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Sample records for mineral nanoparticulada nas

  1. CARACTERIZACIÓN DE PROTEÍNAS Y CONTENIDO MINERAL DE DOS VARIEDADES NATIVAS DE FRIJOL DE MÉXICO

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    Juan Carlos Raya-P\\u00E9rez

    2014-01-01

    Full Text Available El objetivo de este trabajo fue caracterizar a nivel bioquímico la semilla de dos variedades mexicanas de frijol, Bayo Berrendo y Patzcuareño. En el año 2011, en Celaya, México, se extrajeron proteínas de reserva de las dos variedades criollas de frijol (Phaseolus vulgaris, con el fin de obtener sus perfiles electroforéticos. El contenido de proteína soluble en el caso de Bayo Berrendo fue de 16,47% y 14,53% para el Patzcuareño. Se detectaron diferencias en el patrón electroforético, sobre todo en la fracción de albúminas, que permitió di- ferenciar las variedades. La harina presentó alta actividad inhibitoria contra tripsina, principalmente en la fracción de faseolinas, 355 unidades en el Bayo Berrendo y 507 unidades en el Patzcuareño. Se determinó la composición elemental de la harina observándose diferencias en cuanto al contenido mineral. El Bayo Berrendo tiene un contenido de 0,15% de Ca, 5,53% de K y 0,60% de Mg. Los valores respectivos para el Patzcuareño fueron: 0,17%, 3,52% y 0,67%. El Bayo posee 18,8 ppm de Fe y el Patzcuareño 3,63 ppm. Se midieron otras variables relacionadas con su utilización con fines alimenticios, como capacidad de absorción de agua, con valores cercanos al 100% y tiempos de cocción menores a 110 min. Fenotípicamente las dos variedades se distinguen fácilmente, tanto en tamaño de semilla como en color. El peso de 100 semillas del Bayo Berrendo fue de 14,6 g y del Patzcuareño 32,6 g.

  2. Os atributos nas folhas são mais eficientes que o N mineral no solo para avaliar a disponibilidade desse nutriente para o milho

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    Vitor Paulo Vargas

    2012-01-01

    Full Text Available Na Região Sul do Brasil, a disponibilidade de N para o milho é inferida a partir do teor de matéria orgânica do solo sem nenhuma consideração para os teores de N mineral existentes no solo ou nas folhas. O objetivo deste trabalho foi estudar a eficiência de parâmetros de solo (teores de N-NO3- e N-NH4+, e de planta (N total no tecido, clorofilas, índice relativo de clorofila, como indicadores da disponibilidade de N durante a ontogenia do milho, submetido a doses de N e épocas de aplicação da cobertura nitrogenada. O experimento foi realizado em Lages, Santa Catarina, na safra 2008/2009. Utilizou-se o delineamento experimental de blocos casualizados em parcelas subdivididas. Na parcela principal foram testadas quatro doses de N: 0, 50, 100 e 200 kg ha-1 e nas subparcelas, avaliadas duas épocas de aplicação do N em cobertura: todo o N quando o milho tinha quatro ou oito folhas expandidas, metade da dose quando o milho tinha quatro e metade quando havia oito folhas expandidas. As avaliações foram efetuadas entre o estádio de seis folhas expandidas e o espigamento. Os teores das formas de N no solo não apresentaram relação com o rendimento de grãos ou com as características de planta avaliadas em nenhum dos estádios de avaliação, sendo, portanto, inadequados para predizer a disponibilidade de N para o milho. O rendimento de grãos não esteve relacionado ao índice relativo de clorofila e ao teor de N total nas folhas na fase inicial de desenvolvimento, porém correlacionou-se com eles a partir da avaliação realizada na nona folha expandida. As características de planta foram mais adequadas do que os parâmetros de solo para predizer a disponibilidade de N ao milho e o rendimento de grãos da cultura.

  3. Estudo da influência da adição de cinzas de carvão mineral nas propriedades da cerâmica vermelha

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    T. L. Zanin

    2013-06-01

    Full Text Available A adição de resíduos industriais em cerâmicas vermelhas tem sido o alvo de diversos estudos, onde se busca uma destinação final adequada ao resíduo e melhoria das características da cerâmica. Neste trabalho, avaliou-se a adição de cinzas leves de carvão mineral oriundas de uma usina termelétrica existente em Figueira, PR. Foram preparadas misturas de 0, 10, 20, 30, 40 e 50% de cinzas em argila e produzidos corpos de prova de 6 cm x 2 cm x 0,5 cm por calcinação a 950 ºC. Avaliou-se os parâmetros perda ao fogo, densidade aparente, porosidade aparente, retração linear, absorção de água e resistência mecânica. Os resultados dos ensaios indicaram que influência do material incombusto presentes nas cinzas foi superior a qualquer efeito dos outros componentes das cinzas.

  4. Minerals

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    Vaquero, M. P.

    1998-08-01

    Full Text Available The possible changes in the mineral composition of food during frying could be the consequence of losses by leaching, or changes in concentrations caused by exchanges between the food and culinary fat of other compounds. The net result depends on the type of food, the frying fat used and the frying process. Moreover, the modifications that frying produces in other nutrients could indirectly affect the availability of dietary minerals. The most outstanding ones are those that can take place in the fat or in the protein. With respect to the interactions between frying oils and minerals, we have recent knowledge concerning the effects of consuming vegetable oils used in repeated fryings of potatoes without turnover, on the nutritive utilization of dietary minerals. The experiments have been carried out in pregnant and growing rats, which consumed diets containing, as a sole source of fat, the testing frying oils or unused oils. It seems that the consumption of various frying oils, with a polar compound content lower or close to the maximum limit of 25% accepted for human consumption, does not alter the absorption and metabolism of calcium, phosphorous, iron or copper. Magnesium absorption from diets containing frying oils tends to increase but the urinary excretion of this element increases, resulting imperceptible the variations in the magnesium balance. The urinary excretion of Zn also increased although its balance remained unchanged. Different studies referring to the effects of consuming fried fatty fish on mineral bioavailability will also be presented. On one hand, frying can cause structural changes in fish protein, which are associated with an increase in iron absorption and a decrease in body zinc retention. The nutritive utilization of other elements such as magnesium, calcium and copper seems to be unaffected. On the other hand; it has been described that an excess of fish fatty acids in the diet produces iron depletion, but when fatty

  5. ACÚMULO DE NUTRIENTES NAS PLANTAS DE MILHETO EM FUNÇÃO DA ADUBAÇÃO ORGÂNICA E MINERAL

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    Wladimir Nicolau Sobrinho

    2009-01-01

    Full Text Available A field experiment was carried out at the UFCG/CSTR Experimental Station NUPEARIDO in order to evaluate the influence of organic and mineral fertilization on pearl millet (Pennisetum glaucum L. production. After plot demarcation, macassar bean was sown and incorporated in the soil in the respective plots after x days of plant development. Treatments were control, green manure, NPK, cattle manure or goat manure, with four replications, totaling 20 plots, each one with 8 m2 of net inner area. Pear millet plants were grown in a 0.8 x 0.4 m2 grid. Cattle or goat manure was applied at a rate of 3.4 kg m-2, green manure at a rate of 12.5 kg plot-1, and the mineral source consisted of 25.2 g m-2 of ammonium sulphate, 22.2 g m-2 of single superphosphate and 3.3 g m-2 of potassium chloride. Plants were cut 60 days after seeding to evaluate N, P, K, Ca, Mg, S, B, Fe, Cu, Mn, and Zn accumulation. Fertilization with cattle or goat manure promoted more nutrient accumulation pearl millet plants.

  6. Macrominerais para bovinos de corte nas pastagens nativas dos Campos de Cima da Serra - RS Macro minerals to beef cattle in the native pastures of Campos de Cima da Serra - RS, Brazil

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    Carolina Wunsch

    2006-08-01

    Full Text Available Em face das poucas informações disponíveis sobre a composição mineral das pastagens nativas da região dos Campos de Cima da Serra (RS, o presente trabalho de pesquisa objetivou avaliar os teores dos principais macrominerais, em diferentes épocas do ano, e relacionar o perfil mineral destas pastagens com as necessidades nutricionais recomendadas pelo NRC (1996 para bovinos de corte. O projeto foi conduzido em vinte propriedades particulares, em Cambará do Sul, utilizando áreas de campo nativo que estavam sendo normalmente utilizadas em pastoreio por bovinos de corte e/ou ovinos e que não tinham sofrido nenhum tipo de melhoria, reforma ou recuperação (exceto queimada, no mínimo nos últimos 20 anos. Colheram-se, durante oito meses, e dentro de uma mesma área predeterminada em cada propriedade, amostras para determinar as concentrações de Ca, P, Mg, Na e S. Verificou-se efeito do mês de coleta sobre todos os minerais analisados. Foram constatados teores suficientes de Ca e Mg para as categorias de bovinos de corte menos exigentes. Os teores de Mg são deficientes para vacas em gestação e lactação e os teores de Ca são deficientes para terneiros. Por outro lado, os teores de P, Na e S apresentaram-se abaixo das exigências mínimas para as categorias de bovinos de corte avaliadas.The present study was conducted to determine the mineral status of natural range pastures of Campos de Cima da Serra region, State of Rio Grande do Sul, Brazil, in different months of the year, to compare them to beef cattle requirements (NRC, 1996. The project was led in twenty private farms, in Cambará do Sul county, on grazing areas without improvements (except burning at the last twenty years. Pasture samples were collected at January, February, March April, May, July, September and December to determine its calcium, phosphorus, magnesium, sodium and sulphur levels. Effect of the season was verified on all analyzed minerals. The Ca and Mg contents

  7. Influência da nutrição mineral foliar nas doenças da parte aérea e no rendimento da cultura da soja / Foliar nutrition influence over soybean aerial part diseases and yield crop

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    Idalmir Santos

    2011-08-01

    Full Text Available Este trabalho objetivou avaliar o efeito da nutrição mineral foliar sobre a incidência e severidade de oídio e ferrugem da soja, bem com a sua influência nos componentes de rendimento e a desfolha da cultura. O delineamento experimental foi em blocos casualizados com cinco repetições e quatro tratamentos: 1- testemunha; 2- adubação foliar aos 30 e 60 dias, após a emergência (DAE; 3- fungicida aos 60 DAE; 4- adubação foliar aos 30 DAE e fungicida + nutrientes aos 60 DAE. Realizaram-se as seguintes avaliações: incidência e severidade de oídio e ferrugem da soja, produtividade, número de sementes por vagem, número de vagens por planta, peso de 100 sementes e porcentagem de desfolha. A aplicação foliar de nutrientes isoladamente não influenciou na incidência e severidade de oídio, contudo, incrementou a produtividade de grãos. Quando os nutrientes foram aplicados com fungicida, houve redução tanto na incidência como na severidade das doenças em relação à aplicação de fungicida isoladamente. A adubação foliar proporcionou redução da desfolha e aumento do número de vagens por planta, sendo este último o maior responsável pelo aumento da produtividade. Pode-se concluir que a adubação foliar potencializou o efeito do fungicida, reduzindo a intensidade das doenças e aumentando a produtividade da cultura. AbstractFungicide application is the main form of soybean crop disease control. However, other measures should be adopted as part of control strategy, such as for example, resistance induction by means of plant mineral nutrition. Therefore, this work aimed to evaluate foliar mineral nutrition effects on incidence and severity of soybean oidium and rust, as well as its influence over yield compounds and culture defoliation. Experimental delineation was in randomized blocks design with five replications and four treatments: 1- witness; 2- foliar fertilization at 30 and 60 days after emergence (DAE; 3- fungicide

  8. METABOLIC EVALUATIONS IN PIGS WITH MICRO MINERAL AND VITAMINS WITHDRAWAL, INORGANIC PHOSPHORUS REDUCTION AND PHYTASE SUPPLEMENTATION AVALIAÇÃO METABÓLICA DA REDUÇÃO DE FÓSFORO INORGÂNICO E SUPRESSÃO DE MICROMINERAIS E VITAMÍNAS EM DIETAS COM FITASE PARA SUÍNOS

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    Moema Pacheco Chediak Matos

    2008-04-01

    Full Text Available The experiment aimed to evaluate the effects of diets without micro minerals and vitamins, reduced inorganic phosphorus levels and phytase addition in bone metabolism and renal and hepatic functions in finishing pigs. Forty eight 105-day old females were randomly allotted in six groups: standard diets (T1, composed of corn, soybean meal and wheat meal; standard ration without micro mineral and vitamin supplement (T2; T2 ration with phytase (T3 T2 ration reducing 1/3 of inorganic P with phytase (T4, T2 ration reduced 2/3 of inorganic P with phytase (T5 and T2 ration with complete reduction of inorganic P with phytase (T6. The experiment was carried out in two phases: phase 1: 24 animals slaughtered at 150 days of age (106.65 kg; and phase 2: 24 animals slaughtered at 175 days of age (123.87 kg. The serum parameters evaluated were: total and ionic calcium, phosphorus, calcium/phosphorus ratio, total protein, albumin, AST, GGT, alkaline phosphatase, urea and creatinine. All biochemical parameters were analyzed using commercial kits in an automatic analyzer. The levels obtained for all analyzed parameters ranged within normal established values for this species and age. Inorganic phosphorus decrease in phytase-added diets did not interfere in bone metabolism. Vitamin and mineral supplements withdrawal and progressive decrease of inorganic phosphorus and phytase addition in diets of finishing pigs did not change hepatic or renal function. Micro minerals and vitamin restriction for 60 days during finishing phase in pigs did not lead to clinical changes.KEY WORDS: Bone metabolism, hepatic function, renal function. Physicochemical properties and mineral and protein content of honey samples from Ceará state, Northeastern Brazil Propriedades físico-químicas, minerais e teor de proteínas em amostras de méis do estado do Ceará, nordeste do Brasil

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    Maria da Conceição Tavares Cavalcanti Liberato

    2013-03-01

    Full Text Available This study evaluated the physicochemical properties and protein and mineral content of honey samples from Ceará State, Northeastern Brazil, one of the major honey exporters in the country. Nutritional importance of the minerals detected was also analyzed. Physicochemical properties were examined according to the AOAC and CAC official methods; the protein content was determined using the Bradford method, and the minerals were analyzed by atomic absorption spectrometry. All analyses were performed in triplicate. The levels of macrominerals sodium (Na, potassium (K, calcium (Ca, and magnesium (Mg varied from 1.80-47.20, 21.30-1513.30, 14.58-304.82, and 2.48-28.33 mg/kg, respectively, and the trace elements iron (Fe, copper (Cu, manganese (Mn, zinc (Zn, selenium (Se, and chromium (Cr varied from 0.12-8.76, 0.07-1.29, 0.06-1.96, 0.07-1.85 mg/kg, 0.36 × 10-3-62.00 × 10-3 and 22.50 × 10-3-170.33 × 10-3 µg/kg, respectively. Myracrodruon urundeuva honey sample had high contents of macrominerals (Na, K, Ca, and Mg. Protein content of the Anacardium occidentale honey sample was the highest (1121.00 µg/g among the samples analyzed. Among the minerals detected in the honey samples, K showed the highest concentration, followed by Ca, Na, and Mg. The presence of trace elements can show environmental contamination. The honey samples studied were free of trace elements contamination, except for Mn; the Piptadenia moniliformis was the only honey sample that was in compliance with the law requirements. The variations of the chemical constituents in the honey samples are probably related to differences in the floral origin and mineral and protein contents and confirm the nutritional importance of Ceará State honey.Este trabalho avaliou propriedades físico-químicas, teores de proteína e minerais em méis do Ceará, um dos principais exportadores do País. Também foi analisada a importância nutricional com relação aos minerais detectados. As

  9. The SMART-NAS Testbed

    Science.gov (United States)

    Aquilina, Rudolph A.

    2015-01-01

    The SMART-NAS Testbed for Safe Trajectory Based Operations Project will deliver an evaluation capability, critical to the ATM community, allowing full NextGen and beyond-NextGen concepts to be assessed and developed. To meet this objective a strong focus will be placed on concept integration and validation to enable a gate-to-gate trajectory-based system capability that satisfies a full vision for NextGen. The SMART-NAS for Safe TBO Project consists of six sub-projects. Three of the sub-projects are focused on exploring and developing technologies, concepts and models for evolving and transforming air traffic management operations in the ATM+2 time horizon, while the remaining three sub-projects are focused on developing the tools and capabilities needed for testing these advanced concepts. Function Allocation, Networked Air Traffic Management and Trajectory Based Operations are developing concepts and models. SMART-NAS Test-bed, System Assurance Technologies and Real-time Safety Modeling are developing the tools and capabilities to test these concepts. Simulation and modeling capabilities will include the ability to assess multiple operational scenarios of the national airspace system, accept data feeds, allowing shadowing of actual operations in either real-time, fast-time and/or hybrid modes of operations in distributed environments, and enable integrated examinations of concepts, algorithms, technologies, and NAS architectures. An important focus within this project is to enable the development of a real-time, system-wide safety assurance system. The basis of such a system is a continuum of information acquisition, analysis, and assessment that enables awareness and corrective action to detect and mitigate potential threats to continuous system-wide safety at all levels. This process, which currently can only be done post operations, will be driven towards "real-time" assessments in the 2035 time frame.

  10. nas

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    Modesto Varas

    Full Text Available Introduction and objective: pancreatic endocrine tumors (PET are difficult to diagnose. Their accurate localization using imaging techniques is intended to provide a definite cure. The goal of this retrospective study was to review a PET series from a private institution. Patients and methods: the medical records of 19 patients with PETs were reviewed, including 4 cases of MEN-1, for a period of 17 years (1994-2010. A database was set up with ten parameters: age, sex, symptoms, imaging techniques, size and location in the pancreas, metastasis, surgery, complications, adjuvant therapies, definite diagnosis, and survival or death. Results: a total of 19 cases were analyzed. Mean age at presentation was 51 years (range: 26-67 y (14 males, 5 females, and tumor size was 5 to 80 mm (X: 20 mm. Metastatic disease was present in 37% (7/19. Most underwent the following imaging techniques: ultrasounds, computed tomography (CT and magnetic resonance imaging (MRI. Fine needle aspiration punction (FNA was performed for the primary tumor in 4 cases. Non-functioning: 7 cases (37%, insulinoma: 2 cases [1 with possible multiple endocrine neoplasia (MEN], Zollinger-Ellison syndrome (ZES from gastrinoma: 5 (3 with MEN-1, glucagonoma: 2 cases, 2 somatostatinomas; carcinoid: 1 case with carcinoide-like syndrome. Most patients were operated upon: 14/19 (73%. Four (4/14: 28% has postoperative complications following pancreatectomy: pancreatitis, pseudocyst, and abdominal collections. Some patients received chemotherapy (4, somatostatin (3 and interferon (2 before or after surgery. Median follow-up was 48 months. Actuarial survival during the study was 73.6% (14/19. Conclusions: age was similar to that described in the literature. Males were predominant. Most cases were non-functioning (37%. Most patients underwent surgery (73% with little morbidity (28% and an actuarial survival of 73.6% at the time of the study.

  11. Influência da adição de uma carga nanoparticulada no desempenho de compósitos poliuretano/fibra de juta Influence of a nanoparticulate filler addition on the mechanical properties of polyurethane/jute fiber composites

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    José R. A. Neto

    2007-03-01

    Full Text Available Neste trabalho as propriedades mecânicas de um compósito, formado a partir de uma matriz de poliuretano derivado do óleo de mamona e reforçada por um tecido tramado de juta, foram avaliadas. O efeito da adição de pequenos teores de bentonita cálcica e sódica sobre as propriedades mecânicas da matriz de poliuretano e de compósitos poliuretano/juta também foi investigado. Os resultados indicam que a incorporação de fibra de juta à matriz poliuretana promoveu melhora significativa nas propriedades sob tração dos compósitos. A adição de pequenos teores de argila à matriz alterou o desempenho mecânico dos compósitos, porém os resultados não foram os esperados. O compósito híbrido poliuretano/argila/fibra de juta, contudo, apresentou propriedades mecânicas superiores às dos compósitos reforçados unicamente com tecido de juta, o que indica uma atuação sinérgica dos reforços híbridos argila/juta.In this work the mechanical properties of polyurethane/jute fiber composites were evaluated as a function of fiber content and mineral filler addition. A polyurethane (PU derived from castor oil was used as the matrix and hessian cloth as reinforcement. The effect of the incorporation of small amounts of local clay (bentonite, in its calcium and sodium forms, on the mechanical properties of polyurethane/jute composites was also investigated. The results indicate that the tensile properties of the composites substantially increased with jute fiber addition and that although the mechanical properties of the matrix were affected by the addition of nanoparticulate clay, the improvement was not as expected. This was attributed to poor mixing and dispersion of the filler, which was confirmed by SEM. A synergistic effect was observed for the hybrid clay/jute fiber composites, with considerable improvement in the mechanical performance of the hybrid composites.

  12. NAS Panel faults export controls

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    Katzoff, Judith A.

    A study prepared by a top-level panel says that current export controls on militarily sensitive U.S. technology may be “overcorrecting” previous weaknesses in that system, resulting in “a complex and confusing control system” that makes it more difficult for U.S. businesses to compete in international markets. Moreover, this control system has “an increasingly corrosive effect” on U.S. relations with allies. The panel recommended that the United States concentrate more effort on bringing about uniformity in the export control policies of countries belonging to the Coordinating Committee on Multilateral Export Controls (CoCom), i.e., most of the member nations in NATO (the North Atlantic Treaty Organization) and Japan.The 21-member panel was appointed by the Committee on Science, Engineering, and Public Policy (COSEPUP), a joint unit of the National Academy of Sciences (NAS), the National Academy of Engineering (NAE), and the Institute of Medicine (IOM). The panel, composed of administrators, researchers, and former government officials, was chaired by AGU member Lew Allen, Jr., director of the Jet Propulsion Laboratory (Pasadena, Calif.) and former chief of staff of the U.S. Air Force. Their report was supported by NAS funds, by a number of private organizations (including AGU), by the U.S. Departments of Commerce, Defense, Energy, and State, by the National Science Foundation, and by the National Aeronautics and Space Administration.

  13. The NAS Computational Aerosciences Archive

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    Miceli, Kristina D.; Globus, Al; Lasinski, T. A. (Technical Monitor)

    1995-01-01

    In order to further the state-of-the-art in computational aerosciences (CAS) technology, researchers must be able to gather and understand existing work in the field. One aspect of this information gathering is studying published work available in scientific journals and conference proceedings. However, current scientific publications are very limited in the type and amount of information that they can disseminate. Information is typically restricted to text, a few images, and a bibliography list. Additional information that might be useful to the researcher, such as additional visual results, referenced papers, and datasets, are not available. New forms of electronic publication, such as the World Wide Web (WWW), limit publication size only by available disk space and data transmission bandwidth, both of which are improving rapidly. The Numerical Aerodynamic Simulation (NAS) Systems Division at NASA Ames Research Center is in the process of creating an archive of CAS information on the WWW. This archive will be based on the large amount of information produced by researchers associated with the NAS facility. The archive will contain technical summaries and reports of research performed on NAS supercomputers, visual results (images, animations, visualization system scripts), datasets, and any other supporting meta-information. This information will be available via the WWW through the NAS homepage, located at http://www.nas.nasa.gov/, fully indexed for searching. The main components of the archive are technical summaries and reports, visual results, and datasets. Technical summaries are gathered every year by researchers who have been allotted resources on NAS supercomputers. These summaries, together with supporting visual results and references, are browsable by interested researchers. Referenced papers made available by researchers can be accessed through hypertext links. Technical reports are in-depth accounts of tools and applications research projects

  14. UAS-NAS Stakeholder Feedback Report

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    Randall, Debra; Murphy, Jim; Grindle, Laurie

    2016-01-01

    The need to fly UAS in the NAS to perform missions of vital importance to national security and defense, emergency management, science, and to enable commercial applications has been continually increasing over the past few years. To address this need, the NASA Aeronautics Research Mission Directorate (ARMD) Integrated Aviation Systems Program (IASP) formulated and funded the Unmanned Aircraft Systems (UAS) Integration in the National Airspace System (NAS) Project (hereafter referred to as UAS-NAS Project) from 2011 to 2016. The UAS-NAS Project identified the following need statement: The UAS community needs routine access to the global airspace for all classes of UAS. The Project identified the following goal: To provide research findings to reduce technical barriers associated with integrating UAS into the NAS utilizing integrated system level tests in a relevant environment. This report provides a summary of the collaborations between the UAS-NAS Project and its primary stakeholders and how the Project applied and incorporated the feedback.

  15. Future NAS Flight Demand Generation Tool Project

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    National Aeronautics and Space Administration — Aviation and Air Traffic Management researchers are increasingly utilizing complex regional or NAS-wide simulations to evaluate future concepts. These analyses...

  16. Greenhouse policy study from NAS

    Science.gov (United States)

    Maggs, William Ward

    The National Academy of Sciences will produce a study for the Environmental Protection Agency on policy responses to global warming. The report is due out before the end of 1990.Dan J. Evans, former U.S. Senator and former Governor of Washington, will chair a panel of the Commission on Science, Engineering, and Public Policy, a body of the councils of the NAS, National Academy of Engineering, and Institute of Medicine. Evans is a registered civil engineer and previously chaired the Pacific Northwest Electric Power and Conservation Planning Council.The 13-person panel includes AGU members Stephen Schneider of the National Center for Atmospheric Research and Robert Frosch, Vice President of Research Laboratores at General Motors Corp., Jessica Mathews, Vice President of the World Resources Institute, and Sir Crispin Tickell, the United Kingdom's Ambassador to the United Nations.

  17. Mineral oils

    Science.gov (United States)

    Furby, N. W.

    1973-01-01

    The characteristics of lubricants made from mineral oils are discussed. Types and compositions of base stocks are reviewed and the product demands and compositions of typical products are outlined. Processes for commercial production of mineral oils are examined. Tables of data are included to show examples of product types and requirements. A chemical analysis of three types of mineral oils is reported.

  18. GaInNAs laser gain

    Energy Technology Data Exchange (ETDEWEB)

    CHOW,WENG W.; JONES,ERIC D.; MODINE,NORMAND A.; KURTZ,STEVEN R.; ALLERMAN,ANDREW A.

    2000-05-23

    The optical gain spectra for GaInNAs/GaAs quantum wells are computed using a microscopic laser theory. From these spectra, the peak gain and carrier radiative decay rate as functions of carrier density are determined. These dependences allow the study of the lasing threshold current density of GaInNAs/GaAs quantum well structures.

  19. Metabolismo do cobre nas epilepsias

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    Luís Marques de Assis

    1966-12-01

    Full Text Available Partindo do fato de que o metabolismo do cobre está alterado nas epilepsias, o autor estudou sob que forma essa alteração se manifesta e, mediante o uso de curare em pacientes mentais submetidos ao eletrochoque, a influência da hiperatividade muscular própria da crise convulsiva sobre o metabolismo do cobre. Além disso, o autor estudou as correlações entre sexo e idade dos pacientes epilépticos, de um lado, e cupremia e cuprorraquia, do outro, e fez a correlação entre os níveis de cobre do soro e do LCR desses pacientes. Nos pacientes epilépticos (84 foram colhidas amostras de sangue (81 casos e de LCR (66 casos em período intercrítico para dosagem do cobre total. Nos pacientes mentais (32 foram colhidas amostras de sangue antes e imediatamente após crise convulsiva determinada pelo eletrochoque simples (22 casos para dosagem de ceruloplasmina, e imediatamente após eletrochoque sob ação de curare (10 casos para dosagem do cobre total. Os resultados foram submetidos a análise estatística, tendo o autor chegado às seguintes conclusões: 1 o nível de cobre do sangue e do LCR dos pacientes epilépticos não depende do sexo nem da idade; 2 o teor de cobre do LCR está correlacionado com o do sangue nos pacientes epilépticos; 3 a supressão, mediante o uso de substância curarizante, das manifestações musculares da crise produzida pelo eletrochoque acarreta queda não significativa do nível de cobre do sangue; 4 a queda do nível de cobre do sangue após convulsões determinadas pelo eletrochoque depende da hiperatividade muscular que caracteriza a crise convulsiva; 5 a queda do nível de cobre do sangue após convulsões determinadas pelo eletrochoque depende principalmente do cobre de reação direta; 6 a queda dos níveis de cobre do sangue após convulsões determinadas pelo eletrochoque é devida à pas* sagem desse elemento para os espaços intracelulares.

  1. Simultaneous Estimation of Hydrochlorothiazide, Hydralazine Hydrochloride, and Reserpine Using PCA, NAS, and NAS-PCA.

    Science.gov (United States)

    Sharma, Chetan; Badyal, Pragya Nand; Rawal, Ravindra K

    2015-01-01

    In this study, new and feasible UV-visible spectrophotometric and multivariate spectrophotometric methods were described for the simultaneous determination of hydrochlorothiazide (HCTZ), hydralazine hydrochloride (H.HCl), and reserpine (RES) in combined pharmaceutical tablets. Methanol was used as a solvent for analysis and the whole UV region was scanned from 200-400 nm. The resolution was obtained by using multivariate methods such as the net analyte signal method (NAS), principal component analysis (PCA), and net analyte signal-principal component analysis (NAS-PCA) applied to the UV spectra of the mixture. The results obtained from all of the three methods were compared. NAS-PCA showed a lot of resolved data as compared to NAS and PCA. Thus, the NAS-PCA technique is a combination of NAS and PCA methods which is advantageous to obtain the information from overlapping results.

  2. Antimycobacterial Activity and Mechanism of Action of NAS-91.

    Science.gov (United States)

    Gratraud, Paul; Surolia, Namita; Besra, Gurdyal S; Surolia, Avadhesha; Kremer, Laurent

    2008-03-01

    The antimalarial agents NAS-91 and NAS-21 were found to express potent antimycobacterial activity, NAS-91 being more active than NAS-21. They partially inhibited mycolic acid biosynthesis and profoundly altered oleic acid production. The development of a cell-free assay for Delta 9-desaturase activity allowed direct demonstration of the inhibition of oleic acid biosynthesis by these compounds.

  3. NASSN: a NAS-based storage network

    Institute of Scientific and Technical Information of China (English)

    HAN De-zhi

    2007-01-01

    With the digital information and application requirement on the Internet increasing fleetly nowadays,it is urgent to work out a network storage system with a large capacity, a high availability and scalability. To solve the above-mentioned issues, a NAS-based storage network ( for short NASSN) has been designed. Firstly,the NASSN integrates multi-NAS,iNAS (an iSCSI-based NAS) and enterprise SAN with the help of storage virtualization, which can provide a greater capacity and better scalability. Secondly, the NASSN can provide high availability with the help of server and storage subsystem redundancy technologies. Thirdly, the NASSN simultaneously serves for both the file I/O and the block L/O with the help of an iSCSI module, which has the advantages of NAS and SAN. Finally, the NASSN can provide higher I/O speed by a high network-attached channel which implements the direct data transfer between the storage device and client. In the experiments, the NASSN has ultra-high-throughput for both of the file I/O requests and the block I/O requests.

  4. Aggregate and Mineral Resources - Minerals

    Data.gov (United States)

    NSGIC State | GIS Inventory — This point occurrence data set represents the current mineral and selected energy resources of Utah. The data set coordinates were derived from USGS topographic maps...

  5. Fumarolic minerals

    DEFF Research Database (Denmark)

    Balic Zunic, Tonci; Garavelli, Anna; Jakobsson, Sveinn Peter

    2016-01-01

    The fumarolic mineralogy of the Icelandic active volcanoes, the Tyrrhenian volcanic belt (Italy) and the Aegean active arc (Greece) is investigated, and literature data surveyed in order to define the characteristics of the European fumarolic systems. They show broad diversity of mineral...... associations, with Vesuvius and Vulcano being also among the world localities richest in mineral species. Volcanic systems, which show recession over a longer period, show fumarolic development from the hightemperature alkaline halide/sulphate, calcic sulphate or sulphidic parageneses, synchronous...... fluctuations in activity, illustrated by the example of Vulcano where the high-temperature association appears intermittently. A full survey of the mineral groups and species is given in respect to their importance and appearance in fumarolic associations....

  6. Comparative study of defect levels in GaInNAs, GaNAsSb, and GaInNAsSb for high-efficiency solar cells

    Science.gov (United States)

    Polojärvi, Ville; Aho, Arto; Tukiainen, Antti; Schramm, Andreas; Guina, Mircea

    2016-03-01

    Background doping and defect levels in GaInNAs, GaNAsSb, and GaInNAsSb solar cells with 1 eV band-gap are reported. Localized point defect induced traps were observed showing broadest defect distribution in GaInNAsSb. Incorporation of Sb reduced the unintentional p-type background doping by an order of magnitude, but increased the capture cross sections of deep levels by three orders of magnitude. The thermal activation energy of the dominating hole trap was increased from 350 meV for GaInNAs to 560 meV for GaNAsSb. Annealing of GaNAsSb solar cells improved the open circuit voltage from 280 mV to 415 mV, owing to the reduction in trap density.

  7. NAS-50 and NAS-40: New scales for the assessment of self-control

    Directory of Open Access Journals (Sweden)

    Nęcka Edward

    2016-09-01

    Full Text Available In this paper, we present a new questionnaire for the assessment of self-control as an individual trait. We describe the process of construction of this assessment tool. We also report the results of relevant validation studies. The questionnaire has two independent versions, one based on self-reports (NAS-50 and another one based on other-reports (NAS-40. The first version consists of five subscales (10 items each, called Initiative and Persistence (IP, Proactive Control (PC, Switching and Flexibility (SF, Inhibition and Adjournment (IA, and Goal Maintenance (GM. Seven samples of participants (N = 934 altogether took part in the validation study. The second version has not been split into subscales. Both versions obtained satisfactory indices of internal consistency, assessed with Cronbach’s alpha (for NAS- 50 total score a = .861, for the subscales a between .726 and .867; for NAS-40 a = .844. The NAS-50 and NAS-40 scores were highly correlated with other measures of self-control, including Tangney, Baumeister, and Boone’s (2004 self-control scale. They also proved to be entirely independent of general intelligence. In conclusion, both versions can be regarded reliable and valid enough, and therefore suitable for the assessment of trait self-control for research purposes.

  8. Distributed Command/Control Impacts on NAS Operations Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Command and Control (C2) activities abound in the NAS, and significantly influence daily operations and overall NAS efficiency. Since C2 effects are so prominent,...

  9. Notas sobre o fantasma nas toxicomanias

    Directory of Open Access Journals (Sweden)

    Walter Firmo de Oliveira Cruz

    Full Text Available O presente artigo foi apresentado na Jornada Clínica da Associação Psicanalítica de Porto Alegre - "A direção da cura nas toxicomanias: o sujeito em questão em outubro de 2003. Através da discussão de um caso clínico, busca evidenciar a importância da relação existente entre a fantasmática do sujeito e a escolha do objeto nas toxicomanias. Aborda ainda a toxicomania como sintoma da contemporaneidade, bem como traços da estética que a compõe.

  10. Mineral bioprocessing

    Energy Technology Data Exchange (ETDEWEB)

    Torma, A.E.

    1993-05-01

    In the last 25 years, the introduction of biotechnological methods in hydrometallurgy has created new opportunities and challenges for the mineral processing industry. This was especially true for the production of metal values from mining wastes and low-and-complex-grade mineral resources, which were considered economically not amenable for processing by conventional extraction methods. Using bio-assisted heap, dump and in-situ leaching technologies, copper and uranium extractions gained their first industrial applications. The precious metal industries were the next to adopt the bio-preoxidation technique in the extraction of gold from refractory sulfide-bearing ores and concentrates. A variety of other bioleaching opportunities exist for nickel, cobalt, cadmium and zinc sulfide leaching. Recently developed bioremediation methods and biosorption technologies have shown a good potential for industrial applications to remove trace heavy metal and radionuclide concentrations from contaminated soils, and mining and processing effluents.

  11. Implementation of NAS Parallel Benchmarks in Java

    Science.gov (United States)

    Frumkin, Michael; Schultz, Matthew; Jin, Hao-Qiang; Yan, Jerry

    2000-01-01

    A number of features make Java an attractive but a debatable choice for High Performance Computing (HPC). In order to gauge the applicability of Java to the Computational Fluid Dynamics (CFD) we have implemented NAS Parallel Benchmarks in Java. The performance and scalability of the benchmarks point out the areas where improvement in Java compiler technology and in Java thread implementation would move Java closer to Fortran in the competition for CFD applications.

  12. Hydrothermal minerals

    Digital Repository Service at National Institute of Oceanography (India)

    Nath, B.N.

    -floor hydrothermal processes involving free circulation of seawater through ocean crust as convection. Heat flow, seafloor fracturing, permeability and fluid composition are the parameters governing the type and extent of mineralization. The chimney like... stream_size 23365 stream_content_type text/plain stream_name Refresher_Course_Mar_Geol_Geophys_2007_Lecture_Notes_78.pdf.txt stream_source_info Refresher_Course_Mar_Geol_Geophys_2007_Lecture_Notes_78.pdf.txt Content-Encoding UTF-8...

  13. Lipoproteínas: metabolismo y lipoproteínas aterogénicas

    OpenAIRE

    Carlos Carvajal

    2014-01-01

    Los lípidos viajan en sangre en diferentes partículas conteniendo lípidos y proteínas llamadas lipoproteínas. Hay cuatro clases de lipoproteínas en sangre: quilomicrones, VLDL, LDL y HDL. Los quilomicrones transportan triglicéridos (TAG) a tejidos vitales (corazón, musculo esquelético y tejido adiposo). El hígado secreta VLDL que redistribuye TAG al tejido adiposo, corazón y músculo esquelético. LDL transporta colesterol hacia las células y HDL remueve colesterol de las células de vuelta al h...

  14. Lipoproteínas: metabolismo y lipoproteínas aterogénicas

    OpenAIRE

    Carlos Carvajal

    2014-01-01

    Los lípidos viajan en sangre en diferentes partículas conteniendo lípidos y proteínas llamadas lipoproteínas. Hay cuatro clases de lipoproteínas en sangre: quilomicrones, VLDL, LDL y HDL. Los quilomicrones transportan triglicéridos (TAG) a tejidos vitales (corazón, musculo esquelético y tejido adiposo). El hígado secreta VLDL que redistribuye TAG al tejido adiposo, corazón y músculo esquelético. LDL transporta colesterol hacia las células y HDL remueve colesterol de las células de vuelta al h...

  15. Lipoproteínas: metabolismo y lipoproteínas aterogénicas

    Directory of Open Access Journals (Sweden)

    Carlos Carvajal

    2014-12-01

    Full Text Available Los lípidos viajan en sangre en diferentes partículas conteniendo lípidos y proteínas llamadas lipoproteínas. Hay cuatro clases de lipoproteínas en sangre: quilomicrones, VLDL, LDL y HDL. Los quilomicrones transportan triglicéridos (TAG a tejidos vitales (corazón, musculo esquelético y tejido adiposo. El hígado secreta VLDL que redistribuye TAG al tejido adiposo, corazón y músculo esquelético. LDL transporta colesterol hacia las células y HDL remueve colesterol de las células de vuelta al hígado. Las lipoproteínas ricas en TAG y sus remanentes son aterogénicas y están asociadas con otros factores lipídicos de riesgo (partículas de LDL pequeñas y densas y bajo HDL. LDL y Lp(a son partículas aterogénicas. HDL es una lipoproteína anti-aterogénica.

  16. Minerals Yearbook, volume I, Metals and Minerals

    Science.gov (United States)

    ,

    2017-01-01

    The U.S. Geological Survey (USGS) Minerals Yearbook discusses the performance of the worldwide minerals and materials industries and provides background information to assist in interpreting that performance. Content of the individual Minerals Yearbook volumes follows:Volume I, Metals and Minerals, contains chapters about virtually all metallic and industrial mineral commodities important to the U.S. economy. Chapters on survey methods, summary statistics for domestic nonfuel minerals, and trends in mining and quarrying in the metals and industrial mineral industries in the United States are also included.Volume II, Area Reports: Domestic, contains a chapter on the mineral industry of each of the 50 States and Puerto Rico and the Administered Islands. This volume also has chapters on survey methods and summary statistics of domestic nonfuel minerals.Volume III, Area Reports: International, is published as four separate reports. These regional reports contain the latest available minerals data on more than 180 foreign countries and discuss the importance of minerals to the economies of these nations and the United States. Each report begins with an overview of the region’s mineral industries during the year. It continues with individual country chapters that examine the mining, refining, processing, and use of minerals in each country of the region and how each country’s mineral industry relates to U.S. industry. Most chapters include production tables and industry structure tables, information about Government policies and programs that affect the country’s mineral industry, and an outlook section.The USGS continually strives to improve the value of its publications to users. Constructive comments and suggestions by readers of the Minerals Yearbook are welcomed.

  17. Miscellaneous Industrial Mineral Operations

    Data.gov (United States)

    Department of Homeland Security — This map layer includes miscellaneous industrial minerals operations in the United States. The data represent commodities covered by the Minerals Information Team...

  18. [The NAS system: Nursing Activities Score in mobile technology].

    Science.gov (United States)

    Catalan, Vanessa Menezes; Silveira, Denise Tolfo; Neutzling, Agnes Ludwig; Martinato, Luísa Helena Machado; Borges, Gilberto Cabral de Mello

    2011-12-01

    The objective of this study was to present the computerized structure that enables the use of the Nursing Activities Score (NAS) in mobile technology. It is a project for the development of technology production based on software engineering, founded on the theory of systems development life cycle. The NAS system was built in two modules: the search module, which is accessed using a personal computer (PC), and Data Collection module, which is accessed through a mobile device (Smartphone). The NAS system was constructed to allow other forms, in addition to the NAS tool, to be included in the future. Thus, it is understood that the development of the NAS will bring nurses closer to mobile technology and facilitate their accessibility to the data of the instrument relating to patients, thus assisting in decision-making and in staffing to provide nursing care.

  19. Determinants of pathologic mineralization.

    Science.gov (United States)

    Kirsch, Thorsten

    2008-01-01

    Physiologic mineralization is necessary for the formation of skeletal tissues and for their appropriate functions during adulthood. Mineralization has to be controlled and restricted to specific regions. If the mineralization process occurs in regions that normally do not mineralize, there can be severe consequences (pathologic or ectopic mineralization). Recent findings have indicated that physiologic and pathologic mineralization events are initiated by matrix vesicles, membrane-enclosed particles released from the plasma membranes of mineralization-competent cells. The understanding of how these vesicles are released from the plasma membrane and initiate the mineralization process may provide novel therapeutic strategies to prevent pathologic mineralization. In addition, other regulators (activators and inhibitors) of physiologic mineralization have been identified and characterized, and there is evidence that the same factors also contribute to the regulation of pathologic mineralization. Finally, programmed cell death (apoptosis) may be a contributor to physiologic mineralization and if occurring after tissue injury may induce pathologic mineralization and mineralization-related differentiation events in the injured and surrounding areas. This review describes how the understanding of mechanisms and factors regulating physiologic mineralization can be used to develop new therapeutic strategies to prevent pathologic or ectopic mineralization events.

  20. Modulacion de la mesoestructura y composicion en silices nanoparticuladas con porosidad jerarquica

    Science.gov (United States)

    Morales Tatay, Jose Manuel

    The objectives of this thesis were: 1) Ensure the development of a reproducible method of synthesis of nanoparticulate bimodal silicas (NBS), UVM-7 type, to enable fine and independent control of both pore systems, intra- and interparticle. Is intended to confirm that by controlling the physicochemical procedural variables as the concentration of surfactant and the dielectric constant of the reaction medium, along with a strategy of well defined and easy synthesis, can lead to the obtainment of a NBS material showing characteristics topological significantly different. 2) The synthesis of new bimodal mesoporous nanocrystalline materials, UVM-7 type, using a cheap source of silicon and simplifying the maximum synthesis. Starting from a cheap inorganic precursor such as sodium silicate, seeks a path of simple, reproducible, fast and with the least possible number of synthesis reaction steps with a view to future production at industrial level of the mesoporous silica nanoparticulate. 3) A detailed characterization of the new material called UVM-10. Check the similarities and differences of this nanoparticulate mesoporous silica obtained from a cheap source of silicon with respect to the reference materials (UVM-7 and MCM-41). The study of UVM-10 was carried out by all mesoporous solids characterization techniques available in the ICMUV. 4) Within a characterization and adequacy of the UVM-10 for future application as catalyst support, have studied possible routes of synthesis and subsequent optimization that will produce the UVM-10 silica doped with various hetero (Al and Ti). 5) Chemical knowledge transfer has acquired the ability to obtain a nanoparticulate hierarchical bimodal porosity from a silicon source but condensed by a synthesis route elapses in homogeneous phase material. This material renamed UVM-12 type silica. 6) Finally, it has been suggested a comparative thermal stability between the various silicas (UVM-7, UVM-UVM-10 and 12). In general, the main mood of the work has been divided into two parts; in the case of the UVM-7, the maximum understanding of the processes involved in the synthesis (especially hydrolysis, condensation and reconstitution of silica) and study how efficient procedural regulation of two basic physicochemical variables: the concentration of surfactant and dielectric constant of the reaction medium. In a second part, the development of new materials following the premises of reducing the synthesis, simplify the process and eliminate environmentally harmful reagents. We can conclude that: The one-UVM-7 UVM-10 silicas and combine all the advantages associated with mesopores short in length, interconnected with a hierarchical porosity and larger scale. 2-for the first time has been modulated size pore two systems independently with a single surfactant by one-pot synthesis type. 3-were first prepared NBS type silicas from sodium silicate with appreciable yield and textural properties similar to those presented by the UVM-7 silica to which we have called UVM-10 type. Also has been modulated intra- and interparticle porosity also using a single template agent. It has combined this new low-cost via preparative with the inclusion of substantial amounts of aluminum and titanium as hetero without altering the NBS organization. 4-Modifying the order of addition of reagents with respect to the employee in the synthesis of the UVM-10 silicas, we managed synthesized by a one-pot strategy a new family, silicas UVM-12, which combines advantages of its two predecessors (UVM UVM-10 -7). Was also optimized the incorporation of heteroatoms (Al and Ti) which modify the nature of the mesopore wall, keeping the NBS type organization. 5-Ne has prepared a new family of NBS silicas, UVM-13, using a template to generate single agent hierarchical pore two systems, used a source of solid fumed silica as silica. We modulated six-wall size NBS type silicas from about 1.9 nm (UVM-7) to 2.9 (UVM-13) through 2.5 (UVM-10). The importance of this parameter is that a greater thickness have higher thermal stability and this point could alleviate to some extent the deficiency of mesoporous silicas on zeolites. Understanding the reactions involved in the various processes of synthesis is allowing direct our preparative chemistry for materials with specific characteristics, chemical and structurally homogeneous and reproducibly. These features become necessary and indispensable requirements if we consider the possibility of using these silicas NBS as a platform or support more complex structures (theranostics materials, catalysts, composites, etc.), or if we want to scale their synthesis thinking about possible transfers system productive sectors. The new UVM-10 and UVM-12 supports could improve performance, especially in those cases where required (for the conditions) thermal or hydrothermal stability superior. (Abstract shortened by UMI.).

  1. UAS Integration in the NAS FY15 Annual Review

    Science.gov (United States)

    Grindle, Laurie; Randall, Debra; Hackenburg, Davis

    2015-01-01

    This presentation gives insight into the research activities and efforts being executed in order to integrate unmanned aircraft systems into the national airspace system. This briefing is to inform others of the UAS-NAS progress and future directions.

  2. Natural attenuation software (NAS): Assessing remedial strategies and estimating timeframes

    Science.gov (United States)

    Mendez, E.; Widdowson, M.; Chapelle, F.; Casey, C.

    2005-01-01

    Natural Attenuation Software (NAS) is a screening tool to estimate remediation timeframes for monitored natural attenuation (MNA) and to assist in decision-making on the level of source zone treatment in conjunction with MNA using site-specific remediation objectives. Natural attenuation processes that NAS models include are advection, dispersion, sorption, non-aqueous phase liquid (NAPL) dissolution, and biodegradation of either petroleum hydrocarbons or chlorinated ethylenes. Newly-implemented enhancements to NAS designed to maximize the utility of NAS for site managers were observed. NAS has expanded source contaminant specification options to include chlorinated ethanes and chlorinated methanes, and to allow for the analysis of any other user-defined contaminants that may be subject to microbially-mediated transformations (heavy metals, radioisotopes, etc.). Included is the capability to model co-mingled plumes, with constituents from multiple contaminant categories. To enable comparison of remediation timeframe estimates between MNA and specific engineered remedial actions , NAS was modified to incorporate an estimation technique for timeframes associated with pump-and-treat remediation technology for comparison to MNA. This is an abstract of a paper presented at the 8th International In Situ and On-Site Bioremediation Symposium (Baltimore, MD 6/6-9/2005).

  3. Mineral resources of Australia

    Energy Technology Data Exchange (ETDEWEB)

    Kelsall, D.F.; Woodcock, J.T. (eds.)

    1979-01-01

    The papers presented cover geological, geochemical technology and geophysics in mineral exploration, mineral resources, mining methods and technology, aspects of beneficiation, pyrometallurgy and hydrometallurgy, and environmental aspects. 4 of the 14 papers have been abstracted separately.

  4. Construction Minerals Operations

    Data.gov (United States)

    Department of Homeland Security — This map layer includes construction minerals operations in the United States. The data represent commodities covered by the Minerals Information Team (MIT) of the...

  5. Agricultural Minerals Operations

    Data.gov (United States)

    Department of Homeland Security — This map layer includes agricultural minerals operations in the United States. The data represent commodities covered by the Minerals Information Team (MIT) of the...

  6. Mineral Resources Data System

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Mineral resource occurrence data covering the world, most thoroughly within the U.S. This database contains the records previously provided in the Mineral Resource...

  7. Mineral Supply Challenges

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    Faced with shortcomings in its mineral supply, it’s imperative for China to balance its desire for reserves with its current economic needs Mineral resources are the corner- stone of materials needed for China’s national economic and social development.The country even counts on its mineral resources to satisfy 90 percent of its energy demands and over 95

  8. Chelated minerals for poultry

    Directory of Open Access Journals (Sweden)

    SL Vieira

    2008-06-01

    Full Text Available Organic minerals have been subject of an increasing number of investigations recently. These compounds can be considered the most significant event regarding commercial forms of minerals targeting animal supplementation in the last decades. Minerals, especially metals, are usually supplemented in poultry feeds using cheap saline sources and have never required a lot of attention in terms of quality. On the other hand, definitions of organic minerals are very broad and frequently lead to confusion when decision-making becomes necessary. Organic minerals include any mineral bound to organic compounds, regardless of the type of existing bond between mineral and organic molecules. Proteins and carbohydrates are the most frequent candidates in organic mineral combinations. Organic fraction size and bond type are not limitations in organic mineral definition; however, essential metals (Cu, Fe, Zn, and Mn can form coordinated bonds, which are stable in intestinal lumen. Metals bound to organic ligands by coordinated bonds can dissociate within animal metabolism whereas real covalent bonds cannot. Chelated minerals are molecules that have a metal bound to an organic ligand through coordinated bonds; but many organic minerals are not chelates or are not even bound through coordinated bonds. Utilization of organic minerals is largely dependent on the ligand; therefore, amino acids and other small molecules with facilitated access to the enterocyte are supposed to be better utilized by animals. Organic minerals with ligands presenting long chains may require digestion prior to absorption. After absorption, organic minerals may present physiological effects, which improve specific metabolic responses, such as the immune response. Many studies have demonstrated the benefits of metal-amino acid chelates on animal metabolism, but the detection positive effects on live performance is less consistent.

  9. National Air Space (NAS) Data Exchange Environment Through 2060

    Science.gov (United States)

    Roy, Aloke

    2015-01-01

    NASA's NextGen Concepts and Technology Development (CTD) Project focuses on capabilities to improve safety, capacity and efficiency of the National Air Space (NAS). In order to achieve those objectives, NASA sought industry-Government partnerships to research and identify solutions for traffic flow management, dynamic airspace configuration, separation assurance, super density operations, airport surface operations and similar forward-looking air-traffic modernization (ATM) concepts. Data exchanges over NAS being the key enabler for most of these ATM concepts, the Sub-Topic area 3 of the CTD project sought to identify technology candidates that can satisfy air-to-air and air/ground communications needs of the NAS in the year 2060 timeframe. Honeywell, under a two-year contract with NASA, is working on this communications technology research initiative. This report summarizes Honeywell's research conducted during the second year of the study task.

  10. UAS-NAS Flight Test Series 3: Test Environment Report

    Science.gov (United States)

    Hoang, Ty; Murphy, Jim; Otto, Neil

    2016-01-01

    The desire and ability to fly Unmanned Aircraft Systems (UAS) in the National Airspace System (NAS) is of increasing urgency. The application of unmanned aircraft to perform national security, defense, scientific, and emergency management are driving the critical need for less restrictive access by UAS to the NAS. UAS represent a new capability that will provide a variety of services in the government (public) and commercial (civil) aviation sectors. The growth of this potential industry has not yet been realized due to the lack of a common understanding of what is required to safely operate UAS in the NAS. NASA's UAS Integration in the NAS Project is conducting research in the areas of Separation Assurance/Sense and Avoid Interoperability (SSI), Human Systems Integration (HSI), and Communications (Comm), and Certification to support reducing the barriers of UAS access to the NAS. This research is broken into two research themes namely, UAS Integration and Test Infrastructure. UAS Integration focuses on airspace integration procedures and performance standards to enable UAS integration in the air transportation system, covering Detect and Avoid (DAA) performance standards, command and control performance standards, and human systems integration. The focus of Test Infrastructure is to enable development and validation of airspace integration procedures and performance standards, including integrated test and evaluation. In support of the integrated test and evaluation efforts, the Project will develop an adaptable, scalable, and schedulable relevant test environment capable of evaluating concepts and technologies for unmanned aircraft systems to safely operate in the NAS. To accomplish this task, the Project is conducting a series of human-in-the-loop (HITL) and flight test activities that integrate key concepts, technologies and/or procedures in a relevant air traffic environment. Each of the integrated events will build on the technical achievements, fidelity, and

  11. 43 CFR 19.8 - Prospecting, mineral locations, mineral patents, and mineral leasing within National Forest...

    Science.gov (United States)

    2010-10-01

    ... patents, and mineral leasing within National Forest Wilderness. 19.8 Section 19.8 Public Lands: Interior... § 19.8 Prospecting, mineral locations, mineral patents, and mineral leasing within National Forest... locations, mineral patents, and mineral leasing within National Forest Wilderness are contained in parts...

  12. Emprego dos gangliosidos do cortex cerebral nas neuropatias perifericas

    Directory of Open Access Journals (Sweden)

    James Pitagoras De Mattos

    1981-12-01

    Full Text Available Os autores registram a experiência pessoal com o emprego de gangliosídios do cortex cerebral nas neuropatias periféricas. O ensaio clínico e eletromiográfico revelou-se eficaz em 30 dos 40 casos tratados. Enfatizam os melhores resultados em casos de paralisias faciais periféricas.

  13. Mineral Fiber Toxicology

    Science.gov (United States)

    The chemical and physical properties of different forms of mineral fibers impact biopersistence and pathology in the lung. Fiber chemistry, length, aspect ratio, surface area and dose are critical factors determining mineral fiber-associated health effects including cancer and as...

  14. Mineral commodity summaries 2017

    Science.gov (United States)

    Ober, Joyce A.

    2017-01-31

    This report is the earliest Government publication to furnish estimates covering 2016 nonfuel mineral industry data. Data sheets contain information on the domestic industry structure, Government programs, tariffs, and 5-year salient statistics for more than 90 individual minerals and materials.

  15. Marine Mineral Exploration

    DEFF Research Database (Denmark)

    The past 20 years have seen extensive marine exploration work by the major industrialized countries. Studies have, in part, been concentrated on Pacific manganese nodule occurrences and on massive sulfides on mid-oceanic ridges. An international jurisdictional framework of the sea-bed mineral...... in EEZ areas are fairly unknown; many areas need detailed mapping and mineral exploration, and the majority of coastal or island states with large EEZ areas have little experience in exploration for marine hard minerals. This book describes the systematic steps in marine mineral exploration....... Such exploration requires knowledge of mineral deposits and models of their formation, of geophysical and geochemical exploration methods, and of data evaluation and interpretation methods. These topics are described in detail by an international group of authors. A short description is also given of marine...

  16. Mineral Commodity Summaries 2008

    Science.gov (United States)

    ,

    2008-01-01

    Each chapter of the 2008 edition of the U.S. Geological Survey (USGS) Mineral Commodity Summaries (MCS) includes information on events, trends, and issues for each mineral commodity as well as discussions and tabular presentations on domestic industry structure, Government programs, tariffs, 5-year salient statistics, and world production and resources. The MCS is the earliest comprehensive source of 2007 mineral production data for the world. More than 90 individual minerals and materials are covered by two-page synopses. National reserves and reserve base information for most mineral commodities found in this report, including those for the United States, are derived from a variety of sources. The ideal source of such information would be comprehensive evaluations that apply the same criteria to deposits in different geographic areas and report the results by country. In the absence of such evaluations, national reserves and reserve base estimates compiled by countries for selected mineral commodities are a primary source of national reserves and reserve base information. Lacking national assessment information by governments, sources such as academic articles, company reports, common business practice, presentations by company representatives, and trade journal articles, or a combination of these, serve as the basis for national reserves and reserve base information reported in the mineral commodity sections of this publication. A national estimate may be assembled from the following: historically reported reserves and reserve base information carried for years without alteration because no new information is available; historically reported reserves and reserve base reduced by the amount of historical production; and company reported reserves. International minerals availability studies conducted by the U.S. Bureau of Mines, before 1996, and estimates of identified resources by an international collaborative effort (the International Strategic Minerals

  17. Why Mineral Interfaces Matter

    Science.gov (United States)

    Putnis, Andrew; Putnis, Christine V.

    2015-04-01

    While it is obvious that reactions between a mineral and an aqueous solution take place at the mineral-fluid interface it is only relatively recently that high spatial resolution studies have demonstrated how the local structure of the mineral surface and the chemical composition of the fluid at the interface control both the short-range and the long-range consequences of mineral-fluid interaction. Long-range consequences of fluid-mineral interaction control element cycles in the earth, the formation of ore-deposits, the chemical composition of the oceans through weathering of rocks and hence climate changes. Although weathering is clearly related to mineral dissolution, to what extent do experimentally measured dissolution rates of minerals help to understand weathering, especially weathering mechanisms? This question is related to the short-range, local reactions that take place when a mineral, that is not stable in the fluid, begins to dissolve. In this case the fluid composition at the interface will become supersaturated with respect to a different phase or phases. This may be a different composition of the same mineral e.g. a Ca-rich feldspar dissolving in a Na-rich solution results in a fluid at the interface which may be supersaturated with respect to an Na-rich feldspar. Alternatively, the interfacial fluid could be supersaturated with respect to a different mineral e.g. an Na-rich zeolite, depending on the temperature. Numerous experiments have shown that the precipitation of a more stable phase at the mineral-fluid interface results in a coupling between the dissolution and the precipitation, and the replacement of one mineral by another. This process separates the short-range mechanisms which depend only on the composition of the interfacial solution, and the long-range consequences that depend on the composition of the residual fluid released from the reacting parent mineral. Typically such residual fluids may carry metal ions tens to hundreds of

  18. Mineral facilities of Europe

    Science.gov (United States)

    Almanzar, Francisco; Baker, Michael S.; Elias, Nurudeen; Guzman, Eric

    2010-01-01

    This map displays over 1,700 records of mineral facilities within the countries of Europe and western Eurasia. Each record represents one commodity and one facility type at a single geographic location. Facility types include mines, oil and gas fields, and plants, such as refineries, smelters, and mills. Common commodities of interest include aluminum, cement, coal, copper, gold, iron and steel, lead, nickel, petroleum, salt, silver, and zinc. Records include attributes, such as commodity, country, location, company name, facility type and capacity (if applicable), and latitude and longitude geographical coordinates (in both degrees-minutes-seconds and decimal degrees). The data shown on this map and in table 1 were compiled from multiple sources, including (1) the most recently available data from the U.S. Geological Survey (USGS) Minerals Yearbook (Europe and Central Eurasia volume), (2) mineral statistics and information from the USGS Minerals Information Web site (http://minerals.usgs.gov/minerals/pubs/country/europe.html), and (3) data collected by the USGS minerals information country specialists from sources, such as statistical publications of individual countries, annual reports and press releases of operating companies, and trade journals. Data reflect the most recently published table of industry structure for each country at the time of this publication. Additional information is available from the country specialists listed in table 2.

