this study concerns the cytotaxonomic investigations on twelve species belonging to three sections from the genus vicia in iran. a taxonomic background of the genus is given in brief. the previous counts reported for the genus in index to plant chromosome number are summarized. in addition to one new count, the chromosome numbers of four species are reported for the first time. briefly, the res...

Francisella tularensis is the intracellular gram-negative coccobacillus that causes tularemia, and its virulence and infectiousness make it a potential agent of bioterrorism. Previous studies using mononuclear leukocytes have shown that the lipopolysaccharide (LPS) of F. tularensis is neither a typical proinflammatory endotoxin nor an endotoxin antagonist. This inertness suggests that F. tulare...

A number of microorganisms have the ability to degrade cellulose, agar, bacterial polysaccharides, and blood group substances. The Myxococcus of Morgan and Thaysen (1933) was shown to split blood group A substance in horse saliva but not the A substance in peptone (Landsteiner and Chase, 1935a, b). It also attacked the specific polysaccharide of Shigella dysenteriae (Shiga and Flexner), pneumoc...

new evidence gained by the study of foraminifera from khuzestan province in southwest iran reveals that the basal limit of the genus heterostegina is not restricted to the eocene epoch. by introducing a new species of this genus (h. rezvaninejadi), this study shows that the early appearance of this genus should be lowered down further still, at least, into the middle paleocene.

Due to the importance of the Arasbaran forest (E. Azarbaijan, N.W. Iran) as a biosphere preserve and having a rich flora and fauna, macrofungi flora of Arasbaran region, were studied from 2003. This is the first in a series of publications on floristic studies of macrofungi of Arasbaran forests. In this paper, species of the genus Cortinarius, subgenus Myxacium are studied.The genus Cortinarius...

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The genus Thymus L. belongs to the Lamiaceae family, consist of about 215 species of herbaceous perennials and small shrubs in the world. They originated from Mediterranean region. This genus is presented in Iranian flora by 14 species, including: T. daenensis, T. carmanicus, T. fallax, T. persicus, T. trautvetteri, T. migricus, T. kotschyanus, T. pubesens, T. nummularius, T. trans...

Euphorbia is a genus of flowering plants belonging to the family Euphorbiaceae. Consisting of 2008 species. The genus Euphorbia produces an irritant, which constitute a health hazard to humans and livestock. The genus Euphorbia is one of the largest and most complex genera of flowering plants, however, several botanists have made unsuccessful attempts to subdivide it to smaller genera.  Many Eu...

The genus Cyperus belongs to tribe Cypereae, subfamily Cyperoideae and family Cyperaceae that is the largest genus in this family after Carex. The classification of genus Cyperus is still unsettled because of morphological variations and therefore, makes determination of subgenera boundaries and species difficult. In Flora Iranica (KUKKONEN 1998) this genus was divided to six subgenera. In this...