氮保持 的英文怎麼說

中文拼音 [dànbǎochí]
氮保持 英文
nitrogen retention
  • 氮 : 名詞[化學] nitrogen （7號元素, 符號n）
  • 保 : Ⅰ動詞1 （保衛; 保護） defend; protect 2 （保持） keep; preserve; maintain in good condition 3 （...
  • 持 : 動詞1 （拿著; 握著） hold; grasp 2 （持有; 保持） keep; hold 3 （支持; 保持） support; maintain 4...
  1. Gas - filled shock absorber injected with pure n2, which not only keeps stability of damping force, but also reduce aerification and foaming, meanwhile, extend the effective life

    氣壓式內充入純氮氣，不僅可保持阻尼的穩定性，還可減少油液汽化及泡沫化，延長產品有效壽命。
  2. The nitride on oxide layers remains intact.

    氧化物表層上面的氮化物保持原狀不動。
  3. This approach seeks to use various sources of plant nutrients, mineral fertilizers, organic manures, crop residues and biological nitrogen fixation for each farm ' s cropping system and offers the farmers the best opportunity for sustainability while protecting the environment and conserving the resources

    這一方法，為每個農場的種植制度尋求利用各種植物養分資源，諸如礦質肥料、有機肥料、作物殘體和生物固氮，並且在保護環境和資源的同時，給農民提供更好的持續發展生產的機會。
  4. Area was the best inorganic nitrogen source which should maintain at high concentration at earlier part of fermentation because of saccharomycete ' s feature

    尿素是最佳的無機氮源，由於酵母細胞對氮源吸收利用特點，在發酵初期氮源需要保持較高水平。
  5. 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菌株對環境因子的適應性研究：無氮培養條件下，測定溫度、碳源、酸堿度、滲透壓對w12生長及固氮能力的影響，結果表明，在15 - 40下均能生長並表達固氮酶活性，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並固氮，當培養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，並能通過調節自身代謝平衡並適應環境的酸、堿性變化，使培養液趨于中性：能耐受較高的滲透壓，培養液中卜、 5 naci濃度對其生長和固氮酶活性影響不大，當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
  6. The hyperthermophilic archaeon pyrococcus furiosus was cultivated in an oxygen - free schott bottle integrated with a thermometer, tubes gassing with nitrogen at 98

    Pyrococcusfuriosus的小量培養採用排盡氧氣后的schott試劑瓶，同時不斷通入氮氣，溫度保持在98 。
  7. However, to exploit and utilize biological nitrogen - fixation is one of the important ways to solve those problems

    因此，充分發掘和利用禾本科植物的生物固氮潛能，將是確保農業可持續發展的重要途徑。
  8. In this thesis, a strain of associative nitrogen fixing bacteria with high nitrogenase activity was selected and the further studies for it were conducted, the results obtained are as follows : selection and identification of associative nitrogen fixing bacteria with high nitrogenase activity. the nitrogenase activities detected by means of the acetylene reduction method and growth rates tested by optical density of germ suspension under the x 400nm ( od4oo ) of all the strains tested except for the strain w12 reduced gradually due to frequent subculture during a year. however, the strain w12 has been showing high and stable nitrogenase activity and growth rate since it was isolated five years ago

    固氮菌株的篩選與鑒定：測定從不同來源分離、收集和保藏的12個固氮菌株或分離物在不同保存時期的固氮酶活性和生長能力，發現多數菌株在初分離得到時固氮酶活性較高，但隨著轉接次數的增多卻逐漸喪失固氮酶活性，生長也隨之減弱，只有w12在五年前從埃及分離得到至今一直保持旺盛生長勢和較高的固氮酶活性， 48h內乙烯生成量可達1800nmol乙烯ml菌液以上，遠遠高於其它菌株，其生長量（ od _ （ 400 ）值）也遠遠高於其它菌株。
  9. The height of media 、 the ratio of gas to liquid 、 hydraulic loading 、 the organic and ammonia loading of influent are the key factors influence the performance of one - stage aerobic baf. the conclusions of the experiment are as following : the best height to remove the organic matter and ammonia is at 60cm 、 120cm from the influent side respectively. the best ratio of gas to liquid is 3 : 1 4 : 1 ; the organic and ammonia loading of influent have litlle influence on the performance of one - stage aerobic baf when the concentration are low ; whe the ratio of gas to liquid is 3 : 1, the ammonia loading is blow 0. 87kgnh _ 4 ~ + - n / m ~ 3. d, the enfluent concentration of ammonia is blow 5mg / l which satisfies the water reuse standard ; at different organic loadings, the removal of organic matter keeps 35 % 45 %. hypothermia is unfavourable to nitrification for one - stage aerobic baf to removel ammonia, the influent concentration of ammonia can ’ t satisfy the water reuse standard

