查询词典 fluoride

This article has summed up the current researches on separating quartz from feldspar through flotation with no-fluoride, and analyzed the mechanism that causes the differences of floatability between quartz and feldspar in these several processes.

对国内外石英—长石无氟浮选分离的现行工艺进行了系统总结，并对在这几种工艺条件下导致两种矿物可浮性产生差异的内在机理做了具体分析。

After the fluoride into the tooth germ, it is in the developmental stage with the enamel crystals react fluorapatite began to replace the hydroxyapatite.

进入后牙胚氟，它在牙釉质晶体的发展阶段，是氟磷灰石反应开始取代羟基磷灰石。

Fluorapatite is a crystal that contains fluoride, tooth enamel than in the general composition of hydroxyapatite crystals have a stronger corrosion resistance.

含氟是晶体，其中包含比一般的羟基磷灰石晶体组成的氟化物，牙齿珐琅质具有较强的耐腐蚀性。

Fluoride to prevent cavities there are several ways: to hydroxyapatite into fluorapatite difficult to dissolve and reduce enamel in acid in the soluble; to a direct impact on dental plaque and reducing plaque organisms secrete acid capacity; accelerated by acidic substances are due to decalcification of the tooth enamel erosion and mineral parts of recharging it.

氟化物以防止蛀牙，有几种方法：对羟基磷灰石成难溶于和减少酸，可溶性搪瓷；在对牙菌斑产生直接影响，减少牙菌斑生物分泌酸能力；的酸性物质加速是由于脱钙的牙齿釉质侵蚀，它的充电矿产部分。

fluoride pollution ; fluoric wastewater treatment ; lime-sedimentation ; coagulation sedimentation

石灰沉淀与混凝沉淀组合法具体工艺流程如图1。图1 试验工艺流程试验中用的主要仪器是：JJ-4

The big issues is the forever cumulative chronic toxicity of fluoride just like lead and arsenic both of which are in the toxic waste used for fluoridation.

大问题是永远累积的慢性毒性氟化物就像铅和砷这两者都是在有毒废物用作氟化物。

ScF3-MX molten salt was made from scandium oxide and ammonium hydrogen fluoride by solid state fluoridation under heating and melting.

研究制定了ScF_3-MX熔盐Al熔体中Mg热还原制备Al-Mg-Sc中间合金中南大学博士学位论文摘要的新工艺。

This paper reviewed the relationship between fluoridated milk and dental caries prevention derived from the preceding academic research. Several topics, including milk fluoridation, fluoridated milk in animal and human clinical studies, the effect of fluoridated milk to fluoride concentration in saliva and dental plaque, the bioavailability of fluoridated milk, and the effect on human teeth were discussed.

本文回顾有关牛奶与龋齿间关系以及牛奶氟化以预防龋齿的文献，从牛奶氟化的最初想法，到氟化牛奶的动物实验、人类临床实验，进一步研究对唾液、牙菌斑中含氟量的影响，以及氟化牛奶的生物可得性，最后探讨对人类牙齿的抗酸溶解力的改变。

Fluorine is one of crucial chemical elements to human health and can be tested in almost every parts of a healthy human body. Overloading of fluorine may cause dental and/or skeletal fluorosis, while in fluorine deficiency areas, fluoride drinking water supply or other methods of fluoridation may greatly reduce the ratio of dental caries of local residents. Researches on relation between fluorine concentration in drinking water and the ratio of human dental caries as well as the evaluation on efficacy of drinking water fluoridation have been lasted for 6 decades.

中文题名中国部分城市和地区居民饮用水氟含量与口腔健康相关性研究副题名外文题名 A research on relation between fluorine concentration in drinking water and residents' dental health of some cities and areas in China 论文作者王滨滨导师郑宝山学科专业地球化学研究领域\研究方向学位级别博士学位授予单位中国科学院地球化学研究所学位授予日期2003 论文页码总数103页关键词饮用水口腔健康氟中毒龋病饮用水馆藏号BSLW /2003 /R123 /3 氟是人体必需的微量元素之一，正常人体各组织和器官都含有氟。

Objective : To study the effect of fluoride on osteoblasts.

目的：探讨氟对成骨细胞的影响。

Cable dampener cannot be rolled up but must be hung over the cable.

缆帆不能被卷起，必须保证处于展开状态

"This skylark is a present from my master," he says.

"这只云雀是我主人献上的礼物。"他说。