cover image: The Indian Journal of Agricultural Science  June 1951

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The Indian Journal of Agricultural Science June 1951

1951

From a similarity in the distribution of nitrogen in the hydorolysates of purified humic acids and of typical proteins Hobson and Page [1932] concluded that the nitrogen in humic acid is present in the form of proteins. [...] of the solution The results show that with the age of the alkali-extract the nitrogen contents of the phosphotungstic acid fraction gradually diminished but that of the neutraliztion precipitate simultaneously increased the total nitrogen contents of the two fractions however remaining practically the same throughout. [...] In order to obtain further knowledge of the nature of the non-humic nitrogen compounds the filtrate obtained after separtion of the neutralization precipitate in the above experiments was hydrolysed by boiling with hydrochloric acid and the distribution of nitrogen in the hydrolsates was studied according to Van Slyke's method of protein analysis (1911-12 1915). [...] It was found that there is an inverse relationship between the nitrogen in the neutralization precipitate (precipitate formed on neutralizing the acid solution) and that brought down by phosphotungstic acid from the filtrate therefrom ; with the age of the alkali extract there is a progressive increase of the former with a simultaneous decrease of the latter the total nitrogen content of the two [...] Hydrolysis with boiling hydrochloric acid and a study of the distribution of the nitrogen in the hydrolysates have shown the occurrence of the following copounds in the non-humic fraction—ammonia free amino compounds amide protein derivatives and non-amino compounds.
agriculture environment
Pages
105
Published in
India
SARF Document ID
sarf.120213
Segment Pages Author Actions
Cover
i-ii unknown view
The Nature of the Organic Nitrogen Compounds of Rice Soils
77-92 P.K. De, M.B. Mukherjee view
Trace Elements in Some Indian Grasses Forage Crops Concentrates and Mineral Supplements
93-96 N.P. Datta, N.R. Biswas view
Manganese Status of Some Indian Soils
97-108 T.D. Biswas view
Mutation in Gram (Cicer Arietinum)
109-112 R. Balasubrahmanyan view
Co-Ordinated Manurial Trials on Rainfed Cotton in Peninsular India
113-i V.G. Panse, V.B. Sahasrabudhe, V.K. Mokashi view
Some Studies in the Preservation of Fruits and Vegetables
137-154 Lal Singh, Girdhari Lal, T.S. Sadasivan, Nagina Jain view
Descriptions of New and Records of Known Chalcidoidea (Parasitic Hymenoptera) from India
155-178 S.P. Bhatnagar view

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