to evaluate the effect of roasting and dutching processes on the stability of b-aflatoxins (afb1+afb2), experimental units of cocoa beans contaminated with aflatoxin at a concentration of 220.7 ng g-1 were roasted at 250ºc for 15 minutes. roasting conditions caused a notable reduction in the aflatoxin content (up to 71%). the resulting cocoa liquors contaminated with 63.9 ng g-1 were thermal-al...

Objective: The study was to evaluate the antidermatophytic activity of the ethanol, ethyl acetate and hexane extract of Neem ( Azadirachta indica) leaves against dermatophytes isolated from patients with dermatophytosis. Methods: Clinical samples from 200 patients were subjected to (KOH) examination and culture isolation. Causative agents were identified macroscopically and microscopically. The...

The production of lactic acid from glycerol by means of the alkaline hydrothermal process was evaluated using high concentrations of glycerol. The operating conditions that influence the hydrothermal process were studied. Temperature (250 280 °C), catalyst to glycerol molar ratio (0.05 to 0.15), and water to glycerol volumetric ratio (0.8 to 1.5) were evaluated, as well as the use of NaOH and K...

This paper describes the e€ects of treating the alloy powder of an electrode with 6 M KOH solution containing y M KBH4 ( y = 0.0, 0.005, 0.01, 0.02 and 0.03) on the kinetic properties of the electrode, including high rate dischargeablilty HRD, exchange current density I0, symmetry factor b, limiting current density IL, di€usion coecient of hydrogen in the a-phase Da, and electrochemical polari...

This study contains a lab-scale investigation into the feasibility of applying an adsorption technique to treat wastewater polluted with lead metal simulated that exhaust from battery manufactory. Rice husks have been prepared for use in three forms; natural rice without any activation, activated carbon pretreated Sulfuric acid H2SO4, and other Potassium hydroxide KOH. Activated using KOH provi...

Abstract. Madung Z, Soloi S, Majid MHA, Sarjadi MS. 2022. Production and characterization of Imperata cylindrica paper using potassium hydroxide as pulping agent. Biodiversitas 23: 1490-1494. Non-woody plants have become an alternative fiber in production woods, the primary sources papers limited due to increasing demand year by year. or cogon grass source for pulp industry replacing wood becau...

A mixture of solid KOH in dimethyl sulfoxide has a strong basicity, but only a low nucleophilicity and is used for Q methylation of ketones. With this simple and inexpensive reagent complete methylation with yields up to 90% can be achieved. Solid KOH in dimethyl sulfoxide (DMSO) is a very strong base with a pKa-value of 27 or even higher. l-3 On the other hand, the nucleophilicity of this reag...

There is no consensus about the clinical recommendation of the time that Duraphat® varnish should be maintained on enamel surfaces without suffering mechanical disturbance by the patient. Considering the importance of calcium fluoride (CaF2)-like reservoirs on the anticaries effect of professional fluoride application, an in vitro study was designed to test the reactivity of Duraphat® varnish w...

in the present study, the kinetics of biodiesel production through transesterification of brassica carinata oil with methanol in the presence of potassium hydroxide is investigated by kinetic monte carlo simulation. the obtained results from simulation agree qualitatively with the existing experimental data. the kinetics data for each step of suggested mechanism are confirmed by simulation. by ...