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5,870 Newest Publications about the topic molecular weight

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Purification and Characterization of Carbonic Anhydrase from Ağrı Balık Lake Trout Gill (Salmo trutta labrax) and Effects of Sulfonamides on Enzyme Activity

26-10-2014 | Ramazan Demirdag, Veysal Comakli, Muslum Kuzu, Emrah Yerlikaya, Murat Şentürk, Journal of Biochemical and Molecular Toxicology, 2014

ABSTRACT Carbonic anhydrase (CA) was purified from Ağrı Balık Lake trout gill (fCA) by affinity chromatography on a sepharose 4B‐tyrosine‐sulfanilamide column. The fCA enzyme was purified with about a 303.9 purification factor, a specific activity 4130.4 EU (mg‐protein)–1, and a yield of 79.3 ...

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Facile and Scalable Preparation of Pure and Dense DNA Origami Solutions

24-10-2014 | Evi Stahl, Thomas G. Martin, Florian Praetorius, Hendrik Dietz, Angewandte Chemie International Edition, 2014

Abstract DNA has become a prime material for assembling complex three‐dimensional objects that promise utility in various areas of application. However, achieving user‐defined goals with DNA objects has been hampered by the difficulty to prepare them at arbitrary concentrations and in ...

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Dielectric and Viscoelastic Behavior of Star-Branched Polyisoprene: Two Coarse-Grained Length Scales in Dynamic Tube Dilation

24-10-2014 | Yumi Matsumiya; Yuichi Masubuchi; Tadashi Inoue; Osamu Urakawa; Chen-Yang Liu; Evelyne van Ruymbeke; Hiroshi Watanabe, Macromolecules, 2014

cis-Polyisoprene (PI) chain has the type A dipole parallel along the backbone so that its large-scale (global) motion results in not only viscoelastic but also dielectric relaxation. Utilizing this feature of PI, this paper examined dielectric and viscoelastic behavior of star PI probe chains ...

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Conformational Properties of a Polymer in an Ionic Liquid: Computer Simulations and Integral Equation Theory of a Coarse-Grained Model

24-10-2014 | Eunsong Choi; Arun Yethiraj, Journal of Physical Chemistry B, 2014

We study the conformational properties of polymers in room temperature ionic liquids using theory and simulations of a coarse-grained model. Atomistic simulations have shown that single poly(ethylene oxide) (PEO) molecules in the ionic liquid 1-butyl 3-methyl imidazolium tetrafluoroborate ...

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Synthesis and structure control of l‐lactic acid–glycolic acid copolymer by homo‐copolymerization

23-10-2014 | Huihui Yin, Rui Wang, Huan Ge, Xiuqin Zhang, Zhiguo Zhu, Journal of Applied Polymer Science, 2014

ABSTRACT A two‐step direct melt copolymerization process of l‐lactic acid (L‐LA)/glycolic acid (GA) was developed: poly(l‐lactic acid) (PLLA) and poly(glycolic acid) (PGA) with different molecular weight was first synthesized respectively by binary catalyst (tin chloride/p‐toluenesulfonic or ...

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Copolymerization and Cycloaddition Products Derived from Coupling Reactions of 1,2-Epoxy-4-cyclohexene and Carbon Dioxide. Postpolymerization Functionalization via Thiol–Ene Click Reactions

23-10-2014 | Donald J. Darensbourg; Wan-Chun Chung; Christopher J. Arp; Fu-Te Tsai; Samuel J. Kyran, Macromolecules, 2014

The coupling reaction of 1,2-epoxy-4-cyclohexene with CO2 in the presence of a ZnCl2/nBu4NI catalyst system was shown to provide the naturally occurring cis-cyclohexadiene carbonate. An alternative synthesis of this compound, which was characterized by X-ray structural analysis, was carried out ...

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ATRP of POSS Monomers Revisited: Toward High-Molecular Weight Methacrylate–POSS (Co)Polymers

23-10-2014 | Vladimír Raus; Eva Čadová; Larisa Starovoytova; Miroslav Janata, Macromolecules, 2014

For the first time, ATRP was successfully employed for homopolymerization of a commercial methacrylate-functionalized polyhedral oligomeric silsesquioxane (POSS) monomer, iBuPOSSMA, to high molecular weights. It was found that iBuPOSSMA has a low ceiling temperature (Tc); therefore, low ...

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Synthesis and Characterization of Comb and Centipede Multigraft Copolymers PnBA-g-PS with High Molecular Weight Using Miniemulsion Polymerization

23-10-2014 | Wenwen Wang; Weiyu Wang; Xinyi Lu; Sachin Bobade; Jihua Chen; Nam-Goo Kang; Qiuyu Zhang; Jimmy Mays, Macromolecules, 2014

Comb and centipede multigraft copolymers, poly(n-butyl acrylate)-g-polystyrene (PnBA-g-PS) with PnBA backbones and PS side chains, were synthesized via high-vacuum anionic polymerization and miniemulsion polymerization. Single-tailed and double-tailed PS macromonomers were synthesized by anionic ...

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Controlling Porosity in Lignin‐Derived Nanoporous Carbon for Supercapacitor Applications

23-10-2014 | Ju‐Won Jeon, Libing Zhang, Jodie L. Lutkenhaus, Dhrubojyoti D. Laskar, John P. Lemmon, Daiwon Choi, Manjula I. Nanda ..., ChemSusChem, 2014

Abstract Low‐cost renewable lignin has been used as a precursor to produce porous carbons. However, to date, it has not been easy to obtain high surface area porous carbon without activation processes or templating agents. Here, we demonstrate that low molecular weight lignin yields highly ...

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67/68Ga-Labeling Agent That Liberates 67/68Ga-NOTA-Methionine by Lysosomal Proteolysis of Parental Low Molecular Weight Polypeptides to Reduce Renal Radioactivity Levels

22-10-2014 | Tomoya Uehara; Takemi Rokugawa; Mai Kinoshita; Souki Nemoto; Guerra Gomez Fransisco Lazaro; Hirofumi Hanaoka; Yasush ..., Bioconjugate Chemistry, 2014

The renal localization of gallium-67 or gallium-68 (67/68Ga)-labeled low molecular weight (LMW) probes such as peptides and antibody fragments constitutes a problem in targeted imaging. Wu et al. previously showed that 67Ga-labeled ...

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