the Ada and C...rtems_initialize_start_multitasking initiates multitasking and applications can start executing. Approved for Public Release; Distribution Unlimited. 29 3.2.2 Problems in RTEMS...or email address. 6. Security Misconfiguration - Security misconfiguration occurs when the attacker gains unauthorized access because the system

  9. Metal–Organic Frameworks M-MOF-74 and M-MIL-100: Comparison of Textural, Acidic, and Catalytic Properties

    Czech Academy of Sciences Publication Activity Database

    Cabelo, C. P.; Gómez-Pozuelo, G.; Opanasenko, Maksym; Nachtigall, P.; Čejka, Jiří

    2016-01-01

    Roč. 81, č. 8 (2016), s. 828-835 ISSN 2192-6506 R&D Projects: GA ČR GA14-07101S Institutional support: RVO:61388955 Keywords : alcohol s * mesoporous materials * heterogeneous catalysis Subject RIV: CF - Physical ; Theoretical Chemistry Impact factor: 2.797, year: 2016

  10. Analysis of the Cost Effectiveness and Applicability of the Reliability Tasks of MIL-STD-785B.

    Science.gov (United States)

    1985-09-01

    M by designating specific requirements and objectives for each of the following organizations: HQ USAF/LE - Deputy Chief of Staff for Logistics IHQ ...Department of the Navy. Product Assurance Requirements Guide for Naval Ocean Systems Center Projects. NOSC TD 432. Naval Ocean Systems Center: San Diego

  11. Implications of Multi-Core Architectures on the Development of Multiple Independent Levels of Security (MILS) Compliant Systems

    Science.gov (United States)

    2012-10-01

    Two CBEA based products available for purchase were: Sony PlayStation 3 and the IBM BladeCenter QS20. The CBEA provides a single general purpose...and second generation Sony PlayStation 3 devices. Figure 13 provides the block diagram for the CMOS 90 nm Cell Broadband Engine processor [IBM07a...information between two red networks via a black network. In this scenario, a Sony PlayStation 3 is used for the CBEA-compliant processor. The CBEA

  12. Emergence of Nonlinear Optical Activity by Incorporation of a Linker Carrying the p-Nitroaniline Motif in MIL-53 Frameworks

    NARCIS (Netherlands)

    Markey, Karen; Krüger, Martin; Seidler, Tomasz; Reinsch, Helge; Verbiest, Thierry; De Vos, Dirk E.; Champagne, Benoît; Stock, Norbert; van der Veen, M.A.

    2017-01-01

    p-Nitroaniline presents the typical motif of a second-order nonlinear optically (NLO) active molecule. However, because of its crystallization in an antiparallel and hence centrosymmetric structure, the NLO activity is lost. In this contribution, the p-nitroaniline motif was built successfully

  13. Woodland carbon code: building an evidence base for the "4 per mil" initiative in land converted to forestry.

    Science.gov (United States)

    Hannam, Jacqueline; Vanguelova, Elena; West, Vicky

    2017-04-01

    The Woodland Carbon Code is a voluntary standard for woodland creation projects in the UK. Carbon sequestration resulting from certified projects will contribute directly to the UK's national targets for reducing emissions of greenhouse gases (GHG). Whilst this is concerned primarily with above ground capture there is little empirical evidence of the longer term carbon sequestration potential of soils under this land use change in the UK. We present preliminary results from a resurvey of 20 sites originally sampled as part of the soil survey of England and Wales. It includes soil carbon stocks assessed within the soil profile (up to 1m depth) where sites have been converted to forestry in the last 40 years. The small number of sites (n=20) and high variability in soil type, forest type and original land use prevented detailed analysis between these different factors, but overall there was an increase in carbon concentration in the whole profile, driven primarily by an increase the surface organic layers. For all sites combined there was no significant difference in the C stocks between the two survey periods. The increase in carbon stock in the surface organic horizons tended to be offset by a decrease in the mineral subsoils (specifically in Brown Earth soils) primarily as a result of bulk density changes. There are presently insufficient measured data from a range of UK climate, land-use and soil type conditions to quantify with confidence soil C changes during afforestation. This is partly because of the difficulties of detecting relatively slow changes in spatially heterogeneous soils and also obtaining good examples of sites that have undergone documented land use change. Reviewing results from all ongoing afforestation projects in the UK will provide better quantification of the C sequestration potential of forest soils to be accounted for in the Woodland Carbon Code's overall GHG mitigation potential.

  14. Evaluation of the Flying Qualities Requirements of MIL-F-8785B (ASG) using the C-5A Airplane

    Science.gov (United States)

    1975-03-20

    sea level (MSL), ft h Maximum seivicu altitude, ftma• h1 M0ixmum op.rational altitude, fta max h Minimum operational altitude, ft ra.n H Total flight...0.04 2,000 675,00U Fmd 0.1161 0.029 0.04 The fla)s down data, li t: the i,,ise r-suIt-, sho., : oat the period (54 to 74 seconds) is easily contiallable

  15. Geoffrey Layton Slack OBE (Mil), CBE, TD, BDS DDS, FDSRCS, FDS Glas, FFDRCSI, Dip Bact (1912-1991).

    Science.gov (United States)

    Gelbier, Stanley

    2014-02-01

    It is with some pride that the author worked in Geoffrey Slack's department from 1963 to 1967 and even retained a working relationship with him after that time. Slack was Professor of Dental Surgery (1959-1976) and later Professor of Community Dental Health (1976-1977) at The London Hospital Medical College, within the University of London. The change in titles came about as a result of recognition of his contribution to developments in public health and community dental care and services, for many of which he was directly responsible. He was Dental Dean from 1965 until 1969. Upon retirement in 1977 he became Emeritus Professor. In addition, he was Dean of the Faculty of Dental Surgery at the Royal College of Surgeons of England from 1974 to 1977.

  16. Química verde, os desafios da química do novo milênio

    OpenAIRE

    Prado, Alexandre G. S.

    2003-01-01

    The fundamental concepts of the green chemistry are highlighted in order to present the enormous number of challenges to develop a new chemistry in research, industry and education. The practice of an environmental friendly chemistry are presented to improve the economics of chemical manufacturing and to enhance the much-tarnished image of chemistry and to present the opportunities to discover and apply this new chemistry. The challenges and opportunities of green chemistry in the world and B...

  17. Military Assistance Command, Vietnam: The Imperative of Pol-Mil Unity. ACSC Quick-Look 05-12

    National Research Council Canada - National Science Library

    Weaver, Michael

    2005-01-01

    ...), when General William Westmoreland assumed command. The MAAG continued to assist the development of the South Vietnamese Armed Forces, but the command change fragmented its operational efforts among the MACV staff...

  18. Metal–Organic Frameworks M-MOF-74 and M-MIL-100: Comparison of Textural, Acidic, and Catalytic Properties

    Czech Academy of Sciences Publication Activity Database

    Cabelo, C. P.; Gómez-Pozuelo, G.; Opanasenko, Maksym; Nachtigall, P.; Čejka, Jiří

    2016-01-01

    Roč. 81, č. 8 (2016), s. 828-835 ISSN 2192-6506 R&D Projects: GA ČR GA14-07101S Institutional support: RVO:61388955 Keywords : alcohols * mesoporous materials * heterogeneous catalysis Subject RIV: CF - Physical ; Theoretical Chemistry Impact factor: 2.797, year: 2016

  19. 2005 - aasta, mil loodus suunas globaalset päevakorda / Dag Hartelius ; tõlk. Kadri Liik

    Index Scriptorium Estoniae

    Hartelius, Dag

    2005-01-01

    Aasta 2005 on toonud julgeolekuaruteludes esiplaanile loodusõnnetused, kliimamuutuse ja energiaküsimused. Tuumatemaatika on taas päevakorral, samal ajal kui võitlus terrorismiga on juba osa meie argikäitumisest ja -mõtlemisest. Euroopa ainus tulevikutee on avatus

  20. Self-reported Adverse Health Events Following Smallpox Vaccination in a Large Prospective Study of US Military Service Members

    Science.gov (United States)

    2007-08-27

    depression, panic disorder, other anxiety disorders, bulimia nervosa, binge‑eating disorders, and PTSD are reported in one mental health variable...22. 42. Wright KM, Huffman AH, Adler AB, Castro CA. Psychological screening program over‑ view. Mil Med 2002; 167:853‑61. 43. Brewin CR. Systematic

  1. Diffuse CO2 degassing studies to reveal hidden geothermal resources in oceanic volcanic islands: The Canarian archipelago case study

    Science.gov (United States)

    Rodríguez, F.; Perez, N. M.; García-Merino, M.; Padron, E.; Melián, G.; Asensio-Ramos, M.; Hernandez Perez, P. A.; Padilla, G.; Barrancos, J.; Cótchico, M. A.

    2016-12-01

    The Canary Islands, owing to their recent volcanism, are the only Spanish territory with potential high enthalpy geothermal resources. The final goal of geothermal exploration in a specific area is to locate and define the size, shape, structure of hidden geothermal resources, and determine their characteristics (fluid type, temperature, chemical composition an ability to produce energy). At those areas where there is not any evidence of endogenous fluids manifestations at surface, that traditionally evidence the presence of an active geothermal system) the geochemical methods for geothermal exploration must include soil gas surveys. This is the case of five mining licenses for geothermal exploration in the Canay Islands, four in Tenerife and one in Gran Canaria Island. We report herein the results of diffuse CO2 emission studies in the five mining licenses during 2011-2014. The primary objective of the study was to sort the possible geothermal potential of these five mining licenses, thus reducing the uncertainty inherent to the selection of the areas with highest geothermal potential for future exploration works. The criterion used to sort the different areas was the contribution of volcano-hydrothermal CO2 in the degassing at each study area. Several hundreds of measurements of diffuse CO2 emission, soil CO2 concentration and isotopic composition were performed at each study area. Based in three different endmembers (biogenic, atmospheric and deep-seated CO2) with different CO2 concentrations (100, 0.04 and 100% respectively) and isotopic compositions (-20, -8 and -3 per mil vs. VPDB respectively) a mass balance to distinguish the different contribution of each endmember in the soil CO2 at each sampling site was made. The percentage of the volcano-hydrothermal contribution in the current diffuse CO2 degassing was in the range 2-19%.The Abeque mining license, that comprises part of the north-west volcanic rift of Tenerife, seemed to show the highest geothermal

  2. Identification of microRNA-Like RNAs in the filamentous fungus Trichoderma reesei by solexa sequencing.

    Directory of Open Access Journals (Sweden)

    Kang Kang

    Full Text Available microRNAs (miRNAs are non-coding small RNAs (sRNAs capable of negatively regulating gene expression. Recently, microRNA-like small RNAs (milRNAs were discovered in several filamentous fungi but not yet in Trichoderma reesei, an industrial filamentous fungus that can secrete abundant hydrolases. To explore the presence of milRNA in T. reesei and evaluate their expression under induction of cellulose, two T. reesei sRNA libraries of cellulose induction (IN and non-induction (CON were generated and sequenced using Solexa sequencing technology. A total of 726 and 631 sRNAs were obtained from the IN and CON samples, respectively. Global expression analysis showed an extensively differential expression of sRNAs in T. reesei under the two conditions. Thirteen predicted milRNAs were identified in T. reesei based on the short hairpin structure analysis. The milRNA profiles obtained in deep sequencing were further validated by RT-qPCR assay. Computational analysis predicted a number of potential targets relating to many processes including regulation of enzyme expression. The presence and differential expression of T. reesei milRNAs imply that milRNA might play a role in T. reesei growth and cellulase induction. This work lays foundation for further functional study of fungal milRNAs and their industrial application.