  19. Mineral resources of Antarctica

    Science.gov (United States)

    Compiled and edited by Wright, Nancy A.; Williams, Paul L.

    1974-01-01

    Although the existence of mineral deposits in Antarctica is highly probable, the chances of finding them are quite small. Minerals have been found there in great variety but only as occurrences. Manganese nodules, water (as ice), geothermal energy, coal, petroleum, and natural gas are potential resources that could perhaps be exploited in the future. On the basis of known mineral occurrences in Antarctica and relationships between geologic provinces of Antarctica and those of neighboring Gondwana continents, the best discovery probability for a base-metal deposit in any part of Antarctica is in the Andean orogen; it is estimated to be 0.075 (75 chances in 1,000).

  20. [Synthetic mineral fibers].

    Science.gov (United States)

    Boillat, M A

    1999-03-27

    The group of man-made mineral fibres includes slagwool, glasswool, rockwool, glass filaments and microfibres, as well as refractory ceramic fibres. The toxicity of mineral fibres is determined by several factors such as the diameter (ceramic fibres. A slightly elevated standard mortality ratio for lung cancer has been documented in large cohorts of workers (USA, Europe and Canada) exposed to man-made mineral fibres, especially in the early technological phase. It is not possible to determine from these data whether the risk of lung cancer is due to the man-made mineral fibres themselves, in particular due to the lack of data on smoking habits. No increased risk of mesothelioma has been demonstrated in these cohorts. Epidemiological data are insufficient at this time concerning neoplastic diseases in refractory ceramic fibres.

  1. Minerals in environmental technology

    Energy Technology Data Exchange (ETDEWEB)

    Schuiling, R.D. [Utrecht Univ., Utrecht (Netherlands). Faculty of Earth Sciences

    2000-07-01

    Minerals play a key role in the environment; this role is often not well understood, because the emphasis of most environmentalists is on air, water, or the composition of solid wastes as a whole, without paying attention to their mineralogical composition. Several minerals can serve as effective and cheap adsorbents for many toxic chemicals. Several minerals can be used as a cheap substitute for expensive chemicals in environmental technologies. Environmental technologies that produce an economically interesting mineral will have an edge over competing technologies. Most of the problems, overreaction, panicky and expensive measures with regard to exposure from quartz and asbestos stem from a poor understanding of natural levels of common contaminants, a disregard for mineralogy, and a lack of insight into natural processes in general.

  2. sequenceMiner algorithm

    Data.gov (United States)

    National Aeronautics and Space Administration — Detecting and describing anomalies in large repositories of discrete symbol sequences. sequenceMiner has been open-sourced! Download the file below to try it out....

  3. Vitamins and Minerals

    Science.gov (United States)

    ... minerals your body needs. But if you're skipping meals, dieting, or if you're concerned that ... Kids For Parents MORE ON THIS TOPIC Healthy Breakfast Planner Nutrition & Fitness Center Vitamin D Figuring Out ...

  4. President Ilves tänas Belgia kuningapaari õhuturbe eest

    Index Scriptorium Estoniae

    2008-01-01

    President Toomas Hendrik Ilves ja proua Evelin Ilves võtsid Kadriorus vastu Belgia kuninga Albert II ja kuninganna Paola. President T. H. Ilves tänas Eestisse riigivisiidile saabunud kuningapaari Belgia õhuturbemissiooni eest Balti riikides. Belgia sõjalennukid olid esimesed, mis võtsid Balti riikide õhuruumi kontrolli alla 29. märtsil 2004, kui Balti riigid said ametlikult NATO liikmeks

  5. Performance and Scalability of the NAS Parallel Benchmarks in Java

    Science.gov (United States)

    Frumkin, Michael A.; Schultz, Matthew; Jin, Haoqiang; Yan, Jerry; Biegel, Bryan A. (Technical Monitor)

    2002-01-01

    Several features make Java an attractive choice for scientific applications. In order to gauge the applicability of Java to Computational Fluid Dynamics (CFD), we have implemented the NAS (NASA Advanced Supercomputing) Parallel Benchmarks in Java. The performance and scalability of the benchmarks point out the areas where improvement in Java compiler technology and in Java thread implementation would position Java closer to Fortran in the competition for scientific applications.

  6. Implementation of the NAS Parallel Benchmarks in Java

    Science.gov (United States)

    Frumkin, Michael A.; Schultz, Matthew; Jin, Haoqiang; Yan, Jerry; Biegel, Bryan (Technical Monitor)

    2002-01-01

    Several features make Java an attractive choice for High Performance Computing (HPC). In order to gauge the applicability of Java to Computational Fluid Dynamics (CFD), we have implemented the NAS (NASA Advanced Supercomputing) Parallel Benchmarks in Java. The performance and scalability of the benchmarks point out the areas where improvement in Java compiler technology and in Java thread implementation would position Java closer to Fortran in the competition for CFD applications.

  7. New therapeutic perspectives in HBV: when to stop NAs.

    Science.gov (United States)

    Pérez-Cameo, Cristina; Pons, Mònica; Esteban, Rafael

    2014-02-01

    The goal of chronic hepatitis B (CHB) treatment is to achieve seroclearance of HBsAg. Nucleos(t)ide analogues (NAs) are one of the first-line treatments for CHB. NAs produce a potent suppression of viral replication but are associated with a low rate of HBsAg seroclearance and a high risk of virological relapse after discontinuation. Because of these reasons, long-term treatment is needed. They are well-tolerated oral drugs, and it seems they do not produce important side-effects in long-term administration. The duration of NA treatment remains unclear, nevertheless, in some patients NAs can be stopped with a low rate of relapse. HBeAg-positive patients could discontinue NA therapy if they achieved HBeAg seroclearance and maintain undetectable HBV DNA. For HBeAg-negative patients, to stop NA treatment is not recommended. In addition to other factors, serum HBsAg titres during treatment have recently been proposed to guide NA-based therapy duration in selected patients. All patients could be stopped from taking treatment if they achieve HBsAg loss.

  8. Study of GaInNAs Epilayers Using Optical Methods

    Science.gov (United States)

    Tsai, Yutsung

    Photovoltaic devices that convert sun's energy into electricity have the potential to influence energy needs on a global scale. A major limitation of single junction solar cells is that only photons with energy slightly above the bandgap are absorbed efficiently. One of the methods is to split the energy of the incoming spectrum into multiple bands each of which is absorbed separately for more efficient collection. That is why multijunction solar cells formed from III-V compound semiconductors are the highest efficiency photovoltaic devices today. To achieve this goal, researchers stack a number of junctions made of different materials with the highest gap material at the top and the lowest at the bottom since each material is transparent to photons with energy smaller than its bandgap. Kurtz [1] predicted an improvement in the performance of multijunction solar cells if a fourth material with bandgap in the 1.0eV-1.05eV range is included between the GaAs (bandgap = 1.42 eV) and Ge (bandgap = 0.67 eV) in the solar cell. In order for this fourth material to be easily incorporated into the GaInP/ GaAs/Ge triple junction device, it must also be lattice matched to germanium. Since it is preferred to grow multijunction solar cells monolithically lattice matching is required making the options for the 1 eV material rather limited. The most promising material for the fourth junction is currently GaInNAs. This is the reason why this thesis concentrates on the study of this material. In this thesis, we have conducted PL, optical pumping, magneto-PL, reflectance and transmission spectroscopic studies of undoped and p-type doped GaInNAs epilayers. The objective of these studies is to investigate the following phenomena in our samples: (a) Localized excitons and free excitons at low temperatures in GaInNAs epilayers: The exciton localization at low temperatures in undoped GaInNAs epilayers results in the S-shape of the PL peaks versus temperature plot. On the other hand, the

  9. Graded band gap GaInNAs solar cells

    Energy Technology Data Exchange (ETDEWEB)

    Langer, F.; Perl, S.; Kamp, M. [Technische Physik, Physikalisches Institut and Wilhelm Conrad Röntgen Research Center for Complex, Material Systems, University of Würzburg, Am Hubland, Würzburg D97074 (Germany); Höfling, S. [Technische Physik, Physikalisches Institut and Wilhelm Conrad Röntgen Research Center for Complex, Material Systems, University of Würzburg, Am Hubland, Würzburg D97074 (Germany); SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews KY16 9SS (United Kingdom)

    2015-06-08

    Dilute nitride GaInN(Sb)As with a band gap (E{sub g}) of 1.0 eV is a promising material for the integration in next generation multijunction solar cells. We have investigated the effect of a compositionally graded GaInNAs absorber layer on the spectral response of a GaInNAs sub cell. We produced band gap gradings (ΔE{sub g}) of up to 39 meV across a 1 μm thick GaInNAs layer. Thereby, the external quantum efficiency—compared to reference cells—was increased due to the improved extraction of photo-generated carriers from 34.0% to 36.7% for the wavelength range from 900 nm to 1150 nm. However, this device figure improvement is accompanied by a small decrease in the open circuit voltage of about 20 mV and the shift of the absorption edge to shorter wavelengths.

  10. 48 CFR 852.236-82 - Payments under fixed-price construction contracts (without NAS).

    Science.gov (United States)

    2010-10-01

    ... construction contracts (without NAS). 852.236-82 Section 852.236-82 Federal Acquisition Regulations System... Provisions and Clauses 852.236-82 Payments under fixed-price construction contracts (without NAS). As... “Network Analysis System (NAS).” Payments Under Fixed-Price Construction Contracts (APR 1984) The...

  11. 76 FR 1511 - Amendment of Class D Airspace; Fort Worth NAS JRB (Carswell Field), TX

    Science.gov (United States)

    2011-01-11

    ... Administration 14 CFR Part 71 Amendment of Class D Airspace; Fort Worth NAS JRB (Carswell Field), TX AGENCY... coordinates within the Fort Worth Naval Air Station (NAS) JRB (Carswell Field), TX, area and renames the... Regulations (14 CFR) part 71 by adjusting the geographic coordinates of the Fort Worth NAS JRB (Carswell...

  12. Mathematical model for bone mineralization

    Directory of Open Access Journals (Sweden)

    Svetlana V Komarova

    2015-08-01

    Full Text Available Defective bone mineralization has serious clinical manifestations, including deformities and fractures, but the regulation of this extracellular process is not fully understood. We have developed a mathematical model consisting of ordinary differential equations that describe collagen maturation, production and degradation of inhibitors, and mineral nucleation and growth. We examined the roles of individual processes in generating normal and abnormal mineralization patterns characterized using two outcome measures: mineralization lag time and degree of mineralization. Model parameters describing the formation of hydroxyapatite mineral on the nucleating centers most potently affected the degree of mineralization, while the parameters describing inhibitor homeostasis most effectively changed the mineralization lag time. Of interest, a parameter describing the rate of matrix maturation emerged as being capable of counter-intuitively increasing both the mineralization lag time and the degree of mineralization. We validated the accuracy of model predictions using known diseases of bone mineralization such as osteogenesis imperfecta and X-linked hypophosphatemia. The model successfully describes the highly non-linear mineralization dynamics, which includes an initial lag phase when osteoid is present but no mineralization is evident, then fast primary mineralization, followed by secondary mineralization characterized by a continuous slow increase in bone mineral content. The developed model can potentially predict the function for a mutated protein based on the histology of pathologic bone samples from mineralization disorders of unknown etiology.

  13. The mineral economy of Brazil--Economia mineral do Brasil

    Science.gov (United States)

    Gurmendi, Alfredo C.; Barboza, Frederico Lopes; Thorman, Charles H.

    1999-01-01

    This study depicts the Brazilian government structure, mineral legislation and investment policy, taxation, foreign investment policies, environmental laws and regulations, and conditions in which the mineral industry operates. The report underlines Brazil's large and diversified mineral endowment. A total of 37 mineral commodities, or groups of closely related commodities, is discussed. An overview of the geologic setting of the major mineral deposits is presented. This report is presented in English and Portuguese in pdf format.

  14. Princípios de suplementação mineral em ruminantes Principles of mineral supplementation in ruminants

    Directory of Open Access Journals (Sweden)

    Paulo Vargas Peixoto

    2005-09-01

    Full Text Available Muito embora já haja um sólido conhecimento sobre as deficiências minerais e suas conseqüências para a saúde e a produtividade dos bovinos no Brasil, paradoxalmente, essas informações, na maioria das vezes, não vêm sendo empregadas pelos profissionais das ciências agrárias, que persistem em estimular o uso generalizado das misturas minerais ditas completas. A deficiência de diversos minerais incluídos nestes suplementos, como ferro, cromo, enxofre, entre outros, não ocorre sob condições naturais ou só existe em raras situações muito particulares. O presente tópico aborda os equívocos e problemas relacionados com a suplementação mineral tradicionalmente feita e discute os principais aspectos da denominada suplementação mineral seletiva, que é fundamentada no fornecimento exclusivo do(s mineral(is deficiente(s e na(s quantidade(s necessária(s. Essa alternativa pode permitir uma economia expressiva (por vezes, de até 700% em relação à suplementação mineral comercial normalmente utilizada. De acordo com diversas estimativas, a suplementação mineral pode constituir de 20 a 30 % dos custos totais de produção de gado de corte criados em pastagens, daí a importância de diminuir esses gastos. Um ensaio de reversão, no qual um grupo de animais recebe a mistura mineral comercial rotineiramente utilizada na propriedade e outro grupo, o suplemento seletivo, é a melhor opção para discriminar os efeitos (positivos ou negativos entre dois esquemas de suplementação mineral para uma específica fazenda. Por esse ensaio, investigam-se, racionalmente e por um longo período, os efeitos das duas opções de suplementação mineral em teste, com mínimo risco de perdas econômicas.Although there is solid knowledge on mineral deficiencies and their consequences on health and productivity of cattle in Brazil, paradoxically, those informations, most of the time, are not used by professionals of the agricultural sciences, who

  15. Measuring the Hardness of Minerals

    Science.gov (United States)

    Bushby, Jessica

    2005-01-01

    The author discusses Moh's hardness scale, a comparative scale for minerals, whereby the softest mineral (talc) is placed at 1 and the hardest mineral (diamond) is placed at 10, with all other minerals ordered in between, according to their hardness. Development history of the scale is outlined, as well as a description of how the scale is used…

  16. Microminerais para bovinos de corte nas pastagens nativas dos Campos de Cima da Serra, RS, Brasil

    Directory of Open Access Journals (Sweden)

    Wunsch Carolina

    2005-01-01

    Full Text Available Em face das poucas informações disponíveis sobre a composição mineral das pastagens nativas da região dos Campos de Cima da Serra (RS, o presente trabalho de pesquisa objetivou avaliar os teores dos principais microminerais, em diferentes épocas do ano, e relacionar o perfil mineral destas pastagens com as necessidades nutricionais recomendadas pelo NRC (1996 para bovinos de corte. O projeto foi conduzido em vinte propriedades particulares, em Cambará do Sul, utilizando áreas de campo nativo que estavam sendo normalmente utilizadas em pastoreio por bovinos de corte e/ou ovinos, e que não tinham sofrido nenhum tipo de melhoria, reforma ou recuperação (exceto queimada, no mínimo nos últimos 20 anos. Colheram-se nas diversas estações, durante um ano, e dentro de uma mesma área predeterminada em cada propriedade, amostras para determinar as concentrações de ferro, manganês, cobre e zinco. Verificou-se efeito do mês de coleta sobre todos os minerais analisados. Constataram-se teores suficientes de Mn e Fe para todas as categorias de bovinos de corte analisadas. Entretanto, algumas amostras apresentaram níveis tóxicos aos animais. Os teores de Cu não são suficientes para todas as categorias de bovinos em alguns meses do ano. Os teores de Zn estiveram abaixo das exigências mínimas para bovinos de corte.

  17. Extraterrestrial magnetic minerals

    Science.gov (United States)

    Pechersky, D. M.; Markov, G. P.; Tsel'movich, V. A.; Sharonova, Z. V.

    2012-07-01

    Thermomagnetic and microprobe analyses are carried out and a set of magnetic characteristics are measured for 25 meteorites and 3 tektites from the collections of the Vernadsky Geological Museum of the Russian Academy of Sciences and Museum of Natural History of the North-East Interdisciplinary Science Research Institute, Far Eastern Branch of the Russian Academy of Sciences. It is found that, notwithstanding their type, all the meteorites contain the same magnetic minerals and only differ by concentrations of these minerals. Kamacite with less than 10% nickel is the main magnetic mineral in the studied samples. Pure iron, taenite, and schreibersite are less frequent; nickel, various iron spinels, Fe-Al alloys, etc., are very rare. These minerals are normally absent in the crusts of the Earth and other planets. The studied meteorites are more likely parts of the cores and lower mantles of the meteoritic parent bodies (the planets). Uniformity in the magnetic properties of the meteorites and the types of their thermomagnetic (MT) curves is violated by secondary alterations of the meteorites in the terrestrial environment. The sediments demonstrate the same monotony as the meteorites: kamacite is likely the only extraterrestrial magnetic mineral, which is abundant in sediments and associated with cosmic dust. The compositional similarity of kamacite in iron meteorites and in cosmic dust is due to their common source; the degree of fragmentation of the material of the parent body is the only difference.

  18. Thorium in mineral products.

    Science.gov (United States)

    Collier, D E; Brown, S A; Blagojevic, N; Soldenhoff, K H; Ring, R J

    2001-01-01

    Many ores contain low levels of thorium. When these ores are processed, the associated radioactivity can be found in mineral concentrates, intermediates and final products. There is an incentive for industries to remove radioactivity from mineral products to allow the movement and sale of these materials, both nationally and internationally, without the need for licensing. Control of thorium in various products involves the development and optimisation of process steps to be able to meet product specifications. The Australian Nuclear Science and Technology Organisation (ANSTO) has undertaken a range of R & D programmes targeting the treatment of thorium-bearing minerals. This paper discusses the application of a microprobe technique for siting radioactivity in zircon and ilmenite and the problems experienced in measuring the concentrations in solid rare earth products.

  19. Concreto submetido a vibrações nas primeiras idades

    Directory of Open Access Journals (Sweden)

    J. F. Fernandes

    Full Text Available Este artigo traz informações sobre o comportamento nas primeiras idades de um concreto de alta resistência, produzido com cimento de alta resistência inicial, lançado e adensado em ambientes submetidos a vibrações, como em obras de pontes de rodovias. Apresenta-se o programa experimental desenvolvido, descrevendo desde a moldagem dos corpos-de-prova, sob ação de vibrações similares às induzidas pelo tráfego, até os ensaios de caracterização mecânica e de aderência aço-concreto. Os resultados experimentais indicam que o concreto submetido à vibração nas primeiras idades pode sofrer perdas na resistência à tração e no módulo de elasticidade. A redução dessas propriedades pode comprometer a utilização da estrutura devido ao aparecimento de flechas e fissuras acima dos limites de norma. A redução da resistência à tração do concreto deve ser considerada, também, na aplicação de pavimentos rígidos, onde essa propriedade é fundamental para garantir a durabilidade do sistema. Não foi observada nenhuma redução na resistência à compressão ou na capacidade de aderência devido à introdução de vibrações nas primeiras idades do concreto.

  20. Microbially mediated mineral carbonation

    Science.gov (United States)

    Power, I. M.; Wilson, S. A.; Dipple, G. M.; Southam, G.

    2010-12-01

    Mineral carbonation involves silicate dissolution and carbonate precipitation, which are both natural processes that microorganisms are able to mediate in near surface environments (Ferris et al., 1994; Eq. 1). (Ca,Mg)SiO3 + 2H2CO3 + H2O → (Ca,Mg)CO3 + H2O + H4SiO4 + O2 (1) Cyanobacteria are photoautotrophs with cell surface characteristics and metabolic processes involving inorganic carbon that can induce carbonate precipitation. This occurs partly by concentrating cations within their net-negative cell envelope and through the alkalinization of their microenvironment (Thompson & Ferris, 1990). Regions with mafic and ultramafic bedrock, such as near Atlin, British Columbia, Canada, represent the best potential sources of feedstocks for mineral carbonation. The hydromagnesite playas near Atlin are a natural biogeochemical model for the carbonation of magnesium silicate minerals (Power et al., 2009). Field-based studies at Atlin and corroborating laboratory experiments demonstrate the ability of a microbial consortium dominated by filamentous cyanobacteria to induce the precipitation of carbonate minerals. Phototrophic microbes, such as cyanobacteria, have been proposed as a means for producing biodiesel and other value added products because of their efficiency as solar collectors and low requirement for valuable, cultivable land in comparison to crops (Dismukes et al., 2008). Carbonate precipitation and biomass production could be facilitated using specifically designed ponds to collect waters rich in dissolved cations (e.g., Mg2+ and Ca2+), which would allow for evapoconcentration and provide an appropriate environment for growth of cyanobacteria. Microbially mediated carbonate precipitation does not require large quantities of energy or chemicals needed for industrial systems that have been proposed for rapid carbon capture and storage via mineral carbonation (e.g., Lackner et al., 1995). Therefore, this biogeochemical approach may represent a readily

  1. Proteínas de arroz: propiedades estructurales y funcionales

    OpenAIRE

    2011-01-01

    Objetivo general: Estudiar las proteínas de arroz de la variedad Nutriar desde el punto de vista estructural y funcional provenientes de grano pulido e integral. Compararlas con las de una variedad de amplio uso local, de calidad tropical. Objetivos específicos: Determinar la composición proteica, cuali y cuantitativamente de la variedad Nutriar en comparación con la variedad de referencia. Explorar distintos métodos de preparación de aislados proteicos mediante la variaci...

  2. PROTEÍNAS: REDEFINIENDO ALGUNOS CONCEPTOS Proteins: redefined some concepts

    Directory of Open Access Journals (Sweden)

    Juan Camilo Calderón Vélez

    2006-06-01

    Full Text Available El conocimiento sobre las estructuras primarias, secundarias y terciarias de las proteínas crece cada día; la terminología y su adecuado uso, incluso para los conocedores, pueden resultar confusos. Se propone en esta comunicación una forma sencilla y práctica de abordar el tema.Our knowledge about primary, secondary and tertiary structures of proteins grow-up every day. Terminology and its use can result difficult, even for knowledge people. This paper propose a simple and practical, often personal, way of utilization.

  3. Adjetivos nas gramáticas do português

    Directory of Open Access Journals (Sweden)

    Roberto Santos de Carvalho

    2011-02-01

    Full Text Available Este artigo visa a apontar que mesmo depois de cinco décadas do advento da Nomenclatura Gramatical Brasileira (NGB, ainda seja possível perceber, nas gramáticas do português, uma variedade de códigos terminológicos para se referir ao mesmo tipo de adjetivo. Visamos, com isso, levantar alguns questionamentos acerca dos motivos pelos quais ainda persiste um conflito de termos em torno da classe dos adjetivos, além de sinalizar a possibilidade de simplificação e padronização dos conceitos e da nomenclatura conflitante.

  4. Abuso de poder nas eleições

    OpenAIRE

    Isumi, Francy

    2013-01-01

    O trabalho realiza análise acerca do abuso de poder nas eleições, seja na forma de abuso de poder político, abuso de poder económico e uso indevido dos meios de comunicação. Para tanto, primeiramente foi analisado o plano do direito material, abordando-se as principais leis que tratam do tema, a arrecadação e gastos de recursos durante a campanha eleitoral, a prestação de contas, as condutas vedadas aos agentes públicos, bem como a interpretação do Tribunal Superior Eleitoral sobre alguns des...

  5. Mineralization of fossil wood

    NARCIS (Netherlands)

    Buurman, P.

    1972-01-01

    Several pieces of fossil wood have been analyzed with X-ray diffraction and were grouped on the basis of mineralogical composition. Various mineralizations were studied in thin sections and by means of the scanning electron microscope. Wood-opals appear to show a structure preservation that points t

  6. Clay Mineral: Radiological Characterization

    Science.gov (United States)

    Cotomácio, J. G.; Silva, P. S. C.; Mazzilli, B. P.

    2008-08-01

    Since the early days, clays have been used for therapeutic purposes. Nowadays, most minerals applied as anti-inflammatory, pharmaceutics and cosmetic are the clay minerals that are used as the active ingredient or, as the excipient, in formulations. Although their large use, few information is available in literature on the content of the radionuclide concentrations of uranium and thorium natural series and 40K in these clay minerals. The objective of this work is to determine the concentrations of 238U, 232Th, 226Ra, 228Ra, 210Pb and 40K in commercial samples of clay minerals used for pharmaceutical or cosmetic purposes. Two kinds of clays samples were obtained in pharmacies, named green clay and white clay. Measurement for the determination of 238U and 232Th activity concentration was made by alpha spectrometry and gamma spectrometry was used for 226Ra, 228Ra, 210Pb and 40K determination. Some physical-chemical parameters were also determined as organic carbon and pH. The average activity concentration obtained was 906±340 Bq kg-1 for 40K, 40±9 Bq kg-1 for 226Ra, 75±9 Bq kg-1 for 228Ra, 197±38 Bq kg-1 for 210Pb, 51±26 Bq kg-1 for 238U and 55±24 Bq kg-1 for 232Th, considering both kinds of clay.

  7. Mixtures and mineral reactions

    Energy Technology Data Exchange (ETDEWEB)

    Saxena, S.; Ganguly, J.

    1987-01-01

    Considerable progress has been made in our understanding of the physicochemical evolution of natural rocks through systematic analysis of the compositional properties and phase relations of their mineral assemblages. This book brings together concepts of classical thermodynamics, solution models, and atomic ordering and interactions that constitute a basis of such analysis, with examples of application to subsolidus petrological problems.

  8. Bioleaching of Minerals

    Energy Technology Data Exchange (ETDEWEB)

    F. Roberto

    2002-02-01

    Bioleaching is the term used to describe the microbial dissolution of metals from minerals. The commercial bioleaching of metals, particularly those hosted in sulfide minerals, is supported by the technical disciplines of biohydrometallurgy, hydrometallurgy, pyrometallurgy, chemistry, electrochemistry, and chemical engineering. The study of the natural weathering of these same minerals, above and below ground, is also linked to the fields of geomicrobiology and biogeochemistry. Studies of abandoned and disused mines indicate that the alterations of the natural environment due to man's activities leave as remnants microbiological activity that continues the biologically mediated release of metals from the host rock (acid rock drainage; ARD). A significant fraction of the world's copper, gold and uranium is now recovered by exploiting native or introduced microbial communities. While some members of these unique communities have been extensively studied for the past 50 years, our knowledge of the composition of these communities, and the function of the individual species present remains relatively limited. Nevertheless, bioleaching represents a major strategy in mineral resource recovery whose importance will increase as ore reserves decline in quality, become more difficult to process (due to increased depth, increased need for comminution, for example), and as environmental considerations eliminate traditional physical processes such as smelting, which have served the mining industry for hundreds of years.

  9. UAS-NAS Project Demo - Mini HITL Week 2 Stats

    Science.gov (United States)

    Murphy, James R.; Fern, Lisa C.; Rorie, Robert C.; Shively, Robert; Jovic, Srboljub

    2016-01-01

    The UAS-NAS Project demo will showcase recent research efforts to ensure the interoperability between proposed UAS detect and avoid (DAA) human machine interface requirements (developed within RTCA SC-228) and existing collision avoidance displays. Attendees will be able to view the current state of the art of the DAA pilot traffic, alerting and guidance displays integrated with Traffic advisory and Collision Avoidance (TCAS) II in the UAS-NAS Project's research UAS ground control station (developed in partnership with the Air Force Research Laboratory). In addition, attendees will have the opportunity to interact with the research UAS ground control station and "fly" encounters, using the DAA and TCAS II displays to avoid simulated aircraft. The display of the advisories will be hosted on a laptop with an external 30" monitor, running the Vigilant Spirit system. DAA advisories will be generated by the JADEM software tool, connected to the system via the LVC Gateway. A repeater of the primary flight display will be shown on a 55" monitor mounted on a stand at the back of the booth to show the pilot interaction to the passersby.

  10. Paradigma e Disciplina nas Perspectivas de Kuhn e Morin

    Directory of Open Access Journals (Sweden)

    Sérgio Luís Boeira

    2009-07-01

    Full Text Available http://dx.doi.org/10.5007/1807-1384.2009v6n1p90   Este ensaio compara o conceito de paradigma nas perspectivas de Thomas Kuhn e Edgar Morin. Apesar da relevância internacional de suas obras e de suas contribuições para a história da ciência e para a filosofia da ciência, observa-se na literatura uma falta de estudos comparativos sobre suas principais idéias, o que tem gerado confusões e simplificações. O ensaio parte de extensa pesquisa de obras publicadas pelos autores em âmbito internacional. Na primeira seção, trata-se da perspectiva de Kuhn sobre diversas noções, como paradigma, matriz disciplinar, comunidade científica e incomensurabilidade. Na segunda, examina-se a perspectiva de Morin sobre paradigma disjuntor-redutor e paradigma da complexidade. Na terceira seção, comparam-se suas perspectivas sobre progresso científico, a partir da noção de disciplina, para discernir aspectos convergentes e divergentes em suas obras, resumidos nas conclusões. Palavras-chave: Paradigma; Disciplina; Filosofia da ciência.

  11. Data communication requirements for the advanced NAS network

    Science.gov (United States)

    Levin, Eugene; Eaton, C. K.; Young, Bruce

    1986-01-01

    The goal of the Numerical Aerodynamic Simulation (NAS) Program is to provide a powerful computational environment for advanced research and development in aeronautics and related disciplines. The present NAS system consists of a Cray 2 supercomputer connected by a data network to a large mass storage system, to sophisticated local graphics workstations, and by remote communications to researchers throughout the United States. The program plan is to continue acquiring the most powerful supercomputers as they become available. In the 1987/1988 time period it is anticipated that a computer with 4 times the processing speed of a Cray 2 will be obtained and by 1990 an additional supercomputer with 16 times the speed of the Cray 2. The implications of this 20-fold increase in processing power on the data communications requirements are described. The analysis was based on models of the projected workload and system architecture. The results are presented together with the estimates of their sensitivity to assumptions inherent in the models.

  12. O Brasil rural nas obras de Monteiro Lobato nas décadas de 1910 a 1930

    OpenAIRE

    Silva, Luciana Meire da [UNESP

    2013-01-01

    Nesta pesquisa analisamos sociologicamente as obras de Monteiro Lobato, publicadas nas décadas de 1910 a 1930, como fontes importantes de interpretações das particularidades e especificidades da sociedade rural brasileira. Entendemos que Monteiro Lobato não se propôs a ser “sociólogo” como Alberto Torres, Oliveira Viana, entre outros, mas, nossa análise buscou em suas historietas, contos e crônicas uma “sociologia” do Brasil rural das décadas de 1910 a 1930. Embora o pensamento de Monteiro Lo...

  13. 基于NAS Benchmarks的ORC性能测试%The Performance of ORC with NAS Benchmarks

    Institute of Scientific and Technical Information of China (English)

    林海波; 汤志忠

    2003-01-01

    Itanium is the first generation product processor based on IA-64 architecture. ORC(Open Research Compil-er )provides an open source IPF(Itanium Processor Family)research compiler infrastructure. We have compiled andrun NAS Benchmarks on the Itanium machine. This paper briefly describes the performance of orcc, sgicc and gcc inthe following 3 ways: execution time, compilation time, and executable file size. The results show that orcc has near-ly the same performance as sgicc, which is 2 fold faster over gcc in the aspect of execution time. We also find that evenwith the best-optimized program, the utilization ratio of process resources is no more that 70%.

  14. Aggregate and Mineral Resources - Industrial Mineral Mining Operations

    Data.gov (United States)

    NSGIC Education | GIS Inventory — An Industrial Mineral Mining Operation is a DEP primary facility type related to the Industrial Mineral Mining Program. The sub-facility types are listed below:Deep...

  15. Aggregate and Mineral Resources - Industrial Mineral Mining Operations

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — An Industrial Mineral Mining Operation is a DEP primary facility type related to the Industrial Mineral Mining Program. The sub-facility types are listed below:Deep...

  16. Carbon Mineral Ecology: Predicting the Undiscovered Minerals of Carbon

    Science.gov (United States)

    Hazen, R. M.; Hummer, D. R.; Downs, R. T.; Hystad, G.; Golden, J.

    2015-12-01

    The diversity and distribution of Earth's minerals through deep time reflects key events in our planet's crustal evolution. Studies in mineral ecology exploit mineralogical databases to document diversity-distribution relationships of minerals, which reveal that all carbon-bearing minerals, as well as subsets containing C with O, H, Ca, or Na, conform to Large Number of Rare Events (LNRE) distributions. LNRE models facilitate prediction of total mineral diversity, and thus point to minerals that exist on Earth but have not yet been discovered and described. Our model predicts that at least 548 C minerals exist on Earth today, indicating that at least 145 carbon-bearing mineral species have yet to be discovered. Furthermore, by analyzing subsets of the most common additional elements in carbon-bearing minerals (i.e., 378 C + O species; 282 C + H species; 133 C + Ca species; and 100 C + Na species), we predict that 129 of these missing carbon minerals contain oxygen, 118 contain hydrogen, 52 contain calcium, and more than 60 contain sodium. The majority of these as yet undescribed minerals are predicted to be hydrous carbonates, many of which may have been overlooked because they are colorless, poorly crystalized, and/or water-soluble. We propose the identities of plausible as yet undescribed carbon minerals, as well as search strategies for their discovery. Some of these minerals will be natural examples of known synthetic compounds, including carbides such as calcium carbide (CaC2), crystalline hydrocarbons such as pyrene (C16H10), and numerous oxalates, anhydrous carbonates, and hydrous carbonates. Many other missing carbon minerals will be isomorphs of known carbon minerals, notably of the more than 100 different hydrous carbonate structures. An understanding of Earth's "missing" minerals provides a more complete picture of geochemical processes that influence crustal evolution.

  17. Mineral processing of heavy mineral sands from Malawi and Malaysia

    OpenAIRE

    Mitchell, C J

    1992-01-01

    Processing of heavy mineral sands involves many techniques including gravity, magnetic and electrostatic separation. As part of a laboratory programme to develop effective mineral processing techniques, two mineral sands from Malawi and Malaysia were processed using the standard techniques, with emphasis placed on the Carpco electrostatic separator. These sands were initially characterised mineralogically by scanning electron microscopy (SEM), electron microprobe analysis (EPMA...

  18. Adsorption of RNA on mineral surfaces and mineral precipitates

    Science.gov (United States)

    Biondi, Elisa; Furukawa, Yoshihiro; Kawai, Jun

    2017-01-01

    The prebiotic significance of laboratory experiments that study the interactions between oligomeric RNA and mineral species is difficult to know. Natural exemplars of specific minerals can differ widely depending on their provenance. While laboratory-generated samples of synthetic minerals can have controlled compositions, they are often viewed as "unnatural". Here, we show how trends in the interaction of RNA with natural mineral specimens, synthetic mineral specimens, and co-precipitated pairs of synthetic minerals, can make a persuasive case that the observed interactions reflect the composition of the minerals themselves, rather than their being simply examples of large molecules associating nonspecifically with large surfaces. Using this approach, we have discovered Periodic Table trends in the binding of oligomeric RNA to alkaline earth carbonate minerals and alkaline earth sulfate minerals, where those trends are the same when measured in natural and synthetic minerals. They are also validated by comparison of co-precipitated synthetic minerals. We also show differential binding of RNA to polymorphic forms of calcium carbonate, and the stabilization of bound RNA on aragonite. These have relevance to the prebiotic stabilization of RNA, where such carbonate minerals are expected to have been abundant, as they appear to be today on Mars.

  19. Efeito do armazenamento de argilas esmectíticas nas suas propriedades reológicas

    Directory of Open Access Journals (Sweden)

    I. A. da Silva

    Full Text Available Resumo Este trabalho investigou a influência do armazenamento de argilas esmectíticas naturais e industrializadas nas suas propriedades reológicas, tendo em vista que a reação de dupla troca que ocorre após o tratamento das argilas policatiônicas com o Na2CO3 é reversível. Os fenômenos envolvidos nesta reação ainda não são totalmente conhecidos e estudos anteriores mostram melhoras em algumas propriedades. As propriedades reológicas foram determinadas em argilas sódicas em 1995 e policatiônicas aditivadas com carbonato de sódio (Na2CO3 em 2015. A caracterização física, química e mineralógica das amostras foi realizada através das seguintes técnicas: análise granulométrica por difração a laser, composição química por fluorescência de raios X, difração de raios X e análises térmicas (DTA e TG. A reologia das dispersões foi determinada através da viscosidade aparente, viscosidade plástica e volume do filtrado, onde posteriormente foram consideradas normas da indústria do petróleo apenas como parâmetro de referência. Os resultados mostraram que as condições de armazenamento, umidade e tamanho de partículas das amostras trouxeram melhoras nas suas propriedades reológicas no decorrer dos anos, indicando a não reversibilidade da reação de troca de cátions, o que é importante na sua validade após fabricação.

  20. Oxygen Extraction from Minerals

    Science.gov (United States)

    Muscatello, Tony

    2017-01-01

    Oxygen, whether used as part of rocket bipropellant or for astronaut life support, is a key consumable for space exploration and commercialization. In Situ Resource Utilization (ISRU) has been proposed many times as a method for making space exploration more cost effective and sustainable. On planetary and asteroid surfaces the presence of minerals in the regolith that contain oxygen is very common, making them a potential oxygen resource. The majority of research and development for oxygen extraction from minerals has been for lunar regolith although this work would generally be applicable to regolith at other locations in space. This presentation will briefly survey the major methods investigated for oxygen extraction from regolith with a focus on the current status of those methods and possible future development pathways. The major oxygen production methods are (1) extraction from lunar ilmenite (FeTiO3) with either hydrogen or carbon monoxide, (2) carbothermal reduction of iron oxides and silicates with methane, and (3) molten regolith electrolysis (MRE) of silicates. Methods (1) and (2) have also been investigated in a two-step process using CO reduction and carbon deposition followed by carbothermal reduction. All three processes have byproducts that could also be used as resources. Hydrogen or carbon monoxide reduction produce iron metal in small amounts that could potentially be used as construction material. Carbothermal reduction also makes iron metal along with silicon metal and a glass with possible applications. MRE produces iron, silicon, aluminum, titanium, and glass, with higher silicon yields than carbothermal reduction. On Mars and possibly on some moons and asteroids, water is present in the form of mineral hydrates, hydroxyl (-OH) groups on minerals, andor water adsorbed on mineral surfaces. Heating of the minerals can liberate the water which can be electrolyzed to provide a source of oxygen as well. The chemistry of these processes, some key

  1. 1.15 Å resolution structure of the proteasome-assembly chaperone Nas2 PDZ domain

    Energy Technology Data Exchange (ETDEWEB)

    Singh, Chingakham R. [Kansas State University, 338 Ackert Hall, Manhattan, KS 66506 (United States); Lovell, Scott; Mehzabeen, Nurjahan [University of Kansas, Del Shankel Structural Biology Center, Lawrence, KS 66047 (United States); Chowdhury, Wasimul Q.; Geanes, Eric S. [Kansas State University, 338 Ackert Hall, Manhattan, KS 66506 (United States); Battaile, Kevin P. [IMCA-CAT Hauptman–Woodward Medical Research Institute, 9700 South Cass Avenue, Building 435A, Argonne, IL 60439 (United States); Roelofs, Jeroen, E-mail: jroelofs@ksu.edu [Kansas State University, 338 Ackert Hall, Manhattan, KS 66506 (United States)

    2014-03-25

    The proteasome-assembly chaperone Nas2 binds to the proteasome subunit Rpt5 using its PDZ domain. The structure of the Nas2 PDZ domain has been determined. The 26S proteasome is a 2.5 MDa protease dedicated to the degradation of ubiquitinated proteins in eukaryotes. The assembly of this complex containing 66 polypeptides is assisted by at least nine proteasome-specific chaperones. One of these, Nas2, binds to the proteasomal AAA-ATPase subunit Rpt5. The PDZ domain of Nas2 binds to the C-terminal tail of Rpt5; however, it does not require the C-terminus of Rpt5 for binding. Here, the 1.15 Å resolution structure of the PDZ domain of Nas2 is reported. This structure will provide a basis for further insights regarding the structure and function of Nas2 in proteasome assembly.

  2. In vivo inhibition of NAS preparation on H9N2 subtype AIV.

    Science.gov (United States)

    Shang, Ruo-feng; Liang, Jian-ping; Na, Zhong-yuan; Yang, Hong-jun; Lu, Yu; Hua, Lan-ying; Guo, Wen-zhu; Cui, Ying; Wang, Ling

    2010-04-01

    NAS preparation, a kind of Chinese herbal medicine found by the Yunnan Eco-agricultural Research Institute, has potential antiviral activity. In this paper, the inhibiting effect of NAS preparation on H9N2 subtype Avian influenza virus (AIV) was investigated in vivo. Chickens infected with H9N2 virus were treated with NAS preparation for 4 days. The virus was then detected by hemoagglutination (HA) test and reverse transcription polymerase chain reaction (RT-PCR). The results showed that no H9N2 virus could be detected at the 7th day when the chickens were treated with 0.2 g/kg/d or 0.1 g/kg/d of NAS preparation. However the virus could be detected in other chickens without NAS preparation treatment. This result suggested that NAS preparation may be a potential drug candidate to control infection of H9N2 subtype AIV in chickens.

  3. Marine minerals: The Indian perspective

    Digital Repository Service at National Institute of Oceanography (India)

    Gujar, A.R.; Nath, B.N.; Banerjee, R.

    The sea floor of the continental margins of India is covered by a wide variety of terrigenous, biogenous, and chemogenous mineral deposits. Terrigenous heavy mineral placers containing ilmenite, magnetite, monazite, zircon, and rutile are reported...

  4. Unmixing of spectrally similar minerals

    CSIR Research Space (South Africa)

    Debba, Pravesh

    2009-01-01

    Full Text Available -bearing oxide/hydroxide/sulfate minerals in complex mixtures be obtained using hyperspectral data? Debba (CSIR) Unmixing of spectrally similar minerals MERAKA 2009 3 / 18 Method of spectral unmixing Old method: problem Linear Spectral Mixture Analysis (LSMA...

  5. Agricultural Minerals Operations - Direct Download

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This map layer includes agricultural minerals operations in the United States. The data represent commodities covered by the Minerals Information Team (MIT) of the...

  6. Construction Minerals Operations - Direct Download

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This map layer includes construction minerals operations in the United States. The data represent commodities covered by the Minerals Information Team (MIT) of the...

  7. Discussion on Nontraditional Mineral Resources

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    In this paper, the authors introduce the concept of nontraditional mineral resources, and pro pose the major system of nontraditional mineral resources, including nontraditional resources, research methods, mining and mineral economics. Then the authors conclude that the research on nontraditional mineral resources is not only significant to satisfication the human needs in the 21st century, but also important to the development of the present geological theory.

  8. Aggregates from mineral wastes

    Directory of Open Access Journals (Sweden)

    Baic Ireneusz

    2016-01-01

    Full Text Available The problem concerning the growing demand for natural aggregates and the need to limit costs, including transportation from remote deposits, cause the increase in growth of interest in aggregates from mineral wastes as well as in technologies of their production and recovery. The paper presents the issue related to the group of aggregates other than natural. A common name is proposed for such material: “alternative aggregates”. The name seems to be fully justified due to adequacy of this term because of this raw materials origin and role, in comparison to the meaning of natural aggregates based on gravel and sand as well as crushed stones. The paper presents characteristics of the market and basic application of aggregates produced from mineral wastes, generated in the mining, power and metallurgical industries as well as material from demolished objects.

  9. Rock and mineral magnetism

    CERN Document Server

    O’Reilly, W

    1984-01-01

    The past two decades have witnessed a revolution in the earth sciences. The quantitative, instrument-based measurements and physical models of. geophysics, together with advances in technology, have radically transformed the way in which the Earth, and especially its crust, is described. The study of the magnetism of the rocks of the Earth's crust has played a major part in this transformation. Rocks, or more specifically their constituent magnetic minerals, can be regarded as a measuring instrument provided by nature, which can be employed in the service of the earth sciences. Thus magnetic minerals are a recording magnetometer; a goniometer or protractor, recording the directions of flows, fields and forces; a clock; a recording thermometer; a position recorder; astrain gauge; an instrument for geo­ logical surveying; a tracer in climatology and hydrology; a tool in petrology. No instrument is linear, or free from noise and systematic errors, and the performance of nature's instrument must be assessed and ...

  10. Iodine mineral waters

    Directory of Open Access Journals (Sweden)

    Iluta Alexandru

    2011-11-01

    Full Text Available Iodine mineral waters are found especially in sub-Carpathian region, also in regions with Salif deposits. Waters are currently used iodine in drinking cure for chaps and Basedow. Are also indicated in balneology. Iodine water containing at least 1 mg L, there is pure iodine is usually given the nature of other types of mineral waters further: sodium chlorinated water (Bazna (50-70 mg iodine / l, Baile Govora (50 - 70 mg / l, Bălţăteşti (4-5 mg / l, salted Monteoru (30 mg / l, mine water mixed alkaline chlorination, sulphate, which are indicated for crenoterapie (hypo or isotonic to the bathrooms Olăneşti or Călimăneşti-Căciulata.

  11. Coastal placer minerals

    Digital Repository Service at National Institute of Oceanography (India)

    Iyer, S.D.; Gujar, A.R.

    by mechanical concentration and natural gravity separation of mineral particles derived from weathered rocks. The formation of placers requires factors such as: climate, source rock, weathering, transport, deposition, concentration, high specific gravity... and transport of the rocks. For example, in cold and glaciated regions, there would be limited physical weathering and less concentration and more dispersion of the weathered material and placers would not FE AT U R E FE AT U R E A RT IC LE form...

  12. Mineral metabolism in cats

    OpenAIRE

    Pineda Martos, Carmen María

    2014-01-01

    The present Doctoral Thesis wa metabolism in the feline species. Through a series of studies, the relationship between calcium metabolism and the main hormones involved in it has been determined metabolism during the juvenile stage of growing cats effects linked to feeding calculolytic diets on feline mineral metabolism. The first part of the work was aimed the quantification of intact (I-PTH) and whole PTH) and to characterize the dynamics of PTH secretion, including ...

  13. Culture systems: mineral oil overlay.

    Science.gov (United States)

    Morbeck, Dean E; Leonard, Phoebe H

    2012-01-01

    Mineral oil overlay microdrop is commonly used during in vitro fertilization (IVF) procedures. Though mineral oil appears homogeneous, it is an undefined product that can vary in quality. Here, we describe the history, chemistry, processing, and optimal use of mineral oil for IVF and embryo culture.

  14. Polymer-mediated mesoscale mineralization

    Institute of Scientific and Technical Information of China (English)

    CHEN ShaoFeng; YU ShuHong

    2009-01-01

    Polymer-controlled mineralization in aqueous solution or in a mixed solvent media, as well as its com-bination with the interface of air-water can lead to the formation of minerals with unique structures and morphologies, which sheds light on the possibility to mimic the detailed structures of the natural min-erals.

  15. Definitions of Health Terms: Minerals

    Science.gov (United States)

    ... this page: https://medlineplus.gov/definitions/mineralsdefinitions.html Definitions of Health Terms : Minerals To use the sharing features on ... of the minerals that you need. Find more definitions on Fitness | General Health | Minerals | Nutrition | Vitamins Antioxidants Antioxidants are substances that ...

  16. Refractory Minerals in Henan Province

    Institute of Scientific and Technical Information of China (English)

    JIN Qinguo; LI Jing; LIU Jiehua; LIU Yanjun

    2004-01-01

    Henan province is very rich in refractory minerals of many varieties including silica, dolomite, graphite,pearlite, sepiolite, olivine, and sillimanite group minerals, besides the abundant reserves of fireclay and bauxite,which lay a good foundation for the development of the refractories industry of the province. The paper introduces the reserves, distribution and character of the refractory minerals in Henan province.

  17. PROTEÍNAS EXTRACELULARES MARCADORAS DEL POTENCIAL EMBRIOGÉNICO EN SUSPENSIONES CELULARES DE Coffea spp.

    OpenAIRE

    Mayra Rodríguez; Cevallos, A M; Silvia Montes

    2000-01-01

    Se realizó un estudio de las proteínas extracelulares EP3 y PE32 en suspensiones celulares de Coffea canephora var. Robusta y Coffea arabica cv. Catimor. El proceso embriogénico fue caracterizado inmunoquímicamente con la utilización de anticuerpos policlonales de ambas proteínas. El carácter embriogénico del cultivo se corroboró por el comportamiento de las proteínas estudiadas presentes en la matriz extracelular. Se sugiere la utilización de estas proteínas como marcadores moleculares de la...

  18. Realismo versus globalismo nas relações internacionais

    OpenAIRE

    Tullo Vigevani; Veiga,João Paulo C.; Mariano,Karina Lilia P.

    1994-01-01

    Discute-se a influência que os temas econômicos produzem nas bases do poder mundial, tradicionalmente vinculadas aos temas clássicos da estratégia e das relações de poder. Para isso, discutem-se dois pontos de vista teóricos centrais no debate contemporâneo sobre as relações internacionais, o realismo e o globa-lismo, concluindo-se que as divergências existentes não excluem percepões semelhantes no que toca à visão de mundo. As teorias da estabilidade hegemônica e da interdependência complexa...

  19. Sobre a Pesquisa nas Artes: um discurso amoroso

    Directory of Open Access Journals (Sweden)

    Victoria Pérez Royo

    2015-09-01

    Full Text Available Este artigo resulta de um exercício de reescrita experimental e de um pensamento analógico cujo objetivo era abrir uma nova perspectiva sobre pesquisa nas artes. Metodologicamente, as diferentes figuras de amor no livro Fragmentos de um Discurso Amoroso, de Barthes, são levadas a conversar sobre a relação entre pesquisador e objeto de estudo. Essa analogia nos permite encontrar parâmetros de qualidade baseados em uma escala de valores diferentes dos hegemônicos na academia (produtividade, competitividade, inovação. Esses novos parâmetros podem constituir uma sólida base ontológica para a construção de uma nova política de pesquisa artística na academia que permita uma reconsideração radical dos processos de investigação em artes.

  20. Realismo versus globalismo nas relações internacionais

    OpenAIRE

    Vigevani, Tullo; Veiga, João Paulo C; Karina Lilia P. Mariano

    1994-01-01

    Discute-se a influência que os temas econômicos produzem nas bases do poder mundial, tradicionalmente vinculadas aos temas clássicos da estratégia e das relações de poder. Para isso, discutem-se dois pontos de vista teóricos centrais no debate contemporâneo sobre as relações internacionais, o realismo e o globa-lismo, concluindo-se que as divergências existentes não excluem percepões semelhantes no que toca à visão de mundo. As teorias da estabilidade hegemônica e da interdependência complexa...

  1. Estudo de silanos nas linhas de pintura da Caetano Coatings

    OpenAIRE

    2011-01-01

    Tese de mestrado em Química Tecnológica (Química Tecnológica e Qualidade), apresentada à Universidade de Lisboa, através da Faculdade de Ciências, 2011 O principal objectivo deste trabalho foi o controlo da concentração de silício no banho à base de silanos, que integra o pré-tratamento efectuado nas linhas de pintura a pó e pintura líquida da Caetano Coatings com a implementação do procedimento interno ME/LAB/Silanos. O banho à base de silanos é preparado com uma concentração de silício i...

  2. Acuaporinas: proteínas mediadoras del transporte de agua.

    Directory of Open Access Journals (Sweden)

    Julio César Sánchez

    2009-11-01

    Full Text Available Introducción. Todos los organismos vivos están compuestos en su mayoría por agua, siendo ésta fundamental para la homeostasis celular a todo nivel. Por esta razón su transporte a través de las membranas biológicas ha sido siempre un campo de gran interés en la fisiología. La investigación acerca de este tópico se ha incrementado notablemente en los últimos años a partir del descubrimiento de las acuaporinas, las cuales han permitido comprender mejor los mecanismos que la célula utiliza para el control de los flujos de agua a través de la membrana y por ende, la regulación de su osmolaridad interna. Tema general. Hasta el momento se han descrito 11 subtipos de acuaporinas (AQP0-10, las cuales comparten similitudes estructurales y se han relacionado con una gran diversidad de enfermedades en diversos sistemas, desde cataratas hasta diabetes insípida. Objetivo. Se presenta una visión del estado actual del conocimiento acerca de estas importantes proteínas y su relación con diversos procesos fisiológicos y patológicos. Conclusiones. Las acuaporinas son proteínas mediadoras del transporte de agua y las alteraciones en su funcionamiento pueden conducir a una gran diversidad de enfermedades, por lo cual deben ser un objeto prioritario de investigación en el futuro próximo para ayudar a comprender mejor su fisiopatología.

  3. Ensinar e aprender geografia com/nas redes sociais

    Directory of Open Access Journals (Sweden)

    Élida Pasini Tonetto

    2015-01-01

    Full Text Available Este estudo trata de refletir sobre as potencialidades/operacionalidades das práticas pedagógicas da Geografia na apropriação das redes sociais online. Para isso, analisamos possíveis potencialidades oferecidas pelas redes sociais online para a Geografia e como podem ser operacionalizadas nas práticas pedagógicas com as redes sociais online seu ensino e, também, pensar como elas podem contribuir para ensinar e aprender com mais significância Geografia. Os fios teóricos da pesquisa estão tramados no entendimento de aprendizagem online para emaranhar os conceitos de espaço e ciberespaço, transitando por dois locais fundamentais: o da escola e o das redes. A abordagem metodológica é construída nas trilhas das pesquisas pós-críticas em educação, onde o Facebook é o lócus para analisar as novas formas de comunicar que subjetivam os sujeitos e engendram novos formatos de ensinagem. Os resultados apontam diferentes potencialidades e operacionalidades das redes sociais online, mas que não representam apenas o uso da técnica em sala de aula, mas sim como parte da agenda de busca pela construção de processos de aprendizagens significativos em Geografia, através das redes sociais, que representam uma forma contemporânea de comunicar/interagir presente no cotidiano dos alunos.

  4. A busca da transdisciplinaridade nas ciências humanas

    Directory of Open Access Journals (Sweden)

    Aloísio Krohling

    2007-08-01

    Full Text Available Este artigo busca elaborar uma retrospectiva histórica das raízes epistemológicas do pensamento moderno, passando pelo Iluminismo e todas as correntes teóricas, seguidoras da mesma fonte metodológica e epistemológica do SABER INSTRUMENTAL, o que se refletiu nas várias áreas do saber do campo das Ciências Humanas, com o objetivo de mostrar a importância da busca da transdisciplinaridade e da interdisciplinaridade nas Ciências Humanas, com o resgate do paradigma do Múltiplo. A busca da transdisciplinaridade será o fio da meada no sentido de voltar ao MÚLTIPLO heraclitiano e resgatar o “Pantha Rei” das mudanças e contradições da História e da cultura ocidentais. Questiona o atomismo e a fragmentação disciplinar da maioria dos cursos de graduação na área de Ciências Humanas, mormente na Educação, e de modo exacerbado no curso de Direito, com as suas dezenas de disciplinas atomizadas e fragmentadas e sem um fio condutor. É proposta a busca da transdisciplinaridade para o resgate da Metodologia Dialética e da Filosofia da Educação e Filosofia do Direito como as duas grandes alavancas para uma visão e prática holísticas nos Cursos de Educação e Direito bem como na área das Ciências Humanas.

  5. RELATIVE TRACE MINERAL BIOAVAILABILITY

    Directory of Open Access Journals (Sweden)

    Rchard D. Miles

    2006-10-01

    Full Text Available Para determinar a eficiência de utilização de elementos minerais dietéticos, deve-se conhecer a biodisponibilidade relativa de cada elemento de um determinado ingrediente ou de uma ração completa. Análises químicas da dieta ou de um determinado ingrediente não indicam a efetividade biológica de um nutriente. Existem muitos fatores que influenciam a biodisponibilidade dos minerais, especialmente dos minerais-traço, tais como: nível de consumo do mineral, forma química, digestibilidade da dieta, tamanho da partícula, interações com outros minerais e nutrientes, agentes quelantes, inibidores, estado fisiológico do animal, qualidade da água, condições de processamento ao qual ingredientes individuais ou uma dieta completa foram expostos e, é óbvio, a idade e a espécie animal. Quando um mineral-traço é ingerido, sua biodisponibilidade é influenciada por propriedades específicas do mineral da maneira como está incluído na dieta. Por exemplo, sua valência e forma molecular (orgânica versus inorgânica são importantes. Por causa dessas propriedades específicas, o mineral pode formar complexos com outros componentes no intestino, o que pode dificultar ou facilitar a absorção pela mucosa, o transporte ou o metabolismo do mineral no organismo. É bem conhecido que certos minerais em sua forma inorgânica competem com outros minerais por sítios de ligação e por absorção no intestino. O conhecimento sobre a biodisponibilidade dos minerais-traço nos ingredientes e fontes suplementares é importante para a formulação econômica de uma ração para garantir ótimo desempenho animal. A biodisponibilidade deve ser entendida como um valor “estimado” que reflete a absorção e a utilização do mineral sobre condições de um experimento específico e não de uma propriedade inerente e específica de um ingrediente ou suplemento de ração. Com a tecnologia disponível, a determinação da biodisponibilidade dentro de

  6. Water, mineral waters and health.

    Science.gov (United States)

    Petraccia, Luisa; Liberati, Giovanna; Masciullo, Stefano Giuseppe; Grassi, Marcello; Fraioli, Antonio

    2006-06-01

    The authors focus on water resources and the use of mineral waters in human nutrition, especially in the different stages of life, in physical activity and in the presence of some morbid conditions. Mineral water is characterized by its purity at source, its content in minerals, trace elements and other constituents, its conservation and its healing properties recognized by the Ministry of Health after clinical and pharmacological trials. Based on total salt content in grams after evaporation of 1l mineral water dried at 180 degrees C (dry residues), mineral waters can be classified as: waters with a very low mineral content, waters low in mineral content, waters with a medium mineral content, and strongly mineralized waters. Based on ion composition mineral waters can be classified as: bicarbonate waters, sulfate waters, sodium chloride or saltwater, sulfuric waters. Based on biological activity mineral waters can be classified as: diuretic waters, cathartic waters, waters with antiphlogistic properties. Instructions for use, doses, and current regulations are included.

  7. Synthesis and biological evaluation of NAS-21 and NAS-91 analogues as potential inhibitors of the mycobacterial FAS-II dehydratase enzyme Rv0636.

    Science.gov (United States)

    Bhowruth, Veemal; Brown, Alistair K; Besra, Gurdyal S

    2008-07-01

    The identification of potential new anti-tubercular chemotherapeutics is paramount due to the recent emergence of extensively drug-resistant strains of Mycobacterium tuberculosis (XDR-TB). Libraries of NAS-21 and NAS-91 analogues were synthesized and evaluated for their whole-cell activity against Mycobacterium bovis BCG. NAS-21 analogues 1 and 2 demonstrated enhanced whole-cell activity in comparison to the parental compound, and an M. bovis BCG strain overexpressing the dehydratase enzyme Rv0636 was resistant to these analogues. NAS-91 analogues with ortho-modifications gave enhanced whole-cell activity. However, extension with biphenyl modifications compromised the whole-cell activities of both NAS-21 and NAS-91 analogues. Interestingly, both libraries demonstrated in vitro activity against fatty acid synthase II (FAS-II) but not FAS-I in cell-free extracts. In in vitro assays of FAS-II inhibition, NAS-21 analogues 4 and 5 had IC(50) values of 28 and 19 mug ml(-1), respectively, for the control M. bovis strain, and the M. bovis BCG strain overexpressing Rv0636 showed a marked increase in resistance. In contrast, NAS-91 analogues demonstrated moderate in vitro activity, although increased resistance was again observed in FAS-II activity assays with the Rv0636-overexpressing strain. Fatty acid methyl ester (FAME) and mycolic acid methyl ester (MAME) analysis of M. bovis BCG and the Rv0636-overexpressing strain revealed that the effect of the drug was relieved in the overexpressing strain, further implicating and potentially identifying Rv0636 as the target for these known FabZ dehydratase inhibitors. This study has identified candidates for further development as drug therapeutics against the mycobacterial FAS-II dehydratase enzyme.

