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DNA methylation controlling abscisic acid catabolism responds to light to mediate strawberry fruit ripening

Journal of Integrative Plant Biology 2024年第8期66卷 1718-1734页

作者： Yunfan Sun Xiaofang Yang Rongrong Wu Shouzheng Lv Yunduan Li Haoran Jia Yuying Yang Baijun Li Wenbo chen Andrew c.Allan Guihua Jiang Yan-Na Shi Kunsong chen college of Agriculture&Biotechnology Zhejiang UniversityZijingang CampusHangzhou 310058China Institute of Horticulture Zhejiang Academy of Agricultural SciencesHangzhouZhejiang 310021China Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology Zhejiang UniversityZijingang CampusHangzhou 310058China The State Agriculture Ministry Laboratory of Horticultural Plant Growth Development and Quality ImprovementZhejiang UniversityZijingang CampusHangzhou 310058China New Zealand Institute for Plant&Food Research Limited Private Bag 92169AucklandNew Zealand School of Biological Sciences University of AucklandPrivate Bag 92019AucklandNew Zealand

Phytohormones,epigenetic regulation and environmental factors regulate fruit ripening but their interplay during strawberry fruit ripening remains to be *** this study,bagged strawberry fruit exhibited delayed ripening compared with fruit grown in normal light,correlating with reduced abscisic acid(ABA) *** of the key ABA catabolism gene,ABA 8′-hydroxylase FacYP707A4,was induced in bagged *** light exc.usion whole genome DNA methylation levels were up-regulated,corresponding to a delayed ripening process,while DNA methylation levels in the promoter of FacYP707A4 were suppressed,correlating with increases in transcript and decreased ABA *** indicated FacRY1,a blue light receptor repressed in bagged fruit and FaAGO4,a key protein involved in RNA-directed DNA methylation,c.uld bind to the promoter of *** interaction between FacRY1 and FaAGO4,and an increased enrichment of FaAGO4 directed to the FacYP707A4 promoter in fruit grown under light suggests FacRY1 may influence FaAGO4 to modulate the DNA methylation status of the FacYP707A4 ***,transient overexpression of FacRY1,or an increase in FacRY1 transcription by blue light treatment,increases the methylation level of the FacYP707A4 promoter,while transient RNA interference of FacRY1 displayed opposite *** findings reveal a mechanism by which DNA methylation influences ABA catabolism,and participates in light-mediated strawberry ripening.

关键词： ABA catabolism DNA methylation light ripening strawberry

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多传感器信息融合的天线促动器故障诊断

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电子机械工程 2024年第3期40卷 9-16页

作者：薛松潘成辉张子涵连培园赵武林许谦王从思西安电子科技大学高性能电子装备机电集成制造全国重点实验室陕西西安710071 西安电子科技大学广州研究院广东广州510555 中国航天科工集团第六研究院内蒙古航天红岗机械有限公司内蒙古呼和浩特010076 中国电子科技集团公司第三十九研究所陕西西安710065 中国科学院新疆天文台新疆乌鲁木齐830011

促动器作为天线主动面的唯一调整装置,是保障天线反射面精度的关键部件,因此对促动器健康状态的监测至关重要。文中针对单个传感器诊断存在数据维度有限且现有工程数据稀缺的问题,提出了一种连续小波变换与组归一化并行卷积神经网络(con... 详细信息

促动器作为天线主动面的唯一调整装置,是保障天线反射面精度的关键部件,因此对促动器健康状态的监测至关重要。文中针对单个传感器诊断存在数据维度有限且现有工程数据稀缺的问题,提出了一种连续小波变换与组归一化并行卷积神经网络(continuous Wavelet Transform-Group Normalization Parallel convolutional Neural Networks,cWT-GPcNN)的故障诊断方法。首先建立cWT-GPcNN的故障诊断模型,引用组归一化技术加快网络收敛速度并提高诊断精度;然后通过评估超参数对模型性能的影响,确定诊断的最佳模型;最后,采用促动器传动系统实验数据集对所提方法进行验证,实验结果表明所建模型具有较好的泛化能力及多传感器融合的优越性。文中对多传感器融合与单传感器的诊断性能进行了比较,结果证明了多传感器融合诊断的优越性。此外,还对cWT-GPcNN模型与其他3种信息融合模型进行了比较。cWT-GPcNN模型的准确率高达93%,表明它具有良好的诊断性能。

