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小麦矮化育种的半矮秆基因源与新突变体

麦类作物学报 1981年第1期 12-16页

作者： c.f.konzak 岳大华

一、前言在世界上许多大麦育种计划中,已普遍利用拟直立型突变体(erectoides muntante)选育高度抗倒伏的矮秆大麦品种。关于拟直立型大麦突变体,甚至是几个染色体连锁群上许多位点的等位基因系列,都已进行了遗传学鉴定。但是,类似的突... 详细信息

一、前言在世界上许多大麦育种计划中,已普遍利用拟直立型突变体(erectoides muntante)选育高度抗倒伏的矮秆大麦品种。关于拟直立型大麦突变体,甚至是几个染色体连锁群上许多位点的等位基因系列,都已进行了遗传学鉴定。但是,类似的突变体在小麦育种上的利用则还刚刚开始。目前,只在少数育种计划中应用,而且只涉及有限的几个突变体,可能是六个广为利用的、来源于自

关键词：半矮秆基因突变体突变型小麦矮化育种

小麦矮化育种的半矮秆基因源与新突变体(续完)

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麦类作物学报 1981年第2期 20-23页

作者： c.f·konzak 岳大华

(二)突变体“Marfed ert 1”(cI13988) (1)起源:这是用乙基甲烷磺酸盐(EMS)处理小麦品种“Marfed”(cI11911),1961年从M(诱变第二代)分离的单株中选出的半矮秆突变体。同时选出的另一个突变体“WA5860”(见表二)也是有利用价值的。

关键词：突变体矮秆突变表现型突变型半矮秆基因亲本小麦矮化育种农艺性状单交组合完全显性杂交组合杂种组合

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禾谷类作物生长期十进制数字记载法

西藏农业科技 1990年第1期12卷 31-38页

作者： J.c.Zadoks T.T.chang c.f.konzak 王宗华

由 Zadoks 等研制的十进制数字记载法是世界上现行最为广泛使用的方法,特别是随着计算机在农业中的普遍应用.该方法更显出其在数椐储存,资料处理等方面的优点,为国际上很多从事农学,植物病理,生理及分类等学者所认可,为此特将此文翻译... 详细信息

由 Zadoks 等研制的十进制数字记载法是世界上现行最为广泛使用的方法,特别是随着计算机在农业中的普遍应用.该方法更显出其在数椐储存,资料处理等方面的优点,为国际上很多从事农学,植物病理,生理及分类等学者所认可,为此特将此文翻译介绍给大家,以利同行们在工作中使用。

关键词：十进制数字作物生长期植物病理资料处理蜡熟期扬花期二次休眠胚芽鞘禾谷类旗叶

Status and prospects for symmetric organic redox flow batteries

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Journal of Energy chemistry 2025年第1期100卷 125-143页

作者： Md Al Raihan c.Adam Dyker Department of chemistry University of New Brunswick

As environmental concerns from fossil fuel consumption intensify, large-scale energy storage becomes imperative for the integration of renewable sources like wind, hydro, and solar with the electrical *** flow batteries, particularly those employing organic molecules, are positioned as a key technology for this purpose. This review explores the growing field of symmetric organic redox flow batteries(ORfBs) within this context. Unlike traditional asymmetric designs based on unique active materials for each electrode, symmetric ORfBs involve a single bipolar species for both electrodes. This review highlights the benefits of a symmetric design, and categorizes five distinct classes of organic bipolar molecules used in both aqueous and non-aqueous solvents. By providing a comprehensive overview of their cell cycling and performance characteristics, the strengths and weaknesses of the diverse categories of bipolar molecules are highlighted for both solvent systems, as are opportunities for future development. This should guide new research directions and advance the development of practical symmetric ORfBs.

关键词： Redox flow battery Symmetric battery Organic battery Aqueous electrolyte Non-aqueous electrolyte

Acquired sensorineural hearing loss,oxidative stress,and microRNAs

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Neural Regeneration Research 2025年第9期20卷 2513-2519页

作者： Desmond A.Nunez Ru c.Guo Division of Otolaryngology–Head&Neck Surgery Department of SurgeryFaculty of MedicineThe University of British ColumbiaVancouverBCCanada Division of Otolaryngology–Head&Neck Surgery Gordon&Leslie Diamond Health Care CentreVancouver General HospitalVancouverBCCanada faculty of Medicine–The University of British columbia VancouverBCCanada

