Molecular weight distribution of humic acids from lake and marine sediments
نویسندگان
چکیده
منابع مشابه
Dynamics in composition and size-class distribution of humic substances in profundal sediments of Lake Constance
Organic matter from profundal lake sediments was fractionated and analyzed with high depth resolution, and the size-class distribution of humic substances was determined by gel-permeation chromatography. Together with a depthdependent increase of the thermal stability of the organic matter and an increasing C/N atomic ratio of the humic acids, the size-distribution patterns of dierent fraction...
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Isoleucine, one of several amino acids isolated from a suite of welldated deep-sea cores, shows a progressive increase in the degree of racemization with the age of the sediment. Amino acids in sediments show an initial rate of racemization almost an order of magnitude faster than the rate observed for free amino acids at a comparable pH and temperature. The observed kinetics depend on a variet...
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متن کاملdistribution and fractions of phosphorus and nitrogen in surface sediments from dianchi lake, china
dianchi lake is one of the most three seriously eutrophic lakes in china. in the present study, the phosphorus (p) and nitrogen (n) fractions in 37 surface sediments samples collected in the dianchi lake were investigated. the total phophorus (tp) in sediments was divided into two parts: inorganic p (ip) and residual p (res-p). the results showed that the total phosphorus content in surface sed...
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ژورنال
عنوان ژورنال: GEOCHEMICAL JOURNAL
سال: 1971
ISSN: 0016-7002
DOI: 10.2343/geochemj.5.121