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Dimensional engineering of covalent organic frameworks derived carbons for electrocatalytic carbon dioxide reduction

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SusMat 2023年第6期3卷 834-842页

作者： guojuan liu xuewen li Minghao liu Xiubei Yang Zhuangyan guo Xinqing Chen qing xu Gaofeng Zeng yue He CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research Institute(SARI)Chinese Academy of Sciences(CAS)ShanghaiChina School of Chemical Engineering University of Chinese Academy of SciencesBeijingChina Shanghai Ninth People’s Hospital Shanghai Jiao Tong UniversityShanghaiChina

Covalent organic frameworks(COFs)have been developed as the precursors to construct porous carbons for electrocatalytic ***,the influences of carbon dimensions on the catalytic performance are still *** this work,we have first constructed COF-derived carbons by template-synthesis strategy in different dimensions to catalyze the carbon dioxide reduction(CO_(2)RR).By using different templates,the one-dimensional(1D),two-dimensional(2D),and three-dimensional(3D)COF-derived carbons have been employed to anchor Co-porphyrin to form the Co-N5 sites to catalyze CO_(2)*** 1D catalyst templated by carbon nano tubes presents high binding ability of CO_(2),more defective sites,and higher electronic conductivity,resulting in a higher catalytic activity for CO_(2)and selectivity of CO than 2D and 3D carbon-based *** 1D catalyst delivers the turnover frequency values of 1150 h^(−1)and the FECO of 94.5%at 0.7 V versus RHE,which is significantly better than those of 2D and 3D carbon-based catalysts.

关键词： CO_(2)reduction Co-N_(5)sites covalent organic frameworks dimensional engineering templatesynthesis strategy

土壤可溶性有机硫的微生物分解与植物利用机制

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植物营养与肥料学报 2024年第3期30卷 587-604页

作者：姚瑞琪钭从越王英凡刘秀吴良欢马庆旭浙江大学环境与资源学院浙江省农业资源与环境重点实验室浙江杭州310058 浙江大学环境与资源学院/教育部环境修复与生态健康重点实验室浙江杭州310058

硫(S)是植物生长必需的营养元素,但是近年来植物的潜在缺硫现象在全球范围内普遍发生。可溶性有机硫(DOS)作为土壤硫的一种重要形态,可被微生物快速分解为硫酸盐而被植物吸收,因此,明确土壤DOS含量、组成、微生物分解机制和植物利用过... 详细信息

硫(S)是植物生长必需的营养元素,但是近年来植物的潜在缺硫现象在全球范围内普遍发生。可溶性有机硫(DOS)作为土壤硫的一种重要形态,可被微生物快速分解为硫酸盐而被植物吸收,因此,明确土壤DOS含量、组成、微生物分解机制和植物利用过程有利于解决潜在缺硫问题。本文综述了土壤DOS[可溶性蛋白质、含硫氨基酸蛋氨酸(Met)和半胱氨酸(Cys)]的微生物分解过程及植物吸收利用机制。可溶性蛋白质可以在数天内分解成无机硫(SO42-),而含硫氨基酸可以在数分钟到数小时内被分解。微生物吸收含硫氨基酸后的几分钟到几小时内,可将含硫氨基酸中的碳、氮和硫分别以CO^(2)、NH^(4+)和SO_(4)^(2-)的形式释放到微生物体外,释放的无机硫会被微生物再次利用以满足其生长发育。微生物能迅速利用DOS(Met、Cys),当其被微生物同化时,其原始分子结构决定了其转化成的生物大分子,从而影响DOS与SO_(4)^(2-)之间的转化速率。Cys的硫醇基(H-S-C)易被氧化,因此微生物吸收利用Cys后SO_(4)^(2-)释放量高于Met。小麦和油菜对Met和Cys的摄取量随着其供应量的增加而增加,田间条件下小麦和油菜可吸收0.63%~2.2%的外源Cys和0.4%~2.1%的外源Met。Met和Cys在植物氮营养中的作用有限,但它们在植物硫营养中的作用非常重要,约占植物硫吸收总量的10%。土壤DOS可被微生物快速分解,产生的SO_(4)^(2-)可被植物快速吸收利用。即使存在土壤微生物的激烈竞争,植物也能够吸收完整的分子态有机硫(Met和Cys),DOS是植物生长的重要硫源,其吸收主要发生在富含有机质的土壤中。

