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Direct synthesis of a disinfectant with fresh scent of green plants by semi-hydrogenation of alkynol on Pd single-atom catalysts

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Nano Research 2024年第5期17卷 3872-3878页

作者： Yan Jiang Xuetong Yu Yuxia Ji Xunzhu Jiang Yalin Guo Tianbo Li Liang Gao rui lang Yanxiong Fang Botao Qiao Jinxiang Dong School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory(Rongjiang Laboratory) Jieyang 515200China CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116024China Guangdong Provincial Key Laboratory of Plant Resources Biorefinery Guangzhou 510006China School of Chemical Engineering and Technology China University of Mining and TechnologyXuzhou 221116China

Alcohol-based disinfectants have protected people in the coronavirus disease 2019(COVID-19)pandemic,but olfactory stimuli of ethanol may evoke unpleasant memories associated with stressful situations in the devastating infectious *** smell of ethanol in household cleaning and disinfectant products can be covered up by the fragrance additives,and 3-hexenol is especially appreciated for the characteristic,strong odor of green *** production of 3-hexenol relies on the selective hydrogenation of 3-hexyn-1-ol,where Lindlar catalyst is normally used for the superior *** achieving such catalytic transformation in ethanol solution seems as a direct way to produce a disinfectant with green aroma,a popular consumer product in the post-COVID era,severe leaching of toxic Pb hinders Lindlar catalyst as a promising *** find that the Fe_(2)O_(3) supported Pd single-atom catalyst is highly selective to fulfill semi-hydrogenation of 3-hexyn-1-ol in 75%ethanol,and the aforementioned household product is readily generated after filtrating the stable,solid catalyst out of reaction ***-atom catalysts have been frequently utilized for fine-chemical synthesis,while in this work they make stunning debut in practical manufacture of daily used products.

关键词： single-atom catalysis hydrogenation fragrance household product coronavirus disease 2019(COVID-19)

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基于STM32单片机的太阳能自动跟踪锂电池充电系统设计

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现代信息科技 2024年第9期8卷 34-38,42页

作者：秦蒙范锐赵娟郎芮王艺龙重庆电力高等专科学校信息工程学院重庆400053

随着经济全球化和世界经济的迅猛发展,人们对煤炭、石油等传统能源的需求越来越高,但该类资源不仅储藏有限,而且容易污染环境。与此同时,以太阳能为代表的新能源逐渐进入人们的视野。在此背景下,为进一步提高太阳能的利用率,文章提出一... 详细信息

随着经济全球化和世界经济的迅猛发展,人们对煤炭、石油等传统能源的需求越来越高,但该类资源不仅储藏有限,而且容易污染环境。与此同时,以太阳能为代表的新能源逐渐进入人们的视野。在此背景下,为进一步提高太阳能的利用率,文章提出一种基于STM32单片机的太阳能自动跟踪锂电池充电系统的设计方案,利用光照传感器采集四个方向的光照强度将其转换为电信号,通过AD转换将电信号转化为数字信号,再由STM32单片机进行数据处理分析,并根据四个方向的光照强度驱动电机旋转,使太阳能电池板与太阳光尽量保持垂直,最大限度提高太阳能的吸收效率。

关键词： STM32单片机自动跟踪锂电池充电

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喀斯特地区水生光合生物群落结构组成及其对微量元素的影响

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地质科技通报 2024年第1期43卷 315-325页

作者：郎蕤赵敏李栋鲍乾蔡冠霞陈波杨海全中国科学院地球化学研究所环境地球化学国家重点实验室贵阳550081 中国科学院中国生态系统研究网络普定喀斯特生态系统研究站贵州普定562100 中国科学院大学北京100049 四川师范大学西南土地资源评价与监测教育部重点实验室成都610066 贵州财经大学贵阳550025

微量元素是影响喀斯特地表水体水质的重要因素,水生光合生物在光合代谢过程中能够吸收并去除部分有害元素,然而关于不同水生光合生物群落结构组成对微量元素的吸收效果和去除潜力如何目前则少有研究。基于普定喀斯特生态系统国家野外观... 详细信息

微量元素是影响喀斯特地表水体水质的重要因素,水生光合生物在光合代谢过程中能够吸收并去除部分有害元素,然而关于不同水生光合生物群落结构组成对微量元素的吸收效果和去除潜力如何目前则少有研究。基于普定喀斯特生态系统国家野外观测站的野外监测、系统采样和实验测定以及统计分析,构建了由裸岩地、裸土地、耕地、草地和灌丛地5种土地利用组成的植被-土壤-地下水-地表水模拟生态系统,并以其中的地表水生生态系统为研究对象,开展了水生光合生物群落结构组成对微量元素去除潜力及控制机制的研究。结果表明:①地表水水化学和水生光合生物量受季节变化与土地利用类型影响显著;②Cr,Mn,Co,Ni,Fe和Zn 6种微量元素浓度在不同喀斯特水生光合生物系统中存在显著差异,浮游-沉水共存系统对Mn,Co,Ni,Fe和Zn的吸收和去除能力优于单一浮游系统;③喀斯特地区的自然植被恢复(灌丛地和草地)促使地表水体形成的高溶解性无机碳(DIC)环境,有利于沉水植物生长,从而提高了对地表水体中Mn,Co,Ni,Fe和Zn等微量元素的去除潜力。这些认识将有助于岩溶区地表水体水生光合生物群落结构对地表水体微量元素调控机制的研究。

