脱氧

Mustelidae ; deoxyribonucleic acid ; population ; characteristics/Mink ; DNAfingerprinting

鼬科；脱氧核糖核酸；群体；特征／水貂； DNA指纹

It was reported that about 86% of DNA hypermethylation is detected in acute myelogenous leukemia.

目前国际上研究较多的去甲基化药物是5-杂氮-2-脱氧胞嘧啶(5—aza—CdR)。

Glioma is still one of refractory disease in the neurosurgical field; the development of new primary and adjuvant treatment is vital. Recently, the gene therapy of glioma is developed rapidly and there are many methods about the gene therapy that include: suicide gene therapy, immunologic gene therapy, drug resistangce gene therapy, angiostatin gene therapy and so on. The sucide gene therapy is the most potential approach of antitumer, these nonmammalian genes encode enzyme that convert nontoxic prodrugs into highly toxic metablites. Cells transfected with suicide genes are targeted for specific negative selection, witch can be induced by administrtion of the corresponding produg. Among the enzyme/produg combinations, two of the best characterized system are herpes simplex virus thymidine kinase /ganciclovir and Escherichia coli cytosine deaminase /5-flourocytosine (5-FC). The formor can convert the antiviral nucleoside analogs acyclovir , ganciclovir to their nucleoside monophosphate derivatives, the monophosphate forms are subsequently phosphorylated by endogenus cellular kinases to triphosphates, these molecules are potent inhibitors of DNA synthesis.

近年来脑胶质瘤的基因治疗发展迅速，应运而生的方法有自杀基因、免疫基因、多药耐药基因以及抗血管生成基因等，其中自杀基因被认为是最有前景的基因治疗方法，它又称病毒介导的酶／药物前体疗法，是利用转基因技术将哺乳动物细胞中所不含有的自杀基因转入到哺乳动物肿瘤细胞中，该基因表达的产物可将无毒的药物前体转化为毒性药物，从而选择性杀伤该肿瘤细胞，常用的自杀基因有单纯疱疹病毒-胸苷激酶基因和大肠杆菌胞嘧啶脱氨酶基因，前者催化无毒性抗病毒核苷类似物如丙氧鸟苷、无环鸟苷等成为单磷酸核苷衍生物，然后在内源性细胞激酶作用下转化为具有明显毒性的三磷酸核苷，作为DNA合成链的终止剂和DNA合成酶的抑制剂，干扰细胞DNA的合成；后者编码的胞嘧啶脱氨酶可催化5-氟胞嘧啶（5-FC）脱氨成为5-氟尿嘧啶（5-FU），然后代谢为有毒性的5-氟尿嘧啶-5′三磷酸（5-FUTP）和5-氟-2′脱氧尿嘧啶-5′磷酸（5-FdUTP），5-FUTP通过与UTP竞争性结合而抑制mRNA和tRNA的合成，5-FdUTP则作用于胸苷合成酶，导致TMP衰竭而阻止DNA的合成，最终诱导肿瘤细胞凋亡。

Deoxyribonucleases ; Isolation and purification ; Oligochaeta

脱氧核糖核酸酶类；分离和提纯；寡毛目

Carbohydrates are made of simple sugars, proteins are made up of 20 amino acids, and nucleic acids are compose of oxy- and deoxy- nucleic sugars and 5 base pairs.

其中碳水化合物都是由单糖构成的，蛋白质是由20种氨基酸构成的，核酸是由核糖、脱氧核糖、和5种碱基构成。

The tower-type oxygenate system is a produce based on absorbing and digesting the foreign technology.

塔式脱氧水制备系统是在国外技术基础上加以吸收消化而开发的一种产品。

TyPe II collagen induced arthritisln the rat ank1e joint andoVathumin as antigen induced arthritis WA in the rabbit knee joint wereestab1ish2 Qualitative evaluation of me in skin, muscle, synovium, cedilagearound joint and blood was performed by OMA3 The CIA rats were treated on day 7 after hind paw swelling and erythemaAnimals were injected intravenously with ase at a dose of 10mg/kg,tWenty minuots 1ater, one ankle of the rats random1y assigned was exPosedlaser irradiation at l00J/cm fOr l000 seconds, and another ankle wasM grouP wihout laser The other two groups is unmanipulatedcontrol group and untreated CIA group Bimaleolar ankle widthmeasuremellts were taken in all animals every tWo days using amicrometer The histopathology of the ank1e Joint was assessed at day 21after disease onset4 The pro1iferating cell nuclear antigen WCNA of CIA treated by PDT andthe HMME group without laser was doterdrined by immunohistochemiStry5 The AfA rabbits were treated on day 7 after knee swelling and erythemaThe theraPy invo1ved lntravenous injection of l0mg/kg HMME, fOl1owedby 20 minues period in dim light, and transdermal light treatment with\l00 J/cm2 fOr l000 seconds The inner sides of the treated Anees wereirradiated at first, and then the outer side did 24 hours later, the synovialtissue of the Anees joint were removed and in situ cel1 aPoptosis wasdetCCted With tednal deoxync1eotidyl transferase-mediated dUTP nickend labelingR6suIt8:l The pathologic changes of CIA and AIA include subsynovial inflammation,opovial hyPerplasia, pannus formation, cartilage and bone destructionresemble RA.2 The studies demonstrated that there are different uptake of HMME withinskin, muscle, synovium, cartilage and b1ood, and the synovium cou1draPidly uPtake more ase than skin and cartilage at the firSt 30 minuesaller intravenous injection of HMME3 The bimaleolar anke width had no different among PDT treated group,H group withollt 1aser and untreated CIA group But hlstologicalevaluation showed statiStical1y significallt reductions in synovialhyperplasia, pannus formation and cart1lage reosion, bone destruction andtotal score in PDT treated group4 Image analysis showed that the ratlo bforeen the areas of the coufltedobect to that of the entire area in PDTtreated grOup is lower than that in conirol group, but the integrated oPticaldensity had no different between the two groups5 Imape analysis showed that the ratio between the area of the countedobject to that of the e

