nitrogen-free 中文意思是什麼
nitrogen-free
解釋
無氮的-
1. ecological effects of long - term organophasphate pesticides contamination on soil microflora the long - term effects of organophosphate pesticides contamination on soil microflora were investigated in the present study. little difference in total counts of bacteria, actinomycetes and fungi was observed between the contaminated and the non - contaminated soil. compared with the control there were a slight decrease in total counts of free - living nitrogen - fixer and denitrifying bacteria and a significant increase in those of ammonifying and ammonia - oxidizing and nitrifying _ bacteria in the methylparathion contaminated soil
一、甲基對硫磷長期污染對土壤微生物的生態學效應研究了有機磷農藥甲基對硫磷長期污染對土壤微生物的影響，實驗表明：土壤細菌、放線菌、真菌總的數量影響不大；自生固氮菌和反硝化細菌數量減少；氨化細菌、亞硝化細菌、硝化細菌的數量在污染土壤中卻有所增加；與對照土壤相比，污染土壤呼吸作用下降了29 . 93 ；氨化作用和硝化作用強度得到增強。 -
Main xxxs : automatic refrigerant reclaiming and filling machine, automatic fuel injector cleaner & analyzer, tyre nitrogen inflator, automatic tyre pressure tester, fuel pressure tester, ozone sterilizer, disaffiliation - free cleaning liquid, etc
主要產品：全自動冷媒回收加註機、全自動噴油嘴檢測清洗分析儀、充氮機、自動充放測壓機、實用型燃油壓力測試儀、臭氧消毒機、免拆清洗液等。 -
Main products : automatic refrigerant reclaiming and filling machine, automatic fuel injector cleaner & analyzer, tyre nitrogen inflator, automatic tyre pressure tester, fuel pressure tester, ozone sterilizer, disaffiliation - free cleaning liquid, etc
主要產品：全自動冷媒回收加註機、全自動噴油嘴檢測清洗分析儀、充氮機、自動充放測壓機、實用型燃油壓力測試儀、臭氧消毒機、免拆清洗液等。 -
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 -
The morphological, physiological, biochemical and genetic diversities between bacillus thuringiensis wild - type strain ybt - 1463 and its plasmid - free mutant bmb171 was comparatively studied. it showed that the plasmid - free mutant strain bmb171 lost the ability to form the parasporal crystal, but there was on obvious diversities were observed on the sensitivity to 10 antibiotics, the utilization of 19 carbon sources and 12 nitrogen sources, as well as the growth properties between ybt - 1463 and bmb171, whereas the electro - transformation frequencies of bmb171 were much higher than those of ybt - 1463, respectively with 5 exogenous plasmids as the donor dnas
對出發菌株ybt - 1463和其無質粒突變株bmb171的部分形態、生理生化和遺傳學特性進行的比較研究的結果表明，突變株bmb171不形成伴胞晶體，但在個體形態與菌落特徵、對紅黴素等10種抗生素的敏感性、對葡萄糖等19種碳源和谷氨酸等12種氮源的利用能力及生長性能與出發菌株ybt - 1463無明顯差異。 -
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 。 -
In this study, 5 rhizosphere soil samples of wheat, maize, ryegrasses and willow tree were collected from campus of china agricultural university and beijing chaoyangqu, respectively. a total of 29 isolates were selectively obtained from these rhizosphere soli samples based on their growth on nitrogen - free medium and their resistance to 100 for 10 - 15 min
本文在中國農業大學科學園區採集了小麥和玉米的根際土，從北京市朝陽區窪里分別選擇不同環境採集2個黑麥草根際土壤樣品和1個柳樹根部的土壤樣品，分別從這5個土壤樣品中分離固氮的芽孢桿菌。 -
This machine is fit for the testing use of water pressure intension for highpressure vase as oxygen carbon dioxide, nitrogen, hydrogen, etc., with for functions of loading and unloading valve, water pressure intension testing. auto overturn water pulling, pressure tested under free condition, advanced at home, and is the favorite equipment for steel vase testing stationgs and manufacturers
本產品適用於高壓氣瓶（氧氣、二氧化碳、氮氣、氫氣等， ）作水壓強度試驗，具有裝卸瓶閥、水壓強度試驗，自動翻轉倒水，四大功能，在只有狀態下試壓，是目前國內較為先進的高壓氣瓶試壓裝置，是各鋼瓶檢測站、製造廠理想設備。 -
For analytical weighing. smooth surface is ideal for transferring weighed material. clean, dust - free sheets. paper is lightweight, yet strong enough to support analytical size samples. nitrogen - free
可用於分析裝配能夠稱量，極光滑的表面易於轉移稱量物品，稱量紙潔凈的無塵，質地很輕，但有足夠的強度可以拿起所稱量的物品。 -
A comparative study on nitrogen metabolism and nitrogen requirement for maintenance in roosters and layers fed antibiotic - free diets
公雞和母雞氮代謝及氮維持需要量的比較研究 -
Study on the absorption law of nitrogen, phosphorus and potassium of different generation virus - free potatoes
不同世代脫毒馬鈴薯氮磷鉀吸收規律的研究 -
We produce smt, self - act, soldering tin system, automated production - line, the machine of molding device and other supporting equipments. we have nitrogen lead - free technology, special designs strong and advanced program software. so consumers ratify our products very well
專業性生產smt周邊設備?無鉛波峰焊?無鉛迴流焊?自動化流水線等配套生產設備?產品以高超的氮氣無鉛技術?獨特的設計?強大先進的程序軟體深受業界肯定。 -
A comparative trial on integrated application of different nitrogen fertilizers into free - tilling and seedling - throwing paddy and its effect on yield of paddy
不同氮肥運籌方法對免耕拋秧稻產量影響的對比試驗 -
In nitrogen - free medium, the logarithmic phase of the strain w12 was about 13 - 48 h. in logarithmic period its doubling time was 2 - 4 h in nitrogen - free medium, 0. 9 - lh when enough nk
在無氮培養基上該菌在13h后進入對數生長期，並持續至48 52h ，這期間其生長代時為2 - 4h ，有氮培養基上為0 . 9 - 1h 。 -
Free amino nitrogen
游離氨基酸氮
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