糖酮

Based on the molecular structures, sugar alcohols can be classified into Mono sugar alcohol (such as erythritol, xylitol, sorbitol and mannitol ) and Disaccharide alcohol (such as maltitol,lactitol and isomaltitol).

糖醇是醛糖或酮糖的羰基经氢化还原成羟基的多元醇；按其结构可分为单糖醇(如四元赤藓糖醇、五元木糖醇、六元山梨糖醇和甘露糖醇)，双糖醇(如麦芽糖醇、乳糖醇、异麦芽酮糖醇)。

Structure Design and Modification of Mannitol-polylactide Tissue Engineering Materials;2. Based on the molecular structures, sugar alcohols can be classified into Mono sugar alcohol (such as erythritol, xylitol, sorbitol and mannitol ) and Disaccharide alcohol (such as maltitol,lactitol and isomaltitol).

糖醇是醛糖或酮糖的羰基经氢化还原成羟基的多元醇；按其结构可分为单糖醇(如四元赤藓糖醇、五元木糖醇、六元山梨糖醇和甘露糖醇)，双糖醇(如麦芽糖醇、乳糖醇、异麦芽酮糖醇)。

By this reaction, an aldose is converted into another aldose and the corresponding ketose, and a ketose is converted into the corresponding two aldoses.

单糖的异构化涉及羰基和相邻近的羟基，通过这个反应，一种醛糖转化为另一种醛糖，和相对应的酮糖，一种酮糖转化为相对应的两种醛糖。

Monosaccharides are classified according to (1) the number of carbon atoms present in the molecule and (2) whether they contain an aldehyde or keto group, thus a monosaccharide containing six carbon atoms is called hexose; a monosaccharide containing an aldehyde group is called aldose; and one containing a keto is called a ketose.

单糖的分类按照（1）分子中碳原子的数目（2）是否含有一个醛基或酮基，因此一个单糖含有6个碳原子叫做己糖；一个单糖含有醛基叫醛糖；含有酮基叫酮糖。

Glucose an aldohexose, exists as D and L forms. The furthest asymmetric carbon from the aldehyde group is C-5. D-glucose is called D because the configuration of the atoms bonded to C-5 is the same as for D-gly- ceraldehyde. Similarly D-fructose﹙a ketohexose﹚ is designated D because the configuration

环状结构：醛基或酮基跟一个羟基反应共价闭合，形式上一个糖的醛基和羟基反应生成了一个半缩醛，而一个酮基与一个羟基反应生成一个半缩酮，在同一分子内这个反应能进行，单糖的开链式形成了糖环，葡萄糖环形成一个六碳环。

The correlations of eleven floral and fruit quantitative traits of Liriodendron interspecific hybrids(L. chinense×L. tulipifera) and its parent species were analysized.The aglycone and glycoside of flavonoid and carotinoids of perianth segment in the three groups were studied qualitatively and quantatively by high performance liquid chromatography.The results were as followed: The aglycone such as cyanidin, 6-hydroxyflavone and trans-chalcone and the glycoside such as glucose, rhamnose and galactose were discovered in Liriodendron interspecific hybrids and Liriodendron chinense,carotinoids such as lycopene and β-carotene were also discovered.

本文对鹅掌楸、北美鹅掌楸和杂交F_1的花果共11 个数量性状进行分析，并应用高效液相色谱对上述三大类群花被片类黄酮糖苷配基和结合糖及类胡萝卜素进行了定性和定量研究，结果如下：鹅掌楸和杂交鹅掌楸花被片类黄酮糖苷配基为花青素、6-羟基黄酮和反式查尔酮，糖苷配基结合糖为葡萄糖、鼠李糖和半乳糖；类胡萝卜素为β-胡萝卜素和番茄红素。

objective:to determine total flavonoids content in the leaves of acer saccharum.methods:we determined total flavonoids contents in leaves of acer saccharum by ultraviolet and visible spectrophotometry.results:the flavonoids content was 1.035mg/g in the leaves of acer saccharum.conclusion:the flavonoids content is rich in the leaves of acer saccharum and the leaves have pharmic value.

目的：本文对糖槭叶中的总黄酮含量进行测定。方法：采用紫外-可见分光光度法对糖槭叶中总黄酮含量进行测定。结果：糖槭叶中总黄酮含量为1.035mg/g。结论：糖槭叶中含有丰富的黄酮类化合物，具有可观的药用开发价值。

Monosaccharide Isomerization Simple aldoses and ketoses containing the same number of carbon atoms are isomers of each other; that is, a hexose and a hexulose both have the empirical formula (C6 H1206 )and can be interconverted by isomerization.

单糖异构化含有相同数目碳原子的单醛糖和酮糖互为同分异构体，也就是说一个已醛糖和一个已酮糖都符合经验分子式C6 H1206，并且可通过异构化作用相互转化

Trioses （n=1）, tetroses （n=2）, pentoses （n=3）, hexoses （n=4） to distinguish aldoses from ketoses, ketoses are designated as"-uloses."

例如丙糖（trioses，n=1）、丁糖（tetroses，n=2）、戊糖（pentoses，n=3），己糖（hexose，n=4），为区别醛糖和酮糖，就把酮糖后缀加成&-ulose&。

Consequently,in this study we introduced genes that encode the xylose isomerase and xylulokinase precisely under the control of a strong,constitutive glyceraldehydes-3-phosphate promoter by PCR-mediated overlap extension,which is in charge of xylose assimilation;and also we introduced genes that encode the transaldolase and transketolase precisely under the control of enolase promoter,which is in charge of xylose utilization,then transformed plasmid with the two operons into Z.

因此，本文通过代谢工程手段，将负责木糖代谢转化的木糖异构酶基因和木酮糖激酶基因置于强组成型启动子3-P-甘油醛下；同时将负责木糖转化利用的转醛醇酶和转酮醇酶基因置于强组成型启动子烯醇酶下，通过电转的方式将上述四个基因转入到Zymomonasmobilis CP4中，从而在运动发酵单胞菌中构建起一套完整的木糖代谢途径。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。