关键词：微量元素土地利用水生光合生物响应机制喀斯特地区

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Endopeptidase Isoenzyme Characteristics in Cucumis sativus Leaves During Dark-induced Senescence

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Journal of Integrative Plant Biology 2007年第4期49卷 507-514页

作者： Peng Zhang Fei Wang Lie-Feng Zhang Qi rui lang-Lai Xu College of Life Sciences Nanjing Agricultural University Nanjing 210095 China

The changes and characteristics of endopeptidase （EP） isoenzymes in cucumber （Cucumis sativus L.） leaves during dark-induced senescence were investigated by activity staining after gradient-polyacrylamide gel electrophoresis （G-PAGE） containing co-polymerized gelatin as substrate. The results showed that both the chlorophyll and the protein contents of leaves were decreased, and the protein degradation was correlated with the increase of proteolytic activity during the course of leaf senescence. Meanwhile, nine cucumber endopeptidases isoenzymes （CEP） with 140, 120, 106, 94, 76, 55, 46, 39 and 35 kDa molecular weights were detected. Four of these, CEP2, 3, 4 and CEP9 appeared all the time, but the changes of the activity were different during incubation. Another four CEPs （CEP5, 6, 7 and CEP8） whose activities increased with dark-induced time were only detected in senescent leaves. Furthermore, the biochemical properties of these nine CEP were also characterized. All the CEPs had high activities from 35 ℃ to 45 ℃, and the optimum temperature was found to be 40 ℃. However, the activities of CEPs were not detected below 25 ℃ or over 60 ℃. The activity bands appeared at a wide range of pH from 5.0 to 9.0, but the optimum pH was found at 7.0. No CEPs were detected at pH 4 or pH 10. By inhibition analysis we concluded that CEP2, 3, 4 and CEP9 were serine endopeptidases and CEP6 was a kind of cysteine protease. It is suggested that serine endopeptidases might play a major role in cucumber leaf senescence, and for the first time, six senescencerelated endopeptidases （CEP1, 5, 6, 7, 8 and 9） were found in cucumber leaves.

关键词： Cucumis sativus cucumber endopeptidase leaf senescence.

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健脾祛湿和络方治疗特发性膜性肾病内涵探讨

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山东中医杂志 2024年第5期43卷 466-470页

作者：郎睿王新慧闫蕾杨嘉仪余仁欢中国中医科学院西苑医院肾病科北京100091

从多维论治角度结合部分健脾祛湿和络方的研究进展,阐释健脾祛湿和络方有效治疗特发性膜性肾病(IMN)的中医学内涵。IMN以脾虚证、肾虚证为核心证候,健脾祛湿和络方立方以调理脾胃为基础,脾肾同治。从肺肾相关、肠肾相关、肺与大肠相表... 详细信息

从多维论治角度结合部分健脾祛湿和络方的研究进展,阐释健脾祛湿和络方有效治疗特发性膜性肾病(IMN)的中医学内涵。IMN以脾虚证、肾虚证为核心证候,健脾祛湿和络方立方以调理脾胃为基础,脾肾同治。从肺肾相关、肠肾相关、肺与大肠相表里等理论看,健脾祛湿和络方亦体现出了脾肺同治、肠肾同治、肠肺同治的中医学内涵,脾、肺、肠、肾相结合的多维论治是健脾祛湿和络方取效之根本。

关键词：特发性膜性肾病健脾祛湿和络方调理脾胃脾肾同治脾肺同治肠肾同治肠肺同治

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Unveiling inverse vulcanized polymers as metal-free,visible-light-driven photocatalysts for cross-coupling reactions

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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

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土石混合填料工程力学性能试验研究

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中国港湾建设 2024年第9期44卷 55-60页

作者：苏利华谭璐璐冯守中孙立强李琪蕾郎瑞卿安徽省交通运输综合执法监督局安徽合肥230051 安徽滁宁高速公路股份有限公司安徽滁州239200 滁州学院土木与建筑工程学院安徽滁州239001 天津大学建筑工程学院天津300072 天津城建大学土木工程学院天津300384

土石混合填料力学性能是影响路堤设计和施工的重要参数,相关研究一直是热点问题。为分析不同含水率、土石混合比例、击实功、土料厚度条件下土石混合体工程力学性能,开展了不同组合下土石混合体击实试验和大型直剪试验,揭示了上述因素... 详细信息

