查询词典 citric acid

Citric acid anhydride was synthesized by citric acid and acetic anhydride with acetic acid as solvent.

以柠檬酸和乙酸酐为原料，乙酸为溶剂合成柠檬酸酐。

The results showed that 4-HR combined preventing browning reagent has good controling browning effects on the above four kinds of materials. The best combination to apple-slice is A2B2C1, namely 0.02% 4-HR, 0.03% antiscorbutic acid and 0.5% citric acid; the best combination to banana-slice is A2B2C2, namely 0.02% 4-HR, 0.03% antiscorbutic acid and 0.75% citric acid; the best combina...

实验结果表明4-HR组合防褐试剂对上述四种材料均表现良好的护色效果，其中对苹果切片的最佳组合是A2B2C1，即0.02%4-HR、0.03%抗坏血酸、0.5%柠檬酸；香蕉最佳组合是A2B2C2，即0.02%4-HR、0.03%抗坏血酸、0.75%柠檬酸；马铃薯切片和莲藕汁的最佳组合都是A1B1C2，即0.01%4-HR、0.02%抗坏血酸、0.75%柠檬酸。

Chicken, Chicken Meal, Whole Ground Brown Rice, Whole Ground Barley, Chicken Liver, Pea Fiber, Chicken Fat (Preserved with Natural Mixed Tocopherols and Citric Acid), Brewers Dried Yeast, Natural Chicken Flavor, Dried Egg Product, Oil Blend (Soybean oil, Olive Oil, Salmon Oil, Evening Primrose Oil; Preserved with Natural Mixed Tocopherols and Citric Acid), Pumpkin, Apples, Sweet Potatoes, Carrots, Spinach, Blueberries, Dried Cranberries, Clams, Whole Ground Flaxseed, Calcium Carbonate, Salt, Potassium Chloride, Taurine, Green Lipped Mussels, Dried Chicory Root Extract, Yucca schidigera extract, Grape Seed Extract, Dried Kelp, L-Ascorbyl-2-Polyphosphate, Glucosamine Hydrochloride, Chondroitin Sulfate, Vitamin E Supplement, Ferrous Sulfate, DL-Methionine, Zinc Proteinate, Zinc Oxide, Manganese Proteinate, Niacin, Copper Proteinate, Folic Acid, Vitamin B12 Supplement, Copper Sulfate, Manganous Oxide, Vitamin A Supplement, Sodium Selenite, Thiamine Mononitrat Calcium Pantothenate, Riboflavin, Pyridoxine Hydrochloride, Biotin, Vitamin D3 Supplement, Menadione Sodium Bisulfite Complex, Calcium Iodate, Dried Lactobacillus acidophilus Fermentation Solubles, Dried Lactobacillus lactis Fermentation Solubles, Dried lactobacillus casei Fermentation Solubles, Rosemary Extract.

创造了一种全新的生产模式：低温焗炉焗制，低温焗烤不仅保存了食物中的营养和矿物质，而且降低了油份，让您的宠物食得更健康。更值得一提的是，通过数年投入大量人力、财力经过不断的尝试，终于于2009年年初研制出适合猫咪的最好食粮，无论从口感、成分配比，营养分析等综合因素，是您可以选择的最好的食材。鸡肉，鸡肉粉，全糙米，全地面大麦，鸡肝，豌豆纤维，鸡脂肪（天然保存溷合生育酚和柠檬酸），干酵母，天然鸡肉香精，干蛋产品，溷合油（豆油，橄榄油，三文鱼油，月见草油，天然溷合生育酚和柠檬酸保存），南瓜，苹果，红薯，胡萝卜，菠菜，蓝莓，小红莓干，蛤，全亚麻籽，碳酸钙，盐，氯化钾，牛磺酸，绿唇贻贝，干菊苣根提取物，丝兰提取物，葡萄籽提取物，干海带，L -抗坏血酸- 2 -聚，氨基葡萄糖盐酸盐，硫酸软骨素，维生素E补充，硫酸亚铁，DL -蛋氨酸，锌蛋白盐，氧化锌，锰蛋白盐，烟酸，铜蛋白盐，叶酸，维生素B12，硫酸铜，氧化锰，维生素A补充剂，亚硒酸钠，硫胺Mononitrat泛酸钙，核黄素，盐酸吡哆醇，生物素，维生素D3的补充，亚硫酸氢钠甲萘醌复合，碘酸钙，干嗜酸乳杆菌发酵米糠，干乳酸乳杆菌萃取物，干乳杆菌萃取物，迷迭香提取物。

For many years, the company has been devoting to the spectacled production of citric acid and sulfuric acid, has cultivated a group of high-level professional and technical staffs and founded several well-equipped production line of citric acid and sulfuric acid.

多年来，公司一直致力于柠檬酸和硫酸的专业化生产，缔造了一批高水平的专业技术人员以及数条装备精良的柠檬酸和硫酸生产线；年产柠檬酸和柠檬酸系列产品6万吨、硫酸系列产品20余万吨。

The Surface composition of grafted PET fiber was characterized by ATR-FTIR. THE results showed that there were no obvious differences between ungrafted and graft PET fiber in the spectra ,except that the typical peak of-OH in 3100cm~(-1) appeared in both Citric acid treated PET fiber and Acrylic acid treated PET fiber indicated citric acid and acrylic acid had been successfully grafted on the surface of PET fiber.

