- 固定氮
- 化合氮
- fixed: adj. 1.固定的；確定的，不變的，固執(zhí)的。 2.【化 ...
- nitrogen: n. 【化學(xué)】氮，氮?dú)狻?nitrogen chlori ...
- fixed nitrogen fertilizer: 固定氮肥
- synthetic fixed nitrogen: 合成固定氮
- and nitrogen: 氫與氮的混合氣體
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fixed nitrogen中文什么意思
- 固定氮
- 化合氮
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例句與用法
- 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菌株對(duì)環(huán)境因子的適應(yīng)性研究：無(wú)氮培養(yǎng)條件下，測(cè)定溫度、碳源、酸堿度、滲透壓對(duì)w12生長(zhǎng)及固氮能力的影響，結(jié)果表明，在15 - 40下均能生長(zhǎng)并表達(dá)固氮酶活性，其最適生長(zhǎng)及固氮的溫度為25 - 35 ；能利用葡萄糖、蔗糖、蘋(píng)果酸、甘露醇等多種碳源生長(zhǎng)并固氮，當(dāng)培養(yǎng)基中同時(shí)存在蔗糖和蘋(píng)果酸時(shí)，細(xì)菌生長(zhǎng)和固氮活性最強(qiáng)；在偏酸和偏堿的條件下( ph4 . 5 - 8 . 5 )均能保持較強(qiáng)的生長(zhǎng)勢(shì)和較高的固氮酶活性，并能通過(guò)調(diào)節(jié)自身代謝平衡并適應(yīng)環(huán)境的酸、堿性變化，使培養(yǎng)液趨于中性：能耐受較高的滲透壓，培養(yǎng)液中卜、 5 naci濃度對(duì)其生長(zhǎng)和固氮酶活性影響不大，當(dāng)naci濃度升至2時(shí)，菌株的生長(zhǎng)勢(shì)及固氮酶活性才有所下降：低濃度的鉸對(duì)其固氮酶活性影響不大，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:全面綜述植物酰脲降解代謝酶的研究現(xiàn)況，概述植物尿囊素酶的分布、性質(zhì)、結(jié)構(gòu)，以及調(diào)節(jié)控制，并簡(jiǎn)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況，同時(shí)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
主要用作飼料的添加劑，具有吸附性和離子交換性，能吸氨固氮延緩營(yíng)養(yǎng)物質(zhì)通過(guò)消化道的時(shí)間吸附腸道有害物質(zhì)，改善消化機(jī)能同時(shí)可以供給畜禽多種微量和常量元素，促進(jìn)增產(chǎn)增重，提高飼料報(bào)酬。