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   内有丝分裂 的翻译结果: 查询用时:0.53秒
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内有丝分裂
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  “内有丝分裂”译为未确定词的双语例句
     The hydra were cut transversely at the middle of their column 12 hours, 24 hours and 36 hours after feeding: 1) The number of metaphase cell was counted by examining the upper organisms, which were cut along the section and then were weighed;
     分别将饱食后 1 2h、2 4h、36h的水螅于胃腔中部横切 :1 )检查了下段横切面一定重量组织内有丝分裂处于中期的细胞数目 ;
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     2)The number of metaphase cell was counted in the lower organisms by the same method, when the animals had recovered for 12 hours, 24 hours and 36 hours.
     2 )经 1 2h、2 4h、36h修复后检查了上段一定重量愈合组织内有丝分裂处于中期的细胞数目 .
短句来源
     The results indicate that: 1) In the same weght after feeding, the number of metaphase cell in the organisms which were cut 24 hours after feeding is the most;
     结果表明 :1 )水螅在饱食1 2h、2 4h、36h后 ,同一单位重量组织内有丝分裂处于中期的细胞数目以饱食 2 4h时为最高 ;
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     2) In the same weight after repairing, the number of metaphase cell in the organisms which were cut 36 hours after repairing is the most;
     2 )其创伤面经 1 2h、2 4h、36h修复后 ,同一单位重量组织内有丝分裂处于中期的细胞数目以修复 36h为最高 ;
短句来源
     3)The number of metaphase cell in the organisms after repairing is accfordingly more than in the organisms which was just examined after being cut.
     3)修复后愈合组织内有丝分裂处于中期的细胞数目均相应地高于横切后即时检查的数目
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  相似匹配句对
     It seems that not all the network magnetic flux is the remnant of active region magnetic flux.
     网络?
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     internal oxidation
     氧化
短句来源
     Not like other intranuclear proteins, SP22 has no intranuclear localization sequence.
     在有丝分裂时部分SP22转入核
短句来源
     Mitotic Cell Death
     有丝分裂细胞死亡
短句来源
     Mitotic Division and Karyotype Analysis of Russian Wildrye Grass
     新麦草有丝分裂及核型分析
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  endomitosis
resulting from endomitosis of the vegetative cell would be 'homozygous' and stable, whereas D.H.
      
In this paper we also discuss the exceptions to the 2?:?1 EBN ratio, and report the evidence for endomitosis in the polar nuclei to explain exceptions to the EBN model in the potato.
      
However, in low concentrations which may have a pronounced cytostatic effect VELBE will not stop completely the DNA synthesis, and therefore by endomitosis more tetraploid cells can appear.
      
However, the tetrads formed were in fact two dyads that resulted from induced endomitosis.
      
Other factors such as endoreduplication, endomitosis, abnormal microtubules arrangement and DNA damage may have induced polyploidization during early stages of callogenesis.
      
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五、摘要本文对500伦X射綫照射后初期蚕豆根端細胞有絲分裂各期比例的变化进行了分析,所得結果总結如下: 1.照射后30分钟內有絲分裂指数(分裂細胞占全部細胞的9%)与对照组无明显差別。自照射后1小时分裂指数开始表現出下降的趋势,照射后3小时下降才很明显,降为对照組的66%。 2.照射后3分钟看到前期占分裂細胞的比例減少,而中期比例增加。前期比例的减少可能是由于射綫的作用使間期末細胞不能进入前期,而一部分晚前期細胞轉入中期的結果。中期比例的增加是由于一方面有前期细胞进入中期,另方面中期过程受到阻抑。虽然中期过程受阻,但后、末期細胞占分裂細胞的比例并未減少,因此說明几乎沒有末期細胞轉入間期。 3.照射后3分钟看到中期比例增加,30分钟看到早后期比例增加,照射后30分钟至3小时带桥的后、末期細胞数不断增加。这一系列变化是由于輻射对染色体作用的“生理学”效应,即由于射綫作用使染色体表面的粘着性升高,从而中期和早后期过程变慢,并产生染色体桥。 4.照射后30分钟看到中期比例比照射后3分钟減少,而后期比例增加。这說明前期細胞未进入中期,而一部分中期細胞已轉入后期,另外后期过程遭到了阻抑。这时看到末期比例比照射后3分钟減少...

五、摘要本文对500伦X射綫照射后初期蚕豆根端細胞有絲分裂各期比例的变化进行了分析,所得結果总結如下: 1.照射后30分钟內有絲分裂指数(分裂細胞占全部細胞的9%)与对照组无明显差別。自照射后1小时分裂指数开始表現出下降的趋势,照射后3小时下降才很明显,降为对照組的66%。 2.照射后3分钟看到前期占分裂細胞的比例減少,而中期比例增加。前期比例的减少可能是由于射綫的作用使間期末細胞不能进入前期,而一部分晚前期細胞轉入中期的結果。中期比例的增加是由于一方面有前期细胞进入中期,另方面中期过程受到阻抑。虽然中期过程受阻,但后、末期細胞占分裂細胞的比例并未減少,因此說明几乎沒有末期細胞轉入間期。 3.照射后3分钟看到中期比例增加,30分钟看到早后期比例增加,照射后30分钟至3小时带桥的后、末期細胞数不断增加。这一系列变化是由于輻射对染色体作用的“生理学”效应,即由于射綫作用使染色体表面的粘着性升高,从而中期和早后期过程变慢,并产生染色体桥。 4.照射后30分钟看到中期比例比照射后3分钟減少,而后期比例增加。这說明前期細胞未进入中期,而一部分中期細胞已轉入后期,另外后期过程遭到了阻抑。这时看到末期比例比照射后3分钟減少,可能有一小部分末期細胞完成分裂过程轉入了間期。 5.照射后1小时后期比例比照射后30分钟减少很多,說明在照射后30分钟至1小时期間已有一部分后期細胞进入末期。虽然如此,末期比例并未增加。因此,說明末期細胞也有一部分进入了間期。 6.照射后3小时前期占全部細胞的%与照射后1小时并无差別,但占分裂細胞的%大大增加。中期比例略有減少,而后期和末期減少甚多,并且这时看到的后、末期細胞大多具染色体桥。說明这时后、末期細胞大多数已进入間期,而那些不正常的剩下未动。前期过程遭受阻抑而未进入中期,中期細胞只有一部分进入了后期。过去有些作者对照射后2、3小时前期比例增加現象的原因提出过各种推测意見,本文对这些意見进行了分析討論。

