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Id: lil-459257
Autor: Pontes, Wendel José Teles; Oliveira, José Cândido Guerra de; Câmara, Cláudio Augusto Gomes da; Lopes, Adelmo C. H. R; Gondim Júnior, Manoel Guedes Correia; Oliveira, José Vargas de; Barros, Reginaldo; Schwartz, Manfred Oswald Erwin.
Título: Chemical composition and acaricidal activity of the leaf and fruit essential oils of Protium heptaphyllum (Aubl. ) Marchand (Burseraceae)
Fonte: Acta amaz;37(1):103-109, 2007. tab.
Idioma: en.
Resumo: Essential oils from leaves and fruits of Protiumheptaphyllum collected in Tamandaré beach Pernambuco/Brazil were analysed by GC/MS and tested for toxicity and repellent effect against the two spotted spider mite (Tetranychus urticae). The major constituent identified in the fruits was alpha-terpinene (47.6 percent) whereas oil from leaf contained mainly sesquiterpenes such as 9-epi-caryophyllene (21.4 percent), trans-isolongifolanone (10.7 percent) and 14-hydroxi-9-epi-caryophyllene (16.7 percent). The fruit oil was found to be more effective against the mite when compared to the leaf oil. Both showed mortality properties and oviposition deterrence in higher concentration (10 µl.l-1 air), but only the essential oil from fruits induced repellence on T. urticae.

O óleo essencial das folhas e frutos de Protiumheptaphyllum coletada em Tamandaré-Pernambuco foi analisado por CG/EM e testado sua toxicidade e efeito repelente contra ácaro rajado (Tetranychus urticae). O constituinte majoritário identificado nos frutos foi alfa-terpineno (47,6 por cento) enquanto que nas folhas foram os sesquiterpenos 9-epi-cariofileno (21,4 por cento), trans-isolongifolanona (10,7 por cento) and 14-hidroxi-9-epi-cariofileno (16,7 por cento). O óleo dos frutos foi mais eficiente contra o ácaro, comparado com o óleo das folhas. Ambos os óleos revelaram propriedades de mortalidade e deterrência de oviposição na maior concentração (10 µl.l-1 air) e apenas o óleo essencial dos frutos induziu repelência no T. urticae.
Descritores: Óleos Voláteis
Burseraceae
Hidrogênio
Responsável: BR6.1 - BCS - Biblioteca de Ciências da Saúde


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Id: lil-546979
Autor: Marques, Delcio Dias; Sartori, Rogério Antônio; Lemos, Telma Leda Gomes; Machado, Luciana Lucas; Souza, João Sammy Nery de; Monte, Francisco José Queiroz.
Título: Chemical composition of the essential oils from two subspecies of Protium heptaphyllum / Composição química do óleo essencial de duas subespécies do Protium heptaphyllum
Fonte: Acta amaz;40(1):227-230, mar. 2010. tab.
Idioma: en.
Resumo: Qualitative and quantitative analyses of the volatile constituents from resin of Protium heptaphyllum (Aubl.) Marchand subsp. ulei (Swat) Daly (PHU), and Protium heptaphyllum (Aubl.) Marchand subsp. heptaphyllum (PHH), Burseraceae were performed using GC-MS and GC-FID. The resins were collected around the city of Cruzeiro do Sul, state of Acre, Brazil. Essential oils from the two subspecies were extracted by hydrodistillation with a yield of 8.6 percent (PHU) and 11.3 percent (PHH); the main components were terpinolene (42.31 percent) and p-cymene (39.93 percent) for subspecies ulei (PHU) and heptaphyllum (PHH), respectively.

