Results 51 to 60 of about 96,684 (239)

Biomineralization in Cave Bacteria—Popcorn and Soda Straw Crystal Formations, Morphologies, and Potential Metabolic Pathways

open access: yesFrontiers in Microbiology, 2022
Caves are extreme, often oligotrophic, environments that house diverse groups of microorganisms. Many of these microbes can perform microbiologically induced carbonate precipitation (MICP) to form crystalline secondary cave deposits known as speleothems.
Keegan Koning   +8 more
doaj   +1 more source

Synthesis, enzyme inhibition and anticancer investigation of unsymmetrical 1,3-disubstituted ureas [PDF]

open access: yesJournal of the Serbian Chemical Society, 2014
In this research work seventeen urea derivatives, including five new derivatives N-mesityl-N'-(3-methylphenyl)urea (2), N-(3-methoxyphenyl)-N'-(3-methylphenyl)urea (4), N-mesityl-N'-(4-methylphenyl)urea (6), N-(1,3-benzothiazol-2-yl)-N'-(3 ...
Mustafa Sana   +2 more
doaj   +1 more source

Thermodynamics and Kinetics of pH-dependent Dissolution of Sparingly Soluble Alkaline Earth Hydroxides in Source-Separated Human Urine Collected in Decentralised Sanitation Systems

open access: yesFrontiers in Environmental Science, 2022
Alkaline earth hydroxides are widely used in water and wastewater treatment. Within the emerging niche of source-separating sanitation, these chemicals have found a new application—to prevent urease-catalysed degradation of urea present in freshly ...
Prithvi Simha   +3 more
doaj   +1 more source

The competitive inhibition of of the urease-catalyzed hydrolysis of urea by phosphate [PDF]

open access: yes, 1949
The urease-catalyzed hydrolysis of urea has been found to be competitively inhibited by phosphate at pH 7.0 and 25°. The Michaelis constant of the urea-urease system has been found to be approximately 0.003 M urea and the comparable constant defining the
Harmon, Kent M., Niemann, Carl
core  

Diatom Proteomics Reveals Unique Acclimation Strategies to Mitigate Fe Limitation [PDF]

open access: yes, 2015
Phytoplankton growth rates are limited by the supply of iron (Fe) in approximately one third of the open ocean, with major implications for carbon dioxide sequestration and carbon (C) biogeochemistry.
Boyd, Philip W.   +7 more
core   +1 more source

MICROBIOLOGICAL ACTIVITY DURING THE COMPOSTING OF WASTES FROM BROILER PRODUCTIVE CHAIN [PDF]

open access: yesEngenharia Agrícola, 2018
The quality of the carbon used as bulking agent in the composting process directly affects the dynamics of the waste degradation, which is governed by an active and diversified microbiota.
Francieli H. Bernardi   +4 more
doaj   +2 more sources

Inhibitors of bacterial and plants urease [PDF]

open access: yes, 2013
Urease is an important virulence factor for Helicobacter pylori and Proteus mirabilis as well as in environmental transformations of certain nitrogenous compounds.
Macegoniuk, Katarzyna
core   +1 more source

Efficacy of soybean-derived crude extract in enzyme-induced carbonate precipitation as soil-improvement technique

open access: yesInternational Journal of Geo-Engineering
Calcium carbonate precipitation using a urease enzyme, referred to herein as Enzyme-Induced Carbonate Precipitation (EICP) is a technique for soil improvement. In this technique, a mixed solution composed of reagents and the urease enzyme, which produces
Galih Bhekti Sula Pratama   +6 more
doaj   +1 more source

Extraction of high activity bacterial urease and its application to biomineralization of soil

open access: yesJournal of Rock Mechanics and Geotechnical Engineering
Biomineralization based on bacterial enzyme induced carbonate precipitation (BEICP) process is a promising alternative to cement-based ground treatment technology.
Hanjiang Lai   +4 more
doaj   +1 more source

Extraction and Characterization of Urease from Durio zibethinus L

open access: yesJurnal Kimia Valensi, 2021
Urease is a biocatalyst that serves to hydrolyze urea into ammonia and carbon dioxide. Since it is an imported product, the price of urea is still high. Urease can be found in grains. One of the grains that has not been explored for its urease content is
Zusfahair Zusfahair   +3 more
doaj   +1 more source

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