篩徑 的英文怎麼說

中文拼音 [shāijìng]
篩徑 英文
screen aperture
  • : 名詞[書面語] (植物名) sedge
  • : Ⅰ名詞1 (狹窄的道路; 小路) footpath; path; track 2 (達到目的的方法) way; means 3 (直徑的簡稱...
  1. A genetic transformation model for the brown seaweed undaria pinnatifida has been primarily set up by using micro - particle bombardment as the method, female or male gametophytes as the gene recipients, hybridization as the regeneration route and chloramphenicol, hygromycin or basta as selective reagents

    本文從轉化受體、轉化方法、報告基因、再生途選方法等方面對裙帶菜的遺傳轉化進行了研究。首先,分離並建立了裙帶菜雌雄配子體的無性繁殖系,進行了裙帶菜的不同再生途的研究。
  2. Niger with phytase activity about 2250 u / ml which selected by protoplast - uv mutation was used as original, prepared it into fungu - suspend - liquid, through uv mutation, daub on the filter - substract. pre - primary - selection was according to the lucency - circle, primary - selection was one fungus inoculate one flask to ferment, secondary - selection was using several high phytase activity fungus through one fungus inoculate 2 - 3 flasks to ferment. then one or two high phytase activity fungus of the secondary selection were used in the next mutation cycle

    首先用粗略制備的原生質體經紫外誘變選到一株酶活為2250u ml的實驗出發菌;制備成菌懸液,紫外燈下照射誘變,紅光下塗抹選平板,恆溫培養2 3d ;按透明圈大小進行預初,挑選圈比大的菌落接斜面,恆溫培養3d ;按一株一瓶的方式進行初;從中選取酶活較大的3 5株,按一株2 3瓶的方式進行復;挑取酶活大且穩定的1 2株進入下一代誘變選。
  3. Hammer - flake grinder uses the energy that the high - speed rotary, hammer - flake schleps to hit the raw materials, and makes them luther grinde when gear plate and sieve plate hit together

    錘片粉碎機利用高速旋轉的錘片所攜帶的能兩撞擊物料,使物料破碎並能高速與齒板碰撞后進一步破碎,此過程反復進行,直到物料小於板孔后穿過板排出機外。
  4. Sieve diameter is the length of the side of a square sieve opening through which the given particle will just pass.

    析粒」是指一個四方孔的邊長,某已知的顆粒將恰好通過這孔。
  5. Sieves and sieving. wire gauze with square apertures made from annealed round wire for industrial use. wire diameters

    分.工業用退火圓鋼絲制方孔金屬絲網.鋼絲直
  6. Abstract : this thesis discusses the process and operational management of the 600 mw condenser cooling water systems at high concentration ratio in respect of chemicals selection and dosage

    文摘:主要從循環水處理藥劑的選及其加藥量,來討論目前600mw機組高濃縮倍率下循環水處理的途及運行管理。
  7. The test was made on the compound tray, dual flow tray, sieve tray and valve tray for mass transfer efficiency with in - diameter 300 mm column using ethanoi and water system

    在直300mm的精餾塔內,以乙醇-水為介質,進行了復合塔板、穿流板、板和浮閥塔板的傳質效率的研究。
  8. The photosynthetic characters of super - high - yield rice ( oryza sativa ), its photoinhibition and genetic law of photosynthetic traits and screening of high photosynthetic efficiency materials etc. were reviewed in this paper

    摘要綜述了超高產水稻的光合特性、光抑制、光合性狀的遺傳規律和高光效材料的選等內容,比較詳細地介紹了光抑制部位及其表現,光抑制的原因以及光抑制中熱耗散的可能途及作用等。
  9. On the basis of the study of the theory and appraise method on land use in the small towns from home and abroad, this paper at first conducts a deep study on the development and role of the small towns, indicating that its development has sawn an uneven development phrase and becomes a carrier of the enterprises, a pool of surplus laborers, a hub of material exchanges between the rural and urban areas, a base of spiritual civilization, an important way to achieve urbanization. second, it conducts a study on the situation and features and the problems the land use, indicating that the efficiency of the land use is low, which has a direct influence on the development of agriculture and the role of the small towns. and the study of the demand of the land indicates the shortage of land is serious, and the small town must rationally use the land and increases its intensive role and the economical efficiency to meet the demand

    在分析國內外已有關于小城鎮土地利用的理論與評價方法的基礎上,首先對小城鎮在我國的發展、地位和作用進行了深入的分析,判明我國小城鎮發展經歷了一個曲折向上的發展階段,已成為鄉鎮企業的載體,農村剩餘勞動力的蓄水池,城鄉物資交流的樞紐,農村精神文明的基地,是我國城市化的重要途;其次,對小城鎮土地資源利用現狀和特徵進行了探討,並對發展小城鎮建設導致的土地利用問題進行了剖析,表明目前我國大多數小城鎮土地效益和規模效益低下,佔用耕地過多,直接影響農業的發展,影響小城鎮的地位和作用;通過小城鎮土地供需分析研究表明,我國土地短缺十分嚴峻,小城鎮土地需求缺口較大,小城鎮必須合理利用現有土地,增強集約功能和土地經濟效益,從而緩解需求壓力;最後,論文通過運用特爾菲法,描述統計分析法、多元統計分析(主成分分析)法和系統分析法中的層次分析法( ahp )等一系列方法,結合定性和定量兩方面,從土地質量、土地資源數量與結構、土地經濟效益、環境效益、社會效益等五個方面進行分析,選、建立了土地資源利用評價指標體系,在因子評價的基礎上,建立了土地利用綜合評價模型,並給出了評價過程和方法。
  10. Based on analyzing the theoretical model of ultrasonic attenuation, the formula was integrated into the ultrasonic attenuation model, and the relation of ultrasonic attenuation to pulp density and particle size was derived