As análises qualitativa e quantitativa dos óleos essenciais obtidos das resinas das espécies Protium heptaphyllum (Aubl.) Marchand subespécie ulei (Swat) Daly (PHU) e Protium heptaphyllum (Aubl.) Marchand subespécie heptaphyllum (PHH), Burseraceae, foram realizadas utilizando cromatografia em fase gasosa acoplado a um espectrômetro de massa (CG-EM) e cromatografia a gás com detector de chama (CG-DIC). As resinas foram coletadas no Município de Cruzeiro do Sul, Acre, Brasil. O óleo essencial das oleoresinas foi extraído por hidrodestilação fornecendo rendimento 8,6 por cento para PHU e 11,3 por cento para PHH. Os monoterpenos terpinoleno (42.31 por cento) e p-cimeno (39.93 por cento) foram os constituintes principais para PHU e PHH, respectivamente.
Descritores: Óleos Voláteis
Burseraceae
Hidrogênio
Responsável: BR6.1 - BCS - Biblioteca de Ciências da Saúde


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Id: biblio-975992
Autor: Lifschitz, Carlos; Sieczkowska, Agnieszka.
Título: New insights into the fecal microbiota of children living in a slum: association with small bowel bacterial overgrowth / Novas ideias sobre a microbiota fecal de crianças que vivem em uma favela: associação com supercrescimento bacteriano do intestino delgado
Fonte: J. pediatr. (Rio J.);94(5):455-457, Sept.-Oct. 2018.
Idioma: en.
Descritores: Bactérias/crescimento & desenvolvimento
Fezes/microbiologia
Microbiota
Hidrogênio/análise
Intestino Delgado/microbiologia
Metano/análise
-Testes Respiratórios
Biomarcadores/análise
Áreas de Pobreza
Intestino Delgado/metabolismo
Limites: Humanos
Masculino
Feminino
Criança
Tipo de Publ: Editorial
Responsável: BR1.1 - BIREME


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Morais, Mauro Batista de
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Id: biblio-976017
Autor: Ozaki, Roberto Koity Fujihara; Speridião, Patrícia da Graça Leite; Soares, Ana Cristina Fontenele; Morais, Mauro Batista de.
Título: Intestinal fructose malabsorption is associated with increased lactulose fermentation in the intestinal lumen / Má absorção intestinal de frutose associa-se com maior fermentação de lactulose na luz intestinal
Fonte: J. pediatr. (Rio J.);94(6):609-615, Nov.-Dec. 2018. tab, graf.
Idioma: en.
Resumo: Abstract Objective: To study fructose malabsorption in children and adolescents with abdominal pain associated with functional gastrointestinal disorders. As an additional objective, the association between intestinal fructose malabsorption and food intake, including the estimated fructose consumption, weight, height, and lactulose fermentability were also studied. Methods: The study included 31 patients with abdominal pain (11 with functional dyspepsia, 10 with irritable bowel syndrome, and 10 with functional abdominal pain). The hydrogen breath test was used to investigate fructose malabsorption and lactulose fermentation in the intestinal lumen. Food consumption was assessed by food registry. Weight and height were measured. Results: Fructose malabsorption was characterized in 21 (67.7%) patients (nine with irritable bowel syndrome, seven with functional abdominal pain, and five with functional dyspepsia). Intolerance after fructose administration was observed in six (28.6%) of the 21 patients with fructose malabsorption. Fructose malabsorption was associated with higher (p < 0.05) hydrogen production after lactulose ingestion, higher (p < 0.05) energy and carbohydrate consumption, and higher (p < 0.05) body mass index z-score value for age. Median estimates of daily fructose intake by patients with and without fructose malabsorption were, respectively, 16.1 and 10.5 g/day (p = 0.087). Conclusion: Fructose malabsorption is associated with increased lactulose fermentability in the intestinal lumen. Body mass index was higher in patients with fructose malabsorption.