治疗组在大鼠出现踝关节红肿后1周，炎症达到高峰时进行PDT治疗。随机治疗大鼠一侧的踝关节，另。2。一一侧作单纯HMME 对照。治疗方法是大鼠麻醉后尾静脉注入 HMME10ngkg，20分钟后踝关节照光，激光波长627.sum，功率密度 100mwcm'，照射时间1000秒，能量密度100）／。治疗后避光喂养72 小时。隔日一次测量大鼠的踝关节左右横径，治疗后两周取关节进行病理d 观察。 4。大鼠CIA模型用上述方法进行PDT治疗后，治疗组和单纯HMME 组用兔疫组化SP法检测石蜡切片的核增殖抗原。 5。兔AIA模型在关节炎出现第七天进行PDT治疗，随机治疗一侧膝关节，另一侧作自身对照。兔耳静脉注入I'arrainrelomg／Kg，20分钟后，膝关节用金蒸气激光照射，激光能量密度100）儿旷。24 ／J'时后取膝关节滑膜作病理检查，并用脱氧核昔酸末端转移酶介导的缺口末端标记法原位检测凋亡细胞。结果： 1。模型观察：CIA大鼠炎症高峰期滑膜下炎细胞浸润明显，滑膜细胞明显增殖，炎症达到高峰后二周，血管缀形成，并侵蚀和破坏软骨和骨， CIA模型病理改变与人类RA相似。兔AIA模型膝关节滑膜病理可见滑膜细胞增生，滑膜下炎细胞浸润，也与人类RA滑膜改变相似。 2。关节周围组织中光敏剂含量的测定结果表明，各组织对HMME 的吸收速度和吸收量不同，荧光值一时间曲线不同，滑膜组织比皮肤和软骨对 HMME的吸收多，在 2 0分钟时即有明显差异。 3.PDT对CIA模型的治疗结果表明：PDT治疗后关节炎组、单纯 HMME组和治疗组踝关节左右横径统计学检验差异没有显著性，但病理评分PDT治疗组滑膜增生、血管资形成及软骨破坏、骨破坏和总分比关节炎对照组和HMME对照组好，统计学检验差异有显著性。。3＿军医进修学院硕士学位论文中文摘要 4.PDT治疗组PCNA阳性细胞较对照组少，图像分析结果表明面密度（阳性染色的面积总和与统计视野面积的比值）治疗组小于对照组，统计学检验差异有显著性。。 5.PDT治疗组凋亡阳性细胞较对照组明显增多，图像分析结果单位视野内阳性细胞数和面密度PDT治疗组高于对照组，统计学检验差异有显著性。凋亡细胞核直径PDT治疗组较小，与对照组相比，统计学检验差异有显著性。结论：二。CIA、AIA的病理改变类似人类RA，可作为研究RA病因、发病机制、检查及治疗方法的模型。 2。各组织对HMME的吸收速度和吸收量不同，滑膜组织比皮。

PVC has excellent chemical and corrosion resistance to a broad range of fluids including water, deionized water, most mineral acids, bases, salts and paraffinic hydrocarbon solutions.

PVC具有极好的耐化学制品及耐腐蚀性能，广泛应用于多种流体，包括水，去离子水，大多数无机酸，脱氧核糖核酸基盐，盐，以及石蜡烃类溶液。

Any of various acids containing the peroxy group.

通过混合木碳使熔化的金属脱氧。

Deoxybenzoin(3) was prepareded by using the resorcinol and substituted phenylacetic as starting meterials in microwave-mediated.Then the compound(3) was reacted with acetic anhydride to produce(4).The compound(4) was hydrolyzed to convert compound(5) in the acid-mediated. The compound(5) was reacted with the 1,2-dibromo-ethane and 1,3-dibromo-propane in refluxed condition with acetone as solvent to give(6) or(7),respectively.Lastly,the title compounds were synthesized by refluxing(6) or(7) with 2-methyl-benzimidazole and potassium carbonate in acetone solution.

以取代苯乙酸和间苯二酚为起始原料，用微波辐射法合成脱氧安息香(3)，(3)与乙酸酐缩合生成2-甲基-7-乙酰氧基异黄酮(4)，(4)在酸性条件下水解生成相应的异黄酮(5)，化合物(5)分别与1，2-二溴乙烷和1，3-二溴丙烷反应生成(6)和(7)，化合物(6)和(7)再分别与2-甲基苯并咪唑偶合生成目标化合物。

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。