scholarly journals Ultrasonic Scission of Deoxyribonucleic Acid in Aqueous Solution III. The Solution Properties of Sonicated Low Molecular Weight Samples as Revealed by Light Scattering and Viscosity

1987 ◽  
Vol 19 (12) ◽  
pp. 1385-1394 ◽  
Author(s):  
Kiyohiro Fukudome ◽  
Kiwamu Yamaoka ◽  
Hiroshi Ochiai
Keyword(s):  
Aqueous Solution ◽  
Molecular Weight ◽  
Light Scattering ◽  
Deoxyribonucleic Acid ◽  
Low Molecular Weight ◽  
Solution Properties

scholarly journals Aggregation of Modified Celluloses in Aqueous Solution: Transition from Methylcellulose to Hydroxypropylmethylcellulose Solution Properties Induced by a Low-Molecular-Weight Oxyethylene Additive

Langmuir ◽  
2012 ◽  
Vol 28 (38) ◽  
pp. 13562-13569 ◽  
Author(s):  
Rasmus Bodvik ◽  
Leif Karlson ◽  
Katarina Edwards ◽  
Jonny Eriksson ◽  
Esben Thormann ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Molecular Weight ◽  
Low Molecular Weight ◽  
Solution Properties

scholarly journals Low Molecular Weight Gelators Based on Functionalized l-Dopa Promote Organogels Formation

Gels ◽  
2019 ◽  
Vol 5 (2) ◽  
pp. 27 ◽  
Author(s):  
Demetra Giuri ◽  
Nicola Zanna ◽  
Claudia Tomasini
Keyword(s):  
Aqueous Solution ◽  
Molecular Weight ◽  
Rheological Properties ◽  
Rhodamine B ◽  
Lauric Acid ◽  
Water Solution ◽  
Preliminary Test ◽  
Low Molecular Weight ◽  
Coupling Reactions ◽  
Low Molecular Weight Gelators

We prepared the small pseudopeptide Lau-l-Dopa(OBn)2-d-Oxd-OBn (Lau = lauric acid; l-Dopa = l-3,4-dihydroxyphenylalanine; d-Oxd = (4R,5S)-4-methyl-5-carboxyl-oxazolidin-2-one; Bn = benzyl) through a number of coupling reactions between lauric acid, protected l-Dopa and d-Oxd with an excellent overall yield. The ability of the product to form supramolecular organogels has been tested with different organic solvents of increasing polarity and compared with the results obtained with the small pseudopeptide Fmoc-l-Dopa(OBn)2-d-Oxd-OBn. The mechanical and rheological properties of the organogels demonstrated solvent-dependent properties, with a storage modulus of 82 kPa for the ethanol organogel. Finally, to have a preliminary test of the organogels’ ability to adsorb pollutants, we treated a sample of the ethanol organogel with an aqueous solution of Rhodamine B (RhB) for 24 h. The water solution slowly lost its pink color, which became trapped in the organogel.

scholarly journals Deoxyribonucleic acid polymerases of Euglena gracilis. Purification and properties of two distinct deoxyribonucleic acid polymerases of high molecular weight

1975 ◽  
Vol 151 (2) ◽  
pp. 227-238 ◽  
Author(s):  
A G McLennan ◽  
H M Keir
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Euglena Gracilis ◽  
Deoxyribonucleic Acid ◽  
Deae Cellulose ◽  
Low Molecular Weight ◽  
Optimum Conditions ◽  
Electrophoretic Mobilities ◽  
Substrate Activation ◽  
Purification And Properties

Two DNA polymerases of high molecular weight, pol A (mol.wt. 190 000) and pol B (mol.wt. 240 ooo), have been purified 6300-fold and 1600-fold respectively from an extramitochondrial supernatant of a bleached strain of Euglena gracilis. They have very similar requirements when assayed with an ‘activated’-DNA primer-template [the optimum conditions of pH and ionic (K+ and Mn2+) composition being 7.2, 25 mM and 0.2 mM respectively]. 0.2 mM-Mn2+ was about 1.5-2-fold as effective as 2 mM-Mg2+, owing to substrate activation by deoxyribonucleoside 5′-triphosphates in the presence of Mn2+. Km values for the triphosphates in the absence of activation were about 10(-6)M with Mn2+ and 8 × 10(-6) M with Mg2+ for both enzymes. They were inhibited to the same extent by N-ethylmaleimide, novobiocin and o-phenanthroline, but differed in their chromatographic behaviour on DEAE-cellulose and in their electrophoretic mobilities on polyacrylamide gel. No evidence was found for the existence in these cells of a DNA polymerase of low molecular weight, but there were indications that a third enzyme of high molecular weight might exist.

Supramolecular Structures of Low-Molecular-Weight Polybutadienes, as Studied by Dynamic Light Scattering, NMR and Infrared Spectroscopy

2001 ◽  
Vol 34 (26) ◽  
pp. 9023-9031 ◽  
Author(s):  
Jiří Podešva ◽  
Jiří Dybal ◽  
Jiří Spěváček ◽  
Petr Štěpánek ◽  
Peter Černoch
Keyword(s):  
Molecular Weight ◽  
Infrared Spectroscopy ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Supramolecular Structures ◽  
Low Molecular Weight

Dynamical studies on low molecular weight polyacrylamide aqueous solution

Polymer ◽  
1985 ◽  
Vol 26 (3) ◽  
pp. 397-405 ◽  
Author(s):  
Michel Duval ◽  
Jeanne François ◽  
Dominique Sarazin
Keyword(s):  
Aqueous Solution ◽  
Molecular Weight ◽  
Low Molecular Weight
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