Resumo Objetivo: Pesquisar a má absorção de frutose em crianças e adolescentes com dor abdominal associada com distúrbios funcionais gastrintestinais. Como objetivo adicional, estudou-se a relação entre a má absorção intestinal de frutose e a ingestão alimentar, inclusive a estimativa de consumo de frutose, o peso e a estatura dos pacientes e a capacidade de fermentação de lactulose. Métodos: Foram incluídos 31 pacientes com dor abdominal (11 com dispepsia funcional, 10 com síndrome do intestino irritável e 10 com dor abdominal funcional). O teste de hidrogênio no ar expirado foi usado para pesquisar a má absorção de frutose e a fermentação de lactulose na luz intestinal. O consumo alimentar foi avaliado por registro alimentar. Foram mensurados também o peso e a estatura dos pacientes. Resultados: Má absorção de frutose foi caracterizada em 21 (67,7%) pacientes (nove com síndrome do intestino irritável, sete com dor abdominal funcional e cinco com dispepsia funcional). Intolerância após administração de frutose foi observada em seis (28,6%) dos 21 pacientes com má absorção de frutose. Má absorção de frutose associou-se com maior produção de hidrogênio após ingestão de lactulose (p < 0,05), maior consumo de energia e carboidratos (p < 0,05) e maior valor de escore z de IMC para a idade (p < 0,05). As medianas da estimativa de ingestão diária de frutose pelos pacientes com e sem má absorção de frutose foram, respectivamente, 16,1 e 10,5 g/dia (p = 0,087). Conclusão: Má absorção de frutose associa-se com maior capacidade de fermentação de lactulose na luz intestinal. O índice de massa corporal foi maior nos pacientes com má absorção de frutose.
Descritores: Dor Abdominal/metabolismo
Fermentação/fisiologia
Frutose/metabolismo
Mucosa Intestinal/metabolismo
Lactulose/metabolismo
Síndromes de Malabsorção/metabolismo
-Valores de Referência
Fatores de Tempo
Estatura/fisiologia
Peso Corporal/fisiologia
Testes Respiratórios
Intolerância à Frutose/metabolismo
Dor Abdominal/fisiopatologia
Estatísticas não Paramétricas
Ingestão de Alimentos/fisiologia
Hidrogênio/metabolismo
Mucosa Intestinal/fisiopatologia
Síndromes de Malabsorção/fisiopatologia
Limites: Humanos
Masculino
Feminino
Pré-Escolar
Criança
Adolescente
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME


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Id: biblio-838341
Autor: Zapata-Castilleja, Carlos A; Montes-Tapia, Fernando F; Treviño-Garza, Consuelo; Martínez-Cobos, María C; García-Cantú, Jesús; Arenas-Fabbri, Vincenzo; de la O-Escamilla, Norma; de la O-Cavazos, Manuel.
Título: Comparación del incremento del perímetro abdominal con la prueba de hidrógeno espirado como predictor clínico de intolerancia a la lactosa / Comparison of an increased waist circumference with a positive hydrogen breath test as a clinical predictor of lactose intolerance
Fonte: Arch. argent. pediatr;115(2):148-154, abr. 2017. graf, tab.
Idioma: en; es.
Resumo: Introducción. La intolerancia a la lactosa es una afección frecuente en pediatría, cuyo diagnóstico erróneo conlleva morbilidad. El objetivo primario del estudio fue evaluar la utilidad del incremento del perímetro abdominal durante la prueba de hidrógeno espirado como predictor de intolerancia a la lactosa. El objetivo secundario fue analizar la influencia del índice de masa corporal, de la medida de la cintura y de la edad en la distensión abdominal de pacientes intolerantes a la lactosa. Población y métodos. Se incluyó a 138 sujetos de entre 3 y 15 años de edad a los cuales se les realizaron mediciones seriadas del perímetro abdominal y determinaciones de hidrógeno espirado cada 30 minutos por 3 horas, durante la prueba de hidrógeno espirado. Resultados. Del total de la muestra, 35 (25,4%) resultaron intolerantes a la lactosa. El incremento de 0,85 cm en el perímetro abdominal comparado con el perímetro abdominal basal tiene sensibilidad del 88% y especificidad del 85% para predecir intolerancia a la lactosa (OR 42,14; IC 95%: 13,08-135,75; p <0,001). El índice de masa corporal y la medida de la cintura no afectaron la distensibilidad del abdomen (p= NS); sin embargo, la edad modificó el momento de la distensión. Conclusiones. El incremento del perímetro abdominal de 0,85 cm en relación con el perímetro abdominal basal durante la prueba de hidrógeno espirado es un parámetro útil para diagnosticar la intolerancia a la lactosa en pediatría. Las variaciones en relación con el índice de masa corporal y la cintura no modificaron la utilidad del incremento del perímetro abdominal a diferencia de la edad.

