The F.D.A. does not yet have standards for e-liquids, but many of the Chinese companies say they make them in labs in the United States that have passed F.D.A. quality-control standards.

Among the concerns is that some smaller manufacturers use poor-quality insulation paint on the heating coils, paint that could prove dangerous if it leached into the e-liquids.

有人担心，一些规模较小的制造商会在加热线圈上使用质量很差的绝缘涂料，倘若这种涂料渗入电子烟液，可能会很危险。

Results As treated with original solutions or 1/ 2 dilution of DMSO cigarette smoke solutions only, the Viability of cells was below 80%, but it was beyond 80% when treated with PBS solutions.

结果DMSO烟液原液及其1/2稀释液染毒的细胞存活率低于80%，而PBS烟液染毒的细胞存活率均高于80%。

Stephen fell asleep owing to the heat from the wood fires in the tobacco barn, and when he awoke the fire was almost out.

由于烟草谷仓烧材的热度，斯蒂芬睡着了，当他醒来时，火几乎快燃尽了。

The method of fuzzy decoupling can solve the coupling problem between temperature and humidity in tobacco barn.

采用模糊解耦的方法，较好地解决了烤房中温湿度间的强耦合问题。

The stepping motor which drives the cigarette bin can use the pulse signal to directly implement the open-cycle positioning control, with a certain precision, simple control circuits, convenience for use and reliability.

驱动烟仓用的步进电机可以用脉冲信号直接进行开环定位控制，具有一定的精度，而且控制线路简单，使用方便、可靠。

Studies on inhibitions of 7 fungicides to fungi causing tobacco mildew during storage and their effects of mildew controlling

7种防霉剂对烟仓霉变微生物的抑制作用及防霉效果的初步研究

Investigation of Species 、 Damage and Distribution of Insects in Tobacco Leaf Store-House in Liaoning Province

辽宁省烟仓昆虫种类、分布及为害调查

Species of Natural Enemy and Biology of Predominant Natural Enemies in Tobacco Storage of Guizhou

贵州烟仓害虫天敌种类及优势种的生物学特性

In china, the tobacco storage pests have brought enormous economic loss.

在中国以烟草甲、烟草粉螟和大谷盗为代表的烟仓害虫有近40种，它们给企业和国家带来了巨大的经济损失。

Studies on the Fungi Causing Mildew of Stored Tobacco in Guangxi

广西烟仓主要霉变生物的鉴定、生物学特性及防治研究

Investigations on Tobacco Storage Pests and Their Enemies in Fujian Province

福建省烟仓害虫及其天敌调查

Study on the Relationship between Main Appearance Characters of Leaf and Chemical Compositions in Aromatic Tobacco

香料烟叶片主要外观性状与化学成分关系的研究

Effect of Fertilizing Boron on Aromatic Tobacco in South Anhui Province

皖南香料烟施硼效应

Effect of Soil Humidity on Aromatic Tobacco Root System Development and Activity

土壤湿度对香料烟根系发育和根系活力的影响

At the same time, the contents of aroma components were tested with 3 extraction methods of Aromatic tobacco condensate.

同时，对3种提取工艺条件下香料烟浸膏的香气成分含量进行了对比分析。

Aromatic tobacco testing method

GB5992-1986香料烟检验方法

Improvement of extraction method and the extraction conditions of aromatic tobacco extract were studied.

对烟草浸膏的提取工艺进行了改进，并对香料烟浸膏的提取条件进行研究。

Studies on Extraction Conditions of Aromatic Tobacco Extract

香料烟浸膏提取工艺条件研究

Studies on aroma components of aromatic tobacco condensate Holly Smoke

香料烟浸膏香气物质成分研究

Comparison of the Characteristics of Dry Matter Accumulation and Nutrient Absorption and Distribution of Aromatic Tobacco in Different Types of Ecological Regions

不同生态类型区香料烟干物质积累、养分吸收及分配特点比较