a novel rice-husk-silica supported n-propyl bipyridinium chloride (rhprbpcl) has been prepared. due to the basicity of rhprbpcl, it was decided to evaluate its catalytic activity in the one-pot preparation of tetrahydrobenzo[b]pyran, dihydropyrano[3,2-c]chromene and dihydropyrano[4,3-b]pyran derivatives. the catalyst was characterized by ft-ir, sem and tga analyses. this methodology offers seve...

lamno3 and lamno3/zsm-5 nano catalysts were synthesized by pechini method and their physical-chemical properties were characterized using xrd, ftir, sem-edx, uv-vis drs, bet surface area and tpr. the correlation between characteristic properties and activity of catalysts were investigated. the catalytic performance of the catalysts was evaluated in combustion of 2-propanol and compared with 1% ...

background: il-10 is an anti-inflammatory cytokine which is involved in tumorigenesis. over production of il-10 and elevated number of il-10 generating mononuclear cells in breast tumor tissue has already been shown. objective: to determine the association of il-10 promoter polymorphisms with increased risk of breast cancer and its association with breast cancer prognostic factors. methods: per...

the variants of angiotensin converting enzyme (ace) and matrix metalloproteinases (mmps) genes might be involved in the pathogenesis of end stage renal disease (esrd) and hypertension. we studied the ace insertion/deletion (i/d) and mmp-7 a-181g variants in 99 unrelated esrd patients and 117 individuals without renal complications from western iran with kurdish ethnic background. the frequency ...

background: breast cancer is the most common cancer in women, containing approximately one third of all illnesses in women. assessment of molecular markers is valuable in predicting the outcome of disease and decision making for optimal treatment. the purpose of this study was to determine the relationship between estrogen and progesterone receptors with her-2, ki67, p53, and clinicopathologica...

objective(s): neuroinflammation in parkinson disease (pd) is associated with glial cells activation and production of different inflammatory cytokines. in this study, we investigated the effect of chronic administration of 8-oh-dpat on 6-ohda-induced catalepsy and levels of inflammatory cytokines in cerebrospinal fluid (csf).   materials and methods: catalepsy was induced by unilateral infusion...

two simple visible spectrophotometric methods are developed and validated for the quantification of modafinil using 1,2-naphthoquinone-4-sulphonic acid (nqs method) and 2,4-dinitrophenol (dnp method) as analytical reagents. the nqs method involves the reaction of modafinil with 1,2-naphthoquinone-4-sulphonate in alkaline medium at room conditions to form a yellow colored product exhibiting maxi...

in this study, a simple and low-cost method was developed for extraction and pre-concentration of brilliant blue(bb) and tropaeolin o(to) in food samples using cloud point extraction (cpe) prior to spectrophotometric determination. the effects of main factors such as ph, surfactant and salt concentrations, incubation time and temperature on the cloud point extraction of both dyes were investiga...