stevia rebaudiana bertoni is a medicinal, perennial and herbaceous plant from asteraceae family with sweet glycosides in its leaves. salinity stress is one of the important limiters in agricultural productions. salinity influences the growth and development of plant by effect on more activities in physiological and morphological characteristics. to study the effect of salinity on morphological ...

a highly selective, rapid and economical differential pulse polarographic method has been developed for the determination of trace amounts of cadmium and lead present together in various standard alloys and biological samples after adsorption of their 1-(2-pyridylazo)-2-naphthol complexes on microcrystalline naphthalene. cadmium and lead complexes are equantitatively adsorbed on microcrystallin...

background and purpose: decreased males’ motivation for entering universities has caused a low male/female ratio in different university majors. in 2005-2006 academic year, enrollment of female students in rafsanjan university of medical sciences reached 83.14%. this tremendous gender imbalance may lead to the development of a mono-sex system for health service providers and will.affect the soc...

background: anorectal melanoma is one of the rare but significant malignancies of the anorectal area. this malignancy currently accounts for 1% of all types of melanoma and less than 1% of all the anorectal area malignancies. very rare cases of this disease have been reported worldwide. anorectal melanoma is mostly diagnosed while treating other benign conditions of this area such as hemorrhoid...

background and objectives: helicobacter pylori causes chronic gastritis, peptic ulceration, and is a risk factor for gastric cancer. more than half of the world`s population is infected with this pathogen, however the disease outcome varies. among the virulence factors of h. pylori, specific adhesions to gastric epithelium may be an important step in the induction of active inflammation. h. pyl...

artemisia annua is a medicinal annual herb that widely distributed in asia, europ, north america, and also is grown in north reagions of iran. in this study, variation in the quantity and quality of the essential oil of a.annua apical shoots at different developmental stages including vegetative, early flower opening and full flowering stages is reported. the obtained oils by hydrodistilation o...

the effects of waterlogging, sewage sludge and animal manure on the concentrations of dtpa extractable copper, iron, manganese and zinc were investigated in two different types of soil. a factorial experiment based upon a completely randomized design of two replications containing duration of waterlogging at six levels (0, 1, 3, 7, 15, 30 days), source of organic fertilizer at three levels (con...

among the 30 strains of moderately halophilic bacteria isolated from the salty effluents of textile industries around qom city in central iran, a gram-negative rod shape bacterium designated as strain ip8 showed a remarkable ability in decolorizing of azo dyes over wide ranges of ph (7-11) and temperature (25-45 ºc), in presence of nacl and na2so4 (0.5-1.5 m) under anaerobic and aerobic conditi...

cellulose was applied as a reusable and green catalyst for the facile four-component synthesis of 6-amino-4-aryl-3-methyl-1,4-dihydropyrano[2,3-c]pyrazole-5-carbonitrile derivatives using hydrazine monohydrate, ethyl acetoacetate, malononitrile and aryl aldehydes, under solvent-free and thermal conditions. the use of non-toxic and inexpensive catalyst, short reaction time, clean work-up and goo...

experimental  autoimmune  encephalomyelitis (eae)  is  a  mouse  model  for  multiple sclerosis (ms), this autoimmune disease is mainly mediated by adaptive and innate immune responses that lead to an inflammatory demyelination and axonal damage. imatinib mesylate is a  selective protein  tyrosine kinase inhibitor  with immunomodulatory  properties  that abrogates multiple signal transduction p...