factor 420

Lead tin fluorophosphates (PTFP) glass doped with organic dye stilbene 420 is prepared.

制备了掺杂有机染料芪420的铅锡氟磷酸盐杂化闪烁玻璃(lead tin fluorophosphates,简记为PTFP),测量其玻璃转变温度为75℃,染料在玻璃中的荧光发射峰位为446nm。

A laccase gene (lacD) from the basidiomycete Trametes sp.

栓菌420(Trametes sp。

Warm compaction technics of 420 stainless steel powder;

420不锈钢粉末温压成形工艺

The results show as follows: Test groups which proportion is 1:1 is stronger than any others in proving coenzyme F_(420) concentration and maintaining the normal anaerobic fermentation pH value; comparing the gas production, proportions radio which are 1:1、1.

结果表明,接种物与原料比例(w/w)为1:1的试验组在提高发酵液中辅酶F_(420)浓度、维持厌氧发酵正常pH值的能力明显比其它试验组强;从产气量上比较,1:1、1。