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Effect of a Carbon Fibre-steel Fibre-graphite Conductive Filler on the Electrothermal Properties of Cementitious Materials

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 141-151页

作者： FAN Yanan WEI Hong ZHENG Hongyong DU Hongxiu department of architecture and Environmental Engineering Taiyuan UniversityTaiyuan 030032China College of Civil Engineering Taiyuan University of TechnologyTaiyuan 030032China

Carbon fibre,steel fibre and graphite were used as conductive fillers to prepare cementitious materials with excellent electrothermal *** electrically conductive cementitious materials with different volume dosages were analysed through compressive and flexural strength,electrochemical impedance spectroscopy and temperature rise *** equivalent circuit model was established to study the electrically conductive heat generation mechanism in the electrically conductive cementitious *** results indicate that the mechanical properties of cementitious composite materials with a ternary conductive phase are better than those of pristine cementitious materials because the fibrous filler improves their mechanical ***,the incorporation of graphite in the material reduces its *** fibrous and point-like conductive phase materials into the cementitious material enhances the overall conductive pathway and considerably reduces the electrical resistance of the cementitious material,enhancing its conductive *** volume ratios of carbon fibre,steel fibre and graphite that achieve an optimal complex doping in the cementitious material were 0.35%,0.6%and 6%,*** was determined using the mutation point of each circuit element parameter as the percolation *** addition,at a certain safety voltage,there is a uniform change between the internal and surface temperatures of the conductive cementitious material,and the heating effect in this materialis is considerably better than that in the pristine cementitious material.

关键词： cementitious composites conductive fillers electrothermal properties electrochemical impedance spectroscopy

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Identification and Functional Analysis of Three MAX2 Orthologs in Chrysanthemum

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Journal of Integrative Plant Biology 2013年第5期55卷 434-442页

作者： Lili Dong Abdurazak Ishak Jing Yu Ruiyan Zhao Liangjun Zhao department of Ornamental horticulture and landscape architecture China Agricultural University

MORE AXILLARY BRANCHING 2 （MAX2）, initially identified in Arabidopsis thaliana, is a key regulatory gene in strigolactone signal transduction. Three orthologs of MAX2 were cloned from Dendranthema grandiflorum （DgMAX2a, b, and c）. Each of the genes has an open reading frame of 2,049 bp and encodes 682 amino acid proteins. The predicted amino acid sequences of the three DgMAX2s are most closely related to the MAX2 orthologs identified in petunia （PhMAX2A and PhMAX2B）, and display the highest amino acid sequence similarity with PhMAX2A compared to other MAX2s. Expression analysis revealed that DgMAX2s are predominantly expressed in the stem and axillary buds. On a cellular level, we localized the DgMAX2a：：GFP fusion protein to the nucleus in onion epidermal cells, which is consistent with the nuclear localization of MAX2 in Arabidopsis. The chrysanthemum DgMAX2a is able to restore the max2–1 mutant branching to wild-type （WT） Arabidopsis, suggesting that it is a functional MAX2 ortholog. These results suggest that DgMAX2s may be candidate genes for reducing the shoot branching of chrysanthemum.

关键词： Arabidopsis DgMAX2 chrysanthemum nuclear localized shoot branching.

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Optimal design of vegetation in residential district with numerical simulation and field experiment

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Journal of Central South University 2012年第3期19卷 688-695页

作者：洪波林波荣王冰李树华 department of Ornamental horticulture and landscape architecture China Agricultural University School of architecture Tsinghua University

Vegetation plays a key role in improving wind environment of residential districts,and is helpful for creating a comfortable and beautiful living *** optimal design of vegetation for wind environment improvement in winter was investigated by carrying out field experiments in Heqingyuan residential area in Beijing,and after that,numerical simulation with SPOTE(simulation platform for outdoor thermal environment) experiments for outdoor thermal environment of vegetation was adopted for *** conclusions were summarized as follows:1) By comparing the experimental data with simulation results,it could be concluded that the wind field simulated was consistent with the actual wind field,and the flow distribution impacted by vegetation could be accurately reflected;2) The wind velocity with vegetation was lower than that without vegetation,and the wind velocity was reduced by 46%;3) By adjusting arrangement and types of vegetation in the regions with excessively large wind velocity,the pedestrian-level wind velocity could be obviously improved through the simulation and comparison.

