Results 11 to 20 of about 1,678,407 (282)

Molecular Characteristics and Antioxidant Activity of Spruce (Picea abies) Hemicelluloses Isolated by Catalytic Oxidative Delignification

open access: yesMolecules, 2022
Spruce (Piceaabies) wood hemicelluloses have been obtained by the noncatalytic and catalytic oxidative delignification in the acetic acid-water-hydrogen peroxide medium in a processing time of 3–4 h and temperatures of 90–100 °C. In the catalytic process,
Valentina S. Borovkova   +12 more
doaj   +1 more source

Molecular Weight Distribution of Proteins Synthesized in Single, Identified Neurons of Aplysia [PDF]

open access: yes, 1971
Parietovisceral ganglia from Aplysia californica were incubated in medium containing leucine-3H. Single, identified nerve cell somas were isolated from the ganglia, and their proteins extracted and separated by electrophoresis on 5% SDS-polyacrylamide ...
Wilson, David L.
core   +4 more sources

Die Fraktionierung von Polymethylmethacrylaten nach dem Molekulargewicht durch Gegenstromverteilung

open access: yesCHIMIA, 1973
A polydisperse sample of polymethylmethacrylate with an average molecular weight of 168000 has been fractionated by countercurrent distribution into fractions of different molecular weight using a phase pair prepared from acetone, n-hexane and water.
P. von Tavel, J. Wälchli, H. Rüfenacht
doaj   +1 more source

Physicochemical Properties of ACE Inhibitory Peptides from Jujube Kernel by Enzymatic Method

open access: yesShipin gongye ke-ji, 2022
In this study, the defatted jujube kernel residue was extracted by alkali solubilization and acid seperation method to obtain jujube kernel protein, and the angiotensin converting enzyme (ACE) inhibitory peptide was obtained by enzymatic hydrolysis of ...
Liming TAN   +4 more
doaj   +1 more source

Linear Rheological Response of a Series of Densely Branched Brush Polymers [PDF]

open access: yes, 2011
We have examined the linear rheological responses of a series of welldefined, dense, regularly branched brush polymers. These narrow molecular weight distribution brush polymers had polynorobornene backbones with degrees of polymerization (DP) of 200 ...
Grubbs, Robert H.   +4 more
core   +1 more source

Alargamento da distribuição de massa molar de polímeros sintetizados com catalisadores metalocênicos dual-site Broadening of molecular weight distribution of polymers synthesized by metallocene-based dual-site catalysts

open access: yesQuímica Nova, 2008
The main topics related to the use of dual-site catalysts in the production of polymers with broad molecular weight distribution are reviewed. The polymerization using dual-site catalysts is more economical and allows to produce a higher quality product ...
João H. Z. dos Santos   +3 more
doaj   +1 more source

A Comparative Study between FRP and ATRP of Styrene by Monte Carlo Simulation: Effect of Free Radical Mobility [PDF]

open access: yesعلوم و تکنولوژی پلیمر, 2010
Styrene polymerization through FRP and ATRP methods was carried out at 110oC, while in-depth studies were performed by Monte Carlo simulation.The changes in monomer conversion, initiator concentration, average molecular weight, and polydispersity index ...
M. Najafi   +3 more
doaj   +1 more source

Optimization of Preparation Process of Antioxidant Peptides in the Visceral Mass of Cucumaria frondosa by Response Surface Methodology and Its Composition Analysis

open access: yesShipin gongye ke-ji, 2022
Using the protein of Cucumaria frondosa visceral mass as raw material, antio-xidant peptides were prepared by enzymatic hydrolysis with complex protease.
Yunlong GAO, Menghao XU, Xiangzhong ZHAO
doaj   +1 more source

Rheological measurement of molecular weight distribution of polymers

open access: yese-Polymers, 2013
This paper has described a method to obtain the molecular weight distribution (MWD) of polymeric materials from their rheological data. The method has been developed for linear polymers with log normal molecular weight distribution.
Khak Maryam, Ramazani Ahmad
doaj   +1 more source

The application of HP-GFC chromatographic method for the analysis of oligosaccharides in bioactive complexes [PDF]

open access: yesHemijska Industrija, 2009
The aim of this work was to optimize a GFC method for the analysis of bioactive metal (Cu, Co and Fe) complexes with olygosaccharides (dextran and pullulan). Bioactive metal complexes with olygosaccharides were synthesized by original procedure.
Savić Ivan   +3 more
doaj   +1 more source

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