خيارات البحث
النتائج 11 - 20 من 434
Remunerate the protection of water sources | Remunerar la protección de las fuentes de agua النص الكامل
2003
Gámez, Luis
No disponible/Not available
اظهر المزيد [+] اقل [-]Access to drinking water in Costa Rica | Acceso a agua potable en Costa Rica النص الكامل
2003
Valverde, Ricardo
No disponible/Not available
اظهر المزيد [+] اقل [-][The water sector: water resources or financial resources shortage] | El sector del agua: escasez de recursos hídricos o de recursos financieros
2003
Barraqué, B.
Metales pesados en agua de bebederos de presión Heavy metals in water of drinking fountains. النص الكامل
2003
Susana I Segura-Muñoz | Tânia M Beltramini Trevilato | Angela M M. Takayanagui | Sylvia E Hering | Palmira Cupo
RESUMEN. El objetivo del presente estudio fue analizar los niveles de plomo (Pb), cadmio (Cd), aluminio (Al), zinc (Zn), cobre (Cu) y cromo (Cr) en agua de bebederos de presión distribuidos en el Campus de la Universidad de San Paulo, Ribeirão Preto, Brasil. Fueron colectadas 30 muestras aleatoriamente obtenidas en diferentes instancias del Campus y analizadas por Espectrofotometría de Absorción Atómica. De acuerdo con la Guía de Valores Máximos Recomendados de la Organización Mundial de la Salud (OMS), plomo, cadmio y zinc se detectaron en concentraciones superiores a las recomendadas en 40%, 20% y 13% de las muestras, respectivamente. Los resultados son analizados considerando aspectos nutricionales y toxicológicos, referente a la presencia de metales esenciales y tóxicos para el hombre. Comparando los límites reglamentados en diez países de América, se pone de manifiesto la necesidad de un consenso en el establecimiento de las concentraciones máximas de metales en agua potable. La Ingesta Diaria Tolerable, debe ser la base para el establecimiento del nivel máximo de metales en agua, con la finalidad de prevenir la aparición de enfermedades asociadas a largo plazo.<br>SUMMARY. The purpose of this study was to analyze the levels of lead (Pb), cadmium (Cd), aluminum (Al), zinc (Zn), cooper (Cu) and chromium (Cr) in the water of drinking fountains distributed in the Campus of the University of São Paulo, Ribeirão Preto, Brazil. Thirty random samples were collected in different parts of the Campus that were analyzed by Atomic Absorption Spectrophotometry. According to WHO’s Drinking Water Guidelines; lead, cadmium and zinc were found in concentrations higher than those recommended in 40%, 20% and 13% of the samples, respectively. The results were analyzed considering nutritional and toxicological aspects related to the presence of essential and toxic elements for the human being. Reviewing the regulatory limits established in ten countries of America, authors focus in the necessity to find a consensus in the establishment of the higher levels of heavy metals in potable water. The tolerable daily intake, have to be the basis to assure the prevention of diseases associated with a long-term ingestion of these elements through foods.
اظهر المزيد [+] اقل [-][The irrigation water demand in Europe: the impact of Agenda 2000 and Water Framework Directive] | La demanda de agua de riego en Europa: el impacto de la Agenda 2000 y la Directiva Marco del Agua
2003
Massarutto, A.
Water: global struggle between private capital and justice | Agua: lucha mundial entre capital privado y justicia النص الكامل
2003
Durán, Osvaldo
No disponible/Not available
اظهر المزيد [+] اقل [-]Abundance, neglect and water crisis in Costa Rica | Abundancia, descuido y crisis del agua en Costa Rica النص الكامل
2003
Mata, Alfonso
No disponible/Not available
اظهر المزيد [+] اقل [-][Evaluation of soil water holding capacity from Andalusia [Spain] by the analysis of average annual water balance] | Evaluación de la capacidad de retención de agua de los suelos de Andalucía mediante el análisis del balance medio anual del agua
2003
Vanderlinden, K. (Universidad de Granada (España). Centro Andaluz del Medio Ambiente) | Giráldez, J.V. | Meirvenne, M. van
Knowledge of the soil water holding capacity, Wo, is essential to the regional evaluation of the soil water balance, but this information is generally not available. In this work we propose a methodology to produce a map of Wo in Andalusia, using pedotransfer functions and geostatistics. The Wo estimates are evaluated in terms of the average annual total runoff and actual evapotranspiration, obtained with a simple bucket water balance model. Comparison of the results with other work shows that the proposed methodology underestimates Wo on average by 45%. | La información sobre la capacidad de retención del agua en el suelo, Wo, es esencial para la evaluación regional del balance de agua, pero en general no se dispone de observaciones o estimaciones de este parámetro. En este trabajo se propone una metodología para elaborar un mapa de la Wo en Andalucía, empleando funciones de edafotransferencia y geoestadística. Las estimaciones de Wo son evaluadas en términos de la escorrentía total y la evapotranspiración real media anual, que se obtienen al aplicar un simple modelo para el balance de agua. Comparación de los resultados con otros estudios sugiere que la metodología propuesta subestima la Wo en un 45% de promedio.
