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文献和实验Isolation and Selection of New Astaxanthin Producing Strains of Xanthophyllomyces dendrorhous
Astaxanthin is a xanthophyll pigment of high economic value for its use as a feeding component in aquaculture. Xanthophyllomyces dendrorhous is a basidiomycetous fungi able to synthesize astaxanthin as its major carotenoid, and the only known
Metabolic Engineering of Mucor circinelloides for Zeaxanthin Production
hydroxylase and ketolase, allowing this yeast to produce the xanthophyll called astaxanthin. Here we describe the fermentation of X. dendrorhous in astaxanthin producing conditions to purify mRNA for the cloning of the cDNA from the crtS gene by RT
淀粉和支链淀粉的未知样品,与碘显色后,只要在选定的波长λ1 ,λ 2 , λ 3 ,λ 4 ,处作 4 次比色,利用直链淀粉和支链淀粉标准曲线即可分别求出样品中两类淀粉的含量。三、仪器、试剂和材料1. 仪器(1) 电子分析天平(2 )索氏脂肪抽提器 1 套(3 )分光光度计 1 台(4 ) pH 计(5 )容量瓶 100ml X 2 , 50ml X 16(6 )吸管 0.5ml X 1, 2ml X 1, 5ml X 12. 试剂( 1) 乙醚或石油醚(沸程 30-60 ℃)(2 )无水
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