Presentación del Libro, “Epilepsia. Aspectos Clínicos y Psicosociales”.

Directory of Open Access Journals (Sweden)

Carlos Medina Malo

2006-12-01

aspectos biológicos. Es excelente porque muestra el equipo que reunió el Dr. Medina, a los integrantes de la Liga contra la Epilepsia, que se ve reflejada en ese aspecto biopsicosocial de la persona con epilepsia.

Dental caries and chemical analyses in reconstruction of diet, health and hygienic behaviour in the Middle Euphrates valley (Syria).

Science.gov (United States)

Tomczyk, Jacek; Szostek, Krzysztof; Komarnitki, Iulian; Mańkowska-Pliszka, Hanna; Zalewska, Marta

2013-06-01

The aim of this study was to use two methods, biological and chemical, to examine changes in diet and health in individuals from the Middle Euphrates valley (Syria). We determined the frequency distribution of dental caries. Chemical analyses were concerned with the presence of elements such as strontium, barium, calcium and stable carbon isotopes ((13)C/(14)C). We chose three consecutive periods: Late Roman (2nd-4th century AD), Islamic (600-1200 AD) and Modern Islamic (1850-1950 AD). We analysed the dental remains of 145 individuals, with a total of 2530 teeth. We used visual research (magnifying glass/sharp dental probe) and radiography. The frequencies of caries were calculated on the basis of the proportional correction factor of Erdal and Duyar. We chose 39 permanent second molars for chemical analyses. The frequency of carious lesions was similar in all three periods (6-8%). In the Modern Islamic and Islamic periods, occlusal surfaces were infected with caries most often, while the cemento-enamel junction (CEJ) and approximal surfaces were affected to a lesser degree. However, in the Late Roman period, the CEJ and approximal surfaces showed caries most frequently, in contrast to occlusal surfaces, which seldom showed signs of caries. Chemical analyses showed lower Sr/Ca ratios and Observed Ratio index values for the Modern Islamic and higher values for the Islamic and Late Roman periods. Mean stable isotope (δ(13)C) analyses demonstrated that the Modern Islamic period was strongly divergent from the other periods. These data suggest a similar socio-economic status during the Late Roman and Islamic periods. The diet of the population living in the Late Roman and Islamic periods contained a larger number of products containing strontium than calcium. In the modern population these proportions have been reversed. Copyright © 2013 Elsevier Ltd. All rights reserved.

Evaluation of Two Surface Sampling Methods for Microbiological and Chemical Analyses To Assess the Presence of Biofilms in Food Companies.

Science.gov (United States)

Maes, Sharon; Huu, Son Nguyen; Heyndrickx, Marc; Weyenberg, Stephanie van; Steenackers, Hans; Verplaetse, Alex; Vackier, Thijs; Sampers, Imca; Raes, Katleen; Reu, Koen De

2017-12-01

Biofilms are an important source of contamination in food companies, yet the composition of biofilms in practice is still mostly unknown. The chemical and microbiological characterization of surface samples taken after cleaning and disinfection is very important to distinguish free-living bacteria from the attached bacteria in biofilms. In this study, sampling methods that are potentially useful for both chemical and microbiological analyses of surface samples were evaluated. In the manufacturing facilities of eight Belgian food companies, surfaces were sampled after cleaning and disinfection using two sampling methods: the scraper-flocked swab method and the sponge stick method. Microbiological and chemical analyses were performed on these samples to evaluate the suitability of the sampling methods for the quantification of extracellular polymeric substance components and microorganisms originating from biofilms in these facilities. The scraper-flocked swab method was most suitable for chemical analyses of the samples because the material in these swabs did not interfere with determination of the chemical components. For microbiological enumerations, the sponge stick method was slightly but not significantly more effective than the scraper-flocked swab method. In all but one of the facilities, at least 20% of the sampled surfaces had more than 10 2 CFU/100 cm 2 . Proteins were found in 20% of the chemically analyzed surface samples, and carbohydrates and uronic acids were found in 15 and 8% of the samples, respectively. When chemical and microbiological results were combined, 17% of the sampled surfaces were contaminated with both microorganisms and at least one of the analyzed chemical components; thus, these surfaces were characterized as carrying biofilm. Overall, microbiological contamination in the food industry is highly variable by food sector and even within a facility at various sampling points and sampling times.

Chemical analyses of wasp-associated streptomyces bacteria reveal a prolific potential for natural products discovery

DEFF Research Database (Denmark)

Poulsen, Michael; Oh, Dong-Chan; Clardy, Jon

2011-01-01

and solitary Hymenoptera. Here we test this possibility by examining two species of solitary mud dauber wasps, Sceliphron caementarium and Chalybion californicum. We performed enrichment isolations from 33 wasps and obtained more than 200 isolates of Streptomyces Actinobacteria. Chemical analyses of 15...... and antibacterial activity. The prevalence and anti-microbial properties of Actinobacteria associated with these two solitary wasp species suggest the potential role of these Streptomyces as antibiotic-producing symbionts, potentially helping defend their wasp hosts from pathogenic microbes. Finding...... phylogenetically diverse and chemically prolific Actinobacteria from solitary wasps suggests that insect-associated Actinobacteria can provide a valuable source of novel natural products of pharmaceutical interest....

Aspectos psicosociales en universitarias embarazadas

OpenAIRE

Estupiñán-Aponte, María R.; Rodríguez-Barreto, Lucía

2009-01-01

Objetivo Determinar los aspectos psicosociales relacionados con el embarazo en estudiantes universitarias.Metodología A partir de la revisión de archivos y el muestreo intencional, se seleccionaron 68 estudiantes que tuvieron un embarazo adolescente. Mediante relatos de vida y entrevistas en profundidad se analizan las implicaciones del embarazo en la condición personal, familiar y académica.Resultados Durante el primer trimestre de embarazo, se generan crisis y ajustes en la estructura famil...

Carbon speciation in ash, residual waste and contaminated soil by thermal and chemical analyses.

Science.gov (United States)

Kumpiene, Jurate; Robinson, Ryan; Brännvall, Evelina; Nordmark, Désirée; Bjurström, Henrik; Andreas, Lale; Lagerkvist, Anders; Ecke, Holger

2011-01-01

Carbon in waste can occur as inorganic (IC), organic (OC) and elemental carbon (EC) each having distinct chemical properties and possible environmental effects. In this study, carbon speciation was performed using thermogravimetric analysis (TGA), chemical degradation tests and the standard total organic carbon (TOC) measurement procedures in three types of waste materials (bottom ash, residual waste and contaminated soil). Over 50% of the total carbon (TC) in all studied materials (72% in ash and residual waste, and 59% in soil) was biologically non-reactive or EC as determined by thermogravimetric analyses. The speciation of TOC by chemical degradation also showed a presence of a non-degradable C fraction in all materials (60% of TOC in ash, 30% in residual waste and 13% in soil), though in smaller amounts than those determined by TGA. In principle, chemical degradation method can give an indication of the presence of potentially inert C in various waste materials, while TGA is a more precise technique for C speciation, given that waste-specific method adjustments are made. The standard TOC measurement yields exaggerated estimates of organic carbon and may therefore overestimate the potential environmental impacts (e.g. landfill gas generation) of waste materials in a landfill environment. Copyright © 2010 Elsevier Ltd. All rights reserved.

Treatment of spices with ionizing radiation - chemical, organoleptical, microbiological and toxicological analyses. Pt. 2

International Nuclear Information System (INIS)

Schuettler, C.; Boegl, W.

1984-09-01

In the present second part of a study of the relevant literature the results of tests on 14 radiation treated spices and 2 radiation treated spice-mixtures were evaluated. The tests in this part contain mainly toxicological but also chemical and sensorial analyses. Most of the spices were treated with gamma radiation from cobalt-60 sources with doses between 80 Gy and 60 kGy. This part contains a cumulated subject index for part 1 and part 2. (orig./AJ) [de

Aspectos subjetivos relacionados con la violencia intrafamiliar. Caso municipio de Sabaneta Antioquia

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Naidalis Yadira Martínez

2016-01-01

Full Text Available El artículo identifica las interacciones en aspectos familiares y subjetivos. En el artículo se desarrollan los aspectos subjetivos de las dinámicas familiares que justifican el uso y la implementación de la violencia intrafamiliar, se da cuenta de la naturalización de la violencia intrafamiliar en la interacción de los grupos familiares, convirtiéndola en un elemento de la relación que se establece entre los miembros de la familia. En el análisis realizado se identifican aspectos coyunturales asociados a situaciones que se vivieron en la dinámica de la familia de origen, pero que al momento han sido pocas las condiciones que permiten la modi- ficación de estas conductas ya que las familias han asumido estas expresiones de violencia intrafamiliar como parte de sus vidas.

Exploración de repositorios de software y análisis de potenciales extensiones a aspectos

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Graciela Beatriz Vidal

2014-06-01

Full Text Available Tanto el Desarrollo basado en Componentes como el Desarrollo de Software orientado a Aspectos son enfoque propuestos para abordar diversos problemas que surgen en el proceso de desarrollo de aplicaciones. Ambos enfoques tienen como objetivo el reuso de software, ante esta situación surge la necesidad de que componentes y aspectos compartan un espacio común en el cual puedan ser publicados, recuperados y reutilizados. Los repositorios actuales parecen no proveer aspectos de manera explícita, en ocasiones los aspectos son utilizados para especificar el componente, pero no son reusables. La tarea de publicar y recuperar componentes es muy compleja, existen diversos métodos de publicación y recuperación a tal fin. En este trabajo se exploraron diferentes repositorios analizando criterios al igual que se exponen los métodos de publicación y recuperación con el fin de determinar si es posible la adaptación o extensión de los repositorios a aspectos.

Evaluation Of Plutonium Oxide Destructive Chemical Analyses For Validity Of Original 3013 Container Binning

International Nuclear Information System (INIS)

Mcclard, J.; Kessinger, G.

2010-01-01

The surveillance program for 3013 containers is based, in part, on the separation of containers into various bins related to potential container failure mechanisms. The containers are assigned to bins based on moisture content and pre-storage estimates of content chemistry. While moisture content is measured during the packaging of each container, chemistry estimates are made by using a combination of process knowledge, packaging data and prompt gamma analyses to establish the moisture and chloride/fluoride content of the materials. Packages with high moisture and chloride/fluoride contents receive more detailed surveillances than packages with less chloride/fluoride and/or moisture. Moisture verification measurements and chemical analyses performed during the surveillance program provided an opportunity to validate the binning process. Validation results demonstrated that the binning effort was generally successful in placing the containers in the appropriate bin for surveillance and analysis.

O exercício físico e os aspectos psicobiológicos El ejercicio físico y los aspectos psicobiológicos Physical exercise and the psychobiological aspects

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Marco Túlio de Mello

2005-06-01

Full Text Available O objetivo desta revisão é trazer parte dos estudos sobre um assunto pouco explorado: a relação entre o exercício físico e os aspectos psicobiológicos. A importância da compreensão desses aspectos e como eles afetam a qualidade de vida do ser humano é o que estimula as pesquisas sobre esse assunto. A literatura destaca que a prática regular de exercício físico traz resultados positivos não somente ao sono e aos seus possíveis distúrbios, mas também aos aspectos psicológicos e aos transtornos de humor, como a ansiedade e a depressão, e aos aspectos cognitivos, como a memória e a aprendizagem. Contudo, há indivíduos que se envolvem na prática de exercícios físicos com tal intensidade e/ou freqüência ou, ainda, fazem uso de drogas ilícitas que podem trazer prejuízos à saúde, como, por exemplo, o dependente de exercício físico e o usuário de esteróides anabolizantes. O exercício físico provoca alterações fisiológicas, bioquímicas e psicológicas, portanto, pode ser considerado uma intervenção não-medicamentosa para o tratamento de distúrbios relacionados aos aspectos psicobiológicos.El objetivo de esta revisión es trazer parte de los estudios sobre un asunto poco explorado: la relación ejercicio físico y los aspectos psicobiológicos. La importancia de la comprensión de estos aspectos y como ellos afectan la calidad de vida del ser humano és lo que estimula las pesquisas sobre este asunto. La literatura destaca que la práctica regular del ejercicio físico trae resultados positivos no solamente al sueño y a los posibles distúrbios, más también a los aspectos psicológicos y los trastornos del humor, como la ansiedad y la depresión, y los aspectos cognitivos, como la memoria y el aprendizaje. Con todo hay individuos que se envuelven en la práctica de ejercícios físicos con tal intensidad y / o frecuencia o, donde, hacen usos de drogas ilícitas que pueden traer perjuicios a la salud, como

Criptococose pulmonar: aspectos na tomografia computadorizada

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Silva Ana Carina Gamboa da

2003-01-01

Full Text Available A criptococose pulmonar é uma doença causada pelo Criptococcus neoformans, um fungo unimórfico que possui distribuição mundial, existindo na mesma forma tanto no seu habitat natural quanto em animais e humanos. A doença possui apresentações clínica e patológica variáveis e pode manifestar-se tanto em pacientes com a imunidade normal como em imunocomprometidos, que representam a maioria dos casos. Neste trabalho são analisados os aspectos encontrados nas tomografias computadorizadas do tórax de 14 pacientes com criptococose pulmonar confirmada. Os achados mais freqüentes na tomografia do tórax foram as massas e os nódulos pulmonares. Outros aspectos observados foram as áreas de escavação, as consolidações, o espessamento do interstício peribroncovascular e o reticulado difuso. Massa pulmonar foi o achado isolado mais comum (64,2%, seguido dos nódulos isolados ou múltiplos (35,7%. Doença pulmonar difusa foi vista em apenas 14,2% dos casos. Os lobos superiores foram os mais comprometidos, sendo a doença mais comum nas regiões anteriores. A tomografia do tórax permitiu avaliar com precisão o grau de comprometimento do parênquima pulmonar.

Historical Weathering Based on Chemical Analyses of Two Spodosols in Southern Sweden

International Nuclear Information System (INIS)

Melkerud, Per-Arne; Bain, Derek C.; Olsson, Mats T.

2003-01-01

Chemical weathering losses were calculated for two conifer stands in relation to ongoing studies on liming effects and ash amendments on chemical status, soil solution chemistry and soil genesis. Weathering losses were based on elemental depletion trends in soil profiles since deglaciation and exposure to the weathering environment. Gradients in total geochemical composition were assumed to reflect alteration over time. Study sites were Horroed and Hassloev in southern Sweden. Both Horroed and Hassloev sites are located on sandy loamy Weichselian till at an altitude of 85 and 190 m a.s.l., respectively. Aliquots from volume determined samples from a number of soil levels were fused with lithium metaborate, dissolved in HNO 3 , and analysed by ICP - AES. Results indicated highest cumulative weathering losses at Hassloev. The weathering losses for the elements are in the following order:Si > Al > K > Na > Ca > MgTotal annual losses for Ca+Mg+K+Na, expressed in mmol c m -2 yr -1 , amounted to c. 28 and 58 at Horroed and Hassloev, respectively. Variations between study sites could not be explained by differences in bulk density, geochemistry or mineralogy. The accumulated weathering losses since deglaciation were larger in the uppermost 15 cm than in deeper B horizons for most elements studied

Contenedores: Aspectos tecnicos, biologicos y economicos

Science.gov (United States)

Tara Luna; Thomas D. Landis; R. Kasten Dumroese

2012-01-01

La elección del contenedor es una de las consideraciones más importantes al establecer un nuevo vivero o empezar a producir una especie nueva. El tipo y tamaño de contenedor no sólo determina la cantidad de agua y nutrientes minerales que están disponibles para el crecimiento de una planta, sino que también afecta otros aspectos operativos del vivero, como el tamaño de...

Meningites bacterianas no lactente aspectos neurológicos

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M. Valeriana L. de Moura-Ribeiro

1990-06-01

Full Text Available Aspectos clínicos, neurológicos e laboratoriais das meningites bacterianas agudas no lactente são criticamente analisados em função da experiência da autora. São apresentadas considerações fisiopatológicas sobre os eventos que ocorrem na fase aguda desses processos.

ASPECTOS NORTEADORES NA ORIENTAÇÃO DE MONOGRAFIA A DISTÂNCIA

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monica seixas mello

2012-12-01

Full Text Available O objetivo do presente estudo é analisar os aspectos norteadores na orientação de monografia na modalidade a distância a partir de relato de experiência em curso de pó-graduação Lato Sensu em Gestão Pública., constatando-se que na orientação a distância em ambientes virtuais de aprendizagem as interações entre professor e aluno observam os seguintes aspectos: pedagógico, gerencial, social e técnico Palavras-chaves: educação, distância, orientação, monografia, pos-graduação.

Development and the physical, chemical, microbiological and sensory analyses of red pepper seasoned with parmesan cheese - doi: 10.4025/actascitechnol.v35i3.12794

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Gisele Teixeira de Souza Sora

2013-06-01

Full Text Available Pickles comprising red pepper seasoned with Parmesan cheese has been developed as a new type of product developed by family cottage industries. Two formulations were prepared, or rather, with and without the preservative potassium sorbate, which underwent several physical, chemical, microbiological and sensory analyses. Physical and chemical analyses were undertaken for acidity, pH and °Brix; microbiological analyses for total heat-tolerant coliforms, Salmonella sp, molds, yeasts; sensory aspects such as physical features, aroma, flavor and texture, coupled to purchase intention among tasters were investigated. Both formulations comprised physical, chemical and microbiological parameters within standards. Sensory evaluation showed satisfactory results and research on purchase intention showed approximately 80% acceptability. Results from physical, chemical and microbiological tests showed that pickled pepper seasoned with Parmesan cheese may be prepared with citric acid as a preservative. Sensory evaluation and purchase intention indicate a real production and sale possibility of pickled peppers seasoned with Parmesan cheese by family cottage industries.  

Aspectos sociotécnicos das TI & Relacionamento Humano & Sinergia

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Sergio Vieira Holtz Filho

2008-06-01

Full Text Available As Tecnologias de Informação (TI estão entre os principais agentes de mudança sociais. Para gerir tais mudanças, uma miríade de áreas do conhecimento humano têm muito a contribuir para a abordagem dos aspectos sociotécnicos das TI e promover sinergia. Como uma organização empresarial atua no sentido de provocar mudanças no comportamento das pessoas, visando a melhoria contínua, esse processo de mudança provocada chama-se aprendizagem. Isto posto, neste artigo apresentaremos resultados observados em empresas em processo de reengenharia e submetidas a utilização de metodologias integradas (PDCA, Método Paulo Freire e Roteiro Integração de Equipes, abordando os aspectos sociotécnicos das TI & relacionamentos humanos pela praxe da pedagogia como elemento de sinergia.

Chemometrics as a tool to analyse complex chemical mixtures

DEFF Research Database (Denmark)

Christensen, J. H.

Chemical characterisation of contaminant mixtures is important for environmental forensics and risk assessment. The great challenge in future research lies in develop- ing suitable, rapid, reliable and objective methods for analysis of the composition of complex chemical mixtures. This thesis...... describes the development of such methods for assessing the identity (chemical fingerprinting) and fate (e.g. biodegradation) of petroleum hydrocarbon mixtures. The methods comply with the general concept that suitable methods must be rapid and inexpensive, objective with limited human in- tervention...... and at the same time must consider a substantial fraction of compounds in the complex mixture. A combination of a) limited sample preparation, b) rapid chemical screening analysis, c) fast and semi-automatic pre-processing, d) compre- hensive multivariate statistical data analysis and e) objective data evaluation...

La gestión por procesos, su surgimiento y aspectos teóricos

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Daysi Ruiz - Fuentes

2013-01-01

Full Text Available Abordó aspectos históricos y teóricos relacionados con la gestión por procesos, se precisa las potencialidades de su aplicación para el perfeccionamiento de la dirección de las empresas. Presentó un análisis de diferentes definiciones de este término a partir del c ual se determinan las regularidades que lo caracterizan. Se puntualizan algunos aspectos teóricos vinculados con esta forma de gestión empresarial.

La gestión por procesos, su surgimiento y aspectos teóricos

OpenAIRE

Daysi Ruiz-Fuentes; Rosa Mercedes Almaguer-Torres; Isabel Cristina Torres-Torres; Alejandro Miguel Hernández-Peña

2014-01-01

Abordó aspectos históricos y teóricos relacionados con la gestión por procesos, se precisa las potencialidades de su aplicación para el perfeccionamiento de la dirección de las empresas. Presentó un análisis de diferentes definiciones de este término a partir del c ual se determinan las regularidades que lo caracterizan. Se puntualizan algunos aspectos teóricos vinculados con esta forma de gestión empresarial.

Occupational allergic contact dermatitis caused by sterile non-latex protective gloves: clinical investigation and chemical analyses.

Science.gov (United States)

Pontén, Ann; Hamnerius, Nils; Bruze, Magnus; Hansson, Christer; Persson, Christina; Svedman, Cecilia; Thörneby Andersson, Kirsten; Bergendorff, Ola

2013-02-01

An increased frequency of occupational contact hand dermatitis among surgical operating theatre personnel has been noticed. To evaluate patients with occupational contact dermatitis caused by their rubber gloves, and to describe a method for analysing the content of the allergens in the gloves. Patch tests were performed with the baseline series, a rubber chemical series, and the patients' own gloves. A method for analysing 1,3-diphenylguanidine (DPG) and cetylpyridinium chloride in the gloves was developed. Contact allergy to thiuram mix was found in 8 of 16 patients, whereas 12 of 16 patients reacted to DPG. In 7 of 8 patients, contact allergy to cetylpyridinium chloride was found. In the patients' gloves, cetylpyridinium chloride and DPG were detected at higher concentrations on the inside of the gloves than on the outside. Most patients had worked for decades in their present occupations, but their hand dermatitis had only been present for months. Contact allergy to DPG in gloves has been disputed, but, in this study, we were able to confirm the presence of DPG and cetylpyridinium chloride in the causative gloves by using a modified method for the analysis. The presence of these chemicals in gloves caused an increase in occupational contact dermatitis in surgical operating theatre personnel. © 2012 John Wiley & Sons A/S.

Long-term fertilization alters chemically-separated soil organic carbon pools: Based on stable C isotope analyses

Science.gov (United States)

Dou, Xiaolin; He, Ping; Cheng, Xiaoli; Zhou, Wei

2016-01-01

Quantification of dynamics of soil organic carbon (SOC) pools under the influence of long-term fertilization is essential for predicting carbon (C) sequestration. We combined soil chemical fractionation with stable C isotope analyses to investigate the C dynamics of the various SOC pools after 25 years of fertilization. Five types of soil samples (0-20, 20-40 cm) including the initial level (CK) and four fertilization treatments (inorganic nitrogen fertilizer, IN; balanced inorganic fertilizer, NPK; inorganic fertilizer plus farmyard manure, MNPK; inorganic fertilizer plus corn straw residue, SNPK) were separated into recalcitrant and labile fractions, and the fractions were analysed for C content, C:N ratios, δ13C values, soil C and N recalcitrance indexes (RIC and RIN). Chemical fractionation showed long-term MNPK fertilization strongly increased the SOC storage in both soil layers (0-20 cm = 1492.4 gC m2 and 20-40 cm = 1770.6 gC m2) because of enhanced recalcitrant C (RC) and labile C (LC). The 25 years of inorganic fertilizer treatment did not increase the SOC storage mainly because of the offsetting effects of enhanced RC and decreased LC, whereas no clear SOC increases under the SNPK fertilization resulted from the fast decay rates of soil C.

Aspectos nutricionales de la anorexia nerviosa

OpenAIRE

Delgado Santirso, Pablo

2017-01-01

El estudio que se presentará en las siguientes líneas pretende la actualización de los datos sobre los aspectos nutricionales de uno de los principales Trastornos de la Conducta Alimentaria (TCA), la Anorexia Nerviosa (AN), así como aportar información acerca de sus características generales, etiopatogenia, evaluación y diagnóstico y tratamiento. Se centrará fundamentalmente en las medidas higiénico-dietéticas necesarias del tratamiento nutricional y en el establecimiento de la función del di...

Estilo de vida materno e aspectos nutricionais do pré-escolar

OpenAIRE

Érica Bezerra Nobre

2016-01-01

INTRODUÇÃO: Muitos dos comportamentos de saúde envolvidos no aparecimento das doenças crônicas não comunicáveis são originados na infância sob influência dos pais. A mãe é a pessoa mais envolvida na educação e nos cuidados de saúde da criança. O estilo de vida (EdV) é um determinante social da saúde. Nunca se compreendeu características de EdV materno associadas com aspectos da nutrição infantil. OBJETIVO: Verificar a associação dos EdV materno comportamental e não comportamental com aspectos...

Aspectos prosódicos da fala de sujeitos parkinsonianos

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Lourenço Chacon

2001-02-01

Full Text Available

Problemas de prosódia na fala de parkinsonianos têm sido apontados nos estudos sobre parkinsonismo. Contudo, nesses estudos a prosódia é freqüentemente desvinculada dos fatores comunicativos da fala. O propósito deste artigo foi investigar fatores comunicativos relacionados a aspectos prosódicos da fala de sujeitos com doença de Parkinson. As amostras 'de fala foram extraídas de conversas espontâneas de dois sujeitos parkinsonianos, do sexo masculino. A análise mostrou que os elementos prosódicos ocorreram em diversas combinações, possibilitando a identificação de: a atos de fala; b alguns aspectos da organização conversacional; e c diferentes vozes no discurso. Foram destacadas algumas implicações desses resultados para uma melhor compreensão da atividade verbal em condições patológicas, bem como para avaliação, diagnóstico e terapia de parkinsonianos.

Metal and physico-chemical variations at a hydroelectric reservoir analyzed by Multivariate Analyses and Artificial Neural Networks: environmental management and policy/decision-making tools.

Science.gov (United States)

Cavalcante, Y L; Hauser-Davis, R A; Saraiva, A C F; Brandão, I L S; Oliveira, T F; Silveira, A M

2013-01-01

This paper compared and evaluated seasonal variations in physico-chemical parameters and metals at a hydroelectric power station reservoir by applying Multivariate Analyses and Artificial Neural Networks (ANN) statistical techniques. A Factor Analysis was used to reduce the number of variables: the first factor was composed of elements Ca, K, Mg and Na, and the second by Chemical Oxygen Demand. The ANN showed 100% correct classifications in training and validation samples. Physico-chemical analyses showed that water pH values were not statistically different between the dry and rainy seasons, while temperature, conductivity, alkalinity, ammonia and DO were higher in the dry period. TSS, hardness and COD, on the other hand, were higher during the rainy season. The statistical analyses showed that Ca, K, Mg and Na are directly connected to the Chemical Oxygen Demand, which indicates a possibility of their input into the reservoir system by domestic sewage and agricultural run-offs. These statistical applications, thus, are also relevant in cases of environmental management and policy decision-making processes, to identify which factors should be further studied and/or modified to recover degraded or contaminated water bodies. Copyright © 2012 Elsevier B.V. All rights reserved.

Aspectos ergonômicos e estatísticos no projeto de um carro do metrô

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Costa Neto Pedro Luiz de Oliveira

2002-01-01

Full Text Available Este artigo descreve experimentos realizados como parte de um trabalho envolvendo aspectos do projeto de um carro para uma nova linha do Metrô de São Paulo. Nele são considerados aspectos ergonômicos relacionados com a posição de barras de segurança e assentos, bem como aspectos estatísticos relacionados com o fluxo de passageiros entrando e saindo do carro na estação. Nesse estudo, é de particular interesse o uso da técnica do quadrado latino na análise de regressão múltipla, como forma de reduzir o porte do experimento.

Physico-chemical analyses and corrosion effect of produced water ...

African Journals Online (AJOL)

Physico-chemical characteristics of the composite produced water sample used for the study has a higher concentration compared with DPR standard for discharge of produced formation water into surface environment. It was assumed that the corrosion of the coupons was due to presence of high chemical matters in the ...

Preliminary analyses on hydrogen diffusion through small break of thermo-chemical IS process hydrogen plant

International Nuclear Information System (INIS)

Somolova, Marketa; Terada, Atsuhiko; Takegami, Hiroaki; Iwatsuki, Jin

2008-12-01

Japan Atomic Energy Agency has been conducting a conceptual design study of nuclear hydrogen demonstration plant, that is, a thermal-chemical IS process hydrogen plant coupled with the High temperature Engineering Test Reactor (HTTR-IS), which will be planed to produce a large amount of hydrogen up to 1000m 3 /h. As part of the conceptual design work of the HTTR-IS system, preliminary analyses on small break of a hydrogen pipeline in the IS process hydrogen plant was carried out as a first step of the safety analyses. This report presents analytical results of hydrogen diffusion behaviors predicted with a CFD code, in which a diffusion model focused on the turbulent Schmidt number was incorporated. By modifying diffusion model, especially a constant accompanying the turbulent Schmidt number in the diffusion term, analytical results was made agreed well with the experimental results. (author)

Aspectos Técnicos en la Producción de Caucho Hevea

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Uribe Henao Alfonso

1950-09-01

Full Text Available El propósito primordial de este trabajo es el de hacer una exposición de los principales factores o aspectos técnicos que deben tenerse en cuenta en el planeamiento y desarrollo del cultivo de la Hevea, para poder obtener de él en la forma más económica el máximo beneficio. Se ha dacio preferencia a los aspectos técnicos concernientes al Hevea de mayor importancia, sin pretender exponerlos todos. No es pues su objetivo dar a conocer todos aquellos detalles y sistemas aconsejables y necesarios en su explotación que pudieran considerarse como principios elementales, y que más bien vienen a ser prácticas corrientes del cultivo.

Aspectos ultra-estruturais da forma epimastigota do Trypanosoma cruzi em meio LIT

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Wanderley de Souza

1975-06-01

Full Text Available E feito um estudo da ultra-estrutura da forma epismastigota do Trypanosoma cruzi mantida em meio de cultivo acelular. O núcleo das formas em divisão apresenta um aspecto homogêneo. Microtúbulos intranucleares são observados durante a divisão. No entanto, a membrana nuclear permanece íntegra. O citoplasma apresenta-se com vacúolos de dimensões e aspectos variados. Com o método do ácido periódico-tiosemicarbazida-proteinato de prata, polissacaríáeos e/ou glicoproteínas foram localizados na membrana celular e na membrana que delimita certos vacúolos citoplasmáticos.

Aspectos de regulación sanitaria en Brasil

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Jose Carlos Buzanello

2016-06-01

Full Text Available Mira a algunos aspectos de la regulación de los servicios de saneamiento en Brasil, específicamente la política de regulación resultante del proceso de reforma del Estado de 1995. Cuestiona los resultados de la productividad de los servicios de agua y alcantarillado de los concesionarios y el alcance de estas medidas al consumismo usuario.

Aspectos éticos de la obesidad

OpenAIRE

de Santiago Martín, Sandra

2016-01-01

El sobrepeso y la obesidad se están convirtiendo en uno de los problemas de salud de mayor preocupación, convirtiéndose en los últimos años en una verdadera pandemia mundial. Los objetivos de esta revisión bibliográfica son analizar los aspectos éticos de la obesidad, desde el punto de vista de la familia y la sociedad, las buenas prácticas sanitarias, los principios bioéticos y de los derechos del paciente obeso. Para realizar este trabajo de investigación se accedieron a las bases de ...

Aspectos puntuales del estado vegetativo persistente

OpenAIRE

Hodelín Tablada, Ricardo

2013-01-01

El estado vegetativo persistente es una condición clínica caracterizada por la ausencia completa de conciencia sobre uno mismo y el entorno, unido a ciclos de sueño-vigilia, con preservación total o parcial de las funciones hipotalámicas y autonómicas del tallo encefálico. En el presente artículo, el autor discute aspectos puntuales sobre la entidad clínica, basado en su experiencia y en la revisión de la bibliografía sobre el tema; igualmente se exponen elementos clínicos y epidemiológicos d...

Correlation and regression analyses of genetic effects for different types of cells in mammals under radiation and chemical treatment

International Nuclear Information System (INIS)

Slutskaya, N.G.; Mosseh, I.B.

2006-01-01

Data about genetic mutations under radiation and chemical treatment for different types of cells have been analyzed with correlation and regression analyses. Linear correlation between different genetic effects in sex cells and somatic cells have found. The results may be extrapolated on sex cells of human and mammals. (authors)

Aspectos comportamentais na gestão de projetos: uma análise bibliométrica (1988-2014

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Diane Aparecida dos Reis Silva

Full Text Available Resumo A demanda por gerentes de projetos é crescente. Um dos principais fatores que impactam no desempenho desse profissional relaciona-se ao aspecto comportamental, ou seja, àquele em que as relações e o entendimento entre os indivíduos de um grupo são fundamentais. Ante essa problemática, o objetivo deste trabalho foi realizar uma análise bibliométrica sobre aspectos comportamentais na gestão de projetos, buscando identificar as relações entre aspectos comportamentais e o gerenciamento de projetos. Para tanto, utilizou-se a metodologia bibliométrica: as bases de dados que compõem a amostra foram coletadas em ISI Web of Science e Scopus, desde que os artigos da Scopus também estivessem na base principal da ISI Web of Science. As análises sugerem ou evidenciam que os aspectos comportamentais, o “lado humano”, se apresenta como fator essencial para o sucesso na gestão de projetos.

ASPECTOS ERGONÔMICOS E POSTURAIS EM CENTRO DE MATERIAL

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Neusa Maria Cosía Alexandre

Full Text Available Determinados fatores ambientais inadequados podem provocar lesões na coluna vertebral. Este trabalho discute certos aspectos ergonômicos e posturais específicos em Centro de Material com o objetivo de desenvolver uma consciência crítica a respeito dos efeitos do local de trabalho sobre a saúde.

Aspectos da tomografia computadorizada craniana na neurocisticercose na infância

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Marilisa M. Guerreiro

1989-06-01

Full Text Available Os autores relatam aspectos tomográficos da neurocisticercose na infância a propósito da análise de 27 exames em 18 pacientes, que foram distribuídos em três grupos segundo o quadru clínico e os achados tomográficos. O grupo 1 foi caracterizado basicamente por epilepsias e calcificações. O grupo 2 caracterizou-se por hipertensão intracraniana e diversos aspectos tomográficos: edema, cistos e nódulos em três pacientes; hidrocefalia e calcificações em dois pacientes e normal em um paciente. O grupo 3 consistiu clinicamente de epilepsia e cefaléia, com vários padrões tomográficos. Os resultados são discutidos à luz da literatura disponível.

Chemical analyses in the World Coal Quality Inventory

Science.gov (United States)

Tewalt, Susan J.; Belkin, Harvey E.; SanFilipo, John R.; Merrill, Matthew D.; Palmer, Curtis A.; Warwick, Peter D.; Karlsen, Alexander W.; Finkelman, Robert B.; Park, Andy J.

2010-01-01

The main objective of the World Coal Quality Inventory (WoCQI) was to collect and analyze a global set of samples of mined coal during a time period from about 1995 to 2006 (Finkelman and Lovern, 2001). Coal samples were collected by foreign collaborators and submitted to country specialists in the U.S. Geological Survey (USGS) Energy Program. However, samples from certain countries, such as Afghanistan, India, and Kyrgyzstan, were collected collaboratively in the field with USGS personnel. Samples were subsequently analyzed at two laboratories: the USGS Inorganic Geochemistry Laboratory located in Denver, CO and a commercial laboratory (Geochemical Testing, Inc.) located in Somerset, PA. Thus the dataset, which is in Excel (2003) format and includes 1,580 samples from 57 countries, does not have the inter-laboratory variability that is present in many compilations. Major-, minor-, and trace-element analyses from the USGS laboratory, calculated to a consistent analytical basis (dry, whole-coal) and presented with available sample identification information, are sorted alphabetically by country name. About 70 percent of the samples also have data from the commercial laboratory, which are presented on an as-received analytical basis. The USGS initiated a laboratory review of quality assurance in 2008, covering quality control and methodology used in inorganic chemical analyses of coal, coal power plant ash, water, and sediment samples. This quality control review found that data generated by the USGS Inorganic Geochemistry Laboratory from 1996 through 2006 were characterized by quality practices that did not meet USGS requirements commonly in use at the time. The most serious shortcomings were (1) the adjustment of raw sample data to standards when the instrument values for those standards exceeded acceptable limits or (2) the insufficient use of multiple standards to provide adequate quality assurance. In general, adjustment of raw data to account for instrument

Algunos aspectos éticos en la práctica de la obstetricia

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DR. P. Sergio Valenzuela

2014-11-01

Full Text Available La obstetricia ejercida en el contexto clínico asistencial es una fuente permanente de cuestionamientos éticos para los especialistas. En este artículo, que tiene carácter de ensayo, se aborda una primera parte introductoria, que da cuenta de la dimensión antropológica del cuidado obstétrico. Luego se destaca la necesidad de referirse a un número mayor de principios en la fundamentación del quehacer obstétrico. Por último, profundiza principalmente en los aspectos éticos de su ejercicio como obstetricia de urgencia y la ética del diagnóstico; quedando aspectos importantes para discutir en una futura oportunidad.

Biological Sampling and Analysis in Sinclair and Dyes Inlets, Washington: Chemical Analyses for 2007 Puget Sound Biota Study

Energy Technology Data Exchange (ETDEWEB)

Brandenberger, Jill M.; Suslick, Carolynn R.; Johnston, Robert K.

2008-10-09

Evaluating spatial and temporal trends in contaminant residues in Puget Sound fish and macroinvertebrates are the objectives of the Puget Sound Ambient Monitoring Program (PSAMP). In a cooperative effort between the ENVironmental inVESTment group (ENVVEST) and Washington State Department of Fish and Wildlife, additional biota samples were collected during the 2007 PSAMP biota survey and analyzed for chemical residues and stable isotopes of carbon (δ13C) and nitrogen (δ15N). Approximately three specimens of each species collected from Sinclair Inlet, Georgia Basin, and reference locations in Puget Sound were selected for whole body chemical analysis. The muscle tissue of specimens selected for chemical analyses were also analyzed for δ13C and δ15N to provide information on relative trophic level and food sources. This data report summarizes the chemical residues for the 2007 PSAMP fish and macro-invertebrate samples. In addition, six Spiny Dogfish (Squalus acanthias) samples were necropsied to evaluate chemical residue of various parts of the fish (digestive tract, liver, embryo, muscle tissue), as well as, a weight proportional whole body composite (WBWC). Whole organisms were homogenized and analyzed for silver, arsenic, cadmium, chromium, copper, nickel, lead, zinc, mercury, 19 polychlorinated biphenyl (PCB) congeners, PCB homologues, percent moisture, percent lipids, δ13C, and δ15N.

Planificación estratégica: aspectos introductorios (I)

OpenAIRE

Galindo Reyes, Fuensanta Carmen; De la Varga Salto, José María

2016-01-01

Transparencias como material docente para la asignatura de Administración de Organizaciones. Se corresponden con la etapa primera del proceso administrativo de las organizaciones, la planificación estratétiga. En concreto, incluyen aspectos introductorios relacionados con los conceptos y elementos principales de la planificación estratégica. Planificación estratégica

Combining hydraulic model, hydrogeomorphological observations and chemical analyses of surface waters to improve knowledge on karst flash floods genesis

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F. Raynaud

2015-06-01

Full Text Available During a flood event over a karst watershed, the connections between surface and ground waters appear to be complex ones. The karst may attenuate surface floods by absorbing water or contribute to the surface flood by direct contribution of karst waters in the rivers (perennial and overflowing springs and by diffuse resurgence along the hillslopes. If it is possible to monitor each known outlet of a karst system, the diffuse contribution is yet difficult to assess. Furthermore, all these connections vary over time according to several factors such as the water content of the soil and underground, the rainfall characteristics, the runoff pathways. Therefore, the contribution of each compartment is generally difficult to assess, and flood dynamics are not fully understood. To face these misunderstandings and difficulties, we analysed surface waters during six recent flood events in the Lirou watershed (a karst tributary of the Lez, in South of France. Because of the specific chemical signature of karst waters, chemical analyses can supply information about water pathways and flood dynamics. Then, we used the dilution law to combine chemical results, flow data and field observations to assess the dynamics of the karst component of the flood. To end, we discussed the surface or karst origin of the waters responsible for the apparent runoff coefficient rise during flash karst flood.

Aspectos sociales de la malaria importada en Latinoamérica

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Alfonso J. Rodríguez-Morales

2008-04-01

Full Text Available La malaria continúa siendo un grave problema de salud pública mundial, ya no sólo en países endémicos, sino comenzando a representar un dilema médico en países distantes por la llegada de casos importados. Ahora bien, aun cuando en términos de las disciplinas médicas convencionales se ha publicado muchos estudios clínico-epidemiológicos y reportes de caso, los aspectos sociales, que parecerían obvios en el contexto de la malaria importada por supeditarse a la migración de la población, no han sido exhaustivamente explorados en relación con este fenómeno. Por estas razones, en esta revisión se analiza los aspectos sociales relacionados con el fenómeno de la malaria importada con énfasis al contexto epidemiológico de América Latina.

Aspectos éticos en Pediatría, las inmunodeficiencias primarias

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Martha Leonor Paradoa Pérez

2012-12-01

Full Text Available Las inmunodeficiencias primarias son enfermedades genéticas, caracterizadas por infecciones crónicas devastadoras que conllevan a la muerte, al desarrollo de tumores y a enfermedades autoinmunes, y la mayoría de estas enfermedades cursan en la edad pediátrica. Desde la última década del pasado siglo, el desarrollo de la tecnología, el surgimiento del Proyecto del Genoma Humano y la profundización en los aspectos bioéticos, han dado lugar a especificidades en la atención médica e investigativa del paciente pediátrico y del que desarrolla una enfermedad inmunológica. Este trabajo recoge los aspectos bioéticos más importantes y los dilemas éticos con los que se enfrenta el inmunólogo pediátrico en la atención al paciente con inmunodeficiencia primaria, el cual demanda la atención de, prácticamente, todas las especialidades pediátricas.

Aspectos geopolíticos en el desarrollo de la zona franca industrial de Ilo

OpenAIRE

Cardenas Nuñez, Gilberto; Cardenas Nuñez, Gilberto

1994-01-01

El presente trabajo de Tesis enfatiza el aspecto geopolítico en el desarrollo de la Zona franca Industrial de Ilo (ZOFRI-IL0). La razón de tal énfasis es simple: por este aspecto específicamente es que se creó la ZOFRI-ILO. En consecuencia, el tratamiento del tema tiene que ver con la influencia geopolítica en las sucesivas etapas de su desarrollo, considerando sus posibilidades de desarrollo a futuro en el marco de las tendencias internacionales de la globalización de la economía mundial. ...

Landfill mining: Resource potential of Austrian landfills--Evaluation and quality assessment of recovered municipal solid waste by chemical analyses.

Science.gov (United States)

Wolfsberger, Tanja; Aldrian, Alexia; Sarc, Renato; Hermann, Robert; Höllen, Daniel; Budischowsky, Andreas; Zöscher, Andreas; Ragoßnig, Arne; Pomberger, Roland

2015-11-01

Since the need for raw materials in countries undergoing industrialisation (like China) is rising, the availability of metal and fossil fuel energy resources (like ores or coal) has changed in recent years. Landfill sites can contain considerable amounts of recyclables and energy-recoverable materials, therefore, landfill mining is an option for exploiting dumped secondary raw materials, saving primary sources. For the purposes of this article, two sanitary landfill sites have been chosen for obtaining actual data to determine the resource potential of Austrian landfills. To evaluate how pretreating waste before disposal affects the resource potential of landfills, the first landfill site has been selected because it has received untreated waste, whereas mechanically-biologically treated waste was dumped in the second. The scope of this investigation comprised: (1) waste characterisation by sorting analyses of recovered waste; and (2) chemical analyses of specific waste fractions for quality assessment regarding potential energy recovery by using it as solid recovered fuels. The content of eight heavy metals and the net calorific values were determined for the chemical characterisation tests. © The Author(s) 2015.

Aspectos “Subjetivos” do Fetichismo da Mercadoria Cultural no Ensaio Sobre Música Popular de T. W. Adorno

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Fábio César da Silva

2017-05-01

Full Text Available Neste artigo, apresento uma leitura do ensaio Sobre Música Popular (1941 de T. W. Adorno (1903-1969, enfatizando os aspectos “subjetivos” do fetichismo da mercadoria cultural. Considero aspectos “subjetivos” do fetichismo quando se enfatiza o consumo de mercadorias. Esse ensaio fez parte dos resultados de pesquisa de rádio da Universidade de Princeton, feita nos Estados Unidos entre 1938 a 1940, cujo objetivo era analisar as programações radiofônicas. Focarei a leitura na seção Teoria do Ouvinte, pois nela Adorno enfatizou esses aspectos “subjetivos” por meio de análises específicas do consumo da música popular americana supondo seus modos de recepção.

Los aspectos socioculturales de la migración en la frontera norte

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Oscar Priego Hernández

2011-12-01

Full Text Available México se considera el país de emigrantes más importante del mundo y Estados Unidos el principal país de inmigrantes. Su posición geográfica en la frontera Norte lo convierten atractivo para los flujos migratorios de los países centroamericanos. Hoy enfrenta los retos de la crisis financiera internacional de los últimos años que afecta las economías y las relaciones bilaterales. Este trabajo consiste en realizar un estudio de la problemática de los aspectos socioculturales provocada por la migración de personas, analizar fortalezas y debilidades, identificar los nuevos aspectos de la migración y proponer alternativas para mejorar las condiciones de vida de los migrantes mexicanos.

Toxicity testing and chemical analyses of recycled fibre-based paper for food contact

DEFF Research Database (Denmark)

Binderup, Mona-Lise; Pedersen, Gitte Alsing; Vinggaard, Anne

2002-01-01

of different qualities as food-contact materials and to Perform a preliminary evaluation of their suitability from a safety point of view, and, second, to evaluate the use of different in vitro toxicity tests for screening of paper and board. Paper produced from three different categories of recycled fibres (B...... of the paper products were extracted with either 99% ethanol or water. Potential migrants in the extracts were identified and semiquantified by GC-1R-MS or GC-HRMS. In parallel to the chemical analyses, a battery of four different in vitro toxicity tests with different endpoints were applied to the same...... was less cytotoxic than the extracts prepared from paper made from recycled fibres, and extracts prepared from C was the most cytotoxic. None of the extracts showed mutagenic activity No conclusion about the oestrogenic activity could be made, because all extracts were cytotoxic to the test organism (yeast...

Chemical analyses of wasp-associated streptomyces bacteria reveal a prolific potential for natural products discovery.

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Michael Poulsen

2011-02-01

Full Text Available Identifying new sources for small molecule discovery is necessary to help mitigate the continuous emergence of antibiotic-resistance in pathogenic microbes. Recent studies indicate that one potentially rich source of novel natural products is Actinobacterial symbionts associated with social and solitary Hymenoptera. Here we test this possibility by examining two species of solitary mud dauber wasps, Sceliphron caementarium and Chalybion californicum. We performed enrichment isolations from 33 wasps and obtained more than 200 isolates of Streptomyces Actinobacteria. Chemical analyses of 15 of these isolates identified 11 distinct and structurally diverse secondary metabolites, including a novel polyunsaturated and polyoxygenated macrocyclic lactam, which we name sceliphrolactam. By pairing the 15 Streptomyces strains against a collection of fungi and bacteria, we document their antifungal and antibacterial activity. The prevalence and anti-microbial properties of Actinobacteria associated with these two solitary wasp species suggest the potential role of these Streptomyces as antibiotic-producing symbionts, potentially helping defend their wasp hosts from pathogenic microbes. Finding phylogenetically diverse and chemically prolific Actinobacteria from solitary wasps suggests that insect-associated Actinobacteria can provide a valuable source of novel natural products of pharmaceutical interest.

Planificación estratégica: aspectos introductorios (II)

OpenAIRE

Galindo Reyes, Fuensanta Carmen; De la Varga Salto, José María

2016-01-01

Transparencias como material docente para la asignatura de Administración de Organizaciones. Se corresponden con la etapa primera del proceso administrativo de las organizaciones, la planificación estratégica. En concreto, incluyen aspectos introductorios relacionados con el análisis del entorno y el análisis interno, así como con el concepto y las características de los objetivos estratégicos.

Eugenia vinculada a aspectos bioéticos: uma revisão integrativa

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Vanessa Cruz Santos

Full Text Available O objetivo do estudo é analisar o que versam as produções científicas sobre eugenia, vinculando-as com aspectos bioéticos. Trata-se de uma revisão integrativa de literatura. Os dados foram coletados nas bases de dados Lilacs e SciELO, por meio dos descritores: eugenia, etnia e saúde, ética e bioética. Para a análise e posterior síntese dos artigos foi utilizada figura sinóptica. Verificou-se que a eugenia viola os direitos humanos, contradiz com o princípio da solidariedade e coloca em risco a diversidade humana. Conclui-se que houve déficit de artigos que abordem aspectos bioéticos vinculados à eugenia, assim, este estudo poderá contribuir para a reflexão sobre essa articulação.

Aspectos valorizados por porfissionais de enfermagem na higiene pessoal e na higiene corporal do paciente

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Elóide André Oliveira

2003-10-01

Full Text Available Survey descritivo, com o qual se objetivou identificar que aspectos da higiene corporal são valorizados pelos componentes da equipe de enfermagem, na higiene corporal pessoal e na higiene corporal do paciente. A pesquisa foi desenvolvida em oito instituições públicas de saúde e a amostra foi composta por 126 profissionais de enfermagem, correspondendo a 12,8% do total de 986 componentes das equipes de enfermagem destas instituições. Na higiene corporal pessoal, chamou a atenção o fato de que os cuidados com as unhas e com os cabelos tenham suplantado, no número de citações dos profissionais de enfermagem, aspectos básicos como o cuidado com as mãos. Na higiene corporal do paciente, o banho foi o aspecto considerado mais importante pelas três categorias profissionais; a higiene oral, pelas(os enfermeiras(os e auxiliares de enfermagem; e as unhas, pelas(os enfermeiras(os e técnicas(os de enfermagem.

Development of a fully automated open-column chemical-separation system—COLUMNSPIDER—and its application to Sr-Nd-Pb isotope analyses of igneous rock samples

Science.gov (United States)

Miyazaki, Takashi; Vaglarov, Bogdan Stefanov; Takei, Masakazu; Suzuki, Masahiro; Suzuki, Hiroaki; Ohsawa, Kouzou; Chang, Qing; Takahashi, Toshiro; Hirahara, Yuka; Hanyu, Takeshi; Kimura, Jun-Ichi; Tatsumi, Yoshiyuki

A fully automated open-column resin-bed chemical-separation system, named COLUMNSPIDER, has been developed. The system consists of a programmable micropipetting robot that dispenses chemical reagents and sample solutions into an open-column resin bed for elemental separation. After the initial set up of resin columns, chemical reagents, and beakers for the separated chemical components, all separation procedures are automated. As many as ten samples can be eluted in parallel in a single automated run. Many separation procedures, such as radiogenic isotope ratio analyses for Sr and Nd, involve the use of multiple column separations with different resin columns, chemical reagents, and beakers of various volumes. COLUMNSPIDER completes these separations using multiple runs. Programmable functions, including the positioning of the micropipetter, reagent volume, and elution time, enable flexible operation. Optimized movements for solution take-up and high-efficiency column flushing allow the system to perform as precisely as when carried out manually by a skilled operator. Procedural blanks, examined for COLUMNSPIDER separations of Sr, Nd, and Pb, are low and negligible. The measured Sr, Nd, and Pb isotope ratios for JB-2 and Nd isotope ratios for JB-3 and BCR-2 rock standards all fall within the ranges reported previously in high-accuracy analyses. COLUMNSPIDER is a versatile tool for the efficient elemental separation of igneous rock samples, a process that is both labor intensive and time consuming.

Poisoned Wine: Regulation, Chemical Analyses, and Spanish-French Trade in the 1930s.

Science.gov (United States)

Suay-Matallana, Ignacio; Guillem-Llobat, Ximo

2018-04-16

This paper describes the resources, scientific spaces, and experts involved in the study of a mass poisoning caused by the drinking of arsenic-contaminated wine exported from Spain to France in 1932. Local and international periodicals record the poisoning of 300 French sailors, and stressed the commercial implications of the case. We discuss the reports prepared by different experts (mainly physicians, agricultural engineers, and customs chemists). Their work was not limited to preparing technical publications or chemical analyses; they also actively defended the quality of their local wine, and played a major role in the discussions regarding the regulation of the international wine market in the 1930s, when new standards regarding the analysis of wine were being considered. Curiously, this well-publicised case of mass poisoning did not have any noticeable consequences in the international regulation of wine. This absence of subsequent regulatory action and the role of experts are central topics of the paper.

Aspectos bioéticos del consentimiento informado en investigación con población vulnerable

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Fabio Alberto Garzón Díaz

2009-01-01

Full Text Available El presente artículo es el resultado de 10 años de investigación en el tema del Consentimiento Informado en Investigación Biomédica. Este artículo presenta un análisis sistemático de los aspectos teóricos y prácticos del consentimiento informado en personas y poblaciones vulnerables. Aborda la cuestión a partir de todos los ángulos pertinentes, desde el histórico hasta el jurídico, pasando por la fundamentación filosófica, psicológica, antropológica y didáctica del consentimiento informado. La profundidad en el recorrido por los aspectos teóricos se ve complementada por la presentación de los aspectos más prácticos, que llega hasta la formulación de propuestas muy concretas para la mejora del consentimiento informado.

Aspectos biopsicossociais na surdocegueira Bio psycho social aspects in deaf blindness

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Susana Maria Mana de Aráoz

2008-04-01

Full Text Available O presente artigo tem por objetivo discutir aspectos biopssicossociais referentes a pessoas com surdocegueira e suas famílias com o objetivo trazer a tona estas questões que se tem mostrado importantes para o desenvolvimento dos atendimentos aos surdocegos. Está baseado em dados bibliográficos de pesquisas com pais e outras divulgações abordando as causas que são, principalmente, Rubéola Congênita, prematuridade, infecções, acidentes, síndromes genéticas ou não. Coloca as conseqüências das mesmas, o desenvolvimento educacional alcançado e as necessidades das famílias em aspectos ligadas às áreas da saúde, educação, lazer, segurança e inclusão social. Também trata da adaptação das famílias ao impacto produzido pela surdocegueira tendo em conta aspectos orgânicos, afetivo-relacional, sócio-culturais e de produtividade. Reflete sobre a necessidade da divulgação dos conhecimentos e da ação conjunta de todas as partes envolvidas nos mais diversos aspectos da vida dos surdocegos para conseguir o desenvolvimento dos atendimentos para os surdocegos.The objective of the present article is to discuss bio-psycho-social aspects related to people with deaf blindness and their families so as to highlight those issues that have become important for the development of working methods in deaf blindness. It is based on bibliographic data found in research with parents of deaf blind children and other publications that deal with the causes of the condition. The main causes are congenital German measles, prematurity, infection, genetic or non genetic syndromes. The authors discuss the results of the various presentations, the expected educational development and the needs of the families in aspects related to health, education, leisure, safety and social inclusion. They also discusses issues of family adaptation to the impact produced by deaf blindness, taking into account organic, social-cultural, affect and inter

Linguagem e aspectos visuo-espaciais : uma abordagem neurolinguistica

OpenAIRE

Carla Queiroz Pereira

2006-01-01

Resumo: O objetivo deste trabalho de pesquisa é investigar como o sujeito JS - não afásico após sofrer três acidentes vasculares cerebrais isquêmicos (AVCi?s) que lesionaram regiões parieto-occipitais de ambos os hemisférios cerebrais - realiza determinadas atividades lingüístico-cognitivas que envolvem aspectos vísuo-espaciais relacionados ao corpo, à escrita, à leitura de textos e de horas. Com base na Neurolingüística discursivamente orientada, na Neuropsicologia luriana e nas bases biológ...

Una plataforma multiagente para la búsqueda de recursos educacionales considerando aspectos culturales

Directory of Open Access Journals (Sweden)

Bender, Cristina

2006-01-01

Full Text Available En este trabajo se propone una arquitectura multiagente para la recuperación de recursos educacionales, que ayude a los usuarios a encontrar cursos que se adecuen a sus características personales y aspectos culturales. En este trabajo, se considera como aspectos culturales a las características que permiten distinguir las preferencias de estudiantes pertenecientes a distintas regiones geográficas. La plataforma multiagente planteada incluye varios tipos de agentes que tienen funcionalidades diferentes. En particular, se modela el Educational Resources Finder Agent como un agente BDI Graduado. Este agente se encarga de la recuperación de los mejores cursos de acuerdo al perfil de cada estudiante. Se describe el sistema multiagente completo y se presenta un ejemplo ilustrativo del proceso de búsqueda.

ASPECTOS AMBIENTALES EN LA EXPERIMENTACIÓN QUÍMICA PARA PREVENIR RIESGOS A LA SALUD Y AL AMBIENTE

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María O. Peña O.

2011-01-01

Full Text Available Un aspecto ambiental se considera como cualquier material o elemento físico o químico que el hombre arroja al agua, al aire y al suelo o que interactúe con el ambiente y propicie un riesgo para la salud y para el medio ambiente. Los residuos originados durante el desarrollo de actividades relacionadas con la experimentación química, aunque en una proporción menor que en un proceso industrial, ellos pueden ser residuos peligrosos al medio ambiente. Los aspectos ambientales se asocian con las actividades de generación de residuos, derrames, emisión a la atmósfera, el consumo de recursos naturales y ruido. Este estudio tuvo como objetivo proponer directrices para identificar y clasificar a los residuos que son generados en una experimentación química e introducir aspectos de seguridad para la salud y para el medio ambiente dentro de los procedimientos analíticos. Se inició con una evaluación diagnóstica sobre el conocimiento de la normativa en materia de gestión de los residuos o desechos, dirigida a técnicos y profesores que realizan actividades en ocho laboratorios para la enseñanza de la Química. Se siguió con la selección de un procedimiento analítico, como caso estudio, para revisar y aplicar estrategias de reusar, reciclar y reducir la generación de los residuos. Se encontró un desconocimiento de la normativa ambiental, representada por el 73% de los encuestados y un escaso tratamiento de residuos. Se concluye que la extensión de aspectos ambientales en los procedimientos analíticos puede ayudar a prevenir la contaminación ambiental, a fortalecer aspectos toxicológicos, de seguridad y de prevención de riesgos laborales.

LABORATORIO DE HORMONAS: ASPECTOS PRÁCTICOS

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René E. Díaz T., DR.

2015-11-01

Full Text Available Las técnicas de laboratorio de análisis hormonales han experimentado grandes progresos en las últimas décadas, actualmente se pueden realizar determinaciones hormonales con gran precisión y automatización, sin embargo, existen muchos elementos que es necesario tener en consideración al momento de interpretar un examen hormonal. El elegir el examen adecuado para la condición que estamos estudiando, el conocer sus limitaciones y potenciales falsos positivos y negativos es parte del conocimiento que es fundamental tener como clínicos. En este artículo se pretende entregar una breve revisión de las principales determinaciones hormonales, orientado a aspectos que puedan ser de utilidad al médico no especialista en su práctica clínica.

Aspectos podológicos en la Encuesta Nacional de Salud

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Antonio Martínez Sabater

Full Text Available Objetivo: la Encuesta Nacional de Salud (ENS es el instrumento para detectar el nivel de salud de la población, por lo que se plantea como objetivo el análisis de las diferentes ediciones para valorar la presencia de los aspectos podológicos y de la figura del profesional de podología en la atención a las personas mayores. Metodología: se ha realizado un análisis de contenido de las diferentes ENS tras la recopilación de las diferentes ediciones (8. Después de la lectura en profundidad y análisis por parte de dos investigadores, se han cumplimentado las fichas de análisis y se han categorizado los diferentes transcriptores, y se ha realizado el análisis e interpretación de la información encontrada. Resultados: en las diferentes ediciones no aparece ninguna mención a la profesión de podología; sí que aparecen referencias a otras figuras como naturópatas, quiroprácticos, entre otros. En relación con los descriptores sobre las afecciones de los pies, solo aparece una referencia en la edición de 1987. No obstante, la referencia a aspectos podológicos es prácticamente inexistente. Conclusiones: la ENS es el instrumento básico para conocer el estado de salud de la población general, pero presenta limitaciones al omitir los aspectos podológicos que suponen una merma en el diagnóstico de las necesidades y, por consiguiente, en la calidad de vida de las personas, principalmente mayores. Al igual que ocurre con la cartera de servicios del SNS, obvia a los/as profesionales formados para la atención básica de los problemas podológicos en el equipo de salud.

Aspectos psicossociais da homofobia intrafamiliar e saúde de jovens lésbicas e gays

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Juliana Perucchi

2014-03-01

Full Text Available O número de pesquisas sobre diferentes aspectos da homofobia cresceu nos últimos dez anos. Entretanto, há uma carência de estudos que analisem os aspectos psicossociais que envolvem as experiências de jovens lésbicas e gays mediante situações de violência e os desdobramentos destas na sua saúde. O presente artigo busca relatar os resultados de uma pesquisa que objetivou analisar como se constituem as situações de homofobia no âmbito das relações familiares vividas por jovens lésbicas e gays, analisando os aspectos psicossociais dos processos de ruptura ou afastamento temporário ou permanente do vínculo familiar. A hipótese confirmada ao longo desses anos de pesquisa é de que o preconceito se articula no contexto familiar como dispositivo de legitimação da violência e, consequentemente, ocasiona a ruptura do vínculo, o afastamento temporário ou permanente entre jovens lésbicas e gays e seus familiares, levando, muitas vezes, à saída ou à expulsão da casa dos pais em circunstâncias complexas e, frequentemente, dolorosas.

