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文献计量视角下的长新冠研究现状、热点与趋势

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复旦学报（医学版） 2024年第2期51卷 181-190页

作者：林可吴利俊辛继宾应峻张文宏复旦大学附属华山医院感染科上海200040 国家传染病医学中心上海200040 复旦大学图书馆上海200433 复旦大学循证医学中心上海200032

目的采用文献计量分析对长新冠研究相关文献进行分析,了解该领域的研究现状、热点与趋势。方法基于Web of Science核心合集数据进行文献计量分析,并借助VOSviewer软件将结果可视化,从发文趋势、期刊分布、高被引论文分析、国际科研合作... 详细信息

目的采用文献计量分析对长新冠研究相关文献进行分析,了解该领域的研究现状、热点与趋势。方法基于Web of Science核心合集数据进行文献计量分析,并借助VOSviewer软件将结果可视化,从发文趋势、期刊分布、高被引论文分析、国际科研合作网络以及关键词聚类等角度进行深入分析。结果长新冠话题引发了全球学术界的高度关注,共检索到7877篇文献,总被引频次103389,篇均被引频次13.13。其中美国发文量最多(1780篇,22.59%),中国发文量排第5位(686篇,8.71%)。国际科研合作网络分析结果显示长新冠领域研究形成了以美国、英国、意大利、印度和中国等为主体的国家间的紧密合作;关键词主题聚类提示长新冠领域当前主要研究热点为:临床表现、流行病学特征、危险因素、产生机制、治疗与康复措施及其对公众社会生活的影响等。结论本文分析了长新冠领域的研究现状、热点,并探究了趋势,为该领域相关研究和卫生管理部门提供了借鉴和参考。

关键词：长新冠文献计量分析 VOSviewer 研究现状热点趋势

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碧绿米仔兰茎枝化学成分及其生物活性研究

中成药 2024年第3期46卷 843-850页

作者：千一李如琪吴俊丽李欣张峰河南大学第一附属医院河南开封475000 河南大学中医药研究院药学院河南开封475004

目的研究碧绿米仔兰Aglaia perviridis Hiern茎枝的化学成分及其总抗氧化、神经保护活性。方法碧绿米仔兰茎枝95%乙醇提取物采用硅胶、ODS、半制备HPLC进行分离纯化,根据理化性质及波谱数据鉴定所得化合物的结构。分别采用T-AOC试剂盒... 详细信息

目的研究碧绿米仔兰Aglaia perviridis Hiern茎枝的化学成分及其总抗氧化、神经保护活性。方法碧绿米仔兰茎枝95%乙醇提取物采用硅胶、ODS、半制备HPLC进行分离纯化,根据理化性质及波谱数据鉴定所得化合物的结构。分别采用T-AOC试剂盒及MTT法评价抗氧化活性和神经保护活性。结果从中分离得到21个化合物,分别鉴定为3-epicotillol(1)、丁香酸(2)、棕榈酸(3)、邻苯二甲酸二戊酯(4)、对羟基苯乙酸乙酯(5)、6-甲氧基-7羟基香豆素(6)、1-辛醇(7)、对羟基苯乙酸(8)、(+)-表丁香树脂醇-4-O-β-D-吡喃葡萄糖苷(9)、(+)-丁香脂素-4-O-β-D-吡喃葡萄糖苷(10)、对羟基苯乙酸甲酯(11)、koaburaside(12)、byzantionoside B(13)、槲皮素3-O-α-L-鼠李糖苷(14)、(2R,3R)-(+)-蚁母树苷(15)、(2S,3S)-(-)-蚁母树苷(16)、(+)-南烛木树脂酚-3α-O-β-D-吡喃葡萄糖苷(17)、(+)-异落叶松脂素-9′-O-β-D-吡喃葡萄糖苷(18)、(-)-南烛木树脂酚-3α-O-β-D-吡喃葡萄糖苷(19)、根皮苷(20)、β-谷甾醇(21)。化合物2、9~10、14~20总抗氧化能力为10.300~38.367 U/(mmol·L-1);化合物2、10、17神经保护作用呈浓度依赖性,化合物9、15最佳浓度为50、100μmol/L。结论化合物1~20均首次从该植物中分离得到。化合物2、9~10、14~20具有较强的总抗氧化能力;化合物2、9~10、15、17具有神经保护活性。

