正丁酸

Monocholesterylsuccinate is synthesized using cholesterol and succinic anhydride as raw materials in heptane and trace pyridine as catalyst.

以正庚烷为溶剂、吡啶为催化剂，采用丁二酸酐和胆固醇以均相法合成了丁二酸单胆固醇酯。

In comparison with the organic solvents as reaction medium, higher conversion was achieved the tert-ethyl valerate could be formed in the ionic liquid medium.

当反应体系中存在水时，有特戊酸生成。表明反应中2，2，4-三甲基戊烷首先发生β-断裂反应，生成叔丁基正碳离子和异丁烯。

Spraying with chitosan of different concentration significantly increased the content of chlorophyll ,anthoxanthin ,chlorogentic acid, polyphenal ,soluble protein and total soluble sugar of Broccoli flowers. 40 mg L-l chitosan showed the most remarkable effet,compared to control, the content of chlorophyll ,anthoxanthin ,chlorogentic acid, total soluble sugar and soluble protein of treated Broccoli flowers increased by 64.4%,282.5%,35.6%,16.2% 22.7% respectively.PAL and PPO are key enzymes in synthesize of phenolics.No relation was found between phenolics synthesize and PAL activity in Broccoli flowers,but it showed positive relation between phenolics synthesize and PPO activity.

研究表明，本研究中，不同浓度几丁聚糖喷施对青花菜花球的叶绿素、类黄酮、绿原酸、多酚总量、可溶性蛋白及可溶性总糖的含浙江大学硕卜学位论文(2004)量有显著增加，其中以浓度为40mgL一'影响最为显著，花球中的叶绿素、类黄酮、绿原酸、可溶性总糖、可溶性蛋白分别较对照提高64.4%、282.5%、35.6%、 16.2%、22.7%，苯丙氨酸解氨酶、多酚氧化酶是酚类物质合成中关键酶，花球内酚类物质合成与苯丙氨酸解氨酶的活性没有一定的相关性，而与多酚氧化酶的活性呈正相关。

Multiple-walled carbon Nanotubes were used as carrier to load cerous sulfate catalyst for catalytic synthesis of n-butyl propionate Single factor and orthogonal experiment methods were applied to investigate the effects of the molar ratio of butyl alcohol to propionic acid, cerous sulfate mass fraction and reaction time on the conversion of propionic acid and the optimal technical conditions were determined as:ratio of butyl alchhol and propionic acid 1.5:1, cerous sulfate mass fraction 15% and reaction time 70 min.

以多壁碳纳米管作载体担载硫酸铈催化合成丙酸丁酯。分别采用单因素和正交实验方法考察了醇酸摩尔比、硫酸铈质量分率和反应时间等主要因素对丙酸丁酯得率的影响，并确定了最佳工艺条件为：醇酸摩尔比1.5：1、硫酸铈质量分率15%和反应时间70 min。

Fuqifeipian Mapo tofu dumplings 10 minutes Long Chao Shou country Kawakita Bean duck Center Street; Long Chao Shou, Tam Tam Lai dumpling noodles artillery three small carp jelly bean, Galinsoga intestinal crisp, diving chickens, children burn lines Guoba soft-shelled turtle meat, steamed Galinsoga East Star Spot, spicy broth juice Tsai praised wings, sweet longan burning white, Spice Hui Guorou home-egg smell of urine, water Bullfrog Suantang cabbage, Jiang Bao King in Ap ribs, green mandarin fish Law, Ma, Fissidens sesame soup cans tile, and the first Rong Bone, parsley Geely pills, a fish stand, Ermaojiza pot simmer, Behind Xiangqian wild chickens, Luo their ears Prince, Zhahai Law Hui Guorou water cabbage, Jiang Bao King in Ap ribs, Ma Law green mandarin fish, sesame characteristics Fissidens Huang Lading, the head of public chicken, carp postal kiosk, to pull the Jiu Chi-sheng E Chang Hong Shaorou Mother, Mother did not eat fish

夫妻肺片麻婆豆腐钟水饺龙抄手国正街鸭子川北凉粉；龙抄手，担担面三大炮赖汤圆丁凉粉豆腐鲫鱼、辣子脆肠、跳水鸡、芋儿烧甲鱼锅巴肉片、辣子蒸东星斑、高汤辣汁褒仔翅、龙眼甜烧白、香辣回锅肉家常臊子蛋、酸汤牛蛙开水白菜、酱爆鸭霸王排骨、碧绿椒麻桂鱼、麻酱凤尾罐瓦汤、蓉和第一骨、吉利香菜丸、一条站着的鱼，二毛鸡杂煨锅，迷踪野鸭湘黔鸡，罗腊耳朵，扎海椒回锅肉开水白菜、酱爆鸭霸王排骨、碧绿椒麻桂鱼、麻酱凤尾特色黄辣丁、鱼头烧鸡公、邮亭鲫鱼、九尺生抠鹅肠大妈红烧肉、大妈鱼吃饱没有

The method is as follows: n-butyl titanate, absolute ethyl alcohol, surfactant and concentrated hydrochloric acid are fully mixed and stirred for 4 to 6 hours under room temperature to obtain precursor solution, then the precursor solution is spinningly coated on a clean conductive glass substrate of an indium oxide tin coating, and then the conductive glass spinningly coated with the precursor solution is preserved for 25 to 72 hours at the temperature of between 20 and 30 DEG C and the relative humidity of between 50 and 75 percent below, and finally undergoes a high-temperature calcination at the temperature of between 350 and 700 DEG C.