  3. Insights on proximity effect and multiphoton induced luminescence from gold nanospheres in far field optical microscopy

    Energy Technology Data Exchange (ETDEWEB)

    Borglin, Johan [Biomedical Photonics Group, Department of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen 10, 412 96 Gothenburg (Sweden); Department of Physics, University of Gothenburg, Kemivägen 10, 412 96 Gothenburg (Sweden); Guldbrand, Stina [Department of Physics, University of Gothenburg, Kemivägen 10, 412 96 Gothenburg (Sweden); Evenbratt, Hanne [Pharmaceutical Technology, Department of Chemistry and Chemical Engineering, Chalmers University of Technology, Kemigården 4, 412 96 Gothenburg (Sweden); Kirejev, Vladimir; Ericson, Marica B., E-mail: marica.ericson@chem.gu.se [Biomedical Photonics Group, Department of Chemistry and Molecular Biology, University of Gothenburg, Kemivägen 10, 412 96 Gothenburg (Sweden); Grönbeck, Henrik [Department of Applied Physics, Chalmers University of Technology, Kemivägen 9, 412 96 Gothenburg (Sweden)

    2015-12-07

    Gold nanoparticles can be visualized in far-field multiphoton laser-scanning microscopy (MPM) based on the phenomena of multiphoton induced luminescence (MIL). This is of interest for biomedical applications, e.g., for cancer diagnostics, as MPM allows for working in the near-infrared (NIR) optical window of tissue. It is well known that the aggregation of particles causes a redshift of the plasmon resonance, but its implications for MIL applying far-field MPM should be further exploited. Here, we explore MIL from 10 nm gold nanospheres that are chemically deposited on glass substrates in controlled coverage gradients using MPM operating in NIR range. The substrates enable studies of MIL as a function of inter-particle distance and clustering. It was shown that MIL was only detected from areas on the substrates where the particle spacing was less than one particle diameter, or where the particles have aggregated. The results are interpreted in the context that the underlying physical phenomenon of MIL is a sequential two-photon absorption process, where the first event is driven by the plasmon resonance. It is evident that gold nanospheres in this size range have to be closely spaced or clustered to exhibit detectable MIL using far-field MPM operating in the NIR region.

  4. Insights on proximity effect and multiphoton induced luminescence from gold nanospheres in far field optical microscopy

    International Nuclear Information System (INIS)

    Borglin, Johan; Guldbrand, Stina; Evenbratt, Hanne; Kirejev, Vladimir; Ericson, Marica B.; Grönbeck, Henrik

    2015-01-01

    Gold nanoparticles can be visualized in far-field multiphoton laser-scanning microscopy (MPM) based on the phenomena of multiphoton induced luminescence (MIL). This is of interest for biomedical applications, e.g., for cancer diagnostics, as MPM allows for working in the near-infrared (NIR) optical window of tissue. It is well known that the aggregation of particles causes a redshift of the plasmon resonance, but its implications for MIL applying far-field MPM should be further exploited. Here, we explore MIL from 10 nm gold nanospheres that are chemically deposited on glass substrates in controlled coverage gradients using MPM operating in NIR range. The substrates enable studies of MIL as a function of inter-particle distance and clustering. It was shown that MIL was only detected from areas on the substrates where the particle spacing was less than one particle diameter, or where the particles have aggregated. The results are interpreted in the context that the underlying physical phenomenon of MIL is a sequential two-photon absorption process, where the first event is driven by the plasmon resonance. It is evident that gold nanospheres in this size range have to be closely spaced or clustered to exhibit detectable MIL using far-field MPM operating in the NIR region

  5. Magnetic ionic liquids as non-conventional extraction solvents for the determination of polycyclic aromatic hydrocarbons.

    Science.gov (United States)

    Trujillo-Rodríguez, María J; Nacham, Omprakash; Clark, Kevin D; Pino, Verónica; Anderson, Jared L; Ayala, Juan H; Afonso, Ana M

    2016-08-31

    This work describes the applicability of magnetic ionic liquids (MILs) in the analytical determination of a group of heavy polycyclic aromatic hydrocarbons. Three different MILs, namely, benzyltrioctylammonium bromotrichloroferrate (III) (MIL A), methoxybenzyltrioctylammonium bromotrichloroferrate (III) (MIL B), and 1,12-di(3-benzylbenzimidazolium) dodecane bis[(trifluoromethyl)sulfonyl)]imide bromotrichloroferrate (III) (MIL C), were designed to exhibit hydrophobic properties, and their performance examined in a microextraction method for hydrophobic analytes. The magnet-assisted approach with these MILs was performed in combination with high performance liquid chromatography and fluorescence detection. The study of the extraction performance showed that MIL A was the most suitable solvent for the extraction of polycyclic aromatic hydrocarbons and under optimum conditions the fast extraction step required ∼20 μL of MIL A for 10 mL of aqueous sample, 24 mmol L(-1) NaOH, high ionic strength content of NaCl (25% (w/v)), 500 μL of acetone as dispersive solvent, and 5 min of vortex. The desorption step required the aid of an external magnetic field with a strong NdFeB magnet (the separation requires few seconds), two back-extraction steps for polycyclic aromatic hydrocarbons retained in the MIL droplet with n-hexane, evaporation and reconstitution with acetonitrile. The overall method presented limits of detection down to 5 ng L(-1), relative recoveries ranging from 91.5 to 119%, and inter-day reproducibility values (expressed as relative standard derivation) lower than 16.4% for a spiked level of 0.4 μg L(-1) (n = 9). The method was also applied for the analysis of real samples, including tap water, wastewater, and tea infusion. Copyright © 2016 Elsevier B.V. All rights reserved.

  6. Probability of Detection (POD) Analysis for the Advanced Retirement for Cause (RFC)/Engine Structural Integrity Program (ENSIP) Nondestructive Evaluation (NDE) System-Volume 3: Material Correlation Study

    National Research Council Canada - National Science Library

    Berens, Alan

    2000-01-01

    .... Volume 1 presents a description of changes made to the probability of detection (POD) analysis program of Mil-STD-1823 and the statistical evaluation of modifications that were made to version 3 of the Eddy Current Inspection System (ECIS v3...

  7. Identification of microRNA-like RNAs in mycelial and yeast phases of the thermal dimorphic fungus Penicillium marneffei.

    Directory of Open Access Journals (Sweden)

    Susanna K P Lau

    Full Text Available BACKGROUND: Penicillium marneffei is the most important thermal dimorphic fungus causing systemic mycosis in China and Southeast Asia. While miRNAs are increasingly recognized for their roles in post-transcriptional regulation of gene expression in animals and plants, miRNAs in fungi were less well studied and their potential roles in fungal dimorphism were largely unknown. Based on P. marneffei genome sequence, we hypothesize that miRNA-like RNAs (milRNAs may be expressed in the dimorphic fungus. METHODOLOGY/PRINCIPAL FINDINGS: We attempted to identify milRNAs in P. marneffei in both mycelial and yeast phase using high-throughput sequencing technology. Small RNAs were more abundantly expressed in mycelial than yeast phase. Sequence analysis revealed 24 potential milRNA candidates, including 17 candidates in mycelial and seven in yeast phase. Two genes, dcl-1 and dcl-2, encoding putative Dicer-like proteins and the gene, qde-2, encoding Argonaute-like protein, were identified in P. marneffei. Phylogenetic analysis showed that dcl-2 of P. marneffei was more closely related to the homologues in other thermal dimorphic pathogenic fungi than to Penicillium chrysogenum and Aspergillus spp., suggesting the co-evolution of dcl-2 among the thermal dimorphic fungi. Moreover, dcl-2 demonstrated higher mRNA expression levels in mycelial than yeast phase by 7 folds (P<0.001. Northern blot analysis confirmed the expression of two milRNAs, PM-milR-M1 and PM-milR-M2, only in mycelial phase. Using dcl-1(KO, dcl-2(KO, dcl(DKO and qde-2(KO deletion mutants, we showed that the biogenesis of both milRNAs were dependent on dcl-2 but not dcl-1 or qde-2. The mRNA expression levels of three predicted targets of PM-milR-M1 were upregulated in knockdown strain PM-milR-M1 (KD, supporting regulatory function of milRNAs. CONCLUSIONS/SIGNIFICANCE: Our findings provided the first evidence for differential expression of milRNAs in different growth phases of thermal dimorphic

  8. A review of sulphur isotope results from late Silurain VHMS mineralisation, Hill End through, NSW

    International Nuclear Information System (INIS)

    Downes, P.M.; Seccombe, P.; Brown, S.

    1999-01-01

    quartz range from 1 .9 to 4.8 per mil. The δ 34 S results from John Fardy are the highest in our study, suggesting a greater contribution from seawater sulphate, compared to other VHMS deposits in the Hill End Trough. The δ 34 S values appear to be independent of the host rock units, however a relationship is proposed between mineralisation and proximity to felsic volcanic centres. The Mt Bulga, Lewis Ponds and Accost occurrences are close to felsic volcanic centres and have more magmatic δ 34 S signatures. By contrast, the Sunny Corner, Peelwood, Calula, Kempfield and Commonwealth areas are more distal and are characterised by 34 S-enrichment and weaker magmatic signatures. An exception to this is the Belara deposit, which is hosted by reworked felsic volcanics and has a magmatic δ 34 S signature. The data indicates a link between water depth, potential for boiling of hydrothermal fluids and resulting mineralisation style. Massive sulphide occurrences, such as Belara (deeper-marine) and Lewis Ponds and Mt Bulga (basin margin), contrast with vein-style/disseminated mineralisation at Accost (shallow marine). However, all of these deposits have a similar isotope distribution. Copyright (1999) Geological Society of Australia

  9. Study of Tranexamic Acid During Air Medical Prehospital Transport Trial (STAAMP Trial)

    Science.gov (United States)

    2016-10-01

    to complete the project. Include the approved target number for statistical significance, followed by type of submission and type of approval with...assigned Number]: Title: Targets required and approved for statistical significance: Submitted to and Approved by: Provide a bullet point list of...applicable, the Quad Chart (available on https://www.usamraa.army.mil) should be updated and submitted with attachments. DELINQUENT REPORTS If the

  10. Institutionalizing Blended Learning into Joint Training: A Case Study and Ten Recommendations

    Science.gov (United States)

    2014-12-01

    mail.mil pbockelman@mesh.dsci.com ABSTRACT In 2011, the Joint Staff J7 (Joint Training) directorate initiated the Continuum of eLearning project in...Orlando, FL. 14. ABSTRACT In 2011, the Joint Staff J7 (Joint Training) directorate initiated the Continuum of eLearning project in order to integrate...dispersed organizations still poses significant challenges. The Joint Staff J7, Deputy Director for Joint Training initiated the Continuum of eLearning

  11. Urban Counterinsurgency: Case Studies and Implications for U.S. Military Forces

    Science.gov (United States)

    1989-10-01

    Politica Electoral Independiente (Original name for Christian Socialist Party)--Venezuela CRS Compagnies Republicaines de Securite (Republican Security...arguably has had the greatest political and military impact of any of the colonial insurgencies in the post -World War II period. The lessons drawn from...Def. SDECE Governor Cmdg General Post General 10th Mil. Region No. Af. Liai- National Territorial Gendar- Armed Forces son Services Police Police

  12. Master in ICT and Learning

    DEFF Research Database (Denmark)

    Danielsen, Oluf

    2004-01-01

    The Master in ICT and Learning (MIL)was started in 2000, and it is owned in collaboration by five Danish universities. It is an accredited virtual part-time 2-year education. MIL is unique in that it builds on the pedagogical framework of project pedagogy and is based in virtual collaboration....... It is organized around ICT and Learning. This is illustrated through a presentation of the study program, the four modules, the projects and the master thesis....