El maltrato infantil: aspectos psicológicos y programas de tratamientos

OpenAIRE

González Díaz, Adriana

2013-01-01

La presente revisión recoge los aspectos psicológicos derivados del maltrato infantil. Expone la tipología, así la evaluación psicológica de los menores en estos casos y las patologías asociadas al maltrato. Finalmente se exponen los principales programas de intervención y tratamiento en estos casos

La obesidad: aspectos psicológicos y conductuales

OpenAIRE

Bersh, Sonia

2006-01-01

Introducción: La obesidad es un problema médico de creciente gravedad por su morbilidad y su alta y creciente prevalencia. Objetivo: Realizar una revisión actualizada acerca de la obesidad y su tratamiento, con énfasis en los aspectos de mayor interés para la práctica psiquiátrica. Resultados: La obesidad es una enfermedad crónica de difícil manejo y alta tasa de recurrencia, que se asocia con complicaciones médicas graves. Los factores psicológicos y conductuales son muy relevantes en el cur...

ALGUNOS ASPECTOS A CONSIDERAR SOBRE LA SEXUALIDAD DEL ADULTO MAYOR

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Zoila Edith Hernández Zamora

2008-12-01

Full Text Available La presente investigación expone, a partir de una serie de entrevistas realizadas a una muestra de adultos mayores, aspectos relativos a la satisfacción general en la vida, así como las actitudes, conocimientos y prácticas de la sexualidad de un grupo de adultos mayores que asisten regularmente a una estancia diurna de la ciudad de Xalapa, Veracruz, México, misma que fue diseñada especialmente para este grupo etario. Se encontraron diferencias estadísticamente significativas entre la actitud hacia el ejercicio de la sexualidad de las personas mayores entre los hombres y las mujeres de la muestra, y entre .las personas que tienen pareja con relación a las que no tienen; así como que hay una diferencia estadísticamente significativa entre aquellas personas que tiene una o ninguna enfermedad y las que tienen dos o más enfermedades con respecto a su frecuencia de actividad sexual. Es de resaltar la escasez de conocimientos sobre aspectos básicos de la sexualidad que poseen estas personas mayores, lo que hace necesario el establecimiento de programas educativos que incluyan al personal de salud y a los mismos senectos.

ASPECTOS BASICOS DEL DERECHO ADUANERO PARA ESTUDIANTES DE PREGRADO

OpenAIRE

Castro Rangel, Jesus David; Garcia Vargas, Kristhell; Sepulveda Mora, Myriam

2008-01-01

La presente investigación comprende un estudio en un grado fundamental y a nivel general del Derecho Aduanero y una herramienta pedagógica dirigida a facilitar, a los alumnos de Pregrado de la Universidad Libre de Cúcuta, el entendimiento y aprendizaje de los aspectos básicos del Derecho Aduanero, teniendo en cuenta que Cúcuta es una zona fronteriza. El estudiante a través del presente trabajo encontrará las herramientas que le permitirán ubicarse dentro del contexto aduanero y...

Physico-chemical, mineralogical and chemical considerations in ...

African Journals Online (AJOL)

... pH (5.17 – 6.90) and EC (16.53 – 149.20ìS/cm). Values from physico-chemical analyses, secondary minerals abundance index (SMAI) and chemical index of alteration (CIA) of the soils were reflective of particles with high potential for sliding. With major contributions from favourable slope, seismic and hydrologic forces, ...

Aspectos moleculares da anemia falciforme

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Galiza Neto Gentil Claudino de

2003-01-01

Full Text Available No presente artigo abordaram-se vários aspectos relacionados à natureza molecular da anemia falciforme, desordem hematológica de caráter hereditário que acomete expressivo número de indivíduos em várias regiões do mundo. As pesquisas realizadas em torno desta patologia da hemácia, ao longo de quase um século, a partir de 1910, cooperaram para a criação de um novo e importante segmento da ciência, denominado biologia molecular. A descoberta dos polimorfismos da mutação (GAT->GTG no gene que codifica a cadeia beta da hemoglobina, originando diferentes haplótipos da doença, permitiu um melhor e mais amplo conhecimento em torno da heterogeneidade clínica nos pacientes falcêmicos. Analisando a hemoglobina na sua estrutura normal e mutante, sua produção e evolução, pode-se ter um entendimento mais completo da fisiopatologia desta doença e da sua complexidade clínica.

Aspectos Comportamentais no Julgamento Profissional dos Auditores Independentes

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José Emerson Firmino

2013-12-01

Full Text Available Alguns estudos evidenciam que a adoção das International Financial Reporting Standards (IFRS proporcionou melhorias na qualidade das informações contábeis. Mas, o conjunto de Procedimentos descritos nas IFRSs é fortemente afetado pelo julgamento profissional dos contadores. O mesmo fato ocorre com o auditor, que deve avaliar se a aplicação das normas resulta em fair presentation. Esse julgamento dependerá da interpretação do auditor sobre o nível de probabilidade associada a determinadas expressões presentes no texto das normas contábeis. Alguns autores evidenciam que existem diferenças significativas na interpretação das expressões verbais de probabilidade entre os auditores e que aspectos comportamentais estão influenciando a emissão do parecer de auditoria. Diante desse cenário, o objetivo deste estudo foi investigar como se comportam os auditores no julgamento de situações subjetivas, inseridos em um cenário pessimista ou otimista, no momento da avaliação dos critérios de reconhecimento e/ou mensuração, quando da execução dos trabalhos da auditoria. A amostra desta pesquisa é composta por 258 auditores independentes com registro de responsáveis técnicos junto à Comissão de Valores Mobiliários (CVM. Os resultados obtidos, por intermédio da análise das respostas dos auditores para situações subjetivas, sugerem que o julgamento do auditor em situações de subjetividade é influenciado por aspectos comportamentais, sendo que eles podem apresentar opiniões distintas em seus relatórios.

Aspectos motivacionais e afetivos na mediação de professores alfabetizadores

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Azevedo, Cleomar

2010-01-01

Full Text Available Este artigo é o resultado de uma pesquisa que parte da seguinte questão: o que diferencia o professor que obtém sucesso no processo de alfabetização? Levanto a hipótese que na mediação os aspectos motivacionais e afetivos são componentes que se fazem presente na atuação desses professores alfabetizadores. O objetivo desta pesquisa foi o de levantar os aspectos motivacionais e afetivos na mediação do processo de alfabetização, através da fala de professores alfabetizadores. Foram entrevistados 18 professores com a premissa de serem bons alfabetizadores. Investigar o que mobiliza e caracteriza a ação dos docentes, que mesmo possuindo inúmeras variáveis que interfiram negativamente nesse processo, conseguem obter êxito no desenvolvimento da alfabetização de seus alunos é uma possibilidade de levantar questões voltadas à problemática da aprendizagem do processo de alfabetização

Satisfacción con el aspecto dental general y tratamientos deseados en estudiantes universitarios

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Clarisse Virginia Díaz Reissner

2015-08-01

Full Text Available La apariencia dental es considerada un componente de la belleza facial, que al ser restaurada por el odontólogo, podría influir con un efecto positivo en la valoración personal y la calidad de vida. El objetivo del estudio fue determinar la satisfacción general con la apariencia dental en estudiantes de las carreras de Artes Visuales y Diseño de Indumentaria del Instituto Superior de Arte de la Facultad de Arquitectura Diseño y Arte de la Universidad Nacional de Asunción, matriculados en el 2014. Se aplicó un cuestionario que contenía preguntas sobre datos demográficos, satisfacción con el aspecto dental general y con diversos aspectos dentales, así como también sobre el tratamiento estético deseado. La muestra quedó conformada por 108 estudiantes, que corresponde al 49,1% de la población. Se observó que el 48,2% se encontraba insatisfecho con el aspecto general de sus dientes, siendo los tratamientos de elección: blanqueamiento (63,9% y ortodoncia (47,2%. Los factores predisponentes a la insatisfacción fueron residir en Gran Asunción e interior del país y percibir sus dientes como desalineados. Por otro lado, favoreció la satisfacción el haberse sentirse a gusto con el color de sus dientes.

Chemical and geotechnical analyses of soil samples from Olkiluoto for studies on sorption in soils

International Nuclear Information System (INIS)

Lusa, M.; Aemmaelae, K.; Hakanen, M.; Lehto, J.; Lahdenperae, A.-M.

2009-05-01

The safety assessment of disposal of spent nuclear fuel will include an estimate on the behavior of nuclear waste nuclides in the biosphere. As a part of this estimate also the transfer of nuclear waste nuclides in the soil and sediments is to be considered. In this study soil samples were collected from three excavator pits in Olkiluoto and the geotechnical and chemical characteristics of the samples were determined. In later stage these results will be used in sorption tests. Aim of these tests is to determine the Kd-values for Cs, Tc and I and later for Mo, Nb and Cl. Results of these sorption tests will be reported later. The geotechnical characteristics studied included dry weight and organic matter content as well as grain size distribution and mineralogy analyses. Selective extractions were carried out to study the sorption of cations into different mineral types. The extractions included five steps in which the cations bound to exchangeable, carbonate, oxides of Fe and Mn, organic matter and residual fractions were determined. For all fractions ICPMS analyses were carried out. In these analyses Li, Na, Mg, K, Ca, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Sr, Mo, Cd, Cs and Pb were determined. In addition six profiles were taken from the surroundings of two excavator pits for the 137 Cs determination. Besides the samples taken for the characterization of soil, supplement samples were taken from the same layers for the separation of soil water. From the soil water pH, DOC, anions (F, Cl, NO 3 , SO 4 ) and cations (Na, Mg, K, Ca, Al, Cr, Mn, Fe, Ni, Cu, Zn, As, S, Cd, Cs, Pb, U) were determined. (orig.)

Atitudes frente a aspectos relevantes da prática médica: estudo transversal randomizado com alunos de segundo e sexto anos

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Adriana Rainha Mascia

Full Text Available Estudo transversal com duas amostras randomizadas de 50 alunos do segundo e 50 do sexto ano de graduação em Medicina. Foi aplicado um questionário com questões abertas e a escala "Instrumento de avaliação de atitudes de estudantes de medicina frente a aspectos relevantes da prática médica" (Colares, 2002. A escala contém 52 questões referentes à: 1. Aspectos psicológicos e emocionais nas doenças orgânicas e mentais; 2. Manejo de situações relacionadas à morte; 3. Atenção primária à saúde; 4. Aspectos relacionados à doença mental; 5. Contribuição do médico ao avanço científico da medicina; 6. Outros aspectos relacionados à atuação médica e às políticas de saúde. As atitudes são categorizadas em positivas, negativas e conflitantes. Observou-se que os estudantes apresentaram atitudes positivas frente a pelo menos três dos seis aspectos abordados; os alunos do segundo ano e do sexto ano apresentaram diferença estatisticamente significativa (chi² = 6,901, g.l. = 1, p < 0,05 nas atitudes relacionadas ao fator 2 (manejo de situações relacionadas à morte.

Comparative physical-chemical characterization of encapsulated lipid-based isotretinoin products assessed by particle size distribution and thermal behavior analyses

Energy Technology Data Exchange (ETDEWEB)

Guimaraes, Carla Aiolfi, E-mail: carlaaiolfi@usp.br [Department of Pharmacy, Faculty of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo, SP 05508-000 (Brazil); Menaa, Farid [Department of Dermatology, School of Medicine Wuerzburg, Wuerzburg 97080 (Germany); Fluorotronics, Inc., 1425 Russ Bvld, San Diego Technology Incubator, San Diego, CA 92101 (United States); Menaa, Bouzid, E-mail: bouzid.menaa@gmail.com [Fluorotronics, Inc., 1425 Russ Bvld, San Diego Technology Incubator, San Diego, CA 92101 (United States); Quenca-Guillen, Joyce S. [Department of Pharmacy, Faculty of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo, SP 05508-000 (Brazil); Matos, Jivaldo do Rosario [Department of Fundamental Chemistry, Institute of Chemistry, University of Sao Paulo, Sao Paulo, SP 05508-000 (Brazil); Mercuri, Lucildes Pita [Department of Exact and Earth Sciences, Federal University of Sao Paulo, Diadema, SP 09972-270 (Brazil); Braz, Andre Borges [Department of Engineering of Mines and Oil, Polytechnical School, University of Sao Paulo, SP 05508-900 (Brazil); Rossetti, Fabia Cristina [Department of Pharmaceutical Sciences, Faculty of Pharmaceutical Sciences of Ribeirao Preto, University of Sao Paulo, Ribeirao Preto, SP 14015-120 (Brazil); Kedor-Hackmann, Erika Rosa Maria; Santoro, Maria Ines Rocha Miritello [Department of Pharmacy, Faculty of Pharmaceutical Sciences, University of Sao Paulo, Sao Paulo, SP 05508-000 (Brazil)

2010-06-10

Isotretinoin is the drug of choice for the management of severe recalcitrant nodular acne. Nevertheless, some of its physical-chemical properties are still poorly known. Hence, the aim of our study consisted to comparatively evaluate the particle size distribution (PSD) and characterize the thermal behavior of the three encapsulated isotretinoin products in oil suspension (one reference and two generics) commercialized in Brazil. Here, we show that the PSD, estimated by laser diffraction and by polarized light microscopy, differed between the generics and the reference product. However, the thermal behavior of the three products, determined by thermogravimetry (TGA), differential thermal (DTA) analyses and differential scanning calorimetry (DSC), displayed no significant changes and were more thermostable than the isotretinoin standard used as internal control. Thus, our study suggests that PSD analyses in isotretinoin lipid-based formulations should be routinely performed in order to improve their quality and bioavailability.

Direito a moradia e inclusão social: aspectos positivos e negativos do "programa minha casa minha vida"

OpenAIRE

Desordi, Jordana Laís; Strücker, Bianca

2016-01-01

O presente artigo pretende analisar aspectos conceituais e doutrinários referentes ao direito à moradia e à inclusão social, fazendo referência aos aspectos positivos e negativos do programa habitacional brasileiro “Minha Casa Minha Vida” (PMCMV). A pesquisa dá ênfase ao PMCMV, momento em que é analisada a legislação que cria e institui o Programa em suas duas versões existentes até este momento. Destaca-se, ainda, os reflexos que o programa causou ao proporcionar o acesso do indivíduo a sua ...

A import??ncia dos aspectos psicomotores na educa????o infantil

OpenAIRE

Silva, ??talo Cardoso Barreto da

2016-01-01

Introdu????o: Os aspectos psicomotores proporcionam atribui????es significativas para o desenvolvimento do aluno e pode ainda contribuir para sua evolu????o cognitiva, o tornando h??bil para realiza????o de diferentes movimentos. A educa????o f??sica escolar tem o poder de criar, estimular uma ampla gama de a????es motoras, novas viv??ncias que iriam estimular e desenvolver as crian??as. Criando tamb??m a capacidade de inclus??o, diversidade, respeito entre elas e quem as cerca. Objetivo: O p...

Tillandsia recurvata L. (Bromeliaceae: aspectos farmacognósticos

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Alex Lucena de Vasconcelos

2013-01-01

Full Text Available A cobertura superior das florestas tropicais, formada pelas copas das árvores, constitui um ambiente de extrema diversidade vegetal. Contribuindo com a grande riqueza dessas florestas encontram-se as espécies botânicas epífitas, cuja importância pode ser observada do ponto de vista ecológico, faunístico, etnobotânico e até mesmo farmacológico. Dentre as espécies adaptadas à vida epifítica podemos citar as bromeliáceas, que compõem uma das famílias mais representativas dessa flora com elevada variabilidade genética. Tillandsia recurvata é uma espécie epífita cosmopolita, nativa, adaptada a habitats áridos, utilizada para o tratamento de diversas doenças, mas pouco se tem publicado a respeito das comprovações científicas de suas propriedades. O presente trabalho revisa os aspectos etnofarmacológicos, atividades biológicas e compostos químicos relacionados à espécie em questão, pertencente à Bromeliaceae. A partir do levantamento de dados realizado, observa-se que esta se trata de uma espécie de conhecido uso popular no tratamento de diferentes distúrbios, com alguns estudos farmacológicos que comprovam suas propriedades terapêuticas. Do ponto de vista químico observa-se a presença de terpenos, flavonoides e derivados cinâmicos em sua constituição, em que alguns compostos isolados ilustram a potencialidade desta espécie como fonte de biomoléculas de interesse. Todos estes aspectos considerados nesta revisão contribuem para o conhecimento a respeito da importância biológica e o potencial terapêutico acerca dos metabólitos desta promissora espécie.

Biomonitoring in a clean and a multi-contaminated estuary based on biomarkers and chemical analyses in the endobenthic worm Nereis diversicolor

Energy Technology Data Exchange (ETDEWEB)

Durou, Cyril [CNRS, Universite de Nantes, Pole Mer et Littoral, SMAB, 2 rue de la Houssiniere, BP 92208, F-44322 Nantes Cedex 3 (France) and Institut de Biologie et Ecologie Appliquees, CEREA, Universite Catholique de l' Ouest, 44 rue Rabelais, 49008 Angers Cedex 01 (France)]. E-mail: cyril.durou@uco.fr; Poirier, Laurence [CNRS, Universite de Nantes, Pole Mer et Littoral, SMAB, 2 rue de la Houssiniere, BP 92208, F-44322 Nantes Cedex 3 (France); Amiard, Jean-Claude [CNRS, Universite de Nantes, Pole Mer et Littoral, SMAB, 2 rue de la Houssiniere, BP 92208, F-44322 Nantes Cedex 3 (France); Budzinski, Helene [CNRS UMR 5472, LPTC, Universite de Bordeaux I, 33405 Talence (France); Gnassia-Barelli, Mauricette [UMR INRA UNSA 1112 ROSE, Faculte des Sciences, BP 71, 06108 Nice Cedex 2 (France); Lemenach, Karyn [CNRS UMR 5472, LPTC, Universite de Bordeaux I, 33405 Talence (France); Peluhet, Laurent [CNRS UMR 5472, LPTC, Universite de Bordeaux I, 33405 Talence (France); Mouneyrac, Catherine [CNRS, Universite de Nantes, Pole Mer et Littoral, SMAB, 2 rue de la Houssiniere, BP 92208, F-44322 Nantes Cedex 3 (France); Institut de Biologie et Ecologie Appliquees, CEREA, Universite Catholique de l' Ouest, 44 rue Rabelais, 49008 Angers Cedex 01 (France); Romeo, Michele [UMR INRA UNSA 1112 ROSE, Faculte des Sciences, BP 71, 06108 Nice Cedex 2 (France); Amiard-Triquet, Claude [CNRS, Universite de Nantes, Pole Mer et Littoral, SMAB, 2 rue de la Houssiniere, BP 92208, F-44322 Nantes Cedex 3 (France)

2007-07-15

Relationships between biochemical and physiological biomarkers (acetylcholinesterase [AChE], catalase, and glutathione S-transferase [GST] activities, thiobarbituric acid reactive substances, glycogen, lipids and proteins) and accumulated concentrations of contaminants (polychlorinated biphenyls [PCBs], polycyclic aromatic hydrocarbons and metals) were examined in the keystone species Nereis diversicolor. The chemical analyses of worms and sediments allowed the designation of the Seine estuary and the Authie estuary as a polluted and relatively clean site respectively. Worms from the Seine estuary exhibited higher GST and lower AChE activities. Generally, larger worms had higher concentrations of energy reserves. Principal component analyses clearly highlighted intersite differences: in the first plan, GST activities and chemical concentrations were inversely related to concentrations of energy reserves; in the second one, PCB concentrations and AChE activity were inversely related. Depleted levels of energy reserves could be a consequence of combating toxicants and might predict effects at higher levels of biological organization. The use of GST and AChE activities and energy reserve concentrations as biomarkers is validated in the field in this keystone species. - The use of N. diversicolor as a biomonitor of environmental quality via the measurement of biomarkers and accumulated concentrations of contaminants is validated in the field.

Jeroky Mbaekua - aspectos da etnoarte indígena.

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Oseias de Oliveira

2015-06-01

Full Text Available A idéia de arte compartilhada na cultura ocidental tradicionalmente tem sido entendida a partir de elementos conceituais e categorizações que não podem ser aplicados na cultura indígena. Assim, considerar a arte indígena significa observar sua complexidade, de forma a perpassar todas as instâncias da vida desses sujeitos. Desta forma, o texto busca discutir aspectos da etnoarte indígena que não é focada em uma noção de arte centralizada e homogeneizadora mas, sim atenta à uma perspectiva que busca contemplar melhor o seu modo de construção de símbolos, significados e representações culturais.

Tabaco y salud infantil: un aspecto no suficientemente valorado

OpenAIRE

Rubio, Ivonne; Kanopa, Virginia

2015-01-01

La campaña que se desarrolla en Uruguay contra el consumo de tabaco enfatiza sobre los efectos nocivos que produce el cigarrillo en la salud de la población adulta que fuma y en fumadores pasivos. La disminución de afecciones cardiovasculares como el infarto de miocardio y del cáncer de pulmón ha mostrado resultados alentadores en relación a la disminución del número de consumidores, si bien aún no se ha logrado el descenso esperado. La campaña enfoca varios aspectos dirigidos a la presentaci...

Calidad de servicio (QoS en procesos: Escenarios de procesamiento con aspectos

Directory of Open Access Journals (Sweden)

Hector Manuel Soto Pérez

2016-12-01

En resumen el presente trabajo estudia conceptos básicos de calidad de servicio y algunos de sus marcos de aplicación siguiendo un enfoque aspectual. Planteando posibles casos de uso genéricos para aplicar mejoras en la prestación de la QoS mediante aspectos en la planificación y gestión de recursos de aplicaciones tradicionales.

Sobressalto patológico: aspectos clínicos e eletrencefalográficos

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Frederico Dahne Kliemann

1967-06-01

Full Text Available Os autores relatam o caso de um paciente apresentando crises de sobressalto provocadas por estímulos auditivos, sensitivos e visuais, sem crises epilépticas espontâneas nem retardo psicomotor. Estudam os aspectos clínicos e eletrencefalográficos e revisam a situação da entidade entre as assim chamadas epilepsias reflexas.

ANÁLISIS DE LA TRAZABILIDAD DESDE LA PERSPECTIVA DE LA ORIENTACIÓN A ASPECTOS

Directory of Open Access Journals (Sweden)

Marta Silvia Tabares

Full Text Available En este artículo se presenta un análisis acerca de la trazabilidad de los intereses de un sistema de software, desde el enfoque del desarrollo de software orientado a aspectos. Para esto se abordarán los conceptos generales de trazabilidad, de la orientación a aspectos y de las características que esta técnica puede proveer para verificar la fiabilidad y evolución de los requisitos en el proceso de desarrollo de software. Tratar la trazabilidad desde este enfoque pretende orientar al desarrollador a identificar elementos generales para determinar la traza de los intereses de corte transversal cuando estos afectan otros intereses del sistema y a su vez cómo diferentes piezas de un artefacto de software asociadas a este tipo de intereses han evolucionado y afectado a otras a lo largo del ciclo de vida de desarrollo.

Prótesis dental en el paciente anciano: aspectos relevantes

OpenAIRE

Almeida, Erika Oliveira de; Silva, Eulália Maria Martins da; Falcón Antenucci, Rosse Mary; Freitas Junior, Amílcar Chagas

2014-01-01

Para el paciente anciano la prótesis dental es una integradora familiar, social, mantenedora de la salud general y elevadora de la expectativa de vida. Algunos cambios fisiológicos, patológicos y funcionales que ocurren con los elementos dentales en la tercera edad pueden repercutir en el tratamiento protésico. La siguiente revisión de literatura destaca los aspectos  fundamentales que deben ser considerados en el tratamiento protésico de pacientes ancianos. Se destacan las particularidades d...

Refractarios: un aspecto clave en la industria del cemento

Directory of Open Access Journals (Sweden)

Castillo Neira, Percy

1985-09-01

Full Text Available To sit in judgement values of the technic level reached in a cement plant, it is surprisingly objetive to analyse work, planning and control development about Refractories subject. Considering and recognizing the validity of this pragmatic axiom it will offer unexpected improvement perspectives of the productivity rates and production records. This work pretends to be a contribution for this purpose, bringing some theoretic and practical accounts about de conditions offered by the Kiln-Exchanger-Cooler most diffused system, analyzing the characteristics that refractory material must have, in accordance with each zone, and finally, including some appraisals and recommendations regarding some of the manifold aspects which belongs to one of the most interesting ad complex fields of cement industry.

Para establecer un juicio de valor respecto al nivel técnico alcanzado en una planta cementera resulta sorprendentemente objetivo analizar el trabajo, planificación y control que se desarrolla alrededor del tema de Refractarios. Considerarlo y reconocer la validez de este axioma pragmático ofrecerá inusitadas perspectivas de superación de índices de productividad y récords de producción. En este trabajo se pretende un aporte a tal objetivo proporcionando algunas consideraciones teórico-prácticas sobre las condiciones que se presentan en el sistema Horno Intercambiador-Enfriador, más difundido, analizando las características que debe reunir el material refractario para cada zona y, finalmente, incluyendo algunas apreciaciones y recomendaciones principalmente de criterio, respecto a algunos de los múltiples aspectos que forman parte de uno de los campos más interesantes y complejos de la industria del cemento.

Evaluation of Pre- and Post- Redevelopment Groundwater Chemical Analyses from LM Monitoring Wells

International Nuclear Information System (INIS)

Kamp, Susan; Dayvault, Jalena

2016-01-01

This report documents the efforts and analyses conducted for the Applied Studies and Technology (AS&T) Ancillary Work Plan (AWP) project titled Evaluation of Pre- and Post- Redevelopment Groundwater Sample Laboratory Analyses from Selected LM Groundwater Monitoring Wells. This effort entailed compiling an inventory of nearly 500 previous well redevelopment events at 16 U.S. Department of Energy Office of Legacy Management (LM) sites, searching the literature for impacts of well redevelopment on groundwater sample quality, and-the focus of this report-evaluating the impacts of well redevelopment on field measurements and sample analytical results. Study Catalyst Monitoring well redevelopment, the surging or high-volume pumping of a well to loosen and remove accumulated sediment and biological build-up from a well, is considered an element of monitoring well maintenance that is implemented periodically during the lifetime of the well to mitigate its gradual deterioration. Well redevelopment has been conducted fairly routinely at a few LM sites in the western United States (e.g., the Grand Junction office site and the Gunnison processing site in Colorado), but at most other sites in this region it is not a routine practice. Also, until recently (2014-2015), there had been no specific criteria for implementing well redevelopment, and documentation of redevelopment events has been inconsistent. A catalyst for this evaluation was the self-identification of these inconsistencies by the Legacy Management Support contractor. As a result, in early 2015 Environmental Monitoring Operations (EMO) staff began collecting and documenting additional field measurements during well redevelopment events. In late 2015, AS&T staff undertook an independent internal evaluation of EMO's well redevelopment records and corresponding pre- and post-well-redevelopment groundwater analytical results. Study Findings Although literature discussions parallel the prevailing industry

Evaluation of Pre- and Post- Redevelopment Groundwater Chemical Analyses from LM Monitoring Wells

Energy Technology Data Exchange (ETDEWEB)

Kamp, Susan [Navarro Reserch and Engineering, Oak Ridge, TN (United States); Dayvault, Jalena [US Department of Energy, Washington, DC (United States). Office of Legacy Management

2016-05-01

This report documents the efforts and analyses conducted for the Applied Studies and Technology (AS&T) Ancillary Work Plan (AWP) project titled Evaluation of Pre- and Post- Redevelopment Groundwater Sample Laboratory Analyses from Selected LM Groundwater Monitoring Wells. This effort entailed compiling an inventory of nearly 500 previous well redevelopment events at 16 U.S. Department of Energy Office of Legacy Management (LM) sites, searching the literature for impacts of well redevelopment on groundwater sample quality, and—the focus of this report—evaluating the impacts of well redevelopment on field measurements and sample analytical results. Study Catalyst Monitoring well redevelopment, the surging or high-volume pumping of a well to loosen and remove accumulated sediment and biological build-up from a well, is considered an element of monitoring well maintenance that is implemented periodically during the lifetime of the well to mitigate its gradual deterioration. Well redevelopment has been conducted fairly routinely at a few LM sites in the western United States (e.g., the Grand Junction office site and the Gunnison processing site in Colorado), but at most other sites in this region it is not a routine practice. Also, until recently (2014–2015), there had been no specific criteria for implementing well redevelopment, and documentation of redevelopment events has been inconsistent. A catalyst for this evaluation was the self-identification of these inconsistencies by the Legacy Management Support contractor. As a result, in early 2015 Environmental Monitoring Operations (EMO) staff began collecting and documenting additional field measurements during well redevelopment events. In late 2015, AS&T staff undertook an independent internal evaluation of EMO's well redevelopment records and corresponding pre- and post-well-redevelopment groundwater analytical results. Study Findings Although literature discussions parallel the prevailing industry

Aspectos metodologicos de la medición en el sitio de ocurrencia de lesiones por accidentes de tráfico

Directory of Open Access Journals (Sweden)

Híjar-Medina Martha C.

1997-01-01

Full Text Available Os acidentes de trânsito de veículos a motor representam problema de saúde pública, em nível mundial. No México, a pesquisa, nesse campo, é limitada e a metodologia para seu estudo é pouco desenvolvida. Na literatura científica internacional são escassos os artigos que discutem os aspectos metodológicos de pesquisa nesse campo. Assim, realizou-se estudo com o objetivo de apresentar alguns aspectos metodológicos úteis para os interessados em pesquisar lesões por acidentes de trânsito. Foram discutidos aspectos sobre como medir, no local de ocorrência, as variáveis básicas para o estudo dessas lesões, tais como: se o motorista sofreu ou não lesões, uso de cinto de segurança, velocidade e consumo de álcool.

Spectroscopic analyses of chemical adaptation processes within microalgal biomass in response to changing environments

Energy Technology Data Exchange (ETDEWEB)

Vogt, Frank, E-mail: fvogt@utk.edu; White, Lauren

2015-03-31

Highlights: • Microalgae transform large quantities of inorganics into biomass. • Microalgae interact with their growing environment and adapt their chemical composition. • Sequestration capabilities are dependent on cells’ chemical environments. • We develop a chemometric hard-modeling to describe these chemical adaptation dynamics. • This methodology will enable studies of microalgal compound sequestration. - Abstract: Via photosynthesis, marine phytoplankton transforms large quantities of inorganic compounds into biomass. This has considerable environmental impacts as microalgae contribute for instance to counter-balancing anthropogenic releases of the greenhouse gas CO{sub 2}. On the other hand, high concentrations of nitrogen compounds in an ecosystem can lead to harmful algae blooms. In previous investigations it was found that the chemical composition of microalgal biomass is strongly dependent on the nutrient availability. Therefore, it is expected that algae’s sequestration capabilities and productivity are also determined by the cells’ chemical environments. For investigating this hypothesis, novel analytical methodologies are required which are capable of monitoring live cells exposed to chemically shifting environments followed by chemometric modeling of their chemical adaptation dynamics. FTIR-ATR experiments have been developed for acquiring spectroscopic time series of live Dunaliella parva cultures adapting to different nutrient situations. Comparing experimental data from acclimated cultures to those exposed to a chemically shifted nutrient situation reveals insights in which analyte groups participate in modifications of microalgal biomass and on what time scales. For a chemometric description of these processes, a data model has been deduced which explains the chemical adaptation dynamics explicitly rather than empirically. First results show that this approach is feasible and derives information about the chemical biomass

Spectroscopic analyses of chemical adaptation processes within microalgal biomass in response to changing environments

International Nuclear Information System (INIS)

Vogt, Frank; White, Lauren

2015-01-01

Highlights: • Microalgae transform large quantities of inorganics into biomass. • Microalgae interact with their growing environment and adapt their chemical composition. • Sequestration capabilities are dependent on cells’ chemical environments. • We develop a chemometric hard-modeling to describe these chemical adaptation dynamics. • This methodology will enable studies of microalgal compound sequestration. - Abstract: Via photosynthesis, marine phytoplankton transforms large quantities of inorganic compounds into biomass. This has considerable environmental impacts as microalgae contribute for instance to counter-balancing anthropogenic releases of the greenhouse gas CO 2 . On the other hand, high concentrations of nitrogen compounds in an ecosystem can lead to harmful algae blooms. In previous investigations it was found that the chemical composition of microalgal biomass is strongly dependent on the nutrient availability. Therefore, it is expected that algae’s sequestration capabilities and productivity are also determined by the cells’ chemical environments. For investigating this hypothesis, novel analytical methodologies are required which are capable of monitoring live cells exposed to chemically shifting environments followed by chemometric modeling of their chemical adaptation dynamics. FTIR-ATR experiments have been developed for acquiring spectroscopic time series of live Dunaliella parva cultures adapting to different nutrient situations. Comparing experimental data from acclimated cultures to those exposed to a chemically shifted nutrient situation reveals insights in which analyte groups participate in modifications of microalgal biomass and on what time scales. For a chemometric description of these processes, a data model has been deduced which explains the chemical adaptation dynamics explicitly rather than empirically. First results show that this approach is feasible and derives information about the chemical biomass adaptations

Aspectos de diseño de un entorno de programación colaborativo

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David Bracho

2008-12-01

Full Text Available ResumenLa programación colaborativa, o programación en par, es una de las áreas más estudiadas actualmente debido a su impacto en el proceso de desarrollo de software. El propósito de la presente investigación consistió en determinar los aspectos básicos de diseño que un entorno de programación colaborativo debe ofrecer a los desarrolladores. La metodología utilizada consistió en realizar un análisis documental sobre la propuesta de Lussier acerca de la programacióncolaborativa con la finalidad de determinar los aspectos de diseño, estructura e implementación de este tipo de entornos. Como resultado se obtuvo que desde el punto de vista del diseño, la comunicación entre desarrolladores, la revisión de código y la construcción del proyecto de software son los principales aspectos a considerar, y desde el punto de vista de la implementación se propone utilizar el modelo cliente - servidor y una arquitectura multiplataforma.AbstractCollaborative programming or pair programming is today one of the most studied areas, because of its impact on the software developing process. The purpose of the present investigation was to determine the basic design aspects that a collaborative programming environment must offer to developers. The methodology used was a documental review of Lussier’s work about collaborative programming, to determine the design aspects, the structure and the implementation aspects of this type of environments. As result, from the design point of view, the communication between developers, code review and the construction of software project are the basic aspects to consider, and from the implementation point of view, the use of the client - server model and a multiplatform architecture are proposed.

Lessons learned from radioactive/mixed waste analyses at EG ampersand G Idaho, Inc

International Nuclear Information System (INIS)

Murphy, R.J.; Sailer, S.J.; Bennett, J.T.; Arvizu, J.S.

1990-01-01

For the past 30 years extensive chemical characterizations of environmental and waste samples have been performed by numerous academic, commercial, and government analytical chemistry laboratories for the purposes of research, monitoring, and compliance with regulations. The vast majority of these analyses, however, has been conducted on samples containing natural concentrations of radioactive constituents. It is only within the last decade that a small number of laboratories have been conducting extensive chemical characterizations of highly radioactive samples and consequently have begun to identify many special requirements for the safe and accurate conduct of such analyses. Experience gained from chemical analyses of radioactively contaminated samples has indicated special requirements and actions needed in the following three general areas: Sample collection and preservation; chemical analysis protocols; disposal of waste from chemical analyses. In this paper we will summarize the experience and findings acquired from four years of radioactive sample analyses by the Environmental Chemistry Unit, an analytical chemistry laboratory of EG ampersand G Idaho, Inc. at the Idaho National Engineering Laboratory. 6 tabs

Tumores em animais de produção: aspectos comparativos

OpenAIRE

Ramos,Adriano Tony; Souza,Arlete Benta de; Norte,Diego Mollerke; Ferreira,João Luiz Montiel; Fernandes,Cristina Gevehr

2008-01-01

Com o objetivo de realizar um estudo retrospectivo de tumores em animais de produção (bovinos, ovinos, eqüinos e suínos), foi realizada uma revisão nos casos suspeitos de neoplasmas recebidos pelo Laboratório Regional de Diagnóstico da Faculdade de Veterinária da Universidade Federal de Pelotas num período de 24 anos (1978-2002). Os aspectos epidemiológicos dos neoplasmas nessas espécies foram relatados, e uma classificação concisa para padronizar a nomenclatura, seguindo padrões internaciona...

GRANNY, a data bank of chemical analyses of Laramide and younger high-silica rhyolites and granites from Colorado and north-central New Mexico

Science.gov (United States)

Steigerwald, Celia H.; Mutschler, Felix E.; Ludington, Steve

1983-01-01

GRANNY is a data bank containing information on 507 chemically analyzed Laramide or younger high-silica rhyolites and granites from Colorado and north-central New Mexico. The data were compiled from both published and unpublished sources. The data bank is designed to aid in the recognition of igneous rocks with a high exploration potential for the discovery of molybdenum (and other lithophile element) deposits. Information on source reference, geographic location, age, mineralogic and petrologic characteristics, major constituent analyses, and trace element analyses for each sample are given. The data bank is available in two formats: 1) paper- or microfiche-hardcopy, and 2) fixed format computer readable magnetic tape.

Analysing chemical equilibrium conditions when studying butyl acetate synthesis

OpenAIRE

Álvaro Orjuela Londoño; Fernando Leiva Lenis; Luis Alejandro Boyacá Mendivelso; Gerardo Rodríguez Niño; Luis María Carballo Suárez

2010-01-01

This work studied the liquid phase of acetic acid and butyl alcohol esterification reaction (P atm = 560 mmHg),using an ion exchange resin (Lewatit K-2431) as catalyst. A set of assays were carried out for determining the effect of catalyst load, temperature and molar ratio (acid/alcohol) on chemical equilibrium constant. Components’ selective sorption on the resin matrix was noticed; its effect on equilibrium conditions was verified, by using different acid/alcohol starting ratios. A non-ide...

Aspectos relativos a la salud laboral y los riesgos psicosociales de los equipos de proyectos

OpenAIRE

Donate Fernández, Alejandro

2013-01-01

Es el objetivo del presente trabajo presentar una serie de directrices relacionadas con la salud laboral y los riesgos psicosociales de los equipos de proyectos y, en algunos aspectos centrándose en el principal responsable: el director de proyecto.

Dor neuropática central após lesão medular traumática: capacidade funcional e aspectos sociais

OpenAIRE

Vall, Janaina; Braga, Violante Augusta Batista

2005-01-01

Estudo de caso comparativo com o objetivo de avaliar a capacidade funcional e os aspectos sociais de dois pacientes, ambos com lesão medular traumática, sem e com dor neuropática central associada, respectivamente. Para avaliar a capacidade funcional, foi utilizado como instrumento o Functional Independence Measure ou Escala de Independência Funcional. E para avaliar os aspectos sociais foi construído o ecomapa de cada paciente, preconizado pelo modelo Calgary de avaliação de famílias. Ambos ...

Aspectos cuantitativos de los programas universitarios de administración de empresas en Colombia

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Carlos Henao Restrepo

1991-05-01

Full Text Available RESUMEN La estabilización o el crecimiento en la oferta universitaria de este programa, en términos  cuantitativos como cualitativos, es uno de los aspectos críticos para las instituciones que postulan mejoras de calidad dentro de las nuevas reglas del mercado educativo.

Physico-Chemical and Bacteriological Analyses of Water Used for ...

African Journals Online (AJOL)

Samuel Olaleye

Physicochemical and bacteriological analyses were carried out on well water, stream water and river water used for drinking and swimming purposes in. Abeokuta, Nigeria. The results obtained were compared with WHO and EPA standards for drinking and recreational water. With the exception of Sokori stream and a well ...

Physico-chemical analyses of Hispano-Moresque lustred ceramic: a precursor for Italian majolica?

Science.gov (United States)

Chabanne, D.; Bouquillon, A.; Aucouturier, M.; Dectot, X.; Padeletti, G.

2008-07-01

The paper presents a comprehensive physico-chemical investigation on a series of Hispano-Moresque objects produced in the eastern Spain workshops between the XIV and XVIII centuries and fragments from XII century, in order to compare them with the Italian Renaissance majolica production. The techniques used are mainly non-destructive (ion beam analyses and X-ray diffraction), sometimes complemented by SEM observation and microanalysis, and electrothermal atomic emission spectrometry. Such methods allow a full description of the terra cotta, of the glaze and of the different surface layers which constitute the lustre decoration indicating individual elemental composition and thickness of each layer containing or not metallic nanoparticles. Principal results show the following: i) a constant source of supply for the eastern Spain terra cotta; ii) a significant change in the composition of the Spanish glazes around the XVII century, with the disappearance of the opacifying tin oxide addition; iii) significant evolutions in the structure and composition of the lustre layers, in particular related to the presence or not of a metal-free surface glaze film and its thickness; iv) interesting analogies and differences with the Italian majolica; v) confirmation of the change in the quality of blue pigment during XVI century, already evidenced by the authors in previous publications. A discussion about the transmission of the lustre technique between eastern Spain and Italy at the Renaissance period is proposed.

Treatment of spices with ionizing radiation - chemical, organoleptical, microbiological and toxicological analyses. Pt. 1. Behandlung von Gewuerzen mit ionisierenden Strahlen - chemische, organoleptische, mikrobiologische und toxikologische Aspekte

Energy Technology Data Exchange (ETDEWEB)

Schuettler, C; Boegl, W

1984-01-01

In a study of the relevant literature the results of tests on 30 radiation treated spices were evaluated. The tests contain chemical, organoleptical, microbiological and toxicological analyses. Most of the spices were treated with gamma radiation from cobalt-60 sources with doses up to 60 kGy.

Extra virgin olive oil bitterness evaluation by sensory and chemical analyses.

Science.gov (United States)

Favati, Fabio; Condelli, Nicola; Galgano, Fernanda; Caruso, Marisa Carmela

2013-08-15

An experimental investigation was performed on blend extra virgin olive oils (EVOOs) from different cultivars and EVOO from different olive monovarieties (Coratina, Leccino, Maiatica, Ogliarola) with the aim to evaluate the possibility of estimating the perceived bitterness intensity by using chemical indices, such as the total phenol content and the compounds responsible for oil bitterness measured spectrophotometrically at 225 nm (K225 value), as bitterness predictors in different EVOO. Therefore, a bitterness predictive model, based on the relationship between the perceived bitterness intensity of the selected stimuli and the chosen chemicals parameters has been built and validated. The results indicated that the oil bitterness intensity could be satisfactorily predicted by using the K225 values of oil samples. Copyright © 2013 Elsevier Ltd. All rights reserved.

Responsabilidad de directores de sociedades en Estados Unidos. Aspectos procesales

Directory of Open Access Journals (Sweden)

Héctor José Miguens

2015-01-01

El objeto de este artículo es describir este régimen en su totalidad y realizar un juicio crítico de las normas que rigen las acciones procesales de la responsabilidad de los directores de sociedades comerciales en el derecho societario en Estados Unidos. La metodología utilizada en este trabajo responde a la sistemática de los autores norteamericanos citados, que se caracteriza por centrarse en los aspectos prácticos, la solución de problemas particulares y el comentario crítico de la jurisprudencia aplicable a la cuestión.

Aspectos das relações interpessoais em Freud: questionamentos morais

OpenAIRE

Virginia Helena Ferreira da Costa

2014-01-01

O objetivo principal da dissertação é problematizar, a partir de textos de Freud, o prolongamento de expectativas e fantasias próprias da infância em aspectos sociais e políticos da vida adulta. Para tanto, as relações interpessoais são consideradas mediante dois pontos de vista da teoria freudiana, a saber, o do desenvolvimento individual e das relações e estruturas sociais. Como pano de fundo para tal problemática, são abordadas a experiência edípica infantil e a situação de desamparo como ...

Aspectos psicológicos del paciente con cáncer

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R. Labarca B.

2017-05-01

Full Text Available El profundo cambio que ha experimentado lamedicina en los últimos años, ha traído como consecuencia un deterioro en la relación médico-paciente. La consecuencia de este hecho es un distanciamiento entre médico y enfermo, situación que afecta seriamente a los pacientes con enfermedades incurables o terminales. El presente artículo revisa los aspectos psicológicos principales del enfermo con cáncer y concluye que la única actitud que cabe ante el enfermo canceroso es la verdadera relación médico-paciente.

ASPECTOS REPRODUCTIVOS EN MUJERES PORTADORAS DE MUTACIONES GENÉTICAS BRCA

OpenAIRE

Dr. Octavio Peralta; Dr. Tulio Rodríguez; Dra. Adela Camus

2017-01-01

Se analizan diferentes aspectos reproductivos en mujeres portadoras de mutaciones genéticas BRCA. Se revisa la evidencia científica del riesgo que agrega el uso de anticoncepción hormonal a mujeres con diferentes niveles de riesgo concluyendo que con las formulaciones recientes después del 2010 no hay aumento del riesgo de cáncer de mama. En portadoras de mutaciones BRCA, el uso prolongado antes de los 25 años se asocia a un leve mayor riesgo de diagnóstico temprano de cáncer de mama. Se a...

Reprocessing of spent nuclear fuel, Annex 3: Chemical and radiometric control analyses

International Nuclear Information System (INIS)

Gal, I.

1964-01-01

Simple, fast and reliable control analyses are obligatory during reprocessing. The analyses performed covered measuring the contents of uranium in water and organic solutions, contents of plutonium in water and organic solutions as well as the free acid in both solutions. In addition temporary analyses were done to determine the density of water and organic solutions as well as content of TBP in kerosine

EMPREENDEDORISMO CORPORATIVO - ASPECTOS DE INOVAÇÃO E MUDANÇA ORGANIZACIONAL

Directory of Open Access Journals (Sweden)

Luciana Gehlen

2016-11-01

Full Text Available Este artigo analisa o conceito de empreendedorismo corporativo – conhecido também como empreendedorismo interno ou intra-empreendedorismo, seus aspectos relacionados aos fatores de criatividade, inovação e mudança organizacional como fatores de competitividade das organizações, bem como o perfil do empreendedor corporativo e o ambiente organizacional necessário para que o empreendedorismo interno aconteça. Palavras-chave: empreendedorismo corporativo, empreendedorismo interno, intra-empreendedorismo, inovação, mudança organizacional.

Toxicologia do tolueno: aspectos relacionados ao abuso

Directory of Open Access Journals (Sweden)

Forster Letícia M.K.

1994-01-01

Full Text Available O tolueno está presente em muitos produtos de uso doméstico e industrial e é o principal solvente envolvido no abuso de substâncias e na exposição ocupacional. O problema mais grave no estudo de patologias relacionadas ao tolueno é que este está geralmente associado, em suas preparações comerciais, a outras substâncias. O potencial tóxico do tolueno foi abordado nos seguintes aspectos: parâmetros farmacológicos; características físico-químicas; exposição; estudos clínicos; diagnóstico; pesquisa experimental; tolerância e dependência; efeitos agudos e crônicos; neurotoxicidade; teratogenicidade; doenças psiquiátricas; carcinogenicidade e tratamento. Conclui-se ser de grande importância e urgência que se realizem estudos clínicos com amostras maiores para definição mais precisa das conseqüências do uso crônico

Toxicologia do tolueno: aspectos relacionados ao abuso

Directory of Open Access Journals (Sweden)

Letícia M.K. Forster

1994-04-01

Full Text Available O tolueno está presente em muitos produtos de uso doméstico e industrial e é o principal solvente envolvido no abuso de substâncias e na exposição ocupacional. O problema mais grave no estudo de patologias relacionadas ao tolueno é que este está geralmente associado, em suas preparações comerciais, a outras substâncias. O potencial tóxico do tolueno foi abordado nos seguintes aspectos: parâmetros farmacológicos; características físico-químicas; exposição; estudos clínicos; diagnóstico; pesquisa experimental; tolerância e dependência; efeitos agudos e crônicos; neurotoxicidade; teratogenicidade; doenças psiquiátricas; carcinogenicidade e tratamento. Conclui-se ser de grande importância e urgência que se realizem estudos clínicos com amostras maiores para definição mais precisa das conseqüências do uso crônico

Impacto de las redes sociales e internet en la adolescencia: aspectos positivos y negativos

Directory of Open Access Journals (Sweden)

L. Elías Arab, Dr.

2015-01-01

Full Text Available Este artículo presenta una revisión teórica del impacto, tanto positivo como negativo, de las redes sociales en los adoles- centes y de la relación directa entre esto y el uso o abuso de las nuevas tecnologías. A su vez, se establece el vínculo entre las formas de utilizarlas y las características psicológi- cas individuales, los desarrollos previos de personalidad y el control parental. Se toma como punto de partida el desa- rrollo adolescente asociado a la construcción de la identidad juvenil en el contexto de un nuevo paradigma comunica- cional (cibercomunicación, donde el límite entre lo públi- co y lo privado se torna cada vez más difuso. Se expone la terminología propia de las redes sociales y se pone énfasis en las estrategias de supervisión y control adulto. Se deta- llan los aspectos positivos que las nuevas tecnologías ofre- cen (diversas oportunidades de aprendizaje, entretención, socialización, desarrollo de habilidades, creatividad y me- jora de la motivación al aprendizaje especialmente en ado- lescentes, entre otros y los aspectos negativos asociados (distanciamiento afectivo, pérdida de límites en la comuni- cación y pérdida de la capacidad de escucha, entre otros. Este artículo destaca la necesidad de entregar y estimular modelos de comunicación social reales y una educación en el uso de las nuevas tecnologías. El objetivo es actualizar y orientar a profesionales de la salud sobre los aspectos posi- tivos y/o negativos de las redes sociales en los adolescentes.

Toxicologia do tolueno: aspectos relacionados ao abuso Toluene toxicology: abuse aspects

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Letícia M.K. Forster

1994-04-01

Full Text Available O tolueno está presente em muitos produtos de uso doméstico e industrial e é o principal solvente envolvido no abuso de substâncias e na exposição ocupacional. O problema mais grave no estudo de patologias relacionadas ao tolueno é que este está geralmente associado, em suas preparações comerciais, a outras substâncias. O potencial tóxico do tolueno foi abordado nos seguintes aspectos: parâmetros farmacológicos; características físico-químicas; exposição; estudos clínicos; diagnóstico; pesquisa experimental; tolerância e dependência; efeitos agudos e crônicos; neurotoxicidade; teratogenicidade; doenças psiquiátricas; carcinogenicidade e tratamento. Conclui-se ser de grande importância e urgência que se realizem estudos clínicos com amostras maiores para definição mais precisa das conseqüências do uso crônicoToluene, present in many industrial and domestic products, is the main solvent involved in solvent abuse and occupational exposure. The main problem in studying toluene-related pathologies is the fact that it is frequently combined with other substances. This review focuses on its potential toxicity. The following subjects are discussed: pharmacologic parameters; physico-chemical features; exposure; clinical trials; experimental research; diagnosis; tolerance and dependence; acute and chronic effects; neurotoxicity; teratogenicity; psychiatric disorders; carcinogenicity; and treatment. It is concluded that is important more research on larger population samples with a view to better definition of the consequences.of chronic use should be undertaken.

Evidências neuropsicológicas da existiência de um nódulo de aspecto

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Celso Novaes

2012-11-01

Full Text Available Assumindo que todas as línguas naturais compartilham das mesmascategorias funcionais, mostrando assim um alto grau de uniformidade,este trabalho apresenta algumas evidências neuropsicológicas quedizem respeito à dissociação entre a expressão lingüística de tempoe a expressão lingüística de aspecto, em indivíduos com patologiada linguagem – afasia de Broca. Essas evidências nos permitemdefender a hipótese de que a camada flexional seria formada de pelomenos duas subcamadas, sendo uma dessas a camada que projetaindependentemente os traços de aspecto. Essa hipótese vem aoencontro da proposta de Pollock (1989 de que a camada flexionalseria constituída de dois nódulos e da proposta de Chomsky (1995de que somente os traços semanticamente interpretáveis nas interfaceslingüísticas projetariam uma categoria funcional.

Aspectos ergonômicos relacionados com o ambiente e equipamentos hospitalares Aspectos ergonómicos relacionados con el ambiente y aparatos hospitalarios Ergonomic aspects of the hospital working environment and equipment

Directory of Open Access Journals (Sweden)

Neusa Maria Costa Alexandre

1998-10-01

Full Text Available A ergonomia tem sido difundida como uma das mais importantes estratégias para reduzir os problemas originados por situações de trabalho que causam lesões no sistema músculo-esquelético. O presente trabalho discute determinados aspectos do ambiente como espaço de trabalho, altura da superfície de trabalho, limites de alcance e equipamentos, relacionando-os com as atividades ocupacionais da enfermagem.La ergonomía ha sido difundida como una de las más importantes estratégias para disminuir los problemas originados por situaciones de trabajo que causan lesiones en el sistema musculosquelético. El presente trabajo discute determinados aspectos del ambiente como espacio de trabajo, altura de la superficie de trabajo, limites del alcance y aparatos, relacionándolos con las actividades ocupacionales de enfermería.Ergonomics has been one of the most important strategies for reducing musculoskeletal injuries caused by working conditions. The present report discusses particular aspects of the working environment such as work space, working heights, as well as the limits of reach and of the equipment used, and attempts to relate these to the occupational activities in nursing.

Islamic State and Chemical Weapons

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Lukáš Rafay

2016-09-01

Full Text Available The article deals with topic of Islamic State and chemical weapons. The issue is analysed in three dimensions: origin of used chemical weapons and possibility of independent production; known chemical attacks and tactical regularities in their execution; and traits of future chemical terrorist attacks. By providing a thorough examination of the problem, the article aims at predicting the future development of the group’s chemical program as well as describing any prospective chemical terrorist attacks in Europe

Computational Analyses of Complex Flows with Chemical Reactions

Science.gov (United States)

Bae, Kang-Sik

The heat and mass transfer phenomena in micro-scale for the mass transfer phenomena on drug in cylindrical matrix system, the simulation of oxygen/drug diffusion in a three dimensional capillary network, and a reduced chemical kinetic modeling of gas turbine combustion for Jet propellant-10 have been studied numerically. For the numerical analysis of the mass transfer phenomena on drug in cylindrical matrix system, the governing equations are derived from the cylindrical matrix systems, Krogh cylinder model, which modeling system is comprised of a capillary to a surrounding cylinder tissue along with the arterial distance to veins. ADI (Alternative Direction Implicit) scheme and Thomas algorithm are applied to solve the nonlinear partial differential equations (PDEs). This study shows that the important factors which have an effect on the drug penetration depth to the tissue are the mass diffusivity and the consumption of relevant species during the time allowed for diffusion to the brain tissue. Also, a computational fluid dynamics (CFD) model has been developed to simulate the blood flow and oxygen/drug diffusion in a three dimensional capillary network, which are satisfied in the physiological range of a typical capillary. A three dimensional geometry has been constructed to replicate the one studied by Secomb et al. (2000), and the computational framework features a non-Newtonian viscosity model for blood, the oxygen transport model including in oxygen-hemoglobin dissociation and wall flux due to tissue absorption, as well as an ability to study the diffusion of drugs and other materials in the capillary streams. Finally, a chemical kinetic mechanism of JP-10 has been compiled and validated for a wide range of combustion regimes, covering pressures of 1atm to 40atm with temperature ranges of 1,200 K--1,700 K, which is being studied as a possible Jet propellant for the Pulse Detonation Engine (PDE) and other high-speed flight applications such as hypersonic

Cinema novo e sua relação com o Modernismo literário: reflexões sobre aspectos similares

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Julierme Morais

2017-07-01

Full Text Available No presente artigo visamos problematizar a relação entre os movimentos culturais brasileiros do Cinema Novo e do Modernismo literário, buscando demonstrar como o movimento cinematográfico potencializado nos anos de 1960 possui alguns aspectos similares ao movimento literário iniciado oficialmente na Semana de Arte Moderna de 1922. Para tanto, abordamos dois aspectos fundamentais. A saber: a adoção das conquistas artísticas de vanguarda, acompanhada da desintegração da linguagem artística tradicional, e a busca da “legítima” expressão artística nacional.

La Entomofagia en México. Algunos aspectos culturales

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Felipe Carlos Viesca González

2009-01-01

Full Text Available En este trabajo se abordan aspectos culturales del consumo de insectos con fines alimenticios en México y el mundo; particularmente se analiza la entomofagia en la época prehispánica y nuestros días, así como las causas por las cuales ha disminuido el consumo de estos artrópodos. Se explica porqué se ha creado una aversión hacia los insectos en diversos países y algunas regiones de México. Se reflexiona acerca del valor nutritivo de los insectos y las distintas culturas que han hecho posible que sobreviva esta práctica culinaria en el centro y sur del territorio nacional, algunas formas de preparar platillos basados en insectos, así como los problemas que enfrenta actualmente esta costumbre alimenticia entre los mexicanos y sus perspectivas.

Risk analyses of nuclear power plants

International Nuclear Information System (INIS)

Jehee, J.N.T.; Seebregts, A.J.

1991-02-01

Probabilistic risk analyses of nuclear power plants are carried out by systematically analyzing the possible consequences of a broad spectrum of causes of accidents. The risk can be expressed in the probabilities for melt down, radioactive releases, or harmful effects for the environment. Following risk policies for chemical installations as expressed in the mandatory nature of External Safety Reports (EVRs) or, e.g., the publication ''How to deal with risks'', probabilistic risk analyses are required for nuclear power plants

Aspectos legales al utilizar las principales redes sociales en Colombia

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Manuel Adolfo Alvarado Carmona

2017-01-01

Full Text Available Se analizaron los aspectos legales al utilizar las dos principales redes sociales en Colombia como los son facebook y twitter. Cuando un usuario se conecta a cualquiera de las redes sociales debe hacerlo de forma responsable porque de lo contrario puede incurrir en la violación de la normatividad Colombiana en la cual se encuentran los delitos informáticos, la protección de la información y los datos, injuria y calumnia, ciberacoso y derechos de autor. Se determinaron los problemas que conllevan cuando no se utiliza bien la información en las redes sociales en el ámbito jurídico.

Elaboration process, chemical and sensory analyses of fried-salted soybean

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Gayol, María F.

2010-09-01

Full Text Available The purpose of this work was to develop an elaboration process of fried-salted soybean and to determine the chemical composition, consumer acceptance and sensory description of the product. Different fried-salted soybean products were obtained under different temperature and time conditions by maceration in water, roasting and frying. Four of the best products were selected and evaluated by consumers (overall, color and texture acceptances: FSS1, FSS2, FSS3 and FSS4. The product with the highest consumer acceptance (7 = “like moderately” in a hedonic scale of 9 points was the one obtained by maceration at 100°C during 10 min and fried at 170°C for 5 min (FSS3. Proximate and fatty acid composition along with sensory attribute intensity ratings from descriptive analyses were determined on the fried-salted soybean with the highest consumer acceptance (FSS3. Proximate and fatty acid composition were also determined in raw soybeans. FSS3 had lower percentages of moisture and proteins, and higher lipids and carbohydrates than raw soybean. The use of sunflower oil in the frying process improved the fatty acid composition of the soybean product. Sensory attributes from descriptive analyses that were detected in high intensity ratings for the product were roasted, salty, crunchiness, hardness, brown color and gloss. This product is neither commonly consumed nor easily available in markets. It could be promoted to be consumed as a snack because of its high nutritional and sensory quality.

El propósito de este trabajo fue desarrollar un proceso de elaboración de soja frita salada, determinar la composición química, la aceptabilidad por consumidores y la descripción sensorial del producto. Diferentes productos de soja frita salada fueron obtenidos bajo diferentes condiciones de temperatura y tiempo de: maceración, tostado y fritura. Los consumidores evaluaron y seleccionaron los cuatro mejores productos, los que presentaron mayor aceptaci

Toxicity and chemical analyses of airport runoff waters in Poland.

Science.gov (United States)

Sulej, Anna Maria; Polkowska, Zaneta; Wolska, Lidia; Cieszynska, Monika; Namieśnik, Jacek

2014-05-01

The aim of this study was to assess the ecotoxicological effects of various compounds in complex airport effluents using a chemical and ecotoxicological integrated strategy. The present work deals with the determination of sum of PCBs, PAHs, pesticides, cations, anions, phenols, anionic, cationic, non-ionic detergents, formaldehyde and metals--as well as TOC and conductivity--in runoff water samples collected from 2009 to 2011 at several locations on two Polish international airports. Two microbiotests (Vibrio fischeri bacteria and the crustacean Thamnocephalus platyurus) have been used to determine the ecotoxicity of airport runoff waters. The levels of many compounds exceeded several or even several tens of times the maximum permissible levels. Analysis of the obtained data shows that samples that displayed maximum toxicity towards the bioindicators Vibrio fischeri were not toxic towards Thamnocephalus platyurus. Levels of toxicity towards T. platyurus are strongly correlated with pollutants that originate from the technological operations related to the maintenance of airport infrastructure. The integrated (chemical-ecotoxicological) approach to environmental contamination assessment in and around airports yields extensive information on the quality of the environment. These methodologies can be then used as tools for tracking the environmental fate of these compounds and for assessing the environmental effect of airports. Subsequently, these data will provide a basis for airport infrastructure management.

Audición espacial en ambientes reverberantes: aspectos teóricos relevantes

OpenAIRE

Claudia Arias; Oscar A. Ramos

2003-01-01

En ambientes reverberantes el sonido se propaga en múltiples direcciones sufriendo cambios físicos de importancia. El sistema auditivo debe se capaz de resolver la competencia perceptual que se produce entre el sonido original y sus reflexiones. En este artículo se presentan aspectos teóricos relevantes de la audición espacial con especial tratamiento del efecto precedente. Se trata de una estrategia inconciente que el individuo utiliza para enfrentar la información sonora conf...

