Results 31 to 40 of about 9,264 (142)

SWEET1‐mediated glucose transport is crucial for energy availability in Arabidopsis

open access: yesNew Phytologist, Volume 249, Issue 4, Page 1816-1830, February 2026.
Summary The stress‐responsive hormone abscisic acid (ABA) is known for its inhibitory effects on various physiological processes, including seed germination, often resulting in energy deprivation. Interestingly, ABA‐induced germination inhibition can be alleviated by exogenous glucose (Glc), mimicking a functional interplay between ABA and sugar ...
Xueyi Xue   +3 more
wiley   +1 more source

用于直流可控硅断路器的氧化锌陶瓷能量吸收器的研究

open access: yesDianci bileiqi, 1989
描述了低压直流可控硅电力断路器的性能及整体尺寸.认为其性能和整体尺寸是由回路切断的方法而决定.氧化锌陶瓷能量吸收器除了用于传统的高速断路器外,还是一种高能灭弧器件.在JEC标准中规定了在灭弧过程中的耐压、切断时间、浪涌能量及其详细的参数值.用于研制样品的直流1500V-3000A可控硅断路器的每一个能量吸收器是由24个φ115mm、厚度15mm的氧化锌阀片组成,其吸收能力为400kJ.这些被组装的元件在吸能器和可控硅断路器中的性能以及分立元件的性能已通过验证.
马萍
doaj  

压扭超材料填充柱壳撞击固壁的动态力学行为研究

open access: yes, 2023
航天器着陆时的冲击防护是保证航天器安全着陆的关键技术,针对航天器腿式着陆器对缓冲装置的需求,文章提出了一种新型能量吸收结构——将压扭双螺旋超材料填充于圆柱壳内部,并基于ABAQUS软件建立了该吸能结构的有限元计算模型,模拟了其撞击固壁时的动态力学行为,开展了系统的参数化研究分析。模拟和分析结果表明:1)由于耦合作用,填充了压扭双螺旋超材料的圆柱壳吸能盒的能量吸收能力逐渐会大于压扭双螺旋超材料和圆柱壳能量吸收的线性叠加;2)圆柱壳吸能盒壁厚和压扭双螺旋超材料连杆个数是影响其动态力学特性和能量吸收的关键参数。
刘兴华   +4 more
core  

Securing Bangladesh's Nuclear Future: Is the Regulated Asset Base Model the Answer to Address Project Corruption?

open access: yesJournal of Critical Infrastructure Policy, Volume 7, Issue 1, Spring/Summer 2026.
ABSTRACT Bangladesh's goal of achieving high‐income status by 2041 requires dependable, low‐emission, and affordable energy. With near‐universal grid coverage and increasing demand, nuclear energy is a strategic asset for long‐term baseload supply. However, the existing financing model, typified by the country's most expensive $12.65 billion Rooppur ...
Hafiz Ahmed
wiley   +1 more source

Template Engineering of Magnetic Nanoparticles Decorated on Porous Carbon for High‐Performance Multiband Electromagnetic Wave Absorption

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT Although magnetic carbon materials possess significant potential in the field of electromagnetic wave absorption (EWA) due to the synergistic effect of multiple attenuation mechanisms, the currently reported magnetic carbon EWA materials face some challenges, such as high cost, low yield, and easy agglomeration of the magnetic component ...
Bo Jiang   +9 more
wiley   +1 more source

掺杂Y2O3对ZnO-Bi2O3系压敏电阻片性能的影响

open access: yesDianci bileiqi, 2007
掺杂Y2O3可显著提高ZnO-Bi2O3系压敏电阻的电位梯度、能量吸收能力等电气性能,但会引起泄漏电流的增加。研究了不同烧成温度下,掺杂0~1.7%(摩尔分数)Y2O3对ZnO-Bi2O3压敏电阻片电气性能的影响。结果表明,在1140℃下,掺杂0.68%(摩尔分数)Y2O3,可获得具有300V/mm的电位梯度和370J/cm3能量吸收能力的高性能电阻片。此外,以FSM为主成分的“F”无机高阻层适宜于高梯度压敏电阻片的侧面绝缘,加速老化系数KCT小于1。
王玉平, 马军
doaj  

Boron Difluoride Chelated Aminoanthraquinone Photosensitizer for Type I Photodynamic Therapy

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT Type I photosensitizers capable of generating cytotoxic reactive oxygen species (ROS), with reduced oxygen dependence under photoirradiation, are regarded as a promising phototherapeutic approach for hypoxic solid tumors. Herein, based on the electron donor of 9‐phenyl‐carbazole (Cz) and the electron acceptor of anthraquinone (AQ ...
Tian Zhang   +8 more
wiley   +1 more source

不同水生植物吸收地表水中氮磷能力差异及其机理

open access: yesShuitu Baochi Xuebao, 2018
为查明不同水生植物吸收地表水中氮磷能力的差异及其机理,采用模拟沟渠试验和盆栽试验,研究了8种水生植物地表水中氮磷吸收能力的差异,并选择氮磷吸收能力差异较大的水生植物品种,进一步探讨了根系生理特性及底泥微生物量变化。结果表明:种植水生植物后沟渠水中氮磷浓度明显减少,供试8种水生植物中以海寿花、狐尾藻、珍珠梅、茭白、再力花的生物量大,养分吸收量多,沟渠水中养分减少也相对明显;种植水生植物后相对于不种植物的沟渠水中养分残留减少比例分别为,总氮22.4%~44.0%、铵态氮24.5%~36.8%、硝态氮13.6%
李旭霞   +5 more
doaj  

Constructing a Favorable Microenvironment for Robust Hydrogen Storage in MgH2 Through Synergistic Cooperation With Mn and Mg2Ni

open access: yesRare Metals, Volume 45, Issue 1, January 2026.
ABSTRACT Weakening the electrostatic attraction between Mg2+ ions and H− ions in MgH2 is vital for improving the kinetic performance of MgH2 for hydrogen storage. Herein, a multivalent microenvironment is synergistically created by Mn and Mg2Ni to break the stable structure of MgH2, enabling rapid and stable de/hydrogenation performance.
Ya‐Ke Wu   +7 more
wiley   +1 more source

The Behavior of RC Beams Strengthened by Using Web-Bonded Steel Plates

open access: yes, 2014
本研究進行一系列鋼筋混凝土樑側貼鋼鈑補強試驗研究,探討補強後形成複合樑構件之各種結構行為變化情形。試驗進行時,製作十字形鋼筋混凝土試體,並將鋼鈑黏結於樑體二側,載重則施加於柱頂端,以模擬樑柱節點補強受力行為。試驗變數方面,區分為強度提升需求、載重型式、模擬破壞程度、補強鋼鈑型式、鋼鈑厚度、加勁措施等數項。 試驗時藉由量測載重位移關係、載重應變關係等資料,以及試驗過程對於破壞現象的觀察紀錄等,探討補強樑的載重維持能力、勁度衰減行為、能量吸收性能、整體複合作用等結構行為變化 ...
jian-shian-guang, 簡顯光
core   +4 more sources

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