Results 211 to 220 of about 11,355 (259)

Humic Substances and Plant Nutrition

1995
Since the studies by Liebig (1856), it is well known that plants, as long as they are adequately supplied with light and mineral nutrients, can live in the absence of the organic and inorganic structural components of the soil. Nowadays the use of hydroponics is popular not only among plant physiologists but also in certain commercial activities.
VARANINI, Zeno, R. PINTON
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Involvement of humic substances in regrowth

International Journal of Food Microbiology, 2004
There appear to be interactions in the distribution system that complicate the ability to use AOC/BDOC as an independent assessment of regrowth potential. Two such complications are the limitation of the assays themselves and the potential interaction between the organic carbon concentration with the presence of disinfectants and pipe materials.
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On the nature of humic substances

Eurasian Soil Science, 2015
It is argued that the isolation of low-molecular-weight compounds from humic substances does not prove their supramolecular nature, because small molecules can be sorbed on macromolecules by interacting with them due to noncovalent bonds. The relative mobility of molecular segments in humic substances has been proposed to be used as a criterion for the
G. N. Fedotov, S. A. Shoba
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THE SUPRAMOLECULAR STRUCTURE OF HUMIC SUBSTANCES

Soil Science, 2001
The scientific understanding of the molecular size and shape of humic substances (HS) is critically reviewed. The traditional view that HS are polymers in soil is not substantiated by any direct evidence but is assumed only on the basis of laboratory experiments with model molecules and ...
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Humic Substances

Chemistry International -- Newsmagazine for IUPAC, 2008
J. Lag, Amos Hadas, Rhodes W. Fairbridge, J. C. Nóvoa Muñoz, X. Pontevedra Pombal, A. Martínez Cortizas, Gonzalo Almendros   +6 more
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Humic substances

Environmental Science & Technology, 1982
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THE PRINCIPLES OF HUMIC SUBSTANCES

Soil Science, 2001
Two principles are presented that define the molecular nature and ecological role of humic substances (HS). The First Principle (i) accounts for and organizes an extensive body of apparently disparate data relating to the inability to purify and establish a molecular structure for HS; (ii) offers a conceptual framework for dealing with HS and for ...
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HUMIC SUBSTANCES AND HUMIFICATION

2000
Ziechman, W., Hübner, M., Jonassen, K.E.N., Batsberg, W., Nielsen, T., Hahner, S., Hansen, Poul Erik; id_orcid 0000-0003-4751-9910, Gudmundsson, Anne-Lise Rørbech   +7 more
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Effect of humic substances on the anaerobic digestion of secondary sludge in wastewater treatment plants: a review

Environmental Chemistry Letters, 2023
Zhenyao Wang, Carol Sze Ki Lin, Qilin Wang   +2 more
exaly  

Aquatic Humic Substances

1985
This chapter discusses the amount and nature of aquatic humic substances in all types of natural waters. The chapter contains thirteen major divisions and is the largest chapter. The major divisions include: early studies of aquatic humus, overview of isolation procedures, amount of humic substances in water, elemental composition of aquatic humus ...
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