Medicina Genómica Aspectos éticos, legales y sociales del Genoma Humano

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Rodolfo E. Ávila

2011-01-01

Full Text Available La Medicina Genómica es el uso de la inf ormación de los genomas y sus deriv ados (ARN, proteínas y met abolitos que permite guiar la toma de decisiones médicas, es un c omponente clave de la medicina personalizada. La Medicina Genómica permite conocer la cartografía del genoma hum ano y proporciona una valiosa información a tener en cuenta a la hora de detect ar genes implicados en ciert as enfermedades. Esto conlleva a que en la actualidad nos centremos más en la predicción de patologías que en l a prevención, por lo que la tendencia es que en el futuro la Medicina Genómica acabe desbancando a la Medicina P reventiva. El Proyecto Genoma Humano presenta diversas aplicaciones que, al no tener una clara cobert ura legal, traen consigo un nuevo paradigma con problemas éticos, sociales y legales que la comunidad científica trat a de resolver para compaginar los aspectos morales con el progreso en la investigación. El objetivo del presente trabajo es describir brevemente los aspectos éticos, legales y sociales del Genoma Humano.

Oxidation state analyses of uranium with emphasis on chemical speciation in geological media

International Nuclear Information System (INIS)

Ervanne, H.

2004-01-01

, linearity, repeatability and comparability of methods were examined. Both Nd-coprecipitation and ion exchange were found to be valid and reliable methods. Both are suitable tools for studying oxidation/reduction mechanisms in geochemical processes. The oxidation state analyses of uranium in different geological materials gave new information on the chemical speciation and behaviour of uranium. (orig.)

Morphological, chemical and developmental aspects of the Dufour gland in some eusocial bees (Hymenoptera, Apidae: a review

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Fábio Camargo Abdalla

2006-06-01

Full Text Available Morphological, chemical and developmental aspects of the Dufour gland in some eusocial bees (Hymenoptera, Apidae: a review. The present revision focused on the more recent data about the Dufour gland in some eusocial bees, taking in account general aspects of its morphology, secretion chemical nature, bio-synthetic pathway and development. Many functions have been attributed to this gland in eusocial bees, but none are convincing. With the new data about this gland, not only the secretion chemical pathway of the Dufour gland may be reasonable understood, as its function in some eusocial bees, especially Apis mellifera Linné, 1758, which has been extensively studied in the last years.Aspectos morfológicos, químicos e do desenvolvimento da glândula de Dufour em algumas abelhas eussociais (Hymenoptera, Apidae: revisão. Esta revisão aborda os mais recentes dados sobre a glândula de Dufour em algumas abelhas eussociais, considerando aspectos gerais da sua morfologia, do seu desenvolvimento, da natureza química da sua secreção, assim como sua via bio-sintética. Muitas funções têm-se atribuído à glândula de Dufour nas abelhas eussociais, mas nenhuma suficientemente convincente. Os novos dados a respeito dessa glândula permitem não só conhecer razoavelmente bem a via bio-sintética como a função da secreção da glândula de Dufour em algumas abelhas eussociais, especialmente em Apis mellifera Linné, 1758, a qual tem sido extensivamente estudada nos últimos anos.

Applying Data Mining Techniques to Chemical Analyses of Pre-drill Groundwater Samples within the Marcellus Formation Shale Play in Bradford County, Pennsylvania

Science.gov (United States)

Wen, T.; Niu, X.; Gonzales, M. S.; Li, Z.; Brantley, S.

2017-12-01

Groundwater samples are collected for chemical analyses by shale gas industry consultants in the vicinity of proposed gas wells in Pennsylvania. These data sets are archived so that the chemistry of water from homeowner wells can be compared to chemistry after gas-well drilling. Improved public awareness of groundwater quality issues will contribute to designing strategies for both water resource management and hydrocarbon exploration. We have received water analyses for 11,000 groundwater samples from PA Department of Environmental Protection (PA DEP) in the Marcellus Shale footprint in Bradford County, PA for the years ranging from 2010 to 2016. The PA DEP has investigated these analyses to determine whether gas well drilling or other activities affected water quality. We are currently investigating these analyses to look for patterns in chemistry throughout the study area (related or unrelated to gas drilling activities) and to look for evidence of analytes that may be present at concentrations higher than the advised standards for drinking water. Our preliminary results reveal that dissolved methane concentrations tend to be higher along fault lines in Bradford County [1]. Lead (Pb), arsenic (As), and barium (Ba) are sometimes present at levels above the EPA maximum contaminant level (MCL). Iron (Fe) and manganese (Mn) more frequently violate the EPA standard. We find that concentrations of some chemical analytes (e.g., Ba and Mn) are dependent on bedrock formations (i.e., Catskill vs. Lock Haven) while concentrations of other analytes (e.g., Pb) are not statistically significantly distinct between different bedrock formations. Our investigations are also focused on looking for correlations that might explain water quality patterns with respect to human activities such as gas drilling. However, percentages of water samples failing EPA MCL with respect to Pb, As, and Ba have decreased from previous USGS and PSU studies in the 1990s and 2000s. Public access to

Aspectos claves relacionados con la gestión del e.Learning

OpenAIRE

Francisco Lupiáñez Villanueva

2006-01-01

La introducción y uso de las Tecnologías de la Información y la Comunicación, especialmente Internet, en el ámbito de la salud, la medicina y los sistemas sanitarios enfrenta a todos los agentes e instituciones ante numerosos retos. La educación y la formación, como actividades claves tanto de la sociedad de la información como de los sistemas sanitarios, también se ven afectadas por este proceso de cambio. La finalidad de este artículo es identificar y analizar algunos de los aspectos claves...

ASPECTOS TAXONÔMICOS, FITOGEOGRÁFICOS E USOS DE Pectis uniaristata DC. var. jangadensis (S.Moore) Keil (ASTERACEAE)

OpenAIRE

PEREIRA, ARILDO GONÇALO; NETO, GERMANO GUARIM

2014-01-01

Este trabalho discute os aspectos taxonômicos, fitogeográficos e outros relacionados à Pectis uniaristata var. jangadensis (S. Moore) Keil (Asteraceae) uma planta de ocorrência na vegetação do cerrado e do pantanal de Mato Grosso.

Numerical tables on physical and chemical analyses of Rhine water 1983

International Nuclear Information System (INIS)

1984-01-01

The numerical tables contain the measuring results of the physical-chemical studies on the Rhine water for the year 1983. The tables are arranged by general parameters, organic matter, eutrophicating substances, anorganic matter, metals, organic micropollution as well as by radioactivity (total alpha- or beta- and T-activity). (MM) [de

Amazing variational approach to chemical reactions

OpenAIRE

Fernández, Francisco M.

2009-01-01

In this letter we analyse an amazing variational approach to chemical reactions. Our results clearly show that the variational expressions are unsuitable for the analysis of empirical data obtained from chemical reactions.

A combined approach to investigate the toxicity of an industrial landfill's leachate: Chemical analyses, risk assessment and in vitro assays

International Nuclear Information System (INIS)

Baderna, D.; Maggioni, S.; Boriani, E.; Gemma, S.; Molteni, M.; Lombardo, A.; Colombo, A.; Bordonali, S.; Rotella, G.; Lodi, M.; Benfenati, E.

2011-01-01

Solid wastes constitute an important and emerging problem. Landfills are still one of the most common ways to manage waste disposal. The risk assessment of pollutants from landfills is becoming a major environmental issue in Europe, due to the large number of sites and to the importance of groundwater protection. Furthermore, there is lack of knowledge for the environmental, ecotoxicological and toxicological characteristics of most contaminants contained into landfill leacheates. Understanding leachate composition and creating an integrated strategy for risk assessment are currently needed to correctly face the landfill issues and to make projections on the long-term impacts of a landfill, with particular attention to the estimation of possible adverse effects on human health and ecosystem. In the present study, we propose an integrated strategy to evaluate the toxicity of the leachate using chemical analyses, risk assessment guidelines and in vitro assays using the hepatoma HepG2 cells as a model. The approach was applied on a real case study: an industrial waste landfill in northern Italy for which data on the presence of leachate contaminants are available from the last 11 years. Results from our ecological risk models suggest important toxic effects on freshwater fish and small rodents, mainly due to ammonia and inorganic constituents. Our results from in vitro data show an inhibition of cell proliferation by leachate at low doses and cytotoxic effect at high doses after 48 h of exposure. - Research highlights: → We study the toxicity of leachate from a non-hazardous industrial waste landfill. → We perform chemical analyses, risk assessments and in vitro assays on HepG2 cells. → Risk models suggest toxic effects due to ammonia and inorganic constituents. → In vitro assays show that leachate inhibits cell proliferation at low doses. → Leachate can induce cytotoxic effects on HepG2 cells at high doses.

Estrategia Guiada por Modelos para incluir Aspectos de Seguridad en Sistemas Empotrados Basados en Servicios Web

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Juan Pedro Silva Gallino

2014-01-01

Full Text Available Resumen: En los sistemas distribuidos modernos, como la Internet o Web de las Cosas, la seguridad juega un papel preponderante. Debe prestarse especial atencio’n a la consideracio’n de estos aspectos en las primeras etapas de desarrollo. En este contexto, el desarrollo guiado por modelos de requisitos no funcionales (NF presenta especial intere's, ya que aborda dichas caracter’ısticas NF en la etapa de diseño, cuando todav’ıa se pueden realizar ana’lisis, y au’n hay margen para modificaciones antes de que e'stas sean muy costosas. El uso de estas metodolog’ıas guiadas por modelos ofrece beneficios tales como el aumento de la productividad, una mayor reutilizacio’n de los elementos de diseño, o una mejor mantenibilidad del sistema. Este art’ıculo presenta una estrategia de desarrollo que permite integrar aspectos NF de seguridad (confidencialidad, integridad, y control de acceso en los sistemas de software empotrado. Abstract: In modern distributed systems, such as in the Internet or Web of Things, security plays a fundamental role. Special atention must be placed, then, in considering these aspects in the first stages of development. In this context, the model-driven development of non functional (NF requirements is of great interest, as it addresses those NF characteristics in the design stage, when analyses can be performed, and there is room for changes while they are still not too costly. The use of modeldriven methodologies brings with them some intrinsic benefits, such as the increase in productivity, a greater reuse of design elements, or an improved maintainability of the system. This paper presents a development strategy that allows integrating non-functional security aspects (such as as confidentiality, integrity, or access control in embedded systems design. Palabras clave: Desarrollo Guiado por Modelos, Perfil de Dispositivos para Servicios Web, Pol’ıticas de

Cómo realizar una comunicación científica. Aspectos tipográficos (III

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Gutierrez Couto, U

2005-09-01

Full Text Available Resumen: El objetivo de este artículo es revisar los principales aspectos tipográficos para facilitar la legibilidad y la facilidad de lectura en la Web de un texto científico escrito.Abstract: The aim of this paper is review main typographical aspects to improve the legibility and readability of a scientific writing in the Web.

Aspectos sociopsicológicos del climaterio y la menopausia

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Dayana Couto Núñez

2014-10-01

Full Text Available El climaterio y la menopausia adquieren mayor trascendencia con el transcurso del tiempo. Al respecto, el concepto de calidad de vida se ha ido convirtiendo en un aspecto importante cuando la mujer climatérica se presenta ante el especialista, en busca de un mayor bienestar posible. En la edad mediana, el organismo se torna más frágil como consecuencia de las variaciones fisiológicas naturales del climaterio y la repercusión del contexto social sobre la persona, cuya sobrecarga física y mental favorece la aparición de procesos que deterioran la salud femenina y hacen más crítico el cuadro sintomático en este período, todo lo cual puede agravarse si existen un trastorno psicogénico previo y algunos elementos desfavorables del medio circundante

Aspectos claves-tiempo dependientes que amenazan la vida en el prehospitalario

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Patricio A. Cortés P., Dr.

2011-09-01

En esta misma perspectiva, la resolución de oportunidad y calidad se logra apuntando hacia los aspectos claves-tiempo dependientes que amenazan la vida del paciente, siendo estos clínicos (parocardiorespiratorio, compromiso de la vía aérea y la ventilación, compromiso de la perfusión tisular y el enfrentamiento al dolor torácico con su expresión máxima que es el síndrome coronario agudo, como también organizacionales (entre algunos la presencia de médicos en el Prehospitalario (Ph o el uso de determinados recursos sensibles como el traslado heliportado.

Assessment of wastewater and recycled water quality: a comparison of lines of evidence from in vitro, in vivo and chemical analyses.

Science.gov (United States)

Leusch, Frederic D L; Khan, Stuart J; Gagnon, M Monique; Quayle, Pam; Trinh, Trang; Coleman, Heather; Rawson, Christopher; Chapman, Heather F; Blair, Palenque; Nice, Helen; Reitsema, Tarren

2014-03-01

We investigated water quality at an advanced water reclamation plant and three conventional wastewater treatment plants using an "ecotoxicity toolbox" consisting of three complementary analyses (chemical analysis, in vitro bioanalysis and in situ biological monitoring), with a focus on endocrine disruption. The in vitro bioassays were chosen to provide an appropriately wide coverage of biological effects relevant to managed aquifer recharge and environmental discharge of treated wastewater, and included bioassays for bacterial toxicity (Microtox), genotoxicity (umuC), photosynthesis inhibition (Max-I-PAM) and endocrine effects (E-SCREEN and AR-CALUX). Chemical analysis of hormones and pesticides using LCMSMS was performed in parallel to correlate standard analytical methods with the in vitro assessment. For two plants with surface water discharge into open drains, further field work was carried out to examine in situ effects using mosquitofish (Gambusia holbrooki) as a bioindicator species for possible endocrine effects. The results show considerable cytotoxicity, phytotoxicity, estrogenicity and androgenicity in raw sewage, all of which were significantly reduced by conventional wastewater treatment. No biological response was detected to RO water, suggesting that reverse osmosis is a significant barrier to biologically active compounds. Chemical analysis and in situ monitoring revealed trends consistent with the in vitro results: chemical analysis confirmed the removal trends observed by the bioanalytical tools, and in situ sampling did not reveal any evidence of endocrine disruption specifically due to discharge of treated wastewater (although other sources may be present). Biomarkers of exposure (in vitro) and effect (in vivo or in situ) are complementary and together provide information with a high level of ecological relevance. This study illustrates the utility of combining multiple lines of evidence in the assessment of water quality. Copyright �

Presencia, tendencias y aspectos diferenciadores de la formación sobre derechos de autor en la alfabetización informacional a nivel universitario

OpenAIRE

Uribe Tirado, Alejandro

2010-01-01

Objetivo. Analizar la presencia de la temática de los derechos de autor, de los aspectos legales de la información académica y científica, en distintos programas, cursos o programas de aprendizaje de alfabetización informacional (ALFIN) de diferentes universidades alrededor del mundo, para identificar las tendencias y aspectos diferenciadores que se están presentando en la actualidad respecto a la formación en estas temáticas en relación con la información digital. También se a...

Los Derechos de admisión y permanencia en los partidos políticos : aspectos constitucionales

OpenAIRE

Escobar Roca, Guillermo

1993-01-01

En este trabajo se estudia un doble aspecto del Derecho de partidos (la admisión y permanencia en los mismos), seguramente no central, pero cuyo correcto tratarniento jurídico puede coadyuvar a la ruptura de la impermeabilidad característica de estas organizaciones, formalmente privadas pero que desempeñan funciones públicas.

Aspectos Farmacológicos y Socioculturales del consumo de hoja de coca en indígenas Koguis respecto al consumo de cocaína en ambientes urbanos

Directory of Open Access Journals (Sweden)

Katiuska Vera Zambrano

2002-07-01

Full Text Available La investigación compara los aspectos farmacológicos y socioculturales del consumo de la hoja de coca en indígenas Kogui de la Sierra Nevadade Santa Marta en Colombia frente a los aspectos farmacológicos y socioculturales del  consumo de cocaína en los ambientes urbanos, relacionados con los conceptos de tolerancia y dependencia a sustancias psicoactivas. Los resultados aportan al desarrollo  y diseño de programas de prevención, tratamiento y reducción de riesgo y daño en fármaco dependencia, al igual que sugiere la inclusión de aspectos relevantes en futuras políticas sociales de prevención en drogas.

Occurrence of biflavonoids in Clusiaceae: chemical and pharmacological aspects; Ocorrencia de biflavonoides em Clusiaceae: aspectos quimicos e farmacologicos

Energy Technology Data Exchange (ETDEWEB)

Ferreira, Rafaela Oliveira [Universidade Federal Rural do Rio de Janeiro, Seropedica, RJ (Brazil). Dept. de Quimica; Carvalho, Mario Geraldo de [Universidade Federal do Rio de Janeiro (NPPN/UFRJ), RJ (Brazil). Nucleo de Pesquisa em Produtos Naturais; Silva, Tania Maria Sarmento da, E-mail: mgeraldo@ufrrj.br [Universidade Federal Rural de Pernambuco, Recife, PE (Brazil). Dept. de Ciencias Moleculares

2012-07-01

This work describes the biflavonoids found in species of Clusiaceae, particularly the genera Garcinia and Calophyllum, emphasizing the importance of these metabolites as chemical markers of this family, their contribution to the pharmacological potential of these species, besides the promising potential of these compounds in the search for new drugs. (author)

Aspectos ultra-sonográficos da trombose da veia porta Ultrasonographic features of portal vein thrombosis

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Márcio Martins Machado

2006-04-01

Full Text Available A trombose da veia porta pode estar associada a várias alterações, como a presença de tumores (por exemplo: hepatocarcinoma, doença metastática hepática e carcinoma do pâncreas, pancreatite, hepatite, septicemia, trauma, esplenectomia, derivações porto-cava, estados de hipercoagulabilidade (por exemplo: gravidez, em neonatos (por exemplo: onfalite e cateterização da veia umbilical e desidratação aguda. Os autores discutem, neste artigo, os aspectos ultra-sonográficos da trombose de veia porta e alguns aspectos de relevância clínica.Portal vein thrombosis may be associated with many alterations, such as the presence of tumors (for example, hepatocellular carcinoma, metastatic liver disease and carcinoma of the pancreas as well as pancreatitis, hepatitis, septicemia, trauma, splenectomy, portacaval shunts, hypercoagulable conditions (for example, pregnancy, in neonates (for example, omphalitis and umbilical vein catheterization and in acute dehydration. The authors discuss herein the sonographic features of portal vein thrombosis as well as some aspects of clinical relevance.

Electron probe micro analyser chemical zircon ages of the Khetri granitoids, Rajasthan, India: records of widespread late palaeoproterozoic extension-related magmatism

International Nuclear Information System (INIS)

Kaur, Parampreet; Chaudhri, Naveen; Biju-Sekhar, S.; Yokoyama, K.

2006-01-01

A number of granitoid plutons were emplaced in the northernmost entity of the Aravalli craton, the Khetri Copper Belt (KCB). We report here Th-U-Pb electron probe micro analyser chemical ages for zircon and monazite from two granitoid plutons of the north KCB, the Biharipur and Dabla. Zircons occurring in the granitoids depict well-developed magmatic zoning and are chronologically unzoned. Both the plutons and their diverse granitoid facies are coeval and provide ages around 1765-1710 Ma. Geochemical attributes of the studied plutons are typical of A-type within-plate granites and consistent with an extensional tectonic environment. Our new age data are comparable to the petrologically similar A-type granitoids of the Alwar region, which have provided zircon chemical ages around 1780-1710 Ma. These analogous ages imply a widespread late palaeoproterozoic extension-related plutonism in the northern part of the Aravalli craton. The monazites, which were recovered only from the mafic magmatic rocks of the Biharipur pluton, yielded an isochron age of 910 ±10 Ma, signifying an over- print of a younger neoproterozoic thermal event in the region. (author)

Conceptual Chemical Process Design for Sustainability.

Science.gov (United States)

This chapter examines the sustainable design of chemical processes, with a focus on conceptual design, hierarchical and short-cut methods, and analyses of process sustainability for alternatives. The chapter describes a methodology for incorporating process sustainability analyse...

Plasma-chemical processes and systems

International Nuclear Information System (INIS)

Castro B, J.

1987-01-01

The direct applications of plasma technology on chemistry and metallurgy are presented. The physical fundaments of chemically active non-equilibrium plasma, the reaction kinetics, and the physical chemical transformations occuring in the electrical discharges, which are applied in the industry, are analysed. Some plasma chemical systems and processes related to the energy of hydrogen, with the chemical technology and with the metallurgy are described. Emphasis is given to the optimization of the energy effectiveness of these processes to obtain reducers and artificial energetic carriers. (M.C.K.) [pt

Finding Chemical Structures Corresponding to a Set of Coordinates in Chemical Descriptor Space.

Science.gov (United States)

Miyao, Tomoyuki; Funatsu, Kimito

2017-08-01

When chemical structures are searched based on descriptor values, or descriptors are interpreted based on values, it is important that corresponding chemical structures actually exist. In order to consider the existence of chemical structures located in a specific region in the chemical space, we propose to search them inside training data domains (TDDs), which are dense areas of a training dataset in the chemical space. We investigated TDDs' features using diverse and local datasets, assuming that GDB11 is the chemical universe. These two analyses showed that considering TDDs gives higher chance of finding chemical structures than a random search-based method, and that novel chemical structures actually exist inside TDDs. In addition to those findings, we tested the hypothesis that chemical structures were distributed on the limited areas of chemical space. This hypothesis was confirmed by the fact that distances among chemical structures in several descriptor spaces were much shorter than those among randomly generated coordinates in the training data range. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

Aspectos discursivos em As Bruxas de Salem: peça e filme

OpenAIRE

Pinheiro, Eder Sergio

2009-01-01

Esta pesquisa, cujo título é Aspectos Discursivos em As Bruxas de Salem: eça e Filme, propõe discutir a transposição da linguagem escrita, neste caso, as rubricas da peça de teatro para a linguagem fílmica, devido a problemática das duas linguagens se diferenciarem, convergirem-se e cruzarem-se ao mesmo tempo. Deste modo, dois fragmentos foram escolhidos para análise, sendo eles: um trecho da peça escrita As Bruxas de Salem (1953) e outro do filme (1976), ambos os trechos são correspondent...

CLIMATERIO Y POSTMENOPAUSIA: ASPECTOS EDUCATIVOS A CONSIDERAR SEGUN LA ETAPA DEL PERIODO

OpenAIRE

ARAYA GUTIERREZ,ALEJANDRA; URRUTIA SOTO,MARIA TERESA; CABIESES VALDES,BALTICA

2006-01-01

El periodo del climaterio es una etapa de transición en la vida de la mujer caracterizada por cambios físicos, psicológicos y sociales. Es una etapa dinámica marcada por la repercusión de los cambios hormonales, principalmente por la paulatina disminución de los estrógenos. La presente revisión bibliográfica describe las características generales del periodo, cambios que ocurren y aspectos a educar en las mujeres durante el climaterio y la postmenopausia, con el propósito de dar una visión ac...

Estudo dos aspectos éticos dos transplantes na América Latina

OpenAIRE

Virgínia Maria Coelho de Holanda; Francélia Loureiro Nery; Marta Barrozo Azevedo; Tânia Cristina Botelho Mendes

1994-01-01

Respeitando recomendações da OMS, foi feito estudo retrospectivo comparativo das Legislações de 16 Países da América Latina, a saber Argentina, Bolívia, Brasil, Colômbia, Costa Rica, Chile, Cuba, Equador, Guatemala, Honduras, México, Panamá, Paraguai, Peru, República Dominicana e Venezuela, do período de 1963 a 1992, enfatizando-se os aspectos éticos referentes a doação, determinação da morte, conflito de interesses, seleção do receptor, comercialização e intercâmbio internacional de órgãos. ...

Aspectos moleculares da anemia falciforme Molecular aspects for sickle cell anemia

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Gentil Claudino de Galiza Neto

2003-01-01

Full Text Available No presente artigo abordaram-se vários aspectos relacionados à natureza molecular da anemia falciforme, desordem hematológica de caráter hereditário que acomete expressivo número de indivíduos em várias regiões do mundo. As pesquisas realizadas em torno desta patologia da hemácia, ao longo de quase um século, a partir de 1910, cooperaram para a criação de um novo e importante segmento da ciência, denominado biologia molecular. A descoberta dos polimorfismos da mutação (GAT->GTG no gene que codifica a cadeia beta da hemoglobina, originando diferentes haplótipos da doença, permitiu um melhor e mais amplo conhecimento em torno da heterogeneidade clínica nos pacientes falcêmicos. Analisando a hemoglobina na sua estrutura normal e mutante, sua produção e evolução, pode-se ter um entendimento mais completo da fisiopatologia desta doença e da sua complexidade clínica.The present article dealt with various aspects related to molecular nature of sickle cell disease (SCD, a heritable hematology disorder that attacks a great number of people in different regions of the world. Researches done on red cell patology, in approximately half a century, starting since 1910, cooperated to gave origin a new branch of science called molecular biology. The discovery of mutation polymorphism (GAT -> GTC in the gene that codifies beta globin chain, give origin to different illness haplotypes, permitted a better and great knowledge about the clinic heterogeneity of the patients. Analysing hemoglobin in its normal and mutation structure as well as in its productions and evolution, one can have a complete understanding of the illness phisiopathology and its clinical complexity.

Mobile app for chemical detection

Science.gov (United States)

Klunder, Gregory; Cooper, Chadway R.; Satcher, Jr., Joe H.; Tekle, Ephraim A.

2017-07-18

The present invention incorporates the camera from a mobile device (phone, iPad, etc.) to capture an image from a chemical test kit and process the image to provide chemical information. A simple user interface enables the automatic evaluation of the image, data entry, gps info, and maintain records from previous analyses.

Provas da função pulmonar. Controlo de qualidade. Aspectos gerais (1a Parte

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J.M. Reis Ferreira

1999-07-01

Full Text Available RESUMO: Os autores procuraram neste artigo sensibilizar todos os que lidam de perto com a realização dos testes da função respiratória, para a importância da qualidade e dos meios disponiveis para conseguir o seu controlo. Foram deste modo encarados os diferentes factores intervenientes na qualidade, analisandoos de acordo com os dados fornecidos fundamentalmente pela experiência. Foram assim focados, neste primeiro artigo, apenas aspectos gerais trazidos pela prática do dia a dia, a que se seguirá a publicação de novo texto em que serão, dentro do mesmo âmbito, encaradas as diferentes técnicas actualmente usadas para a avaliação da Função Respiratória.REV PORT PNEUMOL 1999; V (4: 393-404 ABSTRACT: The authors claim for the importance of the quality control in order to assure clinically useful results and a well-functioning lung function laboratory, and analyse briefly the different general factors that could be involved in the lack of quality.REV PORTPNEUMOL 1999; V (4: 393-404 Key-words: Quality control, Equipment, Calibration, Accuracity, Colaboration, Palavras-chave: Controlo de qualidade, Equipamento, Calibração, Precisão, Exactidão;Colaboração

Savannah River Site RCRA Facility Investigation plan: Road A Chemical Basin

International Nuclear Information System (INIS)

1989-06-01

The nature of wastes disposed of at the Road A Chemical Basin (RACB) is such that some degree of soil contamination is probable. Lead has also been detected in site monitoring wells at concentrations above SRS background levels. A RCRA Facility Investigation (RFI) is proposed for the RACB and will include a ground penetrating radar (GPR) survey, collection and chemical and radiological analyses of soil cores, installation of groundwater monitoring wells, collection and chemical and radiological analyses of groundwater samples, and collection of chemical and radiological analyses of surface water and sediment samples. Upon completion of the proposed RFI field work and chemical and radiological analyses, and RFI report should be prepared to present conclusions on the nature and extent of contamination at the site, and to make recommendations for site remediation. If contamination is detected at concentrations above SRS background levels, a receptor analysis should be done to evaluate potential impacts of site contamination on nearby populations

Relacionamentos de Marketing em Empresas Varejistas: Aspectos Positivos e Negativos

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Cléria Donizete da Silva Lourenço

2013-09-01

Full Text Available O objetivo deste trabalho é compreender as relações de trocas comerciais sob a ótica dos clientes, funcionários e proprietários de empresas varejistas. A pesquisa, de natureza qualitativa, foi feita utilizando-se como método a etnografia. Os dados foram coletados em cinco empresas varejistas de um município de pequeno porte no Sul de Minas Gerais – um supermercado, uma farmácia, uma panificadora, um posto de combustíveis e uma loja de hortifrutigranjeiros – durante o período de um ano (dez/2008 a dez/2009. A observação participante e a entrevista em profundidade foram utilizadas como técnicas de coleta de dados. Para tratamento dos mesmos, utilizou-se a análise de conteúdo. Por meio da análise empreendida, identificou-se que os relacionamentos de marketing são compostos tanto por aspectos positivos quanto negativos. Contudo, os aspectos positivos são predominantes, especialmente pelo fato de que o cultivo de relacionamentos nas empresas varejistas analisadas é uma ocorrência natural, podendo, portanto, ser caracterizado como “genuíno”. Em termos teóricos, uma das principais descobertas feitas nesta pesquisa é que o relacionamento de marketing pode trazer também implicações negativas para as empresas confirmando as descobertas de Grayson and Ambler (1999 quando eles afirmam que o marketing de relacionamento pode trazer benefícios, mas também desvantagens inerentes. Em termos gerenciais, há que se ressaltar o papel fundamental que os funcionários exercem na construção de relacionamentos duradouros. Sendo assim, maior atenção deveria ser dispensada ao desenvolvimento de habilidades de relacionamentos daqueles que estão face a face com o cliente. DOI: 10.5585/remark.v12i3.2513

Chemical analysis of high purity graphite

International Nuclear Information System (INIS)

1993-03-01

The Sub-Committee on Chemical Analysis of Graphite was organized in April 1989, under the Committee on Chemical Analysis of Nuclear Fuels and Reactor Materials, JAERI. The Sub-Committee carried out collaborative analyses among eleven participating laboratories for the certification of the Certified Reference Materials (CRMs), JAERI-G5 and G6, after developing and evaluating analytical methods during the period of September 1989 to March 1992. The certified values were given for ash, boron and silicon in the CRM based on the collaborative analysis. The values for ten elements (Al, Ca, Cr, Fe, Mg, Mo, Ni, Sr, Ti, V) were not certified, but given for information. Preparation, homogeneity testing and chemical analyses for certification of reference materials were described in this paper. (author) 52 refs

El aspecto lúdico en la enseñanza del ELE

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Varela, Patricia

2010-10-01

Full Text Available Jugar y aprender son dos acciones íntimamente relacionadas, de forma que su complementación da lugar a un ambiente ameno en clase haciendo que el alumno se sienta más cómodo y abierto al aprendizaje. El objetivo de este artículo es analizar la importancia de la motivación en el alumno y los medios con los que contamos los docentes para desarrollarla de la forma más amena posible. Tendremos en cuenta la importancia del aspecto lúdico en la enseñanza del español como lengua extranjera y a la vez poner en práctica diversas posibilidades de aplicación del mismo

Miastenia grave: aspectos históricos Myasthenia gravis: historical aspects

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FRANCISCO MARCOS B. CUNHA

1999-06-01

Full Text Available Foram pesquisados aspectos históricos da miastenia grave desde as primeiras descrições da doença em 1672, pelo clínico inglês Thomas Willis. São descritas as dificuldades encontradas no manuseio dos primeiros pacientes diagnosticados. Pesquisaram-se fatos históricos ligados à investigação da doença, o tratamento, bem como curiosidades pouco citadas na literatura.We studied historical aspects of myasthenia gravis starting from its first description by the English physician, Sir Thomas Willis, in 1672. We also describe the difficulties in managing triating the first diagnosed patient. Historical facts related to the investigation and the initial treatment of this disorder as well as curiosities seldom mentioned in the literature are part of this paper.

Roman wall-painting technical aspects | Aspectos técnicos de la pintura mural romana | Aspectos técnicos de la pintura mural romana

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Lorenzo Abad Casal

1982-12-01

Full Text Available Se estudian diversos aspectos técnicos de la pintura mural romana: composición de los morteros, sistemas de unión entre las diversas capas, trazados previos, técnica pictórica y técnicas de conservación y restauración. Todo ello se plasma en una serie de gráficas que ilustran las técnicas romanas y su evolución a través de los siglos. | Etude des divers aspects techniques de la peinture murale romainne: composition des mortiers, systèmes d'union entre les différents couches, dessins préparatoires, technique de la peinture et procedés de conservation et de restauration. Un resumé sous forme graphique permet une vision synoptique de l'évolution des techniques de peinture romaine au cours des siècles.

Dor neuropática central após lesão medular traumática: capacidade funcional e aspectos sociais Dolor neuropático central después de lesión medular traumática: capacidad funcional y aspectos sociales Central neuropathic pain after traumatic spinal cord injury: functional capacity and social aspects

OpenAIRE

Janaina Vall; Violante Augusta Batista Braga

2005-01-01

Estudo de caso comparativo com o objetivo de avaliar a capacidade funcional e os aspectos sociais de dois pacientes, ambos com lesão medular traumática, sem e com dor neuropática central associada, respectivamente. Para avaliar a capacidade funcional, foi utilizado como instrumento o Functional Independence Measure ou Escala de Independência Funcional. E para avaliar os aspectos sociais foi construído o ecomapa de cada paciente, preconizado pelo modelo Calgary de avaliação de famílias. Ambos ...

BIOÉTICA Y DISCAPACIDAD PSIQUIÁTRICA: ASPECTOS CLÍNICOS Y JURÍDICOS BIOETICA E INCAPACIDADE PSIQUIÁTRICA: ASPECTOS CLÍNICOS E JURÍDICOS BIOETHICS AN PSYCHIATRIC DISSABILITY: CLINICAL AND JURIDICAL APECTS

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Laura Rueda Castro

2003-01-01

Full Text Available La presente monografía busca establecer un nexo interdisciplinario entre la bioética y los aspectos clínicos y jurídicos que se conectan en la atención, protección y rehabilitación de las personas afectadas por enfermedades psiquiátricas. El análisis se centra en aquellas personas adultas, privadas de razón como consecuencia de un proceso psicopatológico, titulares de todos sus derechos civiles, pero que, por motivos de la enfermedad, se encuentran con dificultades para ejercerlosA presente monografia busca estabelecer nexo interdisciplinar entre bioética e aspectos clínicos e jurídicos na atenção, proteção e reabilitação de pessoas portadoras de enfermidades psiquiátricas. A análise é centrada em pacientes adultos privados de razão em decorrência de processo psicopatológico, titulares de todos direitos civis, mas que, em função da enfermidade, encontram-se em dificuldades para exercê-losThis monography seeks to establish an interdisciplinary link between bioethics and the clinical and juridical aspects that connect with attention, protection and rehabilitation of persons with psychiatric illness. The analysis is centered those adults, on deprived of reasoning because of a psycopathologic process, entitled to civil rights, but with dificulties to exercise them due to their illness

Effort problem of chemical pipelines

Energy Technology Data Exchange (ETDEWEB)

Okrajni, J.; Ciesla, M.; Mutwil, K. [Silesian Technical University, Katowice (Poland)

1998-12-31

The problem of the technical state assessment of the chemical pipelines working under mechanical and thermal loading has been shown in the paper. The pipelines effort after the long time operating period has been analysed. Material geometrical and loading conditions of the crack initiation and crack growth process in the chosen object has been discussed. Areas of the maximal effort have been determined. The material structure charges after the long time operating period have been described. Mechanisms of the crack initiation and crack growth in the pipeline elements have been analysed and mutual relations between the chemical and mechanical influences have been shown. (orig.) 16 refs.

Vascugraft polyurethane arterial prosthesis as femoro-popliteal and femoro-peroneal bypasses in humans: pathological, structural and chemical analyses of four excised grafts.

Science.gov (United States)

Zhang, Z; Marois, Y; Guidoin, R G; Bull, P; Marois, M; How, T; Laroche, G; King, M W

1997-01-01

Following positive results obtained in in vitro studies and in vivo implantations in animals, a clinical trial using the Vascugraft polyurethane arterial prosthesis as a below-knee substitute was undertaken in 15 patients. Eight grafts became occluded during the first year, and segments from four of them were explanted and made available for pathological, structural and chemical investigations. The implantation periods ranged from 21 to 358 days. Failures were associated with kinking (one case), possible anastomotic mismatch between the graft and the artery (one case), and poor run-off (two cases). No organized collagenous internal encapsulation was noted; however, endothelial-like cells were observed at the anastomotic site of one graft. No significant structural degradation of the prostheses was observed in those grafts implanted for 21, 38 and 46 days. Some deteriorations in the fibrous structure were observed on the external surface of the prosthesis implanted for 358 days. High-resolution carbon C1s analysis by ESCA demonstrated a 60 to 80% decrease in carbonate content on the surface of all explanted prostheses. Chemical analyses of each polyurethane graft by IR, SEC and DSC revealed no significant chemical changes. The clinical performance of the Vascugraft prosthesis for below-knee implantation proved to be no more impressive than that of expanded polytetrafluorethylene, the currently accepted reference. The decision by B. Braun Melsungen AG to end this program is therefore to be regarded as highly professional.

Depressão na infância e adolecência: aspectos sociais

OpenAIRE

Lúcia Helena Siqueira Barbosa

1987-01-01

Este trabalho contém três partes. Uma primeira intitulada Introdução. Uma segunda focalizada sob o título de Material Clínico :apresentação, comentários e considerações sobre a prática do Serviço Social e, uma terceira, Considerações Finais. A primeira tenta discutir dois pontos: - algumas considerações sobre o conceito de depressão na infância e adolescência: caracterização de quadros clínicos com aspectos depressivos nítidos, mais ou menos "puros" e de "reações depressivas", em que tais asp...

Estudo dos aspectos éticos dos transplantes na América Latina

Directory of Open Access Journals (Sweden)

Virgínia Maria Coelho de Holanda

1994-06-01

Full Text Available Respeitando recomendações da OMS, foi feito estudo retrospectivo comparativo das Legislações de 16 Países da América Latina, a saber Argentina, Bolívia, Brasil, Colômbia, Costa Rica, Chile, Cuba, Equador, Guatemala, Honduras, México, Panamá, Paraguai, Peru, República Dominicana e Venezuela, do período de 1963 a 1992, enfatizando-se os aspectos éticos referentes a doação, determinação da morte, conflito de interesses, seleção do receptor, comercialização e intercâmbio internacional de órgãos.

Aproximación Neuropsicológica al Constructo de Empatía: Aspectos Cognitivos y Neuroanatómicos

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Vanessa Arán Filippetti

2012-01-01

Full Text Available Los modelos integradores definen a la empatía como un constructo multidimensional que incluye aspectos afectivos (EA; empatía afectiva y aspectos cognitivos (EC; empatía cognitiva. El objetivo del presente trabajo es exponer el estado del arte de la asociación entre la empatía y las funciones ejecutivas (FE y tratar de proponer una integración de las ideas al respecto. Para esto, se adopta un marco conceptual y se revisan estudios que conciben a la EA y a la EC como aspectos complementarios pero diferenciados tanto desde el punto de vista funcional como neurobiológico; ambos componentes se activarían conjuntamente durante la interacción social, pero podrían actuar por separado tal como se evidencia, por ejemplo, en el daño cerebral y en la psicopatología. Desde una perspectiva multidimensional, la relación empatía-FE podría explicarse a partir de la relación ECfTeoría de la MenteFE, así como mediante un modelo que admita la influencia de procesos top-down - a través de funciones ejecutivas - en el proceso empático. Adoptar una visión multidimensional de la empatía no sólo es relevante desde el punto de vista funcional, sino que aporta evidencia significativa para el diagnóstico, la evaluación y la comprensión del déficit empático en la clínica neurológica y psiquiátrica.

Chemical process hazards analysis

Energy Technology Data Exchange (ETDEWEB)

NONE

1996-02-01

The Office of Worker Health and Safety (EH-5) under the Assistant Secretary for the Environment, Safety and Health of the US Department (DOE) has published two handbooks for use by DOE contractors managing facilities and processes covered by the Occupational Safety and Health Administration (OSHA) Rule for Process Safety Management of Highly Hazardous Chemicals (29 CFR 1910.119), herein referred to as the PSM Rule. The PSM Rule contains an integrated set of chemical process safety management elements designed to prevent chemical releases that can lead to catastrophic fires, explosions, or toxic exposures. The purpose of the two handbooks, ``Process Safety Management for Highly Hazardous Chemicals`` and ``Chemical Process Hazards Analysis,`` is to facilitate implementation of the provisions of the PSM Rule within the DOE. The purpose of this handbook ``Chemical Process Hazards Analysis,`` is to facilitate, within the DOE, the performance of chemical process hazards analyses (PrHAs) as required under the PSM Rule. It provides basic information for the performance of PrHAs, and should not be considered a complete resource on PrHA methods. Likewise, to determine if a facility is covered by the PSM rule, the reader should refer to the handbook, ``Process Safety Management for Highly Hazardous Chemicals`` (DOE- HDBK-1101-96). Promulgation of the PSM Rule has heightened the awareness of chemical safety management issues within the DOE. This handbook is intended for use by DOE facilities and processes covered by the PSM rule to facilitate contractor implementation of the PrHA element of the PSM Rule. However, contractors whose facilities and processes not covered by the PSM Rule may also use this handbook as a basis for conducting process hazards analyses as part of their good management practices. This handbook explains the minimum requirements for PrHAs outlined in the PSM Rule. Nowhere have requirements been added beyond what is specifically required by the rule.

The dilemma in prioritizing chemicals for environmental analysis: known versus unknown hazards.

Science.gov (United States)

Anna, Sobek; Sofia, Bejgarn; Christina, Rudén; Magnus, Breitholtz

2016-08-10

A major challenge for society is to manage the risks posed by the many chemicals continuously emitted to the environment. All chemicals in production and use cannot be monitored and science-based strategies for prioritization are essential. In this study we review available data to investigate which substances are included in environmental monitoring programs and published research studies reporting analyses of chemicals in Baltic Sea fish between 2000 and 2012. Our aim is to contribute to the discussion of priority settings in environmental chemical monitoring and research, which is closely linked to chemical management. In total, 105 different substances or substance groups were analyzed in Baltic Sea fish. Polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans (PCDD/Fs) and polychlorinated biphenyls (PCBs) were the most studied substances or substance groups. The majority, 87%, of all analyses comprised 20% of the substances or substance groups, whereas 46 substance groups (44%) were analyzed only once. Almost three quarters of all analyses regarded a POP-substance (persistent organic pollutant). These results demonstrate that the majority of analyses on environmental contaminants in Baltic Sea fish concern a small number of already regulated chemicals. Legacy pollutants such as POPs pose a high risk to the Baltic Sea due to their hazardous properties. Yet, there may be a risk that prioritizations for chemical analyses are biased based on the knowns of the past. Such biases may lead to society failing in identifying risks posed by yet unknown hazardous chemicals. Alternative and complementary ways to identify priority chemicals are needed. More transparent communication between risk assessments performed as part of the risk assessment process within REACH and monitoring programs, and information on chemicals contained in consumer articles, would offer ways to identify chemicals for environmental analysis.

Modelo integral de productividad, aspectos importantes para su implementación

Directory of Open Access Journals (Sweden)

Jorge Eduardo Medina Fernández de Soto

2010-08-01

Full Text Available El Modelo Integral busca la optimización de la productividad, a partir de los objetivos estratégicos empresariales y el análisis y mejoramiento de la propuesta de valor para el cliente, identificando el nivel de operación óptimo y los recursos tangibles realmente necesarios. También identifica los procesos empresariales de creación de valor y es una guía hacia el desarrollo de la propuesta de valor. Además, analiza las inversiones necesarias para las nuevas propuestas de valor, buscando un crecimiento estratégico sostenible. El artículo explica en primer lugar los fundamentos y componentes del modelo y luego algunos aspectos importantes para su implementación.

La actitud crítica un aspecto fundamental en la educación

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Eduard Mauricio Wong Jaramillo

2016-03-01

Full Text Available En este artículo se reflexiona sobre el papel de la actitud crítica en la educación, dado que la capacidad de pensar por sí mismo y decidir de acuerdo con criterios racionales son aspectos decisivos que todo estudiante debe desarrollar, con el fin de propiciar sujetos que evalúen el saber. Otra razón que la hace necesaria es que la enseñanza pretende incentivar la formación de personas autónomas, que participen activamente en la vida política, social y cultural, aspectos que implican el ejercicio crítico y reflexivo. En la primera parte del documento se presentan algunos rasgos que identifican a la educación crítica, en tanto modelo que propende por formar seres humanos que piensen por sí mismos. Luego, se indaga acerca del fomento de prácticas educativas que permiten el desarrollo de competencias lógicas y argumentativas dado que la actitud crítica implica una evaluación racional. Por último, se resalta el papel de la filosofía y de la ciencia, pues en ellas se promueven deliberaciones sobre problemas teóricos y prácticos. En conclusión, la necesidad de estimular la actitud crítica es un elemento prioritario que la educación debe tener en cuenta, si lo que desea es promover seres humanos y sociedades que enfrenten de forma racional los problemas actuales

Aspectos morfológicos da placenta da preguiça, Bradypus variegatus Shinz, 1825

OpenAIRE

Marleyne José Afonso Accyoli Lins Amorin; Maria Angélica Miglino; Adelmar Afonso Amorin Júnior; Tatiana Carlesso dos Santos

2003-01-01

Estudaram-se os aspectos morfológicos da placenta e das membranas fetais de 03 placentas de bichos-preguiça (Bradypus variegatus), adultas e prenhes, originárias da Zona da Mata do Estado de Pernambuco. Essas estruturas foram obtidas de 03 fêmeas doadas pela Universidade Federal de Pernambuco, das quais duas encontravam-se congeladas e a terceira foi colhida mediante realização de cirurgia cesariana, onde mãe e feto foram preservados. Depois de descongeladas, as placentas foram fixadas em sol...

La dispepsia funcional: Aspectos biopsicosociales, evaluación y terapia psicológica

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Stefano Vinaccia Alpi

2008-09-01

Full Text Available Se abordan los aspectos conceptuales del trastorno gastrointestinal Dispepsia funcional (DP, en lo que se refiere a su definición, prevalencia, clasificación y diagnóstico.; las causas y consecuencias de la DF desde una perspectiva biopsicosocial (variables socioeconómicas, demandas psicosociales, evaluación cognitiva y estrategias de afrontamiento, personalidad y comportamiento, mecanismos psicobiológicos, calidad de vida, tratamiento y evolución; la evaluación psicológica de la DF desde la perspectiva procesual; y la intervención psicológica, con énfasis en el enfoque cognitivo conductual.

Refractometry and interferometry in chemical analysis; Refractometrie et interferometrie en analyse chimique

Energy Technology Data Exchange (ETDEWEB)

Veret, C [Faculte des Sciences de Paris, 75 (France)

2000-03-01

In vacuum, an electromagnetic radiation is propagated at a constant velocity. But, when it has to pass through a physical medium, it is submitted to different interactions (for instance: absorption, diffusion, refraction, polarization, dispersion, fluorescence) which lead to a modification of its propagation. In the frequency ranges of the radiation for which the absorption is not very important, the modifications of the propagation velocity of a radiation can bring data on the nature and/or the physical conditions (pressure, temperature) of a medium, whatever its state be: gas, liquid or solid. Thus, the absolute refractive index of a medium in relation to vacuum is defined as the ratio c/v of the propagation velocity c of a monochromatic electromagnetic radiation in vacuum at its velocity v in this medium. The photonic refractometry (field of ultraviolet, visible and infrared radiations) is the set of the measure techniques of the refractive indexes having a role in chemical analysis. The refractometry measures can only be applied to media which are optically transparent. After having described these techniques, the author presents their uses in chemical analysis. (O.M.)

Cooling tower wood sampling and analyses: A case study

International Nuclear Information System (INIS)

Haymore, J.L.

1985-01-01

Extensive wood sampling and analyses programs were initiated on crossflow and counterflow cooling towers that have been in service since 1951 and 1955, respectively. Wood samples were taken from all areas of the towers and were subjected to biological, chemical and physical tests. The tests and results for the analyses are discussed. The results indicate the degree of wood deterioration, and areas of the towers which experience the most advanced degree of degradation

Statistical Data Analyses of Trace Chemical, Biochemical, and Physical Analytical Signatures

Energy Technology Data Exchange (ETDEWEB)

Udey, Ruth Norma [Michigan State Univ., East Lansing, MI (United States)

2013-01-01

Analytical and bioanalytical chemistry measurement results are most meaningful when interpreted using rigorous statistical treatments of the data. The same data set may provide many dimensions of information depending on the questions asked through the applied statistical methods. Three principal projects illustrated the wealth of information gained through the application of statistical data analyses to diverse problems.

Aspectos psicosociales del embarazo en la adolescencia, año 2000

Directory of Open Access Journals (Sweden)

Elena Ávila Gálvez

2002-12-01

Full Text Available Se realizó un estudio explicativo-observacional, de tipo estudio de casos y controles, en adolescentes entre 10 y 19 años, del sexo femenino, provenientes del Policlínico Docente "Wilfredo Pérez Pérez", en el año 2000, compartidos en 2 grupos: el estudio, con 53 casos que se embarazaron, y el control con 106 adolescentes que no lo hicieron. Se compararon diferentes aspectos de la sexualidad, esfera familiar y sociodemográficos, con el fin de determinar la influencia de algunos aspectos psicosociales del embarazo en la adolescencia. La mayoría de las adolescentes del grupo estudio se incluían en la adolescencia tardía, con inestabilidad en la pareja, mejor nivel de instrucción de los padres, mayor porcentaje que no estudiaba ni trabajaba, con padres divorciados, criadas solamente por la madre, de familias disfuncionales, con inicio precoz de la actividad sexual sin anticonceptivos, con problemas psicológicos que se enmarcaban en el hogar y la familia.An explanatory-observational case-control type-study was performed on female adolescents aged 10-19 years from "Wilfredo Pérez Pérez Teaching Polyclinics in the year 2000. They were divided into two groups: the study group comprising 53 pregnant patients and the control group including 106 adolescents who were not pregnant. Several aspects related to sexuality, family environment and also socio-demographic questions were compared to determine the impact of some psychosocial aspects of pregnancy in adolescence. Most of the adolescents in the study group were in their late adolescence, they had no permanent partner, their parents had a higher level of education; a high number of them neither studied nor worked, their parents were mostly divorced, they were raised by their mothers only, they were from dysfunctional families, with early beginning of sexual intercourse without contraceptives and psychological problems involving the family and the house.

Aspectos médicos, genéticos y psicosociales del síndrome Usher

OpenAIRE

Dyce Gordon, Elisa; Mapolón Arcendor, Yolanda; Santana Álvarez, Jorge

2011-01-01

Fundamento: el síndrome Usher es una enfermedad genética, que se caracteriza por hipoacusia neurosensorial progresiva bilateral congénita, pérdida de visión debida a la retinosis pigmentaria y en ocasiones presenta también trastornos vestibulares. Objetivo: describir los principales aspectos médicos, genéticos y psicosociales presentes en los pacientes con síndrome Usher. Método: se realizó un estudio descriptivo transversal en 14 pacientes con diagnóstico de síndrome Usher atendidos en el Ce...

Conjecturas da Epistemológia Jurídica e Aspectos da Teoria da Linguagem

OpenAIRE

Oliveira, Rita de Cássia Cartelli de; Cesumar; Motta, Ivan Dias; Cesumar

2008-01-01

Apresentar-se-ão reflexões em torno da epistemologia jurídica e alguns aspectos da teoria da linguagem; a necessidade de acompanhamento e aprimoramento da linguagem jurídica, para que o direito não se distancie da realidade, mantendo-se apenas como um sistema do status quo; uma breve análise de algumas teorias da ciência do direito e da linguagem; as especificidades dos termos lingüísticos para a análise da ciência do direito, pautada na contemporaneidade sob a perspectiva humanista, buscando...

Aspectos da aposentadoria por tempo de serviço nos estados-partes do Mercosul

OpenAIRE

Oliveira, Aldemir de.

2008-01-01

Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências Jurídicas. Programa de Pós-Graduação em Direito. O objeto desta tese são os aspectos da Aposentadoria por tempo de serviço nos Estados-Partes do MERCOSUL. A escolha do tema é dar uma contribuição jurídica, para que os trabalhadores mercosulinos, em especial argentinos, paraguaios e uruguaios, na qualidade de segurados obrigatórios, por prestarem, ou terem prestado serviços, nesses territórios, e sujeitos à legis...

ASPECTOS SEMÁNTICOS EN LOS ENTORNOS VIRTUALES DE FORMACIÓN

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Ana Vanessa Leguízamo León

2010-07-01

Full Text Available La semántica es un elemento necesario en cualquier actividad de aprendizaje, independientemente del contexto en el que nos encontremos. Los entornos virtuales de formación, como instituciones sociales mediadas por tecnología, tienen también una semántica asociada, que muchas veces es poco valorada por las personas que los diseñan. El componente semántico en estos entornos facilita la negociación de significados, que debe ocurrir para que los estudiantes puedan apropiarse de conocimiento y asociarlo con alguno de los patrones semánticos que ya posee, o crear uno nuevo. Se muestran aquí los aspectos semánticos que deben estar presentes en los entornos virtuales de formación, para situar al estudiante en el contexto semántico propuesto por el docente y que lo conduzca a un aprendizaje significativo.

Aspectos biológicos y control de un gracilláriido (Gracillariidae: Lepidóptera) en Caesalpinia spinosa (Mol.) Kuntze (1898), en Cajamarca, Perú

OpenAIRE

Murga Orrillo, Hipólito; Abanto Rodriguez, Carlos; Polo Vargas, Ana Rosa

2016-01-01

Se tuvo por objetivo determinar aspectos biológicos, identificar enemigos naturales, y establecer periodos oportunos de control de un gracillariido plaga de tara. Los aspectos biológicos y los enemigos naturales se evaluaron en campo y en laboratorio, los periodos oportunos de control se determinó por interacción hospedero-plaga. Los resultados, el huevo dura 7,8 días y mide 0,34x0,21mm; la larva presenta 4 instares y dura 35,7 días, variando de medidas entre 1o y 4o instar de 0,09 a 0,65 mm ...

Importancia de los aspectos psicosociales en la enfermedad celíaca

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Trini Fragoso Arbelo

2002-06-01

Full Text Available Se revisan los conceptos clínicos actuales sobre la enfermedad celíaca. Se definen con precisión los términos enfermedad celíaca activa, silente, latente y potencial. Se enfatiza en los aspectos psicosociales que influyen en su tratamiento y se trazan pautas generales acerca del manejo integral de los pacientes afectados, dada la importancia de la dieta sin gluten de por vida como único tratamiento.The current clinical concepts of celiac disease are reviewed. The terms active, silent, latent and potential related to celiac disease are accurately defined. Emphasis is made on the psychosocial aspects influencing its treatment and general guidelines are drawn on the comprehensive management of the patients suffering from this disease, given the importance of diet without gluten as the only lifelong treatment.

Chemical and mineralogical analyses of Roman amphorae from Augustan period recovered at the production center of Sant Antoni de Calonge (Gerona, Spain)

International Nuclear Information System (INIS)

Vila Socias, L.; Prats Pico, N.; Buxeda Garrigos, J.

2016-01-01

Amphorae were the most popular transport vessels used to ship wine and other commodities in Antiquity. This paper reports the results of the analyses of 38 samples of several Roman amphorae types recovered at Calonge (Gerona, Spain). Chemical composition of individuals have been obtained by means of XRF. Equivalent firing temperatures have been estimated by XRD and further refiring experiments have been performed. The results suggest the existence of two different clay pastes among individuals analyzed, most of which were fired at the range 900-1000 degree centigrade. Moreover, it is argued that craftsmen did not follow highly standardized paste preparation process during the first activity period of the workshop. The results are discussed in terms of production technology and standardization. (Author)

Procedures for field chemical analyses of water samples

International Nuclear Information System (INIS)

Korte, N.; Ealey, D.

1983-12-01

A successful water-quality monitoring program requires a clear understanding of appropriate measurement procedures in order to obtain reliable field data. It is imperative that the responsible personnel have a thorough knowledge of the limitations of the techniques being used. Unfortunately, there is a belief that field analyses are simple and straightforward. Yet, significant controversy as well as misuse of common measurement techniques abounds. This document describes procedures for field measurements of pH, carbonate and bicarbonate, specific conductance, dissolved oxygen, nitrate, Eh, and uranium. Each procedure section includes an extensive discussion regarding the limitations of the method as well as brief discussions of calibration procedures and available equipment. A key feature of these procedures is the consideration given to the ultimate use of the data. For example, if the data are to be used for geochemical modeling, more precautions are needed. In contrast, routine monitoring conducted merely to recognize gross changes can be accomplished with less effort. Finally, quality assurance documentation for each measurement is addressed in detail. Particular attention is given to recording sufficient information such that decisions concerning the quality of the data can be easily made. Application of the procedures and recommendations presented in this document should result in a uniform and credible water-quality monitoring program. 22 references, 4 figures, 3 tables

Aspectos éticos e estratégias para a participação voluntária da criança em pesquisa Aspectos éticos y estrategias para la participación voluntaria de niños en la investigación Ethical issues and strategies for the voluntary participation of children in research

Directory of Open Access Journals (Sweden)

Cecília Helena de Siqueira Sigaud

2009-12-01

Full Text Available A literatura de saúde tem abordado os aspectos éticos da investigação com seres humanos há décadas, mas ainda há desafios a serem reconhecidos e superados, tais como os referentes à pesquisa com crianças. Este artigo apresenta e discute aspectos éticos da pesquisa com crianças. Descreve estratégias de abordagem conformes às necessidades infantis, segundo seu processo de desenvolvimento e características individuais, para garantir a participação voluntária da criança na pesquisa.La literatura de salud ha tratado de los aspectos éticos de la investigación con seres humanos hace décadas, pero aun hay retos que deben ser reconocidos y superados, tales como los referentes a la investigación con la población infantil. Este artículo presenta y discute aspectos éticos de la investigación con niños y niñas. Describe estrategias de abordaje adecuadas a las necesidades infantiles, según su proceso de desarrollo y características individuales, para garantizar la participación voluntaria de niños y niñas en investigaciones.Ethical issues about research with human beings have been addressed in health literature since decades. In spite of this, it is necessary to enhance actions to face many challenges, like the ones related to investigation of childhood. This paper presents and discusses ethical issues in research with children. It describes some strategies to perform with children, considering their developmental process and individual characteristics, in order to guarantee their voluntary participation in research.

Lipids: From Chemical Structures, Biosynthesis, and Analyses to Industrial Applications.

Science.gov (United States)

Li-Beisson, Yonghua; Nakamura, Yuki; Harwood, John

2016-01-01

Lipids are one of the major subcellular components, and play numerous essential functions. As well as their physiological roles, oils stored in biomass are useful commodities for a variety of biotechnological applications including food, chemical feedstocks, and fuel. Due to their agronomic as well as economic and societal importance, lipids have historically been subjected to intensive studies. Major current efforts are to increase the energy density of cell biomass, and/or create designer oils suitable for specific applications. This chapter covers some basic aspects of what one needs to know about lipids: definition, structure, function, metabolism and focus is also given on the development of modern lipid analytical tools and major current engineering approaches for biotechnological applications. This introductory chapter is intended to serve as a primer for all subsequent chapters in this book outlining current development in specific areas of lipids and their metabolism.

Tres reformas educativas europeas: Reino Unido, Francia y España: aspectos comparativos.

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Inmaculada Egido Gálvez

1997-01-01

Full Text Available Desde una perspectiva unicamente aproximativa, este trabajo lleva a cabo un breve repaso de las reforrnas realizadas en los ultimos afios en el sistema educativo de tres paises europeos: Reino Unido, Francia y Espana. Tras la consideracion de los principales cambios introducidos por las leyes de reforma en relaci6n con la estructura del sistema, el curriculum, el profesorado y el gobiemo y la administraci6n de la educacion, se presenta lavaloraci6n crftica de algunos de los aspectos mas relevantes de las reformas. Por ultimo, se realizan algunas reflexiones globales derivadas de la comparaci6n entre los tres casos tratados

Equilibrio liquido-liquido-vapor de misturas ternarias : algoritimo de calculo e aspectos termodinamicos

OpenAIRE

Maria Helena Cano de Andrade

1991-01-01

Resumo: Este trabalho é uma contribuição ao estudo de processos de separação envolvendo fases em equilibrio liquido-liquido-vapor. Os seguintes aspectos são abordados: (1) desenvolvimento de um algoritmo eficiente de cálculo de flash liquido-liquido-vapor e sua aplicação para gerar diagramas de fases e em cálculos de destilação; (2) avaliação da utilização de parâmetros binários do modelo UNIQUAC obtidos de dados bifásicos em cálculos trifásicos de misturas ternárias; (3) medidas experimentai...

VIABILIDADE ECONÔMICA DE PROJETOS E ASPECTOS PARTICULARES EM EMPREENDIMENTOS TIPO PROJECT FINANCE APLICADOS A INVESTIMENTOS MEDIANTE PARCERIA PÚBLICO-PRIVADA EM INFRAESTRUTURA DE TRANSPORTES

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Alexandre da Costa Pereira

2013-01-01

Full Text Available O artigo tem por objetivo destacar aspectos relacionados com a análise da viabilidade de projetos de infraestrutura de transportes, aplicados a estudos de ampliação de capacidade de sistemas de transporte, sendo destacado no trabalho o aspecto da relevante importância da participação da iniciativa privada como parceira nos investimentos em infraestrutura. São abordados os métodos e estudos de viabilidade técnica e econômica, empréstimos, financiamentos e aspectos particulares a estudos para avaliação de projetos na área de infraestrutura de transportes. Como método para a avaliação de viabilidade financeira de projetos de concessões em investimentos em infraestrutura foi escolhido o Project Finance, tanto por seu potencial para a obtenção de parâmetros fundamentais para a tomada de decisão sobre alternativas de investimento, notadamente em projetos que considerem a participação privada como importante na viabilização do projeto, como para a análise de fatores intervenientes no risco de um investimento em obras de infraestrutura de transportes.

