检索结果-南通市图书馆

Origin of the Yueguang gold deposit in Xinhua, Hunan Province, South China: insights from fl uid inclusion and hydrogen–oxygen stable isotope analysis

在线全文

学校读者我要写书评

暂无评论

Acta Geochimica 2024年第2期43卷 235-254页

作者： Hongxin Fan Qiang wang Yulong Yang Yao Tang Hao Zou College of Earth Sciences Chengdu University of TechnologyChengdu 610059China College of Earth Sciences Jilin UniversityJilin 130061China

The Yueguang gold deposit is located in Fengjia,Xinhua County,Hunan Province,South *** represents a recently discovered small-scale gold deposit situated in the southwestern region of the Jiangnan Orogenic Belt,west of the Baimashan granitic *** order to discern the characteristics of the ore-formingﬂuids,the underlying mineralization processes,and establish a foundation for the origin of the Yueguang gold depositﬂuid inclusion micro-thermometry,as well as quartz hydrogen and oxygen isotope analysis,have been carried out on samples obtained from various stages of *** hydrothermal miner-alization stages within the Yueguang gold deposit can be categorized into three stages:(i)the barren,pre-ore quartz-pyrite stage(Stage Ⅰ),the quartz-pyrite-gold stage(Stage Ⅱ),and the post-ore quartz-carbonate stage(Stage Ⅲ),with the second stage being the main mineralization ***ﬂuid inclusions identiﬁed in samples from the main min-eralization stage can predominantly be described with the NaCl–H_(2)O and CO_(2)–NaCl–H_(2)O *** inclusions display homogenization temperatures ranging from 158.8 to 334.9℃,and theﬂuid salinity ranges from 0.3%to 4.0%(wt.%NaCl equiv.).Laser Raman spectroscopy analysis of individual inclusions further reveals the presence of gas-phases such as CO_(2),CH_(4),and N_(2).Isotopic analysis indicatesδ^(18)Oﬂuid values ranging from 3.95 to 6.7‰ and δDH_(2)O values ranging from-71.9 to-55.7‰.These results indi-cate that the ore-formingﬂuid of the Yueguang gold deposit belongs to metamorphic hydrothermalﬂuids of middle-low temperature and low *** the process of ore formation,gold is transported in the form of Au(HS)2-complexes,with gold deposition being driven byﬂuid ***,the Yueguang gold deposit is categorized as an orogenic gold deposit dominated by metamorphic hydrother-malﬂ*** may become a new target for gold exploration in the Baimashan region,central Hunan Province.

关键词： Hunan province Yueguang gold deposit Fluid inclusions Hydrogen–oxygen isotopes Laser Raman Fluid immiscibility Orogenic gold deposit

合并不同程度阻塞性睡眠呼吸暂停的高血压患者的主动脉根部直径

在线全文

学校读者我要写书评

暂无评论

中华高血压杂志 2023年第1期 100-100页

作者： wang D Xu JZ Kang YY Zhang W Hu LX wang jg 林沁郑武洪

阻塞性睡眠呼吸暂停(obstructive sleep apnea, OSA)是多种心血管病的危险因素。本研究调查了合并OSA的高血压患者主动脉根部直径与缺氧相关参数之间的关系。研究纳入合并OSA的高血压患者242例，其中轻度OSA 52例，中度71例，重度119例...

阻塞性睡眠呼吸暂停(obstructive sleep apnea, OSA)是多种心血管病的危险因素。本研究调查了合并OSA的高血压患者主动脉根部直径与缺氧相关参数之间的关系。研究纳入合并OSA的高血压患者242例，其中轻度OSA 52例，中度71例，重度119例。所有患者都接受了超声心动图检查(测量了主动脉根部直径)和多导睡眠图监测[测量了呼吸暂停低通气指数(apnea-hypopnea index, AHI)、氧饱和度指数和氧饱和

关键词：

未治疗的中国高血压患者血清半乳糖凝集素3和黏蛋白1与肾功能的关系

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

中华高血压杂志 2023年第11期31卷 1132-1132页

作者： Huang QF Cheng YB Guo QH wang Y Chen YL Zhang DY An DW Li Y wang jg 刘青练桂丽

半乳糖凝集素3(galectin-3)是一种多功能的凝集素蛋白和黏蛋白-1(mucin-1,CA15-3)的配体，在动物模型中与肾纤维化有关，在人类中与肾功能有关。然而，尚无相关的人群研究探索肾功能与该配体和受体的关系。因此，研究者探讨未经治疗的...

