Results 261 to 270 of about 72,853 (343)

Macromolecular drugs acting as precursors of non-macromolecular active substances — Preliminary considerations

open access: closedPharmacological 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.
Paolo Ferruti
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Imaging of Humic Substance Macromolecular Structures in Water and Soils

Science, 1999
Humic 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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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.
Jinsheng Feng, Detlev Möller
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Deep eutectic solvent: Synthesis, classification, properties and application in macromolecular substances

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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Ultrasonic velocity in macromolecular substances

open access: closedJournal of Polymer Science, 1949
G. Natta, M. Baccaredda
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[Effect of macromolecular substances on pharmaceutical availability of a potential local anesthetic].

open access: closedCeska a Slovenska farmacie : casopis Ceske farmaceuticke spolecnosti a Slovenske farmaceuticke spolecnosti, 2000
Within the framework of the study of the derivatives of phenylcarbamic acid with a local anaesthetic effect, one of them, a potential medicinal agent with the working name of XX B, chemically N-[2-(3-heptyloxyphenylcarbamoyloxy)-ethyl]-dimethylammoniumchl oride, was investigated.
E Svehlová
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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, M. SCHNITZER
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Modification of Macromolecular Substances

2012
The 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
Dietrich Braun   +4 more
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