Results 21 to 30 of about 12,798 (158)

TOC1 in Nicotiana attenuata regulates efficient allocation of nitrogen to defense metabolites under herbivory stress

open access: yesNew Phytologist, Volume 228, Issue 4, Page 1227-1242, November 2020., 2020
Summary The circadian clock contextualizes plant responses to environmental signals. Plants use temporal information to respond to herbivory, but many of the functional roles of circadian clock components in these responses, and their contribution to fitness, remain unknown.
Henrique Valim   +7 more
wiley   +1 more source

Origin of the early Cenozoic belt boundary thrust and Izanagi–Pacific ridge subduction in the western Pacific margin

open access: yesIsland Arc, Volume 28, Issue 5, September 2019., 2019
The ridge subduction hypothesis is consistent with the cessation of magmatic activity along the continental margin and the presence of an unconformity in the forearc basin in the western Pacific margin. A Izanagi–Pacific ridge subduction model revises the classic hypothesis of a great reorganization of the Eocene Pacific Plate motion and the Oligocene ...
Gaku Kimura   +5 more
wiley   +1 more source

International clinical practice recommendations on the definition, diagnosis, assessment, intervention, and psychosocial aspects of developmental coordination disorder – Chinese (Mandarin) translation

open access: yesDevelopmental Medicine &Child Neurology, Volume 61, Issue 3, Page E1-E35, March 2019., 2019
目的 本国际临床指南由欧洲残疾儿童学会(the European Academy of Childhood Disability,EACD)牵头制定,旨在解决发育性协调障碍(developmental coordination disorder,DCD)的定义、诊断、评估、干预以及与社会心理方面的临床应用关键问题。 方法 本指南针对五个领域的关键问题,通过文献综述和专家团队的正式讨论达成共识。为保证指南的循证基础,以“机制”、“评估”和“干预”为检索词, 对2012年更新以来提出的最新建议以及新增的“社会心理问题”和“青少年/成人”为检索词进行检索。根据牛津大学循证医学中心证据等级 (证据水平 [level of evidence, LOE]1–4) 将结果进行分类,最终转化为指南建议。并由国际 ...
Jing Hua   +6 more
wiley   +1 more source

Extranuclear function of Arabidopsis HOOKLESS1 regulates pleiotropic developmental processes in a non‐cell‐autonomous manner

open access: yesNew Phytologist, Volume 246, Issue 2, Page 616-630, April 2025.
Summary N‐acetyltransferase HOOKLESS1 (HLS1) in Arabidopsis, a recognized pivotal factor in hook formation, is also implicated in multifaceted developmental processes including plastochron and leaf senescence. However, its molecular function remains to be elucidated.
Takashi Nobusawa   +5 more
wiley   +1 more source

The asymmetry engine: how plants harness asymmetries to shape their bodies

open access: yesNew Phytologist, Volume 245, Issue 6, Page 2422-2427, March 2025.
Summary Plant development depends on growth asymmetry to establish body plans and adapt to environmental stimuli. We explore how plants initiate, propagate, and regulate organ‐wide growth asymmetries. External cues, such as light and gravity, and internal signals, including stochastic cellular growth variability, drive these asymmetries.
Kristoffer Jonsson   +2 more
wiley   +1 more source

基于ECBL理论的冷弯薄壁型钢柱相关屈曲研究

open access: yesJianzhu Gangjiegou Jinzhan, 2019
为研究冷弯薄壁型钢柱的相关屈曲,介绍了一种分析柱构件相关屈曲的方法——临界分叉荷载侵蚀理论(ECBL理论)。该方法考虑了试件在截面屈曲(局部屈曲或畸变屈曲)和整体屈曲(弯曲屈曲、扭转屈曲或弯扭屈曲)相互作用下的稳定极限承载力,通过评估、量化构件的侵蚀因子和缺陷因子使Ayrton-Perry方程表示的屈曲曲线适用于冷弯薄壁型钢构件的相关屈曲分析。利用此理论对我国既有的部分冷弯薄壁型钢柱试验数据和有限元分析结果进行了处理,提出了对应的相关屈曲曲线。
姚永红, 邵博
doaj  

受弯的冷弯卷边槽钢畸变屈曲强度和其相关屈曲承载力

open access: yesJianzhu Gangjiegou Jinzhan, 2009
受弯的冷弯薄壁卷边槽钢基本上有板件局部屈曲,截面畸变屈曲和构件弯扭屈曲三种屈曲模式,随后有它们之间的相关屈曲。由于畸变屈曲模式对缺陷的敏感度高,因此其屈曲后强度提高的幅度远低于局部屈曲模式。但是与局部屈曲模式相比,畸变屈曲模式抵抗破坏的能力却很强。可以用有限单元法计算受弯卷边槽钢截面的畸变屈曲强度。本文介绍了澳大利亚-新西兰标准AS/NZS4600-2005,用手算法计算受弯卷边槽钢截面的弹性畸变屈曲应力,並用直接强度法计算其相关的屈曲承载力。
陈骥
doaj  

リンゴ コウギョク ノ ゴムビョウ ニカンスル ケンキュウ ダイ1ポウ : カニク ノ ブツリテキ セイシツ ニツイテ [PDF]

open access: yes, 1973
【緒言】リンゴの冷温貯蔵中に発生する生理障害の一つにゴム病があり,とくに紅玉ではその被害は甚大である.この病気の初期の症状は外観では分りにくい.しかし被害部を手で圧すると凹み,離すとゴムのように元に戻ることから容易に判別出来る.さらにこのような果実の被害部を切断すると,表皮直下の果肉および維管束が褐変しているのが見られる.島氏は本病について詳細な研究を行ない,紅玉に発生しやすいこと,大果および過熟果に発生しやすいこと.黒点病発生果はかかりにくいこと,等を明らかにした ...
福島 忠昭
core   +1 more source

三重钢管防屈曲支撑中防屈曲套管设计方法研究

open access: yesJianzhu Gangjiegou Jinzhan, 2019
基于套管边缘屈服准则,给出了由三重钢管组成的防屈曲支撑中防屈曲套管的设计方法,并通过有限元模型对设计方法进行了验证。三重钢管防屈曲支撑是由提供轴向刚度和承载力并耗散地震能量的芯材钢管,以及限制芯材整体屈曲和局部屈曲的外套管和内套管组成。当支撑芯材钢管屈服后,防屈曲支撑的弯曲刚度全部由内防屈曲套管和外防屈曲套管提供。考虑芯材钢管二阶弯矩对套管的弯矩作用,依据外套管边缘纤维不发生屈服的原则,确定防屈曲支撑允许的最大弯曲变形,进而确定了防屈曲支撑套管的刚度和截面尺寸。有限元分析结果表明,在不同芯材径厚比 ...
肖邵文   +8 more
doaj  

TMSR控制棒通道套管的蠕变屈曲失稳分析

open access: yesHe jishu
钍基熔盐堆(Thorium Molten Salt Reactor,TMSR)控制棒通道套管是典型的承受外压的高温薄壁长圆柱壳,蠕变-屈曲失稳是其主要失效模式。本文旨在利用数值模拟方法研究控制棒通道套管高温下的蠕变屈曲失稳行为。首先基于UNS N10003合金的高温蠕变试验数据获得了该材料的Norton蠕变模型及材料参数;然后利用有限元分析软件ABAQUS进行了TMSR控制棒通道套管的特征值屈曲分析与蠕变屈曲分析,并对屈曲失稳的关键因素进行了敏感性分析,获得了蠕变屈曲寿命的经验公式。分析结果表明,温度 ...
王 晓艳   +4 more
doaj   +1 more source

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