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Chinese Chemical Letters 2024年第4期35卷 142-146页

作者： lang gao Cen Zhou Rui Wang Feng Lan Bohang An Xiaozhou Huang Xiao Zhang Fujian Key Laboratory of Polymer Science Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical EngineeringCollege of Chemistry and Materials ScienceFujian Normal UniversityFuzhou 350007China Fujian Engineering and Research Center of New Chinese Lacquer Materials College of Materials and Chemical EngineeringMinjiang UniversityFuzhou 350108China

Inverse vulcanized polymers(IVPs) that generated from elemental sulfur and smaller amounts of alkenes have found broad promising applications such as cathode materials for Li-S batteries, dynamic and repairable materials, optics applications, and metal sorption. However, their exploration in organic synthesis is still unprecedented. Here we first report the application of inverse vulcanized polymers in catalysis for organic transformations. A biomass-derived inverse vulcanized polymer(IVP-EAE) is found to be capable of catalyzing cross-coupling reactions in a transition-metal-free fashion under visible *** method allows the direct C–H functionalization of pyrroles and N-arylacrylamides with(hetero)aryl halides, respectively, leading to the formation of two sets of structurally important scaffolds including pyrrole-containing biaryls and 3,3-disubstituted oxindoles with high selectivity. We anticipate this study will not only unveil the new potential of IVPs, but also offer a distinct type of catalysts for organic transformations.

关键词： Cross coupling Inverse vulcanized polymers Metal free Photocatalyst Visible light

Parthenolide enhances the metronomic chemotherapy effect of cyclophosphamide in lung cancer by inhibiting the NF-kB signaling pathway

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World Journal of Clinical Oncology 2024年第7期15卷 895-907页

作者： Zheng Cai lang gao Kai Hu Qi-Ming Wang Department of Internal Medicine The Affiliated Cancer Hospital of Zhengzhou University&Henan Cancer HospitalZhengzhou 450008Henan ProvinceChina Department of Oncology The No.1 Affiliated Hospital of Yunnan University of Traditional Chinese MedicineKunming 650021Yunnan ProvinceChina

BACKGROUND Parthenolide(PTL),a sesquiterpene lactone derived from the medicinal herb Chrysanthemum parthenium,exhibits various biological effects by targeting NF-kB,STAT3,and other *** has emerged as a promising adjunct therapy for multiple *** To evaluate the in vitro and in vivo effect of PTL on cyclophosphamide(CTX)metronomic *** The cytotoxicity of PTL and CTX on Lewis lung cancer cells(LLC cells)was assessed by measuring cell activity and *** anti-tumor efficiency was evaluated using a tumor xenograft mice model,and the survival of mice and tumor volume were ***,the collected tumor tissues were analyzed for tumor microenvironment indicators and inflammatory *** In vitro,PTL demonstrated a synergistic effect with CTX in inhibiting the growth of LLC cells and promoting *** vivo,metronomic chemotherapy com-bined with PTL and CTX improved the survival rate of tumor-bearing mice and reduced tumor growth ***,metronomic chemotherapy combined with PTL and CTX reduced NF-κB activation and improved the tumor immune microenvironment by decreasing tumor angiogenesis,reducing Transforming growth factorβ,andα-SMA positive *** PTL is an efficient compound that enhances the metronomic chemotherapy effects of CTX both in vitro and in vivo,suggesting its potential as a supplementary therapeutic strategy in metronomic chemotherapy to improve the chemotherapy effects.

关键词： Lung cancer Parthenolide Cyclophosphamide Rhythmic chemotherapy NF-κB pathway

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林下三七种植对土壤微生物群落的影响

微生物学通报 2024年第6期51卷 1995-2012页

作者：李京豪黎建强高朗周云西南林业大学生态与环境学院云南昆明650224

【背景】目前,林下三七种植对林地土壤的理化性质及其土著微生物群落结构和功能产生影响的研究比较匮乏。开展林下三七种植对土壤微生物群落影响的研究将对林下三七种植产业发展具有重要的科学指导意义。【目的】分析林下不同生长期的... 详细信息