关键词：缺硫含硫氨基酸硫分解硫的生物利用率植物硫吸收

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福建龙岩烟区烤烟施肥关键参数研究

中国土壤与肥料 2024年第7期 123-128页

作者：荆晓雯曾文龙蒋鸿月钟小丽边立丽李志宏兰其骏张云贵吴树松蒋代兵郭学清刘青丽中国农业科学院农业资源与农业区划研究所北京100081 福建省烟草公司龙岩市公司福建龙岩364000 云南农业大学烟草学院云南昆明650201

为了研究福建省龙岩市烟区不同肥料用量下烤烟的肥料效应,确定适宜的肥料施用量,在福建省龙岩市,以当地主栽品种云烟87为材料,开展了氮肥6水平、磷钾肥2水平的肥料田间试验。研究了氮、磷、钾肥料配合施用对烤烟养分吸收量、相对产量及... 详细信息

为了研究福建省龙岩市烟区不同肥料用量下烤烟的肥料效应,确定适宜的肥料施用量,在福建省龙岩市,以当地主栽品种云烟87为材料,开展了氮肥6水平、磷钾肥2水平的肥料田间试验。研究了氮、磷、钾肥料配合施用对烤烟养分吸收量、相对产量及限制产量的养分因素、经济性状及肥料利用率的影响。结果表明:在烤烟生育期内,氮、磷、钾的养分积累量表现为钾>氮>磷,养分积累主要集中在旺长期。缺素会使龙岩烟区烤烟产量和经济性状降低,缺氮、缺磷、缺钾对烤烟产量和经济性状的影响大小表现为缺氮>缺磷>缺钾。不同施氮处理中,N3处理(N:135kg/hm^(2),P_(2)O_(5):105kg/hm^(2),K_(2)O:375kg/hm^(2))的各项指标最优,分别为产量2053.17kg/hm^(2)、上等烟比例79.64%、中上等烟比例95.64%、产值61850.36元/hm^(2)、均价30.12元/kg、氮肥利用率31.27%农学利用率11.28kg/kg、偏生产力15.21kg/kg。用肥料效应方程对施氮量和烟叶产量进行拟合,方程为y=511.488+1.3614x+0.116x^(2)-0.0004x^(3)(R^(2)=0.9812)。综合烟叶产量、肥料利用率和经济效益,龙岩地区推荐施氮量为135.0~177.2kg/hm^(2)。

关键词：烤烟氮磷钾推荐施肥肥料效应方程

5-Alkylpyrrole-2-carboxaldehyde derivatives from the Chinese sponge Mycale lissochela and their PTP1B inhibitory activities

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Chinese Chemical Letters 2017年第6期28卷 1190-1193页

作者： Duo-qing xue Hai-li liu Si-Han Chen Ernesto Mollo Margherita Gavagnin Jia li xu-Wen li yue-Wei guo State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Chinese Academy of Sciences Shanghai 201203 China Institute of Biomolecular Chemistry (ICB) of the National Research Council (CNR) Via Campi Flegrei 34 80078 Pozzuoli Napoli Italy

Two new 5-alkylpyrrole-2-carboxaldehyde derivatives,mycalenitrile-15（1） and mycalenitrile-16（2）,along with five known related ones（3-7）,were isolated from the South China Sea sponge Mycale *** structures of the new compounds were elucidated on the basis of extensive spectroscopic analysis and by comparison of their NMR data with those reported in the *** bioassay,compounds 1 and 7 exhibited significant PTPIB（Protein-tyrosine phosphatase 1B,a recognized target for diabetes and obesity） inhibitory activities with IC（50） values of 8.6 and 3.1 μmoI/L,respectively.A preliminary SAR analysis of the isolated compounds with their PTP1 B inhibitory effects was described.

