和硫

Methods 4-Hydroxy- benzonitrile was treated with sodium hydrogen sulfide and anhydrous magnesium chloride in dimethyl formamide to give thioamide, which was then directly cyclized with ethyl 2-chloroacetoacetate without separation to give ethyl 2-(4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(2) in one-pot; then 2 was formylated with Duff reaction adopting hexamethylenetetramine in trifluoroacetic acid to give ethyl 2-(3-formyl-4-hydroxyphenyl)-4-methylthiazole-5-carboxylate(3); finally, the target compound was obtained by the treatment of 3 with hydroxylamine hydrochloride and sodium formate in formic acid.

采用"一勺烩"方法，以4-羟基苯甲腈为起始原料，首先与硫氢化钠和无水氯化镁在N，N-二甲基甲酰胺中反应，所得中间体不经分离，直接加入2-氯乙酰乙酸乙酯进行环合反应，得到2-(4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯（2）；然后通过六亚甲基四胺/三氟乙酸进行Duff反应，得到2-(3-甲酰基-4-羟基)苯基-4-甲基-5-噻唑甲酸乙酯（3）；再经盐酸羟胺/甲酸/甲酸钠体系脱水得到目标化合物。

Mo isotopic signatures in sediments can be used as an indicator for redox conditions of paleo-environment and corresponding paleo-oceanography. Therefore, molybdenum isotopes can be used as a powerful tool for understanding the redox conditions of local or regional depositional environment, the biogeochemical cycle of sulfur or carbon, and the geochemical evolution of ancient oceans.

沉积物中的Mo同位素既能指示古沉积环境的氧化还原条件，也能够指示与之相关的古海洋地理环境，因此，Mo同位素是了解局域至区域沉积环境的氧化还原条件、硫和碳地球化学循环及古海洋化学演化等的强有力工具。

Molybdenine in the ore is of 2H_1 type andRe content is low Bismuthinite is the most abundant bismuth minera...

辉铋矿是所有含铋矿物中最大量的矿物，而自然铋、辉铅铋矿、斜方辉铅铋矿、针硫铋铅矿和辉碲铋矿则很少量。

Bismuth minerals and their relationship with gold mineralization are studied by means of reflect light microscope and electron probe microscope.The results show that bismuth, bismuthinite are main bismuth minerals in the two mines.

矿相学鉴定和电子探针分析结果表明，两矿床中的铋矿物以自然铋、辉铋矿为主，其次为碲铋矿、硫铜铋矿、辉铋铅矿等；铋矿物作为主要载金矿物，与自然金紧密共生；包村矿区Bi-Au相关系数为0.69，铋矿物与金矿化关系非常密切。

The synthesis of gold and platinum nanoparticles by the reduction of their salts with potassium bitartrate as the reductant and poly (N-vinyl-2-pyrrolidone) or 3. 3-thiodipropionic acid as the capping agent has been studied.

对以聚和3，3—硫代二丙酸为覆盖试剂通过酒石酸氢钾还原相应的金属盐制备金、铂纳米粒子作了研究。

The small band gap and the large Bohr radius of lead chalcogenides enable unique optical, electrical, and chemical properties, presenting this family of materials as a good candidate for potential applications in solar cells, thermoelectric devices, telecommunication, field effect transistors and biological imaging.

IV-VI族铅的硫属化合物半导体纳米材料，由于他们较小的能带间隙和较大的激子波尔半径，这类材料在太阳能电池，热电器件，电子通信，场效应晶体管，生物成像技术上有很广泛的潜在应用价值。

Against the summer to prevent worms in poorly ventilated environment prone to scale insects, 5% Bordeaux mixture to prevent, or 1% and 25% omethoate EC Phosmet 1000 times for spraying.

防止病虫危害夏天，在通风不良的环境下容易发生介壳虫，用5％波尔多液预防，或用1％氧化乐果和25％亚胺硫磷乳油1000倍液进行喷洒。

These cities have been found - and yes, they were burned by sulfur and brimstone, near the edge of the Dead Sea, just like God said.

这些城市已经发现，他们是被焚毁的硫和硫磺、死海附近的边缘，就像上帝说。

A new process,urea- calcium cyanamide method,for producing thiourea from urea and hydrogen sulfide is proposed.

利用尿素和硫化氢等原料制备硫脲，提出了尿素-氰氨化钙法新工艺。

In the chapter four,the main study was focused on [60,70]fullerene reaction with 4,4,5,5-tetramethylidazoline- 2- thione and DL- valine and other α-aminoacids. The results ofcharacterization showed that it was a carbene reaction. The possible mechanism wasput forward based on the results of characterization.

第四章，主要研究了[60，70]富勒烯，4，4，5，5-四甲基咪唑啉-2-硫酮与DL-缬氨酸和其它氨基酸的反应，通过对反应产物的详细的表征，发现该类反应是一个产生卡宾的新反应。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。