49 research outputs found
北朝社会婚姻状况刍议
北朝社会的婚姻状况带有浓厚的母系制的文化习俗。由于少数民族的落后性,其婚俗有门户婚与非门户婚并存,婚姻重财币、流行早婚、再婚及妒嫉成风等特征,并且这种风俗文化具有极为强大的生命
我国优秀青少年蹦床网上运动员皮纹模型与评价标准研究
皮纹选材作为遗传选材的有效方法引起了人们的广泛关注。通过对我国优秀青少年蹦床网上运动员皮纹特征的研究,得出结论:我国优秀青少年蹦床网上运动员在多项皮纹指标上具有明显的特征,利用皮纹特征将一般人群和具有运动潜力的人群区别开来并进行选材是可行的
缺血缺氧环境下葡萄糖转运蛋白1对人脐静脉内皮细胞功能的调控作用
目的本研究旨在探讨葡萄糖转运蛋白1(GLUT1)在缺血缺氧环境下对人类脐静脉内皮细胞(HUVECs)增殖、迁移、粘附和血管形成的影响及其调控作用。方法通过体外实验,将HUVECs置于模拟缺血缺氧的环境中(1%O2,5%CO2,94%N2),对比分析了常氧与缺血缺氧条件下HUVECs的生物学特性,通过检测细胞活性、细胞增殖能力以及利用Western blot技术比较缺血缺氧条件下GLUT1、HIF-1α、VEGFA蛋白的表达变化。进一步采用质粒转染技术过表达GLUT1,并通过划痕实验、细胞粘附实验和管状结构形成实验来评估HUVECs的增殖、迁移、粘附和血管形成能力,透射电镜观察线粒体形态变化,Seahorse代谢分析仪检测氧消耗率(OCR)以评估线粒体功能。结果与常氧条件相比,缺血缺氧环境显著抑制了HUVECs的增殖、细胞活性、迁移和粘附能力,并损害了其血管形成能力。同时,GLUT1,HIF-1α及VEGFA蛋白的表达均显著降低。而在上调GLUT1表达的情况下,HUVECs的迁移、粘附和血管形成能力得到明显改善,同时HIF-1α和VEGFA的蛋白表达量也增加。透射电镜显示,缺血缺氧导致线粒体肿胀和基质损伤,而GLUT1过表达显著缓解线粒体形态异常。OCR结果表明,GLUT1过表达可增强缺血缺氧环境下内皮细胞氧化磷酸化从而改善能量代谢。这些结果提示GLUT1可能通过调节葡萄糖代谢和能量供应,影响HUVECs的功能和血管生成能力。结论本研究揭示了GLUT1在缺血缺氧环境下对HUVECs功能的重要调控作用,这种调控可能通过调节细胞能量代谢和信号传导途径,进而影响细胞增殖、迁移、粘附和血管形成。这些发现为理解GLUT1在心血管疾病中的作用提供了新的视角,并可能为开发新的治疗策略提供潜在的靶点
Raman Spectroscopic Study on Mechanism of Aluminum Triphosphate Pigment
应用拉曼光谱研究了含有防锈颜料涂装特性的钢样 ,在此基础上探讨了三聚磷酸铝防锈颜料对A3钢的保护机理 .三聚磷酸铝溶解后能到达钢样表面 ,其离子可与铁离子化合形成三聚磷酸铁 .三聚磷铁能缓慢地通过化学键牢固地附着在钢样表面 ,最终在钢表面形成一层隔绝腐蚀介质和钢样的紧蜜保护膜阻止了腐蚀的继续发生从而达到保护的目的The painted steel sample whose coating contained anticorrosive pigment has been investigated by Raman spectroscopy.The protective mechanism of aluminum triphosphate pigment for A3 steel is proposed as follows: Aluminum triphosphate can be dissolved and arrive at the surface of the steel.The dissolved triphosphate ions can complex with ferric ions.And the new products,namely ferric triphosphate,can strongly adhere at the surface of the steel by chemical bonds slowly.At last,a compact protective film,which effectively separates the steel substrate from the aggressive media,is formed at the steel surface.作者联系地址:中国科学院福建物质结构研究所,中国科学院福建物质结构研究所,中国科学院福建物质结构研究所,中国科学院福建物质结构研究所,中国科学院福建物质结构研究所 福建厦门361012 ,福建厦门361012 ,福建厦门361012 ,福建厦门361012 ,福建厦门361012Author's Address: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences,Xiamen 361012,Chin
Electrochemical Impedance Spectroscopy Studies on Inhibitive Performance of Aluminum Triphosphate Pigment
利用电化学阻抗谱研究了方解石及三聚磷酸铝环氧涂层的耐蚀性能 ,并提出了它们的作用机理 .结果表明 ,方解石只起体质颜料作用 ,不具备缓蚀性能 ;而三聚磷酸铝因在钢基表面作用形成致密的保护膜则表现出优良的缓蚀性能 .The epoxy coatings on A3 steel sheets containing calcite or aluminum triphosphate (AlTP), were investigated by Electrochemical Impedance Spectroscopy (EIS). The results showed that calcite pigment is not an inhibitor, but an extender pigment, and that AlTP pigment can considerably enhance the protective performance of epoxy coating. The triphosphate ion at the interface between the steel substrate and the coating can complex with the corrosion product, such as ferric and ferrous ions, and form a compact protective film which effectively separates the steel substrate from the aggressive media.作者联系地址:中国科学院福建物质结构研究所!福建厦门361012,中国科学院福建物质结构研究所!福建厦门361012,中国科学院福建物质结构研究所!福建厦门361012,中国科学院福建物质结构研究所!福建厦门361012,中国科学院福建物质结构研究所!福建厦门361012Author's Address: Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Xiamen, 361012,Chin
市域快速轨道交通线路规划的特点和建议
国外大城市快速轨道交通的经验告诉我们,要在城市轨道交通和市域快速轨道交通的基础上构建大城市市域快速轨道交通线网,而且还要给出系统制造模式、设计的速度,运营的相关问题和收费方法等。通过提出市域快速轨道交通“贯穿式”空间网络布局的设想方案,来与地铁线互相接通,实现市区与远郊区快速交通的目标和城市交通轨道收益,给国内大城市的轨道交通发展提供了大量经验。</jats:p
唐代国子监研究
