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fixed nitrogen中文是什么意思

  • 固定氮
  • 化合氮

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  • 例句与用法
  • Effects of diverse environmental factors on the growth rate ( od4oo ) and nitrogenase activity ( ara ) of the strain w12 hi nitrogen - free culture were investigated in our experiments . the results implied that the strain w12 could easily adapt to different cultural conditions : it could use various carbon sources ( especially glucose , sucrose , malic acid , mannitol ) , propagate quickly and fix nitrogen at a temperature range of 15 ? to 40 ? and at 25 - 35 ? for optimum , at a ph range of 4 to 8 . 5 , at a saline concentration range of 0 . 01 % to 1 . 5 % ; low nlv " concentration had little effect on its nitrogenase activity . ara could also be detected when it grow in the culture media with 5mmol / l ntv "
    W12菌株对环境因子的适应性研究:无氮培养条件下,测定温度、碳源、酸碱度、渗透压对w12生长及固氮能力的影响,结果表明,在15 - 40下均能生长并表达固氮酶活性,其最适生长及固氮的温度为25 - 35 ;能利用葡萄糖、蔗糖、苹果酸、甘露醇等多种碳源生长并固氮,当培养基中同时存在蔗糖和苹果酸时,细菌生长和固氮活性最强;在偏酸和偏碱的条件下( ph4 . 5 - 8 . 5 )均能保持较强的生长势和较高的固氮酶活性,并能通过调节自身代谢平衡并适应环境的酸、碱性变化,使培养液趋于中性:能耐受较高的渗透压,培养液中卜、 5 naci浓度对其生长和固氮酶活性影响不大,当naci浓度升至2时,菌株的生长势及固氮酶活性才有所下降:低浓度的铰对其固氮酶活性影响不大,在0
  • Abstract : in ureide - transporting legumes , ureides ( allantoin and allantoic acid ) are major transportform of biological fixed nitrogen . the distribution , properties , structure and regulation of plant allantoinase were reviewed in detail . the advances in the recent studies on allantoate amidohydrolase and ureidoglycolate amidohydrolase were introduced . and the works desired to be done were pointed out
    文摘:全面综述植物酰脲降解代谢酶的研究现况,概述植物尿囊素酶的分布、性质、结构,以及调节控制,并简介植物尿囊酸酰胺水解酶和脲基乙醇酸酰胺水解酶的研究近况,同时指出待研究的方向。
  • With adsorption and ion exchangeability , it is mainly used as additive in feed , it can absorb ammonia , fix nitrogen , delay the time nutriments stay in alimentary canal , absorb detrimental substance , improve the function of digest , supply many microelements and macroelemnts for livestocks
    主要用作饲料的添加剂,具有吸附性和离子交换性,能吸氨固氮延缓营养物质通过消化道的时间吸附肠道有害物质,改善消化机能同时可以供给畜禽多种微量和常量元素,促进增产增重,提高饲料报酬。
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Last modified time:Sun, 10 Aug 2025 00:29:56 GMT

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