有报道称，内地一些供应商不择手段将次等乌龙茶叶包装为大红袍，或者使用化学添加剂改善劣质茶叶的色泽。
Unscrupulous suppliers on the mainland have reportedly been packaging lower-quality oolong as Da Hong Pao, a famous rock tea, or enhancing low-quality leaves with chemical additives.
食品配料/添加剂，茶叶/咖啡/可可粉，食品， 工程塑料，树脂，化学原料，药品，染料，颜料，动物饲料。
Food ingredients/flavors, Tea/Coffee/Cocoa powder, Dried foods, Polymer, Resins, Chemical & Pharmaceuticals, Dyes, Pigment, Animal Feeds.
科学家们报告说，茶叶含有320种以上的化学成分。
Scientists reported that tea leaves contain more than 320 kinds of chemical components.
目前，只能从茶叶中提取到EGCG，还不能进行化学合成。
At present, we could not get EGCG from chemical synthesis in addition to extracting from tea.
茶叶多糖(TPS)是茶叶中主要有效化学成分之一。
Tea polysaccharide (TPS) is one of major chemical compositions of tea.
土壤地球化学特征与茶叶品质的关系至为密切。
Relationship between soil geochemical characteristics and tea quality is close.
采用紫外、高效液相色谱对微波提取物进行了定性分析并与标准谱图对照，结果表明微波短时处理茶叶，茶多酚的化学结构无明显变化。
TP was analyzed by UV spectrum and HPLC. The result showed that green tea was treated by microwave in a short time, the structure of TP was changed little.
本论文将微波、超声波应用于茶饮料浸提过程中，研究其对茶叶主要化学成分浸出的影响。
The effects of microwave and ultrasound extracting methods on the main components of tea infusion were studied.
本发明是一种茶叶加工品质化学调控技术，属茶叶加工领域。
The present invention refers to a chemical quality control technique in tea processing.
50年代首次从茶叶中提取、精制出茶氨酸，并确定了它的化学结构，此后许多学者对其进行了大量的研究工作。
It was firstly extracted and refined from tea in 1950's and its chemical structure was also determined at the same time.
茶氨酸是茶叶特有的化学成分之一，对茶叶品质有重要影响。近年的研究发现茶氨酸有多种保健作用，非常具有开发前景。
The recent researches have found that theanine, an unique and important component in tea plants, has many bioactivities, and made it get more and more attention.
茶氨酸是茶叶特有的化学成分之一，对茶叶品质有重要影响。近年的研究发现茶氨酸有多种保健作用，非常具有开发前景。
The recent researches have found that theanine, an unique and important component in tea plants, has many bioactivities, and made it get more and more attention.
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