Transtornos alimentares: o papel dos aspectos culturais no mundo contemporâneo Transtornos alimentarios: el papel de los aspectos culturales en el mundo contemporáneo Eating disorders: the role of cultural aspects in the contemporary world

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Leticia Langlois Oliveira

2010-09-01

Full Text Available Os transtornos alimentares são patologias caracterizadas primordialmente pelo medo mórbido de engordar. Vários são os fatores envolvidos tanto na etiologia quanto na manutenção e na gravidade dessas doenças, principalmente fatores individuais, familiares e culturais. Em relação a estes últimos, salienta-se o papel dos aspectos históricos, estéticos, midiáticos, transculturais, socioeconômicos, raciais e de gênero. Pesquisas atuais realizadas em diversas culturas demonstram a existência de uma relação entre esses fatores e os índices de anorexia nervosa e bulimia nervosa. A busca por um padrão estético globalizado (magreza, segundo a literatura, tem um papel central no aumento do número de casos. O objetivo deste artigo é apresentar uma discussão teórica acerca dos aspectos culturais envolvidos no aumento do número de casos de transtornos alimentares. Este trabalho pretende também destacar a necessidade de que profissionais de diversas áreas estejam atentos para os perigos do padrão de beleza atual, a fim de potencializar intervenções preventivas.Los transtornos alimentarios son patologías caracterizadas primordialmente por el miedo mórbido de engordar. Varios son los factores involucrados ya sea en la etiología cuanto en la manutención y en la gravedad de esas enfermidades: individuales, familiares y culturales. Con relación a esos últimos, se resalta el papel de los aspectos históricos, estéticos, midiáticos, transculturales, socio económicos, raciales y de género. Investigaciones actuales realizadas en diferentes culturas muestran la existencia de una relación entre esos factores y los índices de anorexia nervosa y bulimia nervosa. El objetivo de ese artículo es presentar una discusión a cerca de los aspectos culturales involucrados en el aumento del número de casos de transtornos alimentarios. Ese trabajo pretende también destacar la necesidad de que profesionistas de diversas áreas estean

Aspectos socioeconómicos y familiares asociados en niños y adolescentes obesos

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William José González Cabriles

2013-01-01

Full Text Available El estudio es transversal y correlacional donde se analizaron las variables socioeconómicas y familiares de una muestra no probabilística, constituida por 528 familias de niños con obesidad exógena, de 2 a 18 años, provenientes de diversos sectores del país, atendidos en la consulta de primera del Centro de Atención Nutricional Infantil Antímano. El objetivo fue determinar los aspectos socioeconómicos y familiares asociados en niños y adolescentes con obesidad que asistieron al Centro. Los datos se procesaron con el programa SPSS 9.0. Se analizaron las distribuciones de frecuencias y el estadístico Chi-cuadrado para probar asociación entre las variables. El nivel de significancia fue 95%. En las familias de niños obesos se encontró que la mayoría de los jefes de familia eran obesos; las familias con pobreza extrema y la población infantil mayor de 15 años presentaron mayor sedentarismo; por último, las madres en general no participaron en la toma de decisiones en la compra de alimentos y no poseían nociones de alimentación equilibrada que les permitieran planificar la compra de alimentos. Estos aspectos se erigen como claves para ser abordados y resueltos por el trabajador social durante la intervención con el fin de favorecer la recuperación nutricional del niño obeso y su familia.

Aspectos psicológicos en el cáncer ginecológico

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María Eugenia Olivares Crespo

2004-01-01

Full Text Available En el presente trabajo se abordan los aspectos psicológicos concomitantes a la patologíaoncológica ginecológica. De forma habitual estas pacientes están sometidas a diferentes modalidadesterapéuticas que provocan efectos acumulativos. En términos generales, el tratamiento deelección es quirúrgico, principalmente mastectomía e histerectomía. Estos tratamientos quirúrgicosprovocan efectos antes, durante y después de los mismos. Entre los que cabe citar: alteraciones sexuales, cambios en la imagen corporal, infertilidad y menopausia inducida. Para concluir, seespecifican los procedimientos terapéuticos psicológicos del proceso, tanto del diagnóstico como deltratamiento quirúrgico y de los efectos derivados del mismo.

Aspectos do Desenvolvimento Político e Econômico da Guyana

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Iuri Cavlak

2014-07-01

Full Text Available Este artigo visa analisar alguns aspectos do desenvolvimento político e econômico da Guyana, pequeno país sul-americano situado no extremo norte do subcontinente. Tendo seu passado ligado a Holanda e a Inglaterra, a Guyana só conquistou sua independência em 1966, num contexto de avanço dos movimentos sociais, empolgados na construção de uma nova nação, e oposição dos Estados Unidos, tentando frear a difusão das ideias socialistas e o apego da política externa guianense ao bloco soviético. A busca por uma economia nacionalizada e planejada foi constante, embora com resultados deveras aquém do esperado.

Aspectos genéticos del procesamiento de antígenos intracelulares

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Beatriz Martínez

1993-03-01

Full Text Available La activación de los linfocitos T (LT, un aspecto fundamental en la generación de la respuesta inmune (RI, se produce mediante el contacto de sus receptores antigénicos (TCR con un complejo formado por un péptido derivado del antígeno y una molécula del complejo mayor de Histocompatibilidad (MHC, HLA en el humano sobre la superficie de una célula presentadora de antígenos (APC. El origen del péptido puede ser exógenooextracelular, como sucede con la mayoría de los antígenos presentados por las moléculas MHC clase II, o endógeno (intracelular, como es el caso de las proteínas virales. sintetizadas por la célula y presentadas por las moléculas MHC Clase.

Um aspecto da diversidade cultural do caboclo amazônico: a religião

OpenAIRE

Maués, Raymundo Heraldo

2005-01-01

ESTE TRABALHO trata de um aspecto da diversidade cultural do caboclo amazônico, isto é, a religião. Esta se constitui numa espécie de catolicismo popular, que mantém relações com o xamanismo nativo - a pajelança cabocla -, e que se originou de antigas práticas e crenças dos índios Tupinambás, que habitaram parte da região amazônica no período colonial, bem como de influências portuguesas e africanas.HIS PAPER deals with a particular aspect of the Amazon caboclo's cultural diversity, namely, r...

Aspectos psicosociales en el embarazo en mujeres menores de edad en España

OpenAIRE

Ibáñez Blanco, Raquel

2015-01-01

Me decidí a realizar mi Trabajo de Fin de Grado sobre los aspectos fisiológicos y emocionales en mujeres menores de edad porque considero que la gestación es uno de los momentos claves en la vida de cualquier mujer. Esta situación se ve llevada al extremo cuando tiene lugar en una menor de edad. Aunque en principio pueda parecer algo lejano y puntual, podremos comprobar que es una situación más habitual de lo que esperamos. Además de los importantes cambios anatómicos y fisiológicos que se pr...

Analysing and Navigating Natural Products Space for Generating Small, Diverse, But Representative Chemical Libraries.

Science.gov (United States)

O'Hagan, Steve; Kell, Douglas B

2018-01-01

Armed with the digital availability of two natural products libraries, amounting to some 195 885 molecular entities, we ask the question of how we can best sample from them to maximize their "representativeness" in smaller and more usable libraries of 96, 384, 1152, and 1920 molecules. The term "representativeness" is intended to include diversity, but for numerical reasons (and the likelihood of being able to perform a QSAR) it is necessary to focus on areas of chemical space that are more highly populated. Encoding chemical structures as fingerprints using the RDKit "patterned" algorithm, we first assess the granularity of the natural products space using a simple clustering algorithm, showing that there are major regions of "denseness" but also a great many very sparsely populated areas. We then apply a "hybrid" hierarchical K-means clustering algorithm to the data to produce more statistically robust clusters from which representative and appropriate numbers of samples may be chosen. There is necessarily again a trade-off between cluster size and cluster number, but within these constraints, libraries containing 384 or 1152 molecules can be found that come from clusters that represent some 18 and 30% of the whole chemical space, with cluster sizes of, respectively, 50 and 27 or above, just about sufficient to perform a QSAR. By using the online availability of molecules via the Molport system (www.molport.com), we are also able to construct (and, for the first time, provide the contents of) a small virtual library of available molecules that provided effective coverage of the chemical space described. Consistent with this, the average molecular similarities of the contents of the libraries developed is considerably smaller than is that of the original libraries. The suggested libraries may have use in molecular or phenotypic screening, including for determining possible transporter substrates. © 2017 The Authors. Biotechnology Journal Published by Wiley

Treatment of spices with ionizing radiation - chemical, organoleptical, microbiological and toxicological analyses. Pt. 2. Behandlung von Gewuerzen mit ionisierenden Strahlen - chemische, sensorische, mikrobiologische und toxikologische Aspekte. T. 2

Energy Technology Data Exchange (ETDEWEB)

Schuettler, C; Boegl, W

1984-09-01

In the present second part of a study of the relevant literature the results of tests on 14 radiation treated spices and 2 radiation treated spice-mixtures were evaluated. The tests in this part contain mainly toxicological but also chemical and sensorial analyses. Most of the spices were treated with gamma radiation from cobalt-60 sources with doses between 80 Gy and 60 kGy. This part contains a cumulated subject index for part 1 and part 2.

Aspectos éticos en la investigación cualitativa con niños

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Luisa Fernanda Moscoso Loaiza

2018-01-01

Full Text Available La incorporación de los niños como participantes de estudios investigativos es una práctica más frecuente en la actualidad debido a la necesidad de conocer y entender su visión acerca de las experiencias de vida, lo que plantea nuevos retos y responsabilidades que se centran principalmente en las consideraciones éticas y metodológicas de la investigación. Este artículo describe los aspectos éticos que deben ser tenidos en cuenta en la investigación cualitativa con niños. Es un artículo de revisión con búsqueda sistemática en bases de datos, incluyendo artículos científicos, libros y literatura gris. Asimismo, se abordan las consideraciones éticas que se encuentran implicadas desde la vinculación de los niños como participantes, hasta la obtención de la información y la socialización de los resultados. Para la investigación se seleccionó la información relevante en torno a ocho temas conforme al proceso investigativo. Con esto se evidenció que la cuestión ética constituye un aspecto central en el momento de iniciar y desarrollar cualquier estudio investigativo, por lo que está presente desde su planteamiento hasta su finalización. Pudo concluirse que el cumplimiento de los criterios de rigor metodológico, como la dependencia, credibilidad, transferibilidad y confirmación, asegura la calidad de la investigación cualitativa con niños, y esto permite la adecuada aplicación de los principios éticos de beneficencia y no maleficencia, justicia, autonomía y confidencialidad.

Atores profissionais e estudantes de teatro: aspectos vocais relacionados à prática

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Juliana Richinitti Vilanova

Full Text Available RESUMO Objetivo: identificar e comparar, em atores profissionais e estudantes de teatro, os aspectos relacionados à prática profissional, ao uso profissional da voz, hábitos e cuidados vocais, hábitos de saúde e condições ambientais no trabalho. Métodos: participaram 60 sujeitos de ambos os sexos, subdivididos em 2 grupos: Grupo Profissional - atores profissionais de teatro e Grupo Alunos - alunos de teatro sem experiência profissional teatral. Ambos os grupos responderam a um questionário que abordou aspectos relacionados à prática profissional, à voz, hábitos vocais, de saúde, condições ambientais e cuidados vocais. Resultados: os indivíduos do Grupo Profissional apresentaram maior ocorrência de rouquidão; maior ocorrência dos hábitos de usar a voz profissional quando está gripado, em posturas corporais e com respiração inadequadas, gritar, e permanecer em local com mofo ou pouca ventilação, fechado e empoeirado, e realizar ensaio em local diferente do local do espetáculo. O hábito de saúde de ingerir bebidas geladas foi maior no Grupo Alunos. O número de sujeitos que não possuem dificuldade em cena e que realizam aquecimento vocal é significantemente maior no Grupo Profissional. O tipo de aquecimento realizado significantemente mais pelo Grupo Profissional foi som de "s", respiração costo-diafragmática, som basal e vogais. Conclusão: constatou-se que ambos os grupos realizam hábitos prejudiciais e estão expostos a ambiente de trabalho inadequado para saúde vocal. Estes dados apontam a necessidade de ações de saúde vocal, a fim de minimizar o risco de alterações vocais nos profissionais e preparar os estudantes para o aumento da demanda vocal.

Aspectos disautonômicos da porfiria aguda intermitente: a propósito de seis casos

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Charles P. Tilbery

1979-06-01

Full Text Available Foram estudados seis casos de porfiria aguda intermitente, sendo enfocados os aspectos disautonômicos apresentados durante a longa permanência hospitalar dos doentes (média de 64 dias. Foram observados taquicardia sinusal e hipertensão arterial (4 casos, parada cardíaca (3 casos e depressão respiratória (5 casos. Os autores tecem comentários a propósito da fisiopatologia destas alterações e chamam a atenção sobre o prognóstico sombrio da porfiria aguda intermitente.

Algunos aspectos de la Reforma al Código de Procedimiento Laboral (Ley 712 de 2001

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Armando Rojas

2002-01-01

Full Text Available El pasado 9 de junio entró en vigencia la ley 712 del 2001, ley quereformó algunos aspectos del código procesal del trabajo que ahora sellama código procesal del trabajo y de la seguridad social. La razón desu creación obedeció a la necesidad de actualizar un estatuto procesal demás de cincuenta años a la práctica procesal de la actualidad, necesitadade la urgente descongestión de los procesos en los despachos judiciales

Chemical composition and antioxidant activity of essential oil ...

African Journals Online (AJOL)

In the present work, we studied the chemical composition of the essential oil of Cistus ladanifer and Cistus libanotis growing in Eastern Morocco. The essential oils were obtained by hydrodistillation and their chemical composition was analysed using gas chromatography- mass spectrometry (GC–MS). Camphene, borneol ...

Analyses on the U-Mo/Al Chemical Interaction and the Effects of Diffusion Barrier Coatings

Energy Technology Data Exchange (ETDEWEB)

Ryu, Ho Jin; Kim, Woo Jeong; Cho, Woo Hyung; Jeong, Yong Jin; Lee, Yoon Sang; Park, Jong Man; Kim, Chang Kyu [Korea Atomic Energy Research Institute, Daejeon (Korea, Republic of)

2012-05-15

While many HEU-fueled research reactors have been converted by adopting LEU U{sub 3}Si{sub 2} fuel in harmony with the Reduced Enrichment for Research and Test Reactors (RERTR) program, some high performance research reactors still need the development of advanced fuels with higher uranium densities. Currently, gamma-phase U-Mo alloys are considered promising candidates to be used as high uranium density fuel for the high performance reactors. For the production of UMo alloy powder, the centrifugal atomization technology developed by KAERI has been considered the most promising way because of high yield production and excellent powder quality when compared with other possible methods such as grinding, machining or hydriding-dehydriding. However, severe pore formation associated with an extensive interaction between the U-Mo and Al matrix, although the irradiation performance of U-Mo itself showed most stable, delay the fuel qualification of UMo fuel for high performance research reactors. Because the reaction products, i.e. uranium aluminides (UAlx), is less dense than the mixed reactants, the volume of the fuel meat increases after formation of interaction layer(IL). In addition to the impact on the swelling performance, the reaction layers between the U-Mo and Al matrix induces a degradation of the thermal conductivities of the U-Mo/Al dispersion fuels. The chemical interaction between the U-Mo and Al matrix are analyzed in this study to find remedies to reduce the growth of the interaction layers during irradiation. In addition, various coating technologies for the formation of diffusion barriers on U-Mo particles are proposed as a result of the analyses

Results of chemical analyses of soil, shale, and soil/shale extract from the Mancos Shale formation in the Gunnison Gorge National Conservation Area, southwestern Colorado, and at Hanksville, Utah

Science.gov (United States)

Tuttle, Michele L.W.; Fahy, Juli; Grauch, Richard I.; Ball, Bridget A.; Chong, Geneva W.; Elliott, John G.; Kosovich, John J.; Livo, Keith E.; Stillings, Lisa L.

2007-01-01

Results of chemical and some isotopic analyses of soil, shale, and water extracts collected from the surface, trenches, and pits in the Mancos Shale are presented in this report. Most data are for sites on the Gunnison Gorge National Conservation Area (GGNCA) in southwestern Colorado. For comparison, data from a few sites from the Mancos landscape near Hanksville, Utah, are included. Twelve trenches were dug on the GGNCA from which 258 samples for whole-rock (total) analyses and 187 samples for saturation paste extracts were collected. Sixteen of the extract samples were duplicated and subjected to a 1:5 water extraction for comparison. A regional soil survey across the Mancos landscape on the GGNCA generated 253 samples for whole-rock analyses and saturation paste extractions. Seventeen gypsum samples were collected on the GGNCA for sulfur and oxygen isotopic analysis. Sixteen samples were collected from shallow pits in the Mancos Shale near Hanksville, Utah.

Estado nutricional y aspectos alimentarios de mujeres indígenas del departamento de Presidente Hayes, Paraguay

OpenAIRE

Gloria Echagüe; Valentina Díaz; Laura Mendoza; Pamela Mongelos; Graciela Giménez; Malvina Paez; Florentina Laspina; Amalia Castro; María Isabel Rodríguez; Patricia Araújo; Wilberto Castro; Ramón Marecos; Santiago Evers; Gerardo Deluca; Alejandra Picconi

2015-01-01

Introducción: Las comunidades indígenas presentan un mayor riesgo de inseguridad alimentaria y malnutrición, menor disponibilidad de recursos, y una creciente dependencia de alimentos más baratos aunque con un alto grado de procesamiento. Objetivo: Identificar el estado nutricional y aspectos alimentarios en mujeres indígenas de tres comunidades del Departamento de Presidente Hayes, Chaco Paraguayo. Metodología: Estudio observacional de diseño transversal con componente analítico, que incluyó...

La ingeniería de requisitos orientada a aspectos: una experiencia de aplicación en un sistema de ayuda en línea

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MARTA S. TABARES

2007-01-01

Full Text Available La Ingeniería de Rrequisitos Orientada a Aspectos provee enfoques para la elicitación y especificación de los asuntos y asuntos transversales en etapas tempranas de desarrollo de software. Este artículo presenta un caso de estudio para evaluar un modelo de la separación multidimensional de asuntos orientados a aspectos. Con el caso de estudio, se revisan sus características para la elicitación, análisis y trazabilidad de requisitos, así como algunas limitaciones del modelo y cómo este puede ser adaptado al proceso de desarrollo. Además, planteamos un conjunto de argumentos que podrían promover el desarrollo y evolución de este modelo

Chemical and laboratory analyses oceanographic data collected aboard the Wes Bordelon in the Gulf of Mexico from 2010-08-18 to 2010-08-22 in response to the Deepwater Horizon Oil Spill event (NODC Accession 0074863)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Chemical and laboratory analyses oceanographic data were collected aboard the Wes Bordelon in the Gulf of Mexico from 2010-08-18 to 2010-08-22 in response to the...

A imagem do Brasil no discurso do New York Times. Aspectos sociais

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Maria Inez Mateus Dota

2010-01-01

Full Text Available Este texto presenta un análisis de las noticias publicadas en el periódico The New York Times, versión digital, entre los meses de enero y junio de 2004. Al relacionarlas con los aspectos sociales del Brasil se intenta ver cuál es la imagen que ese periódico muestra del Brasil. El artículo adopta como fundamentos teóricos y metodológicos el análisis del discurso, principalmente las contribuiciones de Bell (1991, Fairclough (1995 y 2001, Fowler (1991 y Sousa (2004, discute las estrategias discursivas usadas para representar al Brasil y examina qué elementos escoge y los recursos de lenguaje que son empleados para la producción de los textos analizados.

Aspectos neuropsicológicos da depressão Aspectos neuropsicológicos de la depresión Neuropsychological aspects of depression

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Marcia Rozenthal

2004-08-01

Full Text Available Este artigo objetiva rever os principais achados neuropsicológicos na depressão, procurando diferenciar o tipo unipolar do bipolar, com ou sem psicose, tanto nos períodos de fase aguda quanto nos períodos intercríticos. Procurou-se, ainda, correlacionar os achados neuropsicológicos descritos na literatura consultada com os seus correlatos neuroanatômicos e neurofuncionais, ressaltando-se as áreas frontais e seus principais circuitos. Considerando-se estudos neuropsicológicos dos transtornos afetivos, algumas alterações têm se mostrado mais consistentes, sendo descritas disfunções importantes nas fases críticas, mas também no paciente assintomático. Nestas, interessam principalmente os aspectos atentivos e mnêmicos e o funcionamento executivo. Estudos desta natureza têm profundas implicações terapêuticas, apontando para a necessidade de desenvolver outras técnicas coadjuvantes, tais como reabilitação cognitiva e intervenções psicossociais, tornando o tratamento mais abrangente e incisivo nestes casos.Este artículo tiene por objetivo revisar los principales hallazgos neuropsicológicos en la depresión, procurando diferenciar sus formas de presentación unipolar y bipolar, con o sin sintomatología psicótica, tanto en el cuadro agudo como en los periodos inter-críticos. Busca, además, correlacionar los hallazgos neuropsicológicos descritos en la literatura consultada con los aspectos neuroanatómicos y neurofuncionales, destacando el área cortical frontal y sus circuitos principales. Considerándose estudios neuropsicológicos en trastornos afectivos, algunas alteraciones de atención, memoria y de funciones ejecutivas se han presentado más frecuentemente, siendo descritas en los periodos de crisis y también en el paciente asintomático. Estudios de esa naturaleza tienen profundas implicaciones terapéuticas, señalando además la necesidad de desarrollar otras técnicas terapéuticas coadyuvantes, tales como la

ASPECTOS FINANCIEROS DE LA REFORMA LOCAL

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Amable Corcuera Torres

2015-01-01

Full Text Available En este trabajo se analizan los aspectos jurídico-financieros más relevantes que incluye la Ley 27/2013, de 27 de diciembre, de racionalización y sostenibilidad de la Administración Local. Las nuevas medidas incluidas en la citada Ley afectan tanto a los ingresos de los entes locales como a sus gastos. Al respecto, se abordan cuestiones relativas a los efectos económicos de la fusión de municipios, la supresión general de licencias, el contenido de los planes económico-financieros, el cálculo del coste efectivo de los servicios, el redimensionamiento del sector público local, la novedosa atribución a la Junta de Gobierno Local de la competencia para aprobar ciertos actos financieros, la disolución de entidades de ámbito territorial inferior al Municipio que no presenten sus cuentas antes de 31 de diciembre de 2014 o la posibilidad de reducir la deuda comercial o financiera a través de la venta de patrimonio público del suelo. In this work the most important legal and financial aspects including the Law 27/2013, of 27 December, rationalization and sustainability of local government are analyzed. The new measures included in that Act affect both the income of local authorities and their expenses. In this regard, issues concerning the economic effects of the merger of municipalities, the general abolition of licenses, the content of financial plans, the calculation of the actual cost of services, the local public sector downsizing, the novel addresses allocation to the Local Government of the power to grant certain financial actions, the dissolution of entities below the Municipality territory who do not submit their accounts before December 31, 2014 or the possibility of reducing the commercial or financial debt through the sale of public land heritage.

Bronquiolite constritiva: aspectos tomográficos e correlação anatomopatológica

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Nobre Luiz Felipe

2002-01-01

Full Text Available Os autores relatam os principais aspectos da bronquiolite constritiva na tomografia computadorizada de alta resolução (TCAR do tórax em ins e expiração, e os comparam aos achados anatomopatológicos, mediante estudo de três casos da doença em mulheres com idade entre 29 e 46 anos que apresentavam dispnéia incaracterística, de caráter progressivo, encaminhadas para realização de espirometria, TCAR do tórax e biópsia pulmonar. A TCAR do tórax em ins e expiração demonstrou, em dois casos, padrão de atenuação em mosaico difuso, acentuado na expiração. No terceiro caso foram observados nódulos centrolobulares, não sendo realizado estudo em expiração. O material histopatológico demonstrou estenose importante de luzes bronquiolares por espessamento fibroso da lâmina própria e atrofia do epitélio bronquiolar, alterações diagnósticas da bronquiolite constritiva. A realização de TCAR do tórax em ins e expiração mostrou-se de fundamental importância na suspeição de doenças relacionadas à obstrução de pequenas vias aéreas, sendo o aspecto de atenuação em mosaico na expiração característico da topografia periférica das lesões. O diagnóstico de bronquiolite constritiva deve ser confirmado por biópsia pulmonar por meio de toracotomia.

Aspectos Contábeis dos Créditos de Carbono: Estudo com Autores Nacionais

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Vanderlei dos Santos

2013-12-01

Full Text Available O estudo objetiva verificar o entendimento de autores nacionais no que concerne à classificação, forma de reconhecimento e mensuração das operações com créditos de carbono. O estudo de natureza descritiva foi realizado em 2011, por meio de pesquisa de levantamento ou survey, com abordagem quantitativa. Utilizou-se o questionário como instrumento de coleta de dados, que foi enviado a 23 pesquisadores nacionais que possuem publicação de artigos relacionados à contabilização dos créditos de carbono em periódicos nacionais. Obtiveram-se nove respostas, que constituíram numa amostra por acessibilidade. Para a análise dos dados obtidos optou-se pelo uso da técnica da entropia informacional. Os resultados do estudo mostraram que, quanto à classificação dos créditos de carbono, há um entendimento maior entre os autores de que se trata de ativos especiais e que não podem ser considerados como commodity. Observou-se que não há consenso entre os autores em classificar os créditos de carbono como ativo intangível ou estoque. Deste modo, concluiu-se que ainda existem divergências no entendimento dos autores analisados no que concerne aos aspectos contábeis das operações com créditos de carbono. O artigo contribui principalmente na medida em que busca consolidar diferentes opiniões de autores, que pesquisam sobre a temática, demonstrando aspectos convergentes e divergentes, além de enfatizar lacunas para desenvolver pesquisas futuras.

Apuntes sobre globalización: aspectos culturales, tecnológicos y económicos

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Mayden Solano Jiménez

2014-01-01

Full Text Available La internacionalización de las economías con una consecuente apertura de mercados, la modernización de los organismos tanto públicos como privados, el incremento en la competitividad, las privatizaciones, la reducción del tamaño del Estado y el enlazamiento de las economías; bien por la vía de la regionalización económica de áreas continentales o la integración de mercados en los que intervienen las más disímiles zonas geográficas del mundo; son algunas características propias del reacomodamiento o nuevo orden mundial. Dentro de este contexto, el presente artículo busca analizar el fenómeno de la globalización desde los aspectos: cultural, económico y tecnológico; los cuales han permeado varios sectores de la sociedad global, generando una interrelación e integración entre diversos actores, en donde no sólo confluye el Estado- nación, también da cabida a otros actores del Sistema Internacional. Por lo cual, se analiza el comportamiento de la aldea global y la cultura dentro del fenómeno de la globalización a partir de aspectos económicos y tecnológicos, resaltando la importancia de los medios de comunicación o la llamada era de la información, el mercado financiero global y por último, el papel que juega el proceso de integración y la necesidad de reestructurar las principales instituciones internacionales.

Aspectos metodológicos na construção de projetos de pesquisa em Nutrição Clínica

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Deyliane Aparecida De almeida Pereira

2014-10-01

Full Text Available O objetivo deste texto é fomentar a reflexão e a crítica no processo de elaboração de projetos de pesquisa em nutrição clínica. São apresentados aspectos relativos a evidências, validade e confiabilidade dos resultados dos estudos nesse campo. É imprescindível que ocorra adequado planejamento da pesquisa, desde a definição do delineamento e do tipo do experimento, passando pelos aspectos éticos, escolha da população e cálculo do tamanho amostral até a avaliação da factibilidade dos riscos envolvidos na sua condução. Após a coleta das informações, as etapas seguintes correspondem à descrição dos resultados, análise estatística, verificação da consistência desses resultados e, ao final, sua adequada interpretação.

La Participación Transnacional en los Aspectos Religiosos de las Fiestas del Santo Patrón en una Comunidad Michoacana

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Sergio M. Martínez

2007-12-01

Full Text Available En este trabajo de investigación se analiza la participación transnacional en las mayordomías y en los aspectos religiosos durante las fiestas patronales de San Miguel Arcángel en un pueblo de la rivera del Lago de Pátzcuaro, Michoacán. Mediante un acercamiento etnográfico colaborativo en que los investigadores han participado activamente y han tomado apuntes durante los días de la fiesta se ha involucrando la descripción densa y análisis reflexivo de cada uno de los eventos religiosos. Al final se han triangulado los resultados para concluir que participación transnacional en esta comunidad es de suma importancia en varios aspectos, pero especialmente para mantener los vínculos religiosos de los emigrantes y lugareños y de la participación en el culto al santo patrón de futuras generaciones que transmigran entre México—Estados Unidos.

Polarographic validation of chemical speciation models

International Nuclear Information System (INIS)

Duffield, J.R.; Jarratt, J.A.

2001-01-01

It is well established that the chemical speciation of an element in a given matrix, or system of matrices, is of fundamental importance in controlling the transport behaviour of the element. Therefore, to accurately understand and predict the transport of elements and compounds in the environment it is a requirement that both the identities and concentrations of trace element physico-chemical forms can be ascertained. These twin requirements present the analytical scientist with considerable challenges given the labile equilibria, the range of time scales (from nanoseconds to years) and the range of concentrations (ultra-trace to macro) that may be involved. As a result of this analytical variability, chemical equilibrium modelling has become recognised as an important predictive tool in chemical speciation analysis. However, this technique requires firm underpinning by the use of complementary experimental techniques for the validation of the predictions made. The work reported here has been undertaken with the primary aim of investigating possible methodologies that can be used for the validation of chemical speciation models. However, in approaching this aim, direct chemical speciation analyses have been made in their own right. Results will be reported and analysed for the iron(II)/iron(III)-citrate proton system (pH 2 to 10; total [Fe] = 3 mmol dm -3 ; total [citrate 3- ] 10 mmol dm -3 ) in which equilibrium constants have been determined using glass electrode potentiometry, speciation is predicted using the PHREEQE computer code, and validation of predictions is achieved by determination of iron complexation and redox state with associated concentrations. (authors)

Hanford Environmental Restoration data validation process for chemical and radiochemical analyses

International Nuclear Information System (INIS)

Adams, M.R.; Bechtold, R.A.; Clark, D.E.; Angelos, K.M.; Winter, S.M.

1993-10-01

Detailed procedures for validation of chemical and radiochemical data are used to assure consistent application of validation principles and support a uniform database of quality environmental data. During application of these procedures, it was determined that laboratory data packages were frequently missing certain types of documentation causing subsequent delays in meeting critical milestones in the completion of validation activities. A quality improvement team was assembled to address the problems caused by missing documentation and streamline the entire process. The result was the development of a separate data package verification procedure and revisions to the data validation procedures. This has resulted in a system whereby deficient data packages are immediately identified and corrected prior to validation and revised validation procedures which more closely match the common analytical reporting practices of laboratory service vendors

Formación en recreación en Colombia: aspectos fundamentales para el estudio

OpenAIRE

Juan Manuel Carreño Cardozo; Narda Dioselina Robayo Fique

2010-01-01

El escrito presenta la reflexión fundamental de la investigación Estado del arte de los conceptos de recreación en Colombia, en Instituciones de educación técnica-tecnológica y de pregrado en recreación y afines originado en la línea de Investigación formar - Formación de Maestros en Recreación3 del programa Licenciatura en Recreación de la Facultad de Educación Física en la Universidad Pedagógica Nacional. La reflexión contiene los aspectos fundamentales que se postulan en la investigación p...

Cell behaviour on chemically microstructured surfaces

International Nuclear Information System (INIS)

Magnani, Agnese; Priamo, Alfredo; Pasqui, Daniela; Barbucci, Rolando

2003-01-01

Micropatterned surfaces with different chemical topographies were synthesised in order to investigate the influence of surface chemistry and topography on cell behaviour. The microstructured materials were synthesised by photoimmobilising natural Hyaluronan (Hyal) and its sulphated derivative (HyalS), both adequately functionalised with a photorective moiety, on glass substrates. Four different grating patterns (10, 25, 50 and 100 μm) were used to pattern the hyaluronan. The micropatterned samples were analysed by Secondary Ions Mass Spectrometry, Scanning Electron Microscopy (SEM) and Atomic Force Microscopy to investigate the chemistry and the topography of the surfaces. The spectroscopic and microscopic analysis of the microstructured surfaces revealed that the photoimmobilisation process was successful, demonstrating that the photomask patterns were well reproduced on the sample surface. The influence of chemical topographies on the cell behaviour was then analysed. Human and 3T3 fibroblasts, bovine aortic and human (HGTFN line) endothelial cells were used and their behaviour on the micropatterned surfaces was analysed in terms of adhesion, proliferation, locomotion and orientation. Both chemical and topographical controls were found to be important for cell guidance. By decreasing the stripe dimensions, a more fusiform shape of cell was observed. At the same time, the cell locomotion and orientation parallel to the structure increased. However, differences in cell behaviour were detected according to both cell type and micropattern dimensions

Apontamentos sobre educação e trabalho no Brasil contemporâneo: aspectos da contrarreforma educacional

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Fabiana de Cássia Rodrigues

2017-12-01

Full Text Available O presente artigo articula a temática da educação e trabalho com os desafios brasileiros em sua inserção na divisão internacional do trabalho, segundo as especificidades de sua formação social, marcada pelo capitalismo dependente e subdesenvolvido. Partimos da formulação das seguintes questões: De que educação necessitam os trabalhadores na realidade brasileira atual, segundo a ótica do capital? O esvaziamento de conteúdos e sentidos da educação estaria em consonância com as mudanças na estrutura ocupacional brasileira? A simplificação dos conteúdos trabalhados na escola traz quais exigências à formação docente? A fim de discuti-las a redação foi dividida em duas partes. Na primeira parte do texto, partiremos dos retrocessos atuais na estrutura produtiva, procurando evidenciar as suas determinações históricas. Coloca-se também em destaque as diretrizes educacionais formuladas pelos organismos multilaterais em consonância com as mudanças na estrutura ocupacional brasileira que contribuem para explicar as políticas que esvaziam a formação das trabalhadoras e trabalhadores. Na segunda parte, trataremos de aspectos da política educacional brasileira que materializam as perspectivas dos organismos multilaterais para a educação no contexto social brasileiro. Foram abordados três aspectos: 1 A elaboração da Base Nacional Comum Curricular; 2 As novas diretivas para formação de professores; 3 O Projeto Escola Sem Partido como mecanismo de pressão para minimizar o caráter formativo da escola. Percebemos que os três aspectos em questão articulados promovem um esvaziamento da escola e da formação de professores de conhecimentos científicos e político-culturais, contrários às reivindicações educacionais na luta pela redemocratização nos anos de 1980, conformando, desse modo, um movimento de contrarreforma.

Aspectos más significativos en la revisión de proyectos de cimientos y estructuras de edificación

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Gómez Hermoso, Jesús

2000-08-01

Full Text Available This document show all important aspects on the foundation and structure building project check. No speaking about calculation problems, it enumerate the qualities aspects that could be checked and all that have major effect in a good project and construction quality. It considerers at first, the relation between the structure and the architecture and the equipment building, and with the urbanistic aspects and the soil characteristics. Later, it talks about the typical aspects of structure, like materials, actions, general calculation and the checking of different elements (fancing pile, supports , beams and slabs. It speaks about concrete, metallic and wood structures.En el presente artículo se muestran todos aquellos aspectos que se consideran importantes en la revisión del proyecto de la cimentación y la estructura de un edificio. Sin entrar en problemas concretos de cálculo, se enumeran los aspectos cualitativos que han de comprobarse y se subrayan todos aquéllos que pueden tener una mayor repercusión en la buena calidad del proyecto y de la obra. Se tiene en cuenta, en primer lugar, la interrelación de la estructura con la arquitectura y las instalaciones del edificio, así como la que tiene (junto a la cimentación con el entorno urbanístico y las características del terreno. Posteriormente se tratan los aspectos más propios del proyecto de estructura, como son los materiales, las acciones, el cálculo general y la comprobación de los distintos elementos (zapatas, pilotes, encepados. pilas. vigas y forjados. Junto a las estructuras de hormigón armado se analizan las metálicas y las de madera laminada encolada.

Aspectos fundamentais no desenvolvimento de sistemas microemulsionados contendo anfotericina B para uso oftálmico

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Walteçá Louis Lima Silveira

2013-01-01

Full Text Available A exemplo do que ocorre com outros fármacos, a biodisponibilidade da anfotericina B (AmB através da via ocular repreesenta um grande desafio para a pesquisa científica. Na verdade, a baixa biodisponibilidade apresentada por tal molécula é devido, principalmente, a presença das barreiras oculares que impedem a absorção deste fármaco para os tecidos internos. A toxicidade associada a este fármaco, assim como a sua baixa capacidade em permear a córnea íntegra também consiste em um problema associado ao seu uso clínico. Novos veículos seguros e eficazes para a liberação ocular da AmB são, portanto, necessários. As microemulsões (MEs aparecem como um interessante sistema devido à sua transparência, estabilidade termodinâmica e favorável viscosidade. O conhecimento do processo de formação das MEs contendo AmB, assim como a compreensão de toda a sua caracterização físicoquímica correspondem a aspectos importantes para se determinar as condições favoráveis para que estes sistemas venham a ser empregados como colírios. Esta revisão tem como objetivo, portanto, abordar este tema enfatizando os principais aspectos relacionados com a utilização de MEs como sistemas de liberação para a AmB através da via tópica oftálmica.

Diversos aspectos atinentes a la esclavitud en Buenos Aires derivados del análisis de las fuentes notariales, 1821-1830

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Miguel A. Rosal

2004-11-01

Full Text Available El presente trabajo constituye un avance de la investigación sobre el negro porteño a partir de la segunda década post-revolucionaria, a través de la consulta de los distintos registros de los Protocolos Notariales, conservados en el Archivo General de la Nación. En síntesis, el artículo pretende ilustrar aspectos que quizá no hayan merecido la necesaria atención por parte de los investigadores de la problemática afroporteña durante el período independiente; nos referimos al análisis del fenómeno de la manumisión, preciada o graciosa, de la libertad futura condicional, de la figura del negro propietario de bienes inmuebles y de esclavos, como así también de los testamentos de las personas "de color". Parece útil, entonces, intentar estos estudios que nos podrán iluminar sobre aspectos poco o nada conocidos de los morenos y pardos de Buenos Aires durante el siglo XIX.

Coordinating Chemical and Mineralogical Analyses of Antarctic Dry Valley Sediments as Potential Analogs for Mars

Science.gov (United States)

Patel, S. N.; Bishop, J. L.; Englert, P.; Gibson, E. K.

2015-01-01

The Antarctic Dry Valleys (ADV) provide a unique terrestrial analog for Martian surface processes as they are extremely cold and dry sedimentary environments. The surface geology and the chemical composition of the Dry Valleys that are similar to Mars suggest the possible presence of these soil-formation processes on Mars. The soils and sediments from Wright Valley, Antarctica were investigated in this study to examine mineralogical and chemical changes along the surface layer in this region and as a function of depth. Surface samples collected near Prospect Mesa and Don Juan Pond of the ADV were analyzed using visible/near-infrared (VNIR) and mid-IR reflectance spectroscopy and major and trace element abundances.

Aspectos de la infección urinaria en el adulto

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Daisy María Contreras Duverger

1998-02-01

Full Text Available Se realiza una revisión bibliográfica de aspectos importantes de la infección urinaria inespecífica, que se consideran de interés para la mejor preparación del médico general integral. Se describen las terminologías microbiológicas y las utilizadas para evaluar la respuesta al tratamiento, así como la clasificación más actual de esta entidad. Se mencionan los tipos de tratamiento y las drogas más utilizadas, y se enfatiza en el uso de las quinolonasIt is made a bibliographic review of some important aspects of unspecific urinary infection that are considered of interest for a better training of the general comprehensive physician. A description is made of the microbiological terminolgies and of those used to evaluate the response to the treatment, as well as of the latest classification of this disease. The different types of treatment and the most used drugs are mentioned here. Emphasis is made on the use of quinolines

Aspecto de la Agricultura Intensiva en la Provincia de Ocaña, Departamento Norte de Santander.

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Obregón Botero Rafael

1941-10-01

Full Text Available Un inteligente sentido de lógica deducción, unido al patriótico esfuerzo por el mejoramiento de su tierra, llevó al Dr. Luis Carvajalino Jácome a la conclusión de que el problema de la agricultura intensiva en la Provincia de Ocaña (Santander del Norte presentaba aspectos tan diversos y complejos, que quiso por todos los medios interesar a los Gobiernos Nacional y Departamental en una favorable solución. Fue así como en el cumplimiento de un programa de resurgimiento progresivo de la industria agrícola, este conocido profesional nortesantandereano pidió al Ministerio de la Economía Nacional se comisionara a un Fitopatólogo y a un Entomólogo para estudiar los problemas surgidos del creciente aumento de plagas y enfermedades en la región y especialmente el decaimiento que por estos factores notábase en la industria cebollera. Atendiendo a la insinuación, el Ministerio de la Economía tuvo a bien encargarnos de tan interesante comisión y para el mejor cumplimiento a nuestro juicio, estudiamos y observamos con algún detenimiento los diferentes aspectos de su agricultura. Estas observaciones y conclusiones las queremos presentar y ofrecer como una modesta cooperación al programa de progreso en cuyos resultados finales están empeñados tanto sus dirigentes como el pueblo de Santander. A pesar de que nuestra misión se limitaba al estudio de la sanidad de los cultivos, quisimos hacer extensivas las observaciones a otros puntos de vital importancia, toda vez que las modalidades de la región presentaban aspectos de un problema que pudiéramos llamar nuevo para nuestra agricultura nacional. Quizás el cultivo del café en las tierras del Quindío tienen un verdadero aspecto de agricultura intensiva con caracteres de económica importancia, pero aparte de ésta y de contadas regiones del país, nos atrevemos a opinar que la localidad ahora descrita se perfila como exponente de la futura agricultura intensiva a la cual

Prediction of chemical composition of South African Medicago sativa ...

African Journals Online (AJOL)

The near infrared reflectance spectroscopy (NIRS) to predict chemical and digestibility parameters was investigated. Samples (n = 168) representing the spectral characteristics of the South African. Medicago sativa L. hay population were chemically analysed for the development of calibration equations. Values for r² and ...

A method for assessing residual NAPL based on organic chemical concentrations in soil samples

International Nuclear Information System (INIS)

Feenstra, S.; Mackay, D.M.; Cherry, J.A.

1991-01-01

Ground water contamination by non-aqueous phase liquid (NAPL) chemicals is a serious concern at many industrial facilities and waste disposal sites. NAPL in the form of immobile residual contamination, or pools of mobile or potentially mobile NAPL, can represent continuing sources of ground water contamination. In order to develop rational and cost-effective plans for remediation of soil and ground water contamination at such sites, it is essential to determine if non-aqueous phase liquid (NAPL) chemicals are present in the subsurface and delineate the zones of NAPL contamination. Qualitatively, soil analyses that exhibit chemical concentrations in the percent range or >10,000 mg/kg would generally be considered to indicate the presence of NAPL. However, the results of soil analyses are seldom used in a quantitative manner to assess the possible presence of residual NAPL contamination when chemical concentrations are lower and the presence of NAPL is not obvious. The assessment of the presence of NAPL in soil samples is possible using the results of chemical and physical analyses of the soil, and the fundamental principles of chemical partitioning in unsaturated or saturated soil. The method requires information on the soil of the type typically considered in ground water contamination studies and provides a simple tool for the investigators of chemical spill and waste disposal sites to assess whether soil chemical analyses indicate the presence of residual NAPL in the subsurface

Sindrome de Landau Kleffner aspectos clinicos, eletrencefalograficos e psicossociais : estudo de seguimento a longo prazo

OpenAIRE

Marcos Henrique Coelho Duran

2008-01-01

Resumo: Objetivos: A Síndrome de Landau-Kleffner (SLK) é uma entidade rara, caracterizada por epilepsia e afasia. Ocorre em crianças com aquisição normal da linguagem, geralmente, entre 3 e 7 anos de idade. A evolução a longo prazo é controversa e pouco estudada. O presente estudo tem como objetivo verificar a evolução em uma série de sujeitos com diagnóstico de SLK, enfocando os aspectos clínicos, eletrencefalográficos, psicossociais e da qualidade de vida. Métodos: Trata-se de um estudo tra...

Aspectos históricos de libros relevantes de la historia de la pediatría

OpenAIRE

Vargas Rubiano, Alfonso

2010-01-01

El comité Editorial de Pediatría, Diagnostico y Tratamiento, me ha solicitado la redacción del Prólogo para su segunda edición, "deseando que se haga mención de algunos aspectos históricos del desarrollo de la Pediatría en la Universidad Nacional de Colombia y la contribución a éste proceso del profesor José Ignacio Barberi y del Hospital de la Misericordia." Para cumplir tan obligante invitación de los profesores Edgar Rojas, Hector Ulloque, Fernando Sarmiento y Carlos Medina, he revisado la...

Placentação em cutias (Dasyprocta aguti, CARLETON, M.D.): aspectos morfológicos

OpenAIRE

Rodrigues, Rosângela Felipe; Miglino, Maria Angelica; Ferraz, Rosa Helena dos Santos; Morais-Pinto, Luciano de

2003-01-01

A cutia é um roedor silvestre, encontrado no sul da América Central e em regiões tropicais da América do Sul, principalmente nas regiões norte, nordeste e sudeste do Brasil. Estes animais fornecem proteína de origem animal e por isso, apresentam importância sócio-econômica para as regiões do norte e nordeste do Brasil. Para o presente trabalho foram utilizadas sete placentas de cutias (Dasyprocta aguti), em diferentes fases da gestação. Nos aspectos morfológicos a placenta da cutia apresenta ...

Aspectos significativos surgidos de la experiencia de haber sido responsable de un evento adverso en salud

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Augusto Hernán Ferreira-Umpiérrez

2014-01-01

Full Text Available Objetivo: conocer los aspectos significativos para las enfermeras sobre su experiencia de haber sido responsables de un evento ad- verso en salud. Materiales y métodos: estudio cualitativo exploratorio, con el enfoque de la hermenéutica dialéctica. Se utilizó la técnica de análisis de contenido. Muestra constituida por doce enfermeras que tuvieron al menos una experiencia de responsabilidad ante un evento adverso con un paciente, y por cuatro supervisores de enfermería con responsabilidad de supervisión al ocurrir el evento adverso. Resultados: bajo el enfoque de la hermenéutica dialéctica, el análisis de los datos permitió construir las siguientes categorías relacio- nadas con la organización de salud y los recursos humanos: el contexto organizacional, el desconocimiento del proceso de notifi cación, la sobrecarga de trabajo, la ausencia de descanso. Conclusiones: reconocer la importancia del contexto organizacional donde se desarrollan los cuidados, el desconocimiento del proceso de notificación como aspecto por mejorar, la sobrecarga de trabajo y la ausencia d e descanso del personal. Es necesario profundizar en el tema mediante investigaciones y desarrollo de intervenciones que promuevan la cult ura de seguridad en la atención sanitaria, con implicaciones en la práctica y para la formación de las enfermeras.

Ensino da Arte na escola pública e aspectos da política educacional: contexto e perspectivas Enseñanza del arte en la escuela pública y aspectos de la política educacional: contexto y perspectivas Teaching of art at public schools and educational politics aspects: contexts and perspectives

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Karina Barra Gomes

2008-12-01

Full Text Available Este artigo procura ampliar constatações e considerações que abrangem o ensino da Arte na escola pública e aspectos da política educacional. Nossa inquietação, quanto ao percurso do ensino artístico no país e a sua realidade nos dias atuais, levounos a contextualizá-lo a aspectos da política educacional, associando o ensino a questões que incitam a conscientização dos professores de Arte, sua atuação e o envolvimento com a prática pedagógica diante das condições educacionais que nos permite viver a política educacional marcada pela globalização e pela pós-modernidade.Este artículo busca ampliar constataciones y consideraciones que abarcan la enseñanza del Arte en la escuela pública y aspectos de la política educacional. Nuestra inquietud con relación al curso de la enseñanza artística en el país y su realidad en los días actuales nos llevó a contextualizarla a aspectos de la política educacional, asociando la enseñanza a cuestiones que incitan la concientización de los profesores del Arte, su actuación y el envolvimiento con la práctica pedagógica frente a las condiciones educacionales que nos permite vivir la política educacional, marcada por la globalización y por la pos-modernidad.This article aims to amplify the evidences and considerations that deal with the teaching of Art in public schools and also with some public politics aspects. Our worries about the teaching of Art path in this country and its reality nowadays has driven us to conceptualize it with some educational politics aspects, associating the teaching of Art to subjects that stir teachers' awareness, their performance and their involvement in pedagogic practices in the pedagogic conditions, that allowed us to live the pedagogic politics which are marked by globalization and postmodernism.

Historical and social aspects of halitosis Los aspectos históricos y sociales de halitosis Aspectos históricos e sociais da halitose

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Marina Sá Elias

2006-10-01

Full Text Available Buccal odors have always been a factor of concern for society. This study aims to investigate the historical and social base of halitosis, through systematized research in the database BVS (biblioteca virtual em saúde - virtual library in health and also in books. Lack of knowledge on how to prevent halitosis allows for its occurrence, limiting quality of life. As social relationships are one of the pillars of the quality of life concept, halitosis needs to be considered a factor of negative interference. Education in health should be accomplished with a view to a dynamic balance, involving human beings' physical and psychological aspects, as well as their social interactions, so that individuals do not become jigsaw puzzles of sick parts.Los olores bucales siempre han sido un factor de preocupación para la sociedad, y ellos todavía son ahora. El objetivo de este estudio es hacer una base histórica y social en la halitosis. Fue efectuada una investigación sistematizada en la base de datos BVS (biblioteca virtual em saúde - la biblioteca virtual en salud y también en los libros. La ignorancia en cómo prevenir la halitosis permite su ocurrencia, que limita la calidad de vida. Siendo las relaciones sociales uno de los pilares del concepto de calidad de vida, es necesario considerar la halitosis un factor de interferencia negativa. La educación en salud se debe llevar a cabo buscando un equilibrio dinámico, involucrando los aspectos físicos y psicológicos del ser humano, así como sus interacciones sociales, para que los individuos no se vuelvan rompecabezas de partes enfermas.O problema referente aos odores bucais sempre foi fator de preocupação para a sociedade e ainda hoje se mostra presente. O objetivo do presente estudo foi realizar um embasamento histórico e social sobre a halitose. Para tanto, foi feita busca sistematizada, selecionando artigos por meio da base de dados BVS (Biblioteca Virtual em Saúde e também pesquisa em

Chemical plant innovative safety investments decision-support methodology.

Science.gov (United States)

Reniers, G L L; Audenaert, A

2009-01-01

This article examines the extent to which investing in safety during the creation of a new chemical installation proves profitable. The authors propose a management supporting cost-benefit model that identifies and evaluates investments in safety within a chemical company. This innovative model differentiates between serious accidents and less serious accidents, thus providing an authentic image of prevention-related costs and benefits. In classic cost-benefit analyses, which do not make such differentiations, only a rudimentary image of potential profitability resulting from investments in safety is obtained. The resulting management conclusions that can be drawn from such classical analyses are of a very limited nature. The proposed model, however, is applied to a real case study and the proposed investments in safety at an appointed chemical installation are weighed against the estimated hypothetical benefits resulting from the preventive measures to be installed at the installation. In the case-study carried out in question, it would appear that the proposed prevention investments are justified. Such an economic exercise may be very important to chemical corporations trying to (further) improve their safety investments.

Globalización: aspectos políticos, económicos y sociales

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Jambell García

2010-01-01

Full Text Available En el artículo se exploran las dimensiones políticas, económicas y sociales del proceso de globalización. La revisión documental, bibliográfica y hemerográfica, permite identificar los aspectos que involucra este fenómeno mundial. Como resultado se observa que mientras persista el actual esquema de reproducción capitalista a escala global, la globalización tenderá a favorecer más a un pequeño grupo de países altamente desarrollados, en detrimento de la mayoría de la población del planeta, haciendo difícil superar los retos del desarrollo humano. Se concluye la necesidad de un cambio de paradigma y de comportamiento por parte de la sociedad para alcanzar un desarrollo económico y social equitativo.

Game, game, game and again game, de Jason Nelson: aspectos da contemporaneidade

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Flavio Pereira Senra

2016-01-01

Full Text Available Embora pensadores como o escritor Mario Vargas Llosa afirmem que os tempos hodiernos têm como característica principal a frivolidade, por conta da velocidade e quantidade de informações a serem digeridas diariamente, artistas em sua pulsão criativa exploram tais paradoxos de grandeza/pequenez em suas obras de arte. Este artigo visa apreender na obra Game, game, game and again game aspectos da contemporaneidade, como o conceito de lúdico e a enorme gama de entretenimentos voltados a um público imerso na indústria da cultura, através da forma como eles são trabalhados junto a conceitos como interatividade como forma de coautoria da obra de arte, finitude artística e permanência no meio digital, e transmidialidade na criação estética.

Audición espacial en ambientes reverberantes: aspectos teóricos relevantes

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Claudia Arias

2003-01-01

Full Text Available En ambientes reverberantes el sonido se propaga en múltiples direcciones sufriendo cambios físicos de importancia. El sistema auditivo debe se capaz de resolver la competencia perceptual que se produce entre el sonido original y sus reflexiones. En este artículo se presentan aspectos teóricos relevantes de la audición espacial con especial tratamiento del efecto precedente. Se trata de una estrategia inconciente que el individuo utiliza para enfrentar la información sonora conflictiva de los espacios reverberantes. Es el fenómeno perceptual de fusión espacial que ocurre cuando dos sonidos similares se presentan desde diferentes lugares, separados por un breve retardo de tiempo. El individuo escucha sólo un sonido que localiza según la dirección del sonido que llegó primero

Manual of selected physico-chemical analytical methods. IV

International Nuclear Information System (INIS)

Beran, M.; Klosova, E.; Krtil, J.; Sus, F.; Kuvik, V.; Vrbova, L.; Hamplova, M.; Lengyel, J.; Kelnar, L.; Zakouril, K.

1990-11-01

The Central Testing Laboratory of the Nuclear Research Institute at Rez has for a decade been participating in the development of analytical procedures and has been providing analyses of samples of different types and origin. The analytical procedures developed have been published in special journals and a number of them in the Manuals of analytical methods, in three parts. The 4th part of the Manual contains selected physico-chemical methods developed or modified by the Laboratory in the years 1986-1990 within the project ''Development of physico-chemical analytical methods''. In most cases, techniques are involved for non-nuclear applications. Some can find wider applications, especially in analyses of environmental samples. Others have been developed for specific cases of sample analyses or require special instrumentation (mass spectrometer), which partly restricts their applicability by other institutions. (author)

Chemical, laboratory analyses, physical and profile oceanographic data collected aboard the BUNNY BORDELON in the Gulf of Mexico from 2010-08-18 to 2010-08-23 in response to the Deepwater Horizon Oil Spill event (NODC Accession 0069118)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Chemical, laboratory analyses, physical and profile oceanographic data were collected aboard the BUNNY BORDELON in the Gulf of Mexico from 2010-08-18 to 2010-08-23...

Multivariate analyses of crater parameters and the classification of craters

Science.gov (United States)

Siegal, B. S.; Griffiths, J. C.

1974-01-01

Multivariate analyses were performed on certain linear dimensions of six genetic types of craters. A total of 320 craters, consisting of laboratory fluidization craters, craters formed by chemical and nuclear explosives, terrestrial maars and other volcanic craters, and terrestrial meteorite impact craters, authenticated and probable, were analyzed in the first data set in terms of their mean rim crest diameter, mean interior relief, rim height, and mean exterior rim width. The second data set contained an additional 91 terrestrial craters of which 19 were of experimental percussive impact and 28 of volcanic collapse origin, and which was analyzed in terms of mean rim crest diameter, mean interior relief, and rim height. Principal component analyses were performed on the six genetic types of craters. Ninety per cent of the variation in the variables can be accounted for by two components. Ninety-nine per cent of the variation in the craters formed by chemical and nuclear explosives is explained by the first component alone.

Chemical sensors

International Nuclear Information System (INIS)

Hubbard, C.W.; Gordon, R.L.

1987-05-01

The revolution in analytical chemistry promised by recent developments in the field of chemical sensors has potential for significant positive impact on both research and production activities conducted by and for the Department of Energy. Analyses which were, in the past, performed only with a roomful of expensive equipment can now be performed with miniature solid-state electronic devices or small optical probes. Progress in the development of chemical sensors has been rapid, and the field is currently growing at a great rate. In accordance, Pacific Northwest Laboratory initiated a survey of recent literature so that contributors to active programs in research on analytical methods could be made aware of principles and applications of this new technology. This report presents the results of that survey. The sensors discussed here are divided into three types: micro solid-state devices, optical sensors, and piezoelectric crystal devices. The report is divided into three corresponding sections. The first section, ''Micro Solid-State Devices,'' discusses the design, operation, and application of electronic sensors that are produced in much the same way as standard solid-state electronic devices. The second section, ''Optrodes,'' covers the design and operation of chemical sensors that use fiber optics to detect chemically induced changes in optical properties. The final section, ''Piezoelectric Crystal Detectors,'' discusses two types of chemical sensors that depend on the changes in the properties of an oscillating piezoelectric crystal to detect the presence of certain materials. Advantages and disadvantages of each type of sensor are summarized in each section

Physico-chemical properties and sensory evaluation of jam made ...

African Journals Online (AJOL)

This study was carried out to investigate the possibility of producing jam from black-plum and to evaluate the physico-chemical properties, nutritional properties and consumer acceptability of the product. Black-plum jam was produced using traditional openkettle method. The physico-chemical analyses of black-plum fruit ...

Effect of Natural Fermentation on the Chemical and Nutritional ...

African Journals Online (AJOL)

Changes in the chemical and nutritional composition of naturally fermented soy nono were studied at ambient temperature (27 ± 2oC) for 72 h. The differently fermented soy nono samples were collected at 6 h intervals and analysed for chemical, proximate and mineral composition using standard laboratory procedures.

Chemical, laboratory analyses, physical and profile oceanographic data collected aboard the JACK FITZ in the Gulf of Mexico from 2010-08-18 to 2010-08-23 in response to the Deepwater Horizon Oil Spill event (NODC Accession 0069119)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Chemical, laboratory analyses, physical and profile oceanographic data were collected aboard the JACK FITZ in the Gulf of Mexico from 2010-08-18 to 2010-08-23 in...

Chemical, laboratory analyses, physical and profile oceanographic data collected aboard the JACK FITZ in the Gulf of Mexico from 2010-06-12 to 2010-06-20 in response to the Deepwater Horizon Oil Spill event (NODC Accession 0069074)

Data.gov (United States)

National Oceanic and Atmospheric Administration, Department of Commerce — Chemical, laboratory analyses, physical and profile oceanographic data were collected aboard the JACK FITZ in the Gulf of Mexico from 2010-06-12 to 2010-06-20 in...

Chemicals of emerging concern in water and bottom sediment in Great Lakes areas of concern, 2010 to 2011-Collection methods, analyses methods, quality assurance, and data

Science.gov (United States)

Lee, Kathy E.; Langer, Susan K.; Menheer, Michael A.; Foreman, William T.; Furlong, Edward T.; Smith, Steven G.

2012-01-01

The U.S. Geological Survey (USGS) cooperated with the U.S. Environmental Protection Agency and the U.S. Fish and Wildlife Service on a study to identify the occurrence of chemicals of emerging concern (CECs) in water and bottom-sediment samples collected during 2010–11 at sites in seven areas of concern (AOCs) throughout the Great Lakes. Study sites include tributaries to the Great Lakes in AOCs located near Duluth, Minn.; Green Bay, Wis.; Roches­ter, N.Y.; Detroit, Mich.; Toledo, Ohio; Milwaukee, Wis.; and Ashtabula, Ohio. This report documents the collection meth­ods, analyses methods, quality-assurance data and analyses, and provides the data for this study. Water and bottom-sediment samples were analyzed at the USGS National Water Quality Laboratory in Denver, Colo., for a broad suite of CECs. During this study, 135 environmental and 23 field dupli­cate samples of surface water and wastewater effluent, 10 field blank water samples, and 11 field spike water samples were collected and analyzed. Sixty-one of the 69 wastewater indicator chemicals (laboratory method 4433) analyzed were detected at concentrations ranging from 0.002 to 11.2 micrograms per liter. Twenty-eight of the 48 pharmaceuticals (research method 8244) analyzed were detected at concentrations ranging from 0.0029 to 22.0 micro­grams per liter. Ten of the 20 steroid hormones and sterols analyzed (research method 4434) were detected at concentrations ranging from 0.16 to 10,000 nanograms per liter. During this study, 75 environmental, 13 field duplicate samples, and 9 field spike samples of bottom sediment were collected and analyzed for a wide variety of CECs. Forty-seven of the 57 wastewater indicator chemicals (laboratory method 5433) analyzed were detected at concentrations ranging from 0.921 to 25,800 nanograms per gram. Seventeen of the 20 steroid hormones and sterols (research method 6434) analyzed were detected at concentrations ranging from 0.006 to 8,921 nanograms per gram. Twelve of

Soil analyses by ICP-MS (Review)

International Nuclear Information System (INIS)

Yamasaki, Shin-ichi

2000-01-01

Soil analyses by inductively coupled plasma mass spectrometry (ICP-MS) are reviewed. The first half of the paper is devoted to the development of techniques applicable to soil analyses, where diverse analytical parameters are carefully evaluated. However, the choice of soil samples is somewhat arbitrary, and only a limited number of samples (mostly reference materials) are examined. In the second half, efforts are mostly concentrated on the introduction of reports, where a large number of samples and/or very precious samples have been analyzed. Although the analytical techniques used in these reports are not necessarily novel, valuable information concerning such topics as background levels of elements in soils, chemical forms of elements in soils and behavior of elements in soil ecosystems and the environment can be obtained. The major topics discussed are total elemental analysis, analysis of radionuclides with long half-lives, speciation, leaching techniques, and isotope ratio measurements. (author)

Assessment of toxicological profiles of the municipal wastewater effluents using chemical analyses and bioassays.

