nanocrystalline zinc oxide (zno) powders with different morphology have been successfully synthesized by using different surfactants such as cetyl trimethyl ammonium bromide (ctab), sodium dodecyl sulphate (sds), and tri ethanol amine (tea) via hydrothermal method. the products were characterized by means of powder x-ray diffraction (xrd), scanning electron microscopy (sem), transmission electr...

In this study the influence of dicarboxy acetone (DCA), as an oxidation product of sodium citrate, was evaluated by ‘reversed Turkevich’ method in this study. Gold nanoparticles (GNPs) were synthesized systematically at various sodium citrate to HAuCl4 molar ratio and temperature. TheseThe GNPs were characterized by UV-vis spectroscopy, DLS and TEM techniques. The results showed that by reversi...

the purpose of this study is comparison of manganese absorption capacity by natural and modified zeolite. for this purpose used by from semnan mines zeolite with mean particle diameter of 360 micrometer. for modified zeolite, 5 g amount of natural zeolite with 100 ml of 1 m sodium chloride solution mixed and maintained at 24 hours in room temperature. for measure specific surface of absorbents,...

Abstract This study aims to determine the effect of activator-binder ratio on water absorption ambient-cured geopolymer concrete. Class F fly ash from Mpanau power plant was used as precursor. raw material activated by a mixture sodium silicate and hydroxide solution, with an 0,45; 0,50; 0,55; 0,60. Five percent replacement slaked lime added achieve ambient curing. The test specimen for is made...

A perfusion technique with a proximal occluding balloon has been used to study the absorption of glucose, sodium, and water from the human jejunum at different rates of flow. The absorption of glucose and water was significantly higher with the balloon deflated than inflated, probably because of reflux of infused solution above the point of infusion. Above the inflated balloon 0 to 4.2 ml/min o...

The utilization of used polystyrene as adhesive material for emulsion polymer asphalt has been carried out. Polystyrene foam was dissolved in toluene at the ratio 30:70 mL, then solution mixed with aquadest ratios 90: 10 70: 30 50: 50 and 10: 90 mL. Then added mL Sodium Dodecyl Sulfate concentrations 10%, 20%, 30%. most stable latex 200 g sand aggregate volume 20 40 mixture pressed into a hotpr...

in order to study of effects of sodium bicarbonate on lameness occurrence and the performance of feedlot cattle, 100 holstein bull calves (251.75 ± 5.75) were used in a completely randomized design. calves were group fed a similar basal diet during 42 days experimental period. used treatments included 1) control treatment without feed additive, and 2) experimental diet that calves consumed 50 g...