关键词：碧绿米仔兰茎枝化学成分分离鉴定抗氧化神经保护

农村社区参与对提升农业可持续性和粮食安全的作用研究

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北方水稻 2024年第2期54卷 67-69页

作者：吴丽君西北大学现代学院西安710130

农村社区作为农业生产的基层单位,其参与程度直接关系到农业可持续性发展和粮食安全的实现。通过深入探讨农村社区参与的重要性,能揭示其对农业可持续发展的推动作用及保障粮食安全的战略意义。农村社区的积极参与不仅能促进生态农业发... 详细信息

农村社区作为农业生产的基层单位,其参与程度直接关系到农业可持续性发展和粮食安全的实现。通过深入探讨农村社区参与的重要性,能揭示其对农业可持续发展的推动作用及保障粮食安全的战略意义。农村社区的积极参与不仅能促进生态农业发展和化肥农药减量化,保护农业生态环境,还能提高土地利用效率和粮食产量,从而增强粮食生产的安全性和可持续性。为进一步强化农村社区的参与作用,应制定相应激励机制,提高农村社区的参与度,并建立有效机制,优化资源配置,持续推动农业科技创新,鼓励农村社区积极引进和应用先进的农业技术,进而以科技创新推动农业的可持续发展和粮食安全。

关键词：农业发展农村社区参与农业可持续性粮食安全

团队认知行为干预在血液透析患者护理中的应用价值

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透析与人工器官 2024年第1期35卷 94-97页

作者：伍丽君上饶市立医院江西上饶334000

目的研究团队认知行为干预在血液透析患者护理中应用价值。方法选取2020年2月-2022年2月在我院接受血液透析治疗的126例患者,根据随机数字表达法将其分为研究组和对照组,每组各63例。对照组行常规护理干预,研究组行团队认知行为干预,观... 详细信息

目的研究团队认知行为干预在血液透析患者护理中应用价值。方法选取2020年2月-2022年2月在我院接受血液透析治疗的126例患者,根据随机数字表达法将其分为研究组和对照组,每组各63例。对照组行常规护理干预,研究组行团队认知行为干预,观察两组患者干预前后心理状态及营养状况。结果干预前,两组患者第二版贝克抑郁量表(Beck depression inventory-Ⅱ,BDI-Ⅱ)评分对比无显著差异(P>0.05);干预后,研究组BDI-Ⅱ评分为(17.21±2.32)分显著低于对照组(18.67±2.36)分(P0.05);干预后,研究组营养不良发生率为7.94%显著低于对照组22.22%(P<0.05)。结论血液透析患者行团队认知行为干预效果较好,可显著改善患者心理状态和营养状况。

关键词：团队认知行为干预血液透析贝克抑郁量表

Effects of Lycium barbarum polysaccharide on the photoinduced autophagy of retinal pigment epithelium cells

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International Journal of Ophthalmology(English edition) 2022年第1期15卷 23-30页

作者： Yuan-Yuan Gao Juan li Jie Huang wu-jun li Yang Yu Ningxia Medical University Yinchuan 750004Ningxia Hui Autonomous RegionChina Yulin Hospital of Traditional Chinese Medicine Yulin 719000Shaanxi ProvinceChina

