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Photocatalytic vinyl radical-mediated multicomponent 1,4-/1,8-carboimination across alkynes and olefins/(hetero)arenes

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Science China Chemistry 2024年第2期67卷 558-567页

作者： Shan-Shan Li Yu-Shi Jiang xue-Ling Luo Xuming ran Yuqiang Li Dong Wu Cheng-xue Pan Peng-Ju Xia School of Chemistry and Pharmaceutical Sciences Guangxi Normal UniversityGuilin541004China Shanghai Artificial Intelligence Laboratory Shanghai200433China The Institute for Advanced Studies Wuhan UniversityWuhan430064China

We developed a highly selective and efficient multicomponent transformation by utilizing alkynes and olefins/(hetero)arenes through photoinduced energy-transfer *** reaction involves the formation of three distinct chemical bonds,namely C(sp~3)–C(sp~2),C(sp~2)–C(sp~3),and C(sp~3)–N,in a single coordinated *** strategy used a vinyl radical-mediated radical relay approach under mild conditions,exhibiting a broad substrate scope(>70 examples),excellent functional-group tolerance,and remarkable regio-and *** the utilization of a combination of experimental techniques and density functional theory(DFT),we delved deeper into the mechanistic intricacies of this distinctive *** revealed that the selective radical addition to electron-deficient alkynes,rather than olefins,was governed by the inherent reactivity of alkyl *** discovery presented a highly effective approach for the synthesis of stereodefined multisubstituted alkenes.

关键词： alkyne-olefin coupling DFT studies regio-and anti-stereoselectivity multisubstituted alkenes

尿素改性Bi_(2)MoO_(6)摩擦催化氧化降解罗丹明B

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中国环境科学 2024年第10期44卷 5556-5565页

作者：邢玉鲁薛怡然陈柠史焕鑫徐浩高博张留科马丙瑞赵宝秀李金成青岛理工大学环境与市政工程学院山东青岛266525

通过水热法制备了尿素改性Bi_(2)MoO_(6)(Urea-Bi_(2)MoO_(6))催化剂,借助SEM,XRD,XPS,BET等技术表征了其微观结构.经过尿素改性的Bi_(2)MoO_(6)结晶度提高,具有优异的摩擦催化性能.在转速为700r/min,RhB浓度为5mg/L,催化剂投加量为1g/L,35mm PTFE磁子的条件下,反应300min,RhB的降解率达99.02%.Urea-Bi_(2)MoO_(6)摩擦催化氧化降解RhB符合一级反应动力学方程.Urea-Bi_(2)MoO_(6)循环利用5次以后,RhB降解率仍在91.6%以上.EPR证实Urea-Bi_(2)MoO_(6)摩擦催化过程中产生了h^(+)·,O_(2)^(-)和·OH自由基,自由基猝灭实验证实h^(+)是导致RhB降解的主要物质,Urea-Bi_(2)MoO_(6)受到摩擦刺激,产生电子(e-)-空穴(h^(+))对.h^(+)与游离的OH^(-)反应生成·OH,e^(-)与水中的O_(2)生成·O_(2)^(-),三者协同降解RhB.

关键词：罗丹明B 摩擦催化 Bi_(2)MoO_(6) 尿素改性

督灸联合六字诀呼吸操对老年支气管哮喘患者哮喘控制、肺功能及生命质量的影响

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海南医学 2024年第13期35卷 1943-1947页

作者：赵艳丽刘艳芳冉雪梅杜桂芹王欣河南省中西医结合医院肺病老年科河南郑州450000

目的探讨督灸联合六字诀呼吸操对老年支气管哮喘患者哮喘控制、肺功能及生命质量的影响。方法前瞻性选取2022年1月至2023年6月河南省中西医结合医院收治的200例老年支气管哮喘患者作为研究对象,按随机数表法分为呼吸操组和督灸联合组各... 详细信息