    試驗表明:對有機物的去除主要發生在進水端60cm內，對氨氮的去除主要發生在進水端120cm內;曝氣生物濾池運行的最佳氣水比為3 : 1 4 : 1 ;在進水有機物和氨氮濃度比較小時，水力負荷對其去除率影響不大;在氣水比為3 : 1 ，進水氨氮負荷小於0 . 87kgnh4 + - n / m3 （濾料） ? d時，出水氨氮小於5mg / l ，滿足回用水的要求;在不同有機負荷下，有機物去除率保持在35 % 45 % 。
  10. N sources ( including organic and inorganic n tested ) and c sources tested could restrain methane oxidation. cellulose inhibited methane oxidation most weakly while the high concentration of methanol and glucose did dramatically, but the proper concentration of methanol could stimulate soil methane oxidation sharply. in the middle process of methane oxidation, addition of glucose could restrain methane oxidation shortly but the inhibition could be relieved about 5 days later when supplied again with enough oxygen

    土壤微生物是甲烷氧化的主要生物類群，含水量對土壤甲烷氧化活性有明顯影響，過高或過低對甲烷氧化均具有抑制作用；氮源（包括有機和無機氮源）對甲烷氧化均有抑制作用；不同碳源對甲烷氧化的影響各異，纖維素對甲烷氧化抑制作用最小，而高濃度的甲醇、葡萄糖則對甲烷氧化具有強烈抑制作用；而適當濃度的甲醇可極大促進土壤對甲烷的氧化：在甲烷氧化過程中加入葡萄糖能迅速抑制甲烷氧化；在加入葡萄糖的同時保持瓶中充足的氧氣，則這種抑制作用可以在重新培養一定時間后得到解除。
  11. Little is known about how to control anpsp due to lack of the related theory and practical experience. especially there is no satisfactory measure to reduce the runoff and leaching of n and p from agriculture into rivers and lakes. it ' s very significant in both theory and realism to reduce agricultural non - point source pollution and protect our ecological environment for realizing the harmonious development of resource, environment and agriculture in china

    農業面源污染是困擾我國社會、經濟持續發展的一個嚴重的環境問題，主要是由於農業面源污染具有量大面廣、分散的特點，並受自然條件突發性、偶然性和隨機性的制約，現階段我們對農業面源污染情況的了解程度遠遠不如點源污染，還缺乏整治的相關理論基礎和實踐經驗，減少污染物尤其是氮、磷營養的排放具有相當大的難度，因此控制農業面源污染、保護和優化生態環境對實現我國資源、環境和農業協調發展有重要的理論和現實意義。
  12. Why is this so important ? earth is of just the right mass to retain the heavier gases like carbon dioxide, nitrogen and oxygen in its atmosphere

    在這生命帶中，像地球般質量大小的行星才得以保存大氣層和液態水，以地球來說，它的質量使它剛好維持大氣中較重的氣體如二氧化碳氮和氧。
  13. It was indicated n split supply has an accumulated ecological effect on the rice rhizosphere microbes activities, so does water factor on the soil microbes of rice rhizosphere

    這說明在分次施氮的施肥模式下，施氮對水稻根際土壤微生物的生態效應保持一定的持續作用，而水分條件對土壤微生物的生態效應也需要一定的時間才能起作用。
  14. In order to build a suitable soil circumstance with fertility maintaining or even inproving, principles of rational fertilization, combining organic manure with npk fertilizers and consideration of land utilization, maintenance and protection should be taken

    為了保持甚至改善土壤肥力以建立良好的土壤環境，要採用合理施肥、有機肥與氮磷鉀化肥配合、綜合考慮土地利用、維持和保護的原則。
  15. Chart s experience in the removal of oxygen from the packaging process of many foods allows for extended shelf life with no loss of flavor

    查特在食品包裝方面的氮氣置換技術可以延長食品貨架時間，並保持食品原味。
  16. Abstract : results of a ten year ' s field experiment indicated that the use of nutrients recycled in the farming systems with appropriate amount of fertilizer applied according to the soil nutrient supplying ability could not only produce high crop yield but also balance the soil nutrient budget so that there were no significant surplus of nutrients ( mainly inorganic nitrogen ) which may emit or leach out of soil into environment

    文摘:持續10a的田間試驗結果表明，在保持農業系統養分循環再利用的基礎上，根據土壤養分供給力設計化肥施用量，可以在實現作物高產的同時，平衡土壤養分收支，從而避免土壤中肥料養分（主要是氮）過剩而進入環境。
  17. Crop rotation plus fertilizer application produces the highest crop yields and maintains the highest soil n and organic matter levels

    作物輪作加施肥產生最高作物產量，並保持最高土壤氮和有機質水平。
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