月桂醛

After ultra high pressure treatment, limonene concentration was decreased greatly while myrcene and α-pinene concentrations were not changed significantly and the concentration of limonene was decreased by 75% after high pressure treatment of 500 MPa for 15 min,α-terpineol and carvone concentrations were increased significantly. The aldehydes concentrations were retained well. The ester concentrations were changed under high pressure treatment, but generally their concentrations were not changed remarkably.

通过定量检测分析发现：超高压处理对橙汁中的柠檬烯成分影响很显著，经500 MPa的压力处理15 min后其含量下降了75%，而月桂烯和α-蒎烯受高压影响较小；α-松油醇、香芹酮含量经高压处理后迅速增加；醛类特征香气成分基本不受高压影响；酯类成分在高压下会发生变化，但总体变化不显著。

Amino-6-methoxy Benzothiazole 99%、2-Amino Benzothiazole 99%、Veratraldehyde 99%、Veratric Acid 99%、1,2- Dimethoxy Benzene 99%、6-Nitroveratric Acid 97%、2,5-Dichlorobenzoic Acid 99%、4-Chloro-3-Nitrobenzoic Acid 99%、 3-Nitrobenzole Acid 98%、p-Methoxybenzoie Acid 99%、Anisole 99.5%、p-Methoxyacetophenonc 99%、(2'-Chloroethyl) Benzene 99%、(2'-Bromoethyl) Benzene 99%、N,N-Diethyi-m-Toiuamide 99%、Aminoacetonitrile Hydrochloride 98%、 Alkyl Diphenyl Phosphate Estrel 98%、5-Chloro-2-benzothiazolone 99%、6-bromo-2-naphthol 98%、6-Nitro-Veretric Acid Estrel 97%、4-chloro phenoxyaeetic 99

2-氨基-6-甲氧基苯骈噻唑、2-氨基苯骈噻唑、藜芦醛、藜芦酸、藜芦醚、6-硝基藜芦酸、2，5-二氯苯甲酸、3-硝基-4-氯苯甲酸、3-硝基苯甲酸、对甲氧基苯甲酸、苯甲醚、对甲氧基苯乙酮、β-氯代苯乙烷、β-溴代苯乙烷、N，N-二乙基间甲苯甲酰胺、氨基乙腈盐酸盐、磷酸二苯月桂酯、5-氯-2-苯骈噻唑酮、6-溴-2-萘酚、6-硝基藜芦酸甲酯、4-氯苯氧乙酸

Furoin was synthesized from furol with VB1 as the catalyst,which was then reacted with acetyl chloride, lauroyl chloride ,benzoyl chloride,α-furoyl chloride and 3-α-furyl acryloyl chloride,respectively;corresponding monoester compounds of furoin were synthesized in THF in the presence of sodium hydroxide under reflux.

以糠醛为基础原料，经维生素B1催化合成糠偶姻，再由糠偶姻分别和乙酰氯、月桂酰氯、苯甲酰氯、α-呋喃甲酰氯和3-α-呋喃烯丙酰氯反应，在NaOH/无水THF体系中，于水浴回流条件下合成了相对应的糠偶姻单酯类化合物。

The DielsAlder reaction of myrcene and acrolein over ZnCl2/NaY prepared by solidstate interaction under microwave irradiation, conventional heating physical mixture, and over ZnNaY prepared by ion exchange in solution was studied.

比较了微波固相法、普通加热法和简单混合法制备的ZnCl2／NaY及溶液离子交换法制备的ZnNaY在月桂烯与丙烯醛DielsAlder反应中的催化性能，发现微波固相法制备的催化剂表现出最高的环加成选择性和区域选择性。

Linear dimerization of isoprene to form myrcene ;2. Synthesis of Unsaturated Cyclothioethers byCycloaddition Reactions of Myrcene;3. The traditional synthesis is by the way of Diels-Alder reaction of myrcene with acrolein over Lewis acid catalysts in organic solvent.

二烷基咪唑或烷基吡啶卤化物与ZnCl2 构成一类新型的具有Lewis酸性的离子液体，以其为催化剂和反应介质，通过月桂烯与丙烯醛的Diels Alder反应高区域选择性地合成了对位柑菁醛。

Microwave irradiation ; solidstate interaction ; zinc chloride ; NaY zeolite ; myrcene ; acrolein ; DielsAlder reaction ; myrac aldehyde

微波辐射；固态作用；氯化锌； NaY分子筛；月桂烯；丙烯醛； Diels-Alder反应；柑菁醛

Samples were subjected to high pressure ranging from 100 to 500 MPa. After high pressure treatments, the flavour compounds were extracted by Solid-Phase Microextraction. Analysis was carried out by Gas Chromatography-Mass Spectrometry. The key flavour compounds of orange juice were three alkenes (namely limonene, myrcene and α-pinene), two alcohols (linalool and α-terpineol), three aldehydes, one ketone and two esters (ethyl butyrate and 3-OH-ethyl hexanoate).

采用固相微萃取（Solid Phase Microextraction，SPME）方法对不同压力（100～500 MPa）超高压处理的鲜榨橙汁中的香气成分进行富集，并经气相色谱-质谱联用仪（Gas Chromatography-Mass Spectrometry，GC-MS）检测分析，橙汁中的主要香气成分有：3种烯（柠檬烯、月桂烯、α-蒎烯）；2种醇；3种醛；1种酮；2种酯（丁酸乙酯、3-OH-己酸乙酯），它们是构成橙汁的主要特征致香成分。

Dimethyloldodecanoic acid was synthesized using lauric aldehyde ,formaldehyde and hydrogen peroxide as regents through aldol condensation and oxidation reactions.

研究了以月桂醛、甲醛、过氧化氢为原料，经羟醛缩合、过氧化氢氧化合成2，2-二羟甲基十二酸的方法，探讨了原料摩尔比、催化剂或氧化剂用量、反应温度和时间对羟醛缩合反应和氧化反应的影响。

Reaction of citric acid with paraformaldehyde gave anhydromethylene citric acid with a yield of 63%;the reaction of compound with acetic anhydride gave the corresponding anhydride with a yield of 87%;the esterification of compound with lauryl alcohol gave anhydrocitric acid monoester with a yield of 76%.

将等浓度的柠檬酸和多聚甲醛加热，反应生成柠檬酸缩醛环酯，产率为63%；与乙酸酐反应得到相应的柠檬酸酐，产率为87%；与月桂醇酯化，生成产物，产率为76%；用二氧六环做溶剂，将与等浓度的碱进行开环反应，生成柠檬酸月桂醇单酯，产率为83%。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。