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Oil-soluble polymer brushes-functionalized nanoMOFs for highly efficient friction and wear reduction

Friction 2024年第7期12卷 1499-1511页

作者： Jianxi LIU Yong QIAN Dongsheng LI Wei WU mengchen zhang Jie YAN Bin LI Feng ZHOU State Key Laboratory of Solidification Processing Center of Advanced Lubrication and Seal MaterialsSchool of Materials Science and EngineeringNorthwestern Polytechnical UniversityXi'an 710072China Shaanxi Engineering Research Center of Special Sealing Technology Xi'an Aerospace Propulsion InstituteXi'an 710100China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

Nanomaterials as lubricating oil additives have attracted significant attention because of their designable composition and structure,suitable mechanical property,and tunable surface ***,the poor compatibility between nanomaterials and base oil limits their further *** this work,we demonstrated oil-soluble poly(lauryl methacrylate)(PLMA)brushes-grafted metal-organic frameworks nanoparticles(nanoMOFs)as lubricating oil additives that can achieve efficient friction reduction and anti-wear *** were synthesized by free-radical polymerization,which was coordinatively grafted onto the surface of the UiO-67 ***,PLMA brushes were grown on the macroinitiator-modified UiO-67 by surface-initiated atom transfer radical polymerization,which greatly improved the lipophilic property of the UiO-67 nanoparticles and significantly enhanced the colloidal stability and long-term dispersity in both non-polar solvent and base *** adding UiO-67@PLMA nanoparticles into the 500 SN base oil,coefficient of friction and wear volume reductions of 45.3%and 75.5%were achieved due to their excellent mechanical properties and oil ***,the load-carrying capacity of 500 SN was greatly increased from 100 to 500 N by the UiO-67@PLMA additives,and their excellent tribological performance was demonstrated even at a high friction frequency of 65 Hz and high temperature of 120℃.Our work highlights oil-soluble polymer brushes-functionalized nanoMOFs for highly efficient lubricating additives.

关键词： MOFs polymer brushes surface modification tribological properties friction reduction anti-wear

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Identification of the BTA8 gene reveals the contribution of natural variation to tiller angle in rice

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Journal of Integrative Agriculture 2024年第8期23卷 2868-2871页

作者： Junrong Liu Xingyu Wang Jing Wang Junhua Ye mengchen zhang Qun Xu Yaolong Yang Xinghua Wei Baoyan Jia Yue Feng State Key Laboratory of Rice Biology and Breeding China National Rice Research InstituteHangzhou 310006China College of Agronomy Shenyang Agricultural UniversityShenyang 110866China National Nanfan Research Institute(Sanya) Chinese Academy of Agricultural SciencesSanya 572024China

Plant architecture is a collection of major agronomic traits that determines rice grain production,and it is mainly influenced by tillering,tiller angle,plant height and panicle morphology(Wang and Li 2006).Tiller angle is one of the critical components that determines rice plant architecture,which in turn influences grain yield mainly due to its large impact on plant density(Wang et al.2022).

关键词： angle panicle agronomic

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长距离高落差GIL多参量集成监测研究与应用

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红外与激光工程 2024年第2期53卷 168-175页

作者：张兆闯陈建国韦晓莹张宝刘玉鹏王喜春陈青涛张孟辰周涛溪洛渡水力发电厂云南昭通657300 江苏南瑞恒驰电气装备有限公司江苏无锡214161 航天光电科技发展(天津)有限公司天津300192

针对气体绝缘金属封闭输电线路(Gas Insulated Transmission Lines, GIL)外壳振动、温度、应变等多参量通过分布光纤传感技术完成数据采集,并针对采集数据进行研究和应用。通过振动、应变、温度监测试验和数据分析,系统可准确测得光纤... 详细信息

针对气体绝缘金属封闭输电线路(Gas Insulated Transmission Lines, GIL)外壳振动、温度、应变等多参量通过分布光纤传感技术完成数据采集,并针对采集数据进行研究和应用。通过振动、应变、温度监测试验和数据分析,系统可准确测得光纤感知的振动、应变和温度数据,数据准确可靠。经测试系统测温精度≤±0.5℃,温度空间分辨率≤±0.6 m,定位精度≤±0.3 m;系统应变测量精度≤±20με;系统振动定位精度≤±2 m,振动定位精度≤±2 m。通过对GIL外壳振动、温度、应变等多参量进行集成监测研究,在减少传感设备数量的前提下探索GIL运行规律。

