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Manipulation of photosensory and circadian signaling restricts phenotypic plasticity in response to changing environmental conditions in Arabidopsis

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Molecular Plant 2024年第9期17卷 1458-1471页

作者： Martin William Battle Scott Fraser Ewing Cathryn Dickson Joseph Obaje Kristen N.Edgeworth rebecca Bindbeutel Rea LAntoniou-Kourounioti Dmitri A.Nusinow Matthew Alan Jones Plant Science Group School of Molecular BiosciencesUniversity of GlasgowGlasgow G128QQUK Danforth Plant Science Center St.LouisMO 63132USA Department of Biological and Biomedical Sciences Washington University in St.LouisSt.LouisMO 63130USA Present address:School of Biological and Environmental Sciences Liverpool John Moores UniversityLiverpool L22QPUK

Plants exploit phenotypic plasticity to adapt their growth and development to prevailing environmental *** of light and temperature signals is aided by the circadian system,which provides a temporal *** plasticity provides a selective and competitive advantage in nature but is obstructive during large-scale,intensive agricultural practices since economically important traits(including vegetative growth and flowering time)can vary widely depending on local environmental *** prevents accurate prediction of harvesting times and produces a variable *** this study,we sought to restrict phenotypic plasticity and circadian regulation by manipulating signaling systems that govern plants'responses to environmental *** modeling of plant growth and develop-ment predicted reduced plant responses to changing environments when circadian and light signaling pathways were *** tested this prediction by utilizing a constitutively active allele of the plant photoreceptor phytochrome B,along with disruption of the circadian systemvia mutation of *** found that these manipulations produced plants that are less responsive to light and temper-ature cues and thus fail to anticipate *** engineered plants have uniform vegetative growth and flowering time,demonstrating how phenotypic plasticity can be limited while maintaining plant *** has significant implications for future agriculture in both open fields and controlled environments.

关键词： circadian developmental plasticity phenotypic plasticity external coincidence light temperature

Association of physical activity with risk of chronic kidney disease in China:A population-based cohort study

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Journal of Sport and health Science 2024年第2期13卷 204-211页

作者： Kexiang Shi Yunqing Zhu Jun Lv Dianjianyi Sun Pei Pei huaidong Du Yiping Chen Ling Yang Bing han rebecca Stevens Junshi Chen Zhengming Chen Liming Li Canqing Yu China Kadoorie Biobank collaborative group Department of Epidemiology&Biostatistics School of Public HealthPeking University Health Science CenterBeijing 100191China Peking University Center for Public health and Epidemic Preparedness&Response Beijing 100191China Key Laboratory of Epidemiology of Major Diseases(Peking University) Ministry of EducationBeijing 100191China Clinical Trial Service Unit&Epidemiological Studies Unit(CTSU) Nuffield Department of Population HealthUniversity of OxfordOxford OX37LFUK Medical Research Council Population health Research Unit at the University of Oxford Oxford OX37LFUK NCDs Prevention and Control Department Henan Center for Disease Control and PreventionZhengzhou 450016China China National Center for Food Safety Risk Assessment Beijing 100022China 不详

Background:Information on the association between physical activity(PA)and the risk of chronic kidney disease(CKD)is *** aimed to explore the associations of total,domain-specific,and intensity-specific PA with CKD and its subtypes in ***:The study included 475,376 adults from the China Kadoorie Biobank aged 30-79 years during 2004-2008 at *** interviewer-administered questionnaire was used to collect the information about PA,which was quantified as metabolic equivalent of task hours per day(MET-h/day)and categorized into 4 groups based on *** regression was used to analyze the association between PA and CKD ***:During a median follow-up of 12.1 years,5415 incident CKD cases were documented,including 1159 incident diabetic kidney disease(DKD)cases and 362 incident hypertensive nephropathy(hTN)*** PA was inversely associated with CKD risk,with an adjusted hazard ratio(hR,95%confidence interval(95%CI))of 0.83(0.75-0.92)for incident CKD in the highest quartile of total PA as compared with participants in the lowest *** results were observed for risk of DKD and hTN,and the corresponding hRs(95%CIs)were 0.75(0.58-0.97)for DKD risk and 0.56(0.37-0.85)for hTN *** nonoccupational PA,low-intensity PA,and moderate-to-vigorous-intensity PA were significantly associated with a decreased risk of CKD,with hRs(95%CIs)of 0.80(0.73-0.88),0.85(0.77-0.94),and 0.85(0.76-0.95)in the highest quartile,***:PA,including nonoccupational PA,low-intensity PA,and moderate-to-vigorous-intensity PA,was inversely associated with the risk of CKD,including DKD,hTN,and other CKD,and such associations were dose dependent.

