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刺槐根系和根际土对7种乔灌草植物的化感潜力

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生态环境学报 2024年第9期33卷 1406-1415页

作者：朱玲魏天兴于欢王仙范德卉赵雨琪北京林业大学地理系/山西吉县森林生态系统国家野外科学观测研究站/北京林业大学水土保持国家林业局重点实验室北京100083

刺槐(Robiniapseudoacacia)抗干旱胁迫能力、生长速率和适应性较强,是黄土丘陵区主要造林树种之一。为探究刺槐根系和根际土对该区常见乔木、灌木和草本植物的化感潜力,以刺槐根系和根际土为实验材料,采用生物测定法,设定根系和根际土... 详细信息

刺槐(Robiniapseudoacacia)抗干旱胁迫能力、生长速率和适应性较强,是黄土丘陵区主要造林树种之一。为探究刺槐根系和根际土对该区常见乔木、灌木和草本植物的化感潜力,以刺槐根系和根际土为实验材料,采用生物测定法,设定根系和根际土浸提液质量浓度为0.5、1.0、3.0、5.0、7.0、10.0mg·mL^(-1),测定不同质量浓度浸提液对冰草(Agropyroncristatum)、侧柏(Platycladusorientalis)、刺槐、胡枝子(Lespedezabicolor)、绣线菊(Spiraea salicifolia)、油松(Pinustabuliformis)、紫花苜蓿(Medicagosativa)种子萌发和幼苗生长的影响,分析其化感作用。结果表明,刺槐根系和根际土对受体植物各指标的化感作用受到质量浓度、受体植物种类和化感物质来源,及两两之间交互作用的显著影响。1)刺槐根系和根际土浸提液促进刺槐和绣线菊的种子萌发,促进作用随浸提液质量浓度增加而加强,对绣线菊的促进作用强于刺槐;根际土对刺槐种子萌发的促进作用强于根系,对绣线菊来说则相反。刺槐根系和根际土浸提液对冰草、侧柏、胡枝子、油松、紫花苜蓿种子萌发的化感作用规律一致,呈现“低促高抑”的效应。2)刺槐根系和根际土浸提液对胡枝子、冰草、侧柏、油松、绣线菊和刺槐幼苗生长的化感作用一致,其中根系和根际土浸提液促进胡枝子幼苗生长,促进作用随浸提液质量浓度的增加先增强后减弱,且根系的促进作用强于根际土;对其他5种受体植物均表现为“低促高抑”的效应。刺槐根系和根际土浸提液对紫花苜蓿幼苗生长的化感作用不一致,根系浸提液抑制紫花苜蓿的幼苗生长,根际土浸提液对其呈现“低促高抑”的效应。该研究可为刺槐林的乔灌草复合搭配提供科学依据。

关键词：刺槐根系根际土化感潜力种子萌发幼苗生长人工林

Bioinspired anti-freezing 3D-printable conductive hydrogel microfibers for highly-sensitive and wide-range detection of ultralow and high strains

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Green Chemical Engineering 2024年第1期5卷 132-143页

作者： Yi-Min Yang Ting-Yuan Hu Haidong Fan Lu Shi Shi-Yuan Zhang Zhuang Liu Xiao-Jie Ju Rui Xie wei Wang Liang-Yin Chu School of Chemical Engineering Sichuan UniversityChengdu610065China Department of Mechanics Sichuan UniversityChengdu610065China State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengdu610065China

Soft strain sensors that can transduce stretch stimuli into electrical readouts are promising as sustainable wearable ***,most strain sensors cannot achieve highly-sensitive and wide-range detection of ultralow and high *** by bamboo structures,anti-freezing microfibers made of conductive poly(vinyl alcohol)hydrogel with poly(3,4-ethylenedioxythiphene)-poly(styrenesulfonate)are developed via continuous microfluidic *** microfibers provide unique bamboo-like structures with enhanced local stress to improve both their length change and resistance change upon stretching for efficient signal *** microfibers allow highlysensitive(detection limit:0.05%strain)and wide-range(0%-400%strain)detection of ultralow and high strains,as well as features of good stretchability(485%strain)and anti-freezing property(freezing temperature:-41.1°C),fast response(200 ms),and good *** experimental results,together with theoretical foundation analysis and finite element analysis,prove their enhanced length and resistance changes upon stretching for efficient signal *** integrating microfluidic spinning with 3D-printing technique,the textiles of the microfibers can be flexibly *** microfibers and their 3D-printed textiles enable highperformance monitoring of human motions including finger bending and throat vibrating during *** work provides an efficient and general strategy for developing advanced conductive hydrogel microfibers as highperformance wearable strain sensors.

