Results 191 to 200 of about 2,713 (253)
SORPTION AND CHROMATOGRAPHY OF MACROMOLECULAR SUBSTANCES [PDF]
Russian Chemical Reviews, 1961 CONTENTS I. Introduction 612 II. Elution chromatography 613 III. Frontal chromatography 614 IV. New chromatographic methods 615 V. Polyelectrolytes 616 VI.
G. V. Samsonov
openaire +2 more sources
MACROMOLECULAR STRUCTURES OF HUMIC SUBSTANCES
Soil Science, 1980 ABSTRACTWe investigated humic substances by surface pressure and viscosity measurements at different pHs and neutral salt concentrations to elucidate their macromolecular configurations. We observed that such configurations were not unique; they varied with the changes in the medium.
Kunal Ghosh, Morris Schnitzer
openaire +3 more sources
Characterization of Water-Soluble Macromolecular Substances in Cloud Water
Journal of Atmospheric Chemistry, 2004 In 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.
Detlev Möller +2 more
openaire +3 more sources
Synthesis of Macromolecular Substances by Addition Polymerization
, 2001 As 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 ...
Helmut Ritter +2 more
openaire +3 more sources
A new phenomenon in flow birefringence of solutions of macromolecular substances
Journal of Polymer Science, 1953 AbstractMeasurements on flow birefringence of solutions of polyvinyl chloride in cyclohexanone revealed that the angle of orientation increases with decreasing concentration of the solution. That this surprising effect was not due to constructional or experimental errors was demonstrated by results obtained with polystyrene, which were in agreement ...
D. J. Coumou, W. Boog, E. J. Arlman
openaire +3 more sources
Affinity Chromatography of Macromolecular Substances on Adsorbents Bearing Carbohydrate Ligands
, 1981 Publisher Summary This chapter provides information on the methods for preparing affinity adsorbents having carbohydrate ligands and illustrates the use of these adsorbents for the purification of representative, macromolecular substances. Affinity chromatography is possible because of the stereospecific interactions that can occur between the ...
John H. Pazur
openaire +4 more sources
Soil Science, 2001 The commonly accepted polymeric nature of humic substances is still a matter of debate. In this work, both humic matter of different origin and undisputed neutral (polysaccharides) and negatively charged (polystyrenesulphonates) polymers of known molecular weight were studied by high performance size exclusion chromatography after dissolution in mobile
PICCOLO, ALESSANDRO, CONTE, COZZOLINO
+6 more sources
Biochemical Pharmacology, 1962 Mice of the O20 (Amsterdam) strain were intraperitoneally injected with the macromolecular substances dextran and polyvinylpyrrolidone. Quantitative determinations were made of the amounts of these substances stored in the liver and spleen. It appeared that only a very limited amount of the injected quantity of the macromolecular substances was stored.
A. E. F. H. Meijer
openaire +3 more sources
Electric adsorption isotherms of macromolecular substances. 1. Communication [PDF]
Die Makromolekulare Chemie, 1958 Bahga Hanna
openaire +2 more sources
A method for determining the distribution of molecular weights in macromolecular substances
Transactions of the Faraday Society, 1937 H. Mark, H. Dostal
openaire +3 more sources