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桂东北胡家田萤石矿床稀土元素地球化学特征及其指示意义

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桂林理工大学学报 2023年第1期43卷 52-60页

作者：李根方贵聪冯佐海黄振男罗桥花黄祥林蒋松林桂林理工大学地球科学学院广西桂林541006 桂林理工大学广西隐伏金属矿产勘查重点实验室广西桂林541006 北部湾大学石油与化工学院广西钦州535000 广西壮族自治区三一○核地质大队广西桂林541213 广西壮族自治区区域地质调查研究院广西桂林541003

桂东北地区具有丰富的萤石矿资源,矿体主要呈脉状产于花岗岩体中。为揭示桂东北萤石矿的成矿物质来源、成矿物理化学条件和矿床成因,选取该地区典型的脉状萤石矿——胡家田萤石矿开展稀土元素地球化学研究。结果表明,萤石的ΣREE(63.19... 详细信息

桂东北地区具有丰富的萤石矿资源,矿体主要呈脉状产于花岗岩体中。为揭示桂东北萤石矿的成矿物质来源、成矿物理化学条件和矿床成因,选取该地区典型的脉状萤石矿——胡家田萤石矿开展稀土元素地球化学研究。结果表明,萤石的ΣREE(63.19×10^(-6)~117.98×10^(-6))低于围岩(153.78×10^(-6)~217.41×10^(-6)),二者的稀土元素配分型式具有相似性和同步性,均呈现出右倾并伴有强烈Eu负异常(δEu=0.09~0.31),且Sm/Nd值(0.21~0.33)较为接近,表明二者有密切的成因关系。萤石的Eu负异常暗示成矿时流体处于还原环境,且温度较低。萤石的La/Ho值和Y/Ho值无相关性,Y/Ho值几乎恒定,指示萤石为同期形成;Tb/Ca和Tb/La值分布特征指示胡家田萤石矿为热液成因。综合矿床地质特征、稀土元素以及成矿流体特征认为,胡家田萤石矿的成矿物质来源于大气降水对围岩的淋滤作用,该萤石矿属于低温热液断裂充填型萤石矿床。

关键词：萤石矿床稀土元素地球化学花岗岩桂东北

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基于地球化学的广西靖西三合沉积型铝土矿物质来源约束

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矿产与地质 2022年第5期36卷 949-961页

作者：王绪涛陈远荣黄振男蒋婧雯杨静桂林理工大学地球科学学院广西桂林541006

广西靖西三合沉积型铝土矿位于桂西铝土矿成矿带西部,区域上与吞盘寒武系相邻,而三合矿区具有从西南到东北方向矿石品位先升高后降低的特点,为了探究两者之间的关系以及对本区成矿规律的影响,通过主量成分和微量元素进行对比分析,探讨... 详细信息

广西靖西三合沉积型铝土矿位于桂西铝土矿成矿带西部,区域上与吞盘寒武系相邻,而三合矿区具有从西南到东北方向矿石品位先升高后降低的特点,为了探究两者之间的关系以及对本区成矿规律的影响,通过主量成分和微量元素进行对比分析,探讨两者之间的相互关系。结果表明:(1)桂西地区吞盘寒武系Al_(2)O_(3)的含量明显高于辉绿岩Al_(2)O_(3)的含量以及钦甲花岗岩体Al_(2)O_(3)的含量,说明吞盘寒武系具备为三合铝土矿提供物质的基本条件;两者Zr-Hf、Nb-Ta呈高度正相关关系,具有相似的稀土配分曲线,轻重稀土比值、δEu值也很接近,显示出密切的物源供给关系。(2)其沉积环境以海陆交互相—海相沉积为主,并具有中部矿段呈弱还原环境,西南矿段和东北矿段为过渡—弱氧化环境的特征。(3)二叠纪时期海进方向由西南向东北推进,有利于将吞盘隆起的寒武系古风化壳的成矿物质运移到三合地区沉积而成矿,并制约其矿石品位。

