Nutrient Estimation
Mostrando 13-24 de 27 artigos, teses e dissertações.
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13. Resíduo da colheita de eucalipto e fontes de cálcio na agregação do solo e na estabilização da matéria orgânica / Crop residue of eucalyptus and calcium sources on soil aggregation and stabilization of organic matter
The interaction of organic compounds with divalent cations such as calcium (Ca) may improve soil aggregation and polymerise the organic molecules, forming metal-organic complexes more stable. The effectiveness of Ca on the aggregation in forest soils, in field conditions, and the influence of different sources of Ca in decomposing residues of eucalyptus and
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/07/2010
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14. MODELAGEM INDIVIDUAL E EM TEMPO REAL DAS EXIGÊNCIAS NUTRICIONAIS DE SUÍNOS EM CRESCIMENTO / MODELING INDIVIDUAL AND IN REAL TIME OF THE NUTRIENT REQUIREMENTS FOR GROWTH PIGS
Two studies were realized with the objective (i) to describe and to establish the limitations of the empirical and factorial methods used to estimate nutritional requirements and (ii) develop a mathematic model able to estimate the daily nutrient requirements of individual pigs in real time. For this purpose, in the first study a systematic analysis was carr
Publicado em: 2010
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15. Dinâmica das formas dissolvidas de nitrogênio e carbono em microbacias da Mata Atlântica no município de Ubatuba (SP) / Dynamics of dissolved forms of nitrogen and carbon in small watersheds of the Atlantic Forest, at Ubatuba - Brazil
Based on the fact that streams water quality reflects the conditions of the landscape, the objectives of this study were: to investigate nitrogen (N), carbon (C) and major ions dynamics in six streams covered by Atlantic Forest; and assess the impacts of the human activities over the biogeochemistry of two urban streams at same region. Since this study is pa
Publicado em: 2008
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16. Net energy evaluation of feeds and determination of net energy requirements for pigs
Feeds for pigs can be attributed different energy values according to, first, the step considered in energy utilization (DE: digestible energy, ME: metabolizable energy and NE: net energy) and, second, the method used for estimation at each step. Reference methods for evaluating DE content are based on in vivo digestibility measurements; indirect estimates o
Revista Brasileira de Zootecnia. Publicado em: 2007-07
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17. INFLUÊNCIA DA TEMPERATURA, SALINIDADE E NUTRIENTES DISSOLVIDOS (N e P) NO CULTIVO DE MICROALGAS DE ÁGUA ESTUARINA E COSTEIRA. / INFLUÊNCIA DA TEMPERATURA, SALINIDADE E NUTRIENTES DISSOLVIDOS (N e P) NO CULTIVO DE MICROALGAS DE ÁGUA ESTUARINA E COSTEIRA.
The development of commercial microencapsulated food has contributed to the feeding management of crustacean, mussel and fish larvae. However, the use of microalgae in natura is still essential for the high quality production of cultivated organisms. Microalgae have been employed not only in direct feeding but also indirectly, as for zooplankton production a
Publicado em: 2007
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18. Balance nutricional y número de hojas como variables de predicción del rendimiento del plátano Hartón
The objective of this work was to develop a regression equation for yield estimation of the Horn plantain crop (Musa AAB subgroup platano cv. Horn), with the relationship between the Nutrient Balance Indexes (DRIS-NBI) (X1) and the number of leaves of the plant (X2). Totally at random, 398 foliar samples were collected. The regression equation developed is Y
Pesquisa Agropecuária Brasileira. Publicado em: 2005-02
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19. Eucalyptus sp. in function of nutrient status and soil fertility in three regions of the state of São Paulo, Brazil. / Produtividade do Eucalyptus sp. em função do estado nutricional e da fertilidade do solo em diferentes regiões do Estado de São Paulo.
Eucalyptus sp. stands, in the state of São Paulo, Brazil, present some nutrient limitations that can implicate growth and sustainability of the forests in the future. It happens because of high nutrient exportation during timber harvesting and also because of the low soil fertility and insufficient use of fertilizers in these areas. Through classic methodol
Publicado em: 2002
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20. Estimating Nutrient Intake From a Food Frequency Questionnaire: Incorporating the Elements of Race and Geographic Region
Assignment of nutrient values to food frequency questionnaire (FFQ) items does not usually account for participant characteristics (besides age or sex) that may influence eating patterns. For the Southern Community Cohort Study, the authors developed and assessed results from a nutrient database system incorporating sex-, race-, and census-region-specific fo
Oxford University Press.
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21. Viability of Indigenous Soil Bacteria Assayed by Respiratory Activity and Growth
The bacterial population in barley field soil was estimated by determining the numbers of (i) cells reducing the artificial electron acceptor 5-cyano-2,3-ditolyl tetrazolium chloride (CTC) to CTC-formazan (respiratory activity), (ii) cells dividing a limited number of times (microcolony formation) on nutrient-poor media, (iii) cells dividing many times (colo
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22. Estimation of Osmotic Gradients in Soybean Sieve Tubes by Quantitative Autoradiography: Qualified Support for the MÜnch Hypothesis 1
An attempt was made to evaluate Münch's hypothesis of osmotically generated pressure flow in soybean (Glycine max L.) sieve tubes from velocity measurements and calculations of pressure potentials and sieve tube resistances. Pressure potential was estimated from values for water potentials and osmotic potential. Leaf water potential measurements were made b
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23. A Combined Model To Predict the Functionality of the Bacteriocin-Producing Lactobacillus sakei Strain CTC 494
The use of bacteriocin-producing lactic acid bacteria for improved food fermentation processes seems promising. However, lack of fundamental knowledge about the functionality of bacteriocin-producing strains under food fermentation conditions hampers their industrial use. Predictive microbiology or a mathematical estimation of microbial behavior in food ecos
American Society for Microbiology.
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24. Formation of Root Epidermal Transfer Cells in Plantago.
The root ultrastructure and transmembrane electron transport activities of two Plantago species have been examined with respect to alterations in response to Fe deficiency, exogenously supplied auxin, and the presence of chromium in the external medium. Both species showed increased ferric reductase activity upon Fe starvation, but they differed in the maxim