اظهر المزيد [+] اقل [-]Carbohydrate measuvements on four brands of coconut water | Teores de glicídios em quatro marcas de água de coco النص الكامل
2015 | 2003
Oliveira, Hernete de Jesus Santos | Abreu, Celeste Maria Patto de | Santos, Custódio Donizete dos | Cardoso, Maria das Graças | Teixeira, Juliana Érica Carvalho | Guimarães, Nilson César Castanheira
Carbohydrate measuvements on four brands of coconut water | Teores de glicídios em quatro marcas de água de coco النص الكامل
2015 | 2003
Oliveira, Hernete de Jesus Santos | Abreu, Celeste Maria Patto de | Santos, Custódio Donizete dos | Cardoso, Maria das Graças | Teixeira, Juliana Érica Carvalho | Guimarães, Nilson César Castanheira
Utilization of water from dry coconuts to produce long-life coconut water, using a 20% mixture of green coconut water in order to reach the quality standard demanded by Brazilian customers, has been done since 2000. That is one more alternative for the by products from Cocos nucifera L. processing industries, introducing marketing advantages like: better storage, longer shelf life, transportation, and visual quality to the customer. Packed with ultrasonic Swedish technology, coconut water has been already commercialized in establishments in Southeastern Brazil. In this work, carbohydrate contents of four coconut water brands and the natural coconut water were comparatively analyzed, and the contents of fructose, glucose, sucrose, total sugars, and reducing sugars were determined. The coconut water used in this research was bought in Lavras, Minas Gerais St., as well as the green coconut water, which was used as a control. The statistical design was completely randomized, and the treatments were five brands with five replicates. The analyses were performed in the Biochemistry laboratory, of UFLA's Chemistry Department. Two out of four commercial brands, brands B and D, did not achieve the quality standards cited in the literature. | O aproveitamento da água de coco seco, para a produção de água de coco longa-vida com uma mistura de 20% de água de coco verde, para atingir o padrão de qualidade exigido pelo consumidor brasileiro, vem sendo utilizado desde 2000. Trata-se de mais uma alternativa para as indústrias de processamento dos produtos derivados dos frutos de Cocos nucifera L., apresentando vantagens mercadológicas como: facilidade de estocagem, maior vida de prateleira, transporte e exposição ao consumidor. Embalada com tecnologia sueca ultra-sônica, já está sendo comercializada em estabelecimentos de gêneros alimentícios também na região sudeste do Brasil. Com este trabalho, analisou-se comparativamente o teor de glicídios de quatro marcas de água de coco, comparadas com o coco natural, determinando frutose, glicose, sacarose, açúcares totais e açúcares redutores. As águas de coco são comercializadas na região de Lavras - Minas Gerais, bem como o coco verde utilizado como controle. O delineamento experimental utilizado foi o DIC, com os tratamentos dispostos num esquema cinco marcas e cinco repetições. As análises dos glicídios foram realizadas no laboratório de Bioquímica do Departamento de Química da Universidade Federal de Lavras. Das quatro marcas estudadas, a marca B e D não se encontra dentro dos padrões citados na literatura.
اظهر المزيد [+] اقل [-]Carbohydrate measuvements on four brands of coconut water Teores de glicídios em quatro marcas de água de coco النص الكامل
2003
Hernete de Jesus Santos Oliveira | Celeste Maria Patto de Abreu | Custódio Donizete dos Santos | Maria das Graças Cardoso | Juliana Érica Carvalho Teixeira | Nilson César Castanheira Guimarães
Utilization of water from dry coconuts to produce long-life coconut water, using a 20% mixture of green coconut water in order to reach the quality standard demanded by Brazilian customers, has been done since 2000. That is one more alternative for the by products from Cocos nucifera L. processing industries, introducing marketing advantages like: better storage, longer shelf life, transportation, and visual quality to the customer. Packed with ultrasonic Swedish technology, coconut water has been already commercialized in establishments in Southeastern Brazil. In this work, carbohydrate contents of four coconut water brands and the natural coconut water were comparatively analyzed, and the contents of fructose, glucose, sucrose, total sugars, and reducing sugars were determined. The coconut water used in this research was bought in Lavras, Minas Gerais St., as well as the green coconut water, which was used as a control. The statistical design was completely randomized, and the treatments were five brands with five replicates. The analyses were performed in the Biochemistry laboratory, of UFLA's Chemistry Department. Two out of four commercial brands, brands B and D, did not achieve the quality standards cited in the literature.<br>O aproveitamento da água de coco seco, para a produção de água de coco longa-vida com uma mistura de 20% de água de coco verde, para atingir o padrão de qualidade exigido pelo consumidor brasileiro, vem sendo utilizado desde 2000. Trata-se de mais uma alternativa para as indústrias de processamento dos produtos derivados dos frutos de Cocos nucifera L., apresentando vantagens mercadológicas como: facilidade de estocagem, maior vida de prateleira, transporte e exposição ao consumidor. Embalada com tecnologia sueca ultra-sônica, já está sendo comercializada em estabelecimentos de gêneros alimentícios também na região sudeste do Brasil. Com este trabalho, analisou-se comparativamente o teor de glicídios de quatro marcas de água de coco, comparadas com o coco natural, determinando frutose, glicose, sacarose, açúcares totais e açúcares redutores. As águas de coco são comercializadas na região de Lavras - Minas Gerais, bem como o coco verde utilizado como controle. O delineamento experimental utilizado foi o DIC, com os tratamentos dispostos num esquema cinco marcas e cinco repetições. As análises dos glicídios foram realizadas no laboratório de Bioquímica do Departamento de Química da Universidade Federal de Lavras. Das quatro marcas estudadas, a marca B e D não se encontra dentro dos padrões citados na literatura.
اظهر المزيد [+] اقل [-][Ecology of the daily life: gardening with less water] | Ecología de la vida cotidiana: jardinería con menos agua
2003
Anón.