关键词：三合沉积型铝土矿吞盘寒武系物质来源广西靖西

Influence of travel speed on microstructure and mechanical properties of wire + arc additively manufactured 2219 aluminum alloy

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Journal of Materials Science & Technology 2020年第2期37卷 143-153页

作者： Yinghui Zhou Xin Lin Nan Kang Weidong huang Jiang Wang zhennan Wang State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China Key Laboratory of Metal High Performance Additive Manufacturing and Innovative Design MIIT ChinaNorthwestern Polytechnical UniversityXi’an 710072China

Wire+arc additive manufacturing(WAAM)was preliminarily employed to fabricate the 2219 aluminum *** influence of the electric arc travel speed(TS)on the macro-morphology,microstructure,and mechanical properties were *** results indicated that as the electric arc TS increased,the size and the volume fraction of equiaxed grain *** high arc TS during WAAM also promoted the precipitation of theθ(Al2Cu)*** volume fractions ofθ’’andθ’phases reached maximum values when TS is 350 and 250 mm/min,*** thermal cycle facilitated the precipitation of theθ’*** addition,the micro-hardness and tensile strength of the alloy were analyzed,and the results indicated that samples fabricated at TS of 350 mm/min possessed finer equiaxed grain and exhibited higher ultimate tensile strength(273.5 MPa)and yield strength(182.9 MPa)compared to those fabricated at 250 mm/min.

关键词： Wire+arc additive manufacturing 2219 aluminum alloy Microstructure Mechanical properties

Progress in densification and toughening of high entropy carbide ceramics

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Journal of Materials Science & Technology 2023年第30期161卷 10-43页

作者： zhennan Cao Jialin Sun Lingtao Meng Keguo Zhang Jun Zhao Zhifu huang Xialun Yun School of Mechanical Electrical&Information EngineeringShandong University(Weihai)Weihai 264209China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Shenzhen Research Institute of Shandong University Shenzhen 518057China Key Laboratory of High Efficiency and Clean Mechanical Manufacture of MOE School of Mechanical EngineeringShandong UniversityJinan 250061China State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and EngineeringXi’an Jiaotong UniversityXi’an 710049China State Key Laboratory for Manufacturing System Engineering School of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710049China

High entropy carbide ceramics(HECC)are solid solution of inorganic compounds with five or more prin-cipal metal *** interests in HECC are dramatically sparked by the enormous possibilities in composition-microstructure-property *** widely acknowledged,HECCs enjoy higher hardness and oxidation/corrosion/wear resistance,as well as lower thermal conductivity than conventional engi-neering carbide ceramics,making them the most potential candidates for state-of-the-art structural and functional applications in extreme service *** the advantages,however,the poor den-sification coupled with low fracture toughness significantly limited the practical applications of *** to the difficulty,the literature available for toughening HECC is woefully *** considera-tion of this insufficiency,we apply towards offer a comprehensive,critical review of the mechanical be-havior of HECC,highlighting the densification enhancing strategies(carbon content,sintering techniques,grain size,sintering aids,etc.)as well as toughening methods including particle toughening,whisker/fiber toughening,synergistic toughening,graphene-carbon nanotube toughening,to further the service reliabil-ity of HECC in practical industrial ***,despite some significant successes,important directions for further development of HECC are given as multi-dimensional gradient HECC,additive man-ufacturing of HECC,processing-composition-microstructure-property relationship prediction and genomes of HECC based on machine learning,and high-throughput computing,etc.

关键词： High entropy carbide ceramic Densification Toughening Mechanical properties

Application of sialic acid/polysialic acid in the drug delivery systems

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Asian Journal of Pharmaceutical Sciences 2014年第2期9卷 75-81页

作者： Ting Zhang zhennan She Zhenjun huang Jing Li Xiang Luo Yihui Deng School of Pharmacy Shenyang Pharmaceutical UniversityShenyang 110016China

The properties of modified biomaterial are gaining more and more importance in drug delivery *** acid(SA)and polysialic acid(PSA)serve as endogenous substances,which are non-immunogenic and *** the same time,SA modification of the drugs/carriers can enhance the uptake of tumor cell and retention in brain;PSA modifi-cation can reduce the immunogenicity of the proteins or polypeptides and increase circulation time of the modified drugs/carriers in the blood,thus achieving active targeting *** properties offer a variety of opportunities for applications in drug delivery *** article summarizes the biological functions of SA and PSA and presents the technologies of SA/PSA modified small molecule drugs,proteins and carriers in drug delivery systems.