  8. Strategic Minerals of India

    Directory of Open Access Journals (Sweden)

    D. N. Wadia

    1952-09-01

    Full Text Available The state of disequilibrium in the country's mineral economy may not be harmful in time of international peace, but is a source of double danger to national security in a war emergency, when imports of essential commodities, e.g., petroleum may be jeopardised and the off-take of credit earning exports may be stopped. A healthy economy can be achieved by balancing as near as possible, the surpluses against deficits through building up civilian industrial power of production of substitute for some deficient and sub-marginal commodities and stockpiling of others.

  9. Mineral mining installation

    Energy Technology Data Exchange (ETDEWEB)

    Plevak, L.; Weirich, W.

    1982-04-20

    A longwall mineral mining installation has a longwall conveyor and a plurality of roof support units positioned side-by-side at the goaf side of the conveyor. The hydraulic appliances of the roof support units, such as their hydraulic props, hydraulic advance rams and hydraulic control valves, are supplied with pressurized hydraulic fluid from hydraulic supply lines which run along the goaf side of the conveyor. A plurality of flat, platelike intermediate members are provided at the goaf side of the conveyor. These intermediate members are formed with internal ducts for feeding the hydraulic fluid from the supply lines to the hydraulic appliances of the roof support units.

  10. Reinforcing the mineral layer

    Energy Technology Data Exchange (ETDEWEB)

    Pishchulin, V.V.; Kuntsevich, V.I.; Seryy, A.M.; Shirokov, A.P.

    1980-05-15

    A way of reinforcing the mineral layer includes drilling holes and putting in anchors that are longer than the width of the layer strip being extracted. It also includes shortening the anchors as the strip is mined and reinforcing the remaining part of the anchor in the mouth of the hole. To increase the productivity and safety of the work, the anchors are shortened by cutting them as the strip is mined and are reinforced through wedging. The device for doing this has auxilliary lengthwise grooves in the shaft located along its length at an interval equal to the width of the band being extracted.

  11. Looking Backward: Parting Reflections on Higher Education Reform from NAS's Founding President

    Science.gov (United States)

    Balch, Stephen H.

    2012-01-01

    Twenty-five years at the helm of the National Association of Scholars (NAS) have left the author with vivid memories: of knocks and bruises, peaks of exhilaration and, especially, unforgettable characters. But as for lessons learned, that's a very different story. In this article, the author shares some of the successes that happened in NAS for…

  12. Enhanced tumor growth in the NaS1 sulfate transporter null mouse

    DEFF Research Database (Denmark)

    Dawson, Paul Anthony; Choyce, Allison; Chuang, Christine

    2010-01-01

    to detect collagen. After 14 days, tumor weights were markedly increased (by approximately 12-fold) in Nas1(-/-) mice when compared with Nas1(+/+) mice. Histological analyses of tumors revealed increased (by approximately 2.4-fold) vessel content, as well as markedly reduced collagen and immunoreactivity...

  13. Estatinas nas síndromes coronarianas agudas

    Directory of Open Access Journals (Sweden)

    Alexandre Russo Sposito

    2011-10-01

    Full Text Available As estatinas são o principal recurso disponível para redução do LDL-colesterol. Seu uso contínuo reduz a morbidade e a mortalidade cardiovascular decorrente da doença aterosclerótica. A administração das estatinas demonstrou ser efetiva em estudos clínicos de prevenção primária e secundária em pacientes de baixo e alto risco. O mecanismo presumido de benefício da terapia hipolipemiante na prevenção das complicações da doença aterosclerótica age na redução da deposição de lipoproteínas aterogênicas em áreas vulneráveis da vasculatura. Estudos experimentais com estatinas demonstraram grande variedade de outros efeitos que poderiam estender o benefício clínico além da modificação do perfil lipídico por si só. A terapia com estatinas altera beneficamente componentes importantes do processo aterotrombótico: inflamação, oxidação, coagulação, parâmetros fibrinolíticos, função endotelial, vasorreatividade e função plaquetária. A demonstração dos efeitos não dependentes da redução do colesterol ou pleiotrópicos das estatinas fornece a base teórica para seu possível papel como terapia adjunta das síndromes coronarianas agudas. Análises retrospectivas de uma variedade de estudos indicam potencial benefício das estatinas durante os eventos coronarianos agudos. Estudos clínicos recentes têm abordado essa importante questão em ensaios prospectivos controlados, demonstrando fortes evidências a favor da administração das estatinas como terapia adjunta nas síndromes coronarianas agudas.

  14. Mineral fibres and cancer.

    Science.gov (United States)

    McDonald, J C

    1984-04-01

    A synthesis is presented of the salient findings to date from laboratory and epidemiological research, on the health effects of asbestos and other natural and man-made mineral fibres. Experimental evidence suggests that all mineral fibres are capable of causing fibrosis and malignancy, with chrysotile at least as pathogenic as other fibres. However, penetration, retention and phagocytosis are affected by size and shape and reactivity and durability by physico-chemical properties. Thus it is not surprising that in man the results of exposure vary considerably with fibre type and industrial process. A considerable body of evidence suggests that chrysotile has seldom, if ever, caused peritoneal mesothelioma and that the great majority of pleural mesotheliomas are also attributable to crocidolite or amosite. Without more reliable information on intensity and duration of exposure by fibre type, the epidemiological evidence on this point cannot be wholly conclusive. There are stronger grounds from a limited number of cohort studies for believing that in relation to estimated exposure, the risk of lung cancer has been much higher in textile plants than in fibre production or in the manufacture of friction products, with asbestos-cement plants somewhere in between. The data on man-made fibre production remains equivocal. It is concluded that attempts to regulate asbestos without regard for fibre type, although perhaps adequate for lung cancer and fibrosis, may do little to reduce the risk of mesothelioma. The search for safe fibre substitutes for asbestos will remain difficult until the parameters of pathogenicity are better understood.

  15. Natural Attenuation Software (NAS): A computer program for estimating remediation times of contaminated groundwater

    Science.gov (United States)

    Mendez, E.; Widdowson, M.; Brauner, S.; Chapelle, F.; Casey, C.; ,

    2004-01-01

    This paper describes the development and application of a modeling system called Natural Attenuation Software (NAS). NAS was designed as a screening tool to estimate times of remediation (TORs), associated with monitored natural attenuation (MNA), to lower groundwater contaminant concentrations to regulatory limits. Natural attenuation processes that NAS models include advection, dispersion, sorption, biodegradation, and non-aqueous phase liquid (NAPL) dissolution. This paper discusses the three main interactive components of NAS: 1) estimation of the target source concentration required for a plume extent to contract to regulatory limits, 2) estimation of the time required for NAFL contaminants in the source area to attenuate to a predetermined target source concentration, and 3) estimation of the time required for a plume extent to contract to regulatory limits after source reduction. The model's capability is illustrated by results from a case study at a MNA site, where NAS time of remediation estimates compared well with observed monitoring data over multiple years.

  16. Spectroscopic characterization of manganese minerals

    Science.gov (United States)

    Lakshmi Reddy, S.; Padma Suvarna, K.; Udayabhaska Reddy, G.; Endo, Tamio; Frost, R. L.

    2014-01-01

    Manganese minerals ardenite, alleghanyite and leucopoenicite originated from Madhya Pradesh, India, Nagano prefecture Japan, Sussex Country and Parker Shaft Franklin, Sussex Country, New Jersey respectively are used in the present work. In these minerals manganese is the major constituent and iron if present is in traces only. An EPR study of on all of the above samples confirms the presence of Mn(II) with g around 2.0. Optical absorption spectrum of the mineral alleghanyite indicates that Mn(II) is present in two different octahedral sites and in leucophoenicite Mn(II) is also in octahedral geometry. Ardenite mineral gives only a few Mn(II) bands. NIR results of the minerals ardenite, leucophoenicite and alleghanyite are due to hydroxyl and silicate anions which confirming the formulae of the minerals.

  17. Spectroscopic characterization of manganese minerals.

    Science.gov (United States)

    Lakshmi Reddy, S; Padma Suvarna, K; Udayabhaska Reddy, G; Endo, Tamio; Frost, R L

    2014-01-03

    Manganese minerals ardenite, alleghanyite and leucopoenicite originated from Madhya Pradesh, India, Nagano prefecture Japan, Sussex Country and Parker Shaft Franklin, Sussex Country, New Jersey respectively are used in the present work. In these minerals manganese is the major constituent and iron if present is in traces only. An EPR study of on all of the above samples confirms the presence of Mn(II) with g around 2.0. Optical absorption spectrum of the mineral alleghanyite indicates that Mn(II) is present in two different octahedral sites and in leucophoenicite Mn(II) is also in octahedral geometry. Ardenite mineral gives only a few Mn(II) bands. NIR results of the minerals ardenite, leucophoenicite and alleghanyite are due to hydroxyl and silicate anions which confirming the formulae of the minerals. Copyright © 2013 Elsevier B.V. All rights reserved.

  18. CULTURA DE APRENDIZAGEM E DESEMPENHO NAS TV’S CEARENSES

    Directory of Open Access Journals (Sweden)

    Antonia Silva

    2013-12-01

    Full Text Available Este estudo insere-se no campo da Cultura de Aprendizagem Organizacional. Procura-se analisar a relação entre a Cultura de Aprendizagem (CA e o Desempenho Organizacional (DO em emissoras de TVs cearense, na percepção de seus colaboradores. Trata-se de uma survey descritiva, com uma abordagem quantitativa. Na coleta de dados, utilizou-se o questionário “DLOQ-A” desenvolvido por Yang (2003, contendo 27 itens, respondido por 95 indivíduos. Foi aplicado o método de Mínimos Quadrados Ordinários para analisar a correção entre as duas variáveis: cultura de aprendizagem organizacional e desempenho organizacional. Os resultados indicam que o Desempenho Organizacional nas emissoras está fortemente associado ao desempenho financeiro. Os fatores de Cultura de Aprendizagem que possuem maior capacidade explicativa encontram-se no nível individual (oportunidades para a aprendizagem contínua e no nível organizacional (estímulo a liderança estratégica para a aprendizagem; e desenvolvimento da visão sistêmica da organização. Em síntese, a CA exerce forte influência no desempenho organizacional com o coeficiente de regressão ( de 0,763.

  19. NAS Parallel Benchmark Results 11-96. 1.0

    Science.gov (United States)

    Bailey, David H.; Bailey, David; Chancellor, Marisa K. (Technical Monitor)

    1997-01-01

    The NAS Parallel Benchmarks have been developed at NASA Ames Research Center to study the performance of parallel supercomputers. The eight benchmark problems are specified in a "pencil and paper" fashion. In other words, the complete details of the problem to be solved are given in a technical document, and except for a few restrictions, benchmarkers are free to select the language constructs and implementation techniques best suited for a particular system. These results represent the best results that have been reported to us by the vendors for the specific 3 systems listed. In this report, we present new NPB (Version 1.0) performance results for the following systems: DEC Alpha Server 8400 5/440, Fujitsu VPP Series (VX, VPP300, and VPP700), HP/Convex Exemplar SPP2000, IBM RS/6000 SP P2SC node (120 MHz), NEC SX-4/32, SGI/CRAY T3E, SGI Origin200, and SGI Origin2000. We also report High Performance Fortran (HPF) based NPB results for IBM SP2 Wide Nodes, HP/Convex Exemplar SPP2000, and SGI/CRAY T3D. These results have been submitted by Applied Parallel Research (APR) and Portland Group Inc. (PGI). We also present sustained performance per dollar for Class B LU, SP and BT benchmarks.

  20. AS GUERRAS NAS MATAS DE JACUÍPE

    Directory of Open Access Journals (Sweden)

    Maria Luiza Ferreira de Oliveira

    2015-12-01

    Full Text Available Neste artigo buscamos reconstruir os embates ocorridos nas matas do Jacuipe entre Pernambuco e Alagoas ao longo da década de 1840. Foram muitas batalhas envolvendo aquele território desde a Guerra dos Cabanos até 1850, com a prisão de Vicente de Paula e de Pedro Ivo, e a fundação de duas colônias militares na região, uma em cada província. Interessa-nos entender as disputas e tensões políticas que estavam em pauta, como a imprensa se envolveu nesse debate, assim como desvendar quem eram os guerreiros das matas, como viviam, como lutavam. Além da guerra travada no corpo a corpo, das balas, das trincheiras, das roças e casas queimadas, houve uma outra batalha pela construção de uma memória para esses homens. Pedro Ivo talvez tenha sido o mais disputado personagem: entre herói e bandido, entre líder de uma “regeneração política do paiz” e desertor covarde.

  1. O Estatuto da Pitié nas Obras de Rousseau

    Directory of Open Access Journals (Sweden)

    Marisa Alves Vento

    2015-01-01

    Full Text Available RESUMO:A hipótese apresentada neste texto é a de que a piedade, que Rousseau também denomina “segundo princípio”, encontrado por ele “ao meditar nas primeiras e mais simples operações da alma humana”, não é um princípio antagônico ao amor de si. Pretende-se mostrar como o dualismo radical dos princípios se renderia diante da evidência de uma unidade representada por um duplo movimento: o de fixar-se ou aderir-se em si (amor de si e o de expansão, que seria a expressão da piedade. Desse ponto de vista, o segundo princípio teria um status complementar do amor de si e não opositivo a ele, como algumas interpretações propõem. Entretanto, é uma discussão complexa, uma vez que nela estão implicadas as controvérsias entre os intérpretes de Rousseau em relação à possível divergência da noção de piedade, no Segundo Discurso, no Emílio e no Ensaio sobre a Origem das Línguas, além das discussões em torno da datação do Ensaio.

  2. Update on the NAS-NRC Twin Registry.

    Science.gov (United States)

    Page, William F

    2006-12-01

    The National Academy of Sciences-National Research Council (NAS-NRC) Twin Registry is one of the oldest, national population-based twin registries in the United States. It consists of 15,924 white male twin pairs born in the years 1917 to 1927 (inclusive), both of whom served in the armed forces, mostly during World War II. This article updates activity in this registry since the earlier 2002 article in Twin Research. The results of clinically based studies on dementia, Parkinson's disease, age-related macular degeneration, and primary osteoarthritis were published, as well as articles based on previously collected questionnaire data on chronic fatigue syndrome, functional limitations, and healthy aging. In addition, risk factor studies are being planned to merge clinical data with earlier collected risk factor data from questionnaires. Examination data from the subset of National Heart, Lung, and Blood Institute (NHLBI) twins resulted in a number of articles, including the relationship of endogenous sex hormones to coronary heart disease and morphological changes in aging brain structures. The NEO Five-Factor Personality Inventory (a paper-and-pencil self-administered questionnaire) has been fielded for the first time. A push to consolidate the various data holdings of the registry is being made.

  3. Radioactivity of phosphate mineral products

    OpenAIRE

    Mitrović Branislava; Vitorović Gordana; Stojanović Mirjana; Vitorović Duško

    2011-01-01

    The phosphate industry is one of the biggest polluters of the environment with uranium. Different products are derived after processing phosphoric ore, such as mineral and phosphate fertilizers and phosphate mineral supplements (dicalcium-and monocalcium phosphate) for animal feeding. Phosphate mineral additives used in animal food may contain a high activity of uranium. Research in this study should provide an answer to the extent in which phosphate minera...

  4. Protein- mediated enamel mineralization

    Science.gov (United States)

    Moradian-Oldak, Janet

    2012-01-01

    Enamel is a hard nanocomposite bioceramic with significant resilience that protects the mammalian tooth from external physical and chemical damages. The remarkable mechanical properties of enamel are associated with its hierarchical structural organization and its thorough connection with underlying dentin. This dynamic mineralizing system offers scientists a wealth of information that allows the study of basic principals of organic matrix-mediated biomineralization and can potentially be utilized in the fields of material science and engineering for development and design of biomimetic materials. This chapter will provide a brief overview of enamel hierarchical structure and properties as well as the process and stages of amelogenesis. Particular emphasis is given to current knowledge of extracellular matrix protein and proteinases, and the structural chemistry of the matrix components and their putative functions. The chapter will conclude by discussing the potential of enamel for regrowth. PMID:22652761

  5. Mineralization by nanobacteria

    Science.gov (United States)

    Kajander, E. Olavi; Bjorklund, Michael; Ciftcioglu, Neva

    1998-07-01

    Nanobacteria are the smallest cell-walled bacteria, only recently discovered in human and cow blood and in commercial cell culture serum. In this study, we identified with energy-dispersive x-ray microanalysis and chemical analysis that all growth phases of nanobacteria produce biogenic apatite on their cell envelope. Fourier transform IR spectroscopy revealed the mineral as carbonate apatite. Previous models for stone formation have lead to a hypothesis that an elevated pH due to urease and/or alkaline phosphatase activity are important lithogenic factors. Our results indicate that carbonate apatite can be formed without these factors at pH 7.4 at physiological phosphate and calcium concentrations. Due to their specific macromolecules, nanobacteria can produce apatite very efficiency in media mimicking tissue fluids and glomerular filtrate and rapidly mineralizing most of available calcium and phosphate. This can be also monitored by (superscript 85)Sr incorporation and provides a unique model for in vitro studies on calcification. Recently, bacteria have been implicated in the formation of carbonate (hydroxy)fluorapatite in marine sediments. Apatite grains are found so commonly in sedimentary rocks that apatite is omitted in naming the stone. To prove that apatite and other minerals are formed by bacteria would implicate that the bacteria could be observed and their actions followed in stones. We have started to approach this in two ways. Firstly, by the use of sensitive methods for detecting specific bacterial components, like antigens, muramic acid and nucleic acids, that allow for detecting the presence of bacteria and, secondly, by follow-up of volatile bacterial metabolites observed by continuous monitoring with ion mobility spectrometry, IMCELL, working like an artificial, educatable smelling nose. The latter method might allow for remote real time detection of bacterial metabolism, a signature of life, in rocks via fractures of drillholes with or without

  6. Photocurrent and Photoluminescence Investigations of GaInNAs and GaInNAs(Sb Quantum Wells Grown by Molecular Beam Epitaxy

    Directory of Open Access Journals (Sweden)

    S. B. Bouzid

    2005-01-01

    Full Text Available We have investigated photocurrent (PC and photoluminescence (PL in sequentially grown GaInNAs/GaAs and GaInNAs(Sb/GaAsSbN quantum wells. Photocurrent transitions are analyzed by theoretical calculations using envelope function formalism taking into account the strain effect and the strong coupling between nitrogen localized state and the GaInAs band gap. The results are consistent with a type I band alignment and a conduction band offset ratio of about 80 %. Additionally, our results suggest an increase of the electron effective mass by as much as 0.035 m0 resulting from the flattening of the conduction band under nitrogen effect. The temperature evolution of the PL peak energy and the integrated PL intensity of GaInNAsSb QW show evidence of strong localization of carriers. Both, the high delocalization temperature, in the 230 K range and the strong shift between the PC and PL spectra of GaInNAsSb QW, indicate the presence of deeper localized states as compared to that in the GaInNAs QW.

  7. Estruturas de poder nas redes de financiamento político nas eleições de 2010 no Brasil

    Directory of Open Access Journals (Sweden)

    Rodrigo Rossi Horochovski

    2016-04-01

    Full Text Available Resumo Este artigo analisa os 299.968 relacionamentos estabelecidos entre os 251.665 doadores e/ou receptores de recursos financeiros legais abrangidos pelas prestações de contas das campanhas nas eleições de 2010 no Brasil, englobando todos os candidatos e partidos. Aplica-se aos dados do Tribunal Superior Eleitoral (TSE a metodologia de análise de redes sociais e tratamentos estatísticos complementares para a exploração da topologia das sub-redes (componentes e dos cálculos de centralidade dos atores – candidatos, agentes partidários e financiadores privados. Os resultados expõem a alta conectividade e assimetria da rede de financiamento eleitoral no Brasil e mostram que o posicionamento dos atores em estratos da rede é determinante para o desempenho tanto de candidatos quanto de financiadores, revelando, de uma forma inédita, uma elite no poder político-eleitoral brasileiro.

  8. Nas brumas do HGPE: a imagem partidária nas campanhas presidenciais brasileiras (1989 a 2010

    Directory of Open Access Journals (Sweden)

    Marcia Ribeiro Dias

    2013-06-01

    Full Text Available Este artigo tem como ponto de partida a análise de alguns dados coletados em estudos anteriores acerca da imagem partidária construída pelos partidos políticos brasileiros em campanhas eleitorais, incorporando dados e informações relativos às eleições presidenciais de 2010. Entretanto, não se trata de apenas adicionar novos dados a uma estrutura de análise prévia. O objetivo é construir um diagnóstico da imagem partidária que vem sendo projetada em campanhas presidenciais no Brasil, entre 1989 e 2010. A discussão dos dados quantitativos é seguida por uma análise qualitativa direcionada especificamente à campanha de 2010. O objetivo é analisar os aspectos mais relevantes do papel dos partidos políticos nas campanhas dos dois principais candidatos em disputa: Dilma Rousseff (PT e José Serra (PSDB. A discussão sobre o papel do PSDB na candidatura de José Serra centrou-se no discurso antipartidário empreendido pela campanha televisiva. A discussão sobre o papel do PT na candidatura de Dilma Rousseff centrou-se na participação do Presidente Lula em sua campanha na televisão, analisando o papel da liderança na dinâmica eleitoral contemporânea.

  9. Effects of zinc acexamate (NAS-501) on superoxide radicals and lipid peroxidation of rat gastric mucosa.

    Science.gov (United States)

    Tsutsui, Y; Nakamura, Y; Yamaguchi, S; Kawanaka, N; Sato, M

    1999-04-01

    Zinc acexamate (NAS-501), an anti-ulcer agent, has been reported to prevent various acute experimental gastric mucosal lesions and duodenal ulcers in rats. In order to clarify the mechanisms by which NAS-501 exhibits the anti-ulcer effects, we investigated the anti-oxidative effects of NAS-501 in vitro and in vivo. NAS-501 significantly reduced the superoxide radical-dependent chemiluminescence, generated by hypoxanthine-xanthine oxidase, rat neutrophils and guinea-pig macrophages in vitro. These in vitro effects were also confirmed by electron spin resonance using a 5, 5-dimethyl-1-pyrroline-N-oxide spin-trapping method. In addition, NAS-501 significantly inhibited lipid peroxidation induced by increasing concentrations of Fe2+/ascorbate in rat gastric mucosal homogenate in vitro. Oral administration of NAS-501 (30 mg/kg) significantly inhibited production of thiobarbituric acid-reactive substance in rat gastric mucosa following per os instillation of 60% ethanol in 150 mmol/l HCl in vivo. These results suggest that NAS-501 exhibits the preventive effect from acute gastric mucosal lesions by the anti-oxidative activity.

  10. [Study on the Application of NAS-Based Algorithm in the NIR Model Optimization].

    Science.gov (United States)

    Geng, Ying; Xiang, Bing-ren; He, Lan

    2015-10-01

    In this paper, net analysis signal (NAS)-based concept was introduced to the analysis of multi-component Ginkgo biloba leaf extracts. NAS algorithm was utilized for the preprocessing of spectra, and NAS-based two-dimensional correlation analysis was used for the optimization of NIR model building. Simultaneous quantitative models for three flavonol aglycones: quercetin, keampferol and isorhamnetin were established respectively. The NAS vectors calculated using two algorithms introduced from Lorber and Goicoechea and Olivieri (HLA/GO) were applied in the development of calibration models, the reconstructed spectra were used as input of PLS modeling. For the first time, NAS-based two-dimensional correlation spectroscopy was used for wave number selection. The regions appeared in the main diagonal were selected as useful regions for model building. The results implied that two NAS-based preprocessing methods were successfully used for the analysis of quercetin, keampferol and isorhamnetin with a decrease of factor number and an improvement of model robustness. NAS-based algorithm was proven to be a useful tool for the preprocessing of spectra and for optimization of model calibration. The above research showed a practical application value for the NIRS in the analysis of complex multi-component petrochemical medicine with unknown interference.

  11. Imagens e representações de masculinidades nas telenovelas

    Directory of Open Access Journals (Sweden)

    Cristina Donza Cancela

    2013-12-01

    Full Text Available Inicialmente pensadas como um produto para as mulheres, as telenovelas foram modificando-se ao longo dos anos e alcançaram como público-consumidor os homens. Um aspecto dessa mudança pode ser percebido nos merchandisings (visual e social. Assim, os folhetins eletrônicos contribuem para a visualização, construção, manutenção e ressignificação do “ser homem” e das masculinidades na contemporaneidade, desempenhando importante papel como fonte de conhecimento para a maioria da população, acionando imagens e experiências. Para discutir a relação entre telenovela e masculinidade, realizou-se entrevistas com cinco mulheres e onze homens, cuja faixa etária estava compreendida entre 18 e 30 anos. O objetivo da pesquisa era perceber a relação que homens e mulheres de Belém do Pará têm com os folhetins eletrônicos; bem como, quais as representações do masculino que eles/elas identificam nas telenovelas da atualidade. Ver-se-á que é percebida uma mudança nos tipos masculinos que são veiculados hodienarmente; contudo, o perfil recorrentemente identificado ainda é o heterossexual, marcado pela virilidade, a despeito de novos personagens relacionados ao modo de ser metrossexual e à homossexualidade ganharem cada vez mais espaço e serem lembrados pelos/as interlocutores/as.

  12. O Impacto Financeiro das Auditorias da Qualidade nas empresas Portuguesas

    Directory of Open Access Journals (Sweden)

    Isabel Cristina Passos Batista

    2015-12-01

    Full Text Available O presente trabalho aborda como temática principal as implicações financeiras que as empresas portuguesas têm com a implementação e posterior certificação do Sistema da Qualidade e respetivas Auditorias da Qualidade. A revisão da literatura demonstra que as empresas não publicam os resultados financeiros sobre a temática em questão, tornando-se necessário adquirir informação através de um questionário. Foram enviados cerca de 126 questionários. A nossa amostra é no entanto de 32 questionários validados. Pode-se concluir que os 5 principais benefícios gerais, ou benefícios financeiros indiretos para as empresas portuguesas foram, respetivamente: melhoria da organização interna; melhoria da imagem da empresa; aumento da satisfação dos clientes; melhoria contínua no atendimento ao cliente; melhoria da posição competitiva. Em termos de benefícios financeiros diretos os 3 principais benefícios obtidos pelas empresas foram: Aumento do volume de negócios; Desempenho (redução de custos;Aumento da produtividade da empresa. Espera-se assim dar um contributo para o conhecimento do impacto, nomeadamente, financeiro dos Sistemas de Gestão da Qualidade e respetivas auditorias nas empresas portuguesas.

  13. A Inovação nas Empresas de Caruaru

    Directory of Open Access Journals (Sweden)

    Lucas Felipe Pereira Torres

    2014-12-01

    Full Text Available A discussão em torno da inovação é tema de grande relevância na atualidade. Trata-se de um processo que, ao mesmo tempo, é sistemático, composto de riscos e desafios assumidos na busca por resultados positivos, seja pelo investimento em pesquisa, desenvolvimento e capacitação dos profissionais, pela redução de gastos com produção ou processos, aumento do faturamento ou alcance de um novo mercado. Desse modo, este artigo tem como objetivo geral colher evidências empíricas da percepção dos empreendedores do município de Caruaru – PE sobre inovação. A metodologia utilizada é classificada como survey exploratória. Os dados foram coletados mediante questionários fechados enviados via e-mail aos empreendedores de Caruaru-PE. Ao fim da pesquisa, processaram-se a codificação e a tabulação dos dados, seguida pela descrição e análise dos mesmos. A análise dos dados foi feita através do programa Microsoft Excel 2010, onde após o tratamento dos dados, obtiveram-se os gráficos com as variáveis pesquisadas. Como principais resultados da pesquisa destacam-se a identificação do foco e das características da inovação nas empresas de Caruaru-PE, bem como o perfil do empreendedor inovador caruaruense.

  14. 77 FR 56273 - Conflict Minerals

    Science.gov (United States)

    2012-09-12

    ... opportunity to improve a company's existing risk management and supply chain management, stimulating... Minerals Already in the Supply Chain a. Proposed Rules b. Comments on the Proposed Rules c. Final Rule 6... Content and Supply Chain Due Diligence 1. Content of the Conflict Minerals Report a. Proposed Rules...

  15. Minerals From the Marine Environment

    Science.gov (United States)

    Cruickshank, Michael J.

    The current interest in minerals centering on, among other things, potential shortages, long-term needs, and deep seabed nodules, accentuates the usefulness and timeliness of this little book authored by a former chairman of the British National Environmental Research Council.In less than 100 pages, the author puts into perspective the potential for producing minerals from offshore areas of the world. After introducing the reader to the ocean environment and the extraordinary variety of the nature of the seabed, the author describes in some detail the variety of minerals found there. This is done in seven separate chapters entitled ‘Bulk and Non-Metallic Minerals From the Seas’ ‘Metals From the Shallow Seas’ ‘Metals From the Deep Oceans’ ‘Minerals From Solution’ ‘Oil and Gas from the Shallow Seas’ ‘Oil and Gas From Deep Waters’ and ‘Coal Beneath the Sea.’ The remaining chapters give a brief regional review of marine minerals distribution for eight areas of significant socioeconomic structure, and a short recapitulation of special problems of mineral recovery in the marine environment including such matters as the effect of water motion on mineral processing and of international law on investments. Glossaries of geological periods and technical terms, a short list of references, and an index complete the work.

  16. Mineral Atlas of the World

    Institute of Scientific and Technical Information of China (English)

    2004-01-01

    In 1997 the mineral resources of Europe and neighbouring countries were presented as a printed map and a book of exhaustive information and references. This was the first published map inventory of mineral deposits from all parts of the formerly politically divided Europe (East and West), measured and evaluated according to identical geological and mining standards.

  17. A Mineral Processing Field Course

    Science.gov (United States)

    Carmody, Maurice

    2014-01-01

    This article describes a field course in Cornwall looking at mineral processing with the focus on the chemistry involved. The course was split into two parts. The first looked at tin mining based around Penzance. This involved visiting mines, hunting for mineral samples, carrying out a stream survey and visiting the Camborne School of Mines…

  18. Geotechnical Description of Mineral Deposits

    Directory of Open Access Journals (Sweden)

    Sasvári Tibor

    1996-06-01

    Full Text Available Performing various mineral deposits extraction methods requires thorough knowledge of the rock masses` geomechanical parameters. In the geotechnical description of mineral deposits there is proposed a methodical approarch at the collection, registration, and evaluation of rock masses` geological properties for geotechnics being applied within the mining industry.

  19. Plant macro- and micronutrient minerals

    Science.gov (United States)

    All plants must obtain a number of inorganic mineral elements from their environment to ensure successful growth and development of both vegetative and reproductive tissues. A total of fourteen mineral nutrients are considered to be essential. Several other elements have been shown to have beneficia...

  20. 75 FR 80947 - Conflict Minerals

    Science.gov (United States)

    2010-12-23

    ... violence in the eastern Democratic Republic of the Congo, particularly sexual- and gender-based violence... conflict free,'' the facilities used to process the conflict minerals, the country of origin of the conflict minerals, and ``the efforts to determine the mine or location of origin with the greatest...

  1. Estabilidad de emulsiones preparadas con proteínas de sueros de soja

    OpenAIRE

    Jorge Wagner; Pablo Sobral

    2011-01-01

    Por precipitación con acetona en frio, se obtuvieron muestras de proteínas aisladas de dos sueros de soja, el suero SS proveniente de la obtención de aislados de soja y el suero de tofu ST. A partir del SS y del mismo suero previamente liofilizado y calentado (SSLC) se obtuvieron las proteínas denominadas PSS y PSSLC, respectivamente; a partir de ST se preparó la muestra PST. El objetivo del trabajo fue analizar la estabilidad de emulsiones o/w preparadas con las proteínas de sueros de soja e...

  2. Invalidez por dor nas costas entre segurados da Previdência Social do Brasil

    OpenAIRE

    Ney Meziat Filho; Gulnar Azevedo e Silva

    2011-01-01

    OBJETIVO: Descrever as aposentadorias por invalidez decorrente de dor nas costas. MÉTODOS: Estudo descritivo com dados do Sistema Único de Informações de Benefícios e dos Anuários Estatísticos da Previdência Social em 2007. A taxa de incidência de dor nas costas como causa das aposentadorias por invalidez foi calculada segundo as variáveis idade e sexo, nos estados. Os dias de trabalho perdidos por invalidez decorrente de dor nas costas foram calculados segundo atividade profissional. RESULTA...

  3. Propiedades de geles de concentrado de proteínas de lactosuero, miel y harina

    OpenAIRE

    Yamul, Diego Karim

    2008-01-01

    La capacidad de las proteínas de suero de leche para formar geles por calentamiento es una de las principales propiedades funcionales que se esperan de estas proteínas. El proceso de gelificación en sistemas de alimentos se lleva a cabo normalmente en varias etapas incluyendo los cambios conformacionales de las moléculas de proteína, su agregación, y la formación de una red de gel tridimensional por la interacción de agregados. En la gelificación termotrópica de las proteínas globulares, la d...

  4. ANÁLISIS GENÓMICO-FUNCIONAL DE PROTEÍNAS CON DOMINIOS TIR EN YUCA

    OpenAIRE

    VERÓNICA ROMÁN REYNA; CAMILO LÓPEZ

    2012-01-01

    Dentro de las proteínas implicadas en inmunidad de plantas y animales se encuentran aquellas que poseen un dominio TIR (Toll Interleukin Receptor). El objetivo de este trabajo fue realizar un análisis genómico global de las proteínas que presentan un dominio TIR en yuca y discernir su posible función en la resistencia a la bacteriosis vascular. En el proteoma de yuca se logró identificar 46 proteínas con dominios TIR, los cuales fueron divididos en cuatro categorías según la presencia o no de...

  5. 78 FR 46497 - Amendment of Class D and E Airspace, and Establishment of Class E Airspace; Oceana NAS, VA

    Science.gov (United States)

    2013-08-01

    ... Establishment of Class E Airspace; Oceana NAS, VA AGENCY: Federal Aviation Administration (FAA), DOT. ACTION... establishes Class E surface airspace at Oceana Naval Air Station, (NAS), VA, due to the Air Traffic Control Tower at Oceana NAS (Apollo Soucek Field) now operating on a part time basis. This action enhances...

  6. 75 FR 28610 - Draft EPA's Reanalysis of Key Issues Related to Dioxin Toxicity and Response to NAS Comments

    Science.gov (United States)

    2010-05-21

    ... AGENCY Draft EPA's Reanalysis of Key Issues Related to Dioxin Toxicity and Response to NAS Comments... Issues Related to Dioxin Toxicity and Response to NAS Comments'' (EPA/600/R- 10/038A). This draft report responds to the key recommendations and comments included in the National Academy of Sciences (NAS)...

  7. 78 FR 21084 - Proposed Amendment of Class D and E Airspace, and Establishment of Class E Airspace; Oceana NAS, VA

    Science.gov (United States)

    2013-04-09

    ... Establishment of Class E Airspace; Oceana NAS, VA AGENCY: Federal Aviation Administration (FAA), DOT. ACTION... operating hours, and establish Class E Airspace at Oceana Naval Air Station, (NAS), VA, due to the Air Traffic Control Tower at Oceana NAS (Apollo Soucek Field) operating on a part time basis. This...

  8. 75 FR 35800 - Draft EPA's Reanalysis of Key Issues Related to Dioxin Toxicity and Response to NAS Comments

    Science.gov (United States)

    2010-06-23

    ... AGENCY Draft EPA's Reanalysis of Key Issues Related to Dioxin Toxicity and Response to NAS Comments... Dioxin Toxicity and Response to NAS Comments'' (EPA/600/R-10/038A) for independent external review, and... Sciences (NAS) 2006 report. In addition, it includes new analyses on potential human effects that...

  9. 30 CFR 57.5070 - Miner training.

    Science.gov (United States)

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Miner training. 57.5070 Section 57.5070 Mineral... Agents, and Diesel Particulate Matter Diesel Particulate Matter-Underground Only § 57.5070 Miner training. (a) Mine operators must provide annual training to all miners at a mine covered by this part who...

  10. Mineral mining installation

    Energy Technology Data Exchange (ETDEWEB)

    Becker, K.; Rosenberg, H.; Weirich, W.

    1981-12-29

    A longwall mineral mining installation has a conveyor and a plurality of roof support units positioned side-by-side on the goaf side of the conveyor. Each roof support unit has a roof shield having an advanceable shield extension. Each unit has a first hydraulic ram for extending its shield extension, and a second hydraulic ram for advancing the conveyor. The extension of each first ram is controlled in dependence upon the retraction of one of the second rams (Either the second ram of the same unit or that of an adjacent unit). This control is effected by controlling the supply of pressurized hydraulic fluid to the first rams. In one embodiment this is carried out by a control valve which has a spring-loaded plunger which engages with a series of equispaced cams on the movable cylinder of the associated second ram. In another embodiment, the piston rods of the rams are provided with series of equispaced magnets. The cylinders of the rams are provided with sensors, which sense the magnets and generate control signals. A control box is provided to direct the control signals to control valves associated with the rams, so that the first rams are extended by the same distance as that through which the second rams are retracted.

  11. Mineral mining installation

    Energy Technology Data Exchange (ETDEWEB)

    Weirich, W.

    1984-01-24

    A longwall mineral mining installation has a conveyor and a plurality of roof support units positioned side-by-side on the goaf side of the conveyor. Each roof support unit has a roof shield having an advanceable shield extension. Each unit has a first hydraulic ram for extending its shield extension, and a second hydraulic ram for advancing the conveyor. The extension of each first ram is controlled in dependence upon the retraction of one of the second rams (either the second ram of the same unit or that of an adjacent unit). This control is effected by controlling the supply of pressurized hydraulic fluid to the first rams. In one embodiment this is carried out by a control valve which has a springloaded plunger which engages with a series of equispaced cams on the movable cylinder of the associated second ram. In another embodiment, the piston rods of the rams are provided with series of equispaced magnets. The cylinders of the rams are provided with sensors, which sense the magnets and generate control signals. A control box is provided to direct the control signals to control valves associated with the rams, so that the first rams are extended by the same distance as that through which the second rams are retracted.

  12. Growth of Crotalaria juncea L. supplied with mineral nitrogen

    Directory of Open Access Journals (Sweden)

    Elenira Henrique Miranda Mendonça

    2005-03-01

    Full Text Available Plants of Crotalaria juncea inoculated with Rhizobium were treated with nutrient solution containing 10 or 20mg of either N/NO3 or N/NH4.plant-1.week-1 . The control plants received nutrient solution without N. An investigation was conducted on the effect of these sources of N on growth and nitrogen fixation of plants with 30, 60 and 90 days after sowing (DAS. Those that received mineral N presented higher growth than -N plants, but the presence of nodules occurred in all the treatments. Plants treated with NH4 presented higher N content until 60 days. The highest concentrations of leghemoglobin and protein in nodules were found at 30 DAS and there was no difference in leghemoglobin content between treatments for any age and in protein from 60 DAS. Nitrogenase activity did not vary from 60 to 90 days, with the exception of plants that received 20mg N/NO3, where it was higher at 60 daysPlantas de Crotalaria juncea inoculadas com Rhizobium foram tratadas com solução nutritiva contendo 10 ou 20mg de N/NO3 ou N/NH4.planta-1 .semana-1. As plantas controle receberam solução nutritiva sem N. Foi verificado o efeito destas fontes de N no crescimento e fixação de nitrogênio em plantas com 30, 60 e 90 dias após a semeadura (DAS. Aquelas que receberam N mineral apresentaram maior crescimento que plantas -N, mas a presença de nódulos ocorreu em todos os tratamentos. Plantas tratadas com NH4 apresentaram maior conteúdo de N até os 60 dias. As maiores concentrações de leghemoglobina e proteínas em nódulos foram verificadas aos 30 DAS e não houve diferença no conteúdo de leghemoglobina entre os tratamentos, em nenhuma das idades e em proteínas a partir de 60 DAS. A atividade da nitrogenase não variou dos 60 aos 90 dias, com exceção de plantas que receberam 20mg N/NO3, nas quais esta foi maior aos 60 dias.

  13. Composition control of quinary GaInNAsSb alloy grown by molecular beam epitaxy

    Energy Technology Data Exchange (ETDEWEB)

    Miyashita, Naoya; Ahsan, Nazmul; Okada, Yoshitaka [Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904 (Japan); Islam, Muhammad Monirul [Institute of Applied Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573 (Japan)

    2013-11-15

    In order to precisely control the composition of quinary GaInNAsSb alloy, we investigated the incorporation behavior of constituent atoms during atomic hydrogen-assisted molecular beam epitaxial growth. The nitrogen (N) composition, in comparison of GaNAs and GaNAsSb, increased by the supply of antimony (Sb). However, addition of indium (In) decreases the N composition during Sb mediated growth of GaInNAsSb, which enables obtaining the same N composition when an adequate In composition is chosen. It was revealed that Sb incorporation was increased when (i) In composition decreased, (ii) Sb flux increased, (iii) growth temperature decreased, and (iv) growth rate increased. These results are thought to be related to the effect of competitive role among strain, coverage, desorption, and segregation. (copyright 2013 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

  14. Algoritmos evolutivos para predição de estruturas de proteínas

    OpenAIRE

    Telma Woerle de Lima

    2006-01-01

    A Determinação da Estrutura tridimensional de Proteínas (DEP) a partir da sua seqüência de aminoácidos é importante para a engenharia de proteínas e o desenvolvimento de novos fármacos. Uma alternativa para este problema tem sido a aplicação de técnicas de computação evolutiva. As abordagens utilizando Algoritmos Evolutivos (AEs) tem obtido resultados relevantes, porém estão restritas a pequenas proteínas, com dezenas de aminoácidos e a algumas classes de proteínas. Este trabalho propõe a inv...

  15. Boekbespreking van C. Nas, ‘EQUIPping’ delinquent male adolescents to think pro-socially

    NARCIS (Netherlands)

    Veenstra, René

    2006-01-01

    Bespreking (review) van: Coralijn Nas, ‘EQUIPping’ delinquent male adolescents to think pro-socially (diss. Utrecht), Faculteit Sociale Wetenschappen, Universiteit Utrecht, 2005, 107 blz., ISBN 90-8559-054-x.

  16. Market-Based Mechanisms for Efficient Allocation of NAS Resources Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Both FAA and NASA research has highlighted the need for efficient and equitable allocation of NAS resources and increased operational flexibility. In particular,...

  17. OLICIES AND PRACTICES FOR IMPLEMENTATION OF IFRS AND NAS IN THE REPUBLIC OF MOLDOVA

    National Research Council Canada - National Science Library

    Lica ERHAN; Marian SOCOLIUC; Svetlana MIHAILA; Veronica GROSU

    2015-01-01

    .... A major step for the Republic of Moldova was the implementation of IFRS, which has become mandatory for all public interest entities from 1 January 2012 and the adoption of new NAS in accordance...

  18. Environmental Assessment for the management of the Greenbelt Area at Naval Air Station (NAS)

    Data.gov (United States)

    US Fish and Wildlife Service, Department of the Interior — Approximately 3,595 acres of land around Naval Air Station (NAS) Fallon, known as the greenbelt, are out leased to local farmers for agricultural production. In...

  19. A EPÊNTESE DO FOMEMA “I” NAS FLEXÕES VERBAIS.

    OpenAIRE

    2012-01-01

    Entendemos por epêntese o metaplasmo por acréscimo que consisteem inserir-se fonema no meio da palavra.Exemplo: stella>estrela.Nas flexões verbais, especificamente, a inserção do fonema “i”em verbos terminados em EAR ocorre quando, nas suas formas rizotônicas,(acentuação tônica sobre a raiz do vocábulo) transforma-se o “e” doradical em “ei”:Isto ocorre nas três pessoas do singular e na terceira pessoa doplural do presente do indicativo e do subjuntivo; fenômeno idêntico verifica-se nas for...

  20. Shadow Mode Assessment Using Realistic Technologies for the National Airspace (SMART NAS)

    Science.gov (United States)

    Kopardekar, Parimal H.

    2014-01-01

    Develop a simulation and modeling capability that includes: (a) Assessment of multiple parallel universes, (b) Accepts data feeds, (c) Allows for live virtual constructive distribute environment, (d) Enables integrated examinations of concepts, algorithms, technologies and National Airspace System (NAS) architectures.

  1. A reserva de vagas para negros nas universidade brasileiras

    Directory of Open Access Journals (Sweden)

    Yvonne Maggie

    2004-04-01

    Full Text Available O GOVERNO do Estado do Rio de Janeiro, depois de votada por aclamação na Assembléia Legislativa, adotou em 2001 uma política de cotas para "negros e pardos" nas suas instituições de ensino superior. Na trilha da preparação da III Conferência Mundial das Nações Unidas de Combate ao Racismo, Discriminação Racial, Xenofobia e Intolerância Correlata que teve lugar em Durban, na África do Sul, em 2001, esta política e aquelas decretadas pelo governo federal não foram objeto de um amplo debate público. Este debate começa agora fracamente depois dos fatos consumados. Os autores analisam os caminhos dessa mudança de rumo radical do paradigma racial brasileiro através da descrição de cartas de leitores ao jornal O Globo. Estes leitores, os nossos "nativos", são ponto de partida para avaliar as dificuldades e as conseqüências que uma tal política de Estado impõe à população brasileira, especialmente àqueles que, longe do poder das elites, serão obrigados a se definir "racialmente" para serem tratados desigualmente na luta por vagas no serviço público e na universidade.IN 2001, a law obliging the institutions of higher learning of the State of Rio de Janeiro to reserve 40% of all places for "blacks and browns" was passed by acclamation and without debate. Along the path of the preparations for the III United Nations World Conference against Racism, which was held in Durban in 2001, this policy and other similar ones decreed by the federal government came into being without ample public debate. Ex post facto this debate is now only beginning. The authors analyze the sequence of this radical change in Brazil's racial paradigm through a description of readers' letters published in the newspaper O Globo. These readers, our "natives" lead us to evaluate the difficulties and the consequences that this government policy imposes on the Brazilian population, especially those poorer citizens, who, far from the power elites, will

  2. A LITISPENDÊNCIA NAS AÇÕES COLETIVAS

    Directory of Open Access Journals (Sweden)

    Maria Carolina Florentino Lascala

    2010-12-01

    Full Text Available Os interesses transindividuais reclamam a adaptação das regras do tradicional processo civil, pensado e elaborado para tutelar o interesse particular. Neste artigo, será abordada a litispendência nas ações coletivas, suas características, efeitos e particularidades. Litispendência  é  a repetição de ação em curso. Em relação às ações coletivas, este fenômeno processual pode existir mesmo que a segunda ação seja proposta por  autor diverso. Isso porque, no pólo ativo da  demanda coletiva, a parte está em juízo defendendo interesse alheio, de grupo determinável ou indeterminável. Então, ainda que haja legitimadosdiversos no pólo ativo, buscando o mesmo interesse coletivo, na verdade, ambos os autores estão em juízo representando a mesma coletividade. É que,  no campo da legitimação extraordinária, ainda que a ação seja proposta por autor diferente, o titular do direito material estará igualmente representado,  havendo, portanto, repetição da causa em juízo. Com isso, pode-se afirmar haver litispendência dessas ações. Apesar de haver litispendência, o intuito do processo coletivo é a busca da verdade real e, por isso, seria prejudicial a extinção de uma das demandas. Portanto,  o que se quer provar é que o efeito típico da conexão pode ser aqui aplicado, ou seja, o efeito de reunião das ações para julgamento conjunto. Esta é a solução que mais atende ao resultado útil do processo na tutela coletiva.

  3. O EFEITO CHAMARIZ NAS DECISÕES DE INVESTIMENTO

    Directory of Open Access Journals (Sweden)

    César Augusto Tibúrcio Silva

    2012-03-01

    Full Text Available O estudo das fi nanças comportamentais vem ganhando destaque e sendo objeto de diversos trabalhos acadêmicos. Muitos conceitos tradicionais de economia, sobre o homem econômico, têm sido questionados, ao se considerarem aspectos observados na prática. Principalmente, a partir dos modernos estudos de economia comportamental, aponta-se que o homem se comporta de maneira enviesada e irracional, para tomar suas decisões. É infl uenciado por detalhes que podem levá-lo a fazer escolhas menos vantajosas, relacionadas ao seu dinheiro, e nem mesmo se dar conta disso. O efeito chamariz refere-se à infl uência que um item, a ser escolhido, exerce sobre aqueles que farão uma escolha, inclusive levando- os a tomar uma decisão que, anteriormente, era duvidosa, ou até mesmo a mudar uma escolha anterior. Esse efeito mostra como o homem cria falsas bases de comparação, para simplifi car um ambiente de escolha entre opções. O trabalho faz uma pesquisa sobre uma decisão de investimento, em que há duas situações, com a presença ou não de um chamariz, algo que pode infl uenciar a decisão fi nal dos investidores. Participaram da pesquisa 386 alunos de graduação do curso de Ciências Contábeis, de cinco universidades, do Distrito Federal. Os alunos foram considerados investidores capazes de analisar índices de liquidez e de julgar qual seria a melhor opção para investir. Viu-se que as pessoas se sentem incentivadas a investir em empresas nas quais foi criada uma falsa base de comparação, pela presença do chamariz. Esse efeito é observado com maior intensidade em alguns grupos específi cos de investidores. Sugere-se a elaboração de novas pesquisas na área, com o objetivo de observar esse efeito em outras situações e de divulgar o estudo das fi nanças comportamentais.

  4. Economic drivers of mineral supply

    Science.gov (United States)

    Wagner, Lorie A.; Sullivan, Daniel E.; Sznopek, John L.

    2003-01-01

    The debate over the adequacy of future supplies of mineral resources continues in light of the growing use of mineral-based materials in the United States. According to the U.S. Geological Survey, the quantity of new materials utilized each year has dramatically increased from 161 million tons2 in 1900 to 3.2 billion tons in 2000. Of all the materials used during the 20th century in the United States, more than half were used in the last 25 years. With the Earth?s endowment of natural resources remaining constant, and increased demand for resources, economic theory states that as depletion approaches, prices rise. This study shows that many economic drivers (conditions that create an economic incentive for producers to act in a particular way) such as the impact of globalization, technological improvements, productivity increases, and efficient materials usage are at work simultaneously to impact minerals markets and supply. As a result of these economic drivers, the historical price trend of mineral prices3 in constant dollars has declined as demand has risen. When price is measured by the cost in human effort, the price trend also has been almost steadily downward. Although the United States economy continues its increasing mineral consumption trend, the supply of minerals has been able to keep pace. This study shows that in general supply has grown faster than demand, causing a declining trend in mineral prices.

  5. Glycine Polymerization on Oxide Minerals

    Science.gov (United States)

    Kitadai, Norio; Oonishi, Hiroyuki; Umemoto, Koichiro; Usui, Tomohiro; Fukushi, Keisuke; Nakashima, Satoru

    2016-07-01

    It has long been suggested that mineral surfaces played an important role in peptide bond formation on the primitive Earth. However, it remains unclear which mineral species was key to the prebiotic processes. This is because great discrepancies exist among the reported catalytic efficiencies of minerals for amino acid polymerizations, owing to mutually different experimental conditions. This study examined polymerization of glycine (Gly) on nine oxide minerals (amorphous silica, quartz, α-alumina and γ-alumina, anatase, rutile, hematite, magnetite, and forsterite) using identical preparation, heating, and analytical procedures. Results showed that a rutile surface is the most effective site for Gly polymerization in terms of both amounts and lengths of Gly polymers synthesized. The catalytic efficiency decreased as rutile > anatase > γ-alumina > forsterite > α- alumina > magnetite > hematite > quartz > amorphous silica. Based on reported molecular-level information for adsorption of Gly on these minerals, polymerization activation was inferred to have arisen from deprotonation of the NH3 + group of adsorbed Gly to the nucleophilic NH2 group, and from withdrawal of electron density from the carboxyl carbon to the surface metal ions. The orientation of adsorbed Gly on minerals is also a factor influencing the Gly reactivity. The examination of Gly-mineral interactions under identical experimental conditions has enabled the direct comparison of various minerals' catalytic efficiencies and has made discussion of polymerization mechanisms and their relative influences possible Further systematic investigations using the approach reported herein (which are expected to be fruitful) combined with future microscopic surface analyses will elucidate the role of minerals in the process of abiotic peptide bond formation.

  6. Mineral mining machines

    Energy Technology Data Exchange (ETDEWEB)

    Mc Gaw, B.H.

    1984-01-01

    A machine for mining minerals is patented. It is a cutter loader with a drum actuating element of the worm type equipped with a multitude of cutting teeth reinforced with tungsten carbide. A feature of the patented machine is that all of the cutting teeth and holders on the drum have the identical design. This is achieved through selecting a slant angle for the cutting teeth which is the mean between the slant angle of the conventional radial teeth and the slant angle of the advance teeth. This, in turn, is provided thanks to the corresponding slant of the holders relative to the drum and (or) the slant of the cutting part of the teeth relative to their stems. Thus, the advance teeth projecting beyond the surface of the drum on the face side and providing upper and lateral clearances have the same angle of attack as the radial teeth, that is, from 20 to 35 degrees. A series of modifications of the cutting teeth is patented. One of the designs allows the cutting tooth to occupy a varying position relative to the drum, from the conventional vertical to an inverted, axially projecting position. In the last case the tooth in the extraction process provides the upper and lateral clearances for the drum on the face side. Among the different modifications of the cutting teeth, a design is proposed which provides for the presence of a stem which is shaped like a truncated cone. This particular stem is designed for use jointly with a wedge which unfastens the teeth and is placed in a holder. The latter is completed in a transverse slot thanks to which the rear end of the stem is compressed, which simplifies replacement of a tooth. Channels are provided in the patented machine for feeding water to the worm spiral, the holders and the cutting teeth themselves in order to deal with dust.

  7. Mineral Commodity Profiles -- Rubidium

    Science.gov (United States)

    Butterman, W.C.; Reese, R.G.

    2003-01-01

    Overview -- Rubidium is a soft, ductile, silvery-white metal that melts at 39.3 ?C. One of the alkali metals, it is positioned in group 1 (or IA) of the periodic table between potassium and cesium. Naturally occurring rubidium is slightly radioactive. Rubidium is an extremely reactive metal--it ignites spontaneously in the presence of air and decomposes water explosively, igniting the liberated hydrogen. Because of its reactivity, the metal and several of its compounds are hazardous materials, and must be stored and transported in isolation from possible reactants. Although rubidium is more abundant in the earth?s crust than copper, lead, or zinc, it forms no minerals of its own, and is, or has been, produced in small quantities as a byproduct of the processing of cesium and lithium ores taken from a few small deposits in Canada, Namibia, and Zambia. In the United States, the metal and its compounds are produced from imported raw materials by at least one company, the Cabot Corporation (Cabot, 2003). Rubidium is used interchangeably or together with cesium in many uses. Its principal application is in specialty glasses used in fiber optic telecommunication systems. Rubidium?s photoemissive properties have led to its use in night-vision devices, photoelectric cells, and photomultiplier tubes. It has several uses in medical science, such as in positron emission tomographic (PET) imaging, the treatment of epilepsy, and the ultracentrifugal separation of nucleic acids and viruses. A dozen or more other uses are known, which include use as a cocatalyst for several organic reactions and in frequency reference oscillators for telecommunications network synchronization. The market for rubidium is extremely small, amounting to 1 to 2 metric tons per year (t/yr) in the United States. World resources are vast compared with demand.

  8. Book review: Mineral resource estimation

    Science.gov (United States)

    Mihalasky, Mark J.

    2016-01-01

    Mineral Resource Estimation is about estimating mineral resources at the scale of an ore deposit and is not to be mistaken with mineral resource assessment, which is undertaken at a significantly broader scale, even if similar data and geospatial/geostatistical methods are used. The book describes geological, statistical, and geostatistical tools and methodologies used in resource estimation and modeling, and presents case studies for illustration. The target audience is the expert, which includes professional mining geologists and engineers, as well as graduate-level and advanced undergraduate students.

  9. The NAS Alert System: a look at the first eight years

    Science.gov (United States)

    Fuller, Pam L.; Neilson, Matt; Huge, Dane H.

    2013-01-01

    The U.S. Geological Survey's Nonindigenous Aquatic Species (NAS) database program (http://nas.er.usgs.gov) tracks the distribution of introduced aquatic organisms across the United States. Awareness of, and timely response to, novel species introductions by those involved in nonindigenous aquatic species management and research requires a framework for rapid dissemination of occurrence data as it is incorporated into the NAS database. In May 2004, the NAS program developed an alert system to notify registered users of new introductions as part of a national early detection/rapid response system. This article summarizes information on system users and dispatched alerts from the system's inception through the end of 2011. The NAS alert system has registered over 1,700 users, with approximately 800 current subscribers. A total of 1,189 alerts had been transmitted through 2011. More alerts were sent for Florida (134 alerts) than for any other state. Fishes comprise the largest taxonomic group of alerts (440), with mollusks, plants, and crustaceans each containing over 100 alerts. Most alerts were for organisms that were intentionally released (414 alerts), with shipping, escape from captivity, and hitchhiking also representing major vectors. To explore the archive of sent alerts and to register, the search and signup page for the alert system can be found online at http://nas.er.usgs.gov/AlertSystem/default.aspx.

  10. Refractory, Abrasive and Other Industrial Mineral Operations

    Data.gov (United States)

    Department of Homeland Security — This map layer includes refractory, abrasive, and other industrial minerals operations in the United States. The data represent commodities covered by the Minerals...

  11. VT Mineral Resources - MRDS Extract

    Data.gov (United States)

    Vermont Center for Geographic Information — (Link to Metadata) MRDSVT is an extract from the Mineral Resources Data System (MRDS) covering the State of Vermont only. MRDS database contains the records provided...

  12. Nondigestible carbohydrates and mineral bioavailability.

    Science.gov (United States)

    Greger, J L

    1999-07-01

    Generally, fiber and compounds associated with fiber in cereal products (e.g., phytates) have been found to reduce the apparent absorption of minerals (such as calcium, magnesium, zinc and manganese) in humans, livestock and animal models. The effects of "soluble" forms of fiber (specifically pectins, gums, resistant starches, lactulose, oligofructose and inulin) on mineral absorption are more difficult to characterize. The addition of these soluble forms of fiber has been found in various studies to add viscosity to the gut contents, promote fermentation and the production of volatile fatty acids in the cecum, have a trophic effect on the ceca of animals and increase serum enteroglucagon concentrations. Thus it is not surprising that the addition of soluble forms of fiber to diets often has been found to improve absorption of minerals. This may reflect absorption of electrolytes from the large intestine. Future work should address the mechanisms by which ingestion of nondigestible carbohydrates improves mineral absorption in humans.

  13. BET measurements: Outgassing of minerals

    DEFF Research Database (Denmark)

    Clausen, Liselotte; Fabricius, Ida Lykke

    2000-01-01

    Outgassing minerals at elevated temperatures prior to BET measurements can lead to phase changes, especially in the case of amorphous and poorly crystalline materials. In order to evaluate the applicability of the BET method when low outgassing temperatures are required, selected aquifer minerals...... were outgassed at different temperatures and for different times. The studied minerals are 2-line ferrihydrite, goethite, lepidocrocite, quartz, calcite, ®-alumina, and kaolinite. The results demonstrate that measured specific surface areas of iron oxides are strongly dependent on outgassing conditions...... because the surface area increased by 170% with increasing temperature. In the poorly crystalline minerals, phase changes caused by heating were observed at temperatures lower than 100±C. Therefore low outgassing temperatures are preferable for minimizing phase changes. As demonstrated in this study...