半乳糖凝集素3(galectin-3)是一种多功能的凝集素蛋白和黏蛋白-1(mucin-1,CA15-3)的配体，在动物模型中与肾纤维化有关，在人类中与肾功能有关。然而，尚无相关的人群研究探索肾功能与该配体和受体的关系。因此，研究者探讨未经治疗的中国高血压患者肾功能与血清galectin-3和CA15-3的独立相关性。方法：研究对象为门诊疑似高血压患者，但未接受过降压药治疗。

关键词：

Heterostructured Co_(3)Se_(4)/CoSe_(2)@C nanoparticles attached on three-dimensional reduced graphene oxide as a promising anode towards Li-ion batteries

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Materials Science 2024年第2期18卷 101-115页

作者： Mingjun Pang Zhaoyang Song Miaomiao Mao Shang Jiang Ruxia Zhang Runwei wang Jianguo Zhao Engineering Research Center of Coal-based Ecological Carbon Sequestration Technology of the Ministry of Education Shanxi Datong UniversityDatong 037009China State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of ChemistryJilin UniversityChangchun 130012China

In situ carbon-coated Co_(3)Se_(4)/CoSe_(2)(Co_(x)Se_(y))nanoparticles(NPs)attached on three-dimensional(3D)reduced graphene oxide(rGO)sheets were skillfully developed in this work,which involved the environment-friendly hydrothermal method,freeze drying,and selenide *** the structure,the glucose-derived carbon layer exhibited significantly homogeneous dispersion under an argon *** structure not only has enhanced stability,but also can effectively mitigate the volume swell of Co_(x)Se_(y) *** resulted Co_(3)Sea/CoSe_(2)@C/rGO(CSe@C/rGO)exhibited a specific surface area(SSA)of 240.9 m^(2)·g^(-1),offering more electrochemically active sites for the storage of energy related to lithium *** rGO matrix held exceptional flexibility and functional structural rigidity,facilitating the swift ion intercalation and ensuring the high conductivity and recyclability of the *** applied to anodes designed for lithium-ion batteries(LiBs),this material demonstrated distinguished rate and ultra-high reversible capacity(872.98 mA·h·g^(-1) at 0.5 A·g^(-1)).Meanwhile,its capacity retention reached 119.5%after 500 cycles at 2 A·g^(-1),with a coulombic efficiency of 100%.This work potentially paves the way for generating fast and powerful metal selenide anodes and initiating LiBs with good performance.

关键词： CSe@C/rGO lithium-ion battery reduced graphene oxide electrochemicalperformance heterostructure

Study on sex differences and potential clinical value of threedimensional computerized tomography pelvimetry in rectal cancer patients

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2024年第3期16卷 773-786页

作者： Xiao-Cong Zhou Fei-Yue Ke Gaurav Dhamija Hao Chen Qiang wang Department of Colorectal Surgery The Dingli Clinical Institute of Wenzhou Medical University(Wenzhou Central Hospital)Wenzhou 325000Zhejiang ProvinceChina Postgraduate Training Base Alliance of Wenzhou Medical University Wenzhou Central HospitalWenzhou 325000Zhejiang ProvinceChina School of International Studies Wenzhou Medical UniversityWenzhou 325000Zhejiang ProvinceChina Department of Radiology The Dingli Clinical Institute of Wenzhou Medical University(Wenzhou Central Hospital)Wenzhou 325000Zhejiang ProvinceChina

