Two methylotrophic bacterial strains, TR3 and PSCH4, capable of growth on methanesulfonic acid as the sole carbon source were isolated from the marine environment. Methanesulfonic acid metabolism in these strains was initiated by an inducible NADH-dependent monooxygenase, which cleaved methanesulfonic acid into formaldehyde and sulfite. The presence of hydroxypyruvate reductase and the absence ...

A new method for the sensitive and selective determination of stronger acids, such as methanesulfonic acid, based on an acid-base interaction with N-methylacridone fluorophore (1), is proposed. The fluorescence spectrum of 1 was changed drastically by the addition of methanesulfonic acid in methanol. A ratiometric analysis of methanesulfonic acid by measuring the fluorescence intensities of 1 b...

treatment with these acids may cause disorder to the stiff fibril structure of native chitin with a slight cleavage of glycosidic linkages, and afford enzymatically digestible colloidal chitins. The enzymic digestibility varies mainly with these acids used for its preparation. Wenow wish to report an improved method for the preparation ofcolloidal chitin by treatment with aqueous methanesulfoni...

Abstract This paper reviews the properties of methanesulfonic acid (MSA) and its potential for use in hydrometallurgy. Although MSA is much less known than sulfuric, hydrochloric or nitric acid, it has several appealing that makes very attractive development new circular flowsheets Unlike other organic acids such as acetic a strong ( pK = ? 1.9). In addition, stable against chemical oxidation r...

the use of methanesulfonic acid as a brønsted acid for direct ortho-acylation of phenols and naphthols proves to be a convenient, more general and direct route to various hydroxyaryl ketones. the route is regioselective, leading to ortho c-acylated products in satisfactory to high yields in most cases. the solvent free reactions described below exhibited environmentally benign in terms of faste...

Kaiho, Hiromi, Junko Kimura, Isao Matsuoka, and Hironori crease in the ATP-induced current when external Cl was Nakanishi. Effects of anions on ATP-activated nonselective cation replaced with methanesulfonic acid (MS) . In the present current in NG108-15 cells. J. Neurophysiol. 77: 2717–2722, 1997. study we investigated the effects of various external anions Extracellular ATP induces a nonselec...

the reaction of tertiary, secondary and benzylic alcohols with different nitriles in the presence of alumina-methanesulfonic acid (ama) as a new reagent affords the corresponding amides in good yields (table 1, 2). conversion of 2,6-bis(hydroxymethyl)-4-halo anisoles into corresponding diamides in the range of 68-76% yields (table 3) are also included in this paper.

methanesulfonic acid (msa) was found to be an efficient catalyst for the synthesis of 1-substituted-1h-1,2,3,4-tetrazoles. a series of 1-substituted tetrazole compounds were synthesized from the reaction of various primary amines, sodium azide and triethyl orthoformate in the presence of catalytic amounts of msa at room temperature. in this protocol, some of the tetrazole derivatives were synth...

The complex index of refraction of aqueous methanesulfonic acid (MSA) at room temperature and at concentrations of 1-70 wt. % is presented. The complex index of refraction is obtained in the entire wave-number region from the mid infrared to the ultraviolet-visible regions. An analysis of the infrared spectra reveals a single absorption band, which makes it possible to identify MSA in aqueous H...