  14. Infrared spectra of mineral species

    CERN Document Server

    Chukanov, Nikita V

    2014-01-01

    This book details more than 3,000 IR spectra of more than 2,000 mineral species collected during last 30 years. It features full descriptions and analytical data of each sample for which IR spectrum was obtained.

  15. ROCKS & MINERALS DETERMINATION AND ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    <正>20111673 Cao Ban(Zhejiang Institute of Geological & Mineral Resources,Hangzhou 310007,China);Ma Jun Determination of 16 Polycyclic Aromatic Hydrocarbons in Groundwater by High Performance Liquid Chromatography with Fluorescence-Ultraviolet Detector(Rock and Mineral Analysis,ISSN0254-5357,CN11-2131/TD,29(5),2010,p.539-542,2 illus.,4 tables,15 refs.)Key words:liquid chromatography,polycyclic aromatic hydrocarbons,fluorescence analysis

  16. Mineral resources of Vietnam

    Directory of Open Access Journals (Sweden)

    Kušnír Imrich

    2000-06-01

    Full Text Available Vietnam je bohatý na nerastné suroviny, ktoré sa nachádzajú prevažne na severe krajiny. Ložiská bauxitov, fosfátov, vzácnych zemín (REE, majú svetový význam. Ale i zásoby celého radu ïalších surovín (ropy, uhlia, zlata, železných rúd, chromitu, cínu, ilmenitu, medi, grafitu, atï. sú významné, ekonomicky ažite¾né a ich potenciál je obrovský. Za uvedené nerastné bohatstvo je „zodpovednᓠrozmanitá geologická stavba krajiny. Taktiež i morfológia a klíma (vlhká, tropická prispeli ku vytvoreniu niektorých ložísk (bauxity v krasových priehlbniach, atï.. Súèasná produkcia, okrem ropy (3,5 Mt/rok, zahròuje: 10,7 Mt uhlia, 3,5 Mt chromitu, asi 1 000 kg zlata, grafitu, kaolínu a mnohé iné minerály. Napriek tomu, je banícky priemysel v porovnaní so surovinovou základòou slabo vyvinutý. K jeho rozvoju urèite prispeje i úèas zahranièných spoloèností, odnedávna prítomných pri prieskume a ažbe surovín urèených pre export. Okrem struèného úvodu do geológie krajiny, obsahuje tento èlánok krátky popis nerastného bohatstva Vietnamu.

  17. Testing New Programming Paradigms with NAS Parallel Benchmarks

    Science.gov (United States)

    Jin, H.; Frumkin, M.; Schultz, M.; Yan, J.

    2000-01-01

    Over the past decade, high performance computing has evolved rapidly, not only in hardware architectures but also with increasing complexity of real applications. Technologies have been developing to aim at scaling up to thousands of processors on both distributed and shared memory systems. Development of parallel programs on these computers is always a challenging task. Today, writing parallel programs with message passing (e.g. MPI) is the most popular way of achieving scalability and high performance. However, writing message passing programs is difficult and error prone. Recent years new effort has been made in defining new parallel programming paradigms. The best examples are: HPF (based on data parallelism) and OpenMP (based on shared memory parallelism). Both provide simple and clear extensions to sequential programs, thus greatly simplify the tedious tasks encountered in writing message passing programs. HPF is independent of memory hierarchy, however, due to the immaturity of compiler technology its performance is still questionable. Although use of parallel compiler directives is not new, OpenMP offers a portable solution in the shared-memory domain. Another important development involves the tremendous progress in the internet and its associated technology. Although still in its infancy, Java promisses portability in a heterogeneous environment and offers possibility to "compile once and run anywhere." In light of testing these new technologies, we implemented new parallel versions of the NAS Parallel Benchmarks (NPBs) with HPF and OpenMP directives, and extended the work with Java and Java-threads. The purpose of this study is to examine the effectiveness of alternative programming paradigms. NPBs consist of five kernels and three simulated applications that mimic the computation and data movement of large scale computational fluid dynamics (CFD) applications. We started with the serial version included in NPB2.3. Optimization of memory and cache usage

  18. Causas e leis nas ciências do homem

    Directory of Open Access Journals (Sweden)

    Sara Albieri

    2011-12-01

    Full Text Available A proposta humeana acerca do método e da investigação na ciência do homem tornou-o um precursor do conhecido modelo covering-law de explicação científica, tal como defendido por Hempel, Nagel e outros filósofos contemporâneos da ciência. A interpretação da teoria da ciência de Hume como precursora desse modelo costuma ser majoritária entre os comentadores de sua filosofia. Apenas Donald Livingston travou uma discussão singular contra essa quase unanimidade, propondo-se a defender a existência de dois modelos de explicação na epistemologia de Hume, um adequado às ciências naturais, outro às morais. O autor apóia-se em certas passagens em que Hume parece reconhecer que, em ciências morais, predominariam as explicações recorrendo a causas morais, as quais consistiriam nas razões do agente ou conjunto de agentes envolvidos no evento a ser explicado. Defendemos que a diversidade das explicações causais naturais e morais em Hume pode ser discutida, não a partir de uma distinção radical de natureza, como aquela que Livingston quer estabelecer, mas a partir de uma distinção de grau: os graus de certeza que distinguem entre provas e probabilidades, entre explicações pela via dedutiva a partir de leis ou por generalizações estatísticas. Isto é, mais de acordo com a assimetria que Nagel reconhece entre ciências do particular e generalizadoras, quanto ao objetivo de estabelecer leis, no segundo caso, ou de apenas aplicá-las, no primeiro. Uma distinção compatível com aquela que Hume já adotara, atribuindo graus diferentes de generalidade de modo análogo a ciências naturais ou morais.Hume's proposal of a science of man is often taken as a precursor of the now well-known covering-law model of scientific explanation, sustained by Hempel, Nagel and other contemporary philosophers of science. Among Hume's commentators D. Livingston is an exception, defending the existence of two models of explanation in Hume

  19. A crise do jornalismo: ecos e silêncios nas práticas e nas narrativas

    Directory of Open Access Journals (Sweden)

    Christa Liselote Berger Ramos Kuschick

    2015-12-01

    Full Text Available Pesquisadores e jornalistas dedicam-se a compreender que tensionamentos abalam o sistema de produção de sentido que até então ostentava certa hegemonia como discurso que representa um presente social de referência (GOMIS, 1999. Este artigo reflete sobre o modo como a crise do jornalismo tem aparecido nos discursos e nas práticas da própria imprensa. A suspeita inicial é a de que a crise configura-se em acontecimento silenciado pela mídia hegemônica. Por outro lado, inevitavelmente ela transparece também nas práticas jornalísticas, uma vez que tem atingido de forma intensa a estrutura de funcionamento das redações. Além disso, tem provocado os jornalistas a reverem suas competências e o campo a transformar - de certo modo - seus pressupostos e modos de fazer. PALAVRAS-CHAVE: crise do jornalismo; práticas; hegemonia; futuro do jornalismo.    ABSTRACT Researchers and journalists are dedicated to understand the tensions that shake the production system of journalism, which has had certain hegemony as social reference speech  (GOMIS, 1999. This article reflects on how the crisis journalism has appeared in speeches and in the press itself practices. The initial suspicion is that the crisis sets in muted event by the mainstream media. Moreover, it inevitably also transpires in newspaper practice, once it has reached the working structure of essays. It has caused journalists to review their skills and transform the field - in a way - their assumptions and ways of doing. KEYWORDS: journalism crisis; practices; hegemony; future of journalism.   RESUMEN Los investigadores y periodistas se dedican a entender las tensiones que sacuden el sistema de producción de sentidos del periodismo que hasta ahora se jactó cierta hegemonia. En este artículo se reflexiona sobre cómo ha aparecido la crisis del periodismo en los discursos y en las prácticas de la prensa. La sospecha inicial es que la crisis ha sido silenciada por los grandes

  20. Defining reactive sites on hydrated mineral surfaces: Rhombohedral carbonate minerals

    Science.gov (United States)

    Villegas-Jiménez, Adrián; Mucci, Alfonso; Pokrovsky, Oleg S.; Schott, Jacques

    2009-08-01

    Despite the success of surface complexation models (SCMs) to interpret the adsorptive properties of mineral surfaces, their construct is sometimes incompatible with fundamental chemical and/or physical constraints, and thus, casts doubts on the physical-chemical significance of the derived model parameters. In this paper, we address the definition of primary surface sites (i.e., adsorption units) at hydrated carbonate mineral surfaces and discuss its implications to the formulation and calibration of surface equilibria for these minerals. Given the abundance of experimental and theoretical information on the structural properties of the hydrated (10.4) cleavage calcite surface, this mineral was chosen for a detailed theoretical analysis of critical issues relevant to the definition of primary surface sites. Accordingly, a single, generic charge-neutral surface site ( tbnd CaCO 3·H 2O 0) is defined for this mineral whereupon mass-action expressions describing adsorption equilibria were formulated. The one-site scheme, analogous to previously postulated descriptions of metal oxide surfaces, allows for a simple, yet realistic, molecular representation of surface reactions and provides a generalized reference state suitable for the calculation of sorption equilibria for rhombohedral carbonate minerals via Law of Mass Action (LMA) and Gibbs Energy Minimization (GEM) approaches. The one-site scheme is extended to other rhombohedral carbonate minerals and tested against published experimental data for magnesite and dolomite in aqueous solutions. A simplified SCM based on this scheme can successfully reproduce surface charge, reasonably simulate the electrokinetic behavior of these minerals, and predict surface speciation agreeing with available spectroscopic data. According to this model, a truly amphoteric behavior is displayed by these surfaces across the pH scale but at circum-neutral pH (5.8-8.2) and relatively high ΣCO 2 (⩾1 mM), proton/bicarbonate co

  1. Study on mineral processing technology for abrasive minerals

    Energy Technology Data Exchange (ETDEWEB)

    Hong, Seong Woong; Yang, Jung Il; Hwang, Seon Kook; Choi, Yeon Ho; Cho, Ken Joon; Shin, Hee Young [Korea Inst. of Geology Mining and Materials, Taejon (Korea, Republic of)

    1995-12-01

    Buyeo Materials in Buyeogun, Choongnam province is a company producing feldspar concentrate, but does not yet utilize the garnet as abrasive material and other useful heavy minerals wasted out from the process of feldspar ore. The purpose of this study is to develop technology and process for the recovery of garnet concentrate. As results, the garnet is defined as ferro manganese garnet. The optimum process for recovery of garnet concentrate is to primarily concentrate heavy minerals from tailings of feldspar processing. And secondly the heavy minerals concentrated is dried and separated garnet concentrate from other heavy minerals. At this time, the garnet concentrate is yield by 0.176%wt from 0.31%wt of heavy minerals in head ore. The garnet concentrate contains 33.35% SiO{sub 2}, 12.20% Al{sub 2}O{sub 3}, 28.47% Fe{sub 2}O{sub 3}, 11.96% MnO. As for utilization of abrasive materials, a fundamental data was established on technology of grinding and classification. (author). 13 refs., 47 figs., 24 tabs.

  2. The astacin metalloprotease moulting enzyme NAS-36 is required for normal cuticle ecdysis in free-living and parasitic nematodes.

    Science.gov (United States)

    Stepek, Gillian; McCormack, Gillian; Birnie, Andrew J; Page, Antony P

    2011-02-01

    Nematodes represent one of the most abundant and species-rich groups of animals on the planet, with parasitic species causing chronic, debilitating infections in both livestock and humans worldwide. The prevalence and success of the nematodes is a direct consequence of the exceptionally protective properties of their cuticle. The synthesis of this cuticle is a complex multi-step process, which is repeated 4 times from hatchling to adult and has been investigated in detail in the free-living nematode, Caenorhabditis elegans. This process is known as moulting and involves numerous enzymes in the synthesis and degradation of the collagenous matrix. The nas-36 and nas-37 genes in C. elegans encode functionally conserved enzymes of the astacin metalloprotease family which, when mutated, result in a phenotype associated with the late-stage moulting defects, namely the inability to remove the preceding cuticle. Extensive genome searches in the gastrointestinal nematode of sheep, Haemonchus contortus, and in the filarial nematode of humans, Brugia malayi, identified NAS-36 but not NAS-37 homologues. Significantly, the nas-36 gene from B. malayi could successfully complement the moult defects associated with C. elegans nas-36, nas-37 and nas-36/nas-37 double mutants, suggesting a conserved function for NAS-36 between these diverse nematode species. This conservation between species was further indicated when the recombinant enzymes demonstrated a similar range of inhibitable metalloprotease activities.

  3. Mineral commodity profiles: nitrogen

    Science.gov (United States)

    Kramer, Deborah A.

    2004-01-01

    Overview -- Nitrogen (N) is an essential element of life and a part of all animal and plant proteins. As a part of the DNA and RNA molecules, nitrogen is an essential constituent of each individual's genetic blueprint. As an essential element in the chlorophyll molecule, nitrogen is vital to a plant's ability to photosynthesize. Some crop plants, such as alfalfa, peas, peanuts, and soybeans, can convert atmospheric nitrogen into a usable form by a process referred to as 'fixation.' Most of the nitrogen that is available for crop production, however, comes from decomposing animal and plant waste or from commercially produced fertilizers. Commercial fertilizers contain nitrogen in the form of ammonium and/or nitrate or in a form that is quickly converted to the ammonium or nitrate form once the fertilizer is applied to the soil. Ammonia is generally the source of nitrogen in fertilizers. Anhydrous ammonia is commercially produced by reacting nitrogen with hydrogen under high temperatures and pressures. The source of nitrogen is the atmosphere, which is almost 80 percent nitrogen. Hydrogen is derived from a variety of raw materials, which include water, and crude oil, coal, and natural gas hydrocarbons. Nitrogen-based fertilizers are produced from ammonia feedstocks through a variety of chemical processes. Small quantities of nitrates are produced from mineral resources principally in Chile. In 2002, anhydrous ammonia and other nitrogen materials were produced in more than 70 countries. Global ammonia production was 108 million metric tons (Mt) of contained nitrogen. With 28 percent of this total, China was the largest producer of ammonia. Asia contributed 46 percent of total world ammonia production, and countries of the former U.S.S.R. represented 13 percent. North America also produced 13 percent of the total; Western Europe, 9 percent; the Middle East, 7 percent; Central America and South America, 5 percent; Eastern Europe, 3 percent; and Africa and Oceania

  4. [Mineral water as a cure].

    Science.gov (United States)

    Nocco, Priska Binz

    2008-01-01

    The treatment of diseases with mineral spring water belongs to the oldest medical therapies. The "remedy" mineral water is therefore of importance also within the pharmacy. The present pharmacy historical work examines the impact of the use of mineral waters, as well as of their dried components, as therapeutic agents in the 19th and early 20th centuries, i.e. from approx. 1810 to 1930, as well as the contributions given by pharmacists in the development and analysis of mineral water springs. Beside these aspects, the aim here is also to describe the role played by pharmacists in the production of artificial mineral water as well as in the sale and wholesale of natural and artificial mineral water. In the first part of this work the situation in Switzerland and its surrounding countries, such as Germany, France, Italy and Austria, is discussed. The second part contains a case-study of the particular situation in the Canton Tessin. It is known from the scientific literature published at that time that information on mineral water was frequently reported. Starting from the beginning of the 19th century the number of such publications increased tremendously. The major part of them were publications in scientific journals or contributions to medical and pharmaceutical manuals and reference books. In particular the spa-related literature, such as spa-guides, was of growing interest to a broad public. The inclusion of monographs into the Swiss, the Cantonal as well the foreign pharmacopoeias granted a legal frame for the mineral waters and their dried components. These works are of major importance from a pharmacy historical standpoint and represent a unique proof of historical evidence of the old medicinal drug heritage. The most frequently used therapies based on mineral waters were drinking and bath cures. Several diseases, particularly those of a chronic character, were treated with mineral waters. The positive influence of these cures on the recovery of the patients

  5. 21 CFR 573.680 - Mineral oil.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 6 2010-04-01 2010-04-01 false Mineral oil. 573.680 Section 573.680 Food and... Listing § 573.680 Mineral oil. Mineral oil may be safely used in animal feed, subject to the provisions of this section. (a) Mineral oil, for the purpose of this section, is that complying with the...

  6. Um estudo sôbre a eosinofilia nas helmintoses

    Directory of Open Access Journals (Sweden)

    Ruy Gomes de Moraes

    1968-08-01

    "índice eosinofilico", o qual corresponde à relação entre o número de casos de um determinado grupo com Eo > 5% e Eo < 5%. Para o total de casos positivos, ao "índice eosinofílico" denominamos "índice eosinofílico médio" em para o total dos negativos "índice eosinofílico residual"; 11 - Estabelecendo-se o "índice eosinofílico", pode-se ajuizar a capacidade eosinofilogênica de cada helminto isoladamente, bem como a de suas associações; 12 - Atenção especial foi dada aos problemas da existência da hipereosinofilia nos casos com exames coprológicos negativos para helmintos, tendo-se passado em revista vários dos aspectos biológicos que o assunto comporta; 13 - Outra questão de grande importância clínica explanada neste trabalho é a do encontro de casos de parasitismo por vermes, sem hipereosinofilia. O autor, baseado em seus dados e em outros colhidos na literatura sôbre o assunto, discute a fisiopatologia da eosinopoiese nas helmintoses e ojerece uma interpretação para êste fato ainda não defintivamente esclarecido.

  7. Abordagem centrada nas pessoas Approach focused on people

    Directory of Open Access Journals (Sweden)

    Ana Carolina Diniz Oliveira

    2010-11-01

    Full Text Available A Medicina de Família e comunidade pressupõe um novo marco epistemológico que obriga também o uso de instrumentos e ferramentas que se correspondam com ela. Este modelo de atenção permite levar adiante uma consulta onde estejam presentes todas as categorias nas quais se expressa o processo saúde-doença. A Medicina de Família pretende combinar ambas visões e para isto oferece elementos para incorporar a moléstia como parte essencial da nossa sistemática de abordagem do paciente sendo o foco principal a abordagem por problemas, que nada mais é que aquilo que preocupa a pessoa, sua família ou o medico, ou a todos, e as vezes haverá moléstia, em outras doenças e em outras tantas ambas coexistirão. Sabe-se que o impacto de um problema de saúde sobre uma pessoa não só afeta a ela, mas também ao seu entorno. Este por sua vez pode atuar como origem ou perpetuador da crise, ou então servir para ajudar na resolução do conflito. Distintas ferramentas servem para o propósito de conhecer o contexto no qual a crise de saúde se desenvolve, tais como: genograma, ciclo vital individual e familiar. Toda vez que duas pessoas se comunicam, o acordo ou desacordo são variáveis possíveis. Narelação médico-paciente isto não é uma exceção. Os valores, crenças, sentimentos e informações de cada indivíduo são diferentes, e não necessariamente médicos e pacientes estão de acordo em v��rios pontos durante uma consulta. O objetivo é a necessidade de alcançar um mínimo de acordos para que esta consulta tenha efetividade terapêutica, sendo assim importante encontrar um território comum. As relações em geral envolvem poder, cuidado, sentimentos, confiança e objetivos. O objetivo neste tipo de relação deve ser obviamente compartilhado por ambos, e não pode ser outro que o de conseguir o maior grau de saúde para nosso paciente. Assim, nossa especialidade, considerada de baixa complexidade, transforma-se em uma

  8. Active ear acupuncture points in neonates with neonatal abstinence syndrome (NAS).

    Science.gov (United States)

    Raith, Wolfgang; Kutschera, Jörg; Müller, Wilhelm; Urlesberger, Berndt

    2011-01-01

    The aim of the study was to determine the presence of acupuncture ear points in neonates with Neonatal Abstinence Syndrome (NAS). NAS occurs in the first days of life in neonates whose mothers have a history of drug abuse, and may also occur in neonates whose mothers are currently following substitution therapy. The patients are neonates with NAS admitted over one year to the Division of Neonatology at the University Hospital Graz. The examination took place on the third day after delivery (mean value 70.3 hours) and was performed by a neuronal pen (PS 3 © Silberbauer, Vienna, Austria). An integrated sound and optical signal detected the active ear points that were then placed on an ear map. We investigated six neonates (four male, two female). All investigated neonates showed the presence of active ear acupuncture points. The psychovegetative rim was the most common organic area of the children, following by a few organic points. This corresponds with the results found in healthy neonates. In all neonates with NAS, we found the presence of psychic ear points. The identified psychic ear points are the frustration-point, R-point and the psychotropic area nasal from the incisura intertragica. In all neonates with NAS, active organic and psychic ear points were detectable in both ears. In the future, it could be possible to use active ear points for diagnostic and therapeutic purposes.

  9. The NAS perchlorate review: questions remain about the perchlorate RfD.

    Science.gov (United States)

    Ginsberg, Gary; Rice, Deborah

    2005-09-01

    Human exposure to perchlorate is commonplace because it is a contaminant of drinking water, certain foods, and breast milk. The U.S. Environmental Protection Agency (EPA) conducted a perchlorate risk assessment in 2002 that yielded a reference dose (RfD) based on both the animal and human toxicology data. This assessment has been superceded by a recent National Academy of Science (NAS) review that derived a perchlorate RfD that is 20-fold greater (less stringent) than that derived by the U.S. EPA in 2002. The NAS-derived RfD was put on the U.S. EPA's Integrated Risk Information System (IRIS) database very quickly and with no further public review. In this commentary we raise concerns about the NAS approach to RfD development in three areas of toxicity assessment: the dose that the NAS described as a no observable adverse-effect level is actually associated with perchlorate-induced effects; consideration of uncertainties was insufficient; and the NAS considered the inhibition of iodine uptake to be a nonadverse effect. We conclude that risk assessors should carefully evaluate whether the IRIS RfD is the most appropriate value for assessing perchlorate risk.

  10. Theoretical studies of GaInNAs for optoelectronic device applications

    CERN Document Server

    Alexandropoulos, D

    2003-01-01

    This thesis focuses on the theoretical analysis of GalnNAs alloys for use in optoelectronic devices. We develop reliable theoretical models that describe the properties of GaInNAs alloys and apply these to establish design rules. We develop a k centre dot p model for the band structure of GaInNAs-based Quantum Wells (QW) that accounts for valence band mixing effects, strain effects and the N induced coupling of the conduction band states of GaInNAs alloys. We implement the model to study the effect of N on the conduction and valence bands. The optical properties of GaInNAs structures are studied and design rules that ensure optimal performance are derived for 1.3 mu m emission. It is established that high N content decreases the differential gain and the Momentum Matrix Element (MME) for TE polarisation while it increases the transparency concentration and the MME for TM polarisation. The material gain and linewidth enhancement factor are found to have comparable values to InGaAsP structures. The effect of al...

  11. Effect of mineral processing wastewater on flotation of sulfide minerals

    Institute of Scientific and Technical Information of China (English)

    CHEN Jian-ming; LIU Run-qing; SUN Wei; QIU Guan-zhou

    2009-01-01

    The effects of mineral processing wastewater on sulfide minerals were investigated by flotation, infrared spectrometry and electrochemistry test. The results show that lead-concentrate water can improve the flotation of galena, while the sulfur-concentrate water has negative effect on flotation of galena compared with distilled water. The flotation behavior of pyrite is contrary to that of galena in three kinds of water. Infrared spectra indicate that the residual collector in the lead-concentrate water is beneficial to the formation of lead xanthate on the surface of galena. Electrochemistry results indicate that electrochemistry reaction on galena surface has apparent change. The anode polarization is improved and cathode polarization is depressed.

  12. LAS PROTEÍNAS DESORDENADAS Y SU FUNCIÓN: UNA NUEVA FORMA DE VER LA ESTRUCTURA DE LAS PROTEÍNAS Y LA RESPUESTA DE LAS PLANTAS AL ESTRÉS

    OpenAIRE

    César Luis Cuevas-Velázquez; Alejandra A. Covarrubias-Robles

    2011-01-01

    El dogma que relaciona la función de una proteína con una estructura tridimensional definida ha sido desafiado durante los últimos años por el descubrimiento y caracterización de las proteínas conocidas como proteínas no estructuradas o desordenadas. Estas proteínas poseen una elevada flexibilidad estructural la cual les permite adoptar estructuras diferentes y, por tanto, reconocer ligandos diversos conservando la especificidad en el reconocimiento de los mismos. A las proteínas de este tipo...

  13. Proteínas celulares cómplices de las proteínas regulatorias y accesorias del VIH-1.

    OpenAIRE

    María Eugenia Castaño; Silvio Urcuqui

    2009-01-01

    La resistencia del virus de la inmunodeficiencia humana tipo 1 (VIH-1) a medicamentos antivirales ha presionado la búsqueda de métodos alternativos de terapia. En esta revisión, se presenta un análisis de los avances más recientes en el estudio de la interacción entre las proteínas regulatorias y accesorias del VIH-1 con factores celulares, sus efectos en la célula huésped y los beneficios para el virus. Se muestra cómo estas proteínas virales alteran procesos fundamentales de la célula huésp...

  14. Proteínas celulares cómplices de las proteínas regulatorias y accesorias del VIH-1.

    Directory of Open Access Journals (Sweden)

    María Eugenia Castaño

    2009-11-01

    Full Text Available La resistencia del virus de la inmunodeficiencia humana tipo 1 (VIH-1 a medicamentos antivirales ha presionado la búsqueda de métodos alternativos de terapia. En esta revisión, se presenta un análisis de los avances más recientes en el estudio de la interacción entre las proteínas regulatorias y accesorias del VIH-1 con factores celulares, sus efectos en la célula huésped y los beneficios para el virus. Se muestra cómo estas proteínas virales alteran procesos fundamentales de la célula huésped de manera muy precisa y las utilizan para aumentar la replicación viral, evadir la respuesta inmune del hospedero y causar enfermedad.

  15. Clay minerals in pollution control

    Energy Technology Data Exchange (ETDEWEB)

    Tateo, F. [Consiglio Nazionale delle Ricerche, Istituto di Ricerca sulle Argille, Tito Scalo, PZ (Italy)

    2000-07-01

    Clay minerals are fundamental constituents of life, not only as possible actors in the development of life on the Earth (Cairns-Smith and Hartman, 1986), but mainly because they are essential constituents of soils, the interface between the solid planet and the continental biosphere. Many, many authors have devoted themselves to the study of clays and clay minerals since the publication of the early modern studies by Grim (1953, 1962) and Millot (1964). In those years two very important associations were established in Europe (Association Internationale pour l'Etude des Argiles, AIPEA) and in the USA (Clay Mineral Society, CMS). The importance of these societies is to put together people that work in very different fields (agronomy, geology, geochemistry, industry, etc.), but with a common language (clays), very useful in scientific work. Currently excellent texts are being published, but introductory notes are also available on the web (Schroeder, 1998).

  16. Proton induced luminescence of minerals

    Energy Technology Data Exchange (ETDEWEB)

    Calvo del Castillo, H.; Millan, A.; Calderon, T. [Depto. Geologia y Geoquimica, Universidad Autonoma de Madrid, Ctra. Colmenar, km. 15, 28049, Madrid (Spain); Beneitez, P. [Departamento Quimica Fisica Aplicada, Universidad Autonoma de Madrid Cantoblanco, Madrid (Spain); Ruvalcaba S, J.L. [lFUNAM, Circuito de la lnvestigacion Cientifica s/n, Ciudad Universitaria, 04510 Mexico D.F. (Mexico)

    2008-07-01

    This paper presents a summary of Ionoluminescence (IL) for several minerals commonly found in jewellery pieces and/or artefacts of historical interest. Samples including silicates and non-silicates (native elements, halide, oxide, carbonate and phosphate groups) have been excited with a 1.8 MeV proton beam, and IL spectra in the range of 200- 900 nm have been collected for each one using a fiber optic coupled spectrometer. Light emissions have been related to Cr{sup 3+}, Mn{sup 2+} and Pr{sup 3+} ions, as well as intrinsic defects in these minerals. Results show the potential of IL for impurity characterization with high detection limits, local symmetry studies, and the study of the origin of minerals. (Author)

  17. Improved performance in GaInNAs solar cells by hydrogen passivation

    Science.gov (United States)

    Fukuda, M.; Whiteside, V. R.; Keay, J. C.; Meleco, A.; Sellers, I. R.; Hossain, K.; Golding, T. D.; Leroux, M.; Al Khalfioui, M.

    2015-04-01

    The effect of UV-activated hydrogenation on the performance of GaInNAs solar cells is presented. A proof-of-principle investigation was performed on non-optimum GaInNAs cells, which allowed a clearer investigation of the role of passivation on the intrinsic nitrogen-related defects in these materials. Upon optimized hydrogenation of GaInNAs, a significant reduction in the presence of defect and impurity based luminescence is observed as compared to that of unpassivated reference material. This improvement in the optical properties is directly transferred to an improved performance in solar cell operation, with a more than two-fold improvement in the external quantum efficiency and short circuit current density upon hydrogenation. Temperature dependent photovoltaic measurements indicate a strong contribution of carrier localization and detrapping processes, with non-radiative processes dominating in the reference materials, and evidence for additional strong radiative losses in the hydrogenated solar cells.

  18. Cloning and Sequence Analysis of the Promoters of ZmNAS1 and ZmNAS2 Genes in Maize%玉米ZmNAS1和ZmNAS2基因启动子的克隆与序列分析

    Institute of Scientific and Technical Information of China (English)

    李俊; 李岩; 吴承来; 董炳雪; 张倩倩; 张春庆

    2012-01-01

    PCR reactions were carried out to clone promoters of ZmNASl and ZmNAS2 from genomic DNA using primers designed according to the whole genome sequence of maize. And then, cis-acting elements and the differences of the promoters between two cultivars(K12 and Shenl37) of maize were analyzed by bioinformatics software. The results showed that compared to cultivar K12, Shenl37 was lack of 574 bp sequences in its promoter, besides existed 24 SNPs. However, the promoters of ZmNAS2 had no difference between the two cultivars of maize. There were some cis-acting elements relevant to light regulating, hormone inducing and stress responding in promoters of ZmNASl and ZmNAS2 genes, and core sequences in elements associated with the iron-deficiency-response were also identified. According to the a-nalysis of promoter elements, we make a pre-judgement that expression and regulation of ZmNASl and ZmNASl were a complex process, and the two genes were regulated by several signals besides iron-deficiency stress. In addition, the promoters of ZmNASl are significantly different in the two cultivars, which indicated that the expression and regulation of ZmNASl between the two cultivars are not same.%根据已知玉米全基因组序列设计引物,采用PCR方法从基因组DNA中克隆两种玉米材料的ZmNAS1和ZmNAS2基因启动子,利用生物信息学软件对启动子元件进行分析预测并比较在两种材料间差异.结果表明,ZmNAS1基因启动子在两种材料上差异明显,沈137较K12除一段574 bp缺失外,他们之间还有24处单核苷酸多态性位点;两种材料间的ZmNAS2基因启动子无差异.ZmNAS1和ZmNAS2基因启动子均具有一些与光调控、激素诱导、响应逆境胁迫等有关的顺式作用元件,但数目存在一定差异;两个基因启动子上都有一定数目缺铁诱导元件的核心序列.根据启动子元件分析,初步判断ZmNAS1和ZmNAS2基因除受缺铁诱导表达外,还可能受到其他多种信号的共

  19. Improved performance in GaInNAs solar cells by hydrogen passivation

    Energy Technology Data Exchange (ETDEWEB)

    Fukuda, M.; Whiteside, V. R.; Keay, J. C.; Meleco, A.; Sellers, I. R. [Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, 440 W. Brooks St., Norman, Oklahoma 73019 (United States); Hossain, K.; Golding, T. D. [Amethyst Research Inc., 123 Case Circle, Ardmore, Oklahoma 73401 (United States); Leroux, M.; Al Khalfioui, M. [CRHEA-CNRS, Rue Bernard Gregory, Valbonne 06560 (France)

    2015-04-06

    The effect of UV-activated hydrogenation on the performance of GaInNAs solar cells is presented. A proof-of-principle investigation was performed on non-optimum GaInNAs cells, which allowed a clearer investigation of the role of passivation on the intrinsic nitrogen-related defects in these materials. Upon optimized hydrogenation of GaInNAs, a significant reduction in the presence of defect and impurity based luminescence is observed as compared to that of unpassivated reference material. This improvement in the optical properties is directly transferred to an improved performance in solar cell operation, with a more than two-fold improvement in the external quantum efficiency and short circuit current density upon hydrogenation. Temperature dependent photovoltaic measurements indicate a strong contribution of carrier localization and detrapping processes, with non-radiative processes dominating in the reference materials, and evidence for additional strong radiative losses in the hydrogenated solar cells.

  20. Investigation of the confinement potential within GaNAs/GaAs multiple quantum wells

    Energy Technology Data Exchange (ETDEWEB)

    Goshima, Keishiro; Kittaka, Akinobu; Fujii, Kensuke; Shiraga, Masahiro; Tsurumachi, Noriaki; Nakanishi, Shunsuke; Koshiba, Shyun; Itoh, Hiroshi [Engineering, Kagawa University, 2217-20, Takamatsu, Kagawa 761-0396 (Japan); Akiyama, Hidefumi [Institute of Solid State Physics, University of Tokyo, Chiba 277-8581 (Japan)

    2011-02-15

    We conducted a detailed investigation of the potential structure within GaNAs/GaAs multiple quantum wells (MQWs) using three independent experimental techniques: the temperature dependence of Photo-luminescence (PL) spectroscopy, time-resolved PL spectroscopy, and degenerate four-wave mixing (DFWM) measurements. We observed a very long lifetime (T{sub 1} = 12 ns) and dephasing time (T{sub 2} = 130 ps) of excitons in the GaNAs/GaAs MQWs. We suggested that the GaNAs/GaAs MQWs have a strong and deep confinement structure that is comparable to that of quantum dots (copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

  1. Invalidez por dor nas costas entre segurados da Previdência Social do Brasil

    Directory of Open Access Journals (Sweden)

    Ney Meziat Filho

    2011-06-01

    Full Text Available OBJETIVO: Descrever as aposentadorias por invalidez decorrente de dor nas costas. MÉTODOS: Estudo descritivo com dados do Sistema Único de Informações de Benefícios e dos Anuários Estatísticos da Previdência Social em 2007. A taxa de incidência de dor nas costas como causa das aposentadorias por invalidez foi calculada segundo as variáveis idade e sexo, nos estados. Os dias de trabalho perdidos por invalidez decorrente de dor nas costas foram calculados segundo atividade profissional. RESULTADOS: A dor nas costas idiopática foi a primeira causa de invalidez entre as aposentadorias previdenciárias e acidentárias. A maioria dos beneficiários residia em área urbana e era comerciário. A taxa de incidência de dor nas costas como causa das aposentadorias por invalidez no Brasil foi de 29,96 por 100.000 contribuintes. Esse valor foi mais elevado entre os homens e entre as pessoas mais velhas. Rondônia exibiu taxa quatro vezes superior ao esperado (RT = 4,05 e a segunda maior taxa, referente à Bahia, foi de aproximadamente duas vezes o esperado (RT = 2,07. Os comerciários foram responsáveis por 96,9% dos dias perdidos por invalidez. CONCLUSÕES: A dor nas costas foi uma importante causa de invalidez em 2007, sobretudo entre comerciários, com grandes diferenças entre os estados.

  2. TRICARE; elimination of the non-availability statement (NAS) requirement for non-emergency inpatient mental health care. Final rule.

    Science.gov (United States)

    2013-02-26

    This final rule eliminates the requirement that states a NAS is needed for non-emergency inpatient mental health care in order for a TRICARE Standard beneficiary's claim to be paid. Currently, NAS are required for non-emergency inpatient mental health care for TRICARE Standard beneficiaries who live within a military treatment facility catchment area. At this time, the number of NASs issued is negligible as most mental health admissions are emergency admissions. Requiring a NAS for a relatively few non-emergency inpatient mental health admissions is disproportionate to the cost of maintaining the systems necessary to process and coordinate the NAS.

  3. Heavy Metals Need Assistance: The Contribution of Nicotianamine to Metal Circulation Throughout the Plant and the Arabidopsis NAS Gene Family.

    Science.gov (United States)

    Schuler, Mara; Bauer, Petra

    2011-01-01

    Understanding the regulated inter- and intra-cellular metal circulation is one of the challenges in the field of metal homeostasis. Inside organisms metal ions are bound to organic ligands to prevent their uncontrolled reactivity and to increase their solubility. Nicotianamine (NA) is one of the important ligands. This non-proteinogenic amino acid is synthesized by nicotianamine synthase (NAS). NA is involved in mobilization, uptake, transport, storage, and detoxification of metals. Much of the progress in understanding NA function has been achieved by studying mutants with altered nicotianamine levels. Mild and strong Arabidopsis mutants impaired in nicotianamine synthesis have been identified and characterized, namely nas4x-1 and nas4x-2. Arabidopsis thaliana has four NAS genes. In this review, we summarize the structure and evolution of the NAS genes in the Arabidopsis genome. We summarize previous results and present novel evidence that the four NAS genes have partially overlapping functions when plants are exposed to Fe deficiency and nickel supply. We compare the phenotypes of nas4x-1 and nas4x-2 and summarize the functions of NAS genes and NA as deduced from the studies of mutant phenotypes.

  4. Heavy metals need assistance: The contribution of nicotianamine to metal circulation throughout the plant and the Arabidopsis NAS gene family

    Directory of Open Access Journals (Sweden)

    Petra eBauer

    2011-11-01

    Full Text Available Understanding the regulated inter- and intracellular metal circulation is one of the challenges in the field of metal homeostasis. Inside organisms metal ions are bound to organic ligands to prevent their uncontrolled reactivity and to increase their solubility. Nicotianamine (NA is one of the important ligands. This non-proteinogenic amino acid is synthesized by nicotianamine synthase (NAS. NA is involved in mobilization, uptake, transport, storage and detoxification of metals. Much of the progress in understanding NA function has been achieved by studying mutants with altered nicotianamine levels. Mild and strong Arabidopsis mutants impaired in nicotianamine synthesis have been identified and characterized, namely nas4x-1 and nas4x-2. Arabidopsis thaliana has four NAS genes. In this review, we summarize the structure and evolution of the NAS genes in the Arabidopsis genome. We summarize previous results and present novel evidence that the four NAS genes have partially overlapping functions when plants are exposed to Fe deficiency and nickel supply. We compare the phenotypes of nas4x-1 and nas4x-2 and summarize the functions of NAS genes and NA as deduced from the studies of mutant phenotypes.

  5. LAS PROTEÍNAS ARABINOGALACTANOS EN CULTIVOS DE CÉLULAS VEGETALES

    OpenAIRE

    Arianna Michelle Hernández Sánchez; Jacqueline Capataz Tafur; Mario Rodríguez-Monroy; Gabriela Sepúlveda Jiménez

    2009-01-01

    Las proteínas arabinogalactanos (AGPs) son macromoléculas que se encuentran prácticamente en todos los órganos de las plantas, siendo asociadas con varios aspectos del crecimiento y desarrollo vegetal. Estas moléculas se caracterizan bioquímicamente por contener carbohidratos y proteínas en relación 9:1. El carbohidrato está compuesto principalmente por arabinogalactanos tipo II; mientras que la parte proteica está organizada en dominios que definen a las AGPs como clásicas o no clásicas. Las...

  6. Actividad antitrombótica de proteínas de amaranto

    OpenAIRE

    Sabbione, Ana Clara

    2015-01-01

    Con el fin de obtener conocimientos que sirvan de aporte para futuros desarrollos de alimentos funcionales que contengan a las proteínas de amaranto como uno de sus ingredientes, en este trabajo nos hemos propuesto estudiar los aspectos básicos de la actividad antitrombótica de las proteínas de amaranto. Se estudiaron diversos protocolos de hidrólisis sobre los aislados proteicos de amaranto como una herramienta que nos permitiese generar distintos polipéptidos y péptidos activos. E...

  7. Effects of Mg doping on optical and electrical properties of GaNAs multiple quantum wells

    Energy Technology Data Exchange (ETDEWEB)

    Shiraga, Masahiro; Nakai, Yuko; Hirashima, Tomohiko; Kittaka, Akinobu; Ebisu, Mari; Tsurumachi, Noriaki; Nakanishi, Shunsuke; Miyagawa, Hayato; Itoh, Hiroshi; Koshiba, Shyun [Faculty of Engineering, Kagawa University, 2217-20 Hayashi-cho, Takamatsu, Kagawa 761-0396 (Japan); Takahashi, Naoshi [Faculty of Education, Kagawa University, 1-1 Saiwai-cho, Takamatsu, Kagawa 760-8521 (Japan); Noda, Takeshi [National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan); Ohmori, Masato [Toyota Technological Institute, 2-12-1 Hisakata, Tempaku-ku, Nagoya 468-8511 (Japan); Akiyama, Hidefumi [Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581 (Japan)

    2011-02-15

    We have evaluated the effects of Mg doping on the optical and the electrical property of GaNAs/GaAs multiple quantum wells (MQWs) with high N composition (11{proportional_to}17%) grown by radio-frequency molecular beam epitaxy (RF-MBE). The results of Van der Pauw measurements revealed strong n-type conduction by Mg doping. The blue-shifts and enhanced intensities in photoluminescence by Mg doping suggest the type-II band structure of GaNAs/GaAs MQWs and carrier generation by interstitial Mg atoms. (copyright 2011 EILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  8. Compositional dependence of the band gap in Ga(NAsP) quantum well heterostructures

    Energy Technology Data Exchange (ETDEWEB)

    Jandieri, K., E-mail: kakhaber.jandieri@physik.uni-marburg.de; Ludewig, P.; Wegele, T.; Beyer, A.; Kunert, B.; Springer, P.; Baranovskii, S. D.; Koch, S. W.; Volz, K.; Stolz, W. [Materials Science Center and Faculty of Physics, Philipps-University Marburg, Marburg (Germany)

    2015-08-14

    We present experimental and theoretical studies of the composition dependence of the direct band gap energy in Ga(NAsP)/GaP quantum well heterostructures grown on either (001) GaP- or Si-substrates. The theoretical description takes into account the band anti-crossing model for the conduction band as well as the modification of the valence subband structure due to the strain resulting from the pseudomorphic epitaxial growth on the respective substrate. The composition dependence of the direct band gap of Ga(NAsP) is obtained for a wide range of nitrogen and phosphorus contents relevant for laser applications on Si-substrate.

  9. Propiedades interfaciales y espumantes de proteínas y péptidos de amaranto

    OpenAIRE

    Bolontrade, Agustín Juan

    2016-01-01

    Este trabajo tuvo como objetivo general generar nuevos conocimientos que sirvan de base para el desarrollo de nuevos agentes tensioactivos derivados de amaranto. Se evaluó la incidencia que poseen cambios conformacionales de la estructura de proteínas y polipéptidos de reserva del grano de amaranto sobre su desempeño como posibles ingredientes tensioactivos, estudiando las propiedades de superficie de las proteínas de amaranto a nivel de interface y en el seno de la solución. El var...

  10. Nutrição mineral de mudas de pupunheira sob diferentes níveis de salinidade Mineral nutrition of peach palm seedlings under different salinity levels

    Directory of Open Access Journals (Sweden)

    Antonio Rodrigues Fernandes

    2002-11-01

    Full Text Available O potencial produtivo das plantas pode ser afetado por desordens nutricionais, induzidas pelo estresse salino. O objetivo deste trabalho foi estudar a influência de diferentes níveis de salinidade na nutrição mineral de mudas de pupunheira (Bactris gasipaes H.B.K., mediante o uso de solução nutritiva, em casa de vegetação. O experimento foi instalado em blocos ao acaso, com sete tratamentos e quatro repetições. Os tratamentos constaram das seguintes doses (mmol L-1: 0,0 de Na e 0,5 de Cl; 1,0 de Na e 0,5 de Cl (controle; e 5,0, 15,0, 30,0, 60,0 e 120,0 de NaCl. Os teores dos macronutrientes variaram em razão da salinidade, e verificou-se que o P e K apresentaram seus teores reduzidos nas raízes, o K e o Ca, nas folhas e o S, nas diferentes partes, enquanto o Na e o Cl apresentaram teores incrementados nas diferentes partes da planta. As relações Na/K, Na/Ca, Na/Mg, Cl/N, Cl/P e Cl/S aumentaram, causando um desbalanço nutricional na planta.The productive potential of plants may be affected by nutritional disorders induced by saline stress. The objective was to study the influence of different salinity levels on mineral nutrition of peach palm (Bactris gasipaes H.B.K. seedlings in greenhouse conditions with nutritive solution. The experimental design was in randomized blocks, with seven treatments and four replications. The treatments consisted of the following dosages (mmol L-1: 0.0 of Na and 0.5 of Cl; 1.0 of Na and 0.5 of Cl (control; and 5.0, 15.0, 30.0, 60.0 and 120.0 of NaCl. The content of the macronutrients varied with the salinity, there was reduction of P and K in the roots, K and Ca in the leaves, and S in different parts of the plants. Therefore, there was increase of Na and Cl in different parts of the plant. The enhancement of the ratios Na/K, Na/Ca, Na/Mg, Cl/N, Cl/P and Cl/S induced a nutritional imbalance in the plant.

  11. Influência da mineralogia da fração argila nas propriedades físicas de latossolos da região sudeste do Brasil

    Directory of Open Access Journals (Sweden)

    M. M. Ferreira

    1999-09-01

    Full Text Available Visando avaliar a influência da mineralogia da fração argila nas propriedades físicas de Latossolos do sudeste brasileiro, selecionaram-se sete Latossolos, representativos deste grupamento, ocorrentes nos estados de Minas Gerais e Espírito Santo, apresentando distintas feições morfológicas associadas à estrutura do solo. A amostragem dos solos foi efetuada no horizonte B latossólico, sendo retiradas amostras deformadas e indeformadas. No laboratório, foram efetuadas análises químicas, físicas e mineralógicas. Estudos de regressão e correlação levados a efeito com os resultados das diversas caracterizações mostraram que as propriedades físicas associadas à estrutura foram marcadamente influenciadas pela composição mineralógica da fração argila dos Latossolos. O efeito do Al sobre as propriedades físicas estudadas foi mais pronunciado do que o do Fe. Latossolos cauliníticos apresentaram maior densidade do solo, menor estabilidade de agregados em água, menor macroporosidade e menor permeabilidade quando comparados com Latossolos gibbsíticos. A permeabilidade dos Latossolos estudados aumentou com o teor de argila.

  12. Impact of mineral resource depletion

    CSIR Research Space (South Africa)

    Brent, AC

    2006-09-01

    Full Text Available In a letter to the editor, the authors comment on BA Steen's article on "Abiotic Resource Depletion: different perceptions of the problem with mineral deposits" published in the special issue of the International Journal of Life Cycle Assessment...

  13. ROCKS & MINERALS DETERMINATION AND ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    2015-01-01

    20150874Chen Haidong(Inner Mongolia Institute of Geological Survey and Mineral Exploration,Hohhot 010010,China);Li Jiao Zircon U-Pb Dating of the Hypersthene-Plagioclase Granulite in Liangcheng Area of Central Inner Mongolia and Its Geological Significance(Geology in China,ISSN1000-3657,CN11-1167/P,41(4),2014,p.1136-1142,

  14. ROCKS & MINERALS DETERMINATION AND ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    2015-01-01

    20152386 Hao Yuanfang(Shenyang Institute of Geology and Mineral Resources,CGS,Shenyang 110032,China);Xu Yingkui Determination of Calcium Oxide in Nickel Ores with EDTA Titration(Geology and Resources,ISSN1671-1947,CN21-1458/P,23(6),2014,p.580-582,2tables,6 refs.)

  15. ROCKS & MINERALS DETERMINATION AND ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    2013-01-01

    <正>20131550 Bai Jinfeng(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang 065000,China);Bo Wei Determination of 36Elements in Geochemical Samples by High Resolution Inductively Coupled Plasma-Mass Spectrometry(Rock and Mineral Analysis,ISSN0254-5357,CN11-2131/TD,31(5),2012,p.814

  16. ROCKS & MINERALS DETERMINATION AND ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    2005-01-01

    <正>20050704 Cheng Lin (Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039, China); Feng Songlin Analysis of Colored Elements in Ancient Colored Glaze by SRXRF (Rock and Mineral Analysis, ISSN0254-5357, CN11 -2131/TD, 23 (2), 2004, p. 113-116, 120, 3 illus. , 3 tables, 6 refs. )

  17. ROCKS & MINERALS DETERMINATION AND ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    2014-01-01

    <正>20142093Chen Daohua(Guangzhou Marine Geological Survey,Guangzhou 510075,China);Diao Shaobo The Latest Progress of Geological Marine Testing Technology in China(Rock and Mineral Analysis,ISSN0254-5357,CN11-2131/TD,32(6),2013,p.850-859,105refs.)Key words:chemical analysis,China

  18. ROCKS & MINERALS DETERMINATION AND ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    <正>20070252 Chen Meilan (Biological and Environmental College, Zhejiang Shuren University, Hangzhou 310015, China); Li Li Study on Adsorption of Phenol by Modified Organobentonite (Rock and Mineral Analysis, ISSN0254-5357, CN11-2131/TD, 24(4), 2005, p.259-261, 267, 6 illus., 1 table, 11 refs.) Key words: bentonite, benzene, adsorption

  19. Leptin and bone mineral density

    DEFF Research Database (Denmark)

    Morberg, Cathrine M; Tetens, Inge; Black, Eva;

    2003-01-01

    Leptin has been suggested to decrease bone mineral density (BMD). This observational analysis explored the relationship between serum leptin and BMD in 327 nonobese men (controls) (body mass index 26.1 +/- 3.7 kg/m(2), age 49.9 +/- 6.0 yr) and 285 juvenile obese men (body mass index 35.9 +/- 5.9 kg...

  20. ROCKS & MINERALS DETERMINATION AND ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    2016-01-01

    20160255 Wang Na(Tianjin Center of Geological Survey,China Geological Survey,Tianjin 300170,China);Teng Xinhua Determination of Low-Content Iron Carbonate in Stream Sediments by Flame Atomic Absorption Spectrometry with Aluminum Chloride Extraction(Rock and Mineral Analysis,ISSN0254-5357,CN11-2131/TD,34(2),2015,p.229

  1. KeyPathwayMinerWeb

    DEFF Research Database (Denmark)

    List, Markus; Alcaraz, Nicolas; Dissing-Hansen, Martin;

    2016-01-01

    We present KeyPathwayMinerWeb, the first online platform for de novo pathway enrichment analysis directly in the browser. Given a biological interaction network (e.g. protein-protein interactions) and a series of molecular profiles derived from one or multiple OMICS studies (gene expression...

  2. ROCKS & MINERALS DETERMINATION AND ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    2014-01-01

    <正>20140786Deng Zhenping(Institute of Karst Geology,Chinese Academy of Geological Sciences,Guilin 541004,China);Yang Wen-qiong Application of Stripping Voltammetry with a Solid Amalgam Electrode for Determination of Copper in a Tracer and Groundwater Tracing Experiment(Rock and Mineral Analy-

  3. Proceedings of XXIV international mineral processing congress

    Energy Technology Data Exchange (ETDEWEB)

    Wang Dianzuo; Sun Chuan Yao; Wang Fu Liang; Zhang Li Cheng; Han Long (eds.)

    2008-07-01

    Topics covered in volume 1 include applied mineralogy, comminution, classification, physical separation, flotation chemistry, sulphide flotation, non-sulphide flotation and reagent in mineral industry. Volume 2 covers processing of complex ores, processing of industrial minerals and coal, solid liquid separation, dispersion and aggregation, process simulation, expert systems and control of mineral processing, biohydrometallurgy, and mineral chemical processing. Volume 3 contains powder technology, mineral materials, treatment and recycling for solid wastes, waste water treatment, secondary resource recovery, soil remediation, concentrator engineering and process design, and application of mineral processing in related industry. It includes a CD-ROM of the proceedings.

  4. U.S. Geological Survey Mineral Resources Program—Mineral resource science supporting informed decisionmaking

    Science.gov (United States)

    Wilkins, Aleeza M.; Doebrich, Jeff L.

    2016-09-19

    The USGS Mineral Resources Program (MRP) delivers unbiased science and information to increase understanding of mineral resource potential, production, and consumption, and how mineral resources interact with the environment. The MRP is the Federal Government’s sole source for this mineral resource science and information. Program goals are to (1) increase understanding of mineral resource formation, (2) provide mineral resource inventories and assessments, (3) broaden knowledge of the effects of mineral resources on the environment and society, and (4) provide analysis on the availability and reliability of mineral supplies.

  5. Utilización de las proteínas séricas y caseínas como suplementos dietéticos para la prolongación del efecto de saciedad en mujeres obesas

    Directory of Open Access Journals (Sweden)

    Nadia Reyna

    Full Text Available Se estudió el consumo de tres tipos de suplementos, proteínas del lactosuero, caseínas y maltodextrinas (control en la disminución de la ingesta energética y prolongación del efecto de saciedad de 60 mujeres obesas. Después de 10 semanas, la reducción del peso corporal, IMC, % de grasa corporal y circunferencia de la cintura fue significativamente mayor (p < 0,001 en el grupo que consumió las proteínas lactoséricas frente a los otros dos grupos (control y caseínas. También se observa un descenso en la ingesta energética de -383 kcal/día en las mujeres que consumieron las proteínas de lactosuero frente a un descenso de -144 kcal/día en el grupo de caseínas y de tan solo -70 kcal/día en el grupo control. Finalmente la regulación del efecto de saciedad mediante escala visual analógica fue también más efectiva en el caso de las proteínas séricas, que en el caso de las caseínas y maltodextrinas.

  6. Aggregate and Mineral Resources - INDUSTRIAL_MINERALS_POINTS_IN: Industrial Mineral Data in Indiana (Indiana Geological Survey, Point Shapefile)

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — INDUSTRIAL_MINERALS_POINTS_IN is a shapefile that shows the distribution of stratigraphic data for various industrial minerals in Indiana. These data were derived...

  7. A thermo-mechanical stress prediction model for contemporary planar sodium sulfur (NaS) cells

    Science.gov (United States)

    Jung, Keeyoung; Colker, Jeffrey P.; Cao, Yuzhe; Kim, Goun; Park, Yoon-Cheol; Kim, Chang-Soo

    2016-08-01

    We introduce a comprehensive finite-element analysis (FEA) computational model to accurately predict the thermo-mechanical stresses at heterogeneous joints and components of large-size sodium sulfur (NaS) cells during thermal cycling. Quantification of the thermo-mechanical stress is important because the accumulation of stress during cell assembly and/or operation is one of the critical issues in developing practical planar NaS cells. The computational model is developed based on relevant experimental assembly and operation conditions to predict the detailed stress field of a state-of-the-art planar NaS cell. Prior to the freeze-and-thaw thermal cycle simulation, residual stresses generated from the actual high temperature cell assembly procedures are calculated and implemented into the subsequent model. The calculation results show that large stresses are developed on the outer surface of the insulating header and the solid electrolyte, where component fracture is frequently observed in the experimental cell fabrication process. The impacts of the coefficients of thermal expansion (CTE) of glass materials and the thicknesses of cell container on the stress accumulation are also evaluated to improve the cell manufacturing procedure and to guide the material choices for enhanced thermo-mechanical stability of large-size NaS cells.

  8. Room-temperature electron spin amplifier based on Ga(In)NAs alloys.

    Science.gov (United States)

    Puttisong, Yuttapoom; Buyanova, Irina A; Ptak, Aaron J; Tu, Charles W; Geelhaar, Lutz; Riechert, Henning; Chen, Weimin M

    2013-02-06

    The first experimental demonstration of a spin amplifier at room temperature is presented. An efficient, defect-enabled spin amplifier based on a non-magnetic semiconductor, Ga(In)NAs, is proposed and demonstrated, with a large spin gain (up to 2700% at zero field) for conduction electrons and a high cut-off frequency of up to 1 GHz.

  9. ANALISA EFEKTIFITAS PENGGUNAAN NETWORK RESOURCE ANTARA STORAGE AREA NETWORK (SAN DAN NETWORK ATTACHED STORAGE (NAS

    Directory of Open Access Journals (Sweden)

    Lekso Budi Handoko

    2015-05-01

    Full Text Available Server yang melayani sebuah fungsi akan menyimpan data yang dimilikinya pada media penyimpanan secara lokal di tiap server itu sendiri. Namun dengan semakin meningkatnya penggunaan, cara ini menghadapi beberapa permasalahan, yaitu tidak efisien, tidak scalable, dan tidak dapat dikelola dengan mudah. Oleh karena itu, perlu mempergunakan sistem media penyimpanan external terpusat bagi seluruh layanan. Tujuan dari paper hasil penelitian dan analisis ini adalah memberikan perbandingan konsep penyimpanan data terpusat dengan Storage Area Network (SAN dan Network Attached Storage (NAS. Dimana yang dibandingkan adalah kecepatan baca dan tulis dari kedua konsep penyimpanan tersebut berkaitan dengan pemanfaatan network resource. Perbandingan ini akan memberikan referensi mengenai penyimpanan data terpusat mana yang paling efektif antara SAN dan NAS dalam menggunakan network resouce. Metode pengumpulan data yang digunakan yaitu menggunakan studi literatur dan studi kasus terhadap kedua konsep penyimpanan tersebut. Studi literatur dengan mencari referensi-referensi yang berkaitan dengan tema. Mengumpulkan data dan mencari kajian pustaka yang berkaitan. Dari hasil penelitian dan analisa maka dapat ditarik kesimpulan, ternyata setelah dilakukan pengujian dapat dikatakan bahwa terdapat perbandingan antara kecepatan baca dan tulis SAN dan NAS. Oleh karena itu didapatkan SAN adalah yang paling efektif dalam memanfaatkan network resource dan efisien dalam proses baca dan tulis pada storage server. Kata Kunci: Jaringan, Penyimpanan Data Terpusat, SAN, NAS, Storage Server.

  10. 1.3~1.55 m GAInNAsSb Lasers

    Institute of Scientific and Technical Information of China (English)

    James S. Harris

    2003-01-01

    The realization of long wavelength lasers on GaAs provides the opportunity to produce both much lower cost vertical cavity lasers and high power lasers. Results of work on the GaInNAsSb system to realize such lasers are described.

  11. 1.3~1.55μm GAInNAsSb Lasers

    Institute of Scientific and Technical Information of China (English)

    James; S.; Harris

    2003-01-01

    The realization of long wavelength lasers on GaAs provides the opportunity to produce both much lower cost vertical cavity lasers and high power lasers. Results of work on the GaInNAsSb system to realize such lasers are described.

  12. UAS Integration in the NAS Project: Integrated Test and LVC Infrastructure

    Science.gov (United States)

    Murphy, Jim; Hoang, Ty

    2015-01-01

    Overview presentation of the Integrated Test and Evaluation sub-project of the Unmanned Aircraft System (UAS) in the National Airspace System (NAS). The emphasis of the presentation is the Live, Virtual, and Constructive (LVC) system (a broadly used name for classifying modeling and simulation) infrastructure and use of external assets and connection.

  13. Consistency of TTO-NAS inorganic carbon data with modern measurements

    Science.gov (United States)

    Tanhua, Toste; Wallace, Douglas W. R.

    2005-07-01

    We compare alkalinity and total dissolved inorganic carbon (DIC) measurements made during the Transient Tracers in the Ocean, North Atlantic Study (TTO-NAS) in 1981 with modern measurements from a TTO reoccupation cruise in 2004 (M60/5). We find that the TTO-NAS alkalinity values are 3.6 +/- 2.3 μmol kg-1 higher than modern alkalinity data tied to Certified Reference Materials. The TTO-NAS DIC values re-calculated from original alkalinity and discrete-pCO2 data using currently accepted constants are 3.8 μmol kg-1 higher than those reported in the revised TTO data set. This difference is reduced to 0.7 μmol kg-1 when our suggested correction to the TTO-NAS alkalinity is applied. These re-calculated DIC values are 2.4 μmol kg-1 too low relative to contemporaneous measurements made by the vacuum extraction/manometric Certified method. Application of this correction brings the TTO data into almost perfect agreement with modern measurements for slowly-ventilated deep water of the eastern Atlantic.