将钛酸正丁酯，无水乙醇，表面活性剂和浓盐酸充分混合，在室温下搅拌4小时-6小时得到前驱剂，然后将前驱剂旋涂在清洁的氧化铟锡镀层的导电玻璃基底上，接着在20℃-30℃，相对湿度在50％-75％下，将旋涂有前驱剂的导电玻璃保存24小时-72小时，最后经过350℃-700℃高温煅烧。

Results The mixing, loading and storing processes of the construction, might generate lots of occupational hazards, including toluene, dimethylbenzene, trimethylbenzene, isopropanol, butyl alcohol, propanol, methyl methacrylate, butyl acetate, methyl isobutyl ketone, methyl ethyl ketone, acetic ether, nitro-cotton, n-hexane, n-heptane, carbinol, ethanol, ethyl propionate, diisobutyl ketone, glycol ether, isoamyl acetate, 2,4-toluene diisocyanate, isophorone, noise, power frequency electric fields.

结果 该项目在混兑生产和装卸、仓储过程中，可能产生的职业病危害因素主要有甲苯、二甲苯、三甲苯、异丙醇、丁醇、丙醇、甲基丙烯酸甲酯、乙酸丁酯、甲基异丁基甲酮、丁酮、乙酸乙酯、硝化棉、正己烷、正庚烷、甲醇、乙醇、乙酸丙酯、二异丁基甲酮、乙二醇乙醚、乙酸异戊酯、2，4甲苯二异氰酸酯、异佛尔酮、噪声、工频电场。

In this paper tungstosilicic triethanolamine salt and tungstophoric triethanolamine salt were prepared and used as catalysts in the synthesis of n-butyl lactate ,The synthetic conditions with tungstosilicic triethanolamine salt as catalyst were also examined.

合成了硅钨三乙醇胺盐和磷钨酸三乙醇胺盐，并以它们为催化剂，合成了乳酸正丁酯。

Firstly, headspace solid-phase microextraction was established to determine AITC by orthogonal design. Extraction temperature, stir speed, extraction time, and desorption time were set at 40℃, 900r/min, 30min, and 5min, respectively. Under these optimal conditions, volatile flavor compounds in mustard oil, wasabi, and 'Chongcai'leaf mustard product were identified by SPME/GC/MS. In these three samples, 6,12,17 constituents were identified respectively; Allyl isothiocyanate was the main flavor compound, which accounted for 73.45%, 64.25%, 32.74% of total volatile compounds, respectively. Carbon disulfide, a hydrolysis product of AITC, accounted for 14.37% 25.40%, 51.67% of total volatile compounds respectively. There were some other isothiocycannates, such as butane, 1-isothiocyanato-, isobutyl isothiocyanate, 1-benzene, 4-isothiocyanato-, benzene (2-isothiocyanatoethyl)-, etc.

首先采用正交实验设计优化固相微萃取技术的前处理条件，结果表明，以萃取温度40℃、搅拌速度900r／min、萃取时间30min、解吸时间5min为最佳条件；在此最优条件基础上，利用SPME／GC／MS联用技术分析芥末油、青芥辣、冲菜的挥发性风味成分，分别检出6、12、17种化合物，主要风味物质均为AITC，相对丰度分别为73.45％、64.25％、32.74％；AITC的水解产物二硫化碳的相对丰度分别为14.37％、25.40％、51.67％；还检测到了其它几种异硫氰酸酯，如异硫氰酸丁酯、异硫氰酸异丁酯、异硫氰酸丁烯酯、2-苯乙基异硫氰酸酯等。

The experiment results indicate that higher phase splitting speed and extraction factor can be achieved when low-carbon alcohols such as n-butanol are used as organic solvents; by using five different N-carbobenzyloxy-L-amino acids as chiral ligands that are formated with Cu(superscript 2+) or Ni(superscript 2+), it is found that as a ligand, Z-Phe has a low extraction factor, while Z-Hyp, Z-Pro, Z-Glu, Z-Val have higher extraction factors, and among these, Z-Val has the highest distribution coefficient; pH value of extractant, when near to the PI of phenylalanine, helps to improve extraction resolution effect; temperature has no obvious effect on the resolution result.

结果表明：以低碳醇类正丁醇作有机稀释剂，所用5种N-苄氧羰基氨基酸（分别为Z-Phe、Z-Hyp、Z-Pro、Z-Glu、Z-Val）与Cu(上标 2+)或Ni(上标 2+)形成手性配位体后，以Z-Val作手性配体，萃取相pH值接近苯丙氨酸等电点时，萃取拆分效果最佳。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。