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However,using THEIC initiator,the reaction rate for epichlorohydrin is faster than that of propylene oxide and 2-butoxyxirane,respectively.

在THEIC体系,就链引发而言,环氧的大于环氧丁基醚环氧乙

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Carbon tetrabromide was prepared from acetone and sodium hypobromite by adding tetrabutylammonium bromide.The yield and purity were very satisfactory.

向次溴酸钠溶液中滴加适量的酮,在四丁基溴化铵催化下,高产率得到四溴化碳。

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Objective:To develop a GC-MS approach for the determination of tripropyltin(TPrT),tributyltin(TBT) and triphenyltin(TPhT) in fish.

建立水产品中三基锡、三丁基锡和三苯基锡的气相色谱-谱(GC-MS)分析方法。

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With the raising of partial hydrogen pressure, the cracking reaction of tert-butylbenzene is prompted, while the conversion of butylbenzene is restricted.

丁基苯的转化率随氢分压的升高而提高,正丁基苯的转化率随氢分压的升高而降低。

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A review is mainly on the application of butylrhodamine B, rhodamine 6G and tetrabromofluorescein dyes in extraction spectrophotometric and flotation spectrophotometric analysis.

本文对丁基罗丹明B、罗丹明6G和四溴荧光素在萃取光度法和浮选光度法中的了综述。

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N butyl 2 ethoxy thioacridone was prepared from o chloro benzoic acid and p phenetidine by means of Ullman reaction,cyclization,N alkylation and sulfurization.

以邻苯甲酸和对乙氧基苯胺为原料,经过胺的苯基化、二芳胺的环化、N-基化、硫代化反合成了N-丁基-2-乙氧基硫代吖啶酮。

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The technical advantages and disadvantages of natural rubber liner, chloroprene rubber liner, precuring butyl rubber liner and room temperature self-vulcanization butyl rubber liner are compared.

对比了天然橡胶衬里、丁橡胶衬里、预硫化丁基橡胶衬里、室温自硫化丁基橡胶衬里的技术优缺点。

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Generally resistant to animal and vegetable fats, oils, greases, ozone, heat, and strong oxidizing chemicals. Chlorobutyl has lowest permeability of all the synthetic rubbers.

通常适于动物脂肪或植物油、油、油脂、臭氧、热,以及强氧化剂。丁基橡胶在所有合成橡胶中的渗透性是最低的。

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The main materials we used are including silicone rubber, fluorubber, natural rubber, neoprene rubber, EPDM, butyl rubber, polyurethane, polyethylene, EVA, ABS, PP, and PVC.

使的原料有硅橡胶、氟橡胶、天然橡胶、丁橡胶、三元乙橡胶、丁基橡胶、聚氨脂橡胶、聚乙烯、聚烯、EVA、ABS、PP、PVC等。

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Both volumetric method and gravimetric method can be used for determination of Zn in thiofide ZDBC.The gravimetric method is easy to operate but it spents more analysis time.

容量法和重量法均可于测定橡胶硫化促进剂二丁基二硫代氨基甲酸锌(ZDBC)中的锌含量。

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As shown by study the extracting powers of two extraction agents are changed with acidy of developer extracting power N,N-diphenyl glycine is stronger than N-n-butyl glycine for 5 metal ions.

N,N—二苯基甘氨酸对5种金属离子的萃取能力强于N—正丁基甘氨酸。

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VOA Special 2024年7月合集

The spacecraft observed ridges, trough structures and other features on Dinkinesh. Dinkinesh has a diameter of nearly 720 meters.

该航天器在丁基内什上观察到山脊、槽状结构和其他特征。丁基内什的直径近720米。

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透视百技类

But don't worry, the butyl in your gum won't make you sick.

但是别担心,口香糖中的丁基橡胶并不会致病。

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NPR音讯 2013年4月合集

The state takes on Exxon Mobil and its lawsuit over the oil giant's use of the gas additive MTBE.

该州控告石油巨头埃克森美孚使用汽油添加剂甲基叔丁基醚。

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VOA Special 2024年7月合集

On the way, Lucy flew past Dinkinesh and Selam in the inner edge of the main asteroid belt.