本文以唐代重要职官制度之一的国子监为研究对象,主要研讨了它的学科设置、教育管理,重点讨论了它在唐代近三百年中的发展问题,及其兴衰之由,同时重点研讨了它和科举制度的关系问题,在国家政治生活中的职能与地位问题。 全文共分五个章节。 第一章主要讨论了它的位置与学科设置、经费与教育管理。其中以学科设置与教育管理为讨论的重点。 第二章以安史之乱为分界线,在总体上将国子监的发展分为前后两个时期,其中又以各个皇帝的统治期为分界线,以时间为线索,重点研讨各个皇帝统治期内国子监的发展演变,认为前期以太宗贞观年间、玄宗开元年间为发展的高峰,武则天统治期为低谷;后期发展明显不如前期,但相对而言,代宗永泰、大历初,宪宗元和初为较好时期,余均可视为低谷期。 第三章从七个方面研讨了国子监的兴衰之由。 第四章研讨国子监与当时科举制的关系,重点探讨科举制的发展对国子监发展的影响,认为科举制的发展在当时带来的是更多的负面影响。 第五章重点研讨的是国子监在国家政治生活中的职能与地位问题,认为它在国家的文化礼制建设、外交与选举等方面发生着重要的作用,承担着重要的责任。Taking Imperial College, one of the key official post systems in Tang Dynasty, as its object, this dissertation studies the course of installation and educational management in Imperial College. The discussion focus lies in its development in near 300 years of Tang Dynasty, and the reasons for its rise and decline, while also lies in its relationship with imperial civil service examination system and its function and status in state politics. This dissertation consists of 5 chapters. Chapter 1 mainly explores the position, course of installation, funds and educational management in Imperial College, and takes organization and educational administrative system as discussing focus. Chapter 2 generally divides the development of Imperial College into two stages, with the rebellion of An Lushan and Shi Siming as demarcation. And further dividing the stages according to every emperor’s reign period, and taking time as clue, it mainly discusses the development and evolution of Imperial College during each emperor’s reign period. It regards that the earlier stage reached its summit during Taizong’s Zhenguan and Xuanzong’s Kaiyuan reign period, and came to its valley in Wu Zetian’s reign period, while the development in the later stage is obvious not as good as that in the earlier stage, but ,comparatively speaking, Daizong’s Yongtai、Dali earlier reign period and Xianzong’s Yuanhe earlier reign period can be regarded as better period and the rest are valley period. Chapter 3 discusses the reasons for the rise and decline of Imperial College from 7 aspects. Chapter 4 discusses the relationship between Imperial College and the imperial civil service examination system at that time. It mainly inquires into the influence of the development of imperial civil service examination system on the development of Imperial College, and concludes that imperial civil service system brought negative influence rather than positive one. Chapter 5 mainly discusses the function and status of Imperial College in state politics, and draws the conclusion that it played important role and took important responsibilities in state culture protocol construction, diplomacy and election etc.学位:历史学博士院系专业:人文学院历史学系_专门史学号:que00005
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本文以唐代重要职官制度之一的国子监为研究对象,主要研讨了它的学科设置、教育管理,重点讨论了它在唐代近二百年中的发展问题,及其兴衰之由,同时重点研讨了它和科举制度的关系问题,在国家政治生活中的职能与地位问题。全文共分五个章节。第一章主要讨论了它的位置与学科设置、经费与教育管理。其中以学科设置与教育管理为讨论的重点。第二章以安史之乱为分界线,在总体上将国子监的发展分为前后两个时期,其中又以各个皇帝的统治期为分界线,以时间为线索,重点研讨各个皇帝统治期内国子监的发展演变,认为前期以太宗贞观年间、玄宗开元年间为发展的高峰,武则天统治期为低谷;后期发展明显不如前期,但相对而言,代宗永泰、大历初,宪宗元和...Taking Imperial College, one of the key official post systems in Tang Dynasty,as its object, this dissertation studies the course of installation and educationalmanagement in Imperial College. The discussion focus lies in its development innear 300 years of Tang Dynasty, and the reasons for its rise and decline, whilealso lies in its relationship with imperial civil service examination system andi...学位:历史学博士院系专业:人文学院历史学系_中国古代史学号:B19970200
賽夏族的社
有關我們對原住民社的認識,最多僅停留在不論是清國或日本時代,政府為管理原住民所住居的聚落,因而仿照平地的民庄制度所設置的行政單位。但這些戶數可能不多且又位在蕃界內的最基層單位的社,也可能因治理的需要或發生重大事件的影響,有所增減,甚或編入不同的行政區劃中。本文將試圖從過去的紀錄與調查,瞭解賽夏族各社社勢及對外與官署互動的情形,或使從事的經濟活動更為具體。讓社此一體制,不僅是存留在戶口調查時方便計算人口的單位,同時亦可作為瞭解原住民過去生活的途徑之一
