1,280 research outputs found

    Mindin is up-regulated during colitis and enhances inflammation by activating the transcription activity of NF-κB protein family

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    炎症性肠病(IBD)的发生,被认为是遗传、环境和黏膜免疫三方面因素共同作用的结果,而肠黏膜异常的免疫应答又是发病的关键因素之一。在炎症局部,炎性细胞的招募和激活依赖各种细胞膜受体及整合素与细胞基质(ECM)间的相互作用。细胞外基质蛋白Mindin是Mindin/F-spondin家族成员,在小鼠炎症模型中,有多项研究表明Mindin在免疫应答过程中扮演重要角色,但对于其在炎症中的功能和调控机制研究较少。故本课题拟探索肠炎中Mindin的表达水平及其在炎症中的信号调控机制。 本课题研究中,我们给予C57BL/6小鼠3%的DSS溶液构建急性肠炎模型,提取模型小鼠肠道组织mRNA,通过实时定量PC...Inflammatory bowel disease (IBD) is a group of chronic inflammatory gastrointestinal diseases with complicated etiology and pathogenesis, which is believed to be related to many factors such as intestinal environment , heredity and immunity. Dysfunctions of the immune system has been seen as an important one among the factors. The leukocyte recruitment to inflammatory area and its activation dep...学位:医学硕士院系专业:医学院_内科学学号:2452012115313

    The neuronal cell cycle regulation mechanism and related animal model in Alzheimer’s disease

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    阿尔茨海默病(Alzheimer’sDisease,AD)是一种与年龄相关的神经退行性疾病,它的主要临床表现是记忆和认知功能的逐渐衰退。AD是一种严重影响人类健康的神经退行性疾病,至今仍未找到有效的治疗方法。因此从预防和早期治疗角度考虑,对于AD早期病理变化的研究就十分重要。成熟神经元处于细胞周期静止期,而在AD中,大量神经元的细胞周期被重新激活,但这些神经元不会再分裂而是最终走向了凋亡,这是目前在AD小鼠模型中已知最早的细胞功能紊乱。但对细胞周期重新激活导致神经元凋亡的机制目前还不清楚。AD中神经元细胞周期的重新激活所导致的神经元凋亡是神经退行性疾病的发生的重要原因,但目前对于这一机制的研究...As one major neurodegenerative disease, Alzheimer’s Disease (AD) is characterized by the loss of memory and cognition function. AD has become one of the common diseases which affect human health seriously, but has not yet found effective clinical treatments. So in consideration of prevention and early treatment, it is important to identify the early pathological changes of AD. The mature neurons r...学位:理学硕士院系专业:医学院_微生物学学号:2452012115320

    Research on the structure and properties of SiC ceramic containing titanium and boron

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    碳化硅(SiC)陶瓷具有高强度、高硬度、耐高温、抗氧化、抗化学腐蚀、低热膨胀系数、高热传导率等众多特点,不仅被广泛应用在功能陶瓷、高级耐火材料、磨料及冶金原料等民用领域,还应用于航空航天领域,用作发动机的热端部件。为了提高先驱体转化法制备碳化硅陶瓷的耐高温性和吸波性能,本文将钛、硼元素引入陶瓷先驱体中,利用二者高温下生成的二硼化钛作为SiC陶瓷的烧结助剂,提高SiC陶瓷的耐高温性能,并利用钛元素提高陶瓷的吸波性能,系统研究了钛硼的引入,陶瓷结构与性能的演变规律。 首先,固定先驱体中硼元素的含量,研究钛元素含量(0、2.87、5.05和7.98%)和烧成方法对SiC陶瓷结构与性能的影响规律。研...Silicon carbide (SiC) ceramics have high strength, high hardness, high temperature resistance, oxidation resistance, chemical resistance, low thermal expansion coefficient, high thermal conductivity, and other characteristics. It is not only widely used in ceramics, advanced refractories, abrasives and metallurgical raw materials and other civilian areas, but also applied in the aerospace field an...学位:工学硕士院系专业:材料学院_工程硕士(材料工程)学号:2072013115009