在途中,露西在内侧主小星带边缘掠过了丁基内什和塞拉姆小星。

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VOA Special 2024年7月合集

Selam orbits Dinkinesh once about every 53 hours at a distance of about 3.1 kilometers.

塞拉姆约每 53 小时绕丁基内什轨道运,距离约 3.1 公里。

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透视百技类

However, most gum today is made from natural or synthetic polymers, most commonly butyl rubber.

但是,如今的口香糖由天然或人造的聚合物制成,其中最常见的是丁基橡胶。

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CRI在线 2023年11月合集

Lucy came within 435 kilometers of Dinkinesh to test its instruments for the larger asteroids that lie ahead.

“露西”号来到距离丁基内什不到 435 公里的地方,对前方较星的探测仪器进了测试。

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VOA Special 2024年7月合集

It appears, the researchers said, that a big piece of rock broke free sometime in the past from Dinkinesh.

研究人员表示,似乎在过去的某个时候,块岩石从丁基内什上脱落了。

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VOA Special 2024年7月合集

Some of this debris, they said, fell back onto Dinkinesh's surface to form a ridge structure.

研究人员表示,其中些碎片又落回了丁基内什的表面,形成了个山脊结构。

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CNN 10 学生英语 2023年11月合集

The mission launched in October of 2021, but yesterday, Lucy reached its first target, an ancient asteroid called Dinkinesh.

该任务于2021年10月启动实施,但在昨天,“露西”号到达了它的第个目的地,那是颗名叫丁基内什的古老小星。

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诉讼双雄 第1季

It's got elevated levels of dibutoxyethanol, methane, and benzene.

亚乙基二醇二丁基 甲烷和苯的含量,严重超标。

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VOA Special 2024年7月合集

Dinkinesh is the Ethiopian name for the Lucy fossil, meaning " you are marvelous" in the Amharic language.

丁基内什”是露西化石的埃塞俄比亚名字,在阿姆哈拉语中意为“你太了不起了”。

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透视百技类

Your saliva enzymes and your stomach acid can't touch the butyl in the gum base, but that doesn't mean it just hangs out.

你身体中的唾液酶和胃酸不会接触到口香糖原料中的丁基橡胶,但这并不表示口香糖会直接被排出体外。

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VOA Special 2024年7月合集

Understanding the properties of small asteroids such as Dinkinesh and Selam helps us to have a better picture of the earliest phases of planet formation.

理解像“丁基内什”和“塞拉姆”这样的小星的特性,有助于我们更好地描绘星形成的最初阶段。

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Scishow 精选系列

But the researchers were able to make rubber self-heal by replacing the sulfur in the rubber with a pair of charged molecules, or ions, called butyl imidazolium and bromide.

但是,研究人员可以通过成对的带电分子或离子替换其中的硫磺使这些橡胶自修复,叫做丁基咪唑鎓盐和溴化物。

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Scishow 精选系列

Butyl imidazolium has a positive charge, and it's always accompanied by a negatively charged bromide, just like the ions of sodium and chloride that you find in table salt.

丁基咪唑鎓盐拥有正电荷,总是伴随着个负电荷的溴化物,就像盐粒中的钠离子和氯离子。

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开启骑之旅

They're not made out of butyl rubber and they're not made out of latex. They're actually made out of an interesting kind of plastic compound which is super super light and I think that explains a bit of the ride feel.

它们不是丁基橡胶制成的,也不是乳胶制成的。它们实际上是由种有趣的塑料复合物制成的,这种塑料复合物超级超级轻,我想这也是骑感觉的个原因。

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托福听力(TPO+真题)

Then in the 1950s, a new BIO side compound was developed, a compound called tributyl tin, or t BT p BT based paints were so effective that they were seen to be the perfect product for preventing BIO fouling.

然后在 1950 年代, 开发了种新的 BIO 侧化合物,种称为三丁基锡或 t BT p BT 基涂料的化合物非常有效, 以至于它们被视为防止 BIO 污染的完美产品。

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