检索结果-南通市图书馆

Post-collisional plutonism with adakitic signatures:The Triassic Yangba granodiorite (Bikou terrane,northern Yangtze Block)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal Of Geochemistry 2008年第1期27卷 72-81页

作者： QIN Jiangfeng LAI shaocong li Yongfei State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi＇ an 710069 China

The post-collisional Yangba granodiorite intruded into the Bikou metasedimentary-volcanic group, southern Mianlue Suture, central China. The host granodiorites contain many mafic microgranular enclaves which have acicular apatite, phenocrysts of host granodiorites, implying that the enclaves have been incorporated as magma globules into host granodioritic magma and undergone rapid cooling. The variation trends of major and trace ele- ments between enclaves and host rocks suggest a mixing and mingling process with respect to their petrogenesis. The mafic microgranular enclaves are characterized by shoshonite with SiO2≤63%, σ (4.54–6.18)>3.3, high K2O content (4.22%–6.04%), K2O/Na2O>1; in the K2O-SiO2 diagram, all the samples plot in the shoshonite field, which are enriched in liLE and LREE, with obvious Nb, Ta negative anomalies, indicating a subducting fluid-metasomatised mantle source. Zircon LA-ICP-MS dating of the granodiorites yielded an age of 215.4±8.3 Ma, indicating they were formed during the late-orogenic or post-collisional stage (≤242±21 Ma) of the South Qinling Mountain Belt. The host granodiorites have many close compositional similarities to high-silica adakites from su- pra-subduction zone setting, but tend to have a higher concentration of K2O (3.22%–3.84%) and Mg#. Chon- drite-normalized rare-earth element patterns are characterized by high ratios of (La/Yb)N, the extreme HREE deple- tion and a lack of significant Eu anomalies. In conjunction with the high abundances of Ba and Sr as well as the low abundances of Y and HREE, these patterns suggest a feldspar-poor, garnet ± amphibole-rich fractionation mineral assemblage. High Mg# values demonstrate that the host granodiorites were contaminated by enclave magma. On a whole, integrated geological and geochemical studies suggested the Yangba granodiorites and their mafic micro- granular enclaves resulted from mixing of enriched mantle-derived shoshonitic magma and thickened lower crust-derived felsic ma

关键词：深成现象三叠纪花岗岩岩石

Geochemical characteristics of Bikou volcanic group and Sr-Nd-Pb isotopic composition: Evidence for breakup event in the north margin of Yangtze plate, Jining era

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2007年第z2期50卷 339-350页

作者： li YongFei LAI shaocong QIN JiangFeng liU Xin WANG Juan State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi'an 710069 China State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi'an 710069 China State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi'an 710069 China State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi'an 710069 China State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi'an 710069 China

The geodynamic setting of the Bikou volcanic group is a critical question to trace the Precambrain tectonic framework and evolution for the Yangtze plate. This study has suggested that the Bikou volcanic group is composed of several residual oceanic crust units: MORB (mid-ocean ridge basalt), Alk-OIB (alkaline ocean island basalt) and Th-OIB (tholeiitic ocean island basalt) as well as subduction-related volcanic rocks. According to field observation, those distinct rocks occurred collectively in form of tectonic contact, implying that the Bikou volcanic group was an ophiolitic mélange. Coupled with geochronological data, a perished oceanic basin at the northern margin of the Yangtze block during Neoproterozoic was tested by this ophiolitic mélange. Meanwhile, the isogeochemical data suggest that the ocean occurred in the Southern Hemisphere identical to Indian, South Atlantic and South Pacific oceans in terms of their Dupal anomalies, and the original source of the rocks could be probably mixing by EMⅠand EMⅡ component caused by dehydration melting of subducting oceanic crust during subduction process. On the basis of geochemical characteristics of the studied rocks, the Bikou volcanic group could imply that a partial breakup event occurred in the northern margin of Yangtze plate during the Neoproterozoic era.

关键词： Bikou volcanic group, ophiolitic mélange, geochemistry, Dupal anomaly, Neoproterozoic, Yangtze plate

Loganin inhibits the ROS-NLRP3-IL-1β axis by activating the NRF2/HO-1 pathway against osteoarthritis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Natural Medicines 2024年第11期22卷 977-990页

作者： li Miao XIAO Jiacong CHEN Baihao PAN Zhaofeng WANG Fanchen CHEN Weijian HE Qi li Jianliang li shaocong WANG Ting ZHANG Gangyu WANG Haibin CHEN Jianfa 1^(st)School of Medicine Guangzhou University of Chinese MedicineGuangzhou 510405China The Laboratory of Orthopaedics and Traumatology of lingnan Medical Research Center Guangzhou University of Chinese MedicineGuangzhou 510405China Department of Biomedicine University of BaselBaselSwitzerland Department of Orthopaedics First Affiliated HospitalGuangzhou University of Chinese MedicineGuangzhou 510405China

