“江边一碗水”总木脂素的抗肿瘤作用及一般毒性的研究

为评价"江边一碗水"总木脂素对H22荷瘤小鼠的肿瘤抑制作用和相关毒性,用SPF级雄性小鼠腋下接种肝癌H22瘤株建立了移植性肝癌H22小鼠模型,观察了不同剂量的"江边一碗水"总木脂素给药10 d后对荷瘤小鼠的肿瘤抑制率、体重、免疫器官指数及血尿常规、肝肾功等的影响.结果表明:50,100,200 mg/kg"江边一碗水"总木脂素的抑瘤率分别为44.9%,54.8%和62.1%."江边一碗水"总木脂素对H22小鼠体重、免疫器官指数、造血系统、肝肾功能等生理生化指标无明显影响.故"江边一碗水"总木脂素具有较显著的抗肿瘤作用和较低的毒性,是其抗肿瘤的药效物质基础.     

小鼠主要组织相容性复合体在鼠肝癌H_(22)中的表达

目的观察小鼠主要组织相容性复合体(H-2)在小鼠移植性肝癌的核酸及蛋白水平的表达,初步探讨动物移植性肿瘤的可移植机制。方法以小鼠移植性肿瘤H22为实验材料,BALB/c小鼠为荷瘤动物,以荷瘤小鼠肝脏为参照,应用RT-PCR技术检测H-2分子在mRNA水平的表达,以免疫组化技术检测在蛋白水平的表达。结果在小鼠移植性肝癌H22中,H-2分子在核酸水平的表达无异常,而在蛋白表达水平出现下调。结论鼠肝癌H22的H-2分子在蛋白水平的表达下调可能与肿瘤的可移植性有关。     

熊果酸对H22荷瘤小鼠抗肿瘤及免疫调节作用

目的 探讨熊果酸（UA）对H22荷瘤小鼠抗肿瘤作用及免疫功能的影响.方法 皮下移植建立H22荷瘤小鼠模型,腹腔注射不同剂量UA,检测抑瘤率和免疫器官指数,MTT法检测脾脏T、B淋巴细胞增殖能力,流式细胞术检测CD4＋、CD8＋T细胞亚群含量及比例,ELISA法检测血清细胞因子IL-2、IL-4和TNF-α的表达量.结果 UA对小鼠皮下移植性肿瘤H22有显著的抑制作用,可降低免疫器官中异常增大的脾指数,增强脾脏中T、B淋巴细胞增殖能力,提高淋巴细胞亚群CD4＋T细胞表达及CD4＋/CD8＋T细胞亚群比例,促进血清IL-2、TNF-α表达,降低IL-4表达.结论 UA可抑制小鼠肝癌H22肿瘤生长,体内可以提高荷瘤小鼠的免疫能力,其抗肿瘤作用可能与机体的免疫调节作用相关.     

化胃舒颗粒体内抗肿瘤作用的实验研究

摘要: 目的探讨化胃舒颗粒对小鼠移植性肿瘤的抑制作用。方法以S180 肉瘤和H22 肝癌作为实验瘤株,观察化胃 舒颗粒对S180 小鼠肉瘤的抑瘤率及对H22 肿瘤小鼠生存期的影响。采用小鼠移植性肿瘤S180 实体瘤模型,观察化胃舒 颗粒与环磷酰胺( CTX) 联用对S180 实体瘤小鼠的白细胞数及抑瘤率的影响。结果化胃舒颗粒能阻止S180 肿瘤生长, 小鼠肿瘤抑制率在30%以上; 化胃舒颗粒能明显延长H22 肿瘤小鼠的生存时间; 化胃舒颗粒能抑制由环磷酰胺( CTX) 引 起的S180 实体瘤小鼠血液中白细胞总数的减少,从而增强环磷酰胺( CTX) 的抑瘤作用。结论化胃舒颗粒对S180 肉瘤 和H22 肝癌荷瘤小鼠有明显的抗肿瘤作用,与环磷酰胺( CTX) 合用有显著的减毒增效作用。     

广西藤茶提取物TTF抗肿瘤作用的实验研究

观察广西藤茶提取物（简称TTF）及其含药血清抗肿瘤作用，采MTT法，观察含药血清对肉瘤细胞（S180）、肝癌细胞（H22）、白血病细胞株（L1210）细胞增殖的抑制作用；体内试验以荷瘤小鼠实体瘤重、抑瘤率为实验指标评价TTF对S180移植性肉瘤的抑制作用；以荷瘤小鼠存活时间为实验指标评价TTF对H22移植性腹水癌的抑制作用。实验结果表明含药血清在体外对S180细胞、H22细胞和L1210细胞有明显的抑制作用，体内能明显抑制实体瘤重和延长荷瘤小鼠存活时间。证明TTF体内及含药血清具有一定抑制S180、H22、L1210肿瘤细胞增殖及S180、H22诱发的移植性肿瘤作用．     

白英抗肿瘤作用的实验研究

探讨白英(solanum lyratum thunb)的抗肿瘤作用,采用MTT法观察白英含药血清对人癌A2780、Hela、SGC-7901细胞的体外抑制作用.采用体内试验以荷瘤小鼠实体瘤重、抑瘤率为实验指标评价白英对S180移植性肉瘤的抑制作用;以荷瘤小鼠存活时间为实验指标评价白英对H22移植性腹水癌的抑制作用.白英含药血清均能明显抑制体外培养的A2780、Hela、SGC-7901细胞的生长;白英能明显抑制实体瘤重和延长荷瘤小鼠存活时间.说明白英对体外培养的A2780、Hela、SGC-7901细胞有明显的抑制作用;具有一定抑制S180、H22诱发的移植性肿瘤作用.     