关键词： 5-Alkylpyrrole-2-carboxaldehyde Sponge Mycale lissochela PTP1B inhibitor Marine natural product

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龙游灵山港姜席堰河段水动力特性计算分析

水电能源科学 2024年第2期42卷 34-37,170页

作者：张树立夏继红汪颖俊王玥程越州王奇花刘则雯许珂君河海大学农业科学与工程学院江苏南京211100 龙游县林业水利局浙江龙游324400

为量化姜席堰河段水动力机制,结合步坑口水文站的水文资料与实际调查情况,运用现代水力学原理及数值模拟方法对姜席堰河段的水动力学机理进行推演,比较了上游不同来流量情况下,内外江的分流比、沿程流速、水位和流场变化,确定了姜席堰... 详细信息

为量化姜席堰河段水动力机制,结合步坑口水文站的水文资料与实际调查情况,运用现代水力学原理及数值模拟方法对姜席堰河段的水动力学机理进行推演,比较了上游不同来流量情况下,内外江的分流比、沿程流速、水位和流场变化,确定了姜席堰河段具体的分流机制以及可能产生冲刷与淤积的工程隐患点。基于模拟结果,推求了姜堰和席堰的流量系数,得出了姜堰与席堰的堰流公式,为姜席堰河段治理与防护提供了理论依据。

关键词：姜席堰分流比流量系数数值模拟水动力学

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冠心病中医核心数据集构建思路

中国中西医结合杂志 2024年第7期44卷 864-867页

作者：贾君迪鞠建庆高铸烨李金根赖润民石榴徐浩北京中医药大学研究生院北京100029 国家中医心血管病临床医学研究中心中国中医科学院西苑医院北京100091 北京中医药大学东直门医院心内科北京100700

核心数据集是临床采集的标准化数据集合,有助于数据标准统一,提高数据质量,为中医药高级别循证医学证据的形成提供支撑。笔者概述核心数据集的概念、研究现状与意义,探索冠心病中医核心数据集实施的思路方法,并提出难点与解决策略,以期... 详细信息

核心数据集是临床采集的标准化数据集合,有助于数据标准统一,提高数据质量,为中医药高级别循证医学证据的形成提供支撑。笔者概述核心数据集的概念、研究现状与意义,探索冠心病中医核心数据集实施的思路方法,并提出难点与解决策略,以期为构建具有中医特色的核心数据集、提升中医药研究质量提供基础。

关键词：核心数据集中医中西医结合冠心病

Involvement of mind the gap in the organization of the tracheal apical extracellular matrix in Drosophila and Nilaparvata lugens

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Insect Science 2020年第4期27卷 756-770页

作者： Xiang-Zhao yue Dan li jun Lv Kai liu Jie Chen Wen-qing Zhang State Key Laboratory of Biocontrol and School of life Sciences Sun Yat-sen UniversityGuangzhouChina

The tracheal apical extracellular matrix(aECM)is vital for expansion of the tracheal lumen and supports the normal structure of the lumen to guarantee air entry and circulation in *** it has been found that some cuticular proteins are involved in the organization of the aECM,unidentified factors still ***,we found that mind the gap(Mtg),a predicted chitin-binding protein,is required for the normal formation of the apical chitin matrix of airway tubes in the model holometabolous insect Drosophila *** to chitin,the Mtg protein was linearly arranged in the tracheal dorsal trunk of the tracheae in *** mtg expression in the tracheae seriously affected the viability of larvae and caused tracheal chitin spiral defects in some *** of mtg mutant showed that mtg was required for normal development of tracheae in *** taenidial folds of some mtg mutant embryos were found on either lateral view of tracheal dorsal trunk or internal view of transmission electron microscopy *** abnormal tracheae were not fully filled with gas and accompanied by a reduction in tracheal width,which are characteristic phenotypes of tracheal aECM ***,in the hemimetabolous brown planthopper(BPH)Nilapat'vata lugens,downregulation of NICPAP1-N(a homolog of mtg)also led to the formation of abnormal tracheal chitin spirals and *** results suggest that mtg and its homolog are involved in the proper organization of the tracheal aECMs in flies and BPH,and that this function may be conserved in insects.

