in the present study, 2, 4-dichlorophenoxyacetic acid (2, 4-d) was assessed individually for its effectiveness to induce somatic embryogenesis in tea (camellia sinenesis l.). embryonic axes and cotyledons explants were dissected from the seeds. explants were cultured on murashige and skoog (ms) medium containing 0, 1 and 5 mm 2, 4-d alone for embryonic axes and 0, 1 and 5 mm 2, 4-d along with 0...

a new kinetic spectrophotometic method for the determination of trace amount chromium (iii) in teareal samples has been described based on it s the catalytic effect on the oxidations of 1 - ( 2 –pyridylazo ) - 2 - naphthol, (pan), by potassium bromated in sulfuric acid. the reaction is followedspec- trophotometrically by measuring the decrease in the absorbance at 469 nm. under the optimumcondi...

palm date leaves were processed with lime in a processing reactor in a factorial arrangement of treatments (3 × 3) with 3 levels of temperatures (40, 80 and 100°c) and time periods (80, 160, and 240 minutes) in a completely randomized design. fermentation parameters measured using gas production technique. with increasing pretreatment time and temperature lignin content reduced from 13.0 percen...

objective: periapical granulomas (pgs) and radicular cysts (rcs), as the most common odontogenic lesions have yet unclear pathogenesis. this study was aimed to compare pcna and ki-67 expression in pgs and rcs and evaluate their possible relationship with two lesions. methods: in this cross-sectional descriptive study, twenty pgs and twenty rcs were evaluated immunohistochemically using an anti-...

plant extracts are rich sources of natural antioxidant and antibacterial compounds. in recent decades, the need for using natural antioxidants in foods, pharmaceuticals and cosmetics has promopted extensive scientific research. the purpose of this study was to investigation of effect of different percentages of rosemary extract (0, 1, 2.5 and 5%) on the quality, chemical and microbial of the pr...

we report herein the development of a highly sensitive colorimetric method for the detection of 4-hydroxy-2-mercapto-6-methylpyrimidine (mtu) which acts as an anti-thyroid drug utilizing citrate capped gold nanoparticles (au-nps). this thiol-containing molecule exhibits intriguing affinity with au-nps. the reactivity involves the displacement of the citrate shell by the thiolate shell followed ...

the aim of this study was to investigate the barrier properties of cellulose nanocrystals-pvananocomposites. nanocomposite films with different filler loading levels (3, 6, 9 and 12% by wt) weredeveloped by solvent casting method. the effect of cellulose nanocrystals on the barrier properties ofthe nanocomposites was studied. to this end, moisture absorption, water vapor permeability (wvp),oxyg...

background: pre-eclampsia (pe) is a pregnancy associated disorder characterized by hyper-tension and proteinuria. the first 2 stages of pe cause dysfunction in uteroplacental perfusion and oxidative stress while the third stage of pe is due to the release of inflammatory and angiogenic factors, which could lead to maternal endothelial damage and systemic inflammatory response. in this study, we...

gracilariopsis persica (rhodophyta) is one of the most abundant algae, introduced newly from the indian ocean. in this study,   the main sterols of the algae have been isolated and identified. separation and purification of the compounds was carried out on silica gel and sephadex lh20 column chromatography (cc) and high performance liquid chromatography (hplc) to obtain five pure compounds 1-5....

to compare the efficacy of acupressure wrist bands, ondansetron, metoclopramide and placebo in the prevention of vomiting and nausea after strabismus surgery. two hundred patients, asa physical status i or ii, aged between 10 and 60 years, undergoing strabismus surgery in farabi hospital in 2007-2008 years, were included in this randomized, prospective, double-blind and placebo-controlled study...