a highly efficient and simple method for the preparation of α,α´-bis(arylidene)cycloalkanones under solvent-free conditions has been developed. the crossed-aldol condensation of cycloalkanones (1 eq.) with arylaldehydes (2 eq.) in the presence of 2.5 mol% of ionic liquid 1,3-disulfonic acid imidazolium hydrogen sulfate {[dsim]hso4} afforded the title compounds in high yields and short reaction ...

a simple, clean, and environmentally benign three-component process for the synthesis of 2-amino-4hchromenes using [mim]cl, as an efficient catalyst under solvent-free conditions are described. a wide range of aromatic aldehydes easily undergoes condensations with 1-naphthol and malononitrile under solvent-free conditions to afford the desired products of good purity in excellent yields. taking...

we hav e obs e r v e d 1 00 c a ses o f pr imar y c a r c i noma of the l i v e r be t we en 195 5-1 97 5 ~n emarn khome i ni ho spital me- service de gastro e ntero l ogie c hu

in this study, removal of acid blue 62 from aqueous solution by mesoporous silicate mcm-41 modified by aminopropyltriethoxysilane (aptes) composite was studied. properties of synthesized composite were analyzed and confirmed by sem, edx and ftir. results show that langmuir adsorption isotherm has the best compatibility with the results of experiments. kinetic analysis using pseudo-first-order m...

Light fie ld re c o n stru c tio n is still m o stly lim ite d to sta tic sc e n e s o r is o n ly a p p lic a b le to d y n a m ic sc e n e s u sin g so p histic a te d a n d c o stly ha rd w a re . In c o n tra st to tha t, o u r c o n trib u tio n d e sc rib e s a sy ste m w hich a llo w s the re c o n stru c tio n o f a light fie ld o f a sc e n e in c lu d in g o n e o r m o re rigid ly m ...

soil reduces the hazardous effects of compounds on the components of ecosystem because of self –purification property and the ability for their fixation. playing such a role in soils under redox conditions is performed by pedogenic fe-mn concentrations. in order to investigate cobalt, copper and lead accumulation in iron and manganese concentrations, at first the concentrations were precisely s...

a case o f intrahepatic stone and its t r eat ment i s present e d . the t ype s o f i ntrahepatic s tones , t h e etiological f act o r , t he ways of di agno s is and t reatment a re b eing discussed. the disease is common in far eastern c ountri es a nd asian are a, with c lonorchi s s i nens is inf estation, but s peci ally in iran when the s tones i s a lone in intrahepatic ducts without e...

Background and objectives: Dorema glabrum Fisch. & C.A. Meyfrom Umbelliferae family is a monocarpic species distributed in north-west of Iran, Azerbaijan republic and Armenia. The gum-resin of this species is traditionally used for the treatment of bronchitis, catarrh and diarrhea, as well as for its diuretic properties. Recently, we have reported the isolation of five...

introduction:holmium-166 radionuclide is one of the most effective radionuclides used for targeted therapy with theranostic properties. one method to produce this radioisotope is via the decay of its parent (indirect method). in this study applicability of extraction chromatography (exc) for separation of no carrier added 166ho from neutron-irradiated natural dysprosium target followed by quali...

degradation of o,o-dimethyl -o-4-nitrophenylphosphorothioate (methylparathion) by ozonation in aqueous solution was studied in a batch reactor under constant ozone dosage and variable ph conditions. the effectiveness of the process was estimated based on the degree of cod (chemical oxygen demand) reduction and conversion of methylparathion. it was observed that ozonation is more effective at a...