  14. Producción de proteínas recombinantes en Bacillus megaterium: estado del arte

    OpenAIRE

    Keyla Tortoló-Cabañas; Antonio Bell-García

    2015-01-01

    Se recoge una actualización del estado del arte del uso de Bacillus megaterium como hospedero para la expresión de proteínas recombinantes, las características de este microorganismo, así como las consideraciones generales y algunos aspectos a tener en cuenta.

  15. Environmental Assessment for EOD Stand-Up at NAS Fort Worth JRB

    Science.gov (United States)

    2012-03-01

    herbaceous, frequently mowed, lawn areas (NAS Fort Worth JRB, 2004a). These areas provide minimal habitat value for native species of flora and fauna...Jacinto Austin, TX 78701 Mark Wolfe State Historic Preservation Officer Texas Historical Commission 1511 Colorado Austin, TX 78701 Local

  16. Iraagi peaminister tänas Eestit abi eest / Toivo Tootsen

    Index Scriptorium Estoniae

    Tootsen, Toivo, 1943-

    2006-01-01

    Välisminister Urmas Paeti kohtumisest Iraagi peaministri Nuri al-Malikiga, mille käigus tänas peaminister Eestit osutatud abi eest ning rõhutas Iraagi iseseisvumisprotsessi tähtsust, mille saavutamisel on oluline roll ka koalitsioonivägedel

  17. Devassa da vida privada dos índios coloniais nas vilas de El Rei

    Directory of Open Access Journals (Sweden)

    Resende, Maria Leônia Chaves de

    2004-01-01

    Full Text Available Este artigo trata da vivência de índios e/ou seus descendentes, de diversas procedências étnicas que desterrados de suas aldeias, passaram a viver nas vilas de Minas Gerais, no século XVIII

  18. Sobre trote, vampiros e relacionamento humano nas escolas médicas

    Directory of Open Access Journals (Sweden)

    Maria Cristina Pereira Lima

    Full Text Available Os relacionamentos dos estudantes entre si e destes com seus professores podem se tornar difíceis em diferentes momentos. O ingresso na universidade parece ser um período especialmente tenso em função dos trotes sofridos nesta fase da vida acadêmica. Este estudo apresenta uma revisão da literatura a respeito do trote, em especial aquele realizado nas escolas médicas, tentando identificar as características ritualísticas e os fatores mantenedores deste. Paralelamente, constrói uma metáfora com o mito do vampiro, propondo esta lenda como um paradigma para compreender as relações humanas nas faculdades de Medicina. São discutidas as características comuns entre vampiros e vítimas, encontradas no mito e nas inter-relações presentes nas escolas médicas, abordando-se possíveis estratégias de manejo.

  19. Minería de datos con Oracle Data Miner

    OpenAIRE

    Fernández Ruiz, Benjamín

    2016-01-01

    La intención del proyecto es mostrar las diferentes características que ofrece Oracle en el campo de la minería de datos, con la finalidad de saber si puede ser una plataforma apta para la investigación y la educación en la universidad. En la primera parte del proyecto se estudia la aplicación “Oracle Data Miner” y como, mediante un flujo de trabajo visual e intuitivo, pueden aplicarse las distintas técnicas de minería (clasificación, regresión, clustering y asociación). Para mostrar la ej...

  20. Productivity and accumulation of nutrients in plants of jambu, under mineral and organic fertilizationProdutividade e acúmulo de nutrientes em plantas de jambu, sob adubação orgânica e mineral

    Directory of Open Access Journals (Sweden)

    Luciana da Silva Borges

    2013-03-01

    objetivo desse trabalho foi analisar a biomassa, acúmulo de nutrientes, a produtividade e determinar o resíduo de agrotóxico em plantas de jambu quando cultivado sob adubação orgânica e mineral. O experimento foi conduzido na Fazenda Experimental São Manuel, FCA/UNESP. O delineamento estatístico foi em blocos casualizados, com esquema fatorial (2 x 6, sendo duas fontes de adubação (orgânica e mineral e seis doses de nitrogênio, com quatro repetições. As características avaliadas foram alturas de plantas, massas frescas e secas de folhas, produtividade e acúmulo de nutrientes. A adubação mineral proporcionou maior biomassa, produtividade e acúmulo de N, P e K em relação à adubação orgânica utilizada. Preconiza-se a dose de 90g m-2 de uréia como adequada para obtenção desses resultados. Com tudo a adubação orgânica favoreceu ao acúmulo de P nas plantas de jambu em relação à adubação mineral, sendo a dose de 10 kg m-2 de esterco de curral recomendada para conseguir esse resultado nas plantas de jambu. Não foi detectada a presença de agrotóxicos fosforados e carbamatos em folhas de plantas jambu sob adubação orgânica e mineral. No entanto, foi observada a presença de clorados nas folhas nas duas adubações utilizada.

  1. Aprendizagem situada, participação e legitimidade nas práticas de trabalho.

    Directory of Open Access Journals (Sweden)

    Lucas Socoloski Gudolle

    2012-02-01

    Full Text Available O presente estudo tem por objetivo identificar e analisar o processo de aprendizagem situada a partir da participação e legitimidade nas práticas dos grupos de trabalho da Dublin Irish Pub. O arcabouço teórico envolve a aprendizagem situada, aprofundada junto com o estudo da participação periférica legitimada e diferentes níveis de participação nas práticas de trabalho dos grupos de trabalho. Com base no método qualitativo básico, a coleta de dados ocorreu por observação direta, diário de campo, entrevistas em profundidade. O período de observação de seis meses totalizou 32 idas a campo e oito entrevistas realizadas na empresa estudada. Assim, por meio da análise interpretativista, as informações da pesquisa permitem elucidar de que maneira a participação e legitimidade nas práticas de trabalho podem auxiliar na aprendizagem. Entre os resultados encontrados no estudo, destacam-se as formas de aprendizagem situada que surgiram em três grupos: garçons, barmen e cozinha. Descrevendo de forma analítica o engajamento e participação dos aprendizes nas práticas de trabalho e nas comunidades de prática, argumenta-se, com base neste trabalho, que esse processo de atuação nas comunidades de prática passa pela fase inicial de participação periférica legitimada, já que, a partir do engajamento e da atuação com os mais experientes, desenvolve-se a aprendizagem. Além disso, os ganhos de legitimidade e pertencimento são elementos relevantes no processo de aprendizagem, e pode-se identificar que o processo de aprendizagem situada não ocorre somente em comunidades de prática e que o pertencimento e a participação periférica legitimada são características a serem fomentadas nas organizações. A partir da negociação e renegociação de significados, pelo estabelecimento de relacionamentos sociais e comunidades de prática, cria-se um sistema por meio do qual os modos de ver, interpretar, compreender e praticar

  2. Estabilidad de emulsiones preparadas con proteínas de sueros de soja

    Directory of Open Access Journals (Sweden)

    Jorge Wagner

    2011-12-01

    Full Text Available Por precipitación con acetona en frio, se obtuvieron muestras de proteínas aisladas de dos sueros de soja, el suero SS proveniente de la obtención de aislados de soja y el suero de tofu ST. A partir del SS y del mismo suero previamente liofilizado y calentado (SSLC se obtuvieron las proteínas denominadas PSS y PSSLC, respectivamente; a partir de ST se preparó la muestra PST. El objetivo del trabajo fue analizar la estabilidad de emulsiones o/w preparadas con las proteínas de sueros de soja en forma comparativa con un aislado de soja nativo (ASN. Las emulsiones se prepararon por homogeneización de dispersiones proteicas (0,1–1,0 % p/v en buffer fosfato 10 mM pH 7 y aceite de girasol (Φmásico=0,33, empleando un Ultraturrax T-25. La estabilidad fue evaluada por medida del aceite separado, distribución de tamaño de partículas (por difracción láser y los grados de cremado y coalescencia evaluados a través de perfiles de BackScattering. Se observó que en todas las concentraciones ensayadas las emulsiones preparadas con proteínas aisladas (por precipitación con acetona en frío de suero de tofu tratado térmicamente (PST tenían una estabilidad comparable a la de emulsiones preparadas con ASN. Se halló una estabilidad menor en emulsiones con proteínas nativas de suero de soja (PSS obtenido en laboratorio no tratado térmicamente. Las proteínas obtenidas de este suero liofilizado y calentado (PSSLC exhibieron una mejor capacidad emulsionante. Los resultados mostraron que las proteínas de sueros de soja presentan buenas propiedades emulsionantes y estabilizantes dependientes del grado de desnaturalización y glicosilación alcanzado.

  3. ANÁLISIS GENÓMICO-FUNCIONAL DE PROTEÍNAS CON DOMINIOS TIR EN YUCA

    Directory of Open Access Journals (Sweden)

    VERÓNICA ROMÁN REYNA

    2012-01-01

    Full Text Available Dentro de las proteínas implicadas en inmunidad de plantas y animales se encuentran aquellas que poseen un dominio TIR (Toll Interleukin Receptor. El objetivo de este trabajo fue realizar un análisis genómico global de las proteínas que presentan un dominio TIR en yuca y discernir su posible función en la resistencia a la bacteriosis vascular. En el proteoma de yuca se logró identificar 46 proteínas con dominios TIR, los cuales fueron divididos en cuatro categorías según la presencia o no de otros dominios: TIR (T, TIR- NB (TN, TIR-LRR (TL y TIR-NB-LRR (TNL. El 56,5 % de las 46 proteínas corresponde a la categoría TNL. Mediante alineamientos múltiples se encontró que no todos los do- minios TIR de yuca presentan la región aE implicada en la dimerización y activación de las respuestas de inmunidad. Tres de las cuatro categorías de proteínas (T, TNL y TN presentan un mayor número de sustituciones sinónimas, sugiriendo que no están implicadas en procesos de reconocimiento. Por medio de doble híbrido de levadura y agroinfiltración se analizaron dos dominios TIR que no presentan la región aE, encontrando que ambos son capaces de formar homo y heterodímeros pero no desencadenan respuestas de defensa. Con este trabajo se pudo concluir que algunas proteínas que poseen dominios TIR pueden funcionar como adaptadores en la transducción de la señal con otras proteínas de resistencia. Además, se puso en evidencia que no siempre la región aE es importante para la dimerización, pero sí para activar las señales de respuestas de defensa.

  4. 76 FR 57690 - TRICARE; Elimination of the Non-Availability Statement (NAS) Requirement for Non-Emergency...

    Science.gov (United States)

    2011-09-16

    ... of the Secretary 32 CFR Part 199 RIN 0720-AB52 TRICARE; Elimination of the Non-Availability Statement (NAS) Requirement for Non-Emergency Inpatient Mental Health Care AGENCY: Office of the Secretary... states a NAS is needed for non-emergency inpatient mental health care in order for a TRICARE Standard...

  5. Mineral operations outside the United States

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Mineral facilities and operations outside the United States compiled by the National Minerals Information Center of the USGS. This representation combines source...

  6. Characterization of biological mineralization in vitro

    NARCIS (Netherlands)

    Huitema, L.F.A.

    2006-01-01

    Mineralization is an essential requirement for normal skeletal development, which is generally accomplished through the function of two cell types, osteoblasts and chondrocytes. Soft tissues do not mineralize under normal conditions, but under certain pathological conditions some tissues like articu

  7. Miscellaneous Industrial Minerals Operations - Direct Download

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This map layer includes miscellaneous industrial minerals operations in the United States. The data represent commodities covered by the Minerals Information Team...

  8. Studies of mineralization in South African rivers

    CSIR Research Space (South Africa)

    Hall, GC

    1978-03-01

    Full Text Available Several South African rivers are polluted by mineral salts of diffuse source. This pollution can be related to geological phenomena and to irrigation practices. Mineralization is problematic in that it can render surface waters unsuitable...

  9. ARC Code TI: sequenceMiner

    Data.gov (United States)

    National Aeronautics and Space Administration — The sequenceMiner was developed to address the problem of detecting and describing anomalies in large sets of high-dimensional symbol sequences. sequenceMiner works...

  10. Mineral Operations of Latin America and Canada

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — This data set consists of records for over 900 mineral facilities in Latin America and Canada. The mineral facilities include mines, plants, smelters, or refineries...

  11. SST Image Blind Restoration Based on SIMO and NAS-RIF%基于SIMO和NAS-RIF的SST图像盲恢复

    Institute of Scientific and Technical Information of China (English)

    仲伟波; 金声震; 宁书年

    2006-01-01

    图像恢复是太空太阳望远镜图像处理的重要组成部分,针对SST的多通道太阳观测的特点,将SIMO模型引入到SST图像恢复中,根据SST图像的特点,给出了基于SIMO和NAS-RIF的多通道盲恢复算法.仿真结果表明,该方法对SST图像恢复具有较好的适应性.

  12. APPLICATION OF MICROBIAL TECHNOLOGY TO MINERAL PROCESSING

    Institute of Scientific and Technical Information of China (English)

    2000-01-01

    The application of microbial technology to mineral processing has been reviewed with respect to the bioleaching of metals from minerals, the influence of biotreatment on flotation, the biobene ficiation of nonmetallic minerals, and the biotreatment for mine waste reclamation.The application of microbial technology to mineral processing has shown the advantages of high efficiency, low energy and reagent consumption, low capital and operating costs, and low pollution of the environment.

  13. Bolter miners for longwall development

    Energy Technology Data Exchange (ETDEWEB)

    Leeming, J.; Flook, S. [Joy Mining Machinery Ltd., Nottingham (United Kingdom); Altounyan, P. [Rock Mechanics Technology Ltd., Derby (United Kingdom)

    2001-11-08

    Rapid entry drivage systems are now being applied in European mining conditions with major advantages, not only in terms of drivage rates, costs and longwall productivity, but also with improved safety. This is being achieved through the introduction of bolter miner systems in which the early installation of high strength rockbolts is fully integrated with the drivage system and all ancillary operations. These new systems are fully described with examples of applications in European conditions and procedures for design of rockbolt patterns. (orig.) [German] Schnelle Streckenvortriebssysteme, die jetzt unter typisch europaeischen Bergbaubedingungen eingefuehrt werden, bringen grosse Vorteile, nicht nur hinsichtlich einer Verbesserung der Vortriebsgeschwindigkeiten, Auffahrkosten und Strebleistungen, sondern auch aufgrund des erhoehten Sicherheitsniveaus. Der Erfolg dieses Vortriebsverfahrens kann auf die Einfuehrung des Bolter Miner Systems zurueckgefuehrt werden. (orig.)

  14. Borate Minerals and RNA Stability

    Directory of Open Access Journals (Sweden)

    Ernesto Di Mauro

    2010-08-01

    Full Text Available The abiotic origin of genetic polymers faces two major problems: a prebiotically plausible polymerization mechanism and the maintenance of their polymerized state outside a cellular environment. The stabilizing action of borate on ribose having been reported, we have explored the possibility that borate minerals stabilize RNA. We observe that borate itself does not stabilize RNA. The analysis of a large panel of minerals tested in various physical-chemical conditions shows that in general no protection on RNA backbone is exerted, with the interesting exception of ludwigite (Mg2Fe3+BO5. Stability is a fundamental property of nucleic polymers and borate is an abundant component of the planet, hence the prebiotic interest of this analysis.

  15. Mineral bridges in nacre revisited

    CERN Document Server

    Checa, Antonio G; Willinger, Marc-Georg

    2012-01-01

    We confirm with high-resolution techniques the existence of mineral bridges between superposed nacre tablets. In the towered nacre of both gastropods and the cephalopod Nautilus there are large bridges aligned along the tower axes, corresponding to gaps (150-200 nm) in the interlamellar membranes. Gaps are produced by the interaction of the nascent tablets with a surface membrane that covers the nacre compartment. In the terraced nacre of bivalves bridges associated with elongated gaps in the interlamellar membrane (> 100 nm) have mainly been found at or close to the edges of superposed parental tablets. To explain this placement, we hypothesize that the interlamellar membrane breaks due to differences in osmotic pressure across it when the interlamellar space below becomes reduced at an advanced stage of calcification. In no cases are the minor connections between superimposed tablets (< 60 nm), earlier reported to be mineral bridges, found to be such.

  16. ROCKS & MINERALS DETERMINATION AND ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    <正>20101621 Chen Heping (Nanyang Geology Testing & Research Center of Henan Province, Nanyang 473000, China); Sha Yanmei Simultaneous Determination of Major and Minor Elements in Carbonates by Inductively Coupled Plasma-Atomic Emission Spectrometry with Multi-direction Viewing Mode (Rock and Mineral Analysis, ISSN0254-5357, CN11-2131/TD, 28(4), 2009, p.367-369, 5 tables, 10 refs.)

  17. ROCKS & MINERALS DETERMINATION AND ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    <正>20070970 Cheng Jian(Center of Analysis and Testing,Hunan Zhuye Torch Metals Co., Ltd.,Zhuzhou 412004,China)Direct Deter- mination of Lead in Refined Indium by Flume Atomic Absorption Spectrometry (Rock and Mineral Analysis,ISSN 0254- 5357,CN11-2131/TD,25(1),2006,p.91 -92,94,1 illus.,7 tables,5 refs.) Key words:lead,atomic absorption

  18. Metabolismo mineral em bubalinos com ingestões de diferentes níveis de fósforo Mineral metabolism in buffaloes fed different phosphorus levels

    Directory of Open Access Journals (Sweden)

    Nedilse Helena de Souza

    2009-06-01

    Full Text Available Objetivou-se avaliar os efeitos da ingestão diária de quatro níveis de fósforo (8, 12, 15 e 18 g sobre o metabolismo de macrominerais (P, Ca, Mg, Na, K e S, incluindo a ingestão, a concentração no rúmen, a taxa de passagem do líquido ruminal, a excreção nas fezes e a disponibilidade aparente. Utilizaram-se quatro bubalinos adultos com fístulas ruminais em delineamento quadrado latino (4 × 4 com dieta total constituída de cana-de-açúcar como volumoso (85% e concentrado formulado com um dos níveis de fósforo. Os níveis de fósforo não ocasionaram diferença significativa na concentração mineral no rúmen de nenhum mineral estudado. A concentração média de fósforo no conteúdo ruminal foi de 0,98% na matéria seca, enquanto o teor de fósforo nas rações variou de 0,12 a 0,34%, comprovando alta reciclagem de fósforo pela saliva. Níveis crescentes de fósforo na dieta, variando de 8 a 18 g/animal/dia, não influenciam as disponibilidades de cálcio e magnésio. Com o nível de fósforo de 15 g/dia, houve melhor utilização do fósforo da dieta. A ingestão de níveis crescentes de fósforo em g/kg0,75 (X promoveu aumento linear na excreção fecal desse mineral em g/kg0,75 (Y e baixos valores de disponibilidade do fósforo, que pode ser estimado pela equação Y = 0,03 + 0,610X, o que indica deficiência desse elemento mineral na dieta para o metabolismo animal.The objective was to evaluate the effects of daily intake of four levels of phosphorus (8, 12, 15 and 18 g on the metabolism of macro minerals (Ca, P, Mg, Na, K and S, including the intake, concentration in rumen, ruminal fluid passage rate, excretion in feces and apparent availability. Four rumen-fistulated buffaloes were allotted to a 4 × 4 Latin Square, with total diet composed by sugar cane as forage (85% and concentrate formulated for each different phosphorus levels. Phosphorus levels did not caused difference in mineral concentration in the rumen of any

  19. ROCKS & MINERALS DETERMINATION AND ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    <正>20122362 Cai Shuwei ( Nanjing Institute of Geology and Mineral Resources,Nanjing 210016,China );Zhu Jiaping Evaluating on Uncertainty of Determination of Manganese Contents in Groundwater by Inductively Coupled Plasma Atomic Emission Spectrometry ( Resources Survey & Environment,ISSN1671-4814,CN32-1640 / N,32 ( 4 ), 2011,p.307-310,2tables,8refs. ) Key words:inductively coupled plasma atomic emission spectroscopy,manganese

  20. Raising Environmental Awareness among Miners in Iran

    Science.gov (United States)

    Mozaffari, Ezatollah

    2013-01-01

    Generation of waste is inevitable but controllable in minerals industry. The aim of this research is to find ways for raising environmental awareness among miners. Miners' attitude towards environmental mining has been investigated. A survey has been done collecting mine managers' point of view coupled with current trend on mine waste management…

  1. Mineralization potential of polarized dental enamel.

    Directory of Open Access Journals (Sweden)

    Reina Tanaka

    Full Text Available BACKGROUND: Management of human teeth has moved from a surgical to a more conservative approach of inhibiting or preventing lesion progression. Increasing enamel mineralization is crucial in this regard. A potential difficulty is the preferential mineralization of the outermost portion of the enamel that can prevent overall mineralization. We describe a strategy for increasing the mineralization potential of dental enamel. METHODOLOGY/PRINCIPAL FINDINGS: Extracted human premolar teeth enamel (n = 5 were exposed to a high concentration of hydrogen peroxide with an energizing source. Samples were stored in artificial saliva at 37 degrees C for 1 wk. A desktop X-ray micro-CT system was used to evaluate the mineral density of samples. Mineral distribution was polarized between the lower and the higher mineralized portion of enamel by charged oxygen free radicals due to activation of permeated hydrogen peroxide. The kinetics of energy absorption in the deeper enamel region demonstrated improvement of preferential mineralization into the region without restricting overall mineralization of the enamel. Subsequent increasing mineralization, even in the dense mineralized outer portion of enamel, was also achieved. CONCLUSIONS/SIGNIFICANCE: This increased mineralization may promote resistance to acidic deterioration of the structure. The present study is one of the primary steps towards the development of novel application in reparative and restorative dentistry.

  2. Mineral zircon : A novel thermoluminescence geochronometer

    NARCIS (Netherlands)

    Van Es, HJ; Vainshtein, DI; De Meijer, RJ; Den Hartog, HW; Donoghue, JF; Rozendaal, A

    2002-01-01

    Mineral zircon contains trace amounts (typically 10-1000 ppm) of the alpha-emitters uranium and thorium, which irradiate this mineral internally. This outstanding feature of zircon turns out to be extremely useful when this mineral is applied as a thermoluminescence (TL) dating medium, because the b

  3. Sorption of pesticides to aquifer minerals

    DEFF Research Database (Denmark)

    Clausen, Liselotte; Fabricius, Ida Lykke

    2000-01-01

    This paper summarizes results from a work were the sorption of five pesticides on seven minerals were studied in order to quantify the adsorption to different mineral surfaces. Investigated mineral phases are: quartz, calcite, kaolinite, a-alumina, and three iron oxides (2-line ferrihydrite, goet...

  4. 43 CFR 8.5 - Mineral rights.

    Science.gov (United States)

    2010-10-01

    ... 43 Public Lands: Interior 1 2010-10-01 2010-10-01 false Mineral rights. 8.5 Section 8.5 Public... INTERIOR AND OF THE ARMY RELATIVE TO RESERVOIR PROJECT LANDS § 8.5 Mineral rights. Mineral, oil and gas rights will not be acquired except where the development thereof would interfere with project...

  5. Is Struvite a Prebiotic Mineral?

    Directory of Open Access Journals (Sweden)

    Matthew A. Pasek

    2013-04-01

    Full Text Available The prebiotic relevance of mineral struvite, MgNH4PO4·6H2O, was studied experimentally as a phosphorylating reagent and, theoretically, to understand the geochemical requirements for its formation. The effectiveness of phosphorylation by the phosphate mineral, monetite, CaHPO4, was also studied to compare to the efficiency of struvite. The experiments focused on the phosphorylation reactions of the minerals with organic compounds, such as nucleosides, glycerol and choline chloride, and heat at 75 °C for about 7–8 days and showed up to 28% phosphorylation of glycerol. In contrast, the compositional requirements for the precipitation of struvite are high ammonium and phosphate concentrations, as well as a little Ca2+ dissolved in the water. Combined, these requirements suggest that it is not likely that struvite was present in excess on the early Earth to carry out phosphorylation reactions. The present study focuses on the thermodynamic aspects of struvite formation, complementing the results given by Orgel and Handschuh (1973, which were based on the kinetic effects.

  6. Is Struvite a Prebiotic Mineral?

    Science.gov (United States)

    Gull, Maheen; Pasek, Matthew A.

    2013-01-01

    The prebiotic relevance of mineral struvite, MgNH4PO4·6H2O, was studied experimentally as a phosphorylating reagent and, theoretically, to understand the geochemical requirements for its formation. The effectiveness of phosphorylation by the phosphate mineral, monetite, CaHPO4, was also studied to compare to the efficiency of struvite. The experiments focused on the phosphorylation reactions of the minerals with organic compounds, such as nucleosides, glycerol and choline chloride, and heat at 75 °C for about 7–8 days and showed up to 28% phosphorylation of glycerol. In contrast, the compositional requirements for the precipitation of struvite are high ammonium and phosphate concentrations, as well as a little Ca2+ dissolved in the water. Combined, these requirements suggest that it is not likely that struvite was present in excess on the early Earth to carry out phosphorylation reactions. The present study focuses on the thermodynamic aspects of struvite formation, complementing the results given by Orgel and Handschuh (1973), which were based on the kinetic effects. PMID:25369744

  7. [Legal aspects of mineral waters].

    Science.gov (United States)

    Callipo, C

    1976-01-01

    The Author takes up the subject of the report in order to carry out a comprehensive legal recognition of the mineral water regulations in Italy and emphasizes that in this field the results of scientific conclusions, or rather of the various scientific branches (medical hydrology, microbiology, chemics, hydrogeology, medical clinics, pharmacology, etc.) supply a cognitive support to the legislator and the substantial contents to the legal standards. He therefore illustrates the two main outlines of the rules, i.e. the hygienic sanitary one and the mineral one: such lay-out is subsequently related to the implementation of the Regions on one hand and to the enforcement of CEE-rules on the other. This has led to the fact that the hygienic-sanitary legislation was confirmed to the State while the mineral one was transferred to the Regions. After having shown up contrasts and expressed the necessity of clearness and uniformity of rules and criteria, the Author connects these requirements mainly with the implementation of hygienic-sanitary surveillance and consequently with the evaluation of the banal bacterical contents under the point of view of merit--i.e. the rules should include the probative results of science--as well as from a point of view of coordinated allotments of competence by the various organisms.

  8. Mineral Status of Myocardial Sarcocystosis

    Directory of Open Access Journals (Sweden)

    GA Kojouri

    2011-06-01

    Full Text Available Background: The role of minerals on parasite persistency and the interaction between minerals and animal responses to the parasite infestation is not clear. For these reasons, the present re­search was aimed to compare copper, zinc and iron status in sheep with parasitic myocarditis and healthy ones in 2009.Methods: Blood and heart tissue samples were collected from 145 slaughtered sheep and histopa­thological findings were confirmed as myocardial sarcocystosis in 27 cases. Serum and tis­sue mineral level were determined by atomic absorption spectroscopy. Data were analyzed by Sig­mastat program, using One Way Analysis of Variance (ANOVA at the level of P<0.05.Results: Myocardial sarcocystosis significantly increase myocardial concentration of Cu, Zn and Fe (P<0.05.Conclusion: These findings may explain the role of copper, zinc and iron in parasite persistency and may discuss the pathogenesis of sarcocystosis, which relates to evocate mentioned micronutri­ent to cardiac muscle.

  9. [Bone mineral density and adequacy of dietary pattern of patients with chronic kidney disease in hemodialysis].

    Science.gov (United States)

    Carrasco, Fernando; Cano, Marcelo; Camousseigt, Jean; Rojas, Pamela; Inostroza, Jorge; Torres, Rubén

    2013-01-01

    Introducción: La desnutrición es común en la enfermedad renal crónica (ERC), junto a una menor masa muscular y densidad mineral ósea (DMO), aumentando el riesgo de morbilidad. Objetivo: Comparar la composición corporal (CC), DMO y el contenido mineral óseo (CMO) entre pacientes con ERC y sujetos sanos, relacionándolos con ingesta energética, de macro y micronutrientes. Métodos: Se evaluó CC en 30 pacientes en hemodiálisis y 28 voluntarios sanos con DEXA. Los pacientes llenaron tres registros de 24 horas de ingesta alimentaria. Resultados: Los pacientes con ERC presentaron una menor DMO (p grasa (MLG) que los controles (p = 0,06). En los hombres, las diferencias en la DMO y CMO pierden significación al ajustar por masa grasa (%) y MLG (kg). En los pacientes con ERC, un 34,5% y 27,6% tuvo una ingesta adecuada de energía y proteínas, respectivamente. Sin embargo, se observó un déficit de la ingesta de energía y proteínas en 31,0% y 44,8% de los pacientes, respectivamente. No se encontró correlación en los pacientes con ERC entre la ingesta de macronutrientes y de calcio y DMO o CMO. Conclusiones: Los pacientes con ERC tienen menor DMO y CMO que los voluntarios sanos. Estas diferencias pierden su importancia en los hombres, después de ajustar por parámetros de composición corporal. Se observó una pobre adecuación de la dieta en la mayoría de los pacientes con ERC, no observándose asociación entre estas variables y la composición corporal o densidad mineral ósea.

  10. An Integrated Gate Turnaround Management Concept Leveraging Big Data Analytics for NAS Performance Improvements

    Science.gov (United States)

    Chung, William W.; Ingram, Carla D.; Ahlquist, Douglas Kurt; Chachad, Girish H.

    2016-01-01

    "Gate Turnaround" plays a key role in the National Air Space (NAS) gate-to-gate performance by receiving aircraft when they reach their destination airport, and delivering aircraft into the NAS upon departing from the gate and subsequent takeoff. The time spent at the gate in meeting the planned departure time is influenced by many factors and often with considerable uncertainties. Uncertainties such as weather, early or late arrivals, disembarking and boarding passengers, unloading/reloading cargo, aircraft logistics/maintenance services and ground handling, traffic in ramp and movement areas for taxi-in and taxi-out, and departure queue management for takeoff are likely encountered on the daily basis. The Integrated Gate Turnaround Management (IGTM) concept is leveraging relevant historical data to support optimization of the gate operations, which include arrival, at the gate, departure based on constraints (e.g., available gates at the arrival, ground crew and equipment for the gate turnaround, and over capacity demand upon departure), and collaborative decision-making. The IGTM concept provides effective information services and decision tools to the stakeholders, such as airline dispatchers, gate agents, airport operators, ramp controllers, and air traffic control (ATC) traffic managers and ground controllers to mitigate uncertainties arising from both nominal and off-nominal airport gate operations. IGTM will provide NAS stakeholders customized decision making tools through a User Interface (UI) by leveraging historical data (Big Data), net-enabled Air Traffic Management (ATM) live data, and analytics according to dependencies among NAS parameters for the stakeholders to manage and optimize the NAS performance in the gate turnaround domain. The application will give stakeholders predictable results based on the past and current NAS performance according to selected decision trees through the UI. The predictable results are generated based on analysis of the

  11. 25 CFR 215.25 - Other minerals and deep-lying lead and zinc minerals.

    Science.gov (United States)

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Other minerals and deep-lying lead and zinc minerals. 215.25 Section 215.25 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR ENERGY AND MINERALS LEAD AND ZINC MINING OPERATIONS AND LEASES, QUAPAW AGENCY § 215.25 Other minerals and deep-lying lead...

  12. Minerals yearbook: Mineral industries of Asia and the Pacific. Volume 3. 1991 international review

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1991-12-31

    This edition of the Minerals Yearbook records the performance of the worldwide minerals industry during 1991 and provides background information to assist in interpreting that performance. Content of the individual Yearbook volumes follows: Volume I, Metals and Minerals, contains chapters on virtually all metallic and industrial mineral commodities important to the U.S. economy. Volume II, Area Reports: Domestic, contains chapters on the minerals industry of each of the 50 States and Puerto Rico, Northern Marianas, Island Possessions, and Trust Territory. Volume III, Area Reports: International, contains the latest available mineral data on more than 160 foreign countries and discuss the importance of minerals to the economies of these nations.

  13. Ubiquity and diversity of heterotrophic bacterial nasA genes in diverse marine environments.

    Directory of Open Access Journals (Sweden)

    Xuexia Jiang

    Full Text Available Nitrate uptake by heterotrophic bacteria plays an important role in marine N cycling. However, few studies have investigated the diversity of environmental nitrate assimilating bacteria (NAB. In this study, the diversity and biogeographical distribution of NAB in several global oceans and particularly in the western Pacific marginal seas were investigated using both cultivation and culture-independent molecular approaches. Phylogenetic analyses based on 16S rRNA and nasA (encoding the large subunit of the assimilatory nitrate reductase gene sequences indicated that the cultivable NAB in South China Sea belonged to the α-Proteobacteria, γ-Proteobacteria and CFB (Cytophaga-Flavobacteria-Bacteroides bacterial groups. In all the environmental samples of the present study, α-Proteobacteria, γ-Proteobacteria and Bacteroidetes were found to be the dominant nasA-harboring bacteria. Almost all of the α-Proteobacteria OTUs were classified into three Roseobacter-like groups (I to III. Clone library analysis revealed previously underestimated nasA diversity; e.g. the nasA gene sequences affiliated with β-Proteobacteria, ε-Proteobacteria and Lentisphaerae were observed in the field investigation for the first time, to the best of our knowledge. The geographical and vertical distributions of seawater nasA-harboring bacteria indicated that NAB were highly diverse and ubiquitously distributed in the studied marginal seas and world oceans. Niche adaptation and separation and/or limited dispersal might mediate the NAB composition and community structure in different water bodies. In the shallow-water Kueishantao hydrothermal vent environment, chemolithoautotrophic sulfur-oxidizing bacteria were the primary NAB, indicating a unique nitrate-assimilating community in this extreme environment. In the coastal water of the East China Sea, the relative abundance of Alteromonas and Roseobacter-like nasA gene sequences responded closely to algal blooms, indicating

  14. Ubiquity and diversity of heterotrophic bacterial nasA genes in diverse marine environments.

    Science.gov (United States)

    Jiang, Xuexia; Dang, Hongyue; Jiao, Nianzhi

    2015-01-01

    Nitrate uptake by heterotrophic bacteria plays an important role in marine N cycling. However, few studies have investigated the diversity of environmental nitrate assimilating bacteria (NAB). In this study, the diversity and biogeographical distribution of NAB in several global oceans and particularly in the western Pacific marginal seas were investigated using both cultivation and culture-independent molecular approaches. Phylogenetic analyses based on 16S rRNA and nasA (encoding the large subunit of the assimilatory nitrate reductase) gene sequences indicated that the cultivable NAB in South China Sea belonged to the α-Proteobacteria, γ-Proteobacteria and CFB (Cytophaga-Flavobacteria-Bacteroides) bacterial groups. In all the environmental samples of the present study, α-Proteobacteria, γ-Proteobacteria and Bacteroidetes were found to be the dominant nasA-harboring bacteria. Almost all of the α-Proteobacteria OTUs were classified into three Roseobacter-like groups (I to III). Clone library analysis revealed previously underestimated nasA diversity; e.g. the nasA gene sequences affiliated with β-Proteobacteria, ε-Proteobacteria and Lentisphaerae were observed in the field investigation for the first time, to the best of our knowledge. The geographical and vertical distributions of seawater nasA-harboring bacteria indicated that NAB were highly diverse and ubiquitously distributed in the studied marginal seas and world oceans. Niche adaptation and separation and/or limited dispersal might mediate the NAB composition and community structure in different water bodies. In the shallow-water Kueishantao hydrothermal vent environment, chemolithoautotrophic sulfur-oxidizing bacteria were the primary NAB, indicating a unique nitrate-assimilating community in this extreme environment. In the coastal water of the East China Sea, the relative abundance of Alteromonas and Roseobacter-like nasA gene sequences responded closely to algal blooms, indicating that NAB may be

  15. Mineral resource of the month: vermiculite

    Science.gov (United States)

    Tanner, Arnold O.

    2014-01-01

    Vermiculite comprises a group of hydrated, laminar magnesium-aluminum-iron silicate minerals resembling mica. They are secondary minerals, typically altered biotite, iron-rich phlogopite or other micas or clay-like minerals that are themselves sometimes alteration products of amphibole, chlorite, olivine and pyroxene. Vermiculite deposits are associated with volcanic ultramafic rocks rich in magnesium silicate minerals, and flakes of the mineral range in color from black to shades of brown and yellow. The crystal structure of vermiculite contains water molecules, a property that is critical to its processing for common uses.

  16. Perencanaan Strategik SBU Mineral PT Sucofindo (Persero

    Directory of Open Access Journals (Sweden)

    Suprapto Suprapto

    2017-05-01

    Full Text Available Strategic planning requires an organization in the face of today's business competition and a more complex future. Likewise, Mineral Gas Station also requires this strategic planning as a newly formed business unit of 2015. Therefore, the company analyzed its internal and external factors as well as a future review of the mineral service industry to stay afloat, grow and develop. The objectives of this study were to identify the internal performance and core competencies of Mineral Gas Station, to identify the external macro environment condition and external micro intensity of mineral service industry competition, to map the current position of the company, to recommend appropriate business strategy in facing competition pressure, and to develop the objectives and program of the company. This research used descriptive and quantitative analysis methods with a purposive sampling technique. The results show that the position of Mineral Gas Station on the intensity of mineral service competition is 'moderate' and is in quadrant of 'grow and build'. Therefore, the appropriate strategy is intensive strategy (market penetration, market development and product development. Mineral Gas Station require to conduct customer satisfaction surveys related to customer perspectives which becomes the most important strategic factor with a focus on customer complaint factor. Further research is needed by involving all external parties so that the results will be more independent.Keywords: mineral services, strategic planning, competition, mineral gas station, SucofindoABSTRAKPerencanaan strategik dibutuhkan organisasi dalam menghadapi persaingan bisnis saat ini dan masa depan yang semakin komplek. Demikian juga yang dibutuhkan SBU Mineral sebagai unit bisnis yang baru terbentuk 2015, dengan menganalisis faktor internal dan ekternal perusahaan serta tinjauan masa depan industri jasa mineral untuk tetap bertahan, tumbuh dan berkembang. Tujuan penelitian ini adalah

  17. Sorption of pesticides to aquifer minerals

    DEFF Research Database (Denmark)

    Clausen, Liselotte; Fabricius, Ida Lykke

    2000-01-01

    This paper summarizes results from a work were the sorption of five pesticides on seven minerals were studied in order to quantify the adsorption to different mineral surfaces. Investigated mineral phases are: quartz, calcite, kaolinite, a-alumina, and three iron oxides (2-line ferrihydrite, goet......, goethite, lepidocrocite). Selected pesticides are: atrazine, isoproturon, mecoprop, 2,4-D, and bentazone. The results demonstrate that pesticides adsorb to pure mineral surfaces. However, the size of the adsorption depends on the type of pesticide and the type of mineral....

  18. Sodium bicarbonated mineral water decreases postprandial lipaemia in postmenopausal women compared to a low mineral water

    OpenAIRE

    S. Schoppen; Pérez Granados, Ana M.; Carbajal, A.; Sarriá, Beatriz; Sánchez-Muniz, F. J.; J. A. Gómez-Gerique; Vaquero, M. Pilar

    2005-01-01

    The role of bicarbonated mineral waters on lipid metabolism and lipoprotein concentrations in man has scarcely been investigated. The present study aimed to investigate whether drinking sodium bicarbonated mineral water affects postprandial cholesterol and triacylglycerol metabolism in postmenopausal women. In a three-way, randomised, crossover study, eighteen healthy postmenopausal women consumed two sodium bicarbonated mineral waters (bicarbonated mineral water 1 and bicarbonated mineral wa...

  19. Structure-mechanics relationships in mineralized tendons.

    Science.gov (United States)

    Spiesz, Ewa M; Zysset, Philippe K

    2015-12-01

    In this paper, we review the hierarchical structure and the resulting elastic properties of mineralized tendons as obtained by various multiscale experimental and computational methods spanning from nano- to macroscale. The mechanical properties of mineralized collagen fibres are important to understand the mechanics of hard tissues constituted by complex arrangements of these fibres, like in human lamellar bone. The uniaxial mineralized collagen fibre array naturally occurring in avian tendons is a well studied model tissue for investigating various stages of tissue mineralization and the corresponding elastic properties. Some avian tendons mineralize with maturation, which results in a graded structure containing two zones of distinct morphology, circumferential and interstitial. These zones exhibit different amounts of mineral, collagen, pores and a different mineral distribution between collagen fibrillar and extrafibrillar space that lead to distinct elastic properties. Mineralized tendon cells have two phenotypes: elongated tenocytes placed between fibres in the circumferential zone and cuboidal cells with lower aspect ratios in the interstitial zone. Interestingly some regions of avian tendons seem to be predestined to mineralization, which is exhibited as specific collagen cross-linking patterns as well as distribution of minor tendon constituents (like proteoglycans) and loss of collagen crimp. Results of investigations in naturally mineralizing avian tendons may be useful in understanding the pathological mineralization occurring in some human tendons. Copyright © 2015 Elsevier Ltd. All rights reserved.

  20. Quantitative Prediction for Deep Mineral Exploration

    Institute of Scientific and Technical Information of China (English)

    Zhao Pengda; Cheng Qiuming; Xia Qinglin

    2008-01-01

    On reviewing the characteristics of deep mineral exploration, this article elaborates on the necessity of employing quantitative prediction to reduce uncertainty. This is caused by complexity of mineral deposit formational environments and mineralization systems as increase of exploration depth and incompleteness of geo-information from limited direct observation. The authors wish to share the idea of "seeking difference" principle in addition to the "similar analogy" principle in deep mineral exploration, especially the focus is on the new ores in depth either in an area with discovered shallow mineral deposits or in new areas where there are no sufficient mineral deposit models to be compared. An on-going research project, involving Sn and Cu mineral deposit quantitative prediction in the Gejiu (个旧) area of Yunnan (云南) Province, China, was briefly introduced to demonstrate how the "three-component" (geoanomaly-mineralization diversity-mineral deposit spectrum) theory and non-linear methods series in conjunction with advanced GIS technology, can be applied in multi-scale and multi-task deep mineral prospecting and quantitative mineral resource assessment.

  1. Mineralization of Carbon Dioxide: Literature Review

    Energy Technology Data Exchange (ETDEWEB)

    Romanov, V; Soong, Y; Carney, C; Rush, G; Nielsen, B; O' Connor, W

    2015-01-01

    CCS research has been focused on CO2 storage in geologic formations, with many potential risks. An alternative to conventional geologic storage is carbon mineralization, where CO2 is reacted with metal cations to form carbonate minerals. Mineralization methods can be broadly divided into two categories: in situ and ex situ. In situ mineralization, or mineral trapping, is a component of underground geologic sequestration, in which a portion of the injected CO2 reacts with alkaline rock present in the target formation to form solid carbonate species. In ex situ mineralization, the carbonation reaction occurs above ground, within a separate reactor or industrial process. This literature review is meant to provide an update on the current status of research on CO2 mineralization. 2

  2. Decorin modulates matrix mineralization in vitro

    Science.gov (United States)

    Mochida, Yoshiyuki; Duarte, Wagner R.; Tanzawa, Hideki; Paschalis, Eleftherios P.; Yamauchi, Mitsuo

    2003-01-01

    Decorin (DCN), a member of small leucine-rich proteoglycans, is known to modulate collagen fibrillogenesis. In order to investigate the potential roles of DCN in collagen matrix mineralization, several stable osteoblastic cell clones expressing higher (sense-DCN, S-DCN) and lower (antisense-DCN, As-DCN) levels of DCN were generated and the mineralized nodules formed by these clones were characterized. In comparison with control cells, the onset of mineralization by S-DCN clones was significantly delayed; whereas it was markedly accelerated and the number of mineralized nodules was significantly increased in As-DCN clones. The timing of mineralization was inversely correlated with the level of DCN synthesis. In these clones, the patterns of cell proliferation and differentiation appeared unaffected. These results suggest that DCN may act as an inhibitor of collagen matrix mineralization, thus modulating the timing of matrix mineralization.

  3. Identificación de proteínas de cubierta y de membrana en merozoitos de Plasmodium falciparum

    Directory of Open Access Journals (Sweden)

    Enid Rivadeneira

    1987-06-01

    Full Text Available Se identificaron proteínas que se desprenden fácilmente del merozoíto (probablemente proteinas de cubierta y proteínas intrínsecas de la membrana por el fraccionamiento de parásitos marcados endógenamente y purificados. La marcación continua durante todo el ciclo aseguró la identificación de las proteínas independientemente de su tiempo de síntesis. Este método permitió detectar proteínas de membrana, independientemente de su suceptibilidad a la digestión enzimática o a la marcación exógena. Se identificaron 4 proteínas de 100, 75, 50 y 45 KD que probablemente son constituyentes de la cubierta del merozoíto. En la fracción de membranas, solubles en detergente, se detectan 6 proteínas principales de 225, 86, 82, 75, 72 y 40 KD y 4 proteínas menores de 200, 69, 45 y 43 KD. Este trabajo es una contribución a la caracterización de la superficie del merozoíto de Plasmodium falciparum.

  4. Unmanned Aircraft Systems (UAS) Integration in the National Airspace System (NAS) Project KDP-C Review

    Science.gov (United States)

    Grindle, Laurie; Sakahara, Robert; Hackenberg, Davis; Johnson, William

    2017-01-01

    The topics discussed are the UAS-NAS project life-cycle and ARMD thrust flow down, as well as the UAS environments and how we operate in those environments. NASA's Armstrong Flight Research Center at Edwards, CA, is leading a project designed to help integrate unmanned air vehicles into the world around us. The Unmanned Aircraft Systems Integration in the National Airspace System project, or UAS in the NAS, will contribute capabilities designed to reduce technical barriers related to safety and operational challenges associated with enabling routine UAS access to the NAS. The project falls under the Integrated Systems Research Program office managed at NASA Headquarters by the agency's Aeronautics Research Mission Directorate. NASA's four aeronautics research centers - Armstrong, Ames Research Center, Langley Research Center, and Glenn Research Center - are part of the technology development project. With the use and diversity of unmanned aircraft growing rapidly, new uses for these vehicles are constantly being considered. Unmanned aircraft promise new ways of increasing efficiency, reducing costs, enhancing safety and saving lives 460265main_ED10-0132-16_full.jpg Unmanned aircraft systems such as NASA's Global Hawks (above) and Predator B named Ikhana (below), along with numerous other unmanned aircraft systems large and small, are the prime focus of the UAS in the NAS effort to integrate them into the national airspace. Credits: NASA Photos 710580main_ED07-0243-37_full.jpg The UAS in the NAS project envisions performance-based routine access to all segments of the national airspace for all unmanned aircraft system classes, once all safety-related and technical barriers are overcome. The project will provide critical data to such key stakeholders and customers as the Federal Aviation Administration and RTCA Special Committee 203 (formerly the Radio Technical Commission for Aeronautics) by conducting integrated, relevant system-level tests to adequately address

  5. ProteÃnas salivares como biomarcadores para cÃrie dentÃria

    OpenAIRE

    Sarah Florindo de Figueiredo Guedes

    2014-01-01

    O nÃmero de estudos que correlacionam proteÃnas salivares e cÃrie dentÃria tÃm aumentado consideravelmente, no entanto, nÃo hà elementos suficientes que permitam qualificÃ-las como biomarcadores especÃficos para a doenÃa. O objetivo do estudo foi realizar uma anÃlise comparativa das proteÃnas da saliva de pacientes com cÃrie precoce da infÃncia (CPI) em diferentes nÃveis de severidade, visando à identificaÃÃo de potenciais biomarcadores salivares especÃficos para diagnÃstico desta patologia. ...

  6. Período de latência e tempo para compreender nas aprendizagens

    Directory of Open Access Journals (Sweden)

    Crístia Rosineiri Gonçalves Lopes Corrêa

    2013-03-01

    Full Text Available O artigo aborda a dimensão do período de latência e do tempo para compreender nas aprendizagens. Argumenta que, a partir de Lacan (1959, se de um lado a inibição neurótica pode ser lida como uma paralisação no tempo para compreender, de outro é possível concluir que a inibição estrutural diz de uma vivência própria do tempo para compreender, nas aprendizagens, a qual antecede e apoia o conclusivo ato de aprender e o usufruto dessa aprendizagem. Para tal argumento, o artigo extrai consequências da abordagem da latência dada por Freud (1939 em "Moisés e o monoteísmo", argumentando que a latência se aproxima do tempo para compreender do qual nos fala Lacan (1946.

  7. The Reflection of Quantum Aesthetics in Algis Mickūnas Cosmic Philosophy

    Directory of Open Access Journals (Sweden)

    Auridas Gajauskas

    2011-04-01

    Full Text Available Quantum Aesthetics phenomenon was formed in Spain, at the end of the twentieth centure. The paper analyzes this movement in the context of Algis Mickūnas phenomenological cosmic philosophy. Movement initiator is a Spanish novelist Gregorio Morales. The study is divided into two parts: the first part presents aesthetic principles of the quantum, relationship between new aesthetics and theories of quantum mechanics, physics and other sciences. The paper also examines the similarities of quantum aesthetics and New Age movements. The second part presents cosmic - phenomenological reflection of quantum theory of beauty. Mickūnas philosophical position combines theory of "eternal recurrence", "the bodily nature of consciousness", "the cosmic dance", theory of "dynamic fields" and quantum approach to aesthetics and the Universe. Summa Summarum he writes that "the conception of quantum aesthetics is involved in the composition of the rhythmic, cyclical and mood dimensioned and tensed world". 

  8. Filhos de alcoolistas: afetividade e conflito nas relações familiares

    OpenAIRE

    Joseane de Souza

    2008-01-01

    O presente estudo teve como objetivos: verificar os níveis de afetividade e de conflito nas díades pai-mãe, pai-filho, (subsistema parental), identificar a ocorrência de sintomas depressivos, problemas comportamentais e cognitivos nas crianças de 9 a 11 anos, identificar sintomas depressivos nos pais e mães, buscar compreender a história de vida do pai e da mãe em suas famílias de origem, descrever a percepção que pai/marido e mãe/esposa têm do alcoolismo e suas conseqüências para as relações...

  9. Representação da mulher nas grandes produções de Hollywood

    OpenAIRE

    Rodrigues, Rúben Gouveia

    2013-01-01

    Dissertação submetida como requisito parcial para obtenção do grau de Mestre em Sociologia Questões de género constituem um vasto campo de análise em sociologia. A posição e o papel das mulheres na sociedade é uma das questões mais debatidas aí. Assistiu-se nas últimas décadas à progressiva libertação da mulher face aos limites que lhe eram impostos, uma evolução registada sobretudo nas sociedades ocidentais. Porém, ela ainda continua a enfrentar obstáculos. Os preconceitos e estereótipos,...

  10. A regra de ouro e a ética nas organizações

    Directory of Open Access Journals (Sweden)

    Hermano Roberto Thiry-Cherques

    Full Text Available Este artigo examina o princípio da regra de ouro e questiona a sua ampla aplicação nas organizações. O texto resume a trajetória da regra na história do pensamento filosófico e, a partir da crítica de Kant, apresenta argumentos que expõem a sua fragilidade lógica.

  11. ZHANG Jie and V, W, W. Yam Elected NAS Foreign Associates

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    According to an announcement released by the US National Academy of Sciences (NAS) on May l, 2012, two outstanding scientists from China including physicist ZHANG Jie and chemist Vivian Wing Wah Yam, both members of the Chinese Academy of Sciences, were elected to NAS as its new foreign associates. Prof. ZHANG Jie is a leading scientist in strong field physics and X-ray laser technologies, and now serves as the President of Shanghai Jiao Tong University. Prof.

  12. Large-scale structural analysis: The structural analyst, the CSM Testbed and the NAS System

    Science.gov (United States)

    Knight, Norman F., Jr.; Mccleary, Susan L.; Macy, Steven C.; Aminpour, Mohammad A.

    1989-01-01

    The Computational Structural Mechanics (CSM) activity is developing advanced structural analysis and computational methods that exploit high-performance computers. Methods are developed in the framework of the CSM testbed software system and applied to representative complex structural analysis problems from the aerospace industry. An overview of the CSM testbed methods development environment is presented and some numerical methods developed on a CRAY-2 are described. Selected application studies performed on the NAS CRAY-2 are also summarized.

  13. Amaranto como ingrediente funcional: propiedades antioxidantes de proteínas y péptidos

    OpenAIRE

    Orsini Delgado, María Cecilia

    2015-01-01

    Objetivo general: Analizar distintas condiciones de simulación de la digestión gastrointestinal in vitro de proteínas de amaranto y caracterizar las muestras obtenidas. Objetivos específicos: » Evaluar diferentes condiciones de digestión gastrointestinal simulada sobre un aislado proteico de amaranto, variando relaciones enzimas/sustrato y tiempos de reacción. » Analizar, junto con el grado de hidrólisis, la potencial actividad antioxidante de los dige...

  14. O impacto da depressão materna nas interações iniciais

    Directory of Open Access Journals (Sweden)

    Brum, Evanisa Helena Maio

    2006-01-01

    Full Text Available O presente estudo objetiva examinar questões teóricas a respeito da depressão materna nas interações iniciais para o desenvolvimento infantil, os estudos apontam para a ocorrência de desordens comportamentais, afetivas, cognitivas e sociais, bem como alterações da atividade cerebral. Salienta-se algumas formas de intervenção precoce para dirimir a probabilidade de conseqüências adversas para o desenvolvimento infantil

  15. Flujo y concentración de proteínas en saliva total humana

    Directory of Open Access Journals (Sweden)

    BANDERAS-TARABAY JOSÉ ANTONIO

    1997-01-01

    Full Text Available Objetivo. Determinar los promedios de flujo salival y la concentración de proteínas totales en una población joven del Estado de México. Material y métodos. Se seleccionaron 120 sujetos a quienes se les colectó saliva total humana (STH no estimulada y estimulada, la cual se analizó por medio de gravimetría y espectrofotometría (LV/LU; se calcularon medidas de tendencia central y de dispersión; posteriormente, se correlacionaron estos datos con los índices CPOD y CPITN. Resultados. Los sujetos estudiados mostraron un promedio de flujo salival (ml/min ± DE en STH no estimulada de 0.397±.26, y en STH estimulada, de 0.973±.53. El promedio en la concentración de proteínas (mg/ml ± DE fue de 1.374±.45 en STH no estimulada y de 1.526±.44 en STH estimulada. Las mujeres presentaron un menor porcentaje de flujo salival y mayor concentración de proteínas. No se observaron correlaciones entre el flujo y la concentración de proteínas totales y el CPOD y CPITN; sin embargo, sí las hubo con otras variables. Conclusiones. Estos hallazgos podrían estar asociados con el grado de nutrición, las características genéticas y los niveles de salud bucal en nuestra población. El presente estudio representa la fase inicial de la creación de una base de datos en sialoquímica, cuya meta será identificar los parámetros que indiquen el riesgo de enfermedades sistémicas o bucodentales.

  16. ROCKS & MINERALS DETERMINATION AND ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    <正>20110144 Hu Lan(Anhui Institute of Geological Experiment,Hefei 230001,China);Liu Yueyou Determination of Micro-amount of Bismuth in Polymetallic Ores by Hydride Generation-Atomic Fluorescence Spectrometry with Alkaline Mode(Rock and Mineral Analysis,ISSN0254-5357,CN11-2131/TD,29(1),2010,p.87-88,2 tables,10 refs.)Key words:atomic fluorescence spectrometry,bismuthA method for the determination of micro-amount of bismuth in polymetallic ores by hydride gen

  17. ROCKS & MINERALS DETERMINATION AND ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    2015-01-01

    20150204 Abaydulla Alimjan(Department of Chemistry and Environmental Sciences,Kashgar Teachers College,Kashgar 844006,China);Cheng Chunying Non-Metallic Element Composition Analysis of Non-Ferrous Metal Ores from Oytagh Town,Xinjiang(Rock and Mineral Analysis,ISSN0254-5357,CN11-2131/TD,33(1),2014,p.44-50,5illus.,4tables,28refs.)Key words:nonferrous metals ore,nonmetals,chemical analysis,thermogravimetric analysis Anions in non-ferrous ore materials

  18. LA FASE ESPONJA COMO SISTEMA BIOMIMÉTICO PARA CRISTALIZAR PROTEÍNAS DE MEMBRANA

    Directory of Open Access Journals (Sweden)

    Amir Maldonado Arce

    2016-06-01

    Full Text Available En este trabajo se describe de manera general la importancia de la cristalización de proteínas para realizar experimentos de difracción de rayos X que permitan dilucidar la estructura terciaria de dichas biomoléculas. En particular, se expone que la cristalización de proteínas de membrana requiere métodos especiales de preparación de la matriz de cristalización puesto que se debe “mimetizar” el ambiente hidrofóbico de la proteína en la membrana. De esta manera, el trabajo se centra en algunas propiedades de la fase líquida de membranas denominada “fase esponja”, cuya característica principal es una estructura membranar compleja conectada en tres dimensiones. Debido a su microestructura, la fase esponja es transparente e isotrópica, además de presentar baja viscosidad en las membranas. Estas características convierten a la fase esponja en un medio “biomimético” potencialmente útil para cristalizar proteínas de membrana.

  19. Improved performance due to selective passivation of nitrogen clusters in GaInNAs solar cells

    Science.gov (United States)

    Fukuda, Miwa; Whiteside, Vincent R.; Al Khalfioui, Mohamed; Leroux, Mathieu; Hossain, Khalid; Sellers, Ian R.

    2015-03-01

    While GaInNAs has the potential to be a fourth-junction in multi-junction solar cells it has proved to be difficult to incorporate due to the low solubility of nitrogen in these materials. Specifically, mid-gap states attributed to nitrogen clusters have proved prohibitive for practical implementation of these systems. Here, we present the selective passivation of nitrogen impurities using a UV-activated hydrogenation process, which enables the removal of defects while retaining substitution nitrogen. Temperature dependent photoluminescence measurements of the intrinsic region of a GaInNAs p-i-n solar cell show a classic ``s-shape'' associated with localization prior to hydrogenation, while after hydrogenation no sign of the ``s-shape'' is evident. This passivation of nitrogen centers is reflected in improved performance of solar cells structures relative to reference, unpassivated devices presenting a potential route to practical implementation of GaInNAs solar cells. The authors acknowledge support through Oklahoma Center for the Advancement of Science and Technology under the Oklahoma Applied Research Support Grant No. AR12.2-040.

  20. Nursing activities score (NAS): a proposal for practical application in intensive care units.

    Science.gov (United States)

    Gonçalves, Leilane Andrade; Padilha, Katia Grillo; Cardoso Sousa, Regina M

    2007-12-01

    For over 30 years in an attempt to demonstrate the cost-benefit ratio of the intensive care unit (ICU) a variety of tools have been developed to measure not only the severity of illness of the patient but also to capture the true cost of nursing workload. In this context, the nursing activities score (NAS) was developed as a result of modifications to the therapeutic interventions scoring system-28 (TISS-28). The NAS is a tool to measure nursing workload ICU and it has been shown to be twice as effective in measuring how nurses spend their time caring for critically ill patients than the TISS-28. This paper discuss the introduction of the NAS into everyday use in an intensive care unit in Brazil and highlights the challenges of standardisation of operational definitions, training requirements and accurate completion of the documentation when using such a tool. The rationale and steps undertaken to achieve this are outlined and the benefits of such a process are highlighted.

  1. As meditações americanas de Keyserling: um cosmopolitismo nas incertezas do tempo

    Directory of Open Access Journals (Sweden)

    Daniel Faria

    2013-12-01

    Full Text Available Hoje esquecida, a obra de Keyserling teve grande sucesso nas décadas de 1920 e 1930, com êxito editorial e repercussão entre intelectuais ao redor do mundo. No Brasil, visitado pelo conde em 1929, Keyserling foi citado em textos de Oswald e Mário de Andrade, comentários de Alceu Amoroso Lima e Lindolfo Collor, entre outros. Mário de Andrade chegou a dizer que a obra de Keyserling era a chave para a interpretação de Macunaíma.. O tema de sua obra era a decadência ocidental frente à pluralidade dos tempos históricos nas civilizações do mundo. O oriente lento, o progresso europeu e o primitivismo americano formariam uma harmonia mundial das temporalidades. Neste artigo nos deteremos nas reflexões de Keyserling e seus interlocutores, tendo em vista a questão dos mal-entendidos subjacentes a um projeto de paz mundial, baseado numa interpretação exotizante acerca das diferenças culturais, especialmente as relacionadas a uma suposta identidade sul-americana.

