The delimitation of stands within ecotons generally gives on difficulties.在群落交错区范围内,通常划定群落片段的边界并不太困难.The matter of delimitation needs the two countries to negotiate. It can't be decided unilaterally.划界的事还需两国商量, 并不是任...
赤藓糖醇属于填充型甜味剂, 口感清凉,热量低, 安全性高.Erythritol is a kind of adding sweetener, with lower heat, cool feeling and food safety.利用细胞融合技术获得了一株高产赤藓糖醇的融合株RH-UV-L4-F9,其发酵能力强,赤藓糖醇产量高.The fusant RH - UV - L 4 - F 9 which attained by cell...
Object : To observe the oxygen derived free radicals scavenging of diterpenoid tanshinones by pyrogallol autoxidation systems.目的: 探讨丹参二萜醌对邻苯三酚自氧化反应产生的氧自由基的作用.Reaction mechanism of liquid phase autoxidation of O - nitroto...