Introduction. Lactose intolerance is a common disease in pediatrics, and its wrong diagnosis will lead to morbidity. The primary objective of this study was to assess the usefulness of an increased waist circumference during the hydrogen breath test as a predictor of lactose intolerance. The secondary objective was to analyze the impact of body mass index, waist circumference measurement, and age on the abdominal distension of patients with lactose intolerance. Population and methods. A total of 138 subjects aged 3 to 15 years were included. They underwent serial measurements of the waist circumference and hydrogen levels in the breath every 30 minutes over 3 hours during the hydrogen breath test. Results. Out of the entire sample, 35 (25.4%) patients had lactose intolerance. An increase of 0.85 cm in waist circumference compared to the baseline waist circumference results in a sensitivity of 88% and a specificity of 85% to predict lactose intolerance (odds ratio: 42.14, 95% confidence interval: 13.08-135.75, p < 0.001). The body mass index and waist circumference measurement did not affect abdominal distension (p= not significant); however, age modified the time of distension. Conclusions. A 0.85 cm increase in waist circumference compared to the baseline waist circumference during the hydrogen breath test is a useful parameter for the diagnosis of lactose intolerance in pediatrics. Variations in relation to body mass index and waist circumference did not affect the usefulness of an increased waist circumference, unlike age.
Descritores: Testes Respiratórios
Circunferência da Cintura
Intolerância à Lactose/diagnóstico
-Estudos Transversais
Valor Preditivo dos Testes
Hidrogênio/análise
Limites: Humanos
Pré-Escolar
Criança
Adolescente
Tipo de Publ: Estudo Comparativo
Estudo Observacional
Responsável: AR94.1 - Centro de Información Pediatrica


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Id: lil-233845
Autor: Nogueira, Maria S; Mota, Helvécio C; Campos, Carlos A; Campos, Letícia L.
Título: Medidas dos fatores de conversäo H*(d)/Ka pra feixes de raios-X diagnóstico / Measure of H*(d)Ka conversion for Diagnostic X-rays fields
Fonte: In: Schiabel, Homero; Slaets, Annie France Frère; Costa, Luciano da Fontoura; Baffa Filho, Oswaldo; Marques, Paulo Mazzoncini de Azevedo. Anais do III Fórum Nacional de Ciência e Tecnologia em Saúde. Säo Carlos, s.n, 1996. p.514-514, graf.
Idioma: pt.
Conferência: Apresentado em: Fórum Nacional de Ciência e Tecnologia em Saúde, 3 e Congresso Brasileiro de Engenharia Biomédica, 15 e Congresso Brasileiro de Físicos em Medicina , 6 e Congresso Brasileiro de Informática em Saúde, 5 e Encontro Brasileiro de Proteçäo Radiológica, Campos do Jordäo, 13-17 out. 1996.
Resumo: Este trabalho apresenta os resultados da determinação experimental dos coeficientes de conversão da grandeza de calibração kerma no ar para a nova grandeza da ICRU de monitoração de área, H*(d). As medidas foram realizadas nas profundidades 10, 50 e 60 mm de uma esfera de PMMA de 30 cm de diâmetro em feixes de raios-X de radiodiagnóstico.
Descritores: Calibragem
Radiografia
Eletrodos
Hidrogênio
-Doses de Radiação
Fótons
Responsável: BR1.1 - BIREME
BR1.1/3012.37


