说明:双击或选中下面任意单词,将显示该词的音标、读音、翻译等;选中中文或多个词,将显示翻译。
您的位置:首页 -> 词典 -> 脲酶活性前言
1)  urea-amidohydrolase
脲酶活性前言
2)  urease activity
脲酶活性
1.
Effects of heavy metals on soil urease activity;
重金属对土壤脲酶活性的影响
2.
Comparative analyses between two methods of measuring soil urease activity;
土壤脲酶活性两种测定方法的比较
3.
Effect of urease inhibitor nBPT on soil urease activity and urease producing microorganisms;
脲酶抑制剂nBPT对土壤脲酶活性和脲酶产生菌的影响
3)  urease activity (UA)
脲酶活性(UA)
4)  Soil urease activity
土壤脲酶活性
1.
We carried out a series of studies on the soil urease activity of the salinized meadow with degenerative Aneurolepidium Chinense in Daan Niuxintaobao during July to October in 2006.
2006年7~10月对大安牛心套堡退化羊草盐碱化草甸的土壤脲酶活性作了初步研究,结果表明:大安牛心套堡退化羊草盐碱化草甸上,土壤脲酶活性随月份变化和土壤的垂直深度的变化表现出不同的强度,并呈现出一定的规律性。
2.
Soil urease activity of the 0 - 10 cm layer had a power-function correlation to rainfall (monthly mean value) and an exponential correlation to soil temperature, which showed that urease activity was deeply influenced by water and heat factors.
松嫩草甸羊草(Leymus chinensis)群落、碱茅(Puccinellia tenuiflora)群落和虎尾草(Chloris virgata)群落土壤脲酶活性的季节动态呈单峰曲线变化,在土体中随土层的加深,其活性逐渐递减。
3.
Soil urease activity was initially regarded as the function of two factors: buffer and time under the addition of external copper source.
添加外源铜条件下 ,土壤脲酶活性是土壤缓冲性及时间 2个因素的函数。
5)  urease activity
土壤脲酶活性
1.
Study on N_2O emission and urease activity in dryland soil;
旱地土壤N_2O排放与土壤脲酶活性关系的研究
2.
This paper mainly study on soil urease activity effected by dimehypo, the results showed that dimehypo has remarkable inhibitory on soil urease activity in different ecological zones, soil urease activity reduced with dimehypo concentration increasing, their relationship can be expressed by equation U=1/(β1×C+β0), The ecological dose ED50 is 4.
结果表明,杀虫双对不同生态区土壤脲酶活性具有明显的抑制作用,随杀虫双浓度的增加,酶活性持续减小、计算得到了土壤酶活性的生态剂量ED50值,获得了北方(?)土和南方红壤污染的;临界浓度为489和246g/kg;Langmuir模型可较好表征酶活性与尿素浓度间的定量关系;土壤脲酶活性和最大表观酶活性均可表征土壤受杀虫双污染程度的大小。
6)  acid urease
酸性脲酶
1.
Study on enzymatic characteristics of acid urease to hydrolyze urea in Chinese rice wine;
酸性脲酶分解黄酒中尿素特性的研究
2.
The extraction of an acid urease from enterobacteria was studied by the methods of ultrasonication and ethanol fractional precipitation.
采用超声破碎和乙醇分级沉淀的方法,对肠杆菌所产酸性脲酶的提取进行了研究,超声破碎最佳条件为:缓冲液pH6。
3.
Results show that acid urease catalysed reaction is of Michaelis reaction .
用Berthlot法测定酸性脲酶酶反应过程产物NH+4的浓度变化。
补充资料:脲酶
分子式:
CAS号:

性质:又称尿素酶。水解酶的一种,具有绝对专一性的催化分解尿素的酶。为镍蛋白酶。具有高度的专一性,只能催化水解尿素生成氨和二氧化碳,而对其他任何尿素的衍生物都不具催化水解作用。脲酶结晶首次从刀豆粉提取得到。微生物是脲酶的主要来源,大多数细菌、放线菌以及真菌均能产生。已报的细菌就有200多种。在临床方面,测定血液和尿液中尿素。农业生产上,检定尿素利用状况以及尿素利用率。微生物学方面,对细菌鉴定上作分类指标。在食品方面,用于测定豆浆脲酶活性,了解豆浆中皂素是否被破坏。

说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条