目的探讨督灸联合六字诀呼吸操对老年支气管哮喘患者哮喘控制、肺功能及生命质量的影响。方法前瞻性选取2022年1月至2023年6月河南省中西医结合医院收治的200例老年支气管哮喘患者作为研究对象,按随机数表法分为呼吸操组和督灸联合组各100例。两组患者均进行对症支持治疗。呼吸操组患者在常规护理的基础上进行六字诀呼吸操锻炼,督灸联合组在常规护理的基础上进行督灸联合六字诀呼吸操锻炼。干预3个月后比较两组患者的用药依从性、哮喘控制率以及干预前后的心理状态[焦虑自评量表(SAS)、抑郁自评量表(SDS)]、肺功能指标、生命质量[哮喘生命质量问卷(AQLQ)]。结果干预后,督灸联合组患者用药依从性高的占比为89.00%,明显高于呼吸操组的70.00%,哮喘总控制率为88.00%,明显高于呼吸操组的76.00%,差异均有统计学意义(P<0.05);干预后,督灸联合组患者的SAS、SDS评分分别为(42.40±4.11)分、(43.61±4.03)分,明显低于呼吸操组的(46.23±3.76)分、(45.91±3.86)分,差异均有统计学意义(P<0.05);干预后,督灸联合组患者的FEV_(1)%、FEV_(1)/FVC分别为(73.31±6.65)%、(72.86±6.43)%,明显高于呼吸操组的(69.55±6.03)%、(68.42±6.17)%,PEF变异率为(18.30±1.13)%,明显低于呼吸操组的(20.44±2.65)%,差异均有统计学意义(P<0.05);干预后,督灸联合组患者的活动受限、哮喘症状、对刺激源反应、心理情绪评分、自我健康的关系分别为(47.60±5.51)分、(36.42±4.57)分、(25.78±3.95)分、(22.24±3.34)分、(18.34±2.23)分,明显高于呼吸操组的(43.34±4.78)分、(30.34±4.63)分、(23.23±3.14)分、(17.17±2.65)分、(15.69±1.75)分,差异均有统计学意义(P<0.05)。结论督灸联合六字诀呼吸操可减轻老年支气管哮喘患者的焦虑、抑郁程度,提高用药依从性及哮喘控制率,改善肺功能,进而提升老年患者的生命质量。

关键词：老年支气管哮喘督灸六字诀呼吸操用药依从性肺功能

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The evaluation of ecosystem health in mining areas on the matter element method

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Journal of Coal Science & Engineering(China) 2011年第2期17卷 176-180页

作者： LI Xin-ju LIU xue-ran LU Yan-yan GUO Shuo-li WANG Mei College of Resource and Environment Shandong Agricultural University Tai＇an 271018 China Institute of Land Reclamation and Ecological Reconstruction China University of Mining and Technology （Beijing） Beijing100083 China

According to the characteristics of ecosystem and concept of the ecosystem in mining area, the index system of the ecosystem health in mining area was set up, and the evaluation standard was established. Aiming at the complexion in which the information lost in index ration, the matter element method was put forward to evaluate the ecosystem health in mining area. Making use of the model set up, the weight was built up by the method of index number heavy, the matter element, clas- sical field, and limit field were set up. The rating hierarchy was calculated by relating function. As a case study in the mining area of Pingyangsi Town, the results show that the ecosystem is good and sustainable from 2003 to 2006, but the healthy degree is not high, and some indexes have depravation.

关键词： ecosystem health the ecosystem in mining area matter element Pingyangsi Town

Spatial-temporal variance of reclamation soil physical and chemical character in opencast mine region

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Journal of Coal Science & Engineering(China) 2009年第4期15卷 399-403页

作者： HU Ye-cui LI Xin-ju FANG Yu-dong LIU xue-ran ZHONG Wei-jing School of Land Sciences and Technology China University of Geosciences Beijing 100083 China College of Resources and Environment Shandong Agricultural University Tai＇an 271018 China National Natural Science Foundation of China Beijing 100085 China

In order to study the effects of soil compaction, and soil physical and chemicalcharacteristics after land reclamation, selected lands that were reclaimed after 1, 2, 3, 4,and 5 a, respectively, in the Majiata Mine of the Shendong Open Pit; tested the effects ofsoil compaction; and collected soil samples from 5 different depths, which are 0-7.62,7.62-15.24, 15.24-22.86, 22.86-30.48, and 30.48-38.10 cm, respectively. The resultsshow that: Land reclamation leads to soil compaction. The lowest effect of soil compaction is in the top layer and the highest one at the depth of 20-30 cm; The bulk density of reclaimed soil is higher than that of undisturbed soil; this declines with the reclamation and nearly reaches the level of undisturbed soil after 5-year reclamation;The content of reclaimed soil nutrients is lower than that of undisturbed soil. The lowest one is inthe soil dumping site, which reaches the level of undisturbed soil after 5-year reclamation;The pH value of reclaimed soil is lower than that of undisturbed soil. The highest one isin the soil dumping site; this declines with the reclamation.

