Phytases
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Supplementation of fungal and/or bacterial phytase in broiler diets formulated with reduced phosphorus level and different calcium contents
ABSTRACT The objective of the current study was to evaluate the effects of three calcium:available phosphorus (Ca:aP) ratios and different supplementation with phytases from different origins on performance and ash, Ca, and P contents in the tibia of broilers. A total of 900 male broilers (22 to 35 days old) were fed ten dietary treatments in a completely ra
R. Bras. Zootec.. Publicado em: 08/11/2018
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2. Isolation, morphological and molecular characterization of phytate-hydrolysing fungi by 18S rDNA sequence analysis
Phytate is the primary storage form of phosphate in plants. Monogastric animals like poultry, pigs and fishes have very low or no phytase activities in their digestive tracts therefore, are incapable to efficiently utilize phytate phosphorus from the feed. Phytase from microbial sources are supplemented to feedstuff of these to increase the uptake of phytate
Braz. J. Microbiol.. Publicado em: 07/05/2013
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3. Effect of ph and temperature on the activity of phytase products used in broiler nutrition
The activity of three commercial microbial phytase (Aspergillus oryzae, A. niger, and Saccharomyces cerevisae) products used in broiler nutrition was determined at different pH (2.0 to 9.0) and temperature (20 to 90°C) values. Enzymatic activity was determined according to the reaction of the phytase with its substrate (sodium phytate), in four replicates,
Rev. Bras. Cienc. Avic.. Publicado em: 2012-09
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4. Produção e caracterização bioquímica de fitases de Rhizopus stolonifer e Aspergillus niger UFV-1 e suas aplicações em ração animal / Production and biochemical characterization of phytases from Rhizopus stolonifer and Aspergillus niger UFV-1 and its applications in animal feed
Neste trabalho, duas cepas fúngicas isoladas da castanha macadâmia e de bagaço de cana-de-açúcar foram avaliadas quanto ao potencial para produção de fitases, visando aplicação em processos biotecnológicos, principalmente em rações animais. O fungo Rhizopus stolonifer, isolado a partir da macadâmia, foi cultivado em meio líquido contendo infus�
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/09/2011
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5. Produção, caracterização bioquímica e purificação de fitase produzida por Aspergillus niger var. phoenicis URM 4924.
During ripening, vegetable seeds and grain accumulated substantial amount of phytic acid, representing over 60% of total phosphorus in them. Phytate acts as an energy source for seed germination and is rarely available for non-ruminants, since they do not synthesize the enzyme. Due to the unavailability of biological organic phosphorus in many vegetable food
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/2011
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6. Chromobacterium sp. from the tropics: detection and diversity of phytase activity
Phytases are a group of enzymes that catalyze phytic acid hydrolysis with release of phosphorus (P). The ability of Chromobacterium sp. to produce phytase was detected in 115 out of 118 candidate bacteria isolated from different Brazilian biomas. This is the first report revealing the genus Chromobacterium as phytase producer.
Brazilian Journal of Microbiology. Publicado em: 2011-03
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7. Diversidade genética, antagonismo microbiano e produção de fitases por bactérias endofíticas de folhas de feijoeiro comum (Phaseolus vulgaris) / Genetic diversity, microbial antagonism and production of phytases by endophytic bacteria from leaves of common bean (Phaseolus vulgaris)
O feijão é uma das leguminosas mais importantes para a alimentação humana e pouco se conhece sobre as bactérias endofíticas associadas com as folhas desta planta. Objetivou-se com este trabalho: (i) caracterizar as bactérias endofíticas cultiváveis das folhas do feijoeiro comum (Phaseolus vulgaris) de três cultivares diferentes (Vermelhinho, Talism
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/10/2010
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8. Lowering of phytic acid content by enhancement of phytase and acid phosphatase activities during sunflower germination
O objetivo deste trabalho foi investigar a germinação de girassóis híbridos BRS 191 e C11 com finalidade de reduzir o teor de AF e aumentar as atividades de phytases e fosfatases endógenas. A concentração do AF nos aquênios de girassóis híbridos variou de 2,16 a 2,83 g /100g de amostra (p< 0,005). As atividades de fitases e fosfatases de girassóis
Brazilian Archives of Biology and Technology. Publicado em: 2010-08
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9. Activity of microbial phytases in different conditions of storage, pH, temperature and thermic processes / Atividade de fitases microbianas em diferentes condiÃÃes de armazenamento, pH, temperatura e processamento tÃrmico
O uso de fitase na nutriÃÃo das aves à cada vez mais frequente e promissor. Entretanto, hà vÃrias fitases disponÃveis no mercado e poucos estudos cientÃficos sobre a influÃncia da forma e tempo de armazenamento, pH, temperatura e processamento tÃrmico na atividade da enzima em questÃo. Portanto, este experimento foi realizado com trÃs fitases de d
Publicado em: 2009
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10. Bacterial phytase: potential application, in vivo function and regulation of its synthesis
The stepwise release of phosphate from phytate, the major storage form of phosphate in plant seeds and pollen, is initiated by a class of enzymes that have been collectively called phytases. The classification is solely due to the in vitro capability of these enzymes to accept phytate as a substrate. Phytases have been studied intensively in recent years bec
Brazilian Journal of Microbiology. Publicado em: 2004-06
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11. Biophysical Characterization of Fungal Phytases (myo-Inositol Hexakisphosphate Phosphohydrolases): Molecular Size, Glycosylation Pattern, and Engineering of Proteolytic Resistance
Phytases (myo-inositol hexakisphosphate phosphohydrolases) are found naturally in plants and microorganisms, particularly fungi. Interest in these enzymes has been stimulated by the fact that phytase supplements increase the availability of phosphorus in pig and poultry feed and thereby reduce environmental pollution due to excess phosphate excretion in area
American Society for Microbiology.
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12. Expression, Gene Cloning, and Characterization of Five Novel Phytases from Four Basidiomycete Fungi: Peniophora lycii, Agrocybe pediades, a Ceriporia sp., and Trametes pubescens
Phytases catalyze the hydrolysis of phosphomonoester bonds of phytate (myo-inositol hexakisphosphate), thereby creating lower forms of myo-inositol phosphates and inorganic phosphate. In this study, cDNA expression libraries were constructed from four basidiomycete fungi (Peniophora lycii, Agrocybe pediades, a Ceriporia sp., and Trametes pubescens) and scree
American Society for Microbiology.