  2. GESTÃO DO CONHECIMENTO NAS ORGANIZAÃÃES OU DO DESCONHECIMENTO DA REALIDADE ORGANIZACIONAL?

    Directory of Open Access Journals (Sweden)

    Tibério Mitidieri

    2005-12-01

    Full Text Available Este artigo discute a validade dos propósitos da gestão do conhecimento como ferramenta de intervenção organizacional, descrevendo alguns paradoxos existentes entre a sua teoria e prática nas organizações. Argumenta-se que seus propósitos originais de criação, difusão e incorporação de um novo conhecimento na organização estão dando lugar a uma abordagem que não condiz com a realidade das organizações. Faz-se também uma leitura da evolução das teorias administrativas para elucidar como esse novo paradigma da administração está sendo abordado nas empresas. Propõe-se que se trata de uma reificação da máxima taylorista, cujos propósitos originais estão se convertendo em mais um instrumento de manipulação humana nas empresas. Ao final, em substituição ao modelo gerencial vigente, é proposto um processo de gestão baseado em valores.

  3. Individualização, fragmentação e risco social nas sociedades globalizadas

    Directory of Open Access Journals (Sweden)

    Pedro Hespanha

    2012-10-01

    Full Text Available O autor reflecte sobre os processos através dos quais a globalização está a provocar a corrosão das estruturas de coesão interna nas sociedades contemporâneas e, ao mesmo tempo, a aumentar o risco de marginalização e de exclusão para sectores crescentes da população. A diferenciação social é um desses processos e está relacionado com fenómenos bastante visíveis nas sociedades contemporâneas, como a acentuação das desigualdades, a crescente marginalização de certas camadas e a gradual destruição das solidariedades sociais. O texto começa por analisar dois dos efeitos mais notórios por que o processo de diferenciação social opera – os efeitos de segmentação social e de individualização da vida social –, centrando-se, posteriormente, nas questões do agravamento do risco social e da relativa invisibilidade deste risco.A sociedade portuguesa é tomada como referência nesta reflexão e os resultados dos estudos realizados no âmbito do projecto “A Sociedade Portuguesa perante os Desafios da Globalização” constituem o capital de prova utilizado.

  4. GESTÃO DO CONHECIMENTO NAS ORGANIZAÇÕES OU DO DESCONHECIMENTO DA REALIDADE ORGANIZACIONAL?

    Directory of Open Access Journals (Sweden)

    Fladimir F. dos Santos

    2005-12-01

    Full Text Available Este artigo discute a validade dos propósitos da gestão do conhecimento como ferramenta de intervenção organizacional, descrevendo alguns paradoxos existentes entre a sua teoria e prática nas organizações. Argumenta-se que seus propósitos originais de criação, difusão e incorporação de um novo conhecimento na organização estão dando lugar a uma abordagem que não condiz com a realidade das organizações. Faz-se também uma leitura da evolução das teorias administrativas para elucidar como esse novo paradigma da administração está sendo abordado nas empresas. Propõe-se que se trata de uma reificação da máxima taylorista, cujos propósitos originais estão se convertendo em mais um instrumento de manipulação humana nas empresas. Ao final, em substituição ao modelo gerencial vigente, é proposto um processo de gestão baseado em valores.

  5. O papel das quimiocinas nas uveítes The role of chemokines in uveitis

    Directory of Open Access Journals (Sweden)

    Roberto Martins Gonçalves

    2007-03-01

    Full Text Available A inflamação é parte do processo fisiológico que visa reparar o dano tecidual causado por infecção, trauma, auto-imunidade. Quando este processo fisiológico encontra-se alterado, pode contribuir para o aumento do dano tecidual. As quimiocinas e seus receptores são importantes elementos envolvidos no processo de migração celular para os tecidos inflamados. Nas doenças oculares, principalmente nas uveítes, estas proteínas estão sendo identificadas como importantes mediadores da resposta inflamatória. Esta revisão visa discutir o papel das quimiocinas em diversas doenças oculares, dando ênfase aos processos uveíticos.Inflammation is part of the physiological process that aims at repairing the damage produced by different causes such as infection, trauma, and autoimmune disease. However, when this physiological process is not regulated, it can contribute to the increase in tissue damage. Chemokines and their receptors are major factors involved in the process of cell migration into inflamed tissues. In the ocular diseases, mainly in uveitis, such proteins have been identified as important mediators of the inflammation process. This review discusses the role of chemokines in several ocular diseases, with emphasis on the uveitic process.

  6. Nanodiscos como herramienta para estudiar interacciones entre proteínas de división bacteriana

    OpenAIRE

    García Montañés, Concepción

    2014-01-01

    La división celular en E. coli implica el ensamblaje de un complejo macromolecular, denominado divisoma, formado por varias proteínas, 10 de ellas esenciales. Se conoce la secuencia lineal y concertada de ensamblaje que siguen estas proteínas del divisoma y algunas de sus actividades bioquímicas, así como algunas interacciones proteína-proteína involucradas. Inicialmente, 3 proteínas, FtsZ, ZipA y FtsA ensamblan juntas formando el proto-anillo en el cual se van incorporando el resto de compon...

  7. Optimisation of optical properties of a long-wavelength GaInNAs quantum-well laser diode

    Energy Technology Data Exchange (ETDEWEB)

    Alias, M S; Maskuriy, F; Faiz, F; Mitani, S M [Advanced Physical Technologies Laboratory, Telekom Malaysia Research and Development (TMR and D), Lingkaran Teknokrat Timur, 63000 Cyberjaya, Selangor (Malaysia); AL-Omari, A N [Electronic Engineering Department, Hijjawi Faculty for Engineering Technology, Yarmouk University, Irbid 21163 (Jordan)

    2013-11-30

    We report optimisation of optical properties of a strained GaInNAs/GaAs quantum-well laser, by taking into account the many-body effect theory and the bowing parameter. The theoretical transition energies and the GaInNAs bowing parameter are fitted into the photoluminescence spectrum of the GaInNAs quantum well, obtained in the experiment. The theoretical results for the photoluminescence spectrum and laser characteristics (light, current and voltage) exhibits a high degree of agreement with the experimental results. (lasers)

  8. Mineral Resource Information System for Field Lab in the Osage Mineral Reservation Estate

    Energy Technology Data Exchange (ETDEWEB)

    Carroll, H.B.; Johnson, William I.

    1999-04-27

    The Osage Mineral Reservation Estate is located in Osage County, Oklahoma. Minerals on the Estate are owned by members of the Osage Tribe who are shareholders in the Estate. The Estate is administered by the Osage Agency, Branch of Minerals, operated by the U.S. Bureau of Indian Affairs (BIA). Oil, natural gas, casinghead gas, and other minerals (sand, gravel, limestone, and dolomite) are exploited by lessors. Operators may obtain from the Branch of Minerals and the Osage Mineral Estate Tribal Council leases to explore and exploit oil, gas, oil and gas, and other minerals on the Estate. Operators pay a royalty on all minerals exploited and sold from the Estate. A mineral Resource Information system was developed for this project to evaluate the remaining hydrocarbon resources located on the Estate. Databases on Microsoft Excel spreadsheets of operators, leases, and production were designed for use in conjunction with an evaluation spreadsheet for estimating the remaining hydrocarbons on the Estate.

  9. ROCKS & MINERALS DETERMINATION AND ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    <正>20110887 Chen Yong(College of Geo-Resources and Information,China University of Petroleum,Qingdao 266555,China);Ge Yunjin Experimental Study on the Modes of Hydrocarbon-Bearing Inclusion Trapped in Carbonate Rock Reservoirs(Rock and Mineral Analysis,ISSN0254-5357,CN11-2131/TD,29(3),2010,p.217-220,1 illus.,16 refs.,with English abstract)Key words:petroleum products,organic inclusion,carbonates20110888 Cheng Zhizhong(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang 065000,China);Gu Tiexin Preparation of Nine Iron Ore Reference Materials of GFe-1~GFe-9(Rock and Mineral Analysis,ISSN0254-5357,CN11-2131/TD,29(3),2010,p.305-308,5 tables,13 refs.)Key words:iron ores,type specimens Nine standard reference iron ore samples of GFe-1~GFe-9 were developed.The concentrations of TFe of the samples ranged from 20.17% to 66.87%,which covered a wide iron concentration range from concentrated iron ore powder to poor iron ores and can meet the needs for iron ore exploration and ore-dressing.Powder XRF technique was used for homogeneity test and the analytical results indicated that all elements tested were in good homogeneity.

  10. Mineral fibre persistence and carcinogenicity.

    Science.gov (United States)

    McDonald, J C

    1998-10-01

    Epidemiological research during the past 40 years has demonstrated with increasing clarity that amphibole asbestos fibres--crocidolite, amosite and tremolite--are more carcinogenic than chrysotile. A smaller number of well-controlled studies using lung burden analyses, while adding to the specificity of this conclusion, have shown that amphibole fibres also differ from chrysotile in being far more durable and biopersistent in lung tissue. Analyses of mesothelioma and lung cancer in a large cohort of Canadian chrysotile miners and millers have recently shown that the low-level presence of fibrous tremolite in these mines, rather than the chrysotile, may well be responsible. The high risk of lung cancer, but not of mesothelioma, in the chrysotile textile industry remains anomalous and cannot be explained in this way. These various findings are directly relevant to the choice of the experimental methods which should be used for screening man-made fibres for industrial use. Although it is clear that biopersistence is a major determinant of cancer risk in animals, and perhaps also in man, other factors affecting the biological activity of mineral fibres may also be important.

  11. Nanofiltration renovation of mineral water

    Directory of Open Access Journals (Sweden)

    Bodzek Michał

    2017-06-01

    Full Text Available There is often a need to improve the taste of mineral water by reducing the sulphate ion content. It was found that for such an effect, nanofiltration (NF process can be used. In the case, the proposed formula was assumed obtaining a mineral water with reduction of H2S and SO42- content through the following processes: stripping - UF/MF or rapid fi ltration - nanofiltration - mixing with raw water or filtration through calcium bed. The paper shows the results of the tests, with use of mineral waters and nanofiltration. Commercial nanofiltration membranes NF-270 Dow Filmtec and NF-DK GE Infrastructure Water&Process Technologies were applied. NF was carried out for mixed water from both water intakes (1 and 2, recovery of 50%, at transmembrane pressure of 0.8-1.2 MPa in the dead-end fi ltration mode. In addition, the permeate obtained in NF was filtered through a column fi lled with 1.0-3.0 mm limestone rock, in order to improve the composition of mineral water. The tested mineral water is the sulphate-chloride-sodium-calcium-magnesium in nature and contains 991 mg/L of SO42- and 2398 mg/L of TDS, while the permeate after NF showed the chloride - sodium hydrogeochemical type (TDS: 780-1470 mg/L, sulfate 10-202.7 mg/L, calcium 23-39.7 mg/L, magnesium 11-28 mg/L. As a result of water treatment in the NF process, high reduction of SO42- ions was obtained (79-98.7%, while the TDS was reduced in 51-64%. Because the process of NF allows for relatively high reduction of bivalent ions, a significant reduction in calcium ion content (84-88% and magnesium (84-89% has been also obtained. Monovalent ions were reduced to a lesser extent, i.e. sodium in 46% and bicarbonates in 39-64.1%. Despite obtaining the positive effect of the sulphate ions content reduction, the NF process significantly changed the mineralogy composition of water. The permeate filtration (DK-NF membrane on the CaCO3 deposit led to a correction of the hydrogeochemical type of water from

  12. As pesquisas etnográficas em enfermagem nas sociedades complexas

    Directory of Open Access Journals (Sweden)

    Maria Helena Lenardt

    2011-07-01

    Full Text Available Introdução: As sociedades multiculturais do mundo pós-moderno caracterizam-se pela complexidade de sua estrutura,organização e funcionamento. Nessas sociedades, há um conjunto de atores sociais heterogêneos que experimentam umavariedade de fenômenos no seu cotidiano nas cidades. Nesse contexto desenvolvem-se os cuidados profissionais emEnfermagem e nos últimos anos os enfermeiros têm recorrido à etnografia como ferramenta para conhecer a realidade sócioculturale a experiência dos fenômenos na perspectiva de quem os vivencia. Trata-se de estudo teórico com o objetivo derefletir sobre a aplicação da abordagem etnográfica nas pesquisas brasileiras em Enfermagem nas sociedades complexas.Etnografia nas pesquisas brasileiras em enfermagem nas sociedades complexas: Os enfermeiros brasileiros têm seapropriado dos recursos metodológicos e das teorias antropológicas e da Enfermagem para desenvolver estudos sobre asvivências, experiências e significados atribuídos ao processo saúde-doença, influência cultural sobre os comportamentosrelacionados à saúde e a avaliação e gerenciamento dos processos de trabalho. Ressalta-se ainda, estudos que buscam teorizare refletir a respeito da construção metodológica nessas pesquisas. Esse movimento evidencia uma mudança de enfoque naspesquisas e práticas da Enfermagem, para uma visão mais integrativa e complexa dos seres humanos e da realidade. O métodoetnográfico possibilita apreender elementos da cultura de uma realidade e, como resultado, obter novas perspectivas deconhecimento destes fenômenos.Reflexão final: Considera-se que os conhecimentos antropológicos ampliam a visão do enfermeiro sobre os sujeitos aosquais destina a sua prática, refinando-a. A aproximação na vivência e experiência dos sujeitos permite a percepção dosfenômenos na perspectiva dos atores envolvidos, oferecendo ao profissional um olhar diferenciado para as necessidades eresultados do cuidado de

  13. PROPRIEDADES FUNCIONAIS DAS PROTEÍNAS DE AMÊNDOAS DA MUNGUBA (Pachira aquatica Aubl.

    Directory of Open Access Journals (Sweden)

    BERNADETE DE LOURDES DE ARAÚJO SILVA

    2015-03-01

    Full Text Available RESUMO A semente da munguba (Pachira aquatica Aubl. contém amêndoas que exibem um conteúdo excelente de óleo e um percentualsignificativo em proteínas. Propositou-se determinar algumas propriedades funcionais das proteínas de amêndoas damunguba com o objetivo de instituir sua utilização na indústria de alimentos. O teor lipídico foi de 46,62%, o proteico de 13,75% e na forma de torta apresentou um índice de 28,27% de proteínas. Obtiveram-se doisisolados proteicos, o IP 2,0 e o IP 10,0, decorrentes de duas condições de pH (2,0 e 10,0. Na obtenção dos isolados proteicos, os índices em proteínas extraídas foram de 38,52% para o IP 2,0 e 82,06% para o IP 10,0. Os índices de proteínas recuperadas através da precipitação isoelétrica foram de 23,35% para o IP 2,0 e de 70,94%para o IP 10,0, em pH 5,0. As propriedades funcionais exibiram solubilidade mínima em pH 5,0, no pontoisoelétrico (pI, sendo mais elevada em pH ácido e alcalino do pI. As melhores capacidades de absorçãode água e de óleo exibidas foram para o IP 10,0. As propriedades emulsificantes foram dependentes do pH para os dois isolados, e o IP 10,0 indicou melhores resultados. As propriedades funcionais estudadas permitem o emprego dos isolados proteicos em produtos alimentícios que requerem alta solubilidade, tais como os produtos de panificação, massas em geral, sopas desidratadas e molhos, produtos que exigem desempenho na absorção do óleo, como as carnes simuladas, e em produtos que requerem poderes emulsificantes.

  14. Mineral physics and mineral chemistry at the Australian National University

    Science.gov (United States)

    Jackson, Ian

    Research at the Australian National University (ANU) in Canberra into the physics and chemistry of minerals is being actively carried out by a number of different research groups within the Research School of Earth Sciences (RSES), the Research School of Chemistry (RSC), and the Department of Geology. The research schools form part of the Institute of Advanced Studies, which is a national center for research and postgraduate training established by the Australian Government in 1946. The Institute of Advanced Studies seeks to ensure flexibility in its approach to research by maintaining an unusually high ratio (>1) of nontenured to tenured staff. Two types of nontenured appointment are available: postdoctoral fellowships of 1-2 yr duration and research fellowships tenable for 3-5 yr. The Department of Geology, as part of the Faculty of Science, is responsible for the provision of undergraduate education in geology, in addition to its role in research and postgraduate training.

  15. Proteínas Involucradas en los Mecanismos de Defensa de Plantas Proteínas Involucradas en los Mecanismos de Defensa de Plantas

    Directory of Open Access Journals (Sweden)

    César Aguirre Mancilla

    2012-02-01

    Full Text Available The plants lacking a defense system based on similar antibodies to which exists in animals, bases their protection on physical characteristics and in a series of components that the own plant synthesizes. Inside those compounds, the proteins constitute one of the main defense sources, not only for their high specificity and efficiency, but because some of them are also highly regulated, their synthesis responding to the attack of the insects orby pathogens. These proteins represent an interesting alternative to produce plants with better resistance characteristics, since through breeding mechanisms or introducing the gene a susceptible plant, by means of the genetic engineering. The knowledge of its action mechanisms represents an important form to learn how to combat plagues and illnesses of the plants, without having to use compound highly polluting, like the commercial insecticides. Las plantas careciendo de un sistema de defensa basado en anticuerpos similar al que existe en animales, basan su protección en características físicas y en una serie de componentes que la propia planta sintetiza. Dentro de esos compuestos, las proteínas constituyen una de las principales fuentes de defensa, no sólo por su elevada especificidad y eficiencia, sino porque además algunas de ellas son altamente reguladas, respondiendo su síntesis al ataque de los depredadores (insectos o de los patógenos. Estas proteínas representan una interesante alternativa para producir plantas con mejores características de resistencia, ya que a través de mecanismos de fitomejoramiento o bien introduciendo el gen a plantas sensibles, por medio de la ingeniería genética. El conocimiento de sus mecanismos de acción representa una forma importante para aprender a combatir plagas y enfermedades de las plantas, sin tener que utilizar compuestos altamente contaminantes, como son los insecticidas comerciales.

  16. The nanosphere iron mineral(s) in Mars soil

    Science.gov (United States)

    Banin, A.; Ben-Shlomo, T.; Margulies, L.; Blake, D. F.; Mancinelli, R. L.; Gehring, A. U.

    1993-01-01

    A series of surface-modified clays containing nanophase (np) iron/oxyhydroxides of extremely small particle sizes, with total iron contents as high as found in Mars soil, were prepared by iron deposition on the clay surface from ferrous chloride solution. Comprehensive studies of the iron mineralogy in these 'Mars-soil analogs' were conducted using chemical extractions, solubility analyses, pH and redox, x ray and electron diffractometry, electron microscopic imaging specific surface area and particle size determinations, differential thermal analyses, magnetic properties characterization, spectral reflectance, and Viking biology simulation experiments. The clay matrix and the procedure used for synthesis produced nanophase iron oxides containing a certain proportion of divalent iron, which slowly converts to more stable, fully oxidized iron minerals. The noncrystalline nature of the iron compounds precipitated on the surface of the clay was verified by their complete extractability in oxalate. Lepidocrocite (gamma-FeOOH) was detected by selected area electron diffraction. It is formed from a double iron Fe(II)/Fe(III) hydroxyl mineral such as 'green rust', or ferrosic hydroxide. Magnetic measurements suggested that lepidocrocite converted to the more stable meaghemite (gamma-Fe203) by mild heat treatment and then to nanophase hematite (aplha-Fe203) by extensive heat treatment. Their chemical reactivity offers a plausible mechanism for the somewhat puzzling observations of the Viking biology experiments. Their unique chemical reactivities are attributed to the combined catalytic effects of the iron oxide/oxyhydroxide and silicate phase surfaces. The mode of formation of these (nanophase) iron oxides on Mars is still unknown.

  17. Defective skeletal mineralization in pediatric CKD.

    Science.gov (United States)

    Wesseling-Perry, Katherine

    2015-04-01

    Although traditional diagnosis and treatment of renal osteodystrophy focused on changes in bone turnover, current data demonstrate that abnormalities in skeletal mineralization are also prevalent in pediatric chronic kidney disease (CKD) and likely contribute to skeletal morbidities that continue to plague this population. It is now clear that alterations in osteocyte biology, manifested by changes in osteocytic protein expression, occur in early CKD before abnormalities in traditional measures of mineral metabolism are apparent and may contribute to defective skeletal mineralization. Current treatment paradigms advocate the use of 1,25(OH)2vitamin D for the control of secondary hyperparathyroidism; however, these agents fail to correct defective skeletal mineralization and may exacerbate already altered osteocyte biology. Further studies are critically needed to identify the initial trigger for abnormalities of skeletal mineralization as well as the potential effects that current therapeutic options may have on osteocyte biology and bone mineralization.

  18. Mining and minerals policy: 1976 bicentennial edition

    Energy Technology Data Exchange (ETDEWEB)

    1976-07-01

    The report is organized into three basic parts. The first part, the Executive Summary, provides a brief description of the major topics and lists the issues and recommendations. The report then is divided into two sections. Section I, Summary, is comprised of three chapters: Increased Energy Security; Metals and Nonmetallic Minerals; and Trends and Events. Section II, Issues in Energy and Minerals Policy, is comprised of seven chapters: Federal Leasing; The Federal Role in Reducing the Fiscal Impacts of Energy Development; Availability of Federal Lands for Mineral Exploration and Development; Environmental Issues and the Mineral Industry; Developments in International Minerals Trade and Investment; Ocean Mining; and The Development of New Tools for Energy and Minerals Policy Analysis. (MCW)

  19. Regulation of bone mineral loss during lactation

    Science.gov (United States)

    Brommage, R.; Deluca, H. F.

    1985-01-01

    The effects of varyng dietary calcium and phosphorous levels, vitamin D deficiency, oophorectomy, adrenalectomy, and simultaneous pregnancy on bone mineral loss during lactation in rats are studied. The experimental procedures and evaluations are described. The femur ash weight of lactating and nonlactating rats are calculated. The data reveals that a decrease in dietary calcium of 0.02 percent results in an increased loss of bone mineral, an increase in calcium to 1.4 percent does not lessen bone mineral loss, and bone mineral loss in vitamin D deficient rats is independent of calcium levels. It is observed that changes in dietary phosphorous level, oophorectomy, adrenalectomy, and simultaneous pragnancy do not reduce bone mineral loss during lactation. The analysis of various hormones to determine the mechanism that triggers bone mineral loss during lactation is presented.

  20. Calculation of topological connectivity index for minerals

    Institute of Scientific and Technical Information of China (English)

    2001-01-01

    Topological method was applied firstly to calculate the topological connectivity index of minerals (TCIM). The reciprocal of effective atomic refractivity of metal dement in minerals was chosen as its valence. The reasonability of TCIM as an activity criterion was tested through comparison of TCIM with two kinds of dectronegativity parameter, i.e. ionic percentage and energy criteria of Yang's electronegativity, solubility product, energy criterion according to the gen eralized perturbation theory and adsorption of flotation reagents on the surface of minerals. The results indicated that TCIM is an effective structural parameter of minerals to study the structure-activity relationship. In addition, different mineral is of different TCIM value, so TCIM brings about convenience in comparison of flotation activity for minerals.

  1. [Darius Staliūnas. Making Russians : meaning and practice of russification in Lithuania and Belarus after 1863

    Index Scriptorium Estoniae

    Woodworth, Bradley D., 1963-

    2011-01-01

    Arvustus: Darius Staliūnas. Making Russians. Meaning and practice of russification in Lithuania and Belarus after 1863. On the boundary of two worlds: identity, freedom, and moral imagination in the Baltica, 11. (Amsterdam : Rodopi, 2007)

  2. Operational Overview for Unmanned Aircraft Systems (UAS) Integration in the National Airspace (NAS) Project Flight Test Series 3

    Science.gov (United States)

    Valkov, Steffi

    2017-01-01

    This presentation is a high level overview of the flight testing that took place in 2015 for the UAS-NAS project. All topics in the presentation discussed at a high level and no technical details are provided.

  3. [Darius Staliūnas. Making Russians : meaning and practice of russification in Lithuania and Belarus after 1863

    Index Scriptorium Estoniae

    Woodworth, Bradley D., 1963-

    2011-01-01

    Arvustus: Darius Staliūnas. Making Russians. Meaning and practice of russification in Lithuania and Belarus after 1863. On the boundary of two worlds: identity, freedom, and moral imagination in the Baltica, 11. (Amsterdam : Rodopi, 2007)

  4. 78 FR 12951 - TRICARE; Elimination of the Non-Availability Statement (NAS) Requirement for Non-Emergency...

    Science.gov (United States)

    2013-02-26

    ... as one that would result in an annual effect of $100 million or more on the national economy or which... the exception of maternity services, the ASD(HA) may require an NAS prior to TRICARE cost-sharing...

  5. Polypeptide Inhibitors of Mineral Scaling and Corrosion

    Science.gov (United States)

    1989-06-01

    peptides are based on natural protein inhibitors of mineral formation and generally are enriched in aspartic acid and phosphoserine. Specifically, the...the protein inhibitors of mineral formation , we evaluated several methods of preparation of phosphopeptides. These included direct polymerization of 2...number of assays have been developed to measure the ability of the peptides to inhibit mineral formation . These include methods for assessing effects on

  6. Role of minerals in animal health disorders

    Directory of Open Access Journals (Sweden)

    Sinovec Zlatan J.

    2005-01-01

    Full Text Available All mineral matter, essential or non-essential, can have a significant influence on production results and the health of animals, if large quantities of them are present in a feed ration. A maximally tolerant content depends on the animal specie and category. Many factors, such as physiological status (growth, lactation, etc., nutritive status, content and ratio of nutritive matter in the ration, duration of exposure, and the biological level of utilization of elements, also affect the maximally tolerant content of mineral matter in feed. The content of certain mineral matter in plant feed significantly depends on the soil factor, as well as the content and level of utilization of mineral matter from the soil. Mn, Se and Mo can be present in plant feed in such quantities as to induce toxicosis. Industrial contaminants, Cd, Pb or F, can contaminate plants, in particular their leaves, in quantities which lead to the appearance of clinical signs of conventional toxicosis. Moreover, natural water can contain large quantities of S, F, Na, Mg, or Fe, and certain mineral matter can get into water through industrial waste. In addition to the above, it is possible to cause unwanted effects through the frequent, but primarily unprofessional use of mineral additives, since it is extremely important, besides meeting the mineral requirements of each individual element, to secure a ratio among the mineral matter themselves as well as with other nutritive matter. Mineral matter present in food are in mutual interference, and these relations can be synergistic or antagonistic. The sufficiency of a large number of mineral matter has a negative effect on the utilization of other matter (conditional and/or border deficiency, while certain elements cause the clinical appearance of toxic effects. The accidental intake of large quantities of certain mineral matter is revealed as clinical signs of acute toxicosis, which is very different from chronic effects caused by

  7. Strategic Minerals: U.S. Alternatives

    Science.gov (United States)

    1990-02-01

    become one of the world’s leading industrial powers by being a mineral-short nation. It has economic reserves in all but 12 of the 71 minerals in world...Sirategic Minerals and ferroalloy industries, the chemical and petrochemical indus- tries, the machine tool industry, and the nuclear power industries...supply.4 The historical record shows a mixed picture of reliability. Since World War II. supply problems have pestered metals users. Interruptions

  8. Mineral distributions at the developing tendon enthesis.

    Directory of Open Access Journals (Sweden)

    Andrea G Schwartz

    Full Text Available Tendon attaches to bone across a functionally graded interface, "the enthesis". A gradient of mineral content is believed to play an important role for dissipation of stress concentrations at mature fibrocartilaginous interfaces. Surgical repair of injured tendon to bone often fails, suggesting that the enthesis does not regenerate in a healing setting. Understanding the development and the micro/nano-meter structure of this unique interface may provide novel insights for the improvement of repair strategies. This study monitored the development of transitional tissue at the murine supraspinatus tendon enthesis, which begins postnatally and is completed by postnatal day 28. The micrometer-scale distribution of mineral across the developing enthesis was studied by X-ray micro-computed tomography and Raman microprobe spectroscopy. Analyzed regions were identified and further studied by histomorphometry. The nanometer-scale distribution of mineral and collagen fibrils at the developing interface was studied using transmission electron microscopy (TEM. A zone (∼20 µm exhibiting a gradient in mineral relative to collagen was detected at the leading edge of the hard-soft tissue interface as early as postnatal day 7. Nanocharacterization by TEM suggested that this mineral gradient arose from intrinsic surface roughness on the scale of tens of nanometers at the mineralized front. Microcomputed tomography measurements indicated increases in bone mineral density with time. Raman spectroscopy measurements revealed that the mineral-to-collagen ratio on the mineralized side of the interface was constant throughout postnatal development. An increase in the carbonate concentration of the apatite mineral phase over time suggested possible matrix remodeling during postnatal development. Comparison of Raman-based observations of localized mineral content with histomorphological features indicated that development of the graded mineralized interface is linked

  9. Mineral resource of the month: Mica

    Science.gov (United States)

    Willett, Jason C.

    2014-01-01

    The mica mineral group includes 34 phyllosilicate minerals, all with a layered, platy texture. The mineral has been known for millennia: Mica was first mined in India about 4,000 years ago, where it was used primarily in medicines. The Mayans used it for decorative effect in stucco to make their temples sparkle in the sun. Today it is used in everything from electrical products to makeup.

  10. MINER: software for phylogenetic motif identification

    OpenAIRE

    La, David; Livesay, Dennis R.

    2005-01-01

    MINER is web-based software for phylogenetic motif (PM) identification. PMs are sequence regions (fragments) that conserve the overall familial phylogeny. PMs have been shown to correspond to a wide variety of catalytic regions, substrate-binding sites and protein interfaces, making them ideal functional site predictions. The MINER output provides an intuitive interface for interactive PM sequence analysis and structural visualization. The web implementation of MINER is freely available at . ...

  11. Mineral distributions at the developing tendon enthesis.

    Science.gov (United States)

    Schwartz, Andrea G; Pasteris, Jill D; Genin, Guy M; Daulton, Tyrone L; Thomopoulos, Stavros

    2012-01-01

    Tendon attaches to bone across a functionally graded interface, "the enthesis". A gradient of mineral content is believed to play an important role for dissipation of stress concentrations at mature fibrocartilaginous interfaces. Surgical repair of injured tendon to bone often fails, suggesting that the enthesis does not regenerate in a healing setting. Understanding the development and the micro/nano-meter structure of this unique interface may provide novel insights for the improvement of repair strategies. This study monitored the development of transitional tissue at the murine supraspinatus tendon enthesis, which begins postnatally and is completed by postnatal day 28. The micrometer-scale distribution of mineral across the developing enthesis was studied by X-ray micro-computed tomography and Raman microprobe spectroscopy. Analyzed regions were identified and further studied by histomorphometry. The nanometer-scale distribution of mineral and collagen fibrils at the developing interface was studied using transmission electron microscopy (TEM). A zone (∼20 µm) exhibiting a gradient in mineral relative to collagen was detected at the leading edge of the hard-soft tissue interface as early as postnatal day 7. Nanocharacterization by TEM suggested that this mineral gradient arose from intrinsic surface roughness on the scale of tens of nanometers at the mineralized front. Microcomputed tomography measurements indicated increases in bone mineral density with time. Raman spectroscopy measurements revealed that the mineral-to-collagen ratio on the mineralized side of the interface was constant throughout postnatal development. An increase in the carbonate concentration of the apatite mineral phase over time suggested possible matrix remodeling during postnatal development. Comparison of Raman-based observations of localized mineral content with histomorphological features indicated that development of the graded mineralized interface is linked to endochondral

  12. Genetic Types of Diamond Mineralization

    Institute of Scientific and Technical Information of China (English)

    A.A.MARAKUSHEV; 桑隆康; 等

    1998-01-01

    The paper describes the proposed models of diamond formation both in meteorites and in kimberlite and lamproite bodies.metamorphic complexes and explosive-ring structures ("astroblemes"),The diamond distribution in meteorites(chondrites,iron meteorites and ureilites)is restricted to taente-kamasite phase.The diamond generation here is tied up with the first stage of evolution of the planets,This stage is characterized by high pressure of hydrogen. leading to the formation of the planet envelope,The second stage of planet evolution began with the progressive imopoverishment of their atmospheres in hydrogen due to its predominant emission into the space and to progressive development of oxidative conditions.The model appears to have proved the relict nature of diamond mineraolization in meteorites.Diamond and other high-pressure minerals(its"satellites") were crystallized without any exception in the early intratelluric stages of peridotite and eclogite-pyroxenite magma evolution just before the magma intrusion into the higher levels of the mantle and crust where diamond is not thermodynamically stable,The ultramafic intrusive bodies(bearing rich relict diamonds)in the dase of a platform paaear to be the substrata for the formation of kimberlite-lamproite magma chambers as a result of magmatic replacement.The model explains the polyfacial nature of diamondiferous eclotgites,pyroxenites and peridotites and discusses the process of inheritance of their diamond mineralization by kimberlites and lamproites.Dimond oproductivity of metamorthic complexes is originated by the inheritance of their diamonds from the above-mentioned primary diamondiferous rocks.Large diamondiferous explosive-ring structures were formed by high-energy endogenic explosion of fluid which came from the Earth's core.This high energy differs endogenic impactogenesis from explosive volcanism.It proceeds at very high temperature to create diaplectic galsses(monomineral pseudomorphs)-the product of

  13. Composição mineral de frutos tropicais na colheita

    Directory of Open Access Journals (Sweden)

    Rúter Hiroce

    1977-01-01

    Full Text Available Amostras de diversas partes de frutos tropicais foram colhidas para estudo de sua composição mineral. Os materiais estudados foram representados por amostras de abacate "collinson", abacaxi "cayenne", banana "nanicão", castanha-do-pará, goiaba "IAC-4", jaca-dura, mamão-de-polpa-amarela, mangas "haden", "extrema" e "carlota", e maracujá flavicarpa. Para as análises químicas, os frutos foram divididos em casca, polpa e sementes (abacate e jaca; em casca + polpa e sementes (mamão e manga; em casca e polpa (abacaxi; em casca do fruto, casca de amêndoa e amêndoa (castanha-do-pará; banana, goiaba e maracujá não foram divididos. Foram calculadas as porcentagens de água nessas partes e as proporções dessas partes em relação ao fruto inteiro. Nas amostras secas dos frutos ou de suas partes foram dosados todos os nutrientes minerais das plantas, além de cobalto, alumínio e sódio. As quantidades dos elementos extraídos foram calculadas por tonelada de frutos nas condições normais de colheita. De um modo geral, nitrogênio e potássio foram os nutrientes extraídos em quantidades mais elevadas e o molibdênio, nas mais baixas. A castanha-do-pará foi o fruto que extraiu os nutrientes em quantidades mais elevadas.

  14. The history of creation and study of vitamin D medicines in the Laboratory of Medical Biochemistry of the Palladin Institute of Biochemistry of the NAS of Ukraine for 1990-2015

    Directory of Open Access Journals (Sweden)

    N. E. Lugovska

    2015-12-01

    Full Text Available The article presents the main results of inventive activity of the Laboratory of Medical Biochemistry headed by Dr. L. I. Apukhovska of the Palladin Institute of Biochemistry of the NAS of Ukraine. These researches continued the works initiated by Prof. V. P. Vendt and included development of technologies for the production of highly efficient preparations based on vitamin D3, namely “VIDEIN” in several modified forms (for prevention and treatment of rickets and rickets-like diseases in children, osteopathy of various origins, hypovitaminosis D in pregnant, mineral metabolism disorders, etc, water-soluble vitamin D3 (for prevention and treatment of rickets in children from the first months of life, “KALMIVID” and ”KALMIVID-M” (for treatment of bone tissue diseases associated with mineral metabolism disorders, the pharmaceutical composition “MEBIVID” (for treatment of osteoporosis and diseases associated with reduced bone mineral density and therapeutic vitamin-D3-E protein complex (for regulation of metabolic processes, improvement of structural and functional bone quality as well as structure and function of epiphyseal cartilage. All products are characterized by stability of vitamin D3 molecule, and thus, dosing accuracy and reliability, whilst not containing toxic preservatives and stabilizers. The technologies for production as well as analytical and normative documentations have been developed for all preparations.

  15. Strongly polarized quantum-dot-like light emitters embedded in GaAs/GaNAs core/shell nanowires

    OpenAIRE

    Filippov, Stanislav; Jansson, Mattias; Stehr, Jan Eric; Palisaitis, Justinas; Persson, Per O.Å.; Ishikawa, Fumitaro; Chen, Weimin M.; Buyanova, Irina A.

    2016-01-01

    Recent developments in fabrication techniques and extensive investigations of the physical properties of III-V semiconductor nanowires (NWs), such as GaAs NWs, have demonstrated their potential for a multitude of advanced electronic and photonics applications. Alloying of GaAs with nitrogen can further enhance the performance and extend the device functionality via intentional defects and heterostructure engineering in GaNAs and GaAs/GaNAs coaxial NWs. In this work, it is shown that incorpora...

  16. TUCS/phosphate mineralization of actinides

    Energy Technology Data Exchange (ETDEWEB)

    Nash, K.L. [Argonne National Lab., IL (United States)

    1997-10-01

    This program has as its objective the development of a new technology that combines cation exchange and mineralization to reduce the concentration of heavy metals (in particular actinides) in groundwaters. The treatment regimen must be compatible with the groundwater and soil, potentially using groundwater/soil components to aid in the immobilization process. The delivery system (probably a water-soluble chelating agent) should first concentrate the radionuclides then release the precipitating anion, which forms thermodynamically stable mineral phases, either with the target metal ions alone or in combination with matrix cations. This approach should generate thermodynamically stable mineral phases resistant to weathering. The chelating agent should decompose spontaneously with time, release the mineralizing agent, and leave a residue that does not interfere with mineral formation. For the actinides, the ideal compound probably will release phosphate, as actinide phosphate mineral phases are among the least soluble species for these metals. The most promising means of delivering the precipitant would be to use a water-soluble, hydrolytically unstable complexant that functions in the initial stages as a cation exchanger to concentrate the metal ions. As it decomposes, the chelating agent releases phosphate to foster formation of crystalline mineral phases. Because it involves only the application of inexpensive reagents, the method of phosphate mineralization promises to be an economical alternative for in situ immobilization of radionuclides (actinides in particular). The method relies on the inherent (thermodynamic) stability of actinide mineral phases.

  17. Mineral elements in milk and dairy products

    Directory of Open Access Journals (Sweden)

    Šimun Zamberlin

    2012-06-01

    Full Text Available Mineral elements occur in milk and dairy products as inorganic ions and salts, as well as part of organic molecules, such as proteins, fats, carbohydrates and nucleic acids. The chemical form of mineral elements is important because it determines their absorption in the intestine and their biological utilization. The mineral composition of milk is not constant because it depends on lactation phase, nutritional status of the animal, and environmental and genetic factors. The objective of this research is to point out the research results of chemical form, content and nutritional importance of individual mineral elements that are present in various milks and dairy products.

  18. Dietary Supplements and Sports Performance: Minerals

    Directory of Open Access Journals (Sweden)

    Williams Melvin H

    2005-06-01

    Full Text Available Abstract Minerals are essential for a wide variety of metabolic and physiologic processes in the human body. Some of the physiologic roles of minerals important to athletes are their involvement in: muscle contraction, normal hearth rhythm, nerve impulse conduction, oxygen transport, oxidative phosphorylation, enzyme activation, immune functions, antioxidant activity, bone health, and acid-base balance of the blood. The two major classes of minerals are the macrominerals and the trace elements. The scope of this article will focus on the ergogenic theory and the efficacy of such mineral supplementation.

  19. Watering down the impact of mineral operations

    Energy Technology Data Exchange (ETDEWEB)

    Huxley, C.

    1998-11-01

    New guidance for mineral operators and mineral planning authorities (MPAs) has been published by environmental consultants Symonds Travers Morgan on behalf of the Department of the Environment, Transport and the Regions (DETR) in a report called Reducing the effects of surface mineral workings on the water environment: a guide to good practice? The article explains its significance to mineral operators. The report highlights problems caused by opencast coal extraction, large-scale quarrying of limestone and chalk from major Karstic aquifers and sand and gravel workings in river flood planes. 1 ref., 6 photos.

  20. MINER: software for phylogenetic motif identification.

    Science.gov (United States)

    La, David; Livesay, Dennis R

    2005-07-01

    MINER is web-based software for phylogenetic motif (PM) identification. PMs are sequence regions (fragments) that conserve the overall familial phylogeny. PMs have been shown to correspond to a wide variety of catalytic regions, substrate-binding sites and protein interfaces, making them ideal functional site predictions. The MINER output provides an intuitive interface for interactive PM sequence analysis and structural visualization. The web implementation of MINER is freely available at http://www.pmap.csupomona.edu/MINER/. Source code is available to the academic community on request.

  1. Multiphase Sequestration Geochemistry: Model for Mineral Carbonation

    Energy Technology Data Exchange (ETDEWEB)

    White, Mark D.; McGrail, B. Peter; Schaef, Herbert T.; Hu, Jian Z.; Hoyt, David W.; Felmy, Andrew R.; Rosso, Kevin M.; Wurstner, Signe K.

    2011-04-01

    Carbonation of formation minerals converts low viscosity supercritical CO2 injected into deep saline reservoirs for geologic sequestration into an immobile form. Until recently the scientific focus of mineralization reactions with reservoir rocks has been those that follow an aqueous-mediated dissolution/precipitation mechanism, driven by the sharp reduction in pH that occurs with CO2 partitioning into the aqueous phase. For sedimentary basin formations the kinetics of aqueous-mediated dissolution/precipitation reactions are sufficiently slow to make the role of mineralization trapping insignificant over a century period. For basaltic saline formations aqueous-phase mineralization progresses at a substantially higher rate, making the role of mineralization trapping significant, if not dominant, over a century period. The overlooked mineralization reactions for both sedimentary and basaltic saline formations, however, are those that occur in liquid or supercritical CO2 phase; where, dissolved water appears to play a catalyst role in the formation of carbonate minerals. A model is proposed in this paper that describes mineral carbonation over sequestration reservoir conditions ranging from dissolved CO2 in aqueous brine to dissolved water in supercritical CO2. The model theory is based on a review of recent experiments directed at understanding the role of water in mineral carbonation reactions of interest in geologic sequestration systems occurring under low water contents.

  2. Mineral Facilities of Latin America and Canada

    Science.gov (United States)

    Bernstein, Rachel; Eros, Mike; Quintana-Velazquez, Meliany

    2006-01-01

    This data set consists of records for over 900 mineral facilities in Latin America and Canada. The mineral facilities include mines, plants, smelters, or refineries of aluminum, cement, coal, copper, diamond, gold, iron and steel, nickel, platinum-group metals, salt, and silver, among others. Records include attributes such as commodity, country, location, company name, facility type and capacity if applicable, and generalized coordinates. The data were compiled from multiple sources, including the 2003 and 2004 USGS Minerals Yearbooks (Latin America and Candada volume), data to be published in the 2005 Minerals Yearbook Latin America and Canada Volume, minerals statistics and information from the USGS minerals information Web site (minerals.usgs.gov/minerals), and data collected by USGS minerals information country specialists. Data reflect the most recent published table of industry structure for each country. Other sources include statistical publications of individual countries, annual reports and press releases of operating companies,and trade journals. Due to the sensitivity of some energy commodity data, the quality of these data should be evaluated on a country-by-country basis. Additional information and explanation is available from the country specialists.

  3. ROCKS & MINERALS DETERMINATION AND ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    2009-01-01

    <正>20091570 Ge Yunjin(College of Geo-Resource and Information,China University of Petroleum,Dongying 257061,China);Chen Yong Advance in Low Temperature Phase Transition and Raman Spectrum Technique in Composition Determination of Fluid Inclusions(Rock and Mineral Analysis,ISSN0254-5357,CN11-2131/TD,27(3),2008,p.207-210,22 refs.)Key words:fluid inclusions,Raman spectraThe principle and development of low-temperature analytical techniques for fluid inclusions were expounded.The traditional low-temperature analytical technology mainly focused on the measurement of inorganic salt using congealed microthermometry,but now it is developed to semi-quantitative and quantitative analysis of fluid inclusions using in-situ cryogenic Raman spectrometry.

  4. Leptin and bone mineral density

    DEFF Research Database (Denmark)

    Morberg, Cathrine M.; Tetens, Inge; Black, Eva

    2003-01-01

    Leptin has been suggested to decrease bone mineral density (BMD). This observational analysis explored the relationship between serum leptin and BMD in 327 nonobese men (controls) (body mass index 26.1 +/- 3.7 kg/m(2), age 49.9 +/- 6.0 yr) and 285 juvenile obese men (body mass index 35.9 +/- 5.9 kg....../m(2), age 47.5 +/- 5.1 yr). Whole-body dual-energy x-ray absorptiometry scan measured BMD, fat mass, and lean mass. Fasting serum leptin (nanograms per milliliter) was strongly associated with fat mass (kilograms) in both controls (r = 0.876; P ....001). An inverse relation between BMD adjusted for body weight and serum leptin emerged in both the control group (r = -0.186; P

  5. Reducing the extraction of minerals

    DEFF Research Database (Denmark)

    Bouzon, Marina; Govindan, Kannan; Rodriguez, Carlos Manuel Taboada

    2015-01-01

    the Multi-Criteria Decision Making (MCDM) tool named Interpretive Structural Modeling (ISM) to evaluate the relationship between the barrier categories. Logistics experts from machinery manufacturing industry sector in Brazil were consulted. The greater influence on all barrier categories is Policy related......Mass consumption and shortening product lifecycles have increased worldwide production. Consequently, more raw materials such as minerals are used, and available landfills are filling up. Companies are urged to effectively incorporate sustainability issues such as End-of-life (EOL) management...... and Reverse Logistics (RL) practices to close the loop and diminish the amount of raw materials used in their production systems. However, implementing RL implies dealing with its barriers. The purpose of this article is to focus on the recovery of EOL products that use mostly raw materials from the mining...

  6. Aggregate and Mineral Resources, This data set consists of mineral deposit areas (KMDAs) for locatable minerals., Published in 1993, Arizona State Land Department.

    Data.gov (United States)

    NSGIC GIS Inventory (aka Ramona) — This Aggregate and Mineral Resources dataset as of 1993. It is described as 'This data set consists of mineral deposit areas (KMDAs) for locatable minerals.'. Data...

  7. Geology, geochemistry, geophysics, mineral occurrences, and mineral resource assessment for the commonwealth of Puerto Rico

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Geologic map with faults, along with additional scientific information needed for mineral resource assessment (geochemical analyses, mineral occurrences, geologic...

  8. Minerals in the world economy. Minerals yearbook Volume 3. 1992 international review

    Energy Technology Data Exchange (ETDEWEB)

    1992-01-01

    This edition of the Minerals Yearbook discusses the performance of the worldwide minerals and materials industry during 1992 and provides background information to assist in interpreting that performance. Content of the individual Yearbook volumes follows: Volume I, Metals and Minerals, contains chapters on virtually all metallic and industrial mineral commodities important to the U.S. economy. Volume II, Area Reports: Domestic, contains chapters on the minerals industry of each of the 50 States, Puerto Rico, Northern Marianas, Island Possessions, and Trust Territory. Volume III, Minerals Yearbook--International Review contains the latest available mineral data on more than 175 foreign countries and discusses the importance of minerals to the economies of these nations.

  9. Relações pedomorfogeológicas nas chapadas elevadas do Distrito Federal Pedomorphogeological relations in the chapadas elevadas of the Distrito Federal, Brazil

    Directory of Open Access Journals (Sweden)

    Inara Oliveira Barbosa

    2009-10-01

    Full Text Available A caracterização pedológica e o entendimento das relações entre pedologia, geologia e geomorfologia são importantes para a compreensão da distribuição dos solos numa paisagem. O objetivo deste estudo foi avaliar as relações pedomorfogeológicas na região das Chapadas Elevadas do Distrito Federal (DF, mediante caracterização química, física, mineralógica e geoquímica dos solos de ocorrência nesse compartimento da paisagem. Foram selecionadas duas topossequências representativas da distribuição pedológica nas Chapadas Elevadas do DF, cujos solos foram formados a partir de rochas metassedimentares do Grupo Paranoá, representados por Latossolos Vermelhos (LV, Latossolos Vermelho-Amarelos (LVA e Cambissolos (C. Os Latossolos das duas topossequências apresentaram a maioria dos atributos físicos, químicos e mineralógicos semelhantes. A variação da cor nesses Latossolos é proveniente da mineralogia diferenciada dos óxidos de Fe - hematita predominante nos LV e goethita nos LVA. No entanto, as análises por meio de ICP-AES apresentaram teores de Fe2O3 similares nos Latossolos, demonstrando material de origem (rochas metassedimentares de composição geoquímica semelhante. A formação da goethita nos LVA foi considerada dependente da sua posição geomorfológica de desenvolvimento, nas bordas das chapadas, onde a oscilação do lençol freático proporcionou a formação de horizonte litoplíntico, com consequente deficiência das condições de drenagem. Os Cambissolos apresentaram-se quimicamente semelhantes aos Latossolos em razão do material de origem, que são rochas metassedimentares já pré-intemperizadas. O estudo das relações pedomorfogeológicas permitiu constatar que a distribuição dos solos nas Chapadas Elevadas do Distrito Federal é condicionada pela evolução geomorfológica e pela geologia da região.Detailed studies of pedologic characterization, as well as of relationships between pedology

  10. European mineral statistics 2009-13 : a product of the World Mineral Statistics database

    OpenAIRE

    Brown, T. J.; Hobbs, S.F.; Mills, A. J.; Idoine, N.E.; Wrighton, C.E.

    2015-01-01

    This volume is the latest edition of a series that began in 2002 following the replacement of ‘World Mineral Statistics’ with ‘World Mineral Production’. It contains mineral production, import and export data for more than 70 mineral commodities, for 36 European countries including all EU Member States and EU Candidate Countries, plus Norway and Switzerland. These data are presented in two sections: by individual country and by commodity; the latter is illustrated by graphics. It remains the ...

  11. European Mineral Statistics 2010-14: a product of the World Mineral statistics database

    OpenAIRE

    Brown, T. J.; Hobbs, S.F.; Idoine, N.E.; Mills, A. J.; Wrighton, C.E.; Raycraft, E.R.

    2016-01-01

    European Mineral Statistics provides statistical information about minerals and metals in Europe. It provides the essential background intelligence for any European minerals-related activities. Production, export and import tables are presented for all EU members and EU candidate countries, plus Norway and Switzerland, in two sections: •by individual country •by commodity, with bullets on salient features and graphics More than 70 different mineral commodities are included from ...

  12. Minerals yearbook: Mineral industries of latin America and Canada. Volume 3. 1993 international review. Annual report

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1993-12-31

    This edition of the Mineral Yearbook records the performance of the worldwide minerals industry during 1993 and provides background information to assist in interpreting that performance. Volume II, Area Reports: Domestic, contains chapters on the minerals industry of each of the 50 States and Puerto Rico, Northern Marianas, Island Possessions, and Trust Territory. This volume also has a chapter on survey methods used in data collection, including a statistical summary of domestic nonfuel minerals.

  13. Different supplementation of minerals in bats and the consequences on bone mineral density

    OpenAIRE

    2006-01-01

    We investigated the consequences of mineral supplementation of mealworms at a facility where mustached bats (Pteronotus parnellii rubiginosus) from Trinidad were kept for experimental purposes. For 11 months after capture from the wild, the animals were constantly housed indoors and fed a diet of mealworms without mineral supplementation. After several animals died with skulls soft at palpation, this diet was suspected to be mineral deficient. From then on, mealworms were placed on a mineral ...

  14. The nanophase iron mineral(s) in Mars soil

    Science.gov (United States)

    Banin, A.; Ben-Shlomo, T.; Margulies, L.; Blake, D. F.; Mancinelli, R. L.; Gehring, A. U.

    1993-01-01

    A series of surface-modified clays containing nanophase (np) iron oxide/oxyhydroxides of extremely small particle sizes, with total iron contents as high as found in Mars soil, were prepared by iron deposition on the clay surface from ferrous chloride solution. Comprehensive studies of the iron mineralogy in these "Mars-soil analogs" were conducted using chemical extractions, solubility analyses, pH and redox, x ray and electron diffractometry, electron microscopic imaging, specific surface area and particle size determinations, differential thermal analyses, magnetic properties characterization, spectral reflectance, and Viking biology simulation experiments. The clay matrix and the procedure used for synthesis produced nanophase iron oxides containing a certain proportion of divalent iron, which slowly converts to more stable, fully oxidized iron minerals. The clay acted as an effective matrix, both chemically and sterically, preventing the major part of the synthesized iron oxides from ripening, i.e., growing and developing larger crystals. The precipitated iron oxides appear as isodiametric or slightly elongated particles in the size range 1-10 nm, having large specific surface area. The noncrystalline nature of the iron compounds precipitated on the surface of the clay was verified by their complete extractability in oxalate. Lepidocrocite (gamma-FeOOH) was detected by selected area electron diffraction. It is formed from a double iron Fe(II)/Fe(III) hydroxy mineral such as "green rust," or ferrosic hydroxide. Magnetic measurements suggested that lepidocrocite converted to the more stable maghemite (gamma-Fe2O3) by mild heat treatment and then to nanophase hematite (alpha-Fe2O3) by extensive heat treatment. After mild heating, the iron-enriched clay became slightly magnetic, to the extent that it adheres to a hand-held magnet, as was observed with Mars soil. The chemical reactivity of the iron-enriched clays strongly resembles, and offers a plausible mechanism

  15. Lipoproteínas remanentes aterogénicas en humanos

    Directory of Open Access Journals (Sweden)

    Regina Wikinski

    2010-08-01

    Full Text Available La lipoproteínas remanentes (RLPs son el producto de la lipólisis de los triglicéridos transportados por las lipoproteínas de baja densidad (VLDL de origen hepático e intestinal y de los quilomicrones intestinales. Dicha lipólisis es catalizada por la lipoproteína lipasa y se produce en pasos sucesivos, de manera que los productos son heterogéneos. Su concentración plasmática en ayunas es pequeña en pacientes normolipémicos y aumenta en el estado post-prandial. Las alteraciones genéticas en subtipos de su componente Apo-E aumentan notablemente su concentración plasmática y producen el fenotipo de disbetalipoproteinemia. Se las considera aterogénicas porque injurian el endotelio, sufren estrés oxidativo, son captadas por los macrófagos en el subendotelio vascular y generan las células espumosas que son precursoras de ateromas. Su origen metabólico, como productos de varios tipos de lipoproteínas, explican su estructura heterogénea, sus concentraciones plasmáticas variables y las dificultades metodológicas que dificultan su inclusión en el perfil lipoproteico como parte de los estudios epidemiológicos. Los últimos avances en los estudios metabólicos y la actualización de su papel clínico, justifican una revisión de los conocimientos actuales.

  16. Crescimento econômico nas cidades médias brasileiras

    Directory of Open Access Journals (Sweden)

    Thompson A. Andrade

    2013-11-01

    Full Text Available As cidades médias brasileiras mostraram um variado desempenho produtivo nas décadas de setenta e de oitenta, conforme medido pela variação do pessoal ocupado nas mesmas. O objetivo deste trabalho é verificar como tal desempenho se mostrou diferente em termos de algumas características estruturais que estas cidades apresentavam no ano inicial de cada década. Isto é feito através de análises de regressão, usando-se como características variáveis que procuram representar diferenças de dimensão demográfica, de grau de industrialização, de nível de renda e de sua desigualdade, de nível educacional, de oferta de infra-estrutura, de nível de dispêndio público e de mercado. Além destas variáveis, um controle é feito para atributos de região, de localização espacial (metropolitana e não-metropolitana e de escala urbana. Regressões também foram rodadas da mesma forma para verificar como as mesmas características servem para discrimimu' estas cidades em termos das variações de rendimento da renda total nas mesmas. O resultado obtido indica que o conjunto escolhido de características mostrou-se extremamente relevante para explicar as diferenças de performance.

  17. CLUSIACEAE LINDL. E HYPERICACEAE JUSS. NAS RESTINGAS DO ESTADO DO PARÁ, AMAZÔNIA ORIENTAL, BRASIL

    Directory of Open Access Journals (Sweden)

    Thiago Teixeira de Oliveira

    2015-12-01

    Full Text Available O estudo teve como objetivo o tratamento florístico-taxonômico de Clusiaceae e Hypericaceae para as restingas do Estado do Pará. O material foi obtido nos acervos dos Herbários do Museu Paraense Emílio Goeldi (MG, Embrapa Amazônia Oriental (IAN e coletas realizadas na praia do Crispim, Marapanim-PA. As descrições das espécies foram fundamentadas nas características morfológicas e em suas respectivas variações para a flora, foi elaborada uma chave para identificação das mesmas. As famílias encontram-se representadas por quatro táxons, onde Clusiaceae é composta por Clusia fockeana Miq., C. hoffmannseggiana Schltdl., e C. panapanari (Aubl. Choisy., e Hypericaceae apenas por Vismia guianensis (Aubl. Choisy. C. panapanari apresenta-se restrita à formação de mata de restinga. C. hoffmannseggiana e V. guianensis apresentaram distribuição mais ampla nas restingas paraenses. No levantamento feito na coleção nos herbários, constatou-se que coletas, das famílias nas restingas paraenses, ainda são escassas e o esforço de coletas poderá trazer mais informações sobre período de floração e frutificação, além de um provável incremento de novos registros para a área de estudo. Palavras-chave: Cebola brava, Litoral paraense, Taxonomia. DOI: http://dx.doi.org/10.18561/2179-5746/biotaamazonia.v5n4p15-21

  18. 2ª. CONFERÊNCIA: PARRHESIA NAS TRAGÉDIAS DE EURÍPIDES

    Directory of Open Access Journals (Sweden)

    Michel Foucault

    2013-10-01

    Full Text Available Hoje eu gostaria de começar analisando as primeiras ocorrências da palavraparrhesia na literatura grega, como a palavra aparece nas seguintes seis tragédias deEurípides:(1 Fenícias; (2 Hipólito; (3 As Bacantes; (4 Electra; (5 Íon; (6 Orestes.Nas primeiras quatro peças, a parrhesia não constitui um tópico importante outema; mas a própria palavra geralmente ocorre num contexto preciso que nos ajuda noentendimento de seu significado. Nas últimas duas peças – Íon e Orestes – a parrhesiaassume um papel muito importante. De fato, eu penso que Íon é inteiramente consagradoao problema da parrhesia, uma vez que investiga a questão: Quem tem o direito, o devere a coragem de falar a verdade? Esse problema parrhesiástico em Íon é levantado naestrutura das relações entre os deuses e os seres humanos. Em Orestes – que foi escritodez anos mais tarde e, por essa razão, é uma das últimas peças de Eurípides – o papel daparrhesia não é nem de longe tão significativo. E ainda assim a peça contém uma cenaparrhesiástica que garante a atenção na medida em que é diretamente relacionada aquestões políticas que os atenienses estavam então levantando. Aqui, nessa cenaparrhesiástica, há uma transição concernente à questão da parrhesia tal como ela ocorreno contexto das instituições humanas. Especificamente, a parrhesia é vista como umaquestão tanto política quanto filosófica.

  19. The CAS-NAS forum for new leaders in space science

    Science.gov (United States)

    Smith, David H.

    The space science community is thoroughly international, with numerous nations now capable of launching scientific payloads into space either independently or in concert with others. As such, it is important for national space-science advisory groups to engage with like-minded groups in other spacefaring nations. The Space Studies Board of the US National Academy of Sciences' (NAS') National Research Council has provided scientific and technical advice to NASA for more than 50 years. Over this period, the Board has developed important multilateral and bilateral partnerships with space scientists around the world. The primary multilateral partner is COSPAR, for which the Board serves as the US national committee. The Board's primary bilateral relationship is with the European Science Foundation’s European Space Science Committee. Burgeoning Chinese space activities have resulted in several attempts in the past decade to open a dialogue between the Board and space scientists in China. On each occasion, the external political environment was not conducive to success. The most recent efforts to engage the Chinese space researchers began in 2011 and have proved particularly successful. Although NASA is currently prohibited from engaging in bilateral activities with China, the Board has established a fruitful dialogue with its counterpart in the Chinese Academy of Sciences (CAS). A joint NAS-CAS activity, the Forum for New Leaders in Space Science, has been established to provide opportunities for a highly select group of young space scientists from China and the United States to discuss their research activities in an intimate and collegial environment at meetings to be held in both nations. The presentation will describe the current state of US-China space relations, discuss the goals of the joint NAS-CAS undertaking and report on the activities at the May, 2014, Forum in Beijing and the planning for the November, 2014, Forum in Irvine, California.