关键词： opencast reclaimed soil soil characteristics spatial-temporal variation

METTL5 promotes cell proliferation,invasion,and migration by up-regulating Toll-like receptor 8 expression in colorectal cancer

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World Journal of Gastrointestinal Oncology 2024年第5期16卷 2006-2017页

作者： Ling-Shang Kong ran Tao Yi-Fan Li Wen-Bin Wang xue Zhao Department of General Surgery The Second Affiliated Hospital of Anhui Medical UniversityHefei 230001Anhui ProvinceChina Department of Vascular Surgery The Second Affiliated Hospital of Anhui Medical UniversityHefei 230002Anhui ProvinceChina Department of General Surgery The First Affiliated Hospital of Anhui Medical UniversityHefei 230001Anhui ProvinceChina Anhui Public Health Clinical Center Hefei 230012Anhui ProvinceChina Department of Scientific Research Anhui Public Health Clinical CenterHefei 230012Anhui ProvinceChina Department of Scientific Research The First Affiliated Hospital of Anhui Medical UniversityHefei 230001Anhui ProvinceChina

BACKGROUND N6-methyladenosine(m6A)modification represents the predominant alteration found in eukaryotic messenger RNA and plays a crucial role in the progression of various ***,despite its significance,the comprehensive investigation of METTL5,a key m6A methyltransferase,in colorectal cancer(CRC)remains *** To investigate the role of METTL5 in *** We assessed METTL5 expression levels in clinical samples obtained from CRC patients as well as in CRC cell *** elucidate the downstream targets of METTL5,we performed RNA-sequencing analysis coupled with correlation analysis,leading us to identify Toll-like receptor 8(TLR8)as a potential downstream *** vitro functional assessments of METTL5 and TLR8 were conducted using CCK-8 assays,scratch assays,as well as assays measuring cell migration and *** Our findings reveal a pronounced upregulation of METTL5 expression in both CRC cells and tissues,which correlated significantly with an unfavorable *** vitro experiments unequivocally demonstrated the oncogenic role of METTL5,as evidenced by its promotion of CRC cell proliferation,invasion,and ***,we identified TLR8 as a downstream target of METTL5,and subsequent down-regulation of TLR8 led to a significant inhibition of CRC cell proliferation,invasion,and tumor *** The heightened expression of METTL5 in CRC is strongly associated with clinicopathological features and a poor prognosis,thereby underscoring its potential utility as a critical marker for facilitating early diagnosis and prognostication in CRC.

关键词： METTL5 Toll-like receptor 8 Colorectal cancer

Polysiloxane with Pendant Benzo Crown Ether via a Spacer of Undecyloxymethyl as Stationary Phase for Capillary Chromatography

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Chemical Research in Chinese Universities 1994年第2期10卷 163-166页

作者： LU xue-ran ZHANG Li-feng ZHOU Xi-chun WU Cai-ying and CHEN Yuan-yin(Department of Chemistry, Wuhan University, Wuhan, 430072)

ＰｏｌｙｓｉｌｏｘａｎｅｗｉｔｈＰｅｎｄａｎｔＢｅｎｚｏＣｒｏｗｎＥｔｈｅｒｖｉａａＳｐａｃｅｒｏｆＵｎｄｅｃｙｌｏｘｙｍｅｔｈｙｌａｓＳｔａｔｉｏｎａｒｙＰｈａｓｅｆｏｒＣａｐｉｌｌａｒｙＣｈｒｏｍａｔｏｇｒａｐｈ... 详细信息

ＰｏｌｙｓｉｌｏｘａｎｅｗｉｔｈＰｅｎｄａｎｔＢｅｎｚｏＣｒｏｗｎＥｔｈｅｒｖｉａａＳｐａｃｅｒｏｆＵｎｄｅｃｙｌｏｘｙｍｅｔｈｙｌａｓＳｔａｔｉｏｎａｒｙＰｈａｓｅｆｏｒＣａｐｉｌｌａｒｙＣｈｒｏｍａｔｏｇｒａｐｈｙＬＵＸｕｅ－ｒａｎ；ＺＨＡＮＧＬ...