Hearing loss is the third leading cause of human ***-related hearing loss,one type of acquired sensorineural hearing loss,is largely responsible for this escalating global health ***-induced,ototoxic,and idiopathic sudden sensorineural are other less common types of acquired hearing *** etiology of these conditions is complex and multi-fa ctorial involving an interplay of genetic and environmental *** stress has recently been proposed as a likely linking cause in most types of acquired sensorineural hearing *** non-coding RNA sequences known as microRNAs(miRNAs)have increasingly been shown to play a role in cellular hypoxia and oxidative stress responses including promoting an apoptotic *** hair cell death is a central histopathological finding in sensorineural hearing *** these cells do not regenerate in humans,it underlies the irreversibility of human age-related hearing *** EMBASE,Ovid MEDLINE,Web of Science core collection,and *** databases over the period August 1,2018 to July 31,2023 were searched with"hearing loss,""hypoxamiRs,""hypoxia,""microRNAs,""ischemia,"and"oxidative stress"text words for English language primary study publications or registered clinical *** red clinical trials known to the senior author we re also assessed.A total of 222studies were thus *** excluding duplicates,editorials,retra ctions,secondary research studies,and non-English language articles,39 primary studies and clinical trials underwent full-text *** resulted in 11 animal,in vitro,and/or human subject journal articles and 8 registered clinical trial database entries which form the basis of this narrative *** miR-34a and miR-29b levels increase with age in *** miRNAs were demonstrated in human neuroblastoma and murine cochlear cell lines to target Sirtuin 1/peroxisome proliferato r-activated receptor gamma coactivator-1-alpha(SIRT1/P Gc-1α),SIRT

关键词： hearing loss hypoxia microRNAs oxidative stress sensorineural

Multiple sclerosis is at a checkpoint: advancing the program

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Neural Regeneration Research 2025年第3期20卷 811-812页

作者： Brandon c.Smith Jessica L.Williams Department of Neurosciences Lerner Research InstituteCleveland ClinicClevelandOHUSA Department of Biological Geologicaland Environmental SciencesCleveland State UniversityClevelandOHUSA

Multiple sclerosis(MS) is a chronic inflammatory and demyelinating disease of the central nervous system(cNS). Patients with MS experience sensory and motor function loss due to myelin and/or axon damage perpetuated b... 详细信息

关键词： Hauser sclerosis damage

THERMODYNAMIc VARIATIONAL APPROAcH fOR cLIMB Of AN EDGE DISLOcATION

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Acta Mechanica Solida Sinica 2009年第5期22卷 426-435页

作者： A.c.f.cocks Department of Engineering Science University of OxfordParks RoadOxfordOX1 3PJUK

A general thermodynamic variational approach is applied to study the force on an edge dislocation, which drives the dislocation to climb. Our attention is focused on the physical mechanism responsible for dislocation climb. A dislocation in a material element climbs as a result of vacancies diffusing into or out from the dislocation core, with the dislocation acting as a source or a sink for vacancy diffusion in the material element. The basic governing equations for dislocation climb and the climb forces on the dislocation are obtained naturally as a result of the present thermodynamic variational approach.

关键词： dislocation climb driving forces variational principle

High Strain Rate Superplasticity in a Micro-grained Al-Mg-Sc Alloy with Predominant High Angle Grain Boundaries

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Journal of Materials Science & Technology 2012年第11期28卷 1025-1030页

作者： f. c. Liu Z.Y. Ma f. c. Zhang Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of SciencesShenyang 110016 China State Key Laboratory of Metastable Materials Science and Technology Yanshan University Qinhuangdao 066004China

friction stir processing （fSP） was applied to extruded AI-Mg-Sc alloy to produce fine-grained microstructure with a grain size of 2.2μm. Electron backscatter diffraction （EBSD） result showed that the grain boundary misorientation distribution was very close to a random grain assembly for randomly oriented cubes. Super- plastic investigations in the temperature range of 425-500 ℃ and strain rate range of 1x100^-2-1x10 s^-1 showed that a maximum elongation of 1500% was achieved at 475 ℃ and a high strain rate of 1x100^-2-1x10 s^-1. The fSP AI-Mg-Sc exhibited enhanced superplastic deformation kinetics compared to that predicted by the constitutive relationship for superplasticity in fine-grained aluminum alloys. The origin for enhanced superplas- tic deformation kinetics in the fSP alloy can be attributed to its high fraction of high angle grain boundaries （HAGBs）. The analyses of the superplastic data and scanning electron microscopy （SEM） examinations on the surfaces of deformed specimens indicated that grain boundary sliding is the main superplastic deformation mechanism for the fSP AI-Mg-Sc alloy.

关键词： Superplasticity friction stir processing Aluminum Microstructure friction stir welding

Engineering vibration monitoring by GPS:long duration records

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Earthquake Engineering and Engineering Vibration 2009年第3期8卷 459-467页

作者： f.casciati c.fuggini Department of Structural Mechanics University of PaviaItaly

Monitoring the performance of any structure requires real-time measurements of the change of position of critical points. Different techniques can be used for this purpose, each one offering advantages and disadvantages. The technique based on satellite positioning systems （GPS, GLONASS and the future GALILEO） seems to be very promising at least for long period structures. The GPS in particular provides sampling rates that are able to track dynamic displacements with high accuracy. Its service ability is independent of atmospheric conditions, temperature variations and visibility of the monitored object. This paper investigates the reliability and accuracy of the measurements of dual frequency GPS receivers. A linear electromagnetic motor moves an object along a given direction. The changes of position are compared witb their estimates as recorded by a GPS receiver, whose antenna is located on the reference object. The comparison is based on sufficiently long records.

关键词： infrastructure monitoring global positioning system (GPS) delay positioning errors multi-path error signal geometric dilution of precision linear motor amplitudes power spectral densities