hyalomma and haemaphysalis are two most important genera of ticks (acari: ixodidae). the rapid and accurate identification of field collected specimens is crucial in faunal works, laboratory assays, anti-tick vaccine experiments, etc. the present study was designed to introduce a rapid and more sensitive method for the differentiation of closely related hyalomma and haemaphysalis species namely...

Organisms are constantly exposed to many different forms of reactive oxygen species and reactive nitrogen species that damage proteins, nucleic acids, and lipids, leading to loss of biological function. The possibility that reactive oxygen/nitrogen-mediated protein damage contributes to the aging process is supported by results of many studies showing that aging is associated with the accumulat...

during a comprehensive study of the genus stenus (staphylinidae) along streams and river banks in iran, some ground beetles (carabidae) were also collected. in the high mountain areas along the iranian-turkish border in the province of azarbayan -e gharbi, a nebria and a deltomerus species were found. these nebria and deltomerus species were clearly different from known iranian species, but rel...

  Phelipanche pouyanii is described here as a new species from South Khorassan Province, East of Iran. Its diagnostic morphological features are the calyx teeth being far longer than the calyx tube and staminal filaments being glabrous. These characters clearly differentiated the new species from its closely related taxa, i.e., P. mutelii, P. angustelaciniata and P. nana. Results obtained from...

A fundamental impact of mitochondria on biological aging has been suggested decades ago. One prominent theory explains aging as the result of the age-related accumulation of random molecular damage of biomolecules resulting from the reaction of reactive oxygen species, the majority of which are generated in mitochondria. Although this concept appeared to be very attractive and strongly influenc...

The identification and study of long-lived mutant animals has provided valuable insights into the mechanisms that limit the life-span of organisms. Findings with the gene SIR2 suggest that the rate of aging can be regulated under certain conditions. Indeed, increased expression of SIR2 lengthens life-span by acting on biological processes that promote survival under conditions of scarcity. In a...