细小病毒H-1NS1基因在荷人肝癌裸小鼠几种组织及移植瘤中的转录和表达

为了解细小病毒H－1 NS1基因在移植瘤与荷瘤裸小鼠部分正常组织中转录和表达的差异性，采用RT－PCR和免疫组织化学的方法，对细小病毒H－1的NS1基因在NB－324K和QGY－7703细胞以及荷人肝癌裸小鼠的移植瘤及部分正常组织中的转录和表达进行了检测，NS1选择性地在人肝癌移植瘤中的高表达结果与细小病毒H－1的复制情况一致，这为细小病毒在活体内抑瘤作用提供了证据。     

人肝癌细胞移植瘤QGY-9204中细胞调亡和坏死并存现象的初步分析

关于细胞调亡和坏死的判别标准及其相互关系已逐渐成为研讨的热点．研究表明,p53基因的表达导致细胞周亡,抑制肿瘤形成．在将Ad／p53导人人肝癌细胞移植瘤QGY－9204的研究中发现,实验组与对照组的移植瘤中均出现凋亡特征指标（DNA梯型条带、凋亡小体等）．而离体培养的肝癌细胞QGY－7703并未检出细胞凋亡现象．那么,实体瘤的DNA梯型条带与调亡和坏死有何关系？研究表明,瘤体内细胞阔亡和坏死并存,与对照组相比,实验组的瘤体积较小,坏死面积小,凋亡比例较高．对移植瘤QGY－9204中细胞调亡和坏死的特征及其并存现象的可能原因进行了初步分析,推断：在该移植瘤内,凋亡和坏死并非是细胞死亡的两种相互排斥的选择,它们可能相继发生和互为影响．     

硒、绞股蓝抗癌作用的实验

采用小鼠皮下移植性肝癌模型观察抑瘤剂量的硒（２ｍｇ／ｋｇ．ｄ）及毒性剂量的硒（４ｍｇ／ｋｇ．ｄ）分别与绞股蓝总皂甙（３ｍｇ／ｋｇ．ｄ）联合应用对小鼠及其肝癌生长的影响，结果表明：绞股蓝总皂甙（３ｍｇ／ｋｇ．ｄ）对小鼠肝癌生长无明显抑制作用，但它能明显增强硒对小鼠肝癌生长的抑制且能拮抗毒性剂量的硒对小鼠的毒性作用，提示硒与绞股蓝具有联合应用价值。     

柘木根黄酮注射液对小鼠S180肿瘤的抑制作用

柘木根水提液全组分F1经聚苯乙烯吸附树脂D3250处理和酒精分步洗脱,得F2,F3和F4几个组分,其中组分F3黄酮含量最高,约占75%。腹腔注射F1和F3,实验结果显示,F1和F3都对S180荷瘤小鼠的肿瘤生长起到抑制作用,其中F3的抑瘤效果比F1有所提高。     

硒,绞股草图抗癌作用的实验

采用小鼠皮下移植性肝癌模型观察抑瘤剂量的硒及毒性剂量的硒分别与绞股草图总皂甙联合应用对小鼠及其肝癌生长的影响，结果表明：绞股蓝总皂甙对小鼠肝癌生长无明显抑制作用，但它能明显增强硒对小鼠肝癌生长的抑制且能拮抗毒剂量的硒对小鼠的毒性作用，提示硒与绞股蓝具有联合应用价值。     

柱层析法纯化重组人肿瘤坏死因子α及其抑癌作用

半合成人肿瘤坏死因子ＴＮＦ－α在大肠杆菌中高表达．发酵后收集菌体经超声破碎，然后在１２０００ｒ／ｍｉｎ４℃离心１０ｍｉｎ，上清经６０℃热处理３０ｍｉｎ，离心上清用６０％饱和度的硫酸铰沉淀，再依次经过ＳｅｐｈａｄｅｘＧ—２５、ＤＥＡＥ—５２纤维素和ＳｅｐｈａｄｅｘＧ—７５柱层析，得到的纯化ｒｈＴＮＦ—α比活性为２×１０７ｕ／ｍｇ，回收率为２４％．经过ＳＤＳ—ＰＡＧＥ电泳和ＨＰＬＣ鉴定，纯度达９５％左右，分子量为１７×１０３．ｒｈＴＮ—α对热稳定性试验表明，—２０℃下贮存一年或者０℃下贮存一个月，ｒｈＴＮＦ—α活性仍保留５０％．人胃癌和肝癌细胞株的体外抑瘤试验和接种小鼠的活体抑瘤试验表明，本实验取得的ｒｈＴＮＦ—α具有明显的抑瘤生长作用．     

