突變固定 的英文怎麼說

中文拼音 [tūbiàngùdìng]
突變固定 英文
mutation fixation
  • 突 : Ⅰ動詞1 （猛沖） dash forward; shoot out 2 （高於周圍） protrude; bulgeⅡ副詞（突然） abruptly; sud...
  • 固 : Ⅰ形容詞（結實; 牢固; 堅硬） firm; hard; solid Ⅱ副詞1 （堅決地; 堅定地） firmly; resolutely 2 [書...
  • 定 : Ⅰ形容詞1 （平靜; 穩定） calm; stable 2 （已經確定的; 不改變的） fixed; settled; established Ⅱ動詞...
  • 突變 : 1 （突然急劇的變化） sudden change; change suddenly; transilience; accident; saltation; revulsion...
  1. Whole cell c2d2 reduction by all four mutants comparing to wild type and ni / v mutant was also detected. the result showed that only single a - gln194 substitution did not perturb the stereospecificity of protonation of c2d2. the above comparing results indicate that in mofe protein ( 1 ) a a - gln190 site and its association with homocitrate are important for the transfer of electron / proton to femoco, while a - his194 site and the homocitrate are independent in h2 evolution

    對四個突變株細胞的c _ 2d _ 2還原特性及還原產物中反式-順式- 1 ， 2 -二氘代乙炔的比例進行了測定並與野生型及nifv突變株相比較，結果表明只有- gln ~ （ 194 ）替換不影響c _ 2d _ 2還原產物中反式-順式- 1 ， 2 -二氘代乙炔的比例，即未改變固氮酶還原c _ 2h _ 2加氫的立體構型的專一性。
  2. Sentence stress isn ' t " fixed " like word stress. in fact, you can stress words that are normally unstressed in order to highlight different meanings

    句中重讀並不像單詞重音那樣固定不變。事實上，你可以通過在平時不重讀的詞上重讀來突出不同意義。
  3. The principles, operation and applications of site - directed mutagenesis, gene fusion technology, and post - translational modification methods were introduced emphatically

    著重闡述了基因定點突變技術、基因融合技術和翻譯修飾技術等新興定點固定化技術的原理、特點和操作。
  4. The nucleotide ( nt ) sequence of the insert in phz1754 is 2299bps in size. computer assisted analysis of the sequence revealed an open reading frame ( orf ) with a g + c content of 70. 3 % that would encode a protein of 552 amino acids ( aa ). the nt seque nce comparision revealed that the orf in the sequenced region exhibits 85 % dna sequence homology with the cholesterol oxidase gene choa of streptomyces sp

    對phz1754進行外切核酸酶（ exonuclease ， exo ）順序缺失，獲得單向長度漸減重疊的系列突變體，核苷酸序列測定顯示出該ecor - sal片段的精確大小為2299bps ， frameplot程序分析揭示出該區域一個完整的開放閱讀框（ orf ）的存在，其大小為1656bps ， g + c含量為70 . 3 ，編碼552個氨基酸，利用blastsearch程序將orf的核苷酸序列及推導的氨基酸序列與因特網上基因及蛋白質數據庫進行綜合比較，發現無論在核苷酸水平還是在蛋白水平上，該orf均與膽固醇氧化酶表現出同源性，而且與鏈黴菌膽固醇氧化酶同源性最高，說明該orf編碼膽固醇氧化酶基因。
  5. By successful solution of non - linear magnetic fields and revision of the program, we can reach following conclusions : in the computation of nonlinear magnetic fields, if iteration method is used, under - relaxation is necessary when amending the permeability distribution in soft magnetic materials ; and when < wp = 5 > calculating the equivalent current density in permanent magnets, under - relaxation is not a necessity ; when searching for permeability values by interpolation method on the demagnetization curve of soft magnetic materials, if a fixed saturation point is set, around this point an abrupt change of permeability values will be obtained ; this sudden change may cause a little problem in the smoothness of magnetic field distribution ; because the magnetic circuits of microwave tubes are too complicated, in the author ' s view, to describe the working state of a magnet system, the working points of magnets can not do it properly but average energy production of magnets will serve ; as to indicate the quality of a magnet system design for microwave tubes, the efficiency of magnetic energy utilization will be a very good criterion

