Caracterização de uma amilase de sementes de Libidibia ferrea (Mart. ex. Tul.).

Caracterizar uma amilase de extratos aquosos de sementes de L. ferrea quanto à estabilidade térmica e massa molecular

Soil Co 2 Emission Of Sugarcane Fields As Affected By Topography

The spatial and temporal variation of soil CO 2 emission is influenced by several soil attributes related to CO 2 production and its diffusion in the soil. However, few studies aiming to understand the effect of topography on the variability of CO 2 emissions exist, especially for cropping areas of tropical regions. The objective of this study was to evaluate the spatial and temporal changes of soil CO 2 emission and its relation to soil attributes in an area currently cropped with sugarcane under different relief forms and slope positions. Mean CO 2 emissions in the studied period (seven months) varied between 0.23 and 0.71, 0.27 and 0.90, and 0.31 and 0.80 g m -2 h -1 of CO 2 for concave (Cone), backslope (BackS) and footslope (FootS) positions, respectively. The temporal variability of CO 2 emissions in each area was explained by an exponential relation between the CO 2 emission and soil temperature and a linear relation between CO 2 emission and soil water content. The Q 10 values were 1.98 (± 0.34), 1.81 (± 0.49) and 1.71 (± 0.31) for Conc, BackS and FootS, respectively. Bulk density, macroporosity, penetration resistance, aggregation and oxidizable organic carbon content explain the changes in soil CO 2 emission observed, especially when the Cone position was compared to BackS. The effect of relief form and topographic position on soil CO 2 emission variation was dependent on the time of measurement.6617783ALVENÄS, G., JANSSON, P.E., Model for evaporation, moisture and temperature of bare soil: Calibration and sensitivity analysis (1997) Agricultural and Forest Meteorology, 88, pp. 47-56BERNOUX, M., CARVALHO, M.C.S., VOLKOFF, B., CERRI, C.C., CO 2 emission from mineral soils following land-cover change in Brazil (2001) Global Change Biology, 7, pp. 779-787BERNOUX, M., CARVALHO, M.C.S., VOLKOFF, B., CERRI, C.C., Brazil's soil carbon stocks (2002) Soil Science Society of America Journal, 66, pp. 888-896CAMPOS, D.C., (2003) Potencialidade do sistema de colheita sem queima da cana-de-açúcar para o seqüestro de carbono, , Piracicaba: USP/ESALQ, 103p, Doutorado(2007) Acompanhamento da safra brasileira de cana-de-açúcar, , http://www.conab.gov.br/conabweb/download/safra/3-levantamento0708-nov2007.pdf, COMPANHIA NACIONAL DE ABASTECIMENTO, CONAB, safra, terceiro levantamento, novembro/. Available at:, Accessed 21 Jan. 2008. 2008DANIELS, R.B., HAMMER, R.D., Soil geomorphology (1992) New York: Jonh Wiley, , 236pDAVIDSON, E.A., JANSSENS, I.A., Temperature sensitivity of soil carbon decomposition and feedbacks to climate change (2006) Nature, 440, pp. 165-173DeJONG, E., Soil aeration as affected by slope position and vegetative cover (1981) Soil Science, 131, pp. 34-43Manual de métodos de análise de solo (1997) Rio de Janeiro: Embrapa/CNPS, , EMPRESA BRASILEIRA DE PESQUISA AGROPECUÁRIA, 2 ed, 212pManual de métodos de análise do solo (1979) Rio de Janeiro: Embrapa-SNLCS, , EMPRESA BRASILEIRA DE PESQUISA AGROPECUÁRIA, 247pEPRON, D., BOSC, A., BONAL, D., FREYCON, V., Spatial variation of soil respiration across a topographic gradient in a tropical rain forest in French Guiana (2006) Journal of Tropical Ecology, 22, pp. 565-574FANG, C., MONCRIEFF, J.B., GHOLZ, H.X., CLARK, K.L., Soil CO 2 efflux and its spatial variation in a Florida slash pine plantation (1998) Plant Soil, 205, pp. 135-146FANG, C., MONCRIEFF, J.B., The dependence of soil CO 2 efflux on temperature (2001) Soil Biology and Biochemistry, 33, pp. 155-165FANG, C., MONCRIEFF, J.B., A model for soil CO 2 production and transport. 