Experimental Studies On Cystine
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84% of the wool. This indicates that hydrolysis with dilute hydrochloric acid gives good yields of cystine, but as the mother liquors obtained from dilute acid contain less hydrolyzed wool per volume they tend to retain more cystine in solution after neu- tralization. The advantage of using dil. Hydrochloric acid is that while pushing the wool into the hot acid no strong hydrogen chloride fumes are evolved to burn the hands.
Preparation of Pure Cystine The quantitative yields of pure cystine ob...tained from the crude cystine precipitated by sodium acetate as above were determined.
Two portions of 500 g. Of wool were boiled with 1000 cc. Of cone, hydrochloric acid each, for 6 hours as usual. Sodium acetate sufficient to give a maximum yield of cystine was added. Each washed and dried precipitate was treated as follows. The precipitate was dissolved in 250 cc. Of 1. 8 M (6. 5%) hydrochloric acid, filtered by suction, the in- soluble portion digested with 2 portions of 50 cc. Of hydrochloric acid and filtered.
What to read after Experimental Studies On Cystine?
You can find similar books in the "Read Also" column, or choose other free books by Alice Ranney Thompson Merrill to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
84% of the wool. This indicates that hydrolysis with dilute hydrochloric acid gives good yields of cystine, but as the mother liquors obtained from dilute acid contain less hydrolyzed wool per volume they tend to retain more cystine in solution after neu- tralization. The advantage of using dil. Hydrochloric acid is that while pushing the wool into the hot acid no strong hydrogen chloride fumes are evolved to burn the hands.
Preparation of Pure Cystine The quantitative yields of pure cystine ob...tained from the crude cystine precipitated by sodium acetate as above were determined.
Two portions of 500 g. Of wool were boiled with 1000 cc. Of cone, hydrochloric acid each, for 6 hours as usual. Sodium acetate sufficient to give a maximum yield of cystine was added. Each washed and dried precipitate was treated as follows. The precipitate was dissolved in 250 cc. Of 1. 8 M (6. 5%) hydrochloric acid, filtered by suction, the in- soluble portion digested with 2 portions of 50 cc. Of hydrochloric acid and filtered.
What to read after Experimental Studies On Cystine?
You can find similar books in the "Read Also" column, or choose other free books by Alice Ranney Thompson Merrill to read onlineMoreLess
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