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CoNi-MOF-74/泡沫镍衍生的CoNi@C/NF复合物用于高效有机电合成

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化学学报 2024年第6期82卷 621-628页

作者：王南南陈玉贞青岛科技大学化工学院山东青岛266042

电催化有机合成作为一种绿色可持续的合成方法,是替代工业上传统化学品合成的最佳选择,但目前大多以半反应为主.为了实现能源投资效益最大化,两电极同时进行有机物的电转化是行之有效的解决方案.电极材料需要满足两端反应同步高效进行,... 详细信息

电催化有机合成作为一种绿色可持续的合成方法,是替代工业上传统化学品合成的最佳选择,但目前大多以半反应为主.为了实现能源投资效益最大化,两电极同时进行有机物的电转化是行之有效的解决方案.电极材料需要满足两端反应同步高效进行,并总电子转移数保持一致.因此,合成廉价、高效以及高稳定性的多功能电催化剂是十分必要的.此研究中,以泡沫镍(NF)为镍源和模板,通过一步溶剂热法,原位生长CoNi-MOF获得CoNi-MOF-74/NF材料.以CoNi-MOF-74/NF为前驱体,在20%H_(2)/Ar混合气、400℃下煅烧得到NF负载的碳包裹CoNi合金纳米颗粒(CoNi@C/NF).该杂化材料不仅在三电极体系中对苯甲醇氧化成苯甲酸和硝基苯还原制苯胺这些半反应表现出优异的催化性能,对两电极体系即阳极的电氧化苯甲醇和阴极的电还原硝基苯都能实现99%产率.利用有限的催化剂及电量生产更多的高附加值产品,从而创建可持续的有机合成体系,为设计多功能电极材料在精细化学品的绿色合成领域开辟了新的思路.

关键词：金属有机框架过渡金属电催化苯甲醇氧化硝基苯还原

Antidepressant effects of Yuanzhi (Polygalae Radix) extract on chronic unpredictable mild stress-induced depression in rats: modulation of the NLRP3 inflammasome and NF-κB pathway

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Digital Chinese Medicine 2024年第2期7卷 184-194页

作者： chen yuzhen ZHAO Yongzhi ZHANG Yiwen chen Fang Iqbal Choudhary Muhammad LIU Xinmin JIANG Ning Institute of Medicinal Plant Development Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100193China Hunan Engineering and Technology Research Center of Medicinal and Edible Homologous Functional Food Hunan University of Chinese MedicineChangshaHunan 410208China Pharmay School of Shihezi University/Key Laboratory of Xinjiang Phytomedicine Resource and Utilization Ministry of EducationShiheziXinjiang 832003China International Center for Chemical and Biological Sciences University of KarachiKarachiSandh 75270Pakistan Institute of Drug Discovery Technology Ningbo UniversityNingboZhejiang 315211China

Objective To investigate the antidepressant effects of Yuanzhi(Polygalae Radix;PR)aqueous extract on chronic unpredictable mild stress(CUMS)-induced depression rat models and the underlying *** A total of 40 male Sprague Dawley(SD)rats were randomly divided into control;model;low dose of PR(PR-L;0.5 g/kg);high dose of PR(PR-H;1 g/kg);and fluoxetine(10 mg/kg)groups;with 8 rats in each *** for the rats in control group;those in the other four groups underwent CUMS-induced depression *** and fluoxetine were administered intragastrically once daily;30 min prior to the CUMS procedure;for 14 consecu-tive days until the behavioral tests were *** CUMS modeling;the sucrose prefer-ence test(SPT);open field test(OFT);novelty-suppressed feeding test(NSFT);forced swim test(FST);and tail suspension test(TST)were employed to assess the pharmacological ef-fects of PR on the mitigation of depressive-like behaviors in rat ***;the en-zyme-linked immunosorbent assay(ELISA)was utilized to quantify the serum levels of tumor necrosis factor(TNF)-α;interleukin(IL)-6;and IL-1βin the *** blot analysis was al-so conducted to evaluate the protein expression levels of nuclear factor kappa-B(NF-κB);in-ducible nitric oxide synthase(iNOS);cyclooxygenase-2(COX-2);nucleotide-binding oligomerization domain(NOD)-like receptor family pyrin domain containing 3(NLRP3);apoptosis-associated speck-like protein containing caspase recruitment domain(ASC);and caspase-1 in the hippocampal tissues of the *** staining was per-formed to observe the morphological changes in ionized calcium-binding adapter molecule 1 positive(Iba-1+)cells in the dentate gyrus(DG)of rats with CUMS-induced ***(i)Treatment with PR-H and fluoxetine resulted in significant enhancements in both the total distance and time the rats moved during tests(P<0.01 and P<0.05;respectively).Post-administration of PR-H and fluoxetine also led to s

