氟化物

Tieguanyin fluoride in about 40% to 80% dissolved in water, with the teeth vulnerable to a combination of calcium, in the teeth formed on the surface of a layer of calcium fluoride, anti-acid plays the role of anti-caries.

铁观音中的氟化物约有40%～80%溶解于开水，极易与牙齿中的钙质相结合，在牙齿表面形成一层氟化钙，起到防酸抗龋的作用。

The thermal stability and structure of tungsten-tellurite glass were determined by means of differential scanning calorimeter and Raman spectra.

尤其是，在1 600nm波长附近，Er3+离子在碲化物玻璃中的受激发射截面是氟化物和石英玻璃的2倍[1，2]。

Fluoride as a type of very important chemical compound, plays an extremely crucial role in the peoples life.

氟化物作为一类重要的化合物，在人们的日常生活中占据极其重要的地位。

Even tap water invariably contains a variety of poisons such as chlorine, chloramine, asbestos, pesticides, fluoride, copper, mercury, and lead.

就是自来水也必定含有各种有害物质，如氯、氯胺、石棉、杀虫剂、氟化物、铜、铅等。

Methods The contents of fluorides in water in and around a large size chemical factory were under monitoring. 545 workers and children living in polluted area and 75 villagers living around as control were selected to be measured such indexes as chronic pharyngitis and coryza, urine fluorine, dental fluorosis, secretory immunoglobulin A and the alkaline resistance of skin.

对某大型化工厂厂区及周围水的氟化物含量进行监测，对氟污染区工人和儿童5 45人及周边村民对照组75人进行上呼吸道慢性炎症、尿氟、氟斑釉、SIgA、皮肤碱抗力的调查。

Cryolite, natural and artificial; Conventional test for evaluation of free fluorides content

天然和人造冰晶石。计算游离氟化物含量的常规试验法

Objective To evaluate the most effective method of fluoride application to prevent decalcification of enamel before,during and after etching in orthodontic treatment.

目的探讨氟化物在正畸治疗中预防牙釉质脱矿的最佳使用方法。方法制备正畸拔除的前磨牙96颗，随机分成4组，分别为对照组及酸蚀前、中、后用氟组，粘结托槽后，将每个样本分别放入装有2ml酸性人工唾液的试管。

Objective To find a simple and effective way to prevent enamel decalcification by guiding patients wearing fixed appliance to use fluoride mouth rinse.

目的 通过指导接受固定矫治器治疗的患者使用含氟漱口液，以期找到一种简便有效的方法来防治牙釉质脱矿，从而应用氟化物防治固定正畸治疗中的牙釉质脱矿。

Fluoride toothpaste can effectively prevent enamel decalcification in fixed-orthodontic treatment.

在正畸治疗中配合使用氟化物处理牙面，可预防牙釉质脱矿的发生。

The paper discloses a process for diazotization fluorination of aromatic primary amines utilizing sodium nitrite and anhydrous hydrofluoride to produce the corresponding diazonium fluoride which is decomposed, usually by heat, to make the desired fluoroaromatics .

本文通过重氮化工艺路线的改进，在液态氟化氢中进行重氮化和重氮盐的热分解，提高了芳香族氟化物的收率，并且使重氮化反应工艺能应用于工业化生产。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。