Science.gov (United States)

Smital, Tvrtko; Terzic, Senka; Zaja, Roko; Senta, Ivan; Pivcevic, Branka; Popovic, Marta; Mikac, Iva; Tollefsen, Knut Erik; Thomas, Kevin V; Ahel, Marijan

2011-05-01

The hazardous chemical contamination of untreated wastewater and secondary effluent from the wastewater treatment plant (WWTP) of the city of Zagreb, Croatia was comprehensively characterized using large-volume solid-phase extraction (SPE) and silica gel fractionation, followed by a detailed analysis of the resulting extracts by a combination of chemical and bioassay methods. Over 100 individual contaminants or closely related-contaminant groups were identified by high-resolution gas chromatography/mass spectrometry (GC/MS) and liquid chromatography/quadrupole time-of-flight mass spectrometry (LC-QTOF). Ecotoxicity profiling of the investigated samples, including cytotoxicity, chronic toxicity and EROD activity; inhibition of the multixenobiotic resistance (MXR), genotoxicity and estrogenic potential, revealed the most significant contribution of toxic compounds to be present in polar fractions. Wastewater treatment using conventional activated sludge process reduced the initial toxicity of raw wastewater to various extents, ranging from 28% for algal toxicity to 73.2% for an estrogenic activity. The most efficient toxicity removal was observed for the polar compounds. Copyright © 2010 Elsevier Inc. All rights reserved.

Vanadium NMR Chemical Shifts of (Imido)vanadium(V) Dichloride Complexes with Imidazolin-2-iminato and Imidazolidin-2-iminato Ligands: Cooperation with Quantum-Chemical Calculations and Multiple Linear Regression Analyses.

Science.gov (United States)

Yi, Jun; Yang, Wenhong; Sun, Wen-Hua; Nomura, Kotohiro; Hada, Masahiko

2017-11-30

The NMR chemical shifts of vanadium ( 51 V) in (imido)vanadium(V) dichloride complexes with imidazolin-2-iminato and imidazolidin-2-iminato ligands were calculated by the density functional theory (DFT) method with GIAO. The calculated 51 V NMR chemical shifts were analyzed by the multiple linear regression (MLR) analysis (MLRA) method with a series of calculated molecular properties. Some of calculated NMR chemical shifts were incorrect using the optimized molecular geometries of the X-ray structures. After the global minimum geometries of all of the molecules were determined, the trend of the observed chemical shifts was well reproduced by the present DFT method. The MLRA method was performed to investigate the correlation between the 51 V NMR chemical shift and the natural charge, band energy gap, and Wiberg bond index of the V═N bond. The 51 V NMR chemical shifts obtained with the present MLR model were well reproduced with a correlation coefficient of 0.97.

Trends of chemical monitoring in power stations

International Nuclear Information System (INIS)

Winkler, R.; Venz, H.

1983-01-01

Frequently, the state-of-the-art of chemical monitoring in power plants is still determined by conservative methods. A thorough rationalization requires not only modern analytical procedures, but also the consideration of chemically affected processes in complex process analyses and the combination of automatic analyzers with available process computers. Using some examples, ways of reducing monitoring efforts without impairing safety and economy of nuclear power plant operation are pointed out. (author)

Aspectos nutricionais relacionados ao ciclo menstrual Nutritional aspects related to menstrual cycle

Directory of Open Access Journals (Sweden)

Helena Alves de Carvalho SAMPAIO

2002-09-01

Full Text Available O objetivo da presente revisão é apresentar os principais tópicos discutidos na literatura quanto à associação da nutrição com o ciclo menstrual, contribuindo para a implementação do atendimento nutricional de mulheres. São revisados aspectos referentes à fisiologia da menstruação, alterações metabólicas durante o ciclo menstrual e comportamentos alimentares associados a ele. Considerando-se o ciclo menstrual dividido em duas fases, a folicular e a lútea, é nesta última que são descritas mais alterações, como retenção de água, elevação de peso, aumento de demanda energética, modificações no perfil lipídico e no metabolismo de vitamina D, cálcio, magnésio e ferro, hipersensibilidade emocional, dores generalizadas e mudança do comportamento alimentar. Em relação a este último item, podem ocorrer maior ingestão energética e o desenvolvimento de compulsões alimentares, principalmente por chocolate, doces e alimentos muito salgados. É fundamental que todos os aspectos citados sejam investigados durante a consulta nutricional, a fim de serem adotadas condutas mais específicas.The aim of the present review is to show the most important topics discussed in literature about the association between nutrition and menstrual cycle, contributing to improve the nutritional care for women. Aspects related to physiology of the menstruation, metabolic changes and feeding behavior during the menstrual cycle are reviewed. Considering the menstrual cycle divided in two phases, follicular and luteal, it is in this last one that more alterations are described, like fluid retention, weight gain, increase in caloric needs, modifications in the lipid profile and in the metabolism of vitamin D, calcium, magnesium and iron, emotional hypersensitivity, aches and changes in feeding behavior. In relation to this last item, it can occur a higher caloric intake and the development of food cravings, mainly for chocolate, candies and

Aspectos psicobiológicos do comportamento alimentar Psychobiological aspects of feeding behavior

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Rosana Passos Beinner Cambraia

2004-06-01

Full Text Available Esta revisão aborda alguns aspectos psicobiológicos ligados à manifestação do comportamento alimentar, e tem como objetivo evidenciar a relação entre os principais processos neuropsicológicos e a neurociência nutricional. Algumas estruturas neurais estão associadas ao controle alimentar por mecanismos distintos e correlatos que ocorrem no hipotálamo, hipocampo e em outras áreas como no cerebelo, bulbo olfatório, glândulas pituitária e pineal que exercem funções distintas, porém influênciam o comportamento alimentar, intermediadas geralmente por neurotransmissores comuns. Os precursores dos neuroquímicos apresentam funções específicas, sendo a influência na alimentação relevante no contexto comportamental da escolha de alimentos. Os processos sensoriais na alimentação como paladar, olfato, visão e audição interagem entre si e com outras estruturas e vias neurais, participando também do controle do apetite e da saciedade, que culminam na iniciação e no término da alimentação. A interação entre aspectos neurais no processo de consumo de alimento promove a manifestação do comportamento alimentar específico para cada espécie em seu ambiente.This review shows how some psychobiological aspects are related to feeding behavior manifestation, and has as it objective to provide evidence as to the relation between neuropsychological processes and nutritional neuroscience. Several neural structures are associated with alimentary controls, which are distinct but correlated mechanisms; for example: hypothalamus, hypocampus, cerebellum, olfactory bulb, pituitary and pineal glands, all presenting distinct functions, but affecting feeding behavior directly or indirectly through common neurotransmitters. Neurochemical precursors present specific functions and their influence on feeding is evident in behavioral food selection. The sensory processes in feeding, principally taste, olfaction, vision and hearing, interact with

Chemical and mineralogical characterization of iron concretions of some Brazilian soils

International Nuclear Information System (INIS)

Soares, M.F.

1980-01-01

Chemical and physical analyses of concretionary materials were carried out, with the purpose of getting chemical and mineralogical characteristics of concretions found in some Brazilian soils in different ecosystems spectrophotometry was used for the chemical characterization, and x-ray diffraction and Moessbauer spectroscopy for the mineralogical characterization of the materials studied. (A.R.H.) [pt

Aspectos históricos da vulcanização Historical aspects of vulcanization

Directory of Open Access Journals (Sweden)

Helson M. da Costa

2003-06-01

Full Text Available As borrachas, para serem convertidas em materiais úteis do ponto de vista de aplicações, precisam ser misturadas a alguns ingredientes, os quais vão lhes dar as características desejadas para, então, serem vulcanizadas. Neste artigo, os aspectos históricos da vulcanização são abordados bem como a evolução dos aditivos essenciais à maioria das formulações.Rubbers, to be turned into useful materials from the commercial applications point of view, need the addition of a few other ingredients which, upon vulcanization, will impart the desired characteristics to the material. In this paper, historical aspects of vulcanization are revised as well as the evolution of the additives used in most of the formulations.

Aspectos biopsicosociales que inciden en la salud del adulto mayor Bio-psycho social aspects shattering elderly health

OpenAIRE

Aida Chong Daniel

2012-01-01

El presente trabajo trata acerca de algunos factores biosicosociales que inciden en la salud del adulto mayor, se parte del concepto de que el envejecimiento no es un proceso de causa única, sino el resultado de una compleja asociación de interacciones y modificaciones estructurales y funcionales, entre lo biológico, lo psicológico y lo socio-ambiental. Teniendo en cuenta estos elementos el objetivo de este trabajo es exponer algunos aspectos que inciden en la salud del adulto mayor, para que...

Aspectos económicos del aislamiento acústico

Directory of Open Access Journals (Sweden)

Amarilla, Beatriz C.

1990-12-01

Full Text Available The general objective of this study was to analyze the soundproofing/cost ratio with different building alternatives for interior walls and floors. This technical-economic study was divided into three parts: — Dividing walls (environmental noises — Floors (impact noises — Special Solutions (double walls, floating floors, etcetera The results show that in developing countries the most costly solutions are not always the best for housing, as far as soundproofing is concerned. A good knowledge of the economic aspects related to this matter allows obtaining a good quality at a moderate cost, which is a priority in this type of country.

El objetivo general de este trabajo fue el de analizar el comportamiento de la relación costo-aislamiento acústico en soluciones constructivas alternativas para muros interiores y entrepisos. Este estudio técnico-económico comprende tres partes: * Muros divisorios (ruidos aéreos. * Entrepisos (ruidos de impacto. * Soluciones especiales (muros de doble hoja, pisos flotantes, etc. Se llega a la conclusión que, en los países en desarrollo, no siempre las mejores soluciones para la vivienda, desde el punto de vista acústico, son las de mayor costo. Conocer en profundidad los aspectos económicos de esta cuestión significa poder lograr una buena calidad con costos moderados, lo cual constituye una prioridad en este tipo de países.

APPLYING SPECTROSCOPIC METHODS ON ANALYSES OF HAZARDOUS WASTE

OpenAIRE

Dobrinić, Julijan; Kunić, Marija; Ciganj, Zlatko

2000-01-01

Abstract The paper presents results of measuring the content of heavy and other metals in waste samples from the hazardous waste disposal site of Sovjak near Rijeka. The preliminary design elaboration and the choice of the waste disposal sanification technology were preceded by the sampling and physico-chemical analyses of disposed waste, enabling its categorization. The following spectroscopic methods were applied on metal content analysis: Atomic absorption spectroscopy (AAS) and plas...

The evolution of a LIMS (laboratory information management system). [Chemical analyses at BNFL

Energy Technology Data Exchange (ETDEWEB)

Anon.

1992-04-01

Changes in the world and United Kingdom markets for nuclear fuels during the 1990s have prompted British Nuclear Fuels (BNFL) to maximise cost effectiveness in its Chemical and Metallurgical Services department. A laboratory information management system (LIMS) was introduced in order to keep records of analytical techniques and equipment up to date by coordinating various computer systems. Wherever possible automated systems have replaced traditional, labour intensive techniques. So successful has the LIMS system been, that the team now hopes to expand into expert systems. (UK).

Aspectos negativos no modelo de reporte proposto pela GRI: a opinião das organizações que reportam

Directory of Open Access Journals (Sweden)

Thiago Ferreira-Quilice

2015-12-01

Full Text Available RESUMO O objetivo neste estudo foi identificar aspectos negativos no modelo de reporte proposto pelo Global Reporting Initiative (GRI, na opinião dos funcionários responsáveis pelo reporte. A importância deste estudo reside no fato de que poucos trabalhos investigam os relatórios de sustentabilidade a partir desse ponto de vista, e por oferecer ao GRI pontos específicos para serem melhorados. A pesquisa foi conduzida por meio da análise de conteúdo das respostas de 27 empresas à seguinte questão: que aspectos negativos você identifica no modelo de reporte proposto pelo GRI? Essa questão foi enviada a todas as empresas brasileiras que publicaram o relatório GRI, referente ao ano-base 2010, entre os anos 2011 e 2013. Como resultado, os respondentes consideraram que as empresas têm dificuldade em entender o modelo proposto pelo GRI, o qual foi considerado complexo, ambíguo e flexível demais, o que dificulta a padronização e a comparação entre os relatórios. Esse fato tem implicações para o GRI, que poderia propor uma metodologia mais simples e menos flexível.

ASPECTOS DA PRODUÇÃO CIENTÍFICA SOBRE CONTROLE GERENCIAL

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Cleyton de Oliveira Ritta

2017-09-01

Full Text Available O objetivo geral da pesquisa é avaliar aspectos da produção científica sobre controle gerencial na perspectiva da contabilidade gerencial nos periódicos internacionais da base de dados da Web of Science, disponíveis até 2014. A pesquisa caracteriza-se como descritiva com abordagem quantitativa por meio de estudo bibliométrico. Os procedimentos de coleta resultaram em 32 artigos disponíveis em 8 periódicos. Os resultados da pesquisa mostraram que: maioria dos artigos foi do tipo empírico e de natureza exploratória. O foco das pesquisas tem como temas a funcionalidade de artefatos contábeis e da estrutura do sistema de controle gerencial. A teoria da Contingência foi a principal base teórica do constructo dos artigos. Conclui-se que as pesquisas sobre controle gerencial possuem amplo campo de assuntos para futuras pesquisas. Os fenômenos organizacionais contemporâneos e as novas estruturas organizacionais demandam por estudos exploratórios para compreender a função do sistema de controle gerencial na condução dos negócios.

Role of the Chemical Weapons Convention (CWC) in Combating Chemical Terrorism

International Nuclear Information System (INIS)

Matousek, J.

2007-01-01

Main reason for concluding the CWC was preventing use of CWs in hostilities by state actors. Chemical terrorism is a broader phenomenon involving not only misuse of CWs but also of non-weaponised toxic compounds and intended strikes on industrial and social infrastructures with release of toxic, liquefied and inflammable chemicals. Nevertheless, the CWC is an important instrument in combating the most dangerous forms of international chemical terrorism. The effort of OPCW and mainly of SPs national authorities ensure that chemicals produced for peaceful purposes are not misused, provide some guarantees that terrorists will not be able to acquire or make their own CWs. That is why universality of the CWC and respective national implementation measures including comprehensive legislation are of utmost importance. The enforcement by all countries of the CWCs requirement to make the development, production, stockpiling, transfers and use of CWs illegal for anyone means that terrorist could be put on trial for violating the CWC. The OPCWs expertise and knowledge of CWs, verification regime and the system of assistance and protection under the CWC as a reflection of international co-operation are being put to use to prevent and respond to chemical terrorist strikes and thus considerably diminish their potential consequences. It can be added that pursuant to the UN SC Resolution 1540, all nations are obliged to take actions ensuring that non-State actors cannot develop, produce, use or trade CWs in the terms of the CWC. Current status of implementing the CWC is analysed with special emphasis on prevention of and response to terrorist chemical attacks.(author)

Aspectos clínico-patológicos e controle da paratuberculose em rebanho bovino leiteiro

Directory of Open Access Journals (Sweden)

Elise M Yamasaki

2010-11-01

Full Text Available A paratuberculose ou doença de Johne é uma enterite granulomatosa causada por Mycobacterium avium subsp. paratuberculosis. Descrevem-se os aspectos epidemiológicos, clínico-patológicos e laboratoriais da paratuberculose em rebanho bovino leiteiro no município de Rio Claro, região Sul do Estado do Rio de Janeiro. No período de 2006 a 2009, oito vacas adultas da raça Girolanda apresentaram diarreia crônico-intermitente e perda progressiva de peso. À necropsia, observaram-se linfonodos mesentéricos aumentados de volume e úmidos ao corte, vasos linfáticos subserosos das alças intestinais proeminentes, serosa do intestino com aspecto anelado e cerebroide e a mucosa espessada, pregueada e com aspecto microgranular. À microscopia havia, desde o duodeno até o reto, inflamação granulomatosa difusa, marcada dilatação dos vasos linfáticos no ápice das vilosidades, linfangiectasia e linfangite granulomatosa na submucosa, muscular e serosa. A inflamação granulomatosa também foi vista nos linfonodos mesentéricos. A coloração de Ziehl-Neelsen revelou variável quantidade de bacilos álcool-ácido resistentes no interior de macrófagos, de células gigantes de Langhans e livres na mucosa e submucosa dos intestinos delgado e grosso e em linfonodos mesentéricos. Em alguns animais, a lâmina própria da mucosa, principalmente do jejuno e íleo exibia acentuada hipertrofia. Mycobacterium avium subsp. paratuberculosis foi isolado em cultivo bacteriano de Herrold com micobactina, a partir de amostras de fezes, de raspado de mucosa intestinal e de leite e identificado pela técnica de PCR IS900. Através da avaliação sorológica semestral, foram analisadas 298 vacas do mesmo rebanho a partir de três anos de idade, observou-se cerca de 40% de animais reagentes ao teste ELISA indireto no período estudado. O diagnóstico da paratuberculose foi baseado nos dados clínico-patológicos, na sorologia, no isolamento e identificação do

Sistema de indicadores ambientales de la Universidad Nacional (2008-2011. Aspectos de significancia: electricidad, agua, combustible y teléfono

Directory of Open Access Journals (Sweden)

David Benavides Ramírez

2013-03-01

Full Text Available Como parte de los esfuerzos ambientales llevados a cabo por la Universidad Nacional (UNA de Costa Rica, incluyendo todas sus dependencias, oficinas, centros y sedes y el Programa UNA Campus Sostenible, nuestra institución ha consolidado en el tiempo un Sistema de Indicadores Ambientales con aspectos de significancia enmarcados en un Programa de Gestión Ambiental Institucional (PGAI, el cual mide el desempeño ambiental de la institución desde 2008, generando iniciativas como la campaña “Únase al ahorro”, la cual busca disminuir la facturación de los servicios públicos. Por medio de la aplicación de esta herramienta de evaluación ambiental, la Dirección de Gestión de Calidad Ambiental (DIGECA-MINAET y la UNA han establecido una medición del desempeño ambiental de forma estandarizada e integrada en cuatro aspectos ambientales que se mencionan a continuación: • Consumo eléctrico • Consumo de agua • Consumo de combustibles • Uso del teléfono Las principales características del modelo que impulsa el PGAI se basan en los conceptos de integración y sostenibilidad, que analizan los aspectos ambientales mencionados y las actividades asociadas para su mitigación y minimización, con el fin de llegar a una ecoeficiencia en la operatividad propia de la Universidad. Recientemente, la UNA presentó la “Actualización del Plan de Gestión Ambiental Institucional” ante la DIGECA-MINAET, el cual cumple de manera satisfactoria con lo requerido por esta Dirección, según lo establecido en el Decreto Ejecutivo 36499-S-MINAET. Se debe mencionar que este proceso se ha llevado a cabo gracias a la colaboración y participación activa de toda la comunidad universitaria y que se deben redoblar esfuerzos para continuar con esta visión ambiental propia y pionera de la UNA hacia los nuevos retos ambientales.

Aspectos claves relacionados con la gestión del e.Learning

Directory of Open Access Journals (Sweden)

Francisco Lupiáñez Villanueva

Full Text Available La introducción y uso de las Tecnologías de la Información y la Comunicación, especialmente Internet, en el ámbito de la salud, la medicina y los sistemas sanitarios enfrenta a todos los agentes e instituciones ante numerosos retos. La educación y la formación, como actividades claves tanto de la sociedad de la información como de los sistemas sanitarios, también se ven afectadas por este proceso de cambio. La finalidad de este artículo es identificar y analizar algunos de los aspectos claves relacionados con la introducción de las TIC e Internet en el ámbito de la educación médica continuada desde el punto de vista organizacional. Esta visión nos permite combinar factores pedagógicos, tecnológicos y organizativos. Todos ellos necesarios a la hora de abordar las complejas interacciones que se producen en la implantación de un proyecto de e.Learning.

Aspectos claves relacionados con la gestión del e.Learning

Directory of Open Access Journals (Sweden)

Francisco Lupiáñez Villanueva

2006-12-01

Full Text Available La introducción y uso de las Tecnologías de la Información y la Comunicación, especialmente Internet, en el ámbito de la salud, la medicina y los sistemas sanitarios enfrenta a todos los agentes e instituciones ante numerosos retos. La educación y la formación, como actividades claves tanto de la sociedad de la información como de los sistemas sanitarios, también se ven afectadas por este proceso de cambio. La finalidad de este artículo es identificar y analizar algunos de los aspectos claves relacionados con la introducción de las TIC e Internet en el ámbito de la educación médica continuada desde el punto de vista organizacional. Esta visión nos permite combinar factores pedagógicos, tecnológicos y organizativos. Todos ellos necesarios a la hora de abordar las complejas interacciones que se producen en la implantación de un proyecto de e.Learning.

Aspectos estructurales del comercio fronterizo entre México y Estados Unidos

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Bernardo González-Aréchiga

1985-01-01

Full Text Available El objetivo de esta presentación es discutir algunos aspectos estructurales de la frontera y someter a discusión la estrategia de investigación del Departamento de Estudios Económicos de CEFNOMEX. Aquí se explica cómo la frontera norte cuenta con una estructura comercial dual con patrones variables de consumo de servicios en Estados Unidos, tales como los educacionales, médicos, asistenciales, etc., que han afectado a la creación de una infraestructura local, y que la zona fronteriza del norte de México exhibe importantes distorsiones estructurales que deben estudiarse para entender sus funcionamiento económico. Es importante mejorar la base informativa con recolección directa. La investigación económica de la región requiere tanto del estudio de sus instituciones, como del monitoreo constante y cuidadoso de sus signos vitales. Una estrategia adecuada de investigación debe combinar ambos y aprovechar las complementariedades de los dos tipos de estudio.

ESTUDIO DE ASPECTOS RELEVANTES DE LOS HABITANTES DE CAZUCÁ (SECTOR 4

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Gregorio Clavijo Parrado

2007-01-01

Full Text Available Esta investigación de tipo descriptivo tuvo como objetivo general el acercamiento a la realidad social, económi - ca y demográfica de un sector de la comunidad de Cazucá, en aspectos considerados relevantes, tales como: vivienda, educación, ocupación, ingresos, gastos, edad y otros. Aunque la observación de campo se realizó en el sector cuatro de Cazucá (Soacha/Cundinamarca, se podría considerar como una muestra representativa de lo que podría estar sucediendo con el total de la comunidad. Dadas las características socioeconómicas de las familias, como unidades de observación, los resultados de - tectaron su vulnerabilidad a través de dimensiones tangibles y no tangibles relacionadas con la pobreza que, posteriormente, podrían ser objeto de indagación más profunda. Los resultados se socializarán con la comunidad y con las entidades y organismos que en Cazucá están o estén adelantando programas culturales, educativos, microempresariales y otros.

Inositol phosphates from barley low-phytate grain mutants analysed by metal-dye detection HPLC and NMR

DEFF Research Database (Denmark)

Hatzack, F.; Hübel, F.; Zhang, W.

2001-01-01

Inositolphosphates from barley low-phytate grain mutants and their parent variety were analysed by metal-dye detection HPLC and NMR. Compound assignment was carried out by comparison of retention times using a chemical hydrolysate of phytate [Ins(1,2,3,4,5,6)P(6)] as a reference; Co-inciding rete......Inositolphosphates from barley low-phytate grain mutants and their parent variety were analysed by metal-dye detection HPLC and NMR. Compound assignment was carried out by comparison of retention times using a chemical hydrolysate of phytate [Ins(1,2,3,4,5,6)P(6)] as a reference; Co...

Revisión de algunos aspectos importantes

Directory of Open Access Journals (Sweden)

J. A. Ávila

2012-01-01

Full Text Available El soporte nutricional adecuado y oportuno contribuye en la reducción del riesgo de infecciones, mejora la función inmune y el pronóstico del paciente; es por esto que se destaca la importancia de mantener un adecuado estado nutricional en los pacientes críticamente enfermos. Con este propósito, el presente documento resalta el valor de la nutrición parenteral y su papel en aquellos animales con desnutrición presente o prevista, siempre y cuando la vía enteral no esté disponible o sea insuficiente; esto, en razón de su metabolismo alterado, el cual predispone a un mayor catabolismo mus-cular. La correcta elaboración de un plan nutricional debe tener en cuenta aspectos de gran importancia como la evaluación integral de los hallazgos históricos, clínicos y paraclínicos, con el fin de detectar el grado o riesgo de desnutrición; por su parte, la selección del tipo de nutrición más adecuada y el tipo de solución por emplear, son variables igualmente relevantes pues varían según cada caso particular, dependiendo de la condición del paciente y el tipo de patologías asociadas. Así pues, el cálculo de los requerimientos calóricos y la manera en que estos serán suplementados, son variables que deben manejarse con cautela, con el fin de no exceder la capacidad metabólica y desencadenar complicaciones que representen mayor morbilidad y mortalidad. Por úl-timo, es importante resaltar que la nutrición parenteral debe descontinuarse tan pronto como sea posible para disminuir los problemas relacionados con la misma, como la atrofia gastrointestinal.

Physico-Chemical Characterization and Pollution Index ...

African Journals Online (AJOL)

Physico-Chemical Characterization and Pollution Index Determination of Leachates from Warri Waste Dumpsite, Southern Nigeria. ... This study characterizes the leachates quality of an active dumpsite in Warri, Delta State and also analyses its contamination or pollution potential. Leachate Pollution Index (LPI) - a tool for ...

Applications of high lateral and energy resolution imaging XPS with a double hemispherical analyser based spectromicroscope

International Nuclear Information System (INIS)

Escher, M.; Winkler, K.; Renault, O.; Barrett, N.

2010-01-01

The design and applications of an instrument for imaging X-ray photoelectron spectroscopy (XPS) are reviewed. The instrument is based on a photoelectron microscope and a double hemispherical analyser whose symmetric configuration avoids the spherical aberration (α 2 -term) inherent for standard analysers. The analyser allows high transmission imaging without sacrificing the lateral and energy resolution of the instrument. The importance of high transmission, especially for highest resolution imaging XPS with monochromated laboratory X-ray sources, is outlined and the close interrelation of energy resolution, lateral resolution and analyser transmission is illustrated. Chemical imaging applications using a monochromatic laboratory Al Kα-source are shown, with a lateral resolution of 610 nm. Examples of measurements made using synchrotron and laboratory ultra-violet light show the broad field of applications from imaging of core level electrons with chemical shift identification, high resolution threshold photoelectron emission microscopy (PEEM), work function imaging and band structure imaging.

REPRESENTAÇÕES DE UM GRUPO DE DOCENTES SOBRE DROGAS: ALGUNS ASPECTOS

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Cláudia Virginia Galindo Cavalcante

Full Text Available O abuso de drogas é atualmente um grave problema de saúde pública e a escola básica deve contribuir com a sua prevenção. O objetivo do trabalho foi identificar as representações sociais dos professores de um grupo de professores de educação básica sobre drogas. Utilizamos como instrumento de coleta de dados um formulário que continha a seguinte sentença: Para você, drogas são... , aplicado a um grupo de 75 docentes. Utilizando procedimentos da análise de conteúdo buscamos identificar alguns aspectos das representações destes profissionais. Verificamos que estes entendem drogas como algo extremamente maléfico, que produz danos muitas vezes irreversíveis. Programas de formação inicial e continuada devem levar em consideração estas representações e colaborar na ampliação destas.

Aspectos históricos e socioculturais da população surda

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Soraya Bianca Reis Duarte

2013-12-01

Full Text Available Resgata, contextualiza e caracteriza os aspectos sócio-históricos e culturais da comunidade surda que usa a Língua Brasileira de Sinais com enfoque no modelo socioantropológico. O objetivo deste estudo foi realizar a revisão bibliográfica em livros-textos e artigos científicos disponíveis na Biblioteca Virtual de Saúde, independentemente da data de publicação. Foram encontrados 102 artigos e 53 livros, dos quais 33 livros-textos e 26 artigos (quatro da base de dados Lilacs e 22 da Medline constituíram a amostra. Hoje, em contraste com o passado, há leis que asseguram o direito de comunicação e atendimento por meio da Língua Brasileira de Sinais. É urgente a repercussão, aceitação e inserção, nas políticas de saúde, do que estabelecem as leis brasileiras.

On the physico-chemical characteristics of brines

Digital Repository Service at National Institute of Oceanography (India)

Shirodkar, P.V.; Rao, P.V.S.S.D.P.; Singbal, S.Y.S.

Analyses of the natural brines form the salt lakes, salt pans and the artificial brines obtained after the solar desalination of seawater respectively, showed wide differences in their physico-chemical characteristics. The natural brines are markEd...

Cuidadores de crianças com câncer: aspectos da vida afetados pela atividade de cuidador Cuidantes de niños con cáncer: aspectos de la vida afectados por la actividad de cuidar Caregivers of children with cancer: aspects of life affectcet by the caregiver role

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Ana Raquel Medeiros Beck

2007-12-01

Full Text Available Pretendeu-se, neste estudo, descrever como as atividades relacionadas ao cuidar afetam a vida de cuidadores de crianças com câncer, o grau de dependência da criança para desempenhar as atividades de vida diária (AVD, o grau de ajuda recebida de outros e o quanto alguns aspectos da vida do cuidador são afetados pela atividade de cuidar. O estudo foi descritivo, comparativo e transversal. Foram entrevistados 50 cuidadores de crianças entre três e dez anos num hospital infantil, referência no tratamento de doenças onco-hematológicas, em Campinas, SP. As atividades relacionadas ao cuidar ocasionaram sérios prejuízos na vida dos cuidadores. Portanto, avaliar estes aspectos pode auxiliar o enfermeiro a evidenciar, amenizar e planejar a assistência aos cuidadores de crianças com câncer.Se pretendió en este estudio describir de que forma las actividades relacionadas al cuidar afectan la vida de los cuidantes de niños con cáncer, el grado de dependencia del niño para desempeñar las actividades de la vida diaria (AVD, el grado de ayuda recibida de otros, y en que medida algunos aspectos da la vida del cuidante eran afectados por la actividad de cuidar. El estudio fué descriptivo, comparativo y transversal. Fueron entrevistados 50 cuidantes de niños entre 3 y 10 años en un hospital infantil modelo en el tratamiento de dolencias onco-hematológicas, en Campinas, SP. Las actividades relacionadas al cuidar ocasionaron serios daños en la vida de los cuidantes. Por lo tanto, evaluar estos aspectos puede auxiliar al enfermero a identificar, amenizar y planear la asistencia a los cuidantes de niños con cáncer.This study aimed at demonstrating that the caregiving role affected the lives of caregivers of children with cancer, the child's degree of dependence regarding the performance of daily life activities (DLA, the degree of help offered by others and the degree to which some aspects of the caregiver's life were affected by caregiving

El consulado genovés de Sevilla (siglos XIII-XV. Aspectos jurisdiccionales, comerciales y fiscales

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José Damián GONZÁLEZ ARCE

2011-02-01

Full Text Available El presente artículo analiza el funcionamiento del consulado genovés de Sevilla, entre los siglos XIII y XV, a partir de los privilegios concedidos por los reyes castellanos y otros documentos donde se contienen noticias sobre la actividad de estos italianos. En primer lugar, se estudian las competencias jurisdiccionales de dicho consulado y las facultades judiciales de sus cónsules. Luego son descritas las actividades mercantiles de la colonia ligur en el marco del consulado, así como otros aspectos ligados al comercio, como seguros y transportes. Y, finalmente, las exacciones fiscales a las que fueron sometidas esta colonia y las mercancías con las que traficó.

Aspectos históricos de libros relevantes de la historia de la Pediatría

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Alfonso Vargas Rubiano

1999-10-01

Full Text Available El comité Editorial de Pediatría, Diagnostico y Tratamiento, me ha solicitado la redacción del Prólogo para su segunda edición, "deseando que se haga mención de algunos aspectos históricos del desarrollo de la Pediatría en la Universidad Nacional de Colombia y la contribución a éste proceso del profesor José Ignacio Barberi y del Hospital de la Misericordia." Para cumplir tan obligante invitación de los profesores Edgar Rojas, Hector Ulloque, Fernando Sarmiento y Carlos Medina, he revisado la bibliografia pediátrica de nuestra universidad -desde 1828- y del Hospital de la Misericordia en la actual centuria.

Aspectos históricos dos estudos caso-controle

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Rêgo Marco Antônio Vasconcelos

2001-01-01

Full Text Available Este texto apresenta um relato da evolução dos estudos de caso-controle (ECC até o final dos anos 80. A comparação de dois grupos quanto à exposição a um fator de risco é verificada desde o século XVII. A segunda metade do século XIX significou o declínio da Epidemiologia das "populações", e os primeiros ECC só foram realizados na década de 20. O avanço do método ocorreu na segunda metade do século, com destaque para as investigações sobre câncer de pulmão e hábito de fumar. As principais contribuições dos estudiosos do método foram o uso da odds ratio como estimativa do risco relativo; a definição dos aspectos estatísticos da análise de dados de estudos retrospectivos; o cálculo do risco atribuível e da fração etiológica para ECC; e a discussão da essência dos ECC. Os críticos referiam as fragilidades do método e a susceptibilidade aos bias. Conclui-se que os ECC tiveram aplicação crescente nas últimas décadas, sendo utilizados em diversas áreas da epidemiologia, constituindo-se em um importante instrumento para as ações de Saúde Pública.

Algunos aspectos en el diseño hidráulico y económico de redes en sistemas de riego por goteo

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Edgar Gómez

1984-01-01

Full Text Available En el presente trabajo se dan algunos aspectos procedimentales que son útiles para elaborar el diseño de la red de conducción, distribución y entrega de un sistema de riego por goteo, criterios que permiten conjugar el diseño hidráulico y el económico.

Fourier Transform Mass Spectrometry: The Transformation of Modern Environmental Analyses

Science.gov (United States)

Lim, Lucy; Yan, Fangzhi; Bach, Stephen; Pihakari, Katianna; Klein, David

2016-01-01

Unknown compounds in environmental samples are difficult to identify using standard mass spectrometric methods. Fourier transform mass spectrometry (FTMS) has revolutionized how environmental analyses are performed. With its unsurpassed mass accuracy, high resolution and sensitivity, researchers now have a tool for difficult and complex environmental analyses. Two features of FTMS are responsible for changing the face of how complex analyses are accomplished. First is the ability to quickly and with high mass accuracy determine the presence of unknown chemical residues in samples. For years, the field has been limited by mass spectrometric methods that were based on knowing what compounds of interest were. Secondly, by utilizing the high resolution capabilities coupled with the low detection limits of FTMS, analysts also could dilute the sample sufficiently to minimize the ionization changes from varied matrices. PMID:26784175

Simulation of square wave voltammetry of three electrode reactions coupled by two reversible chemical reactions

OpenAIRE

Lovrić, Milivoj

2017-01-01

Three fast and reversible electrode reactions that are connected by two reversible chemical reactions that are permanently in the equilibrium are analysed theoretically for square wave voltammetry. The dependence of peak potentials on the dimensionless equilibrium constants of chemical reactions is calculated. The influence of the basic thermodynamic parameters on the square wave voltammetric responses is analysed.

Relação da autoestima entre a percepção de saúde e aspectos sociodemográficos de idosos praticantes de exercício físico

OpenAIRE

Antunes, Giselli; Mazo, Giovana Zarpellon; Balbé, Giovane Pereira

2011-01-01

O objetivo deste estudo foi comparar a percepção de autoestima e de saúde com os aspectos sociodemográficos de idosos praticantes de exercício físico, conforme o sexo. A amostra foi composta de 165 idosos praticantes de exercícios físicos com idade média de 69,14 anos (DP=6,04). A autoestima foi avaliada pela escala de Rosenberg, e a percepção de saúde e os aspectos sociodemográficos, por meio de perguntas estruturadas. Utilizou-se a estatística descritiva e testes não paramétricos, com p...

ASPECTOS COMPOSICIONAIS, PROPRIEDADES FUNCIONAIS, NUTRICIONAIS E SENSORIAIS DO LEITE DE CABRA: UMA REVISÃO

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Danielle Barros Cenachi

2011-10-01

Full Text Available O objetivo deste trabalho foi realizar uma revisão de literatura sobre aspectos composicionais e propriedades funcionais, nutricionais e sensoriais do leite de cabra aplicados à sua tecnologia de processamento. A escassez de publicações contendo informações específicas sobre o leite de cabra motivou a realização deste artigo. Para a realização da revisão bibliográfica foi feita uma busca de artigos científicos nas bases de dados da SpringLink, Nature, Scientific Electronic Library Online, principalmente, acessados através do portal de periódicos da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior por intermédio do Sistema Integrado de Gestão Acadêmica da UFJF. As principais palavras-chave utilizadas como descritor do assunto foram "leite de cabra" em português, em inglês "goat milk" e em espanhol "leche de cabra". O leite de cabra tem um importante papel como fonte de cálcio, de gordura de elevada digestibilidade, de proteína de alto valor biológico e hipoalergenicidade. Comparando o leite caprino com o leite bovino em relação aos aspectos composicionais, observou-se que os leites das duas espécies são distintos. Informações específicas sobre o leite de cabra facilitam o seu processamento e desenvolvimento de novos produtos a partir deste. As propriedades nutricionais e funcionais do leite de cabra justificam sua singularidade e demonstram que o leite caprino e seus produtos representam um nicho promissor para diversificar e inovar a indústria láctea. As propriedades sensoriais relativas ao sabor e odor do leite de cabra representam dificuldades para a sua aceitação, sendo necessárias pesquisas para melhorar estas características.

Aspectos Socioambientais associados à ocorrência de Dengue em um Município do estado do Mato Grosso

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Bárbara Pellissari Pellissari

2016-01-01

Full Text Available Justificativa e Objetivos: a dengue apresenta-se como um dos problemas mais significativos do mundo em relação à saúde pública. Sua expansão geodemográfica entre as unidades federadas do Brasil preocupam as autoridades sanitárias e profissionais de saúde. O Brasil é um país de clima tropical, com variações pluviométricas heterogêneas de acordo com cada região, o que pode influenciar direto a prevalência deste agravo em âmbito sistêmico. Considerando o exposto, o objetivo do presente estudo foi analisar a relação dos aspectos socioambientais com os casos de dengue no município de Primavera do Leste/MT entre os anos de 2010 a 2012. Métodos: pesquisa quantitativa, de característica descritiva e transversal, realizada a partir de dados secundários obtidos através de Sistemas de Informação de Agravos Notificáveis, Sistema de Informação de Febre Amarela e do Instituto Mato Grossense do Algodão. Resultados: o acúmulo e lixo ao redor dos domicílios foi um ponto relevante detectado no estudo, assim como o predomínio de depósitos artificiais passíveis de remoção/proteção no peri-domicílio que apontou ter valor no índice de infestação do vetor, o que leva a indicar maior influência das condicionantes sociais, que pode estar associado com aspectos de hábitos culturais da população. Conclusão: não foi possível associar o aumento ou a redução dos números de casos com os fatores climáticos, já que praticamente não ocorreu variação de temperatura e pluviosidade. O estudo mostrou ser relevante levar em consideração os aspectos culturais da população de cada região, já que as formas de controle da dengue estão intrinsecamente ligadas às variáveis socioambientais. DESCRITORES: Dengue. Vigilância Epidemiológica. Prevenção Primária.

Reactive chemicals and process hazards

International Nuclear Information System (INIS)

Surianarayanan, M.

2016-01-01

Exothermic chemical reactions are often accompanied by significant heat release, and therefore, need a thorough investigation before they are taken to a plant scale. Sudden thermal energy releases from exothermic decompositions and runaway reactions have contributed to serious fire and explosions in several chemical process plants. Similarly, thermal runaway had also occurred in storage and transportation of reactive chemicals. The secondary events of thermal runaway reactions can be rupture of process vessel, toxic spills and release of explosive vapor clouds or combination of these also. The explosion hazards are governed by the system thermodynamics and kinetics of the thermal process. Theoretical prediction of limiting temperature is difficult due to process complexities. Further, the kinetic data obtained through classical techniques, at conditions far away from runaway situation, is often not valid for assessing the runaway behavior of exothermic processes. The main focus of this lecture is to discuss the causes and several contributing factors for thermal runaway and instability and present analyses of the methodologies of the new instrumental techniques for assessing the thermal hazards of reactive chemicals during processing, storage and transportation. (author)

Non-allergic cutaneous reactions in airborne chemical sensitivity--a population based study.

Science.gov (United States)

Berg, Nikolaj Drimer; Linneberg, Allan; Thyssen, Jacob Pontoppidan; Dirksen, Asger; Elberling, Jesper

2011-06-01

Multiple chemical sensitivity (MCS) is characterised by adverse effects due to exposure to low levels of chemical substances. The aetiology is unknown, but chemical related respiratory symptoms have been found associated with positive patch test. The purpose of this study was to investigate the relationship between cutaneous reactions from patch testing and self-reported severity of chemical sensitivity to common airborne chemicals. A total of 3460 individuals participating in a general health examination, Health 2006, were patch tested with allergens from the European standard series and screened for chemical sensitivity with a standardised questionnaire dividing the participants into four severity groups of chemical sensitivity. Both allergic and non-allergic cutaneous reactions--defined as irritative, follicular, or doubtful allergic reactions--were analysed in relationship with severity of chemical sensitivity. Associations were controlled for the possible confounding effects of sex, age, asthma, eczema, atopic dermatitis, psychological and social factors, and smoking habits. In unadjusted analyses we found associations between allergic and non-allergic cutaneous reactions on patch testing and the two most severe groups of self-reported sensitivity to airborne chemicals. When adjusting for confounding, associations were weakened, and only non-allergic cutaneous reactions were significantly associated with individuals most severely affected by inhalation of airborne chemicals (odds ratio = 2.5, p = 0.006). Our results suggest that individuals with self-reported chemical sensitivity show increased non-allergic cutaneous reactions based on day 2 readings of patch tests. Copyright © 2011 Elsevier GmbH. All rights reserved.

Revisión de indicadores de comunicación de aspectos ambientales para el consumo de productos sustentables

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Gabriel Cereceda

2012-12-01

Full Text Available Si consideramos que la viabilidad de todo Desarrollo pasa por su factibilidad económica y que la base de toda economía es el consumo de bienes, podríamos decir que la viabilidad económica de un Desarrollo Sustentable pasa por el consumo de productos Sustentables. Esto nos lleva a que como sociedad debemos cambiar comportamientos y hábitos de consumo, pero no la manera de consumir, pues desestabilizaríamos el sistema económico actual. En tal sentido, el consumo de estos bienes, pasa por la capacidad de éstos para diferenciarse de los productos tradicionales y de comunicar sus aspectos ambientales. Históricamente, el instrumento utilizado para este fin ha sido la Ecoetiqueta, pero ésta no ha logrado influenciar las decisiones de compra y ha causado confusión en los consumidores principalmente por el tipo de indicadores que utiliza para comunicar los aspectos ambientales de un producto y la manera de hacerlo. De este modo, la definición de indicadores mixtos que permitan generar estándares de comparación entre productos similares; el uso de información clara que disminuya la asimetría de información en el mercado; y una información creíble, certificada por una tercera parte, parecen ser la solución al problema de comunicación para el consumo de productos sustentables.

Aspectos morfométricos do timo em gatos domésticos (Felis domesticus

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Camila E. Barroso

2012-12-01

Full Text Available O timo é um órgão linfático primário que desenvolve sua atividade em organismos jovens. Apesar de sua função ser responsável por mecanismos fundamentais na aquisição das defesas e conseqüentes respostas orgânicas, ela ainda não está totalmente esclarecida, nem tampouco as bases morfológicas que respondem por tais funções, como o processo de desenvolvimento e involução do órgão. Objetivou-se analisar e caracterizar os aspectos morfológicos do timo, tais como seu tamanho e volume, e aspectos histológicos do timo em gatos, correlacionando o sexo e o desenvolvimento etário. Doze timos provenientes de fetos de gatos domésticos (Felis domesticus sem raça definida (SRD, machos e fêmeas, separados em três grupos etários. O timo apresentou-se com uma coloração rosa-pálida e com duas porções, a torácica e a cervical, sendo que cada uma delas possuía um lobo direito e um lobo esquerdo em sua maioria. A porção torácica localizava-se em região de mediastino cranial, entre os pulmões e à base do coração. E a porção cervical estendia-se além das costelas em sentido cranial, estando localizada ventralmente à traqueia. A estrutura celular do timo demonstrou-se organizada com a presença de agregados concêntricos, os chamados corpúsculos tímicos, formados por células epiteliais, sustentada por uma cápsula de tecido conjuntivo de onde partiam septos que ao penetrar no órgão dividia-o em lóbulos. Ocorreram variações significativas quanto à lobação e as dimensões do timo entre indivíduos da mesma faixa etária, e entre sexos diferentes. Os valores relativos ao comprimento, espessura e largura, de maneira geral, apresentaram aumento, em conformidade ao desenvolvimento dos animais, mas com diferenças entre os sexos.

Effect of plant chemicals on the behavior of the Mediterranean fruit fly

International Nuclear Information System (INIS)

Papadopoulos, N.T.; Kouloussis, N.A.; Katsoyannos, B.I.

2006-01-01

A review of current information on the relation between plant chemicals and the Mediterranean fruit fly is presented. The influence of age and adult physiology on the response of med flies to plant chemicals is studied. The effect of plant chemicals on med fly behavior during host finding, mating and oviposition is analysed. The possible influence of plant chemicals on the dispersion patterns and spatial distribution of the fly is also addressed. (MAC)

Effect of plant chemicals on the behavior of the Mediterranean fruit fly

Energy Technology Data Exchange (ETDEWEB)

Papadopoulos, N.T., E-mail: nikopap@uth.g [University of Thessaly (Greece). Dept. of Crop Production and Rural Environment. Lab. of Entomology and Agricultural Zoology; Kouloussis, N.A.; Katsoyannos, B.I. [University of Thessaloniki, Thessaloniki (Greece). School of Agriculture

2006-07-01

A review of current information on the relation between plant chemicals and the Mediterranean fruit fly is presented. The influence of age and adult physiology on the response of med flies to plant chemicals is studied. The effect of plant chemicals on med fly behavior during host finding, mating and oviposition is analysed. The possible influence of plant chemicals on the dispersion patterns and spatial distribution of the fly is also addressed. (MAC)

Malária pulmonar: aspectos na tomografia computadorizada de alta resolução - relato de caso

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Rodrigues Rosana

2004-01-01

Full Text Available Neste trabalho é relatado o caso de paciente do sexo masculino, de 38 anos de idade, que desenvolveu quadro de malária com comprometimento pulmonar. A tomografia computadorizada de alta resolução evidenciou espessamento de septos interlobulares e de bainhas peribroncovasculares, com áreas esparsas de atenuação em vidro fosco e de consolidações, além de derrame pleural bilateral, aspectos compatíveis com edema pulmonar. O paciente recebeu tratamento específico, evoluindo bem e tendo alta 11 dias após a internação.

Aspectos celulares novedosos en los mecanismos de embriogénesis

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Sara Elena Panizo Bruzón

2014-08-01

Full Text Available La decodificación del genoma humano inició una nueva era en la investigación científica, sobre todo en aquellos campos que involucran eventos celulares y, por consiguiente, a los mecanismos morfogenéticos básicos. Por su importancia, se realiza una revisión bibliográfica, con el objetivo de actualizar en aspectos relacionados con los fundamentos de los mecanismos morfogenéticos básicos. Para la revisión se emplearon los recursos disponibles en la red Infomed, se consultaron las bases de datos Medline y PubMed. En el estudio se indica que los mecanismos morfogenéticos son eventos celulares o fenómenos biológicos, cuya investigación actual intenta explicar, desde un nivel celular, subcelular o molecular, por qué se desencadenan las transformaciones expuestas por la embriología. Se describen los mecanismos morfogenéticos, teniendo en cuenta los últimos conocimientos generados al respecto, evidenciándose que cuando existen deficiencias en ellos, aparecen los defectos en el desarrollo. Se hace referencia a investigaciones que utilizan estos conocimientos a nivel celular, para comprender la génesis de enfermedades y desarrollar novedosos tratamientos

Analyses of soft tissue from Tyrannosaurus rex suggest the presence of protein.

Science.gov (United States)

Schweitzer, Mary Higby; Suo, Zhiyong; Avci, Recep; Asara, John M; Allen, Mark A; Arce, Fernando Teran; Horner, John R

2007-04-13

We performed multiple analyses of Tyrannosaurus rex (specimen MOR 1125) fibrous cortical and medullary tissues remaining after demineralization. The results indicate that collagen I, the main organic component of bone, has been preserved in low concentrations in these tissues. The findings were independently confirmed by mass spectrometry. We propose a possible chemical pathway that may contribute to this preservation. The presence of endogenous protein in dinosaur bone may validate hypotheses about evolutionary relationships, rates, and patterns of molecular change and degradation, as well as the chemical stability of molecules over time.

Aspectos teóricos para el estudio sociodemográfico del embarazo adolescente

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Humberto Gónzalez Galbán

2000-01-01

Full Text Available El embarazo adolescente se presenta como un tópico de interés en una buena parte de los países del mundo actualmente. Ello se explica tanto por la gran incidencia que tiene en numerosas regiones como por las implicaciones sociales, familiares y personales a que es vinculado. Esta situación ha motivado la realización de investigaciones en las que las gestaciones en edades tempranas son centro de atención, sin embargo, en estos estudios el tema es presentado generalmente de manera inadecuada. En este articulo se retoma, desde el punto de vista sociodemográfico, el análisis de aspectos teóricos sobre el embarazo adolescente, presentando críticamente la forma en que es problematizado, así como los diferentes supuestos que es posible encontrar en la literatura especializada sobre el tema.

Nuevos materiales didácticos para descubrir los aspectos más cotidianos de la Electroquímica

OpenAIRE

Arán-Ais, Rosa M.; Busó-Rogero, Carlos; Chumillas, Sara; Climent, Víctor; Herrero, Enrique; Aldaz Riera, Antonio; Feliu, Juan M.

2014-01-01

A pesar del amplio abanico de aplicaciones que posee la electroquímica, con importantes repercusiones en muchos aspectos de la vida cotidiana, los egresados de química de las universidades españolas poseen en general un notable desconocimiento de esta materia. Con objeto de hacer más atractivo el aprendizaje de esta parte de la química, al tiempo que se revelan algunas de sus aplicaciones menos conocidas, se han preparado nuevos materiales didácticos. En ellos se describen de manera divulgati...

Aspectos entomológicos e epidemiológicos das epidemias de dengue em Fortaleza, Ceará, 2001-2012

OpenAIRE

Oliveira, Rhaquel de Morais Alves Barbosa; Araújo, Fernanda Montenegro de Carvalho; Cavalcanti, Luciano Pamplona de Góes

2018-01-01

Resumo Objetivo: descrever os aspectos entomológicos e epidemiológicos das epidemias de dengue ocorridas em Fortaleza, Ceará, Brasil, de 2001 a 2012. Métodos: estudo descritivo com dados dos Sistemas de Informação de Agravos de Notificação (Sinan), de Informações Hospitalares (SIH), do Programa de Febre Amarela e Dengue (2001-2009), do Programa Nacional de Controle da Dengue (2010-2012) e Levantamento Rápido do Índice de Infestação de Aedes aegypti, referentes aos anos quando a incidência...

Análisis de los aspectos lingüísticos en casos prácticos de afasia fluente

OpenAIRE

Bidoggia, Federica

2014-01-01

El presente trabajo analiza algunos de los aspectos más importantes del trastorno del lenguaje de afasia. Se propone de confrontar y explicar las diferentes formas de afasia y la tipología de errores que cometen los pacientes que sufren de esta enfermedad (desde el punto de vista semántico, sintáctico-gramatical, fonológico y lexical). El objetivo que se quiere alcanzar es lo de ver y analizar cuáles son esos errores y también demostrar que las personas que tienen afasia fluente, que supuesta...

Aspectos a considerar en una actualización de la normativa nacional en materia de legionelosis

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Eduardo Forján Lozano

2016-03-01

Full Text Available Objetivo: En España, el vigente Real Decreto 865/2003 establece una serie de medidas destinadas a la prevención de la legionelosis que inciden especialmente en el mantenimiento de las instalaciones de riesgo relacionadas con la proliferación y transmisión de Legionella. Este trabajo pretende revisar determinados aspectos estructurales, de mantenimiento, operacionales y documentales que, desde el punto de vista del Control Oficial, podrían ser incluidos en una futura nueva norma que pudiera ser más efectiva, si cabe, en la prevención y control de la legionelosis en las instalaciones de riesgo. Materiales y Métodos: Se ha utilizado la normativa nacional vigente en materia de la legionelosis, documentación técnica de apoyo, otras normativas de aplicación en países de la Unión Europea, así como servicios en línea de información científica (ISI Web of Knowledge y bases de datos de bibliografía médica (MEDLINE PubMed. Resultados y Discusión: Tras más de una década en vigor, es necesario que ciertos aspectos técnicos de las instalaciones de riesgo en la transmisión de la legionelosis sean revisados y adecuados al conocimiento actual y a la experiencia adquirida. Entre ellos se encuentran la clasificación de riesgo de las instalaciones, aspectos técnicos y operacionales de los sistemas de agua fría de consumo humano y caliente sanitaria, de los equipos de enfriamiento evaporativos, de los sistemas de agua climatizada y de los procedimientos de toma de muestras. Por último, se discute sobre la inclusión de técnicas analíticas basadas en la Biología Molecular (qPCR como método oficial en la determinación de Legionella. Conclusiones: Una posible nueva normativa sobre prevención y control de la legionelosis debe contemplar una clasificación de las instalaciones en función del riesgo, que recoja las de reciente aparición que han sido asociadas a brotes. También deberá contar con anexos sobre las medidas preventivas

Chemical constituents of Zanthoxylum ekmanii (URB.) Alain

International Nuclear Information System (INIS)

Facundo, Valdir Alves; Silveira, Augusto Sergio Pinto da; Braz Filho, Raimundo; Pinto, Angelo C.; Rezende, Claudia M.

2005-01-01

Chemical investigation of Z. ekmanii resulted in the isolation of skimmianine, dictamnine, tembamide, sesamin, lupeol and β-sitosterol. The structures were established by spectroscopic analyses. This is the first report on the phytochemical study of the roots and leaves of Z. ekmanii. (author)

Chemical effects in the mine structure

International Nuclear Information System (INIS)

1992-02-01

The main objective of the workshop was to bring together, and get talking to each other, long-term safety modellers, geochemical modellers and experimenters working in the field of chemical effects, and to give an insight into their respective activity areas and problem constellations. Lectures on the following subjects were given: modelling of chemical effects in long-term safety analysis; influence of brines; corrosion experiments; sorption experiments; actinide chemistry experiments; geochemical modelling; requirements of safety analyses and geochemical modelling. The workshop concluded with a detailed discussion of the subjects raised and of interdisciplinary aspects. (orig./DG) [de

Chemical analyses and calculation of isotopic compositions of high-burnup UO{sub 2} fuels and MOX fuels

Energy Technology Data Exchange (ETDEWEB)

Matsumura, Tetsuo; Sasahara, Akihiro [Central Research Inst. of Electric Power Industry, Tokyo (Japan)

2001-08-01

Chemical analysis activities of isotopic compositions of high-burnup UO{sub 2} fuels and MOX fuels in CRIEPI and calculation evaluation are reviewed briefly. C/E values of ORIGEN2, in which original libraries and JENDL-3.2 libraries are used, and other codes with chemical analysis data are reviewed and evaluated. Isotopic compositions of main U and Pu in fuels can be evaluated within 10% relative errors by suitable libraries and codes. Void ratio is effective parameter for C/E values in BWR fuels. JENDL-3.2 library shows remarkable improvement compared with original libraries in isotopic composition evaluations of FP nuclides. (author)

Fourier Transform Mass Spectrometry: The Transformation of Modern Environmental Analyses

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Lucy Lim

2016-01-01

Full Text Available Unknown compounds in environmental samples are difficult to identify using standard mass spectrometric methods. Fourier transform mass spectrometry (FTMS has revolutionized how environmental analyses are performed. With its unsurpassed mass accuracy, high resolution and sensitivity, researchers now have a tool for difficult and complex environmental analyses. Two features of FTMS are responsible for changing the face of how complex analyses are accomplished. First is the ability to quickly and with high mass accuracy determine the presence of unknown chemical residues in samples. For years, the field has been limited by mass spectrometric methods that were based on knowing what compounds of interest were. Secondly, by utilizing the high resolution capabilities coupled with the low detection limits of FTMS, analysts also could dilute the sample sufficiently to minimize the ionization changes from varied matrices.

Lipid Adjustment for Chemical Exposures: Accounting for Concomitant Variables

Science.gov (United States)

Li, Daniel; Longnecker, Matthew P.; Dunson, David B.

2013-01-01

Background Some environmental chemical exposures are lipophilic and need to be adjusted by serum lipid levels before data analyses. There are currently various strategies that attempt to account for this problem, but all have their drawbacks. To address such concerns, we propose a new method that uses Box-Cox transformations and a simple Bayesian hierarchical model to adjust for lipophilic chemical exposures. Methods We compared our Box-Cox method to existing methods. We ran simulation studies in which increasing levels of lipid-adjusted chemical exposure did and did not increase the odds of having a disease, and we looked at both single-exposure and multiple-exposures cases. We also analyzed an epidemiology dataset that examined the effects of various chemical exposures on the risk of birth defects. Results Compared with existing methods, our Box-Cox method produced unbiased estimates, good coverage, similar power, and lower type-I error rates. This was the case in both single- and multiple-exposure simulation studies. Results from analysis of the birth-defect data differed from results using existing methods. Conclusion Our Box-Cox method is a novel and intuitive way to account for the lipophilic nature of certain chemical exposures. It addresses some of the problems with existing methods, is easily extendable to multiple exposures, and can be used in any analyses that involve concomitant variables. PMID:24051893

Aspectos Fisiológicos de Orquídeas Cortadas.

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Claudia Fabrino Machado Mattiuz

2006-06-01

Full Text Available A família Orchidaceae possui grande diversidade de espécies e híbridos, suas flores destacam-se pelo tamanho, forma e combinação de cores, características que contribuem cada vez mais para a sua apreciação. Na Floricultura, é muito apreciada como planta envasada, e, atualmente, devido ao aumento da demanda de material cortado para exportação, o cultivo de espécies com características para o corte tem sido considerado promissor principalmente para orquídeas dos gêneros Oncidium, Cymbidium, Dendrobium, Phalaenopsis e Catleya. No entanto, o material para corte ainda permanece aquém de sua potencialidade, havendo poucas informações disponíveis para o aprimoramento das técnicas de pós-colheita. A perda da qualidade das flores cortadas está relacionada com vários processos fisiológicos, com possíveis interações entre os diversos componentes florais e também com fatores qualitativos. O presente trabalho tem como objetivo informar aspectos da fisiologia póscolheita de orquídeas para corte, relacionados com a manutenção da qualidade e longevidade floral; como a senescência, estádio de desenvolvimento, relações hídricas, respiração, substratos de reserva, bloqueio vascular e hormônios vegetais.

“Mobbing” o acoso laboral: revisión de los principales aspectos teórico-metodológicos que dificultan su estudio

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Jordi Escartín-Solanelles

2009-01-01

Full Text Available En los últimos años ha habido un creciente interés científico y social en el estudio del mobbing o abuso psicológico en el lugar de trabajo, profundizándose en aspectos tales como su delimitación o su prevención. Este trabajo teórico tiene como objetivo realizar una exhaustiva revisión de las investigaciones existentes en este campo, mostrando las distintas aproximaciones y modelos teóricos predominantes y, aspectos tales como las formas y componentes del mobbing, sus antecedentes o la forma en que este fenómeno ha sido históricamente medido. Del mismo modo, este estudio ofrece una aproximación acerca de las dificultades teórico-metodológicas en el estudio del mobbing, resaltando distintas problemáticas como su componente cultural, su subjetividad, la pertinencia de considerar a terceros, la alta invisibilidad de sus conductas o la borrosidad en su frecuencia. De este modo, se pretende contribuir a una optimización de los esfuerzos para la presente y futura investigación sobre el fenómeno.

Sorption analyses in materials science: selected oxides

International Nuclear Information System (INIS)

Fuller, E.L. Jr.; Condon, J.B.; Eager, M.H.; Jones, L.L.

1981-01-01

Physical adsorption studies have been shown to be extremely valuable in studying the chemistry and structure of dispersed materials. Many processes rely on the access to the large amount of surface made available by the high degree of dispersion. Conversely, there are many applications where consolidation of the dispersed solids is required. Several systems (silica gel, alumina catalysts, mineralogic alumino-silicates, and yttrium oxide plasters) have been studied to show the type and amount of chemical and structural information that can be obtained. Some review of current theories is given and additional concepts are developed based on statistical and thermodynamic arguments. The results are applied to sorption data to show that detailed sorption analyses are extremely useful and can provide valuable information that is difficult to obtain by any other means. Considerable emphasis has been placed on data analyses and interpretation of a nonclassical nature to show the potential of such studies that is often not recognized nor utilized

La relación costo-calidad. Algunos aspectos económicos del confort térmico

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Amarilla, Beatriz Cecilia

1994-02-01

Full Text Available This paper proposes a methodology for joint analysis of cost and quality in dwelling buildings. In order to give an illustrative example of the application of this methodology, the "cost" referred to the construction, maintenance and energy for heating, while the "quality", in its turn, referred to some aspects of thermal comfort. The authors try to prove that there is not always a directly proportional relation between the cost of buildings and the real quality reached in them. Bioclimatic, social, economic, technological and morphological variables have been analyzed. The final objective is to obtain a "weighting cost" (cost according to the achieved thermal benefit. This allows the determination of an order of priorities among various alternative solutions proposed for mass construction of dwellings.

