Mesoporous MCM-41 silicas anchored with sulfonic acid (–SO3H) groups (denoted MSN-SA) via postsynthesis modification are very effective for the Beckman rearrangement. A simple and convenient procedure for conversion of a variety oximes to their corresponding amides and lactams has been developed. The reaction was carried out in the presence of MSN-SA as the catalyst. The best results for conver...

modifying polyester spacer fabric by β-cyclodextrin produces a new product with outstanding characteristics. citric acid is used as a crosslinking agent for improvement of durability of this material in textile fabrics. in this research different concentrations of citric acid and β-cyclodextrin were applied on a 3d fabric and some properties including weight change, weight of moisture residue, ...

Carbon dots (CDs) were prepared from p -phenylenediamine, modified with trifluoroacetic acid, and dispersed in a fluoropolymer (FP) film. Unmodified CDs did not disperse well the FP film, resulting concentration quenching; whereas surface modification improved affinity between FP, homogeneous dispersion an photoluminescence quantum yield.

The purpose of this study was to investigate a new biochemical surface modification technique for titanium implants using phospho-amino acid. Pure titanium disks were pretreated with 10 N HCl and ultrapure water at room temperature for 30 minutes respectively. Then these disks were modified with either L-threonine (Thr) or O-phospho-L-threonine (P-Thr) at 37 degrees C for 12 hours. X-ray photoe...

Optimization of small interfering RNAs (siRNAs) is important in RNA interference (RNAi)-based therapeutic development. Some specific chemical modifications can control which siRNA strand is selected by the RNA-induced silencing complex (RISC) for gene silencing. Intended strand selection will increase potency and reduce off-target effects from the unintended strand. Sometimes, blocking RISC loa...

It was found recently (1) that feeding a cholesterol-rich diet to pantothenic acid-deficient rats did not result in the fatty livers and high levels of cholesterol in liver and serum seen in comparable animals maintained on a normal diet. Decrease in food intake appeared not to account for this phenomenon, since the food intake of the deficient group on a body weight basis was higher than that ...

The feeling of warmth after a meal is caused by the ingestion of nutrients and the sensation is known as nutrition-induced thermogenesis or specific dynamic action. Core body temperature (Tb) is constantly maintained within a narrow range, but thermoregulation can become impaired by the inhalation or intravenous administration of anesthetics that inhibit hypothalamic thermoregulation. Hypotherm...

AIM The ability of Lactobacillus casei and Lactobacillus paracasei to modify the azo dye, tartrazine, was recently documented as the result of the investigation on red coloured spoilage in acidified cucumbers. Fourteen other lactic acid bacteria (LAB) were screened for their capability to modify the food colouring tartrazine and other azo dyes of relevance for the textile industry. METHODS AN...