乳糖

Explain why an equimolar mixture of D- glucose and D-fructose formed by hydrolysis of sucrose is called invert sugar in the food industry.

解释为什么蔗糖水解产生的D-葡萄糖和D-果糖等摩尔的混合物在食品工业上称为转化糖？乳糖产生葡萄糖和半乳糖。

By means of GPC,IR,GC-MS,~(13)CNMR,~1HNMR,Methylation analysisetc,structural properties of PST-1 were identified as follows:The Mwof PST-1 was 3.44×10~6 Da and its optical rotation was _D~(20)=+0.110°(c0.1, H_2O); PST-1 constituted 8 simple sugars and the molar ratio was 2,4-Dimethoxy-Mannose:Rhamnose:Ara-binose:Xylose:Galactose:D-Galacturonic acid:Mannose:D-glucuronic acid=2%:5%:24%:9%:3%:1%:46%:10%;The chief bone of PST-1 was 1,3,6-linked-β-D-Man residue and the side chains contained Furanoid and Pyranoid residues.

结合GPC、旋光度测定、IR、GC-MS、~(13)CNMR、~1HNMR、高碘酸氧化法、Smith降解以及甲基化方法等分析测试方法，得到PST-1的单糖组成及结构表征，实验结果如下：红豆杉多糖PST-1是重均分子量为3.44×10~6 Da的支链多糖，旋光度为20D=+0.110~0(c0.1，H_2O)；PST-1单糖组成为：2，4-Dimethoxy-Mannose：Rhamnose：Arabinose：Xylose：Galactose：D-Galacturonic acid：Mannose：D-glucuronic acid=2％：5％：24％：9％：3％：1％：46％：10％；PST-1的骨架结构为：具有1，3，6-连接的β-D-甘露糖残基骨架，侧链分枝包括非还原末端的呋喃型α-L-阿拉伯糖残基、吡喃型α-L-阿拉伯糖残基、β-D-木糖残基、β-D-甘露糖残基、2，4-二氧甲基-β-D-甘露糖残基和α-D-葡萄糖醛酸残基；侧链的糖残基也可能存在2，5-二氧-取代呋喃型α-L-阿拉伯糖基、3-氧-取代的β-D-木糖残基、6-氧-取代的α-D-半乳糖醛酸残基、6-氧-取代的α-D-半乳糖残基、4-氧-取代的α-D-葡萄糖醛酸残基和2-氧-取代的α-L-鼠李糖残基，同时后者也可能穿插在主链上。

Galactosidase or melibiase is the enzyme of hydrolysising α-galactosis bonds, it is a exoglycosidase exist in nature widely.

半乳糖苷酶也称蜜二糖酶，是催化α-半乳糖苷键水解的酶类，是广泛存在于自然界的一种外切糖苷酶。

Coli are grown in the presence of lactose and glucose, the lac operon is under ___ control.

当大肠杆菌生长在既有葡萄糖又有乳糖的培养基上时，乳糖操纵元处于___控制

Lactose, melibiose, melitriose and galactose had inhibition against the activity but little effect of glucose.

乳糖、蜜二糖、棉子糖和半乳糖对酶活有抑制作用，葡萄糖对酶活几乎没有影响。

The reaction of iodide-potassium iodide was negative to evaluate that EGP was nonstarch polysaccharides, ulfate was 11.92%, content of the total polysaccharide was 83%, mainly including 70.13% D-galactose and 17.95% 3,6-anhydro-galactose.

不溶于有机溶剂，碘-碘化钾反应呈阴性，说明提取物为非淀粉性多糖，产率为20%，总硫酸基含量11.92%，总糖含量83%，主要由70.13%的D-半乳糖和17.95%的3，6-内醚半乳糖组成。

The cells ovoidal, while budding the wall structure is entroblastic. Reproduction by multilateral budding. It is not form ascospores or ballistospores; on malt agar red carotenoid pigments is synthesized.

该菌株细胞卵圆，出芽时胞壁结构为内分芽型，多端芽殖，不产生子囊孢子和掷孢子；在麦芽汁琼脂上产生红色胡萝卜素，颜色反应阳性，菌落平滑，有光泽，质地软而呈粘液状，不发酵任何糖，能同化麦芽糖、蔗糖、乳糖、棉子糖、松三糖和硝酸钾，能分解尿素；细胞水解物中含甘露糖、葡萄糖和半乳糖。

Sinensis could be divided into 5 stages, includi ng t he spermospore proliferation stage, the primary spermatocyte stage, the secondar y spermatocyte stage, the spermateliosis stage and the spermiotiliosis stage.

在整个精子发生过程中，N-乙酰半乳糖复合物出现于精原细胞期，并于精母细胞期发生明显的修饰和变化，精子形成期和成熟期没有N-乙酰半乳糖复合物的表达。

Results:Sorbaria sorbifolia extract significantly increased the activity of SOD in brain tissue, decreased the content MDA, inhibit the MAO activity. It was observed under microscope that Sorbaria sorbifolia could retrieve the degeneration of mitochondrion.

结果：珍珠梅提取物可提高D半乳糖所致大鼠脑组织SOD活性、降低MDA含量，抑制MAO活性；电子显微镜观察到珍珠梅提取物可以减轻D半乳糖导致的线粒体等超微结构的改变。

Soybean meal contains a significant quantity of NSP-enzymes 210 to 220 g/kg of dry matter, including 55% of pectins mainly in the form of rhamnogalacturonans, as well as oligosaccharides of the agalactoside series (raffinose, stachyose and verbascose.

豆粕中含有一定数量的非淀粉多糖NSP含量210-220 g/kg DM，包括以鼠李半乳糖醛酸聚糖形式存在的55%的果胶，同时豆粕中还含有α-半乳糖苷系列寡糖(棉子糖、水苏糖和毛蕊花糖。

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。