IL-2联合银耳多糖激活的同种脾细胞对肝癌实验性治疗的研究

目的研究淋巴因子IL-2联合银耳多糖(Tremella Polysaccharide TP)共同激活的小鼠脾细胞对体外肿瘤细胞的杀伤作用及小鼠移植性肝癌的治疗作用.方法将IL-2激活的小鼠脾细胞(即LAK细胞)和IL-2与银耳多糖协同激活的小鼠脾细胞(即TP-LAK细胞)分别作用于体外培养的3H-TdR标记的肿瘤细胞P815,H22和B16,2h后用γ-闪烁计数仪进行检测,并计算杀伤程度.将上述激活的小鼠脾细胞在小鼠荷肝癌局部皮下注射,隔日1次,共5次.检测肿瘤质量、体积、组织学改变和主要脏器的形态学改变.结果 IL-2与银耳多糖激活的小鼠脾细胞对体外培养的肿瘤细胞有明显的杀伤作用,2种效应细胞对B16杀伤作用最强,H22次之,P815最弱,TP-LAK细胞的作用较之LAK细胞更强,P<0.05.治疗组肝肿瘤质量、体积均低于对照组.组织学上肿瘤坏死程度重且范围广,淋巴细胞、单核细胞浸润明显,纤维组织增生明显.银耳多糖协同IL-2实验组较单纯的IL-2实验组表现得更为明显.除脾脏外,其他主要脏器无明显形态学变化.结论 IL-2激活脾LAK细胞是有效的抗肝癌细胞,IL-2 与银耳多糖在活化脾细胞提高抗肿瘤方面具有协同作用.其对体内主要脏器无明显影响.     

气味沙雷氏菌(Serratia odorifera)核糖体16ku组分的分离和体内抑瘤及免疫增强作用

将气味沙雷氏菌（Ｓｅｒｒａｔｉａ ｏｄｏｒｉｆｅｒａ）核糖体与该核糖体抗血清进行免疫印迹反应（Ｗｅｓｔｅｒｎ ｂｌｏｔ）,发现分子质量为１６ ｋｕ 的蛋白质与抗血清有特异性免疫反应．用制备电泳从核糖体中分离得到１６ ｋｕ 组分,发现其特异性免疫活性依然存在,同时对荷Ｓ１８０ 实体瘤小鼠有明显的保护作用,对荷瘤小鼠的巨噬细胞和Ｔ 淋巴细胞增殖活性有激活作用,并能刺激体内ＮＫ 细胞,使之产生ＮＫ 活性,且作用时间较菌苗更持久．研究结果表明,１６ｋｕ 组分能通过刺激机体的免疫功能抑制肿瘤细胞的生长,是气味沙雷氏菌中抗肿瘤有效成分     

澳洲蟾酥脂溶性提取物对肿瘤细胞的作用

用澳洲蟾酥脂溶性提取物——蟾毒素类（Ｂｕｆｏｔｏｘｉｎｓ）、蟾毒配基类（Ｂｕｆｏｇｅｉｎｉｎｓ）化合物进行的抗肿瘤实验表明，对体外培养的小鼠腹水肝癌（Ｈｃａ）细胞有一定的致损作用，实验药物损伤瘤细胞的机理可能与其破坏瘤细胞的供能系统有关．     

新生牛肝中低分子抑瘤物体内抑瘤作用的研究

采用离子交换柱分离分子量小于1.0 kD的新生牛肝提取液,得到9份样品.在体外抑制肿瘤细胞增殖的基础上,选用体外抑瘤明显的离子交换柱层析获得的〈5〉组分进行体内对荷S-180肉瘤小鼠的肉瘤生长抑制实验.并从白细胞数、胸腺指数和脾指数三个角度分析了低分子抑瘤物对荷瘤小鼠免疫功能的影响;同时用斑点印记法,比较荷瘤前后重要脏器和肉瘤细胞内p27/k ip1细胞周期调控蛋白表达水平的变化.实验结果表明低分子新生牛肝提取液和经离子交换柱层析分离得到的〈5〉组分对荷S-180肉瘤小鼠的肉瘤生长有明显的抑制作用,实验同时发现来源于新生牛肝中的低分子抑瘤物,可通过增强荷瘤小鼠的免疫力,升高肉瘤细胞中的p27/k ip1蛋白表达水平的方式抑制肉瘤细胞的增殖,阻碍瘤细胞向正常组织的浸润和转移.     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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。     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that