optimization of the isolation methods and utilization of the sugars present in the hydrolysates obtained from pre-hydrolyses of various lignocellulosic materials for production of new chemicals and energy is currently accounted for novel methods of biorefinery all over the world. in this study, effect of temperature (90 and 100 oc), koh concentration (2, 4 and 6 %) and polyoxyethylene (80) sorb...

Direct plating or cold enrichment or both have been used to isolate Yersinia spp. from feces. Freeze-shock double enrichment and KOH treatment have been recommended for recovery of Yersinia enterocolitica from surface waters and food, respectively. These techniques were evaluated as alternatives for rapid recovery of Yersinia spp. from feces. Stool samples were homogenized in buffered saline an...

In this paper the effect of concentration of KOH solution containing 0.02 M borohydride on the electrochemical properties of Ml(NiCoAl) hydrogen storage alloys, including the high rate dischargeability, exchange current density I , limiting current density I , 5 0 L and diffusion of hydrogen in the hydride, by means of linear polarization, anodic polarization, cathodic polarization, and electro...

The new platelet antiaggregant Triflusal or 2-acetoxy-4-trifluoromethylbenzoic acid presents a structural analogy to acetylsalicylic acid (ASA). Alkaline hydrolysis of triflusal was studied in the presence and absence of cationic micelles of N-cetyl-N-ethyl-N,N-dimethylammonium bromide (CDEABr) at different KOH concentrations and different temperatures (25, 30, and 37 degrees C) using a spectro...

Bismuth telluride (Bi2Te3) nano particles were prepared by refluxing method in different conditions such as varying concentration of KOH and reaction timings. X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements have been performed for structural and phase formation studies. The nanoparticles are showing the same structure of bulk except broadening of peak confirmed b...

The forces between a flat polystyrene film and a polystyrene sphere have been measured in water and solutions of KCl and KOH. All force–distance curves show at distances >5–50 nm an electrical double-layer repulsion whose range and strength depend on the electrolyte concentration. The electrical double-layer potential at the polystyrene surface coincides with its zeta potential. An attractive f...

BACKGROUND Fatty acids (FAs) are important as raw materials for the biotechnology industry. Existing methods of FAs production are based on chemical methods. In this study potassium hydroxide (KOH)-catalyzed reactions were utilized to hydrolysis Jatropha curcas seed oil. RESULTS The parameters effect of ethanolic KOH concentration, reaction temperature, and reaction time to free fatty acid (F...

BACKGROUND Insufficient data exist on the production of compound A during closed-system sevoflurane administration with newer carbon dioxide absorbents. METHODS A modified PhysioFlex apparatus (Dräger, Lübeck, Germany) was connected to an artificial test lung (inflow at the top of the bellow approximately/= 160 ml/min CO2; outflow at the Y piece of the lung model approximately/= 200 ml/min, s...

Removal of Pb 2+ from aqueous solutions using coconut shell carbons produced by KOH activation is performed in this paper. Morphology and pore structure characteristic of coconut shell carbons are analyzed by SEM and nitrogen adsorption techniques. Effects of adsorbent concentration, agitation time and initial ion concentration on the adsorption behavior are investigated, and adsorption isother...

Bismuth&d platinum electrodes were investigated as pH indicating electrodes in strong KOH solutions (pH 14-16). The E-pH curve of freshly prepared bismuth electrodes is linear, but the E-pH slope altered with time. It is shown that the slope is constant if the bismuth electrode has been aged via immersion in a concentrated KOH solution. The value of the E-pH slope depends on the KOH concentrati...