关键词： Depression Yuanzhi(Polygalae Radix) Chronic unpredictable mild stress(CUMS) Proinflammatory cytokine Neuroinflammatory

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基于新课标的数学课堂教学改革探析

成才之路 2024年第4期 93-96页

作者：陈玉真福建省云霄县陈岱中心小学福建云霄363308

随着社会的不断发展和进步,教育也在不断变革。新课标是适应新时代教育发展需求的重要指导文件,基于新课标的数学课堂教学改革能够更好地适应新时代教育发展的要求,推动教育现代化。文章针对数学新课标进行解读,强调新课标视域下数学教... 详细信息

随着社会的不断发展和进步,教育也在不断变革。新课标是适应新时代教育发展需求的重要指导文件,基于新课标的数学课堂教学改革能够更好地适应新时代教育发展的要求,推动教育现代化。文章针对数学新课标进行解读,强调新课标视域下数学教学改革的重要性,分析新课标视域下数学教学存在的问题,对基于新课标的数学课堂教学改革策略进行深入讨论,旨在切实推动小学数学教学改革的有序开展。

关键词：新课标小学数学课堂教学改革核心素养

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A new species and a new record of free-living marine nematode of genus Diplolaimelloides(Monhysteridae)from Futian mangrove reservation in Shenzhen,China

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Journal of Oceanology and Limnology 2023年第1期41卷 314-326页

作者： yuzhen chen Huilan ZHU Yuqing GUO Fisheries College Jimei UniversityXiamen 361021China

A new species and a new record of free-living marine nematode of genus Diplolaimelloides’(Monhysteridae)inhabiting the sediment of mangrove reservation in Shenzhen,China are described and *** contortus *** characterized by the combination of the following characters:ocelli present;four pairs of post-cloacal papillae arranged in(2+2)pattern,two midway on bursa and two near posterior extremities;spicules complicated in shape,twisted and curved at middle portion;gubernaculum wedge-shaped,with distal dorsal ridge well cuticularized,proximal dorsal ridge obscure sleeve-like,proximal end wrap the spicule;vulva located at 52.1%-53.6%of body length;male tail slender,10.0-11.4 times of anal body diameter,and female tail long filiform,13.1-13.6 times of anal body *** delyi Andras sy,1958 is first recorded from China and redescribed in detail,it differs from the original description by Andrassy in 1958 for having larger body size of male,shorter tail,and posterior situation of ***,it is much conform to the redescription to specimens from East Pakistan by Timm in 1966,except for shorter tail in female and absent pre-anal *** are deposited in the Institute of Oceanology,Chinese Academy of Sciences.

关键词： taxonomy Diplolaimelloides contortus sp.nov Diplolaimelloides delyi Andrássy,1958 mangrove nematode China

M_(x)Co_(3)O_(4)/g-C_(3)N_(4) Derived from Bimetallic MOFs/g-C_(3)N_(4) Composites for Styrene Epoxidation by Synergistic Photothermal Catalysis

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Chemical Research in Chinese Universities 2022年第6期38卷 1361-1367页

作者： REN Fengdi GAO Qiqin chen yuzhen Department of Chemistry College of Chemistry and Chemical EngineeringQingdao UniversityQingdao 266071P.R.China Dongming Country Second Junior Middle School Heze 274500P.R.China

