mutation point 中文意思是什麼

mutation point 解釋
突變點
  • mutation : n. 1. 變化,變異,更換；【生物學】突變；突變種；【語言學】母音變化；【音樂】（提琴的）變換把位；變聲；【法律】讓受。2. （人世的）浮沉,盛衰。
  • point : n 1 尖頭，尖端；尖頭器具；〈美國〉筆尖；接種針，雕刻針，編織針；小岬，小地角；【拳擊】下巴。2 【...
  1. Pcr method was used to identify candidate ms 188. sequence analysis indicated that a point mutation occurred in the second exon of the atmyb103 gene in male sterile mutant with caa ( gln ) replaced by a stop codon taa

    利用pcr的方法從突變體中擴增atmyb103基因並進行序列分析，結果表明突變體中atmyb103基因第二個外顯子上發生了點突變，由原來編碼谷氨酰胺的caa密碼子突變為終止密碼子taa 。
  2. With strong specificity and easy to manipulation, this simple, inexpensive, rapid molecular beacon hybridization technique permits visual monitoring of gene point mutation and snp, which shows better advantage than pcr - sscp. 2

    Mb雜交技術特異性強，簡單快捷，能進行可視性檢測，完全適用於點突變和snp的研究，技術特點明顯優于pcr sscp 。
  3. Mms, a kind of dna - damaging agent, predominantly methylates ring nitrogens of pyrine, leading to dna double - strand breaks, point mutation and so on

    甲磺酸甲酯（ methylmetbanesulfonate ， mms ）是一種能夠損傷dna的烷化劑，主要使dna嘌呤堿基上的o 、 n甲基化，造成dna雙鏈斷裂、點突變。
  4. At first, in order to prevent the premature convergence of genetic algorithm effectively, the author brings forward a novel dyadic floating - point supplementary mutation operator. then, simulating the natural evolution, the author presents a novel topology, unoriented - connected topology, for parallel genetic algorithm. in the end, an interval decomposed optimization method is brought forward for ipga, which can improve the optimization performance of the algorithm

    為提高演算法的性能，作者對遺傳演算法進行三種改進：首先，為克服遺傳演算法早熟收斂，作者提出一種新的二元浮點補碼變異運算元；其次，模擬生物自然進化模式，為并行遺傳演算法提出了一個新的并行拓撲結構- - - -無定向拓撲連接；最後，作者提出一種區間分解優化思想，來提高對最優解的搜索能力。
  5. Fourth, the theoretical model of optimum technological growth rate under discrete change is erected. technology is a unique production factor because technological growth experiences a mutation when technological increase accumulates to a certain extent. under this condition, the point - mutation model in tom ’ s mutation theory is applied to explain the phenomenon of technological

    將技術作為不同於勞動和資本的特殊生產要素進行考察，即當技術量的積累達到一定程度時，技術增長會產生突變，在此條件下，運用湯姆突變理論中的尖點突變模型，解釋了技術突變現象，討論了勞動和資本的不同組合變化下，在臨界點附近技術突然躍升或下降的突變性質；構建了技術突變完成後的技術增長率優化理論模型。
  6. The pocket accommodating the aromatic ring of phenylalanine is formed predominantly by hydrophobic side - chains, including those of ile10, ile13, prol50, leul75, leul79, phe209, ser211 and val221 ; whilst the amino group and carboxylate group of phenylalanine is coordinated by asp6, asp7, gln151 and ser180. the n - terminal region is found to be important to the function of arog. point mutation reveals that residue substitution of ilelo to ala10 leads to desensitization in the presence of 1 mm phenylalanine, simultaneously, exhibits a dramatic decrease in enzymatic activity

    綜合前人的研究和本研究工作的實驗數據，得出以下結論： 1 ）在arog的反饋抑制位點供苯丙氨酸結合的疏水口袋由asp6 、 asp7 、 ile10 、 ile13 、 pro150 、 gln151 、 leu175 、 leu179 、 ser180 、 phe209 、 ser211和val221等12個氨基酸殘基構成； 2 ）苯丙氨酸結合的疏水口袋分為兩個區域，與苯丙氨酸的苯環發生疏水作用的區域由ile10 、 ile13 、 pro150 、 leu175 、 leu179 、 phe209和val221的側鏈構成，而asp6 、 asp7 、 gln151和ser180的側鏈構成了與苯丙氨酸的氨基和羧基相互作用的區域。
  7. By artificially changing a to c at - 137 bp site upstream from transcription start point of cloned promoter, two site - mutation promoters, ipms ( 603 bp ) and ipm1 ( 900 bp ) were created

    通過pcr方法對克隆的兩個啟動子進行定點突變，使轉錄起始位點上游- 137bp處a突變為c ，得到兩個突變啟動子（ ipml 、 ipms ） 。
  8. 2. specific mutation from a to c at - 137 bp site upstream from transcription start point had no effect on the inducibility of the promoter in response to sa and bth. 3

