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The main products of PET supercritical methanolysis are dimethyl terephthalate(DMT) and ethylene glycol(EG).

红外光谱检测解聚产物是很高的对苯二甲酸二甲酯(DMT)单体和乙二醇。

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The students are asked to prove the purity of copper.

要求学生们检验铜的

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Results Pure flavonol and flavanonol were obtained by the column chromatography of polyamide.

结果运用聚酰胺柱色谱法一次分离得高黄酮醇与二氢黄酮醇。

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The silver vase had been hallmarked at Birmingham.

这个银瓶是在伯明翰打上标记的。

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The 2,6 dipicrylamino 3,5 dinitro pyridine(PYX)pureness reference material had been certificated by potentiometric method.

用电位滴定法对2,6-双(苦氨基)-3,5-二硝基吡啶(PYX)标准物质的进行测定。

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The indium sesquioxide with over 99% purity can be prepared by a decomposition of nitric acid. The method was characterized by fewer equipments, simple operation, low cost and quick yield.

采用硝酸分解法可高于99%的三氧化二铟.本法具有设备少、操作简单、成本低、见效快等优点.

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Because the mature tissue of velvetleaf contains lots of secondary metabolites such as alkaloid and phenolic, it is difficult to obtain high purity DNA from mature tissue of velvetleaf.

摘要青成熟组织中酚类、黄酮类等次生代谢物较多,要从中提出高的DNA比较困难。

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The Spanish Cross in Bronze was die struck in tombak or bronzed brass and the Silver can be found both in hallmarked 800 grade silver and silver plated brass.

西十字勋章是铜与锌的合金或被镀青铜的黄铜和银在青铜模子.造,能发现品质800的银,并且银上镀了黄铜。

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Medene collagen crystal eye angel mask have the character of breathing freely, keeping wet, well-merged with the biology, its potential involucra structure can deposited many more special substances.

美丹妮眼护天使采用高胶原蛋白配而成,是目前国际上高档化妆品推崇的新兴美容科技成果。

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It is a convenient method to acquire a great number of highly purified Schwann cells by enzymolysis ,and fibroblastic cells were removed by using cytosine arabinoside .

酶消化法培养SC方法简便,可去除大部分成纤维细胞(FB),再用Ara-c化SC,获得的SC数量多,高。

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Conclusion:The purified fusion protein has good fineness and hemolysis activity, the antibody titers initiated by the protein vaccine go with regulation and the immunoprotection is satisfied.

化的目的蛋白达到电泳级,且依然保持良好的黏附活性,蛋白疫苗作用机体产生的抗体水平符合抗体消长规律。

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They are the silent spectators of prakrti (matter or nature), which is composed of three gunas (dispositions): satva, rajas and tamas (steadiness, activity and dullness).

它们是帕克提(物质或自然)的无声观众,是由三重的根拿斯(部署)组成:萨特瓦,拉杰斯和塔玛斯(坚定性,活跃性和)。

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Etodolac was synthesized with 7-ethyltryptophol and methyl 3-oxopentanoate as the starting materials.Highly pure etodolac was obtained by purifying the crude product with a mixing solvent.

以7-乙基色醇和3-氧代戊酸甲酯为起始原料,以甲醇为溶剂,合成了依托度酸.采用混合溶剂对粗品进行精,得到了高的依托度酸.

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The improvement of the purity of fluorene is not dependent on the removal of acenaphthene and dibenzofuran, but dependent on the separation of other impurities.

的提高主要不是依赖苊、氧芴的去除,而是其它杂质的分离。

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Through the simple method of CTAB, total DNA of velvetleaf was extracted from sprouts of velvetleaf in which there was a little secondary metabolites.

本研究利用黄酮等次生代谢物未大量合成的青幼芽为材料,采用简化CTAB法提总DNA,可以获得高、高产量的DNA。

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Recent method of synthesizing 3,5-xylenol is sulpho alkaline fusion of dimethylbenzene,it is a very complicated procedure with serious pollution and low-pure products.

国内目前生产工艺是间二甲苯的磺化碱熔法,该方法工艺过程复杂、污染严重,并且产品不高。

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The results showed that the purity of Zincite as product was more than 99.6%in according with the requirements of grade A products.

试验结果表明,其产品氧化锌可达99.6%以上,符合一级品的要求。

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The mixture was refined by sodium sulfide and sodium hydroxide to afford an O,O-diethyl thiophosphoryl chloride at a purity of 99%.

该粗品通过精工艺的改进,采用硫化钠和氢氧化钠的混合物进行处理,得到≥99%的O,O-二乙基硫代磷酰氯。

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Heptanone with purity being 98.5% was synthesized by ethyl acetoacetate.The yield is 58.9%,and its application in the related fields were discussed.