BACKGROUND Laparoscopic rectal cancer radical surgery is a complex procedure affected by various ***,the existing literature lacks standardized parameters for the pelvic region and soft tissues,which hampers the establishment of consistent *** To comprehensively assess 16 pelvic and 7 soft tissue parameters through computerized tomography(CT)-based three-dimensional(3D)reconstruction,providing a strong theoretical basis to address challenges in laparoscopic rectal cancer radical *** We analyzed data from 218 patients who underwent radical laparoscopic surgery for rectal cancer,and utilized CT data for 3D pelvic *** anatomical points were carefully marked and measured using advanced 3D modeling *** analyze the pelvic and soft tissue parameters,we emp-loyed statistical methods including paired sample t-tests,Wilcoxon rank-sum tests,and correlation *** The investigation highlighted significant sex disparities in 14 pelvic bone parameters and 3 soft tissue *** demonstrated larger measurements in pelvic depth and overall curvature,smaller measurements in pelvic width,a larger mesorectal fat area,and a larger anterior-posterior abdominal *** contrast,females exhibited wider pelvises,shallower depth,smaller overall curvature,and an increased amount of subcutaneous fat ***,there were no significant sex differences observed in certain parameters such as sacral curvature height,superior pubococcygeal diameter,rectal area,visceral fat area,waist circumference,and transverse abdominal *** The reconstruction of 3D CT data enabled accurate pelvic measurements,revealing significant sex differences in both pelvic and soft tissue *** study design offer potential in predicting surgical difficulties and creating personalized surgical plans for male rectal cancer patients with a potentially“difficult pelvis”,ultimately improving surgical ***

关键词： Computerized tomography Rectal cancer Three-dimensional reconstruction Pelvimetry Sex differences

Microstructure Recrystallization and Mechanical Properties of a Cold-Rolled TiNbZrTaHf Refractory High-Entropy Alloy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2024年第4期37卷 633-647页

作者： Chuan Rong Jieren Yang Xiaoliang Zhao Ke Huang Ying Liu Xiaohong wang Dongdong Zhu Ruirun Chen College of Materials Science and Engineering Sichuan UniversityChengdu610065China Key Laboratory of Air-Driven Equipment Technology of Zhejiang Province Quzhou UniversityQuzhou324000China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin150001China

The equiatomic TiNbZrTaHf alloy was successfully rolled at room temperature with the reduction of ~ 85%. The microstructure and tensile properties were investigated after cold working and annealing. It was determined that the recrystallization temperature of the TiNbZrTaHf alloy between 850 and 900 ℃. Complete recrystallization and normal grain growth occurred, the high stability of single phase was maintained after annealing at 1000, 1200, and 1400 ℃. But the precipitated phase appeared after long term annealing, as seen after 500 h at 1000 ℃. After cold working, the tensile strength and the elongation of TiNbZrTaHf were 1137 MPa and 25.1%, respectively. The annealed alloy has a high tensile strength (σ_(b )= 863 MPa) and ductility (ε_(e )= 28.5%). Moreover, the oxidation of TiNbZrTaHf alloy at elevated temperatures has a significant impact on its mechanical properties. The poor oxidation resistance of TiNbZrTaHf can accelerate tensile failure by inducing fractures at grain boundaries.

关键词： Refractory high entropy alloy Cold rolling Recrystallization Oxidation resistance Mechanical properties

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

试论影响基因芯片实验设计的因素

世界华人消化杂志 2005年第10期13卷 1206-1209页

作者：吴斌林乔王米渠王建国成都中医药大学中医遗传学研究室四川省成都市610072 新加坡国立大学热带海洋科学研究所新加坡119260

良好的基因芯片实验设计是充分发挥基因芯片技术优势的前提,而研究目的是实验设计的基础.本文介绍了参照、平衡和环形三种常用的单因子、时间序贯和复因子等基本的基因芯片实验设计方案:探讨了重复实验、混合样本和样本规模等影响基因... 详细信息

良好的基因芯片实验设计是充分发挥基因芯片技术优势的前提,而研究目的是实验设计的基础.本文介绍了参照、平衡和环形三种常用的单因子、时间序贯和复因子等基本的基因芯片实验设计方案:探讨了重复实验、混合样本和样本规模等影响基因芯片实验设计的因素,为基因芯片实验设计提供参考.

关键词：实验设计基因芯片技术研究目的重复实验设计方案混合样本因子

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

小肠黏膜下层粘接交联制作小口径血管支架

中国组织工程研究与临床康复 2007年第32期11卷 6374-6378页

作者：刘生和王建广范存义莫秀梅上海交通大学附属第六人民医院骨科上海市200233 东华大学生物科学与技术研究所上海市201620

目的:探讨将小肠黏膜下层粘接交联制作小口径血管支架的可行性。方法:实验于2006-04/12在上海交通大学附属第六人民医院中心实验室和四肢显微外科研究所完成。①实验材料:小肠黏膜下层膜按Abraham法制备;清洁级雄性新西兰大白兔24只,2.8... 详细信息

