例句與造句

1. 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菌株對環(huán)境因子的適應(yīng)性研究：無氮培養(yǎng)條件下，測定溫度、碳源、酸堿度、滲透壓對w12生長及固氮能力的影響，結(jié)果表明，在15 - 40下均能生長并表達固氮酶活性，其最適生長及固氮的溫度為25 - 35 ；能利用葡萄糖、蔗糖、蘋果酸、甘露醇等多種碳源生長并固氮，當(dāng)培養(yǎng)基中同時存在蔗糖和蘋果酸時，細菌生長和固氮活性最強；在偏酸和偏堿的條件下( ph4 . 5 - 8 . 5 )均能保持較強的生長勢和較高的固氮酶活性，并能通過調(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濃度對其生長和固氮酶活性影響不大，當(dāng)naci濃度升至2時，菌株的生長勢及固氮酶活性才有所下降：低濃度的鉸對其固氮酶活性影響不大，在0
2. 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，同時指出待研究的方向。
3. 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，能吸氨固氮延緩營養(yǎng)物質(zhì)通過消化道的時間吸附腸道有害物質(zhì)，改善消化機能同時可以供給畜禽多種微量和常量元素，促進增產(chǎn)增重，提高飼料報酬。
4. It's difficult to find fixed nitrogen in a sentence. 用fixed nitrogen造句挺難的