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Imaging of Humic Substance Macromolecular Structures in Water and Soils
Science, 1999Humic substances (HSs) are the natural organic polyelectrolytes formed from the biochemical weathering of plant and animal remains. Their macromolecular structure and chemistry determine their role in biogeochemical processes. In situ spectromicroscopic evidence showed that the HS macromolecular structures (size and shape) vary as a function of HS ...
, Myneni +3 more
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The Crystalline State of Macromolecular Substances
Angewandte Chemie International Edition in English, 1974AbstractUnlike low molecular weight substances, high polymers do not crystallize completely. However long the crystallization process is continued, they still consist of a mixture of crystalline and non crystalline regions. In the undrawn material, these regions form larger units which are known as spherulites.
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Characterization of Water-Soluble Macromolecular Substances in Cloud Water
Journal of Atmospheric Chemistry, 2004In this contribution we present to our knowledge the first investigations of macromolecular, often called humic-like substances (HULIS) in cloud water samples and compare them with water-soluble extracts from atmospheric PM2.5, soils and waters to study its possible origin.
Jinsheng Feng, Detlev Möller
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Chapter 49 Macromolecular substances and plastics
1975Publisher Summary This chapter discusses macromolecular substances and plastics. In industry, gel permeation chromatography (GPC) serves as a method for characterizing and analyzing new polymeric products and for controlling the quality of standard products (Harmon).
M. Kubín, J. Čoupek
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SORPTION AND CHROMATOGRAPHY OF MACROMOLECULAR SUBSTANCES
Russian Chemical Reviews, 1961CONTENTS I. Introduction 612 II. Elution chromatography 613 III. Frontal chromatography 614 IV. New chromatographic methods 615 V. Polyelectrolytes 616 VI.
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Synthesis of Macromolecular Substances by Addition Polymerization
2001As already explained, polymerization reactions can proceed by various mechanisms and can be catalyzed by initiators of different kinds. For addition polymerization of single compounds, initiation of chains may occur via radical, cationic, anionic, or so-called coordinative-acting initiators, but some monomers will not polymerize by more than one ...
Dietrich Braun +2 more
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, 2000 Macromolecular changes of humic substances induced by interaction with organic acids
European Journal of Soil Science, 1996Summary Two different humic materials, one from a forest soil and the other from wormcasts, were used to study the influence of mineral and organic acids on the conformational properties of humic substances. The macromolecular changes were followed by low pressure gel permeation chromatography after titrating ...
PICCOLO A +2 more
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International Journal of Biological Macromolecules
Deep eutectic solvent (DES) is a kind of solvent prepared by mixing hydrogen bond donors and hydrogen bond acceptors, and have become a hot topic in ecological civilization construction due to its low toxicity and sustainability. Its excellent properties such as low volatility, thermal stability and biodegradability make it stand out among many organic
Yuying, Gao +7 more
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Deep eutectic solvent (DES) is a kind of solvent prepared by mixing hydrogen bond donors and hydrogen bond acceptors, and have become a hot topic in ecological civilization construction due to its low toxicity and sustainability. Its excellent properties such as low volatility, thermal stability and biodegradability make it stand out among many organic
Yuying, Gao +7 more
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Urinary Macromolecular-Inhibitory-Substances of Calcium-Oxalate-Monohydrate Crystal Growth
1989It is well known that urinary glycosaminoglycans (GAG) exert inhibitory activity on crystal growth and aggregation. The purpose of this study was to evaluate the inhibitory activity of GAG in a natural form, namely as proteoglycan or glycoprotein.
S. Nishio +4 more
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