季铵化合物

Efficient conversion of pentaerythrite with carbonyl compounds,aldehyde or ketone,to the corresponding pentaerythritol dialdehyde or diketone compounds in the presence of ammonium hydrogen sulfate under microwave irradiation without solvent was described.

无溶剂微波照射下，通过硫酸氢铵催化季戊四醇和醛、酮反应合成了季戊四醇双缩醛、酮化合物。通过IR和1HNMR对产物结构进行了表征，研究了反应条件对产率的影响，最佳反应条件为微波照射功率750 W，照射时间1.5 min

ACQ-DB is a water-based wood preservative that contains copper and Quaternary Ammonium Salts and boron-containing compounds.

ACQ-DB 是一种水溶性木材防腐剂，其主要活性成分包含铜、季铵盐、硼化合物。

The results show that with the content of the synthetic compound increasing, the surface resistivity of PVC materials was decreased.

合成了一种长链季铵盐类化合物，将其用作抗静电剂添加到软质聚氯乙烯材料中，测试了材料的表面电阻、力学性能，并采用扫描电子显微镜测试研究了其结构。

A quaternary ammonium salt compound with a long chain of 12 carbon atoms was synthesized and used as an antistatic agent to be added into plasticized poly, and the structure and properties of such PVC materials were studied by surface resistivity, mechanical property and scanning electronic microscope tests.

合成了一种长链季铵盐类化合物，将其用作抗静电剂添加到软质聚氯乙烯材料中，测试了材料的表面电阻、力学性能，并采用扫描电子显微镜测试研究了其结构。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。