A water-soluble, highly polar, heat-stable, small molecule has been isolated from cell-free extracts of the halotolerant green alga Dunaliella salina. This compound, soluble inhibitory factor (SIF), when added to in vivo light-activated, thylakoid membrane-bound preparations of the D. salina coupling factor 1 (CF1), causes a rapid inactivation of the ATPase activity. SIF must be in its oxidized...

Silica aerogels are among the most easily produced types of aerogels due to the availability of required materials, the cheapness of required materials such as carbon dioxide, ethanol, and tetraethyl orthosilicate, and the relatively simple sol-gel chemistry. Using silica aerogels as skeletons, nanomaterials were easily and effectively structured in three dimensions. The aerogels were doped wit...

The key event in prion diseases seems to be the conversion of the prion protein PrP from its normal cellular isoform (PrP(C)) to an aberrant "scrapie" isoform (PrP(Sc)). Earlier studies have detected no covalent modification in the scrapie isoform and have concluded that the PrP(C) --> PrP(Sc) conversion is a purely conformational transition involving no chemical reactions. However, a reexamina...

The title compound, C(8)H(8)N(2)S, was prepared by the condensation of N-methyl-1,2-phenyl-enediamine and carbon disulfide. The crystal structure is stabilized by a C-H⋯π inter-action between a benzene H atom and the benzene ring of a neighbouring mol-ecule, and by inter-molecular N-H⋯S inter-actions.

The components of electrocardiograms (ECG) of 253 workers exposed to carbon disulfide (CDS) and those of 99 controls were quantitatively measured and evaluated. ECG of the exposed workers showed a statistically significant higher prevalence of ECG pathological changes, higher P amplitude and Macruz index, longer P duration, longer both crude and corrected Q-T intervals and R-R intervals and sho...

The hydrolysis mechanism of CS(2) was studied using density functional theory. By analyzing the structures of the reactant, transition states, intermediates, and products, it can be concluded that the hydrolysis of CS(2) occurs via two mechanisms, one of which is a two-step mechanism (CS(2) first reacts with an H(2)O, leading to the formation of the intermediate COS, then COS reacts with anothe...

Organic solvents are pervasive in the communal and industrial environments. Although many are potent central nervous system agents, clearly delineated behavioral effects have played only a minor role in the formation of exposure standards. A comprehensive behavioral pharmacology and toxicology of these compounds is one aim of US/USSR collaboration. The current report describes some actions of c...

High pressure plays an increasingly important role in both understanding superconductivity and the development of new superconducting materials. New superconductors were found in metallic and metal oxide systems at high pressure. However, because of the filled close-shell configuration, the superconductivity in molecular systems has been limited to charge-transferred salts and metal-doped carbo...

A detailed chemical kinetic model for oxidation of CS2 has been developed, on the basis of ab initio calculations for key reactions, including CS2 + O2 and CS + O2, and data from literature. The mechanism has been evaluated against experimental results from static reactors, flow reactors, and shock tubes. The CS2 + O2 reaction forms OCS + SO, with the lowest energy path involving crossing from ...