reproductive parameters evaluation is considered as helpful tool for gene bank formation in ecological and economically important animals species. gloydius halys caucasicus is venomous, viviparous pit viper of northwest of iran. in this research, the spermatic reproductive parameters of this taxon were studied. twenty six male snakes were collected from takht-e-soleiman region between september...

the main objective of endodontic therapy is the thorough mechanical and chemical cleansing of the entire root canal system and its complete obturation with an inert filling material. failure to find and fill a canal contributes toward the failure of endodontic therapy .the root canal anatomy of mandibular first molars is complex. studies of the morphologic structure of root canal systems have d...

the systematics, morphology, distribution, biology, economic importance and conservation of the lamprey of iran are described, the species is illustrated, and a bibliography on this fish in iran is provided. there is one native and endemic species in the caspian sea basin, caspiomyzon wagneri . the genus caspiomyzon is characterised by having 2 dorsal fins, an oral disc narrower than the body, ...

the family magnaporthaceae considered as a single-family placed in the order magnaporthales. currently, three distinct clades are phylogenetically distinguished in this order that one is referred as the pyriculariaceae. the pyriculariaceae is characterized as a novel family having new genera, new species, new combinations and neotypification (basionym). to taxonomically evaluate this family, an...

Combining experimental data and computer modeling, Fink et al. (page 929) demonstrate that cellular geometry is important in the spatiotemporal control of intracellular signaling. The researchers examined the dynamics of inositol-1,4,5-trisphosphate (InsP 3 )-mediated calcium signaling in neuroblastoma cells with complex morphology, and also simulated InsP 3 signaling in a computer model called...

the systematics, morphology, distribution, biology, economic importance and conservation of the perches of iran are described, the species are illustrated, and a bibliography on these fishes in iran is provided. there are three species, perca fluviatilis , sander lucioperca and s. marinus , found naturally in the caspian sea basin, with s. lucioperca translocated.

zn-co electrodeposits have attracted interest because of their significantly higher corrosion resistance in comparison with pure zinc. in this research the influence of bath temperature and electrolyte’s co 2+ concentration on the morphology and composition of the zn-co coatings, electrodeposited on an aisi1018 steel substrate from a weakly alkaline glycine solutions, has been studied. sem and ...

the systematics, morphology, distribution, biology, economic importance and conservation of the sticklebacks and pipefishes of iran are described, the species are illustrated, and a bibliography on these fishes is provided. there are two sticklebacks ( gasterosteus aculeatus , an exotic, and pungitius platygaster , a native) and one native pipefish ( syngnathus caspius ), the natives found in t...

the systematics, morphology, distribution, biology, economic importance and conservation of the milkfish ( chanos chanos ) of iran are described, the species is illustrated, and a bibliography on this fish in iran is provided. it is characterised by a compressed and oblong body, small, toothless and terminal mouth, non-protractile upper jaw, lateral pouches on the posterior part of the branchia...