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基于法布里-珀罗干涉仪测量大气环境CO_(2)的方法

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物理学报 2024年第2期73卷 120-126页

作者：王松周闯李素文牟福生淮北师范大学污染物敏感材料与环境修复安徽省重点实验室淮北235000

CO_(2)是主要的温室气体之一,它的排放和累积导致温室效应加强,进而引起全球气候变化,因此获取大气环境中CO_(2)的浓度变化对研究气候变化意义重大.针对低成本、快速和在线精确测量大气环境CO_(2)的技术需求,本文构建了基于法布里-珀罗... 详细信息

CO_(2)是主要的温室气体之一,它的排放和累积导致温室效应加强,进而引起全球气候变化,因此获取大气环境中CO_(2)的浓度变化对研究气候变化意义重大.针对低成本、快速和在线精确测量大气环境CO_(2)的技术需求,本文构建了基于法布里-珀罗干涉仪的CO_(2)大气浓度在线测量系统,并研究了精确获取其浓度反演方法.采用基于微机电系统(MEMS)技术的热辐射源作为法布里-珀罗干涉仪系统光源,设计透射式光路代替常见的折射式光路.通过静电控制两镜片的间距,改变干涉谱,实现10 nm步长的中心波长的干涉峰调节,扫描获得CO_(2)实时在线吸收光谱,基于差分吸收光谱原理获取了CO_(2)气体的浓度.利用样气标定系统,并用商用光声光谱多气体分析仪校验系统,结果表明,该系统检测限达1.09×10^(-6),检测精度为±1.13×10^(-6),测量误差小于1%.在煤城淮北开展了大气环境CO_(2)实时在线检测,并与商用光声光谱分析仪开展比对观测实验,二者相关系数R=0.92.实验结果表明,研发的法布里-珀罗干涉仪系统能够满足大气环境CO_(2)浓度的快速、在线高精度测量技术需求.

关键词：二氧化碳法布里-珀罗干涉仪热辐射源光声光谱多气体分析仪

Laser-rewritable room temperature phosphorescence based on in-situ polymerized tartaric acid

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Science China Chemistry 2024年第9期67卷 3029-3038页

作者： Tuo-Yu Zhou Tai-Wen Li Hai-fu Zhang Rui-Lin Chai Qian Zhao Penglin Zhang Guang-Yue Li Qian-Wen Wang Chang Li Yu Shu Zhi Fan sheng-Hua Li College of Chemical Engineering and Materials Science College of Sciences Tianjin University of Science & Technology College of Chemical Engineering North China University of Science and Technology Tianjin Key Laboratory of Multiplexed Identification for Port Hazardous Chemicals Tianjin University of Science & Technology

Organic room temperature phosphorescence(RTP) materials have potential applications in information technology and bioimaging. However, the precise control of the afterglow in reversible manners remains challenging for organic matters. Here, we report a kind of organic RTP material fabricated by simple heating mixtures of tartaric acid(TA) and aromatic acids, which can switch their phosphorescence by laser. Those mixtures show tunable phosphorescence from indigo to orange with phosphorescence efficiency of up to 53.99% due to locking different organic luminogens by the TA-formed matrix through the noncovalent interactions. The afterglow of those materials lasts a few seconds and disappears by water fumigation, which can be repeated in response to wet/heat stimuli. With drop-casting those materials on glass slides, a laser-repatternable phosphorescence is achieved by facile laser direct writing and quenched by water cyclically. Those results open the opportunity for the design of smart stimuli-responsive phosphorescence materials from sustainable natural products.

关键词： room temperature phosphorescence tunable afterglows tartaric acid laser direct writing stimuli-response

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花青素—淀粉智能指示膜的制备及性能研究

粮油食品科技 2024年第4期32卷 129-135页

作者：袁虎陈复生河南工业大学粮油食品学院河南郑州450001 中原食品实验室河南漯河462300

以淀粉为原料,花青素为功能性物质,采用静电纺丝法制备了淀粉纳米纤维智能指示膜,并研究其结构和性能。结果表明:花青素负载量的增加会增大纤维直径和指示膜的水接触角。指示膜的晶态决定其力学性能,花青素添加到10%以上时指示膜结晶度... 详细信息

以淀粉为原料,花青素为功能性物质,采用静电纺丝法制备了淀粉纳米纤维智能指示膜,并研究其结构和性能。结果表明:花青素负载量的增加会增大纤维直径和指示膜的水接触角。指示膜的晶态决定其力学性能,花青素添加到10%以上时指示膜结晶度较高其断裂应力也随之升高,达到了12.0 MPa,但断裂伸长率减小到了5.8%。加入花青素的指示膜热稳定性有所提升。静电纺丝过程不会改变淀粉和花青素的分子结构,指示膜的指示功能主要是通过花青素中酚羟基的电离状态改变引起颜色变化实现,抗氧化功能是酚羟基提供的还原性赋予的。这些结果证明了淀粉花青素智能指示膜具有良好的指示性,可用于监测食品品质变化。

