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Half-precessional cycle revealed by environment magnetism of stalagmite in Shizhu Cave from southwestern China during the Last Glacial

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Journal of Earth Science 2024年

作者： Huihui Yang Yu-Min chou Xiuyang Jiang Wenyue Xia Hai Li Yi Zhong Jingyu Zhang Yaoqi He Tsai-Luen Yu Qingsong Liu chuan-chou shen College of Tourism and Air Service， Guizhou Minzu University Research Center for Future Earth， Taiwan University Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) School of Environment， Harbin Institute of Technology High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC)， Department of Geosciences， Taiwan University Key Laboratory of Humid Subtropical Eco-Geographical Processes， College of Geography Science， Fujian Normal University Center for Marine Magnetism (CM2)， Department of Ocean Science and Engineering， Southern University of Science and Technology

The environmental magnetic proxies of stalagmites hold significant potential for reconstructing regional hydroclimate changes by revealing the content and grain size of magnetic particles within stalagmites. In this study， we present the contents and grain sizes of magnetic particles within a stalagmite SZ-1， from Shizhu Cave in southwestern China from 70.4 to 22.3 thousand years ago (ka) during the last glacial period. Specifically， the parameters IRMsoft， soil-derived magnetic minerals， and ARM/SIRM (anhysteretic remanent magnetization/saturation isothermal remanent magnetization)， the ratio of fine magnetic particles to total ferrimagnetic particles preserved in stalagmite SZ-1， indicate the fluctuation of regional precipitation. Obvious half-precessional cycles are evident in these two proxies， indicating that hydroclimatic variations in southwestern China may predominantly arise from the heat and moisture transported from tropical oceans. These variations are likely influenced by shifts in the Intertropical Convergence Zone and fluctuations in the Asian summer monsoon.

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Great flood in the middle-lower Yellow River reaches at 4000 a BP inferred from accurately-dated stalagmite records

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Science Bulletin 2018年第4期63卷 206-208页

作者： Liangcheng Tan chuan-chou shen Yanjun Cai Hai Cheng R.Lawrence Edwards State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Open Studio for Oceanic-Continental Climate and Environment Changes Qingdao National Laboratory for Marine Science and Technology Institute of Global Environmental Change Xi’an Jiaotong University High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC) Department of Geosciences Taiwan University Department of Earth Sciences University of Minnesota

Recently,Wu et al.[1]suggested an earthquake-induced landslide dam outburst flood on the eastern Tibetan Plateau at 1920BCE(3870 a BP,BP denotes year before 1950 CE)caused the Great Flood in the middle-lower Yellow River reaches,and resulted in the founding of Xia Dynasty at 3850 a *** age is$150–300younger than the previously estimated age of the Xia Dynasty[2].While the geological evidence of the outburst flood。

关键词：石笋记录活动范围大洪水 BP 黄河黄土高原 BCE 幻灯片

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Speleothem record of geomagnetic secular dynamics at 35-15 ka

Speleothem record of geomagnetic secular dynamics at 35-15 k...

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2019年中国地球科学联合学术年会

作者： YU-MIN chou Huihui Yang Qingsong Liu Xiuyang Jiang Yaoqi He chuan-chou shen Southern University of Science and Technology Fujian Normal University Guizhou Minzu University National Taiwan University

The paleomagnetic records of secular variation over the last thousand years show the changes in field strength and directional deviation of tens of degrees. Yet the detailed multidecadal-scale geomagnetic behavior, such as the change rate of strength and directional deviation, is still unclear for ages beyond thousands of years. Stalagmite is

关键词： Speleothem record of geomagnetic secular dynamics at 35-15 ka

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Robust tantalum tuned perovskite oxygen electrode for reversible protonic ceramic electrochemical cells

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Rare Metals 2024年第7期43卷 3055-3065页

作者： Yu-Shi Feng Yu shen Fang Wang chuan Tian Qin-Yi Hu Qian Duan Jing-Wei Li Di Bao School of Materials Science and Engineering Changchun University of Science and TechnologyChangchun 130022China Zhongshan Institute of Changchun University of Science and Technology Zhongshan528437China State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied Chemistry Chinese Academy of SciencesChangchun 130022China Key Laboratory of Preparation and Applications of Environmental Friendly Materials Ministry of EducationJilin Normal UniversityChangchun 130103China