关键词： Chronic kidney disease Domain Intensity Physical activity

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不同连接节点的重型管道支吊架承载性能研究

建筑结构 2024年第20期 76-83页

作者：侯和涛 rebecca Fikre EDO 程天顺胡杰王道永赵靖山东大学土建与水利学院中建八局第二建设有限公司

随着装配式建筑的快速发展，装配式管道支吊架的应用范围越来越广，与传统焊接支吊架相比，装配式支吊架具有施工效率高、环境污染小等优势。目前针对装配式重型支吊架的设计规范及相关研究较为缺乏，因此针对不同连接方式的装配式重型... 详细信息

随着装配式建筑的快速发展，装配式管道支吊架的应用范围越来越广，与传统焊接支吊架相比，装配式支吊架具有施工效率高、环境污染小等优势。目前针对装配式重型支吊架的设计规范及相关研究较为缺乏，因此针对不同连接方式的装配式重型支吊架展开足尺试验研究，结合数值仿真与理论分析，探究不同连接节点支吊架的破坏形态与承载能力。研究结果表明：不同节点的支吊架破坏形式均表现为横梁弯扭破坏，且符合极值点失稳特征；使用槽钢横梁及半槽型连接件的支吊架承载力明显低于采用端板连接的h型钢横梁支吊架，外伸竖向端板连接结构的承载力优于平齐竖向端板连接，也优于水平端板连接节点；在进行理论计算时，半槽型连接节点和外伸端板连接节点可采用半刚接模型计算，平齐端板连接节点可采用铰接模型计算，4种节点形式的支吊架整体稳定系数均高于规范计算数值，能够满足整体稳定性的要求。

关键词：装配式管道支吊架节点连接钢梁半槽型连接件足尺试验承载力稳定性

Intracranial pressure is elevated at 24h post-stroke inmice

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Neuroprotection 2024年第1期2卷 60-64页

作者： Kirby E.Warren rebecca J.hood Fredrick R.Walker Neil J.Spratt School of Biomedical Sciences and Pharmacy University of NewcastleCallaghanAustralia hunter Medical Research Institute NewLambton HeightsAustralia School of Biomedicine Discipline of Anatomy and PathologyFaculty of Health and Medical SciencesThe University of AdelaideAdelaideAustralia Department of Neurology John Hunter HospitalNewLambton HeightsAustralia

Background:It has long been assumed that post-stroke intracranial pressure(ICP)elevation occurs because of large infarct and edema ***,we have repeatedly shown IcP elevation at 24 h post-stroke in the presence of little to no edema in *** processes are often conserved across species and types of ***,we aimed to determine if an ICP rise occurs at 24 h post-stroke in the presence of small infarct and edema volumes in ***:Mice were randomized by random number table to either photothrombotic stroke or sham surgery(n=15).Epidural ICP was recorded using a fiber optic catheter at 1 h post-stroke(baseline)and between 23 and ***:ICP was significantly higher at 24 h compared to baseline in stroke animals(n=6;10.71±6.45mmhg vs.3.74±2.20mmhg,respec-tively;p=0.03).ICP at 24 h was also significantly higher in stroke mice compared to sham(n=6;3.45±1.43mmhg;p=0.02).There was no change in ICP in sham mice(p=0.9).Edema volumes in stroke animals were small(0.04±0.04 mm3)and unlikely to have caused significant ICP ***:This study provides evidence of an edema-independent ICP elevation following small ischemic stroke in *** occurrence of this rise supports our findings in other species and suggests it is caused by a previously undescribed mechanism.

关键词： cerebraledema intracranial pressure ischemic stroke

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表面分析工具在磨损基础研究中的应用(上)

润滑与密封 1980年第1期 57-66页

作者： Donaed h.buckley ,杨明安武汉材料保护研究所

本文评述了研究材料磨损的原子级特性的各种技术和表面分析工具。包括化学浸蚀、X射线衍射、电子衍射、扫描电子显微镜,低能电子衍射、俄歇发射能谱分析、化学电子能谱分析、场离子显微镜和原子探针。讨论了表面能、晶体结构、晶相取向... 详细信息

本文评述了研究材料磨损的原子级特性的各种技术和表面分析工具。包括化学浸蚀、X射线衍射、电子衍射、扫描电子显微镜,低能电子衍射、俄歇发射能谱分析、化学电子能谱分析、场离子显微镜和原子探针。讨论了表面能、晶体结构、晶相取向、位错行为模式和内聚键之类对磨损表面的影响和磨损表面区的性能。用前述的工具鉴定了产生磨屑的许多机理。

关键词：扫描电子显微镜六角形表面层 ESCA 衍射图样 LEED 流体层表面分析能谱仪原子层低能电子衍射

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David Copperfield

Effects of cucumber mosaic virus-infected chilli plants on non-vector Bemisia tabaci (hemiptera Aleyrodidae)

作者： Charles Dickens edited by Jerome h. buckley.