对样品的接枝效果进行红外光谱表征，发现无论是经过丙烯酸接枝处理，还是柠檬酸接枝处理，处理前后纤维的红外吸收光谱图都没有明显的区别，说明接枝前后纤维的主体性质没变，但是，二者在3100cm~(-1)处都出现了羟基的特征吸收峰，说明柠檬酸和丙烯酸都已经接枝上了PET纤维表面。

The results show that complexing agent greatly effects on film's density. For the double complexing agents solution system based on citric acid, the solution with lactic acid and citric acid produced most compact film with lowest porosity; and for the double complexing agents solution system based on butane diacid, the solution with butane diacid and malic acid made most compact film with lowest porosity.

研究结果表明：络合剂对镀层的致密度影响显著，对于以柠檬酸为基的双络合剂体系镀液来讲，乳酸-柠檬酸双络合剂体系镀液获得的镀层致密度最好，具有最低的气孔率；而对于以丁二酸为基的双络合剂体系镀液来讲，丁二酸-苹果酸双络合剂体系镀液获得的镀层致密度最好，具有最低的气孔率。

The obtained CBC was further reacted with stearic acid at 140℃ and hexadecyl alcohol at 180℃ in turn to form citric acid-beta-butylene glycol-citric acidstearic acid-hexadecyl alcohol claw large molecule.

以1，3-丁二醇、柠檬酸为原料，设计、合成了以1，3-丁二醇为核心的柠檬酸－1，3-丁二醇－柠檬酸爪状物小分子；再用酯化反应依次与带有功能化集团的硬酯酸、十六醇接枝合成了多元酯类爪形大分子柠檬酸－1，3-丁二醇－柠檬酸－硬酯酸－十六醇。

It indicates that the raw materials can be stored in temperature of 0-4℃ for 60 days, they must be immersed in clean water for more than one hour before processing, and peeling be carried out in flowing water; that color preserving solution should be 1.0% NaCl+0.2% citric acid+0.5% Vitamin C+110ppm dichloro isocyanuric acid sodium; that combined browning inhibiting solution is conspicuously effective, and immersion time better be around 20 minutes; that sterilization solution ought to be 200ppm dichloro isocyanuric acid sodium+0.5% ascorbic acid+0.3 citric acid, and 10 minutes' immersion will achieve the effect of sterilization and inhibiting browning; and that after 20-21 minutes of quick-freezing in temperature of -31℃~-32℃, the products can be preserved under -18℃ for a whole year.

通过对速冻牛蒡加工过程中原料储存、削皮方法、护色、浸泡时间、无热杀菌、包装形式等参数进行研究表明：原料0-4℃可储存60天，加工前用清水浸泡1小时以上，削皮时在流水中进行，护色液筛选的1.0% NaCl＋0.2%柠檬酸＋0.5%维生素C十110ppm二氯异氰脲酸钠；复合褐变抑制溶液在抑制褐变方面有显著的效果，浸泡处理时间为20分钟为宜；杀菌液为200ppm二氯异氰脲酸钠＋0.5%抗坏血酸＋0.3柠檬酸，浸泡10分钟即可达到灭菌和抑制褐变的作用；经-31℃~-32℃温度下速冻20~21分钟，产品在-18℃条件下可储存一年。

A preparation method of the visible-light photocatalyst Bi2WO6 nano-powder is characterized by comprising the steps as follows:(1) the selection of raw materials;(2) bismuth nitrate Bi(NO33 question mark 5H2O is added into a citric acid solution to obtain the citric acid solution containing white sediment;(3) EDTA is added into ammonia water which is then added dropwise with the citric acid solution containing the Bi(NO3)3 question mark 5H2O so to obtain a solution of bismuth;(4) the solution of bismuth is added with (NH4)6W7O24 question mark 6H2O solution to form a precursor solution which is then stirred, dried, coked, cooled and ground to obtain decarburized powder;(5) the decarburized powder is roasted for 2h to 4h under 450 DEG C to 550 DEG C to obtain the visible-light photocatalyst Bi2WO6 nano-powder.

可见光催化剂Bi 2 WO 6 纳米粉体的制备方法，其特征在于它包括如下步骤：1原料的选取；2将Bi(NO 3 ) 3 5H 2 O加到柠檬酸溶液中，得到含有白色沉淀的柠檬酸溶液；3将乙二胺四乙酸加到氨水中，并缓慢滴加入含有Bi(NO 3 ) 3 5H 2 O的柠檬酸溶液中，得铋的溶液；4将(NH 4 ) 6 W 7 O 24 6H 2 O溶液加入上述铋的溶液中，组成前驱液；搅拌，干燥，焦化，冷却后，研磨，得去碳的粉体；5将去碳的粉体在450～550℃下焙烧2～4h后，得到可见光催化剂Bi 2 WO 6 纳米粉体。

Citric acid anhydride was synthesized by citric acid and acetic anhydride with acetic acid as solvent.

柠檬酸酐是由柠檬酸两个羧基间脱水形成的，具有吸水性和酰化能力，是合成农药、医药、食品、饮料、清洁剂、化妆品和树脂的一种重要的中间体[1-2]。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。