El presente trabajo propone una metodología para analizar conjuntamente aspectos de costo y calidad en los edificios para vivienda. A los efectos de ilustrar mediante un ejemplo de aplicación de dicha metodología, el "costo" se ha referido a la construcción, mantenimiento y energía para calefacción; la "calidad", por su parte, se ha identificado con algunos aspectos del confort térmico. Se intenta demostrar que no siempre existe una relación directamente proporcional entre el costo de los edificios y las calidades objetivas que en ellos se alcanzan. Se estudiaron y relacionaron variables de tipo bioclimático, social, económico, tecnológico y morfológico. El objetivo final es obtener un "costo ponderado" (costo en relación al beneficio térmico conseguido. Ello permite determinar un orden de prioridades entre varias soluciones alternativas que se proponen para la construcción masiva de viviendas.

Aspectos psicossociais da Síndrome da Imunodeficiência Adquirida Psychosocial aspects of Acquired Immuno Deficiency Syndrome

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Ludmila de Moura

1991-04-01

Full Text Available Foram abordados os aspectos psicossociais que envolvem as pessoas atingidas direta ou indiretamente pela AIDS: pacientes, familiares e equipe profissional. Os resultados evidenciam que a população assistida na região de Ribeirão Preto, SP (Brasil, é predominantemente jovem, masculina e de toxicômanos. Os pacientes com resultado positivo apresentam reações semelhantes às definidas por Kluber-Ross (1977, para pacientes terminais. Os comportamentos observados nos familiares estão num contínuo entre a negação da doença e a superproteção do paciente. Para os profissionais, as reações mais freqüentes são de perplexidade diante de uma população diferente das que estão acostumados a lidar. Os dados obtidos indicam que o psicólogo pode auxiliar os profissionais a lidarem com as reações dos pacientes, integrando-os em seus aspectos orgânicos e emocionais.Psychosocial aspects which arise with regard to people directly or indirectly involved with AIDS: patients, relatives and professional staff, are studied. The results show that the population assisted in the Ribeirão Preto region is predominantly young, male and drug-addicted. The patients with "positive" results show reactions similar to those described by Kluber-Ross (1977 for terminal patients. The behavior observed in relatives forms a continuum which varies from the negation of the illness to the overprotection of the patient. For the professionals, perplexity is the most common reaction when they face a population which is different from that with which they are used to dealing. Finally, the data acquired indicate that the psychologist can help the professionals to deal with the reactions of the patients by integrating them into their organic and emotional aspects.

Estado nutricional y aspectos alimentarios de mujeres indígenas del departamento de Presidente Hayes, Paraguay

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Gloria Echagüe

2015-12-01

Full Text Available Introducción: Las comunidades indígenas presentan un mayor riesgo de inseguridad alimentaria y malnutrición, menor disponibilidad de recursos, y una creciente dependencia de alimentos más baratos aunque con un alto grado de procesamiento. Objetivo: Identificar el estado nutricional y aspectos alimentarios en mujeres indígenas de tres comunidades del Departamento de Presidente Hayes, Chaco Paraguayo. Metodología: Estudio observacional de diseño transversal con componente analítico, que incluyó a 81 mujeres de 15 a 44 años de edad, de las etnias Maká y Toba Qom. Previo consentimiento informado, se realizó la valoración nutricional y la entrevista para obtener los datos sociodemográficos y alimentarios. Resultados: Las mujeres indígenas presentaron una frecuencia de sobrepeso de 30,8% y obesidad del 21,0%, mientras que el 1,2 % presentó desnutrición. No encontramos diferencia significativa entre las etnias, en relación al sobrepeso y obesidad, (p>0,05. Observamos que las indígenas tenían una alta ingesta de frutas, azúcares y mieles. El 87 y 88% de las mujeres indígenas de ambas etnias estudiadas refirieron no consumir lácteos y derivados y entre 65 y 69% refirieron no consumir verduras. Conclusiones: Observamos un elevado porcentaje de obesidad y sobrepeso, un bajo consumo de lácteos y verduras y un alto consumo de azúcares, relacionados posiblemente a cambios en los aspectos alimentarios y sus costumbres, influenciados por la cercanía a las zonas urbanas y el acceso a alimentos de menor precio y mayor contenido energético.

Aspectos epidemiológicos, clínicos y bioquímicos en pacientes con hepatitis crónica del Hospital Pablo Tobón Uribe (HPTU entre 1991-2001

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Gonzálo Correa Arango

2001-04-01

Full Text Available

La hepatitis crónica representa una serie de desórdenes hepáticos
de variada etiología y severidad, caracterizados por inflamación
hepática con o sin necrosis, de al menos seis meses de evolución (1-3.
Nuestro objetivo es caracterizar las hepatitis crónicas diagnosticadas histológicamente en el HPTU en los últimos 10 años utilizando las historias clínicas de estos pacientes, en su aspecto epidemiológico, clínico y bioquímico, con el fin de impactar en aspectos como el tratamiento, las medidas de prevención y el enfoque diagnóstico.

Chemical composition analysis of simulated waste glass T10-G-16A

Energy Technology Data Exchange (ETDEWEB)

Fox, K. M. [Savannah River Site (SRS), Aiken, SC (United States). Savannah River National Lab. (SRNL)

2015-08-01

In this report, SRNL provides chemical composition analyses of a simulated LAW glass designated T10-G-16A.The measured chemical composition data are reported and compared with the targeted values for each component. No issues were identified in reviewing the analytical data.

Entropy Generation in a Chemical Reaction

Science.gov (United States)

Miranda, E. N.

2010-01-01

Entropy generation in a chemical reaction is analysed without using the general formalism of non-equilibrium thermodynamics at a level adequate for advanced undergraduates. In a first approach to the problem, the phenomenological kinetic equation of an elementary first-order reaction is used to show that entropy production is always positive. A…

Aspectos psicosociales en torno a las personas afectadas por el virus de la inmunodeficiencia humana (VIH) en Costa Rica

OpenAIRE

Mata, Leonardo

1989-01-01

Artículo científico -- Universidad de Costa Rica. Instituto de Investigaciones en Salud, 1989 Este trabajo describe aspectos psicosociales que resaltan de la interacción entre los proveedores de atencion en salud (el personal de salud) y las personas afectadas por el virus de la inmunodeficiencia human (HIV). La discusión se basa en las experiencias del autor obtenidas mediante el seguimiento de una falange de casi 1000 hombres homosexuales o bisexuales en Costa Rica, así como de la intera...

TRANSPORTE PÚBLICO DO MUNICÍPIO DE NATAL: aspectos de parafiscalidade do caso SETURN

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Manoel Damião Machado da Silva

2015-12-01

Full Text Available A proposta deste trabalho é compreender como os aspectos da gestão parafiscal do Sindicato das Empresas de Transporte Urbano de Passageiros do Município do Natal – SETURN contribuem para a eficiência do transporte público e para a melhoria a mobilidade urbana, visando contribuir na qualidade de vida da população local. A pesquisa foi desenvolvida no Sindicato, baseada no estudo de caso, por meio de entrevista semiestruturada, onde foram feitas análises, com o objetivo de descrever a situação do transporte coletivo relativo à eficiência que, na visão da pesquisa, fica comprometida, uma vez que os automóveis particulares disputam o mesmo espaço nas vias, juntamente com os transportes coletivos, impedindo assim, agilidade nas viagens.

USO DE ANIMALES DE LABORATORIO EN COLOMBIA: REFLEXIONES SOBRE ASPECTOS NORMATIVOS Y ÉTICOS

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L. Botero

2013-01-01

Full Text Available El uso de modelos animales para la experimentación se ha incrementado considerablemente en Colombia. Mientras en países desarrollados estos animales se producen en ambientes controlados bajo normas estrictas que garantizan la validez de los resultados de investigación, en Colombia la normatividad al respecto es precaria e imprecisa lo que ha llevado a que pocas instituciones mantengan los animales con los estándares requeridos para obtener resultados de investigación con el rigor que la comunidad científica internacional exige. En este artículo presentamos una breve revisión de la normatividad en el tema a nivel mundial y, finalmente, se mencionan algunas recomendaciones sobre ajgunos aspectos que debería integrar la normatividad colombiana para que se adecúe a las regulaciones internacionales.

Aspectos psicológicos de los enfermos con dermatitis atópica: una revisión

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SUSANA ANTUÑA BERNARDO

2002-01-01

Full Text Available En el presente artículo se realiza una revisión de las investigaciones publicadas sobre las características psicológicas de los enfermos con dermatitis atópica. Esta revisión permite constatar la ausencia de investigación básica sobre este tema. Las investigaciones han girado fundamentalmente en torno a las siguientes características psicosociales de estos enfermos: personalidad, ansiedad y depresión, relaciones materno-filiales, estrés y calidad de vida. Las impresiones clínicas parecen conceder un papel importante a los aspectos psicológicos en el desarrollo de este trastorno, pero las conclusiones de la literatura son poco consistentes.

Coccidiosis hepática en el conejo: aspectos ambientales y clínico-patológicos

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Mario Pérez Martínez

2011-01-01

Full Text Available La cunicultura es una industria creciente en México. De las 13 especies de coccidias que afectan a los conejos, la Eimeria stiedae es el principal agente causal de la coccidiosis hepática en el conejo. En la presente revisión se aborda la importancia del medio ambiente y aspectos clínico- patológicos de la coccidiosis hepática en conejos. Como resultado de la revisión de la literatura disponible se observa la necesidad de abordar el estudio de la coccidiosis hepática del conejo de manera integral, y avanzar en la comprensión de los mecanismos celulares y moleculares involucrados en su patogenia.

Dor neuropática central após lesão medular traumática: capacidade funcional e aspectos sociais Dolor neuropático central después de lesión medular traumática: capacidad funcional y aspectos sociales Central neuropathic pain after traumatic spinal cord injury: functional capacity and social aspects

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Janaina Vall

2005-12-01

Full Text Available Estudo de caso comparativo com o objetivo de avaliar a capacidade funcional e os aspectos sociais de dois pacientes, ambos com lesão medular traumática, sem e com dor neuropática central associada, respectivamente. Para avaliar a capacidade funcional, foi utilizado como instrumento o Functional Independence Measure ou Escala de Independência Funcional. E para avaliar os aspectos sociais foi construído o ecomapa de cada paciente, preconizado pelo modelo Calgary de avaliação de famílias. Ambos foram aplicados no domicílio do paciente. Os resultados mostraram que o paciente com dor neuropática central secundária à lesão medular possui baixa capacidade funcional e precária rede social de apoio, quando comparado com o paciente com as mesmas condições, porém sem dor associada.Estudio de caso comparativo con el objetivo de evaluar la capacidad funcional y los aspectos sociales de dos paciente, ambos con lesión medular traumática, sin y con el dolor neuropático central, respectivamente. Para evaluar la capacidad funcional, se usó como instrumento la Escala de Independencia Funcional. Y para evaluar los aspectos sociales, el ecomapa de cada paciente fue construido, preconizado por el modelo Calgary de evaluación de familias. Los dos furon aplicados en la casa del paciente. Los resultados mostraron que el paciente con dolor neuropatico central secundario a la lesión medular posee capacidad funcional baja y precaria red social de apoyo, cuando comparado con el paciente con las mismas condiciones, pero sin el dolor asociado.Comparative study of case with the aim of evaluating the functional capacity and social aspects of two patients, both with traumatic spinal cord injury, without and with central neuropathic pain associated, respectively. To evaluate the functional capacity it was used as instrument Functional Independence Measure. And to evaluate the social aspects the ecomap of each patient one it was built, extolled by the model

Aspectos socioeconómicos de la evaluación de impacto ambiental

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Echavarren, José Manuel

2007-08-01

Full Text Available This article reviews the methodology and background of the socioeconomic dimension in environment impact evaluations. This text examines the pertinence of Social Sciences in the study of environmental assessment. Likewise, the article deals with the main techniques applied to this field. Special attention is drawn to the concept and research of landscape as a social factor of environment as well as to public participation in the processes of Environmental Impact Assessment research.

El presente artículo revisa la metodología y el fundamento del estudio de los aspectos socioeconómicos de las Evaluaciones de Impacto Ambiental. Se examina la pertinencia de las Ciencias Sociales dentro de los estudios de impacto ambiental, así como las técnicas principales que se aplican en la práctica investigadora al respecto. Se presta atención especial al concepto y al estudio del paisaje como elemento social del medio ambiente, así como a los mecanismos de participación dentro de las dinámicas de las Evaluaciones de Impacto Ambiental.

Aspectos embriológicos y morfológicos del páncreas

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María Arenas

2013-12-01

Full Text Available La diabetes se caracteriza por niveles altos de glucosa en sangre. Puede ser causada por muy poca producción de insulina, la hormona producida por el páncreas para regular el azúcar sanguíneo, por resistencia a esta hormona o ambas. Para comenzar a estudiar esta patología que afecta a 194 millones de personas en el mundo, de acuerdo a lo estimado por la federación internacional de diabetes, se hace necesario estudiar los aspectos morfológicos y embriológicos del páncreas. El páncreas es una glándula mixta tanto exocrina como endocrina. El «jugo pancreático», que corresponde a la secreción exocrina es vertido en el duodeno a través de los conductos pancreático principal de Wirsung y pancreático accesorio de Santorini. La secreción pancreática endocrina, la insulina, es vertida hacia la sangre y tiene una acción esencial en el metabolismo de los glúcidos.

ASPECTOS CELULARES Y MOLECULARES INVOLUCRADOS EN LA EVOLUCIÓN DE ESTRUCTURAS CRANEOFACIALES

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Belfran Alcides Carbonell medina

2012-01-01

Full Text Available La cabeza de los vertebrados ha sido considerada como una de las principales innovaciones en el proceso evolutivo de los vertebrados y de su distinción craneofacial con el resto de cordados no vertebrados. Muchas estructuras craneofaciales como dientes (pulpa y dentina, maxilares, cartílagos, esqueleto craneofacial y órganos sensoriales son derivadas de las células de la cresta neural (CCN; estas células aportaron en gran medida el patronamiento para la evolución y el desarrollo del complejo craneofacial. La evolución de estas estructuras se llevo a cabo principalmente por la evolución misma de las células de la cresta neural y la duplicación de varios genes involucrados en la delaminación y migración de este grupo de células. La siguiente revisión fue realizada con el objetivo de profundizar en los diferentes aspectos celulares y moleculares involucrados en la evolución de las estructuras craneofaciales.

Aspectos éticos en Pediatría, las inmunodeficiencias primarias Ethical aspects in Pediatrics, the primary immunodeficiencies

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Martha Leonor Paradoa Pérez

2012-12-01

Full Text Available Las inmunodeficiencias primarias son enfermedades genéticas, caracterizadas por infecciones crónicas devastadoras que conllevan a la muerte, al desarrollo de tumores y a enfermedades autoinmunes, y la mayoría de estas enfermedades cursan en la edad pediátrica. Desde la última década del pasado siglo, el desarrollo de la tecnología, el surgimiento del Proyecto del Genoma Humano y la profundización en los aspectos bioéticos, han dado lugar a especificidades en la atención médica e investigativa del paciente pediátrico y del que desarrolla una enfermedad inmunológica. Este trabajo recoge los aspectos bioéticos más importantes y los dilemas éticos con los que se enfrenta el inmunólogo pediátrico en la atención al paciente con inmunodeficiencia primaria, el cual demanda la atención de, prácticamente, todas las especialidades pediátricas.Primary immunodeficiencies are genetic diseases characterized by devastating chronic infections leading to death, tumor development and autoimmune diseases, and most of diseases occur at pediatric ages. Since the last decade of the past century, the development of technology, the emergence of the Human Genome Project and the in-depth consideration of bioethical aspects have given rise to specificities in the medical and research care for the pediatric patients and for those suffering immunological diseases. This paper covered the most important bioethical aspects and the ethical dilemmas that the pediatric immunologist faces when taking care of a primary immunodeficiency patient, who practically requires the attention of all the pediatric specialties.

Aspectos clínicos de la Blastomicosis sudamericana (Paracoccidioidomicosis en el Perú

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Zuño Burstein Alva

2002-01-01

Full Text Available En esta revisión se presentan las características más notorias del cuadro clínico de la Blastomicosis Sudamericana en el Perú, tomando como fuente informativa nuestro trabajo del año 1971 (VII Congreso Ibero Latinoamericano de Dermatología, realizado en Caracas, Venezuela que presentó la mayor casuística publicada hasta la actualidad en nuestro medio totalizando 111 casos al recopilar la información de Pesce H., desde el año 1937 hasta 1965, con 71 casos, y la nuestra con 40 casos nuevos del Servicio Académico Asistencial de Dermatología de la Universidad Nacional Mayor de San Marcos en el Hospital Dos de Mayo de Lima, estudiados hasta el año 1971. Con esta casuística se analizan la distribución geográfica, edad, sexo, ocupación, evolución clínica, aspectos y formas clínicas de esta enfermedad.

Aspectos nutricionais e ambientais da obesidade canina

Directory of Open Access Journals (Sweden)

Karina Preising Aptekmann

2014-11-01

Full Text Available A obesidade é a doença nutricional mais frequente em cães, leva a uma série de alterações nas funções corporais e limita a longevidade dos animais. Vários fatores contribuem para o desenvolvimento da obesidade em cães, como genética, raça, idade, falta de atividade física, composição calórica dos alimentos, tipo e a forma de alimentação, distúrbios hormonais, medicamentos e fatores relacionados com os proprietários. Devido à falta de estudos sobre os aspectos nutricionais e ambientais envolvidos no desenvolvimento da obesidade canina, o presente trabalho objetivou obter estas informações por meio de enquetes a proprietários. Foram realizadas 254 entrevistas com proprietários de cães com sobrepeso ou obesos, atendidos em Hospitais Veterinários Universitários. Selecionaram-se cães com escore de condição corporal (ECC de 6 a 9, de acordo com escala descrita por LAFLAMME (1997. A maioria dos cães acometidos eram fêmeas adultas castradas, sem raça definida (33% ou Poodles (17%. De acordo com 36% dos respondentes, o excesso de alimento era a possível razão do ganho de peso dos animais. Apenas 52% dos proprietários tentaram realizar controle de peso do seu animal, principalmente reduzindo a quantidade de alimento. Não houve correlação entre a condição corporal do proprietário, nível de escolaridade, renda familiar e ambiente domiciliar dos proprietários com o ECC dos animais. As informações obtidas podem auxiliar na identificação dos fatores nutricionais e ambientais envolvidos no desenvolvimento da obesidade em cães, podendo adotar medidas preventivas e desenvolver melhores estratégias para o tratamento

A perspectiva cognitivo-comportamental dos aspectos psicossociais que interferem na qualidade da relação médico-paciente

Directory of Open Access Journals (Sweden)

Janaína Bianca Barletta

2011-12-01

Full Text Available Este artigo tem por objetivo abordar os aspectos psicossociais que mediam a qualidade da relação médico-paciente com base em uma concepção cognitivo-comportamental. Para tanto, é feita uma breve revisão sobre os aspectos da relação de ajuda. Ressalta-se a importância da qualidade da relação estabelecida, destacando a participação de ambos na tomada de decisão e a relação colaborativa, empática e bidirecional. Assim, as crenças, necessidades específicas e características pessoais ganham lugar de destaque. Além disso, a organização empregadora, a equipe de saúde, o meio social e os familiares vão interferir na dinâmica da relação. O suporte social e a comunicação terapêutica são outros componentes da multifatorialidade desse processo. A relação positiva permite o aparecimento de fatores de predisposição da doença, facilita o treino de habilidades assertivas de enfrentamento, a reestruturação cognitiva e a reeducação emocional, resultando na construção de respostas adaptativas a situações adversas.

Chemical and mineralogical characterization and ceramic suitability ...

African Journals Online (AJOL)

The chemical and mineralogical characterization of raw feldspathic materials from Dschang (Cameroon) was realized by means of X-ray diffraction, differential thermal analyses, optical and scanning electron microscopies, and analytical techniques. It was found that these materials consist of albite (43 ± 3 wt.%), microcline ...

IKEA and the Responsible Governance of Supply Chains : IKEA’s work on chemicals in textiles

OpenAIRE

Boström, Magnus; Gilek, Michael; Jönsson, Anna Maria; Karlsson, Mikael

2013-01-01

This report focuses on IKEA’s management and communication surrounding sustainability in general and chemical risks specifically. IKEA’s work is analysed in relation to theoretical concepts around responsibility, supply chain, and governance . The report focuses on IKEA’s visions and organizational structures, its policy instruments to deal with chemical risks, supplier-relations and communication and learning. The study is based on previous scholarly literature, analyses of relevant document...

Design de joias a partir de aspectos plásticos da dança conteporânea

OpenAIRE

Eliana Paula Calegari; Carlos Gustavo Hoelzel

2011-01-01

Este estudo consiste em mostrar de maneira objetiva e clara as etapas de desenvolvimento do projeto de uma coleção de joias a partir de aspectos plásticos da dança contemporânea. Para alcançar esse objetivo, foram realizadas pesquisas em torno do design de joias e a dança contemporânea, sendo utilizada como referência no processo criativo durante a projetação das peças. Desenvolveram-se alternativas de solução através de desenhos e traços de composição de referenciais plásticos da dança onde ...

ASPECTOS HISTÓRICOS DO TRABALHO PEDAGÓGICO DOS PRIMEIROS JARDINS DE INFÂNCIA NO ESTADO DO PARANÁ

OpenAIRE

Paschoal, Jaqueline Delgado; Machado, Maria Cristina Gomes

2015-01-01

O objetivo deste estudo foi conhecer, registrar e analisar a criação e organização do trabalho pedagógico dos primeiros Jardins de Infância paranaenses. A metodologia utilizada pautou-se no Método Histórico pois, por meio desse foi possível compreender os aspectos sociais, econômicos e políticos que atravessava o Brasil e o Estado do Paraná naquele momento histórico. Os resultados da pesquisa apontam que embora esse estado seja pioneiro na criação do primeiro Jardim de Infância, não oficial, ...

Toxic chemical risk acceptance criteria

International Nuclear Information System (INIS)

Craig, D.K.; Davis, J.; Lee, L.; Lein, P.; Omberg, S.

1992-01-01

This paper presents recommendations of a subcommittee of the Westinghouse M ampersand 0 Nuclear Facility Safety Committee concerning toxic chemical risk acceptance criteria. Two sets of criteria have been developed, one for use in the hazard classification of facilities, and the second for use in comparing risks in DOE non-reactor nuclear facility Safety Analysis Reports. The Emergency Response Planning Guideline (ERPG) values are intended to provide estimates of concentration ranges for specific chemicals above which exposure would be expected to lead to adverse heath effects of increasing severity for ERPG-1, -2, and -3s. The subcommittee recommends that criteria for hazard class or risk range be based on ERPGs for all chemicals. Probability-based Incremental Cancer Risk (ICR) criteria are recommended for additional analyses of risks from all known or suspected human carcinogens. Criteria are given for both on-site and off-site exposure. The subcommittee also recommends that the 5-minute peak concentration be compared with the relevant criterion with no adjustment for exposure time. Since ERPGs are available for only a limited number of chemicals, the subcommittee has developed a proposed hierarchy of concentration limit parameters for the different criteria

Sorne aspects of Fusarium genus and the Fusarium oxysporum species Algunos aspectos de los hongos del genero Fusarium y de la especie Fusarium oxysporum

Directory of Open Access Journals (Sweden)

Arbeláez Torres Germán

2000-12-01

Full Text Available Since the proposal of the utilization of the fungus Fusarium oxysporum for biological control of coca plants in Colombia, there is a serious discussion on different Colombian meetings about the advantages and disadvantages of its application. However in these discussions there was not enough knowledge of the fungus Fusarium oxysporum. This paper presents sorne biological and pathological aspects ofthe genus Fusarium and the species Fusarium oxysporum.Ante la propuesta de utilizar el hongo Fusarium oxysporum
f.sp. erythoxyli para el control biológico de las plantas de
coca en Colombia, se ha abierto una amplia discusión en distintos ámbitos nacionales sobre las bondades y los aspectos
negativos de su aplicación. Sin embargo, en dicha discusión
se ha notado un gran desconocimiento sobre el hongo
Fusarium oxysporum. En este artículo se presentan diversos
aspectos biológicos y patológicos del género Fusarium y de
la especie Fusarium oxysporum.

Towards interoperable and reproducible QSAR analyses: Exchange of datasets.

Science.gov (United States)

Spjuth, Ola; Willighagen, Egon L; Guha, Rajarshi; Eklund, Martin; Wikberg, Jarl Es

2010-06-30

QSAR is a widely used method to relate chemical structures to responses or properties based on experimental observations. Much effort has been made to evaluate and validate the statistical modeling in QSAR, but these analyses treat the dataset as fixed. An overlooked but highly important issue is the validation of the setup of the dataset, which comprises addition of chemical structures as well as selection of descriptors and software implementations prior to calculations. This process is hampered by the lack of standards and exchange formats in the field, making it virtually impossible to reproduce and validate analyses and drastically constrain collaborations and re-use of data. We present a step towards standardizing QSAR analyses by defining interoperable and reproducible QSAR datasets, consisting of an open XML format (QSAR-ML) which builds on an open and extensible descriptor ontology. The ontology provides an extensible way of uniquely defining descriptors for use in QSAR experiments, and the exchange format supports multiple versioned implementations of these descriptors. Hence, a dataset described by QSAR-ML makes its setup completely reproducible. We also provide a reference implementation as a set of plugins for Bioclipse which simplifies setup of QSAR datasets, and allows for exporting in QSAR-ML as well as old-fashioned CSV formats. The implementation facilitates addition of new descriptor implementations from locally installed software and remote Web services; the latter is demonstrated with REST and XMPP Web services. Standardized QSAR datasets open up new ways to store, query, and exchange data for subsequent analyses. QSAR-ML supports completely reproducible creation of datasets, solving the problems of defining which software components were used and their versions, and the descriptor ontology eliminates confusions regarding descriptors by defining them crisply. This makes is easy to join, extend, combine datasets and hence work collectively, but

Towards interoperable and reproducible QSAR analyses: Exchange of datasets

Directory of Open Access Journals (Sweden)

Spjuth Ola

2010-06-01

Full Text Available Abstract Background QSAR is a widely used method to relate chemical structures to responses or properties based on experimental observations. Much effort has been made to evaluate and validate the statistical modeling in QSAR, but these analyses treat the dataset as fixed. An overlooked but highly important issue is the validation of the setup of the dataset, which comprises addition of chemical structures as well as selection of descriptors and software implementations prior to calculations. This process is hampered by the lack of standards and exchange formats in the field, making it virtually impossible to reproduce and validate analyses and drastically constrain collaborations and re-use of data. Results We present a step towards standardizing QSAR analyses by defining interoperable and reproducible QSAR datasets, consisting of an open XML format (QSAR-ML which builds on an open and extensible descriptor ontology. The ontology provides an extensible way of uniquely defining descriptors for use in QSAR experiments, and the exchange format supports multiple versioned implementations of these descriptors. Hence, a dataset described by QSAR-ML makes its setup completely reproducible. We also provide a reference implementation as a set of plugins for Bioclipse which simplifies setup of QSAR datasets, and allows for exporting in QSAR-ML as well as old-fashioned CSV formats. The implementation facilitates addition of new descriptor implementations from locally installed software and remote Web services; the latter is demonstrated with REST and XMPP Web services. Conclusions Standardized QSAR datasets open up new ways to store, query, and exchange data for subsequent analyses. QSAR-ML supports completely reproducible creation of datasets, solving the problems of defining which software components were used and their versions, and the descriptor ontology eliminates confusions regarding descriptors by defining them crisply. This makes is easy to join

Qualidade de vida e saúde bucal em crianças e adolescentes: aspectos conceituais e metodológicos

OpenAIRE

Barbosa,Taís de Souza; Mialhe,Fábio Luiz; Castilho,Aline Rogéria Freire de; Gavião,Maria Beatriz Duarte

2010-01-01

O interesse pela qualidade de vida e saúde bucal em crianças e adolescentes vem aumentando, já que as desordens orais provavelmente apresentam efeito negativo na qualidade de vida das mesmas. Neste sentido, questionários que visam a avaliar o impacto da saúde bucal no bem-estar têm sido desenvolvidos e adaptados para este grupo específico. O objetivo deste trabalho é descrever a relação entre qualidade de vida e saúde bucal em crianças e adolescentes, focalizando aspectos conceituais e metodo...

Aspectos beneficiosos del zinc en la salud ocular. Intervención en el tratamiento de patologías oculares

OpenAIRE

Martínez Ortega, Patricia Nerea

2016-01-01

En el presente trabajo de investigación se lleva a cabo una revisión bibliográfica del efecto del zinc en la salud ocular, realizándose una evaluación de sus aspectos metabólicos en el organismo y valorando los efectos beneficiosos y los posibles efectos tóxicos de una suplementación con altas dosis de este elemento. Los efectos del zinc en el ser humano son principalmente beneficiosos ya que se trata de un oligoelemento esencial para el mismo y cuya deficiencia ocasiona severos problemas ...

Aspectos nutricionales del búfalo

Directory of Open Access Journals (Sweden)

André Mendes Jorge

2011-11-01

necesario para mantener al animal en un estado saludable donde puedan expresar su potencial reproductivo de acuerdo con el nivel de producción deseado en condiciones específicas de ambientales y de alimentación (Paul & Lal, 2010. El presente texto fue escrito con la intención de abordar algunos aspectos nutricionales del búfalo, exponiendo lo más actual sobre el tema y de esa forma aclarar las posibles dudas sobre las normas de alimentación para esta especie.

Chemical and ecotoxicological analyses of sediments and elutriates of contaminated rivers due to e-waste recycling activities using a diverse battery of bioassays

Energy Technology Data Exchange (ETDEWEB)

Wang, F.; Leung, A.O.W.; Wu, S.C.; Yang, M.S. [Croucher Institute for Environmental Sciences, and Department of Biology, Hong Kong Baptist University, Kowloon Tong (Hong Kong); Wong, M.H., E-mail: mhwong@hkbu.edu.h [Croucher Institute for Environmental Sciences, and Department of Biology, Hong Kong Baptist University, Kowloon Tong (Hong Kong)

2009-07-15

A multi-trophic, multi-exposure phase assessment approach was applied to characterize the toxicity of sediments collected from two rivers in Guiyu, China, an e-waste recycling centre. Elutriate toxicity tests (bacterium Vibrio fischeri and microalga Selenastrum capricornutum) and whole sediment toxicity test (crustacean Heterocypris incongruens) showed that most sediments exhibited acute toxicity, due to elevated heavy metals and PAHs levels, and low pH caused by uncontrolled acid discharge. The survival rates of crustaceans were negatively (p < 0.05) correlated with total PAHs in sediments (411-1755 mg kg{sup -1}); EC50s of V. fischeri on the elutriates were significantly correlated with elutriate pH (p < 0.01). Significant (p < 0.05) correlations between the induction of hepatic metallothionein in tilapia (Oreochromis mossambicus) and metal concentrations (Cu, Zn, Pb) in sediments were also observed, when fish were fed with diets containing sediment. The results showed that uncontrolled e-waste recycling activities may bring adverse effects to local aquatic ecosystem. - Toxicity tests using different trophic organisms provided important information, supplementing chemical analyses.

Aspectos relevantes na definção estrategica para prestação de serviços virtuais em empresas de contabilidade: um estudo de caso

Directory of Open Access Journals (Sweden)

Fabiano Maury Raupp

2004-03-01

Full Text Available O objetivo deste artigo consiste em verificar aspectos a serem considerados na definição estratégica para prestação de serviços virtuais em uma empresa de contabilidade. No Brasil há poucos estudos publicados sobre o uso dos serviços virtuais em empresas contábeis e os resultados alcançados. Assim, por meio de um estudo de caso, em uma empresa de contabilidade que está em fase de implantação de um sistema de serviços virtuais, fez-se uma descrição das etapas de sua implantação. Em seguida, procedeu-se uma análise dos seus aspectos facilitadores e dificultadores. Por fim, foram considerados os fatores observados por esta empresa na definição estratégica, visando alcançar o sucesso desejado com esta nova modalidade de prestação de serviços contábeis.

Chemical and microstructural analyses for heavy metals removal from water media by ceramic membrane filtration.

Science.gov (United States)

Ali, Asmaa; Ahmed, Abdelkader; Gad, Ali

2017-01-01

This study aims to investigate the ability of low cost ceramic membrane filtration in removing three common heavy metals namely; Pb 2+ , Cu 2+ , and Cd 2+ from water media. The work includes manufacturing ceramic membranes with dimensions of 15 by 15 cm and 2 cm thickness. The membranes were made from low cost materials of local clay mixed with different sawdust percentages of 0.5%, 2.0%, and 5.0%. The used clay was characterized by X-ray diffraction (XRD) and X-ray fluorescence analysis. Aqueous solutions of heavy metals were prepared in the laboratory and filtered through the ceramic membranes. The influence of the main parameters such as pH, initial driving pressure head, and concentration of heavy metals on their removal efficiency by ceramic membranes was investigated. Water samples were collected before and after the filtration process and their heavy metal concentrations were determined by chemical analysis. Moreover, a microstructural analysis using scanning electronic microscope (SEM) was performed on ceramic membranes before and after the filtration process. The chemical analysis results showed high removal efficiency up to 99% for the concerned heavy metals. SEM images approved these results by showing adsorbed metal ions on sides of the internal pores of the ceramic membranes.

Aspectos técnicos da psicoterapia de grupo

Directory of Open Access Journals (Sweden)

Bernardo Blay Neto

1959-09-01

Full Text Available São estudados os mecanismos psíquicos que se desenvolvem em agrupamentos humanos e a sua utilização para fins terapêuticos, sendo focalizado o fenômeno da interação como o dinamismo básico dessas reações. O autor compara a forma pela qual encara o grupo com as idéias de Bion, Moreno e Sullivan, encarando a hipótese de que os sentimentos de amor e hostilidade se manifestem em função do bom ou do mau funcionamento dos contactos primários que caracterizam a dependência. O autor comenta resultados que obteve usando o psicodrama, mediante o qual estudou reações emocionais de inveja, ódio, agressividade e amor. O autor analisa as técnicas de Slavson e Pratt baseando-se nos dinamismos inerentes ao grupo e refere os estudos de Beukemkamp para a compreensão do fenômeno transferenciai que, no grupo, tem características próprias. As diferenças entre a terapia de grupo e a individual são apontadas, sendo a contra-transferência considerada como elemento construtivo. Pensa o autor que o aspecto dramático vivenciado pelo grupo ou por um dos seus componentes tem alto valor, pois engloba a verbalização, os componentes emocionais e os componentes posturais. O tono emocional vivenciado pelo grupo é mais intenso e opressivo que o que é despertado na terapêutica individual, o que é explicável pela somação de efeitos provocada pela reação circular. Segundo o autor, a Psicoterapia de Grupo e a Psicoterapia Individual não se opõem, mas se completam.

Sensitivity and uncertainty analyses for performance assessment modeling

International Nuclear Information System (INIS)

Doctor, P.G.

1988-08-01

Sensitivity and uncertainty analyses methods for computer models are being applied in performance assessment modeling in the geologic high level radioactive waste repository program. The models used in performance assessment tend to be complex physical/chemical models with large numbers of input variables. There are two basic approaches to sensitivity and uncertainty analyses: deterministic and statistical. The deterministic approach to sensitivity analysis involves numerical calculation or employs the adjoint form of a partial differential equation to compute partial derivatives; the uncertainty analysis is based on Taylor series expansions of the input variables propagated through the model to compute means and variances of the output variable. The statistical approach to sensitivity analysis involves a response surface approximation to the model with the sensitivity coefficients calculated from the response surface parameters; the uncertainty analysis is based on simulation. The methods each have strengths and weaknesses. 44 refs

The Chemical Weapons Convention and the Role of Engineers and Scientists

Directory of Open Access Journals (Sweden)

Matoušek, J

2010-02-01

Full Text Available Chemical weapons, like all military technology, are associated with activities of scientists and engineers. However, chemical weapons differ from any other military technology because they were invented, and their first mass use directly developed by famous chemists. The active contribution of engineers and scientists and their organisations in the negotiations on chemical disarmament, including drafting the Chemical Weapons Convention, is described. Their present and future role in implementing the Convention is analysed, taking into consideration the threats and benefits of advances in science and technology, and stressing the independent expertise of the OPCW Scientific Advisory Board.

Chemical data and statistical analyses from a uranium hydrogeochemical survey of the Rio Ojo Caliente drainage basin, New Mexico. Part I. Water

International Nuclear Information System (INIS)

Wenrich-Verbeek, K.J.; Suits, V.J.

1979-01-01

This report presents the chemical analyses and statistical evaluation of 62 water samples collected in the north-central part of New Mexico near Rio Ojo Caliente. Both spring and surface-water samples were taken throughout the Rio Ojo Caliente drainage basin above and a few miles below the town of La Madera. A high U concentration (15 μg/l) found in the water of the Rio Ojo Caliente near La Madera, Rio Arriba County, New Mexico, during a regional sampling-technique study in August 1975 by the senior author, was investigated further in May 1976 to determine whether stream waters could be effectively used to trace the source of a U anomaly. A detailed study of the tributaries to the Rio Ojo Caliente, involving 29 samples, was conducted during a moderate discharge period, May 1976, so that small tributaries would contain water. This study isolated Canada de la Cueva as the tributary contributing the anomalous U, so that in May 1977, an extremely low discharge period due to the 1977 drought, an additional 33 samples were taken to further define the anomalous area. 6 references, 3 figures, 6 tables

Aspectos psicossociais da imigração familiar na grande Porto Alegre Psychosocial aspects of familiar immigration at the Porto Alegre region (Brazil

Directory of Open Access Journals (Sweden)

Jorge Castellá Sarriera

2005-04-01

Full Text Available Neste artigo apresentam-se alguns aspectos psicossociais presentes no processo migratório de seis famílias hispano-americanas na região metropolitana de Porto Alegre. Estes aspectos, relatados através de entrevistas semi-estruturadas com os integrantes das famílias, indicam os principais tópicos que nortearam as entrevistas: suas trajetórias migracionais, decisão de imigrar, sua inserção na cultura local, suas relações comunitárias, identidade e expectativas de vida. São analisadas as formas como ocorrem as transições aculturativas no contexto local.On this article some psychosocial aspects included on the migratory process of six Hispanic families at the metropolitan region of Porto Alegre (Brazil are presented. These aspects, obtained through semi-structured interviews with the members of the families that had indicated the principal topics that guided the interviews: their emigrational paths, their decision to immigrate, their insertion on the local culture, their community relations, identity and life expectations. The ways by which the acculturative transitions on the local context happen are analyzed.

Weld region corrosion during chemical cleaning of PWR [pressurized-water reactor] steam generators: Volume 2, Tests and analyses: Final report

International Nuclear Information System (INIS)

Barna, J.L.; Bozeka, S.A.; Jevec, J.M.

1987-07-01

The potential for preferential corrosion of steam generator weld regions during chemical cleaning using the generic SGOG solvents was investigated. The investigations included development and use of a corrosion assessment test facility which measured corrosion currents in a realistic model of the steam generator geometry in the vicinity of a specific weld during a simulated chemical dissolution of sludge consisting of essentially pure magnetite. A corrosion monitoring technique was developed and qualified. In this technique free corrosion rates measured by linear polarization techniques are added to corrosion rates calculated from galvanic current measured using a zero resistance ammeter to give an estimate of total corrosion rate for a galvanically corroding material. An analytic modeling technique was developed and proved useful in determining the size requirements for the weld region mockup used in the corrosion assessment test facility. The technique predicted galvanic corrosion rates consistent with that observed in a corrosion assessement test when polarization data used as model input were obtained on-line during the test. The test results obtained during this investigation indicated that chemical cleaning using the SGOG magnetite dissolution solvent can be performed with a small amount of corrosion of secondary side internals and pressure boundary welds. The maximum weld region corrosion measured during a typical chemical cleaning cycle to remove essentially pure magnetite sludge was about 8 mils. However, additional site specific weld region corrosion assessment testing and qualification will be required prior to chemical cleaning steam generators at a specific plant. Recommendations for site specific qualification of chemical cleaning processes and for use of process monitors and on-line corrosion instrumentation are included in this report

Phenomenological description of selected elementary chemical reaction mechanisms: An information-theoretic study

International Nuclear Information System (INIS)

Esquivel, R.O.; Flores-Gallegos, N.; Iuga, C.; Carrera, E.M.; Angulo, J.C.; Antolin, J.

2010-01-01

The information-theoretic description of the course of two elementary chemical reactions allows a phenomenological description of the chemical course of the hydrogenic abstraction and the S N 2 identity reactions by use of Shannon entropic measures in position and momentum spaces. The analyses reveal their synchronous/asynchronous mechanistic behavior.

Aspectos relacionados à ocorrência e mecanismo de ação de fumonisinas

Directory of Open Access Journals (Sweden)

Pozzi Claudia Rodrigues

2002-01-01

Full Text Available As fumonisinas são micotoxinas produzidas por fungos do gênero Fusarium, um dos principais fitopatógenos de grãos de milho. Isoladas em 1988, a partir de amostras de milho mofado proveniente de região com alta incidência de câncer do esôfago na África, foram relacionadas à ocorrência de leucoencefalomalácia eqüina e hidrotórax e edema pulmonar suíno, e outras patologias animais. A presente revisão aborda aspectos da ocorrência natural das fumonisinas em grãos de milho, características físico-química das moléculas e efeitos toxicológicos em eqüinos, suínos, aves e bovinos, além do provável mecanismo de ação das micotoxinas.

Industrial emerging chemicals in the environment

Directory of Open Access Journals (Sweden)

Vojinović-Miloradov Mirjana B.

2014-01-01

Full Text Available In the recent time, considerable interest has grown concerning the presence of the emerging industrial chemicals, EmIC. They are contaminants that have possible pathway to enter to the environment and they are dominantly released by industrial and anthropogenic activities. EmIC are applied in different fields using as industrial chemicals (new and recently recognized, global organic contaminants (flame retardant chemicals, pharmaceuticals (for both human and animal uses, endocrine-modulating compounds, biological metabolites, personal care products, household chemicals, nanomaterial (energy storage products, lubricants, anticorrosive and agriculture chemicals and others that are applied to a wide variety of everyday items such as clothing, upholstery, electronics and automobile interiors. NORMAN (Network of reference laboratories for monitoring of emerging environmental pollutants has established an open, dynamic, list of emerging substances and pollutants. EmIC have been recently detected in the environment due to their long-term presence, pseudo-persistence and increased use. Improvements in sophisticated analytical methods and time integrative passive sampling have enabled the identification and quantification of EmIC, in very low concentrations (ppb, ppt and lower, which likely have been present in all environmental mediums for decades. Passive technology is an innovative technique for the time-integrated measurement of emerging contaminants in water, sediment, soil and air. Passive samplers are simple handling cost-effective tool that could be used in environmental monitoring programmes. These devices are now being considered as a part of an emerging strategy for monitoring a range of emerging industrial chemicals and priority pollutants in the aquatic environment. EmIC are substances that are not included in the routine monitoring programmes and whose fate, behaviour and (ecotoxicological effects are still not well understood. Emerging

Chemical composition of lunar material.

Science.gov (United States)

Maxwell, J A; Abbey, S; Champ, W H

1970-01-30

Chemical and emission spectrographic analyses of three Apollo 11 samples, 10017-29, 10020-30, and 10084-132, are given. Major and minor constituents were determined both by conventional rock analysis methods and by a new composite scheme utilizing a lithium fluoborate method for dissolution of the samples and atomic absorption spectroscopy and colorimetry. Trace constituents were determined by optical emission spectroscopy involving a d-c arc, air-jet controlled.

On-stream chemical element monitor

International Nuclear Information System (INIS)

Averitt, O.R.; Dorsch, R.R.

1979-01-01

An apparatus and method for on-stream chemical element monitoring are described wherein a multiplicity of sample streams are flowed continuously through individual analytical cells and fluorescence analyses are performed on the sample streams in sequence, together with a method of controlling the time duration of each analysis as a function of the concomitant radiation exposure of a preselected perforate reference material interposed in the sample-radiation source path

Real-time chemical characterization of atmospheric particulate matter in China: A review

Science.gov (United States)

Li, Yong Jie; Sun, Yele; Zhang, Qi; Li, Xue; Li, Mei; Zhou, Zhen; Chan, Chak K.

2017-06-01

Atmospheric particulate matter (PM) pollution has become a major health threat accompanying the rapid economic development in China. For decades, filter-based offline chemical analyses have been the most widely adopted means to investigate PM and have provided much information for understanding this type of pollution in China. However, offline analyses have low time resolutions and the chemical information thus obtained fail to reflect the dynamic nature of the sources and the rapid processes leading to the severe PM pollution in China. In recent years, advances in real-time PM chemical characterization have created a new paradigm for PM studies in China. In this review, we summarize those advances, focusing on the most widely used mass spectrometric and ion chromatographic techniques. We describe the findings from those studies in terms of spatiotemporal variabilities, degree of neutralization and oxygenation, source apportionment, secondary formation, as well as collocated measurements of the chemical and physical (hygroscopic and optical) properties of PM. We also highlight the new insights gained from those findings and suggest future directions for further advancing our understanding of PM pollution in China via real-time chemical characterization.

Informatización del proceso editorial del semanario ¡ahora!, aspectos tecnológicos y empresariales

Directory of Open Access Journals (Sweden)

María del Carmen Rodríguez Hernández

2010-01-01

Full Text Available Se abordaron aspectos relevantes del proceso ingenieril como los criterios inmersos en las tecnologías de desarrollo, base de datos, arquitectura de despliegue y concepciones de seguridad de información en el entorno de integración; expuestos desde la perspectiva de la gestión de información de las rutinas productivas inmersas en el proceso editorial de un semanario. El flujo y gestión de la información entre los diversos entes transitan por diversas fases y de modo bidireccional. Esa dinámica propia influyó decisivamente en los criterios de eficacia empresarial de la organización, relacionada íntimamente con el tiempo de comunicación, calidad y seguridad de la información.

Non-allergic cutaneous reactions in airborne chemical sensitivity--a population based study

DEFF Research Database (Denmark)

Berg, Nikolaj Drimer; Linneberg, Allan; Thyssen, Jacob Pontoppidan

2011-01-01

the relationship between cutaneous reactions from patch testing and self-reported severity of chemical sensitivity to common airborne chemicals. A total of 3460 individuals participating in a general health examination, Health 2006, were patch tested with allergens from the European standard series and screened...... for chemical sensitivity with a standardised questionnaire dividing the participants into four severity groups of chemical sensitivity. Both allergic and non-allergic cutaneous reactions--defined as irritative, follicular, or doubtful allergic reactions--were analysed in relationship with severity of chemical...... most severe groups of self-reported sensitivity to airborne chemicals. When adjusting for confounding, associations were weakened, and only non-allergic cutaneous reactions were significantly associated with individuals most severely affected by inhalation of airborne chemicals (odds ratio = 2.5, p = 0...

Chemical Functionalization and Characterization of Cellulose Extracted from Wheat Straw Using Acid Hydrolysis Methodologies

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Chemar J. Huntley

2015-01-01

Full Text Available The nonuniform distribution of cellulose into many composite materials is attributed to the hydrogen bonding observed by the three hydroxyl groups located on each glucose monomer. As an alternative, chemical functionalization is performed to disrupt the strong hydrogen bonding behavior without significant altering of the chemical structure or lowering of the thermal stability. In this report, we use wheat straw as the biomass source for the extraction of cellulose and, subsequently, chemical modification via the Albright-Goldman and Jones oxidation reactions. X-ray diffraction analyses reveal that upon oxidation a slight change in the cellulose polymorphic structure (CI to CII can be observed when compared to its unmodified counterpart. Scanning electron microscopy analyses show that the oxidized cellulose structure exhibits fiber-like crystals with lengths and diameters on the micrometer scale. Thermal analyses (differential scanning calorimetry and thermogravimetric analysis show an increase in the thermal stability for the modified cellulose at extremely high temperatures (>300°C.

Aspectos da sexualidade na adolescência Aspects of sexuality in adolescence

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José Roberto da Silva Brêtas

2011-07-01

Full Text Available O estudo envolveu 920 adolescentes entre 12 e 19 anos de idade em escolas de ensino fundamental e médio da região de Santo Eduardo do município de Embu, São Paulo. Teve por objetivo identificar aspectos da sexualidade de adolescentes de ambos os sexos. Os dados foram obtidos por meio de um questionário estruturado, cujos resultados demonstraram a equivalência entre garotas e rapazes com relação à busca de informações específicas sobre sexualidade; 39% dos rapazes e 17% das garotas tinham prática sexual, destes, 77% dos rapazes e 84% das garotas utilizavam preservativo.The study involved 920 adolescents between 12 and 19 years of age in junior and senior high schools of the region of Santo Eduardo of the city of Embu, São Paulo. The objective was to identify aspects of sexuality of adolescents of both sexes. Data were collected through a structured questionnaire, the results of which established the difference between boys and girls with respect to their quest for specific information about sexuality; 39% of boys and 17% of girls practiced sexual intercourse, and among these, 77% of boys and 84% of girls used preservativos.

Desafío en el diseño de MOOCs: incorporación de aspectos para la colaboración y la gamificación

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Carina S. González

2016-01-01

Full Text Available En la actualidad, existe una gran cantidad de cursos MOOCs ofrecidos por diferentes proveedores, tales como MiriadaX, Coursera y edx, que se conforman a través de elementos independientes (charlas estilo TEDx, libros de texto digitales o programas de televisión educativos, y donde cada uno estos elementos ha sido diseñado y elaborado por un único profesor, como parte de una serie de vídeos con contenido digital, que se emitirá a un público de estudiantes que agradecerán dicho contenido audiovisual. Sin embargo, lo ideal es que los MOOCs impliquen procesos de colaboración en el que tanto profesores como alumnos, puedan participar en el diseño y de esta forma, utilizar de manera más eficaz estos cursos. En este sentido, nos encontramos ante el desafío de incorporar aspectos de colaboración en MOOCs, lo cual no es una tarea sencilla ya que implica el diseño y la organización de actividades que fomenten la colaboración real entre los participantes. Asimismo, son muy importantes los aspectos motivacionales para evitar el abandono de los cursos y favorecer el aprendizaje. En este punto, considerar algunas técnicas de gamificación para favorecer el aprendizaje puede resultar un factor determinante. Por ello, en este artículo se presenta una propuesta que incluye aspectos de colaboración y técnicas de gamificación en la planificación, diseño, implementación y uso de MOOCs. Además, se presenta una arquitectura tecnológica que permite el aprendizaje ubicuo basada en la Arquitectura de Formación y Aprendizaje (TLA.

Sarcoma de Ewing: aspectos clínicos e radiográficos de 226 casos Ewing's sarcoma: clinical and radiographic aspects of 226 cases

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Julian Catalan

2005-09-01

Full Text Available OBJETIVO: Avaliar os aspectos radiográficos e clínicos presentes em pacientes com o diagnóstico de sarcoma de Ewing confirmado por histopatologia. MATERIAIS E MÉTODOS: Foram analisados, neste trabalho, os dados clínicos e radiográficos (quando disponíveis de 226 pacientes com o diagnóstico de sarcoma de Ewing ósseo. RESULTADOS: Dos casos avaliados, 61,5% (139 eram do sexo masculino e 83,7% (189 eram brancos. A mediana de idade dos pacientes foi de 14 anos e a topografia mais freqüente das lesões foi o osso ilíaco, em 13,7% (31 dos casos. O aspecto radiográfico mais comum foi o de lesão lítica com reação periosteal (padrões variados, em 32,7% (74 dos casos. CONCLUSÃO: O sarcoma de Ewing ósseo é uma neoplasia bastante agressiva, ocorrendo mais comumente em indivíduos na segunda década de vida e cujo aspecto radiográfico mais comum é o de lesão lítica com reação periosteal típica de lesão agressiva.OBJECTIVE: To review the clinical and radiographic findings in patients with histologically confirmed Ewing's sarcoma. MATERIALS AND METHODS: Clinical and radiological (whenever available data of 226 patients with Ewing's sarcoma of the bone were analyzed. RESULTS: Of the evaluated cases, 61.5% (139 were male and 83.7% (189 were white. The average age was 14 years old and the most common site of the lesions was the iliac bone, seen in 13.7% (31 of the cases. The most common radiological findings were lytic lesion with periosteal reaction, seen in 32.7% (74 of the patients. CONCLUSION: Ewing's sarcoma of bone is an aggressive neoplasm, occurring mainly in the second decade of life, which main radiological findings are lytic lesions with periosteal reaction, typical characteristic of aggressive lesions.

ANÁLISIS DE LA INGENIERÍA DE REQUISITOS ORIENTADA POR ASPECTOS SEGÚN LA INDUSTRIA DEL SOFTWARE

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Luis Fernando Londoño

2008-07-01

Full Text Available La aplicación de buenas prácticas en la gestión de requisitos de software es una condición fundamental para lograr productos de calidad. Por lo tanto, es importante que las compañías de desarrollo de software mantengan una investigación constante alrededor de nuevas técnicas que mejoren actividades de requisitos tales como levantamiento, especificación y modelado. En este artículo se presenta un estudio de los enfoques más representativos de la ingeniería de requisitos orientada por aspectos que podrían ayudar a resolver problemas que enfrentan las compañías de software durante las etapas tempranas de desarrollo. Se hace un análisis comparativo entre los enfoques, a partir de los criterios de alcance, trazabilidad, composición de requisitos, manejo de conflictos, mapeo, validación-verificación y escalabilidad. Los resultados obtenidos permiten detectar las oportunidades que el enfoque de aspectos ofrece para mejorar el proceso de los requisitos.Applying good practices to manage software requirements is a basic condition to obtain quality products. Therefore, it is important that software companies maintain a constant research around of new techniques and mechanisms to improve requirements activities such as elicitation, specification, and modeling. In this paper, we present a study of most representative aspect-oriented requirement approaches in order to analyze the way how these could support issues confronted by software companies during early stages of the lifecycle. Thus, we make a comparative analysis among approaches under criteria defined such as scope, traceability, requirements composition, conflict management, mapping, validation-verification, and scalability. Results achieved allowing us to know opportunities offered by aspect-oriented approaches so as to improve the requirement process.

Operational and biological analyses of branched water-adjustment and combined treatment of wastewater from a chemical industrial park.

Science.gov (United States)

Xu, Ming; Cao, Jiashun; Li, Chao; Tu, Yong; Wu, Haisuo; Liu, Weijing

2018-01-01

The combined biological processes of branched water-adjustment, chemical precipitation, hydrolysis acidification, secondary sedimentation, Anoxic/Oxic and activated carbon treatment were used for chemical industrial wastewater treatment in the Taihu Lake Basin. Full-scale treatment resulted in effluent chemical oxygen demand, total nitrogen, NH 3 -N and total phosphorus of 35.1, 5.20, 3.10 and 0.15 mg/L, respectively, with a total removal efficiency of 91.1%, 67.1%, 70.5% and 89.3%, respectively. In this process, short-circuited organic carbon from brewery wastewater was beneficial for denitrification and second-sulfate reduction. The concentration of effluent fluoride was 6.22 mg/L, which also met the primary standard. Gas Chromatography-Mass Spectrometry analysis revealed that many types of refractory compounds were present in the inflow. Microbial community analysis performed in the summer by PCR-denaturing gradient gel electrophoresis and MiSeq demonstrated that certain special functional bacteria, such as denitrificans, phosphorus-accumulating bacteria, sulfate- and perhafnate-reducing bacteria, aromatic compound-degrading bacteria and organic fluoride-degrading bacteria, present in the bio-tanks were responsible for the acceptable specific biological pollutant reduction achieved.

Views on chemical safety information and influences on chemical disposal behaviour in the UK

International Nuclear Information System (INIS)

Hinks, J.; Bush, J.; Andras, P.; Garratt, J.; Pigott, G.; Kennedy, A.; Pless-Mulloli, T.

2009-01-01

This study examined how groups representing four tiers in the chemical supply chain (manufacturers, vendors, workers and consumers) understood safety information, and the factors that influenced disposal behaviour. Data from seven, semi-structured, focus groups was analysed both qualitatively (textual analysis) and quantitatively (network analysis). Such combined analytical methods enabled us to achieve both detailed insights into perceptions and behaviour and an objective understanding of the prevailing opinions that occurred within and between the focus group discussions. We found issues around awareness, trust, access and disposal behaviours differed between groups within the supply chain. Participants from the lower tiers perceived chemical safety information to be largely inaccessible. Labels were the main source of information on chemical risks for the middle and bottom tiers of the supply chain. Almost all of the participants were aware of the St Andrew's Cross and skull and crossbones symbols but few were familiar with the Volatile Organic Compound logo or the fish and tree symbol. Both the network and thematic analysis demonstrated that whilst frequent references to health risks associated with chemicals were made environmental risks were usually only articulated after prompting. It is clear that the issues surrounding public understanding of chemical safety labels are highly complex and this is compounded by inconsistencies in the cognitive profiles of chemical users. Substantially different cognitive profiles are likely to contribute towards communication difficulties between different tiers of the supply chain. Further research is needed to examine the most effective ways of communicating chemical hazards information to the public. The findings demonstrate a need to improve and simplify disposal guidance to members of the public, to raise public awareness of the graphic symbols in the CHIP 3.1, 2005 regulations and to improve access to disposal guidance

Fate of chemical warfare agents and toxic industrial chemicals in landfills.

Science.gov (United States)

Bartelt-Hunt, Shannon L; Barlaz, Morton A; Knappe, Detlef R U; Kjeldsen, Peter

2006-07-01

One component of preparedness for a chemical attack is planning for the disposal of contaminated debris. To assess the feasibility of contaminated debris disposal in municipal solid waste (MSW) landfills, the fate of selected chemical warfare agents (CWAs) and toxic industrial chemicals (TICs) in MSW landfills was predicted with a mathematical model. Five blister agents [sulfur mustard (HD), nitrogen mustard (HN-2), lewisite (L), ethyldichloroarsine (ED), and phosgene oxime (CX)], eight nerve agents [tabun (GA), sarin (GB), soman (GD), GE, GF, VX, VG, and VM], one riot-control agent [CS], and two TICs [furan and carbon disulfide] were studied. The effects of both infiltration (climate) and contaminant biodegradability on fate predictions were assessed. Model results showed that hydrolysis and gas-phase advection were the principal fate pathways for CWAs and TICs, respectively. Apart from CX and the TICs, none of the investigated compounds was predicted to persist in a landfill for more than 5 years. Climate had little impact on CWA/TIC fate, and biodegradability was only important for compounds with long hydrolysis half-lives. Monte Carlo simulations were performed to assess the influence of uncertainty in model input parameters on CWA/TIC fate predictions. Correlation analyses showed that uncertainty in hydrolysis rate constants was the primary contributor to variance of CWA fate predictions, while uncertainty in the Henry's Law constant and landfill gas-production rate accounted for most of the variance of TIC fate predictions. CWA hydrolysates were more persistent than the parent CWAs, but limited information is available on abiotic or biotic transformation rates for these chemicals.

Gagueira e disfluência comum na infância: análise das manifestações clínicas nos seus aspectos qualitativos e quantitativos Stuttering and common dysfluency in childhood: analyses of clinical manifestations in their qualitative and quantitative aspects

Directory of Open Access Journals (Sweden)

Suzana Maria de Amarante Merçon

2007-06-01

Full Text Available OBJETIVO: analisar em seus aspectos qualitativos e quantitativos as manifestações clínicas da gagueira e da disfluência comum na faixa etária de dois a seis anos. MÉTODOS: revisão de Literatura Sistemática a partir de livros e artigos científicos de Fonoaudiologia indexados no LILACS e no MEDLINE de 1993 a 2005. RESULTADOS: as diferenças qualitativas mais importantes são: o tipo de unidade lingüística na qual as disfluências ocorrem, tipologias de disfluências, presença ou ausência de esforço físico durante a fala e possíveis dificuldades na linguagem. Pré-escolares com gagueira freqüentemente apresentam dificuldades em competências metalinguísticas, especialmente com as metafonológicas, sendo que mais estudos sobre este aspecto são necessários. A freqüência de sílabas disfluentes e a taxa de elocução verbal estão entre os parâmetros quantitativos significativos. CONCLUSÃO: diferenças na fala e na linguagem parecem ser fatores importantes para distinguir gagueira de disfluências comuns infantis.PURPOSE: to examine the clinical manifestations of stuttering and common dysfluency in their qualitative and quantitative aspects, in children between the ages of two and six years old. METHODS: systematic literature review from books and indexed scientific articles on speech pathology in LILACS and MEDLINE from 1993 to 2005. RESULTS: the most important qualitative differences are: the kind of linguistic unit where dysfluency occur, dysfluency typologies, the presence or absence of physical effort during the speech and possible language difficulties. Preschoolers who stutter very often show difficulties in metalinguistic competencies, especially with the metaphonological ones and more studies about this aspect are needed. The frequency of diffluent syllables and the rate of verbal elocution are among the significant quantitative aspects. CONCLUSION: differences in the speech and in the language seem to be important

Mitología Cosmogónica, Arte Mesoamericano y Cine Animado. Revisión de los aspectos formales del personaje mitológico de Mesoamérica Prehispánica. La serpiente emplumada, en producciones audiovisuales animadas.

OpenAIRE

SILVA MONTELLANO, FELIPE JAVIER

2011-01-01

Examina la representación de la figura mitológica central de Mesoamérica Prehispánica en audiovisuales animados. Como nuestra formación es en el área de las comunicaciones, específicamente, en la creación y observación de audiovisuales animados, advertimos ciertos fallos en la interpretación de aspectos culturales en los audiovisuales animados. Lo que nos lleva a plantear un mecanismo de análisis, con el cual revisamos cómo han sido reinterpretados los aspectos formales de un personaje mit...

