苍井そら无码av,四lll少妇bbbb搡bbbb,亚洲丁香五月天,亚洲悠悠色综合中文字幕

英國Oxoid*胰蛋白胨
蛋白胨是酪蛋白的胰消化。它可用于在任何制定胰腺或胰蛋白酶消化酪蛋白中。酪蛋白是牛奶的主要蛋白質(zhì)是氨基酸態(tài)氮的豐富來源
 

英國Oxoid*胰蛋白胨

Code: LP0042

Tryptone is a pancreatic digest of casein. It can be used in any formulation where a pancreatic or tryptic digest of casein is specified. Casein is the main protein of milk and is a rich source of amino acid nitrogen. The profile shows a broad spread of peaks throughout the molecular weight range characteristic of a pancreatic digest. This hydrolysate is often mentioned in published works, either as a constituent of culture media for metabolic or growth studies, or for other purposes where high performance and uniformity of composition are of paramount importance. It has a high tryptophan content and is therefore used in media for testing the indole reaction.
Tryptone can detect `flat-sour’ or `sulphide’ spoilage organisms in the canning industry and is also used in sterility testing media.
It is a constituent of media used in fermentation processes to produce antibiotics, extra-cellular protein, interferon and diphtheria toxoid.