نتایج جستجو برای: ionic polymerization
تعداد نتایج: 75735 فیلتر نتایج به سال:
The term ‘Enzyme’ came from the Greek word ‘Enzymos’ means ‘In the cells or Ferments’. These are naturally available, high molecular weight proteins, capable of catalyzing chemical reaction of biological process and therefore popular as ‘Biocatalyst’. Enzymes are soluble organic substance, produced by living organisms whose different amino acids form long poly peptide chains (-HN-R-CONH-R-CO-)n...
A new concept for formation of nanostructured intrinsically conducting polymers (ICP) is demonstrated. Polypyrrole can be electropolymerized from an ionic-surfactant-solution in TiO(2) nanotube framework to form a geometrical structure of self-organized nanopore arrays. Polymerization is initialized selectively in the space between nanotube walls forming a mechanically stable polymer network wi...
The Front Cover (designed by Rika Mizoguchi) shows a Metal Ionic Liquid fertilizer catalyzing the growth of perfectly alternating copolymers various epoxides and cyclic anhydrides, represented as growing vines. In their Research Article, M. E. Fieser co-workers explore combination rare earth metal trichloride salts with phosphonium chloride ionic liquid to form metal-containing liquids. These l...
Poly (ionic liquid)/TiO 2 composite particles were fabricated using a facile one-pot synthesis method, in which the polymerization of ionic liquid monomer and hydrolysis precursor for TiO proceeded one system. The morphological properties observed by scanning electron microscope transmission microscope. chemical physical structures analyzed Fourier infrared spectrometer an X-ray diffractometer,...
The function of myosin A in the acceleration of actin polymerization was first observed by Laki and Clark (1) who noted the catalytic effect of myosin A. Martonosi and Gouvea (2) used a light scattering method to demonstrate that an enzymically active fragment of myosin A, heavy meromyosin, prepared by tryptic digestion, also accelerated the actin polymerization. Yagi and Sakakibara (3) have sh...
Porous organic polymers (POPs) are widely used in various areas such as adsorption, separation and catalysis. In the present work, ionic liquid-modified porous (IL-POPs) synthesized by dispersion polymerization were applied to immobilize metallocene catalysts for olefin polymerization. The prepared IL-POPs characterized Fourier transform infrared spectrometer (FT-IR), nitrogen sorption porosime...
Comparison of the rates of polymerization catalyzed by DNA polymerases in the presence of a limited and a complete complement of the four deoxynucleoside triphosphates permits accurate measurement of the processivity of polymerization. The extent of processivity, Le. the number of nucleotides polymerized each time the DNA polymerase associates with the DNA template, may be measured in a range f...
Mono-divalent ion exchange in isolated cell walls of Nitella flexilis (L.) Ag. induces a marked loss of wall polymers and a decrease in the wall cationic exchange capacity. These data correlate with the replacement in the walls of adsorbed Mn(2+) by Na(+) ions. Boiling wall samples in methanol for 1 h or keeping the ionic solutions chilled to 4 degrees C does not inhibit the cell wall polymer l...
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