direct quench meaning in English

直接淬火

Carotenoids can make chla return from excited state to ground state by direct or un - direct quenching , in order to prevent algae from photooxidation . on the other hand , it was indicated that polysaccharides have functions in resisting uv . spirulina plalensis can accumulate both cellular and extracellular polysaccharides during uv treatment , it showed highest uv resistant ability ; nanochloropsis sp also can accumulate cellular polysaccharides , while extracellular polysaccharides reduced ; the cellular polysaccharides content of phaeocystis globosa scherffel decreased and extracellular polysaccharides content did not increased markedly , showing lowest uv resistant ability
钝顶螺旋藻和微绿球藻中在较低的uv辐射强度下类胡萝卜素含量升高，而叶绿素a保持相对稳定，说明类胡萝卜素可能对藻类起到一定保护作用，可能通过直接的或间接的方式猝灭激发态的叶绿素，来保障光合作用的进行；本实验发现多糖的累积和分泌与藻体的抗uv能力有相关，钝顶螺旋藻的细胞内和细胞外多糖分泌旺盛，其抗uv能力最强；微绿球藻体内能积累多糖，而胞外多糖分泌减少；球形棕囊藻的胞内多糖含量减少，胞外多糖含量增加也不明显，其抗uv能力最弱。