On the Complexity of Reconstructing Chemical Reaction Networks

DEFF Research Database (Denmark)

Fagerberg, Rolf; Flamm, Christoph; Merkle, Daniel

2013-01-01

The analysis of the structure of chemical reaction networks is crucial for a better understanding of chemical processes. Such networks are well described as hypergraphs. However, due to the available methods, analyses regarding network properties are typically made on standard graphs derived from...... the full hypergraph description, e.g. on the so-called species and reaction graphs. However, a reconstruction of the underlying hypergraph from these graphs is not necessarily unique. In this paper, we address the problem of reconstructing a hypergraph from its species and reaction graph and show NP...

Placentação em cutias (Dasyprocta aguti, CARLETON, M.D.: aspectos morfológicos

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Rosângela Felipe Rodrigues

2003-01-01

Full Text Available A cutia é um roedor silvestre, encontrado no sul da América Central e em regiões tropicais da América do Sul, principalmente nas regiões norte, nordeste e sudeste do Brasil. Estes animais fornecem proteína de origem animal e por isso, apresentam importância sócio-econômica para as regiões do norte e nordeste do Brasil. Para o presente trabalho foram utilizadas sete placentas de cutias (Dasyprocta aguti, em diferentes fases da gestação. Nos aspectos morfológicos a placenta da cutia apresenta uma forma esférica e uma estrutura lobada estando conecta ao útero através da mesoplacenta. O fluxo sangüíneo fetal flui do interlobo para o centro do lobo, ou seja, centripetamente, enquanto que o materno flui centrifugamente.

Analytical Methods for Chemical and Sensory Characterization of Scent-Markings in Large Wild Mammals: A Review

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Simone B. Soso

2014-03-01

Full Text Available In conjoining the disciplines of “ethology” and “chemistry” the field of “Ethochemistry” has been instituted. Ethochemistry is an effective tool in conservation efforts of endangered species and the understanding of behavioral patterns across all species. Chemical constituents of scent-markings have an important, yet poorly understood function in territoriality, reproduction, dominance, and impact on evolutionary biology, especially in large mammals. Particular attention has recently been focused on scent-marking analysis of great cats (Kalahari leopards (Panthera pardus, puma (Puma concolor snow leopard (Panthera uncia, African lions (Panthera leo, cheetahs (Acinonyx jubatus, and tigers (Panthera tigris for the purpose of conservation. Sensory analyses of scent-markings could address knowledge gaps in ethochemistry. The objective of this review is to summarize the current state-of-the art of both the chemical and sensory analyses of scent-markings in wild mammals. Specific focus is placed on sampling and sample preparation, chemical analysis, sensory analysis, and simultaneous chemical and sensory analyses. Constituents of exocrine and endocrine secretions have been most commonly studied with chromatography-based analytical separations. Odor analysis of scent-markings provides an insight into the animal’s sensory perception. A limited number of articles have been published in the area of sensory characterization of scent marks. Simultaneous chemical and sensory analyses with chromatography-olfactometry hyphenation could potentially aid conservation efforts by linking perceived odor, compounds responsible for odor, and resulting behavior.

Edema cerebral em meningiomas: aspectos radiológicos e histopatológicos

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Souto Antonio Aversa do

2002-01-01

Full Text Available Diversos fatores têm sido associados ao desenvolvimento de edema peritumoral nos meningiomas. Foram estudados os aspectos radiológicos e anátomo-patológicos de 51 meningiomas intracranianos operados no Hospital Universitário Clementino Fraga Filho (HUCFF. Dois terços dos meningiomas apresentavam edema perilesional. O tamanho dos meningiomas correlacionou-se com a presença de edema, sendo mais frequente nos meningiomas grandes (>4cm. A localização parece, também, influenciar no desenvolvimento do edema peritumoral, sendo mais acentuado nos meningiomas da asa do esfenóide e incomum nos meningiomas do tubérculo selar. Os subtipos histológicos de meningioma não se correlacionaram com a intensidade do edema peritumoral. Dos diversos mediadores químicos descritos na literatura recente relacionados ao desenvolvimento de edema peritumoral em tumores intracranianos, destaca-se o fator de crescimento do endotélio vascular (VEGF. A expressão nos meningiomas do VEGF e de seu receptor flk-1 foi estudada com técnica imuno-histoquímica, demonstrando a sua expressão nas células tumorais.

Aspectos de Ortega y Gasset en la formación de ciudadanos

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Miguel RUMAYOR

2016-05-01

Full Text Available José Ortega y Gasset no puede ser clasificado como teórico o filósofo de la educación, aunque sus obras poseen importantes reflexiones en ese ámbito del conocimiento. Concretamente en este artículo se pone de manifiesto el valor de la filosofía racio-vitalista y la formación de ciudadanos en la perspectiva personal, lo cual contribuirá a la construcción de la sociedad y a la vida democrática. Además, a la luz del liberalismo político de este autor en el artículo se analizan, ente otras, sus importantes ideas sobre la libertad, el patriotismo, la ciudadanía, la elegancia y la tolerancia, como grandes aportaciones conceptuales a la tarea educativa. Básicamente todo el pensamiento de Ortega se concretará en formar profundamente la intimidad personal de los ciudadanos. Este elemento se muestra como el centro y el objetivo de la formación y en torno a él giran los aspectos sociales y personales de la educación de ciudadanos analizados en este escrito.

Aspectos biológico-pesqueros del pejerrey (Odontesthes regia regia) en el puerto de Ilo durante 1996-1998

OpenAIRE

Hugo Treviño; Walter Condori; Martín Zambrano

2014-01-01

Se analizaron los aspectos biológicos y pesqueros del pejerrey peruano (Odontesthes regia regia) población en Ilo, desde enero de 1996 a septiembre de 1998. Las capturas fueron tres veces más alta (72,76 t) que las de 1996 hasta 1997, mientras que con el calentamiento de "El Niño" en 1998 éstas se redujeron a 0,62 t. Durante el evento "El Niño 1997-1998" la población mostró también una serie de cambios en la distribución, la reproducción y la composición de la dieta. Estos cambios se asociaro...

Rapid chemical analysis of allanite

International Nuclear Information System (INIS)

Nishiyama, Goro; Hayashi, Hiroshi

1981-01-01

Rapid chemical analysis of allanite was studied by atomic absorption spectrophotometry. Powdered sample was fused with mixture of sodium carbonate anhydrous and borax (4 : 1 weight) in platinum crucible and sample solution was prepared. SiO 2 , Fe 2 O 3 , Al 2 O 3 , MnO and rare earth metals were determined by atomic absorption spectrophotometry, CaO, MgO and Ce 2 O 3 by titration, ThO 2 by colorimetry, and La 2 O 3 by flame photometry respectively. For sample solution treated with hydrofluoric acid and sulfuric acid. Na 2 O and K 2 O were determined by atomic absorption spectrophotometry, TiO 2 and P 2 O 5 by colorimetry. Chemical analyses for four samples were carried out and gave consistent results. (author)

Aspectos geográficos de Checoslovaquia

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Vaclar Kaspar

1980-01-01

Full Text Available These lectures on geographical aspects of Tchecoslovaquia deal mainly with: relationship between industry and pollution; water control; national parks and environment protection. The main tendencies of the industrial and agricultural evolution of Tchecoslovaquia, as well as those of other socialist countries of Europe, are also analysed.

Cosmetics Europe compilation of historical serious eye damage/eye irritation in vivo data analysed by drivers of classification to support the selection of chemicals for development and evaluation of alternative methods/strategies: the Draize eye test Reference Database (DRD).

Science.gov (United States)

Barroso, João; Pfannenbecker, Uwe; Adriaens, Els; Alépée, Nathalie; Cluzel, Magalie; De Smedt, Ann; Hibatallah, Jalila; Klaric, Martina; Mewes, Karsten R; Millet, Marion; Templier, Marie; McNamee, Pauline

2017-02-01

A thorough understanding of which of the effects assessed in the in vivo Draize eye test are responsible for driving UN GHS/EU CLP classification is critical for an adequate selection of chemicals to be used in the development and/or evaluation of alternative methods/strategies and for properly assessing their predictive capacity and limitations. For this reason, Cosmetics Europe has compiled a database of Draize data (Draize eye test Reference Database, DRD) from external lists that were created to support past validation activities. This database contains 681 independent in vivo studies on 634 individual chemicals representing a wide range of chemical classes. A description of all the ocular effects observed in vivo, i.e. degree of severity and persistence of corneal opacity (CO), iritis, and/or conjunctiva effects, was added for each individual study in the database, and the studies were categorised according to their UN GHS/EU CLP classification and the main effect driving the classification. An evaluation of the various in vivo drivers of classification compiled in the database was performed to establish which of these are most important from a regulatory point of view. These analyses established that the most important drivers for Cat 1 Classification are (1) CO mean ≥ 3 (days 1-3) (severity) and (2) CO persistence on day 21 in the absence of severity, and those for Cat 2 classification are (3) CO mean ≥ 1 and (4) conjunctival redness mean ≥ 2. Moreover, it is shown that all classifiable effects (including persistence and CO = 4) should be present in ≥60 % of the animals to drive a classification. As a consequence, our analyses suggest the need for a critical revision of the UN GHS/EU CLP decision criteria for the Cat 1 classification of chemicals. Finally, a number of key criteria are identified that should be taken into consideration when selecting reference chemicals for the development, evaluation and/or validation of alternative methods and

A comprehensive study of the toxicity of natural multi-contaminated sediments: New insights brought by the use of a combined approach using the medaka embryo-larval assay and physico-chemical analyses.

Science.gov (United States)

Barjhoux, Iris; Clérandeau, Christelle; Menach, Karyn Le; Anschutz, Pierre; Gonzalez, Patrice; Budzinski, Hélène; Morin, Bénédicte; Baudrimont, Magalie; Cachot, Jérôme

2017-08-01

Sediment compartment is a long term sink for pollutants and a secondary source of contamination for aquatic species. The abiotic factors controlling the bioavailability and thus the toxicity of complex mixtures of pollutants accumulated in sediments are poorly documented. To highlight the different factors influencing sediment toxicity, we identified and analyzed the physico-chemical properties, micro-pollutant contents, and toxicity level of six contrasted sediments in the Lot-Garonne continuum. Sediment toxicity was evaluated using the recently described Japanese medaka (Oryzias latipes) embryo-larval assay with direct exposure to whole sediment (MELAc). Multiple toxicity endpoints including embryotoxicity, developmental defects and DNA damage were analyzed in exposed embryos. Chemical analyses revealed significant variations in the nature and contamination profile of sediments, mainly impacted by metallic trace elements and, unexpectedly, polycyclic aromatic hydrocarbons. Exposure to sediments induced different toxic impacts on medaka early life stages when compared with the reference site. Principal component analysis showed that the toxic responses following exposure to sediments from the Lot River and its tributary were associated with micro-pollutant contamination: biometric measurements, hatching success, genotoxicity, craniofacial deformities and yolk sac malabsorption were specifically correlated to metallic and organic contaminants. Conversely, the main biological responses following exposure to the Garonne River sediments were more likely related to their physico-chemical properties than to their contamination level. Time to hatch, cardiovascular injuries and spinal deformities were correlated to organic matter content, fine particles and dissolved oxygen levels. These results emphasize the necessity of combining physico-chemical analysis of sediment with toxicity assessment to accurately evaluate the environmental risks associated with sediment

Method of chemical analysis of silicate rocks (1962); Methode d'analyse chimique des roches silicatees (1962)

Energy Technology Data Exchange (ETDEWEB)

Pouget, R [Commissariat a l' Energie Atomique, Fontenay-aux-Roses (France). Centre d' Etudes Nucleaires

1962-07-01

A rapid method of analysis for the physical and chemical determination of the major constituents of silicate rocks is described. Water losses at 100 deg. C and losses of volatile elements at 1000 deg. C are estimated after staying in oven for these temperatures, or by mean of a thermo-balance. The determination of silica is made by a double insolubilization with hydrochloric acid on attack solution with sodium carbonate; total iron and aluminium, both with calcium and magnesium, after ammoniacal precipitation of Fe and Al, are determined on the filtration product of silica by titrimetry-photometry of their complexes with EDTA. The alkalis Na and K by flame spectrophotometry, Mn by colorimetry of the permanganate, and Ti by mean of his complex with H{sub 2}O{sub 2}, are determined on fluosulfuric attack solution. Phosphorus is determined by his complex with 'molybdenum blue' on a fluoro-nitro-boric attack solution; iron is estimated by potentiometry, with the help of bichromate on hydrofluoric solution. (author) [French] Une methode d'analyse rapide est decrite pour la determination physico-chimique des constituants principaux des roches silicatees. Les pertes en eau a 100 deg. C et en matieres volatiles a 1000 deg. C sont evaluees apres passage au four a ces temperatures, ou a l'aide d'une thermobalance. La determination de la silice se fait par double insolubilisation a l'acide chlorhydrique, sur une attaque au carbonate de sodium; le fer total et l'aluminium ainsi que le calcium et le magnesium, apres precipitation a l'ammoniaque des deux premiers metaux, sont determines sur le filtrat de la silice par titrimetrie-photometrie de leurs complexes avec l'E.D.T.A. Les alcalins sodium et potassium par spectrophotometrie de flamme, le manganese par colorimetrie du permanganate, le titane a l'aide de son complexe avec l'eau oxygenee, sont determines sur une attaque fluosulfurique. Le phosphore est determine par son complexe du 'bleu de molybdene' sur une attaque fluo

Chemical leasing in the context of sustainable chemistry.

Science.gov (United States)

Moser, Frank; Karavezyris, Vassilios; Blum, Christopher

2015-05-01

Chemical leasing is a new and innovative approach of selling chemicals. It aims at reducing the risks emanating from hazardous substances and ensuring long-term economic success within a global system of producing and using chemicals. This paper explores how, through chemical leasing, the consumption of chemicals, energy, resources and the generation of related wastes can be reduced. It also analyses the substitution of hazardous chemicals as a tool to protect environmental, health and safety and hence ensure compliance with sustainability criteria. For this, we are proposing an evaluation methodology that seeks to provide an answer to the following research questions: (1) Does the application of chemical leasing promote sustainability in comparison to an existing chemicals production and management system? 2. If various chemical leasing project types are envisaged, which is the most promising in terms of sustainability? The proposed methodology includes a number of basic goals and sub-goals to assess the sustainability for eight different chemical leasing case studies that have been implemented both at the local and the national levels. The assessment is limited to the relative assessment of specific case studies and allows the comparisons of different projects in terms of their relative contribution to sustainable chemistry. The findings of our assessment demonstrate that chemical leasing can be regarded as promoting sustainable chemistry in five case studies with certainty. However, on the grounds of our assessment, we cannot conclude with certainty that chemical leasing has equivalent contribution to sustainable chemistry in respect of three further case studies.

Biobanco do Hospital de Clínicas de Porto Alegre: Aspectos Técnicos, Éticos, Jurídicos e Sociais

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Patrícia Ashton-Prolla

2009-05-01

Full Text Available As atividades de pesquisa em saúde cada vez mais necessitam do armazenamento de materiais biológicos em biorepositórios e em biobancos. O estabelecimento de políticas institucionais para lidar com aspectos técnicos, éticos, legais e sociais é imprescindível para garantir a sua adequação. O Hospital de Clínicas de Porto Alegre está com um projeto de desenvolvimento em execução para propiciar que estas atividades sejam harmônicas e integradas.

Luis de León (1527-1591 y su teoría de la justicia: aspectos principales de su doctrina

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Sebastián Contreras

2014-04-01

Full Text Available Las investigaciones sobre Luis de León se han centrado, sobre todo, en su mística, narrativa y teoría literaria. En este trabajo, el autor intenta desarrollar los principales aspectos de su teoría jurídica. Al igual que otros grandes teólogos de la Escuela de Salamanca, también León ha estudiado el problema de la naturaleza de la ley humana y su vinculación con el derecho natural. Éste es, justamente, el tema del siguiente trabajo.

Análise de aspectos ergonômicos do colete tático - um estudo de caso na ROCAM-RN

OpenAIRE

Costa, Karla Cristina Tavares

2014-01-01

A presente dissertação tem como objetivo analisar os aspectos ergonômicos e funcionais do colete tático dos motopatrulheiros da polícia militar do RN e apresentar uma contribuição visando melhorar suas características técnicas conciliando agradabilidade e função tática, melhorando as condições laborais do motopatrulheiro. Partimos da seguinte hipótese: Considerando que os policiais customizam seus coletes táticos e observando como criam seus layouts e fazem uso dos dispositivos presentes n...

Um aspecto da diversidade cultural do caboclo amazônico: a religião

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Raymundo Heraldo Maués

2005-04-01

Full Text Available ESTE TRABALHO trata de um aspecto da diversidade cultural do caboclo amazônico, isto é, a religião. Esta se constitui numa espécie de catolicismo popular, que mantém relações com o xamanismo nativo - a pajelança cabocla -, e que se originou de antigas práticas e crenças dos índios Tupinambás, que habitaram parte da região amazônica no período colonial, bem como de influências portuguesas e africanas.HIS PAPER deals with a particular aspect of the Amazon caboclo's cultural diversity, namely, religion. Caboclo religion represents a form of folk Catholicism, witch is related to native shamanism - pajelança cabocla -, originating from practices and beliefs of the Tupinambá Indians, who inhabited part of the Amazon Region in colonial times, and cultural influences from Portuguese colonialists and African slaves.

La profesionalización del recurso humano policial. Aspectos curriculares que se deben contemplar

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María Gabriela Arce Navarro

2008-01-01

Full Text Available Este artículo desarrolla una propuesta de organización curricular que garantice el alcance de los objetivos, metas y funciones encomendadas a la Escuela Nacional de Policía, entidad a la que le ha sido conferida la potestad para formar y capacitar a las personas encargadas de velar por la seguridad ciudadana de nuestro país. La propuesta considera elementos aún no establecidos por este centro educativo, aportando avances curriculares significativos para la futura implementación del currículo. Por otro lado, describe los componentes que caracterizan el actual currículo de la Escuela, develando aspectos relevantes sobre la formación y capacitación policial, así como la apertura de esta Institución a los enfoques por competencias laborales, campo en el que incursionó con la implementación del actual Curso Básico Policial por Competencias Laborales.

O processo de internacionalização e os aspectos socioambientais: o caso Embraer

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Isak Kruglianskas

2008-04-01

Full Text Available O objetivo deste trabalho é colaborar para que se compreenda se a capacidade de uma organização competir em um mercado internacional pode ser influenciada por questões relacionadas aos aspectos socioambientais que a envolvem, com base nos diferentes contextos em que esta passa a operar. O estudo, de caráter exploratório e descritivo, trata da análise do processo de internacionalização da Embraer, e pautou-se na estratégia de um estudo de caso único e, como meio de coleta de dados, foi escolhida a entrevista pessoal em profundidade, além de utilização de dados de fontes secundárias. O ponto de destaque como resultado é a necessidade da indústria de aviação se reestruturar sob um novo enfoque, que valorize as variáveis sociais e ambientais, sob pena de sua própria sobrevivência em longo prazo.

El Convenio de La Haya de 1980 sobre aspectos civiles de la sustracción internacional de menores y su aplicación en Chile: las modalidades de restitución del menor

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Lucía Rizik Mulet

2014-12-01

Full Text Available Para garantizar la restitución de las niñas y niños menores de 16 años que han sido objeto de sustracción internacional con la mayor celeridad posible, el Convenio de La Haya sobre aspectos civiles de la sustracción internacional de menores de 1980 establece tres modalidades o formas para concretar dicho retorno. El presente trabajo analiza estas modalidades, con el fin de resaltar la importancia de ajustar las actuaciones judiciales y administrativas a los requerimientos del Convenio de La Haya sobre aspectos civiles de la sustracción internacional de menores de 1980 y de realizar las modificaciones legales pertinentes para su adecuada implementación.

Aspectos críticos de gestão em empresas desenvolvedoras de software

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Leonardo Rocha Oliviera

2011-12-01

Full Text Available Uma das características das empresas de desenvolvimento de software é a origem técnica dos seus gestores, o que ocasiona alguns problemas na condução da gestão destas empresas. Fatores relacionados com os profissionais envolvidos na prestação do serviço de desenvolvimento de software também possuem impacto na condução da empresa. O objetivo deste trabalho é identificar os diferentes tipos de desafios enfrentados no dia a dia de trabalho destas empresas. Para isso foi realizada revisão de literatura e entrevistados seis profissionais envolvidos em diferentes níveis de gestão em empresas de Porto Alegre/RS. Pelas respostas obtidas nas entrevistas é possível concluir que os principais aspectos críticos envolvidos na gestão de empresas desenvolvedoras de software são similares aos indicados na revisão de literatura como pontos que merecem atenção especial em atividades de gestão.

Meningiomas parasselares: aspectos na ressonância magnética Parasellar meningiomas: magnetic resonance imaging findings

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Alair Augusto S.M.D. dos Santos

2001-02-01

Full Text Available Foram revistos 22 casos de meningiomas parasselares avaliados por ressonância magnética em clínicas privadas nas cidades de Niterói e Rio de Janeiro, RJ. O objetivo deste trabalho é demonstrar os aspectos de imagem encontrados neste tumor. Os equipamentos utilizados tinham 0,5 e 1,0 Tesla, respectivamente, com aquisição de seqüências multiplanares ponderadas em T1 (antes e após a administração de gadolínio e em T2. Os sintomas principais foram cefaléia e alterações visuais, tendo apenas um caso cursado com hiperprolactinemia. O aspecto mais freqüente foi o de massa parasselar hipointensa em T1 e hiperintensa em T2, impregnando-se intensamente pelo gadolínio. A ressonância magnética é útil não apenas na demonstração da lesão mas, sobretudo, na avaliação do comprometimento das estruturas vizinhas, especialmente do seio cavernoso, o que explica as alterações visuais encontradas.We reviewed 22 cases of patients with parasellar meningiomas evaluated with magnetic resonance imaging (MRI in private clinics of the cities of Niterói and Rio de Janeiro, RJ, Brazil. Our aim was to characterize the imaging findings in this type of tumor. MRI scanners with 0.5 and 1.0 Tesla magnets were used for the acquisition of multiplanar T1-weighted (pre- and post-gadolinium administration and T2-weighted images. The main symptoms observed were headache and visual disturbances. Hyperprolactinemia was observed in only one patient. The most frequent imaging finding was a parasellar mass which appeared hypointense on T1-weighted and hyperintense on T2-weighted images, and enhanced intensively after gadolinium administration. MRI is useful to demonstrate the lesion and to assess the damage to adjacent structures, particularly when the patient presents visual disturbances due to involvement of the cavernous sinuses.

Fragrance chemicals in domestic and occupational products

DEFF Research Database (Denmark)

Rastogi, Suresh Chandra; Heydorn, S; Johansen, J D

2001-01-01

Epidemiological studies have described an increasing prevalence of fragrance allergy and indicated an association with hand eczema. 59 domestic and occupational products intended for hand exposure were subjected to gas chromatography-mass spectrometric (GC-MS) analyses to test the hypothesis...... that fragrance chemicals known to have the potential to cause contact allergy but not included in fragrance mix (FM) may be common ingredients in these products. A quantitative analysis of 19 selected fragrances was performed by GC-MS. Further analysis of GC-MS data revealed the presence of 43 other fragrance...... chemicals/groups of fragrance chemicals in the products investigated. Among the 19 target substances the most commonly detected were limonene in 78%, linalool in 61% and citronellol in 47% of the products investigated. The FM ingredients were present in these products with the following frequencies: oak...

Thermal properties of graphite oxide, thermally reduced graphene and chemically reduced graphene

Science.gov (United States)

Jankovský, Ondřej; Sedmidubský, David; Lojka, Michal; Sofer, Zdeněk

2017-07-01

We compared thermal behavior and other properties of graphite oxide, thermally reduced graphene and chemically reduced graphene. Graphite was oxidized according to the Hofmann method using potassium chlorate as oxidizing agent in strongly acidic environment. In the next step, the formed graphite oxide was chemically or thermally reduced yielding graphene. The mechanism of thermal reduction was studied using STA-MS. Graphite oxide and both thermally and chemically reduced graphenes were analysed by SEM, EDS, elemental combustion analysis, XPS, Raman spectroscopy, XRD and BET. These findings will help for the large scale production of graphene with appropriate chemical composition.

Thermal and thermomechanical analyses of WIPP [Waste Isolation Pilot Plant] shaft seals: Topical report RSI-0324

International Nuclear Information System (INIS)

Van Sambeek, L.L.

1987-10-01

Thermal and thermomechanical analyses provided information on the behavior and stability of concrete seals emplaced in a circular shaft. The two types of concrete considered were an expansive salt-saturated concrete for seals located in rock salt or other rock and an expansive freshwater concrete for seals located in nonsalt rock. Thermal analyses determined the temperature rise in the concrete and surrounding rock as a result of the exothermic hydration of the cement in the concretes. The thermomechanical analyses considered time-dependent elastic modulus, thermoelastic expansion, time-dependent chemically induced expansion, and creep of the concrete; thermoelastic behavior of the nonsalt rocks; and thermoelastic and creep behavior of the rock salt. Supplementary analyses determined the effects of pressure loading on a face of the seal as might result from a static brine head or the swelling of a bentonite backfill; the influence of using a reduced elastic modulus for the rock salt; and the effect of eliminating the chemical expansivity of the concrete. Results of interest were the development of radial stress in the seal, the magnitudes of tensile and shear stresses induced in the seal and rock, and the effect of bonding or lack of bonding between the seal and the surrounding rock. The chemical expansivity of the concrete was shown to be important for the development of radial stresses in the seal and at the contact between the seal and the surrounding rock. The shear stresses induced in the seal by the swelling pressure of bentonite become a concern if the radial stresses are not developed. 20 refs., 58 figs., 3 tabs

Evaluacion de la sostenibilidad de la arquitectura, aspectos sociales, culturales, estética e hitos : Evaluation of architecture sustainability, social aspects, lacks, esthetics culturally and milestones

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Raul Cordero Gulá

2015-12-01

Full Text Available Los países emergentes en general son poco consumidores de energía, por tanto tienen poca influencia en la huella de carbono y el daño ecológico al planeta, pero tienen muchas carencias sociales como la falta de vivienda, servicios, problemas de salud, falta de trabajo, etc. Por eso merecen tener una herramienta de evaluación de sostenibilidad arquitectónica que considere todos estos aspectos evaluados desde la óptica de cada cultura y en la que el peso de aspectos como la huella de carbono o el consumo energético no sea el único. Por otra parte esta herramienta evalúa la estética y los hitos arquitectónicos como parte de los aspectos sociales que deberían evaluarse en el mundo, y la propuesta ha sido aplicada en edificios patrimoniales y contemporáneos, realizada como proyecto de investigación de la Universidad de Cuenca, en colaboración con la UPM. Abstract Emerging countries are generally low consumption of energy, and thus have little influence on the carbon footprint and ecological damage to the planet, but instead have many social needs such as homelessness, housing without services, health problems, unemployment, etc. Therefore they deserve an evaluation tool of architectural sustainability which considers the social, housing production, jobs, health, all evaluated from the perspective of each culture and the weight of aspects carbon footprint or energy consumption is not the only one. Moreover this tool evaluates the aesthetic and architectural landmarks as part of the social aspects that should also be evaluated worldwide, and the proposal has been applied in heritage and contemporary buildings, conducted as a research project at the University of Cuenca, in collaboration with UPM.

Inferring the origin of rare fruit distillates from compositional data using multivariate statistical analyses and the identification of new flavour constituents.

Science.gov (United States)

Mihajilov-Krstev, Tatjana M; Denić, Marija S; Zlatković, Bojan K; Stankov-Jovanović, Vesna P; Mitić, Violeta D; Stojanović, Gordana S; Radulović, Niko S

2015-04-01

In Serbia, delicatessen fruit alcoholic drinks are produced from autochthonous fruit-bearing species such as cornelian cherry, blackberry, elderberry, wild strawberry, European wild apple, European blueberry and blackthorn fruits. There are no chemical data on many of these and herein we analysed volatile minor constituents of these rare fruit distillates. Our second goal was to determine possible chemical markers of these distillates through a statistical/multivariate treatment of the herein obtained and previously reported data. Detailed chemical analyses revealed a complex volatile profile of all studied fruit distillates with 371 identified compounds. A number of constituents were recognised as marker compounds for a particular distillate. Moreover, 33 of them represent newly detected flavour constituents in alcoholic beverages or, in general, in foodstuffs. With the aid of multivariate analyses, these volatile profiles were successfully exploited to infer the origin of raw materials used in the production of these spirits. It was also shown that all fruit distillates possessed weak antimicrobial properties. It seems that the aroma of these highly esteemed wild-fruit spirits depends on the subtle balance of various minor volatile compounds, whereby some of them are specific to a certain type of fruit distillate and enable their mutual distinction. © 2014 Society of Chemical Industry.

Chemical information from Auger electron spectroscopy

International Nuclear Information System (INIS)

Madden, H.H.

1981-01-01

The nature of chemical information in Auger electron spectroscopy (AES) data is reviewed with special emphasis on data from solid surface systems. Two strategies are most frequently used to extract this information: (i) measuring and analyzing energy (chemical) shifts in Auger peaks; and (ii) making use of the shapes of Auger signals to determine the chemical environment at the site of the initial core hole. Chemical shift data are primarily illustrated by highlighting the interaction of oxygen with solids; and analyses of these data based on core-level binding-energy shifts, relaxation, and hole--hole interactions are outlined and discussed. Auger transitions that involve valence electrons are usually those for which lineshapes are taken as indications of the local chemistry at the initial core-hole site. Attempts at extracting valence band density-of-states information from lineshapes are proving successful and this approach to the surface chemical information in AES is illustrated with the aid of examples dealing with the interaction of silicon with hydrogen and with oxygen. The use of the AES lineshapes simply as ''fingerprints'' of the core-hole-site chemistry is examined and illustrated by examples which include studies of silicon nitride properties, of solid surface properties related to catalytic reactions, and of passive films on iron. Auger decay activated desorption processes are briefly examined and found to promise new and unique chemical information when combined with conventional AES. Some gas phase AES studies are also briefly reviewed

Physico-chemical composition of unripe (green) plantain and ...

African Journals Online (AJOL)

Post harvest characteristics are important selection criteria in the genetic improvement of starchy staple food crops. This study aimed at determining the proximate chemical constituents of thirteen clones of new plantain and banana hybrids at harvest. Flour was produced and analysed for starch and sugar contents. The pulp ...

Aspectos procesales de la conciliación extrajudicial en derecho del área civil, a la luz de lo previsto en la Ley 640 de 2001

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Gabriel Angel Hernández-Villarreal

2010-03-01

Full Text Available A la par con los beneficios que representa para la descongestión de los despachos judiciales, la conciliación replantea la manera de abordar la solución de los conflictos que se suscitan entre los asociados, y ofrece una directa, pronta y eficaz opción de dirimir las controversias. Los aspectos benéficos que de ella se derivan son, por lo tanto, evidentes. Lo que genera incertidumbre y debate entre los usuarios de la administración de justicia es el específico tema de la conciliación extrajudicial en derecho, que condiciona el ejercicio de la acción a su agotamiento previo. Conscientes de esta situación, y ante la ausencia de posturas doctrinales o jurisprudenciales al respecto, hemos asumido el estudio de esta figura jurídica, tratando de aportar elementos de juicio de índole procesal que contribuyan en alguna medida a dilucidar los aspectos más álgidos que sobre la materia regula la Ley 640 de 2001.

Test plan for Digface Chemical and Radiation Assay System

International Nuclear Information System (INIS)

Akers, D.W.

1993-07-01

The Digface Chemical and Radiation Assay System (CRAS) Project will develop a sensor using Prompt Gamma Neutron Activation Analysis (PGNAA) that can detect the present of hazardous chemicals and radioactive materials. The CRAS is being designed for in situ assay of closed drums and contaminated soils for gamma-ray emitting radionuclides and hazardous elements. The CRAS is based upon the use of 252 Cf PGNAA with a germanium gamma-ray spectrometer as the analyzer. Tasks being performed include determining detection limits for a number of hazardous chemicals and assessing matrix and transmission effects through soil. Initial analyses suggest that the technique is applicable to a number of hazardous materials such as trichloroethane and carbon tetrachloride

Valorisation of chicken feathers: Characterisation of chemical properties.

Science.gov (United States)

Tesfaye, Tamrat; Sithole, Bruce; Ramjugernath, Deresh; Chunilall, Viren

2017-10-01

The characterisation of the chemical properties of the whole chicken feather and its fractions (barb and rachis), was undertaken to identify opportunities for valorizing this waste product. The authors have described the physical, morphological, mechanical, electrical and thermal properties of the chicken feathers and related them to potential valorisation routes of the waste. However, identification of their chemical properties is necessary to complete a comprehensive description of chicken feather fractions. Hence, the chicken feathers were thoroughly characterised by proximate and ultimate analyses, elemental composition, spectroscopic analyses, durability in different solvents, burning test, and hydrophobicity. The proximate analysis of chicken feathers revealed the following compositions: crude lipid (0.83%), crude fibre (2.15%), crude protein (82.36%), ash (1.49%), NFE (1.02%) and moisture content (12.33%) whereas the ultimate analyses showed: carbon (64.47%), nitrogen (10.41%), oxygen (22.34%), and sulphur (2.64%). FTIR analysis revealed that the chicken feather fractions contain amide and carboxylic groups indicative of proteinious functional groups; XRD showed a crystallinity index of 22. Durability and burning tests confirmed that feathers behaved similarly to animal fibre. This reveals that chicken feather can be a valuable raw material in textile, plastic, cosmetics, pharmaceuticals, biomedical and bioenergy industries. Copyright © 2017 Elsevier Ltd. All rights reserved.

Fatty acid composition and its association with chemical and sensory analysis of boar taint.

Science.gov (United States)

Liu, Xiaoye; Trautmann, Johanna; Wigger, Ruth; Zhou, Guanghong; Mörlein, Daniel

2017-09-15

A certain level of disagreement between the chemical analysis of androstenone and skatole and the human perception of boar taint has been found in many studies. Here we analyze whether the fatty acid composition can explain such inconsistency between sensory evaluation and chemical analysis of boar taint compounds. Therefore, back fat samples (n=143) were selected according to their sensory evaluation by a 10-person sensory panel, and the chemical analysis (stable isotope dilution analysis with headspace solid-phase microextraction and gas chromatography-mass spectrometry) of androstenone and skatole. Subsequently a quantification of fatty acids using gas chromatography-flame ionization detection was conducted. The correlation analyses revealed that several fatty acids are significantly correlated with androstenone, skatole, and the sensory rating. However, multivariate analyses (principal component analysis) revealed no explanation of the fatty acid composition with respect to the (dis-)agreement between sensory and chemical analysis. Copyright © 2017 Elsevier Ltd. All rights reserved.

Genetic aspects of strabismus Aspectos genéticos em estrabismo

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Rosane da Cruz Ferreira

2002-03-01

Full Text Available Purpose: To evaluate the genetic aspects of strabismus. Methods: Ophthalmic and orthoptic evaluations were performed prospectively on 110 strabismic probands and 478 relatives. We used 3 different criteria in the diagnosis of strabismus: primary diagnosis (dx1 defined as any manifest horizontal or vertical deviation, a secondary diagnosis (dx2 including esophoria (>7 prism diopters or exophoria (>9 prism diopters, and a tertiary diagnosis (dx3 including abnormal fusional amplitudes, accommodative convergence/accommodation (AC/A ratio, and/or stereopsis; monofixation syndrome; 4 prism diopters base out; and/or abnormal Maddox test responses. Analyses were carried out within mating types. Results: Hypotheses of autosomal dominant or recessive inheritance with no sporadics were rejected. Based on the dx1, 25% of the families had more than one individual affected and there was vertical transmission in 13%; adding dx2 there were 36% of the families with more than one affected and 21% had vertical transmission; and adding dx3, there were 73% with more than one affected and 51% with vertical transmission. Conclusions: There is evidence for a pattern consistent with an autosomal dominant form of strabismus in most families.Objetivo: Avaliar aspectos genéticos em estrabismo. Métodos: Foram realizados exames oftalmológicos e ortópticos prospectivamente em 110 propósitos estrábicos e 478 familiares. Foram usados 3 diferentes critérios no diagnóstico de estrabismo: diagnóstico primário (dx1 foi definido como qualquer desvio horizontal ou vertical manifesto, diagnóstico secundário (dx2 incluiu esoforias (> 7 dioptrias prismáticas ou exoforia (< 9 dioptrias prismáticas e diagnóstico terciário (dx3, que incluiu amplitudes de fusão anormal, relação convergência acomodativa/acomodação (CA/A elevada, estereopsia anormal, síndrome de monofixação, e teste das 4 dioptrias prismáticas e teste de Maddox anormais. A análise dos resultados foi

Bryophytes - an emerging source for herbal remedies and chemical production

DEFF Research Database (Denmark)

Sabovljevic, Marko S.; Sabovljević, Aneta D.; Ikram, Nur Kusaira K.

2016-01-01

biomass in various ecosystems, bryophytes are a seldom part of ethnomedicine and rarely subject to medicinal and chemical analyses. Still, hundreds of novel natural products have been isolated from bryophytes. Bryophytes have been shown to contain numerous potentially useful natural products, including...... loss, plant growth regulators and allelopathic activities. Bryophytes also cause allergies and contact dermatitis. All these effects highlight bryophytes as potential source for herbal remedies and production of chemicals to be used in various products....

Chemical characterization of nuclear materials: recent trends

International Nuclear Information System (INIS)

Prakash, Amrit; Nandi, C.; Patil, A.B.; Khan, K.B.

2013-01-01

Analytical chemistry plays a very important role for nuclear fuel activities be it fuel fabrication, waste management or reprocessing. Nuclear fuels are selected based on the type of reactor. The nuclear fuel has to conform to stringent chemical specifications like boron, cadmium, rare earths, hydrogen, oxygen to metal ratio, total gas, heavy metal content, chlorine and fluorine etc. Selection of technique is very important to evaluate the true specification. This is important particularly when the analyses have to perform inside leak tight enclosure. The present paper describes the details of advanced analytical techniques being developed and used in chemical characterization of nuclear materials specially fuels during their fabrication. Nuclear fuels comprise of fuels based on UO 2 , PUO 2 , ThO 2 and combination of (U+Pu)O 2 , (Th+U)O 2 , (Th+Pu)O 2 , (U+Pu)C, (U+Pu)N etc depending on the type of reactors chosen Viz. Pressurized Heavy water Reactor (PHWR), Boiling Water Reactor (BWR), Fast Breeder Test Reactor and Prototype Fast Breeder Reactor (PFBR). Chemical characterization of these fuels is very important for performance of fuel in the reactor. It provides means to ascertain that the quality of the fabricated fuel conforms to the chemical specifications for the fuel laid down by the designer. The batches of sintered/degassed pellets are subjected to comprehensive chemical quality control for trace constituents, stoichiometry and isotopic composition. Chemical Quality Control of fuel is carried out at different stages of manufacture namely feed materials, sintering, vacuum degassing and fuel element welding. Advanced analytical technique based on titrimetry, spectroscopy, thermogravimetry, XRF and XRD have largely been used for this purpose. Since they have to be handled inside special enclosures, extreme care are being taken during handling. Instruments are being developed/modified for ease of handling and maintenance. The method should be fast to reduce

Algunos aspectos hereditarios y ambientales en casos de fibrosis quística en la ciudad de Cartagena (Colombia

Directory of Open Access Journals (Sweden)

Dacia Malambo

2008-01-01

Full Text Available Objetivos: Describir las características de la transmisión hereditaria de la enfermedad en familias de la ciudad de Cartagena (Colombia y analizar algunos factores medioambientales del núcleo familiar de los pacientes que pudieran influir en la evolución y/o severidad de la patología. Materiales y métodos: Se estudiaron 22 pacientes, distribuidos en 16 familias, del “Programa de atención integral a pacientes con fibrosis quística” de la Universidad de Cartagena. Se recopiló información acerca de las condiciones de vivienda del grupo familiar y se evaluaron aspectos fenotípicos hereditarios, y se construyeron genealogías para esta enfermedad. Resultados: El análisis de pedigríes reveló lo siguiente: en ocho familias (67%, los individuos afectados presentan rasgos caucásicos; en cinco familias (42% se reconoce existencia de ancestros europeos; en dos familias (17% existe consaguinidad. En relación con el aspecto ambiental, se encontró que 33% de las familias estudiadas habitan viviendas en malas condiciones. Conclusiones: Entre las familias de los pacientes con fibrosis quística de la ciudad de Cartagena detectados en este estudio se verifica la transmisión hereditaria autosómica recesiva, se confirma el mestizaje de nuestras poblaciones. La reincidencia de enfermos y la consanguinidad en varias familias denota la falta de asesoramiento genético y el desconocimiento de la evolución de la enfermedad por su grupo familiar. Estos resultados pueden ser el punto de partida de estudios más amplios que sirvan de fundamento para la implementación de políticas tendientes a reducir la frecuencia y severidad de la enfermedad a nivel local y nacional.

The PROSECCO server for chemical shift predictions in ordered and disordered proteins.

Science.gov (United States)

Sanz-Hernández, Máximo; De Simone, Alfonso

2017-11-01

The chemical shifts measured in solution-state and solid-state nuclear magnetic resonance (NMR) are powerful probes of the structure and dynamics of protein molecules. The exploitation of chemical shifts requires methods to correlate these data with the protein structures and sequences. We present here an approach to calculate accurate chemical shifts in both ordered and disordered proteins using exclusively the information contained in their sequences. Our sequence-based approach, protein sequences and chemical shift correlations (PROSECCO), achieves the accuracy of the most advanced structure-based methods in the characterization of chemical shifts of folded proteins and improves the state of the art in the study of disordered proteins. Our analyses revealed fundamental insights on the structural information carried by NMR chemical shifts of structured and unstructured protein states.

Síndrome de Burnout e os aspectos sócio-demográficos em profissionais de enfermagem Síndrome de Burnout y los aspectos sociodemográficos en profesionales de enfermería Burnout Syndrome and the socio-demographic aspects of nursing professionals

Directory of Open Access Journals (Sweden)

Flávia Maria de França

2012-01-01

Full Text Available OBJETIVO: Demonstrar a incidência da Síndrome de Burnout (SB de acordo com os aspectos sociodemográficos dos profissionais de enfermagem que atuam em dois hospitais regionais, no município de Cáceres-MT. MÉTODOS: Estudo de natureza quantitativa, descritivo, com delineamento transversal, realizado com 141 profissionais de enfermagem. Para a coleta de dados, foi utilizado um questionário estruturado com dados para o delineamento sociodemográfico, acrescido do instrumento Maslach Burnout Inventory (MBI. RESULTADOS: Com base na análise das entrevistas dos 141 profissionais, 13 (9,58% apresentaram Síndrome de Burnout,, conforme o MBI, e destes acometidos 7 (53,84% são enfermeiros e 6 (46,16% técnico/auxiliares. Quanto à incidência da SB em função dos aspectos sócios demográficos, o maior número de casos foi verificados no sexo feminino, nos profissionais com menos tempo de formação e nos solteiros. Resultados semelhantes foram encontrados na literatura, relevando as constatações. CONCLUSÃO: Este estudo evidenciou que a presença da SB nos profissionais de enfermagem, revelando assim a necessidade de intervenções em relação às condições de trabalho dos enfermeiros.OBJETIVO: Demostrar la incidencia del Síndrome de Burnout (SB de acuerdo a los aspectos sociodemográficos de los profesionales de enfermería que actúan en dos hospitales regionales, en el municipio de Cáceres-MT. MÉTODOS: Se trata de un estudo de naturaleza cuantitativa, descriptiva, de tipo transversal, realizado con 141 profesionales de enfermería. Para la recolección de los datos, fue utilizado un cuestionario estructurado con datos para el delineamiento sociodemográfico, además del instrumento Maslach Burnout Inventory (MBI. RESULTADOS: Con base en el análisis de las entrevistas de los 141 profesionales, 13 (9,58% presentaron Síndrome de Burnout, conforme el MBI, de los cuales 7 (53,84% son enfermeros y 6 (46,16% técnico/auxiliares. En cuanto a

Physico-chemical characteristics and Heavy metal levels in Drinking ...

African Journals Online (AJOL)

Michael Horsfall

ABSTRAC: This study investigated the physico-chemical characteristics of drinking waters collected from tap, well and sachet in Sokoto metropolis in North Western Nigeria. Conductivity and pH values were determined by standard methods while elemental composition was analysed using X-ray Fluorescence spectroscopy ...

Vibrational spectroscopic analyses of unique yellow feather pigments (spheniscins) in penguins.

Science.gov (United States)

Thomas, Daniel B; McGoverin, Cushla M; McGraw, Kevin J; James, Helen F; Madden, Odile

2013-06-06

Many animals extract, synthesize and refine chemicals for colour display, where a range of compounds and structures can produce a diverse colour palette. Feather colours, for example, span the visible spectrum and mostly result from pigments in five chemical classes (carotenoids, melanins, porphyrins, psittacofulvins and metal oxides). However, the pigment that generates the yellow colour of penguin feathers appears to represent a sixth, poorly characterized class of feather pigments. This pigment class, here termed 'spheniscin', is displayed by half of the living penguin genera; the larger and richer colour displays of the pigment are highly attractive. Using Raman and mid-infrared spectroscopies, we analysed yellow feathers from two penguin species (king penguin, Aptenodytes patagonicus; macaroni penguin, Eudyptes chrysolophus) to further characterize spheniscin pigments. The Raman spectrum of spheniscin is distinct from spectra of other feather pigments and exhibits 17 distinctive spectral bands between 300 and 1700 cm(-1). Spectral bands from the yellow pigment are assigned to aromatically bound carbon atoms, and to skeletal modes in an aromatic, heterocyclic ring. It has been suggested that the penguin pigment is a pterin compound; Raman spectra from yellow penguin feathers are broadly consistent with previously reported pterin spectra, although we have not matched it to any known compound. Raman spectroscopy can provide a rapid and non-destructive method for surveying the distribution of different classes of feather pigments in the avian family tree, and for correlating the chemistry of spheniscin with compounds analysed elsewhere. We suggest that the sixth class of feather pigments may have evolved in a stem-lineage penguin and endowed modern penguins with a costly plumage trait that appears to be chemically unique among birds.

“DESIGNER BABIES”: ASPECTOS BIOÉTICOS DA SELEÇÃO EMBRIONÁRIA NA REPRODUÇÃO HUMANA ASSISTIDA.

OpenAIRE

ANA LETÍCIA VALLADÃO GIANSANTE; SERGIO NOJIRI

2017-01-01

O artigo consiste no estudo das técnicas de reprodução humana e engenharia genética, analisando aspectos éticos e possíveis repercussões jurídicas. Dentre as polêmicas, destaca-se a possibilidade de seleção embrionária visando à escolha de características estéticas - “designer babies” -, bem como a seleção com finalidade terapêutica, além dos critérios para a diferenciação dessas hipóteses. Nesse cenário, ressalta-se a importância da Bioética e do Biodireito frente aos problemas que emergem e...

Sobressalto patológico: aspectos clínicos e eletrencefalográficos Startle seizures: clinical and electroencephalographic studies

Directory of Open Access Journals (Sweden)

Frederico Dahne Kliemann

1967-06-01

Full Text Available Os autores relatam o caso de um paciente apresentando crises de sobressalto provocadas por estímulos auditivos, sensitivos e visuais, sem crises epilépticas espontâneas nem retardo psicomotor. Estudam os aspectos clínicos e eletrencefalográficos e revisam a situação da entidade entre as assim chamadas epilepsias reflexas.The case of a patient presenting startle seizures provoked by acoustic, sensitive and visual stimuli who did not present spontaneous epileptic seizures and had no psychomotor retard is reported. The clinical and electroencephalographic aspects with special mention to the finding of exaggerated evoked potentials in the vertex are discussed. The situation of the disease among reflex epilepsies is revised.

Temperature buffer test. Hydro-mechanical and chemical/ mineralogical characterizations

International Nuclear Information System (INIS)

Aakesson, Mattias; Olsson, Siv; Dueck, Ann; Nilsson, Ulf; Karnland, Ola; Kiviranta, Leena; Kumpulainen, Sirpa; Linden, Johan

2012-01-01

TEM), iron oxidation state (Moessbauer spectroscopy). The retention tests, the CEC-determinations, the chemical analyses by ICP, and the mineralogical analyses by XRD and FTIR were performed on bulk samples as well as on a Na-converted fine fraction ( 2+ had increased slightly, but the five component fit didn't support this observation. Hence, the increase in the amount of iron observed with chemical analyses was probably too small to be detected reliably with Mossbauer spectroscopy

Can sonography define the chemical composition of gall stones

International Nuclear Information System (INIS)

Frentzel-Beyme, B.; Faehndrich, R.; Arnan-Thiele, B.

1983-01-01

Eight sonographic patterns caused by gall stones are described. In an attempt to explain these different appearances, 62 stones were analysed chemically and physically. The chemical composition of the stones did not correlate with their sonographic pattern. Cholesterol stones cannot be recognised as such by sonography. The formation of an acoustic shadow depends largely on the position of the stone within the acoustic beam. It therefore follows that the examination must be done by keeping the focal plane of the transducer in proper relationship to the stone. (orig.) [de

Using vegetable oils and animal fats in Diesel Engines: chemical analyses and engine texts

International Nuclear Information System (INIS)

Marmino, I.; Verhelst, S.; Sierens, R.

2008-01-01

In this work, some vegetable oils (rapeseed oil, palm oil) and animal fat were tested in a Diesel engine at a range of engine spreads and torque settings, after preheating at 70 0 C. Engine performance, fuel consumption and NOx, unburnt hydrocarbons and soot emissions have been recorded. The results have been compared to those obtained with diesel fuel in the same test conditions. The oils and fats were also analyzed for their physical and chemical properties (viscosity, composition, unsaturation, heating value). NOx emissions were found to be lower for the oils than for the diesel fuel. This, combined with higher HC emissions, can probably be explained through less effective atomization due to the higher viscosity of the oils and fat. On the other hand, soot emissions were found to decrease. [it

Odor and odorous chemical emissions from dairy and swine facilities: Part 5-Simultaneous chemical and sensory analysis with Gas Chromatography - Mass Spectrometry - Olfactometry

Science.gov (United States)

Simultaneous chemical and sensory analyses using gas chromatography-mass spectrometry-olfactometry (GC-MS-O) for air samples collected at barn exhaust fans were used for quantification and ranking of odor impact of target odorous gases. Fifteen target odorous VOCs (odorants) were selected. Air sampl...

Mechanical and chemical analyses across dental porcelain fused to CP titanium or Ti6Al4V

International Nuclear Information System (INIS)

Souza, Júlio C.M.; Henriques, Bruno; Ariza, Edith; Martinelli, Antonio E.; Nascimento, Rubens M.; Silva, Filipe S.; Rocha, Luís A.; Celis, Jean-Pierre

2014-01-01

The aim of this study was to evaluate the evolution of mechanical properties and chemical variation across veneering dental porcelain fused to different titanium-based substrates. Test samples were synthesized by fusing dental feldspar-based porcelain onto commercially pure titanium grade II or Ti6Al4V alloy. Samples were cross-sectioned at angles of 10 and 90° to the interface plane. Afterwards, nanoindentation tests and Scanning Electron Microscopy (SEM) imaging coupled to an Energy Dispersive Spectroscopy (EDS) system were carried out across interfaces extending from the metal towards the porcelain area. Elemental diffusion profiles across the porcelain-to-metal interfaces were also obtained by EDS analysis. The mismatch in mechanical properties found in porcelain-to-Ti6Al4V interfaces was lower than that of porcelain-to-CP titanium. Cracking was noticed at low-thickness veneering dental porcelain regions after the nanoindentation tests of samples cross-sectioned at low angles to the interface plane. A wide reaction zone between titanium and porcelain as well as higher incidence of defects was noticed at the porcelain-to-CP titanium interfaces. This study confirmed Ti6Al4V as an improved alternative to CP-titanium as it showed to establish a better interface with the veneering dental porcelain considering the slight chemical interaction and the lower mechanical properties mismatch. The elastic modulus of porcelain-to-Ti6Al4V samples showed to be less sensitive to porcelain thickness variations. - Highlights: • This study reveals mechanical and chemical behaviors across porcelain/titanium interfaces. • Cracks were noticed after nanoindentation on thin porcelain layers. • Ti6Al4V/porcelain showed a better mechanical behavior than that at CP-Ti/porcelain

Toxoplasmosis congénita: aspectos clínicos y epidemiológicos de la infección durante el embarazo

OpenAIRE

Fernando Rosso; Alejandro Agudelo; Ángela Isaza; José Gilberto Montoya

2007-01-01

Se presenta una revisión actualizada sobre la toxoplasmosis durante el embarazo y de su consecuencia la toxoplasmosis congénita. Se pretende ilustrar a los profesionales de la salud con los diferentes aspectos tanto epidemiológicos como clínicos concernientes a esta enfermedad. Se revisan conceptos actuales de la parasitología y de la epidemiología de la transmisión materno-fetal, así como la presentación clínica de la infección perinatal. Se discuten nuevos adelantos en el diagnóstico y su i...

Aspectos culturais no ensino de alemao como língua estrangeira: uma análise de livros ditáticos

OpenAIRE

Amato, Laura Janaina Dias

2016-01-01

Dissertação apresentada como requisito parcial à obtenção do grau de Mestre, do Curso de Pós-Graduação em Estudos Lingüísticos, Área de concentração: Teorias de Aquisição de Segunda Língua, Setor de Ciências humanas, Letras e Artes, Universidade Federal do Paraná. Orientadora: Profa. Dra. Gertrud Friedrich Frahm. 2005 O presente trabalho de pesquisa objetiva desenvolver uma análise sobre dos aspectos culturais dos livros didáticos produzidos na Alemanha, após a elaboração do novo Quadro...

Conocimientos de los adolescentes sobre aspectos de la sexualidad

Directory of Open Access Journals (Sweden)

Ileana García Imia

2002-12-01

Full Text Available Se realizó un estudio descriptivo retrospectivo, de corte transversal, en el área del Policlínico Docente "Wilfredo Pérez Pérez" del municipio San Miguel del Padrón, de Ciudad de La Habana, con el fin de explorar los conocimientos sobre algunos aspectos de la sexualidad, en un grupo de 100 adolescentes en edades entre 10 y 19 años y de uno y otro sexos, en el año 2001. Se apreció un elevado tanto por ciento de jóvenes que tenían conocimientos sobre la anatomía del aparato genital, la mejor edad para tener hijos y la anticoncepción. En general, no tenían conocimientos de todas las enfermedades de transmisión sexual, no así el método más eficaz para evitarlas. El grupo de edad de mayor relevancia lo constituyó el de 10 a 13 años por sus escasos conocimientos sobre sexualidad.A retrospective, descriptive and crosswise study was made in the health areas of "Wilfredo Pérez Pérez" Teaching Polyclinics in San Miguel del Padrón municipality, Havana City province, with the objective of exploring what a group of 100 adolescents aged 10-19 years of both sexes knows about sexuality in the year 2001. A high percentage of them had knowledge about anatomy of the genital system, the most suitable age for having children and contraception. In general, they did not know all the sexually-transmitted diseases but they did know the most efficient method to prevent them. The most relevant age group was 10-13 years old because of their poor knowledge about sexuality.

Low-Cost Chemical-Responsive Adhesive Sensing Chips.

Science.gov (United States)

Tan, Weirui; Zhang, Liyuan; Shen, Wei

2017-12-06

Chemical-responsive adhesive sensing chip is a new low-cost analytical platform that uses adhesive tape loaded with indicator reagents to detect or quantify the target analytes by directly sticking the tape to the samples of interest. The chemical-responsive adhesive sensing chips can be used with paper to analyze aqueous samples; they can also be used to detect and quantify solid, particulate, and powder analytes. The colorimetric indicators become immediately visible as the contact between the functionalized adhesives and target samples is made. The chemical-responsive adhesive sensing chip expands the capability of paper-based analytical devices to analyze solid, particulate, or powder materials via one-step operation. It is also a simpler alternative way, to the covalent chemical modification of paper, to eliminate indicator leaching from the dipstick-style paper sensors. Chemical-responsive adhesive chips can display analytical results in the form of colorimetric dot patterns, symbols, and texts, enabling clear understanding of assay results by even nonprofessional users. In this work, we demonstrate the analyses of heavy metal salts in silica powder matrix, heavy metal ions in water, and bovine serum albumin in an aqueous solution. The detection is one-step, specific, sensitive, and easy-to-operate.

Consumo responsável: um passo além do aspecto ambiental Responsible consumption: one step beyond the environmental aspect

Directory of Open Access Journals (Sweden)

Abdala Mohamed Saleh

2012-06-01

Full Text Available Este artigo apresenta um modelo, de cunho didático e dirigido prioritariamente aos profissionais de educação, que leva em conta os diversos aspectos que devem caracterizar um consumo como responsável. Além do usual aspecto Meio Ambiente, há outros, como a Publicidade, a Saúde e a Segurança, o Direito e a Ética e que foram aqui sintetizados a partir da coleção lançada conjuntamente pelo IDEC (Instituto de Defesa do Consumidor e pelo Inmetro (Instituto Nacional de Metrologia, Normalização e Qualidade Industrial. Essa coleção é dirigida aos professores e alunos do terceiro e quarto ciclos do ensino fundamental e foi elaborada no contexto dos temas transversais apresentados pelos Parâmetros Curriculares Nacionais (PCNs. Colocando-se no papel de consumidor responsável e utilizando-se do referido modelo, inspirado na coleção do IDEC e do Inmetro, pretende-se analisar um caso-exemplo, Ambev, considerada a maior indústria cervejeira da América Latina e "Referência mundial na gestão da água". Por meio desse exemplo, procura-se mostrar que o "respeito à natureza", no caso, o elemento água, é um parâmetro necessário, mas insuficiente para caracterizar um consumo como responsável e que os demais aspectos apontados acima devem ser considerados.This paper presents a model of didactic feature and directed primarily to professional education, which takes into account the various aspects that should characterize a responsible consumption. Besides the usual environmental aspect, there are others aspects such as advertising, health and safety, and Law and ethics, which have been summarized from the collection launched jointly by the IDEC (Institute of Consumer Protection and Inmetro (National Institute of Metrology, Standardization and Industrial Quality. This collection is addressed to teachers and students of the third and fourth cycles of elementary school and was elaborated in the context of cross-cutting themes presented by the

Aspectos históricos da endocardite infecciosa Historical aspects of infective endocarditis

Directory of Open Access Journals (Sweden)

Max Grinberg

2011-04-01

Full Text Available A endocardite infecciosa era fatal até há três gerações. A evolução temporal do conhecimento da doença possibilitou avanços nas técnicas diagnósticas, especialmente na ecocardiografia, a possibilidade de se realizar a cirurgia cardíaca, mesmo com o processo infeccioso em atividade, e novas recomendações de profilaxia por antibióticos antes dos procedimentos de intervenção. Hoje a endocardite infecciosa é curável. Nesta revisão são abordados os aspectos históricos da endocardite, desde as observações de Osler, no século XIX, até a transformação de doença "clinicamente possível" em "clinicamente definida".Infective endocarditis was a fatal disease three generations ago. Temporal evolution of knowledge made possible important advances in diagnostic techniques, especially in echocardiography, the possibility of cardiac surgery during the active infectious process and new guidelines for antibiotic prophylaxis before interventional procedures. Nowadays, infective endocarditis is curable. In this review, we describe historical aspects of endocarditis, from Osler´s observations in the 19th century to the change from a "clinically possible" to a "clinically defined" disease.

ASPECTOS COMPORTAMENTAIS DE Hedypathes betulinus KLUG (1825 (COLEOPTERA: CERAMBYCIDAE EM ERVA-MATE

Directory of Open Access Journals (Sweden)

Márcia d’Avila

2005-09-01

Full Text Available O objetivo deste trabalho foi estudar o comportamento de Hedypathes betulinus em erva-mate. O estudo foi conduzido em ervais homogêneos, com 8 anos de idade, espaçamento de 1,5 m x 2,0 m e 15 ha e 20 ha respectivamente nos municípios de Ilópolis (RS e Catanduvas (SC. As observações foram realizadas de hora em hora durante 6 dias, totalizando 144 observações em Ilópolis (RS e 3 dias, totalizando 72 observações em Catanduvas (SC em fevereiro e março de 2001 respectivamente. Os fatores ambientais temperatura (°C, umidade relativa do ar (%, velocidade do vento (m/s e intensidade luminosa (Klux foram medidos por meio de um termohigrógrafo, um anemômetro e um luxímetro. Os aspectos comportamentais observados foram: cópula, postura, ato alimentar, macho guardando fêmea, inseto parado sozinho e inseto em movimento. Postura e alimentação foram os únicos comportamentos afetados em determinados períodos do dia e condições ambientais, para os demais comportamentos, H. betulinus não apresenta preferência para realizá-los, ocorrendo de forma variada.

Limitación del esfuerzo terapéutico: aspectos religiosos y culturales

Directory of Open Access Journals (Sweden)

Gilberto de Jesús Betancourt Betancourt

Full Text Available La comprensión de la muerte varía según la época, la cultura, la religión y la edad. Con anterioridad al desarrollo que la ciencia médica ha experimentado desde finales del siglo XIX, en la mayoría de las culturas y religiones había una aceptación de la muerte y se consideraba como parte del ciclo vital de la persona donde se trascendía a una forma celestial y puramente sobrenatural. Los avances científicos de la medicina han venido a cambiar esta situación. La muerte se empezó a ver como un enemigo y dio comienzo a una lucha encarnizada entre ambas. El concepto de "muerte natural" se sustituyó por el de "muerte intervenida," dando origen a numerosas cuestiones relacionadas con la toma de decisiones y actuaciones a realizar en pacientes ingresados y en situación terminal. En este trabajo se realiza una reflexión teórica que tiene como objetivo el análisis bioético acerca de las diferencias entre los aspectos religiosos y culturales relacionados con la práctica de la limitación del esfuerzo terapéutico.

