马铃薯蛋白的分离及氨基酸组成分析

为了从马铃薯淀粉加工分离汁水中回收具有天然活性的蛋白,以Amberlite XAD7HP树脂作为吸附剂对扩张床吸附进行研究,并分析回收蛋白的氨基酸组成。结果表明:XAD7HP可以实现Patatin蛋白和蛋白酶抑制剂的分离,分离到的马铃薯蛋白酶抑制剂的胰蛋白酶抑制活力为410 mg/g。回收的马铃薯蛋白酶抑制剂Ser、Leu、Glu的含量分别为13.2、9.14、8.14 g/100 g,且必需氨基酸占总氨基酸的40.80%,疏水氨基酸Ile、Leu、Val、Phe和Tyr的含量也比较高。

Amine formylation with CO2 and H2 catalyzed by heterogeneous Pd/PAL catalyst

For the first time, Pd supported on natural palygorskite was developed for amine formylation with CO2 and H2. Both secondary and primary amines with diverse structures could be converted into the desired formamides at < 100 °C, and good to excellent yields were obtained.