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Id: biblio-1021461
Autor: Soo, Chiu-Shyan; Yap, Wai-Sum; Hon, Wei-Min; Ramli, Norhayati; Md Shah, Umi Kalsom; Phang, Lai-Yee.
Título: Co-production of hydrogen and ethanol by Escherichia coli SS1 and its recombinant
Fonte: Electron. j. biotechnol;30:64-70, nov. 2017. ilus, graf, tab.
Idioma: en.
Projeto: Fundamental Research Grant Scheme.
Resumo: Background: The development of a potential single culture that can co-produce hydrogen and ethanol is beneficial for industrial application. Strain improvement via molecular approach was proposed on hydrogen and ethanol co-producing bacterium, Escherichia coli SS1. Thus, the effect of additional copy of native hydrogenase gene hybC on hydrogen and ethanol co-production by E. coli SS1 was investigated. Results: Both E. coli SS1 and the recombinant hybC were subjected to fermentation using 10 g/L of glycerol at initial pH 7.5. Recombinant hybC had about 2-fold higher cell growth, 5.2-fold higher glycerol consumption rate and 3-fold higher ethanol productivity in comparison to wild-type SS1. Nevertheless, wild-type SS1 reported hydrogen yield of 0.57 mol/mol glycerol and ethanol yield of 0.88 mol/mol glycerol, which were 4- and 1.4-fold higher in comparison to recombinant hybC. Glucose fermentation was also conducted for comparison study. The performance of wild-type SS1 and recombinant hybC showed relatively similar results during glucose fermentation. Additional copy of hybC gene could manipulate the glycerol metabolic pathway of E. coli SS1 under slightly alkaline condition. Conclusions: HybC could improve glycerol consumption rate and ethanol productivity of E. coli despite lower hydrogen and ethanol yields. Higher glycerol consumption rate of recombinant hybC could be an advantage for bioconversion of glycerol into biofuels. This study could serve as a useful guidance for dissecting the role of hydrogenase in glycerol metabolism and future development of effective strain for biofuels production.
Descritores: Etanol/metabolismo
Escherichia coli/metabolismo
Hidrogênio/metabolismo
Hidrogenase/metabolismo
-Recombinação Genética
Biodegradação Ambiental
Meios de Cultura
Escherichia coli/enzimologia
Alcalinização
Fermentação
Glucose/metabolismo
Glicerol/metabolismo
Hidrogenase/genética
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1017382
Autor: Mamimin, Chonticha; Prasertsan, Poonsuk; Kongjan, Prawit; O-Thong, Sompong.
Título: Effects of volatile fatty acids in biohydrogen effluent on biohythane production from palm oil mill effluent under thermophilic condition
Fonte: Electron. j. biotechnol;29:78-85, sept. 2017. tab, graf, ilus.
Idioma: en.
Projeto: Khon Kaen University; . Thailand Research Fund.
Resumo: Background: Biohydrogen effluent contains a high concentration of volatile fatty acid (VFA) mainly as butyric, acetic, lactic and propionic acids. The presence of various VFAs (mixture VFAs) and their cooperative effects on two-stage biohythane production need to be further studied. The effect of VFA concentrations in biohydrogen effluent of palm oil mill effluent (POME) on methane yield in methane stage of biohythane production was investigated. Results: The methane yield obtained in low VFA loading (0.9 and 1.8 g/L) was 15­20% times greater than that of high VFA loading (3.6 and 4.7 g/L). Butyric acid at high concentrations (8 g/L) has the individual significantly negative effect the methane production process (P b 0.05). Lactic, acetic and butyric acid mixed with propionic acid at a concentration higher than 0.5 g/L has an interaction significantly negative effect on the methanogenesis process (P b 0.05). Inhibition condition had a negative effect on both bacteria and archaea with inhibited on Geobacillus sp., Thermoanaerobacterium thermosaccharolyticum, Methanoculleus thermophilus and Methanothermobacter delfuvii resulting in low methane yield. Conclusion: Preventing the high concentration of butyric acid, and propionic acid in the hydrogenic effluent could enhance methane production in two-stage anaerobic digestion for biohythane production.
Descritores: Propionatos/metabolismo
Butiratos/metabolismo
Águas Residuárias/microbiologia
Metano/biossíntese
-Propionatos/análise
Butiratos/análise
Óleo de Palmeira
Methanobacteriaceae
Archaea
Methanomicrobiaceae
Geobacillus
Fermentação
Águas Residuárias/análise
Hidrogênio
