Urease activity in soils : a review
نویسندگان
چکیده
منابع مشابه
Inhibition of Urease Activity in Soils
Studies to evaluate more than 100 compounds as inhibitors of urease activity in soils showed that dihydric phenols and quinones were the most effective organic compounds tested and that silver and mercury salts were the most effective inorganic compounds. When the most potent inhibitors were compared using 50 1'8 of inhibitor per g of soil, their effectiveness decreased in the order: catechol >...
متن کاملUrease inhibitors: A review
Urease inhibitors possess a wide application in agriculture, clinical science and understanding of enzyme kinetics. These inhibitors play a significant role in reducing the loss of nitrogen from urea fertilizer in the form of volatile ammonia and, thus, improve the utility of urea based fertilizers. Their impact as an effective drug against urease producing bacterial infection is well documente...
متن کاملUrease Activity, Ammonia Volatilisation and Related Microbiological Aspects in Some South African Soils
Urease activity of various soils was indexed employing toluene sterile and non-sterile soils. The two methods indicated that part played by microorganisms. Apparatus used, soil depth, increment, depth of placement and pattern distributions are discussed in relation to volatile loss as are influences of soil moisture, reaction, temperature and drying-out. Urea on trash benefits fungi but invaria...
متن کاملGastrointestinal urease in man ' Part I Activity of mucosal urease
The relationship postulated between hepatic coma and hyperammonaemia implicates the gastrointestinal tract as a major source of the excess ammonia in the peripheral blood of some patients with cirrhosis (Butt and Summerskill, 1961; Chalmers, 1960; Sherlock, Summerskill, White, and Phear, 1954). Conventional therapy, comprising protein restriction, antibiotics, and enemas, is directed toward eli...
متن کاملUrease activity in microbiologically-induced calcite precipitation.
The role of microbial urease in calcite precipitation was studied utilizing a recombinant Escherichia coli HB101 containing a plasmid, pBU11, that encodes Bacillus pasteurii urease. The calcite precipitation by E. coli HB101 (pBU11) was significant although its precipitation level was not as high as that by B. pasteurii. Addition of low concentrations (5-100 microM) of nickel, the cofactor of u...
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ژورنال
عنوان ژورنال: Journal of the National Science Foundation of Sri Lanka
سال: 1996
ISSN: 2362-0161,1391-4588
DOI: 10.4038/jnsfsr.v24i3.5548