aromatic substance

To subject ( a substance) to distillation. a tar formed from distillation of bituminous coal; coal tar can be further distilled to give various aromatic compounds.

蒸馏使（某物质）蒸馏蒸馏生煤得到的焦油，继续蒸馏能得到各种芳香族化合物。

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First, the synthesis of asarone reference substance was as a research activity, Second, the aromatic ketone was synthesized by Friedel-Crafts reaction, Meanwhile, the synthesis of 2,4,5-trimethoxy benzaldehyde used as intermediates.

首先合成α-细辛醚作为研究活性的对照品，其次通过傅克反应合成一系列的芳香酮，同时合成2,4,5-三甲氧基苯甲醛作为中间体。

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How to reduce the loss of aromatic substance and nutrient substance and to prevent producing the bitter substance in the citrus juice are the key points that should be concerned when adjusting and optimizing the technological operation in the citrus juice processing.

如何减少柑橘汁芳香物质和营养物质的损失、如何减少柑橘汁中苦味物质的生成是柑橘汁产业调整和工艺优化需要考虑的关键问题。

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Incense is an aromatic substance or preparation that produces pleasant fragrance when burned.

香是香料的一种或者是当燃烧时令人愉悦的芳香物的配制品.

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Beekeepers have long known of: the extraordinary properties of propolis& a sticky, red, resinous and aromatic substance produced by worker bees.

蜂胶是由工蜂生产出来的一种黏性物质，色红，含树脂，有芳香味，对此特性养蜂人早就了解。

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Is studied in the process of condensate producting aromatic hydrocarbon with chromatog-raphy determining its intermediate and foreign substance of products which play an positive role for assuring effective composition content of products and stabilize their quality in the production of chemical industry.

研究了气相色谱法测定凝析油生产芳烃过程中，中间体及产品杂质的测定，在化工生产中对保证产品有效成分含量，对稳定产品质量有着积极的作用。

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