关键词： GIL 多参量监测分布式光纤传感 GIL运行规律

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铁路科技成果产品化预评估机制研究

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铁道技术标准（中英文） 2024年第4期6卷 27-32页

作者：孙晓薛超张孟忱中国铁路北京局集团有限公司科技与信息化部北京100036 北京交通大学交通运输学院北京100044

为评估铁路科技项目产品化的可行性,有必要在成果产品化实施前建立铁路科技成果产品化预评估机制。以铁路科研项目为研究对象,规划铁路科技成果产品化预评估流程,建立成果产品化预评估准则,构建铁路科技成果产品化预评估指标体系,采用... 详细信息

为评估铁路科技项目产品化的可行性,有必要在成果产品化实施前建立铁路科技成果产品化预评估机制。以铁路科研项目为研究对象,规划铁路科技成果产品化预评估流程,建立成果产品化预评估准则,构建铁路科技成果产品化预评估指标体系,采用层次分析赋权的方式确定各项指标的权重。结果表明,经济效益占有最高的指标权重,其中成果转化带来的收入最被关心,而人才资源的重要性排序最低。预评价体系的建立为铁路企业评价体系更加适应科技成果转化的工作提供参考意义。

关键词：成果产品化预评估机制层次分析法

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人口老龄化背景下北京市养老产业发展研究

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北京印刷学院学报 2024年第4期32卷 60-64,69页

作者：王关义程玉张梦辰北京印刷学院北京102600

近年来,我国已呈现明显的人口老龄化特征,北京是我国较早进入人口老龄化的城市之一,人口老龄化问题较为严重,与之相适应的对养老产业的需求也日益旺盛。发展养老产业不仅是北京市缓解老龄化压力、应对人口老龄化的重要途径,而且是扩大... 详细信息

近年来,我国已呈现明显的人口老龄化特征,北京是我国较早进入人口老龄化的城市之一,人口老龄化问题较为严重,与之相适应的对养老产业的需求也日益旺盛。发展养老产业不仅是北京市缓解老龄化压力、应对人口老龄化的重要途径,而且是扩大内需、促进经济社会平稳运行的重要保障。从北京市养老机构供给情况、养老社区供给情况以及养老用品供给情况等三个方面对北京市养老产业发展情况进行分析,深入剖析北京市人口老龄化和养老产业发展中存在的问题,并提出进一步推动北京市养老产业发展的对策和建议。

关键词：人口老龄化养老产业北京市

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高蛋白大豆冀豆12及其衍生品种(系)的特点与遗传分析

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大豆科学 2024年第4期43卷 402-412页

作者：张旭娟陈强赵田湉刘书林杨春燕秦君乔亚科张孟臣河北科技师范学院农业与生物科技学院河北秦皇岛063000 河北省农林科学院粮油作物研究所/国家大豆改良中心石家庄分中心/农业部黄淮海大豆生物学与遗传育种重点实验室/河北省遗传育种重点实验室河北石家庄050035 中国科学院种子创新研究院遗传与发育生物学研究所北京100101

冀豆12是由河北省农林科学院粮油作物研究所育成的高蛋白大豆品种,其蛋白含量高、高产、高抗病。该品种于2001年被农业农村部评选为农作物优异种质,是目前中国推广面积最大的高蛋白品种。为了明确冀豆12的主要表型特征和遗传特性,本研... 详细信息

冀豆12是由河北省农林科学院粮油作物研究所育成的高蛋白大豆品种,其蛋白含量高、高产、高抗病。该品种于2001年被农业农村部评选为农作物优异种质,是目前中国推广面积最大的高蛋白品种。为了明确冀豆12的主要表型特征和遗传特性,本研究采用系谱图法结合重测序技术对冀豆12及衍生品种和创新种质进行总结分析,根据多年的生产试验提炼出了冀豆12与其衍生品种和种质的优良特性,并进行重要功能位点在后代品种或品系中的传递情况分析。作为黄淮海地区首个高蛋白品种,冀豆12被作为核心亲本广泛利用。迄今为止已培育出了23个衍生品种,分别在北京、天津、河北、江苏、安徽和湖北等地通过审定并推广应用;并创新出了15个高蛋白特异种质。表型鉴定结果表明,冀豆12的衍生品种在产量相关性状、蛋白含量等品质和花叶病毒抗性上存在较大的变异,生育期、株高的变异范围相对较小。冀豆12与其衍生品种和种质在遗传上主要分为3个亚群。通过热图追踪分析功能位点显示,冀豆12中优异功能位点传递率较高,另有抗蚜虫等不利位点在后代中得到互补改良。衍生品种中蛋白含量变异较大,有两个品种蛋白含量超过冀豆12;冀豆12背景高蛋白含量相关位点个数与衍生品种(或品系)的蛋白含量呈正相关趋势。在利用冀豆12为核心种质进行品种选育的过程中,应注重蛋白含量、花叶病毒抗性等的选择,其次是生育期和株高。同时,在选择亲本时还需要关注蚜虫抗性和耐盐基因的互补。

