無毒株 的英文怎麼說

中文拼音 [wúdúzhū]
無毒株 英文
avirulent strain
  • 無 : 無Ⅰ動詞（沒有） not have; there is not; be without Ⅱ名詞1 （沒有） nothing; nil 2 （姓氏） a surn...
  • 毒 : Ⅰ名詞1 （對生物體有害的性質或物質; 毒物） poison; toxin 2 （毒品） drug; narcotics 3 （姓氏） a s...
  • 株 : Ⅰ名詞1. （露在地面上樹木的根和莖） root and stem of a tree above the ground 2. （植株） individual plant; plant Ⅱ量詞（棵）
  1. Aphid count on plants in fields do not correlate with virus spread in the same fields.

    田間植株蚜數與同塊田內病毒的擴散程度間無相關性。
  2. The results of biological tests have demonstrated that allantoic fluid of the first passage virus did n ' t produce macroscopic pathogenic role to chicken embryos and after passaged for four times, gross lesions were observed in chicken embryo. the virus showed typical coronavirus under electron - microscope and it could n ' t form plaque in cef cells and could hemagglutinates chicken red blood cells after treatment with 1 % trypsin. to surprise, the virus replicated in cef cells also showed hemagglutination activity to chicken red blood cells. in addition, the spf chickens which inoculated with the virus isolated from the chicken damaged tissue showed clinical sign and grow lesion, but it ' s gross lesion did n ' t resemble to those of field outbreaks

    生物學特性：雞胚尿囊液經離心、磷鎢酸負染后，電鏡觀察該病毒為典型的冠狀病毒；該毒株的第一代尿囊液對雞胚無肉眼可見的致病作用，當繼代到第5代后，胚體嚴重病變；病毒在雞胚中隨著接種時間的延長，其效價增高， 96h可達到48h的2倍；該毒株可在cef上生長，但不能形成明顯的蝕斑；經1胰酶處理后可凝集雞紅細胞；雞胚的第四代尿囊液病毒回歸動物體，病死雞腎臟呈典型的花斑腎，腺胃則未見肉眼可見的病變。
  3. The herpesiruses bring untold suffering, but may not be all bad. chronic latent infection with specific iral strains protects mice against some bacterial infections, a nature study reeals this week1

    皰疹病毒帶來的痛苦自不必說，但是也不是一無是處。本周的《自然》上說，某些病毒株的持續潛在感染能保護小鼠免受一些細菌的感染。
  4. The herpesviruses bring untold suffering, but may not be all bad. chronic latent infection with specific viral strains protects mice against some bacterial infections, a nature study reveals this week1

    皰疹病毒帶來的痛苦自不必說，但是也不是一無是處。本周的《自然》上說，某些病毒株的持續潛在感染能保護小鼠免受一些細菌的感染。
  5. Precocity ; endless growth ; growing trend is medium, and is able to bear or endure low temperature, it is strong to be able to seat fruit under low light level power, the fruit expands fast, the fruit is high and round, the pink, no green shoulder epidermis is smooth and bright, in good order, the single fruit weighs about 300g, thick flesh ; small ventricle, bear or endure storage and transportation, taste good, commodity nature is good, high resisted leaf mildew, droop, viral disease

    特徵特性：早熟植株無限生長，長勢中等，耐低溫，耐弱光下座果力強，果實膨大快，果實高圓型，粉紅色，無綠肩表皮光滑亮麗，整齊度好，單果重300克左右，果肉特厚心室小，耐貯運粉果精品，味好品質佳，商品性好，高抗葉霉病、枯萎病、病毒病。
  6. Water fleas daphnia magna was fed both toxic alga microcystis aeruginosa ds and nontoxic alga m. aerztginosa 573 for 7 ~ 14 days under laboratory condition

    摘要用銅綠微囊藻有毒株ds和無毒株573喂養大型? ，觀察微囊藻對蟲體的生長和繁殖的影響。
  7. It was interested that there was an extra six nucleosides insertion between 1647 - 1652nt ( according to the genomic sequence of la sota strain ), and the sequence were cccccc in f48e9 strain, and tcccac in zj1 strain. in order to test if insertion of this six nucleosides is related with the virulence of nd, two primers were designed to amplify the same fragment of another ten ndv strains. the result of sequence comparison of 16 strains showed that the six nucleoside was absent in lentogenic strain. this suggested that the six nucleosides insertion might have relationship with the ndv virulence. compared with all known sequence of ndv. there was a special sequence ( 5 ' tctctctcctctctcctcc3 " ) in the genomic cdna of ndv f48e9 strain

