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Thermodynamic Modelling of Ore-Forming Mechanism of the Changkeng Gold-Silver Deposits in Guangdong Province

Acta Geologica Sinica(English Edition) 1997年第4期71卷 433-445页

作者： zhang sheng, li tongjin and wang liankuiguangzhou institute of geochemistry, chinese academy of scienceswushan, Guangzhou 51064. Guangzhou institute of geochemistry Chinese Academy of Sciences Wushan Guangzhou 510640 [?]zhang sheng Born in 1967 graduated from China University of Geosciences (Wuhan) in 1989 and acquired the master's and doctor's degrees in chinese academy of Sciences (CAS) and Guangdong institute of geochemistry CAS in 1992 and 1996 successively. He is now engaged in studies of metallic ore deposits geochemical thermodynamics and experimental geochemistry.

The Changkeng gold-silver deposits consist of a sediment-hosted, disseminated gold deposit and a replacement-type silver deposit. The mineralizations of gold and silver are zoned and closely related to the silicification of carbonate and clastic rocks, so that siliceous ores dominate in the deposit. The mineralizing temperature ranges mainly from 300 to 170℃, and K+, Na+, Ca2+, Mg2+, and Cl- are the major ions in the ore-forming fluid. Calculations of distribution of metal complexes show that gold is mainly transported by hydrosulphide complexes, but chloride complexes of silver, iron, lead, and zinc, which are transformed into hydroxyl and hydrosulphide complexes under neutral to weak-alkaline circumstances in the late stage, predominate in the ore-forming solutions. Water-rock interaction is confirmed to be the effective mechanism for the formation of silver ores by computer modelling of reaction of hydrothermal solution with carbonate rocks. The solubility analyses demonstrate that the precipitation of gold and silver-bearing minerals taking place under weak-acid conditions and near-neutral to weak-alkaline conditions, respectively, is the main or favourable factor for the ore zonation and separation between gold and silver.

关键词： computer modelling transport form of element water-rock interaction mineral precipitation gold-silver deposit Guangdong province

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Dual-stimuli responsive photonic barcodes based on perovskite quantum dots encapsulated in whispering-gallery-mode microspheres

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Journal of Materiomics 2023年第3期9卷 423-430页

作者： Baoyuan Xu Shuo Yang Xingwei Feng tongjin zhang Zhenhua Gao Yong sheng Zhao School of Materials Science&Engineering Qilu University of Technology(Shandong Academy of Sciences)3501 Daxue RoadChangqing DistrictJinan250353Shandong ProvinceChina Key Laboratory of Photochemistry Institute of ChemistryChinese Academy of SciencesBeijing100190China

Micro/nanoscale photonic barcodes hold great potential for broad applications in items tracking,mul-tiplexed bioassays and *** ever-increasing demand in advanced anti-counterfeiting applications calls for micro/nanoscale barcodes with accurate recognition,large encoding capacity and high security ***,we proposed a strategy to construct the dual-stimuli responsive photonic barcodes based on the perovskite quantum dots(PQDs)doped polymer whispering-gallery-mode(WGM)microcavities via swelling-deswelling *** from the well-defined spherical microcavities,the photoluminescence(PL)spectra of as-prepared composites exhibit a series of sharp peaks characteristics resulting from the effective WGM modulation,which constitutes the fingerprint of a specific resonator and thus allows a definition of photonic *** this basis,we achieved responsive photonic barcodes based on the volatile polar-solvent-controlled luminescence in the mi-crospheres benefitting from the space-confined microcavities and the ionic feature of the ***-over,the light-controlled photonic barcodes have further been acquired through reversibly regulating the inactivation and activation of the energy transfer(ET)process between the PQDs and photochromic *** well-established protocols of PQDs@WGM enable the development of distinct responsive barcodes with multi-responsive features,which will pave an avenue to new types of flexible WGM-based components for optical data recording and security labels.