关键词：冀豆12 衍生品种创新种质重测序遗传关系

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Brittle culm 25, which encodes an UDP-xylose synthase, affects cell wall properties in rice

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The Crop Journal 2023年第3期11卷 733-743页

作者： Siliang Xu mengchen zhang Junhua Ye Dongxiu Hu Yuanyuan zhang Zhen Li Junrong Liu Yanfei Sun Shan Wang Xiaoping Yuan Yue Feng Qun Xu Xinghua Wei Dali Zeng Yaolong Yang China National Center for Rice Improvement/State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 310006ZhejiangChina The Key Laboratory for Quality Improvement of Agricultural Products of Zhejiang Province Zhejiang A&F UniversityHangzhou 311300ZhejiangChina

Because plant mechanical strength influences plant growth and development,the regulatory mechanisms underlying cell-wall synthesis deserve *** mutants are useful for such *** have identified a novel brittle culm 25(bc25)mutant with reduced growth and partial ***25 encodes an UDP-glucuronic acid decarboxylase involved in cellulose synthesis and belongs to the UXS family.A single-nucleotide mutation in BC25 accounts for its altered cell morphology and cellwall *** electron microscopy analysis showed that the thickness of the secondary cell wall was reduced in *** analysis revealed significant increases in content of rhamnose and arabinose but not of other monosaccharides,indicating that BC25 was involved in xylose synthesis with some level of functional *** assays suggested that BC25 functions with high activity to interconvert UDP-glucuronic acid(UDP-Glc A)and *** staining showed that BC25 was ubiquitously expressed with higher expression in culm,root and sheath,in agreement with that shown by quantitative real-time(q RT)-***-seq further suggested that BC25 is involved in sugar *** conclude that BC25 strongly influences rice cell wall formation.

关键词： Brittle culm Mechanical strength UDP-xylose Cell wall Rice

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Fabrication of patterned transparent conductive glass via laser metal transfer for efficient electrical heating and antibacteria

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Nano Research 2024年第3期17卷 1578-1584页

作者： Xiaoyan Liu Ting zhang mengchen Xu Yang Li Haiqing Wang Yuke Chen Xuzihan zhang Zenan Wang Xiaoyan Li Weijia Zhou Hong Liu Institute for Advanced Interdisciplinary Research(iAIR) School of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022China School of Physics and Technology University of JinanJinan 250024China Department of Endodontics School and Hospital of StomatologyCheeloo College of MedicineShandong University&Shandong Key Laboratory of Oral Tissue Regeneration&Shandong Engineering Laboratory for Dental Materials and Oral Tissue RegenerationJinan 250012China School of Information Science and Engineering University of JinanJinan 250022China Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China

Vapor deposition and three-dimensional(3D)printing technology are considered to be conventional methods to achieve patterned metal film preparation through the assistance of masks and high ***,there are still some challenges in fabricating metal films in template-free and normal temperature *** this work,we report a flexible and rapid laser metal transfer(LMT)technique for fabricating the various metal films(Cu,Ni,Sn,Al,Fe,and Ag)with different patterns without templates on arbitrary substrates(glass,polyimide(PI)films,and aluminum nitride(AlN)ceramic).Especially,the obtained transparent conductive glass displays high transmittance(more than 90%)and adjustable resistances(≈5Ω).According to the Joule effect,the interface resistance between Cu particles and copper oxide coating produces the high temperature approximately 280℃ at 2 V in a short time(≈60 s)and remains stable at 120℃ over 12 *** last,the multifunctional glass with Cu patterns also shows excellent bactericidal activity(≈95%).This work demonstrates that laser metal transfer is an exceeding effective means of fabricating the micro/nano structures with potential applications in functional devices.