关键词：淀粉花青素静电纺丝法纳米纤维智能指示膜

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四川安岳南薰偏菩萨北宋摩崖造像调查与分析

故宫博物院院刊 2024年第6期 58-75,148页

作者：王德路傅盛清华大学美术学院艺术史论系不详

安岳南薰偏菩萨摩崖造像共有四龛,其中2号龛开凿于北宋大中祥符六年(1013),雕刻千手观音与僧伽变相,反映观音以千手护持众生、以化身救苦济难的信仰观念,这种造像组合形式前所未见,也是所知唯一北宋僧伽变相实例。3号龛开凿于北宋熙宁二... 详细信息

安岳南薰偏菩萨摩崖造像共有四龛,其中2号龛开凿于北宋大中祥符六年(1013),雕刻千手观音与僧伽变相,反映观音以千手护持众生、以化身救苦济难的信仰观念,这种造像组合形式前所未见,也是所知唯一北宋僧伽变相实例。3号龛开凿于北宋熙宁二年(1069),系施主曹氏为完成亡祖亡父心愿而造,雕刻有上下五代家族供养人像,是宋人重视孝道与家族观念的产物,此龛像是川东文氏石匠早期造像遗存。

关键词：安岳南薰偏菩萨摩崖造像僧伽变相千手观音文氏石匠

Photoinduced palladium-catalyzed 1,3-diene-selective fluoroalkylamination compounds as potential bactericidal agent against Xanthomonas oryzae ***

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Chinese Chemical Letters 2024年第1期35卷 401-405页

作者： Yu Shi Zhao-sheng Zhang Jiang Shao Chen fu Lan-Tu Xiong Zhao-Dong Li Zi-Ning Cui National Key Laboratory of Green Pesticide Integrative Microbiology Research CentreGuangdong Province Key Laboratory of Microbial Signals and Disease ControlCollege of Plant ProtectionSouth China Agricultural UniversityGuangzhou 510642China Henry Fok School of Biology and Agriculture Shaoguan UniversityShaoguan 512005China College of Materials and Energy South China Agricultural UniversityGuangzhou 510642China

A series of photoinduced palladium-catalyzed 1,3-diene-selective fluoroalkylamination derivatives was rationally synthesized based on diversity-oriented synthesis via cross coupling of 1,3-dienes,amines and fluoroalkyl *** reaction featured good function group tolerance and a broad substrate scope,which could be extended to the late-stage modification of bioactive *** activity of all the compounds against Xanthomonas oryzae ***(Xoo)was *** them,compound E14 showed significant activity against Xanthomonas oryzae ***(Xoo)with half maximal effective concentration(EC50)value of 6.61μmol/*** pot experiments,the results showed that E14 could control rice bacterial blight with protective and curative efficiencies of 37.5%and 63.2%at 200μg/mL,***,a plausible mechanism for antibacterial behavior of E14 was proposed by electron microscopy,flow cytometry,reactive oxygen species detection,and biofilm *** current work,it can promote the development of photoinduced palladium-catalyzed 1,3-diene-selective fluoroalkyl amination compounds as prospective antibacterial agent bearing an intriguing mode of action.

关键词： 1,3-Diene-selective fluoroalkylamination derivatives Xanthomonas oryzae pv.oryzae Antibacterial activity Electron microscopy Reactive oxygen Flow cytometry

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冰脊对极地冰下航道流场特性影响研究

船舶力学 2024年第7期28卷 1008-1017页

作者：孙盛石玉云李志富江苏科技大学船舶与海洋工程学院江苏镇江212001

冰脊是极地冰层下表面典型结构特征之一,掌握冰脊与冰下流场的相互作用规律,对于理解极地冰下航道适航特性及近冰面潜水器操纵运动具有重要的指导意义。为了探究冰脊对近冰面流场的影响及作用范围,本文基于极地实测数据建立五组典型分... 详细信息

冰脊是极地冰层下表面典型结构特征之一,掌握冰脊与冰下流场的相互作用规律,对于理解极地冰下航道适航特性及近冰面潜水器操纵运动具有重要的指导意义。为了探究冰脊对近冰面流场的影响及作用范围,本文基于极地实测数据建立五组典型分布间距冰脊流场,利用Fluent软件平台,通过稳态求解Reynolds应力方程模型(RSM)进行数值研究,重点分析冰脊间距对冰下流场特性的影响规律。同时,探究冰脊对冰下流场干扰的辐射深度。研究表明:连续冰脊对冰脊间尾涡具有拉伸效应;根据冰脊对冰下流场的干扰程度,辐射深度可分为强辐射区、稳定辐射区和无影响区三个区间。