1. Model development (1999) Agricultural and Forest Meteorology, 95, pp. 225-236GARDNER, W.H., Water content (1986) Agronomy Monograph, 9, pp. 493-541. , KLUTE, A, Ed, Methods of soil analysis. 2 ed. Madison: ASAHANSON, P.J., WULLSCHLEGER, S.D., BOHMAN, S.A., TODD, D.E., Seasonal and topographic patterns of forest floor CO 2 efflux from an upland oak forest (1993) Tree Physiology, 13, pp. 1-15HEALY, R.W., STRIEGL, R.G., RUSSELL, T.F., HUTCHINSON, G.L., LIVINGSTON, G.P., Numerical evaluation of static-chamber measurements of soil-atmosphere gas exchange: Identification of physical processes (1996) Soil Science Society of America Journal, 60, pp. 740-747JIA, S.AKIYAMA, T.MO, WINATOMI, M.KOIZUMI, H. Temporal and spatial variability of soil respiration in a cool temperate broad-leaved forest. 1. Measurement of spatial variance and factor analysis. Japanese Journal of Ecology, v.53, p.13-22, 2003KANG, S., LEE, D., LEE, J., RUNNING, S.W., Topographic and climatic controls on soil environments and net primary in a rugged temperate hardwood forest in Korea (2006) Ecological Research, 21, pp. 64-74KANG, S., DOH, S., LEE, D., LEE, D., JIN, V.L., KIMBALL, J., Topographic and climatic controls on soil respiration in six temperate mixed-hardwood forest slopes, Korea (2003) Global Change Biology, 9, pp. 1427-1437KANG, S., KIM, S., DOH, S., LEE, D., Predicting spatial and temporal patterns of soil temperature based on topography, surface cover and air temperature (2000) Forest Ecology and Management, 136, pp. 173-184KEMPER, W.D.ROSENAU, R.C. Aggregate stability and size distribution. In: KLUTE, A. (Ed.) Methods of soil analysis. 2 ed. Madison: ASA, 1986. p.425-441. (Agronomy Monography, 9)KOSUGI, Y., MITANI, T., ITOH, M., NOGUCHI, S., TANI, M., MATSUO, N., TAKANASHI, S., NIK, A.R., Spatial and temporal variation in soil respiration in a Southeast Asian tropical rainforest (2007) Agricultural and Forest Meteorology, 147, pp. 35-47LA SCALA JÚNIOR, N.MARQUES JÚNIOR, J.PEREIRA, G.T.CORÁ, J.E. Carbon dioxide emission related to chemical properties of a tropical bare soil. Soil Biology and Biochemistry, v.32, p.1469-1473, 2000LI, H., YAN, J., YUE, X., WANG, M., Significance of soil temperature and moisture for soil respiration in a Chinese mountain area (2008) Agriculture and Forest Meteorology, 148, pp. 490-503LLOYD, J., TAYLOR, J.A., On the temperature-dependence of soil respiration (1994) Functional Ecology, 8, pp. 315-323OADES, J.M., Soil organic matter and structural stability: Mechanisms and implications for management (1984) Plant and Soil, 76, pp. 319-337PARKIN, T.B., KASPAR, T.C., SENWO, Z., PRUEGER, J.H., HATFIELD, J.L., Relationship of soil respiration to crop and landscape in the walnut creek watershed (2005) Journal of Hydrometeorology, 6, pp. 812-824PENG, Y., THOMAS, S.C., Soil CO 2 efflux in uneven-aged managed forests: Temporal