氧

Methoxystilbene and 2-methoxy-4'-nitrostilbene were synthesized from benzyl chloride and nitrobenzyl chloride by the Wittig reaction, and used as intermediates for the synthesis of the final product fluorescent whitener FP4,4'-bis(2-methoxystyrylbiphenyl via reduction and diazotisation of the latter followed by reaction with the former in the presence of NaOH.

以氯化苄和对硝基氯苄为原料，经Wittig反应合成中间体：2-甲氧基-二苯乙烯和2-甲氧基-4'-硝基-二苯乙烯。后者经还原反应、重氮化反应后，在氢氧化钠存在下与前者反应生成最终产品荧光增白剂FP4，4'-双-2-(甲氧基苯乙烯基联苯。为该类荧光增白剂的合成开辟了一条新路线

Most of the dyes tested can be degraded anaerobically in varying degrees, except 2 xanthene dyes, C. I. Mordant Red 15 and C. I. Acid Red 52, the former is even toxic to anaerobic process.

3大多数被试染料在厌氧条件下都具有不同程度的可降解性，只有2种结构为氧杂蒽的染料，酸性媒介桃红3BM和酸性玫瑰红B，是难降解的，前者对厌氧消化过程还具有毒性。

The cell EMFs of oxygen in an evacuated system (105 ~103Pa) versus atmospheric oxygen were measured from 600℃ to 800℃ by an oxygen concentration cell with a solid electrolyte of yttria stabilized zirconia.

应用Y2O3稳定ZrO2氧浓差电池，在600～800℃测定了抽气系统（0.1～10－3MPa）中氧对大气氧的浓差电动势。

In terms of above problem,an explosioninsulated zirconium oxide content analyzer is developed,which supplies a systematic solution to the oxide measurement at dangerous petrochemical site.

针对上述问题，研发了一种全隔爆型氧化锆氧含量分析仪，适用于爆炸性环境条件下各种工业锅炉和加热炉排放气体中氧含量的测量，为石油石化等危险场所的氧含量测量提供了一体化的解决方案。

Neuroglobin, a recently identified monomer globin in nerve system, is highly affinitive with oxygen similar to myoglobin. After the coding region of rat NGB gene was sub cloned into the prokaryotic expression vector pGEX 4T 2, the recombinant vector was introduced into E. coli BL21 (DE3) cells for efficient expression.

氧是人类及许多生物赖以生存的重要条件，严重缺氧和低氧可危及人体生命。2 0 0 0年 9月，德国Burmester等人首次报道了人和小鼠脑内存在特异的功能上类似于肌红蛋白的携氧蛋白———脑红蛋白(neuroglobin ，NGB) [1 ] 。

The synthesis and characterization of asymmetric dinuclear and mononuclear vanadium complexes show that the pH value is very important for the products\' formation and isolation. In some pH range, theα-alkoxy bridge was easy to break and form asymmetric dinuclear and mononuclear vanadium structure.

三、不对称的双核钒和单核钒配合物的合成和表征显示，pH值对产物的形成和分离具有至关重要的作用。pH值在一定范围内，柠檬酸的烷氧基氧作为桥氧的化学键才容易断开，从而形成不对称的双核钒和单核钒结构。pH值不仅影响不对称双核V_2O_3钒配合物和单核钒配合物的形成，还关系到钒还原的速度。

Analysis based on the experimental results demonstrated the plausible reaction mechanism is that vit C first converts Cu(superscript 2+) to its reduced state and vit C becomes vit C radical itself, thereby stimulating the formation of peroxyl and alkoxyl radicals, and bimolecular reaction of peroxyl radicals results in (superscript 1)O2 production in the systems studied.

根据实验观察的结果，分析了这一体系中(上标 1)O2形成的可能途迳，认为首先是维生素C将Cu(上标 2+)转变为还原态，而自身失去一个电子转变为维生素C自由基，从而刺激了过氧自由基和烷氧自由基的形成，过氧自由基的双分子反应很可能就是体系内(上标 1)O2产生的反应机制。

The alkoxyl group at 2-position is affected by the steric repulsion due to the two methyl groups at 1, 3-position, which causes the oxygen atom of alkoxyl group to deviate from the aromatic ring plane, hence, the conjugation effect of the oxygen atom with aromatic ring decreases

对于IV〓、IV〓，其1，3-位两个甲基对2-位烷氧基产生空间排斥作用，使2-烷氧基氧原子偏离芳环平面，烷氧基对芳环的助色作用受到削弱。

Most of thesete1lurites and tellurates in these deposits are found to be products of coeval oxidationof calaverite, altaite and sufides, by Which "refractory gold" of Au tellurides will bereleased as naive gold. Most native gold released through oxidation of tellurides,however, will be trapped in the telluraes or tellurites; or be combined by Te intellurites or tellurates, which prevent gold of hyPergene from secondaxy enrichmentunder the supergene oxidation environrnenis.

研究表明，这些碲含氧盐大多数为碲金矿、碲铅矿与硫化物共同氧化的产物，&难溶金&矿物在氧化条件下发生分解，一般释放出自然金；由于金要么以自然金形式被&捕获&于这些含氧盐，要么重新与碲形成Au－Te含氧盐，所以抑制了金的次生富集。

Jiangsu Anpon Electrical Chemistry Co., Ltd., Huaian 223002, Jiangsu, China Abstract: 2-Amino-4,6-dimethoxy-1,3,5-triazine, an important intermediate for preparing cinosulfuron, was synthesized utilizing 2,4,6-trichloro-1,3,5-triazine as raw material via ammonization, methoxylation. The purity was 96.0% and the average yield was 90.4%.

江苏安邦电化有限公司，江苏淮安 223002 摘要：2-氨基-4，6-二甲氧基-1，3，5-三嗪是合成醚磺隆的重要中间体，以三聚氯氰为起始原料，经氨化、甲氧基化中试反应得到2-氨基-4，6-二甲氧基-1，3，5-三嗪，纯度为96.0%，平均收率90.4%。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。