    由此得出結論，在非線性磁場計算中：採用迭代法的情況下，在各迭代循環之間進行磁導率修正時，一個欠鬆弛迭代過程是必需的；對永磁體中的等效電流修正時可以不作欠鬆弛迭代；在純鐵的磁化曲線上指定某一個固定的磁感應強度為磁飽和值，會使得插值求出的磁導率在該磁飽和值附近有一突變，這一突變對計算結果中磁場分佈變化的光滑性稍有影響。在微波管磁系統設計中，由於微波管磁路比較復雜，作者認為磁體的工作點並不能很好地反映磁體的工作狀態，而採用平均磁能積為衡量磁體工作狀態的標準更加符合微波管磁系統的實際情況；要表示磁系統設計好壞的程度，則用磁能利用的效率為標準更好。
  6. At the initial stage of planar technique, b was employed as ideal diffusion impurity in base - region of npn si planar devices because of the match of its solid - solubility and diffusion coefficient in si with those of p in emission - region, and the good shield effect of sio2 film to b. but because of the relatively large solubility ( 5 1020 / cm3 at 1000 ) and the small diffusion coefficient, the linear slowly - changed distribution of acceptor b in pn junction can not be formed, which could not cater to the requirement of high - reversal - voltage devics. thereafter b - a1 paste - layer diffusion technology and close - tube ga - diffusion technology had been developed, while the former can lead to relatively large the base - region deviation and abruptly varied region in si, which caused severe decentralization of current amplification parameter, bad thermal stability and high tr ; the latter needed the relatively difficult pack technique, with poor repeatability, high rejection ratio, and poor diffusion quality and productio n efficiency

    在平面工藝初期，由於b在硅中的固溶度、擴散系數與n型發射區的磷相匹配， sio _ 2對其又有良好的掩蔽作用，早被選為npn硅平面器件的理想基區擴散源，但b在硅中的固溶度大（ 1000時達到5 10 ~ （ 20 ） ，擴散系數小， b在硅中的雜質分佈不易形成pn結中雜質的線性緩變分佈，導致器件不能滿足高反壓的要求，隨之又出現了硼鋁塗層擴散工藝和閉管擴鎵工藝，前者會引起較大的基區偏差，雜質在硅內存在突變區域，導致放大系數分散嚴重，下降時間t _ f值較高，熱穩定性差；後者需要難度較大的真空封管技術，工藝重復性差，報廢率高，在擴散質量、生產效率諸方面均不能令人滿意。
  7. You may get them on the inside of your lips and your cheeks, around gums and on the tip of your tongue. they may sometimes have a yellowish white coating. around them it is swollen and red. in the more severe situation, you will have a headache, feel dizzy and get bad - tempered easily it is better for people to take longdan xiegan decotion. cankers sore of blood - stasis

    潰瘍面色澤呈淡灰白色，有發展快愈合慢之特點，女性往往在月經前及月經期間口腔粘膜中突然發生數枚潰瘍，局部劇烈疼痛，頭痛位置固定不變，月經色呈紫黯，有淤斑，如長期不治，易導致病情加重。
  8. Secondly, in the first phase, this paper solves the inventory supplement sub - problem through integer programming model, using the reduction of vehicle routes as the breakthrough to this problem, divides a whole distribution region into many customer subsets by radius - circle partitioning method, determines the optimal number of vehicle of service distribution region, applies two practice - oriented conclusions to reduce the number of routes on the basis of customer grouping, thus decreases considerably the variable scale of integer programming, and solves the problem through professional software to fix inventory supplement plan in plan period

    其次，在第一階段使用整數規劃數學模型來規劃庫存補充計劃子問題，以減少車輛巡迴路線數目為求解該整數規劃的突破口，提出與固定劃分策略（ fpp ）相似的客戶分組思想，通過徑?環切割法把整個配送區域劃分成多個客戶子集，實現客戶分組並確定服務整個配送區域的最佳車輛數目。在客戶分組的基礎上建立了精簡路線的整數模型，然後通過運用兩條基於實際經驗的判斷來進一步減少巡迴路線數目，進而極大地減少了整數規劃的變量規模，並利用專業的求解軟體來求解該整數規劃問題，從而確定計劃期的庫存補充計劃。
  9. After obvious cytopathogenic effects developed, virus - contained supematants were harvested, and the progeny viruses were screened for lacz - expressing viruses by a plaque assay using x - gal. single blue plaques were picked, and a recombinant prv stably expressing lacz gene ( designated as rprv - lacz ) was obtained after ten cycles of plague purification and pcr identification. the results showed that the lacz gene expression cassette was stably expressed in the recombinant rprv - lacz derived from bartha - k61 strain

    該載體與具有高度感染性的bartha - k61株基因組dna通過脂質體加plus法共轉染vero細胞，採用甲基纖維素固定病變， x - gal染色，經過10代藍斑純化獲得了一株穩定表達lacz基因的ge tk基因缺失突變株，命名為rprv - lacz 。
  10. Our scheme decreases l - 2db required eb / i0 relative to variable - power fixed rate transmission. we also show that this combined scheme avoid large errors occur. this allows the interleaving depth to be reduced

    相對固定速率可變功率的傳輸方式，我們給出的方案使系統所需信干比eb io降低1 - 2db ，同時避免大塊突發錯誤的產生，降低了交織深度。
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