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化學(xué)化工專業(yè)英語 版權(quán)信息
- ISBN:9787308078351
- 條形碼:9787308078351 ; 978-7-308-07835-1
- 裝幀:暫無
- 冊數(shù):暫無
- 重量:暫無
- 所屬分類:>>
化學(xué)化工專業(yè)英語 本書特色
《化學(xué)化工專業(yè)英語》:高等院;せ瘜W(xué)類專業(yè)系列教材
化學(xué)化工專業(yè)英語 目錄
化學(xué)化工專業(yè)英語 節(jié)選
《化學(xué)化工專業(yè)英語》內(nèi)容簡介:This book selects a number of breakthroughs and examples in the development of new energy technology,biotechnology, novel materials and drugs, environmental technology, and other fields. A few historic events and figures designated by the American Chemical Society as "Chemical Landmarks" are adopted. Also featured in the book are a group of original papers and patent documents in the cutting-edge fields of chemistry and chemical industry. Stories about how the chemists and engineers vigorously explored and made great inventions are described in the book. Following the texts in each unit are notes, words with pronunciations and meanings, quiz including exercises and drills for reading comprehension and short compositions, and in-class discussion themes.This book also explains in detail how to comprehend and utilize papers and patent documents, and how to write and revise papers in practice.The book contains a significant amount of technical terminology. Lists of common glossaries with concise explanations are provided in the end of the book. Basic laboratory tools are also illustrated graphically. Records of famous chemists and engineers with their lives and areas of expertise can be used as a reference. This book serves as a textbook in bilingual education in colleges for juniors and seniors, as well as graduate students, who are non-native speakers of English but majoring in chemistry, applied chemistry, chemical engineering, materials chemistry and related disciplines. The book is also an indispensable working resource for scientists, chemists,and engineers in chemical industry and academia. This book is printed in bicolor to improve readability.
化學(xué)化工專業(yè)英語 相關(guān)資料
插圖:Load a small amount of solid into a test tube, followed by adding about one milliliter of the testsolvent. If the solid dissolves immediately at room temperature, the solvent is not suitable forrecrystallization. Repeat this process with another test solvent using a clean test tube. If the solid doesnot dissolve, heat up the test tube using a hot water bath whose temperature is set at the boiling pointof the test solvent. If the solid still remains, then this solvent is not good, either. Repeat with othersolvents until the solid remains at room temperature, but dissolves in the solvent with the temperatureat the boiling point, indicating a good recrystaUization solvent.In the second step, the solid to be recrystallized is dissolved in the hot suitable solvent. TwoErlenmeyer flasks (one for the solvent and the other for the crystals), a hot plate, a disposable pipetand bulb, finger cots, and some boiling stones are needed in this step. Place two boiling stones in eachflask to ensure smooth boiling during heating. A small amount of solvent is added to a flaskcontaining the impure solid, and then the suspension in the flask is heated to the boiling point of thesolvent until the complete dissolution of the solid. If the solid does not dissolve, add more hot solventdrop-wise continually until the solid is fully dissolved. A hot filtration is required if the solutioncontains visible solid impurities other than boiling stones. If the solution appears colored, the hotsaturated solution is boiled for a short period of time with the addition of activated carbon to removecolored impurities, followed by a hot filtration to get rid of the activated carbon.
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