Perovskite oxides with diverse composition and structure have exhibited grand advances in boosting the oxygen reduction and evolution reaction(ORR/OER),which are essential for the reversible protonic ceramic electrochemical cell(R-PCEC)toward the sustainable hydrogen production and ***,enhancement of their activity and stability remains ***,we develop the Ta-regulated BaCo_(0.7)Fe_(0.3)O_(3-δ)perovskite oxygen electrode(Ba(Co_(0.7)Fe_(0.3))_(1-x)Ta_xO_(3-δ))with abundant oxygen defects and achieve the simultaneous enhancement in the electrocatalytic activity and stability toward ORR and ***-fabricated R-PCEC with(Ba(Co_(0.7)Fe_(0.3))_(0.9)Ta_(0.1)O_(3-δ))(BCFT10)oxygen electrode performs high power density of 1.47 W·cm^(-2)at 650℃in fuel cell mode,and the current density is up to-2.11 A·cm^(-2)at 1.4 V at 650℃in electrolysis mode,as well as the good stability in both the fuel cell and electrolysis ***,the cell also demonstrates a stable cycling operation between fuel cell and electrolysis mode,suggesting a great potential of BCFT10 as oxygen electrode material for R-PCECs.

关键词： Reversible protonic ceramic electrochemical cells Perovskite oxide Oxygen electrode Ta element doping Oxygen defects

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De novo Synthesis of Chiral 3,4-Dihydroquinazolines via One-Pot Enantioselective Ugi-Azide/Cyclization Sequences

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Chinese Journal of Chemistry 2024年第18期42卷 2140-2146页

作者： Zu-Kui Xie Jun-Jun Ding Yi-Ming Ou Jun-Xiu Shi Meng-Lan shen chuan-Zhi Yao Hua-Jie Jiang Jie Yu Department of Applied Chemistry Anhui Province Engineering Laboratory for Green Pesticide Development and Applicationand Anhui Province Key Laboratory of Crop Integrated Pest ManagementAnhui Agricultural UniversityHefeiAnhui 230036China

Background and Originality Content,3,4-Dihydroquinazoline frameworks have frequently been encountered in natural products and bioactive *** the past decades,these key structures prompted the development of creative pharmaceuticals owing to their prominent biological properties,including trypanothione reductase(TryR)inhibitor,Hepatitis B virus(HBV)inhibitive activities,anticancer activities,etc.(Scheme 1A).[1]Notably,the chirality of the C4 atom is crucial for drug *** example,the DPC-083 is a potent reverse transcriptase inhibitor for the treatment of HIV infection but the undesired enantiomers exhibit virtually no activity.[ia]Therefore,developing synthetic methods for innovative chiral 4-substituted 3,4-dihydroquinazolines is significant and essential for drug discovery.

关键词： Anionic stereogenic-at-cobalt(ll)complex De novo synthesis post-Ugi transformation One-pot sequence Asymmetric synthesis Multicomponentreactions

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人类活动和气候变化触发了中国西南石漠化的扩张

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中国科学：地球科学 2021年第11期51卷 1950-1963页

作者：陈朝军袁道先程海 Tsai Luen YU chuan chou shen R.Lawrence EDWARDS 吴尧肖思雅张键王涛黄冉刘子琦李廷勇李俊云西南大学地理科学学院岩溶环境重点实验室重庆400715 中国地质科学院岩溶地质研究所自然资源部/广西岩溶动力学重点实验室桂林541004 云南师范大学地理学部云南省高原地理过程与环境变化重点实验室昆明650500 西安交通大学全球环境变化研究院西安710049 台湾大学地球科学系高精度质谱与环境变化实验室中国台北10617 台湾大学未来地球研究中心中国台北10617 台湾大学全球变化研究中心中国台北10617 Department of Earth Sciences University of MinnesotaMinneapolisMN 55455USA Environnements et Paléoenvironnements Océaniques et Continentaux(EPOC) UMR CNRS5805Universitéde BordeauxPessac 33600France 贵州师范大学喀斯特研究院贵阳550001

研究石漠化扩张的机制,有利于岩溶地区人与自然的可持续发展.中国西南大面积的石漠化是受气候变化还是人类活动的主导仍然存在争议.通过贵州省石将军洞高精度的石笋δ^(13)C记录,本研究重建了过去2000年来中国西南区域的石漠化演变.从... 详细信息