  20. Seletividade de herbicidas aplicados nas gramas Santo Agostinho e Esmeralda Selectivity of herbicides applied on St. Augustinegrass and Emerald turfs

    Directory of Open Access Journals (Sweden)

    N.V. Costa

    2010-01-01

    Full Text Available Objetivou-se neste trabalho avaliar a seletividade de herbicidas aplicados nas gramas Santo Agostinho (Stenotaphrum secundatum e Esmeralda (Zoysia japonica em condições de campo. O delineamento experimental utilizado foi o de blocos casualizados, com quatro repetições. As gramas foram cortadas a 3 cm de altura e, em seguida, foram feitas as aplicações dos herbicidas. Os tratamentos utilizados foram: testemunha sem aplicação, fluazifop-p-butil (125 g ha-1, sethoxydim+óleo mineral (276 g ha-1 + 0,5% v v-1 de Assist, bispyribac-sodium (25 g ha-1, chlorimuron-ethyl (15 g ha-1, ethoxysulfuron (150 g ha-1, halosulfuron (112,5 g ha-1, iodosulfuron-methyl (10 g ha-1, metsulfuron-methyl (2,4 g ha-1, nicosulfuron (125 g ha-1, pyrithiobac-sodium (140 g ha-1, trifloxysulfuron-sodium (22,5 g ha-1, 2,4-D (720 g ha-1, quinclorac (375 g ha-1, atrazina (1.250 g ha-1, bentazon (600 g ha-1, linuron (1.350 g ha-1, fomesafen (187,5 g ha-1, lactofen (120 g ha-1, oxadiazon (600 g ha-1 e oxyfluorfen (720 g ha-1. Os herbicidas que apresentaram potencial de seletividade para o gramado de S. secundatum foram: os inibidores da ALS chlorimuron-ethyl, ethoxysulfuron, halosulfuron, iodosulfuron-methyl e metsulfuron-methyl, o mimetizador de auxina 2,4-D, os inibidores do fotossistema II atrazina e bentazon, bem como os inibidores da Protox fomesafen, lactofen e o oxadiazon. Para o gramado de Z. japonica, os herbicidas que apresentaram potencial de seletividade foram: os inibidores da ALS chlorimuron-ethyl, ethoxysulfuron, halosulfuron, metsulfuron-methyl e nicosulfuron, os mimetizadores de auxina 2,4-D e quinclorac, os inibidores do fotossistema II atrazina e bentazon, além dos inibidores da Protox fomesafen, lactofen e o oxadiazon.The objective of this study was to evaluate the selectivity of herbicides applied on turfgrasses St. Augustinegrass (Stenotaphrum secundatum and Emerald (Zoysia japonica under field conditions. The experimental design was randomized blocks

  1. EXTRATERRESTRIAL MINERALS AND FUTURE FRONTIERS IN MINERAL EXPLORATION

    Directory of Open Access Journals (Sweden)

    WILMER GIRALDO

    2013-01-01

    Full Text Available Debido a las altas tasas de consumo de minerales y el alto crecimiento de la población humana, los recursos minerales en el planeta Tierra se encuentran en proceso de agotamiento, esta escasez crea la necesidad de encontrar nuevas alternativas para suplir las crecientes necesidades. Una alternativa adicional a la tradicional búsqueda de nuevos yacimientos en la tierra, es la búsqueda de yacimientos más allá de nuestro planeta, estos nuevos recursos se pueden buscar en la vecindad de nuestro planeta. La extracción en cuerpos de nuestro sistema solar como la Luna, Marte y el cinturón de asteroides puede proporcionar abundantes recursos energéticos como el helio 3 y minerales como el potasio, elementos de tierras raras, hierro y minerales del grupo del platino. Ahora, algunas compañías están planeando esta exploración y para los geólogos y profesionales de la minería en general, esto abre grandes posibilidades para la investigación científica, innovación tecnológica y desarrollo profesional en nuevos campos.

  2. A ciência nas utopias de Campanella, Bacon, Comenius, e Glanvill

    Directory of Open Access Journals (Sweden)

    Bernardo Jefferson de Oliveira

    2002-12-01

    Full Text Available Este artigo analisa comparativamente o papel que a ciência e a técnica ocupam nas sociedades descritas em A cidade do Sol de Tommasio Campanella, a Nova Atlântida de Francis Bacon, Panorthosia de Jan Amós Comenius e o Complemento à Nova Atlântida de Joseph Glanvill.This article evaluates the role that science and technology plays in the societies described by early modern utopias, making a comparative analysis of Tommasio Campanella's City of Sun, Francis Bacon's New Atlantis, Jan Amós Comenius' Panorthosia, and Joseph Glanvill's The summe of my lord Bacon's New Atlantis.

  3. The study of exoplanets and protoplanetary discs in the Main astronomical observatory of NAS of Ukraine

    Science.gov (United States)

    Kuznyetsova, Yu. G.; Krushevska, V. N.; Zakhozhay, O. V.; Matsiaka, O. M.; Vidmachenko, A. P.; Shliakhetskaya, Ya. O.; Andreev, M. V.; Romaniuk, Ya. O.

    2016-10-01

    Long-term spectral and photometric observations of transit and nontransit exoplanet systems are carried out in MAO NAS of Ukraine. On the base of obtained data we study the influence of exoplanets on chromospherical activity of the host stars, model the light curves, calculate exoplanet system's parameters and search planets in eclipsing binary star's systems. In the field of protoplanetary disc researches it was developed a new algorithm for calculation of the energy distribution in spectra of systems containing a spherical central source and a surrounding protoplanetary disc.

  4. Hegemonia e contra-hegemonia nas artes de curar oitocentistas brasileiras

    OpenAIRE

    Almeida, Diádiney Helena de

    2010-01-01

    No decorrer da primeira metade do século XIX, os curadores populares que atuavam no Rio de Janeiro estiveram inseridos num processo de desqualificação de seus saberes de cura, ao mesmo tempo em que a medicina acadêmica empreendia um projeto de construção da sua hegemonia nas artes de curar. Objetiva-se aqui ampliar a compreensão sobre os curadores que nunca se licenciaram e, por fim, sobre todos os curadores que tiveram suas práticas de cura desqualificadas a partir de então. Busca-se demonst...

  5. Estudo da morfologia e dos achados radiograficos nas articulações temporomandibulares de pacientes sintomaticos

    OpenAIRE

    Luciane Farias de Araujo

    2000-01-01

    Resumo: Quarenta e seis pacientes com sinais e sintomas de desordens temporomandibulares (DTMs) foram examinados clinicamente e por meio de tomografia convencional hipocicloidal em norma lateral, nas posições de máxima intercuspidação e abertura máxima bucal. Foram investigadas, em 92 articulações, a freqüência e localização de alterações ósseas condilares, bem como o posicionamento condilar em relação a fossa mandibular, a largura e altura da fossa mandibular, a excursão condilar, angulação ...

  6. Proteínas inmunodominantes de Brucella Melitensis evaluadas por Western Blot

    Directory of Open Access Journals (Sweden)

    Elizabeth Anaya

    1997-01-01

    Full Text Available Se separaron extractos de proteínas totales de Brucella melitensis en gel 15% SDS-PAGE. Su seroreactividad fue analizada por Western Blot con resultados satisfactorios. Para éste propósito sueros controles negativos (n=03, sueros de pacientes con brucelosis (n=34, cólera (n=12, tifoidea (n=02 y tuberculosis (n=02 fueron usados. Esta prueba inmunodiagnóstica detectó bandas seroreactivas altamente específicas (100% correspondientes a 8,14,18, un complejo de 25-48 y 58kDa. La sensibilidad del test fue del 90% usando los sueros antes mencionados.

  7. Modelo estocástico para la traducción de proteínas

    OpenAIRE

    González Amezcua, Omar; López Olivares, Alberto

    2013-01-01

    Se propone un marco teórico que permite modelar y estudiar la traducción de proteínas por parte del complejo molecular denominado polisoma. El modelo es muy general y no incluye detalles específicos de la compleja bioquímica realizada por el sistema. Partiendo de una ecuación estocástica para la función de probabilidad del número de ribosomas a un tiempo dado, se calcula su densidad como función de la longitud de la cadena de ARNm. Se analiza además la dependencia en cadenas con secuencia...

  8. Escutando a adolescência nas grandes cidades através do grafite

    Directory of Open Access Journals (Sweden)

    Rodrigo Lages e Silva

    Full Text Available Este trabalho faz uma apreciação do fenômeno do grafite nas grandes cidades, contextualizando o protagonismo adolescente na atividade da grafitagem como uma forma de resistência aos processos de exclusão postos em prática no capitalismo.No seu decurso, descobrimos o grafite como uma ação de cidadania na qual os adolescentes, na contramão do estilo de vida que vem sendo produzido pela modernidade, conseguem engajar-se.

  9. High power frequency doubled GaInNAs semiconductor disk laser emitting at 615 nm.

    Science.gov (United States)

    Härkönen, Antti; Rautiainen, Jussi; Guina, Mircea; Konttinen, Janne; Tuomisto, Pietari; Orsila, Lasse; Pessa, Markus; Okhotnikov, Oleg G

    2007-03-19

    We report on an optically-pumped intracavity frequency doubled GaInNAs/GaAs -based semiconductor disk laser emitting around 615 nm. The laser operates at fundamental wavelength of 1230 nm and incorporates a BBO crystal for light conversion to the red wavelength. Maximum output power of 172 mW at 615 nm was achieved from a single output. Combined power from two outputs was 320 mW. The wavelength of visible emission could be tuned by 4.5 nm using a thin glass etalon inside the cavity.

  10. Modelo estocástico para la traducción de proteínas

    OpenAIRE

    González Amezcua, Omar; López Olivares, Alberto

    2013-01-01

    Se propone un marco teórico que permite modelar y estudiar la traducción de proteínas por parte del complejo molecular denominado polisoma. El modelo es muy general y no incluye detalles específicos de la compleja bioquímica realizada por el sistema. Partiendo de una ecuación estocástica para la función de probabilidad del número de ribosomas a un tiempo dado, se calcula su densidad como función de la longitud de la cadena de ARNm. Se analiza además la dependencia en cadenas con secuencia...

  11. A ciência nas utopias de Campanella, Bacon, Comenius, e Glanvill

    OpenAIRE

    2002-01-01

    Este artigo analisa comparativamente o papel que a ciência e a técnica ocupam nas sociedades descritas em A cidade do Sol de Tommasio Campanella, a Nova Atlântida de Francis Bacon, Panorthosia de Jan Amós Comenius e o Complemento à Nova Atlântida de Joseph Glanvill.This article evaluates the role that science and technology plays in the societies described by early modern utopias, making a comparative analysis of Tommasio Campanella's City of Sun, Francis Bacon's New Atlantis, Jan Amós Comeni...

  12. Estrategias de obtención de proteínas recombinantes en Escherichia coli

    OpenAIRE

    José García; Zeila Santana; Lourdes Zumalacárregui; Marisel Quintana; Diamilé González; Gustavo Furrazola; Oscar Cruz

    2013-01-01

    La expresión de proteínas recombinantes se ha favorecido con el uso de Escherichia coli debido a su relativo bajo costo, alta densidad de cultivo, su fácil manipulación genética y a las diversas herramientas biotecnológicas disponibles que son compatibles. En este artículo se presentan algunas estrategias para la expresión de Escherichia coli; se destacan factores genéticos y fisiológicos que incluyen: número de copias del vector de expresión, características del gen, estabilidad del ácido ri...

  13. O foro competente nas causas matrimoniais segundo a instrução Dignitas Connubii

    Directory of Open Access Journals (Sweden)

    Orsi, João Carlos

    2006-01-01

    Full Text Available A instrução Dignitas Connubii apresenta as normas que devem ser observadas nos tribunais eclesiásticos, dada para ser um vademecum para juízes e ministros dos tribunais, visando dar um tratamento mais veloz e seguro às causas de nulidade matrimonial. Importa observar que a Instrução recolhe todo o material extracodicial referente ao foro competente nas referidas causas matrimoniais. Tal informação é de grande importância para a justiça eclesiástica

  14. Estudio Electroforético de las Proteínas del Jugo Gástrico.

    OpenAIRE

    Oporto Ruiz, Tomás

    2017-01-01

    Esta Tesis Doctoral ha sido dividida en seis apartados, epigrafiados en seis capítulos. En el primero se da noticia de los antecedentes previos a nuestro trabajo sobre el fraccionamiento electroforético de las proteínas de la secreción gástrica; se exponen los motivos que nos impulsaron a realizar nuestras investigaciones. Se concluye expresando nuestros propósitos y el resultado que nos proponemos conseguir. El segundo capítulo se dedica...

  15. Influência da forma dos agregados miúdos nas propriedades do concreto

    OpenAIRE

    Fabro,F.; Gava,G. P.; Grigoli,H. B.; Meneghetti,L. C.

    2011-01-01

    Os agregados miúdos utilizados na produção de concretos são basicamente as areias naturais provenientes dos leitos dos rios e os agregados artificiais oriundos da britagem de rocha. A principal diferença entre estes dois agregados está no formato de seus grãos. O objetivo principal deste trabalho é avaliar o formato dos grãos de agregados miúdos por meio de diferentes parâmetros, analisando as diferenças entre as formas dos agregados, e suas conseqüências nas propriedades das argamassas...

  16. proteínas de matriz de esmalte vs Regeneração tecidular guiada

    OpenAIRE

    Pereira, Sylvie Gomes

    2011-01-01

    Trabalho apresentado à Universidade Fernando Pessoa como parte dos requisitos para obtenção do grau de Mestre em Medicina Dentária. Objectivo: Comparar a eficácia da regeneração tecidular guiada com as proteínas de matriz de esmalte quando aplicadas no tratamento de defeitos ósseos e lesões de furca, bem como avaliar um possível benefício na sua utilização conjunta. Material e métodos: A realização deste trabalho foi efectuada a partir da recolha de diversos estudos publicados entre 199...

  17. Mecanoproteínas TRP(transient-receptor potencial) y movimiento dentario

    OpenAIRE

    Broseta Collado, Laura

    2012-01-01

    Algunos miembros de la familia de los canales iónicos TRP (transient receptor potential) funcionan como proteínas en una amplia variedad de tejidos y células. En el presente estudio se han utilizado técnicas de inmunohistoquímica para analizar la presencia de la mecano-proteína TRPV4 en el ligamento periodontal del primer molar superior de la rata en condiciones de normalidad y sometido a tracción ortodóncica (50 g) durante 10 días. En el diente control la inmunorreacción para TRPV4 es escasa...

  18. Mecanoproteínas ASIC y movimiento dentario: bases de la mecanotransducción

    OpenAIRE

    Stan, Claudia

    2012-01-01

    Algunas proteínas de la familia de las degenerinas/ENaC, especialmente los ASIC (canales iónicos sensibles a ácido), funcionan como sensores generales y como mecanosensores, o pueden ser necesarios para la mecanosensación, en una amplia gama de especies y tipos celulares. En el presente trabajo se investigó mediante técnicas de inmunohistoquímica la expresión del canal iónico ASIC2 en el ligamento periodontal del primer molar superior de rata, en condiciones de normalidad y tras someter el ...

  19. Materiales biodegradables en base a proteínas de soja y montmorillonitas

    OpenAIRE

    Echeverría, Ignacio

    2012-01-01

    Entre los biomateriales, las proteínas de soja tienen la capacidad de formar películas comestibles y/o biodegradables. Respecto de los polímeros sintéticos, estas películas proteicas presentan excelentes propiedades barrera a gases, lípidos y aromas; pero comúnmente no muestran propiedades mecánicas y barrera al vapor de agua satisfactorias para aplicaciones prácticas. Con el fin de mejorar la funcionalidad de estas películas, en este trabajo se estudió la obtención de materiales na...

  20. Gerenciamento de resultados e remuneração dos executivos nas companhias latino-americanas

    OpenAIRE

    Santana, Alex Fabiano Bertollo

    2015-01-01

    O objetivo deste estudo foi verificar se as formas de remuneração dos executivos das Companhias Latino-Americanas influenciam o gerenciamento de resultados contábeis. Realizou-se uma análise empírica de 48 empresas, de 4 diferentes países latino-americanos em um período de 5 anos (entre 2002 e 2006), perfazendo um total de 240 observações. Para verificar a ocorrência de gerenciamento de resultados nas companhias latino-americanas, foi adotado o modelo Kang e Sivaramakrishnan (1995). Os testes...

  1. Escapes da retórica da objetividade nas fotografias do jornal Zero Hora

    OpenAIRE

    Renata Lohmann; Ana Taís Martins Portanova Barros

    2016-01-01

    O presente artigo tem como objetivo estudar a questão da objetividade no fotojornalismo. Para tal, faz um estudo de como se dão os escapes da retórica da objetividade nas fotografias publicadas no jornal Zero Hora, de Porto Alegre, apresentando uma série de imagens veiculadas pelo periódico no ano de 2011. Apresenta conceitos de diversos autores como Roland Barthes, Arlindo Machado, Jacques Aumont e Philippe Dubois para averiguar o que seriam possíveis indicadores de conotação na fotografia. ...

  2. Escapes da retórica da objetividade nas fotografias do jornal Zero Hora

    Directory of Open Access Journals (Sweden)

    Renata Lohmann

    2016-08-01

    Full Text Available O presente artigo tem como objetivo estudar a questão da objetividade no fotojornalismo. Para tal, faz um estudo de como se dão os escapes da retórica da objetividade nas fotografias publicadas no jornal Zero Hora, de Porto Alegre, apresentando uma série de imagens publicadas pelo jornal no ano de 2011. Apresenta conceitos de diversos autores como Roland Barthes, Arlindo Machado, Jacques Aumont e Philippe Dubois para averiguar o que seriam possíveis indicadores de conotação na fotografia.

  3. Gastroenteropatía pierde proteínas: ¿causa olvidada de hipoalbuminemia?

    Directory of Open Access Journals (Sweden)

    E. Badia Aranda

    Full Text Available La gastroenteropatía pierde proteínas (PLE es un síndrome que consiste en una pérdida activa proteica por el aparato digestivo y relacionada con enfermedades. Tras revisión amplia de la literatura (MEDLINE - PubMed, hemos encontrado escasas referencias de esta gastroenteropatía como causante de hipoalbuminemia asociada a desnutrición. Ello nos ha motivado para revisar la entidad y su diagnóstico, detallando algunos casos clínicos recientes de nuestra experiencia.

  4. Estrategias de obtención de proteínas recombinantes en Escherichia coli

    OpenAIRE

    José García; Zeila Santana; Lourdes Zumalacárregui; Marisel Quintana; Diamilé González; Gustavo Furrazola; Oscar Cruz

    2013-01-01

    La expresión de proteínas recombinantes se ha favorecido con el uso de Escherichia coli debido a su relativo bajo costo, alta densidad de cultivo, su fácil manipulación genética y a las diversas herramientas biotecnológicas disponibles que son compatibles. En este artículo se presentan algunas estrategias para la expresión de Escherichia coli; se destacan factores genéticos y fisiológicos que incluyen: número de copias del vector de expresión, características del gen, estabilidad del ácido ri...

  5. VIDA URBANA E MODERNIDADE NAS OBRAS DE CARL SCHORSKE, RICHARD SENNET E MARSHALL BERMAN.

    OpenAIRE

    Augustus Sêga, Rafael

    2001-01-01

    O presente artigo pretende fazer uma breve exposição dos livros de Carl E. Schorske, "Viena fin-desiècle, política e cultura."; de Richard Sennet, "O declínio do homem público, as tiranias da intimidade."; e de Marshall Berman, "Tudo que é sólido desmancha no ar, a aventura da modernidade." Procuramos tecer uma rede capaz de captar as manifestações sobre vida urbana e modernidade nas obras de autores com formações acadêmicas distintas e como eles abordam tais questões. Para tanto, assuntos di...

  6. O nome próprio nas elaborações de Ferdinand de Saussure

    OpenAIRE

    Henriques, Stefania Montes

    2014-01-01

    O objetivo principal dessa dissertação é apreender de que maneira o nome próprio é considerado nas elaborações de Ferdinand de Saussure. Essa categoria linguística pode ser considerada como um dos problemas mais espinhosos nos estudos da linguagem. E isso por dois motivos principais: i. ela é heterogênea e não possui uma regra geral que seja aplicável a todas as línguas naturais; ii. envolve em sua constituição a arbitrariedade e a fala. Nesse sentido, efetuamos um percurso teórico pelos estu...

  7. ASEAN Mineral Database and Information System (AMDIS)

    Science.gov (United States)

    Okubo, Y.; Ohno, T.; Bandibas, J. C.; Wakita, K.; Oki, Y.; Takahashi, Y.

    2014-12-01

    AMDIS has lunched officially since the Fourth ASEAN Ministerial Meeting on Minerals on 28 November 2013. In cooperation with Geological Survey of Japan, the web-based GIS was developed using Free and Open Source Software (FOSS) and the Open Geospatial Consortium (OGC) standards. The system is composed of the local databases and the centralized GIS. The local databases created and updated using the centralized GIS are accessible from the portal site. The system introduces distinct advantages over traditional GIS. Those are a global reach, a large number of users, better cross-platform capability, charge free for users, charge free for provider, easy to use, and unified updates. Raising transparency of mineral information to mining companies and to the public, AMDIS shows that mineral resources are abundant throughout the ASEAN region; however, there are many datum vacancies. We understand that such problems occur because of insufficient governance of mineral resources. Mineral governance we refer to is a concept that enforces and maximizes the capacity and systems of government institutions that manages minerals sector. The elements of mineral governance include a) strengthening of information infrastructure facility, b) technological and legal capacities of state-owned mining companies to fully-engage with mining sponsors, c) government-led management of mining projects by supporting the project implementation units, d) government capacity in mineral management such as the control and monitoring of mining operations, and e) facilitation of regional and local development plans and its implementation with the private sector.

  8. Mineral resources and geo-engineering

    Directory of Open Access Journals (Sweden)

    Fathi Habashi

    2015-12-01

    Full Text Available Metals used in everyday life are produced from ores occurring in the Earth’s crust. Geological processes are known to concentrate minerals to form ores of economic value. Mineral processing engineers concentrate these ores by mechanical and physico-chemical methods while the extractive metallurgist extracts the metals by chemical means.

  9. Mineral Oil Aspiration Related Juvenile Idiopathic Arthritis

    OpenAIRE

    Nelson, Andrew D.; Fischer, Philip R.; Reed, Ann M.; Wylam, Mark E.

    2015-01-01

    We describe the development of rheumatoid factor-positive migratory polyarthritis in a 5-year-old male who had been administered bidaily oral mineral oil as a laxative since birth. Minor respiratory symptoms, radiographic and bronchoscopic findings were consistent with chronic lipoid pneumonia. We speculate that immune sensitization to mineral oil promoted the clinical syndrome of juvenile idiopathic arthritis.

  10. Acidosis inhibits mineralization in human osteoblasts.

    Science.gov (United States)

    Takeuchi, Shoko; Hirukawa, Koji; Togari, Akifumi

    2013-09-01

    Osteoblasts and osteoclasts maintain bone volume. Acidosis affects the function of these cells including mineral metabolism. We examined the effect of acidosis on the expression of transcription factors and mineralization in human osteoblasts in vitro. Human osteoblasts (SaM-1 cells) derived from the ulnar periosteum were cultured with α-MEM containing 50 μg/ml ascorbic acid and 5 mM β-glycerophosphate (calcifying medium). Acidosis was induced by incubating the SaM-1 cells in 10 % CO₂ (pH approximately 7.0). Mineralization, which was augmented by the calcifying medium, was completely inhibited by acidosis. Acidosis depressed c-Jun mRNA and increased osteoprotegerin (OPG) production in a time-dependent manner. Depressing c-Jun mRNA expression using siRNA increased OPG production and inhibited mineralization. In addition, depressing OPG mRNA expression with siRNA enhanced mineralization in a dose-dependent manner. Acidosis or the OPG protein strongly inhibited mineralization in osteoblasts from neonatal mice. The present study was the first to demonstrate that acidosis inhibited mineralization, depressed c-Jun mRNA expression, and induced OPG production in human osteoblasts. These results suggest that OPG is involved in mineralization via c-Jun in human osteoblasts.

  11. Utilization of mining and mineral wastes

    Energy Technology Data Exchange (ETDEWEB)

    Park, Kyung Ho; Hong, Seung Woong; Choi, Young Yoon; Kim, Byung Gyu; Park, Je Shin [Korea Institute of Geology Mining and Materials, Taejon (Korea)

    1998-12-01

    Up to now, it is estimated that more than 50 million tons of mineral wastes have been generated mining industries and deposited on the land in Korea. Much of cultivated land and hilly areas have been occupied by this wastes, which cause pollution of the environment. Utilization of the mineral wastes is preferable to stabilization because full use would both eliminate the waste and broaden the mineral resource base. Therefore, the development of utilization techniques of mineral wastes is very important not only for improving the environment but also for resource conservation. In countries with high population and poor natural resources like Korea, the utilization of these wastes is essential to decrease the environmental problem and the secure the resources and the study on this field play a important part. Therefore, the objective of this study is to develop the utilization techniques of the mineral wastes. In first year's research, the contents and scope of this study are 1) Present condition and Field Survey on the mineral wastes with respect of their utilization, 2) Reviews of Current effects and research to utilize mineral wastes, 3) Characterization of mineral wastes and environmental test, 4) Evaluation and study on the utilization. (author). 67 refs., 25 tabs., 54 figs.

  12. Dehydration-induced luminescence in clay minerals

    Science.gov (United States)

    Coyne, L. M.; Lahav, N.; Lawless, J. G.

    1981-01-01

    Reports of triboluminescent phenomena in organic crystalline materials prompted a search for related processes in clay minerals. The reported extensive mechanical distortion produced on freezing and drying of montmorillonite was particularly interesting because of studies of condensation reactions in a wet/dry cycled reaction sequence. The discovery of an unusual luminescent process in several clay minerals is reported and its characteristics are described.

  13. Mineral Resource Team 2010 Activities Summary

    Science.gov (United States)

    2011-01-29

    of the Himalayas where the Indian subcontinent collided with Eurasia, the country’s unique geological foundation created thousands of mineral...on or below the paleo -ocean floor. Some VMS deposits are distinctive in that Cu ores formed by hydrothermal circulation and exhalation of minerals

  14. Minerals in fish: does the source matter?

    NARCIS (Netherlands)

    Antony Jesu Prabhu, P.

    2015-01-01

    Antony Jesu Prabhu, P. (2015). Minerals in fish: does the source matter? PhD thesis. Wageningen University, The Netherlands. Minerals are a group of micro-nutrients essential to fish. Meta-analysis of literature data was performed to identify the appropriate response criterion to de

  15. CAS researchers find a new mineral

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    @@ Mineralogists from the CAS Guangzhou Institute of Geochemistry (GIG) recently discovered Xieite, a chromium-iron oxide in its natural state. It has been authorized as a new mineral by Commission on New Minerals Nomenclature and Classification under the International Mineralogical Association (CNMNC-IMA).

  16. Technology sandwich panels with mineral wool insulation

    OpenAIRE

    Tyulenev M.; Burtzeva M.; Mednikova E.

    2016-01-01

    Sandwich panel — self–supporting structure consisting of metal cladding and thermal insulation core. As a heat–insulating core used mineral wool, foamed plastics. Production of sandwich panels with insulation mineral wool performed on modular lines for the production of aggregate or conveyer scheme. Sandwich panels are used as load–bearing elements of the facades, as well as a roof covering.

  17. Mineral Engineering Education in the West.

    Science.gov (United States)

    Borgmann, Carl W.; Bartram, John W.

    A large percentage of all US degrees in mineral engineering fields are awarded by 14 institutions of higher education in 13 western states: Alaska, Arizona, California, Colorado, Hawaii, Idaho, Montana, Nevada, New Mexico, Oregon, Utah, Washington, and Wyoming. But low undergraduate enrollments in the mineral engineering curricula have increased…

  18. Utilization of mining and mineral wastes

    Energy Technology Data Exchange (ETDEWEB)

    Park, Kyung Ho; Hong, Seung Woong; Choi, Young Yoon; Kim, Byung Gyu; Park, Je Shin [Korea Institute of Geology Mining and Materials, Taejon (Korea)

    1998-12-01

    Up to now, it is estimated that more than 50 million tons of mineral wastes have been generated mining industries and deposited on the land in Korea. Much of cultivated land and hilly areas have been occupied by this wastes, which cause pollution of the environment. Utilization of the mineral wastes is preferable to stabilization because full use would both eliminate the waste and broaden the mineral resource base. Therefore, the development of utilization techniques of mineral wastes is very important not only for improving the environment but also for resource conservation. In countries with high population and poor natural resources like Korea, the utilization of these wastes is essential to decrease the environmental problem and the secure the resources and the study on this field play a important part. Therefore, the objective of this study is to develop the utilization techniques of the mineral wastes. In first year's research, the contents and scope of this study are 1) Present condition and Field Survey on the mineral wastes with respect of their utilization, 2) Reviews of Current effects and research to utilize mineral wastes, 3) Characterization of mineral wastes and environmental test, 4) Evaluation and study on the utilization. (author). 67 refs., 25 tabs., 54 figs.

  19. Mineral nutrition of cocoa : a review

    NARCIS (Netherlands)

    Vliet, van J.A.; Slingerland, M.A.; Giller, K.E.

    2015-01-01

    This literature review on mineral nutrition of cocoa was commissioned by the Scientific Committee of the Cocoa Fertiliser Initiative to address the following questions: What knowledge is currently available about mineral nutrition of cocoa? What are the current knowledge gaps? What are the key areas

  20. Earth mineral resource of the month: asbestos

    Science.gov (United States)

    Virta, Robert L.

    2010-01-01

    The article discusses the characteristics and feature of asbestos. According to the author, asbestos is a generic name for six needle-shaped minerals that possess high tensile strengths, flexibility, and resistance to chemical and thermal degradation. These minerals are actinolite, amosite, anthophyllite, chrysolite, crocilodite and tremolite. Asbestos is used for strengthening concrete pipe, plastic components, and gypsum plasters.

  1. Control of Vertebrate Skeletal Mineralization by Polyphosphates

    Science.gov (United States)

    Omelon, Sidney; Georgiou, John; Henneman, Zachary J.; Wise, Lisa M.; Sukhu, Balram; Hunt, Tanya; Wynnyckyj, Chrystia; Holmyard, Douglas; Bielecki, Ryszard; Grynpas, Marc D.

    2009-01-01

    Background Skeletons are formed in a wide variety of shapes, sizes, and compositions of organic and mineral components. Many invertebrate skeletons are constructed from carbonate or silicate minerals, whereas vertebrate skeletons are instead composed of a calcium phosphate mineral known as apatite. No one yet knows why the dynamic vertebrate skeleton, which is continually rebuilt, repaired, and resorbed during growth and normal remodeling, is composed of apatite. Nor is the control of bone and calcifying cartilage mineralization well understood, though it is thought to be associated with phosphate-cleaving proteins. Researchers have assumed that skeletal mineralization is also associated with non-crystalline, calcium- and phosphate-containing electron-dense granules that have been detected in vertebrate skeletal tissue prepared under non-aqueous conditions. Again, however, the role of these granules remains poorly understood. Here, we review bone and growth plate mineralization before showing that polymers of phosphate ions (polyphosphates: (PO3−)n) are co-located with mineralizing cartilage and resorbing bone. We propose that the electron-dense granules contain polyphosphates, and explain how these polyphosphates may play an important role in apatite biomineralization. Principal Findings/Methodology The enzymatic formation (condensation) and destruction (hydrolytic degradation) of polyphosphates offers a simple mechanism for enzymatic control of phosphate accumulation and the relative saturation of apatite. Under circumstances in which apatite mineral formation is undesirable, such as within cartilage tissue or during bone resorption, the production of polyphosphates reduces the free orthophosphate (PO43−) concentration while permitting the accumulation of a high total PO43− concentration. Sequestering calcium into amorphous calcium polyphosphate complexes can reduce the concentration of free calcium. The resulting reduction of both free PO43− and free

  2. Thermoelastic properties of minerals at high temperature

    Indian Academy of Sciences (India)

    Sanjay Upadhyay; Hem Chandra; Meenakashi Joshi; Deepika P Joshi

    2011-01-01

    The knowledge of elasticity of the minerals is useful for interpreting the structure and composition of the lower mantle and also in seismic studies. The purpose of the present study is to discuss a simple and straightforward method for evaluating thermoelastic properties of minerals at high temperatures. We have extended the Kumar’s formulation by taking into the account the concept of anharmonicity in minerals above the Debye temperature (D). In our present study, we have investigated the thermophysical properties of two minerals (pyrope-rich garnet and MgAl2O4) under high temperatures and calculated the second-order elastic constant () and bulk modulus (T) of the above minerals, in two cases first by taking Anderson–Gruneisen parameter (T) as temperature-independent and then by treating T as temperature-dependent parameter. The results obtained when T is temperature-dependent are in close agreement with experimental data.

  3. Raising environmental awareness among miners in Iran

    Directory of Open Access Journals (Sweden)

    Ezatollah Mozaffari

    2013-06-01

    Full Text Available Generation of waste is inevitable but controllable in minerals industry. The aim of this research is to find ways forraising environmental awareness among miners. Miners’ attitude towards environmental mining has been investigated. A survey has been done collecting mine managers’ point of view coupled with current trend on mine waste management in Iran. Their opinions on methods used for minerals extraction and waste productionare sought in order to investigate possible educational schemes for waste reduction and mine waste disposal. The type and quantity of waste produced by respondents have been identified to prioritise the wastes produced in minesites. Environmental legislations and policies for good practice minerals extraction are surveyed anddemonstrated. These are regarded as our clients’ preferences on managing mining waste. When combined with other existing policies and methods, they could become part of a learning program to boost awareness among miners.

  4. Biohydrometallurgy for nonsulfidic minerals - A review

    Energy Technology Data Exchange (ETDEWEB)

    Jain, N.; Sharma, D.K. [Indian Institute of Technology of Delhi, New Delhi (India). Center for Energy Studies

    2004-05-01

    Bioleaching is a technology applicable to metal extraction from low-grade ores, ore beneficiation, coal beneficiation, metal detoxification, and recovery of metals from waste materials. The technology is environmentally sound and it may lower operational cost and energy requirement. Whereas leaching of sulfidic minerals using chemolithoautotrophic bacteria is the most studied and commercially exploitable aspect of mineral biotechnology today, there is a dearth of literature on the dissolution of nonsulfidic minerals. Biohydrometallurgy of nonsulfidic minerals involves the action of heterotrophic microorganisms. Heterotrophic bacteria and fungi have the potential for producing acidic metabolites that are able to solubilize oxide, silicate, carbonate and hydroxide minerals by reduction, acidolysis and complexation mechanisms. It is an important aspect of biohydrometallugy that requires development to meet future needs.

  5. An overview of hydrodynamic studies of mineralization

    Directory of Open Access Journals (Sweden)

    Guoxiang Chi

    2011-07-01

    Full Text Available Fluid flow is an integral part of hydrothermal mineralization, and its analysis and characterization constitute an important part of a mineralization model. The hydrodynamic study of mineralization deals with analyzing the driving forces, fluid pressure regimes, fluid flow rate and direction, and their relationships with localization of mineralization. This paper reviews the principles and methods of hydrodynamic studies of mineralization, and discusses their significance and limitations for ore deposit studies and mineral exploration. The driving forces of fluid flow may be related to fluid overpressure, topographic relief, tectonic deformation, and fluid density change due to heating or salinity variation, depending on specific geologic environments and mineralization processes. The study methods may be classified into three types, megascopic (field observations, microscopic analyses, and numerical modeling. Megascopic features indicative of significantly overpressured (especially lithostatic or supralithostatic fluid systems include horizontal veins, sand injection dikes, and hydraulic breccias. Microscopic studies, especially microthermometry of fluid inclusions and combined stress analysis and microthermometry of fluid inclusion planes (FIPs can provide important information about fluid temperature, pressure, and fluid-structural relationships, thus constraining fluid flow models. Numerical modeling can be carried out to solve partial differential equations governing fluid flow, heat transfer, rock deformation and chemical reactions, in order to simulate the distribution of fluid pressure, temperature, fluid flow rate and direction, and mineral precipitation or dissolution in 2D or 3D space and through time. The results of hydrodynamic studies of mineralization can enhance our understanding of the formation processes of hydrothermal deposits, and can be used directly or indirectly in mineral exploration.

  6. Feldspar minerals as efficient deposition ice nuclei

    Directory of Open Access Journals (Sweden)

    J. D. Yakobi-Hancock

    2013-06-01

    Full Text Available Mineral dusts are well known to be efficient ice nuclei, where the source of this efficiency has typically been attributed to the presence of clay minerals such as illite and kaolinite. However, the ice nucleating abilities of the more minor mineralogical components have not been as extensively examined. As a result, the deposition ice nucleation abilities of 24 atmospherically-relevant mineral samples have been studied, using a continuous flow diffusion chamber at −40.0 ± 0.3 °C. The same particle size (200 nm and particle preparation procedure were used throughout. The ice nucleation behaviour of the pure minerals is compared to that of complex mixtures, such as Arizona Test Dust (ATD and Mojave Desert Dust (MDD, and to lead iodide, which has been previously proposed for cloud seeding. Lead iodide was the most efficient ice nucleus (IN, requiring a critical relative humidity with respect to ice (RHi of 122.0 ± 2.0% to activate 0.1% of the particles. MDD (RHi 126.3 ± 3.4% and ATD (RHi 129.5 ± 5.1% have lower but comparable activity. From a set of clay minerals (kaolinite, illite, montmorillonite, non-clay minerals (e.g. hematite, magnetite, calcite, cerussite, quartz, and feldspar minerals (orthoclase, plagioclase present in the atmospheric dusts it was found that the feldspar minerals (particularly orthoclase, and not the clays, were the most efficient ice nuclei. Orthoclase and plagioclase were found to have critical RHi values of 127.1 ± 6.3% and 136.2 ± 1.3%, respectively. The presence of feldspars (specifically orthoclase may play a significant role in the IN behaviour of mineral dusts despite their lower percentage in composition relative to clay minerals.

  7. Microcefalia e outras manifestações relacionadas ao vírus Zika: impacto nas crianças, nas famílias e nas equipes de saúde

    Directory of Open Access Journals (Sweden)

    Decio Brunoni

    Full Text Available Resumo O presente estudo objetivou apresentar um panorama nacional e internacional atual dos estudos sobre o vírus Zika (ZIKV e, ancorado no avanço deste conhecimento, refletir sobre planos de ação voltados para as crianças, famílias e equipes de saúde envolvidas. Neste sentido, o estudo propôs a implementação de sistemas de seguimento para conhecer, descrever e caracterizar aspectos que devem estar relacionados à exposição pré-natal ao ZIKV, divididos em três eixos de atuação: 1. Avaliação diagnóstica e etiológica e rastreamento de problemas de desenvolvimento nas crianças incluídas como casos confirmados ou suspeitos. 2. Investigação do impacto emocional, da qualidade de vida, das estratégias de enfrentamento e da rede de apoio às famílias das crianças incluídas. 3. Capacitação de equipes multiprofissionais para avaliar e elaborar programas de intervenção ao longo do desenvolvimento das crianças, principalmente nos três primeiros anos de vida. Como conclusão, o presente trabalho ressalta que o sistema de assistência à saúde encontra-se diante de grandes desafios: entender o real significado de um potencial novo teratógeno; desvendar os mecanismos patogênicos do ZIKV, principalmente para o enfrentamento preventivo, e reconhecer o amplo espectro de manifestações clínicas para a elaboração de programas de intervenção.

  8. UAS Integration in the NAS Project: Integrated Test and Evaluation (IT&E) Flight Test 3. Revision E

    Science.gov (United States)

    Marston, Michael

    2015-01-01

    The desire and ability to fly Unmanned Aircraft Systems (UAS) in the National Airspace System (NAS) is of increasing urgency. The application of unmanned aircraft to perform national security, defense, scientific, and emergency management are driving the critical need for less restrictive access by UAS to the NAS. UAS represent a new capability that will provide a variety of services in the government (public) and commercial (civil) aviation sectors. The growth of this potential industry has not yet been realized due to the lack of a common understanding of what is required to safely operate UAS in the NAS. NASA's UAS Integration into the NAS Project is conducting research in the areas of Separation Assurance/Sense and Avoid Interoperability, Human Systems Integration (HSI), and Communication to support reducing the barriers of UAS access to the NAS. This research is broken into two research themes namely, UAS Integration and Test Infrastructure. UAS Integration focuses on airspace integration procedures and performance standards to enable UAS integration in the air transportation system, covering Sense and Avoid (SAA) performance standards, command and control performance standards, and human systems integration. The focus of Test Infrastructure is to enable development and validation of airspace integration procedures and performance standards, including the integrated test and evaluation. In support of the integrated test and evaluation efforts, the Project will develop an adaptable, scalable, and schedulable relevant test environment capable of evaluating concepts and technologies for unmanned aircraft systems to safely operate in the NAS. To accomplish this task, the Project will conduct a series of Human-in-the-Loop and Flight Test activities that integrate key concepts, technologies and/or procedures in a relevant air traffic environment. Each of the integrated events will build on the technical achievements, fidelity and complexity of the previous tests and

  9. Caracterización de patrones de hordeínas en variedades mexicanas de cebada maltera

    Directory of Open Access Journals (Sweden)

    Marisol Salgado-Albarra\\u0301n

    2015-01-01

    Full Text Available Un grupo de proteínas de almacenamiento muy abundantes en la semilla de cereales son las prolaminas que se caracterizan por contener muchos residuos de prolina en su secuencia. En cebada, las prolaminas son denominadas hordeínas. El propósito de este estudio fue obtener los patrones proteicos de bandeo mediante la técnica de electroforesis en gel de poliacrilamida bajo condiciones desnaturalizantes para, hordeínas de semilla seca de cinco variedades mexicanas de cebada. Asimismo, se obtuvieron los patrones de hordeínas en malta procesada a partir de cuatro variedades mexicanas y una variedad canadiense (Metcalfe. A continuación, algunas de las bandas diferenciales fueron identificadas mediante espectrometría de masas (EM utilizando distintos protocolos de digestión. En los patrones de semilla seca se encontraron diferencias entre las variedades mexicanas para las bandas correspondientes a un peso molecular de 100 kDa, 65 kDa y algunas de 37-45 kDa. En el caso de la malta, los patrones de las variedades mexicanas fueron muy contrastantes entre sí, así como con el observado en Metcalfe, lo que sugiere que el procesamiento de hordeínas durante la germinación y el secado de la malta depende de cada variedad. Finalmente, en la identificación por EM se demostró que el uso de digestión con tripsina es adecuado para distinguir hordeínas B y γ en malta, mientras que el uso de digestión secuencial con quimotripsina y tripsina favorece la identificación de hordeínas C en semilla seca.

  10. PMCR-Miner: parallel maximal confident association rules miner algorithm for microarray data set.

    Science.gov (United States)

    Zakaria, Wael; Kotb, Yasser; Ghaleb, Fayed F M

    2015-01-01

    The MCR-Miner algorithm is aimed to mine all maximal high confident association rules form the microarray up/down-expressed genes data set. This paper introduces two new algorithms: IMCR-Miner and PMCR-Miner. The IMCR-Miner algorithm is an extension of the MCR-Miner algorithm with some improvements. These improvements implement a novel way to store the samples of each gene into a list of unsigned integers in order to benefit using the bitwise operations. In addition, the IMCR-Miner algorithm overcomes the drawbacks faced by the MCR-Miner algorithm by setting some restrictions to ignore repeated comparisons. The PMCR-Miner algorithm is a parallel version of the new proposed IMCR-Miner algorithm. The PMCR-Miner algorithm is based on shared-memory systems and task parallelism, where no time is needed in the process of sharing and combining data between processors. The experimental results on real microarray data sets show that the PMCR-Miner algorithm is more efficient and scalable than the counterparts.

  11. ROCKS & MINERALS DETERMINATION AND ANALYSIS

    Institute of Scientific and Technical Information of China (English)

    2010-01-01

    <正>20102326 Cai Shuwei(Nanjing Institute of Geology and Mineral Resources,Nanjing 210016,China);Zhang Fei Determination of Trace Tin in Geochemical Materials by Platform GFAAS(Resources Survey & Environment,ISSN1671-4814,CN32-1640/N,30(4),2009,p.297-300,3 tables,6 refs.)Key words:atomic absorption spectra,tinA platform graphite furnace atomic absorption spectrometry(GFAAS)method was established for the determination of trace tin in geochemical samples.By using of magnesium nitrate,palladium nitrate and ammonium nitrate selected as the matrix modifier,the optimum conditions of analysis were studied.The analysis results of the national geochemical standard samples determined by the method are coincided well with the standard values of the samples.20102327 Chen Sulan(Jiangsu Environmental Monitoring Center,Nanjing 210036,China)Progress on Determination Method of Molybdenum in Environmental Samples(Journal of Geology,ISSN1674-3636,CN32-1796/P,33(4),2009,p.411-416,38 refs.)Key words:chemical analysis,molybdenumAccording to a long research on determination method of molybdenum in China,the author summarized the main determination methods of molybdenum for environmental samples.The methods in common use included photometry,catalytic polarography,flame atomic absorption spectrometry,graphite furnace atomic absorption spectrometry,inductively coupled

  12. Bone Mineralization in Celiac Disease

    Directory of Open Access Journals (Sweden)

    Tiziana Larussa

    2012-01-01

    Full Text Available Evidence indicates a well-established relationship between low bone mineral density (BMD and celiac disease (CD, but data on the pathogenesis of bone derangement in this setting are still inconclusive. In patients with symptomatic CD, low BMD appears to be directly related to the intestinal malabsorption. Adherence to a strict gluten-free diet (GFD will reverse the histological changes in the intestine and also the biochemical evidence of calcium malabsorption, resulting in rapid increase of BMD. Nevertheless, GFD improves BMD but does not normalize it in all patients, even after the recovery of intestinal mucosa. Other mechanisms of bone injury than calcium and vitamin D malabsorption are thought to be involved, such as proinflammatory cytokines, parathyroid function abnormalities, and misbalanced bone remodeling factors, most of all represented by the receptor activator of nuclear factor B/receptor activator of nuclear factor B-ligand/osteoprotegerin system. By means of dual-energy X-ray absorptiometry (DXA, it is now rapid and easy to obtain semiquantitative values of BMD. However, the question is still open about who and when submit to DXA evaluation in CD, in order to estimate risk of fractures. Furthermore, additional information on the role of nutritional supplements and alternative therapies is needed.

  13. Comportamento proativo nas organizações: o efeito dos valores pessoais

    Directory of Open Access Journals (Sweden)

    Meiry Kamia

    Full Text Available O comportamento proativo é definido como um conjunto de comportamentos extrapapel em que o trabalhador busca espontaneamente mudanças no seu ambiente de trabalho, soluciona e antecipa-se aos problemas, visando a metas de longo prazo que beneficiam a organização. Este estudo teve por objetivo investigar a relação entre os valores pessoais e o comportamento proativo nas organizações. Foram utilizados como instrumentos de medida o Personal Values Questionnaire e a Escala de Comportamento Proativo nas Organizações, ambos já validados para o Brasil. Após a eliminação dos casos extremos, a amostra ficou constituída por 325 funcionários de diferentes organizações. A análise de regressão linear revelou que os valores predizem significativamente os comportamentos proativos, apontando uma relação positiva do tipo motivacional estimulação (B= 0,205, p<0,01 e universalismo/benevolência (B=0,302, p<0,01 com proatividade, e negativa com o tipo motivacional tradição (B= -0,189, p<0,01, de acordo com o previsto pelo referencial teórico. As implicações para os estudos na área são discutidas.

  14. Uma outra ideia da Índia. As literaturas nas línguas Bhashas

    Directory of Open Access Journals (Sweden)

    Cielo Griselda Festino

    2013-04-01

    Full Text Available http://dx.doi.org/10.5007/2175-7968.2013v1n31p103 O objetivo deste artigo é discutir as narrativas indianas nas línguas bhashas, as línguas vernáculas do subcontinente indiano a través de uma política e poética da tradução que da voz e visibilidade a culturas que, de outro modo, estariam restringidas às diversas culturas onde são produzidas. Dessa maneira, não só as literaturas do “front yard”, ou seja as narrativas indianas escritas na língua inglesa da diáspora ganham visibilidade, mas também as narrativas escritas do “backyard” nas línguas vernáculas  da Índia. Nesse processo, o termo “vernáculo” ganha um novo significado no sentido que o que é realmente “vernacularizado” é a língua  inglesa porque se torna um veículo por meio do que as literaturas bhasha tornam-se conhecidas. Para ilustrar esse processo o artigo traz uma análise do conto “Thayyaal” escrito na língua Tamil, do sul da Índia.

  15. Nursing workload measurement scales in Intensive Care Units. Correlation between NAS and NEMS

    Directory of Open Access Journals (Sweden)

    Montserrat Martínez Lareo

    2011-11-01

    Full Text Available The high costs of intensive care and the importance of patient safety and quality of care highlight the need to develop instrument to measure, as precisely as possible, nursing workload and staffing levels in intensive care. To assess the ideal staff number, we need instruments to measure the real nursing workload. The aim of this research is to compare two nursing workload measurement scales in Intensive Care Units, the Nursing Activities Score (NAS and Nine Equivalents of Nurse Manpower Use Score (NEMS. We also want to assess the staffing needs of our ICU. A descriptive correlational study will be performed in a mixed medical ICU. The sample will be composed of of a minimum of 70 patients. Data regarding individual patients and unit global workload will be recorded, measured both with the NEMS and NAS scales. The required nursing staff will be calculated according to the measured workload. Nursing staffing needs using both scales will be calculated and compared to the actual staff. A descriptive analysis of the variables will be performed, and the existing correlation between both scales will be assessed using the Pearson correlation coefficient. A Student-t test will be performed to determine the differences between the calculated staffing requirements and the actual nursing staff. All data analyses will be done using a statistical software.

  16. Aeronautics Research Mission Directorate Integrated Systems Research Program (ISRP) and UAS Integration in the NAS Project

    Science.gov (United States)

    Wolfe, Jean

    2010-01-01

    Program Goal: Conduct research at an integrated system-level on promising concepts and technologies and explore, assess, or demonstrate the benefits in a relevant environment.Criteria for selection of projects for Integrated Systems Research: a) Technology has attained enough maturity in the foundational research program that they merit more in-depth evaluation at an integrated system level in a relevant environment. b) Technologies which systems analysis indicates have the most potential for contributing to the simultaneous attainment of goals. c) Technologies identified through stakeholder input as having potential for simultaneous attainment of goals. d) Research not being done by other government agencies and appropriate for NASA to conduct. e) Budget augmentation. Environmentally Responsible Aviation (ERA) Project Explore and assess new vehicle concepts and enabling technologies through system-level experimentation to simultaneously reduce fuel burn, noise, and emissions Unmanned Aircraft Systems (UAS) Integration in the National Airspace System (NAS) Project Contribute capabilities that reduce technical barriers related to the safety and operational challenges associated with enabling routine UAS access to the NAS Innovative Concepts for Green Aviation (ICGA) Project Spur innovation by offering research opportunities to the broader aeronautics community through peer-reviewed proposals, with a focus on making aviation more eco-friendly. Establish incentive prizes similar to the Centennial Challenges and sponsor innovation demonstrations of selected technologies that show promise of reducing aviation s impact on the environment

  17. Gestão Ambiental nas Organizações Humanas

    Directory of Open Access Journals (Sweden)

    Jefferson de Queiroz Crispim

    2003-05-01

    Full Text Available Este artigo pretende abordar os conceitos e aplicabilidade da Gestão Ambiental nas Organizações Humanas. Parte de algumas premissas teóricas de interdisciplinaridade que fundamentam as ciências da administração, da economia e da pedagogia humana nas empresas, que possibilitam a ação eficaz na rede sistêmica da vida organizacional. Sabe-se, que a construção do conhecimento organizacional fundamenta-se na própria reconstrução do conhecimento, onde a interdisciplinaridade das Ciências Naturais e Socais é condição “sine qua mon”, para que este entendimento se fortaleça, quando dirigida para a aplicabilidade coletiva das vidas das empresas. Serão analisados os aspectos relacionados com origem do movimento capitalista, as estratégias de organização e a relação com a natureza, bem como a organização social e reconstrução das relações sócias entre empresas, sociedade e mercado.

  18. Artefatos de memória e representações nas mídias

    Directory of Open Access Journals (Sweden)

    Luís Carlos Lopes

    2011-02-01

    Full Text Available O trabalho intitulado Artefatos de Memória e Representações nas Mídias versa sobre  a presença social e midiática de representações, entendidas como artefatos/significações, relativas ao passado/presente histórico. Afirma que estes podem ser compreendidos como construções ideológico-representacionais. Discute as teorias da memória e representação, buscando alternativas criticas ao que está posto e suas possíveis interfaces com os estudos comunicacionais.  Procura compreender a relação entre a emissão e a recepção das mensagens jornalísticas e televisivas, sob o ponto de vista de suas significações. Dá especial ênfase ao caso brasileiro, tratando de temas que são recorrentes nas emissões midiáticas do país. Por isto, também se refere à compreensão dos padrões comunicacionais estabelecidos pelas grandes redes informacionais, buscando entender seus mimetismos e recorrências.

  19. OLICIES AND PRACTICES FOR IMPLEMENTATION OF IFRS AND NAS IN THE REPUBLIC OF MOLDOVA

    Directory of Open Access Journals (Sweden)

    Lica\tERHAN

    2015-06-01

    Full Text Available This study aims to analyse the process of harmonization of national accounting standards of the Republic of Moldova to the international standards. It highlights the main advantages, disadvantages, risks and opportunities regarding the implementation of the new standards. A major step for the Republic of Moldova was the implementation of IFRS, which has become mandatory for all public interest entities from 1 January 2012 and the adoption of new NAS in accordance with EU Directives and IFRS for small and medium-sized entities, for which the transition to IFRS was difficult due to high costs involved. The new NAS came into force on 1 January 2014 as a recommendation, but starting with 1st January 2015 it will be mandatory for all entities. The paper includes a practical analysis of the impact of transition to IFRS on the financial results of a public interest entity- Moldova Agroindbank, which is the largest commercial bank, with the highest market share in the banking sector of the Republic of Moldova. A result of the analysis of primary and secondary indicators calculated on the base of the financial statements prepared by commercial bank at 31.12.11, we found that the transition to IFRS has resulted in the growth of all financial indicators.

  20. Os sentidos de compreensão nas teorias de Weber e Habermas

    Directory of Open Access Journals (Sweden)

    José Geraldo A. B. Poker

    2013-01-01

    Full Text Available Partindo do pressuposto de que a teoria social elaborada por Habermas em muito se assemelha àquela construída por M. Weber, procedeu-se a um estudo comparativo com a intenção de identificar as formas pelas quais Weber e Habermas elaboraram o conceito de compreensão, ao mesmo tempo em que e o elegeram, cada um a seu modo, como instrumento metodológico adequado às dificuldades da produção de conhecimento científico nas Ciências Sociais. Tanto para Weber, como para Habermas, o conhecimento nas Ciências Sociais não consegue escapar das influências diretas da subjetividade do cientista, como também não é capaz de se proteger das contingências histórico-culturais aos quais inevitavelmente toda ação humana está vinculada. Por isso, fundamentados em suas próprias razões, tanto Weber quanto Habermas apontam a compreensão como a forma possível de conhecimento, o que implica a renúncia às pretensões explicativas e à produção de teorias gerais de fundamentação última, que são típicas das ciências convencionais.

  1. O corpo nas imagens midiáticas The body in media messages involving sports

    Directory of Open Access Journals (Sweden)

    Lourdes Gabrielli

    2008-11-01

    Full Text Available Nesse artigo, pretendemos estabelecer uma relação entre esporte e transformações sociais. Considerando a mídia uma das principais instituições de divulgação das aspirações sociais, desenvolvemos uma análise das imagens de corpo presentes nas mensagens midiáticas que tematizam o esporte. Nas representações do corpo do atleta identificamos aspectos do imaginário de corpo na atualidade que aludem à idéia de superação dos limites físicos e também a de diversidade étnica e cultural. The body in media messages involving sports — In this article, we intend to establish possible approximations between the neo-Baroque and the present time based on Calabrese's studies. Broaching two of the characteristics pointed out by the aforementioned author — excess and complexity — we analyze the body images that are present in mediatic messages involving sports. We consider that the idea of the athlete's body surpassing its physical limits and the notion of ethnic and cultural diversity that constitute such images allude to the imaginary of the post-organic body. The athlete's body thus personifies the aspirations of society.

  2. Péptidos bioactivos en proteínas de reserva

    Directory of Open Access Journals (Sweden)

    Millán, F.

    2000-10-01

    Full Text Available A review on the bioactive peptides described so far in storage proteins, mainly milk proteins, has been carried out. Bioactive peptides are small amino acid sequences inactives in the native protein, but that can be liberated after hydrolysis of these proteins and exert different functions. Among the main one are bioactive peptides with opioid activity, antagonistic opioid, immunomodulatory, antithrombotic, ion transporting or antihypertensive. The possible presence of these peptides in other protein source, mainly oilseed plants and their possible use is discussed.Se ha realizado una revisión de los péptidos bioactivos descr itos hasta e l momento en proteínas de reserva, principalmente de la leche. Los péptidos bioactivos son pequeñas secuencias aminoacidícas inactivas dentro de la proteína, pero que pueden ser liberados tras la hidrólisis de estas proteínas y ejercer diversas funciones. Entre los más abundantes destacan los péptidos con actividad opioide, opioide antagonista, antitrombótica, inmunomoduladora, transportadora de iones o hipotensora. Se discute la posible presencia de estos péptidos en otras fuentes proteicas, principalmente plantas oleaginosas y su posible aprovechamiento.

  3. JK E A REINVENÇÃO DO COTIDIANO NAS NARRATIVAS JORNALÍSTICAS BRASILEIRAS

    Directory of Open Access Journals (Sweden)

    Renato de Almeida Vieira e Silva

    2014-03-01

    Full Text Available Qual a importância dos discursos para a construção da imagem presidencial nas narrativas jornalísticas, num determinado contexto histórico, sendo essa construção de sentidos capaz inclusive de ressignificar o cotidiano de um país , ativar o imaginário e transcender àquele período de governo tornando-se mitológica até para os presidentes que vieram em sucessão? Esse trabalho se propõe a analisar essas hipóteses de produção simbólica e de sentidos encontradas nos discursos do presidente JK, publicados em algumas das principais revistas brasileiras entre 1956 e 1960, representadas por O Cruzeiro e Manchete, contemporizando com algumas citações veiculadas nas revistas Época, Veja e Isto É, em fases mais recentes. Para esse intento serão utilizados conceitos de autores como Bourdieu, Barthes, Orlandi, Heller, Motta, Eliade e Girardet.

  4. Minerals, Tobacco and Smoking-Related Disease

    Science.gov (United States)

    Stephens, W. E.

