查询词典 ba

Using the main result, we also obtain a simple criterion to check if a given mathrm C^*-algebra A is Abelian, that is, A is Abelian if and only for any two positive elements a, bin A, there is a'in A such that ab=ba'.

利用文中的主要结论，还得到了判断 mathrm C^*-代数 A 是交换一个简单条件，即 A 是交换的当且仅当对 A 中的任何两个正元 a， b 存在 a'in A 使得 ab=ba'。

BA concentrations lower than 0.2 mg/L were favorable for the growth of adventitious sh...

高浓度BA有利于愈伤组织和芽的分化，低浓度则对芽的生长有利。

The plant expression vectors were constructed and two genes were transferred into A. thaliana and N. tabacum, antikanamycin plants were obtained.4. The trials of adventive bud regeneration directly and callus induction was conducted to select out the optimal explants and formula. The results revealed that double scale can produce 13~16 adventive buds per centimeter in MS medium added 10.0 mg/L 6-BA, 1.0 mg/ L NAA, 40 g/L sugar and 7.5 g/L agar. Scale, leaves, scape and different tissue of flower can be induced to produce callus in appropriate medium, but the filament with anther was the optimized explant.

构建了两个基因的pBI121和pCAMBIA1300植物表达载体，并通过农杆菌将上述基因转入烟草和拟南芥中，得到了卡那抗性的再生植株。4、以中国水仙不同部位外植体进行了不定芽直接分化和愈伤组织诱导分化试验，结果表明，双鳞片外植体在MS0+6-BA 10.0 mg/L+NAA 1.0 mg/L+蔗糖40 g/L+琼脂7.5 g/L培养基上可以大量地直接再生，再生芽数量平均可达13~16个/cm双鳞片，比传统的鳞茎盘之间分化提高30~50%；鳞片、叶片、花葶及花部不同组织在适宜的配方中均可不同程度地诱导出愈伤组织，但以带花药的花丝诱导出的愈伤组织最好。

Extrogenous K〓 and Ba〓 have main effects on the quantity and structure of amyloplast , and it is most significant within one month after full bloom.

外源K〓和Ba〓对果肉细胞超微结构的影响主要是对造粉体的数量及形态的影响，花后1个月内使用，影响最大。

Effects of explants,2,4-D,6-BA,NAA and AgNO3 on inducing buds were studied in pineapple(Ananas comosus cv.Hawaii) by using orthogonal design.

采用菠萝试管苗的叶片、叶鞘、茎段和茎薄片作外植体，以MS或1/2 MS为基本培养基，应用正交试验设计方法研究了不同浓度的2，4-D、6-BA、NAA和AgNO3对夏威夷菠萝不定芽的诱导效果，并在添加不同激素组合的培养基中进行芽的增殖和生根培养研究。

The chemical composition of Pingyang gneissic granite with high contents of SiO〓, Na〓O, Sr and Ba was inherited and developed from that of mainly biotite gneiss through anatexis under the background of regional migmatisation, it might also be introduced the fluid material from deep.

平阳片麻状花岗岩的化学成分是在区域混合岩化对岩石成分总体改造趋势的背景下，在黑云斜长片麻岩成分的基础上，通过黑云斜长片麻岩的深熔以及可能的变质脱水反应流体和深部流体的加入演变而成，富SiO〓、Na〓O以及Sr和Ba。

The results showed that the trace elements were not anomalously enriched. Zn and Cu existed in sphalerite. Cr, Pb and Cd were adsorbed by clay minerals. Ba might exist in ankerite and calcite. Ni, Mo, Co and As mainly existed in pyrite. Be and Se were combined with organics. Many trace elements were difficult to volatilize. Because of high content and volatility, Pb and Zn, are harmful to environments; Zn and Pb separately exist in sphalerite and clay minerals, so it is easy to reduce their environmental damage by washing and processing of coal.

结果表明：研究的元素没有异常富集；Zn和Cu赋存于闪锌矿中，Cr、Pb和Cd被粘土矿物吸附，Ba可能赋存于铁白云石和方解石中，Ni、Mo、Co和As主要赋存于黄铁矿中，Be和Se以有机结合态存在；研究的元素大多不易挥发，但Zn和Pb易挥发，且含量较高，环境危害较大，Zn和Pb分别赋存于闪锌矿和粘土矿物中，可通过洗选脱除减小其危害。

Results showed that expansion coefficient exhibited anomalous behaviours, which at the -80℃ transition phase point temperature that are caused by Jahn Teller of "Ti—Ba—Ti—"on Barium Titanate, at same time, we also discussed that dielectric constant affected by the rate of vacancy on barium titanate.

结果表明在钛酸钡的三个相变温度点（120℃、8℃、－80℃）处，热膨胀系数反常变化，我们认为相变温度为－80℃处的热膨胀反常是因钛酸钡BaTiO3中对称元"Ti—Ba—Ti"的静态畸变造成。同时本文讨论了BaTiO3中空隙对其介电常数的影响。

The results suggested that protein content was increased under 6-BA treatments, but single grain weight and starch content were decreased after anthesis.

上述结果表明6-BA处理促进了籽粒蛋白质的合成，但降低了籽粒质量和淀粉的合成，旗叶处理较穗处理作用大。

For comparison, ordinary aqueous precipitation method was used to prepare barium carbonate by using Ba(NO3)2 and NH4HCO3 as the reactants. The influences of adding sequence of the reactants and surfactant et al. on the products were discussed.

此外，以Ba(NO_3)_2与NH_4HCO_3为反应起始物，采用沉淀法研究了制备BaCO_3的影响因素，考察了加料方式、表面活性剂等因素对产物形貌的影响。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失