    通過rt - pcr方法擴增獲得了另外10個背景清楚毒株的np - p基因間隔區片段，將這些序列與f48e9 、 lasota 、 clone30 、 b1 、 zj1和v4的相應序列進行了比較，結果在參比的16個ndv毒株中在該區段中除了有多個點突變外，個別毒株有堿基插入和缺失，所有以lasota株為代表的弱毒株均無6堿基的插入，而以f48e9株為首的強毒株均有此6堿基的插入，但有一個中等毒力的毒株dp沒有6堿基的插入，不過它的基因序列和lasota的幾乎相同，對于所克隆到的基因的代表性還有待確定。
  8. You ca n ' t tell just by looking whether pollen containing a foreign gene can poison butterflies or fertilize plants miles away. that invisibility is precisely what worries people

    光憑外觀，你無從知道含有外源基因的花粉粒是否會毒害蝶兒，或是傳播到幾公裡外使其他植株受精。
  9. The chromosome walking adapter consisting of 40nt and 44nt oligonucleotides was designed and synthesized

    結果顯示， b8和b8f具有弱的一過性毒力，而b8b菌株無毒力。
  10. The rest mutations in pp38 and pp24 are at random. sequence analysis also shows the first 195 nuclear acids of pp38 and pp24 are the same except for the 81 site ( g / c ), but this mutation does not cause the change of amino acid. we regard this as a genetic marker connecting with geography in the evolution of mdv but not related to isolated time and pathotype of different strain of mdv i

    對pp24基因和pp38基因進行同源性比較分析的結果表明，絕大多數毒株二者的前195個核苷酸完全一致，不同毒株間的第81位核苷酸的差異（ g / c ）並不引起編碼的氨基酸變化，僅僅與地域分佈有關，這很可能是mdv在長期病毒衍化過程中形成的地域性遺傳標志，而與病毒的分離年代及mdv的致病型等因素無關。
  11. Using conjunction mobilization, we screened the mutant of eaggec 17 - 2 with the mutant phenotype by one step. compared mutant and eaggec 17 - 2, the experiments such as growth under iron - deficient conditions, virulence testing to the mouse, and ybt biosynthesis and regulation showed that ybtp, ybtq and ybtx genes have no significant effects on iron uptake, mouse virulen

    Eaggec17毛攜帶的hpi毒力島的功能研究eaggec172的ybtp 、 ybtqyybtx突變株沒有表現出鐵缺陷培養條件下的生長抑製表型，對ybt的合成無明顯影響；對野生株與ybtp突變株的鼠毒力對比實驗表明， lds 。
  12. 4. effect of resolution vector on the expression of pesticidal crystal protein genes this work successfully introduced pesticidal crystal protein genes into crystal negative strain bmb171 by using resolution shuttle vectors. after resolution, the expression of cry1ac and cry 1c genes have no obvious change, but the expression of cry3a genes has great increase in the same condition

    解離反應對殺蟲晶體蛋白基因表達的影響成功地利用解離載體將crylac10 ， crylc和cry3a基因導入蘇雲金芽胞桿菌無晶體突變株， crylac和crylc基因解離前後的表達量和殺蟲毒力未見明顯變化， cry3a基因在相同條件下則表達量有所提高，至於為何只對基因cry3a有作用尚不清楚，國內外也未見有人作相關報道。
  13. The result shows that the high degree of homology of e2 sequences and 426 residues amino acid sequences existed in the strain hclv, hcv - jn, hcv - yc, fc and the epitopes between the four strains are not variable obviously by analysising the variation of some main amino acid residues substitutions of e2 major antigenic domains, confirming initially immunization with hcv vaccine strain can resist challenging of field strains

    結果發現， hclv與fc間核苷酸及氨基酸序列的同源性分別為98 . 3 、 99 . 2 ；兩個野毒株與hclv和fc株之間的同源性也分別在98以上，與alfort株的同源性最低，分別在83 、 89左右。據此，可推測hclv 、豬瘟野毒株和c株之間的e2基因序列及氨基酸序列無明顯差異。
  14. 22 strains of ndv of four genotypes ( ii, vi, vii, and viii ) of chicken, goose, and pigeon origin, were studied by the means of seven molecular antibodies prepared against the ndv f protein. weak antigenic heterogeneity was found among these strains and the difference beared no relation to different genotypes

    根據針對ndv融合蛋白（ f ）的7株單克隆抗體與22個不同基因型不同來源ndv毒株的反應情況，初步證實這些ndv毒株f蛋白存在抗原表位的細微差異，但這種差異性與不同基因型間無必然的相關性。
  15. In addition, molecular experiments indicated that resistance was not relevant to copy number or to insertion sites, but instead to the repeated gfp structure and to methylation of genomic dna. pvx vectors were constructed that contained the s6 gene of rbsdv vi and the 14 kd fragment of bnyvv rna2

    分子檢測結果顯示， gfp3植株中普遍存在gfp基因的沉默現象，且gfpdna的甲基化程度明顯高於gfp1植株，說明這些植株對于病毒的抗性與目的基因的插入位點及拷貝數和無關，但與串聯重復的gfp基因結構形式密切相關。
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