土石混合填料力学性能是影响路堤设计和施工的重要参数,相关研究一直是热点问题。为分析不同含水率、土石混合比例、击实功、土料厚度条件下土石混合体工程力学性能,开展了不同组合下土石混合体击实试验和大型直剪试验,揭示了上述因素对混合料最优含水率和力学指标的影响,并建立了土石混合填料力学指标计算方法。研究表明:总击实功、含水率和含石量对试样干密度影响较大,且随着含石量的增大,土石混合料最大干密度逐渐增大但最优含水率逐渐降低;干密度随着每层击实次数的增加而增加;随着法向应力的增大,土石混合料应力-应变曲线由应变硬化型逐渐变为应变软化型;随着含石量的增大,其内摩擦角随之减小但黏聚力随之增大,但增大幅度较小。成果可为土石混合填料路堤施工和设计提供理论参考。

关键词：土石混填料力学性能击实功土石比最优含水率

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Displacement characteristics of CO_(2)flooding in extra-high water-cut reservoirs

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Energy Geoscience 2024年第1期5卷 212-218页

作者： rui Wang Yaxiong Zhang Chengyuan Lyu Zengmin Lun Maolei Cui Dongjiang lang SINOPEC Petroleum Exploration and Production Research Institute BeijingChina

Carbon dioxide(CO_(2))flooding is a widely applied recovery method during the tertiary recovery of oil and gas.A high water saturation condition in reservoirs could induce a‘water shielding’phenomenon after the injection of CO_(2).This would prevent contact between the injected gas and the residual oil,restricting the development of the miscible zone.A micro-visual experiment of dead-end models,used to observe the effect of a film of water on the miscibility process,indicates that CO_(2)can penetrate the water film and come into contact with the residual oil,although the mixing is significantly ***,the dissolution loss of CO_(2)at high water-cut conditions is not *** oil-water partition coefficient,defined as the ratio of CO_(2)solubility in an oil-brine/two-phase system,keeps constant for specific reservoir conditions and changes little with an injection *** NMR device shows that when CO_(2)flooding follows water flooding,the residual oil decreasesdnot only in medium and large pores but also in small and micro *** levels of higher water saturation,CO_(2)displacement is characterized initially by a low oil production rate and high *** the CO_(2)breakthrough,the water-cut decreases sharply and the oil production rate increases *** response time of CO_(2)flooding at high watercut reservoirs is typically delayed and *** results were confirmed in a pilot test for CO_(2)flooding at the P1-1 well group of the Pucheng *** from this pilot study also suggest that a larger injection gas pore volume available for CO_(2)injection is required to offset the dissolution loss in high water saturation conditions.

关键词： Displacement characteristics CO_(2)flooding Water shield phenomenon Oil-water partition coefficient Response time High water-cut

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Highlights of the major progress in single-atom catalysis in 2015 and 2016

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Chinese Journal of Catalysis 2017年第9期38卷 1498-1507页

作者： Bing Han rui lang Botao Qiao Aiqin Wang Tao Zhang State Key Laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 Liaoning China University of Chinese Academy of Sciences Beijing 100049 China

The idea that single metal atoms dispersed on a solid support can act as an efficient heterogeneous catalyst was raised in2011when single Pt atoms on an FeOx surface were reported to be active for CO oxidation and preferential oxidation of CO in *** last six years have witnessed tremendous progress in the field of single‐atom *** we introduce the major achievements on this topic *** particular aspects of single‐atom catalysis are discussed in depth,including new approaches in single‐atom catalyst(SAC)synthesis,stable gold SACs for various reactions,the high selectivity of Pt and Pd SACs in hydrogenation,and the superior performance of non‐noble metal SACs in *** accomplishments will encourage more efforts by researchers to achieve the controllable fabrication of SACs and explore their potential applications.

关键词： Single‐atom catalysis Catalyst synthesis CO oxidation Hydrogenation Electrocatalysis

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Single-atom catalysis: Bridging the homo-and heterogeneous catalysis

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Chinese Journal of Catalysis 2018年第5期39卷 893-898页

作者： Fang Chen Xunzhu Jiang Leilei Zhang rui lang Botao Qiao State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina School of Chemistry Dalian University of TechnologyDalian 116024LiaoningChina

Single-atom catalysis,the catalysis by single-atom catalysts(SACs),has attracted considerable attention in recent years as a new frontier in the heterogeneous catalysis *** have the advantages of both homogeneous catalysts(isolated active sites)and heterogeneous catalysts(stable and easy to separate),and are thus predicted to be able to bridge the homo-and heterogeneous *** prediction was first experimentally demonstrated in *** this mini-review,we summarize the few homogeneous catalysis progresses reported recently where SACs have exhibited promising application:a)Rh/ZnO and Rh/CoO SAC have been used successfully in hydroformylation of olefin of which the activity are comparable to the homogeneous Wilkinson’s catalyst;b)a Pt/Al2O3 SAC has shown excellent performance in hydrosilylation reaction;and c)M-N-C SACs(M=Fe,Co etc.)have been applied in the activation of C–H *** of these examples suggest that fabrication of suitable SACs could provide a new avenue for the heterogenization of homogeneous *** pioneering works shed new light on the recognition of single-atom catalysis in bridging the homo-and heterogeneous catalysis.

关键词： Single-atom catalysis Heterogenization of homogeneous catalysts Hydroformation Hydrosilylation Activation of C–H bonds

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