研究石漠化扩张的机制,有利于岩溶地区人与自然的可持续发展.中国西南大面积的石漠化是受气候变化还是人类活动的主导仍然存在争议.通过贵州省石将军洞高精度的石笋δ^(13)C记录,本研究重建了过去2000年来中国西南区域的石漠化演变.从中世纪暖期到小冰期,石将军洞石笋δ^(13)C持续偏重;在同一时期,中国西南区域其他石笋和钙华的δ^(13)C记录都表现出同样显著偏重的趋势.由于石笋δ^(13)C记录能够反映洞穴上部的生态环境变化,因此中国西南区域石笋δ^(13)C一致的变化可能反映了中国西南喀斯特地区石漠化扩张的过程.中世纪暖期亚洲夏季风加强,雨带北移,导致了中国西南干旱,北方湿润;相反,在小冰期中国西南湿润,北方干旱.此外,北宋末年靖康事件(AD1127)后中国政治经济中心首次迁移到中国南方,改变了历史上中国人口北多南少的分布模式.因此,中世纪暖期中国西南干旱的气候和大量人口的迁入、战争、大规模开垦耕地以及大面积农作物的种植,加剧了中国西南石漠化的扩张.

关键词：石漠化靖康事件石笋δ^(13)C 中世纪暖期小冰期

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General Psychiatry 2024年第1期37卷 73-82页

作者： Qian Lu Sisi Huang Tianjiao Zhang Jie Song Manyu Dong Yilun Qian Jing Teng Tong Wang chuan He Ying shen Department of Rehabilitation Medicine The Affiliated Jiangsu Shengze Hospital of Nanjing Medical UniversitySuzhouChina Rehabilitation Medicine Center The First Affiliated Hospital of Nanjing Medical UniversityNanjingChina

Background The neurophysiological differences in cortical plasticity and cholinergic system function due to ageing and their correlation with cognitive function remain poorly *** To reveal the differences in long-term potentiation(LTP)-like plasticity and short-latency afferent inhibition(SAl)between older and younger individuals,alongside their correlation with cognitive function using transcranial magnetic stimulation(TMS).Methods The cross-sectional study involved 31 younger adults aged 18-30 and 46 older adults aged *** participants underwent comprehensive cognitive assessments and a neurophysiological evaluation based on *** function assessments included evaluations of global cognitive function,language,memory and executive *** neurophysiological assessment included LTP-like plasticity and *** The findings of this study revealed a decline in LTP among the older adults compared with the younger adults(wald χ^(2)=3.98,p=0.046).Subgroup analysis further demonstrated a significant reduction in SAl level among individuals aged 70-80 years in comparison to both the younger adults(SAI(N20)):(t=-3.37,p=0.018);SAl(N20+4):(t=-3.13,p=0.038)and those aged 60-70(SAl(N20)):(t=3.26,p=0.025);SAl(N20+4):(t=-3.69,p=0.006).Conversely,there was no notable difference in SAl level between those aged 60-70 years and the younger ***,after employing the Bonferroni correction,the correlation analysis revealed that only the positive correlation between LTP-like plasticity and language function(r=0.61,p<0.001)in the younger group remained statistically *** During the normal ageing process,a decline in synaptic plasticity may precede cholinergic system *** individuals over 60 years of age,there is a reduction in LTP-like plasticity,while a decline in cholinergic system function is observed in those over ***,the cholinergic system may play a vital role in preventing cognitive decline during normal

关键词： function younger plasticity

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Plexin domain-containing 1 may be a biomarker of poor prognosis in hepatocellular carcinoma patients,may mediate immune evasion

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World Journal of Gastrointestinal Oncology 2024年第5期16卷 2091-2112页

作者： Ming-Yue Tang Xue shen Run-sheng Yuan Hui-Yuan Li Xin-Wei Li Yi-Ming Jing Yue Zhang Hong-Hong shen Zi-Shu Wang Lei Zhou Yun-chuan Yang He-Xin Wen Fang Su Department of Medical Oncology The First Affiliated Hospital of Bengbu Medical CollegeBengbu 233000Anhui ProvinceChina Otolaryngology and Head and Neck Surgery The First Affiliated Hospital of Bengbu Medical CollegeBengbu 233000Anhui ProvinceChina Department of Neurology The First Affiliated Hospital of Bengbu Medical CollegeBengbu 233000Anhui ProvinceChina Department of Hepatobiliary Surgery The First Affiliated Hospital of Bengbu Medical CollegeBengbu 233000Anhui ProvinceChina Department of Gastrointestinal Surgery The First Affiliated Hospital of Bengbu Medical CollegeBengbu 233000Anhui ProvinceChina

