We report on a study of the morphology of (100) silicon surfaces etched in aqueous alkaline solutions. It is shown that the formation of pyramidal hillocks during etching can be influenced in two different ways: by the presence of an oxidizing agent (ferricyanide or oxygen) in the etchant solution, or by etching under anodic bias. In both cases pyramid formation is suppressed without a signific...

Methyl Ethyl Ketone Peroxide (MEKP) is a highly toxic clear liquid used as a solvent. It is a strong oxidizing agent and a corrosive. Acute and chronic toxicity can occur as an occupational hazard. Ingestion is associated with corrosive burns leading to stricture formation, inhalational pneumonitis, acidosis, liver failure and renal failure. In this paper we present a case of a young patient wh...

In-situ leaching of molybdenum and uranium is becoming an increasingly common process. The features the material composition ores, leading to a decrease in their filtration properties, were considered. Activation with solutions that have undergone electrophotochemical activation before contact ore mass studied. preparation promotes synthesis clustered water molecules collectivized protons hydro...

A novel sol-gel method was employed in this study to efficiently synthesize SnO2 nanoparticles catalyze the ozonation of acetaminophen (ACT) from aqueous solutions. The influence various parameters including Sn source, type capping and alkaline agents, calcination temperature on catalytic activity preparations investigated. prepared by tin tetrachloride as NaOH gelatin agent, CTAB agent at 550 ...

One of the oldest and most well-known cosmetics, hair color has been used by numerous ancient cultures throughout history on both men women. It involves treating with various chemical compounds for changing color. According to how long they remain in hair, these products are primarily divided into two categories: temporary permanent. This classification is consistent types active substances dye...

Ethylene is readily produced aerobically from oc-keto-ymethylthiobutyric acid as well as from fl-methylthiopropionaldehyde (methional) by peroxidase in the presence of Mn2+, SOa2-, and phenol. Tracer studies indicate that carbons 1, 2, 3 plus 4, and the methyl carbon of oc-keto-y-methylthiobutyric acid gives rise to carbon dioxide, carbon dioxide, ethylene, and methyldisulfide, respectively. Ca...

The sensitivity of acetylcholinesterases (ACHE) isolated from the plant-parasitic nematodes Meloidogyne arenaria, M. incognita, and Heterodera glycines and the free-living nematode Caenorhabditis elegans to carbamate and organophosphate nematicides was examined. The AChE from plant-parasitic nematode species were more sensitive to carbamate inhibitors than was AChE from C. elegans, but response...

A bifunctional nanocatalyst composed of iron containing SBA-15 material modified with sulfonic acid groups was synthesized by a mechanochemical approach. A full characterization of the obtained nanocatalyst was performed by N2 physisorption isotherms analysis, transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and Fourier-Infrared Spectroscopy (FT-IR). The mechanochemically ...

Three foldases--the apical domain of GroEL (mini-chaperone) and two oxidoreductases (DsbA and DsbC) from Escherichia coli--were studied in refolding a protein with immunoglobulin fold (immunoglobulin-folded protein) that had been produced as inclusion bodies in E.coli. The foldases promoted the refolding of single-chain antibody fragments from denaturant-solubilized and reduced inclusion bodies...

Four novel monodentate 2-(3′-(4′′-sub-aryl)-1′-phenyl-1H-pyrazole-4-yl)-1H-benzo[d]imidazole ligands (La-d) have been synthesized via the cyclocondensation of o-phenelyndiamine with 1,3-disubstituted pyrazole aldehydes by adding oxidizing agent ceria ammonium nitrate as catalyst in presence of hydrogen peroxide in alcoholic media. The non chelated Cu(II) and Ni(II) complexes of newly synthesize...