    Design and Implementation of Internal Communication Platform for A Company

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    经济快速发展的今天,企业规模随着企业的发展越来越大,伴随着企业规模的扩大,企业内部信息的传递和流通变得缓慢和低效。传统的企业信息传递通过将信息记录在纸张这个载体上进行传递,如通过张贴告示、公告,或者通过分发文件等,这些传递方式受到时间和空间的限制,容易导致企业内部出现信息不对称的情况,严重影响企业信息传达的效率,不利于企业的工作,而且无法实现企业信息的双向互动。当今,信息技术飞速发展,利用信息技术来提高企业信息传递的效率,实现企业互动交流已变的可行。本文旨在通过对企业信息传递的特点进行分析,进而开发出对企业信息交流进行统一管理的信息交流平台。 根据某公司的实际情况,开发满足企业内部通信系统的...Rapid economic development today, with the development of enterprise-scale enterprises is growing, along with the expansion of business scale, transfer and circulation of information within the enterprise becomes slow and inefficient. Traditional enterprise information delivery by the information recorded on paper as a carrier for delivery, such as by posting notices, announcements, or through the...学位:工程硕士院系专业:软件学院_工程硕士(软件工程)学号:X201323221

    Research on the Construction of Risk Management System in PE —— Based on the Case Study of A Company

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    私募股权投资在我国经历了引入、扩张和萧条后,正逐渐走向成熟化。作为推动中国经济发展的新动力之一,私募股权投资已成为联通资本市场和企业的重要一环。本文基于私募股权投资以及风险管理相关理论,应用案例分析法,综合分析某PE机构在对A公司的股权投资案例中各投资阶段所面临的风险以及该PE机构的应对措施,发现PE机构的风险管理还存在以下不足:第一,缺乏一个动态的整体风险管理系统;第二,尽职调查不充分;第三,风险监控不足,沟通不畅;第四,风险应对效率低下。 针对案例中发现的问题,本文提出了解决方案:首先,应建立完善的风险管理系统,将风险管理贯穿各个投资阶段,将定性和量化的方法相结合,做到监管及时、沟通顺畅...After the introduction, expansion and depression, private equity investmentin China gradually become mature. As one of the new power of China's economy development, PE have become an important link between capital market and enterprises. Based on theories of venture capital and risk management, this paper makescomprehensive analyses of the risk PE institutions face and how they deal with them. It ...学位:工商管理硕士院系专业:管理学院_工商管理硕士(高级管理人员工商管理硕士)学号:X201115631

    Snail regulates hepatocellular carcinoma orphan nuclear receptor Nur77 promoter methylation

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    Nur77隶属于类固醇/甲状腺/视黄酸核受体超家族,在细胞增殖、凋亡过程以及肠癌、黑色素瘤的发生发展中发挥着重要的作用。但是,有关Nur77与肝癌的研究却比较少。基于Oncomine数据库信息,本文研究发现,在临床组织样品中,癌旁组织中Nur77的表达远远高于对应肝癌组织中的表达。我们从基因修饰入手,通过甲基化抑制剂ADC梯度给药实验最终将目标指向DNA甲基化。通过序列比对我们发现,Nur77启动子上含有转录抑制因子Snail特异性结合的E-box结构(CAGGTG)。通过构建稳转过表达或者敲低Snail的肝癌细胞,Nur77在mRNA水平、蛋白水平及其启动子活性都与Snail呈现一种负相关变...Nur77 is a member of the steroid/thyoid/retinoid nuclear receptor superfamily. Although it plays an important role in cell proliferation, apoptosis, development of colon cancer and melanoma, there is less study focused on Nur77 and hepatocarcinoma. Based on the Oncomine Database information, we found that the expression of Nur77 in para-carcinoma is higher than that in paired carcinoma in clinical...学位:理学硕士院系专业:生命科学学院_细胞生物学学号:2162014115248