patterns following harvest and effects of edaphic Heterogeneity (2006) Plant and Soil, 289, pp. 253-264RAIJ, B., van, QUAGGIO, J.A., CANTARELLA, H., FERREIRA, M.E., LOPES, A.S., BATAGLIA, C.O., (1987) Análise química do solo para fins de fertilidade, , Campinas: Fundação Cargill, 170pRAICH, J.W., SCHLESINGER, W.H., The global carbon dioxide flux in soil respiration and its relationship to climate (1992) Tellus, 44 B, pp. 81-99RETH, S., MARKUS, R., FALGE, E., The effect of soil water content, soil temperature, soil pH-value and the root mass on soil CO 2 efflux: A modified model (2005) Plant and Soil, 268, pp. 21-33RISCH, A.C., FRANK, D.A., Carbon dioxide fluxes in a spatially and temporally heterogeneous temperate grassland (2006) Oecologia, 147, pp. 291-302(1998) SAS/STAT: User's guide, , SAS INSTITUTE, Cary: SAS InstituteSCHWERTMANN, U., TAYLOR, R.M., Iron oxides (1989) Minerals in soil environments, pp. 379-438. , DIXON, J. B, WEED, S. B, Ed, Madison: SSSASILVA, A.C.TORRADO, P.V.MARTIN-NETO, L.VASQUEZ, F.M.PÉREZ, M.G. Soil organic matter and geomorphic surface stability relationship in an oxisol toposequence (SE-Brazil). In: INTERNATIONAL MEETING OF THE INTERNATIONAL HUMIC SUBSTANCES SOCIETY, 12., São Pedro, 2004. Proceedings. São Carlos: Embrapa Instrumentação Agropecuária, 2004. v.1, p.623-626SOTTA, E.D., VELDKAMP, E., GUIMARÃES, B.R., PAIXÃO, R.K., RUIVO, M.L.P., ALMEIDA, S.S., Landscape and climatic controls on spatial and temporal variation in soil CO 2 efflux in an Eastern Amazonian Rainforest, Caxiuanã, Brazil (2006) Forest Ecology and Management, 237, pp. 57-64SOUZA, C.K., MARQUES JÚNIOR, J., MARTINS FILHO, M.V., PEREIRA, G.T., Influência do relevo e erosão na variabilidade espacial de um latossolo em Jaboticabal (SP). (2003) Revista Brasileira de Ciência do Solo, 27, pp. 1067-1074SOUZA, Z.M., MARQUES JÚNIOR, J., PEREIRA, G.T., MOREIRA, L.F., Influência da pedoforma na variabilidade espacial de alguns atributos físicos e hídricos de um Latossolo sob cultivo de cana-de-açúcar. (2004) Irriga, 9, pp. 1-11SOUZA, Z.M., MARQUES JÚNIOR, J., PEREIRA, G.T., BARBIERI, D.M., Small relief shape variations influence spatial varaibility of soil chemival attributes (2006) Scientia agricola, 63, pp. 161-168SOUZA, Z.M., MARQUES JÚNIOR, J., PEREIRA, G.T., Variabilidade espacial da estabilidade de agregados e matéria orgânica em solos de relevos diferentes. (2004) Pesquisa Agropecuária Brasileira, 39, pp. 491-499SOUZA, Z.M., MARQUES JÚNIOR, J., PEREIRA, G.T., BENTO, M.J.C., Variabilidade espacial de atributos físicos de um Latossolo Vermelho sob cultivo de cana-de-açúcar. (2004) Revista Brasileira de Engenharia Agrícola e Ambiental, 8, pp. 51-58STOLF, R., Teoria e teste experimental de fórmulas de transformação dos dados de penetrômetro de impacto em resistência do solo. (1991) Revista Brasileira de Ciência do Solo, 15, pp. 229-235XU, M., QI, Y., Soil-surface CO 2 efflux and its spatial and temporal variations in a young ponderosa pine plantation in northern California (2001) Global Change Biology, 7, pp. 667-677YOO, G., SPOMIER, L.A., WANDER, M.M., Regulation of carbon mineralization rates by soil structure and water in an agricultural field and a prairie-like soil (2006) Geoderma, 135, pp. 16-25ZAR, J.H., (1999) Biostatistical analysis, , 4 ed. Upper Saddle River: Prentice Hall, 718

