The work is devoted to the problem of increasing gas condensate production in fields. It was found that ammonium carbonate salts, absence calcium chloride type waters, interact with rocks, increase permeability reservoirs. Solutions salts when interacting formation water form chemically precipitated chalk pore space, while rocks decreases. A set experimental studies carried out study displacing...

In this study, a low-ammonium enzyme-induced carbonate precipitation (LA-EICP) technique is proposed that utilizes the cation exchange capability of zeolite to remove ammonium, an environmentally harmful by-product urea hydrolysis. The LA-EICP process modified (EICP) suitable for soil stabilization, by mixing and resulting solution amounts calcium precipitated ammonium ions removed synthetic ca...

THE final phase of amino-acid metabolism, involving the removal of nitrogen from the amino-group and the production of urea, is generally regarded as involving two distinct processes: (1) deamination, with the liberation of ammonia, (2) dehydration of ammonium carbonate, with formation of urea. The change being represented as: R. CH(NH2) . COOH NH3 (NH4C03CON2H4 Now, while there is no doubt as ...

a mild and efficient one-pot three-component and environmentally benign approach for the synthesis of a wide range of hydantoin annulated derivatives has been described. a multi-component reaction between a carbonyl compounds (ketone or aldehyde), potassium cyanide and ammonium carbonate (as cyanating agent and amine source, respectively leads to the formation of hydantoins. the proposed optimi...

Natural kaolinite obtained from Share, Nigeria was treated with ammonium carbonate to enhance the adsorption capacity. The optimum operating conditions for of metal ions on natural clay (SK clay) were employed carbonate-treated (SK-AC clay). data analysed using isotherm and kinetic models. statistical p-values less than 0.05, indicating that model terms are significant ions. pseudo-second-order...

Abstract One of the challenges in biofuel production from lignocellulosic wastes is to improve its conversion solvents; therefore, new strategies enhance xylose uptake are required due be secondary abundant sugar. In this context, a novel fermentation strategy integrating co-culture Clostridium acetobutylicum and Saccharomyces cerevisiae with pH control was developed. Initially, two different b...

Microorganisms and their biomineralization processes are widespread in almost every environment on earth. In this work, Streptomyces luteogriseus DHS C014, a dominant lithophilous actinobacteria isolated from microbial mats on limestone rocks, was used to investigate its potential biomineralization to allow a better understanding of bacterial contributions to carbonate mineralization in nature....

Fermentation characteristics, previously studied in shake flasks, were reproduced in aerated-agitated fermenters, using three strains of Streptomyces sp. which had been selected for their high antimycin A productivity in shake flasks. Fermentation in fermenters was run in three stages. The medium consisted of soy flour, glucose, ammonium sulfate and calcium carbonate; initial pH was 7.2 approxi...