【背景】目前,林下三七种植对林地土壤的理化性质及其土著微生物群落结构和功能产生影响的研究比较匮乏。开展林下三七种植对土壤微生物群落影响的研究将对林下三七种植产业发展具有重要的科学指导意义。【目的】分析林下不同生长期的三七种植地在雨季、旱季的土壤微生物群落变化特征,阐明林下土壤微生物群落对于三七种植过程的响应规律及其关键影响因子。【方法】选择未种植三七的人工自然林地土壤为对照,以不同生长期的三七种植林地土壤为研究对象,运用高通量测序技术和生物化学分析方法,对林下三七种植过程中林地土壤微生物群落的动态变化进行研究,并在此基础上采用冗余分析法分析土壤微生物群落变化的驱动因子。【结果】自然对照林地和三七种植林地土壤中优势细菌种群以变形菌门(Proteobacteria)为主,优势真菌种群以担子菌门(Basidiomycota)为主,并且有益微生物门和属的相对丰度都呈现增加趋势。自然对照林地中土壤真菌和细菌特有属的个数最少,而两年生三七种植林地土壤真菌和细菌特有属的个数最多,三年生三七种植林地土壤Chao1和ACE指数最高;主坐标分析(principal coordinate analysis,PCoA)结果显示,三七种植林地土壤微生物组成的分布区范围随着种植年份的增加出现偏移,且分布圈范围呈逐年缩小趋势;相较于雨季,旱季土壤微生物组成的分布范围整体表现为更紧密的特征。冗余分析(redundancy analysis,RDA)表明,土壤中全磷和酸性磷酸酶是影响三七种植林地土壤微生物群落变化的主要驱动因素。【结论】林下三七种植过程显著改变了种植地土壤微生物的组成,随着种植年份增加微生物组成分布的范围表现出了逐步偏移和收缩的趋势,雨旱季交替加速了三七种植林地土壤微生物群落组成与结构的分化过程。全磷和酸性磷酸酶是影响土壤微生物群落的主要环境因子。

关键词：三七林下种植微生物群落高通量测序环境因子

博弈视角下京津冀府际合作困境分析与机制优化研究

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华北理工大学学报（社会科学版） 2024年第4期24卷 48-55页

作者：涂宝军王颖孙静文高廊朗郭宪章华北理工大学经济管理学院河北唐山063210 哈尔滨商业大学金融学院黑龙江哈尔滨150028 河北省教师发展与资格认定事务中心河北石家庄050051

中国式现代化背景下,京津冀作为三大增长极之一,肩负着增强我国整体竞争力及引领经济社会发展等重要使命。近年来,京津冀府际间在协同发展战略的推动下取得显著合作成效,其长效化协同机制也在不断探索,但依然存在藩篱,其本质体现在政府... 详细信息

中国式现代化背景下,京津冀作为三大增长极之一,肩负着增强我国整体竞争力及引领经济社会发展等重要使命。近年来,京津冀府际间在协同发展战略的推动下取得显著合作成效,其长效化协同机制也在不断探索,但依然存在藩篱,其本质体现在政府之间的利益博弈。因此,基于博弈论方法构建横向的地方政府间以及纵向的中央政府与地方政府间博弈模型,以剖析京津冀府际合作的博弈关系及其行为,结合发展现状探究京津冀府际合作困境及阻力,最终以优化京津冀府际合作动力、互信、协调、监督与反馈机制推动区域协同一体化稳定及长效发展。

关键词：府际合作京津冀博弈论合作机制

二维斑点追踪成像评估法洛四联症修复术后肺动脉瓣反流经皮肺动脉瓣置换术后心室功能

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中国医学影像学杂志 2024年第10期32卷 1085-1088页

作者：季萌萌林艺霞高朗贺晴谢明星李玉曼华中科技大学同济医学院附属协和医院超声医学科/湖北省影像医学临床医学研究中心分子影像湖北省重点实验室湖北武汉430022

法洛四联症是紫绀型先天性心脏病最常见的病因,并与修复术后肺动脉瓣反流发生率高密切相关,通常需要进行肺动脉瓣置换术。经皮肺动脉瓣置换术治疗肺动脉瓣反流可代替传统的外科手术,并弥补其创伤大的缺点。超声心动图在评价心室功能方... 详细信息

法洛四联症是紫绀型先天性心脏病最常见的病因,并与修复术后肺动脉瓣反流发生率高密切相关,通常需要进行肺动脉瓣置换术。经皮肺动脉瓣置换术治疗肺动脉瓣反流可代替传统的外科手术,并弥补其创伤大的缺点。超声心动图在评价心室功能方面具有重要作用,但传统的超声心动图参数具有一定局限性,本研究拟综述二维斑点追踪成像评估法洛四联症修复术后肺动脉瓣反流患者经皮肺动脉瓣置换术后心室功能的应用进展。

