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  2a型
     Eupatorium odoratwn 2n=60=46m+14sm(2sat),2A type;
     飞机草2n=60=46m+14sm(2sat),2A型
短句来源
     Bidens pilosa ( white flower) 2n=72=40m (2sat) +32sm(4sat),2A type;
     三叶鬼针草(白花)2n=72=40m(2sat)+32sm(4sat),2A型
短句来源
     Bidens pilosa ( yellow flower) 2n=72=46m+26sm(2sat),2A type;
     三叶鬼针草(黄花)2n=72=46m+26sm(2sat),2A型
短句来源
     were analyzed. The result indicated that the cepa,fistulosum and caespeitosum were with the similar karyotype which belong to 2A type,and the karyotype formula was 2n=2x=16=14m+2st(SAT),2n=2x=16=12m+2sm+2st(SAT) and 2n=2x=16=2M+12m+2st(SAT) respectively.
     结果表明,洋葱、大葱和分葱的核型比较相近,均属进化程度较低的2A型,其核型公式分别为2n=2x=16=14m+2st(SAT),2n=2x=16=12m+2sm+2st(SAT)和2n=2x=16=2M+12m+2st(SAT);
短句来源
     Its karyotype could be formulated as 2n=2x=24=4 m+7 sm(2SAT)+1 st,belonging to Stebbins's 2A type.
     秤锤树核型为 2 n=2 x=2 4 =4 m+7sm(2 SAT) +1st,属于较为原始的 2 A型。
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  2a类型
     The present paper deals with the karyotype analysis of Picea asperata Mast, endemic to China. The karyotypic formula of the species is K(2n) = 24 = 20m+4sm, which belongs to Stebbins' 2A type and the chromosome complement on relative length is 2n = 24 = 2L+ 12M2+8M1+2S.
     本文分析了我国特产树种云杉Picea asperata的核型,K(2n)=24=20m+4sm,属2A类型,染色体相对长度组成为2n=24=2L+12M_2+SM_1+2S。
短句来源
     The present paper describes the chromosome number and karyotype of flax (Linum usitatissimum L.) from Heilong jiang province, China. The result of observation showed that the somatic chromosome number is 2n=32, and the Karyotype is 2n=28M+4SM, the coefficient of asymetry is 58.52%, belongs to 2A type, and its N·F is 64.
     本文报道我国黑龙江省油亚 771 34 - 86的体细胞染色体数目和核型 2n =32 =2 8m +4sm ,不对称系数 58.52 % ,属于 2A类型对称核型 ,N·F值为 6 4。
短句来源
     The metaphase chromosomes of this species are relatively large,ranging from 5.36 μm to 2.96 μm and the average length is 4.03 μm. The karyotype is formulated as 2n=20=12m+8sm(2SAT) and categorized as stebbin's 2A type.
     染色体长度从2.96μm到5.36μm,平均长度为4.03μm,核型公式为:2n=20=12m+8sm(2SAT),为2A类型
短句来源
     The karyotypes of three strains belonged to Stebbins' 2A, 2B, 2A type, respectively.
     核型对称性分别为2A、2B、2A类型
短句来源
     The karyotypes of the genus Abies (excl. A. forrestii) are composed of metacentric and submetacentric. chromosomes and belong to 2A type (see Table 2 ).
     冷杉属植物(除川滇冷杉)的核型全由中部和近中着丝粒染色体组成,属2A类型(表2)。
短句来源
  “2 a type”译为未确定词的双语例句
     (3)That from Xinjian was K(2n)=2X=22=6m+14sm+2st,belonged to Stebbins'2A type.
     (3)江西新建种的核型公式为K(2n)=2X=22=6m+14 sm+2st,核型类型为2A。
短句来源
     Results:(1)The karyotype formula of Polygonum multiflorum from Jingxi locality was K(2n)=3X=33=9m+24sm,belonged to Stebbins'2A type;
     结果:(1)广西靖西栽培种的核型公式为K(2n)=3X=33=9m+24 sm,核型类型为2A;
短句来源
     is a peculiar species in East Asia. Chromosome number of mitotic metaphase of stem tip cells in gametophyte is n = 5. The karyotype, K(n) =5=4m+lsm, or K(n) = 5 = 4v+1J,is 2A type.
     为东亚特有种,其配子体茎尖细胞有丝分裂中期的染色体数为n=5,核型为K(n)=5=4V+1J或K(n)=5=4m+1sm,在核型分类中属于“2A”型。
短句来源
     The populations sampled from the Altai region of Xinjiang,China,are diploid(2n=10),with the 2A type karyotype and the karyotypic formula of 2n=2x=10=6m+2sm+2st.
     分布于该地区的Paeonia anomalaL. 的核型组成:2n=2x=10=6m+2sm+2st。
短句来源
     The normal diploid 2n = 16, karyotype formula based on Levean publication (1964) was K(2n) = 16 = 10m + 6sm. According to the method of S. R. Guo, the chromosome relative length was 2n = 16 = 6M2 + 10M1, which belonged to 2A type according to the Stebbins karyotype classification.
     扁茎黄芪Astragalus complanatus染色体的核型分析结果表明:体细胞染色体数目为2n=16,核型公式为K(2n)=16=10 m+6 sm,染色体相对长度组成为2 n=16=6M_2+10 M_1,核型不对称系数为59.79%,属于“2A”型,染色体总体积为50.62 μm~3。
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  a type
Nucleotide and phylogenetic analysis of the capsid protein VP2 gene classified the red panda parvovirus (RPPV) as a CPV-2a type.
      