    在轉錄起始點上游137bp定點將a突變為c后，對化學啟動子的化學誘導應答性沒有明顯的影響，但對誘導效應的向上運輸存在一定程度的阻抑作用。
  9. After absorption, the all - frans - retinal isomerizes to a 13 - c / s configuration and br undergoes a photocycle : br570 k590 l550 m410 n520 o640 br570 bacteriohodopsin is a promising biological photoelectric material. we intent to conduct a more thermostable br by site - directed mutagensis. a point ( no. 274 t, no. 274 a turn to c g ) mutation was introduced to br gene by successive pcr technique, and cloned into puc - 19 vector

    本論文利用連續pcr的方法定點突變了br基因的一個氨基酸，突變位點選擇了br基因第273的t和274位的a ，把它們變為cg （ tyr替換為arg ） ，然後把突變的br基因克隆入嗜鹽菌表達載體pnov - r ，經測序鑒定的表達載體轉化br缺陷的嗜鹽菌，構建了tyr79 argbr突變體。
  10. The comparative analysis of sequences indicated that the sequences of meq in different pathotypes are relatively conserved and the homology of the amino acid sequences is very high. the significant differences include two mutations in both mdv - 1 vaccine strains cvi988 / rispens and 814 strain : the deletion of a proline ( no. l93aa ), and this mutation is just exactly located in a 15 - amino - acid ( eelcaqlcstppppi ) repeat sequence within the c - terminal transactivation domain of meq protein ; and a point mutation with a shift from alanine ( a ) of all virulent strains to serine ( s ) was occurred on the no. 71 aa

    結果發現， mdv不同致病型的meq基因序列相對比較保守，它們相互間核苷酸和氨基酸序列的同源性均很高；但是，與所有七個致瘤性的mdv毒株相比，二個型弱毒疫苗cv1988 rispens株和814株均出現了兩個特徵性的突變：即第194位的p缺失性突變和第71位氨基酸由a變成了s的位點突變；缺失性突變恰恰位於meq基因中轉錄激活域內的一個多脯氨酸的重復序列（ pppp ）之中。
  11. The point mutation in vp2 residue 297 of canine parvovirus from ser to ala acid was examined, which causes a alteration of the restriction enzyme aiu i site

    根據vp2位點297的改變引起限制性內切酶aiu酶切位點的變化，建立pcr依賴性限制性片段長度多態性分析（ prfl ）方法，檢測vp2位點297的變異。
  12. We should specially point out that by the function of the mutation operator, which ensures a stable convergence of the algorithm into a global optimum

    需要特別指出的是，通過該變異運算元的作用，可以使演算法穩定地收斂到全局最優解。
  13. Based on the point of image - based rendering, and the technology of virtuality and reality combining, it yield the conception of virtual globe and its related thought, and takes the dispersed pixel element mutation as the nucleus, the principle of utilization geometry and graphics, 3d walk around is realized and true sense controls waits has carried on a series of research, has put forward the corresponding mathematical model, and has been in progress the improvement, and has got the better result to the tradition method

    本文從基於圖像生成的角度出發，由虛實結合的構思引出了視球及其相關概念，並以離散的像素變換為核心，利用幾何學和圖形學的原理，在三維漫遊的實現及真實感控制等方面進行了一系列的研究，提出了相應的數學模型，對傳統方法進行了改進，得到了較好的結果。
  14. To construct eukaryotic expression vector of mbl gene with codon 54 point mutation, the target sequence in pgem - mbld plasmid, which conains mbl cdna with codon 54 mutant allele, was amplified by pcr. after the cdna fragement and plasmids pci - neo were prepared by digestion with sma i and sal i, the fragment was inserted into sma i and sal i site in pci - neo eukaryotic expression vector, and the recombinant vector, named pci - mbl54, was obtained. the pci - mbl54, digested with restriction enzymes, was found to contain the point mutation mbl cdna by agarose gel electrophoresis analysis

    本實驗以ggc54gacmbl突變為研究對象，選用真核表達質粒pci - neo ，根據已構建好的含54位密碼子突變型mbl基因t載體的結構，設計合成新的引物， pcr擴增54位密碼突變型mbl基因，凝膠回收，雙酶切pcr產物和pci - neo質粒， t4連接酶連接，將前者克隆至後者的sma和sal位點，轉化大腸桿菌xl - 1blue ，氨芐選擇培養。
  15. Selection of mutation probability of floating - point number code genetic algorithm

    浮點數編碼遺傳演算法變異概率的選取
  16. ( 1 ) the paper has studied the contractive mapping genetic algorithm, which can be converged to a global optimal solution proved by fixed - point theorem of banach space. it remedies the shortage of standard genetic algorithm. furthermore, the paper discusses the genetic operation in the algorithm such as the coding, select, cross over and mutation etc. it will be help to the next work about fusion with the neural network

    本文融合神經網路技術和遺傳演算法，對軌道交通引起的地面振動進行了正分析和反演，並利用計算機技術實現了地面振動的三維動畫模擬，這主要包括： （ 1 ）研究了壓縮映射遺傳演算法，利用banach空間的不動點定理證明了壓縮映射遺傳演算法可以收斂到全局最優值，彌補了標準遺傳演算法不能收斂至全局最優值的不足。
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