  13. Fibre Laser Welding of HY-80 Steel: Procedure Development and Testing

    Science.gov (United States)

    2010-09-01

    2 Welding The material used in this study was quenched and tempered martensitic HY80 steel which conforms to MIL-S-1621 [2]. The testing...Journal, 1977. [4] AWS, D1.6 in Structural Welding Code Stainless Steel . 2007, American Welding Society: Miami Florida. [5] DefStan, 02-770 Part 2...Canada Fibre Laser Welding of HY-80 Steel Proceedure Development and Testing Christopher Bayley DLP Neil Aucoin DLP Xinjin Cao NRC IAR AMTC Technical

  14. Mitigating the Backlash: US Airpower as a Military Instrument of Policy

    Science.gov (United States)

    2003-06-01

    Studies 10, 1999-2000, n.p., on-line, Internet, 8 June 2003, available from http://www.usafa.af.mil/dfl/ vol10 .html. 26 forces must be employed...2000, n.p. On-line. Internet, 8 June 2003. Available from http://www.usafa.af.mil/dfl/ vol10 .html. 88 “Echoes from Kosovo.” Air Force Magazine

  15. Influence of Filler Pore Structure and Polymer on the Performance of MOF-Based Mixed-Matrix Membranes for CO2 Capture

    KAUST Repository

    Sabetghadam, Anahid

    2018-03-24

    To gain insight into the influence of metal-organic framework (MOF) fillers and polymers on membrane performance, eight different composites were studied by combining four MOFs and two polymers. MOF materials (NH-MIL-53(Al), MIL-69(Al), MIL-96(Al) and ZIF-94) with various chemical functionalities, topologies, and dimensionalities of porosity were employed as fillers, and two typical polymers with different permeability-selectivity properties (6FDA-DAM and Pebax) were selected as matrices. The best-performing MOF-polymer composites were prepared by loading 25wt% of MIL-96(Al) as filler, which improved the permeability and selectivity of 6FDA-DAM to 32 and 10%, while for Pebax they were enhanced to 25 and 18%, respectively. The observed differences in membrane performance in the separation of CO from N are explained on the basis of gas solubility, diffusivity properties, and compatibility between the filler and polymer phases.

  16. Influence of Filler Pore Structure and Polymer on the Performance of MOF-Based Mixed-Matrix Membranes for CO2 Capture

    KAUST Repository

    Sabetghadam, Anahid; Liu, Xinlei; Benzaqui, Marvin; Gkaniatsou, Effrosyni; Orsi, Angelica; Lozinska, Magdalena M.; Sicard, Clemence; Johnson, Timothy; Steunou, Nathalie; Wright, Paul A.; Serre, Christian; Gascon, Jorge; Kapteijn, Freek

    2018-01-01

    To gain insight into the influence of metal-organic framework (MOF) fillers and polymers on membrane performance, eight different composites were studied by combining four MOFs and two polymers. MOF materials (NH-MIL-53(Al), MIL-69(Al), MIL-96(Al) and ZIF-94) with various chemical functionalities, topologies, and dimensionalities of porosity were employed as fillers, and two typical polymers with different permeability-selectivity properties (6FDA-DAM and Pebax) were selected as matrices. The best-performing MOF-polymer composites were prepared by loading 25wt% of MIL-96(Al) as filler, which improved the permeability and selectivity of 6FDA-DAM to 32 and 10%, while for Pebax they were enhanced to 25 and 18%, respectively. The observed differences in membrane performance in the separation of CO from N are explained on the basis of gas solubility, diffusivity properties, and compatibility between the filler and polymer phases.

  17. TREATMENT TANK CORROSION STUDIES FOR THE ENHANCED CHEMICAL CLEANING PROCESS

    Energy Technology Data Exchange (ETDEWEB)

    Wiersma, B.

    2011-08-24

    Radioactive waste is stored in high level waste tanks on the Savannah River Site (SRS). Savannah River Remediation (SRR) is aggressively seeking to close the non-compliant Type I and II waste tanks. The removal of sludge (i.e., metal oxide) heels from the tank is the final stage in the waste removal process. The Enhanced Chemical Cleaning (ECC) process is being developed and investigated by SRR to aid in Savannah River Site (SRS) High-Level Waste (HLW) as an option for sludge heel removal. Corrosion rate data for carbon steel exposed to the ECC treatment tank environment was obtained to evaluate the degree of corrosion that occurs. These tests were also designed to determine the effect of various environmental variables such as temperature, agitation and sludge slurry type on the corrosion behavior of carbon steel. Coupon tests were performed to estimate the corrosion rate during the ECC process, as well as determine any susceptibility to localized corrosion. Electrochemical studies were performed to develop a better understanding of the corrosion mechanism. The tests were performed in 1 wt.% and 2.5 wt.% oxalic acid with HM and PUREX sludge simulants. The following results and conclusions were made based on this testing: (1) In 1 wt.% oxalic acid with a sludge simulant, carbon steel corroded at a rate of less than 25 mpy within the temperature and agitation levels of the test. No susceptibility to localized corrosion was observed. (2) In 2.5 wt.% oxalic acid with a sludge simulant, the carbon steel corrosion rates ranged between 15 and 88 mpy. The most severe corrosion was observed at 75 C in the HM/2.5 wt.% oxalic acid simulant. Pitting and general corrosion increased with the agitation level at this condition. No pitting and lower general corrosion rates were observed with the PUREX/2.5 wt.% oxalic acid simulant. The electrochemical and coupon tests both indicated that carbon steel is more susceptible to localized corrosion in the HM/oxalic acid environment than

  18. Treatment Tank Corrosion Studies For The Enhanced Chemical Cleaning Process

    International Nuclear Information System (INIS)

    Wiersma, B.

    2011-01-01

    Radioactive waste is stored in high level waste tanks on the Savannah River Site (SRS). Savannah River Remediation (SRR) is aggressively seeking to close the non-compliant Type I and II waste tanks. The removal of sludge (i.e., metal oxide) heels from the tank is the final stage in the waste removal process. The Enhanced Chemical Cleaning (ECC) process is being developed and investigated by SRR to aid in Savannah River Site (SRS) High-Level Waste (HLW) as an option for sludge heel removal. Corrosion rate data for carbon steel exposed to the ECC treatment tank environment was obtained to evaluate the degree of corrosion that occurs. These tests were also designed to determine the effect of various environmental variables such as temperature, agitation and sludge slurry type on the corrosion behavior of carbon steel. Coupon tests were performed to estimate the corrosion rate during the ECC process, as well as determine any susceptibility to localized corrosion. Electrochemical studies were performed to develop a better understanding of the corrosion mechanism. The tests were performed in 1 wt.% and 2.5 wt.% oxalic acid with HM and PUREX sludge simulants. The following results and conclusions were made based on this testing: (1) In 1 wt.% oxalic acid with a sludge simulant, carbon steel corroded at a rate of less than 25 mpy within the temperature and agitation levels of the test. No susceptibility to localized corrosion was observed. (2) In 2.5 wt.% oxalic acid with a sludge simulant, the carbon steel corrosion rates ranged between 15 and 88 mpy. The most severe corrosion was observed at 75 C in the HM/2.5 wt.% oxalic acid simulant. Pitting and general corrosion increased with the agitation level at this condition. No pitting and lower general corrosion rates were observed with the PUREX/2.5 wt.% oxalic acid simulant. The electrochemical and coupon tests both indicated that carbon steel is more susceptible to localized corrosion in the HM/oxalic acid environment than

  19. A Cost-Comparison Study Using Actual CHAMPUS Formulas to Price Wilford Hall Medical Center’s FY 1993 Inpatient Workload to Determine Whether CHAMPUS is the More Cost-Effective Health Care Delivery System.

    Science.gov (United States)

    1994-05-01

    PODIATRY AECA HAND SURGERY 3UB MED SVC MIL PER REC ACT TOTAL 0.00 558.00 558. 00 0.00 0.00 64.00 400.00 "袎.00 1022.00 ABIA PLASTIC...ABHA PEDIATRIC SURGERY ABHP PEDIATRIC SURGERY PART ABH SUBTOTAL ABIA PLASTIC SURGERY ABI SUBTOTAL ABKA UROLOGY _ ABK SUBTOTAL AA ORGAN

  20. Acetate-assisted Synthesis of Chromium(III) Terephthalate and Its Gas Adsorption Properties

    International Nuclear Information System (INIS)

    Zhou, Jingjing; Liu, Kaiyu; Kong, Chunlong; Chen, Liang

    2013-01-01

    We report a facile synthetic approach of high-quality chromium(III) terephthalate [MIL-101(Cr)] by acetate-assisted method in the absence of toxic HF. Results indicate that the morphology and surface area of the MIL-101(Cr) can be tuned by modifying the molar ratio of acetate/Cr(NO 3 ) 3 . The Brunauer-Emmett-Teller (BET) surface area of MIL-101(Cr) synthesized at the optimized condition can exceed 3300 m 2 /g. It is confirmed that acetate could promote the dissolution of di-carboxylic linker and accelerate the nucleation ratio. So the pure and small size of MIL-101(Cr) with clean pores can be obtained. CO 2 , CH 4 and N 2 adsorption isotherms of the samples are studied at 298 K and 313 K. Compared with the traditional method, MIL-101(Cr) synthesized by acetate-assisted method possess enhanced CO 2 selective adsorption capacity. At 1.0 bar 298 K, it exhibits 47% enhanced CO 2 adsorption capacity. This may be attributed to the high surface area together with clean pores of MIL-101(Cr)

  1. Effect of Recombinant Factor VIIa as an Adjunctive Therapy in Damage Control for Wartime Vascular Injuries: A Case Control Study

    Science.gov (United States)

    2009-04-01

    Axillary 1 1 2 4 Iliac 2 2 4 Profunda femoral 1 3 4 Femoral 3 1 1 1 2 1 8 Popliteal 1 2 3 Total 9 1 2 4 25 6 20 2 3 72 * Followed by SV graft...VIIa [database on the Internet ]: US Department of Defense. Available at: https://jpta.fhp.osd.mil. Accessed 2007. 10. Boffard KD, Riou B, Warren B, et al

  2. Energy Recovery from Wastewater Treatment Plants in the United States: A Case Study of the Energy-Water Nexus

    OpenAIRE

    Ashlynn S. Stillwell; David C. Hoppock; Michael E. Webber

    2010-01-01

    This manuscript uses data from the U.S. Environmental Protection Agency to analyze the potential for energy recovery from wastewater treatment plants via anaerobic digestion with biogas utilization and biosolids incineration with electricity generation. These energy recovery strategies could help offset the electricity consumption of the wastewater sector and represent possible areas for sustainable energy policy implementation. We estimate that anaerobic digestion could save 628 to 4,940 mil...