The isolation of stable carbenes of the Arduengo (1a) and Wanzlick (2a) type has prompted us to look for stable nitrenium ions of the related structural type 1-ethyl-3-(2-chloropenyl)-1,2,3-triazolium perchlorate (6+ClO4-).
      
For large Z1Z2 a type of extra-push effect can arise from the same inelastic entrance-channel effects which enhance the fusion of lighter systems, though this will be absent in cases where the enhancement arises from neutron transfers.
      
The positive rates with ver 1 were 82% for HCV genotype 1b (type 1b), 57.6% for HCV genotype 2a (type 2a), 75.0% for HCV genotype 2b (type 2b), 55.6% for HCV genotype 3a (type 3a), and 93.8% for HCV genotype 3b (type 3b).
      
Thus, the dephosphorylation (activation) of NR in vitro is inhibited by divalent cations, and protein phosphatases of the PP1 or PP2A type are involved in both the EDTA and AMP-stimulated reactions.
      
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The radiative capture of μ-meson by proton is treated by using the renor-malized universal Fermi interaction of V-A type and Zeldowich's theory of μ mesic hydrogen. Contrary to the result of Lee, Huang and Yang, it is found that, if the effect of the strong interaction is neglected, then it is impossible for photon being emitted during the capture. The influence of the strong interaction consists of two respects, namely: the effect of the magnetic moment of the nucleon and the renormalization effect on...

The radiative capture of μ-meson by proton is treated by using the renor-malized universal Fermi interaction of V-A type and Zeldowich's theory of μ mesic hydrogen. Contrary to the result of Lee, Huang and Yang, it is found that, if the effect of the strong interaction is neglected, then it is impossible for photon being emitted during the capture. The influence of the strong interaction consists of two respects, namely: the effect of the magnetic moment of the nucleon and the renormalization effect on the universal Fermi weak interaction. The effect of the anomalous magnetic moment is negligible. However, the contribution of proton to the emission of photon is not at all small in comparison with that of the μ-meson duo to the renormalization effect on the universal Fermi weak interaction. As a result, the photons emitted are no longer 100% right hand polarized. It is estimated, that only 80% of the photons has a spin parallel to its momentum. The radiative capture rate of the μ-meson by proton is 1/(1.6×105) of the

本文利用重正化了的费米型V-A弱相互作用计算μ介子被质子吸收时所产生的辐射俘获现象。在计算中利用了余列多维奇等所指出的μ介子在俘获前停留在K层的单重态上的理论结果。计算的结果与李政道等忽略强相互作用的影响及忽略μ介子原子由三重态至单态的跃迁所得到的结果有很大的不同。我们得到当完全不考虑强相互作用的影响时μ介子被质子俘获时不能放出γ辐射的结论。其次我们考虑了两方面的强相互作用影响,一方面考虑了核子反常磁矩的影响,另一方面又考虑了强相互作用对V-A弱相互作用的重正化效应。计算结果指出:反常磁矩的贡献只为重正化效应的5%左右。由重正化效应所产生的辐射俘获几率只有李政道等所给出的几率的14%,放出的光子不再是100%右旋的,估计约有20%的左旋光子。

The relative probability of the radioative decay of π-meson to that of π-μ decay is calculated, assuming a universal Fermi interaction of V-A type. Terms in addition to those of usual gauge invariant treatment are calculated with perturbation theory. The result does not contradict the experiment.

