emerging technologies such as biotheraputics are widely view as the source of new types of competitive advantage. despite their huge potential gaining advantages from these technologies requires adopting different types of managerial skills and insight than those utilized in the context of incremental improvements. this makes established firms particularly vulnerable to the challenges of these ...

let $alpha$ be an automorphism of a ring $r$. the authors [on skewinverse laurent-serieswise armendariz rings, comm. algebra 40(1)(2012) 138-156] applied the concept of armendariz rings to inverseskew laurent series rings and introduced skew inverselaurent-serieswise armendariz rings. in this article, we study on aspecial type of these rings and introduce strongly armendariz ringsof inverse ske...

the hawthorn fruits have been used as food and medicine for centuries. in the present study, pulp and seed extract of crataegus elbursensis rech. f. fruits belonging to the family rosaceae and native of northern part of iran were evaluated for the polyphenol contents, antiradical, antioxidant, and antibacterial activities. the total phenolic, flavonoid, and anthocyanin contents of methanolic pu...

background & aim: free radicals play a crucial role in the development of tissue damage in various human diseases such as cancer, aging, neurodegenerative disease, malaria and arteriosclerosis, and pathological events in living organisms. antioxidants may have an important role in the prevention of these diseases. the aim of this study is to evaluate potency of scavenging of dpph free radic...

The reactivity of the cysteine (Cys) and homocysteine (Hcy) radical cation was studied using ion-molecule reactions. The radical cations were generated via collision-induced dissociation (CID) of their S-nitrosylated precursors. Cleavage of the S-NO bond led to the formation of the radical initially positioned on the sulfur atom. The reactions of the radical cations with dimethyl disulfide reve...

PURPOSE Surgical technique, patient characteristics and method of pathological review may influence surgical margin status. We evaluated the incidence and location of positive surgical margins in 200 sequential robotic assisted laparoscopic radical prostatectomy and 200 sequential open radical retropubic prostatectomy cases. MATERIALS AND METHODS From July 2002 until December 2006 a total of ...