澳洲茄胺盐酸盐对小鼠肝癌H22抑制作用研究

目的 研究观察澳洲茄胺盐酸盐对移植性实体型肿瘤小鼠肝癌H22的瘤重抑制率.方法 本项研究采用肿瘤细胞悬液接种法制备小鼠移植性实体型肿瘤H22动物模型.腹腔注射给药,连续10 d.给药结束后,解剖小鼠,取瘤称质量,进行统计学处理及分析,观察药物作用,连续3次重复实验.结果 经过研究发现:澳洲茄胺盐酸盐对移植性实体型小鼠肝...     

青蒿琥酯配伍丝裂霉素抗肿瘤作用的实验研究

目的：探讨青蒿琥酯配伍丝裂霉素（MMC）抗肿瘤作用,为临床肿瘤化疗提供用药选择。方法：采用体内试验以荷瘤小鼠实体瘤重、抑瘤率为实验指标评价青蒿素配伍丝裂霉素（MMC）对S180移植性肉瘤的抑制作用;以荷瘤小鼠存活时间为实验指标评价青蒿琥酯配伍丝裂霉素（MMC）对H22移植性腹水癌的抑制作用。结果：青蒿琥酯配伍丝裂霉素（MMC）能明显抑制实体瘤重和延长荷瘤小鼠存活时间。结论：青蒿琥酯配伍丝裂霉素（MMC）具有一定抑制S180、H22诱发的移植性肿瘤作用。     

藏药-唐冲那保抗小鼠移植性肝癌(H22)的研究

目的:对我国青海玉树地区民间藏医治疗肿瘤验方的提供,治疗肿瘤的主味藏药玉树莨菪(译音:唐冲那保)进行了抗小鼠移植性肝癌(H22)研究。方法:建立小鼠肝癌(H22)模型,随机将动物分成样品2个剂量组、蒸馏水阴性对照组及环磷酰胺(CTX)阳性对照组。每组9-10只动物,高剂量组重复1批实验。接种24h开始给药,样品组、阴性对照组灌胃给予,给药容量为0.2ml/10g体重。阳性组腹腔注射0.1ml/10g体重。所有动物每天给药1次,连续10d。并隔日称体重一次,根据体重调整给药量。结果:玉树莨菪提取物对小鼠移植性肿瘤H22均有明显的抑制作用,抑制率达41.27%,且重复性较好,对小鼠移植性肿瘤H22抑制率为26.39%。结论:根据抗肿瘤药物筛选规程疗效评价,中草药抑制率大于30%,并经统计学处理有显著性差异,重复疗效稳定,则评定此药有一定疗效。表明玉树莨菪提取物有一定的抗肿瘤疗效。     

扶正升血颗粒对荷H22瘤小鼠免疫功能影响的实验研究

目的:通过观察扶正升血颗粒对荷H22瘤小鼠免疫器官(胸腺、脾脏)重量、脾淋巴细胞增殖活性及细胞因子(IL-2)分泌的影响,探讨扶正升血颗粒对荷瘤小鼠免疫系统的调节作用.方法:采用荷H22(肝癌)实体瘤小鼠模型,用免疫器官重量法计算胸腺指数(TI)和脾脏指数(SI),用MTT比色法测定淋巴细胞增殖反应,用双抗体夹心ELISA法测定脾淋巴细胞培养上清液中IL-2的浓度.结果:扶正升血颗粒大、中、小剂量组荷瘤小鼠胸腺指数、脾脏指数均高于模型组,其中大剂量组TI、SI分别为18.9mg/10g、76.3mg/10g,较模型组分别增长36.0％、17.9％(p＜0.05);中剂量组TI为18.0mg/10g,较模型组增长29.5％(p＜0.05).扶正升血颗粒各剂量组荷瘤小鼠脾淋巴细胞增殖活性均高于模型组,以大剂量组作用最优,与模型组比较有显著性差异(p＜0.05).扶正升血颗粒各剂量组小鼠脾淋巴细胞培养上清液中IL-2的浓度均较模型组增高,大剂量组IL-2的浓度为61.6pg/ml,与模型组比较有显著性差异(p＜0.05).结论:扶正升血颗粒对荷H22瘤小鼠免疫器官胸腺、脾脏具有增重作用,能够增强脾淋巴细胞增殖活性,促进荷瘤小鼠细胞因子IL-2的分泌,表明扶正升血颗粒能明显增强荷瘤小鼠机体的免疫功能.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.