关键词：大口径天线促动器多传感器信息融合故障诊断

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有机化学实验教学在应用型人才培养中的改革探索

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化工管理 2024年第26期 31-34页

作者：钟海艺霍丽妮贾智若李培源卢澄生冯旭广西中医药大学药学院广西南宁530200

随着中国对中医药发展的不断重视,中药学应用型人才需求日益增长。实验实践教学作为应用型人才培养的重要途径之一,改革创新也迫在眉睫。有机化学实验是中药学等专业的基础实验课程之一,能帮助学生对理论课知识进行印证与理解,可为后续... 详细信息

随着中国对中医药发展的不断重视,中药学应用型人才需求日益增长。实验实践教学作为应用型人才培养的重要途径之一,改革创新也迫在眉睫。有机化学实验是中药学等专业的基础实验课程之一,能帮助学生对理论课知识进行印证与理解,可为后续专业课程学习与应用奠定基础。文章在广西特色中药现代产业学院建设背景下,分析了传统有机化学实验教学中存在的问题,并利用MOOc、SPOc、雨课堂和虚拟仿真等平台,实践总结了以应用型人才培养为目标的多平台混合式教学模式在有机化学实验课程中的教学效果,从中获得了一些启发与思考,可为有机化学实验课程教学改革提供思路与方法。

关键词：有机化学实验应用型人才培养混合式教学现代产业学院

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Influence of surface liquid segregation on corrosion behavior of semi-solid metal high pressure die cast aluminium alloys

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中国有色金属学会会刊：英文版 2010年第S3期20卷 837-841页

作者： E.P.MASuKu H.MLLER u.A.cuRLE P.c.PISTORIuS Materials Science and Manufac.uring Council for Scientific Industrial ResearchPretoriaSouth Africa Department of Materials Science and Engineering Carnegie Mellon UniversityPittsburghUSA

The corrosion behavior(in chloride medium) of the surface layer of SSM-HPDc plates of alloys 7075-T6 and 2024-T6 was compared with that of the wrought alloys 7075-T6 and *** testing was performed in deaerated 3.5%Nacl *** separate tests,the open-circuit potential was monitored in aerated 3.5% Nacl for 30 min after *** electrochemical tests show that there is no significant difference in the pitting potential of the wrought alloys and that of the cu-enriched surfaces of the SSM-HPDc alloys.

关键词： semi-solid metal(SSM) forming wrought aluminium alloys alloy 7075 alloy 2024 corrosion surface liquid segregation

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江南造山带东段地区三堡铅锌矿床花岗闪长斑岩的形成年代、地球化学特征及成矿指示

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大地构造与成矿学 2024年第4期48卷 879-898页

作者：侯舒雅张达玉张飞雷行行胡梦祥翁望飞 Noel c White 合肥工业大学资源与环境工程学院安徽合肥230009 安徽省地质矿产勘查局332地质队安徽黄山245000

三堡铅锌矿床位于江南古陆北部,其成矿作用与花岗闪长斑岩密切相关。本文在地质特征和岩相学认识基础上,对与三堡铅锌矿床相关的花岗闪长斑岩开展了锆石LA-IcP-MS u-Pb同位素年代学、全岩地球化学和Sr-Nd同位素分析。结果显示,三堡花岗... 详细信息

三堡铅锌矿床位于江南古陆北部,其成矿作用与花岗闪长斑岩密切相关。本文在地质特征和岩相学认识基础上,对与三堡铅锌矿床相关的花岗闪长斑岩开展了锆石LA-IcP-MS u-Pb同位素年代学、全岩地球化学和Sr-Nd同位素分析。结果显示,三堡花岗闪长斑岩锆石u-Pb年龄为154.8±1.8 Ma,为晚侏罗世。三堡花岗闪长斑岩SiO_(2)含量为63.75%~67.47%,Na_(2)O+K_(2)O为3.92%~7.34%,为高钾钙碱性、准铝质‒弱过铝质的I型花岗岩;且样品富集轻稀土元素(LREE/HREE=10.50~11.29)、显示弱负Eu异常(δEu=0.68~0.77),富集Rb、Th、u、K等大离子亲石元素,亏损P、Ti、Yb等高场强元素。花岗闪长斑岩(^(87)Sr/^(86)Sr)i值为0.71028~0.71320,ε_(Nd)(t)值在-6.57~-5.55之间。岩石地球化学特征显示,三堡花岗闪长斑岩熔体来自壳幔混合源区,上升过程中经历了显著的结晶分异作用。结合区域资料对比显示,三堡铅锌矿床为江南造山带东段地区燕山期早阶段(177~153 Ma)铜铅锌成矿作用的重要组成部分,该花岗闪长斑岩所呈现的中低结晶温度、较低分异程度、较高氧逸度与水含量是该区中酸性岩浆岩的成矿专属性指标。