Although metal-organic frameworks(MOFs)have been widely reported as precursors for obtaining various porous materials in recent years,the limited MOF types and monofunctional active site of MOF-based catalysts remain to be hard to ***,bimetallic MOFs,MCo-ZIFs stabilized by graphitized carbon nitride(g-C_(3)N_(4))and their pyrolytic M_(x)Co_(3)O_(4)/g-C_(3)N_(4) hybrids(M=Zn,Cu,Fe,Ni)have been designedly *** obtained M_(x)Co_(3)O_(4)/g-C_(3)N_(4) hybrids display synergistic photothermal effect from both M_(x)Co_(3)O_(4) and g-C_(3)N_(4) under visible light ***,the solution temperature can be heated from room temperature(20℃)to 66℃ after 40 min ***,the catalytic activity of M_(x)Co_(3)O_(4)/g-C_(3)N_(4) exceeds those of most reported catalysts under mild reaction *** optimal ZnxCo_(3)O_(4)/g-C_(3)N_(4) catalyst realizes 96%conversion and 75%selectivity toward styrene oxide within 20 ***,the CuxCo_(3)O_(4)/g-C_(3)N_(4) could achieve up to 89%selectivity toward styrene *** our knowledge,this is the first report about the novel photothermal effect of ZIFs-derived metal oxides.

关键词： Metal-organic framework Pyrolysis Photothermal effect Styrene epoxidation

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基于自投影注意力的城市道路点云智能识别

测绘科学 2024年第3期49卷 67-76页

作者：杨莹邹文明黄恺翔王进陈昱臻金钊浙江省测绘科学技术研究院杭州310000 浙江大学流体动力与机电系统国家重点实验室杭州310027

针对大规模城市道路点云环境中,道路典型地物识别效率不高的问题,提出了一种基于自投影注意力的三维点云模型U-RandLA,通过点云投影算法获取道路点云信息自投影图,采用二维图像卷积网络分支U-Proj提取该自投影图特征,生成注意力分布图,... 详细信息

针对大规模城市道路点云环境中,道路典型地物识别效率不高的问题,提出了一种基于自投影注意力的三维点云模型U-RandLA,通过点云投影算法获取道路点云信息自投影图,采用二维图像卷积网络分支U-Proj提取该自投影图特征,生成注意力分布图,强化模型对典型地物的识别能力,提升了现有点云识别算法的重点区域感知能力;融合点云原始信息和具有大感受野的注意力分布图的特征,扩增模型初始感受野,解决现有算法感受野狭窄问题,提升对大尺度典型地物的信息提取能力。实验结果表明,U-RandLA模型对典型地物的平均识别准确率达到97.7%,物体平均交并比达到64.4%。帮助提升了实际项目的生产效率,已成功应用于浙江省、上海市、山东省、重庆市等城市道路部件的智能提取。

关键词：车载LiDAR点云点云智能识别 RandLA网络点云投影注意力机制

Error Modeling and Sensitivity Analysis of a Parallel Robot with SCARA(Selective Compliance Assembly Robot Arm) Motions

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Chinese Journal of Mechanical Engineering 2014年第4期27卷 693-702页

作者： chen yuzhen XIE Fugui LIU Xinjun ZHOU Yanhua Department of Mechanical Engineering Tsinghua University Beijing Key Lab of Precision/Ultra-precision Manufacturing Equipments and Control Tsinghua University Institute of Aircraft Engineering Naval Aeronautical and Astronautical University

Parallel robots with SCARA（selective compliance assembly robot arm） motions are utilized widely in the field of high speed pick-and-place manipulation. Error modeling for these robots generally simplifies the parallelogram structures included by the robots as a link. As the established error model fails to reflect the error feature of the parallelogram structures, the effect of accuracy design and kinematic calibration based on the error model come to be undermined. An error modeling methodology is proposed to establish an error model of parallel robots with parallelogram structures. The error model can embody the geometric errors of all joints, including the joints of parallelogram structures. Thus it can contain more exhaustively the factors that reduce the accuracy of the robot. Based on the error model and some sensitivity indices defined in the sense of statistics, sensitivity analysis is carried out. Accordingly, some atlases are depicted to express each geometric error’s influence on the moving platform’s pose errors. From these atlases, the geometric errors that have greater impact on the accuracy of the moving platform are identified, and some sensitive areas where the pose errors of the moving platform are extremely sensitive to the geometric errors are also figured out. By taking into account the error factors which are generally neglected in all existing modeling methods, the proposed modeling method can thoroughly disclose the process of error transmission and enhance the efficacy of accuracy design and calibration.

