... humin rather than precursors or are compounds genetically unrelated to humin . They consider humic acids in ancient sediments nothing more than degradation products of humin . In addition , the authors assume that with geologic age , humin ...
... humin will be de- rived solely from tryptophane , excluding a small but negligible amount of other amino acids , not chemically concerned in humin formation which may be adsorbed on the tryptophane humin . If , however , the hypo ...
... Humin Fraction As commonly defined , the humin fraction is that portion of soil humus that remains behind after extraction of the soil with dilute alkali . The humin fraction may consist of one or more of the following : 1. Humic acids ...
About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work.
... humin were equally striking . The addi- tion of cystine and histidine produces no increase in either in- soluble or soluble humin nitrogen , but the addition of tyrosine and aldehyde ( trioxymethylene ) causes a sharp increase in the ...
... humin fraction has been differentiated into ( a ) acid - insoluble humin , ( b ) acid- soluble " humin , precipitated by calcium hydroxide , and ( c ) " phos- photungstate " humin , precipitated by phosphotungstic acid . With fibrin ...
... Humin Formed by the Acid Hydrolysis of Proteins . III . Hydrolysis in the Presence of Aldehydes . II . Hydrolysis in ... humin fraction has been differentiated into ( a ) " acid - insoluble " humin , ( b ) “ acid- soluble " humin ...
... humin 50.82 5.11 2.88 33.76 1.21 0.498 hydrolyzed humin 57.78 4.72 1.72 0.98 15-20 cm : humic acids 57.53 5.62 2.83 36.54 1.17 0.476 humin 54.70 5.68 3.12 35.83 1.25 0.491 hydrolyzed humin 59.34 4.82 1.87 I 0.975 30-35 cm : humic acids ...