Effects of Grafting Density and Molecular Weight on the Temperature-Dependent Conformational Change of Poly(N-isopropylacrylamide) Grafted Chains in Water

2006 ◽  
Vol 39 (9) ◽  
pp. 3420-3426 ◽  
Author(s):  
H. Yim ◽  
M. S. Kent ◽  
S. Mendez ◽  
G. P. Lopez ◽  
S. Satija ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Conformational Change ◽  
Temperature Dependent ◽  
Grafting Density

scholarly journals Temperature-dependent conformational change affecting Tyr11 and sweetness loops of brazzein

2013 ◽  
Vol 81 (6) ◽  
pp. 919-925 ◽  
Author(s):  
Claudia C. Cornilescu ◽  
Gabriel Cornilescu ◽  
Hongyu Rao ◽  
Sarah F. Porter ◽  
Marco Tonelli ◽  
...  
Keyword(s):  
Conformational Change ◽  
Temperature Dependent

Temperature dependent measurements on a low-molecular-weight photorefractive glass

2002 ◽  
Author(s):  
Ralf Bausinger ◽  
Andre Leopold ◽  
Stephan J. Zilker ◽  
Dietrich Haarer ◽  
Jolita Ostrauskaite ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Low Molecular Weight ◽  
Temperature Dependent

Molecular Weight Induced Conformational Change and Its Impact on β-Phase Formation of Polydiarylfluorene in Dilute Solution

2020 ◽  
Vol 124 (11) ◽  
pp. 6304-6310 ◽  
Author(s):  
Masaru Nagai ◽  
Jie Liu ◽  
Wei Huang ◽  
Moriya Kikuchi ◽  
Seigou Kawaguchi ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Conformational Change ◽  
Phase Formation ◽  
Dilute Solution ◽  
Β Phase

Possible Mechanisms for the Increase in Alkaline Phosphatase Activity of Lyophilized Control Material

1972 ◽  
Vol 18 (12) ◽  
pp. 1518-1523 ◽  
Author(s):  
Alistair F Smith ◽  
Barbara A Fogg
Keyword(s):  
Molecular Weight ◽  
Alkaline Phosphatase ◽  
Phosphatase Activity ◽  
Alkaline Phosphatase Activity ◽  
Gel Filtration ◽  
Low Molecular Weight ◽  
Temperature Dependent ◽  
Control Material ◽  
Rate Of Increase ◽  
Control Procedures

Abstract The increased alkaline phosphatase (EC 3.1.3.1) activity of reconstituted lyophilized control sera has recently been the focus of considerable interest because of its possible implications for quality-control procedures. We confirm that these reconstituted materials show a temperature-dependent increase in alkaline phosphatase activity, but could show no alteration in activity of fresh sera. The rate of increase in activity was unaffected by dialysis of the reconstituted material, and occurred more rapidly in dilute solutions. Studies with acrylamide gel electrophoresis and Sephadex G-200 gel filtration showed that, immediately after reconstitution, a high-molecular-weight alkaline phosphatase component predominated; during subsequent spontaneous activation this component decreased, and there was a concomitant increase in a low-molecular-weight alkaline phosphatase component. The results obtained when the reconstituted material was extracted with butanol suggest that the observed changes in alkaline phosphatase activity may be attributed to the breakdown of a complex between alkaline phosphatase and lipoprotein.

Solubility of Antioxidants in Rubber

1996 ◽  
Vol 69 (5) ◽  
pp. 885-896 ◽  
Author(s):  
S. A. Pushpa ◽  
P. Goonetilleke ◽  
N. C. Billingham
Keyword(s):  
Molecular Weight ◽  
Melting Point ◽  
General Rule ◽  
Low Density Polyethylene ◽  
Phenolic Antioxidants ◽  
Low Density ◽  
Temperature Dependent

Abstract Solubilities of seven phenolic antioxidants in rubber and three antioxidants in low density polyethylene (LDPE) were measured at temperatures ranging trom 40°C–100°C. The antioxidants are more soluble in rubber than in LDPE, which is semicrystalline. The solubility of antioxidants is temperature dependent and both the melting point of the additive and its interactions with the polymer are important in determining solubility. As a general rule, solubility decreases with increasing molecular weight.

Preparation of Polymer Brushes by Surface-Initiated ARGET ATRP

2013 ◽  
Vol 791-793 ◽  
pp. 208-211 ◽  
Author(s):  
Xiao Meng Chu ◽  
Shao Jie Liu ◽  
Hui Jiao Yang ◽  
Feng Qing Zhao
Keyword(s):  
Molecular Weight ◽  
Silicon Dioxide ◽  
Polymer Brushes ◽  
Polymer Brush ◽  
Surface Modifications ◽  
Organic Substrate ◽  
Research Progress ◽  
Grafting Density ◽  
Arget Atrp ◽  
Inorganic Substrate

This paper firstly summarized the latest research progress on the polymer brushes preparation by surface-initiated ARGET ATRP polymerization. It mainly includes the surface modifications of inorganic substrate (silicon dioxide and carbon nanotubes), and the organic substrate (cellulose and polymer microspheres). This method needs less catalyst and operates more easily, compared to the classical ATRP. Besides, it also has good polymerization controllability, and the polymer brushes have higher grafting density and molecular weight. Therefore, surface-initiated ARGET ATRP polymerization has become an effective method for modifying the surface of materials. Then, we prepared the polymer brush supported TEMPO by the surface-initiated ARGET ATRP and characterized.

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