关键词： chitin Drosophila melanogaster,extracellular matrix mind the gap Nilapm vata lugens trachea

Room-temperature coherent manipulation of single-spin qubits in silicon carbide with a high readout contrast

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National Science Review 2022年第5期9卷 89-98页

作者： Qiang li jun-Feng Wang Fei-Fei Yan Ji-Yang Zhou Han-Feng Wang He liu li-Ping guo Xiong Zhou Adam Gali Zheng-Hao liu Zu-qing Wang Kai Sun guo-Ping guo Jian-Shun Tang Hao li li-xing You Jin-Shi xu Chuan-Feng li Guang-Can guo CAS Key Laboratory of Quantum Information University of Science and Technology of China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of China Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education and School of Physics and Technology Wuhan University Department of Atomic Physics Budapest University of Technology and Economics Wigner Research Centre for Physics State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences(CAS)

Spin defects in silicon carbide(SiC) with mature wafer-scale fabrication and micro/nano-processing technologies have recently drawn considerable *** room-temperature single-spin manipulation of colour centres in SiC has been demonstrated,the typically detected contrast is less than 2%,and the photon count rate is also ***,we present the coherent manipulation of single divacancy spins in 4 H-SiC with a high readout contrast(-30%) and a high photon count rate(150 kilo counts per second)under ambient conditions,which are competitive with the nitrogen-vacancy centres in *** between a single defect spin and a nearby nuclear spin is also *** further provide a theoretical explanation for the high readout contrast by analysing the defect levels and decay *** the high readout contrast is of utmost importance in many applications of quantum technologies,this work might open a new territory for SiC-based quantum devices with many advanced properties of the host material.

关键词： silicon carbide single divacancy defects spin coherent control high readout contrast bright photon emission

Fibroblast growth factor 7 is a nociceptive modulator secreted via large dense-core vesicles

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分子细胞生物学报:英文版 2015年第5期7卷 466-475页

作者： Hui liu qing-Feng Wu Jia-Yin li xing-jun liu Kai-Cheng li Yan-qing Zhong Dan Wu Qiong Wang Yin-Jing Lu Lan Bao xu Zhang Institute of Neuroscience and State Key Laboratory of Neuroscience CAS Center for Excellence in Brain ScienceShanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai 200031China State Key Laboratory of Cell Biology Institute of Biochemistry and Cell BiologyShanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai 200031China School of life Science and Technology ShanghaiTech UniversityShanghai 201210China

Fibroblast growth factor(FGF)7,a member of FGF family,is initially found to be secreted from mesenchymal cells to repair epithelial ***,its functions in the nervous system are largely *** present study showed that FGF7 was a neuromodulator localized in the large dense-core vesicles(LDCVs)in nociceptive ***7 was mainly expressed in small-diameter neurons of the dorsal root ganglion and could be transported to the dorsal spinal ***,FGF7 was mostly stored in LDCVs that did not contain neuropeptide substance *** recordings in the spinal cord slice showed that buffer-applied FGF7 increased the amplitude of excitatory post-synaptic current evoked by stimulating the sensory afferent *** tests showed that intrathecally applied FGF7 potentiated the formalin-induced acute nociceptive ***,both acute and inflammatory nociceptive responses were significantly reduced in Fgf7-deficient *** results suggest that FGF7 exerts an excitatory modulation of nociceptive afferent transmission.

关键词： fibroblast growth factor 7 dorsal root ganglion large dense-core vesicle nociceptive modulator inflammatory pain