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Showing 1 to 14 of 14 for “"phytase activity"”.
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Measurement of Phytase Activity in a Clymer Forest Soil Using the TInsP5 Probe
Measurement of soil phytase activity (PA) and delineation of the impact of this important phosphomonoesterase on the P-cycling process in soil and sediments suffer from the lack of a reliable assay. A method for measuring PA in soil that promises to be accurate and reliable has been recently …
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An in vitro assessment of the effects of feed-grade trace minerals on commercial phytase activity
Exogenous phytases have the capacity to increase the nutritional value of animal feeds through the hydrolysis of phytate-bound phosphorus. Inorganic trace minerals (ITM) routinely added to feed can negatively impact phytase activity. Recent research has shown that replacement of ITMs with organic …
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Phytase and 1(alpha)-Hydroxycholecalciferol: Their Role in Improving Nutrient Bioavailability in Chickens and Pigs
… were obtained and analyzed for intestinal phytase activity. Chicks fed supplemental 1$\alpha$-OH D$\sb3$ had significantly higher bone ash values ($P0.10$) the specific activity of intestinal phytase in the duodenal mucosal tissue of chicks. Cecectomized chicks also were utilized to …
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Starch Digestion and Phosphorus Excretion in Lactating Dairy Cows
… (P) source on P partitioning and ruminal phytase activity were evaluated in eight lactating cows (113 DIM). Four cows were ruminaly cannulated. Cows were randomly assigned to treatments in a duplicated 4x4 Latin square with four, 18-d periods. Diets included dry ground corn (DG) or steam …
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Isolation and Characterization of Soybean Genes Involved in Phytic Acid Metabolism: Phytase and 1-L-myo-Inositol-1-Phosphate Synthase
… to improve phosphorus utilization. A soybean phytase from germinated cotyledons was purified 28,000-fold to apparent homogeneity and was determined to be a glycosylated homodimer with 70 kD subunits. Soybean phytase preferred phytate as substrate (Km = 60 mM) and was capable of removing of all …
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Application of microbial phytase and its influencing factors in vivo and in vitro
… conducted in vivo to investigate the efficacy of phytase in improving the availability of phytate P as influenced by dietary Ca:total P (tP) ratios for pigs, broilers, and turkey poults. In pigs and poultry, microbial phytase was effective in improving performance, P and Ca digestibility, bone …
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Phytate Extraction and Stimulation of Phytase by Zn & Mg in Seeds
… effects of zinc and magnesium on stimulation of phytase in seeds were determined by comparing the quantity of substrate (phytate) with that of the control group.</p> <p>The method for analyzing the phytate content was based on dry weight. After phytic acid was extracted by hot HCl, ferric phytate …
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STRUCTURE-FUNCTION STUDIES OF MULTIPLE INOSITOL POLYPHOSPHATE PHOSPHATASES FROM GUT COMMENSAL BACTERIA
… storage form of phosphorous in animal feeds. Phytases are enzymes (myo-inositol hexakisphosphate phosphohydrolases) that break down InsP6 by hydrolysis to release inorganic phosphate. Non-ruminant animals do not produce phytases needed to digest dietary InsP6, instead relying on enzymes …
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Quantification and alleviation of the antinutritional effects of phytate on poultry
… has focussed on the development of exogenous phytase enzymes capable of releasing phytate phosphorus for absorption, thus reducing the environmental impact of poultry production and requirements for costly dietary inorganic P supplementation. The absolute adoption of this strategy has, …
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Supplementing microbial phytase to diets for swine and poultry
… conducted to determine the efficacy of Natuphos® phytase for improving the bioavailabilities of phytate P and other nutrients (CP, AA, Ca, and Zn) bound to phytate in the diets for pigs, broilers, and turkey poults, and to evaluate P and Zn equivalency values of phytase. In a 5-wk study with young …
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Quantifying the Effects of Microbial Phytase and Diet Acidity on Ca and P Utilization by Weanling Pigs
… (Exp. 2 and 3) equivalency values of microbial phytase based on performance, rib mineralization and P and Ca digestibility estimates, and to investigate the possible interactions of phytase and citric acid (Exp. 4 and 5). In Exp. 1, adding phytase to low P diets linearly increased ADG (P < …
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The nutritional value of hybrid rye fed to growing pigs
… cereal grain; the first contained no microbial phytase, and the second contained 1,000 units of microbial phytase per kg of diet. Among the diets that did not include microbial phytase, one hybrid of rye had greater (P < 0.05) STTD of P than wheat, corn, and sorghum. Among the diets containing …
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Improvement in the cooking and physico-chemical characteristics of hard-to-cook cowpeas by pre-conditioning and micronization
… in phytic acid content and an increase in phytase activity. According to the “phytate-divalent cations-pectins” theory, at adverse storage conditions, phytase probably hydrolysed phytate to release divalent cations which migrated to the middle lamella to bind with pectins, reducing their …
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The interaction of dietary phosphorus and exogenous phytase concentrations on nutrient metabolism of beef cattle
… for nonruminants is the dietary addition of phytase, an enzyme that releases P bound to phytate, making it more available for absorption (Lei et al., 1993; Ravindran et al., 2000; Jongbloed et al., 2004). The microbial population in the rumen produces phytases; however, passage rate, …