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The article reports on the impurity composition and toxicological hazard of the wastewater from production of chemicothermomechanical mass for manufacturing pressboard and different types of paper.

The feasibility of isolation and quantitative determination by gas chromatography of methylphosphonic acid and its mono- and dialkyl etsers, which originate from destruction of organophosphorus chemical warfare agents and have been detected in bitumen-salt compounds is examined.

Longitudinal plane simple waves having initial profiles in the form of the Chebyshov–Hermite function and propagating in a solid two-phase mixture are studied. The interaction between two simple waves, generation of the third wave because of this interaction, and the conditions for its occurrence are successively stated. The case where the third wave is not generated is analyzed numerically for the first time

Conclusions It is possible to obtain strong gas-permeable ceramics on the basis of Al2O3 using, as the bond, a dispersed mixture consisting of SiC with active additives. In terms of mechanical strength, the newly developed ceramics exceed existing forms of porous oxide ceramics with similar porosity levels by a factor of more than 2–3.

A procedure for determination of the lewisite metabolite 2-chlorovinylarsonous acid (CVAA) in biomedical samples, involving derivatization of the latter with propane-1,3-dithiol and head-space solid-phase microextraction of the derivative on a 100-µm PDMS fiber followed by GC-MS, was applied for the first time to analysis of in vivo samples. The detection limits of CVAA in urine, plasma and red blood cells were 0.1, 1.0 and 10 ng/ml, respectively. Upon exposure to lewisite at a dose of 1.6 mg/kg, CVAA could be detected in rat urine for about three months. Study of the effect of a single injection of the antidote unithiol on the CVAA excretion profile revealed more active CVAA excretion during the first two days after the injection, compared to that observed in the absence of antidotal therapy.

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ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.

Reaction of phosphorus pentachloride (I) with the phosphites (II) and acetaldehyde (III) produces mixtures of the dialkylchlorophosphates (IV) and the dialkylphosphoryl ethyldichlorophosphites (V).