用乙酰乙酸乙酯法合成了2-庚酮,总得率为58.9%,为98.5%.介绍了2-庚酮在相关领域中的应用.

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Therefore,it is important to control strictly reaction conditions for removing cystine's mesoisomer and making L-cystine of high optical purity.

严格控反应条件,分离除去内消旋胱氨酸是高光学L-胱氨酸的重要措施。

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Wetlands are important for improving the purity of the water too.

湿地对于提高水也很重要。

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《这个杀手不太冷》原声版

In June, we gave you the dope, it tests 100 percent pure.

六月份我们把毒品给你时候,还是百分之百。

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6 Minute English 六分钟英语

They may have had years of training to learn about the different types of wine and the individual flavours or aromas, known as notes.

他们可能已经接受了多年培训,以了解不同类型葡萄酒以及们各自味道或香味,也被称为

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华尔街日报

The traditional marketing strategy for bottled water as a premium product was all about purity.

传统瓶装水作为高端产品营销策略全于“”。

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NPR音讯 2019年7月合集

The uranium is only enriched to about 3.5%. It cannot be used for a bomb.

浓缩铀只有3.5%左右。这一不能用来制造炸弹。

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Scishow 精选系列

A hunk of pure iron, for example, doesn't tend to stay pure for very long.

例如,一大块铁不能长时间保持

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科学60秒-科学美国人 2023年1月合集

Bottled water companies often brag about the purity of their drinks.

瓶装水公司通常会夸耀自家水

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VOA Special 2023年12月合集

And they discussed the mineral content and purity.

他们讨论了矿含量和

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VOA Special 2024年6月合集

The purity must be high if it is to be used to carry electricity.

如果要用来导电,必须高。

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昆虫王国第二季 (原声版)

This technique guarantees the purity of the silk.

这种技术能保证丝

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跟马修学英语

Butter was declared public enemy number one, in the 1950s, by heart doctors, as well as fitness fanatics, because this pure, unadulterated source of saturated fat was going to lead us all to an early grave.

二十世纪五十年代,黄油是心脏病医生和健身狂人公认人类公敌,因为黄油有极高饱和脂肪,这会减少我们寿命。

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心理学小课堂

Their fixation is with the quality and purity of their food to the point of cutting out food groups, like sugar, carbohydrates and meat, because they aren't pure enough.

他们注意力集中质量和上,以至于不吃糖、碳水化合和肉类,因为们不够净。

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宇宙奇迹

This is about 85% pure gold, but it could also be found like this, and this is a gold nugget that was found in a river, on a river bed, and it's a heavy piece of gold.

这是为 85% 金矿石,有时还可能是以这种形式出土,这是河里发现一块天然金块,河床上找到,很大一块金子。

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经济学人(汇总)

Jewellery is weighed, then scratched on a small square stone. Acid and salt are applied to the scratch, to test purity; 5 to 10% of items fail.

先给珠宝称重,然后一块小型方形石头上划过,这一步骤中需要用到酸和盐,以检测黄金;5到10%品没能通过检测。

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经济学人-科技

In addition, though, it is doped with powdered quartz (the pure stuff, rather than the tainted variety that makes up most sand) and various reinforcing metals and fibres.

但UHPC中还配有石英砂及各种加固材料和纤维。这种石英砂不同于其他大量混有 沙子石英砂,高达100%。

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VOA常速英语_中东

The UN's nuclear watchdog, the International Atomic Energy Agency said in its August report, that Iran was continuing to enrich uranium up to 60% Purity short of 90% weapons grade fuel.

联合国核监督机构国际原子能机构8月份报告中说,伊朗继续进行高达60%铀浓缩,低于90%武器级燃料。

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VOA Daily Standard 2023年9月合集

The report by the International Atomic Energy Agency says Iran has 121.6 kilograms, or 268 pounds, of uranium enriched up to 60 percent, a far slower growth than in previous counts.

国际原子能机构这份报告说,伊朗拥有121.6公斤(268磅)为60%浓缩铀,这一增长速远远低于之前统计。

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纽约时报 (New York Times)

A clerk took the small pile and began testing it, filing away at the pieces and putting them under a special X-ray-like machine to test their purity.

一名店员拿走那一小堆金子,开始检测,他锉下一些碎屑,放入一台类似X光特殊机器检验

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BBC 听力 2014年9月合集

In Canada, the mayor of Toronto Rob Ford who made global headlines for confessing his addiction to crack cocaine has dropped out of the race of re-election.

加拿大,因承认对高可卡因上瘾而登上全球新闻头条多伦多市长罗伯·福特(Rob Ford)退出连任竞选。

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VOA Special 2022年8月合集

Materials from the mine will be sent to Estonia, which has one of only two plants outside China that processes rare earths to a high degree.

该矿原料将被运往爱沙尼亚。爱沙尼亚是除中国之外拥有高稀土加工厂国家之一。

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