关键词： Responsive photonic barcodes Perovskite quantum dots Whispering-gallery-mode microsphere Anti-counterfeiting

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Pan-genome of Raphanus highlights genetic variation and introgression among domesticated,wild,and weedy radishes

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Molecular Plant 2021年第12期14卷 2032-2055页

作者： Xiaohui zhang tongjin liu Jinglei wang Peng wang Yang Qiu Wei Zhao Shuai Pang Xiaoman li Haiping wang Jiangping Song Wenlin zhang Wenlong Yang Yuyan Sun Xixiang li Key Laboratory of Biology and Genetic improvement of Horticultural Crops Ministry of AgricultureInstitute of Vegetables and FlowersChinese Academy of Agricultural SciencesBeijing 100081China College of Horticulture Jinling Institute of TechnologyNanjing 210038China institute of Vegetables Research Zhejiang Academy of Agricultural SciencesHangzhou 310021China Berry Genomics Corporation Beijing 100015China

Post-polyploid diploidization associated with descending dysploidy and interspecific introgression drives plant genome evolution by unclear *** is an economically and ecologically important Brassiceae genus and model system for studying post-polyploidization genome evolution and ***,we report the de novo sequence assemblies for 11 genomes covering most of the typical sub-species and varieties of domesticated,wild and weedy radishes from East Asia,South Asia,Europe,and *** among the species,sub-species,and South/East Asian types coincided with Quaternary glaciations.A genus-level pan-genome was constructed with family-based,locus-based,and graph-based methods,and whole-genome comparisons revealed genetic variations ranging from single-nucleotide polymorphisms(SNPs)to inversions and translocations of whole ancestral karyotype(AK)*** gene flow occurred between wild,weedy,and domesticated *** fre-quencies of genome reshuffling,biased retention,and large-fragment translocation have shaped the genomic *** variety-specific gene-rich blocks showed large structural *** translocation and tandem duplication of dispensable genes were revealed in two large rearrangement-rich *** resistance genes mostly resided on specific and dispensable *** causing the loss of function of enzymes modulating gibberellin deactivation were identified and could play an important role in phenotype divergence and adaptive *** study provides new insights into the genomic evolution underlying post-polyploid diploidization and lays the foundation for genetic improve-ment of radish crops,biological control of weeds,and protection of wild species'germplasms.

关键词： Raphanus pan-genomes post-polyploid diploidization gene flow speciation

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Opportunity Inequality in Income Gap of China-A Decomposition Based on Regression Equation

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China Finance and Economic Review 2020年第2期9卷 47-67页

作者： Chen wang tongjin zhang Guanghua Wan Shanghai University of Finance and Economics China Tianjin University of Commerce China institute of World Economy Fudan UniversityChina

Using China General Social Survey(CGSS)data and a decomposition method based on regression equation,this paper decomposes the reasons for income gap in urban areas,rural areas and the whole country in general into three factors-opportunity inequality stemming from environmental factors,income inequality stemming from effort factors,and income inequality from luck and unknown *** results are as follows.(1)From 2010 to 2015,opportunity inequality on a national,urban and rural scale went up first and down later,with a rising contribution from Hukou(household registration)at birth.(2)Estimate shows that China’s opportunity inequality was 24.39%in 2010,28.04.in 2012,peaks at 35.72%in 2013 and falls to 30.56%in 2015,but the percentages would be 8%overestimated if Party membership,migration,and the interactions between environmental and effort factors are excluded.(3)In the 2010-2015 period,the average opportunity inequality in rural areas was 33.31%,about eight percentage points higher than in urban *** age and gender can explain the high rate in rural areas,difference in the place of residence is the main reason for inequality in urban ***,this paper proposes three ways to mitigate opportunity inequality-coordinating regional development,improving fair competition in employment,and accelerating the reform of Hukou system.

关键词： opportunity inequality income gap inequality decomposition environmental factors

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Coupling effects of tungsten and molybdenum on microstructure and stress-rupture properties of a nickel-base cast superalloy

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Progress in Natural Science:Materials International 2018年第1期28卷 45-53页

作者： tongjin Zhou Wei Feng Huibin Zhao Yu Meng Huaxia zhang Hongsheng Ding Zichen wang National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology Beijing institute of Aeronautical Materials

In order to comprehensively understand the forming mechanism of abnormal phases solidified in a nickel-base cast superalloy with additives of tungsten and molybdenum, the coupling effects of W and Mo on the microstructure and stress-rupture properties were investigated in this paper. The results indicated that the precipitation of primary α-（W, Mo） phase depended tremendously on the amount of W and Mo addition. When the total amount of W and Mo was greater than 5.79 at%, α-（W, Mo） phase became easily precipitated in the *** increasing of Mo/W ratio, the dendrite-like α-（W, Mo） phases were apt to convert into small bars or blockylike phases at the vicinities of γ′/γ eutectic. The morphological changes of α-（W, Mo） phase can be interpreted as the non-equilibrium solidification of W and Mo in the alloy. Since the large sized α-（W, Mo） phase has detrimental effects on stress-rupture properties in as-cast conditions, secondary cracks may mainly initiate at and then propagate along the interfaces of brittle phases and soft matrix. During exposing at 1100 ℃ for 1000 h, the α-（W, Mo） phases transformed gradually into bigger and harder M;C carbide, which results in decreasing of stress-rupture properties of the alloy. Finally, the alloy with an addition of 14.-1Mo（wt%） maintained the longest stress lives at high temperatures and therefore it revealed the best microstructure stability after 1100 ℃/1000 h thermal exposure.