  3. Meaning in life and perceived quality of life in Switzerland: results of a representative survey in the German, French and Italian regions.

    Science.gov (United States)

    Bernard, Mathieu; Braunschweig, Giliane; Fegg, Martin Johannes; Borasio, Gian Domenico

    2015-09-29

    The concept of meaning in life (MIL) has become a central one in recent years, particularly in psycho-oncology and palliative care. The Schedule for Meaning in Life Evaluation (SMILE) has been developed to allow individuals to choose the life areas that they consider to be important for their own MIL. This approach relates to the "World Health Organisation" definition of quality of life (QOL) as an individual's perception of his own position. The aims of this study were (i) to assess MIL in a representative sample of the Swiss population according to the three linguistic regions and (ii) to evaluate whether MIL constitutes a significant determinant of the perceived QOL. A telephone survey of the Swiss population, performed by a professional survey company, was conducted between November and December 2013. The interview included the SMILE, perceived QOL (0-10) and health status (1-5), and various sociodemographic variables. In the SMILE, an index of weighting (IOW, 20-100), an index of satisfaction (IOS, 0-100), and a total SMILE index (IOWS, 0-100) are calculated from the areas mentioned by the participants as providing MIL. Among the 6671 telephonic contacts realized, 1015 (15%) participants completed the survey: 405 French, 400 German and 210 Italian participants. "Family" (80.2%), "occupation/work" (51%), and "social relations" (43.3%) were the most cited MIL-relevant categories. Italian participants listed "health" more frequently than German and French participants (50.4% vs 31.5% and 24.8% respectively, χ(2) = 12.229, p = .002). Age, gender, education, employment, and marital status significantly influenced either the MIL scores or the MIL-relevant categories. Linear regression analyses indicate that 24.3% of the QOL variance (p = .000) is explained by health status (B = .609, IC = .490-.728, p = .000), MIL (B = .034, IC = .028-.041, p = .000) and socioeconomic status (F = 11.01, p = .000). The major finding of our

  4. Comparative study of excipients for propanolol hydrochloryde tablets prepared by means of diferent techniques Estudo comparativo de excipientes em diferentes técnicas de preparação de comprimidos de cloridrato de propranolol

    Directory of Open Access Journals (Sweden)

    Cinara Maistro Mamprim

    2001-11-01

    Full Text Available Systemic arterial hipertension (SAH is one of the major factors in cardiovascular risk, since it contributes to the existence of more than 500 thousand cases of cerebral vascular accidents (CVA, 150 thousand deaths by cerebral hemorrhage and approximately a million myocardium infarctions (IAM. In Brazil, it is estimated that about 15% of the adult population can be considered hypertensive. Hypertension can be prevented by changes in lifestyle, although in most cases, the treatment with drugs becomes necessary. Propranolol hydrochloride is the drug chosen for the hypertensive elderly population who has had myocardium infarctation previously. The drug is commercially available as injections, solutions, capsules and tablets. Tablets can be prepared using three different techniques. The most used technique is the granulation by moisture. With the advance of new excipients available in the market for the Pharmaceutical Industry, a more simple and economical technique became possible, improving the physical and chemical stability of the product, reaching the goal of getting more efficient and safer medicine. The purpose of this study was to develop formulations of propranolol hydrochloride tablets through the variation of excipients and manufacture techniques. The propranolol hydrochloryde tablets were stored at 37o C and 50o C with 90% UR for 90 days, and analysed in pre-established time intervals the formulations were evaluated as for the physical and physical-chemical aspects.   A hipertensão arterial sistêmica (HAS é um dos mais importantes fatores de risco cardiovascular uma vez que contribui, mundialmente, com mais de 500 mil casos de acidentes cerebrovasculares (AVC, 150 mil mortes por hemorragia cerebral e aproximadamente um milhão de infartos de miocárdio (IAM. No Brasil estima-se que cerca de15% dos indivíduos adultos possam ser rotulados como hipertensos. A hipertensão pode ser prevenida com a mudança no estilo de vida, embora na

  5. Sobre mitos antiguos y héroes modernos: Una relectura de La Historia Interminable a partir de El héroe de las mil caras

    Directory of Open Access Journals (Sweden)

    María del Carmen Jiménez Ariza

    2013-12-01

    Full Text Available La “crítica mítica” es una corriente de análisis que, desde una perspectiva antropológica, estudia los mitos y símbolos presentes en la literatura y en los cuentos populares. Joseph Campbell, uno de los máximos exponentes de este movimiento, explica los grandes mitos a partir del concepto junguiano de inconsciente colectivo, entendido éste como el sustrato simbólico de carácter ancestral que se constituye en influencia universal y es recurrente en todas las civilizaciones. La Historia interminable, obra mundialmente conocida de Michael Ende, puede ser releída bajo el prisma de las teorías de Campbell, en un intento de corroborar que los arquetipos siguen presentes en las manifestaciones culturales de la humanidad.

  6. Mean-intercept anisotropy analysis of porous media. II. Conceptual shortcomings of the MIL tensor definition and Minkowski tensors as an alternative.

    Science.gov (United States)

    Klatt, Michael A; Schröder-Turk, Gerd E; Mecke, Klaus

    2017-07-01

    Structure-property relations, which relate the shape of the microstructure to physical properties such as transport or mechanical properties, need sensitive measures of structure. What are suitable fabric tensors to quantify the shape of anisotropic heterogeneous materials? The mean intercept length is among the most commonly used characteristics of anisotropy in porous media, e.g., of trabecular bone in medical physics. Yet, in this series of two papers we demonstrate that it has conceptual shortcomings that limit the validity of its results. We test the validity of general assumptions regarding the properties of the mean-intercept length tensor using analytical formulas for the mean-intercept lengths in anisotropic Boolean models (derived in part I of this series), augmented by numerical simulations. We discuss in detail the functional form of the mean intercept length as a function of the test line orientations. As the most prominent result, we find that, at least for the example of overlapping grains modeling porous media, the polar plot of the mean intercept length is in general not an ellipse and hence not represented by a second-rank tensor. This is in stark contrast to the common understanding that for a large collection of grains the mean intercept length figure averages to an ellipse. The standard mean intercept length tensor defined by a least-square fit of an ellipse is based on a model mismatch, which causes an intrinsic lack of accuracy. Our analysis reveals several shortcomings of the mean intercept length tensor analysis that pose conceptual problems and limitations on the information content of this commonly used analysis method. We suggest the Minkowski tensors from integral geometry as alternative sensitive measures of anisotropy. The Minkowski tensors allow for a robust, comprehensive, and systematic approach to quantify various aspects of structural anisotropy. We show the Minkowski tensors to be more sensitive, in the sense, that they can quantify the remnant anisotropy of structures not captured by the mean intercept length analysis. If applied to porous tissue and microstructures, this improved structure characterization can yield new insights into the relationships between geometry and material properties. © 2017 American Association of Physicists in Medicine.

  7. Managing one thousand designs documents: what the success of project has about that?; Gerenciando mil documentos de projetos: o que o sucesso do empreendimento tem com isso?

    Energy Technology Data Exchange (ETDEWEB)

    Oliveira, Ailton C.; Pio, Bruno P. [PETROBRAS S.A., Rio de Janeiro, RJ (Brazil)

    2008-07-01

    Project Management Techniques based on PMI- Project Management Institute have become widely disseminated with showing results in performance improvements. In this paper is presented the improvement obtained in supervising projects in gas pipeline network deployments in Northeast of Brazil by the use of project good practices. The clear definition of project phases; the use of integrated management system; the application of check lists and the prioritization of the issue/approval of documents are examples of tools that impact on the processes of management, with emphasis on control of scope, time, quality and communication. To evaluate the results obtained with the use of these tools is made a comparison between the project of deployment of City Gates TermoFortaleza (CE) and Pedras de Fogo (PB), both belonging to the Program Extension of network Northeast pipeline. (author)

  8. Crecimientos biológicos sobre morteros símil piedra: evaluación, técnicas de limpieza y protección

    OpenAIRE

    Rosato, Vilma; Iloro, Fabián Horacio; Lofeudo, Rosana

    2012-01-01

    Los revestimientos de muros exteriores, además de las agresiones de la intemperie, están sujetos al desarrollo de diversos organismos como: cianobacterias, microalgas, hongos y líquenes, que además del impacto estético, pueden deteriorar el material por medios físicos y químicos. Un buen procedimiento de limpieza debe contemplar la eliminación de estos microorganismos evitando dañar el material e incluir tratamientos que demoren el desarrollo de nuevas colonias. Con esa finalidad, s...

  9. Estudio de factibilidad para la creación de una innovadora empresa de servicios de decoración para eventos en Milán - Italia

    OpenAIRE

    Narváez Estrella, Ivonne Alexandra

    2007-01-01

    La decoración puede ser de interiores o de exteriores, es una muestra artística que influye en el estado de ánimo de quienes habitan el lugar, normalmente tiene una perspectiva tanto práctica como estética. La decoración se aplica a interiores privados, como edificios o viviendas unifamiliares, y públicos, como salas de concierto, bancos, oficinas, teatros, restaurantes, hoteles, centro de exposiciones, lugares de culto y muchos otros. El decorador dispone de una amplia gama de elemen...

