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Showing 1 to 20 of 82 for “"urease"”.
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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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Transkriptionelle Analyse der Urease-Expression in Helicobacter pylori : Identifikation neuer bakterieller Faktoren, die für die Urease-Aktivität essentiell sind
Die Urease-Expression des säureresistenten Magenbakteriums H. pylori ist nicht, wie lange Zeit angenommen wurde, konstitutiv, sondern sie wird auf der Ebene der Transkription zum einen durch Säure, zum anderen über die Verfügbarkeit des Urease-Kofaktors Nickel reguliert. In der vorliegenden Arbeit …
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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 Role of Urease in the Pathogenesis of Edwardsiella ictaluri
… the insert showed that the gene was part of a urease gene complex that included ureE, ureF, ureG, ureD, ureI, and an ammonium transporter homologue. The ureG gene encodes a GTP-binding accessory protein which is thought to function in energy-dependent urease assembly. The ureG mutant strain was …
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The Genetics of Soybean Seed Urease (Isozymes, Clycine Max, Transcription)
… (i) to study the inheritance of the soybean seed urease isozymes, (ii) to determine the cause of the isozyme polymorphism and (iii) to study the inheritance of a soybean seed urease null.
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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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Regulation of Urease and Ammonia Assimilation in Selenomonas Ruminantium Strain D
Made available in DSpace on 2014-12-14T15:29:41Z (GMT). No. of bitstreams: 1 8009172.pdf: 5793688 bytes, checksum: db6df85d7c10ec6fbbd732d532ebf217 (MD5) Previous issue date: 1979
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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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Reduction of ammonia emissions by applying a urease inhibitor in fattening pig houses
… to reduce ammonia emissions is the use of a urease inhibitor, which inhibits the enzyme urease and thus prevents the hydrolysis of urea, which in turn leads to a reduction in ammonia emissions. The inhibitor's potential to reduce ammonia emissions has already been demonstrated in cattle …
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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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A comparison among lipoxygenase, trypsin inhibitor, and urease enzyme inactivation during blanching of dehulled and whole soybeans
… lipoxygenase (LO), trypsin inhibitors (TI), and urease (U) enzyme was used to determine the limiting factor for processing. In addition, comparison of inactivation kinetics and protein insolubilization was investigated with regards to type of bean sample; variety of bean; and method of solution …
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Design, Fabrication and Performance Evaluation of an Impedimetric Urea Biosensor System
… conferred with the specificity of the enzyme urease. Urease hydrolysis of urea produces NH4+, HC03- and OH- ions that decrease the device's impedance. The temporal rate of change (kinetic) and the extent of change (equilibrium) of ion concentration were measured as the sensor's response. Five …
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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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Separation and Structure Characterization of Biologically Important Substances
An attempt was made to isolate urease inhibitors from commercial Yucca schidigera extract. Trans-3,3$\sp\prime$,5,5$\sp\prime$- tetrahydroxy-4-methoxystilbene was isolated and its structure was assigned. Biological tests indicated that it was a urease inhibitor, and that it was also active against …
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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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Untersuchungen zur Bedeutung der Carboanhydrasen CahA und IcfA für die Adaptation von Helicobacter pylori an das Extremhabitat Magen
… Zusammenhang mit Substraten und Produkten der Urease-Reaktion bedeutsam erschien. Die Ergebnisse weisen deutlich auf einen Einfluß der Enzyme auf den wichtigsten Pathogenitätsfaktor, die Urease hin, deren Aktivität durch die Mutation signifikant erniedrigt wurde. Insbesondere scheint eine …
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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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Considerations on the use of Impedance Spectroscopy for the Detection of Virions Trapped in Quadrupolar Microelectrode Arrays
… the viral particles would be functionalized with urease. This uease would then be used to degrade non-ionic urea into ionic products thereby increasing the medium conductivity. A model was formulated to predict the conductivity increase expected for low concentrations, and validated using higher …
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