the systematics, morphology, distribution, biology, economic importance and conservation of the bull shark ( carcharhinus leucas ) in iran are described, the species is illustrated, and a bibliography on this fish in iran is provided.

the concept of “form of literary work” highly significant in formalism depends on the two following suggestions. 1) any part of literature, from word to speech, must be studied and known on the basis of its relationship with other parts or constitutes. thus, recognition of structural or original foundation of the works of art is the most important function of any given literary research. 2)...

flower morphology of ten fritillaria species of subgenera theresia and fritillaria growing wild in iran is studied using seventy morphological characters. qualitative and quantitative datasets separated taxa into subgenera, sectional and groups. three enigmatic species f. caucasica, f. zagrica (endemic to zagros mountains) and f. pinardii (recently reported from zagros mountains) appeared as cl...

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...