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Insect Science 2019年第1期26卷 76-85页

作者： Khalid A.Saad M.N.Mohamad Roff rebecca h.hallett Idris B.Abd-Ghani Faculty of Science and Technology School of Environmental and Natural Resource SciencesNational University MalaysiaBangi SelangorMalaysia horticulture Research Centre HeadquartersMARDI-UPMSerdang SelangorMalaysia School of Environmental Sciences University of GuelphGuelphOntarioCanada

Plant virus infections are known to alter host plant attractiveness and suitability for insect *** study was conducted to determine how cucumber mosaic virus (CMV)-infected chilli plants affect the fitness and settling preferences ofnonvector whitefly,Bemisia tabaci adults under dual-choice conditions with volatile organic compounds analyzed using solid phase microextraction coupled with gas chromatography-mass spectrometry (GC-MS).Results showed that the presence of CIVIV in chilli plants substantially affects the settling preferences of the ***,which preferred to settle on noninfected *** of the egg stage and the longevity and fecundity of adult *** on CMV-infected chilli plants were not markedly different from those on noninfected chilli *** contrast,the developmental time from egg to adult was significantly reduced in CMV-infected chilli plants compared to the noninfected *** results also showed that CMV-infected chilli plants released significantly more linalool and phenylacetaldehyde than noninfected ***,it was suggested that the behavioral response of *** might be modified by CMV-infected plants,which alter the release of specific headspace *** on these results,the modification of plant volatile profiles may help in enhancing the effectiveness of biological control and the protection of crop plants against ***.

关键词： Bromoviridae Capsicum anmium cucumovirus in sect-pathogen interactions whitefly

Building Power： Conspicuous Consumption, Projection of Identity, and Female Power in the Late Seventh and Early Eighth Centuries

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Frontiers of Literary Studies in China-Selected Publications from Chinese Universities 2012年第4期6卷 472-489页

作者： rebecca Doran Department of East Asian Studies McGill University Montreal Quebec H3A 0E2 Canada

This article explores propaganda and self-portrayals among women rulers in seventh and eighth century Tang China, a unique era in which court politics were dominated by female leaders. I analyze the way in which these leaders themselves wished to be rhetorically constructed, the images and allusions with which they desired to be figured, and the way in which they were rhetorically reconstructed by later writers after their deaths. I focus on the theme of auspiciousness--in particular, the definition of the ＂natural＂ in relation to gender identity and power. Female imagery is deployed in late seventh- and early eighth-century works to create the image of a particular brand of far-reaching, generative power possessed and/or desired by the leaders of the time. Beyond revealing the images and allusions with which the female power-holders wished to hear themselves be described and exalted, and what occasions were deemed worthy of exalting, these works offer a fascinating counterpoint to materials which retroactively defame this image. The rhetorical strategies and images later used to delegitimize and denigrate the power of these women often represent opposite treatments of themes present in the court literature from the Zhou-Jinglong era. This paper argues that reconstructions of these women＇s identities as female power-holders indicate the prerogative of later writers to reshape their images in accordance with their own judgments, conceptualizations, and fears of female power.

关键词： Tang women Tang culture Empress Wu court literature genderroles

Rhythms of chloroplast magnesium import contribute to daily metabolic feedback

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Molecular Plant 2022年第11期15卷 1659-1661页

作者： Xiang Li Christopher R.buckley Michael J.haydon School of BioSciences University of MelbourneParkvilleVIC 3010Australia

Organisms have evolved stable yet dynamic circadian systems to coordinate biological rhythms that contribute to *** oscillators generate rhythms via transcriptional and post-transcriptional control of key cellular processes such as metabolism and nutrient transport that fluctuate across the course of the *** addition,intracellular ions and metabolites can act as signaling molecules and protein cofactors that provide feedback to fine-tune biological timekeeping(haydon et al.,2013).

关键词： magnesium metabolism coordinate