关键词： Sialic acid Polysialic acid Drug delivery system Active targeting Circulation time

Metabolomics signature of blood pressure salt sensitivity and its link to cardiovascular disease:A dietary salt-intervention trial

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Science China(Life Sciences) 2024年第8期67卷 1666-1675页

作者： zhennan Lin Jianxin Li Fangchao Liu Jie Cao Shufeng Chen Jichun Chen Keyong huang Yaqin Wang Hongfan Li Yan Wang Jianfeng huang Dongfeng Gu Xiangfeng Lu Key Laboratory of Cardiovascular Epidemiology Department of EpidemiologyFuwai HospitalChinese Academy of Medical Sciences and Peking Union Medical College/National Center for Cardiovascular DiseasesBeijing 100037China Medical School Southern University of Science and TechnologyShenzhen 518055China

Individuals with a high degree of salt sensitivity(SS)have a greater risk of cardiovascular disease(CVD),but whether SS fosters CVD by influencing metabolomics homeostasis remains *** study aimed to reveal the role of the SS-related metabolomics signature in the development of CVDs,based on the MetaSalt study,which was a dietary salt-intervention trial conducted at four centers in China in 2019.A total of 528 participants were recruited and underwent 3 days of baseline observations,a 10-day low-salt intervention,and a 10-day highsalt *** untargeted metabolomics,lipidomics,and BP measurements were scheduled at each *** were grouped into extreme SS,moderate SS,and salt-resistant(SR)individuals according to their BP responses to *** mixed models were used to identify SS-related metabolites and determine the relationship between the SS-related metabolomics signature and arterial *** randomization(MR)analyses were applied to establish the causal pathways among the SS-related metabolites,BP,and *** the 713 metabolites,467 were significantly changed after the high-salt *** them,the changes in 30 metabolites from the low-salt to the high-salt intervention differed among the SS *** the remaining nonsalt-related metabolites,the baseline levels of 11 metabolites were related to *** 41 metabolites explained 23%of the variance in ***,SS and its metabolomics signature were positively correlated with arterial *** analyses demonstrated that the SS-related metabolites may affect CVD risk by altering BP,indicating that the increase in BP was the consequence of the changes in SS-related metabolites rather than the *** study revealed that the metabolomics signature of SS individuals differs from that of SR individuals and that the changes in SS-related metabolites may increase arterial stiffness and foster *** study provides insight into understanding the biolog

关键词： salt sensitivity dietary salt intake metabolomics Mendelian randomization cardiovascular disease

广东大宝山铜多金属矿床伴生碲铋矿物特征及其指示意义

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矿产与地质 2022年第5期36卷 962-970页

作者：邓明华方贵聪赵如意陈远荣张宏吴家旭黄振男杨蕊嘉莫连桂林理工大学地球科学学院广西隐伏金属矿产勘查重点实验室广西桂林541006 东华理工大学核资源与环境国家重点实验室江西南昌330013 广西壮族自治区三〇五核地质大队广西柳州545005

铋、碲金属元素作为广东大宝山铜多金属矿床中的两种重要伴生矿化组分,其赋存状态及成因研究较为薄弱。通过野外系统地质采样、详细岩矿鉴定和电子探针成分分析,查明了铋、碲元素在该矿床中主要呈独立矿物赋存于金属硫化物内部、裂隙或... 详细信息