  10. A Profile of the University for the Next Millenium O Perfil da Universidade para o próximo milênio

    Directory of Open Access Journals (Sweden)

    Vidal Sunción Infante

    1999-10-01

    Full Text Available In this article, I analyze the role of the university in meeting the demands for new knowledge (scientific, artistic and technological presented by an era of globalization of knowledge that is destroying old paradigms and creating new models of management and behavior. These demands include the need to train new professionals, who are highly skilled both in knowing "how to produce" as well as "why to produce." My recent research indicates that the university is not embarked on the path that leads to training professionals who know "how to produce." Nevertheless, I believe that it is possible to restructure the university to meet these goals. Activities and strategies are being devised to increase the university's ability to generate the basic knowledge that will increase the employability of the new professional with a university diploma. Neste artigo se analisa o papel da Universidade como Alma Mater da geração do conhecimento artístico, científico e tecnológico em confronto com as exigências da atual era da evolução da informação, onde o fenômeno da globalização do conhecimento está propiciando a aceleração da quebra de paradigmas de forma multidimensional e permitindo a concepção e nascimento de novos modelos de gestão, de comportamento, de demanda, entre outros. Atualmente se exige da Universidade competitividade no nível de formação do novo profissional, que deve ser altamente competitivo tanto na dimensão do COMO FAZER quanto do POR QUÊ FAZER. Resultados de pesquisas recentes conduzidas pelo autor, apontam que a Universidade está aquém na dimensão do "Como Fazer", constituindo-se num dos pontos frágeis da atual estrutura universitária. No entanto, cremos que é possível reposicionar a imagem da Universidade, num quadro de expectativa proativa, onde a efetiva inter-relação Universidade-Sociedade possa permitir o aumento de sinergia gerando novas vantagens competitivas, capazes de otimizar a combinação dos meios de produção. À luz destas reflexões, são discutidas ações e estratégias para aumentar a competitividade das organizações tendo a Universidade como a "pedra fundamental" no suporte de geração de conhecimento básico e aplicado que possibilite o aumento da employability do novo profissional com diploma universitário.

  11. Engineering Evaluation Tests of 16 Gauge vs 14 Gauge Staples IAW MIL-STD-1660, 40MM Cartridge on Wooden Pallet

    National Research Council Canada - National Science Library

    Dugan, Jeffery L

    2008-01-01

    .... Three test units were tested with a load of 2,290 lbs, 2,295 lbs, and 2,295 lbs. The testing accomplished on the test units was the Stacking, Repetitive Shock, Drop, Incline-Impact, Forklifting, and Disassembly Tests. Test Units #1...

  12. Proposed Revisions to MIL-F-8785C Related to Flight Safety of Augmented Aircraft. Volume 2. Appendices A through F, References

    Science.gov (United States)

    1982-04-01

    matrices described in Section F.l.2, Equation F7 . These were derived from the aerodynamic coefficients, see Section C.4.4. They are in stability-body...actuator and 6 e is the elevator output. The time histories used the state models of Table C-8, corres- ponding to Equation F7 given in Section F.1.2...40 a c o 0Oa - a ~ ~ 4 -9c -C -9mu * 0 #b4 C 000 0 00, 0a-a-- a~~a.c cc * a -ic* . anlalugaus LAOlla umsila 0 4iO ’ an am am om .a -m , M ~ - . acca

  13. Santa Úrsula e as onze mil virgens segundo as traduções portuguesas quinhentistas da Legenda Áurea

    OpenAIRE

    António José de Almeida

    2011-01-01

    St Ursula is the patron saint of the Ursulines. In the 16th century, two Portuguese versions were produced of the section of the Legenda Aurea Sanctorum by Blessed James of Voragine O.P. containing the Legend of Saint Ursula and her eleven thousand virgin companions. In addition, two types of images of these martyr saints appear in the Legendaries of Saints that appeared in Portugal during that century: one of these portrays the martyrdom of the Saints and the other shows them standing, their...

  14. Santa Úrsula e as onze mil virgens segundo as traduções portuguesas quinhentistas da Legenda Áurea

    Directory of Open Access Journals (Sweden)

    António José de Almeida

    2011-01-01

    Full Text Available St Ursula is the patron saint of the Ursulines. In the 16th century, two Portuguese versions were produced of the section of the Legenda Aurea Sanctorum by Blessed James of Voragine O.P. containing the Legend of Saint Ursula and her eleven thousand virgin companions. In addition, two types of images of these martyr saints appear in the Legendaries of Saints that appeared in Portugal during that century: one of these portrays the martyrdom of the Saints and the other shows them standing, their heads surrounded by a nimbus. This paper discusses the above-mentioned texts and illustrations. It also discusses the recent discovery in the Public Library in Evora of a woodcut printed in a book published in the same century representing the Holy Trinity as a single figure on a throne.

  15. O império dos mil anos e a arte do "tempo barroco": a águia bicéfala como emblema da Cristandade

    Directory of Open Access Journals (Sweden)

    Jaelson Bitran Trindade

    2010-01-01

    Full Text Available The article reveals that between the mid-17th century and the mid-18th century, in the ecclesiastical world of the religious orders (Jesuits, franciscans, Carmelites, Cistercians, Augustinian, etc. and the episcopate, there was the progressive adoption of the imperial symbol, the double-headed eagle, attribute of the Christian Empire, the germanic Holy Roman Empire emblem. However, in the religious field, this imperial eagle of the baroque time appears without the political insignia (sword, scepter and the imperial orb, adorning altars, monstrances, trumphal archs, facades of temples, doors, walls, domes, pulpits, sacred washbasins, sculptures and paintings of the Virgin and Child, liturgical robes, etc.; therefore related to the cult and the dogmas of the Catholic faith - in artistic works, the association between the double eagle and the flesh-spirit or human-divine unity, axial principle of the Catholic faith, represented by Virgin-Mother and Christ, is often indicated directly. The research has located and identified numerous remnants of the double eagle emblem in religious field in Portugal and Spain and in their conquests and dominions in America, Asia and Africa, and also in Italy, and the historiography on painful birth of the modern era in the West has never realized this phenomenon. Symbolizing absolute power, universal power, these works with sacred significance, as the ecclesiastical discourse of the time, demonstrate movement occurred in religious plane. With the aim to assert not only spiritual but also temporal power of Christ and his mystical body, the Church was impelled by the idea of restoring the "Republica Christiana" or Christendon - disrupted by conflicts of power and faith - and of introducing a Universal Apostolic Monarchy extended to all mankind: the Empire of the Last Days, the Empire of Christ in the world, the fifth Empire.

  16. Lo testimonial en la construcción de lo verosímil en la telenovela Montecristo. Un amor, una venganza

    Directory of Open Access Journals (Sweden)

    María Clara Musante

    2009-12-01

    Full Text Available Aborda las estrategias utilizadas por la telenovelas argentinas " Montecristi". Parte de la hipótesis de que esta ficción televisiva, que ha marcado un estilo nuevo dentro de la programación por su historia, estética, y producción ha incorporado en su relato una problemática histórica inédita para el género a través del registro de lo testimonial. Se trata de una primera aproximación teórica que busca fundamentar algunos aspectos poco trabajados como es el modo en que la telenovela definida como un relato ahistórico y volcado a contar el romance de la pareja central, gestiona ese pasaje por el cual se inscribe en el eje de su trama narrativa distintos aspectos de la historia reciente.

  17. O cumprimento do Objetivo Assegurar a Sustentabilidade Ambiental, dos Objetivos de Desenvolvimento do Milênio, no Vale do Taquari/RS

    Directory of Open Access Journals (Sweden)

    Cíntia Agostini

    2016-01-01

    Full Text Available Considered a recent discussion and controversy, sustainability is one of the topics discussed in con- temporary society. The current proposals pervade science, politics, economics, geography, territorial planning, other sciences and even common sense. Faced with such a condition, in the 2000s, the United Nations led the implementation of the Millennium Development Goals, in order to improve the quality of life of the population. The proposed objectives, one of which is MDG 7 - Ensure Envi- ronmental Sustainability. This article discusses the MDG 7 for municipalities Taquari Valley/RS and aims to identify how that is being fulfilled. It is a qualitative and quantitative research, which collected bibliographic and documentary data and process these took from the content analysis. Closed noting that the analysis of MDG 7 focuses, protection of natural resources and biodiversity, access to safe water, sanitation and improving the living conditions of the urban population, the main issue to be discussed and treated by municipalities is sanitation that the MDG 7 is partially met and that meeting the goals is not directly related to the Millennium Development Goals and yes, in the qualification and service of laws, policies and projects that promote the improvement of the population’s quality of life.

  18. Continuidad y discontinuidad : las revistas de arquitectura de Luigi Moretti y Ernesto Nathan Rogers en el Milán de la década de 1950

    Directory of Open Access Journals (Sweden)

    Orsina Simona Pierini

    2016-05-01

    Por tanto, sus éxitos son muy distintos: en el caso de Moretti la mente seguía la fascinación de sus arquitecturas, casi nunca publicadas en la revista, pero muy presentes por su fuerza icónica, mientras que en al caso del profesor Rogers, el legado parece confiarse a un lápiz, tan distinto del de sus amigos y alumnos.

  19. SUJETO Y MUNDO MATERIAL EN LA NARRATIVA CHILENA DEL NOVENTA Y EL DOS MIL: ESTOICOS, ESCÉPTICOS Y EPICúREOS

    Directory of Open Access Journals (Sweden)

    Ignacio Alvarez

    2012-11-01

    Full Text Available Resumen El artículo expone un criterio general para el análisis y la interpretación de las narraciones escritas y publicadas durante las últimas dos décadas en Chile. De acuerdo a la relación que textos y escrituras establecen con el mundo material, postula que puede hablarse de narraciones estoicas, escépticas y epicúreas. Los textos estoicos anhelan melancólicamente un contacto con las cosas que han perdido; los escépticos dudan de que ello sea posible; los epicúreos, que no distinguen entre percepción e imaginación, exasperan la propia producción simbólica como contacto con la producción material. Se coordina este criterio con otras clasificaciones del período, y se intenta bosquejar las proyecciones políticas que podría tener.Abstract The article presents a general approachfor the analysis and interpretation of Chilean narratives written and published during the past two decades. According to the relationship established with the material world, we postulate that writings and texts can be stoic, skeptical or epicurean. Stoic texts melancholically long for a contact with their lost objects, skeptical ones doubt that this is possible, and epicurean texts -which do not distinguish between perception and imagination-, exasperate .symbolic production as a contact with material production. This article coordinates this criterion with other classifications of the period, and also outlines the political projections that such criterion may bear.

