{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/83633"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/83633","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Phytase and 1(alpha)-Hydroxycholecalciferol: Their Role in Improving Nutrient Bioavailability in Chickens and Pigs","abstract":"The mechanism by which hydroxylated vitamin D$\\sb3$ compounds improve mineral utilization in chickens was evaluated using a variety of methodologies. In chicks fed vitamin D$\\sb3$-adequate and P-deficient diets, supplemental 1$\\alpha$-OH D$\\sb3$ was unable to improve nonphytate-P utilization ($P<0.05$). In another assay, duodenal mucosal cells from chicks fed P-deficient diets, with or without supplemental 1$\\alpha$-OH D$\\sb3$, 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 determine the role of microbially-produced phytase in the response to hydroxylated vitamin D$\\sb3$ compounds. Bone ash responses to 1$\\alpha$-OH D$\\sb3$ and phytase supplementation were nearly identical in both cecectomized and sham-operated birds, indicating an insignificant role of the cecal microflora in the phytate-P releasing activity of 1$\\alpha$-OH D$\\sb3$. In conclusion, the marked phytate-P releasing capacity of dietary 1$\\alpha$-OH D$\\sb3$ and 1,25-(OH)$\\sb2$ D$\\sb3$ is apparently not caused by increased intestinal phytase activity.","abstract_html":"The mechanism by which hydroxylated vitamin D$\\sb3$ compounds improve mineral utilization in chickens was evaluated using a variety of methodologies. In chicks fed vitamin D$\\sb3$-adequate and P-deficient diets, supplemental 1<span class=\"etd-inline-math\">&alpha;</span>-OH D$\\sb3$ was unable to improve nonphytate-P utilization ($P&lt;0.05$). In another assay, duodenal mucosal cells from chicks fed P-deficient diets, with or without supplemental 1<span class=\"etd-inline-math\">&alpha;</span>-OH D$\\sb3$, were obtained and analyzed for intestinal phytase activity. Chicks fed supplemental 1<span class=\"etd-inline-math\">&alpha;</span>-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 determine the role of microbially-produced phytase in the response to hydroxylated vitamin D$\\sb3$ compounds. Bone ash responses to 1<span class=\"etd-inline-math\">&alpha;</span>-OH D$\\sb3$ and phytase supplementation were nearly identical in both cecectomized and sham-operated birds, indicating an insignificant role of the cecal microflora in the phytate-P releasing activity of 1<span class=\"etd-inline-math\">&alpha;</span>-OH D$\\sb3$. In conclusion, the marked phytate-P releasing capacity of dietary 1<span class=\"etd-inline-math\">&alpha;</span>-OH D$\\sb3$ and 1,25-(OH)$\\sb2$ D$\\sb3$ is apparently not caused by increased intestinal phytase activity.","abstract_has_math":true,"creators":["Biehl, Robert Richard"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Animal Sciences","degree_department":null,"school":null,"contributors":["Baker, David H."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T21:08:32Z","date_published":"2015-09-25T21:08:32Z","updated_at":"2026-07-22T22:26:21Z","subjects":["Agriculture, Food Science and Technology"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI9737052"],"render_values":[{"text":"(MiAaPQ)AAI9737052","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/83633","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Baker, David H."]},{"key":"dc:creator","label":"Author","values":["Biehl, Robert Richard"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T21:08:32Z","10000-01-01","1997"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Animal Sciences"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Agriculture, Food Science and Technology"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/83633","(MiAaPQ)AAI9737052"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The mechanism by which hydroxylated vitamin D$\\sb3$ compounds improve mineral utilization in chickens was evaluated using a variety of methodologies. In chicks fed vitamin D$\\sb3$-adequate and P-deficient diets, supplemental 1$\\alpha$-OH D$\\sb3$ was unable to improve nonphytate-P utilization ($P<0.05$). In another assay, duodenal mucosal cells from chicks fed P-deficient diets, with or without supplemental 1$\\alpha$-OH D$\\sb3$, 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 determine the role of microbially-produced phytase in the response to hydroxylated vitamin D$\\sb3$ compounds. Bone ash responses to 1$\\alpha$-OH D$\\sb3$ and phytase supplementation were nearly identical in both cecectomized and sham-operated birds, indicating an insignificant role of the cecal microflora in the phytate-P releasing activity of 1$\\alpha$-OH D$\\sb3$. In conclusion, the marked phytate-P releasing capacity of dietary 1$\\alpha$-OH D$\\sb3$ and 1,25-(OH)$\\sb2$ D$\\sb3$ is apparently not caused by increased intestinal phytase activity.","Made available in DSpace on 2015-09-25T21:08:32Z (GMT). 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In chicks fed vitamin D$\\sb3$-adequate and P-deficient diets, supplemental 1$\\alpha$-OH D$\\sb3$ was unable to improve nonphytate-P utilization ($P<0.05$). In another assay, duodenal mucosal cells from chicks fed P-deficient diets, with or without supplemental 1$\\alpha$-OH D$\\sb3$, 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 determine the role of microbially-produced phytase in the response to hydroxylated vitamin D$\\sb3$ compounds. Bone ash responses to 1$\\alpha$-OH D$\\sb3$ and phytase supplementation were nearly identical in both cecectomized and sham-operated birds, indicating an insignificant role of the cecal microflora in the phytate-P releasing activity of 1$\\alpha$-OH D$\\sb3$. In conclusion, the marked phytate-P releasing capacity of dietary 1$\\alpha$-OH D$\\sb3$ and 1,25-(OH)$\\sb2$ D$\\sb3$ is apparently not caused by increased intestinal phytase activity.","Made available in DSpace on 2015-09-25T21:08:32Z (GMT). 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