In an earlier paper the authors showed that with one exception the nonorientable genus of the graph Km +Kn with m ≥ n−1, the join of a complete graph with a large edgeless graph, is the same as the nonorientable genus of the spanning subgraph Km+Kn = Km,n. The orientable genus problem for Km +Kn with m ≥ n−1 seems to be more difficult, but in this paper we find the orientable genus of some of t...

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Members of Nemacheilidae Family, Turcinoemacheilus genus were subjected to molecular phylogenetic analysis in this study. This genus was reported in 2009 to inhabit in Karoon River drainage, in contrary to previous assumption that it was the endemic species in the Basin of Tigris River. It was sampled from three stations placed in different tributaries in Karoon drainage and evaluated to unders...

Section Prostrata of the genus Verticillium was introduced by GAMS (1971) to separate verticillium-like anamorphs of the Clavicipitaceae from other species of the genus that were known or supposed to have affinities with other families of the Hypocreales. Other sections of Verticillium were subsequently described by GAMS & VAN ZAAYEN (1982). MESSNER et al. (1996) showed that the most important ...

the systematics, morphology, distribution, biology, economic importance and conservation of the freshwater catfishes of iran are described, the species are illustrated, and a bibliography on these fishes is provided. there are four families with four genera and six species, one of which is an exotic; the family bagridae with one genus and species, mystus pelusius in the persian gulf, hormuz and...

Let G be a finite group. The strong symmetric genus σ0(G) is the minimum genus of any Riemann surface on which G acts preserving orientation. The groups of strong symmetric genus σ0 ≤ 3 have been classified. Here we classify the groups of strong symmetric genus four. There are exactly ten such groups; eight of these are automorphism groups of regular maps of genus 4. We also consider non-abelia...

background and objective: genus salacia l. (celastraceae) is a woody climbing medicinal plant consisting of about 200 species with many endangered species located throughout the world’s tropical areas. various parts of the plant as food, functional food additive and tea have been extensively used to treat a variety of ailments like diabetes and obesity as well as inflammatory and skin diseases....