in the chemical industry, process intensification is needed to meet important goals such as sustainable and eco-friendly processes. for esterification reaction the “produce more with less pollution” objective can be achieved by coupling reaction and separation in a so called integrated process. in this work a model for describing the esterification reaction of ethyl acetate in pervaporation mem...

losartan potassium is a well known orally active non-peptide angiotensin ii receptor antagonist. losartan potassium and its principle active metabolites block the vasoconstrictor and aldosterone secreting effect of angiotensin ii by selectively blocking the binding of angiotensin ii to at1 receptors. the drug is reported to promote the decrease in ventricular hypertrophy, salt and water excreti...

natural substances extracted from plants have recently been considered as potential sunscreen resources because of their ultraviolet ray absorption in the uva region and their antioxidant activity. in the present study, the uv protective effects of ethyl acetate extracts of some common medicinal plants, which have flavonoids and other phenolics as the most important components, were evaluated u...

the cycloalkylation of diethyl malonate and ethyl cyanoacetate with alkyl dihalide was investigated by using comminuted potassium carbonate as a base and toluene as a solvent in the presence of hexadecyltrimethylammonium bromide (htmab) as a phase-transfer catalyst, which provided a conventional procedure with the advantage of short reaction period and high product yield. the factors influencin...

normal 0 false false false en-us x-none ar-sa backgrounds : lumbar disc herniation (ldh) is the most common surgical intervention of spine surgery. during few days of the operation, most patients experience worrying low back pain ( lbp) and radicular leg pain (rlp). applying liquid form of bupivacaine in the vicinity of surgical field could be effective on pain relief only for few hours after o...

We propose a simple procedure for visualising the electron density changes (EDC) during chemical reaction, which is based on mapping of rectangular grid points stationary structure into (distorted) positions around atoms another structure. Specifically, small step along minimum energy pathway (MEP), displacement each point obtained as linear combination motion all atoms, with contribution from ...