AIM:To investigate the relationship between autophagy and apoptosis in photoinduced injuries in retinal pigment epithelium(RPE)cells and how Lycium barbarum polysaccharide(LBP)contributes to the increased of RPE cells to photoinduced ***:In vitro cultures of human RPE strains(ARPE-19)were prepared and randomly divided into the blank control,model,low-dose LBP,middle-dose LBP,high-dose LBP,and 3-methyladenine(3MA)*** viability of the RPE cells and apoptosis levels in each group were tested through cell counting kit-8(CCK8)method with a flow cytometer(Annexin V/PI double staining technique).The expression levels of LC3II,LC3I,and P62 proteins were detected with the immunofluorescence *** expression levels of beclin1,LC3,P62,PI3K,P-mTOR,mTOR,P-Akt,and Akt proteins were tested through Western ***:LBP considerably strengthens cell viability and inhibits the apoptosis of RPE cells after *** PI3K/Akt/mTOR signal pathway is activated because of the upregulation of the phosphorylation levels of Akt and mTOR proteins,and thus autophagy is ***:LBP can inhibit the excessive autophagy in RPE cells by activating the PI3K/Akt/mTOR signaling pathways and thereby protect RPE cells from photoinduced injuries.

关键词： autophagy Lycium barbarum polysaccharide retinal pigment epithelial cell photoinduced apoptosis

胫骨平台后外侧骨折的改良后外侧和改良前外侧入路比较

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中国骨与关节杂志 2024年第7期13卷 522-527页

作者：吴利军于洋徐树根王守宝锡山人民医院鹅湖分院骨科江苏省214116

目的探讨改良后外侧和改良前外侧入路在治疗胫骨平台后外侧骨折(posterolateral tibial plateau fracture,PTPF)的效果。方法选取我院在2021年1月至2022年1月收治的68例PTPF患者,采用改良后外侧入路(改良后外侧组,n=34)和改良前外侧入路... 详细信息

目的探讨改良后外侧和改良前外侧入路在治疗胫骨平台后外侧骨折(posterolateral tibial plateau fracture,PTPF)的效果。方法选取我院在2021年1月至2022年1月收治的68例PTPF患者,采用改良后外侧入路(改良后外侧组,n=34)和改良前外侧入路(改良前外侧组,n=34)治疗。比较两组患者关节面塌陷程度、影像学参数、伸屈活动度、美国特种外科医院(Hospital for Special Surgery,HSS)评分和Lysholm评分。结果改良后外侧组患者手术时间大于改良前外侧组患者(P<0.05);术中出血、切口长度和骨折愈合时间低于改良前外侧组患者(P<0.05)。改良后外侧组患者术后6个月、12个月的关节面塌陷高度低于改良前外侧组(P<0.05)。末次随访,改良后外侧组患者的伸和屈活动度以及HSS评分和Lysholm评分高于改良前外侧组患者(P<0.05)。结论改良后外侧入路和改良前外侧入路均能有效治疗PTPF。尽管改良后外侧入路具有更好的治疗效果,但对术者手术经验和专业素质要求较高。

关键词：胫骨骨折骨折固定术内治疗结果

Pion-photon and kaon-photon transition distribution amplitudes in the Nambu–Jona-Lasinio model

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Chinese Physics C 2024年第8期48卷 94-103页

作者： Jin-li Zhang jun wu Department of Mathematics and Physics Nanjing Institute of TechnologyNanjing 211167China National Laboratory of Solid State Microstructures Department of PhysicsNanjing UniversityNanjing 210093China

The Nambu–Jona-Lasinio model is utilized to investigate the pion-and kaon-photon leading-twist transition distribution amplitudes using proper time ***,the properties of the vector and axial vector pion-photon transition distribution amplitudes are examined,and the results meet the desired *** study involves sum rule and polynomiality *** vector and axial vector pion-photon transition form factors that are present in theπ^(+)→γe^(+)νprocess are the first Mellin moments of the pion-photon transition distribution *** vector transition form factor originates from the internal structure of hadrons,the axial current can be coupled to a pion,this pion is virtual,and its contribution will be present independently of the external *** kaon transition form factors are *** vector form factor's value at zero momentum transfer is determined by the axial anomaly,while this is not the case for the axial *** vector and axial form factors,as well as the neutral pion vector form factor F_(πγγ)(t),are *** to our findings,the pion axial transition form factor is harder than the vector transition form factor and harder than the electromagnetic form *** also discuss the link betweenπ−γandγ−πtransitions distribution amplitudes.

