Transcription of T7 DNA by T4 core enzyme with host sigma is more sensitive to KCI than that by host core enzyme with host sigma. When salt is added after initiation of RNA chains has occurred, it is not inhibitory. Salt affects the binding of T4 enzyme to T7 DNA to the same degree as the binding of host enzyme. Active preinitiation complex formation is inhibited more by salt with the T4 enzyme...

Immobilization of a thyroid hormone substitute L-thyroxine on chitosan-based smart hydrogel structure was performed to reduce the side effects required daily dose. The obtained by Schiff reaction chitosan with acetaldehyde and quaternization methyl iodide then ion exchange NaCl salt. Finally, from treatment salt at -200C. amount levothyroxine immobilized physical sorption determined molecular e...

2-(Methylamino) pyridine (HMAP) reacts with MeLi in THF and generates the lithium salt (LiMAP). Further reaction of [Cu(TMEDS)2][CuCl2] (TMEDA=tetramethylethylenediamine) with one equivalent of this ligand in THF leads to the formation of a yellow dimeric Cu(I) complex, [Cu(MAP)]2. Analytical data, molecular weight, and magnetic susceptibility measurements, ...

The DNA untwisting enzyme relaxes covalently closed circylar DNAs by the sequential breaking (nicking) and closure of one strand of the duplex. The use of highly purified enzyme from rat liver nuclei at very high protein concentrations has permitted the detection of the nicked intermediate in the reaction. The nicking of closed circular simian virus 40 DNA was measured by alkaline sucrose gradi...

This study reports the synthesis of morphology-controlled BaTiO(3) nanostructures such as spherical, cube-shaped and rod-shaped BaTiO(3) using a molten-salt synthesis method. This method synthesized products from a reaction of BaO/BaCO(3) and TiO(2) with a eutectic mixture of NaCl-KCl flux at 700 degrees C for 1 h. The experiment used powder X-ray diffraction, field emission scanning electron m...

Synthetic nanoparticles are always terminated with coating molecules, which are often cytotoxic and not desired in biomedicine. Here we propose a novel reaction-dissolution approach to remove the cytotoxic coating molecules. A two-component solution is added to the nanoparticle solution; one component reacts with the coating molecules to form a salt whereas another is a solvent for dissolving a...

The interactions of a series of urea based neutral hydrogen bond donor anion receptors have been investigated with i) alkylcarbamate anions formed by the reaction of carbon dioxide with primary aliphatic amines and ii) the zwitterionic species formed by the reaction of carbon dioxide with 1,4,5,6-tetrahydropyrimidine. Significant downfield chemical shift changes were observed for the urea NH pr...

Interfaces As a Source of Sulfate Formation in Sea-Salt Particles” (II) In the laboratory, Laskin et al. (1) studied the role of the surface reaction OH Cl 3 OH Cl for influencing the pH and oxidation of S(IV) in the marine boundary layer. They concluded that it increases the sulfate production rate in tropospheric sea-salt particles. However, in their extrapolation to atmospheric conditions th...

Sodium-based catalysts (such as Na2 WO4 ) were proposed to selectively catalyze OH radical formation from H2 O and O2 at high temperatures. This reaction may proceed on molten salt state surfaces owing to the lower melting point of the used Na salts compared to the reaction temperature. This study provides direct evidence of the molten salt state of Na2 WO4 , which can form OH radicals, using i...

We previously reported increased aortic reactive oxygen species (ROS) production in mineralocorticoid (deoxycorticosterone acetate [DOCA]-salt) hypertensive rats. In the present study, we tested the hypothesis that NADH/NADPH oxidase is responsible for increased ROS production, namely superoxide (O(2-)), in aorta from the DOCA-salt rat. Treatment of aortic rings from DOCA-salt rats with the NO ...