本文应用V-A型普适费米弱作用由协变性和规范不变性的考虑,利用微扰论,计算了π介子辐射衰变的分枝比。

In order to study the distribution of the virus entities which cause“Kwuting”symptomsof Chinese cabbage on various cruciferous crop plants,diseased specimens were collected fromPeking and Tientsin throughout the growing season in 1962.Isolations and routine diagnosiswere made during 1962-63.On basis of the differential host reactions,109 isolates weregrouped into seven types,among which types Ⅰ,Ⅱ and Ⅲ being reacted with K_1 (TurnipMosaic Virus) antiserum were thus considered to be related strains.These strains...

In order to study the distribution of the virus entities which cause“Kwuting”symptomsof Chinese cabbage on various cruciferous crop plants,diseased specimens were collected fromPeking and Tientsin throughout the growing season in 1962.Isolations and routine diagnosiswere made during 1962-63.On basis of the differential host reactions,109 isolates weregrouped into seven types,among which types Ⅰ,Ⅱ and Ⅲ being reacted with K_1 (TurnipMosaic Virus) antiserum were thus considered to be related strains.These strains were de-signated K_(1-2) for type Ⅰ,K_(1-3) for type Ⅱ and K_(1-4) for type Ⅲ.Type Ⅰ neither infectedNicotiana tabacum nor N.glutinosa.Type Ⅱ did infect N.tabacum causing local lesions,butnot N.glutinosa.Type Ⅲ with its T.D.P.slightly higher than 65℃ did infect N.glutinosacausing local lesions,but might or not infect N.tabacum.Type Ⅳ being identical to theKwuting Virus 1 (A type strain of Turnip Mosaic Virus on Chinese cabbage) was designatedK_(1-1).Types Ⅴ and Ⅵ had not yet been identified,while type Ⅶ was identical to the former-ly reported virus K_3 (A ringspot strain of TMV).In fields,types Ⅰ and Ⅱ occurred more frequently.They were 59.0 and 32.0 per cent ofthe total isolates respectively.Type Ⅲ was apparently less prevalent (5.5 percent) and theother types occurred more rarely (less than 0.9 percent each).Therefore the two TurnipMosaic Virus strains K_(1-2) and K_(1-3) were the most prevalent and responsible for the epiphyto-tics of the Kwuting disease of Chinese cabbage in 1962.However,in Peking K_(1-2) was lessabundant than K_(1-3),while in Tientsin the condition was quite the reverse.The difference ofstrain dominance might be attributed to the different varieties of Chinese cabbage cultivatedin these two localities.For instance,the main Chinese cabbage variety cultivated in Pekingwas“Qinpaikou”,from which the isolates of K_(1-3) and K_(1-2) were in the ratio of 3:2.Themain Chinese cabbage variety grown in Tientsin was“Tianjinl(?)”,from which the isolates ofK_(1-3) and K_(1-2) was in the ratio 1:5.Isolates made from two kinds of seeding plants,namely the overwintered seed plants plant-ed out in spring and the seed plants grown from vernalized seeds,revealed that they wereessentially K_(1-2) and K_(1-3).It was believed that these virus entities were carried in the over-wintered seed plants and disseminated to other cruiferous plants after planting out in spring.These two essential virus entities were isolated from successive cruciferous crops throughoutthe growing season.Therefore the summer sown cabbage served as one of the principal hostsfor the virus to tide over summer,while the autumn Chinese radish which was sown usually10-15 days earlier than Chinese cabbage,served as one of the important bridge hosts.