关键词： Superalloy Tungsten and molybdenum Cast Microstructure Stress-rupture properties

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胆囊胆固醇沉积症对胆囊结石形态的影响

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中华医学杂志 2024年第23期104卷 2179-2183页

作者：张红雷孔祥余项雨凯邱晨张诚达选博吕贝宁王玉彬胡海田伏洲杨玉龙同济大学附属东方医院胆石病中心同济大学医学院胆石病研究所上海200120 西部战区总医院全军普通外科中心成都610083

目的探讨胆囊胆固醇沉积症对胆囊结石形态的影响。方法回顾性纳入2020年12月至2021年10月在同济大学附属东方医院胆石病中心行胆囊切除术的胆囊结石患者,根据胆囊结石形态,分为病例组(泥沙样结石)和对照组(非泥沙样结石),比较2组患者的... 详细信息

目的探讨胆囊胆固醇沉积症对胆囊结石形态的影响。方法回顾性纳入2020年12月至2021年10月在同济大学附属东方医院胆石病中心行胆囊切除术的胆囊结石患者,根据胆囊结石形态,分为病例组(泥沙样结石)和对照组(非泥沙样结石),比较2组患者的临床基线特征;通过多因素logistic回归分析影响胆囊结石形态的相关因素。结果共纳入110例患者,病例组30例,男13例,女17例,年龄26~73(54.14.岁;对照组80例,男24.,女56例,年龄18~75(4.±13)岁,病例组的年龄高于对照组(P=0.003)。病例组的隐匿性胰胆反流(OPBR)发生率高于对照组[33.3%(10/30)比13.8%(11/80),P=0.020];胆囊胆固醇沉积症发生率低于对照组[30.0%(9/30)比73.8%(59/80),P4.,P=0.001)是泥沙样结石的相关因素。结论胆囊胆固醇沉积症导致不同形态的胆囊结石的形成,促进“固体形结石”的发生发展。

关键词：胆囊结石病胆囊胆固醇沉积症隐匿性胰胆反流

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机会不均等、社会资本与农民主观幸福感——基于CGSS数据的实证分析

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上海财经大学学报（哲学社会科学版） 2020年第5期22卷 94-108页

作者：张彤进万广华天津商业大学经济学院天津300134 复旦大学世界经济研究所上海200433

文章基于CGSS 2013年及2015年数据,运用多重中介效应模型,探讨机会不均等、社会资本与农民主观幸福感的关系。研究结果表明,随着机会不均等的扩大,农民主观幸福感会下降,但社会信任和社会网络有助于提升农民主观幸福感;如果不考虑公共... 详细信息

文章基于CGSS 2013年及2015年数据,运用多重中介效应模型,探讨机会不均等、社会资本与农民主观幸福感的关系。研究结果表明,随着机会不均等的扩大,农民主观幸福感会下降,但社会信任和社会网络有助于提升农民主观幸福感;如果不考虑公共服务获得机会和各维度的权重,机会不均等对农民主观幸福感产生的消极影响会被低估;社会资本作为机会不均等影响农民主观幸福感的一个传导渠道,主要是通过社会信任实现的,社会网络的中介作用并不显著。基于此,建议政府在基础公共服务领域,如教育和医疗方面加大资金投入力度,并通过宣传教育、加大政府政策实施透明度等方式推进农村地区诚信建设。

关键词：机会不均等主观幸福感社会资本社会信任社会网络

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家庭金融市场参与能改善教育的代际流动性吗?

