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   gene (s) 的翻译结果: 查询用时:0.06秒
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  相似匹配句对
    On Gene Diagnosis
    略论基因诊断
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    GENE IMMUNITY
    基因免疫
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    On Gene Patenting
    基因的专利问题
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    OBESE GENE
    肥胖基因
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Observations on the morphology of BJAB cells were made before and after infection with Epstein-Barr Virus (EB virus) under scanning electron microscope. The surface of uninfected BJAB cells was covered with filopodia instead of microvilli which are the major surface feature of cultivated Burkitt lymphoma cells. One day after infection, the filopodia became somewhat thick and short in a portion of cells, while in the others the filopodia even virtually disappeared and the surfaces seemed to be undulated with...

Observations on the morphology of BJAB cells were made before and after infection with Epstein-Barr Virus (EB virus) under scanning electron microscope. The surface of uninfected BJAB cells was covered with filopodia instead of microvilli which are the major surface feature of cultivated Burkitt lymphoma cells. One day after infection, the filopodia became somewhat thick and short in a portion of cells, while in the others the filopodia even virtually disappeared and the surfaces seemed to be undulated with varying number of scattered "fingerlike" projections. This type of surface morphology was more predominant in the third day's infected preparations, and furthermore, clusters of blebs began to be observed. The number of bleb cells increased afterwards, at the seventh day a majority of cells had a "bleb-like excresence" appearance, very similar to the characteristic surface morphology of human myeloma cells. This typical surface architecture maintained without observable change during cell passages in vitro at least for five months. Since infection with inactivated EB virus could not induce such effects on BJAB cells as that mentioned above, it is considered the presence of EB virus genome and the expression of viral gene(s) might be involved in the changes of BJAB cell surface morphology.

在扫描电镜下观察BjAB细胞在感染EB病毒以后表面形态的变化。未受感染的BjAB细胞以表面布满丝状伪足者最多见。感染1天后,部分细胞丝状伪足缩短变粗,另部分则丝状伪足几乎全部消失,细胞表面略现皱褶和分布着疏散的“手指样”结构。感染后3天时细胞突出的变化是表面皱褶更明显,更多见;而且开始看到表面泡状结构。这种泡状结构的细胞在感染5天时数量增多,而7天后大部分细胞已呈“泡样瘤”状。观察感染后5个月的细胞,这种表面结构仍保持不变。由于用灭活的EB病毒在相同条件下感染这种细胞,表面形态未见改变,所以这种表面形态的变化应与EB病毒感染,并设想同EB病毒基因组的存在和表达有关。

Investigations made on the reciprocal crosses between indica and japonica revealed that seed sterility generally occurred in different degree in the hybrids,the percentage of sterility varied with the parental cultivars used,segregation among plants and variation among panicles were observed in F1 and F2,reciprocal crosses always gave different results and numerical variation appeared in.large measure and variable.Analyses were made on F2 data collected from different cases of backcross and from cultures of...

Investigations made on the reciprocal crosses between indica and japonica revealed that seed sterility generally occurred in different degree in the hybrids,the percentage of sterility varied with the parental cultivars used,segregation among plants and variation among panicles were observed in F1 and F2,reciprocal crosses always gave different results and numerical variation appeared in.large measure and variable.Analyses were made on F2 data collected from different cases of backcross and from cultures of selected single spike.Pollens collected from intervarietal hybrids were differentially assorted.Pollen sterility generally occurred in intervarietal hybridization,segregation and variation,were observed in every case.On plotting the percentage of pollen sterility against the percentage of seed sterility,the dependence of the latter on the former appeared quite evident.Based on these facts,it is suggested that semi sterility of rice hybrid would not be considered as an.unit class.The gene(s) and the cytoplasmic gene(s) hypotheses about sterility are separately discussed.It seems that in the case of intervarietal cross,effects of hetereogenetic cytoplasm on the microsporogenesis would be considered as a determinant factor.Hence,a model describing the genetic basis for intervarietal sterility is suggected as depicted in figure 3.

