臭氧的

We have used GC to follow up the formation of epoxy acid and established the acidify condition; we have done series of parallel experiments to better the pivotal condensation reaction between acid and amine; In the cyclization step, we use cheap and available reagent-Lithium amide , rather than expensive LiHMDS, to proceed the reaction; and at last, we introduced green reagent-ozone to clear the phenyl group of nitrogen to avoid using heavy metal reagent-CAN. The total yield for this method is 29.8%.

通过GC监测，确定环氧酸的最佳酸化条件；对关键的酸和胺的缩合步骤，平行试验了多种条件；在环合一步，用价廉易得的氨基锂及催化量的HMDS代替昂贵的LiHMDS进行反应；氮上苯基的脱除采用臭氧，避免了重金属试剂-硝酸铈铵的使用，总收率为29.8％。

In general, however, critics agree with Ainsworth's conclusion that new varieties of rice, bred to tolerate high ozone and increased temperatures, are urgently needed.

尽管如此，在总体上，批评家门还是赞成安斯沃思的结论的。那就是，培育能够抵抗高浓度的臭氧和高温的新型而又多样的大米是目前迫切的需要。

Similar low ozone amounts over the Antarctic continent have been observed by a TOMS instrument on a National Oceanic and Atmospheric Administration satellite, as well as by balloon-borne instruments flown from the South Pole and ground-based spectrometers.

另外，位于美国国家海洋气候管理局的卫星上的'TOMS'仪器，以及从南极放飞的由气球携带的仪器还有陆上的分光计，都已得到相似的数据表明，南极洲臭氧含量过低。

The free hydroxyl radical of greater activity produced in the catalytic ozonization of V is the essence of the catalytic system; and the formed V also contributed greatly to the removal of chemical oxygen demand.

结果表明，催化体系的本质是催化剂中的四价钒催化臭氧分解生成了活性更高的羟基自由基，所生成的五价钒对体系化学耗氧量的去除也有很大的贡献（近10%）。

Results showed that advanced oxidation technique of ozonization has a good effect on removal of acid red B. After 30 min reaction with pH=7, up to 99.5% of color decay was obtained and chemical oxygen demand was 37.9%. If initial pH of the wastewater was increased to 11, the removal rate of COD was optimum.

结果 在pH=7的条件下，单一臭氧氧化30 min时，废水的色度和COD去除率分别为99.5%和37.9%；而废水的初始pH值控制在11左右时，COD去除率有较大提高。O3/H2O2氧化工艺，适宜的H2O2和O3物质的量比为0.6，氧化处理30 min废水的COD去除率可达53.5%。

During the manufacturing of the critical intermediate cephalosporin nucleus --7-amino-3-chloro-cephalosporanic acid diphenylmethyl ester hydrochloride salt, first the feasibility of the one-pot synthetic route of open loop, closed loop and ozonization when chlorine is passed over is qualified by experiments. Then the critical factors that will influence this reaction are studied as follows: the mol ratio of triphenyl phosphite and Diphenylmethyl 3-hydroxy-7-phenylacetaminoceph-3-em-4-carboxylate-l-oxide is four to one; the quantity of the stablizer should be at least more than two to one. The temperature of the system must be 25℃ when chlorine is passed over so that the hydrochloride can be precipitated to obtain cephalosporin nucleus of cefaclor--7-amino-3-chloro-cephalosporanic acid diphenylmethyl ester hydrochloride salt.

在制备关键中间体头孢母核7-氨基-3-氯头孢烷酸二苯甲酯盐酸盐时，先通过实验验证把开环、闭环、臭氧化三步在通入氯气时并为一锅煮的合成路线的可行性之外，又研究了影响该反应的几个重要因素：亚磷酸三苯酯与3-羟基-7-头孢烷-5-亚砜-2-甲酸二苯甲酯的摩尔比为4：1；稳定剂2-甲基-2-丁烯的用量至少大于2：1，通入氯化氢气体时体系温度在25℃时盐酸盐则能够顺利析出，获得头孢克洛的头孢母核—7-氨基-3-氯头孢烷酸二苯甲酯盐酸盐。

On elementary theory of non-thermal plasma, the mechanism of VOCs destruction was decided: under the action of activated particles (such as high-energy electrons, ozone, radicals, etc) produced by discharge reaction, a series of physical and chemical reaction will take place, the result is that harmful VOCs is decomposed into unharmful substance.

根据电晕放电等离子体的基本理论，得出了等离子体处理VOCs的机制：在放电产生的活性粒子(如高能电子、臭氧、自由基等)的作用下，发生一系列的物理化学反应，使有害的VOCs转化成无害的物质。

Be in from the ground in the atmosphere advection layer of 50 kilometers of 15 ～, centered the ozone gas of on the earth 90%, although its chroma never exceeds 1/100000, all concentration rises to also have a even thinner than sole only, but it assimilated opposite substance effectively harmful, wavelengh is less than the UV-C of sun ultraviolet ray of 295nm, and opposite content hurtless, wavelengh is more than the UV-A of sun ultraviolet ray of 320nm to make them all pass however, opposite content has certain harm, wavelengh is in the UV-B of sun ultraviolet ray of 295 ～ 320nm also is absorbed for the most part.

在离地面15～50公里的大气平流层中，集中了地球上90%的臭氧气体，虽然其浓度从未超过十万分之一，全部集中起来也只有比鞋底还要薄的一层，但它却有效地吸收了对生物有害的，波长小于295nm 的太阳紫外线 UV-C，而对生物无害的，波长大于320nm 的太阳紫外线 UV-A 却让它们全部通过，对生物有一定危害，波长在295～320nm 的太阳紫外线 UV-B 大部分也被吸收。

According to The Montreal Protocol on Substances that Deplete the Ozone Layer, Halons that are used widely for fire control are controlled gradually. It is very urgent to find safe extinguishing reagents replacing Halons.

由于《关于破坏臭氧物质的蒙特利尔协定书》，一直作为消防灭火的主力军的哈龙灭火剂逐步被禁用，寻找一种新安全可靠的灭火剂成为世界各国的迫切要求。

The dry atmosphere consists almost entirely of nitrogen (78.1% volume mixing ratio) and oxygen (20.9% volume mixing ratio), together with a number of trace gases, such as argon (0.93% volume mixing ratio), helium, and radiatively active greenhouse gases such as carbon dioxide (0.035% volume mixing ratio), and ozone.

干大气几乎完全由氮（78.1%的体积混合比）和氧（20.9%的体积混合比）构成，还包括一些微量气体，如氩（0.93%的体积混合比）、氦，以及对辐射起作用的温室气体如二氧化碳（0.035%的体积混合比）和臭氧。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。