Abstract. The presence of organic sulfur compounds (OS) at the water surface acting as surfactants, may influence air-water interaction and contribute to new particle formation in atmosphere. However, impact ubiquitous anthropogenic pollutant emissions, such SO2 polycyclic aromatic hydrocarbons (PAHs) on OS interface still remains unknown. Here, we observe large amounts SO2, upon irradiation aq...

The spatial glaciochemical variability of snow samples collected along a transect from Zhongshan Station to Lambert Glacier Basin 69 (LGB69) in Antarctica was investigated. Sea-salt ion concentrations exponentially decreased with increasing distance the coast and/or altitude. observed high sea-salt within 20.6 km may be related preferential wet or dry deposition aerosols. Methanesulfonic acid (...

When analyzing large complex protein biopharmaceuticals, ion-pairing agents imparting low pH are widely used as mobile phase additives to improve the chromatographic performance. However, one of most effective in RPLC and HILIC, trifluoroacetic acid (TFA), is known a strong suppressor MS signal limits its use hyphenated techniques. In this study, we evaluated wide range acidic find alternatives...

Here, valuable elements in Talet Seleim, Southwestern, Sinai, Egypt was leaching using methanesulfonic acid (MSA) as an environmental-friendly and ecofriendly lixiviant agent. The effects of methane sulfonic concentration, time reaction, temperature, liquid/solid ratio (L/S) stirring speed on dissolution MSA were studied. optimized conditions for various metals were: concentration; 150g/L, time...

The hydroxylation or epoxidation of hydrocarbons by bacterial multicomponent monooxygenases (BMMs) requires the interplay of three or four protein components. How component protein interactions control catalysis, however, is not well understood. In particular, the binding sites of the reductase components on the surface of their cognate hydroxylases and the role(s) that the regulatory proteins ...

Methanesulfonyl fluoride is an oxydiaphoric (acid-transferring) inhibitor of acetylcholinesterase. It reacts with the enzyme to produce a methanesulfonyl enzyme derivative. The group in the enzyme that is sulfonylated lies near the anionic site and is possibly the same group that is acetylated during the normal catalytic activity of the enzyme, i.e. the basic group of the esteratic site (1, 2)....

The phase inversion technique was used to produce polyaniline (PAn) actuators with different geometries that cannot be obtained by PAn cast from N-methyl-2-pyrrolidinone (NMP) solution in a conventional way. PAn was cast and coagulated in a water bath forming films and tubes with or without a platinum (Pt) wire helix as an interconnect. PAn was doped with hydrochloric solution (HCl, 1 M) (PAn/H...

The aim of this work was to expand the applicability range UHPSFC series synthetic and commercialized peptides. Initially, a screening different column chemistries available for analysis performed, in combination with additives either basic or acidic nature. an additive (13 mM TFA) stationary phase (Torus DEA 2-PIC) found be best six peptides possessing acidic, neutral isoelectric points. Secon...