Some physico-chemical and biological characteristics of soil and ...

African Journals Online (AJOL)

Environmental conditions that influence biocorrosion in the Niger Delta area of Nigeria are investigated experimentally by analysing the physico-chemical and biological characteristics of four (4) soil samples and water samples taken from ten (10) selected river bodies in the region. Measured properties of the water ...

Physical, chemical and sensorial effects of gamma irradiation and cooking on soybean cultivars (Glycine max) with and without lipoxygenase;Efeitos da irradiacao gama e da coccao sobre aspectos fisicos, quimicos e sensoriais de cultivares de soja (Glycine max) com e sem lipoxigenase

Energy Technology Data Exchange (ETDEWEB)

Biscaro, Luciana Marino e

2009-07-01

The soybean is a vegetable with high nutritional value, mainly due to its high protein content. Among the culture of grains, the soy beam is the most important in Brazil, what represents a greater incentive for the consumption of this food. However, a great claim of occidental consumer is its characteristic odor and flavor, known as beany flavor, which is provided by the action of lipoxygenase enzyme. The catalytic action exerted by this type of isoenzyme on polyunsaturated fatty acids, linolenic and linoleic acid of the soy grains, is one of the main factors responsible for the appearance of the carbonyl compounds, which cause the unpleasant flavor in grains. To enhance the organoleptic characteristics of soybeans, researchers have developed new cultivars, without the presence of lipoxygenase. The objective of this study was to evaluate physical, chemical and sensorial differences between the two soy cultivar, with and without lipoxygenases (cultivars BRS 232 and BRS 257, of EMBRAPA, respectively) and to analyze the possible changes promoted by different radiation doses (0, 4 and 8 kGy) in raw and cooked soybean grains. The physical analyses were: time of cooking and hydration of the grains. The chemical analyses were: centesimal composition, protein digestibility, anti nutritional factors, isoflavone content and antioxidant capacity (DPPH and ABTS). The sensory aspects were determined by sensorial analysis performed by applying analytical methods of differentiation for selection of panelists, and descriptive method to determine the quality of the soybean. At the end, factorial statistical analysis was performed 3x2x2 (irradiation doses X cultivars x treatment) for analysis, comparison and discussion of the obtained results. The results showed differences in physical analyses with the irradiation and between the two cultivars. Besides, the cultivars presented differences in the centesimal composition, digestibility fenolic content, isoflavone content and trypsin

Toxicologia do praguicida aldicarb ("chumbinho": aspectos gerais, clínicos e terapêuticos em cães e gatos Aldicarb toxicology: general, clinic and therapeutic features in dogs and cats

Directory of Open Access Journals (Sweden)

Fabiana Galtarossa Xavier

2007-08-01

Full Text Available O aldicarb (Temik®, um agente anticolinesterásico carbamato vulgarmente conhecido como "chumbinho", é considerado um dos praguicidas mais tóxicos disponíveis comercialmente. No Brasil, embora seja registrado para uso agrícola exclusivo, tem sido freqüentemente apontado como o responsável por diversos casos de intoxicação em seres humanos e em animais. Desta forma, o presente estudo faz uma abordagem da toxicologia deste agente, enfocando as propriedades químicas, a toxicocinética, a toxicodinâmica, o diagnóstico e os aspectos clínicos e terapêuticos da intoxicação em cães e gatos.Aldicarb (Temik®, an anticholinesterase inhibitor of the carbamate group known as ‘chumbinho’, is one of the most toxic of registered pesticides, and has its use restricted to agriculture in Brazil. In spite of it, aldicarb is being very often involved in severe intoxication in humans and animals. It is largely and illegally sold as rodenticide and often used in baits for intentional poisoning of companion animals. Because of this the aldicarb toxicology was reviewed empathizing its chemical properties, toxicokinetic, toxicodynamic, diagnostic and the clinical and therapeutics aspects in dogs and cats.

Applicable safety-related design and operations considerations from the oil and chemical industries

International Nuclear Information System (INIS)

Mulvihill, R.J.; Deshotels, R.L.; Master, C.A.

1987-01-01

Fluor Daniel has conducted several hazards and risk analyses on petroleum and chemical facilities. These analyses included qualitative hazards and operability (HAZOP) studies, preliminary hazards analyses, and qualitative fault-tree analysis as well as quantitative event-tree/fault-tree risk analysis. Several design-related problem areas were uncovered as a result of these analyses as well as deficiencies in operations and maintenance. Design deficiency areas include potential common-mode failures associated with redundant functions sharing a common distributed digital control (DDC) logic circuit board and failures in pressure relief systems. Many of the design weaknesses and potential operator errors discussed have a direct counterpart in nuclear fuel processing plants and nuclear power reactors. Counterparts that are discussed are common cause/common mode failures in control systems and failures in pressure relief systems. Overpressurization of piping and vessels resulting in rupture is discussed. Mitigating design features and operations procedures that have been implemented in the chemical process industry are described and their applicability to the nuclear industry is discussed

Trastornos generalizados del desarrollo: Aspectos clínicos y genéticos Pervasive developmental disorders: Clinical and genetics aspects

Directory of Open Access Journals (Sweden)

Víctor Ruggieri

2007-01-01

Full Text Available Los Trastornos Generalizados del Desarrollo se expresan con compromiso en la socialización, trastorno en el desarrollo del lenguaje (verbal y no verbal e intereses restringidos con conductas repetitivas. La frecuencia estimada en la población general es de 27.5/10.000. En nuestro trabajo analizamos los aspectos clínicos y genéticos de los TGD: Autismo, Síndrome de Asperger, TGD no Especificado, Síndrome de Rett y Trastorno desintegrativo de la niñez. Desde el punto de vista clínico jerarquizamos los aspectos conductuales para su reconocimiento. En los aspectos genéticos puntualizamos diversas entidades con las que se asocian consistentemente estos trastornos, denominados cuadros sindrómicos, (aproximadamente el 20% de los casos y las bases genéticas actualmente propuestas para el 80% restante o formas no sindrómicas. El reconocimiento temprano de estos trastornos del desarrollo y el diagnóstico de una entidad específica asociada permiten un temprano y adecuado abordaje terapéutico, un correcto asesoramiento genético y un control evolutivo específico previendo posibles complicaciones relacionadas a la entidad de base. Finalmente, si bien las bases genéticas del autismo no están identificadas se han propuesto diversos genes candidatos ubicados en los cromosomas: 15q, 2q, 17q, 7q, 12q, y los relacionados al X, entre otros, los que son analizados en este trabajo y permitirán en un futuro cercano comprender mejor estos trastornos.Pervasive developmental disorders (PDD encompass a heterogeneous group of children with deficits of verbal and non-verbal language, social communication, and with a restricted repertoire of activities or repetitive behaviours. The frequency in general population is considered 27.5/10,000. In this study, we analyzed the clinical and genetic aspects of Autism, Asperger Syndrome, PDD Not Otherwise Specified, Rett Syndrome and Childhood Disintegrative Disorder. We analyzed clinical, behavioural and

PRINCIPALES ASPECTOS MORFOMÉTRICOS DE LA CIÉNAGA DE CACHIMBERO, SANTANDER – COLOMBIA.

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BENJUMEA HOYOS CARLOS AUGUSTO

2010-05-01

Full Text Available En este artículo se presenta el mapa batimétrico y algunos aspectos morfométricos relevantes de la ciénaga de Cachimbero. Es un sistema tropical somero con profundidad media de 1,83 m. La forma de esta ciénaga, basados en la curva hipsográfica relativa del área frente a la profundidad es cóncava (C. La ciénaga posee altos valores de los parámetros índice de desarrollo del volumen (Vd y la relación de profundidad (cociente profundidad media / profundidad máxima, Dmed / Dmáx, esto refleja su morfometría con un fondo relativamente plano y pendientes pronunciadas desde las orillas hacia el fondo. La ciénaga es de tipo alargado, característica que es corroborada con el índice de desarrollo del perímetro o de la línea costera (F, el cual es superior a la unidad. El valor de este parámetro indica la gran influencia de los factores externos sobre la dinámica de la ciénaga.

ASPECTOS DA PRÁTICA MUSICOTERAPÊUTICA: CONTEXTO SOCIAL E COMUNITÁRIO EM PERSPECTIVA

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Andressa Dias Arndt

2016-08-01

Full Text Available Resumo Este artigo propõe uma discussão sobre os pressupostos que fundamentam a prática da Musicoterapia, especificamente quando esta se identifica como uma ação de base social e comunitária. A partir de uma localização histórica, desenvolvem-se reflexões críticas acerca dos principais conceitos que balizam a práxis musicoterapêutica em contexto social e comunitário. A discussão apresentou o termo musicoterapia social e comunitária como uma tentativa de abranger fundamentos da psicologia, sobretudo em uma vertente crítica e sócio-histórica, que abordam uma prática centrada nas relações humanas, na grupalidade e na ação democrática. Temas como lugar, espaço e ação musicoterapêutica foram discutidos. Concluiu-se que tal prática pretende a modificação da realidade social por meio do convívio mediado da criação de sonoridades, em um processo ativo fundamentado na cultura e em aspectos da vivência cotidiana.

Chemical characterisation of zircon-cadmium sulfoselenide ceramic pigments

International Nuclear Information System (INIS)

Gazulla Barreda, M. F.; Rodrigo Edo, M.; Blasco Roca, E.; Orduna Cordero, M.

2013-01-01

The present paper addresses the development of a methodology that allows the complete chemical characterisation of zircon cadmium sulfoselenide ceramic pigments including minor and major elements. To develop the methodology, five zircon-cadmium sulfoselenide pigments with different hues were selected, studying the different measurement process steps, from sample preparation to the optimisation of the measurement of the different components of the pigments by spectroscopic techniques (WD-XRF and elemental analysis by combustion and IR detection). The chemical characterisation method developed was validated with synthetic standards prepared from the mixture of certified reference materials and pure oxides because no certified referenced materials of this type of pigments were commercially available. The developed method can be used for a complete chemical characterization of zircon-cadmium sulfoselenide ceramic pigments with a very low uncertainty for all the elements analysed. (Author)

Acidentes por lepidópteros (larvas e adultos de mariposas): estudo dos aspectos epidemiológicos, clínicos e terapêuticos

OpenAIRE

Cardoso,Alberto Eduardo Cox; Haddad Junior,Vidal

2005-01-01

Os autores apresentam e discutem aspectos dos acidentes causados por larvas de lepidópteros (mariposas), enfatizando as manifestações dermatológicas e a dor intensa que caracterizam estes agravos. Além disso, são apresentadas larvas de mariposas que causam manifestações extracutâneas, tais como severos distúrbios de coagulação e artropatias anquilosantes, e ainda dermatites provocadas por insetos adultos. Os principais grupos de lepidópteros causadores de acidentes em humanos são demonstrados...

Revisión de los aspectos para la evaluación de la nutrición y alimentación en programas de salud de hato de ganado lechero I: evaluación del hato

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Carlos Alpízar Solís

2017-06-01

Full Text Available La alimentación desempeña un rol preponderante en el rendimiento de las vacas lecheras y  busca, fundamentalmente, llenar los requerimientos nutricionales de los animales, garantizar la salud y función digestivas, así como optimizar el aprovechamiento de los recursos disponibles y las raciones, para obtener la más óptima relación beneficio-costo por alimentación. Por tanto, las prácticas de alimentación empleadas deben orientarse a cumplir alguno o todos los aspectos anteriores. Esta revisión tiene como objetivo orientar sobre los principales aspectos de la alimentación del ganado bovino que deben considerarse, como mínimo, en los programas para la atención veterinaria de fincas dedicadas a la producción de leche bovina y apoyar las labores del veterinario. Además, busca la integración de diferentes aspectos médicos y de manejo, especialmente la alimentación y de esa manera, motivar a los veterinarios encargados de atender las fincas lecheras, a desarrollar y emplear las mejores herramientas o métodos de abordaje en las fincas. Se describen aspectos que se pueden medir y evaluar en la práctica, además de ser  utilizados como referencia para el control de la alimentación, el estado nutricional, la salud ruminal, el desempeño de los animales y el balance de las raciones. Los aspectos de la nutrición y alimentación que se incluyen en el cuerpo del texto son el consumo de alimento, la condición corporal, el balance energético, la producción láctea, el metabolismo de nitrógeno y el funcionamiento y salud digestivas. Finalmente, se concluye que el manejo alimentario en la finca debe ir apoyado por el análisis integral de los datos obtenidos en la evaluación del sistema de alimentación, en conjunto con otros como la producción y reproducción; además, debe involucrarse a todo el equipo de trabajo en la evaluación de los resultados. Los esfuerzos deben orientarse a obtener las metas propuestas inicialmente para el

The use of microbial and chemical analyses to characterize the variations in fouling profile of seawater reverse osmosis (SWRO) membrane

KAUST Repository

Manes, Carmem Lara De O

2013-01-01

Biofouling of reverse osmosis (RO) membranes is one of the most common problems in desalinations plants reducing the efficiency of the water production process. The characterization of bacterial community composition from fouling layers as well as detailed analysis of surrounding chemical environment might reveal process specific bacterial groups/species that are involved in RO biofouling. In this study, advanced organics analytic methods (elemental analysis, FTIR, and ICP-OES) were combined with high-throughput 16S rRNA (pyro) sequencing to assess in parallel, the chemical properties and the active microbial community composition of SWRO membranes from a pilot desalination plant (MFT, Tarragona) in February 2011 and July 2011. Prefiltered ultrafiltration. waters fed SWRO membranes during third and fifth month of operation, respectively. SWRO samples were taken from three modules at different positions (first, fourth, and sixth) in order to investigate the spatial changes in fouling layers\\' chemical and microbiological composition. The overall assessment of chemical parameters revealed that fouling layers were mainly composed by bio and organic material (proteins and lipids). Ca and Fe were found to be the most abundant elements having an increasing concentration gradient according to the module position. Bacterial community composition of SWRO membranes is mostly represented by the Gammaproteobacteria class with interesting differences in genera/species spatial and temporal distribution. This preliminary result suggests that pretreatments and/or operational conditions might have selected different bacterial groups more adapted to colonize SWRO membranes. © 2013 Desalination Publications.

MONITORIZACIÓN TERAPÉUTICA DE FÁRMACOS Y ASPECTOS PRÁCTICOS DE FARMACOCINÉTICA

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Q.F. Leslie Escobar, PhD

2016-09-01

Full Text Available La monitorización terapéutica de fármacos (MTF es una herramienta con demostrada efectividad para mejorar los resultados clínicos de los pacientes, minimizando la toxicidad y maximizando la efectividad de los tratamientos. Además de usarla en aquellos fármacos con estrecho margen terapéutico o con perfil de efectos adversos dosis-dependientes, podría favorecer en la individualización de los tratamientos. Reconociendo en qué etapa de la farmacocinética (ADME: absorción, distribución, metabolismo, excreción el paciente tiene alternaciones y cuáles son los parámetros farmacocionéticos individuales (volumen de distribución, clearance, vida media, área bajo la curva, etc., sería posible interpretar las concentraciones plasmáticas medidas para conseguir la respuesta terapéutica esperada con una dosis específica. El presente artículo revisa los aspectos necesarios a considerar antes de utilizar la MTF en nuestros centros.

Aspectos básicos de la nutrición enteral en el paciente quemado

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Carlos Manuel Collado Hernández

Full Text Available El tratamiento nutricional es un elemento importante en la terapia combinada de las lesiones por quemaduras severas, permitiendo un control del catabolismo en el paciente. En los pacientes quemados el hipermetabolismo estimula el aumento de las necesidades proteico calóricas, la influencia del inicio precoz de la nutrición apoya la estabilidad hemodinámica. El objetivo de esta revisión es describir los aspectos esenciales y actuales de la nutrición enteral en el paciente gran quemado como su concepto, vías de administración, importancia de su aplicación, fórmulas principales para el cálculo proteico energético, tratamiento con macronutrientes y micronutrientes para garantizar una nutrición adecuada y acorde a las necesidades. La nutrición enteral continua siendo la vía más importante y segura en el paciente gran quemado para la administración de macronutrientes y micronutrientes necesarios en los procesos metabólicos que garantizan la cicatrización y curación de los mismos.

Aspectos farmacológicos de la terapéutica del paciente asmático

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Alicia Zapata Martínez

1998-12-01

Full Text Available El asma bronquial es un importante problema de salud en la atención primaria. Se sabe que un tratamiento correcto de la enfermedad contribuye a mejorar la calidad de vida de estos pacientes. Se revisan los principales aspectos farmacológicos (acciones, indicaciones, efectos adversos, vía de administración y dosis de los 2 grupos de medicamentos más empleados en la terapéutica de la enfermedad que son: los broncodilatadores (salbutamol, teofilina, bromuro de ipratropio y los antiinflamatorios (cromoglicato de sodio y glucocorticoidesBronchial asthma is an important health problem in primary health care. It is known that an adequate treatment of the disease helps to improve the quality of life of these patients. The main pharmacological aspects (actions, indications, side effects, administration and dosage of the 2 most used groups of drugs in the therapeutics of the disease that are: the bronchodilators (salbutamol, theophylline, and ipratropium bromide, and the antiinflammatory drugs (disodium cromoglycate and glucocorticoids are reviewed.

Aspectos histológicos y moleculares del tendón como matriz extracelular extramuscular

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Doris Rosero

2016-06-01

Full Text Available Los tendones corresponden a la matriz extracelular intramuscular junto con las fascias ylas aponeurosis, los cuales se encuentran constantemente sometidos a cargas mecánicas ytensión, lo que genera modificaciones en las características que constituyen el tejido conectivoque los conforman. En estos conceptos, se encuentra el fundamento de alteracionescomo las rupturas tendinosas y las tendinopatías, por lo cual en esta revisión se describieronlos aspectos relacionados con el desarrollo y, la organización de la matriz extracelular,con el fin de ser aplicados a las perspectivas de tratamiento en las que actualmente se estáinvestigando, no sólo desde el punto de vista biomédico, sino clínico, dada su importanciapara el desempeño cotidiano de los seres humanos. Los mecanismos de lesión, reparacióny regeneración, así como los relacionados con la biología mecánica, son los que despiertanel interés de quienes se ocupan de la investigación en esta área.

Estimated inventory of chemicals added to underground waste tanks, 1944--1975

International Nuclear Information System (INIS)

Allen, G.K.

1976-03-01

The five major chemical processes, the Bismuth Phosphate process, the Uranium Recovery process, the Redox process, the Purex process, and the Waste Fractionization process have each contributed to give the total Hanford waste chemicals. Each of these processes is studied to determine the total estimated chemicals stored in underground waste tanks. The chemical contents are derived mainly from flowsheet compositions and recorded waste volumes sent to underground storage. The major components and amounts of Hanford waste are sodium hydroxide, 230 million gram-moles (20 million pounds), sodium nitrate, 1400 million gram-moles (270 million pounds), sodium nitrite, 220 million gram-moles (34 million pounds), sodium aluminate, 400 million gram-moles (72 million pounds), and sodium phosphate, 87 million gram-moles (31 million pounds). Chemical analyses of the sludge and salt cake samples are tabulated to determine the chemical characteristics of the solids. A relative chemical toxicity of the Hanford underground waste tank chemicals is developed from maximum permissible chemical concentrations in air and water. The most toxic chemicals are assumed to be sodium phosphate--35%, sodium aluminate--28%, and chromium hydroxide--19%. If air standards set toxicity limits, the most toxic chemicals are bismuth--41%, chromium hydroxide--23%, and fluoride--10%

Aspectos metodologicos de la medición en el sitio de ocurrencia de lesiones por accidentes de tráfico Methodological aspects of measuring injuries from traffic accidents at the site of occurrence

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Martha C. Híjar-Medina

1997-02-01

Full Text Available Os acidentes de trânsito de veículos a motor representam problema de saúde pública, em nível mundial. No México, a pesquisa, nesse campo, é limitada e a metodologia para seu estudo é pouco desenvolvida. Na literatura científica internacional são escassos os artigos que discutem os aspectos metodológicos de pesquisa nesse campo. Assim, realizou-se estudo com o objetivo de apresentar alguns aspectos metodológicos úteis para os interessados em pesquisar lesões por acidentes de trânsito. Foram discutidos aspectos sobre como medir, no local de ocorrência, as variáveis básicas para o estudo dessas lesões, tais como: se o motorista sofreu ou não lesões, uso de cinto de segurança, velocidade e consumo de álcool.Los accidentes de tráfico de vehículos de motor, representan un problema de Salud Pública a nivel mundial. En México la investigación en este campo es limitada y la metodología para su estudio está poco desarrollada. Por otro lado, son relativamente escasos los artículos publicados en revistas científicas internacionales que abunden, en la discusión sobre aspectos metodológicos de la investigación. El objetivo del trabajo es el presentar algunas consideraciones metodológicas que pueden ser de utilidad para los investigadores interesados en el tema de las lesiones por accidentes de tráfico. Se discuten aspectos que deben tenerse en cuenta cuando se miden en el sitio de ocurrencia algunas variables fundamentales para el estudio de las lesiones, como son: Si el conductor está o no lesionado, uso de cinturón de seguridad, velocidad y consumo de alcohol.Traffic accidents are a well-known public health problem worldwide. In Mexico research into risk factors for motor involving vehicles accidents and their consequences has recentlly been taken into account. The relevant literature does not normally describe the methodological aspects involved in the collection of primary data, since most studies have used secondary

Optimal control for chemical engineers

CERN Document Server

Upreti, Simant Ranjan

2013-01-01

Optimal Control for Chemical Engineers gives a detailed treatment of optimal control theory that enables readers to formulate and solve optimal control problems. With a strong emphasis on problem solving, the book provides all the necessary mathematical analyses and derivations of important results, including multiplier theorems and Pontryagin's principle.The text begins by introducing various examples of optimal control, such as batch distillation and chemotherapy, and the basic concepts of optimal control, including functionals and differentials. It then analyzes the notion of optimality, de

Chemical analyses of waters from geysers, hot springs, and pools in Yellowstone National Park, Wyoming from 1974 to 1978

Energy Technology Data Exchange (ETDEWEB)

Thompson, J.M.; Yadav, S.

1979-01-01

Waters from geysers, hot springs, and pools of Yellowstone National Park have been analyzed. We report 422 complete major ion analyses from 330 different locations of geysers, hot springs, and pools, collected from 1974 to 1978. Many of the analyses from Upper, Midway, Lower, and Norris Geyser Basin are recollections of features previously reported.

Implementation of the NMR CHEmical Shift Covariance Analysis (CHESCA): A Chemical Biologist's Approach to Allostery.

Science.gov (United States)

Boulton, Stephen; Selvaratnam, Rajeevan; Ahmed, Rashik; Melacini, Giuseppe

2018-01-01

Mapping allosteric sites is emerging as one of the central challenges in physiology, pathology, and pharmacology. Nuclear Magnetic Resonance (NMR) spectroscopy is ideally suited to map allosteric sites, given its ability to sense at atomic resolution the dynamics underlying allostery. Here, we focus specifically on the NMR CHEmical Shift Covariance Analysis (CHESCA), in which allosteric systems are interrogated through a targeted library of perturbations (e.g., mutations and/or analogs of the allosteric effector ligand). The atomic resolution readout for the response to such perturbation library is provided by NMR chemical shifts. These are then subject to statistical correlation and covariance analyses resulting in clusters of allosterically coupled residues that exhibit concerted responses to the common set of perturbations. This chapter provides a description of how each step in the CHESCA is implemented, starting from the selection of the perturbation library and ending with an overview of different clustering options.

[Chemical weapons and chemical terrorism].

Science.gov (United States)

Nakamura, Katsumi

2005-10-01

Chemical Weapons are kind of Weapons of Mass Destruction (WMD). They were used large quantities in WWI. Historically, large quantities usage like WWI was not recorded, but small usage has appeared now and then. Chemical weapons are so called "Nuclear weapon for poor countrys" because it's very easy to produce/possession being possible. They are categorized (1) Nerve Agents, (2) Blister Agents, (3) Cyanide (blood) Agents, (4) Pulmonary Agents, (5) Incapacitating Agents (6) Tear Agents from the viewpoint of human body interaction. In 1997 the Chemical Weapons Convention has taken effect. It prohibits chemical weapons development/production, and Organization for the Prohibition of Chemical Weapons (OPCW) verification regime contributes to the chemical weapons disposal. But possibility of possession/use of weapons of mass destruction by terrorist group represented in one by Matsumoto and Tokyo Subway Sarin Attack, So new chemical terrorism countermeasures are necessary.

New Chemical Kinetics Approach for DSMC Applications to Nonequilibrium Flows, Phase II

Data.gov (United States)

National Aeronautics and Space Administration — A new chemical kinetics model and database will be developed for aerothermodynamic analyses on entry vehicles. Unique features of this model include (1) the ability...

New Chemical Kinetics Approach for DSMC Applications to Nonequilibrium Flows, Phase I

Data.gov (United States)

National Aeronautics and Space Administration — A new chemical kinetics model and database will be developed for aerothermodynamic analyses on entry vehicles. Unique features of this model include (1) the ability...

Aspectos biológico-pesqueros del pejerrey (Odontesthes regia regia en el puerto de Ilo durante 1996-1998

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Hugo Treviño

2014-06-01

Full Text Available Se analizaron los aspectos biológicos y pesqueros del pejerrey peruano (Odontesthes regia regia población en Ilo, desde enero de 1996 a septiembre de 1998. Las capturas fueron tres veces más alta (72,76 t que las de 1996 hasta 1997, mientras que con el calentamiento de "El Niño" en 1998 éstas se redujeron a 0,62 t. Durante el evento "El Niño 1997-1998" la población mostró también una serie de cambios en la distribución, la reproducción y la composición de la dieta. Estos cambios se asociaron a la incursión de agua subtropical superficial.

Chemical composition of chicken meat produced in extensive indoor ...

African Journals Online (AJOL)

Cooled carcasses were dissected into primal cuts. Breast and leg muscle (thigh and drumstick) samples were used for chemical analyses. The obtained results suggested that free range rearing system was more favourable than extensive indoor system, as it resulted in a significantly higher protein content and a lower fat ...

Physico-chemical characteristics and Heavy metal levels in Drinking ...

African Journals Online (AJOL)

Physico-chemical characteristics and Heavy metal levels in Drinking Water ... composition was analysed using X-ray Fluorescence spectroscopy. Majority of the water samples had neutral pH (6.80 – 7.20) few were slightly alkaline and one was acidic. ... Heavy metals (copper and lead), rare earth metals (gallium, rubidium, ...

How Flow Injection Analysis (FIA) over the past 25 years has changed our way of performing chemical analyses

DEFF Research Database (Denmark)

Hansen, Elo Harald; Miró, Manuel

2007-01-01

Briefly looking back on the impact of flow injection analysis (FIA), as reflected in the rapid growth of publications in the scientific literature, and touching upon many of the novel and unique analytical chemical possibilities that FIA and its sequels, sequential injection analysis (SIA) and La...

Advanced chemical analysis service for elements, radionuclides and phases

International Nuclear Information System (INIS)

Sansoni, B.

1986-01-01

A review is given on the structure, organisation and performance of the chemical analysis service of the Central Department for Chemical Analysis at the Kernforschungsanlage Juelich GmbH. The research and development programs together with the infrastructure of the Centre afford to analyse almost all stable elements of the periodical table in almost any material. The corresponding chemical analysis service has been organized according to a new modular system of analytical steps. According to this, the most complicated and, therefore, most general case of an analytical scheme for element and radionuclide analysis in any type of material can be differentiated into about 14 different steps, the modules. They are more or less independent of the special problem. The laboratory is designed and organized according to these steps. (orig./PW) [de

Pobreza en el barrio Moravia sector El Morro : una lectura de los aspectos socioeconómicos desde el enfoque de las capacidades humanas de Amartya Sen

OpenAIRE

Higuita Jaramillo, Ana Lucia; Navarro Peláez, Ana María

2006-01-01

La pobreza es una realidad social que ha sido objeto de estudio por parte de las Teorías Económicas. Este problema se ha analizado desde los diferentes enfoques y formas de medición que permiten el abordaje desde aspectos cuantitativos- línea de pobreza-, mientras que otros se centran en la persona y sus variables cualitativas- Necesidades Básicas, Insatisfechas, Capacidades-.

Erros de medicação em hospitais: uma análise bioética dos aspectos jurídicos e de saúde

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Gabriela Souza Schumacher

2013-06-01

Full Text Available Introdução: O tema dos erros de medicação envolve vários aspectos - éticos, morais, jurídicos, sociais, profissionais, assistenciais, entre outros - merecendo uma reflexão abrangente. Os aspectos éticos referem-se principalmente à adequação das ações frente aos erros e os aspectos jurídicos estão relacionados diretamente com a aferição da responsabilidade civil nos casos da ocorrência de danos. Este estudo busca estabelecer relações entre o Direito, a Saúde e a Bioética, em uma perspectiva interdisciplinar, por meio da avaliação dos acórdãos referentes a erros de medicação em hospitais na jurisprudência do Rio Grande do Sul. Materiais e Método: Foi realizada uma pesquisa qualitativa, de análise de conteúdo documental, em acórdãos colhidos na base de dados eletrônica do Tribunal de Justiça do estado do Rio Grande do Sul. O descritor utilizado para busca foi: erro de medicação em hospitais. Resultados e Discussão: foram localizados 43 acórdãos na base de dados no período de 1995 a 2011. Destes, apenas 6 acórdãos referem-se a erros de medicação especificamente, sendo que 2 não estão disponíveis na íntegra. Foram analisados os quatro acórdãos envolvendo erros de medicação. Nos 4 acórdãos os demandados foram: 3 hospitais, 1 município e 1 médico. Todas as decisões foram favoráveis aos demandantes. Considerações Finais: O conceito de erro de medicação, embora utilizado na área da saúde e por órgãos oficiais, não tem sido utilizado no Poder Judiciário, o que demonstra que uma maior aproximação das áreas envolvidas, incluindo uma melhor comunicação, é necessária para uma adequada compreensão do tema.

Efeitos da rochagem e de resíduos orgânicos sobre aspectos químicos e microbiológicos de um subsolo exposto e sobre o crescimento de Astronium fraxinifolium Schott Effects of ground basalt and organic residues on the chemical and microbiological aspects on bare subsoil and on the growth of Astronium fraxinifolium Schott

Directory of Open Access Journals (Sweden)

Eloisa Aparecida da Silva

2008-04-01

compaction problems, high global density, high resistance to root penetration and lack in organic matter. In order to recover such areas it is of paramount importance to improve general subsoil conditions. The objective of this research was to verify the effects of ground basalt ('rochagem' and application of different organic residues on the chemical and microbiological aspects of a bare subsoil, and on the growth of 'Gonçalo Alves' (Astronium fraxinifolium Schott, a native cerrado plant. The experiment was conducted under greenhouse conditions, with 17 treatments: subsoil of a degraded area with four levels of basalt (0, 2, 4 and 8 t ha-1, combined or not with 8 t ha-1 of three organic residues (water hyacinth, manure and domestic sewage, resulting in 16 treatments, plus an additional control composed of soil of a preserved cerrado vegetation, with four replications per treatment. Chemical and microbiological subsoil analyses were conducted, besides plant height, fresh and dry matter of shoot and root. The results indicated that the treatments with water hyacinth and manure, with or without basalt, provided the best contributions to improve the chemical and microbiological subsoil conditions, while the plants treated with domestic sewage and basalt presented the best growth. The ground basalt application showed positive results.

The Use of Chemical-Chemical Interaction and Chemical Structure to Identify New Candidate Chemicals Related to Lung Cancer.

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Lei Chen

Full Text Available Lung cancer causes over one million deaths every year worldwide. However, prevention and treatment methods for this serious disease are limited. The identification of new chemicals related to lung cancer may aid in disease prevention and the design of more effective treatments. This study employed a weighted network, constructed using chemical-chemical interaction information, to identify new chemicals related to two types of lung cancer: non-small lung cancer and small-cell lung cancer. Then, a randomization test as well as chemical-chemical interaction and chemical structure information were utilized to make further selections. A final analysis of these new chemicals in the context of the current literature indicates that several chemicals are strongly linked to lung cancer.

Calculation of neutron activation discriminating the chemical weapons underground using Monte Carlo methods

International Nuclear Information System (INIS)

Shen Chunxia; Qian Jianfu; Zhang Wenzhong

2003-01-01

This paper mainly calculate neutron activation discriminating the chemical weapons underground, and analyses the factors that soil influence discrimination, finally we conclude soil can not influence discrimination. (authors)

Análisis crítico de los aspectos teóricos del currículum flexible y abierto. Consecuencias educativas

Directory of Open Access Journals (Sweden)

José Penalva Buitrago

2007-01-01

Full Text Available Este artículo es un trabajo de investigación que somete a un análisis crítico la teoría del currículum escolar definido desde la flexibilidad y la apertura, prestando especial interés a nuestro sistema educativo. El artículo revisa, en un primer momento, las principales teorías en las que se inspira este modelo curricular, y, a continuación, analiza sus aspectos semánticos, epistemológicos, ontológicos y antropológicos, mostrando sus consecuencias educativas

Aspectos éticos en investigaciones no clínicas en el campo de la salud: Algunas consideraciones acerca del consentimiento informado en personas declaradas incapaces Ethical aspects in non - clinical investigations in health: Some considerations about the informed consent in incapable people

OpenAIRE

Pamela Garbus; Romina Solitario; Alicia Stolkiner

2009-01-01

Este trabajo se enmarca en el proyecto de investigación UBACyT P040 cuya directora es Alicia Stolkiner. El consentimiento informado es un aspecto dentro de la investigación social cuya utilización se ha convertido en una condición ineludible para sostener la viabilidad de un estudio dentro de aspectos éticos aceptables. El objetivo de este trabajo es analizar la especificidad que adquiere el consentimiento informado en investigación cuando se trata de realizar estudios con sujetos que han atr...

Aspectos biológicos y control de un gracilláriido (Gracillariidae: Lepidóptera en Caesalpinia spinosa (Mol. Kuntze (1898, en Cajamarca, Perú

Directory of Open Access Journals (Sweden)

Hipólito Murga Orrillo

2016-01-01

Full Text Available Se tuvo por objetivo determinar aspectos biológicos, identificar enemigos naturales, y establecer periodos oportunos de control de un gracillariido plaga de tara. Los aspectos biológicos y los enemigos naturales se evaluaron en campo y en laboratorio, los periodos oportunos de control se determinó por interacción hospedero - plaga. Los resultados, el huevo dura 7,8 días y mide 0,34x0,21mm; la larva presenta 4 instares y dura 35,7 días, variando de medidas entre 1 o y 4 o instar de 0,09 a 0,65 mm de diámetro de encéfalo ; la pupa dura 14,3 días y mide 6,7mmx1,1mm ; el adulto dura 7,5 días y mide 13,43 mm de expansión alar. Presenta enemigos naturales, familias Encyrtidae, Ichneumonidae, y géneros Chelonus sp., Chrysoperla sp., Hemerobius sp., Cicloneda sp . , Hipodamia sp., y Zelus spp. Las mejores épocas de control ocurren cuando la fenología de la tara est á entre R3.1 a R4 y R3.3 a R6.

Elemental analyses of bulk and individual particles by PIXE and SEM-EDX

International Nuclear Information System (INIS)

Kasahara, Mikio; Shinoda, Kazuyuki; Takahashi, Kanji; Yoshida, Kouji.

1993-01-01

The atmospheric aerosol samples were collected by a stacked filter method under the various environmental conditions. The elemental concentrations of aerosol particles were measured using PIXE analysis as a bulk sample. And also elemental compositions of about 200 individual particles per each sample were measured by SEM-EDX analysis. In this study, the correspondencies of analytical results measured by both analyses as well as chemical characteristics of individual and bulk aerosols were investigated. (author)

Chemometrical characterization of four italian rice varieties based on genetic and chemical analyses.

Science.gov (United States)

Brandolini, Vincenzo; Coïsson, Jean Daniel; Tedeschi, Paola; Barile, Daniela; Cereti, Elisabetta; Maietti, Annalisa; Vecchiati, Giorgio; Martelli, Aldo; Arlorio, Marco

2006-12-27

This paper describes a method for achieving qualitative identification of four rice varieties from two different Italian regions. To estimate the presence of genetic diversity among the four rice varieties, we used polymerase chain reaction-randomly amplified polymorphic DNA (PCR-RAPD) markers, and to elucidate whether a relationship exists between the ground and the specific characteristics of the product, we studied proximate composition, fatty acid composition, mineral content, and total antioxidant capacity. Using principal component analysis on genomic and compositional data, we were able to classify rice samples according to their variety and their district of production. This work also examined the discrimination ability of different parameters. It was found that genomic data give the best discrimination based on varieties, indicating that RAPD assays could be useful in discriminating among closely related species, while compositional analyses do not depend on the genetic characters only but are related to the production area.

Effects of different chemical materials and cultural methods on ...

African Journals Online (AJOL)

reading 6

2011-10-27

Oct 27, 2011 ... which accounts for 53% of wheat production in China and about 15% of the total ... environment as it is mainly made from chemical mate- rials. ... yield and yield components in harvest in both years were deter- mined. The data were subjected to analyses of variance (ANOVA) ..... Long-term stability of.

Forensic analyses of explosion debris from the January 2, 1992 Pd/D2O electrochemistry incident at SRI International

International Nuclear Information System (INIS)

Andresen, B.; Whipple, R.; Vandervoort, D.; Grant, P.

1992-01-01

The January 2, 1992 explosion in an electrochemistry laboratory at SRI International (SRI) resulted in the death of scientist Andrew Riley, and gained some notoriety due to its association with experimental work in the controversial field of cold fusion research. Selected components of explosion debris were subjected to forensic analyses at LLNL to elucidate potential causes of, or contributing factors to, the explosion. Interrogation of the debris by LLNL encompassed nuclear, chemical, physical, and materials investigations. Nuclear studies for the determination of tritium and neutron-activation products in stainless steel and brass were negative. No evidence of signature species indicative of orthodox nuclear events was detected. The inorganic and particulate analyses were likewise negative with respect to residues of unexpected chemical species. Such target compounds included conventional explosives, accelerants, propellants, or any exceptional industrial chemicals. The GC-MS analyses of trace organic components in the explosion debris provided perhaps the most interesting results obtained at LLNL. Although no evidence of organic explosives, oxidizers, or other unusual compounds was detected, the presence of a hydrocarbon oil in the interior of the electrochemical cell was established. It is likely that its source was lubricating fluid from the machining of the metal cell components. If residues of organic oils are present during electrolysis experiments, the potential exists for an explosive reaction in the increasingly enriched oxygen atmosphere within the headspace of a metal cell

Aspectos fisiológicos do mountain biking competitivo

Directory of Open Access Journals (Sweden)

Ricardo Dantas de Lucas

2010-12-01

Full Text Available A prática do ciclismo off-road (mountain biking - MTB, cresceu muito nas últimas duas décadas, sendo incluído como esporte olímpico, nos Jogos de Atlanta em 1996, na modalidade Cross Country. Na última década, houve um aumento no número de publicações científicas que verificaram a demanda fisiológica durante competições, assim como o estudo de possíveis preditores da performance nesta modalidade. O objetivo deste estudo de revisão foi descrever alguns aspectos fisiológicos específicos do MTB Cross Country (MTB CC competitivo (intensidade de provas, perfil fisiológico de atletas de elite, uso de suspensões e determinantes da performance em subidas. Observa-se na literatura analisada que as provas de MTB CC parecem impor uma sobrecarga fisiológica maior, quando analisada através da frequência cardíaca, do que provas de ciclismo de estrada com duração semelhante. Entretanto, quando analisada pela potência de pedalada, observa-se claramente a característica intermitente da modalidade, com variações de potência durante a prova entre zero e 500W, e potência média relativamente baixa em comparação aos valores de FC encontrados. Outro fator importante levantado neste estudo são as alterações fisiológicas decorrentes do uso de suspensões nas bicicletas de MTB CC. O uso deste equipamento reduz o estresse muscular provocado pelo terreno acidentado, embora pareça não afetar o gasto energético total, tanto em percurso plano como em subidas. Entretanto, é fato que o desempenho em circuitos acidentados é melhorado com o uso das suspensões. Com base nos estudos abordados nessa revisão, conclui-se que o MTB CC enquanto modalidade competitiva apresenta uma grande variação de intensidade (avaliada através da potência, sendo esta atribuída principalmente ao tipo de terreno (irregular e com muitas aclives e declives acentuados em que as provas de MTB CC acontecem.

Methodology for the physical and chemical exergetic analysis of steam boilers

International Nuclear Information System (INIS)

Ohijeagbon, Idehai O.; Waheed, M. Adekojo; Jekayinfa, Simeon O.

2013-01-01

This paper presents a framework of thermodynamic, energy and exergy, analyses of industrial steam boilers. Mass, energy, and exergy analysis were used to develop a methodology for evaluating thermodynamic properties, energy and exergy input and output resources in industrial steam boilers. Determined methods make available an analytic procedure for the physical and chemical exergetic analysis of steam boilers for appropriate applications. The energy and exergy efficiencies obtained for the entire boiler was 69.56% and 38.57% at standard reference state temperature of 25 °C for an evaporation ratio of 12. Chemical exergy of the material streams was considered to offer a more comprehensive detail on energy and exergy resource allocation and losses of the processes in a steam boiler. - Highlights: ► We evaluated thermodynamic properties and performance variables associated with material streams. ► We analysed resources allocation, and magnitude of exergetic losses in steam boilers. ► Chemical exergy of material streams contributed to improved exergy values. ► High operational parameter will lead to higher boiler exergy. ► Exergy destroyed was higher in the combustion as against the heat exchanging unit

Assessment of Surface Water Quality in the Malaysian Coastal Waters by Using Multivariate Analyses

International Nuclear Information System (INIS)

Yap, C.K.; Chee, M.W.; Shamarina, S.; Edward, F.B.; Chew, W.; Tan, S.G.

2011-01-01

Coastal water samples were collected from 20 sampling sites in the southern part of Peninsular Malaysia. Seven physico-chemical parameters were measured directly in-situ while water samples were collected and analysed for 6 dissolved trace metal concentrations. The surface water (0-20 cm) physico-chemical parameters including temperature, salinity, dissolved oxygen (DO), pH, total dissolved solids (TDS), specific conductance (SpC) and turbidity while the dissolved trace metals were Cd, Cu, Fe, Ni, Pb and Zn. The ranges for the physico-chemical parameters were 28.07-35.6 degree Celsius for temperature, 0.18-32.42 ppt for salinity, 2.20-12.03 mg/ L for DO, 5.50-8.53 for pH, 0.24-31.65 mg/ L for TDS, 368-49452 μS/ cm for SpC and 0-262 NTU for turbidity while the dissolved metals (mg/ L) were 0.013-0.147 for Cd, 0.024-0.143 for Cu, 0.266-2.873 for Fe, 0.027-0.651 for Ni, 0.018-0.377 for Pb and 0.032-0.099 for Zn. Based on multivariate analysis (including correlation, cluster and principal component analyses), the polluted sites were found at Kg. Pasir Puteh and Tg. Kupang while Ni and Pb were identified as two major dissolved metals of high variation in the coastal waters. Therefore, water quality monitoring and control of release of untreated anthropogenic wastes into rivers and coastal waters are strongly needed. (author)

Chemical modification and blending of polymers in an extruder reactor

International Nuclear Information System (INIS)

Prut, Eduard V; Zelenetskii, Alexandr N

2001-01-01

Chemical modification and blending of polymers in an extruder reactor are discussed. Relationships between the parameters affecting the reaction kinetics, viz., mixing time, duration of a chemical reaction and the residence time of the system in the extruder reactor, and the structure of the materials produced are analysed. The mechanisms of (i) grafting of low-molecular-mass compounds onto polymers; (ii) reactions between terminal groups of different polymers and (iii) transesterification and interchange reactions are considered. The factors affecting the mechanism of dynamic vulcanisation and the properties of thermoplastic elastomers are identified. Solid-phase reactions of polysaccharides in an extruder are discussed. The priority aspects of studies on the chemical modification and blending of polymers are noted. The bibliography includes 90 references.

Analyse en retour de la catastrophe de la Josefina (Equateur, 1993: contribution à la connaissance du concept de vulnérabilité appliqu�� aux mouvements de terrain

Directory of Open Access Journals (Sweden)

1996-01-01

Full Text Available Cet article dresse une description et une reconstitution de la catastrophe de la Josefina (Équateur, printemps 1993 aussi bien sur le plan phénoménologique (enchaînement, caractéristiques, hypothèses de déclenchement, reconstitution numérique du volume déplacé, etc. que sur le plan socio-économique (analyse des pertes et des dommages, gestion de la crise. Un protocole d’analyse particulier, reposant sur les notions de processus d’endommagement et d’éléments exposés vient éclairer le thème de la vulnérabilité tel qu’il est défini dans les analyses de risque. Cela se traduit en particulier sur le plan structurel et corporel par la création d’une matrice d’endommagement, encore partielle, mais qui laisse entrevoir de nombreuses perspectives d’applications. ANÁLISIS DE LA CATÁSTROFE DE LA JOSEFINA (ECUADOR, 1993: CONTRIBUCIÓN A LA DEFINICIÓN DEL CONCEPTO DE VULNERABILIDAD APLICADO A LOS MOVIMIENTOS DE TERRENO. Este artículo presenta una descripción y una reconstitución de la catástrofe de la Josefina (Ecuador, primavera de 1993. Se analizan tanto los aspectos fenomenológicos del evento (mecanismos, hipótesis sobre el desencadenamiento, reconstitución numérica del volumen desplazado, etc. como los aspectos relacionados a las pérdidas, los daños y la gestión de la crisis. Se analizan igualmente las nociones de proceso generador de daños y de elemento expuesto, con el fin de refinar el concepto de vulnerabilidad y de riesgo. Este análisis se materializa, al menos desde el punto de vista corporal y estructural, en una matriz de daños que aunque todavía es parcial, deja entrever un sinnúmero de aplicaciones. JOSEFINA'S DISASTER BACK ANALYSIS (ECUADOR, 1993. CONTRIBUTION TO VULNERABILITY CONCEPT APPLIED TO MASS MOVEMENTS. This paper sets a description and reconstitution of Josefina disaster (Ecuador, spring 1993 with particular attention on phenomenon and socio-economic aspects. A special analysis about

Energy and exergy analyses of a copper-chlorine thermochemical water decomposition pilot plant for hydrogen production

International Nuclear Information System (INIS)

Orhan, M.F.; Dincer, I.; Rosen, M.A.

2008-01-01

Nuclear-based hydrogen production via thermochemical water decomposition using a copper-chlorine (Cu-Cl) cycle consists of a series of chemical reactions in which water is split into hydrogen and oxygen as the net result. This is accomplished through reactions involving intermediate copper and chlorine compounds, which are recycled. Energy and exergy analyses are reported here of a Cu-Cl pilot plant, including the relevant chemical reactions. The reference environment is taken to be at a temperature of 298.15 K and atmospheric pressure (1 atm). The chemical exergy of a substance, which is the maximum work that can be obtained from it by taking it to chemical equilibrium with the reference environment at constant temperature and pressure, is calculated with property data for the substance and the reference environment, with enthalpy and entropy values calculated using Shomate equations. The reaction heat, exergy destruction and efficiencies in each chemical reaction vary with the reaction temperature and reference-environment temperature. A parametric study with variable reaction and reference-environment temperatures is also presented. (author)

Chemical composition of groundwater/drinking water and oncological disease mortality in Slovak Republic.

Science.gov (United States)

Rapant, S; Cvečková, V; Fajčíková, K; Dietzová, Z; Stehlíková, B

2017-02-01

This study deals with the analysis of relationship between chemical composition of the groundwater/drinking water and the data on mortality from oncological diseases (MOD) in the Slovak Republic. Primary data consist of the Slovak national database of groundwater analyses (20,339 chemical analyses, 34 chemical elements/compounds) and data on MOD (17 health indicators) collected for the 10-year period (1994-2003). The chemical and health data were unified in the same form and expressed as the mean values for each of 2883 municipalities within the Slovak Republic. Pearson and Spearman correlation as well as artificial neural network (ANN) methods were used for analysis of the relationship between chemical composition of groundwater/drinking water and MOD. The most significant chemical elements having influence on MOD were identified together with their limit values (limit and optimal contents). Based on the results of calculations, made through the neural networks, the following eight chemical elements/parameters in the groundwater were defined as the most significant for MOD: Ca + Mg (mmol l -1 ), Ca, Mg, TDS, Cl, HCO 3 , SO 4 and NO 3 . The results document the highest relationship between MOD and groundwater contents of Ca + Mg (mmol l -1 ), Ca and Mg. We observe increased MOD with low (deficit) contents of these three parameters of groundwater/drinking water. The following limit values were set for the most significant groundwater chemicals/parameters: Ca + Mg 1.73-5.85 mmol l -1 , Ca 60.5-196.8 mg l -1 and Mg 25.6-35.8 mg l -1 . At these concentration ranges, the mortality for oncological diseases in the Slovak Republic is at the lowest levels. These limit values are about twice higher in comparison with the current Slovak valid guideline values for the drinking water.

LCA of Chemicals and Chemical Products

DEFF Research Database (Denmark)

Fantke, Peter; Ernstoff, Alexi

2018-01-01

This chapter focuses on the application of Life Cycle Assessment (LCA) to evaluate the environmental performance of chemicals as well as of products and processes where chemicals play a key role. The life cycle stages of chemical products, such as pharmaceuticals drugs or plant protection products......, are discussed and differentiated into extraction of abiotic and biotic raw materials, chemical synthesis and processing, material processing, product manufacturing, professional or consumer product use, and finally end-of-life . LCA is discussed in relation to other chemicals management frameworks and concepts...... including risk assessment , green and sustainable chemistry , and chemical alternatives assessment. A large number of LCA studies focus on contrasting different feedstocks or chemical synthesis processes, thereby often conducting a cradle to (factory) gate assessment. While typically a large share...

Variability of chemical analysis of reinforcing bar produced in Saudi Arabia

Science.gov (United States)

Salman, A.; Djavanroodi, F.

2018-04-01

In view of the importance and demanding roles of steel rebar’s in the reinforced concrete structures, accurate information on the properties of the steels is important at the design stage. In the steelmaking process, production variations in chemical composition are unavoidable. The aim of this work is to study the variability of the chemical composition of reinforcing steel produced throughout the Saudi Arabia and asses the quality of steel rebar’s acoording to ASTM A615. 68 samples of ASTM A615 Grade 60 from different manufacturers were collected and tested using the Spectrometer test to obtain Chemical Compositions. EasyFit (5.6) software is utilized to conducted statistical analysis. Chemical compositions distributions and, control charts are generated for the compositions. Results showed that some compositions are above the upper line of the control chart. Finally, the analyses show that less than 3% of the steel failed to meet minimum ASTM standards for chemical composition.

Elemental analyses on porcelains of Tang and Song Dynasties excavated from Yongjinwan zone at Jinsha site

Science.gov (United States)

Xia, C. D.; Ge, L. J.; Liu, M. T.; Zhu, J. J.; An, Z.; Bai, B.

2018-02-01

The work presented here carried out elemental analyses on 60 porcelain shards of Tang and Song Dynasties, unearthed from Yongjinwan zone at Jinsha site, Sichuan, China, using a combination of PIXE and RBS methods. Six shards from Liulichang kiln site and 6 from Shifangtang kiln site were also analyzed as reference materials. The factor analyses for the elemental compositions in the bodies and glazes of the total 72 porcelain shards have been performed to explore their similarities and differences. Combining the results of factor analyses on elements in bodies and glazes and the classification by traditional archaeological criteria, the provenances for most of shards unearthed from Yongjinwan zone in Jinsha site could be determined. Majority of shards with a Qiong-kiln style were found as products of Liulichang kiln, this is consistent with Yongjinwan's geographical location and social environment, i.e., Yongjinwan was a suburban settlement nearest to Liulichang kiln in ancient times. Although both products of Liulichang kiln and Shifangtang kiln belonged to Qiong-kiln system and they shared a similar appearance such as red body and celadon glaze, there were distinct differences in chemical composition which could be unraveled by PIXE-RBS measurements and factor analysis. There were no apparent differences of chemical compositions for the same kinds of body and glaze between Tang and Song Dynasties, which may suggest that raw materials and production techniques for the same kinds of body and glaze continued between Tang and Song Dynasties. The chemical characteristics for each kind of body and glaze and the correlations between element composition and porcelain appearance were also obtained in this work.

Economic aspects of risk assessment in chemical safety

Energy Technology Data Exchange (ETDEWEB)

Drummond, M F; Shannon, H S

1986-05-01

This paper considers how the economic aspects of risk assessment in chemical safety can be strengthened. Its main focus is on how economic appraisal techniques, such as cost-benefit and cost-effectiveness analysis, can be adapted to the requirements of the risk-assessment process. Following a discussion of the main methodological issues raised by the use of economic appraisal, illustrated by examples from the health and safety field, a number of practical issues are discussed. These include the consideration of the distribution of costs, effects and benefits, taking account of uncertainty, risk probabilities and public perception, making the appraisal techniques useful to the early stages of the risk-assessment process and structuring the appraisal to permit continuous feedback to the participants in the risk-assessment process. It is concluded that while the way of thinking embodied in economic appraisal is highly relevant to the consideration of choices in chemical safety, the application of these principles in formal analysis of risk reduction procedures presents a more mixed picture. The main suggestions for improvement in the analyses performed are the undertaking of sensitivity analyses of study results to changes in the key assumptions, the presentation of the distribution of costs and benefits by viewpoint, the comparison of health and safety measures in terms of their incremental cost per life-year (or quality-adjusted life-year) gained and the more frequent retrospective review and revision of the economic analyses that are undertaken.

Chemical Preparation Laboratory IND Candidate Compounds.

Science.gov (United States)

1986-01-21

and final products unreported in the chemical literature were fully characterized by elemental and spectral analyses. 3 V% TABLE OF CONTENTS Page I...resulting crystalline material was filtered and washed with water to yield 2.0 g. An additional 0.2 g of the product was recovered from the above filtrate... mercaptopurine (Tri-C- acetvlthioinosine) (3): To a well stirred mixture of 2 (93.0 g, 0.236 mol) and pyridine (3570 mL), phosphorus pentasulfide (220.0 g, 0.49

Chemical, physical-chemical, and sensory characteristics of lychee (Litchi chinensis Sonn) wines.

Science.gov (United States)

Alves, Juliana Alvarenga; de Oliveira Lima, Luiz Carlos; Nunes, Cleiton Antônio; Dias, Disney Ribeiro; Schwan, Rosane Freitas

2011-01-01

Four lychee (Litchi chinensis Sonn) wines (prepared with 3 yeast strains [UFLA CA11, UFLA CA1183, and UFLA CA1174]) and a spontaneous fermentation (SPON) were done in order to add value to the fruit while preventing waste arising from the short shelf life of lychee. The fermentation was monitored daily by analyzing the soluble solids, pH, acidity, ethanol, and sugar. At the end of fermentation, the wines were subjected to chemical, physical-chemical, and sensory analysis. The wines prepared showed greater variations in the qualitative than in the quantitative analysis of their constituents. The sensory analysis indicated that the wines fermented by yeast UFLA CA1183 and UFLA CA11 had rates of acceptance above 75%. The principal components analysis separated the wines into 2 groups according to the analyzed compounds. Based on these analyses, the wine produced by inoculation with UFLA CA1183 proved to be the most suitable for the production of lychee wines. Development of new products and adding value to fruits. Importance of selection of specific yeasts for production of fruit wine. © 2011 Institute of Food Technologists®

Colostomy irrigation: review of a number of technical aspects Irrigación de la colostomía: revisión sobre algunos aspectos técnicos Irrigação da colostomia: revisão acerca de alguns aspectos técnicos

Directory of Open Access Journals (Sweden)

Isabel Umbelina Ribeiro Cesaretti

2008-01-01

Full Text Available OBJECTIVE: Performing a literature review about four technical aspects related to the colostomy irrigation: volume of water to be infused, postoperative moment to start the method's training sessions, maintenance of a 24-hour interval between the colostomy irrigations, and time spent for the execution of the procedure, aiming to contribute for the most adequate systematization of the method. METHODS: After searching in the designated sources, sixty-three articles were identified. RESULTS: It was observed that there is no consensus among the several authors: the volume of infused water varied from 500ml to 1500ml, although, in the clinical practice, the average infused volume is 1000ml; the postoperative moment to start the training sessions varied from five days to six months; the maintenance time of a 24-hour interval between the colostomy irrigations varied from two weeks to six months; time spent in the execution of the procedure varied from 20 to 90min. CONCLUSION: The knowledge of these results may be an encouragement to the nurses, especially stomatherapists, to reevaluate their practice, in order to standardize the technical aspects related to the procedure, having as basis the specialized assistance.OBJETIVO: Realizar una revisión bibliográfica sobre cuatro aspectos técnicos relacionados a la irrigación de la colostomía: volumen de agua a ser infundido, momento del post-operatorio en que se debe iniciar el entrenamiento para el uso del método, tiempo de manutención de 24 horas como intervalo entre las irrigaciones y tiempo gastado en la realización del procedimiento, visando contribuir en la sistematización más adecuada del método. MÉTODOS: Una vez realizadas las búsquedas en las fuentes planificadas, fueron identificados 63 artículos. RESULTADOS: Se observó la inexistencia de un consenso entre los diversos autores consultados: el volumen de agua infundido varió de 500ml a 1500ml, aunque, en la práctica, el volumen

Impacto de Parámetros de QoS en Aspectos de QoE: Análisis desde el Punto de Vista de la Sincronización Multimedia

NARCIS (Netherlands)

M.A. Montagud Climent (Mario); F. Boronat (Fernando); M. Martinez; J. Belda (Jordi); P.S. Cesar Garcia (Pablo Santiago)

2015-01-01

htmlabstractLa sincronización multimedia ha sido un área de investigación clave desde los inicios de los sistemas multimedia. En este artículo se ofrecen una visión general y un análisis sobre el impacto de varios parámetros de QoS en diferentes aspectos de la QoE, desde el punto de vista de la

Chemical leasing--a review of implementation in the past decade.

Science.gov (United States)

Moser, Frank; Jakl, Thomas

2015-04-01

In the past decade, research on innovative business models to manage the risk of chemical substances has sought to provide solutions to achieve the goals of the World Summit on Sustainable Development of 2002, which called for a renewal of the commitment to the sound management of chemicals and of hazardous wastes throughout their life cycle and set the ambitious goal, by 2020, to use and produce chemicals in ways that do not lead to significant adverse effects on human health and the environment. Chemical Leasing is an innovative business model that shows a great potential to become a global model for sustainable development within chemical management. This paper provides a review of the current standings of literature regarding the implementation of Chemical Leasing in the past decade. In doing so, the paper highlights the potential of this business model to serve as an approach for dematerializing production processes and managing the risks of chemicals at all levels. More in detail, it provides an outline of how Chemical Leasing has supported the alignment and implementation of the objectives of chemicals policy-makers and industry regarding the production and use of chemicals and analyses to what extent Chemical Leasing contributes to the implementation of a number of voluntary global initiatives, such as Cleaner Production, Sustainable Chemistry and Corporate Social Responsibility. This paper provides a systematic analysis of the gaps identified in literature regarding the implementation of Chemical Leasing business models. Based on this analysis, specific aspects in the field of Chemical Leasing are recommended to be further elaborated in order to increase the understanding and applicability of the business model.

Depressão na gravidez e prematuridade: Aspectos epistemológicos da investigação

Directory of Open Access Journals (Sweden)

Marcia Zucchi

1999-01-01

Full Text Available Este trabalho analisa pesquisas recentes que estudam a associação entre depressão na gravidez e prematuridade. A difusão de informações científicas faz dessa categoria nosográfica (depressão uma presença constante e, muito freqüentemente, imprecisa, nos discursos do senso comum. No campo da saúde mental, são várias as áreas que a abordam e de modos bastante diversos. Por outro lado, apesar de haver indicações sugerindo a influência de estados emocionais em desfechos orgânicos, permanecem dificuldades em demonstrá-la através dos métodos convencionais de pesquisa científica. Parece que um dos problemas em associar depressão à prematuridade deve-se a aspectos epistemológicos relacionados à demarcação teórica da depressão.

Aspectos de la respuesta inmune innata en las infecciones intramamarias causadas por Staphylococcus aureus en bovinos

Directory of Open Access Journals (Sweden)

Elizabet A.L Pereyra

2014-12-01

Full Text Available Staphylococcus aureus es el principal agente causante de mastitis bovina en Argentina y en el mundo. Esta bacteria ocasiona infecciones crónicas que generan importantes pérdidas a los productores y la industria lechera. El objetivo de este artículo es caracterizar los mecanismos que intervienen en la infección causada por S. aureus en la glándula mamaria bovina, evaluando dos aspectos diferentes del proceso infeccioso: por un lado, lo vinculado con la respuesta inmune innata por parte del hospedador, y por otro, la capacidad de la bacteria para evadir el sistema inmune e interactuar con diferentes tipos celulares. La exploración de la interacción de S. aureus con el sistema inmune de la glándula mamaria bovina permitirá identificar blancos para delinear nuevas alternativas preventivas o curativas, que contribuyan a evitar o eliminar las infecciones causadas por este organismo.