被动吸烟对小鼠生长性能及部分血液生理指标的影响

研究了被动吸烟对小鼠生长性能及血液系统的影响.将小鼠分为雌、雄对照组和处理组,处理组小鼠进行烟熏处理,对照组常规饲养不做任何处理,120 d后进行生长性能、血常规和血液流变学指标测定.结果显示:接受烟熏120 d后,雌雄小鼠的体质量和体质量增长量均显著低于同性别对照组小鼠(P＜0.01和P＜0.05),且雌性处理组小鼠体质量和体质量增长量极显著低于雄性处理组小鼠(P＜0.01);雌雄性处理组小鼠的红细胞数、血小板数和血红蛋白含量显著高于雌雄性对照组小鼠(P＜0.01和P＜0.05),但白细胞数没有统计学差异;雌雄性处理组小鼠的血浆粘度显著高于对照组小鼠(P＜0.01),但全血粘度没有显著差异.以上结果提示被动吸烟可减缓小鼠的生长,改变小鼠的血常规指标和血浆粘度.     

激素敏感脂酶(HSL)基因敲除小鼠认知行为的研究

目的:评估HSL基因敲除小鼠的学习记忆功能.方法:采用经典的Morris水迷宫实验,测试三种基因型小鼠的认知行为变化.结果:三种基因型小鼠的潜伏期几乎都逐渐缩短,雄性正常小鼠的潜伏期在1～2天,明显地短于HSL敲除小鼠(P<0.01);雌性正常小鼠的潜伏期在第3～5天,明显地短于HSL敲除小鼠(P<0.01),随后几天都无显著差异.第8天撤去平台,小鼠跨越原平台位置的次数无显著差异.结论:HSL敲除的小鼠都存在明显的认知水平功能障碍,雄性小鼠在前期差异显著,雌性小鼠在中期差异显著,但给予适当的学习训练后都能达到正常小鼠的认知水平.     

牛奶乳清液对小鼠学习记忆能力的影响

以昆明小鼠为研究对象,应用小鼠Y型迷宫实验的方法,以环磷酸腺苷(cAMP)为阳性对照,以达标所需训练次数/天数(TN/TD)、正确反应率(CRR)、全天总反应时间(TRT)、主动回避率(AAR)为评价指标,开展不同浓度牛奶乳清液对小鼠学习记忆能力影响的研究。结果表明:阳性对照较空白对照组可显著降低小鼠TN(P0.05),灌胃半个月后可显著降低小鼠TRT并显著提高AAR(P0.05),并且灌胃一个月以后对小鼠CRR有明显升高作用(P0.05);牛奶乳清液较空白对照组可显著降低小鼠TN/TD(P0.05),灌胃半个多月后可显著升高小鼠的CRR和AAR,显著降低小鼠TRT(P0.05);与阳性对照组相比较,牛奶乳清液对小鼠CRR影响不显著(P0.05),但可显著降低小鼠TN/TD,显著升高AAR(P0.05),对于灌胃2个月小鼠的TRT降低效果更好,而且均以3/4倍稀释的牛奶乳清液效果最佳。因此,牛奶乳清液具有一定促进小鼠学习记忆能力的作用。     

P407 诱导和脂肪乳剂建立小鼠高血脂模型的比较研究

摘要: 目的比较P407( 泊洛沙姆) 和脂肪乳剂的小鼠高血脂模型的特点。方法采用灌胃法给予小鼠脂肪乳剂,腹腔注射法给予小鼠P407,之后测血清中的胆固醇( TC) 、甘油三酯( TG) 、高密度脂蛋白( HDL-C) 和低密度脂蛋白( LDL-C) 。结果脂肪乳剂造模后小鼠TC、LDL-C 显著升高,TG 显著降低,HDL-C 的变化没有显著性。P407-1d 组的小鼠TC、TG、LDL-C 显著升高,HDL-C 显著下降,符合临床典型高血脂的特征。结论用P407 建立小鼠高血脂模型更快速,更接近临床高血脂症。     

