CHEMICAL COMPOSITION OF HUMIC ACIDS

Soil Science ◽  
1995 ◽  
Vol 159 (6) ◽  
pp. 391-401 ◽  
Author(s):  
CARMINE AMALFITANO ◽  
ROBINSON A. QUEZADA ◽  
MICHAEL A. WILSON ◽  
JOHN V. HANNA
Keyword(s):  
Chemical Composition ◽  
Humic Acids

Relating Ion Binding by Fulvic and Humic Acids to Chemical Composition and Molecular Size. 2. Metal Binding

2001 ◽  
Vol 35 (12) ◽  
pp. 2512-2517 ◽  
Author(s):  
Iso Christl ◽  
Chris J. Milne ◽  
David G. Kinniburgh ◽  
Ruben Kretzschmar
Keyword(s):  
Chemical Composition ◽  
Humic Acids ◽  
Metal Binding ◽  
Molecular Size ◽  
Ion Binding

Biologically Active Nanomaterials in Potato Growing

2017 ◽  
Vol 13 ◽  
pp. 91-95 ◽  
Author(s):  
Margarita V. Samoylova ◽  
Dmitriy G. Churilov ◽  
Anna A. Nazarova ◽  
Svetlana D. Polishchuk ◽  
Nikolai V. Byshov
Keyword(s):  
Chemical Composition ◽  
Humic Acids ◽  
Physiological Parameters ◽  
Biologically Active ◽  
Cobalt Oxides ◽  
Potato Tubers

The article presents the influence of different nanomaterials such as nanopowders of ferrum, cobalt and cuprum, suspensions of copper and cobalt oxides nanoparticles and ultrafine humic acids on potato breed “Latona”. We have studied the influence of nanomaterials on morphological and physiological parameters of plants, the yield, its structure and chemical composition of potato as well as on vitamins C and PP in potato tubers. On the basis of investigations we have recommended introduction of biologically active nanomaterials into intensive technology of growing the crop.

EFFECT OF THE CHEMICAL COMPOSITION OF SOIL HUMIC ACIDS ON THEIR VISCOSITY, SURFACE PRESSURE, AND MORPHOLOGY

Soil Science ◽  
2002 ◽  
Vol 167 (10) ◽  
pp. 636-651 ◽  
Author(s):  
M. Nègre ◽  
D. Vindrola ◽  
S. Spera ◽  
L. Ferraris ◽  
M. Gennari
Keyword(s):  
Chemical Composition ◽  
Humic Acids ◽  
Surface Pressure ◽  
Soil Humic Acids

Analysis of Structural Features of Humic Acids Fractions after Mechanochemical Modification

2015 ◽  
Vol 1085 ◽  
pp. 3-6 ◽  
Author(s):  
Malika P. Mirzobekzoda ◽  
Elizaveta V. Maltseva ◽  
Natalya S. Shekhovtsova
Keyword(s):  
Chemical Composition ◽  
Ir Spectroscopy ◽  
Humic Acids ◽  
Fulvic Acids ◽  
Structural Features ◽  
Acid Base ◽  
Structural Composition ◽  
Mechanochemical Modification ◽  
The Impact ◽  
First Time

Humic substances are the major components of soil, peat and brown coal. They can be fractionating into fulvic acids (FA), brown humic acids (BHA) and gray humic acids (GHA). In this work we investigated the influence of mechanochemical modifications on structural composition of HAs main fractions using the methods of IR and 1H MRS spectroscopy. The IR spectroscopy results has shown that HA has different chemical composition in comparison with GHA and BHA. Potentiometric titration showed that mechanoactivation (MA) with thiourea increases the amount of oxygen-containing groups up to 2.5. For the first time we studied the impact of modifying agent of thiourea on the structural composition and acid-base properties of HAs major fractions - GHA and BHA during the mechanoactivation process.

The Chemical Composition of Preparations of Humic Acids of Peat Altai Mountain Region

2016 ◽  
pp. 24-34
Author(s):  
Galina V. Larina ◽  
Elena B. Daibova ◽  
Evgeny V. Kaigorodov ◽  
Natalia I. Kosova ◽  
Oleg S. Andrienko
Keyword(s):  
Chemical Composition ◽  
Humic Acids ◽  
Mountain Region ◽  
Altai Mountain
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