关键词：超声心动描记术斑点追踪成像法洛四联症经皮肺动脉瓣置换术肺动脉瓣闭锁不全综述

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林下三七种植对坡面水土及碳氮流失的影响

西北农林科技大学学报（自然科学版） 2024年第9期52卷 135-146页

作者：周云何霞红黎建强陈奇伯高朗李京豪西南林业大学生态与环境学院云南昆明650224 西南林业大学西南山地森林资源保育与利用教育部重点实验室云南昆明650224

【目的】探究天然降雨条件下不同坡度三七种植林地和自然林地的水土及碳氮流失特征,为林下种植模式的水土及碳、氮流失评估和控制提供理论依据和数据支撑。【方法】采用野外径流小区原位观测试验,以云南省寻甸县三七(Panax notoginseng(... 详细信息

【目的】探究天然降雨条件下不同坡度三七种植林地和自然林地的水土及碳氮流失特征,为林下种植模式的水土及碳、氮流失评估和控制提供理论依据和数据支撑。【方法】采用野外径流小区原位观测试验,以云南省寻甸县三七(Panax notoginseng(Burkill)***)种植林地为研究对象,对2020和2021年天然降雨条件下不同坡度(5°,10°,15°)三七种植林地和自然林地的水土及碳、氮流失特征进行对比分析,并在此基础上对水土及碳、氮流失量与降雨特征和坡度的关系进行探究。【结果】(1)三七种植林地平均总径流量、总土壤流失量分别为17.35 mm/a和14.91 t/(km^(2)·a),比自然林地分别增加了173.79%和249.43%,其中以15°坡面水土流失量最大,分别为24.10 mm/a和24.32 kg/(km^(2)·a)。(2)三七种植林地平均有机碳、全氮(TN)、氨氮(NH_(4)^(+)-N)、硝态氮(NO-3-N)流失量分别为740.62,75.97,9.55和7.26 kg/(km^(2)·a),比自然林地分别显著增加了251.44%,203.15%,220.47%和224.11%,其径流中TN和NH_(4)^(+)-N平均含量分别为0.77和0.33 mg/L。三七种植林地中,以侵蚀泥沙形式流失的有机碳和TN分别占各自总流失量的93.50%和82.01%,以地表径流流失的NH_(4)^(+)-N、NO-3-N分别占各自总流失量的62.09%和87.47%。(3)降雨量、降雨历时、5 min最大降雨强度(I 5)、10 min最大降雨强度(I 10)、30 min最大降雨强度(I 30)均与径流量、土壤流失量及碳、氮流失量呈显著或极显著正相关关系。坡度与水土和碳、氮流失量呈极显著正相关(P0.93)。【结论】三七种植林地土壤侵蚀强度属于微度侵蚀,最大土壤流失量远低于西南土石山区容许土壤流失量,且径流中TN、NH_(4)^(+)-N平均质量浓度分别低于Ⅲ、Ⅱ类地表水环境质量标准限值。三七种植林地水土及碳、氮流失量较自然林地显著增加,且随着坡度的增大急剧增大。建议在缓坡地段种植三七,以减少水土与养分流失。

关键词：林下种植三七种植林水土流失碳氮流失面源污染

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工业产品中元素分析前处理技术浅谈

广州化工 2024年第4期52卷 17-18,48页

作者：王先桥龚姝高浪黄华三峡公共检验检测中心湖北宜昌443000

在化工、机电轻工、建材等工业产品质量监督检验中,微量元素指标是必检项。实验室通常会用到原子吸收分光光度计、原子荧光光谱仪、电感耦合等离子体发射光谱仪等液体进样仪器,对重金属及其他微量元素进行分析。为了能提高准确度,样品... 详细信息

在化工、机电轻工、建材等工业产品质量监督检验中,微量元素指标是必检项。实验室通常会用到原子吸收分光光度计、原子荧光光谱仪、电感耦合等离子体发射光谱仪等液体进样仪器,对重金属及其他微量元素进行分析。为了能提高准确度,样品的前处理至关重要。基于此,本文总结了一些工业产品中微量元素分析前处理方法,并提出经验性的建议,以供一线检测人员参考与借鉴。

关键词：工业产品元素分析消解方法

Highly sensitive gas sensing material for polar gas molecule based on Janus group-Ⅲ chalcogenide monolayers: A first-principles investigation

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Science China(Technological Sciences) 2020年第8期63卷 1566-1576页