关键词： wind environment simulation platform for outdoor thermal environment (SPOTE) field experiment optimal design of vegetation simulation

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Maintenance of water uptake and reduced water loss contributeto water stress tolerance of Spiraea alba Du Roi and Spiraeatomentosa L.

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horticulture Research 2014年第1期1卷 150-156页

作者： Kelly M Stanton Michael V Mickelbart department of horticulture and landscape architecture Purdue UniversityWest LafayetteIN 47907USA

Two primarily eastern US native shrubs,Spiraea alba Du Roi and Spiraea tomentosa L.,are typically found growing in wet areas,often with standing *** species have potential for use in the landscape,but little is known of their environmental requirements,including their adaptation to water *** geographic accessions of each species were evaluated for their response to water stress under greenhouse ***-ground biomass,water relations and gas exchange were measured in well-watered and water stress *** both species,water stress resulted in reduced growth,transpiration and pre-dawn water ***,both species also exhibited the ability to osmotically adjust to lower soil water content,resulting in maintained midday leaf turgor potential in all *** CO_(2) assimilation was reduced only in one accession of ***,primarily due to large reductions in stomatal *** lost a larger proportion of leaves than *** in response to water *** primary water stress tolerance strategies of *** and *** appear to be the maintenance of water uptake and reduced water loss.

关键词： stress primarily landscape

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A novel protein complex that regulates active DNA demethylation in Arabidopsis

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Journal of Integrative Plant Biology 2021年第4期63卷 772-786页

作者： Pan Liu Wen-Feng Nie Xiansong Xiong Yuhua Wang Yuwei Jiang Pei Huang Xueqiang Lin Guochen Qin Huan Huang Qingfeng Niu Jiamu Du Zhaobo Lang Rosa Lozano-Duran Jian-Kang Zhu Shanghai Center for Plant Stress Biology Center of Excellence in Molecular Plant SciencesChinese Academy of SciencesShanghai 201602China University of Chinese Academy of Sciences Beijing 100049China department of horticulture College of Horticulture and Plant ProtectionYangzhou UniversityYangzhou 225009China department of horticulture&landscape architecture Purdue UniversityWest LafayetteIndiana 47906USA

Active DNA demethylation is critical for altering DNA methylation patterns and regulating gene *** 5-methylcytosine DNA glycosylase/lyase ROS1 initiates a base-excision repair pathway for active DNA demethylation and is required for the prevention of DNA hypermethylation at 1000 s of genomic regions in *** ROS1 is regulated and targeted to specific genomic regions is not well ***,we report the discovery of an Arabidopsis protein complex that contains ROS1,regulates ROS1 gene expression,and likely targets the ROS1 protein to specific genomic ***1 physically interacts with a WD40 domain protein(RWD40),which in turn interacts with a methyl-DNA binding protein(RMB1)as well as with a zinc finger and homeobox domain protein(RHD1).RMB1 binds to DNA that is methylated in any sequence context,and this binding is necessary for its function in ***-of-function mutations in RWD40,RMB1,or RHD1 cause DNA hypermethylation at several tested genomic regions independently of the known ROS1 regulator *** the hypermethylated genomic regions include the DNA methylation monitoring sequence in the ROS1 promoter,plants mutated in RWD40,RMB1,or RHD1 show increased ROS1 ***,ROS1 binding to the ROS1 promoter requires RWD40,RMB1,and RHD1,suggesting that this complex dictates ROS1 targeting to this *** results demonstrate that ROS1 forms a protein complex with RWD40,RMB1,and RHD1,and that this novel complex regulates active DNA demethylation at several endogenous loci in Arabidopsis.