Variation of chromosomes of pollen calli derived from anther culture and those of somatic cells of 54 plants was exmined. It was found that most of them were mixoploids, but according to the different basic number (x) of chromosomes, a great number of pollen wheat were haploid a homozygous diploid plants. Meanwhile, 5x plants and typical mixoploid plants with anther culture were obtained for the first time, and chromosome dicentrilization was observed in the pollen calli.Endomitosis, karyomixis, multipolar mitosis...

Variation of chromosomes of pollen calli derived from anther culture and those of somatic cells of 54 plants was exmined. It was found that most of them were mixoploids, but according to the different basic number (x) of chromosomes, a great number of pollen wheat were haploid a homozygous diploid plants. Meanwhile, 5x plants and typical mixoploid plants with anther culture were obtained for the first time, and chromosome dicentrilization was observed in the pollen calli.Endomitosis, karyomixis, multipolar mitosis and chromosome break of the somatic cells were easily induced by culturing in vitro and by pollen haploidy. These abnormal mitotic processes have caused chromosome doubling, the production of mixoploids and new forms of chromosomal variation.Studying the effect of the stage of pollen development on anther culture in vitro, and on the improvement of culturing conditions and methods may be possible to increase the frequency of pollen plants and spontaneous doubling, and obtain new forms of chromosomal and genome variation. It may be a new approach with potentiality to chromosome and genome engineering.

研究了用花药培养方法诱导出来的小麦花粉愈伤组织和54个当代植株体细胞染色体的变异情况。发现它们大多是混倍体,但根据其染色体基数的不同,大量的花粉小麦是单倍体和纯合二倍体植株。同时,我们还首次获得了用花粉培养诱导的小麦5x植株和典型的混倍体植株在花粉愈伤组织中观察到染色体双着丝化现象。 离体培养和花粉的单倍性容易引起植物体细胞的核内有丝分裂,核融合,多极有丝分裂以及染色体断裂等现象。这些有丝分裂的异常过程,是产生染色体加倍、混倍体以及染色体变异的各种新类型的重要原因。 研究花粉发育时期在花药培养中的作用,改进培养条件和方法,不仅可以提高诱导花粉植株和提高花粉植株自然加倍的频率,同时还可能获得染色体和染色体组发生变异的新类型,为研究染色体工程和染色体组工程开辟新途径。

The chromosome of somatic cells of 20 four-five year old plants induced by anther culture were examinined and the variation in the chromosome number was studied The results are.1、These Poplar pollen plants are mainly mixoploid;in different plants are not only 1-4n euploid cells, but also aneuploid somatic cells, mainly diploid cells and aneuploid cells;the latter probably arise from multipolar cell division.2、In different individual plants, the pereentage of different euploids and aneuploids are different, which...

The chromosome of somatic cells of 20 four-five year old plants induced by anther culture were examinined and the variation in the chromosome number was studied The results are.1、These Poplar pollen plants are mainly mixoploid;in different plants are not only 1-4n euploid cells, but also aneuploid somatic cells, mainly diploid cells and aneuploid cells;the latter probably arise from multipolar cell division.2、In different individual plants, the pereentage of different euploids and aneuploids are different, which directly effect the growth of plants. Those containing mainly diploid cells grow faster;those containing mainly aneuploid cells grow slower.3、During the process of growth ploidy of the chromosome of somatic Cells of pollen plants varies continuously. Haploids may change into diplo;ds, i. e. autoploidy, probably due to intranuclear mitosis and nnclear fusion.

观察了用花药培养方法诱导出来的4—5年生20个当代植株体细胞染色体在数量上的变异,其结果如下: 1、杨树花粉植株基本上为混倍体、即在同一植株内不仅存在1—4倍的正倍体细胞,而且也有介于1—2倍体间的非正倍体细胞,其中以二倍体细胞和介于1—2倍体问的非正倍体细胞占多数。而后者的产生可能与多极有丝分裂有关。 2、不同植株中各种正倍体和非正倍体细胞所占比例不同,且直接影响植株的生长势。就中东杨花粉植株来看,生长快的植株中二倍体细胞占多数,生长慢的植株中介于1—2倍体间的非正倍体细胞占多数。 3、在生长过程中,花粉植株体细胞染色体倍数性在变化,有由单倍向二倍体转变即自然加倍的趋势。核内有丝分裂及核触合等有丝分裂的异常过程可能是其重要原因。

 
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