目的:探讨将小肠黏膜下层粘接交联制作小口径血管支架的可行性。方法:实验于2006-04/12在上海交通大学附属第六人民医院中心实验室和四肢显微外科研究所完成。①实验材料:小肠黏膜下层膜按Abraham法制备;清洁级雄性新西兰大白兔24只,2.8～3.2kg。②实验过程:以胶原蛋白-硫酸软骨素共混溶液将猪小肠黏膜下层膜粘接成小口径(内径3.0mm)管型支架,并用碳化二亚胺交联,得到粘接交联小肠黏膜下层管。取24只兔,手术造成颈总动脉缺损,随机平分为2组,对照组采用缝制小肠黏膜下层管桥接修复缺损;实验组采用粘接交联小肠黏膜下层管桥接修复缺损。③实验评估:通过爆破压测定检测支架的粘接强度、通过体外溶血试验和细胞毒性试验检测支架的生物相容性;于术后1,2周和1,2个月做血管彩色多普勒超声检测其通畅性;以组织学苏木精-伊红染色、Masson染色观察组织生长情况,评价支架的血液相容性和组织再生能力。结果:①粘接交联的小肠黏膜下层血管支架爆破压:在湿润状态的爆破压可达22.1kPa;溶血率为1.4%;细胞毒性评级为0～1级。②支架溶血率和细胞毒性:体外溶血及细胞毒性试验均表明碳化二亚胺交联小肠黏膜下层管具有良好的生物相容性,完全符合医用生物材料的应用要求。③植入兔体内后支架通畅性和组织学表现:植入替代兔颈总动脉缺损后2个月,粘接交联支架的通畅率为83.3%(10/12),明显高于缝制支架的33.3%(4/12)(P<0.05);在通畅血管中动脉瘤样扩张的发生率,缝制支架为100%(4/4),粘接交联支架仅为20%(2/10)。所有通畅的血管在术后1个月时均有完整平滑的内膜形成和平滑肌细胞长入;2个月时平滑肌细胞增多,小肠黏膜下层的胶原纤维也明显减少;无炎症反应、血管破裂发生。结论:粘接交联法可用于小肠黏膜下层小口径血管支架的制作,可保持支架的良好生物相容性并改善血管重建过程中小肠黏膜下层的力学性质,从而显著提高小肠黏膜下层用于修复小口径血管缺损的成功率。

关键词：肠粘膜血管支架组织构建

Discovery and characterization of a new hydrothermal field at 2°N on the slow-spreading Carlsberg Ridge

在线全文

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2024年第4期42卷 1106-1118页

作者： Zhongyan QIU Yejian wang Xiqiu HAN Honglin LI Xing YU Ruyong CUI Mou LI Xuegang CHEN Jiqiang LIU Key Laboratory of Submarine Geosciences&Second Institute of Oceanography Ministry of Natural ResourcesHangzhou 310012China Qingdao Institute of Marine Geology China Geological SurveyQingdao 266071China School of Earth Science Zhejiang UniversityHangzhou 310027China Ocean College Zhejiang UniversityZhoushan 316021China

A new hydrothermal field(Tianshi)was discovered on the rift valley wall through plume anomaly surveys and geological work conducted in 2012 and 2018 between 2°35′N and 2°43′N of the slow-spreading Carlsberg Ridge(CR).Here,the results of two expeditions conducted to detect and characterize the new hydrothermal field are *** and geochemical data,as well as 14 C ages of a sediment core collected near the field are presented to reveal the hydrothermal *** show that the Tianshi field is a basalt-hosted hydrothermal *** data of the sediments collected near the field indicate a strong hydrothermal contribution,and hydrothermal Fe and Cu fluxes range from 30 to 155 mg/(cm^(2)·ka)and 0.59 to 11.49 mg/(cm^(2)·ka),*** variations in the fluxes of hydrothermal Fe indicate that there have been at least three amplified hydrothermal venting events(H 1,H 2,and H 3)in the Tianshi field over the last 35.2 ka,in 28.6-35.2 ka BP,22.0-27.6 ka BP,and 1.2-11.4 ka BP,*** event H 2 was driven by an increased magmatic production associated with sea level fall during the Last Glacial Maximum,while event H 3 was promoted by tectonic activity associated with a rapid sea level *** study further verified the role of sea level change in modulating hydrothermal activity on mid-ocean ridges.

关键词： plume anomaly sediment core new hydrothermal field hydrothermal history Carlsberg Ridge