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Archives of Biochemistry and Biophysics, 1967 Some of the next articles are maybe not open access.
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Modification of Macromolecular Substances
2012The term “modification of macromolecular substances” is used for chemical and physical processes that are carried out after the actual synthesis, i.e., on the finished macromolecule. Chemical modifications are, for example, the conversion of ester side groups to hydroxy groups, chemical degradation and crosslinking reactions. Physical modifications are
Helmut Ritter +4 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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Macromolecular changes of humic substances induced by interaction with organic acids
European Journal of Soil Science, 1996SummaryTwo 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 humic material to low pHs with acids.
PICCOLO A +2 more
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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).
J. Čoupek, M. Kubín
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Pharmacological Research Communications, 1975
Summary Some principles at the basis of the potential interest of macromolecular drugs are defined. The main lines of a research on purposely tailored synthetic high polymers acting as precursors of non-macromolecular active substances are given. The chemical aspects of proper design of these polymers are discussed in detail.
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Summary Some principles at the basis of the potential interest of macromolecular drugs are defined. The main lines of a research on purposely tailored synthetic high polymers acting as precursors of non-macromolecular active substances are given. The chemical aspects of proper design of these polymers are discussed in detail.
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On the mechanism of collapse of monolayers of macromolecular substances II. Cellulose acetate
Journal of Colloid and Interface Science, 1980Abstract The phenomenon of collapse of monolayers of cellulose acetate, describable according to the Prout-Tompkins law, that is as a phenomenon of nucleation and growth with interference during growth, was studied. Ellipsometric measurements and measurements made by optical and electronic microscopy confirm the above mechanism.
Piero Baglioni +2 more
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Macromolecular material (humic substance) in the water column and sediments
Marine Chemistry, 1992Abstract The progress during the past 10–15 years in the studies of organic macromolecules (humic substances, HS) in seawater and sediments is reviewed. The review describes the advances in the characterization of seawater and sedimentary HS, HS formation models, studies on the geochemical role of marine HS, and future research needs.
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Microvascular Research, 1980
Abstract Bradykinin (0.8 μg base/min) infused locally intraarterially into canine forelimbs perfused at constant inflow causes marked increases in lymph flow rate and lymph total protein concentration. This same dose of bradykinin infused locally intraarterially for 60 min into forelimbs perfused at constant inflow with vasopressin (0.8 P.U./min) or ...
Bhagavan S. Jandhyala +2 more
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Abstract Bradykinin (0.8 μg base/min) infused locally intraarterially into canine forelimbs perfused at constant inflow causes marked increases in lymph flow rate and lymph total protein concentration. This same dose of bradykinin infused locally intraarterially for 60 min into forelimbs perfused at constant inflow with vasopressin (0.8 P.U./min) or ...
Bhagavan S. Jandhyala +2 more
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Modes of Absorption of Macromolecular Substances
1995When we speak about absorption of macromolecular substances we must take into consideration the barriers of the gastrointestinal tract which hinder their uptake and transportation into the lymphatics and the blood. These barriers can be differentiated into morphological and functional barriers.
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