Let $R$ be a commutative ring with identity. An ideal $I$ of a ring $R$is called an annihilating ideal if there exists $rin Rsetminus {0}$ such that $Ir=(0)$ and an ideal $I$ of$R$ is called an essential ideal if $I$ has non-zero intersectionwith every other non-zero ideal of $R$. Thesum-annihilating essential ideal graph of $R$, denoted by $mathcal{AE}_R$, isa graph whose vertex set is the set...

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...

The genus Sterigmostemum M. Bieb. belongs to the tribe Hesperideae of the Brassicaceae family. The results of this research confirmed the recognition of five species in Iran: S.incanum, S. sulphureum,  S. ramosissimum,  S. acanthocarpum  and S. longistylum. S. laevicaule is excluded from the genus Sterigmostemum and is regarded as a synonym of Erysimum crassicaule. The new combination, namely, ...

Objective: The genus Ferula L. includes perennial flowering plants belonging to the Apiaceae family. This genus is a rich source of biologically active phytochemicals such as sulfur-containing derivatives, coumarins, sesquiterpenes, sesquiterpene lactones, sesquiterpene coumarins, glucuronic acid, galactose, arabinose, rhamnose, and daucane esters. Over the last decade, considerable attention h...

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.

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...

the genus calomyscus has long been considered monotypic and represented by the species c . bailwardi. finally in the most recent revision, eight geographic species were recognized: c . bailwardi, c. baluchi, c. elburzensis, c. grandis, c. hotsoni, c. mystax, c. tsolovi, and c . urartensis. since the taxonomic status of this genus remains somewhat controversial, karyological analysis may provide...

among the recently collected chalcidoid wasps in a rice field of eastern guilan province (coast of caspian sea), in july 2012, there was a specimen of pteromalidae belonging to the genus callitula. it was identified as callitula ferrierei (bouček, 1964). both genus and species are new record for iranian fauna. morphological characters and geographical distribution of the newly recorded species ...