查询词典 bases

Filament bases and adjacent corolla tube papillate, glandular.

花丝基部和临近的花冠筒具乳突，具腺。

PVC has excellent chemical and corrosion resistance to a broad range of fluids including water, deionized water, most mineral acids, bases, salts and paraffinic hydrocarbon solutions.

PVC具有极好的耐化学制品及耐腐蚀性能，广泛应用于多种流体，包括水，去离子水，大多数无机酸，脱氧核糖核酸基盐，盐，以及石蜡烃类溶液。

Missions have included augmented takeoffs, supersonic flight, in-flight cycling of the weapons bay doors, air-to-air refueling, in-flight engine restarts, and cross-country flights to and from Eglin and Edwards Air Force Bases and Patuxent River Naval Air Station.

其中包括增强起飞、超音速飞行、飞行中武器舱门循环、空对空补给、飞行中发动机重启以及往返于从埃格林和爱德华兹空军基地和帕塔克森特河海军航空站的越野飞行（cross-country flight）。

The fact that the compound, 2-methyl-2-di- methylaminomethyl-5--n-pentylidenecyclo- pentanone hydrochloride (T60) possessed little anticancer activity indicated that the Mannich bases that could formed a methylene group were necessary for anticancer activity.

当环戊酮环上的Mannich碱侧链位置上引入取代基时，抗癌活性显著降低，如化合物2-甲基-2-二甲胺甲基-5--亚戊基环戊酮盐酸盐（T60）几乎无抗癌活性。这说明Mannich碱能形成亚甲基是这类化合物产生抗癌活性所必不可少的条件。

In the sequence of the third codon position bases. The "Zao 1"mtDNA code 3732 amino acids, 5 less than wild A. pernyi.

第1、2、3位碱基中AT的含量，以第3位最高，第2位最低，这一趋势与家蚕、果蝇相同。

Stamens 70-900, bases connate into short tube; filaments connate into 5-10 distinct phalanges, alternating with petals; anthers reniform.

雄蕊70-900，基部进筒部；花丝合生成为5-10离生的雄蕊束，与花瓣互生的；花药肾形。

Thus, through phenogenetic drift, the tooth has remained a stable trait in jawed vertebrates, while evolving distinct genetic bases in teleosts and tetrapods.

在遗传表型变迁过程中，有颚脊椎动物的表型保持相对稳定，而硬骨鱼和四脚动物的遗传表型改变明显。

The famciclovir was synthesized from purine by a series of steps by Acylation, Decarboxylation, Reduction ,and so on; Derivatives of these intermediates is described from the 6-chloro- 9H- purin-2-amine as raw materials in different conditions when the iodine and bromide were synthesized with the addition of two intermediate 6-bromo-9H-purin-2-amine and 6-iodo-9H-purin-2-amine; There is elaborated from the main part of a acetophenone, urineaminohydrochloride, phenylhydrazine, ethyl acetoacetate as raw material through a series of reactions to synthetic 3-phenyl-4-formylphenyl pyrazole and 5-chloro-3-methyl-1-phenyl-1H-pyrazole-4-aldehyde two pyrazole aldehyde, and then with 2-amino-6-chlorine-9-(2-methicillin-oxo-co-methyl-4-yl) purine reaction of the two new pyrazole purine Schiff bases.

本论文主是采用以鸟嘌呤为原料，经过一系列的酰基化，脱羧，还原等反应作用下最终得到了产物2-氨基-9-(4-乙酰氧基-3-乙酰氧基甲基丁基)嘌呤；其中的中间体衍生物主要是阐述从以2-氨基-6-氯鸟嘌呤为原料通过在不同的条件下进行溴代与碘代分别合成了另外两种中间体2-氨基-6-溴鸟嘌呤及2-氨基-6-碘鸟嘌呤；还有一部分主要是阐述从以苯乙酮，盐酸氨基脲，苯肼，乙酰乙酸乙酯为原料通过一系列的反应先合成3-苯基-4-醛基吡唑及5-氯-3-甲基-1-苯基-1H-吡唑-4-甲醛这两个吡唑醛，然后再与2-氨基-6-氯-9-(2-甲氧羰基丁酸甲酯-4-基)嘌呤反应得到了两个新型的吡唑嘌呤席夫碱

That is one of the best results in asymmetric catalyzed pinacol coupling reaction, which indicates that the tetradentate chiral Schiff-bases with C〓 symmetry and rigid structure may be developed into practical applications.

这说明，具有C〓对称性且其核心结构具有刚性的四齿Schiff--Base是最有希望获得有实用价值的新的手性化合物。

Male flowers: pedicel articulated at base; sepals 5, free, valvate, initially curved around stamens, later reflexed; petals and disk absent; stamens 5, free, inserted at bases of sepals; filaments short; anthers larger, thecae 2, parallel, introrse, dehiscence longitudinal; pistillode short and broad, peltate.

雄花 花梗有节在基部；萼片5，离生，镊合状，最初在雄蕊周围弯曲，后反折；花瓣和花盘无；雄蕊5，离生，着生在萼片的基部；花丝短；花药大，囊2，平行，内向，纵裂；退化雌蕊短和宽，盾形。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。