查询词典 hydrogen fluoride

Primary cultured rat hepatocytes were cultured with various concentrations of sodium fluoride for 24 hours to study the toxicity and possible mechanism induced by fluoride from morphological, enzymological and biochemical changes.

收集细胞培养上清液，测定ALT和AST活性和MDA含量。用上述指标来评价氟化钠对肝细胞的毒性作用及其可能机制。

On the basis of existing international achievements in the development of methyl bromide alternatives,the author suggested that the practicability of sulfuryl fluoride,ethyl formate,propylene oxide,and carbonyl sulfide in China be approached and considered that sufuryl fluoride is most promising.

遗憾的是，它也和许多已被人类淘汰的其它熏蒸剂一样，由于它属于消耗大气臭氧层的物质[1]，为了保护人类子孙万代良好的生活环境，已经在国际上取得共识，把它列为逐步淘汰的物质[2]，而且已于1979年开始采取了具体的法规性行动[3][4]。

Polyvinylidene Fluoride is polymerized from Vinylidene Fluoride, it owns outstanding characteristics of high mechanical intensity, good radiation resistance.

聚偏氟乙烯是由偏氟乙烯聚合制得，简称PVDF。

The organoboron compounds in this paper are based on triarylboranes, boronic acids and boronic esters. The structure-property relationship and sensing mechanism are elucidated. Organoboron compounds as Lewis acid can be used as fluoride probe with high sensitivity and selectivity because they have a unique LUMO in which the π-conjugation is divergently extended through the vacant p-orbital of the boron atom. The complexation of the boron π-electron systems with fluoride ion would interrupt the π-conjugation extended through the boron atom, causing the change of photophysical properties.

介绍了基于三芳基硼化合物、硼酸和硼酸酯的有机硼化合物在氟离子检测中的应用，评述了这些化合物的结构和检测性能之间的关系，讨论了检测机理，即有机硼化合物中硼原子空的p轨道使其作为路易斯酸能够选择性地结合氟离子，硼原子与氟离子的结合破坏了硼中心与芳香取代基的p-π共轭，引起有机硼化合物光物理性质的变化，从而实现对氟离子的高选择性检测。

Methods The fluoride content in38well-water samples collected from2area s with high levels of fluoride in drinking water of Inner-Mongolia and Tianjin were detected using the FISE method and IC method.

方法以离子选择电极法和离子色谱法检测了内蒙和天津两个饮水高氟地区的38口井的井水含氟量。

The density of potassium fluotantalate and its mixed melt salt system with sodium chloride, potassium chloride, sodium fluoride and potassium fluoride are measured by Archimedes principle .

用阿基米德法测定了氟钽酸钾及其与氯化钠、氯化钾、氟化钠、氟化钾等混合熔盐体系在熔融状态下的密度，用线性回归分析方法导出了各熔盐体系的密度与温度的关系。

Oxyfluoride materials are composed of fluoride micro-crystal which is inserted into oxide glass host. Rare earth ions were priority deposited into fluoride micro-crystal, with lower phonon energy environment.

氟氧化合物由氟化物微晶镶嵌于氧化物玻璃基质中构成的，掺杂的稀土离子优先沉淀于氟化物微晶中，处于低声子能量的环境。

Results In comparison with the controls, the nuclei of many neurons were pyknotic or disappeared, the Nissl substance also showed various degrees of abnormality, and the dendrites were stretched in the high-fluoride and low-iodine groups, and in the high-fluoride plus low-iodine group, espacially in the early developmental stage.

结果 与对照组相比，高氟组和低碘组大鼠大脑皮质及海马内有较多神经元核固缩、核溶解及细胞轮廓不清晰。

Objective The aim of this study was to investigate the effect of enamel remineralization with application of calcifying solution, fluoride solution and fluoride foam.

目的 本研究对矿化液、低浓度氟化物溶液和氟泡沫再矿化作用进行了比较，从而寻找出一种再矿化效果较好的制剂。

The mechanism of fluoride was studied to provide the new knowledge on desiging related medicine to solve serious loss in sericicultural industry and protect human and other living thing from fluoride.

探索家蚕的耐氟中毒的机制，为设计相关的药物解决当前氟化物对家蚕业的破坏，以及为研究氟化物对人类及其它生物氟中毒的防御和治疗提供新的知识。

Listen,point and check your answers.

听，指出并且检查你的答案。

Warming needle is one of effective treatment methods for knee arthralgia aggravated by cold,and it is simple,safety,so it should be developed in clinical acupuncture and moxibustion extensively.

但以本院科针灸门诊在2005年1月—2006年6月期间共收治膝痛患者100余例，经过临床的诊断后，其中施以温针治疗的48例，疗效显著，报道如下。1临床资料本组病例48