关键词： transition form factors NJL model transition distribution amplitudes

Effect of proppant sizes and injection modes on proppant transportation and distribution in the tortuous fracture model

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Particuology 2024年第1期84卷 261-280页

作者： jun li Xu Han Siyuan He Mingyi wu Xin Huang Nianyin li State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500China Chongqing Industry Polytechnic College Chongqing401120China Sichuan Particles Energy and Technology Co. LtdChengdu611630China Engineering Technology Research Institute of PetroChina Southwest Oil and Gas Field Company Chengdu610017China

Particle-fluid transport and placement mechanism in tortuous fracture played a crucial role in uncon-ventional ***,most studies focused on mono-size proppant with fluid transport pro-cesses in tortuous ***,the mixture-size proppant with fluid movement mechanism in tortuous fracture was still ***,this study designed and applied a series of experiments with a physical analog model of a tortuous fracture with 120°and 90°-angled bends and combined high-speed camera-based *** experimental system was used to track different-mixture-sized proppant particle motion trajectories for a series of proppant injection schemes;The following conclu-sions were drawn from this study:*** pile-up processes mechanism in all investigated schemes were similar and could be reduced to four main *** packing structure at both sides of the fracture wall had different variation rates,which were controlled by the mix ratio(change from 1∶1-1∶5)of proppant *** new packing patterns,such as Zebra Stripe,had occurred,controlled by the different proppant injection ***-sized mono-proppant(30/50 mesh)had the highest transport efficiency in the tortuous fracture,followed by the mixed-sized multi-proppant(10/20 mesh:30/50 mesh),large-sized proppant(10/20 mesh)was the *** optimized alternating in-jection mode was recommended as injecting small-sized proppant first(30/50 mesh)and followed by mixed-sized multi-proppant(10/20 mesh:30/50 mesh),which could contribute to obtaining the optimal both proppant packing height and travel distance in tortuous *** correlations were devel-oped for predicting the proppant packing height and transportation distance.

关键词： Tortuous fracture model Mixed-sized proppant Multi-sized proppant injection mode Proppant motion and distribution Packing mechanism

Enhanced hydrogen evolution reaction in FePt film with remanence due to decrease in domain walls

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Rare Metals 2024年第3期43卷 1108-1115页

作者： Hong Hong Dong-Xue liu jun li jun-Ming li li-Qian wu Bo Yang Qing-Qi Cao Dun-Hui Wang National Laboratory of Solid State Microstructures Collaborative Innovation Center of Advanced MicrostructuresJiangsu Provincial Key Laboratory for NanotechnologySchool of PhysicsNanjing UniversityNanjing210093China Hangzhou Dianzi University Hangzhou310018China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) School of Material Science and EngineeringNortheastern UniversityShenyang110819China

As an effective strategy to improve the properties of electrocatalysts,magnetic field-assisted electrocatalytic water splitting has attracted increasing attention ***,the corresponding enhancements mostly depend on the exertion of an external magnetic field during electrochemical reactions,which results in a high cost of industrial production,and makes the magnetic field manipulation of electrocatalysis become a challenging *** this work,instead of the external magnetic field,a bias magnetic field is self-supplied by the remanence state of a ferromagnetic electrocatalyst of *** to the assistance of this bias magnetic field,the FePt film in the remanence state shows the overpotential of 229 mV during hydrogen evolution reaction,which is much lower than that in its demagnetization state(283 mV).Our findings demonstrate that the remanence in ferromagnetic electrocatalysts can improve the catalytic performance,which is attributed to the decrease in domain walls.

关键词： Remanence Magnetic domains Electrocatalysis Hydrogen evolution reaction(HER)