our aim in this work is the synthesis and study optical and structural properties of gold nanoparticles.gold (iii) chloride trihydratewas taken as metal precursor, ascorbic acid at the presence of an appropriate amount of naoh as reducing agent and polyvinylpyrrolidonek-30 (pvp k-30) as a stabilizing and capping agent. the reaction was performed in high-speed stirring rate at room temperature.s...

mercury is quantitatively retained with 1, 5-diphenylcarbazone (dpc) on microcrystallinenaphthalene in the ph range 6.5-8.5 from a large volume of aqueous solutions of various samples.after filtration, the solid mass consisting of the mercury complex and naphthalene was dissolvedin 5.0 ml of dimethylformamide (dmf) and mercury was determined by spectrophotometricmethod at 542 nm against the rea...

in this work, zncao2 (zinc oxide-calcium oxide) nanocomposite were synthesized at different temperatures (500-700°c) by sol-gel method based on polymeric network of polyvinyl alcohol (pva). the synthesized samples were characterized by sem/edax, ft-ir and xrd techniques. it was found that synthesized nanocomposites have 1.62, 2.05 and 13.91%wt of cao, respectively. the obtained results show tha...

background: the cuprizone multiple sclerosis (ms) animal model is characteristic for toxic demyelination and represents a reversible demyelination and remyelination system. it has been shown that green tea epigallocatechin-3-gallate (egcg) might be effective in improving the symptoms and pathological conditions associated with autoimmune inflammatory diseases in several animal models. objective...

introduction during the process photodynamic therapy (pdt), bleaching of photosensitizer induced by irradiation and generation of reactive oxygen species (ros) can provide some information concerning the efficiency of treatment. since gold nanoparticles (gnps) have been highlighted as efficient drug delivery systems, in this study, by utilizing gnps conjugated with 5 aminolevulinic acid (5-ala-...

nano-zeolite coapo-5 as a member of afi family, was synthesized via a hydrothermal treatment, and structurally characterized using x-ray diffraction (xrd), scanning electron microscope (sem), and energy dispersive x-ray analysis (edax). the effects of crystallization temperature and time on the structure of these powder products were studied. xrd patterns of the synthesized powders revealed a h...

background: colorectal cancer is one of the most important causes of morbidity and mortality in the world. it has been suggested that tissue inhibitor of metalloproteinase-1 (timp-1) plays a particular role in cancer promotion. the objective of the present study was to compare the effect of repeated measurement of carcinoembryonic antigen (cea) and timp-1 plasma levels in a follow-up response t...

improving the processing and the recycled paper properties is one of permanent concern of papermaking. in this research, the effect of nanochitosan addition on the process and product quality made of writing and printing recycled fiber was investigated. being nano size and so its capability in access to the space between pulp suspension components and also its probable ability to make electrost...

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: human cripto-1, a member of the egf-cfc family, is involved in embryonic development, embryonic stem cell maintenance, and tumor progression. it also participates in multiple cell signaling pathways including wnt, notch, and tgf-β. remarkably, it is expressed in cancer stem cell (csc) compartments, boosting tumor cell migration, invasion, and angiogenesis. although cripto-1 is overe...