for the first time b-podands have been studied as an efficient and powerful catalysts in the ring opening of epoxides with azide anion in water. the reaction afforded the corresponding 1,2-azidoalcohols with high regioselectivity under mild reaction conditions and in a highly atom economic fashion.

background and aim: colon cancer is the third most prevalent cancer in iran. prolonged colon inflammation is an important factor, in the development of colon cancer. ginger has anti-inflammatory properties due to its content of [6]-gingerol and hence can play a role in the prevention of colon cancer. in this research the effects of ginger extract on reducing expression of the cox-2 gene in ht-2...

this paper describes the applicability of 1,3-dichloro-5,5-dimethylhydantoin, as a cheap, stable and commercially available catalyst, in the promotion of the synthesis of 1,8-dioxo-octahydro-xanthenes (doxos) via the one-pot condensation of aldehydes and cyclic 1,3-dicarbonyl compounds. this novel synthetic method has the advantages of high yields, short reaction times, low cost and availabilit...

the essential oils isolated by hydrodistillation from the leaves of two eucalyptus gillii maiden and e. microcarpa subsp. macrocarpa hook were analysed by gc and gc/ms. the main components identified in e. gillii oil were 1, 8-cineole (79.5%), trans-pinocarveol (8%) and ?-pinene (2.7%), and in e. microcarpa were 1, 8-cineole (77.3%), ?-pinene (5.6%) and terpin-1-ol (5.1%). oils with high conten...

soil compaction is one of the most prevailed limitations for crop growth. the use of organic matters as fertilizer on agricultural soils can reduce the effects of soil compaction and provide the nutrients for the plants. so, a factorial experiment was carried out in a randomized complete blocks design with three replications. the first factor was the source and amount of organic fertilizer (far...

autosomal polycystic kidney disease (adpkd) is a genetic disorder with two causal pkd-1 and pkd-2. genetic studies have demonstrated an important allelic variability between patients but few data are known about genetic variants in african populations. we report a new mutation found in a 41-year old women with mild chronic kidney disease secondary to adpkd. molecular genetic testing found a del...

introduction: one class of magnetic nanoparticles is magnetic iron oxide nanoparticles (mions) which has been widely offered because of their many advantages. because of extensive application of mions in biomedicine, before they can be used in vivo, their cytotoxicity must be investigated. therefore, there is an urgent need for understanding the potential risks associated with mions. materials ...

abstract background and aims: probable risk factors of clinical anastomotic leakage and the role of defunctioning stoma in patients undergoing low anterior resection (lar) for rectal cancer, is still controversial. the goal of our study was to find out possible risk factors of anastomotic leakage and to locate the influence of protective stoma in the rate of anastomotic leakage. materials and m...