Anaerobiose
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1009654
Autor: Soo, Chiu-Shyan; Yap, Wai-Sum; Hon, Wei-Min; Ramli, Norhayati; Md Shah, Umi Kalsom; Phang, Lai-Yee.
Título: Improvement of hydrogen yield of ethanol-producing Escherichia coli recombinants in acidic conditions
Fonte: Electron. j. biotechnol;26:27-32, Mar. 2017. tab, ilus, graf.
Idioma: en.
Projeto: Fundamental Research Grant Scheme; . Science and Technology Research Grant.
Resumo: Background: An effective single culture with high glycerol consumption and hydrogen and ethanol coproduction yield is still in demand. A locally isolated glycerol-consuming Escherichia coli SS1 was found to produce lower hydrogen levels under optimized ethanol production conditions. Molecular approach was proposed to improve the hydrogen yield of E. coli SS1 while maintaining the ethanol yield, particularly in acidic conditions. Therefore, the effect of an additional copy of the native hydrogenase gene hycE and recombinant clostridial hydrogenase gene hydA on hydrogen production by E. coli SS1 at low pH was investigated. Results: Recombinant E. coli with an additional copy of hycE or clostridial hydA was used for fermentation using 10 g/L (108.7 mmol/L) of glycerol with an initial pH of 5.8. The recombinant E. coli with hycE and recombinant E. coli with hydA showed 41% and 20% higher hydrogen yield than wild-type SS1 (0.46 ± 0.01 mol/mol glycerol), respectively. The ethanol yield of recombinant E. coli with hycE (0.50 ± 0.02 mol/mol glycerol) was approximately 30% lower than that of wild-type SS1, whereas the ethanol yield of recombinant E. coli with hydA (0.68 ± 0.09 mol/mol glycerol) was comparable to that of wild-type SS1. Conclusions: Insertion of either hycE or hydA can improve the hydrogen yield with an initial pH of 5.8. The recombinant E. coli with hydA could retain ethanol yield despite high hydrogen production, suggesting that clostridial hydA has an advantage over the hycE gene in hydrogen and ethanol coproduction under acidic conditions. This study could serve as a useful guidance for the future development of an effective strain coproducing hydrogen and ethanol.
Descritores: Etanol/metabolismo
Escherichia coli/metabolismo
Hidrogênio/metabolismo
-Biotecnologia
Proteínas Recombinantes
Clostridium/genética
Clostridium/metabolismo
Escherichia coli/enzimologia
Escherichia coli/genética
Fermentação
Glicerol
Concentração de Íons de Hidrogênio
Hidrogenase/genética
Hidrogenase/metabolismo
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1009757
Autor: Matsakas, Leonidas; Gao, Qiuju; Jansson, Stina; Rova, Ulrika; Christakopoulos, Paul.
Título: Green conversion of municipal solid wastes into fuels and chemicals
Fonte: Electron. j. biotechnol;26:69-83, Mar. 2017. ilus, graf, tab.
Idioma: en.
Resumo: Presently, the society is facing a serious challenge for the effective management of the increasing amount of produced municipal solid wastes. The accumulated waste has caused a series of environmental problems such as uncontrolled release of greenhouse gases. Moreover, the increasing amount of wastes has resulted in a shortage of areas available for waste disposal, resulting in a nonsustainable waste management. These problems led to serious public concerns, which in turn resulted in political actions aiming to reduce the amount of wastes reaching the environment. These actions aim to promote sustainable waste management solutions. The main objective of these policies is to promote the recycling of municipal solid waste and the conversion of waste to energy and valuable chemicals. These conversions can be performed using either biological (e.g., anaerobic digestion) or thermochemical processes (e.g., pyrolysis). Research efforts during the last years have been fruitful, and many publications demonstrated the effective conversation of municipal solid waste to energy and chemicals. These processes are discussed in the current review article together with the change of the waste policy that was implemented in the EU during the last years.
Descritores: Resíduos Sólidos
Gerenciamento de Resíduos/métodos
Fontes Geradoras de Energia
-Digestão Anaeróbia
Pirólise
Eliminação de Resíduos
Cidades
Etanol
Meio Ambiente
Biocombustíveis
Hidrogênio
Metano
Tipo de Publ: Revisão
Responsável: CL1.1 - Biblioteca Central



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