    在分析超聲衰減基本理論模型的基礎上,將不同粒下累積含量集成到超聲波衰減模型中,推導出超聲波衰減與礦漿濃度、粒度之間的關系模型。
  11. Recently years, scholars had found that the traditional chinese medicine had the function to regulate the immune function and anti - virus by rigorous study

    近年來,國內外學者通過大量的選和嚴格的科學論證,發現中藥在調節機體免疫功能、抗病毒方面有著較大的潛力,被認為是尋找新的抗艾滋病藥物的一條切實可行的途
  12. The formula of cumulative weight percentage at different particle sizes, which was in the case of composite particle size distribution, was proposed

    摘要提出了在礦砂粒尺寸級配情況下,不同粒下累積含量公式。
  13. Alumina is then extracted from the furnace and passed over vibrating sieves to obtain an extremely fine powder with a diameter of less than one micron

    將鋁氧粉從煅燒爐中提取出來。通過振動出直不足1微米的超細粉末。
  14. Guide to the choice of aperture size and wire diameter combinations for industrial wire screens and woven wire cloth - general

    工業用金屬絲網和金屬絲編織布的孔尺寸和線的組合選擇指南.第1部分:總則
  15. Guide to the choice of aperture size and wire diameter combinations for industrial wire screens and woven wire cloth - preferred combinations for woven wire cloth

    工業用金屬絲網和金屬絲編織布的孔尺寸和線的組合選擇指南.第2部分:金屬絲編織布的優選組合
  16. When both genes were co - expressed in e. coli, the activity of ppsa varied from 2. 1 - 9. 1 fold comparing to control, but the activity of tkta was relatively stable ( 3. 9 - 4. 5 fold ). whatever the two genes were expressed respectively or cooperatively, both could promote the production of dahp, the first intermediate of the common aromatic pathway, but co - expression was more effective on forming dahp and screened ppt - and ptp - as more effective. the results demonstrate that co - expression of ppsa and tkta can improve the production of dahp, and what ' s more, when multigenes co - expressed, the recombinant which has coordinated enzymes activity is optimum

    莽草酸途的最優化和整體調控基因csra的敲除正是上述改變的分子基礎,同時也為三種芳香族氨基酸的基因工程菌的構建打下了基礎; 7 .在國內外首次實現了共同途限制性底物關鍵酶ppsa刁無『及arog與分支途關鍵酶基因phea的串聯高效表達,所構建的重組質粒ptga ,其ppsa 、 tkta 、 arog 、 cm和pd的酶活分別比對照提高了3 、 2 、 2 , 5 、 4 、 2 . 3倍,且其酶活比較協調一致; 8 .將ptga導入到選的基因敲除和基因替換菌株大腸桿菌31884 c甲b中,搖瓶發酵證實比以往所構建的基因工程菌株具有較高的phe產量和糖轉化率率,分別為0 . 448 %和22 . 4 % 。
  17. Abstract : plant responses to salt stress via a complex mechanism, including sensing and transducing the stress signal, activating the transcription factors and the corresponding metabolizing genes. since the whole mechanism is still unclear, this review emphasize the biochemical events during the plant adaptation to salt stress referring to an index of importance : the homeostasis in cytoplasm, the biosynthesis of osmolytes and the transport of water. most of these biochemical events were elucidated by study of halophyte and salt - sensitive mutations, also many important genes involved were cloned and used to generate stress - tolerance phenotypes in transgenic plants. on the other hand, about the molecular mechanism in signal transduction, the research of arabidopsis mutations and yeast functional complementation provided helpful traces but not full pathway

    摘要植物對鹽脅迫的耐受反應是個復雜的過程,在分子水平上它包括對外界鹽信號的感應和傳遞,特異轉錄因子的激活和下游控制生理生化應答的效應基因的表達.在生化應答中,本文著重討論負責維持和重建離子平衡的膜轉運蛋白、滲調劑的生物合成和功能及水分控制.這些生理生化應答最終使得液泡中離子濃度升高和滲調劑在胞質中積累.近年來,通過對各種鹽生植物或鹽敏感突變株的研究,闡明了許多鹽應答的離子轉運途、水通道和物種特異的滲調劑代謝途,克隆了其相關基因並能在轉基因淡水植物中產生耐鹽表型;另一方面,在擬南芥突變體及利用酵母鹽敏感突變株功能互補選得到一些編碼信號傳遞蛋白的基因,這些都有助於闡明植物鹽脅迫應答的分子機制。
  18. Geotextiles and geotextile - related products - determination of the characteristic opening size - wet sieving method

    土工布及其有關產品有效孔的測定濕
  19. Diameter of screen

    體直mm
  20. Diameter of cylindrical screen length mm

    筒直長度
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