籼粳稻亚种间正反交多组合杂种不育的考察,表明籼粳杂种F_1普遍出现结实率不同程度降低,不实率随品种组合而异,有株间分离,穗间变异,正反交差异。数据变异幅度很宽而且不稳定。分析了不同方式回交与单穗选育所得的F_2数据,表明杂种不育的分布可因反回交而缩小,不实率可因选穗而提高。对杂种花粉育性作统计,表明籼粳杂交普遍使花粉趋于败育,花粉育性有分离与变异。作图表明花粉败育率与种子不实率呈直线相关。根据上述结果,对不育基因的假说进行了讨论;认为亚种间杂交中异源细胞质的竹用是小孢子发育发生波动的决定因素。提出了籼粳杂种不育遗传基础的模型,其中心环节是细胞质内蛋白质与酶的平衡在籼粳杂合基因组作用下发生了摆动。

Eighteen resistant varieties with one susceptible check were grown at different nitrogen levels and inoculated with blast fungus (strains 75-49 and 75-49-2) at Seedling stage.According to the influence of nitrogen levels on resistance to blast, the resistance of varieties tested,were classified into 3 groups. Group 1:12 varieties were resistant to the strains tested and showed no difference in reaction at various nitrogen levels. The varieties included Tetep, Zhai-tang, Chi-Kuai-ai-xian, Nong-shi 4, Zhaiye-qing...

Eighteen resistant varieties with one susceptible check were grown at different nitrogen levels and inoculated with blast fungus (strains 75-49 and 75-49-2) at Seedling stage.According to the influence of nitrogen levels on resistance to blast, the resistance of varieties tested,were classified into 3 groups. Group 1:12 varieties were resistant to the strains tested and showed no difference in reaction at various nitrogen levels. The varieties included Tetep, Zhai-tang, Chi-Kuai-ai-xian, Nong-shi 4, Zhaiye-qing 8, Ning-wan 1, Wan-fu 1, Gu-nong 13, Toride 1, Wen-xiaa 10, Da-gen-yu and Ai jiao-bai-mi-zi. The variety Hong-jiao-zhan was resistant to strain 75-49. The resistance might be controlled by major gene(s). Group 2:5 varieties, Xiang-ai-Zao 9, Hong410,Jin-wei-ai, shun-liang Zao 2 and Zhen-long 13, were comparatively susceptible to 2 strains, wtile Hong-jiao-zhan only susceptible to strain 75-49-2, their susceptibilities wcre increased as the nitrogen level increased. These varieties were considered to possess minor resistance genes. Group 3: only one variety (Chao-liu-zao)was severely susceptible at whatever nitrogen levels. It contained no resistant: gene to the test strains. The content of γ-aminobutyric acid, glucose and fructose of group 1 and 2 varieties was more than that of group 3,whereas group 1 and 2 contained less alanine, asparatic acid, asparagine, glutamic acid and glutamine than group 3.

使用全国鉴定的18个抗病品种:特特普、砦糖、赤块矮选、农试4号、窄叶青8号、宁晚1号、晚付1号、谷农13、城堡1号、温选10号、大艮鱼、矮脚白米籽、红脚占、湘矮早9号、红410、金围矮、顺良早2号、珍龙13和1个感病品种朝六早。幼苗追施不同量的氮肥,分别接种菌株75-49和75-49-2,结果表明可将品种分为三类:第一类抗供试菌株,且不随氮肥水平发生任何变化。如前12个品种对2个供试菌株的反应和红脚占对75-49的反应,这些品种对供试菌株可能有主效抗性基因。第二类品种感供试菌株,但低氮水平发病轻,病情随施氮水平增加而加重。如湘矮早9号、红410、金围矮、顺良早2号和珍龙13对2个供试菌株的反应。这类品种虽无主效抗性基因,但可能有微效抗性基因。第三类品种对供试菌株感染,不论低氮和高氮水平发病都重,如朝六早对2个菌株的反应。这类品种可能无抗性基因。前两类品种γ-氨基丁酸和果糖、葡萄糖含量比朝六早多,而丙氨酸、谷氨酸、谷氨酰胺、天冬氨酸和天冬酰胺含量则较少。这些成份可能与微效基因控制的低水平抗性有关。

 
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