Validation of alternative microbiological methods: an overview.

Validação de métodos microbiológicos alternativos: uma visão geral

Formulação de uma solução estabilizante para estocagem de um imunossensor eletroquímico para detecção de Salmonella sp.

A especificidade e seletividade envolvida na interação antígeno-anticorpo é amplamente explorada, principalmente na composição de kits para detecção de patógenos da área da saúde e, mais recentemente, para o desenvolvimento de imunossensores. Contudo, nos estudos até aqui desenvolvidos, observa-se uma lacuna no que se refere ao armazenamento desses dispositivos, sendo comum nos laboratórios de pesquisa a montagem do sistema seguida imediata-mente da análise. Em razão da ausência de soluções estabilizantes comerciais para imunossensores, considerando-se fins de transferência de tecnologia e comer-cialização, que abrange a questão de produção, armazenamento, distribuição e responsabilidade de entrega de um produto em condições ideais para a realização das análises, é importante estabelecer uma condição de estocagem do dispositivo (eletrodos) onde está imobilizado o componente biológico. Nessa perspectiva, foi formulada uma solução estabilizante para o armazenamento de um imunossensor eletroquímico para detecção de Salmonella sp.bitstream/item/215437/1/CT-266.pd

Cashew-apple (Anacardium occidentale L.) and yacon (Smallanthus sonchifolius) functional beverage improve the diabetic state in rats.

Made available in DSpace on 2018-05-10T01:03:33Z (GMT). No. of bitstreams: 1 ART15041.pdf: 458582 bytes, checksum: c37cc3142f2c7b8ec6cba8b8889769ed (MD5) Previous issue date: 2016-02-22bitstream/item/139789/1/ART15041.pd

Integração de métodos multicritério na busca da sustentabilidade agrícola para a produção de tomates no município de São José de Ubá-RJ.

Este estudo discute alternativas para os sistemas produtivos da terra no plantio de tomates em São José de Ubá-RJ e as relações de trabalho passíveis de serem colocadas em pratica de forma a promover uma agricultura sustentavel na região, priorizando os aspectos economicos, ambientais e culturais do problema. A introdução da questão cultural aumenta a complexidade da questão, sendo necessário o uso de uma metodologia capaz de lidar com toda a subjetividade envolvida nesse processo de tomada de decisão. O estudo visa contribuir para a conquista de um processo sustentavel na região, estabelecendo um processo de tomada de decisão pautado nas opinioes do agricultor, respeitando principalmente as questões culturais do problema. As características do ambiente de tomada de decisão indicaram o uso de uma combinação de métodos de apoio a decisão multicritério - MACBETH e VIP Analysis - para a seleção da melhor alternativa capaz de possibilitar o alcance dos objetivos propostos

The football is medicine plaform-scientific evidence, large-scale implementation of evidence-based concepts and future perspectives

The idea that football can be used as therapy and as a high-intensity and literally breath-taking training regime goes back centuries. To take one prominent example, the French philosopher Voltaire describes in the Book of Fate (1747), how a patient is cured by playing with a sacred football: “… full-blown and carefully covered with the softest Leather. You must kick this Bladder, Sir, once a Day about your Hall for a whole Hour together, with all the Vigour and Activity you possibly can”, “Ogul, upon making the first Experiment, was ready to expire for want of Breath”, “In short, our Doctor in about 8 days Time, performed an absolute Cure. His Patient was as brisk, active and gay, as One in the Bloom of his Youth.”1 Today, Voltaire and his main character, philosopher Zadig, have been proved right: Football is indeed a breath-taking activity and it can be used as therapy. Albeit today's recommendations suggest a lower training frequency, longer training periods and encourage group-based training, and say that any football can be applied