  20. Cyrilometodějské milénium a česko-německé vztahy v Brně

    Czech Academy of Sciences Publication Activity Database

    Altman, Karel

    2013-01-01

    Roč. 23, č. 2 (2013), 93-98 ISSN 0862-8351 Institutional support: RVO:68378076 Keywords : Cyril and Methodius * inter-ethnic relations * Brno, Moravia Subject RIV: AC - Archeology, Anthropology, Ethnology

  1. Enfermagem obstétrica: contribuições às metas dos Objetivos de Desenvolvimento do Milênio

    Directory of Open Access Journals (Sweden)

    Thamiza da Rosa dos Reis

    Full Text Available RESUMO Objetivo Caracterizar e analisar a assistência ao parto e ao nascimento realizada por Residentes em Enfermagem Obstétrica. Método Estudo quantitativo e retrospectivo de 189 partos normais assistidos por Residentes em Enfermagem Obstétrica, no período de julho de 2013 a junho de 2014, em uma maternidade localizada no interior do Rio Grande do Sul. A coleta dos dados deu-se através de levantamento de informações dos prontuários clínicos e, para a análise, utilizou-se a estatística descritiva. Resultados Constatou-se o amplo uso de métodos não invasivos e não farmacológicos de alívio da dor e a liberdade de posição durante o trabalho de parto. Destaca-se que 55,6% das mulheres não foram submetidas a nenhuma intervenção obstétrica. Conclusões Foi possível identificar que o Programa de Residência em Enfermagem possibilita a redução de intervenções obstétricas, refletindo diretamente na melhoria da saúde materna.

  2. Field Demonstration of Aviation Turbine Fuel MIL-T-83133C, Grade JP-8 (NATO Code F-34), at Fort Bliss, TX

    Science.gov (United States)

    1992-09-01

    APO NY 09052 CDR US ARMY NATICK RD&E CTR DOD PROJ MGR, MOBILE ELECTRIC POWER ATTN: SATNC-US US ARMY TROOP SUPPORT COMMAND NATICK MA 01760-5020 ATUN ...US ARMY QUARTERMASTER SCHOOL ATUN : LOEA-PL (MR LeVAN) I ATTN: ATSM-CDM 1 NEW CUMBERLAND PA 17070 ATSM-PWD I FORT LEE VA 23801 PETROLEUM FIELD OFFICE...ARTILLERY CENTER US ARMY INFANTRY SCHOOL & FORT BLISS ATTN: ATSH-CD-MIS-M I ATUN : ATZC-ISL-PP 3 ATSH-CD-TSM-T 1 ATZC-ISL-MM 3 FORT BENNING GA 31905-5400

  3. Mil viisil olete puutunud kokku küberkiusamisega? / Piret Paadimeister, Ivika Aman, Lemme-Liis Aruväli ... [jt.

    Index Scriptorium Estoniae

    2011-01-01

    Küsimusele vastasid Paldiski gümnaasiumi õpetaja Piret Paadimeister, lapsevanem Ivika Aman, tudeng Lemme-Liis Aruväli, Tallinna Männiku lasteaia õpetaja Hedvig Kabonen, Nõmme põhikooli psühholoog Katri Viitpoom

  4. Expoentes mercantis e dinâmica de negócios: a família Dias de Milão (1580-1624)

    OpenAIRE

    Silvia Carvalho Ricardo

    2014-01-01

    A expansão marítima dos séculos XV e XVI reconfigurou as atividades mercantis na Europa e levou a difusão dos centros de comércio e das fontes de mercadorias em novas praças na Ásia, na América e na África. O trato transcontinental e as finanças, que ganharam complexidade, concretizaram-se nas relações entre as redes de comércio com atuação global. Portugal foi o nascedouro de grande parte dessas redes familiares que se multiplicaram e passaram a ter negócios em todas as frentes do trato colo...

  5. Lo verosímil en la ética de Aristóteles: una aporía en el vocabulario filosófico griego

    Directory of Open Access Journals (Sweden)

    Montoya, José

    2007-12-01

    Full Text Available While the mainstream of modern moral philosophy has always assumed that the characteristic situation in moral judgments should be the certitude, Aristotle’s moral philosophy is dominated by the idea of verisimilitude. As a matter of fact, its main concept, namely «virtue», is doubly permeated by this idea, both in its psychological and epistemological sides: we cannot know with certitude (only with verisimilitude what is entailed by the adscription of a virtue (e.g. generosity, both generally and in a particular case. Nevertheless, verisimilitude is a good enough ground for action.

    Mientras que la corriente principal de la filosofía moral moderna da por supuesto que la situación típica en los juicios morales debiera ser la de certeza, la filosofía moral de Aristóteles está dominada por la idea de verosimilitud. Su concepto central, el de virtud, está doblemente penetrado por aquella idea, tanto en su aspecto psicológico como en el epistemológico: no sabemos con certeza, sino sólo con probabilidad, en qué consiste por ejemplo la acción generosa en general ni tampoco en el caso concreto. Sin embargo, la verosimilitud es una base suficiente para la práctica.

  6. Defense Science Board 1986 Summer Study: Use of Commercial Components in Military Equipment

    Science.gov (United States)

    1987-01-01

    I 0 LU 0L c/) LU C- 0.. < o 0. Ui LU C FL/ zD 5 aZz z o C.0 0 cc U ~ ’ 4 i i 0 U-4 ZZ .J •-• go--’ E c : L -- 4 L- u z V 0 acca )0 V f.z ?A 4. CV...Guidebook Certify and Audit IC Suppliers Yes-Who? and Processes Use Industrial Plastic Encap- Partial sulated ICs in Selected Application Remove MIL...removal of precedence between IC selections. The first question concerns certification/ audit , specifically, who performs this function -- the

  7. Sulfur Isotope Composition of Some Polymetallic Deposits in the Republic of Macedonia

    International Nuclear Information System (INIS)

    Serafimovski, Todor; Tasev, Goran

    2005-01-01

    The attempt to obtain an exact information about the origin of sulfur and other metals present in polymetallic deposits at the territory of the Republic of Macedonia have resulted in a detailed sulfur isotope composition study, which have enclosed the following deposits: Toranica, Sasa, Zletovo, Buchim and Alshar deposit. Results obtained for the formerly mentioned deposits have shown that sulfur isotope composition β 34 S is in the range -7.52 to +2.18 per mils in Toranica, -1.22 -- +6.94 per mils in Sasa, -3.12 -- +3.40 per mils in Zletovo (without ore associated barites), +0.00 to +2.53 per mils in Buchim (the narrowest range of all studied deposits) and -6.84 to +0.351 per mils β 34 S in Alshar. Therefore, the most probably origin of primary sulfur in studied deposits from Earth's crust or eventually Upper Mantle. Such sources of sulfur and other mineralizing metals confirmed the theories about the endo gene origin of mineralization fluids, which have formed studied deposits. (Author)

  8. Study Proposal

    African Journals Online (AJOL)

    MATHEMATICS DEPARTMENT

    This cross sectional study design on mathematical syllabi at preparatory levels of the high schools was to ... Technology, Computer Science and Applied Sciences. It is studied of ..... For example, Jimma University Medical faculty students ...

  9. Initial Study

    DEFF Research Database (Denmark)

    Torp, Kristian

    2009-01-01

    increased. In the initial study presented here, the time it takes to pass an intersection is studied in details. Two major signal-controlled four-way intersections in the center of the city Aalborg are studied in details to estimate the congestion levels in these intersections, based on the time it takes...

  10. Game Studies

    NARCIS (Netherlands)

    Raessens, J.F.F.

    2016-01-01

    This entry describes game studies as a dynamic interdisciplinary field of academic study and research that focuses on digital games and play in a wide variety of social and cultural contexts. It examines the history of game studies from its prehistory, when games were looked at as part of other

  11. HTS Teologiese Studies / Theological Studies

    African Journals Online (AJOL)

    HTS Teologiese Studies/Theological Studies is an acclaimed Open Access journal with broad coverage that promotes multidisciplinary, religious, and biblical aspects of studies in the international theological arena. The journal's publication criteria are based on high ethical standards and the rigor of the methodology and ...

  12. Tomato (Lycopersicon esculentum) or lycopene supplementation attenuates ventricular remodeling after myocardial infarction through different mechanistic pathways.

    Science.gov (United States)

    Pereira, Bruna L B; Reis, Patrícia P; Severino, Fábio E; Felix, Tainara F; Braz, Mariana G; Nogueira, Flávia R; Silva, Renata A C; Cardoso, Ana C; Lourenço, Maria A M; Figueiredo, Amanda M; Chiuso-Minicucci, Fernanda; Azevedo, Paula S; Polegato, Bertha F; Okoshi, Katashi; Fernandes, Ana A H; Paiva, Sergio A R; Zornoff, Leonardo A M; Minicucci, Marcos F

    2017-08-01

    The objective of this study was to evaluate the influence of tomato or lycopene supplementation on cardiac remodeling after myocardial infarction (MI). Male Wistar rats were assigned to four groups: the sham group (animals that underwent simulated surgery) that received a standard chow (S; n=18), the infarcted group that received a standard chow (MI; n=13), the infarcted group supplemented with lycopene (1 mg of lycopene/kg body weight/day) (MIL; n=16) and the infarcted group supplemented with tomato (MIT; n=16). After 3 months, morphological, functional and biochemical analyses were performed. The groups MIL and MIT showed decreased interstitial fibrosis induced by infarction. Tomato supplementation attenuated the hypertrophy induced by MI. In addition, tomato and lycopene improved diastolic dysfunction evaluated by echocardiographic and isolated heart studies, respectively. The MI group showed higher levels of cardiac TNF-α compared to the MIL and MIT groups. Decreased nuclear factor E2-related factor 2 was measured in the MIL group. Lipid hydroperoxide levels were higher in the infarcted groups; however, the MIT group had a lower concentration than did the MI group [S=223±20.8, MI=298±19.5, MIL=277±26.6, MIT=261±28.8 (nmol/g); n=8; Ptomato or lycopene supplementation attenuated the cardiac remodeling process and improved diastolic function after MI. However, the effect of lycopene and tomato supplementation occurred through different mechanistic pathways. Copyright © 2017 Elsevier Inc. All rights reserved.

  13. Long-term efficacy and cost-effectiveness of polyethylene glycol 3350 plus electrolytes in chronic constipation: a retrospective study in a disabled population.