Loganin(LOG),a bioactive compound derived from Cornus officinalis Siebold & Zucc,has been understudied in the context of osteoarthritis(OA)*** this study,we induced an inflammatory response in chondrocytes using lipopolysaccharide(LPS)and subsequently treated these cells with *** employed fluorescence analysis to quantify reactive oxygen species(ROS)levels and measured the expression of NLRP3 and nuclear factor erythropoietin-2-related factor 2(NRF2)using real-time quantitative polymerase chain reaction(qRT-PCR),Western blotting,and immunofluorescence(IF)***,we developed an OA mouse model by performing medial meniscus destabilization(DMM)surgery and monitored disease progression through micro-com-puted tomography(micro-CT),hematoxylin and eosin(H&E)staining,safranin O and fast green(S&F)staining,and immunohisto-chemical(IHC)*** results indicate that LOG significantly reduced LPS-induced ROS levels in chondrocytes,inhibited the activation of the NLRP3 inflammasome,and enhanced NRF2/heme oxygenase 1(HO-1)*** vivo,LOG treatment mitigated cartilage degradation and osteophyte formation triggered by DMM surgery,decreased NLRP3 expression,and increased NRF2 *** findings suggest that LOG has a protective effect against OA,potentially delaying disease progression by inhibiting the ROS-NLRP3-IL-1β axis and activating the NRF2/HO-1 pathway.

关键词： Loganin NRF2/HO-1 signaling ROS-NLRP3-IL-1βaxis Osteoarthritis

Analysis of the status and countermeasures of the sports and fitness consumption of China＇s urban residents

在线全文

学校读者我要写书评

暂无评论

International English Education Research 2014年第4期 37-41页

作者： Dong Jianming Xin Jiazhong li shaocong Zhangjiakou University Zhangjiakou Hebei 075000

The eighteenth CPC National Congress points out that we should take the urbanization as the driving force of the economic development in China in the new period, vigorously develop the undertakings of the physical culture and sports, enhance the sports con- sciousness of the urban residents in our country, guide our urban residents scientifically and effectively carry out sports and fitness, im- prove their levels of the fitness consumption, enhance the national physique and the comprehensive qualities, construct a beauty China, which are of great significance. Therefore, we must take present situation of the sports and fitness consumption of the urban residents in China as the basis, analyze the reasons, and conduct the targeted guidance and support, to ensure that China＇s urban residents have better working environments, and living conditions, and the better fitness habits, to continue to enhance our people＇s happiness indexes, and real- ize the beautiful Chinese Dream.

关键词： Urban residents sports and fitness consumption current situation countermeasures

Intracontinental Orogenic Igneous Rocks and Orogenic Processes in Qinghai-Xizang-Himalaya

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Earth Science 1995年第2期14卷 5-12页

作者： Deng Jinfu Zhao Hailing Lai shaocong li Yuwen liu Houxiang Mo Xuanxue Di YongjunDepartment of Geology and Mineral Resources , China University of Geosciences , Beijing 100083

Based on the discussion on the intracontinental orogenic igneous rocks formed after India-Asia collision (40 or 45 Ma),the intracontinental orogenic processes of Qinghai-Xizang (Tibet )-Himalaya are traced . Muscovite/two mica granite is considered as a petrological record of intracontinental subduction. Volcanic rocks of shoshonite series are believed to be the products of the orogenic and outside cratonic lithosphere convergence . The intracontinental orogenic igneous rocks are developed only on the margins of the orogenic belt. The pairing phe nomenon of the igneous rock zones is regarded as one of the best signs to recognize the special range of orogenic belt . The stage of magmatic activity is a representation and indicator of orogenic episode . Three pairs of the igneous events in Oligocene , Miocene and Pleistocene and their space distribution indicate three corresponding orogenic episodes and the horizontal expansion across the orogenic belt , respectively . On the northern and southern margins of the orogenic belt are always developed the volcanic eruption of the shoshonite series and the muscovite two mica granite intrusion ,indicating the different nature of the margins .In the former case the colder crust and hotter mantle . as well as the double crust resulted from the horizontal shortening are developed , and in the latter case the hotter crust and colder mantle , the double crust by the overlapping of two crusts are formed . During the Pleistocene orogenic episode the interior of the orogenic belt , i. e. the Gandise - Qiangtang might be going to the stage of the orogenic collapse . and the compressional orogeny might occur only at both the mar gins . The orogenic processes mentioned above show that beneath the Qinghai - Xizang (Tibet ) Himalaya,the deeper mantle has been always undergoing a descending convergence , rather than the simple orogeny resulted from the underthrusting of the India continent only . The dynamic forces that results in rapid up