关键词： Polysiloxane Undecyloxy methyl spacer Crown ether

改革开放新时期以来文学领域英雄书写研究现状与思考

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西南大学学报（社会科学版） 2021年第6期47卷 138-151页

作者：冉雪厦门大学人文学院福建厦门361005

在日渐升温的英雄文化研究中,文学是其中十分重要的研究领域,形成了以不同英雄题材、英雄类型和英雄理论为中心的研究格局。在文学各题材中,英雄史诗、古典小说、武侠小说与军旅小说最热衷于书写英雄。在形形色色的英雄类型中,悲剧英雄... 详细信息

在日渐升温的英雄文化研究中,文学是其中十分重要的研究领域,形成了以不同英雄题材、英雄类型和英雄理论为中心的研究格局。在文学各题材中,英雄史诗、古典小说、武侠小说与军旅小说最热衷于书写英雄。在形形色色的英雄类型中,悲剧英雄、反英雄与女英雄以对英雄命运的观照、对英雄书写传统的反叛和对英雄性别格局的重塑,受到当代研究者的热情关注。当前,英雄书写的理论研究尚有广阔的发展空间,而对相关概念的深入探讨则是英雄文化研究得以提升的基石,围绕英雄主义、英雄叙事、英雄形象等概念的研究工作正一步步推进。文学领域英雄书写的整体性研究与基础性研究也还存在着诸多需要完善之处。随着新时代英雄文化的发展,英雄书写的当代性问题浮出历史地表,新时代英雄文化正成为文学领域英雄书写的新的发展方向。

关键词：英雄主义英雄书写英雄题材英雄类型英雄理论

新时代英雄文化研究的学术建构——基于CSSCI期刊论文的统计分析

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重庆大学学报（社会科学版） 2022年第3期28卷 114-127页

作者：冉雪厦门大学人文学院福建厦门361005

中国英雄文化源远流长,而英雄文化研究却起步甚晚,与丰富的英雄文化资源不相匹配。自步入21世纪,英雄叙事在大众文化领域大放异彩,加之党的十八大以来以习近平同志为核心的党中央高度重视英雄文化,引发学术界对英雄文化的热切关注。基于... 详细信息

中国英雄文化源远流长,而英雄文化研究却起步甚晚,与丰富的英雄文化资源不相匹配。自步入21世纪,英雄叙事在大众文化领域大放异彩,加之党的十八大以来以习近平同志为核心的党中央高度重视英雄文化,引发学术界对英雄文化的热切关注。基于CSSCI期刊论文对有效文献的时间分布、主要议题及高被引论文三方面进行统计分析,可以得知:第一,新时代英雄文化研究成果总体保持稳定增长态势。从时间上看,2013—2017年侧重于对文艺作品中英雄文化与英雄形象的阐述,2018年以后中国共产党英雄文化、新时代英雄文化、英雄理论与制度等则成为研究的热点。第二,这一领域目前主要探讨了四个方面的议题:一是关于英雄及其概念群的本体性探索,“英雄”“英雄文化”“英雄主义”“英雄精神”“英雄形象”“英雄叙事”等概念的阐释正在逐步完善中;二是对中国共产党英雄文化的研究,包括其生成逻辑、发展历程、自身特色等整体性考察,抗战时期劳动英雄与新时代人民英雄等阶段性研究,以及主要领导人英雄观的重点研究;三是有关文学艺术作品中英雄书写的分析,抗疫英雄、超级英雄等形象体现出“英雄”在新时代背景下的新发展与新内涵,新时代英雄书写的“人民性”“个性化”“崇高性”“日常性”等特征得到重视;四是对历史与当下英雄整体或英雄个体的论述。第三,从这一领域的高被引论文来看,思想政治教育和历史文化、法学、电影与文学以及社会学等方面的英雄文化研究最为热门。总体来看,新时代英雄文化研究尚处于起步阶段,应深刻把握时代主题,汇聚研究力量,并以问题为导向,回应时代关切,自觉将研究汇入时代洪流,突出实践价值;同时在多元英雄形象的建构中彰显平凡英雄的时代取向,并从优秀传统文化资源与革命英雄文化的传承,文化产业创造等方面努力探索自身特色,构建讲述中国故事、展示中国形象的新时代英雄文化研究体系。

关键词：新时代英雄英雄文化研究 CSSCI期刊新时代英雄文化