silicon has useful effects on growth and yield of many plants. the aim of the present study is to investigate the impact of nano silicon oxide on proliferation and improvement of some growth traits of apple, cultivar gala. thus, an experiment was designed based on completely randomized design (crd) with five levels of nano silicon oxide concentrations (0, 25, 50, 100 & 200 ppm) in five replicat...

n-oxidation of 1,4-dihydro-2,6-dimethyl-1- phenyliminopyridine (7) with several peracids was attempted. the main compound obtained was l-phenyl- 2,6-dimethyl-4-pyridone (8), instead of the expected n-oxide (2). the reaction of phenylhydroxylamine with dimthylrnethoxypyroxonium perchlorate, however, successfully gave the n-oxide (3), which belongs to a class of nitrones in which the diazomethine...

Cobalt Oxide/ Zinc Oxide nanocomposite was synthesized by dropwise addition ofCo(NO)3.6H2O and Zn(NO3)2.4H2O solutions to KOH solution at different temperatures followed bycalcination at 300ºC for 4 h. The morphology and structure of nanoparticles and the influence oftemperature on particle size were studied using scanning electron microscopy (SEM) and X-RayDiffraction (XRD). Minimum particle s...

estrogen replacement therapy (ert) in postmenopausal women may decrease the risk of coronary artery diseases (cad). we hypothesized that nitric oxide (no) releasing due to ert may be the essential factor by which endothelial permeability decreases. four groups of ovariectomized rabbits were under investigation for five weeks. groups 1 & 4 received high cholesterol diet and other two groups (2 &...

in this research zinc oxide (zno) nano-crystalline powders were prepared by sol-gel method using zinc acetate. the zno nanoparticles were characterized by x-ray diffraction (xrd), scanning electron microscopy (sem), ultraviolet-visible (uv-vis), fourier transform infra-red (ft-ir) and energy dispersive x-ray (edx) spectroscopy. the structure of nanoparticles was studied using xrd pattern. the c...

the interaction of copper oxide nanoparticles and copper ions and proteinase k from tritirachium album limber has been investigated employing uv spectroscopy and kinetics measurements. the aim of this study was to evaluate the effect of nanoparticles of cuo for proteinase k. in this paper we compare the effect of copper oxide nanoparticles with the effect of copper ions on proteinase k stabilit...

in this study the effect of nitric oxide synthesis inhibition on stress-induced gastric damage was evaluated in bile duel ligated, sham operated and unoperated rats. animals were injected intraperitoneally with ng-nitro-l-arginine methylester (l-name), 40 mglkg, l-argininc, 200 mg/kg or saline, 30 min before water-immersion stress. one hour after water immersion, the animals were killed and the...

objective: zinc oxide eugenol (zoe) under composite restorations should be covered with a suitable material in order to prevent the harmful effect of zoe on the composite. the aim of this in vitro study was to evaluate microleakage of composite restorations in pulpotomized primary molars with different bases for covering the zoe layer and to assess the distance between different layers. materia...