    The Constitutional Debate on Legalized Homosexual Marriage in the United States ——Based on Obergefell v. Hodges

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    美国社会逐渐容忍和保护同性婚姻。美国联邦最高法院就同性婚姻问题作出的判决亦倾向于使同性婚姻合法化,同时,判决中存在着大量的关于同性婚姻合法化的宪法争论。本文试图以Obergefellv.Hodges案为中心,从三个方面分析美国同性婚姻合法化的宪法争论。这三个方面分别是美国联邦最高法院在公共政策中的角色立场问题、遵循前例或推翻前例的司法抉择问题和宪法条款对司法裁判的拘束力问题。本文分为五个部分。第一章对美国同性婚姻问题的基本背景作简单介绍。第二章阐述美国联邦最高法院裁判的几个重要的同性婚姻案例的案情和判决理由。第三章介绍美国联邦最高法院在公共政策中的角色立场问题,首先介绍Obergefellv....Recently, the American society tends to tolerate and protect homosexual marriage. Cases related to homosexual marriage and played out by the Supreme Court of the United States tend to make the homosexual marriage legal. And at the same time, there are many constitutional controversies in those cases. This thesis tries to analyze the constitutional controversy of homosexual marriage cases played ou...学位:法学硕士院系专业:法学院_宪法学与行政法学学号:1362015115096

    Survive, Strive, and Thrive: An Ecofeminist Interpretation of The Color Purple

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    摘要 本文旨在从生态女性主义的视角解读《紫色》。生态女性主义是女性主义思潮和各种理论发展的重要阶段,它把对女性的压迫和对自然的破坏置于整个压迫体系中进行研究,为认识女性困境和更真切地理解人类和自然提供了一个崭新的、广阔的视角。艾丽丝•沃克对黑人苦难的关注、对父权制和二元社会中黑人与白人、人与自然互惠共存的关系的思考体现了她深刻的生态女性主义意识。她所提倡的“妇女主义”表现出对黑人女性生活和权益的关心,而对黑人遭遇的同情和对自然的热爱使她意识到以黑人女性为代表的弱势群体和被工具化了的自然之间的关系。《紫色》之所以广受好评,很大程度上得益于沃克的生态女性主义思想。因此,对该小说进行生...Abstract This M. A. thesis aims to explore The Color Purple from an ecofeminist perspective. Based on other feminist thoughts and theories, and with a unique perspective, ecofeminism is one important stage in the feminist evolution. By placing women's sufferings and environmental deterioration in systems of oppression, ecofeminism provides a new and broader vision for understanding the human situ...学位:文学硕士院系专业:外文学院英语语言文学系_英语语言文学学号:1202007115263

    CEO Political Connections and CEO Turnovers ——Based on the Data of Chinese Private Listed Companies

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    民营企业存在“政治关联”是一个全球普遍现象。处于转轨经济时期的我国,这种现象更加的普遍。因此,吸引了大量学者的关注。但已有的研究大多集中在政治关联对公司业绩、融资、政府补贴、行业准入等方面的影响上,较少关注政治关联对公司内部控制机制的影响。CEO变更是公司内部控制机制的衡量指标之一,因此本文选择研究CEO政治关联对CEO变更的影响,一定程度上考察政治关联对公司内部控制机制的的影响。在高管个人特征因素对高管变更影响研究方面,大多数学者主要关注高管年龄、持股、任期等,而未将高管政治关联背景纳入其中。因此,本文的研究拓展和丰富了政治关联研究和CEO变更影响因素研究,具有一定的意义。 本文以2008...In the world, it is a common phenomenon that private enterprises builded political connections. This phenomenon is more common in china which is a transitional economy. Thus, a large number of scholars have been attracted to reserch in this area. Their studies focus primarily on the impact of political connections on firm perfomance, firm financing, government subsidy, access to regulated industri...学位:管理学硕士院系专业:管理学院企业管理系_企业管理(含财务管理、市场营销、人力资源管理)学号:1762009115105
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