关键词：花岗闪长斑岩成岩年代岩石成因成矿专属性江南造山带东段地区

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current Soil Nutrient Status of Intensively Managed Greenhouses

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Pedosphere 2012年第6期22卷 825-833页

作者： Hu Yun-cai SONG Zhi-Wen Lu Wen-Long c. POScHENRIEDER u. ScHMIDHALTER chair of Plant Nutrition Technische Universitat Miinchen D-85350 Freising (Germany) Institute of Information Tianjin Academy of Agricultural Sciences Tianjin (China)

Nine districts covering the main greenhouse vegetable areas in Tianjin Municipality of the North china Plain were selected for the soil investigation in 2010 to survey the current soil nutrient status (soil available N, P and K), acidification and salinization due to excessive input of fertilizers in greenhouses in Tianjin. The study showed that, in particular, soil available P content increased with the age of greenhouses. In contrast, our results did not reveal higher K ac.umulation and lowered pH in the greenhouse soils compared with cultivation in open fields. Over-fertilization, c.using high NO 3 ac.umulation, most likely resulted in salinity problems in the greenhouses. Ninety percent of the investigated greenhouse soils had electrical conductivity values of saturated paste extracts of 2-10 d S m-1 , which might affect the yields of vegetable crops like green bean, pepper, cabbage, carrot, eggplant, lettuce, spinach, celery, cucumber and tomato. The findings of our survey of the current fertility and salinity problems in greenhouse soils suggest that there is an urgent need to improve the farmers' practices and strategies in fertilization management in greenhouses of china. Bec.use education and the agricultural technical extension services may play a more important role in avoiding overuse of fertilizers, we suggest that current nutrient management practices should be improved in the near future through training of local farmers in farmers' schools and through strengthening the agricultural extension services with practical techniques.

关键词： electrical conductivity greenhouse vegetables over-fertilization soil pH soil survey

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Slip flow of MHD casson fluid in an inclined channel with variable transport properties

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communications in Theoretical Physics 2020年第9期72卷 21-38页

作者： K V Prasad Hanumesh Vaidya c Rajashekhar Sami ullah Khan G Manjunatha J u Viharika Department of Mathematics Vijayanagara Sri Krishnadevaraya UniversityVinayaka NagarBallari-583105KarnatakaIndia Bhaskaracharya Study chair Karnataka State Akkamahadevi Women's UniversityVijayapuraKarnatakaIndia Department of Mathematics COMSTAS University IslamabadSahiwal Campus 54000Pakistan Department of Mathematics Manipal Institute of TechnologyManipal Academy of Higher EducationManipalKarnataka576104-India

Due to the instructive role of the peristaltic phenomenon in the human body, interests have been developed in recent years towards peristaltic transport with various thermo-physical *** current investigation reveals the effects of the magnetic field and variable transport properties on the peristaltic transport of a casson fluid slip flow through an inclined *** c.upled partial differential equations regulate the fluid flow. Through the perturbation method, the momentum and energy equations are solved for small values of variable viscosity and thermal conductivity, and the closed-form solution is obtained for mass transfer. The impact on physiological quantities of related parameters of interest is evaluated and discussed via graphs. The results obtained for the current flow represent some interesting behaviors which have applications in the biomedical field.

关键词： velocity slip thermal slip concentration slip variable viscosity yield stress

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Isotope implications of groundwater recharge,residence time and hydrogeochemical evolution of the Longdong Loess Basin,Northwest china

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Journal of Arid Land 2022年第1期14卷 34-55页

作者： LING Xinying MA Jinzhu cHEN peiyuan LIu changjie Juske HORITA Key Laboratory of Western china's Environmental System(Ministry of Education) Lanzhou UniversityLanzhou 730000China Department of Geosciences Texas Tech UniversityLubbock TX79409USA

