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Showing 1 to 16 of 16 for “"urease activity"”.
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Ammonia Volatilization and Urease Activity in Turf
Experiments were conducted with recently developed turf microecosystems to determine the extent and mechanisms of NH(,3) volatilization from turf whose underlying soil had an acidic pH. Eight different nitrogen fertilizers were evaluated for NH(,3)-N losses after application to turf. The rate and …
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The Locus of Urease Activity in The Soil
Made available in DSpace on 2014-12-10T17:12:41Z (GMT). No. of bitstreams: 1 6910817.pdf: 3215758 bytes, checksum: bab5e8de6c5ec94aafae1c2f6e62aab3 (MD5) Previous issue date: 1968
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The Utilization of Post-Harvest Urea Sprays by Senescing Apple Leaves, Changes in Urease Activity, and The Effect of Urea Sprays Upon Subsequentyield
Made available in DSpace on 2014-12-12T00:57:21Z (GMT). No. of bitstreams: 1 7219929.pdf: 2255103 bytes, checksum: 4bd0a78f3be8b9fbef3be0e6d0632be3 (MD5) Previous issue date: 1972
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Detection, Activity Measurement and Phylogeny of Ureolytic Bacteria Isolated from Elasmobranch Tissue
… to their preferred habitats and feeding habits. Urease presentence and activity was detected in phylogenetically diverse bacterial strains. Species with high urea-hydrolyzing ability, such as <em>Micrococcus</em> <em>luteus</em> (shark blood isolate: 46.84 mU/mg protein; stingray blood isolate: …
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IDENTIFICATION OF MICROBIAL FUNCTIONS INTERFERING WITH HOST-CELL PHYSIOLOGY: A QUICK VIEW INTO STREPTOCOCCUS THERMOPHILUS METABOLIC POTENTIAL
… alongside a marked improvement in glycolytic activity, without altering the optimized lactose uptake. This distinctive metabolic behavior of activated cells appears to modulate glycolysis and enhance acidification, positioning S. thermophilus as a promising tool not only for more efficiently …
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Some physico-chemical and biological aspects of urea
… not yet known. Sucrose does not influence the urease activity, and no urease activity was detected in the tobacco leaves used. The reduction of urea injury from foliar applied urea solutions containing sucrose was associated with decreased urea absorption and increased urea utilization. A …
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The Role of Gut Microbiota Urease in the Host With Liver Disease
… is nitrogen metabolism. In the colon, bacterial urease hydrolyzes host-derived urea into carbon dioxide and ammonia. Colonic ammonia can subsequently be absorbed by the host or utilized by the gut microbiota for additional nitrogen metabolism. In patients with liver disease such as cirrhosis and …
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Effects of phosphoroamides on transformations of urea nitrogen in soil
… that will retard hydrolysis of urea by soil urease and thereby reduce the problems encountered in use of this fertilizer. Numerous compounds have been patented or proposed as inhibitors of urea hydrolysis in soil, but only phenylphosphorodiamidate (PPD) has attracted significant attention. …
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Ammonia Volatilization, Urea Hydrolysis, and Urease Inhibition with the Application of Granular Urea in Agroecosystems
… from coated granular urea; 2) determine if urease can be extracted from corn and soybean residues; 3) determine if differences in urease activity are present in corn and soybean residues; and 4) evaluate N content and yield of corn treated with surface-applied coated urea fertilizers. The …
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Signals affecting the urease status of plant-associated bacteria, Methylobacterium spp
… the ability of resident PPFMs to mimic the urease-negative phenotype of two mutant classes of urease-negative soybean hosts. The working model is that there is a signal from the plant that either inhibits the production of the urease gene products in the associated bacteria or inhibits the …
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Investigation into the Presence of Helicobacter in the Equine Stomach by Urease Testing and Polymerase Chain Reaction and Further Investigation into the Application of the 13C-Urea Blood Test to the Horse
… the stomach, via the action of cytoplasmic urease. Different Helicobacter species have been isolated from many mammals but none has yet been cultured from the horse. Three tests used to identify human Helicobacter infection were applied to the horse. Test 1: PCR amplification of Helicobacter …
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Urea Hydrolysis in Soil Profile Toposequences: Mechanisms Relevant to Nitrogen Transport and Water Quality
… soil chemical conditions that affect microbial urease activity in surface and subsurface horizons of soil profiles that lie between agricultural fields and surface waters, particularly in sandy Coastal Plain regions. Laboratory studies were conducted to determine the most influential soil …
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Short term effects of hypoxia and anoxia on sediment biogeochemistry
… organic matter inputs decreasing with depth. Urease activity was enhanced following anoxic incubations of 7 days, with an inverse relationship with porewater ammonium concentrations and increased total organic carbon input. The biogeochemical resilience of the system is dependent on the …
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Manufacturing bio-tiles
… using the ureolysis MICP pathway. The ureolytic activity of Sporosarcina pasteurii was controlled by centrifuging and dilution with fresh yeast extract media. Bio-tiles can be made with MICP using various methods, each with drawbacks and advantages. Three methods were tested: submersion, pumping …
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Bacterial communities in glacier forefields of the Larsemann Hills, East Antarctica : structure, development & adaptation
… and pH fluctuations and by measuring enzyme activity at low temperature in environmental soil samples. The two studied glacier forefields are extreme habitats characterised by low temperatures, low water availability and small oligotrophic nutrient pools and represent sites of different …
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Ammonia emission from fertiliser application : quantification techniques and mitigation strategies
… the soil colloid and, more recently, the use of urease inhibitors have been encouraged the most. Urease inhibitors slow the hydrolysis of urea, thus limiting the pool of NH4+, potentially lost though NH3 volatilisation, within the soil solution. When evaluating any mitigation strategy an …