自发性基因突变SCD1-/-小鼠主要脏器参数、血液生理生化指标的观察

目的 探讨SCD1基因缺失对小鼠脏器参数,血液生理生化指标的影响。方法 选取8周龄SCD1-/-小鼠及其杂合子SCD1+/-小鼠,称取体质量及主要脏器,观察其脏器系数。比较不同周龄SCD1-/-小鼠及其杂合子SCD1+/-小鼠的血液细胞学和生化指标,观察其变化特点。结果 8周龄SCD1-/-小鼠与杂合子小鼠比较肝脏系数显著升高(P<0.05)。6～8周龄SCD1-/-小鼠与杂合子小鼠的血液细胞学指标相比RBC、MPV、PCT显著降低(P<0.05),MCV、MCH、RDW、PDW、PLT、LYM显著增高(P<0.05);血清生化指标ALB、TC、TG极显著降低(P<0.01),ALP、ALT、UA极显著增高(P<0.01)。16～18周龄SCD1-/-小鼠与杂合子小鼠的血液细胞学指标MCHC、PLT、PCT相比极显著降低(P<0.01),RDW、HCT、MCV都极显著增高(P<0.01);血清生化指标ALP、TC极显著降低(P<0.01)。结论 SCD1基因缺失对小鼠鼠脏器参数、血液生理生化指标都有一定的影响。     

地西泮和戊巴比妥钠联合使用对小鼠麻醉的效果观察

目的通过给小鼠注射地西泮和戊巴比妥钠的方法,探讨复合麻醉对小鼠的麻醉效果。方法将ICR小鼠随机分为对照组和试验组。对照组小鼠皮下注射生理盐水(0.1mL/10g)和试验组小鼠皮下注射地西泮(1mg/kg)后,分别放入小鼠自主活动箱内,记录小鼠的自主活动次数。然后,两组小鼠均腹腔注射戊巴比妥钠(50mg/kg),记录小鼠翻正反射消失时间和翻正反射恢复时间。结果注射地西泮小鼠自主活动次数显著少于生理盐水组P<0.01)。地西泮和戊巴比妥钠联合麻醉小鼠比戊巴比妥钠单独麻醉小鼠的入睡时间显著缩短P<0.01),睡眠时间显著延长(P<0.01)。结论地西泮和戊巴比妥钠联合麻醉明显提高小鼠的麻醉效果。     

回力胶囊缓解体力疲劳作用的实验研究

目的通过小鼠游泳试验研究回力胶囊缓解疲劳的作用。方法小鼠负重游泳试验,血清尿素氮、肝糖原、血乳酸测定。结果在连续给予小鼠回力胶囊30 d后,与阴性对照组比较,高、中剂量组小鼠的游泳时间显著延长(P<0.01)、(P<0.05);游泳后高、中剂量组的血乳酸增长显著降低(P<0.05);高剂量组小鼠血清尿素氮含量显著降低(P<0.05);高剂量组小鼠肝糖原含量显著增加(P<0.01)。结论回力胶囊具有缓解体力疲劳的作用。     

金线莲甲醇提取物的降血糖作用

研究金线莲甲醇提取物的降血糖作用及其机制.将正常小鼠和链尿佐菌素(STZ)诱导成功的糖尿病小鼠随机分成5组, 14 d后,分别测定小鼠的肝糖原、血糖、血脂及血清抗氧化指标.结果表明,金线莲甲醇提取物能显著降低糖尿病小鼠的血糖,使小鼠血清中超氧化物歧化酶(SOD)活性升高,丙二醛(MDA)浓度显著下降;能显著降低糖尿病小鼠血清中甘油三酯(TG)、总胆固醇(TC)的浓度,并使小鼠的肝糖原质量比显著增加.金线莲甲醇提取物有降血糖作用,其降糖机制可能与其调节血脂水平、增加外周组织对葡萄糖的利用及提高糖尿病小鼠的抗氧化能力有关.     

环磷酰胺对小鼠血清溶血素产生的抑制作用性别差异研究

就环磷酰胺抑制小鼠血清溶血素的生成是否存在性别差异进行了讨论,并就环磷酰胺对小鼠脾/体重的影响进行了探讨.结果表明,虽然环磷酰胺对小鼠血清溶血素的产生具有显著的抑制作用,但这种抑制作用没有性别差异,并且对小鼠脾/体重也没有显著影响.     

环磷酰胺对小鼠血清溶血素产生的抑制作用性别差异研究

就环磷酰胺抑制小鼠血清溶血素的生成是否存在性别差异进行了讨论,并就环磷酰胺对小鼠脾/体重的影响进行了探讨.结果表明,虽然环磷酰胺对小鼠血清溶血素的产生具有显著的抑制作用,但这种抑制作用没有性别差异,并且对小鼠脾/体重也没有显著影响.     

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.