Groundwater plays a dominant role in the eco-environmental protection of arid and semi-arid *** the sources and mechanisms of groundwater recharge,the interactions between groundwater and surface water and the hydrogeochemical evolution and transport processes of groundwater in the Longdong Loess Basin,Northwest china,is of importance for water resources management in this ecologically sensitive *** this study,71 groundwater samples(mainly distributed at the Dongzhi Tableland and along the Malian River)and 8 surface water samples from the Malian River were collected,and analysis of the aquifer system and hydrological conditions,together with hydrogeochemical and isotopic techniques were used to investigate groundwater sources,residence time and their associated recharge *** show that the middle and lower reaches of the Malian River receive water mainly from groundwater discharge on both sides of valley,while the source of the Malian River mainly comes from local *** of the Dongzhi Tableland is of a HcO3-ca-Na type with low *** reverse hydrogeochemical simulation suggests that the dissolution of carbonate minerals and cation exchange between ca^(2+),Mg^(2+)and Na+are the main water-rock interactions in the groundwater system of the Dongzhi ***δ^(18)O(from-11.70‰to-8.52‰)andδ2H(from-86.15‰to-65.75‰)values of groundwater are lower than the annual weighted average value of precipitation but closer to summer-autumn precipitation and soil water in the unsaturated zone,suggesting that possible recharge comes from the summer-autumn monsoonal heavy precipitation in the recent past(≤220 a).The corrected 14c ages of groundwater range from 3,000 to 25,000 a old,indicating that groundwater was mainly from precipitation during the humid and cold Late Pleistocene and Holocene *** flows deeper from the groundwater table and from the center to the east,south and west of the Dongzhi Tableland

关键词： groundwater recharge hydrogeochemical evolution isotope technology 14c dating paleoclimate residence time chinese Loess Plateau

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LONGITuDINAL DISPERSION IN SEDIMENT-LADEN OPEN cHANNEL FLOWS

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International Journal of Sediment Research 2004年第1期19卷 1-14页

作者： Z.AHMAD,u.c.KOTHYARI,K.G.RANGA RAJu Asst.Professor of civil Engineering Indian Inst.of Tech. Roorkee(Formerly university of Roorkee) ROORKEE-247 667 INDIA Professor of civil Engineering Indian Inst. of Tech. Roorkee ROORKEE-247 667 INDIA. Professor of civil Engineering Indian Inst. of Tech. Roorkee ROORKEE-247 667 INDIA.

Laboratory experiments on longitudinal dispersion in clear-water and sediment-laden open channel flows are reported. Data from these experiments and those available from previous studies indicate that the suspended sediment present in the flow affects the longitudinal dispersion process. The observed velocity distributions over the depth of sediment-laden flows indicate that the velocity deviates from the mean velocity more in sediment-laden flows than in clear-water flows. The velocity distributions over the cross section and secondary flow in the channel are also expected to be altered due to the presence of suspended sediments in the flow. For these reasons, more dispersion is found in sediment-laden flows than in corresponding clear-water flows. A predictor for the dispersion coefficient in sediment-laden flows is proposed.

关键词： Longitudinal dispersion Open channel Sediment-laden flow Pollutants Velocity distribution

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Effects of moisture content and feed rate on milling characteristics of wild apricot pits (Prunus armeniaca L.)

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International Journal of Agricultural and Biological Engineering 2014年第1期7卷 103-110页

作者： A.E.Kate u.c.Lohani N.c.Shahi J.P.Pandey A.Sarkar Khan chand Department of Post Harvest Process&Food Engineering College of TechnologyG.B.Pant University of Agriculture and TechnologyPantnagarU.S.Nagar(Uttarakhand)-263145India Department of agricultural and Biological Engineering South Dakota State UniversityBrookingsSD 57006USA

Milling with decortication of wild apricot pits was done in wild apricot pit decorticator working on the principle of“impact and compression”.The milling characteristics inc.udes decortication efficiency,percentage of husk,percentage of broken kernels and output capacity was evaluated at the different levels of moisture content,i.e.,8%,10%,12%,14%and 16%(w.b.)and feed rates,i.e.,12 g/stroke,14 g/stroke,16 g/stroke,18 g/stroke and 20 g/*** moisture content as well as feed rate significantly(Pcted the decortication efficiency,percentage of husk as well as brokens and output *** efficiency was initially increased and then decreased and opposite nature was found for the percentage of *** percentage of broken kernels and output capacity decreases with the increase in moisture content,while output capacity increases with the increase in feed rate and brokens decreases with the increase in feed rate of wild apricot pits.

关键词： wild apricot pit milling characteristics decortication efficiency moisture content husk percentage broken percentage output capacity

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