查询词典 tertiary

It indicated evidently tropical floristic remnant and affinity in the Alsophila spinulosa community. Comparing with the fossil flora from late Cretaceous and Tertiary (i.e. Northeast China flora, Fushun flora in Liaoning, Jinggu flora in Yunnan and Shanwang in Shandong) in China, pteridophyte flora of the Reserve was quite similar to that of late Cretaceous. Nevertheless, its spermatophyte flora was little similar to that of Tertiary, where angiosperm were booming in that period.

将之与中国晚白垩纪和新生代第三纪中国东北、辽宁抚顺、云南景谷、山东山旺化石植物类群相比，发现桫椤群落中蕨类植物成分与其晚白垩纪化石植物群有着高度的相似性，而其种子植物组成与其后兴起的第三纪被子化石群不甚相似。

So the effect of different solvents, such as methanol, ethanol, butanol, tertiary butanol, isoamyl alcohol, tertiary amyl alcohol, diethyl ether and cyclohexane, on the reaction was explored.

在文献所报道的应用K〓CO〓作催化剂、CH〓I既作促进剂又作部分反应物的由原料甲醇与二氧化碳直接合成碳酸二甲酯工作的基础上，在体系中加入离子液体emimBr后，研究了emimBr对合成反应的影响。

The cold state modelling test and theoretical analysis for arc tangent tertiary air determined the arc tangent degree of tertiary air.

对三次风反切进行冷态模化试验和理论分析，确定了三次风反切角度。

Leaves simple, commonly opposite and decussate with one of a pair slightly smaller than other, rarely verticillate or alternate by abortion of one of a pair, usually 1-4(or 5) secondary veins on each side of midvein, originating at or near base and anastomosing apically, tertiary veins numerous, parallel, and connecting secondary veins and midvein but in Memecylon secondary veins pinnate and tertiary veins reticulate.

托叶无。单叶，通常对生和交互对生的具其中一片较小的叶，很少轮生的或由于一对中一枚败育而互生，通常次脉在中脉两边各1-4(或5)，发生在基部或近基部，在顶部网结，支脉多数，平等，与次脉和中脉相连但在 Memecylon中，次脉羽状和支脉网状。

Quaternary ice age it is a refuge for Tertiary flora and fauna, which retained a large number of biological Tertiary relict species.

它在第四纪冰川期是第三纪动植物的避难所，因而保留了大量第三纪生物残遗种。

Mainly belonged to Loranthaceae. Plants of Phacellaria Benth. and their hosts were mainly distributed in tropical and subtropical area. Plants of Phacellaria Benth. maybe originated in tropical area in the south of China before Tertiary. Their ancestors were parasitic on ancestors of some plants of Loranthaceae by chance during Tertiary. It took them millions of years to form a sturdy relationship between parasites and hosts. Ph. rigidula was a hemi-parasitic subshrub. In area observed, its host was mainly Taxillus caloreas var. fargesii.

的硬序重寄生(Ph.rigidula)及其寄主植物做为研究植物与植物间协同进化的材料，对重寄生属植物的起源、与其寄主的分布、硬序重寄生的形态学特性、解剖学以及化学成分进行了研究，结果表明：重寄生属植物主要寄生在桑寄生科植物上，分布区与其寄主的基本一致，均主要分布在东南亚和中国南部的热带与亚热带地区；重寄生属植物可能起源于第三纪之前某一时期的华南热带地区，随后向周边地区扩散。

One route was that the amino-groups on the silica gel were transformed to tertiary amines by Eschweiler-clarke reaction that amine-groups react with formaldehyde and methanoic acid to prepare tertiary amines; the silica gel intermediates with tertiary amine groups reacted with chorohydrocarbons to prepare insoluble silica gel quaternary ammonium salt bactericides. Another route was that the amino-groups on the silica gel reacted with excessive chlorohexadecane; the preparing intermediates were quaternized with iodomethane to obtain insoluble silica gel quaternary ammonium salt bactericides.

一条路线是根据埃施韦勒-克拉克(Eschweiler-clarke)胺甲基化反应，进行胺基叔胺化反应，制成带有叔胺官能团的硅胶中间体，此中间体上的叔胺与卤代烷反应生成杀菌活性官能团季铵盐，制成硅胶类水不溶性季铵盐杀菌剂；另一条路线是带有胺反应活性中心的硅胶与过量正氯代十六烷反应，得到的中间体再用碘甲烷季铵化，得到最终产品——水不溶性季铵盐杀菌剂。

Objective To explore the toxic effects and mechanism of methyl tertiary-butyl ether in the brain tissues of fetal mice and pregnant mice.

目的：探讨甲基叔丁基醚(Methyl Tertiary Butyl Ether， MTBE)对孕鼠及其胎鼠脑组织的毒作用及分子机制。

Accordingly, we start the thesis from two small oil fields of Beipu and Laoyemiao in Nanpu depression. Firstly, we analyze regional geology background of the area and find that its structure evolvement can be divided into three greatest stages: the formation and evolution of pre-tertiary basement, the lower-tertiary fault basin and the upper-tertiary depression basin.

因此本论文从南堡凹陷北堡和老爷庙两个小型油田入手，首先分析了研究区的区域地质背景，明确了其构造演化分为三大阶段：即前第三纪基底的形成与演化、早第三纪断陷盆地的形成与演化、晚第三纪坳陷盆地的形成与演化。

By studying the inorganic CO〓 and helium isotopes in Yinggehai Basin, and investigating the Tertiary lithology and geothermal condition, combined with the results of thermal simulation test, it was suggested that inorganic CO〓 gas principally came from thermal decomposition of Tertiary calcareous shales and Pre-Tertiary carbonate under the burial depth of 6000m, approximately at a strata temperature of about 250℃.

通过系统地剖析莺歌海底辟带气田无机CO〓的碳、稀有气体同位素特征与第三系及古生界基底的岩性及热源条件，结合热模拟实验资料，认为无机CO〓主要来深埋的梅山-三亚组钙质泥岩热分解和前第三系基底碳酸岩的热变质，这种钙质泥岩和碳酸岩热分解产生CO〓的初始温度大约为250℃，相当于埋深约6000m。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。