关键词： parallel robot selective compliance assembly robot arm(SCARA) motions error modeling sensitivity analysis parallelogram structure

毛竹端粒酶逆转录酶基因(PeTERT)生物信息学鉴定及表达分析

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分子植物育种 2024年第9期22卷 2905-2915页

作者：董琦石伟佳康兰李哲卢存福陈玉珍北京林业大学生物科学与技术学院林木育种国家工程中心北京100083

端粒酶(Telomerase)主要通过合成端粒DNA使得端粒延长,以维持端粒的完整性,而端粒酶逆转录酶(telomerase reverse transcriptase,TERT)是端粒酶的核心组分。目前关于多年生草本植物毛竹PeTERT基因相关研究还未见报道。本研究对PeTERT基... 详细信息

端粒酶(Telomerase)主要通过合成端粒DNA使得端粒延长,以维持端粒的完整性,而端粒酶逆转录酶(telomerase reverse transcriptase,TERT)是端粒酶的核心组分。目前关于多年生草本植物毛竹PeTERT基因相关研究还未见报道。本研究对PeTERT基因进行了生物信息学分析,采用RT-qPCR技术检测毛竹PeTERT在不同组织及外源激素和非生物胁迫处理后的表达变化。结果表明:在毛竹基因组中鉴定到PeTERT基因序列,CDS序列全长3789 bp,PeTERT含有1262个氨基酸,等电点为9.45,相对分子质量为143.74 kD,含有TRBD和RT保守结构域,二级和三级结构具有TERT的基本特征;PeTERT启动子序列包含多个响应激素和非生物胁迫元件;PeTERT在细胞分裂能力强的毛竹愈伤组织中表达量为幼苗根、茎、叶的2.5~5倍;外源激素ABA、MeJA、GA_(3)、SA均可不同程度地影响毛竹幼苗PeTERT的表达,同时PeTERT可响应低温(4℃)、高温(42℃)、高盐(200 mmol/L)、干旱(20%PEG-6000)等多种逆境条件,表明毛竹PeTERT具有非端粒功能,研究结果为探讨该基因的生物学功能提供了重要参考。

关键词：毛竹端粒酶逆转录酶生物信息学非生物胁迫表达模式

从技法借鉴到目的回溯——摄影思维介入下的建筑渲染教学

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华中建筑 2024年第1期42卷 175-179页

作者：邓瑞钧陈宇祯韩熠厦门大学嘉庚学院

新兴的计算机辅助渲染技术和传统的光学摄影技术均为建筑创作过程中重要的设计表现手段。两者在生成逻辑上的高度相似性,吸引了诸多高校展开对两者结合的尝试,出现了摄影思维与渲染软件的共谋教学。然而片面强调两者技法层面的相互借鉴... 详细信息

新兴的计算机辅助渲染技术和传统的光学摄影技术均为建筑创作过程中重要的设计表现手段。两者在生成逻辑上的高度相似性,吸引了诸多高校展开对两者结合的尝试,出现了摄影思维与渲染软件的共谋教学。然而片面强调两者技法层面的相互借鉴,忽视强调表现的本质目的,导致了学生在设计表现观上的迷失。建筑渲染教学改革实践中,通过调整摄影思维对渲染教学的介入深度和次数,既有助于在引导学生迅速掌握构图和参数等技巧性内容的同时,还能激发学生对设计信息及思想传达等表现目的的回溯思考。实践证明,“软件技法—回溯目的—摄影预实践—渲染实践”的多轮摄影思维介入的教学理念取得了良好的教学效果,可以为今后的建筑渲染教学方法提供新的思路。

关键词：渲染摄影设计表现技法目的

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