1962年至1963年系统地调查北京及天津白菜区十字花科作物上逐月出现的病毒类型及其相对数量,以确定十字花科作物之间病毒的相互关系。从109个分离物中,根据寄主反应,区分成7个类型,其中Ⅰ、Ⅱ、Ⅲ型都和芜菁花叶病毒(白菜孤丁病毒1号即 K_1)的抗血清起反应,因此认为它们是白菜孤丁病毒1号的相关株系:Ⅰ型定为 K_(1-2),根本不侵染菸草;Ⅱ型定为 K_(1-3),能侵染普通菸,产生局部坏死斑,但不侵染心叶菸;Ⅲ型定为 K_(1-4),能侵染心叶菸产生局部坏死斑,能或不能侵染普通菸与产生局部坏死斑,致死温度稍高于65℃;Ⅳ型为典型的白菜孤丁病毒1号的原株系(K_(1-1));Ⅴ及Ⅵ型是未经鉴定的毒原;Ⅶ型是典型菸草环斑型花叶病毒(K_3)。京、津两地109个分离物中,Ⅰ型(K_(1-2))占59%,Ⅱ型(K_(1-3))32%,Ⅲ型(K_(1-4))5.5%,Ⅳ型(K_(1-1))0.9%,Ⅴ型0.87%,Ⅵ型0.87%,Ⅶ型(K_3)0.87%。其中以 K_(1-2)及 K_(1-3)(芜菁花叶病毒亦即白菜孤丁病毒1号)为主,其他类型均不重要。北京及天津两地十字花科作物上病毒类型的分布显然有些差别,在北京...

1962年至1963年系统地调查北京及天津白菜区十字花科作物上逐月出现的病毒类型及其相对数量,以确定十字花科作物之间病毒的相互关系。从109个分离物中,根据寄主反应,区分成7个类型,其中Ⅰ、Ⅱ、Ⅲ型都和芜菁花叶病毒(白菜孤丁病毒1号即 K_1)的抗血清起反应,因此认为它们是白菜孤丁病毒1号的相关株系:Ⅰ型定为 K_(1-2),根本不侵染菸草;Ⅱ型定为 K_(1-3),能侵染普通菸,产生局部坏死斑,但不侵染心叶菸;Ⅲ型定为 K_(1-4),能侵染心叶菸产生局部坏死斑,能或不能侵染普通菸与产生局部坏死斑,致死温度稍高于65℃;Ⅳ型为典型的白菜孤丁病毒1号的原株系(K_(1-1));Ⅴ及Ⅵ型是未经鉴定的毒原;Ⅶ型是典型菸草环斑型花叶病毒(K_3)。京、津两地109个分离物中,Ⅰ型(K_(1-2))占59%,Ⅱ型(K_(1-3))32%,Ⅲ型(K_(1-4))5.5%,Ⅳ型(K_(1-1))0.9%,Ⅴ型0.87%,Ⅵ型0.87%,Ⅶ型(K_3)0.87%。其中以 K_(1-2)及 K_(1-3)(芜菁花叶病毒亦即白菜孤丁病毒1号)为主,其他类型均不重要。北京及天津两地十字花科作物上病毒类型的分布显然有些差别,在北京地区 K_(1-3)占51.2%,K_(1-2)占34.1%,K_(1-4)占7.3%,其余 K_(1-1),Ⅴ及Ⅵ各占2.5%,无 K_3,而在天津地区则 K_(1-2)占68.8%,K_(1-3)占22.9%,K_(1-4)占6.3%,有 K_3的出现(2.1%),而无 K_(1-1),Ⅴ及Ⅵ。这种差异可能与当地所栽品种及十字花科蔬菜种类有关,因为北京的白菜以青白口品种为主,而 K_(1-3)和 K_(1-2)在青白口品种上的出现此数为3∶2。天津地区的白菜品种邓鄯沽大核桃纹、高杆连心壮及天津绿上的 K_(1-3)和 K_(1-2)的出现比数相应为1∶5,1∶2及3∶4。根据两种采种株,即越冬菜株及当年播的春化种子的种菜上的毒原类型分析,一般均为,K_(1-2)及 K_(1-3),而出现的次数在越年采种株上为多,可见越年采种株是白菜孤丁病毒的主要越冬寄主之一,春化种子的种菜上的病原可能是从越冬采种株上传来的,根据3—10月各种十字花科作物上病毒类型出现次数的分析,K_(1-2)及 K_(1-3)在四至五月间在留种菜、小白菜、油青菜及甘兰上达到高峯,六月间则出现在白菜及甘兰上,最后则出现在秋白菜上,其中甘兰是京津六至九月间的连续作物,因此作为主要越夏寄主的可能性更大,而萝卜则因其播种较秋白菜早10天至15天,正当传毒翅蚜的发生期,因此认为是一个比较危险的过渡寄主。

 
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