关键词： Conductive hydrogel microfibers Microfluidics Sensitive detection Wide detection range Anti-freezing

Transcriptomic insights into growth promotion effect of Trichoderma afroharzianum TM2-4 microbial agent on tomato plants

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Journal of Integrative Agriculture 2021年第5期20卷 1266-1276页

作者： ZHAO Juan LIU Ting LIU wei-cheng ZHANG Dian-peng DONG Dan WU hui-ling ZHANG Tao-tao LIU De-wen Institute of Plant and Environment Protection Beijing Academy of Agriculture and Forestry SciencesBeijing 100097P.R.China

Plant growth promoting fungi are receiving increased attention as valuable beneficial microorganisms in crop cultivation due to their capacity to produce bioactive substances,promote plant growth and enhance immune defense *** this study,a novel Trichoderma isolate,designated as TM2-4,was screened from healthy tomato rhizosphere soil and identified as Trichoderma *** filtrate of the isolate TM2-4 displayed obvious bioactive substance production and an evident effect in promoting tomato seed germination,with hypocotyl length,radical length and vigor index increased by 28.7,19.4 and 62.1%,respectively,after a 100-fold dilution *** assess the promotion effect and related mechanism of isolate TM2-4,the plant biological indexes and gene expression profiles of tomato plants treated with or without *** TM2-4 microbial agent were investigated by greenhouse pot experiment and RNA *** results demonstrated that *** TM2-4 significantly promoted tomato plant growth in terms of plant height,dry weight,number of leaves per plant and root activity,through efficient colonization in the rhizosphere and root system of the *** analyses identified a total of 984 differentially expressed genes in *** microbial agent inoculated tomato roots,which were mainly engaged in the biological process of phytohormone homeostasis,antioxidant activity,as well as metabolic pathways including phenylpropanoid biosynthesis and glutathione *** findings provide useful information for understanding the mechanism of isolate TM2-4 for tomato plant growth promotion,which would facilitate further development of *** TM2-4 microbial agent for use in vegetable crop production.

关键词： Trichoderma afroharzianum Solanum lycopersicum L. plant growth promotion transcriptome analyses qRTPCR

Severe acute respiratory syndrome coronavirus 2 (SARSCoV-2) membrane (M) protein inhibits type I and IIIinterferon production by targeting RIG-I/MDA-5 signaling

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Signal Transduction and Targeted Therapy 2021年第1期6卷 171-183页

作者： Yi Zheng Meng-wei Zhuang Lulu Han Jing Zhang Mei-ling Nan Peng Zhan Dongwei Kang Xinyong Liu Chengjiang Gao Pei-hui Wang Key Laboratory of Infection and Immunity of Shandong Province Department of ImmunologySchool of Basic Medical SciencesCheeloo College of MedicineShandong University250012 JinanChina Key Laboratory for Experimental Teratology of Ministry of Education and Advanced Medical Research Institute Cheeloo College of MedicineShandong University250012 JinanChina Department of Medicinal Chemistry Key Laboratory of Chemical Biology(Ministry of Education)School of Pharmaceutical SciencesCheeloo College of MedicineShandong University44 West Culture Road250012 JinanShandongPR China China–Belgium Collaborative Research Center for Innovative Antiviral Drugs of Shandong Province 44 West Culture Road250012 JinanShandongPR China Suzhou Research Institute Shandong UniversityShandong UniversitySuzhouJiangsu 215123China

Coronavirus disease 2019(COVID-19),caused by severe acute respiratory syndrome coronavirus 2(SARS-CoV-2),has quickly spread worldwide and has affected more than 10 million individuals.A typical feature of COVID-19 is the suppression of type I and III interferon(IFN)-mediated antiviral ***,the molecular mechanism by which SARS-CoV-2 evades antiviral immunity remains ***,we reported that the SARS-CoV-2 membrane(M)protein inhibits the production of type I and III IFNs induced by the cytosolic dsRNA-sensing pathway mediated by RIG-I/MDA-5–MAVS *** addition,the SARS-CoV-2 M protein suppresses type I and III IFN induction stimulated by SeV infection or poly(I:C)***,the SARS-CoV-2 M protein interacts with RIG-I,MAVS,and TBK1,thus preventing the formation of the multiprotein complex containing RIG-I,MAVS,TRAF3,and TBK1 and subsequently impeding the phosphorylation,nuclear translocation,and activation of ***,ectopic expression of the SARS-CoV-2 M protein facilitates the replication of vesicular stomatitis *** together,these results indicate that the SARS-CoV-2 M protein antagonizes type I and III IFN production by targeting RIG-I/MDA-5 signaling,which subsequently attenuates antiviral immunity and enhances viral *** study provides insight into the interpretation of SARS-CoV-2-induced antiviral immune suppression and illuminates the pathogenic mechanism of COVID-19.

