环烯

Amino-2-methylpropanol was used as the chemical modifying reagent of fatty acids to modify the carboxyl group into nitrogen-containing heterocycle which would effectively prevent the migration of carbon double bonds of the alkenyl in the electron impact source.

以2-氨基－2-甲基－丙醇为脂肪酸的化学修饰试剂，气相色谱－电子轰击质谱分析葵子油脂肪酸。2-氨基－2-甲基－丙醇将脂肪酸羧基修改为含氮杂环，使在EI源中避免了链烯基中碳碳双键的移动。

Amino-2-methylpropanol was utilized as a chemical modifying reagent to modify carboxyl groups in unsaturated fatty acids into nitrogen-containing heterocycles, which effectively suppressed the migration of double bonds of the alkenyl within the electron impact source and led to regular informative mass spectra indicative of the position of the olefinic bonds in the chain.

以2-氨基－2-甲基丙醇为脂肪酸的化学修饰试剂，将不饱和脂肪酸羧基化学修饰试剂，将不饱合脂肪酸羧基化学修饰成含氮杂环，从而避免了链烯基中碳碳双键在EI源中的移动，并使质谱呈现显示双键位置的规范信息。

The present invention relates to sulphonyloxazolamines of general formula, wherein R, R represent independently from each other H, A,-(CH2)n-Ar or alkenyl with 2-6 C atoms, R and R together also represent a mononuclear saturated heterocycle with 1-2 N, O and/or S atoms, Z is H, A, CF3, NO2, Hal, OH, OA, NH2, NHA or NA2, A represents alkyl with 1-6 C atoms, Ar is Z-monosubstituted or Z-disubstituted phenyl, halogen is F, Cl, Br or I, n is 1 or 2 or the physiologically acceptable salts or solvates thereof.

本发明涉及式磺酰基∴唑胺或其生理上可接受的盐或溶剂化物，其中R 1 ，R 2 每一个相互独立为H、A、－(CH 2 )n－Ar或具有2到6个C原子的链烯基，R 1 和R 2 也一起为具有1到2个N、O和/或S原子的单核饱和杂环，Z为H、A、CF 3 、NO 2 、卤素、OH、OA、NH 2 。NHA或NA 2 ，A为具有1到6个C原子的烷基，Ar为被Z取代的或Z二－取代的苯基，卤素为F、Cl、Br或I，n为1或2。

The invention concerns a process for preparing heterocyclic carbenes of general formula in which R1, R2, R3 and R4 are identical or different and mean saturated or unsaturated, straight-chain, branched or cyclic, unsubstituted or substituted C1-C10 alkyl, C2-C5 alkylidene, C2-C5 alkylidine, C7-C19 aralkyl or C6-C14 alkyl groups, R3 and R4 can also stand for hydrogen or form jointly anellated, substituted or unsubstituted groups with between 3 and 7 carbon atoms and X stands for carbon or nitrogen, R3 being dropped if X is nitrogen.

本发明涉及一种制备通式Ⅰ的杂环碳烯的方法，其中在通式Ⅰ中，R1、R2、R3和R4是相同的或不同的，并且是饱和的或不饱和的，直链、支链或环状的，未取代或取代的C1－C10－烷基、C2－C5－亚烷基、C2－C5－次烷基、C7－C19－芳烷基或C6－C14－芳基基团，R3和R4可以是氢或它们一起形成具有3－7个碳原子的稠合的、取代或未取代的基团，X是碳或氮，并且当X是氮时，不存在R3。

According to somephysiological characteristic in Camptotheca acuminata and several specific functionsof CPT, allene oxide cyclase, a key enzyme of jasmonites pathway, was isolated fromCamptotheca acuminata; mealwhile, it was investigated whether themRNA expression of CaAOC was related to the content of CPT in Camptothecaacuminata.

根据喜树自身的一些生理现象和喜树碱在其中可能参与的一些特殊作用，我们主要从喜树中克隆了茉莉酸合成途径的关键酶丙二烯氧化物环化酶(allene oxide cyclase，AOC)基因并考察了其对喜树碱含量的影响，同时还进行了其他方面的相关研究。

One synthetic strategy started fromγ-butyrolactone 38, from which a cyclohexadiene intermediate 30 was prepared in an overall yield of 44% in a 7-step procedure after y-butyrolactone underwent a-bromination, dehydrobromination, Diels-Alder reaction, aminolysis, benzylation, bromination and dehydrobromination, with the key step being the Diels-Alder reaction under harsh condition.

其中一个路线从γ-丁内酯38开始，连续经过α-溴化、脱溴化氢、Diels-Alder反应、胺解、苄基化、溴化和脱溴化氢共7步反应，制备了一个环己二烯衍生物30，总产率44％，关键步骤是高温高压下Diels-Alder反应。

Effects of Temperatures on Storability of Postharvest Sweetsop Fruit;2. Experiment was conducted with sweetsop cultivar" African Pride"Annona squamosa L.

以&非洲骄傲&番荔枝果实为试材，研究了1-MCP(1-甲基环丙烯)处理对冷藏(15℃)番荔枝果实贮藏效果和生理变化的影响。

Natamycin is an antimycotic food additive prodced by Stepomyces natalensis which used to protect food from mould and yeast growth.

项目简介：纳他霉素是一种多烯大环内酯类抗真菌抗生素，可用其对食品表面进行处理以增加食品的保质期，但不影响食品的风味和口感。

Cyclooxygenase is a key enzyme in the metabolic process of arachidonic acid.

环氧化酶是花生四烯酸代谢过程中的重要限速酶，其中COX-2是诱导型酶。

Water,butylene glycol,cyclomethicone,VP/VA copolymer,glyceryl stearate,glycerin,ppg-15 stearyl ether,titanium dioxide,propylene glycol,cetyl alcohol,citrus aurantium dulcisfruit extract,saccharide isomerate,biosaccharide gum-1,ethoxydiglycol,peg-40 stearate,glycyrrhiza glabraroot extract,morus bombycis root extract,potassium cetyl phosphate,phenoxyethanol,c12-20 acid peg-8 ester,triethanolamine,prunus amygdalus dulcis oil,carbomer,caprylyl glycol,caffeine,disodium edta,methylparaben,chondrus crispus,butylparaben,iris germanica root extract,pentadecalactone,sodium polyacrylate,ethylparaben,sodium hyaluronate,peg-8,propylparaben,citric acid,chlorhexidine digluconate,tocopherol,ascorbyl palmitate,ascorbic acid

水，丁烯二醇，环甲硅脂，VP/VA共聚物，甘油基硬脂酸，甘油，ppg-15 stearyl ether，二氧化钛，丙二醇，十六烷基醇，橙子萃取物，天然异构寡糖， biosaccharde gum-1，乙基氧基乙二醇，聚乙二醇- 40硬脂酸，甘草根提取物，桑白皮根萃取，钾十六烷基磷酸盐，苯氧乙醇，c12-20 acid peg-8 ester，三乙醇胺，甜杏仁油，高分子胶，辛乙二醇，咖啡因，乙二胺四乙酸二钠，对羟基苯甲酸甲酯，卡拉胶，对羟基苯甲酸丁酯，鸢尾花根萃取， pentadecalactone ，聚丙烯酸钠，羟苯乙酯，透明质酸钠，聚乙二醇- 8，羟苯丙酯，柠檬酸，洗必泰葡萄糖酸盐，维生素E，维生素C棕榈酸酯，抗坏血酸

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。