关键词： DNA demethylation DNA methylation methyl-DNA binding ROS1 WD40 domain

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SLAF marker based QTL mapping of fruit-related traits reveals a major-effect candidate locus ff2.1 for flesh firmness in melon

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Journal of Integrative Agriculture 2023年第11期22卷 3331-3345页

作者： CHEN Ke-xin DAI Dong-yang WANG Ling YANG Li-min LI Dan-dan WANG Chao JI Peng SHENG Yun-yan department of horticulture and landscape architecture Heilongjiang Bayi Agricultural UniversityDaqing 163309P.R.China

Flesh firmness(FF) is an important and complex trait for melon breeders and consumers. However, the genetic mechanism underlying FF is unclear. Here, a soft fruit melon(P5) and a hard fruit melon(P10) were crossed to generate F2, and the FF and fruit-related traits were recorded for two years. By performing quantitative trait locus(QTL) specificlocus amplified fragment(SLAF)(QTL-SLAF) sequencing and molecular marker-linkage analysis, 112 844 SLAF markers were identified, and 5 919 SNPs were used to construct a genetic linkage map with a total genetic distance of1 356.49 cM. Ten FF-and fruit-related QTLs were identified. Consistent QTLs were detected for fruit length(FL) and fruit diameter(FD) in both years, and QTLs for single fruit weight(SFW) were detected on two separate chromosomes in both years. For FF, the consistent major locus(ff2.1) was located in a 0.17-Mb candidate region on chromosome 2. Using 429 F2individuals derived from a cross between P5 and P10, we refined the ff2.1 locus to a 28.3-kb region harboring three functional genes. These results provide not only a new candidate QTL for melon FF breeding but also a theoretical foundation for research on the mechanism underlying melon gene function.

关键词： QTL mapping flesh firmness fruit-related traits melon SLAF sequencing

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Evaluation of ambient mass spectrometry tools for assessing inherent postharvest pepper quality

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horticulture Research 2021年第1期8卷 2252-2259页

作者： Tyler J.Mason Harmonie M.Bettenhausen Jacqueline M.Chaparro Mark E.Uchanski Jessica E.Prenni department of horticulture and landscape architecture Colorado State UniversityFort CollinsCO 80524USA

Horticulturists are interested in evaluating how cultivar,environment,or production system inputs can affect postharvest *** mass spectrometry approaches enable analysis of minimally processed samples under ambient conditions and offer an attractive high-throughput alternative for assessing quality characteristics in plant ***,we evaluate direct analysis in real time(DART-MS)mass spectrometry and rapid evaporative ionization-mass spectrometry(REIMS)to assess quality characteristics in various pepper(Capsicum annuum L.)***-MS exhibited the ability to discriminate between pod colors and pungency based on chemical fingerprints,while REIMS could distinguish pepper market class(e.g.,bell,lunchbox,and popper).Furthermore,DART-MS analysis resulted in the putative detection of important bioactive compounds in human diet such as vitamin C,p-coumaric acid,and *** results of this study demonstrate the potential for these approaches as accessible and reliable tools for high throughput screening of pepper quality.

关键词： cultivar pepper ambient

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Reactive oxygen species and nitric oxide induce senescence of rudimentary leaves and the expression profiles of the related genes in Litchi chinensis

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horticulture Research 2018年第1期5卷 604-616页

作者： Haifang Yang Hye-Ji Kim Houbin Chen Yong Lu Xingyu Lu Congcong Wang Biyan Zhou College of horticulture South China Agricultural UniversityGuangzhou510642China department of horticulture and landscape architecture Purdue UniversityWest LafayetteIN47907-2010USA

Litchi is one of the most important subtropical evergreen fruit trees in southern *** studies indicated that high-temperature conditions encourage growth of rudimentary leaves in panicles and suppress *** have demonstrated that methyl viologen dichloride hydrate(MV)and sodium nitroprusside(SNP)promoted flowering in litchi partially by inhibiting the growth of rudimentary leaves via reactive oxygen species(ROS)and nitric oxide(NO).In the present study,we examined the microstructure and ultrastructure,programmed cell death(PCD)ratio,nuclei morphology of the rudimentary leaves,and the expression of senescence-related genes after the treatment with ROS or *** results showed that chromatins of the ROS-or NO-treated cells in the rudimentary leaves were *** of the cytoplasm-digesting vesicles with the vacuole and degradation of cytoplasm forming scattered debris were found in those of the treated *** with ROS or NO increased the cell PCD *** of the nuclei stained by propidium iodide(PI)showed that nuclei shape became irregular after the ROS or NO ***,the expression levels of LcRboh,LcMC-1-like,and LcPirin were higher in the ROS-and NO-treated rudimentary leaves than those in the control ones,suggesting that these genes may be involved in the ROS and NO-induced senescence and abscission of the rudimentary leaves in *** results suggested that ROS and NO play an important role in inducing the senescence of the rudimentary leaves,and ROS-and NO-induced PCD may be involved in the regulation of the rudimentary leaf growth in litchi.