铋、碲金属元素作为广东大宝山铜多金属矿床中的两种重要伴生矿化组分,其赋存状态及成因研究较为薄弱。通过野外系统地质采样、详细岩矿鉴定和电子探针成分分析,查明了铋、碲元素在该矿床中主要呈独立矿物赋存于金属硫化物内部、裂隙或边缘,形成的碲铋矿物种类丰富,主要包括自然铋、硫碲铋矿B、叶碲铋矿、辉铋矿、碲银矿、碲铋矿、辉碲铋矿、赫碲铋矿、萨硫碲铋铅矿和应硫碲铋矿等。自然铋的矿物颗粒结晶粗大,形成环境相对稳定,是Bi的主要赋存形式之一,且常常出现自然铋和辉铋矿共存。Bi主要来源于燕山期中酸性岩浆热液和部分围岩中矿化元素的活化,Te的来源与深部岩浆活动或地幔物质有着密切关系。燕山期岩浆热液携带了大量含矿流体上升,当高温热液演化到中温时,Bi、Te金属元素便逐渐富集、沉淀而成矿。

关键词：大宝山矿床碲铋矿物成因矿物学电子探针广东

Progress involving new techniques for liposome preparation

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Asian Journal of Pharmaceutical Sciences 2014年第4期9卷 176-182页

作者： Zhenjun huang Xuan Li Ting Zhang Yanzhi Song zhennan She Jing Li Yihui Deng School of Pharmacy Shenyang Pharmaceutical UniversityNo.103Wenhua RoadShenyang 110016China

The article presents a review of new techniques being used for the preparation of liposomes.A total of 28 publications were *** addition to the theories,characteristics and problems associated with traditional methods,the advantages and drawbacks of the latest techniques were *** the light of developments in many relevant areas,a variety of new techniques are being used for liposome preparation and each of these new technique has particular advantages over conventional preparation ***,there are still some problems associated with these new techniques that could hinder their applications and further improvements are *** speaking,due to the introduction of these latest techniques,liposome preparation is now an improved *** applications promote not only advances in liposome research but also the methods for their production on an industrial scale.

关键词： Liposome Supercritical fluid Dual asymmetric centrifugation Membrane contactor Cross-flow filtration Freeze drying

Enrichment of anchoring sites by introducing supramolecular halogen bonds for the efficient perovskite nanocrystal LEDs

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Light(Science & Applications) 2023年第10期12卷 2122-2130页

作者： Po Lu Ting Li Min Lu Cheng Ruan Siqi Sun zhennan Wu Yuan Zhong Fujun Zhang Yanbo Gao Yaowei huang Yang Wang Junhua Hu Fengping Yan Yu Zhang State Key Laboratory of Integrated Optoelectronics and College of Electronic Science and Engineering Jilin UniversityChangchunChina School of Electronic and Information Engineering Beijing Jiaotong UniversityBeijingChina Changchun Cedar Electronics Technology Co. Ltd.ChangchunChina Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchunChina Key Laboratory of Materials Physics of Ministry of Education Department of Physics and Engineering Zhengzhou UniversityZhengzhouChina

Considering the multi-functionalization of ligands,it is crucial for ligand molecular design to reveal the landscape of anchoring ***,a typical triphenylphosphine(TPP)ligand was employed to explore its effect on the surface of CsPbI_(3)perovskite nanocrystals(PNCs).Except for the conventionally considered P-Pb coordination,an P-I supramolecular halogen bonding was also found on the NC *** coexistence of the above two types of bonding significantly increased the formation energy of iodine vacancy defects and improved the photoluminescence quantum yield of PNCs up to 93%.Meanwhile,the direct interaction of P and I enhanced the stability of the Pb-I octahedra and dramatically inhibited the migration of I ***,the introduction of additional benzene rings(2-(Diphenylphosphino)-biphenyl(DPB))increased the delocalized properties of the PNC surface and significantly improved the charge transport of the *** a result,the DPB passivated CsPbI_(3)NCs based top-emitting LEDs exhibite a peak external quantum efficiency(EQE)of 22.8%,a maximum luminance of 15,204 cd m^(−2),and an extremely low-efficiency roll-off of 2.6%at the current density of 500 mA cm^(−2).

关键词： halo bonding quantum