酶类

Being the preponderant microorganism in refrigerated raw milk,psychrophilic bacteria increase very swiftly and produce some cellular enzymes with high thermal stability such as lipases and proteases.

嗜冷菌作为冷藏原料奶中生长的优势菌群，在原料奶贮存过程中会大量繁殖，并产生及其耐热的脂肪酶和蛋白酶，这些酶类在高温处理后仍会有残留，并在奶制品储藏过程中继续分解其中的脂肪和蛋白质，导致产品的风味和质地产生变化。

Objectives: To study the relationship between matrix metalloproteinases and their inhibitors and the invasion and metastasis of human glioma, as well as the relationship between the expression of MMP-2 and TIMP-2 in human primary and recrudescent glioma and the grade of malignancy.

目的：探讨基质金属蛋白酶类与胶质细胞瘤浸润性生长之间的关系及其在胶质瘤复发中的作用，以及基质金属蛋白酶及其抑制因子(MMP-2、TIMP-2)的阳性表达与胶质细胞瘤病理分级及预后的关系。

Injured cells appear to require synthesis of some essential cell materials, that is, ribonucleic acid or enzymes before recovery is accomplished.

受杀伤的细胞似乎要合成一些必不可少的细胞物质，如核糖核酸或酶类，然后才能达到完全复原。

Injured cells appear to require synthesis of some essentialcell materials, that is, ribonucleic acid or enzymes before recovery isaccomplished.

受杀伤的细胞似乎要合成一些必不可少的细胞物质，如核糖核酸或酶类，然后才能达到完全复原。

Comparing with diabetes control group , the level of SOD and MDA increased obviously in 1.5 g/kg.d and 3.0g/kg.d Marine collagen peptide group P＜0.05 or P＜0.01 ,while the level of MDA and NO decreased markedly P＜0.05 or P＜0.01; the antioxygen capability did not change significatively in 0.75g/kg.d dose Marine collagen peptide.

鉴于糖尿病患者抗氧化应激功能失调与氧自由基反应增强和抗氧自由基酶类活性降低密切相关，本文就具有抗氧化活性和提高免疫力等功效的海洋胶原肽对2型糖尿病大鼠血清抗氧化应激指标表达的影响进行实验研究。

Comparing with diabetes control group , the level of SOD and MDA increased obviously in 1.5 g/kg.d and 3.0g/kg.d Marine collagen peptide group P＜0.05 or P＜0.01 ,while the level of MDA and NO decreased markedly P＜0.05 or P＜0.01; the antioxygen capability did not change significatively in 0.75g/kg.d dose Marine collagen peptide.

鉴于糖尿病患者抗氧化应激功能失调与氧自由基反应增强和抗氧自由基酶类活性降低密切相关，本文就具有抗氧化活性和提高免疫力等功效的深海胶原肽对2型糖尿病大鼠血清抗氧化应激指标表达的影响进行实验研究。

Sequence analysis and homology alignment showed that MD1 had 93% similarity with matK in maize chloroplast genome, a gene encoding maturase included in type Ⅱ intron splicing of RNA transcript; MD2 had 99% similarity with gene PP2C, encoding serine / threonine protein phosphatase type 2C in extremely drought tolerant Sporobolus stapfianus; and MD3 had 99% similarity with rice gene encoding metacaspase, belonging to aspartic acid specific cysteine caspases.

序列分析和同源性比对表明，MD1与玉米叶绿体基因组中编码参与RNA转录本Ⅱ型内含子剪切的成熟酶的matK基因有93%的相似性，MD2与极端耐旱的Sporobolus stapfianus的丝氨酸／苏氨酸2C型蛋白磷酸酶基因PP2C的相似性达99%，MD3与属天冬氨酸特异性半胱氨酸蛋白酶类的水稻metacaspase基因有99%的相似性。

Results of sequence and homology analysis show that MD 1 has 97% similarity with mark in maize chloroplast genome,a gene encoding RNA maturase involved in group Ⅱ intron splicing of RNA transcript;MD2 has 99% similarity with the gene serine/threonine phosphorylase 2C in Sporobolus stapfianus;and MD3 has 99% similarity with rice the gene encoding metacaspase,an arginine/lysine-specific cysteine protease.

序列分析和同源性比对表明，MD1与编码成熟酶的玉米叶绿体基因matK有97%的相似性，MD2与极端耐旱植物Sporobolus stapfianus编码丝氨酸/苏氨酸蛋白磷酸酶的PP2C基因有99%的相似性，MD3与属精氨酸/赖氨酸特异性半胱氨酸蛋白酶类的水稻metacaspase酶基因有99%的相似性。根据MD2片段序列，结合电子克隆和RT-PCR方法，克隆出一条1731 bp的全长cDNA序列，它编码388个氨基酸。

The temperature at whiCh the treatment is Carried out may, dependent on the tannase type, vary from 20 to 80 C.

处理的温度可因丹宁酶类型的不同而在20-80摄氏度之间变化。

Suicide gene therapy is a new experimental form of cancer chemotherapy that is currently being evaluated in human trials. Cytosine deaminase is an enzyme found in a variety of bacteria and fungi where is capable of deaminating cytosine to uracil.

将某些细菌及病毒中特有的药物敏感基因转导入肿瘤细胞，使肿瘤细胞产生某些酶类，将原来无毒的抗病毒药物或化疗前体药物代谢转化成细胞毒性产物而杀伤宿主细胞，这种使肿瘤细胞自杀的基因称为&自杀基因&。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。