关键词： laser metal transfer(LMT) transparent conductive glass electrical heating copper pattern antibacterial

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Comprehensive insight into the occurrence characteristics,influencing factors and risk assessments of antibiotics in the Chaohu Basin

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Frontiers of Environmental Science & Engineering 2024年第5期18卷 57-71页

作者： Shuanggang Hu Hongzhi zhang Yongjie Yang Kangping Cui Junjie Ao Xuneng Tong mengchen Shi Yi Wang Xing Chen Chenxuan Li Yihan Chen School of Resources and Environmental Engineering Hefei University of TechnologyHefei230009China Ministry of Education-Shanghai Key Laboratory of Children’s Environmental Health Xinhua HospitalShanghai Jiao Tong University School of MedicineShanghai200092China Department of Civil & Environmental Engineering National University of SingaporeSingapore117576Singapore College of Resources and Environment Anhui Agricultural UniversityHefei230036China

The pollution of antibiotics in aquatic environments has received extensive ***,research on antibiotic contamination in river-lake systems,a significant form of modern aquatic environments,still needs to be *** study focuses on the Chaohu Basin(China)investigating the occurrence characteristics,influencing factors,and risk assessments of antibiotics in the river-lake *** total antibiotic concentrations in the water phase and sediment phase were 3.14–1887.49 ng/L and 0.92–1553.75 ng/g,*** was the predominant antibiotic in the water phase,whereas tetracycline prevailed in the sediment *** differences in concentration and structural composition of antibiotics between the tributaries(river system)and Chaohu Lake were observed,indicating the involvement of various geochemical processes in the attenuation of antibiotics during transport to the receiving *** analysis suggested that the western river is the primary source of antibiotics in Chaohu *** nutrient influx in heavily polluted areas is crucial to addressing the escalating issue of antibiotic pollution in the river-lake *** widespread occurrence of clindamycin in the waters is likely due to wastewater treatment plant discharges,and high-intensity human activities continue to exacerbate antibiotic *** assessment indicated that sulfamethoxazole,tetracycline,lincomycin,and clindamycin ranked in the top four with the highest risks to the most sensitive aquatic ***,the antibiotics presented no risk to consumer *** study provides valuable insights for controlling antibiotic pollution in riverlake systems.

关键词： Antibiotics Occurrence characteristics Influencing factors Risk assessments River-lake system

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Generation of seed lipoxygenase-free soybean using CRISPR-Cas9

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The Crop Journal 2020年第3期8卷 432-439页

作者： Jie Wang Huaqin Kuang Zhihui zhang Yongqing Yang Long Yan mengchen zhang Shikui Song Yuefeng Guan College of Resources and Environment Fujian Provincial Key Laboratory of Haixia Applied Plant Systems BiologyFujian Agriculture and Forestry UniversityFuzhou 350002FujianChina FAFU-UCR Joint Center for Horticultural Plant Biology and Metabolomics Haixia Institute of Science and TechnologyFujian Agriculture and Forestry UniversityFuzhou 350002FujianChina Root Biology Center College of Resources and EnvironmentFujian Agriculture and Forestry UniversityFuzhou 350002FujianChina The Key Laboratory of Crop Genetics and Breeding of Hebei Institute of Cereal and Oil CropsHebei Academy of Agricultural and Forestry SciencesShijiazhuang 050035HebeiChina

Beany flavor induced by three lipoxygenases(LOXs, including LOX1, LOX2, and LOX3)restricts human consumption of soybean. It is desirable to generate lipoxygenase-free new mutant lines to improve the eating quality of soybean oil and protein products. In this study, a pooled clustered regularly interspaced short palindromic repeats(CRISPR)-CRISPRassociated protein 9(Cas9) strategy targeting three GmLox genes(GmLox1, GmLox2, and GmLox3) was applied and 60 T_0 positive transgenic plants were generated, carrying combinations of sg RNAs and mutations. Among them, GmLox-28 and GmLox-60 were gmlox1 gmlox2 gmlox3 triple mutants and GmLox-40 was a gmlox1 gmlox2 double *** of T_1 mutant plants derived from GmLox-28, GmLox-60, and GmLox-40 showed that mutation in the GmLox gene was inherited by the next generation. Colorimetric assay revealed that plants carrying different combinations of mutations lost the corresponding lipoxygenase activities. Transgene-free mutants were obtained by screening the T_2 generation of lipoxygenase-free mutant lines(GmLox-28 and GmLox-60). These transgeneand lipoxygenase-free mutants could be used for soybean beany flavor reduction without restriction by regulatory frameworks governing transgenic organisms.

关键词： LOX Generation of seed lipoxygenase-free soybean using CRISPR-Cas9 CRISPR

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