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Crotonaldehyde aldehyde is acetaldehyde as raw materials, as a condensation NaOH solution extraction, manufacturing sorbic acid is the main raw material.

巴豆醛是以乙醛为原料，经NaOH溶液萃取缩合产生，是制造山梨酸的主要原料。

The crotonaldehyde is produced upon catalysis and condensation with acetic aldehyde as raw materials. It is a major raw material for making sorbic acid.

巴豆醛是以乙醛为原料，经NaOH催化缩合产生，是制造山梨酸的主要原料。

objective:with the local lobster shell as the raw material,we inquire into the abstraction and preparation of chitin and chitosan to develop a new raw material resources for chitosan.methods:use methods such as take off protein,calcium,colour,deacetylate and purification to prepare chitosan to study deacetylate degree,molecular weight and other characters of chitosan,then compare with infrared spectrum of bio-chemical chitosan on market.results:the chitin and chitosan obtained from lobster shell are 14.8% and 8.9%, respectively.

目的：以地产龙虾壳为原料，探讨其甲壳素的提取和壳聚糖的制备方法，以开发壳聚糖制备的新原料资源。方法：用脱蛋白、除钙、脱色、脱乙酰基、纯化等方法制备壳聚糖，研究其壳聚糖的脱乙酰度、分子量等性质，并与市售生化级壳聚糖的红外光谱进行比较。

A catering service provider shall, during the production and processing process, check the food and raw materials to be processed, and shall not process or use any food or raw material which is found to be rotten or deteriorative or abnormal in sensory properties.

餐饮服务提供者在制作加工过程中应当检查待加工的食品及原料，发现有腐败变质或者其他感官性状异常的，不得加工或者使用。

The method comprises following steps: taking diphenol and 3- trifluoromethyl- 4- chloronitrobenzene as raw material, salt precipitating for diphenol and potash, refluxing with water- containing toluene, reacting with 3- trifluoromethyl- 4- chloronitrobenzene and getting dinitro monomer; taking dinitro monomer, ferro powder and HCl as raw material, ethanol and water as disslovant for refluxing and ethanol recrystallization, getting fluorine- containing aromatic diamido monomer.

合成方法是以二酚与3-三氟甲基-4-氯硝基苯作原料，先将二酚与碳酸钾成盐，甲苯带水回流反应，然后与3-三氟甲基-4-氯硝基苯反应制得二硝基单体；再以二硝基单体，铁粉，HCl为原料，乙醇和水做溶剂，回流反应、乙醇重结晶，得到含氟芳香二胺基单体。

Products are widely used in paints, coatings, pesticides, inks and plastics in different sectors, such as S-800, S-1000, S-800, S-1500, S-1800, S-2300 series of aromatic solvents and as the production of advanced insulation materials Durene raw materials, as well as important chemical raw materials naphthalene oil industry.

产品为广泛用于油漆、涂料、农药、油墨和塑料等不同行业的S-800、S-1000、S-800、S-1500、S-1800、S-2300系列芳烃溶剂和作为生产高级绝缘材料原料的均四甲苯，以及重要的化工原料石油工业萘。

Our company is mainly engaged in chemical raw materials trading, the company mainly engaged in: toluene, xylene, mesitylene, durene, 6 # 120 # 200 # solvent, ethyl acetate, butyl acetate, acetone, butanone, cyclohexanone, isophorone, MIBK, isopropyl alcohol, isobutyl alcohol, butanol, mixed alcohols, methanol, ethanol, ethylene glycol, diethylene glycol, diacetone alcohol, Anti-White Water, CAC, n-hexane, dichloromethane, trichloro-B, DMF, 5 # 10 # 15 # white mineral oil, lubricating oil, sewing machine oil, as well as high-pressure polyethylene, linear polyethylene, low-pressure polyethylene, polypropylene, rubber and other chemical raw materials.

我公司主要从事化工原料贸易，公司主要经营：甲苯、二甲苯、三甲苯、四甲苯、6# 120# 200#溶剂、醋酸乙酯、醋酸丁酯、丙酮、丁酮、环已酮、异佛尔酮、MIBK、异丙醇、异丁醇、正丁醇、混丙醇、甲醇、乙醇、乙二醇、二甘醇、二丙酮醇、防白水、CAC、正已烷、二氯甲烷、三氯乙、DMF、5# 10# 15#白矿油、润滑油、针车油以及高压聚乙烯、线性聚乙烯、低压聚乙烯、聚丙烯、橡胶等各种化工原料。

Methods: college students were administered by open-type questionnaire and interview to develop the raw scale. The raw scale was administered to an college students sample for Exploratory Factor Analysis; the emendatory questionnaire was filled by 715 college students for Confirmatory Factor Analysis.

采用开放式问卷和访谈形成最初的调查表，然后选取在校大学生708人（男生395人，女生313人）进行探索性因素分析；选取三所高校在校大学生715人（男生398人，女生317人）进行验证性因素分析。

7 We are disposed to believe that we should safely recommend the institution both of the raw material examination, on the line of the present examinational rules made by provincial government, to insure the quality of the raw material, and of the finished product examination, on the national standards instead of the provincial rules, in order to keep the high rate of accepted products.

我们倾向于相信，我们应该有把握建议建立原材料检测制度和成品检测制度：原材料检测制度应该以目前省政府制定的检测条例来进行，旨在确保原材料的质量；成品检测不以省的条例进行，而以国家标准来检测，目的保持产品的合格率。

But also should see, our country basically is hold the market with cheap raw ore, lump raw ore exports a quantity to occupy the 95 ％ above that always speaks a volume, the 1／ that average price is price of farinaceous product export only 2, under Moroccan export price, the price that compares Euramerican country is lower.

但是也应该看到，我国主要是以廉价的原矿占据市场，块状原矿出口量占总出口量的95％以上，平均价格只是粉状产品出口价格的1／2，低于摩洛哥的出口价格，比欧美国家的价格更低。

He has to relate with three women in the movie, and yet remain implicitly faithful to the unseen Lucinda.

让克劳德布里亚里成功地饰演试验了一个难度很大的角色：和三个女人打交道，但还要底下对观众未曾谋面的卢馨达保持忠诚。

The experiment was conducted to study effects of inulin on the growth performance, indices of immune organs and serum immunoglobulin of laying chicklings as well as the performance of inulin which replaced the antibiotics in diets by adding 0.2%, 0.4% and 0.8% of inulin, respectively.

试验旨在通过在蛋用雏鸡日粮中添加0.2%、0.4%和0.8%的菊粉，研究菊粉对蛋雏鸡生长性能、免疫器官指数和血清免疫球蛋白的影响，以及菊粉替代抗生素对蛋雏鸡的应用效果。