Layered double hydroxide (LDH) organo-modified by a surface-active monomer, 3-sulfopropyl methacrylate (SPMA) was used as filler for polystyrene (PS). Different nanocomposites SPMA/LDH:PS were prepared by bulk polymerization process using low amount of initiator. The two components, filler and polymer, as well as the degree dispersion of the reactive filler as a function of its loading in PS we...

The copper(I) complexes of diphenylglycoluril basket receptors 1 and 2, appended with bis(2-ethylpyridine)amine (PY2) and tris(2-methylpyridine)amine (TPA), respectively, and their dioxygen adducts were studied with low temperature UV-vis and X-ray absorption spectroscopy (XAS). The copper(I) complex of 1, [1-Cu(I)2] or 1a, forms a ^-n2:^2 dioxygen complex, whereas the copper(I) complex of 2, [...

The resulting injury to specific cells of the leaves releases the contents of the vacuoles, allowing intermixing with enzymes associated with other cell structures. Phenol oxidase is such an enzyme and causes the oxidation of various polyphenols (tannin -like substances) normally found in the cell vacuole. Oxidation of polyphenols, followed by vaguely understood polymerization reactions, result...

The kinetics of oxidation of thiomalic acid by quinaldinium fluorochromate(QnFC) has been studied in non aqueous medium. The oxidation kinetics was followed photoelectric colorimetrically in the temperature range of 30°C–60°C. The reaction shows unit order dependence each with respect to substrate and oxidant. The reaction is catalyzed by hydrogen ions. The hydrogen ion dependence takes in the ...

The copper(I) complexes of diphenylglycoluril basket receptors and , appended with bis(2-ethylpyridine)amine (PY2) and tris(2-methylpyridine)amine (TPA), respectively, and their dioxygen adducts were studied with low-temperature UV-vis and X-ray absorption spectroscopy (XAS). The copper(I) complex of, [.Cu(I)2] or, forms a micro-eta2:eta2 dioxygen complex, whereas the copper(I) complex of, [.Cu...

Formation of filamentous F-actin drives many cellular processes, including phagocytosis and cell spreading. We have recently reported that mouse macrophage 12/15-lipoxygenase (12/15-LO) activity promotes F-actin formation in filopodia during phagocytosis of apoptotic cells. Oxidized low-density lipoprotein (OxLDL) also stimulates robust F-actin formation and spreading of macrophages. However, u...

Polymerization of metallothioneins is one of the usually encountered puzzles during the research process of metallothioneins' structure and function. Our work focuses on the cysteine independently occurred polymerization from metallothioneins monomers in different milieus, while it leaves out the aggregation caused by the oxidation of cysteine, because the latter circumstance is the result of p...

The synthesis of novel carbohydrate-based polymers allows the structure to be tailored at the monomer level for a specific property and expands the range of available structures beyond those found in nature. Using a controlled anionic polymerization, a new type of carbohydrate polymer is synthesized in which glucose-derived monomers are joined by an α-1,2 amide linkage to give enantiopure poly-...

The effect of a diacetylene-containing phospholipid on the oxidation of pyrite, FeS2, was investigated. Earlier work reported by our research group showed that the adsorption of 1,2-bis(10,12-tricosadiynoyl)-sn-glycero-3phosphocholine on pyrite suppressed the extent of its oxidation by about 75% over a specific time period. Results presented here show that the pre-exposure to UV radiation of th...