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经济评论 2019年第3期 74-88页

作者：张彤进万广华天津商业大学经济学院复旦大学世界经济研究所

随着越来越多的家庭参与到金融市场,金融是否能够弱化教育代际传递效应,从而改善教育的代际流动性?本文通过构建两期代际交叠模型,分析了家庭金融市场参与对教育代际流动性的影响,并基于中国家庭金融调查数据检验了理论模型的预测。结... 详细信息

随着越来越多的家庭参与到金融市场,金融是否能够弱化教育代际传递效应,从而改善教育的代际流动性?本文通过构建两期代际交叠模型,分析了家庭金融市场参与对教育代际流动性的影响,并基于中国家庭金融调查数据检验了理论模型的预测。结果表明,家庭金融市场参与显著降低了父代对子代教育的影响,教育代际流动性能够得到明显改善;并且,将家庭金融市场参与进一步分为金融资产和金融负债两个维度,发现持有金融负债对于提升教育代际流动性有更为重要的作用。这一系列的发现在考虑内生性、分样本回归、改变变量度量方式等情况下仍然稳健。据此,本文建议应积极推动普惠金融的发展,持续扩大金融服务的覆盖率和可获得性,并加强金融知识的普及与宣传。与此同时,全社会应为个体提供更多的教育机会。

关键词：教育代际流动性教育机会金融市场参与普惠金融地区差异

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萝卜乙烯合成途径基因的鉴定及对胁迫的响应

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西北植物学报 2022年第4期42卷 558-568页

作者：刘同金徐铭婕崔群香张爱慧包崇来王长义金陵科技学院园艺园林学院南京210038 浙江省农业科学院蔬菜研究所杭州310021

该研究通过生物信息学方法,对萝卜(Raphanus sativus L.)乙烯合成途径关键结构基因(MAT、ACS和ACO)家族成员进行鉴定,并利用转录组数据和荧光定量方法探究其组织表达和对生物及非生物胁迫的响应。结果表明:(1)萝卜基因组中包含8个MAT、1... 详细信息

该研究通过生物信息学方法,对萝卜(Raphanus sativus L.)乙烯合成途径关键结构基因(MAT、ACS和ACO)家族成员进行鉴定,并利用转录组数据和荧光定量方法探究其组织表达和对生物及非生物胁迫的响应。结果表明:(1)萝卜基因组中包含8个MAT、16个ACS和7个ACO基因,均可分为3个亚家族。(2)这些基因启动子中至少含有1个光响应顺式作用元件;除ACO1.1和ACO3外,其余基因启动子中均至少含有一种响应植物激素的顺式作用元件;多个基因启动子中含有响应生物及非生物胁迫的顺式作用元件。(3)转录组数据分析发现,萝卜所有MAT、ACS6.1和ACO2/3/4.叶片中均具较高的表达量;根癌农杆菌侵染诱导抗病萝卜的MAT2-4.ACS2/7.1/7.2和ACO1.1/1.2/4.著上调表达,而感病材料多个基因下调表达;铅、镉和铬胁迫均显著促进MAT4.2和ACO1.1/4.表达,但抑制MAT1和ACO5.1的表达;4.低温显著抑制MAT2.1/2.2/4.1和ACO1.1/5.2的表达。(4.qRT-PCR分析表明,NaCl和PEG-6000均显著促进ACO5.1/5.2的表达,但抑制MAT4.1和ACO4.表达;果糖和蔗糖可能参与了萝卜对PEG-6000胁迫的响应。该结果为研究萝卜乙烯合成途径基因家族成员的功能奠定了基础。

关键词：乙烯基因表达冷胁迫重金属胁迫根癌农杆菌侵染

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萝卜花青素研究进展

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中国蔬菜 2022年第1期 22-30页

作者：刘同金李锡香刘良峰张爱慧崔群香王长义金陵科技学院园艺学院江苏南京210038 中国农业科学院蔬菜花卉研究所北京100081 江宁区农业农村局江苏南京211100

萝卜是我国重要的蔬菜作物,富含花青素的萝卜品种色泽鲜艳,营养价值高。萝卜花青素种类多,遗传复杂,虽然在种类鉴定和提取方面取得了较多进展,但在基因功能验证和表达调控方面的研究远远落后于模式作物。本文总结了近年来国内外研究者... 详细信息

萝卜是我国重要的蔬菜作物,富含花青素的萝卜品种色泽鲜艳,营养价值高。萝卜花青素种类多,遗传复杂,虽然在种类鉴定和提取方面取得了较多进展,但在基因功能验证和表达调控方面的研究远远落后于模式作物。本文总结了近年来国内外研究者在萝卜花青素种类的鉴定,结构基因及转录因子的挖掘,影响萝卜花青素合成的因素及花青素提取方面取得的进展,以期为萝卜花青素相关研究提供参考。

关键词：萝卜花青素生物合成调控提取工艺研究进展

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