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Low molecular weight mannuronic acid, guluronic acid and κ carrageenan were prepared from algin and carrageenan by the acid hydrolysis method, and their weight average molecular weights and the distribution widths of molecular weight were determined by high performance gel permeation chromatography respectively.

本文以褐藻胶和κ-卡拉胶为原料通过酸水解分别获得了低聚的甘露糖醛酸、古罗糖醛酸和低聚κ-卡拉胶,并采用 HPGPC法测定了这 3种低聚糖的重均分子量。在此基础上再经硫酸酯化和成盐修饰制备了各自的硫酸酯碱式铝盐。

Propolis is a colloid substance comprised of the resin collected by bee from plant bud and twig, and the secretion of mandibular gland and the beeswax, which is greyish green or yellowish brown in color.

蜂胶是蜜蜂从胶源植物的新生枝芽处采集的树脂类物质,经过蜜蜂混入其上颚腺、蜡腺分泌物反复加工而成的胶状物质,多为青褐色、黄褐色。

Methods: During the April 2003 to December 2004, from the patients with different position colorectal cancer beyond Dukes C stage who were performed laparoscopic radical operation random draw 20 patients as experiment group, and from patients with different position colorectal cancer beyond Dukes C patients who were performed open radical operation 20 patients took randomly as contrast group. We draw thepatients blood about 5 ml from antecubital vein at the time before and after the operation about 30 minutes respectively, preserved the blood in deep hypothermia circumstance,cytrokeratin-20(CK-20) as the micrometastasis maker, using the RT-PCR technique,G3PDH as the intra-contrast gene, quantitatively detect the amounts of CK-20 in the blood with the gelatum imagery system and the computer analyzing software on the gelatum imagery system ,in order to compare the influence of the laparoscopic and the open operation on the micrometastasis.

在我院2003年4月—2004年12月间不同部位的临床分期在Dukes C期之内的接受了腹腔镜结直肠癌根治术结直肠癌患者中随机抽取20例作为试验组,另外在同期的接受开腹手术患者中随机抽取20例作为对照组,分别抽取术前30min和术后30min的肘前静脉血5ml,集中低温保存,以细胞角蛋白(cytekeratin-20)CK-20为微转移的标志物,应用RT-PCR技术,以G3PDH为内对照基因,应用凝胶成像系统及其计算机凝胶成像系统分析软件来定量检测手术前、后患者外周静脉血中CK-20含量,比较腹腔镜和开腹的手术方式对肿瘤微转移的影响。

Discussion on membrane formation mechanismBased on the Flory-Huggins theory, Phase equilibrium equations of PVDF/DMAc/water ternary system were wrote out, and the binodal and spinodal lines in the phase diagrams of the system were obtained via numerical calculation. Combined the kinetic description and the thermodynamic phase diagram, membrane formation process were analyzed, which prepared the theoretical foundation for the further membrane formation mechanism research.

论文主要从如下四个方面展开:(1)PVDF疏水膜成膜分相机理探讨基于Flory-Huggins理论推导了三元制膜体系凝胶分相组成的线性表达式,并通过&浊点法&测定了PVDF/N,N-二甲基乙酰胺/水/成膜体系的凝胶边界线组成,通过对实验数据的拟合,得到了简捷直观的线性表达式,ln(φ_1)/(φ_3)=bln(φ_2)/(φ_3)+a,误差小于3%。

The results indicate the membrane prepared in pure water coagulation bath exhibits fingerlike structure, with an increase of the volume fraction of ethanol in coagulation bath leads to a reduction of fingerlike cavities, and in ethanol/water coagulation bath of φ=40% exhibits spongelike structure; the melting points of the fingerlike and spongelike membrane increase by 3.9℃ and 3.5℃ compared to that of raw material respectively, and the crystallinity of the two type membranes increases by 16.1% and 13.5% respectively.

结果表明纯水凝胶浴中所成膜为指状多孔膜,随着凝胶浴乙醇体积分数的增加,膜指状大孔逐渐消失,在φ=40%的乙醇/水凝胶浴中转变为海绵状多孔膜;指状多孔膜和海绵状多孔膜熔点相对于原料分别提高了3.9℃和3.5℃,而结晶度相对于原料分别提高了16.1%和13.5%。

The results indicate the membrane prepared in pure water coagulation bath exhibits fingerlike structure,with an increase of the volume fraction of ethanol in coagulation bath leads to a reduction of fingerlike cavities,and in ethanol/water coagulation bath of φ=40% exhibits spon...

结果表明纯水凝胶浴中所成膜为指状多孔膜,随着凝胶浴乙醇体积分数的增加,膜指状大孔逐渐消失,在φ=40%的乙醇/水凝胶浴中转变为海绵状多孔膜;指状多孔膜和海绵状多孔膜熔点相对于原料分别提高了3.9℃和3.5℃,而结晶度相对于原料分别提高了16.1%和13.5%。

The trivalent chromium passivation film based on zincate plating obtained has compact structure with no obvious crack, and excellent anticorrosion performance. Different compositions are detected from the surface to inner film, the surface mainly contains Cr2O3-Cr3-ZnO compound, the inner (1030 nm to surface) composes of Cr2O3-ZnO-Zn.The forming process of passivation film possibly consists of four steps which are zinc dissolution, basic area appearance, gelatiniform film forming and converting to passivation film.

结果表明:锌酸盐镀锌层的三价铬钝化膜表面结构致密、无明显裂纹,具有较好的耐腐蚀性能;这种钝化膜表层与里层的组成不同,表层的组成为Cr2O3-Cr3-ZnO共混物;里层(离表层10~30 nm处)的主要组成为Cr2O3-ZnO-Zn共混物;钝化膜的成膜过程可能包括镀锌层的溶解、碱性薄层的形成、胶状膜的形成和胶状膜转化成钝化膜4个步骤。

At histopathologic analysis, neuronal tumors are usually classified as pure neuronal cell tumors (gangliocytoma, Lhermitte-Duclos disease , central neurocytoma) and mixed neuronal-glial tumors (ganglioglioma, desmoplastic infantile ganglioglioma, dysembryoplastic neuroepithelial tumor, ganglioneuroma).

根据组织病理学的分析,神经元肿瘤通常被分为:单纯的神经元细胞肿瘤(神经节细胞瘤,Lhermitte-Duclos 病〔发育不良性小脑神经节细胞〕瘤),中枢神经细胞瘤)和混合性的神经元-胶质肿瘤(神经节神经胶质瘤,成结缔组织性婴儿节细胞胶质瘤,胚胎发育不良性神经上皮瘤,神经节瘤)。

the fibroblasts are activated in collagen synthesis in active keloid. The enhanced collagen synthesis by fibroblasts is a critical factor leading to the overabundant collagen accumulation in keloid.

结论在活跃增生的瘢痕疙瘩中,成纤维细胞胶原合成功能处于活化状态,胶原合成增加是瘢痕疙瘩中胶原过度积聚的重要原因。

As the ferroan sparry carbonate cements were formed later and the sandstone reservoir was on the whole not subjected to any other constructive diagenesis, the development of carbonate cements must have played an apparent controlling effect on reservoir characteristics.

由于含铁碳酸盐胶结物形成时代晚而且储层未受到其他建设性成岩作用的明显改造,晚期碳酸盐胶结物含量和面孔率呈互相补偿的关系,表明了晚期碳酸盐胶结物对储层物性的破坏作用。

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As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。