食管癌病人手术前后血清免疫抑制活性的变化

恶性肿瘤病人免疫功能低下,以及患者血清中存在抑制细胞或体液免疫功能的物质已有报道。多数以迟发性变态反应、淋巴细胞转化试验作为观察指标。本文利用甲基纤维素T细胞集落(CFU-TL)微量培养方法,观察11例食管癌病人手术前后CFU-TL形成能力以及血清抑制作用的变化情况。 1 材料与方法 1.1 病例经组织学确诊食管癌病人11例,男6例、女5例,年龄45～69岁,平均55.5岁。 1.2 血清的制备无菌取病人手术前、手术后(7～10天)外周血2ml,自然凝固后,离心取血清。经56℃     

流式细胞术微球阵列法检测急性白血病血清IL-6、IL-10和TNF水平

目的:探讨流式细胞术微球阵列法(CBA)在细胞因子检测中的应用及血清肿瘤坏死因子(TNF)、白细胞介素6(IL-6)和白细胞介素10(IL-10)在不同亚型急性白血病(AL)中的表达水平.方法:采用BD CBA Flex Set IL-6、IL-10、TNF试剂盒和流式细胞术检测29例急性白血病患者和20例正常人血清样本中3种细胞因子水平.结果:AL患者IL-6、IL-10和TNF水平显著高于正常对照组,急性淋巴细胞白血病(ALL)的IL-10和TNF水平较急性非淋巴细胞白血病(ANLL)有显著性提高(P<0.05).在ANLL亚型中,Ml型IL-6水平最高.结论:CBA法能快速、准确地定量检测细胞因子;AL血清中IL-6、IL-10和TNF水平升高,可能与疾病的发生发展存在相关性.     

MTT法测定3种仙人掌多糖对人癌细胞的作用

观察仙人掌属3种植物多糖对人肺腺癌(Anip)细胞、宫颈癌(Hela)细胞、白血病(K562)细胞生长的抑制作用,并进行比较分析.采用MTT法,对细胞生长抑制率、存活率、半数抑制浓度进行测定.结果3种仙人掌多糖对人癌细胞的增殖具有明显的抑制作用,且随药物浓度增加,抑制率逐渐增大,与正常组比较作用极其显著(P<0 01).其中药用仙人掌多糖对人肺腺癌(Anip)细胞生长的抑制作用最强,食用仙人掌多糖对人白血病(K562)细胞生长的抑制作用最强,仙人球多糖对人宫颈癌(Hela)细胞生长的抑制作用最强.仙人掌属3种植物多糖对人肺腺癌细胞、宫颈癌细胞、白血病细胞生长有很好的抑制作用.     

天蓝苜蓿含药血清抗白血病K562细胞的体外实验研究

探讨天蓝苜蓿含药血清对白血病细胞株K562细胞增殖抑制的影响,为探索中药治疗白血病提供一定理论依据。方法用不同浓度天蓝苜蓿含药血清处理白血病细胞株K562,24、48、72h后,采用MTT法检测细胞抑制率。结果天蓝苜蓿含药血清能有效的抑制K562细胞增殖,呈时间和剂量依赖关系。细胞发生一系列形态学改变。结论天蓝苜蓿含药血清对K562细胞增殖有一定的抑制作用。     

白介素24对单个核细胞bcl-2表达的影响

为探讨白细胞介素24(IL-24)对成人急性白血病骨髓单个核细胞(BMMNC)体外生长的影响,并初步研究其作用机制。随机选取急性白血病住院患者15例,均经FAB分型或免疫学分型确诊,其中确诊未治的成人急性淋巴细胞白血病(ALL)患者5例,成人急性非淋巴细胞白血病(ANLL)患者10例。取患者骨髓,分离单个核细胞并培养,将不同浓度IL-24作用于BMMNC。应用四氮唑蓝(MTT)比色还原法、AnnexinV-FITC染色流式细胞术及逆转录-聚合酶联反应(RTPCR),分别检测IL-24对急性白血病BMMNC体外细胞增殖与凋亡及bcl-2表达的影响。结果显示,IL-24对体外培养的白血病BMMNC有明显的生长抑制作用,且呈时间、剂量依赖性,与阴性对照组相比差异有统计学意义(P0.05)。IL-24浓度50 ng/mL作用急性白血病BMMNC,48 h后凋亡率为39.21%±5.79%,高于对照组(P0.01)。不同浓度IL-24处理白血病BMMNC,能够降低bcl-2 mRNA的表达。IL-24体外培养的成人急性白血病BMMNC,有明显的生长抑制、诱导凋亡作用。由此可知,IL-24可以下调bcl-2 mRNA表达,可能是IL-24抑制急性白血病BMMNC生长作用的重要机制。     

小剂量阿糖胞苷、高三尖杉酯碱与G-CSF治疗急性非淋巴细胞白血病(附16例疗效观察)

目的探讨治疗急性非淋巴细胞白血病的方法.方法对我科收治的16例急性非淋巴细胞白血病,应用小剂量阿糖胞苷和高三尖杉碱(HA方案)与G-CSF联合方案治疗.结果完全缓解率31.25%(5/16),占总数(CR+PR)68.75%(11/16).结论本方案可明提高急性非淋巴细胞白血病的缓解率,对过渡到标准剂量强化治疗创造机会具有积极的意义,可作为治疗急性非淋巴细胞白血病较好的方案.     