    2003-12-01

    As much as 8% (by dry weight) of commercial tobacco is mineral, and the view that minerals are inert, playing no more than a passive role in smoking-related disease, is challenged. An inventory of minerals in tobacco is presented and an interpretation of their sources given. Using elemental abundances the relative contributions of natural and anthropogenic sources to the commercial product is quantitatively modelled relative to average crustal abundances. A framework is presented for investigating the potential ways in which minerals with, or acquire, toxic properties behave in the smoking environment. In order to represent a potential hazard any mineral (or mineral reaction product) with suspected toxic properties must partition into smoke and be respirable. For inhalation a significant proportion of the particles must be smaller than 10 microns. Three categories of potential hazard are recognised: 1. Minerals with intrinsic toxic properties. Quartz can amount to 1% or more in some cigarettes and is defined as a human carcinogen by the IARC. It is not likely to represent a hazard as its grain size is probably too coarse to be respirable. However talc, also a Type 1 carcinogen when it is contaminated with asbestos, is a common constituent of cigarette paper and may be of respirable size. Some other minerals also fall into this category. 2. Minerals that generate toxic products on combustion. Examples are the biominerals calcium oxalate monohydrate (whewellite) and dihydrate (weddellite), which amount to about 5 wt% of popular UK brands. These minerals decompose at tobacco combustion temperatures yielding large quantities of carbon monoxide. A substantial fraction of the CO budget of UK cigarettes may derive from this source. 3. Minerals that acquire toxic properties on combustion. Little is known about free radical generation on mineral surfaces during tobacco combustion, but the devolatilisation of calcic phases (carbonates and oxalates) creates oxide particles

  5. DESEMPENHO AGRONÔMICO DO MILHO EM RAZÃO DO TRATAMENTO DE SEMENTES COMAZOSPIRILLUMSP. E DA APLICAÇÃO DE DOSES DE NITROGÊNIO MINERAL

    Directory of Open Access Journals (Sweden)

    Luís Sangoi

    2015-08-01

    Full Text Available A utilização de bactérias diazotróficas pode auxiliar a alcançar maiores produtividades e reduzir os impactos ambientais decorrentes da utilização de fertilizantes nitrogenados. Este trabalho foi conduzido com o objetivo de avaliar o efeito do tratamento de sementes com bactérias do gêneroAzospirillum e da aplicação de doses de N mineral sobre o desempenho agronômico do milho em diferentes níveis de manejo. O experimento foi conduzido no campo, na cidade de Lages, SC, durante os anos agrícolas de 2011/2012 e 2012/2013. Utilizou-se o delineamento experimental de blocos ao acaso dispostos em parcelas subsubdivididas. Na parcela principal, foram testados dois níveis de manejo, o médio, expectativa de produtividade de 8.000 kg ha-1; e o alto, expectativa de produtividade de 18.000 kg ha-1. Nas subparcelas, testaram-se quatro doses de N, equivalentes a 0; 0,5; 1; e 1,5 vez a dose recomendada pela Comissão Sul Brasileira de Química e Fertilidade do Solo para atingir a expectativa de produtividade prevista em cada nível de manejo. Nas subsubparcelas, avaliou-se o efeito do tratamento de sementes com Azospirillumsp. O rendimento de grãos variou de 8.344 a 16.947 kg ha-1 no nível de manejo alto e aumentou quadraticamente com o aumento das doses de N, tanto nas parcelas inoculadas quanto nas não inoculadas. No nível de manejo médio, os rendimentos oscilaram entre 5.986 e 9.684 kg ha-1, aumentaram linearmente com o incremento na dose de N nos tratamentos inoculados e não foram influenciados pela aplicação de N mineral nos tratamentos sem inoculação. Nos dois sistemas de manejo, a eficiência de uso do N diminuiu com o incremento na dose de N, tanto nas parcelas inoculadas quanto nas não inoculadas. Não houve diferenças significativas no rendimento de grãos dos tratamentos com e sem inoculação, independentemente do sistema de manejo e da dose de N. Portanto, o tratamento de sementes com Azospirillumsp. não melhorou o

  6. 43 CFR Appendix F to Part 2 - Mineral Leasing Act and Mineral Leasing Act for Acquired Lands-Special Rules

    Science.gov (United States)

    2010-10-01

    ... 43 Public Lands: Interior 1 2010-10-01 2010-10-01 false Mineral Leasing Act and Mineral Leasing... 2—Mineral Leasing Act and Mineral Leasing Act for Acquired Lands—Special Rules (a) Definitions. As... conduct coal exploration operations on land subject to the Mineral Leasing Act, under 30 U.S.C. 201(b),...

  7. Authigenic minerals: Biologically influenced and induced organomineralization

    Science.gov (United States)

    Dupraz, Christophe

    2016-04-01

    Organominerals are minerals precipitated by interactions with organic matter without enzymatic control. Organomineralization of authigenic carbonate minerals depends on two key components: (1) the "carbonate alkalinity engine" impacting the calcium carbonate saturation index and (2) the organic matrix comprised of extracellular organic matter (EOM), which provides a template for carbonate nucleation. The alkalinity engine can be "intrinsic" when microbial metabolisms increase supersaturation or lower the kinetic barrier of precipitation, or "extrinsic" when the physicochemical environment creates the conditions for mineral formation. The organic matrix produced by various communities within the microbial mats is known to influence nucleation, morphology and mineralogy of minerals through binding of cations. By playing with these two key components, three types of authigenic minerals can be formed: (1) a purely physicochemical precipitation on an abiotic substrate, (2) a precipitation "influenced" by the presence of an organic matrix but resulting from a physicochemical forcing (environmentally driven), or (3) a "microbially-induced" precipitation, in which both supersaturation and organic matrix are resulting from microbial activity. In this keynote, we will review important processes involved in the precipitation of authigenic carbonate minerals in modern microbial mats and open the discussion on the potential use of authigenic carbonate minerals as biosignatures in the fossil record.

  8. Mechanism of mineral formation in bone.

    Science.gov (United States)

    Anderson, H C

    1989-03-01

    The mechanism of mineral formation in bone is seen best where active new bone formation is occurring, e.g., in newly forming subperiosteal bone of the embryo, in the growing bone of young animals, and in healing rickets where the calcification process in osteoid is reactivated. A large body of ultrastructural evidence, using conventional and anhydrous methods for tissue preparation, has shown convincingly that extracellular matrix vesicles are present at or near the mineralization front in all of the above, and that these vesicles are the initial site of apatite mineral deposition. Thus bone resembles growth plate cartilage, predentin, and turkey tendon in having calcification initiated by matrix vesicles. Once the calcification cascade is begun, matrix vesicles are no longer needed to support mineralization and are consumed by the advancing mineralization front in which performed crystals serve as nuclei for the formation of new crystals. The rate of crystal proliferation is promoted by the availability of Ca2+, PO4(3-), and the presence of collagen, and retarded by naturally occurring inhibitors of mineralization such as proteoglycans and several noncollagenous calcium-binding proteins of bone including bone-Gla protein (osteocalcin), phosphoproteins, osteonectin, and alpha-2HS-glycoproteins. New electron microscopic immunocytochemical findings in our laboratory suggest that the origin of alkaline phosphatase-positive bone matrix vesicles is polarized to the mineral-facing side of osteoblasts and may be concentrated near the intercellular junctions of human embryonic osteoblasts.

  9. Mathematical Model for the Mineralization of Bone

    Science.gov (United States)

    Martin, Bruce

    1994-01-01

    A mathematical model is presented for the transport and precipitation of mineral in refilling osteons. One goal of this model was to explain calcification 'halos,' in which the bone near the haversian canal is more highly mineralized than the more peripheral lamellae, which have been mineralizing longer. It was assumed that the precipitation rate of mineral is proportional to the difference between the local concentration of calcium ions and an equilibrium concentration and that the transport of ions is by either diffusion or some other concentration gradient-dependent process. Transport of ions was assumed to be slowed by the accumulation of mineral in the matrix along the transport path. ne model also mimics bone apposition, slowing of apposition during refilling, and mineralization lag time. It was found that simple diffusion cannot account for the transport of calcium ions into mineralizing bone, because the diffusion coefficient is two orders of magnitude too low. If a more rapid concentration gradient-driven means of transport exists, the model demonstrates that osteonal geometry and variable rate of refilling work together to produce calcification halos, as well as the primary and secondary calcification effect reported in the literature.

  10. Mineral facilities of Northern and Central Eurasia

    Science.gov (United States)

    Baker, Michael S.; Elias, Nurudeen; Guzman, Eric; Soto-Viruet, Yadira

    2010-01-01

    This map displays almost 900 records of mineral facilities within the countries that formerly constituted the Union of Soviet Socialist Republics (USSR). Each record represents one commodity and one facility type at a single geographic location. Facility types include mines, oil and gas fields, and plants, such as refineries, smelters, and mills. Common commodities of interest include aluminum, cement, coal, copper, gold, iron and steel, lead, nickel, petroleum, salt, silver, and zinc. Records include attributes, such as commodity, country, location, company name, facility type and capacity (if applicable), and latitude and longitude geographical coordinates (in both degrees-minutes-seconds and decimal degrees). The data shown on this map and in table 1 were compiled from multiple sources, including (1) the most recently available data from the U.S. Geological Survey (USGS) Minerals Yearbook (Europe and Central Eurasia volume), (2) mineral statistics and information from the USGS Minerals Information Web site (http://minerals.usgs.gov/minerals/pubs/country/europe.html), and (3) data collected by the USGS minerals information country specialists from sources, such as statistical publications of individual countries, annual reports and press releases of operating companies, and trade journals. Data reflect the most recent published table of industry structure for each country at the time of this publication. Additional information is available from the country specialists listed in table 2

  11. Mineral facilities of Asia and the Pacific

    Science.gov (United States)

    Baker, Michael S.; Elias, Nurudeen; Guzman, Eric; Soto-Viruet, Yadira

    2010-01-01

    This map displays over 1,500 records of mineral facilities throughout the continent of Asia and the countries of the Pacific Ocean. Each record represents one commodity and one facility type at a single geographic location. Facility types include mines, oil and gas fields, and plants, such as refineries, smelters, and mills. Common commodities of interest include aluminum, cement, coal, copper, gold, iron and steel, lead, nickel, petroleum, salt, silver, and zinc. Records include attributes, such as commodity, country, location, company name, facility type and capacity (if applicable), and latitude and longitude geographical coordinates (in both degrees-minutes-seconds and decimal degrees). The data shown on this map and in table 1 were compiled from multiple sources, including (1) the 2008 U.S. Geological Survey Minerals Yearbook (Asia and the Pacific volume), (2) minerals statistics and information from the U.S. Geological Survey Minerals Information Web site (http://minerals.usgs.gov/minerals/), and (3) data collected by U.S. Geological Survey minerals information country specialists. Other sources include statistical publications of individual countries, annual reports and press releases of operating companies, and trade journals. Due to the sensitivity of some energy commodity data, the quality of these data should be evaluated on a country-by-country basis. Additional information is available from the country specialists listed in table 2.

  12. Marketing mix of chosen Slovak mineral water

    Directory of Open Access Journals (Sweden)

    Juhanová Silvia

    2001-09-01

    Full Text Available Considering its small area, Slovakia abounds in many sources of mineral waters and a considerable amount of them can be used for the commercial utilization. STN 86 8000 divides mineral waters in the natural mineral waters, natural mineral table waters and the natural mineral healing waters. Natural mineral water is, after the present norm, in effect water, which rises from natural trapped sources. This type of water contains more than 1 gram of dissolved substances or 1 gram of dissolved CO 2 in 1 litter. Natural mineral table water is water that, with its chemical composition as well as its physical and sensorial attributes is suitable as a refresher. It contains at least 1 gram of melted CO2 and up to 6 grams of dissolved illiquid substances in 1 litter. The mentioned substances are not characterised by any marked pharmacological effect. Natural mineral healing water is water, which with an eye to its chemical composition and physical properties, have a scientifically demonstrable effects to the human health and it is generally used for healing purposes. In the present contribution, an attention is orientated to the occurrence of listed types of waters in Slovakia, in connection with geological conditions of their circulation and accumulation and especially with possibilities of their use on the Slovak buyer’s market.The marketing mix is a complex of information, which can be regulated. Firms accumulate this information to satisfy a customer. Marketing mix of mineral waters includes information about four variables: product (characteristics of product, quality, packing, design..., prices, advertisement, distribution (the way how to get product to customer. Data listed in the contribution come from the sectional market research, which was performed between December 1st and December 22nd 2000 in twenty groceries in

  13. Perfis de comunicação política nas redes sociais online: monitoramento e tipologia das conversações nas eleições presidenciais brasileiras de 2014

    OpenAIRE

    Victor Kraide Corte Real

    2015-01-01

    A presente pesquisa analisa a comunicação dos usuários das redes sociais durante a campanha eleitoral de 2014 à presidência da República do Brasil, focando nas publicações sobre os três principais candidatos com maior percentual de intenção de voto segundo as pesquisas de opinião dos institutos Ibope e Datafolha. O corpus de análise foi baseado nas publicações feitas pelos usuários do Facebook em seus perfis pessoais e nas páginas oficiais dos três candidatos, ao longo do primeiro e do segund...

  14. Influência do boro no desenvolvimento e na composição mineral do pimentão Influence of boron application on sweet pepper development and mineral composition

    Directory of Open Access Journals (Sweden)

    Simone C. Mello

    2002-03-01

    Full Text Available O experimento foi conduzido no município de Piracicaba (SP, de fevereiro a junho de 1994, em solo classificado como Terra Roxa Estruturada eutrófica A moderado textura argilosa. Visou-se estudar a aplicação de boro no desenvolvimento e na composição mineral de plantas de pimentão cv. Magda. Adotou-se o delineamento em blocos casualizados com quatro doses de bórax aplicadas nas covas de plantio (0; 5; 10 e 20 kg ha-1 equivalentes a 0; 0,6; 1,1 e 2,2 kg ha-1 de B e quatro repetições. Avaliou-se a altura das plantas, o número de folhas e de flores, a área foliar, o peso da matéria seca da parte aérea e os teores de nutrientes nas folhas recém-maduras mais pecíolos, aos 45 dias após o transplante. Foram avaliados também, aos 40 dias após o transplante, o peso do material verde dos frutos e a composição mineral do pericarpo e das sementes dos mesmos. As doses de bórax não influenciaram as características avaliadas e os teores de macronutrientes e de B, Cu, Fe, Mn e Zn nas folhas mais pecíolos. Entre as partes dos frutos, os teores de B foram superiores nas sementes em relação ao pericarpo, nas quatro doses utilizadas.An experiment was carried out in Piracicaba (Brazil from February to June 1994, to study the effects of boron application on the development and mineral composition of sweet pepper (Capsicum annuum L., cultivar Magda. The experiment was carried out in a randomized block design with four levels of borax (0; 5; 10 and 20 kg ha-1 equivalent to 0; 0.6; 1.1 and 2.2 kg ha-1 of B and four replications. The plant height, number of leaves and flowers were evaluated, also the foliar area, dry weight of aerial part and nutrient contents in the leaves plus petioles at 45 days after transplanting date. In addition, fruit fresh weight; pericarp and seed mineral composition were evaluated 40 days after transplanting date. Different concentrations of borax did not affect the evaluated characteristics nor the macronutrient and

  15. Rheology of unstable mineral emulsions

    Directory of Open Access Journals (Sweden)

    Sokolović Dunja S.

    2013-01-01

    Full Text Available In this paper, the rheology of mineral oils and their unstable water emulsion were investigated. The oil samples were domestic crude oil UA, its fractions UA1, UA4 and blend semi-product UP1, while the concentration of oil in water emulsions was in the range from 1 up to 30%. The results were analyzed based on shear stress. The oil samples UA, UA1 and UP1 are Newtonian fluids, while UA4 is pseudoplastic fluid. The samples UA and UA4 show higher value of shear stress (83.75 Pa, 297 Pa, then other two samples UA1 and UP1 (18.41 Pa, 17.52 Pa. Rheology of investigated oils due to its complex chemical composition should be analyzed as a simultaneous effect of all their components. Therefore, structural composition of the oils was determined, namely content of paraffins, naphthenes, aromatics and asphaltenes. All samples contain paraffins, naphthenes and aromatics but only oils UA and UA4 contain asphaltenes as well. All investigated emulsions except 30% EUA4 are Newtonian fluids. The EUA4 30% emulsion shows pseudoplastic behaviour, and it is the only 30% emulsion among investigated ones that achieves lower shear stress then its oil. The characteristics of oil samples that could have an influence on their properties and their emulsion rheology, were determined. These characteristics are: neutralization number, interfacial tension, dielectric constant, and emulsivity. Oil samples UA and UA4 have significantly higher values of neutralization number, dielectric constants, and emulsivity. The sample UA has the lowest value of interface tension and the greatest emulsivity, indicating that this oil, among all investigated, has the highest preference for building emulsion. This could be the reason why 20% and 30% emulsions of the oil UA achieve the highest shear stress among all investigated emulsions.

  16. Fractal analysis of sulphidic mineral

    Directory of Open Access Journals (Sweden)

    Miklúšová Viera

    2002-03-01

    Full Text Available In this paper, the application of fractal theory in the characterization of fragmented surfaces, as well as the mass-size distributions are discussed. The investigated mineral-chalcopyrite of Slovak provenience is characterised after particle size reduction processes-crushing and grinding. The problem how the different size reduction methods influence the surface irregularities of obtained particles is solved. Mandelbrot (1983, introducing the fractal geometry, offered a new way of characterization of surface irregularities by the fractal dimension. The determination of the surface fractal dimension DS consists in measuring the specific surface by the BET method in several fractions into which the comminuted chalcopyrite is sieved. This investigation shows that the specific surface of individual fractions were higher for the crushed sample than for the short-term (3 min ground sample. The surface fractal dimension can give an information about the adsorption sites accessible to molecules of nitrogen and according to this, the value of the fractal dimension is higher for crushed sample.The effect of comminution processes on the mass distribution of particles crushed and ground in air as well as in polar liquids is also discussed. The estimation of fractal dimensions of particles mass distribution is done on the assumption that the particle size distribution is described by the power-law (1. The value of fractal dimension for the mass distribution in the crushed sample is lower than in the sample ground in air, because it is influenced by the energy required for comminution.The sample of chalcopyrite was ground (10min in ethanol and i-butanol [which according to Ikazaki (1991] are characterized by the parameter µ /V, where µ is its dipole moment and V is the molecular volume. The values of µ /V for the used polar liquids are of the same order. That is why the expressive differences in particle size distributions as well as in the values of

  17. Applications of electrochemical techniques in mineral analysis.

    Science.gov (United States)

    Niu, Yusheng; Sun, Fengyue; Xu, Yuanhong; Cong, Zhichao; Wang, Erkang

    2014-09-01

    This review, covering reports published in recent decade from 2004 to 2013, shows how electrochemical (EC) techniques such as voltammetry, electrochemical impedance spectroscopy, potentiometry, coulometry, etc., have made significant contributions in the analysis of minerals such as clay, sulfide, oxide, and oxysalt. It was discussed based on the classifications of both the types of the used EC techniques and kinds of the analyzed minerals. Furthermore, minerals as electrode modification materials for EC analysis have also been summarized. Accordingly, research vacancies and future development trends in these areas are discussed.

  18. Uranyl adsorption at clay mineral surfaces

    Energy Technology Data Exchange (ETDEWEB)

    Roesch, N.

    2014-07-01

    This first exemplary survey of actinide adsorption at complex clay mineral surfaces, which provided new insights at the atomic level, will be extended to other pertinent adsorbates like neptunyl NpO{sub 2}{sup +} and more complex minerals like iron-substituted phyllosilicates. In this way we will check if the concepts developed so far can be applied more generally, to support the interpretation of upcoming experiments. An essential facet of these studies will be to account also for the dynamical nature of the mineral/water interface by means of exemplary dynamical simulations. (orig.)

  19. Uranyl adsorption at clay mineral surfaces

    Energy Technology Data Exchange (ETDEWEB)

    Roesch, N. [Technische Univ. Muenchen (Germany). Fachgebiet Theoretische Chemie

    2016-11-01

    This first systematic survey of actinide adsorption at complex clay mineral surfaces, which provided new insights at the atomic level, is currently being extended to neptunyl NpO{sub 2}{sup +} and more complex minerals, like iron-substituted phyllosilicates. In this way we examine if the concepts developed so far can be applied more generally to support the interpretation of pertinent experiments. A further facet of these studies is to account also for the dynamic nature of the mineral/water interface by means of exemplary dynamic simulations.

  20. Normal bone mineral density in cystic fibrosis

    OpenAIRE

    Hardin, D.; R. Arumugam; Seilheimer, D.; Leblanc, A.; Ellis, K.

    2001-01-01

    BACKGROUND—Osteoporosis has been reported as a complication of cystic fibrosis (CF).
AIMS—To measure bone mineral density (BMD) in non-acutely ill adults and bone mineral content (BMC) in children with CF.
METHODS—We analysed data from 28 adults and 13 children with CF. Corticosteroid use was minimal for the year prior to study in both groups. Dual x ray absorptiometry was used to measure total body and regional bone mineral density in adults. In children, whole body BMC was...

  1. Characterization of minerals, metals and materials

    CERN Document Server

    Hwang, Jiann-Yang; Bai, Chengguang; Carpenter, John; Cai, Mingdong; Firrao, Donato; Kim, Byoung-Gon

    2012-01-01

    This state-of-the-art reference contains chapters on all aspects of the characterization of minerals, metals, and materials. The title presents papers from one of the largest yearly gatherings of materials scientists in the world and thoroughly discusses the characterization of minerals, metals, and materials The scope includes current industrial applications and research and developments in the following areas:  Characterization of Ferrous Metals Characterization of Non-Ferrous Materials Characterization of Minerals and Ceramics Character

  2. Casca de ovo como fonte de cálcio para humanos: composição mineral e análise microbiológica

    Directory of Open Access Journals (Sweden)

    Bruna Gressler Milbradt

    2015-03-01

    Full Text Available Este estudo teve como objetivo avaliar a composição mineral de diferentes tipos de cascas de ovo, bem como a segurança microbiológica de amostras submetidas a diferentes métodos de higienização. Para a obtenção do pó de casca de ovo, as cascas foram lavadas, higienizadas, secas em estufa e trituradas em moinho. Cascas de ovo de granja (criação confinada, de coloração branca e vermelha, e cascas de ovo coloniais (caipira, provenientes da região central do Rio Grande do Sul, foram comparadas quanto a sua composição mineral. O Ca, mineral predominante na casca de ovo, se manteve em concentrações semelhantes nas diferentes amostras (cerca de 365mg g-1. As cascas de ovo de granja apresentaram maior concentração de Mg e menor concentração de Sr que as cascas de ovo coloniais. Não foram encontradas quantidades significativas de Fe, Cr, Mn, Mo, Ni, Se, Al, Cd e Pb nas amostras analisadas. Adicionalmente, tanto amostras higienizadas com imersão em hipoclorito e posterior fervura em água, quanto amostras nas quais a imersão em hipoclorito foi suprimida, não apresentaram contaminação por coliformes, estafilococos ou salmonela. Os resultados indicam que a casca de ovo pode ser utilizada na nutrição humana, já que é rica em Ca, não apresenta contaminação por metais tóxicos e, se processada de forma adequada, apresenta boa qualidade higiênico-sanitária

  3. Sorção do inseticida tiametoxam nas frações orgânica e mineral de um latossolo amarelo Sorption of the insecticide thiamethoxam by organic and mineral fraction from a brazilian oxisol

    Directory of Open Access Journals (Sweden)

    Oscarlina Lúcia dos Santos Weber

    2009-01-01

    Full Text Available The sorption of thiamethoxam in a Brazilian Oxisol was determined in soil samples with and without organic matter for two different dephs (0-0.1 and 0.4-0.7 m. The results indicated a predominant sorption of thiamethoxam on soil without organic matter. The following Kd values of 4.25 mL g-1 (0-0.1 m, r² = 0.8534 and 5.30 mL g-1 (0.4-0.7 m, r² = 0.9884 and Kf values, 7.65 mL g-1 (0-0.1 m, r² = 0.9623 and 7.72 mL g-1 (0.4-0.7 m, r² = 0.9775 were obtained. Those sorption coefficient values indicated a small interaction between thiamethoxam for both original soil and soil without organic matter.

  4. Toracotomia minimamente invasiva nas intervenções cirúrgicas valvares

    Directory of Open Access Journals (Sweden)

    PEREIRA Marcelo Balestro

    1998-01-01

    Full Text Available Introdução: é tema atual a realização de procedimentos cirúrgicos por minitoracotomias que, inicialmente utilizadas para operações de revascularização do miocárdio, têm sido também propostas como acesso às operações valvares. O objetivo deste trabalho é analisar resultados da minitoracotomia em relação à técnica tradicional nas intervenções valvares, em estudo prospectivo. Casuística e métodos: entre novembro de 1996 e fevereiro de 1998, dois grupos, 8 pacientes operados por minitoracotomia (Grupo 1 e 8 controles (Grupo 2 equiparáveis nas variáveis sexo, idade, peso/altura, classe funcional pré-operatória, doença de base e operação proposta, foram submetidos a reparo ou troca valvar aórtica ou mitral. Os pacientes do Grupo 1 foram operados através de incisão paraesternal direita de até 8 cm, com circulação extracorpórea (CEC estabelecida através de canulação arterial e venosa femorais e os do Grupo 2 (controles por esternotomia mediana. Ambos os grupos foram acompanhados até a alta hospitalar. Resultados: Os parâmetros avaliados no trans-operatório e pós-operatório, bem como a análise estatística constam nas Tabelas 1 e 2. Não ocorreram óbitos imediatos. Duas complicações foram registradas: um infarto per-operatório e um acidente vascular cerebral no Grupo 2. Conclusão: os resultados parciais permitem inferir que a abordagem através de pequenas toracotomias é factível sem aumento na morbimortalidade, do tempo cirúrgico ou da estadia hospitalar. Possíveis vantagens objetivas de um método em relação a outro, exceto o aspecto estético, não estão evidentes até esta etapa do estudo.

  5. Serious Gaming for Test & Evaluation of Clean-Slate (Ab Initio) National Airspace System (NAS) Designs

    Science.gov (United States)

    Allen, B. Danette; Alexandrov, Natalia

    2016-01-01

    Incremental approaches to air transportation system development inherit current architectural constraints, which, in turn, place hard bounds on system capacity, efficiency of performance, and complexity. To enable airspace operations of the future, a clean-slate (ab initio) airspace design(s) must be considered. This ab initio National Airspace System (NAS) must be capable of accommodating increased traffic density, a broader diversity of aircraft, and on-demand mobility. System and subsystem designs should scale to accommodate the inevitable demand for airspace services that include large numbers of autonomous Unmanned Aerial Vehicles and a paradigm shift in general aviation (e.g., personal air vehicles) in addition to more traditional aerial vehicles such as commercial jetliners and weather balloons. The complex and adaptive nature of ab initio designs for the future NAS requires new approaches to validation, adding a significant physical experimentation component to analytical and simulation tools. In addition to software modeling and simulation, the ability to exercise system solutions in a flight environment will be an essential aspect of validation. The NASA Langley Research Center (LaRC) Autonomy Incubator seeks to develop a flight simulation infrastructure for ab initio modeling and simulation that assumes no specific NAS architecture and models vehicle-to-vehicle behavior to examine interactions and emergent behaviors among hundreds of intelligent aerial agents exhibiting collaborative, cooperative, coordinative, selfish, and malicious behaviors. The air transportation system of the future will be a complex adaptive system (CAS) characterized by complex and sometimes unpredictable (or unpredicted) behaviors that result from temporal and spatial interactions among large numbers of participants. A CAS not only evolves with a changing environment and adapts to it, it is closely coupled to all systems that constitute the environment. Thus, the ecosystem that

  6. RITOS DE PASSAGEM DE ESTUDANTES DE CLASSES MULTISSERIADAS RURAIS NAS ESCOLAS DA CIDADE

    Directory of Open Access Journals (Sweden)

    Elizeu Clementino de Souza

    2016-03-01

    Full Text Available O texto objetiva discutir ritos de passagem de estudantes concluintes do 5º ano do Ensino Fundamental, em classes multisseriadas em escolas rurais para as escolas da cidade, onde são obrigados a se matricular a fim de dar continuidade aos seus estudos. A partir desta problemática, ou seja, a negação do acesso à educação pública de qualidade, expressa por meio da baixa frequência ou até mesmo inexistência de escolas dos Anos Finais do Ensino Fundamental nas localidades rurais onde esses estudantes residem, é possível inferir a adoção de uma lógica de abandono, precarização e negação da escolarização para todos, por parte dos sistemas públicos de ensino. Busca-se, assim, compreender a inserção desses estudantes nas escolas da cidade, no sentido de apreender o modo como vivenciam essa transição e se reconhecem como sujeitos desse processo educativo. Para entender a dinâmica referida, teoricamente o texto ancora-se nos conceitos de diferença, diversidade, ritos de passagem e multisseriação, além de investigar tensões relacionadas às configurações do espaço rural brasileiro contemporâneo, às políticas públicas para a Educação rural/do campo e à política nacional de transporte escolar. Do ponto de vista metodológico, adotamos princípios da pesquisa (autobiográfica, com ênfase na realização de diferentes dispositivos de escritas, de entrevistas narrativas e também de análise documental, tendo em vista socializar algumas intervenções e práticas de acompanhamentos desenvolvidos em escolas que acolhem os estudantes das áreas rurais, como férteis para a construção de outras formas de inclusão dos egressos das classes multisseriadas nas escolas da cidade. Palavras-chave: Educação rural. Multisseriação. Ritos de passagem. Inclusão escolar.

  7. Emulsiones alimentarias aceite-en-agua estabilizadas con proteínas de atún

    Directory of Open Access Journals (Sweden)

    Ruiz-Márquez, D.

    2010-12-01

    Full Text Available This work is focused on the development of o/w salad dressing-type emulsions stabilized by tuna proteins. The influence of protein conservation methods after the extraction process (freezing or liofilization on the rheological properties and microstructure of these emulsions was analyzed. Processing variables during emulsification were also evaluated. Stable emulsions with adequate rheological and microstructural characteristics were prepared using 70% oil and 0.50% tuna proteins. From the experimental results obtained, we may conclude that emulsion rheological properties are not significantly affected by the protein conservation method selected. On the contrary, an increase in homogenization speed favours an increase in the values of the linear viscoelastic functions. Less significant is the fact that as agitation speed increases further, mean droplet size steadily decreases.

    El presente trabajo se ha centrado en el desarrollo de emulsiones alimentarias aceite-en-agua estabilizadas con proteínas de atún. Específicamente, se ha analizado la influencia del método de conservación de las proteínas aisladas (liofilización, congelación y de las condiciones de procesado seleccionadas sobre el comportamiento reológico y la microestructura de dichas emulsiones. Se han preparado emulsiones aceite en agua (con un contenido del 70% en peso de aceite estabilizadas con proteínas de atún. La concentración de emulsionante usada ha sido 0,50% en peso. El comportamiento reológico de estas emulsiones no depende significativamente del método de conservación de la proteína empleado. Por otra parte, un aumento de la velocidad de agitación durante el proceso de manufactura de la emulsión da lugar a una disminución continua del tamaño medio de gota y a un aumento de las funciones viscoelásticas dinámicas, menos significativo a medida que aumenta dicha velocidad de agitación.

  8. A PERCEPÇÃO DA GESTÃO DO CONHECIMENTO NAS EMPRESAS EXPORTADORAS DA AMREC

    Directory of Open Access Journals (Sweden)

    Julio Cesar Zilli

    2014-06-01

    Full Text Available Com a globalização e a era da tecnologia as empresas estão cada vez mais se utilizando do capital intelectual, que trata diretamente do conhecimento e habilidades exercitadas pelos seus colaboradores, para atuar nas atividades relacionadas ao mercado interno ou internacional. Diante do exposto, o presente estudo tem como objetivo identificar a percepção dos gestores de comércio exterior perante a Gestão do Conhecimento (GC nas empresas exportadoras da Associação dos Municípios da Região Carbonífera (AMREC. Quanto aos fins à pesquisa enquadrou-se como descritiva e quanto aos meios de investigação foi classificada como bibliográfica e de campo. A amostra foi composta por 10 empresas exportadoras que mantiveram relacionamento comercial com o mercado externo no período de janeiro a dezembro de 2012. Para a coleta de dados utilizou-se um questionário com abordagem quantitativa para conhecer a percepção dos gestores de comercio exterior em relação à identificação, criação, armazenagem, compartilhamento e utilização da Gestão do Conhecimento. Percebe-se uma sinergia desfavorável por parte dos gestores e da organização ao acompanhamento e implantação da prática de GC. Algumas barreiras como motivação e compartilhamento, relações interpessoais, apoio da estrutura e cultura organizacional estão presentes nas empresas. Para o desenvolvimento das atividades voltadas ao mercado internacional essas barreiras devem ser trabalhadas em conjunto, resultando no emprego benéfico das cinco dimensões da GC: identificação, criação, armazenagem, compartilhamento e utilização.

  9. PROTEÍNAS DE FASE AGUDA EM CÃES - REVISÃO DE LITERATURA

    Directory of Open Access Journals (Sweden)

    VIEIRA , Manuela Cristina

    2014-05-01

    Full Text Available In animals with disorder homeostasis due to infection, inflammation, tissue injury, cancer or immune disorder, there is an acute phase response (APR nonspecific. The APR is an immediate innate immune response, that produces protein mediators, they stand out among the acute phase proteins (APP, which are essential for the restoration of body homeostasis. After the stimulus generated by proinflammatory cytokines, particularly interleukin-1 (IL-1, interleukin-6 (IL-6 and tumor necrosis factor alpha (TNF-α, released by immune cells, the liver synthesizes and releases the majority of APP, which results in an increase in their bloodstream. Recent research has shown that the qualification and quantification of these proteins may aid diagnosis and provide valuable prognostic information and monitoring of diseases. Therefore, we present this review of the literature in order to describe the main PFA in small animals, and also update the veterinarians regarding the evaluation of these proteins in addition to the diagnosis, prognosis and monitoring treatment in dogs. Em animais com distúrbios na homeostase devido à infecção, inflamação, injúria tecidual, neoplasia ou desordem imunológica, há uma resposta de fase aguda (RFA inespecífica. A RFA é uma resposta imune inata imediata que produz mediadores proteicos, e entre eles se destacam as proteínas de fase aguda (PFA, que são indispensáveis para o restabelecimento da homeostasia corporal. Após o estímulo gerado pelas citocinas pró-inflamatórias, principalmente a interleucina-1 (IL-1, interleucina-6 (IL-6 e fator alfa de necrose tumoral (TNF-α, liberadas por células de defesa, o fígado sintetiza e libera a maioria das PFA, o que resulta no seu aumento na corrente sanguínea. Pesquisas recentes têm evidenciado que a qualificação e a quantificação destas proteínas podem subsidiar o diagnóstico e trazer valiosas informações prognósticas e de monitoramento de doenças. Portanto

  10. Interacción de las conidias de Paracoccidioides brasiliensis con proteínas de matriz extracelular

    Directory of Open Access Journals (Sweden)

    Luz Elena Cano

    2003-01-01

    Full Text Available En la infección por el hongo dimórfico Paracoccidioides brasiliensis, la interacción entre las conidias y los tejidos del hospedero probablemente involucra el reconocimiento específico de proteínas
    de matriz extracelular (MEC por las propágulas del hongo (1. Se ha
    observado que algunas proteínas de MEC pueden mediar la adherencia de varios microorganismos patógenos a los tejidos del hospedero, cumpliendo así un papel fundamental en el establecimiento de las enfermedades micóticas invasoras (2. Con este estudio, se pretende evaluar la capacidad de las propágulas de P. brasiliensis para interactuar con proteínas de MEC que representan un blanco potencial de unión.

  11. Mineral analysis of rabbit meat produced in Belo Horizonte, Brazil Análise mineral da carne de coelho produzida em Belo Horizonte, Brasil

    Directory of Open Access Journals (Sweden)

    Maria Ângela de Barros Correia Menezes

    2008-06-01

    Full Text Available Many authors have been pointed out that there is a lack of a more comprehensive database on mineral composition of ingredients used in man and animal nutrition. The goal of this project was to assess the mineral composition of the rabbit meat, an usual protein source in the Mediterranean diet, considered one of the most complete and healthy diet in the whole world. Ninth five rabbits of 72 days of life were slaughtered and their longissimus dorsi tissues were collected. Neutron Activation Analysis of each sample was carried-out to assess the mineral content of many elements present in the rabbit muscle samples. An edible portion of 100g presents: Cl = 52.2 ± 13.2; Cr = 0.118 ± 0.020; Cs = 0.0079 ± 0.0016; K = 485 ± 65; Mg = 39.4 ± 4.0; Na = 36.0 ± 8.0; Rb = 1.18 ± 0.17; Zn = 1.03 ± 0.19. Results for Cs and Rb are unheard-of at all in the world. Ba, Br, Ce, U e As were also analysed, and their contents were below of their detection limits. Database of several elements is a helpful tool to formulate human diet. Rabbit meat certainly is a low caloric choice, with less sodium and more potassium than beef.Muitos autores têm chamado atenção para a falta de dados mais abrangentes sobre a composição mineral de produtos usados na alimentação humana e animal. O objetivo deste trabalho foi de avaliar a composição mineral da carne de coelho, fonte de proteínas comum na dieta mediterrânea, considerada uma das dietas mais completas e saudáveis do mundo. Noventa e cinco coelhos de 72 dias de vida foram abatidos e seus tecidos longissimus dorsi foram coletados. A técnica nuclear de análise por ativação neutrônica foi empregada no intuito de obter-se as concentrações de diversos elementos presentes nas amostras de músculo de coelho usadas na alimentação humana. Uma porção comestível de 100 g apresenta: Cl = 52,2 ± 13,2; Cr = 0,118 ± 0,020; Cs = 0,0079 ± 0,0016; K = 485 ± 65; Mg = 39,4 ± 4,0; Na = 36,0 ± 8,0; Rb = 1,18 ± 0

  12. Proteínas antifúngicas contra p. infestans en los espacios intercelulares de hojas de tomate (lycopersicon esculentum cerasiforme) posibles defensinas de plantas

    OpenAIRE

    Luz Dary Riaño; Humberto Miguel Zamora

    2008-01-01

    Se aislaron y caracterizaron parcialmente proteínas antifúngicas de los espacios intercelulares de hojas de tomate Lycopersicon esculentum cerasiforme, variedad que ha mostrado resistencia en campo a Phytophthora Infestans; se observó quedespués de inoculación con el patógeno dichas proteínas se acumularon sistémicamente en la planta. Las proteínas identificadasmostraron características de Defensinas de plantas, una nueva f...

  13. Localización Inmunohistoquímica de las Proteínas Onco-Placentarias en las Neoplasias del Aparato Reproductor.

    OpenAIRE

    Parrilla Márquez, Antonino

    2016-01-01

    Durante los últimos veinte años se han descubierto un gran número de nuevas proteínas en la placenta humana. Inicialmente, fueron denominadas “Proteínas Placentarias”, ya que se pensaba, que eran sintetizadas exclusivamente por ésta. En la actualidad, las proteínas placentarias que denominaremos de “nuevas generación” por su reciente descubrimiento, se han clasificado en tres grandes grupos: 1.- Proteí...

  14. Mineral transformations during the dissolution of uranium ore minerals by dissimilatory metal-reducing bacteria

    Science.gov (United States)

    Glasauer, S.; Weidler, P.; Fakra, S.; Tyliszczak, T.; Shuh, D.

    2011-12-01

    Carnotite minerals [X2(UO2)2(VO4)2]; X = K, Ca, Ba, Mn, Na, Cu or Pb] form the major ore of uranium in the Colorado Plateau. These deposits are highly oxidized and contain U(VI) and V(IV). The biotransformation of U(VI) bound in carnotite by bacteria during dissimilatory metal reduction presents a complex puzzle in mineral chemistry. Both U(VI) and V(V) can be respired by metal reducing bacteria, and the mineral structure can change depending on the associated counterion. We incubated anaerobic cultures of S. putrefaciens CN32 with natural carnotite minerals from southeastern Utah in a nutrient-limited defined medium. Strain CN32 is a gram negative bacterium and a terrestrial isolate from New Mexico. The mineral and metal transformations were compared to a system that contained similar concentrations of soluble U(VI) and V(V). Electron (SEM, TEM) microscopies and x-ray spectromicroscopy (STXM) were used in conjunction with XRD to track mineral changes, and bacterial survival was monitored throughout the incubations. Slow rates of metal reduction over 10 months for the treatment with carnotite minerals revealed distinct biotic and abiotic processes, providing insight on mineral transformation and bacteria-metal interactions. The bacteria existed as small flocs or individual cells attached to the mineral phase, but did not adsorb soluble U or V, and accumulated very little of the biominerals. Reduction of mineral V(V) necessarily led to a dismantling of the carnotite structure. Bioreduction of V(V) by CN32 contributed small but profound changes to the mineral system, resulting in new minerals. Abiotic cation exchange within the carnotite group minerals induced the rearrangement of the mineral structures, leading to further mineral transformation. In contrast, bacteria survival was poor for treatments with soluble U(VI) and V(V), although both metals were reduced completely and formed solid UO2 and VO2; we also detected V(III). For these treatments, the bacteria

  15. Solid mineral fuels. Vocabulary. Kul. Terminologi

    Energy Technology Data Exchange (ETDEWEB)

    1988-01-01

    Official Danish terminology, in conjunction with the English, for solid mineral fuels. A definition of each term is given, and the publication includes both a Danish and an English index to the terms mentioned. (AB).

  16. Sorption Energy Maps of Clay Mineral Surfaces

    Energy Technology Data Exchange (ETDEWEB)

    Cygan, Randall T.; Kirkpatrick, R. James

    1999-07-19

    A molecular-level understanding of mineral-water interactions is critical for the evaluation and prediction of the sorption properties of clay minerals that may be used in various chemical and radioactive waste disposal methods. Molecular models of metal sorption incorporate empirical energy force fields, based on molecular orbital calculations and spectroscopic data, that account for Coulombic, van der Waals attractive, and short-range repulsive energies. The summation of the non-bonded energy terms at equally-spaced grid points surrounding a mineral substrate provides a three dimensional potential energy grid. The energy map can be used to determine the optimal sorption sites of metal ions on the exposed surfaces of the mineral. By using this approach, we have evaluated the crystallographic and compositional control of metal sorption on the surfaces of kaolinite and illite. Estimates of the relative sorption energy and most stable sorption sites are derived based on a rigid ion approximation.

  17. Effects of earthworms on nitrogen mineralization.

    NARCIS (Netherlands)

    Willems, J.J.G.M.; Marinissen, J.C.Y.; Blair, J.

    1996-01-01

    The influence of earthworms (Lumbricus terrestris and Aporrectodea tuberculata) on the rate of net N mineralization was studied, both in soil with intact soil structure (partly influenced by past earthworm activity) and in columns with sieved soil

  18. Mineral Resource Data System: Conterminous US

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — MRDS describes metallic and nonmetallic mineral resources throughout the world. Included are deposit name, location, commodity, deposit description, geologic...

  19. Characterisation of Kapiri Mposhi Aluminosilicate Minerals

    Directory of Open Access Journals (Sweden)

    MARINA G. XAVIER

    2014-01-01

    Full Text Available Zeolites have become recognized as the most important authigenic silicates in sedimentary rocks of volcanic origin. Along with smectites and other clay minerals, they are sensitive indicators of geochemical reactions on rocks. However, there have been few investigations on the chemistry, origin, and applications of zeolites. This study aims to characterize the zeolite group of minerals with respect to composition, crystal structure and physical properties. X-ray diffraction, scanning electron microscopy and wet chemical analysis have been used to characterize the Kapiri Mposhi aluminosilicate minerals. The characterization indicates that the major component in the mineral is calcium aluminium oxide. Loss on ignition was found to be 0.22%. Thermal analysis revealed the existence of an endothermic peak at 100-300oC due to dehydroxylation and this was accompanied by 30% mass loss.

  20. Superficial mineral resources of the Indian Ocean

    Digital Repository Service at National Institute of Oceanography (India)

    Siddiquie, H.N.; Hashimi, N.H.; Gujar, A; Valsangkar, A

    The sea floor of the Indian Ocean and the continental margins bordering the ocean are covered by a wide variety of terrigenous, biogenous and anthigenic mineral deposits. The biogenous deposits in the Indian Ocean comprise the corals on shallow...

  1. Vitamin D endocrinology of bone mineralization.

    Science.gov (United States)

    van Driel, Marjolein; van Leeuwen, Johannes P T M

    2017-09-15

    Bone is a dynamic tissue that is strongly influenced by endocrine factors to restore the balance between bone resorption and bone formation. Bone formation involves the mineralization of the extracellular matrix formed by osteoblasts. In this process the role of vitamin D (1α,25(OH)2D3) is both direct and indirect. The direct effects are enabled via the Vitamin D Receptor (VDR); the outcome is dependent on the presence of other factors as well as origin of the osteoblasts, treatment procedures and species differences. Vitamin D stimulates mineralization of human osteoblasts but is often found inhibitory for mineralization of murine osteoblasts. In this review we will overview the current knowledge of the role of the vitamin D endocrine system in controlling the mineralization process in bone. Copyright © 2017 Elsevier B.V. All rights reserved.

  2. Mineral resource of the Month: Clay

    Science.gov (United States)

    Virta, Robert L.

    2010-01-01

    Clays were one of the first mineral commodities used by people. Clay pottery has been found in archeological sites that are 12,000 years old, and clay figurines have been found in sites that are even older.

  3. NOAA and MMS Marine Minerals Geochemical Database

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — The Marine Minerals Geochemical Database was created by NGDC as a part of a project to construct a comprehensive computerized bibliography and geochemical database...

  4. Predictions of mineral assemblages in planetary interiors

    Science.gov (United States)

    Stolper, E.

    1980-01-01

    It is shown that mineral compatibilities in the model system CaO-MgO-Al2O3-SiO2 can be applied to deduce the mineral assemblages expected in planetary interiors and their variation with depth. In general, the available estimates of bulk composition of the terrestrial planets suggest that the terrestrial planets can be divided into two groups based on their predicted mineral assemblages. The terrestrial, Venusian, and lunar bulk compositions are expected to display the following sequence of mineral assemblages with increasing pressure: plagioclase lherzolite, spinel lherzolite, and garnet lherzolite. The sequences expected in Martian and Mercurian are different: spinel-plagioclase wehrlite, spinel lherzolite, and spinel-garnet wehrlite. These assemblages have a major influence on the compositions of liquids produced by melting of these planetary interiors, on the solidus temperatures, and thus on the nature of planetary differentiation and the types of magmas extruded at planetary surfaces.

  5. Major mineral deposits of the world

    Data.gov (United States)

    U.S. Geological Survey, Department of the Interior — Regional locations and general geologic setting of known deposits of major nonfuel mineral commodities. Originally compiled in five parts by diverse authors,...

  6. Influencia del pH en la estabilidad de emulsiones elaboradas con proteínas de salvado de arroz

    Directory of Open Access Journals (Sweden)

    Laura Maldonado

    2011-12-01

    Full Text Available Si bien las proteínas de origen animal en muchas instancias pueden tener mejores características funcionales que las proteínas de origen vegetal, el incremento de su costo puede favorecer al uso expansivo de las fitoproteínas como reemplazo. Una de las fuentes de proteínas de origen vegetal es el salvado de arroz, que se obtiene como subproducto en el proceso de pulido del arroz integral (Oryza santiva L para producir el arroz blanco. Se estudió los procesos de cremado, floculación y coalescencia de emulsiones preparadas con proteínas del salvado de arroz a pH 6,0 y 8,0. La obtención de las proteínas del salvado de arroz se realizó en un medio alcalino, partiendo de salvado de arroz desengrasado. El proceso de desestabilización de las emulsiones se analizó a partir de los datos obtenidos por el método de retrodispersión de luz mediante un equipo Turbiscan 2000; en el caso del cremado los datos fueron ajustados a una cinética bifásica con una componente de segundo orden (hiperbólica y otra con un comportamiento sigmoidal. Las emulsiones preparadas a pH 8 presentaron una mayor estabilidad frente al cremado, mientras que los procesos de floculación y coalescencia no fueron influenciados por los distintos valores de pH.

  7. Tax competition for mineral oils in EU

    OpenAIRE

    Lichterová, Markéta

    2012-01-01

    This thesis compares the tax competition in excise duty of mineral oil between the groups of the old and new member states of the Europian union. Is based on the result of the analysis for the mineral oils (unleaded petrol,gas oil, havy fuel oil and LPG). Based on this analysis assess whether there is the tax competition. The results of analysis shows that there is the tax competition for the mobile tax bases.

  8. Thyroid disorders and bone mineral metabolism

    Directory of Open Access Journals (Sweden)

    Dinesh Kumar Dhanwal

    2011-01-01

    Full Text Available Thyroid diseases have widespread systemic manifestations including their effect on bone metabolism. On one hand, the effects of thyrotoxicosis including subclinical disease have received wide attention from researchers over the last century as it an important cause of secondary osteoporosis. On the other hand, hypothyroidism has received lesser attention as its effect on bone mineral metabolism is minimal. Therefore, this review will primarily focus on thyrotoxicosis and its impact on bone mineral metabolism.

  9. Wood-mineral wool hybrid particleboards

    OpenAIRE

    Mamiński, M. Ł.; Król, M. E.; Jaskółowski, W.; Borysiuk, P.

    2010-01-01

    Abstract The objective of this work was to compound mineral wool with wood particles in the production of particleboards of reduced flammability. Three series of boards with various contents of mineral wool (10, 20, 30 wt%) were successfully manufactured using urea-formaldehyde resin as binder. Thickness swelling, mechanical and thermal properties as well as ignitability of the boards were assessed. It occurred that reduced ignitability is accompanied by a decrease in mechanical pe...

  10. Industrial mineral powder production in China

    Institute of Scientific and Technical Information of China (English)

    2007-01-01

    The recent annual output of major industrial mineral powders in the mainland of China has been more than 100 million t, accompanied by active development of such supporting technology as comminution, classification, separation/purification, and surface modification. In particular, the present paper reviews technologies for preparing ultra-fine particles involving dry and wet processing, modification and composition, calcination of kaolin clay, and processing of spherical/acerous industrial minerals.

  11. Exploring data with RapidMiner

    CERN Document Server

    Chisholm, Andrew

    2013-01-01

    A step-by-step tutorial style using examples so that users of different levels will benefit from the facilities offered by RapidMiner.If you are a computer scientist or an engineer who has real data from which you want to extract value, this book is ideal for you. You will need to have at least a basic awareness of data mining techniques and some exposure to RapidMiner.

  12. Metals, minerals and microbes: geomicrobiology and bioremediation.

    Science.gov (United States)

    Gadd, Geoffrey Michael

    2010-03-01

    Microbes play key geoactive roles in the biosphere, particularly in the areas of element biotransformations and biogeochemical cycling, metal and mineral transformations, decomposition, bioweathering, and soil and sediment formation. All kinds of microbes, including prokaryotes and eukaryotes and their symbiotic associations with each other and 'higher organisms', can contribute actively to geological phenomena, and central to many such geomicrobial processes are transformations of metals and minerals. Microbes have a variety of properties that can effect changes in metal speciation, toxicity and mobility, as well as mineral formation or mineral dissolution or deterioration. Such mechanisms are important components of natural biogeochemical cycles for metals as well as associated elements in biomass, soil, rocks and minerals, e.g. sulfur and phosphorus, and metalloids, actinides and metal radionuclides. Apart from being important in natural biosphere processes, metal and mineral transformations can have beneficial or detrimental consequences in a human context. Bioremediation is the application of biological systems to the clean-up of organic and inorganic pollution, with bacteria and fungi being the most important organisms for reclamation, immobilization or detoxification of metallic and radionuclide pollutants. Some biominerals or metallic elements deposited by microbes have catalytic and other properties in nanoparticle, crystalline or colloidal forms, and these are relevant to the development of novel biomaterials for technological and antimicrobial purposes. On the negative side, metal and mineral transformations by microbes may result in spoilage and destruction of natural and synthetic materials, rock and mineral-based building materials (e.g. concrete), acid mine drainage and associated metal pollution, biocorrosion of metals, alloys and related substances, and adverse effects on radionuclide speciation, mobility and containment, all with immense social

  13. The Global Flows of Metals and Minerals

    Science.gov (United States)

    Rogich, Donald G.; Matos, Grecia R.

    2008-01-01

    This paper provides a preliminary review of the trends in worldwide metals and industrial minerals production and consumption based on newly developed global metals and minerals Material Flow Accounts (MFA). The MFA developed encompass data on extraction and consumption for 25 metal and mineral commodities, on a country-by-country and year-by-year basis, for the period 1970 to 2004. The data-base, jointly developed by the authors, resides with the U.S. Geological Survey (USGS) as individual commodity Excel workbooks and within a Filemaker data management system for use in analysis. Numerous national MFA have been developed to provide information on the industrial metabolism of individual countries. These MFA include material flows associated with the four commodity categories of goods that are inputs to a country's economy, agriculture, forestry, metals and minerals, and nonrenewable organic material. In some cases, the material flows associated with the creation and maintenance of the built infrastructure (such as houses, buildings, roads, airports, dams, and so forth) were also examined. The creation of global metals and industrial minerals flows is viewed as a first step in the creation of comprehensive global MFA documenting the historical and current flows of all of the four categories of physical goods that support world economies. Metals and minerals represent a major category of nonrenewable resources that humans extract from and return to the natural ecosystem. As human populations and economies have increased, metals and industrial minerals use has increased concomitantly. This dramatic growth in metals and minerals use has serious implications for both the availability of future resources and the health of the environment, which is affected by the outputs associated with their use. This paper provides an overview of a number of the trends observed by examining the database and suggests areas for future study.

  14. Water-Signature Mineral Found by Spirit

    Science.gov (United States)

    2004-01-01

    This spectrum, taken by the Mars Exploration Rover Spirit's Moessbauer spectrometer, shows the presence of an iron-bearing mineral called goethite in a rock called 'Clovis' in the 'Columbia Hills' of Mars. Goethite contains water in the form of hydroxyl as a part of its structure. By identifying this mineral, the examination of Clovis produced strong evidence for past water activity in the area that Spirit is exploring.

  15. Detecção de proteínas imunorreativas de Rickettsia sp. cepa Mata Atlântica

    Directory of Open Access Journals (Sweden)

    Caroline S. Oliveira

    Full Text Available RESUMO: A Febre Maculosa Brasileira (FMB é uma doença infecciosa, transmitida por carrapatos ao homem. Uma nova riquetsiose humana foi descrita como causadora de Febre Maculosa no Estado de São Paulo, sendo denominada de Rickettsia sp. cepa Mata Atlântica. O presente trabalho teve como objetivo detectar e identificar proteínas com potencial de estimular o sistema imune de hospedeiro mamífero, desta nova cepa descrita. Para tanto, foi realizado a extração proteica total de Rickettsia sp. cepa Mata Atlântica. As proteínas extraídas foram fracionadas por eletroforese. As bandas proteicas foram transferidas para membranas de nitrocelulose por migração elétrica e submetidas à técnica de Western-blot, para detecção proteica. Ao todo sete proteínas imunorreativas foram detectadas. Duas proteínas apresentaram maior abundancia, com peso molecular, de 200 e 130 kDa respectivamente. Através da comparação de mapas proteômicos existentes e pelo peso molecular que estas proteínas apresentaram, sugere-se que as duas proteínas detectadas representem rOmpA (200 kDa e rOmpB (130 kDa. As demais proteínas detectadas apresentaram menor ocorrência e peso molecular inferior a 78 kDa, podendo representar membros da família de antígenos de superfície celular (Sca - Surface cell antigen. As proteínas detectadas poderão servir como base de estudo na elaboração de métodos diagnósticos sensíveis e específicos, no desenvolvimento de vacinas, além de possibilitarem novos estudos para terapias mais eficazes.

  16. Estrategias multi-etiqueta orientadas a la predicción funcional de proteínas en organismos embryophyta

    OpenAIRE

    Giraldo Forero, Andrés Felipe

    2015-01-01

    Tradicionalmente, la identificación de funciones en proteínas se ha venido desarrollando por complejos y costosos procedimientos experimentales junto con mecanismos computacionales que buscan similitudes a través de alineamientos secuencia-secuencia, secuencia-perfiles, entre otros. Sin embargo, estos métodos pierden efectividad cuando proteínas con igual función presentan bajas similitudes, los sistemas más recientes emplean métodos de aprendizaje de maquina en espacios que son representados...

  17. Complexo distrofina-gllcoproteínas - a propósito de um doente com distrofia de Becker

    OpenAIRE

    Monteiro, Cecília; Taipa, Ricardo; Melo Pires, Manuel; Guimarães, António; Gonçalves, Ana Rita; Vieira, Emília; Santos, Rosário; Santos, Manuela

    2012-01-01

    Introdução: A distrofina faz parte do complexo distrofina-glicoproteínas (DAG - dystrophin associated glicoproteins) que inclui as sarcoglicanos α, β, y e δ, bem com as distroglicanos α e β. O estudo imunohistoquímico da biopsia muscular das distrofinopatias pode assim mostrar alterações na marcação não só da distrofina, como também das outras proteínas associadas. Caso clínico: Apresentamos um doente do sexo masculino com quadro clínico caracterizado por cãibras e dores musculares d...

  18. Detecção e caracterização de proteínas parasporinas em Bacillus thuringiensis

    OpenAIRE

    Sabiá Júnior, Elias Ferreira

    2015-01-01

    A bactéria Gram-positiva Bacillus thuringiensis (Bt) é amplamente conhecida devido à sua grande importância no controle biológico, graças à sua capacidade de produzir inclusões cristalinas formadas por proteínas inseticidas (Cry e Cyt), ativas contra um amplo espectro de insetos. Uma nova atividade foi relatada para cristais sem atividade inseticida, a citotoxicidade contra células cancerosas humanas. Essas proteínas citotóxicas, chamadas de Parasporinas (PS), não são hemolíticas e são estrut...

  19. [Assessment of lipid profiles and bone mineral density in renal transplant patients].

    Science.gov (United States)

    Fernández Castillo, Rafael; Fernández Gallegos, Ruth; Peña Amaro, María Pilar; Esteban de la Rosa, Rafael José

    2015-06-01

    Introducción: las alteraciones del metabolismo lipídico y del metabolismo mineral óseo son trastornos frecuentes entre los pacientes trasplantados renales, lo que contribuye a la aparación de enfermedades matabólicas y cardiovasculares que ponen en peligro la integridad del injerto. Objetivo: describir y observar la evolución de las alteraciones de la densidad mineral ósea (DMO) y las alteraciones lipídicas en una población de pacientes trasplantados renales. Material y método: en este trabajo se ha seguido a 119 pacientes de ambos sexos trasplantados renales, a los cuales se les realizaron mediciones pretrasplante y postrasplante durante cinco años de parámetros bioquímicos, mediciones antropométricas y de la densidad mineral ósea en columna lumbar, fémur y radio-cubital. Resultados: durante los cinco años tras el trasplante se produce un importante aumento de parámetros bioquímicos, IMC, dislipemia, diabetes e hipertensión arterial. A los seis meses existe un alto porcentaje de pacientes con DMO patológica, aumentando un 4,1% al año del trasplante. Conclusiones: tras el trasplante se produce un gran incremento de la hiperlipidemia que se asocia con un patrón característico de alteración de lípidos con elevación del colesterol total, lipoproteínas de baja densidad, lipoproteínas de alta densidad, así como el consiguiente aumento de los triglicéridos, a pesar del tratamiento con estatinas, lo que conlleva un aumento en los factores de riego de padecer diabetes, hipertension arterial y enfermedades cardiovasculares; además se produce una pérdida de masa ósea, lo que conlleva un alto riesgo de sufrir fracturas graves, poniendo en peligro el injerto renal y la calidad de vida del paciente.

  20. Research on the Security of the United Storage Network Based on NAS

    Institute of Scientific and Technical Information of China (English)

    HUANG Jian-zhong; HAN De-zhi; XIE Chang-sheng

    2004-01-01

    A multi-user view file system (MUVFS) and a security scheme are developed to improve the security of the united storage network (USN) that integrates a network attached storage (NAS) and a storage area network (SAN). The MUVFS offers a storage volume view for each authorized user who can access only the data in his own storage volume, the security scheme enables all users to encrypt and decrypt the data of their own storage view at client-side, and the USN server needs only to check the users' identities and the data's integrity. Experiments were performed to compare the sequential read, write and read/write rates of NFS+MUVFS+secure_module with those of NFS. The results indicate that the security of the USN is improved greatly with little influence on the system performance when the MUVFS and the security scheme are integrated into it.