An unidentified gram-positive anaeroic organism capable of dehydrogenating the 7 beta-hydroxy group of ursodeoxycholic acid was recovered from human feces. By combined action of this organism with the ordinary 7 alpha-dehydrogenating bacteria, chenodeoxycholic acid and cholic acid alike were readily converted into their respective 7 beta-epimers and the reverse reactions were also carried out. ...

background: every year millions of dollars are expended to equip and maintain the hospital sterilization centers, and our country is not an exception of this matter. according to this, it is important to use more effective technologies and methods in health system in order to reach more effectiveness and saving in costs. this study was conducted with the aim of evaluating the technology of regi...

background: colonoscopy is used for both diagnostic as well as therapeutic purposes in patients with lower gi symptoms. the aim of this study was to assess the clinical manifestations and to determine the colonoscopic findings of children with lower gi symptoms attending a pediatric hospital in tehran. materials and methods: during a 5-year period (1996-2001), all children less than 16 years of...

We report the identification and characterization of 2 classes of benzodiazepine binding sites in the embryonic chick CNS. Binding was examined by competition and saturation binding experiments, using as radioligands 3H-flunitrazepam, a classical benzodiazepine anxiolytic, and 3H-Ro5-4864, a convulsant benzodiazepine. The results demonstrate that high-affinity (KD = 2.3 nM) 3H-flunitrazepam bin...

The simultaneous effects of soil and existing structures are known as the site-city interaction (structure-soil-structure). The impact of site-city interaction on structure behavior is effective. Thus, this interaction in some regions decreases the responses while increases in other areas. In addition, the site-city interaction of many parameters including the soil type, density rate, height of...