关键词： leaves scattered debris

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Biosynthesis and molecular actions of specialized 1,4-naphthoquinone natural products produced by horticultural plants

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horticulture Research 2016年第1期3卷 88-104页

作者： Joshua R Widhalm David Rhodes department of horticulture and landscape architecture Purdue University625 Agriculture Mall DriveWest LafayetteIN 47907-2010USA

The 1,4-naphthoquinones(1,4-NQs)are a diverse group of natural products found in every kingdom of ***,including many horticultural species,collectively synthesize hundreds of specialized 1,4-NQs with ecological roles in plant–plant(allelopathy),plant–insect and plant–microbe *** horticultural plants producing 1,4-NQs have also served as sources of traditional medicines for hundreds of *** a result,horticultural species have been at the forefront of many basic studies conducted to understand the metabolism and function of specialized plant 1,*** 1,4-NQ natural products derived from horticultural plants have also emerged as promising scaffolds for developing new *** this review,the current understanding of the core metabolic pathways leading to plant 1,4-NQs is provided with additional emphasis on downstream natural products originating from horticultural *** overview on the biochemical mechanisms of action,both from an ecological and pharmacological perspective,of 1,4-NQs derived from horticultural plants is also *** addition,future directions for improving basic knowledge about plant 1,4-NQ metabolism are discussed.

关键词： metabolism hundreds specialized

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Exogenous ethylene influences flower opening of cut roses (Rosa hybrida) by regulating the genes encoding ethylene biosynthesis enzymes

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Science China(Life Sciences) 2005年第5期48卷 434-444页

作者： MA Nan1, CAI Lei1, LU Wangjin2, TAN Hui1 & GAO Junping1 1. department of Ornamental horticulture and landscape architecture, China Agricultural University, Beijing 100094, China 2. department of horticulture, South China Agricultural University, Guangzhou 510642,China 1. department of Ornamental horticulture and landscape architecture China Agricultural University 100094 Beijing China 2. department of horticulture South China Agricultural University 510642 Guangzhou China

The purpose of this paper is to investigate the differential responses of flower opening to ethylene in two cut rose cultivars, ‘Samantha’, whose opening process is promoted, and ‘Kardinal’, whose opening process is inhibited by ethylene. Ethylene production and 1- aminocyclopropane-1-carboxylate (ACC) synthase and oxidase activities were determined first. After ethylene treatment, ethylene production, ACC synthase (ACS) and ACC oxidase (ACO) activities in petals increased and peaked at the earlier stage (stage 3) in ‘Samantha’, and they were much more dramatically enhanced and peaked at the later stage (stage 4) in ‘Kardinal’ than control during vasing. cDNA fragments of three Rh-ACSs and one Rh- ACO genes were cloned and designated as Rh-ACS1, Rh-ACS2, Rh-ACS3 and Rh-ACO1 respectively. Northern blotting analysis revealed that, among three genes of ACS, ethylene-in- duced expression patterns of Rh-ACS3 gene corresponded to ACS activity and ethylene production in both cultivars. A more dramatic accumulation of Rh-ACS3 mRNA was induced by ethylene in ‘Kardinal’ than that of ‘Samantha’. As an ethylene action inhibitor, STS at concentration of 0.2 mmol/L generally inhib-ited the expression of Rh-ACSs and Rh-ACO in both cultivars, although it induced the expression of Rh-ACS3 transiently in ‘Kardinal’. Our results suggests that ‘Kardinal’ is more sensitive to ethylene than ‘Samantha’; and the changes of Rh-ACS3 expression caused by ethylene might be related to the acceleration of flower opening in ‘Samantha’ and the inhibition in ‘Kardinal’. Additional results indicated that three Rh-ACSs genes were differentially associated with flower opening and senescence as well as wounding.

关键词： cut rose (Rosa hybrida), flower opening, ethylene, 1-aminocyclopropane-1-carboxylic acid (ACC), ACC synthase (ACS), ACC oxidase (ACO), gene expression.

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