作者： PANG KaiJuan WEI YaDong LI WeiQi ZHOU Xin JIANG YingJie YANG JianQun LI XingJi gao lang JIANG YongYuan School of Physics Harbin Institute of TechnologyHarbin 150001China School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001China School of Materials Science and Engineering Harbin University of Science and TechnologyHarbin 150080China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001China

Gas sensors play an indispensable role in industrial,personal safety and environmental protection,and have been widely investigated by *** some cases,the sensitivity of a two-dimensional material sensor can be enhanced by generating vacancies or applying an external electric *** results can be achieved using Janus 2D materials,which have an inherent electric field and are good candidates for high-sensitivity gas *** this study,the electronic and transport properties of Janus group-Ⅲchalcogenide monolayers(Ga2SSe,In2SSe)were investigated for detecting CO2 and NO2 using first-principles *** several parameters that affect the performance of gas sensors,such as adsorption distances,adsorption energies,charge transfers and density of states(DOS),a detailed comparison of Janus group-Ⅲchalcogenide monolayers has been provided with their pristine systems,Janus group-Ⅲchalcogenide monolayers(Ga2SSe,In2SSe)have high *** was mainly ascribed to the built-in electric field caused by the out-of-plane asymmetric structure of Janus monolayer which enhances the dipole-dipole interaction between the polar gas molecule and the 2D *** the variation of transmission spectra of the Janus group-Ⅲchalcogenide monolayer before and after adsorbing molecules further proves the feasibility of this kind of material as a high-sensitivity gas sensor.

关键词： group-III chalcogenide monolayers gas sensors transmission spectrum electronic structure first-principles calculations

Prophylactic effect of glyceryl trinitrate on post-endoscopic retrograde cholangiopancreatography pancreatitis:A randomized placebo-controlled trial

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World Journal of Gastroenterology 2009年第3期15卷 366-368页

作者： Jian-Yu Hao Dong-Fang Wu Yue-Zeng Wang Ying-Xin gao Hai-Po lang Wei-Zhen Zhou Department of Digestion Beijing Chaoyang Hospital Affiliated to Capital Medical University Beijing 100020 China

AIM:To examine the prophylactic effect of glyceryl trinitrate on post-endoscopic retrograde cholangiopancreatography(ERCP) pancreatitis and ***:Patients scheduled for ERCP were randomly divided into study group and placebo *** in study group and placebo group were treated with 5 mg glyceryl trinitrate and 100 mg vitamin C,respectively,5 min before endoscopic ***:A total of 74 patients were enrolled in the final ***-ERCP pancreatitis occurred in 3 patients(7.9%) of the study group and 9 patients(25%) in the placebo group(P = 0.012).Hyperamylasemia occurred in 8 patients of the study group(21.1%) and 13 patients(36.1%) of the placebo group(P = 0.037).CONCLUSION:Glyceryl trinitrate before ERCP can effectively prevent post-ERCP and hyperamylasemia.

关键词： Glyceryl trinitrate Cholangiopancreatography Endoscopic retrograde Pancreatitis

Cobalt-doped TiO_(2)@C hierarchical nanocomposites derived from Ti_(3)C_(2) MXene as cathodes for hybrid magnesium-lithium batteries

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Nano Research 2024年第1期17卷 253-261页

作者： Xiaohui Li Yakun Tang lang Liu Yue Zhang Yang gao Mao Qian Wenjie Ma State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources College of ChemistryXinjiang UniversityUrumqi 830017China

TiO_(2)has been explored in hybrid magnesium-lithium batteries(HMLBs)due to the advantages of low self-discharge and small volume expansion during ion ***,how to improve the inherently low ionic and electrical conductivity of TiO_(2)is the problem that needs to be *** this work,a smart strategy is adopted to prepare cobalt-doped TiO_(2)@C(Co^(4+)-TiO_(2)@C)hierarchical nanocomposite derived from Co(II)(OH)n@*** with TiO_(2)@C(without cobalt doping),Co^(4+)-TiO_(2)@C shows the highest specific capacity(154.7 mAh·g^(-1)at 0.1 A·g^(-1)after 200 cycles)and extraordinary rate performance in *** excellent electrochemical performance of Co4+-TiO_(2)@C is ascribed to the synergistic effect of the hierarchical structure and *** experimental results and density functional theory(DFT)calculation reveal that the cobalt-doping has effectively improved the electronic conductivity and reduced the Li+migration *** work provides a new insight to design TiO_(2)-based cathode materials with high-performance in HMLBs.

关键词： Ti_(3)C_(2)MXene TiO_(2) hybrid magnesium-lithium batteries hierarchical structure cobalt-doping