关键词： immunity acute MAVS

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沉水植物无机氮利用策略研究进展

植物科学学报 2024年第5期42卷 673-681页

作者：魏理鲜玲潘智鹏吴胜兵刘帆余俊爽长江水利水电开发集团(湖北)有限公司长江水利水电开发集团(湖北)有限公司/中国科学院武汉植物园近自然化水生态修复工程联合实验室中国科学院武汉植物园湖北省现代农业展示中心

沉水植物在水体生态系统中发挥着关键作用，能通过直接和间接途径缓解水体中的氮负荷，促进湖泊生态系统的良性运转。沉水植物在无机氮的利用策略上与陆生植物差异显著，为了适应水环境，沉水植物地上和地下部分能够同时获取环境中的氮... 详细信息

沉水植物在水体生态系统中发挥着关键作用，能通过直接和间接途径缓解水体中的氮负荷，促进湖泊生态系统的良性运转。沉水植物在无机氮的利用策略上与陆生植物差异显著，为了适应水环境，沉水植物地上和地下部分能够同时获取环境中的氮，并将其进行向上或向下的运输。为了减少高浓度氮的毒害，沉水植物地上和地下部分在氮利用中存在一定的权衡关系。沉水植物氮同化的主要场所是叶片，主要通过谷氨酰胺合成酶/谷氨酸合成酶（GS/GOGAT）循环和谷氨酸脱氢酶（GDH）途径进行氮的同化。目前针对沉水植物的相关研究还远不及陆生植物，仅涉及到生理响应层面，仍需深入探索沉水植物氮素利用的机理，开发合适的遗传转化体系，并利用基因编辑等技术对基因功能进行验证，对关键蛋白质的结构与功能展开深入研究。

关键词：沉水植物陆生植物无机氮硝态氮铵态氮

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Flagellate erythema in transcription intermediary factor 1 gamma dermatomyositis

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Rheumatology & Autoimmunity 2024年第3期4卷 194-195页

作者： wei Ming Chong Chuanhui Xu Lee Kong Chian School of Medicine Nanyang Technological UniversitySingaporeSingapore Department of Rheumatology Allergy and Immunology Tan Tock Seng HospitalSingaporeSingapore

A 52-year-old Chinese woman was diagnosed with transcription intermediary factor 1(TIF1)gamma dermatomyositis in November 2022,with manifestations of myositis,polyarthralgia,and low-grade *** had cutaneous manifestations of Gottron's sign,V-neck sign,shawl sign,and flagellate erythema(Figure 1A).No interstitial lung disease was detected by high-resolution computed *** malignancy screenings,encompassing pap smear and mammogram,endoscopic examination,and computed tomography scans of the thorax,abdomen,and pelvis,were *** returned negative,apart from a lobulated nodule with biopsy confirmed as sclerosing pneumocytoma at the left lower lobe(Figure 1C).The therapeutic regimen,consisting of high-dose steroids and mycophenolate mofetil,effectively ameliorated the patient's myositis and rash(Figure 1B).

关键词： dermatomyositis erythema flagellate erythema skin manifestations

ICM method for topology optimization of multimaterial continuum structure with displacement constraint

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Acta Mechanica Sinica 2019年第3期35卷 552-562页

作者： Hong-ling Ye Zong-Jie Dai wei-wei Wang Yun-Kang Sui College of Mechanical Engineering and Applied Electronics Technology Beijing University of TechnologyBeijing 100124China

A new topology optimization method is formulated for lightweight design of multimaterial structures, using the independent continuous mapping (ICM) method to minimize the weight with a prescribed nodal displacement constraint. Two types of independent topological variable are used to identify the presence of elements and select the material for each phase, to realize the interpolations of the element stiffness matrix and total weight. Furthermore, an explicit expression for the optimized formulation is derived, using approximations of the displacement and weight given by first- and second-order Taylor expansions. The optimization problem is thereby transformed into a standard quadratic programming problem that can be solved using a sequential quadratic programming approach. The feasibility and effectiveness of the proposed multimaterial topology optimization method are demonstrated by determining the best load transfer path for four numerical examples. The results reveal that the topologically optimized configuration of the multimaterial structure varies with the material properties, load conditions, and constraint. Firstly, the weight of the optimized multimaterial structure is found to be lower than that composed of a single material. Secondly, under the precondition of a displacement constraint, the weight of the topologically optimized multimaterial structure decreases as the displacement constraint value is increased. Finally, the topologically optimized multimaterial structures differ depending on the elastic modulus of the materials. Besides, the established optimization formulation is more reliable and suitable for use in practical engineering applications with structural performance parameters as constraint.