    Science.gov (United States)

    Migeon-Duballet, I; Chabin, M; Gautier, A; Mistouflet, T; Bonnet, M; Aubert, J M; Halphen, M

    2006-06-01

    The efficacy and safety of treatments for constipation in severely intellectually disabled patients and their associated cost-effectiveness are an under-investigated area of clinical practice. Aiming to address this, the objectives of the study were to evaluate the efficacy and tolerability of polyethylene glycol 3350 plus electrolytes (Movicol; PEG+E) by comparing clinical data collected before and after its introduction to a stable population of residents of a mental health care, long-stay institution. The study also attempted an economic evaluation of the use of PEG+E in this setting. This was a retrospective study of 54/66 severely intellectually and physically disabled residents of a specialist unit at La Milétrie University Hospital, Poitiers, France, who suffered regularly from constipation. A total of 54 residents were treated with PEG+E (1-3 sachets a day) for 24 months. The number of stools, episodes of diarrhoea (defined as frequent stools, not necessarily watery), body weights and blood biochemistry were recorded. Data were compared with those recorded during the 21 months preceding the introduction of PEG+E for 16/54 residents who had been treated regularly with a range of other interventions for the relief of constipation. The monthly use and costs of laxatives, enemas and suppositories was obtained from hospital pharmacy records, and the total hospital costs before and after the introduction of PEG+E treatment was calculated. The mean (+/- standard deviation) number of stools per patient per month was significantly greater following the introduction of PEG+E (24.9 +/- 6.3) compared to before its use (12.4 +/- 3.4) (p PEG+E was 0.1 +/- 0.1 and 6.3 +/- 2.9, respectively (p PEG+E was not associated with adverse effects on body weight or blood biochemistry values. Introduction of PEG+E and its increasing use reduced the total hospital medical ward expenditure on laxatives from 3788 to 1767 Euros per month. PEG+E is effective in the clinical management

  14. Study protocol

    DEFF Research Database (Denmark)

    Thorsteinsson, Troels; Helms, Anne Sofie; Adamsen, Lis

    2013-01-01

    , and problems related to interaction with peers. Methods/design The RESPECT study is a nationwide population-based prospective, controlled, mixed-methods intervention study looking at children aged 6-18 years newly diagnosed with cancer in eastern Denmark (n = 120) and a matched control group in western Denmark......, and one year after the cessation of treatment. The study is powered to quantify the impact of the combined educational, physical, and social intervention programs. Discussion RESPECT is the first population-based study to examine the effect of early rehabilitation for children with cancer, and to use...

  15. Absorption studies

    International Nuclear Information System (INIS)

    Ganatra, R.D.

    1992-01-01

    Absorption studies were once quite popular but hardly anyone does them these days. It is easier to estimate the blood level of the nutrient directly by radioimmunoassay (RIA). However, the information obtained by estimating the blood levels of the nutrients is not the same that can be obtained from the absorption studies. Absorption studies are primarily done to find out whether some of the essential nutrients are absorbed from the gut or not and if they are absorbed, to determine how much is being absorbed. In the advanced countries, these tests were mostly done to detect pernicious anaemia where vitamin B 12 is not absorbed because of the lack of the intrinsic factor in the stomach. In the tropical countries, ''malabsorption syndrome'' is quire common. In this condition, several nutrients like fat, folic acid and vitamin B 12 are not absorbed. It is possible to study absorption of these nutrients by radioisotopic absorption studies

  16. Clinical Studies

    DEFF Research Database (Denmark)

    Pallesen, Ulla

    universities and practicing dentists restore millions of teeth throughout the World with composite resin materials. Do we know enough about the clinical performance of these restorations over time? Numerous in vitro studies are being published on resin materials and adhesion, some of them attempting to imitate...... in vivo conditions. But real life is different and in vitro studies cannot include all variables. Only clinical studies can provide valid information on the clinical performance of restorations over time. What do we know about longevity of posterior resin restorations? What are the reasons for replacement...... and results from own up to 30-year prospective clinical university studies and practice based studies from Public Dental Health Service on the clinical performance of posterior composite resin restorations....

  17. Mitochondrial Proteomics of Antimony and Miltefosine Resistant Leishmania infantum

    Directory of Open Access Journals (Sweden)

    Isabel M. Vincent

    2015-10-01

    Full Text Available Antimony (SbIII and miltefosine (MIL are important drugs for the treatment of Leishmania parasite infections. The mitochondrion is likely to play a central role in SbIII and MIL induced cell death in this parasite. Enriched mitochondrial samples from Leishmania promastigotes selected step by step for in vitro resistance to SbIII and MIL were subjected to differential proteomic analysis. A shared decrease in both mutants in the levels of pyruvate dehydrogenase, dihydrolipoamide dehydrogenase, and isocitrate dehydrogenase was observed, as well as a differential abundance in two calcium-binding proteins and the unique dynamin-1-like protein of the parasite. Both mutants presented a shared increase in the succinyl-CoA:3-ketoacid-coenzyme A transferase and the abundance of numerous hypothetical proteins was also altered in both mutants. In general, the proteomic changes observed in the MIL mutant were less pronounced than in the SbIII mutant, probably due to the early appearance of a mutation in the miltefosine transporter abrogating the need for a strong mitochondrial adaptation. This study is the first analysis of the Leishmania mitochondrial proteome and offers powerful insights into the adaptations to this organelle during SbIII and MIL drug resistance.

  18. Multiple instance learning tracking method with local sparse representation

    KAUST Repository

    Xie, Chengjun

    2013-10-01

    When objects undergo large pose change, illumination variation or partial occlusion, most existed visual tracking algorithms tend to drift away from targets and even fail in tracking them. To address this issue, in this study, the authors propose an online algorithm by combining multiple instance learning (MIL) and local sparse representation for tracking an object in a video system. The key idea in our method is to model the appearance of an object by local sparse codes that can be formed as training data for the MIL framework. First, local image patches of a target object are represented as sparse codes with an overcomplete dictionary, where the adaptive representation can be helpful in overcoming partial occlusion in object tracking. Then MIL learns the sparse codes by a classifier to discriminate the target from the background. Finally, results from the trained classifier are input into a particle filter framework to sequentially estimate the target state over time in visual tracking. In addition, to decrease the visual drift because of the accumulative errors when updating the dictionary and classifier, a two-step object tracking method combining a static MIL classifier with a dynamical MIL classifier is proposed. Experiments on some publicly available benchmarks of video sequences show that our proposed tracker is more robust and effective than others. © The Institution of Engineering and Technology 2013.

  19. Multivariate Metal-Organic Frameworks for Dialing-in the Binding and Programming the Release of Drug Molecules.

    Science.gov (United States)

    Dong, Zhiyue; Sun, Yangzesheng; Chu, Jun; Zhang, Xianzheng; Deng, Hexiang

    2017-10-11

    We report the control of guest release profiles by dialing-in desirable interactions between guest molecules and pores in metal-organic frameworks (MOFs). The interactions can be derived by the rate constants that were quantitatively correlated with the type of functional group and its proportion in the porous structure; thus the release of guest molecules can be predicted and programmed. Specifically, three probe molecules (ibuprofen, rhodamine B, and doxorubicin) were studied in a series of robust and mesoporous MOFs with multiple functional groups [MIL-101(Fe)-(NH 2 ) x , MIL-101(Fe)-(C 4 H 4 ) x , and MIL-101(Fe)-(C 4 H 4 ) x (NH 2 ) 1-x ]. The release rate can be adjusted by 32-fold [rhodamine from MIL-101(Fe)-(NH 2 ) x ], and the time of release peak can be shifted by up to 12 days over a 40-day release period [doxorubicin from MIL-101(Fe)-(C 4 H 4 ) x (NH 2 ) 1-x ], which was not obtained in the physical mixture of the single component MOF counterparts nor in other porous materials. The corelease of two pro-drug molecules (ibuprofen and doxorubicin) was also achieved.

  20. Hydrogeological study

    International Nuclear Information System (INIS)

    Massa, E.; Carrion, R.

    1987-01-01

    This work refers to the hydrogeological study about underground water to domestic uses. It was required by Artigas intendence of Uruguay, in the rural school 10, located belongs to the Chiflero zone around the capital of the Artigas Province.

  1. Feasibility study

    International Nuclear Information System (INIS)

    Gibbs, P.; Kalas, P.

    1975-01-01

    The feasibility study itself examines the technical, economic and financial implications of a nuclear power station in depth so as to make sure that nuclear power is the right course to take. This means that it is quite an expensive operation and it is to avoid wasting this money that a pre-feasibility study is carried out. This preliminary study should eliminate cases where the electrical system cannot absorb the capacity of a nuclear station of commercial size, where other sources of power such as hydro-electricity, gas or cheap coal would make nuclear obviously uneconomic or where no suitable sites exist. If this first rather simple survey shows that nuclear power is a credible solution to a utilities need for electricity or heat production plant, then the next stage is a full feasibility study. (orig./TK) [de

  2. INTERHEART STUDY

    Indian Academy of Sciences (India)

    First page Back Continue Last page Overview Graphics. INTERHEART STUDY. About 90% of CHD Risk (“PAR”) can be explained by 9 Risk Factors: Smoking. Dyslipidemia. High BP. Diabetes. Abdominal Obesity. Psychosocial Factors. Fruits & Vegetables. Exercise. Alcohol.

  3. Study Drugs

    Science.gov (United States)

    ... to quit, they may have withdrawal symptoms like depression, thoughts of suicide, intense drug cravings, sleep problems, and fatigue. The health risks aren't the only downside to study drugs. Students caught with illegal prescription drugs may get suspended ...

  4. Environmental studies

    International Nuclear Information System (INIS)

    Mohd Tadza Abd Rahman

    2003-01-01

    Nuclear Technology offers unique method, yet effective for environmental research. Nuclear techniques are invented to carry out research activities on environmental pollutions, erosion and slope stability, landslide ground water studies and water pollution

  5. Floodplain Study

    Data.gov (United States)

    Montgomery County of Maryland — The purpose of a floodplain study is to establish the 100-year floodplain limits within or near a development in order to preserve the natural resources within the...

  6. Creole Studies

    DEFF Research Database (Denmark)

    This book launches a new approach to creole studies founded on phylogenetic network analysis. Phylogenetic approaches offer new visualisation techniques and insights into the relationships between creoles and non-creoles, creoles and other contact varieties, and between creoles and lexifier...... languages. With evidence from creole languages in Africa, Asia, the Americas, and the Pacific, the book provides new perspectives on creole typology, cross-creole comparisons, and creole semantics. The book offers an introduction for newcomers to the fields of creole studies and phylogenetic analysis. Using...... these methods to analyse a variety of linguistic features, both structural and semantic, the book then turns to explore old and new questions and problems in creole studies. Original case studies explore the differences and similarities between creoles, and propose solutions to the problems of how to classify...

  7. Actuarial Studies

    Data.gov (United States)

    U.S. Department of Health & Human Services — The Office of the Actuary in the Centers for Medicare and Medicaid Services (CMS) from time to time conducts studies on various aspects of the Medicare and Medicaid...

  8. ARHCO studies

    International Nuclear Information System (INIS)

    Rogers, L.E.

