The fourth is cyclic compounds (naphthalene).

第四为稠环化合物（萘）；

In fact, camphor and naphthalene balls are different in nature.

事实上，樟脑和臭丸在性质上是不同的。

So here I would like to talk about camphor and naphthalene ball.

所以在这里，我想谈论一下樟脑和臭丸。

Naphthalene is an important raw material for the chemical industry.

精萘是最重要的有机化工原料。

Phthalic anhydride residue is the by product from oxidation of naphthalene oro xylene.

苯酐渣系萘氧化或邻二甲苯氧化的副产物。

The thermal characteristics of the Naphthalene heat pipe were studied with experimental method.

应用实验的方法，研究了萘热管的热工特性。

The research and development of some hot point products derived from naphthalene are introduced.

介绍了近年来一些热点萘系深加工产品的研究、开发及生产。

The p dichlorobenzene and naphthalene in mothproofing agent was determined by infrared spectroscopy.

用红外光谱法测定了防蛀剂中对二氯苯和萘的含量。

Still, it was an intriguing case and diagnosis (and it's true that some termites do secrete naphthalene).

不过这次的诊断还算有趣。

Study on Synthesis, Structure and Reaction ofa New Compound 2, 3 - Methylene - 5, 8 - Dimethoxy Naphthalene.

新化合物2,3—亚甲基—5,8—二甲氧基萘的合成、结构及反应的研究。

It consists of alkyl aryl sulfonate and formaldehyde naphthalene sulfonate condensate synthesized chemically.

它是由化学合成的烷基芳香族磺酸盐和萘磺酸盐甲醛缩合物所组成。

In heat transfer experiment, the calorie comparison theory and naphthalene sublimation technology are adopted.

在传热实验中，采用了热质比拟原理及萘升华技术。

The process of alkyl naphthalene preparation by alkylation, acylation and direct extraction are also discussed.

讨论了烷基化、 酰基化和直接提取制备烷基萘的工艺路线。

Sodium din-butyl naphthalene sulfonate was prepared from n-butyl alcohol, naphthalene and fuming sulfuric acid.

本文提供二正丁基萘磺酸钠及二异戊基萘磺酸钠之制备方法。

The effects of 1,2,4-trichlorobenzene and naphthalene on photosynthetic characteristics of rice leaves were studied.

研究了1，2，4-三氯苯和萘对抽穗期水稻叶片光合特性的影响。

These results indicated that degradative and transposable genes of the naphthalene-degrading bacteria are highly conserved.

这些结果表明，萘降解细菌的降解基因和转座基因具有高度的保守性。

The derivates of naphthalene, fluorene, pyrene, anthracene, acenaphthene and their application in biotechnology were reviewed.

对应用于生物工程的萘、芴、芘、蒽、苊等稠环芳烃衍生物作了概括介绍。

The influence of solid superacid preparation on its properties and naphthalene oligomerization was investigated in this paper.

研究了固体超强酸催化剂制备条件对催化剂性质及萘齐聚反应的影响。

Being aimed at solid liquid equilibria in the system naphthalene thianaphthene, Pure naphthalene whose purity is more than 99.

针对萘-硫茚系统的固液平衡，采用溶剂精馏可得到纯度＞99。

Compared with the photoreaction in distilled water, the ions in artificial seawater could enhance the photolysis of naphthalene.

同蒸馏水中的光反应相比，人工海水中的离子有助于提高萘的光解反应。

Therefore , using camphor is safer than using naphthalene balls . but of course , camphor is more expansive than naphthalene balls.

因此，使用樟脑比使用臭丸更为安全。但价钱方面，樟脑比臭丸较贵。

With the method of enrichment culture, a high efficient naphthalene-degrading strain, ND24, was isolated from petroleum wastewater.

用富集培养法从石油工业废水中分离到高效降解萘的ND24菌株。

Effects of the catalyst preparation and reaction conditions of oligomerization on naphthalene conversion were investigated in detail.

详细考察了催化剂制备条件和反应条件对萘转化率的影响。

The suspensibility to seed clothing agent in compound system of naphthalene sulfonate condensate and nonionic surfactant was studied.

研究了聚萘磺酸盐与非离子表面活性剂复配体系对种衣剂的悬浮性。

The heat transfer experiments were made in the working of temperature range of the naphthalene heat pipe, at small inclination Angle.

根据萘热管的工作温度范围，对萘热管小倾角放置时的传热极限进行了实验研究。

The process to prepare alkyl naphthalene by alkylation is the most ripe one, key technology of which is preparation of high efficient catalyst.

烷基化制备烷基萘是目前最成熟的工艺路线，其关键技术是高效催化剂的制备；

Naphthalene sulfonates of purification product, has the air-entraining, super plasticizing, efficient decrease water and enhance etc. Function.

萘磺酸盐的提纯产品，具有非引气、超塑化、高效减水和增强等功能。

In this paper, the synthesis methods and processes from naphthalene, methylnaphthalene, toluene and xylene as starting materials were introduced.

本文全面的介绍了以萘、甲基萘、甲苯及二甲苯为原料合成二甲基萘的工艺。