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RNA molecular weight determinations by gel electrophoresis under denaturing conditions, a critical reexamination.

Biochemistry, 1977
RNA molecular weight measurements were carried out by gel electrophoresis under four different denaturing conditions including 99% formamide, 10 mM methyl mercury, 2.2 M formaldehyde, and 6 M urea at pH 3.8.
H. Lehrach   +3 more
semanticscholar   +1 more source

On the molecular weight of myosin

Biochimica et Biophysica Acta, 1958
Abstract By the Archibald approach to sedmentation equilibrium method, we have found a molecular weight of 4.2ยท10 5 g for either, (I) myosin (A) or, (2) the principal, ( ca . 65% by weight), schlieren-visible component of 5-h extracted myosin B. This same value has also been estimated from the conventional sedimentation velocity-diffusion method ...
Pearl Appel   +3 more
openaire   +3 more sources

Small molecular weight organic thin-film photodetectors and solar cells

, 2003
In this review, we discuss the physics underlying the operation of single and multiple heterojunction, vacuum-deposited organic solar cells based on small molecular weight thin films.
P. Peumans, A. Yakimov, S. Forrest
semanticscholar   +1 more source

Molecular weight and molecular weight distribution

1993
Since the achievement of the physical properties characteristic of high polymers depends critically on molecular weight, it is most important to be able to define and measure this quantity. In this chapter definitions are taken up and basic concepts illustrated, largely by the example of step polymerization.
Paul J. Phillips, Richard H. Boyd
openaire   +2 more sources

Changes in Light Absorptivity of Molecular Weight Separated Brown Carbon Due to Photolytic Aging.

Environmental Science and Technology, 2017
Brown carbon (BrC) consists of those organic compounds in atmospheric aerosols that absorb solar radiation and may play an important role in planetary radiative forcing and climate. However, little is known about the production and loss mechanisms of BrC
J. Wong, A. Nenes, R. Weber
semanticscholar   +1 more source

Direct Synthesis of Functionalized High-Molecular-Weight Polyethylene by Copolymerization of Ethylene with Polar Monomers.

Angewandte Chemie, 2016
The introduction of even a small amount of polar functional groups into polyolefins could excise great control over important material properties. As the most direct and economic strategy, the transition-metal-catalyzed copolymerization of olefins with ...
Shengyu Dai, Changle Chen
semanticscholar   +1 more source

Determination of Molecular Weights and Molecular Weight Distribution of Polyacrylamides

SPE Annual Technical Conference and Exhibition, 1984
ABSTRACT A high-performance, size-exclusion chromatography procedure has been developed for determining molecular weights and molecular weight distributions of polyacrylamides. The procedure can be applied to dry or emulsion polyacrylamides. Virgin polymers and polymers passed through Berea sandstone cores can be analyzed. The analytical
openaire   +2 more sources

Molecular Weight and Molecular Weight Distribution of Kraft Lignins

MRS Proceedings, 1990
ABSTRACTKraft lignins are the lignin degradation products from kraft pulping. They are complex, heterogeneous polymers with some polar character. The molecular weight of kraft lignins greatly affect the physical properties of black liquors, and are of primary importance in separation from black liquor and in evaluating potential uses.Several purified ...
Arthur L. Fricke   +2 more
openaire   +2 more sources

Low-molecular-weight carbon nitrides for solar hydrogen evolution.

Journal of the American Chemical Society, 2015
This work focuses on the control of the polymerization process for melon ("graphitic carbon nitride"), with the aim of improving its photocatalytic activity intrinsically. We demonstrate here that reduction of the synthesis temperature leads to a mixture
V. W. Lau   +5 more
semanticscholar   +1 more source

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