BACKGROUND For the first time,we investigated the oncological role of plexin domain-containing 1(PLXDC1),also known as tumor endothelial marker 7(TEM7),in hepatocellular carcinoma(HCC).AIM To investigate the oncological profile of PLXDC1 in *** Based on The Cancer Genome Atlas database,we analyzed the expression of PLXDC1 in *** immunohistochemistry,quantitative real-time polymerase chain reaction(qRT-PCR),and Western blotting,we validated our *** prognostic value of PLXDC1 in HCC was analyzed by assessing its correlation with clinicopathological features,such as patient survival,methylation level,tumor immune microenvironment features,and immune cell surface checkpoint ***,to assess the immune evasion potential of PLXDC1 in HCC,we used the tumor immune dysfunction and exclusion(TIDE)website and immunohistochemical staining *** Based on immunohistochemistry,qRT-PCR,and Western blot assays,overexpression of PLXDC1 in HCC was associated with poor *** and multivariate Cox analyses indicated that PLXDC1 might be an independent prognostic *** HCC patients with high methylation levels,the prognosis was worse than in patients with low methylation *** enrichment analysis of HCC tissues indicated that genes upregulated in the high-PLXDC1 subgroup were enriched in mesenchymal and immune activation signaling,and TIDE assessment showed that the risk of immune evasion was significantly higher in the high-PLXDC1 subgroup compared to the low-PLXDC1 *** high-risk group had a significantly lower immune evasion rate as well as a poor prognosis,and PLXDC1-related risk scores were also associated with a poor *** As a result of this study analyzing PLXDC1 from multiple biological perspectives,it was revealed that it is a biomarker of poor prognosis for HCC patients,and that it plays a role in determining immune evasion status.

关键词： Plexin domain-containing 1 Biomarker Immune evasion Prognosis Immunotherapy Hepatocellular carcinoma

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广义类CLEFIA动态密码结构抵抗差分和线性密码分析的安全性评估

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电子学报 2024年第8期52卷 2571-2580页

作者：成磊沈璇任传伦电子科技大学计算机科学与工程学院四川成都611731 中国电子科技网络信息安全有限公司四川成都610041 国防科技大学信息通信学院湖北武汉430010 中国电子科技集团公司第三十六研究所浙江嘉兴314033

基于四分支类CLEFIA动态密码结构,对2m分支类CLEFIA动态密码结构进行分析,证明基于循环变换的类CLEFIA动态密码结构等价于CLEFIA密码结构.对2m分支类CLEFIA动态密码结构最小差分活动轮函数个数的上界进行研究,证明每轮变换P_(i)为基于GF... 详细信息

基于四分支类CLEFIA动态密码结构,对2m分支类CLEFIA动态密码结构进行分析,证明基于循环变换的类CLEFIA动态密码结构等价于CLEFIA密码结构.对2m分支类CLEFIA动态密码结构最小差分活动轮函数个数的上界进行研究,证明每轮变换P_(i)为基于GF(2^(s))上{0,1}构成的动态线性变换,2m分支类CLEFIA动态密码结构最小差分活动轮函数上界为[2^(2m-1)/2^(2m)-1mr],其中,r为轮数.另外,可将上述关于差分性质的结果推广得到类CLEFIA动态密码结构线性性质的结果.

关键词：密码结构类CLEFIA动态密码结构差分密码分析线性密码分析活动轮函数

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根系分泌物对不同环境胁迫响应的研究进展

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核农学报 2024年第11期38卷 2247-2257页

作者：沈川李夏安康学院陕南生态经济研究中心陕西安康725000 安康学院电子信息与工程学院陕西安康725000

植物根系分泌物是指植物根系释放到根际环境中的各种化合物,是根系与周围环境进行物质交换的重要媒介,对植物生长、营养吸收、抵御病害等具有重要作用。在胁迫条件下,根系分泌物参与提高植物资源利用效率作用过程,并可促进植物与土壤微... 详细信息

植物根系分泌物是指植物根系释放到根际环境中的各种化合物,是根系与周围环境进行物质交换的重要媒介,对植物生长、营养吸收、抵御病害等具有重要作用。在胁迫条件下,根系分泌物参与提高植物资源利用效率作用过程,并可促进植物与土壤微生物间的相互作用。本文综述了根系分泌物的组成和转运方式,及其在促进植物营养吸收中的应用;重点综述植物为应对生物和非生物胁迫,调控根系分泌物释放变化动态的研究进展;并讨论种植方式改变所产生的根系分泌物在病虫害防治中的应用。该综述可为深入了解植物根系的生态功能和适应机制提供理论指导。

关键词：根系分泌物生物胁迫非生物胁迫营养吸收根际微生物

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