小剂量阿糖胞苷、高三尖杉酯碱与G-CSF治疗急性非淋巴细胞白血病(附16例疗效观察)

目的探讨治疗急性非淋巴细胞白血病的方法.方法对我科收治的16例急性非淋巴细胞白血病,应用小剂量阿糖胞苷和高三尖杉碱(HA方案)与G-CSF联合方案治疗.结果完全缓解率31.25%(5/16),占总数(CR+PR)68.75%(11/16).结论本方案可明提高急性非淋巴细胞白血病的缓解率,对过渡到标准剂量强化治疗创造机会具有积极的意义,可作为治疗急性非淋巴细胞白血病较好的方案.     

人血清核磁共振谱在白血病临床研究上的应用

运用核磁共振波谱（NMRS）研究血清中磷脂、脂蛋白及乳酸的代谢变化，并探讨该法在白血病临床研究上的应用和可行性。实验采用MSL-300MHz型超导核磁共振谱仪测量白血病人及健康人血清标本，通过^31P-NMRS分析比较血清中磷脂酰胆碱（PC）信号及磷脂酰乙醇胺和（神经）鞘磷脂（PE SM）信号相对积分面积，了解各自血清中的磷脂含量水平。并对血清^1H-NMRS中甲基和亚甲基峰进行线性拟合，从而分析血清中各种脂蛋白及乳酸含量的变化。白血病人血清中的磷脂信号强度相对正常人明显更低，反映了对应的PC及（PE SM）含量相对正常人更低，尤其对初发未治疗的病人，差别更加明显。病人血清中各种脂蛋白含量也与正常人存在差异，且乳酸水平明显高于正常人。该方法较好地从分子水平反映了白血病人与正常人血清中磷脂、脂蛋白及乳酸水平的差异，为白血病临床研究提供了一个简便、直观的新方法，值得进一步研究。     

Auto-HSCT联合大剂量化疗及IL-2治疗急性白血病的临床研究

对急性白血病(AL)患者自体造血干细胞移植(Auto＿HSCT)前进行大剂量化疗,移植后给白细胞介素 2(IL 2)免疫治疗以降低AL患者Auto＿HSCT后的复发率,延长患者的生存期.10例AL第一次缓解期(CR 1)的患者进入研究.移植前急性淋巴细胞白血病(ALL)患者3例均接受大剂量甲氨碟呤1疗程及大剂量阿糖胞苷(HD Ara C)加蒽环类抗肿瘤药1疗程.急性非淋巴细胞白血病(ANLL)患者7例接受HD Ara C加蒽环类抗肿瘤药2疗程.化疗结束后给患者行Auto＿HSCT治疗.预处理方案为:CY/TBI;MAC或EAC方案.移植的CD34+细胞5.5×106～12.2×106/kg.患者造血重建后给IL 21×106～2×106μ治疗每天1次,5d为1疗程.患者均接受3～5疗程的治疗.经以上序惯治疗后,1例ALL患者14月后复发,经化疗无效死亡.9/10(90.00%)例无病生存至今,平均生存期37.10月(37.1±24.98),明显延长.可见对AL患者Auto＿HSCT前大剂量化疗,最大限度降低患者体内白血病负荷;移植后免疫治疗清除微小残留病,可能是降低AL患者Auto＿HSCT后复发,延长患者生存期的有效途径.     

~(211)At标记单克隆抗体对移植于裸小鼠体内人胃癌实体瘤导向治疗的初步研究

~(211)At标记的抗人胃癌单克隆抗体3H_(11)对裸小鼠人胃癌移植瘤的生长在短期内有明显抑制作用。治疗后第9天药物对人胃癌生长的抑制作用最为明显~(211)At—3H_(11)(5μCi/只)对人胃癌的抑制率:尾静脉给药为80％,胃癌移植瘤内给药为93％,相同剂量的离子型~(211)At尾静脉给药对胃癌的抑制率为48％.第20天处死动物时~(211)At—3H_(11)尾静脉和肿瘤内给药的抑制率分别是66％和81％,离子型~(211)At尾静脉给药的抑制率为6％,抑制作用明显下降。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

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.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

A computer generator for randomly layered structures

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

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

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.     

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。     

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

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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     

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