关键词： Independent continuous mapping method Multimaterial Topology optimization Continuous structure

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空蚀实验装置的超声振动系统及其变幅杆研制

机械设计与制造 2024年第10期 380-384页

作者：毛汉领郭姗姗黄治伟李思玥广西大学机械工程学院广西南宁530004

空蚀是水力机械常见的失效破坏形式,常用超声空蚀实验装置来研究空蚀过程及材料的抗空蚀性能。针对超声空化原理及超声空蚀实验装置的要求,利用变截面的波动方程和传统变幅杆的设计理论设计了圆锥复合变幅杆;通过ANSYS软件对变幅杆进行... 详细信息

空蚀是水力机械常见的失效破坏形式,常用超声空蚀实验装置来研究空蚀过程及材料的抗空蚀性能。针对超声空化原理及超声空蚀实验装置的要求,利用变截面的波动方程和传统变幅杆的设计理论设计了圆锥复合变幅杆;通过ANSYS软件对变幅杆进行模态分析和谐响应分析,并对其进行多尺寸结构优化设计,以获得最优尺寸参数;根据优化参数研制了圆锥复合变幅杆,将其与换能器和工具头联接构成装置的超声谐振系统,并进行了阻抗分析和振动性能测试,结果表明变幅杆振动效果良好、满足超声空蚀实验装置的要求。

关键词：超声空蚀圆锥复合变幅杆有限元分析超声振动系统

J-shaped association between dietary thiamine intake and the risk of cognitive decline in cognitively healthy,older Chinese individuals

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General Psychiatry 2024年第1期37卷 44-52页

作者： Chengzhang Liu Qiguo Meng Yuanxiu wei Xinyue Su Yuanyuan Zhang Panpan He Chun Zhou Mengyi Liu Ziliang Ye Xianhui Qin Department of Epidemiology and Biostatistics School of Public HealthAnhui Medical UniversityHefeiAnhuiChina institute of Biomedicine Anhui Medical UniversityHefeiAnhuiChina Division of Nephrology Nanfang HospitalSouthern Medical UniversityNational Clinical Research Center for Kidney DiseaseState Key Laboratory of Organ Failure ResearchGuangdong Provincial Institute of NephrologyGuangdong Provincial Key Laboratory of Renal Failure ResearchGuangzhou Regenerative Medicine and Health Guangdong LaboratoryGuangzhouGuangdongChina

Background The prospective association of dietary thiamine intake with the risk of cognitive decline among the general older adults remains *** To investigate the association between dietary thiamine intake and cognitive decline in cognitively healthy,older Chinese *** The study included a total of 3106 participants capable of completing repeated cognitive function *** nutrient intake information was collected through 3-day dietary recalls and using a 3-day food-weighed method to assess cooking oil and condiment *** decline was defined as the 5-year decline rate in global or composite cognitive scores based on a subset of items from the Telephone Interview for Cognitive *** The median follow-up duration was 5.9 *** was a J-shaped relationship between dietary thiamine intake and the 5-year decline rate in global and composite cognitive scores,with an inflection point of 0.68 mg/day(95%confidence interval(Cl):0.56 to 0.80)and a minimal risk at 0.60-1.00 mg/day of dietary thiamine *** the inflection point,thiamine intake was not significantly associated with cognitive *** the inflection point,each unit increase in thiamine intake(mg/day)was associated with a significant decrease of 4.24(95%Cl:2.22 to 6.27)points in the global score and 0.49(95%Cl:0.23 to 0.76)standard units in the composite score within 5 years.A stronger positive association between thiamine intake and cognitive decline was observed in those with hypertension,obesity and those who were non-smokers(all p<0.05).Conclusions This study revealed a J-shaped association between dietary thiamine intake and cognitive decline in cognitively healthy,older Chinese individuals,with an inflection point at 0.68 mg/day and a minimal risk at 0.60-1.00 mg/day of dietary thiamine intake.

关键词： intake shaped cognitive