关键词： intracontinental orogeny . paired igneous rock zone . orogenic process

Inhibitory Effects of Propolis Water Extract on the Proliferation of Cervical Cancer Cells

在线全文

学校读者我要写书评

暂无评论

Medicinal Plant 2023年第2期14卷 57-62页

作者： Wenbin XU Yimeng GAO Nailong liANG ling ZHANG Shuang XING Wensong HAO shaocong li Department of Clinical Laboratory Liaocheng People s HospitalLiaocheng 252000China Department of Gynecology and Obstetrics Liaocheng People s HospitalLiaocheng 252000China Department of Nursing Liaocheng Vocational and Technical CollegeLiaocheng 252000China College of Medicine Liaocheng UniversityLiaocheng 252000China

[Objectives]To investigate the effects of propolis extract on HeLa cells to provide theoretical guidance for facilitating clinical treatment.[Methods]The effects of propolis on inflammation,and proliferation were analyzed based on the levels of DNA transcriptional regulation and mRNA and protein expression levels.[Results]Propolis water extract(PWE)could inhibit the cell proliferation and production of DNA damage in a dosedependent ***,the propolis water extract could significantly downregulate the expression of iNOS-Luc,PTGS-2-Luc,and IL-8-Luc,and that it was related to the expression of the NF-κB family *** the induction of HeLa cells by propolis,the expression of the cell cycle inhibitor gene p21 was increased,while that of the cell proliferation gene Ki67 was decreased.[Conclusions]Propolis water extract could significantly inhibit the cell proliferation and production of DNA damage,suggesting propolis as a potential candidate for the development of adjunctive therapy against cervical cancer.

关键词： Cervical cancer Propolis water extract(PWE) Antineoplastic agents Cell proliferation Inflammation

500kV输电线路继电保护复用光纤通信方式探讨

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

电力系统自动化 2008年第12期32卷 97-99页

作者：利韶聪黄盛广东省电力设计研究院广东省广州市510600

针对目前继电保护复用光纤通信方式所存在的多次光电转换降低系统可靠性的问题,提出在继保小室设置光传输设备的新通信方式构想,并对新通信方式所涉及的光通信设备抗电磁干扰问题进行了讨论和试验。通过数据分析和模拟试验论证了新通信... 详细信息

针对目前继电保护复用光纤通信方式所存在的多次光电转换降低系统可靠性的问题,提出在继保小室设置光传输设备的新通信方式构想,并对新通信方式所涉及的光通信设备抗电磁干扰问题进行了讨论和试验。通过数据分析和模拟试验论证了新通信方式的可行性。

关键词： 500kV输电线路继电保护复用光纤通信电磁兼容性

在线全文

学校读者我要写书评

暂无评论

基于大数据的运动损伤程度评估模型

现代电子技术 2018年第6期41卷 183-186页

作者：李少聪马德李少琼张家口学院河北张家口075000 山西医科大学山西太原030002

对运动损伤程度进行评估,在提高运动质量方面具有重要意义。运动损伤程度评估过程中,传统方法应用经验损伤测评方法进行评估,由于使用经验数据因此存在评估结果误差大,效率低的问题,提出基于大数据的运动损伤程度评估模型。通过大数据... 详细信息

对运动损伤程度进行评估,在提高运动质量方面具有重要意义。运动损伤程度评估过程中,传统方法应用经验损伤测评方法进行评估,由于使用经验数据因此存在评估结果误差大,效率低的问题,提出基于大数据的运动损伤程度评估模型。通过大数据分析对运动损伤程度进行趋势评估,引入模糊集概念考量损伤数据,重新确立模糊关系矩阵指标权重,完成评估模型建立。通过实验表明,采用改进评估模型相比传统评估模型其有效性较高、误差小,具有一定的优势。

关键词：大数据运动质量经验损伤测评指标权重评估模型模糊关系矩阵

在线全文

学校读者我要写书评

暂无评论

运动损伤与运动强度的关系建模仿真分析

现代电子技术 2017年第24期40卷 37-39页

作者：李少聪马德李少琼张家口学院山西医科大学

传统模型不能很好地描述运动强度与运动损伤之间的关系,提出一种运动损伤与运动强度之间的关系模型,确定关节变化参数及约束条件,利用智能SVM原理关系,构建仿真模型。模拟应用环境设计仿真实验,结果表明,上述构建的模型可很好地描述运... 详细信息

传统模型不能很好地描述运动强度与运动损伤之间的关系,提出一种运动损伤与运动强度之间的关系模型,确定关节变化参数及约束条件,利用智能SVM原理关系,构建仿真模型。模拟应用环境设计仿真实验,结果表明,上述构建的模型可很好地描述运动损伤与运动强度间关系,解决运动损伤与运动强度间关联度问题,避免运动强度过大造成运动损伤。

关键词：运动强度运动损伤关系建模仿真分析