    1977-01-01

    Ecological studies at the Hanford Reservation are designed to clarify ecosystem structure and function in and near the radioactive waste management areas. To date, emphasis has been placed on characterizing the abiotic and biotic components of these areas. During the current year, deer, raptors, coots, and mice have been under active study with respect to their potential for dissemination of radioactivity from pond or burial locations via feeding

  9. European Studies

    Directory of Open Access Journals (Sweden)

    V. O. Pechatnov

    2014-01-01

    Full Text Available The study of Western countries and teaching courses on the related subjects have longstanding and established tradition at MGIMO-University. The basis of this brilliant research and teaching tradition was laid down by such academicians as E.V. Tarle and V.G. Trukhanovsky, Professor L.I. Clove, Y. Borisov, F.I. Notovitch, G.L. Rozanov. Their work in 1940-1960's at the Department of World History at MGIMO-University progressed in following directions: France studies, German studies, American studies. The work resulted in a number of monographs and textbooks on modern history and foreign policy of the studied countries and regions. The aim of the publications was dictated by the goal of the Institute - to prepare the specialists in international affairs primarily for practical work. A close relationship with the Foreign Ministry was "binding advantage" sometimes limiting researchers in choosing periods and subjects for the study. At the same time the undisputed advantage and quality of regional studies at MGIMO were strengthened by the practical relevance of research, making it a vital and interesting not only for specialists but also for students and researchers from other research centers. Another characteristic of the tradition is the analysis of foreign policy and diplomacy in a close relationship with the socio-economic and political processes. Such an integrated approach to regional geography also formed largely under the influence of institutional profile designed to train highly skilled and versatile specialists in specific countries and regions with a good knowledge of their languages, history, economics, politics, law and culture. Therefore, scientific and educational-methodical work at MGIMO-University has always relied on a wealth of empirical data and has been focused on the analysis of real-world phenomena and processes, acute problems of foreign countries. Scientific research at MGIMO-University traditionally intertwined with

  10. Club studies

    DEFF Research Database (Denmark)

    Demant, Jakob Johan; Ravn, Signe; Harder, Sidsel Kirstine

    2010-01-01

    Club studies are sociological investigations of youth drug use in the social situation of the club. By being present at the club the researcher tries to gain access to a somehow hidden population of drug users who only to a lesser extent perceive their drug use as problematic. In spite of impress......Club studies are sociological investigations of youth drug use in the social situation of the club. By being present at the club the researcher tries to gain access to a somehow hidden population of drug users who only to a lesser extent perceive their drug use as problematic. In spite...... of impressive club studies conducted in both Great Britain and in the United States, it seems that, broadly speaking, previous efforts can be characterized as either very broad and/or quantitative or very particular, sub-cultural and exclusively qualitative. Through a review of these studies, this article...... suggests a mixed-methods approach to club studies that combine quantitative data, qualitative interviews and ethnography conducted in the club space. By introducing the concept of ‘socionautics', this review suggests that the researcher travels into the social landscape of youth, clubs and drugs...

  11. Studying Sideways

    DEFF Research Database (Denmark)

    Plesner, Ursula

    2011-01-01

    inequalities in relation to the people we study. This article argues that not all types of social scientific research interviews benefit from an à priori problematization of power and control, ethics and equality, or emancipation. From a constructivist perspective, the article seeks to displace......, we must cultivate interview methods which cause confrontation and disagreement—not to acknowledge asymmetry but to enhance the quality of research.......One strand of the qualitative interview literature has been concerned with the normative or otherwise problematic implications of studying down or studying up (i.e., interviewing “disadvantaged” people or elites). This interview literature is part of a tradition of taking up the problem of power...

  12. Invisibility Studies

    DEFF Research Database (Denmark)

    Invisibility Studies explores current changes in the relationship between what we consider visible and what invisible in different areas of contemporary culture. Contributions trace how these changes make their marks on various cultural fields and investigate the cultural significance of these de......Invisibility Studies explores current changes in the relationship between what we consider visible and what invisible in different areas of contemporary culture. Contributions trace how these changes make their marks on various cultural fields and investigate the cultural significance...... conditioned by physical and social settings that create certain possibilities for visibility and visuality, yet exclude others. The richness and complexity of this cultural framework means that no single discipline or interdisciplinary approach could capture it single-handedly. Invisibility Studies begins...

  13. Project studies

    DEFF Research Database (Denmark)

    Geraldi, Joana; Söderlund, Jonas

    2018-01-01

    Project organising is a growing field of scholarly inquiry and management practice. In recent years, two important developments have influenced this field: (1) the study and practice of projects have extended their level of analysis from mainly focussing on individual projects to focussing on micro......, and of the explanations of project practices they could offer. To discuss avenues for future research on projects and project practice, this paper suggests the notion of project studies to better grasp the status of our field. We combine these two sets of ideas to analyse the status and future options for advancing...... project research: (1) levels of analysis; and (2) type of research. Analysing recent developments within project studies, we observe the emergence of what we refer to as type 3 research, which reconciles the need for theoretical development and engagement with practice. Type 3 research suggests pragmatic...

  14. Technology-enhanced instruction in learning world languages: The Middlebury interactive learning program

    Directory of Open Access Journals (Sweden)

    Cynthia Lake

    2015-03-01

    Full Text Available Middlebury Interactive Language (MIL programs are designed to teach world language courses using blended and online learning for students in kindergarten through grade 12. Middlebury Interactive courses start with fundamental building blocks in four key areas of world-language study: listening comprehension, speaking, reading, and writing. As students progress through the course levels, they deepen their understanding of the target language, continuing to focus on the three modes of communication: interpretive, interpersonal, and presentational. The extensive use of authentic materials (video, audio, images, or texts is intended to provide a contextualized and interactive presentation of the vocabulary and the linguistic structures. In the present paper, we describe the MIL program and the results of a mixed-methods survey and case-study evaluation of its implementation in a broad sample of schools. Technology application is examined with regard to MIL instructional strategies and the present evaluation approach relative to those employed in the literature.

  15. Intratracheal Milrinone Bolus Administration During Acute Right Ventricular Dysfunction After Cardiopulmonary Bypass.

    Science.gov (United States)

    Gebhard, Caroline Eva; Desjardins, Georges; Gebhard, Cathérine; Gavra, Paul; Denault, André Y

    2017-04-01

    To evaluate intratracheal milrinone (tMil) administration for rapid treatment of right ventricular (RV) dysfunction as a novel route after cardiopulmonary bypass. Retrospective analysis. Single-center study. The study comprised 7 patients undergoing cardiac surgery who exhibited acute RV dysfunction after cardiopulmonary bypass. After difficult weaning caused by cardiopulmonary bypass-induced acute RV dysfunction, milrinone was administered as a 5-mg bolus inside the endotracheal tube. RV function improvement, as indicated by decreasing pulmonary artery pressure and changes of RV waveforms, was observed in all 7 patients. Adverse effects of tMil included dynamic RV outflow tract obstruction (2 patients) and a decrease in systemic mean arterial pressure (1 patient). tMil may be an effective, rapid, and easily applicable therapeutic alternative to inhaled milrinone for the treatment of acute RV failure during cardiac surgery. However, sufficiently powered clinical trials are needed to confirm these findings. Copyright © 2017 Elsevier Inc. All rights reserved.

  16. Project Learning and Virtual Collaboration

    DEFF Research Database (Denmark)

    Fibiger, Bo; Nielsen, Janni; Sorensen, Elsebeth

    2005-01-01

    to the modularity and flexibility that characterize the study and allow admission of part-time students, full-time students and students who only sign up for one accredited module. The methodology will be illustrated through empirical snapshots from selected modules in the start-up phase, and the focus...... will be directed towards problems experienced by the students. From an analytical perspective, the paper will identify and discuss fundamental problems related to the organization, flexibility, and implementation of project pedagogy online. MIL is organized around ICT and Learning and the study theme focuses...... on ICT and Learning. In addition, MIL provides a learning space where practice is under constant negotiation and reconstruction as an inherent, integrated part of the learning process. Consequently, we argue that MIL may be seen as an example of best practice in blended learning....

  17. Computational modeling of Metal-Organic Frameworks

    Science.gov (United States)

    Sung, Jeffrey Chuen-Fai

    In this work, the metal-organic frameworks MIL-53(Cr), DMOF-2,3-NH 2Cl, DMOF-2,5-NH2Cl, and HKUST-1 were modeled using molecular mechanics and electronic structure. The effect of electronic polarization on the adsorption of water in MIL-53(Cr) was studied using molecular dynamics simulations of water-loaded MIL-53 systems with both polarizable and non-polarizable force fields. Molecular dynamics simulations of the full systems and DFT calculations on representative framework clusters were utilized to study the difference in nitrogen adsorption between DMOF-2,3-NH2Cl and DMOF-2,5-NH 2Cl. Finally, the control of proton conduction in HKUST-1 by complexation of molecules to the Cu open metal site was investigated using the MS-EVB methodology.

  18. Study protocol

    DEFF Research Database (Denmark)

    Smith, Benjamin E; Hendrick, Paul; Bateman, Marcus

    2017-01-01

    avoidance behaviours, catastrophising, self-efficacy, sport and leisure activity participation, and general quality of life. Follow-up will be 3 and 6 months. The analysis will focus on descriptive statistics and confidence intervals. The qualitative components will follow a thematic analysis approach....... DISCUSSION: This study will evaluate the feasibility of running a definitive large-scale trial on patients with patellofemoral pain, within the NHS in the UK. We will identify strengths and weaknesses of the proposed protocol and the utility and characteristics of the outcome measures. The results from...... this study will inform the design of a multicentre trial. TRIAL REGISTRATION: ISRCTN35272486....

  19. Study Drugs

    OpenAIRE

    Lam, Stephanie Phuong; Roosta, Natalie; Nielsen, Mikkel Fuhr; Meyer, Maria Holmgaard; Friis, Katrine Birk

    2016-01-01

    In recent years, students around the world, started to use preparations as Ritalin and Modafinil,also known as study drugs, to improve their cognitive abilities1. It is a common use among thestudents in United States of America, but it is a new tendency in Denmark. Our main focus is tolocate whether study drugs needs to be legalized in Denmark or not. To investigate this ourstarting point is to understand central ethical arguments in the debate. We have chosen twoarguments from Nick Bostrom a...

  20. Security studies

    International Nuclear Information System (INIS)

    Venot, R.

    2001-01-01

    Full text: Security studies constitute one of the major tools for evaluating the provisions implemented at facilities to protect and control Nuclear Material against unauthorized removal. Operators use security studies to demonstrate that they are complying with objectives set by the Competent Authority to counter internal or external acts aimed at unauthorized removal of NM. The paper presents the context of security studies carried out in France. The philosophy of these studies is based on a postulated unauthorized removal of NM and the study of the behavior of the systems implemented to control and protect NM in a facility. The potential unauthorized removal of NM usually may take place in two stages. The first stage involves the sequence leading to handling of the NM. It occurs inside the physical barriers of a facility and may include action involving the documents corresponding to Material Control and Accounting systems. At this stage it is possible to limit the risk of unauthorized removal of NM by means of detection capabilities of the MC and A systems. The second stage is more specific to theft and involves removing the NM out of the physical barriers of a facility in which they are being held, notably by affecting the Physical Protection System. Operators have to study, from a quantity and time lapse point of view, the ability of the installed systems to detect unauthorized removal, as well as the possibility of tampering with the systems to mask unlawful operations. Operators have also to analyze the sequences during which NM are accessed, removed from their containment and further removed from the facility in which they are stored. At each stage in the process, the probability of detection and the time taken to carry out the above actions have to be estimated. Of course, these two types of studies complement each other. Security studies have begun, in France, for more than fifteen years. Up to now more than fifty security studies are available in the