This work aims to study the physical, chemical, and thermal properties of natural fibers extracted from Pennisetum alopecuroides plant. The was carried out on raw treated assess improvements that facilitate future uses in composites. alkaline treatment using NaOH with different concentrations (1, 3, 5, 10%) for 2 hours. Hydrothermal performed at immersion times a water bath 100°C. chemical comp...

A micell-mediated phase separation method for preconcentration of ultra-trace quantities of mercury as a prior step to its determination by UV-Vis spectrophotometry has been developed. The method is based on Hg(II)-dithizone complex formation in alkaline aqueous solution, and extraction of this Hg(II)-dithizone secondary complex into the surfactant-rich phase of the non-ionic surfactant oct...

1. Analyses were made of the K and HCO(3) content, the irritability, and weight change of isolated frog sartorius muscles after immersion for 5 hours in Ringer's solutions modified as to pH and potassium content. 2. At each pH a concentration of potassium in the solution was found which was in diffusion equilibrium with the potassium in the muscle. In greater concentrations potassium moved into...

Compared to studies of water extracts of plants, those utilising alkaline extracts are limited. Both water and alkaline extracts from licorice root were compared regarding their biological activities. Licorice root was successively extracted first with water or alkaline solution (pH 9 or 12), and the alkaline (pH 12.0) extract was further separated into 50% ethanol-soluble and -insoluble fracti...

1. Purified alkaline phosphatases from cow's milk and calf intestinal mucosa quantitatively convert TPN into DPN. DPN is not hydrolysed by either enzyme. 2. These results confirn that the third phosphate grouping of TPN is esterified (to ribose), since the action of both purified phosphatases is restricted to phospho mono-esters and amides. 3. Under the experimental conditions used, there was n...

Impedance biosensor chips were developed for detection of Escherichia coli O157:H7 based on the surface immobilization of affinity-purified antibodies onto indium tin oxide (ITO) electrode chips. The immobilization of antibodies onto ITO chips was carried out using an epoxysilane monolayer to serve as a template for chemical anchoring of antibodies. The surface characteristics of chips before a...

This paper presents the results of investigations into modeling DC and dynamic characteristics an alkaline electrolyzer. A model device under consideration is proposed in form analytical relationships which coefficients depend on concentration potassium hydroxide solution contained electrolyzer consideration. The correctness verified by comparing calculated measured current–voltage dependence m...

The benefits of increasing the number of surface hydroxyls on TiO₂ nanoparticles (NPs) are known for environmental and energy applications; however, the roles of the hydroxyl groups have not been characterized and distinguished. Herein, TiO₂ NPs with abundant surface hydroxyl groups were prepared using commercial titanium dioxide (ST-01) powder pretreated with alkaline hydrogen peroxide. Throug...

In recent years increased concentrations of the polyamines putrescine, spermidine and spermine have been reported in body fluids from humans and animals with a variety of malignant disorders. In addition, changes occurring in the spermidine/putrescine ratio in urine from cancer patients receiving chemotherapy appeared to provide an indication of the success or failure of the particular chemothe...

Abstract A new method of preparation aqueous electrolyte baths for electrochemical deposition nickel targets medical accelerators is presented. It starts with fast dissolution metallic Ni powder in a HNO 3 -free solvent. Such obtained raw solution does not require additional treatment aimed to removal nitrates, such as the acid evaporation and salt precipitation-dissolution. used directly plati...