Abstract This article studied the characteristics of vermiculite sourced from the Tebinbulok mine situated within the borders of the Republic of Uzbekistan, as well as the most favorable conditions for its activation through heating and treatment. A 7% solution of hydrochloric acid was used for activation. Activated vermiculite was modified using maleic anhydride and polyacrylonitrile […]
Abstract An accurate and simple indirect spectrophotometric method has been created for the micro- determination of Methyldopa (MDP) and Dopamine hydrochloride (DA) in acidic media. The method was based on the catalytic oxidation reaction between Orang-G and N-bromosuccinimide in an acidic medium which could be used to create an indirect spectrophotometric method for the micro […]
Abstract In the present study, office waste paper was employed as feedstock for bioethanol production. Lignocellulosic material was pre-treated with dilute sulphuric acid (5 %) to release monomeric sugars. Acid pretreatment of waste papers was carried out at different ratios of 10, 15, and 20 ml for each 1 gm of raw material to obtain […]
Abstract This study included the preparation of Schiff base derivatives (Z1-Z5) derived from 2- bromoisophthaladehyde with aniline substitutes. By the reaction of prepared compounds with sodium azide using dioxane as a solvent a pentacyclic rings derived from tetrazole (Z6-Z10) were obtained. The prepared compounds (Z6-Z10) were characterized through measurements of fluorescence infrared (FTIR) spectra and […]
Abstract The impact of the depth of selection of narrow gas oil fractions of Azeri-Chirag-Guneshli oils on the yield and quality of catalytic cracking products was studied. The impact of fractional and group hydro- carbon composition on the main directions of cracking is analyzed. 5 types of gas oil fractions selected in the range of […]
Abstract The effectiveness study results related to "soft" multi-stage crushing mode of concrete scrap are presented. During the research it was found that the processing of concrete scrap using this technology can significantly improve the characteristics of the secondary concrete aggregate, namely crushability, water absorption and voids. It is achieved by reducing the content of […]