关键词：冰脊冰下航道适航特性 RSM 尾涡

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名校长理论思维能力建设多维考量

教学与管理 2024年第24期 42-45页

作者：孙福胜防灾科技学院马克思主义学院河北廊坊065201

致力于培养教育家的名校长培养计划的出台有着鲜明的时代背景。名校长理论思维能力建设是马克思主义人的能力理论的内在要求,为名校长成为教育家和建设教育强国提供强有力助推。要大力提升名校长的核心性能力和拓展性能力的理论思维能力... 详细信息

致力于培养教育家的名校长培养计划的出台有着鲜明的时代背景。名校长理论思维能力建设是马克思主义人的能力理论的内在要求,为名校长成为教育家和建设教育强国提供强有力助推。要大力提升名校长的核心性能力和拓展性能力的理论思维能力,努力从理论原著学习、实践调研锻炼和信息技术应用等方面来推进名校长理论思维能力建设。

关键词：名校长理论思维教育家信息技术

Contamination assessment,source apportionment and associated health risks of PTEs in agricultural soil under five land-use patterns in Sanya,China

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China Geology 2024年第3期7卷 469-479页

作者： Jian-zhou Yang Yan-gang fu Qiu-li Gong sheng-ming Ma Jing-jing Gong Jian-weng Gao Zhen-liang Wang Yong-wen Cai Shi-xin Tang Institute of Geophysical and Geochemical Exploration Chinese Academy of Geological SciencesChina Geological SurveyLangfang 065000China Key Laboratory of Coupling Process and Effect of Natural Resources Elements Ministry of Natural ResourcesBeijing 100055China

To understand the levels of potentially toxic elements(PTEs)contamination in soils and their effects on human health from different agricultural land use in Sanya,China.128 soil samples(64 topsoil samples and corresponding subsoil samples)were collected from the five representative land-use *** coupled plasma mass spectrometry(ICP-MS),Atomic fluorescence spectrometry(AFS),and Inductively coupled plasma optical emission spectrometry(ICP-OES)were used to determine the content of PTEs(As,Cd,Hg,Cu,Cr,Ni,Pb,Zn,Co,Mo,Sb,and V).Correlation analysis and factor analysis were used to determine the source of ***-accumulation index(I_(geo)),hazard quotient(HQ),and total carcinogenic risk index(TR)were used to measure the PTEs contamination and its relative health *** showed that the average values of 12 PTEs in topsoil were higher than the Hainan soil geochemical baseline,showing different degrees of PTEs accumulation *** concentration of PTEs in the topsoil was lower than those in the subsoil except for Cd and *** I_(geo)revealed that the major accumulated element in soils was As followed by *** apportionment suggested that parent materials and agricultural practices were the dominant factors for PTEs accumulation in the *** risks of soil samples from five land-use patterns presented a trend of paddy field>dry field>woodland>orchard>garden ***,the HQ values of 12 PTEs were less than the recommended limit of HQ=1,representing that there are no non-carcinogenic risks of PTEs for children and adults in the study *** TR values are within 6.95×10^(-6)-1.38×10^(-5),which corresponds to the low *** the PTEs in the agricultural soil of the study area show little influence on the health status of the local population.

关键词： Potentially toxic trace elements(PTEs) Soils Land-use Geo-accumulation index(Igeo) Hazard quotient(HQ) Total carcinogenic risk index(TR) Source apportionment Health risk Agricutural geological survey engineering

新质生产力系统:要素特质、结构承载与功能取向

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改革 2024年第2期 15-24页

作者：黄群慧盛方富中国社会科学院经济研究所中国社会科学院大学经济学院江西省社会科学院

每次人类社会大变局都蕴含着生产力的巨大革新,世界百年未有之大变局加速演进内在要求孕育形成新质生产力。新质生产力作为生产力发展的质变跃迁,是推动实现高质量发展的动力之源。从系统论视角来看,新质生产力是由相互联系、相互作用... 详细信息

每次人类社会大变局都蕴含着生产力的巨大革新,世界百年未有之大变局加速演进内在要求孕育形成新质生产力。新质生产力作为生产力发展的质变跃迁,是推动实现高质量发展的动力之源。从系统论视角来看,新质生产力是由相互联系、相互作用的生产力要素、生产力结构、生产力功能构成的“要素—结构—功能”系统。其中,新质生产力要素由新型劳动者、新型劳动对象、新型劳动工具、新型基础设施等构成,新质生产力在结构承载上表现为由新兴产业、未来产业等主导发展形成的现代化产业体系,新质生产力功能则凸显新发展理念、追求实现高质量发展、更好满足人民美好生活需要的价值取向。加快发展新质生产力,应扩大新型要素供给、以科技创新引领现代化产业体系建设、强化新质生产力系统功能取向,通过继续深化改革塑造与新质生产力发展相适应的生产关系。

关键词：新质生产力新型生产要素现代化产业体系高质量发展

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