排序方式: 共有1条查询结果,搜索用时 31 毫秒
1
1.
Phytases produced by numerous microorganisms and plants degrade phytic acid that has chelated with metal ions in food and
feed. It is important to study phytase for the role of metal ions in nutrition of animals and humans as wellas in the reduction
of organic phosphate content of a queous environment. This article reports on solid-state fermentation of phytase from a new
substrate of cassava dregs. Large quantities of cassava dregs are produced in tropical areas as a by product of cassava starch
processing. Protein and inorganic salts were found to be low in cassava dregs. Cassava dregs could be employed for phytase
synthesis after the addition of a nitrogen source and mineral salts. Ammonium nitrate was the best nitrogen source among the
nitrogen sources investigated, including beef extract, yeast extract, urea, ammonium nitrate, sodium nitrate, and ammonium
sulfate. Sodium dodecyl sulfate promoted phytase production from cassava dregs. A maximum phytase yield of 6.73 U/g of dry
mass was obtained. The obtained phytase was stable at feed-processing temperature, since 70% of initial enzyme activity was
maintained after 30 min of treatment at 75°C. 相似文献
1