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Reducing the carbon emissions from Qianxi tomato fruits preservation by cold atmospheric plasma

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International Journal of Agricultural and Biological Engineering 2023年第5期16卷 213-220页

作者： Tao Jin Yan Chen Chenwei Dai Jimin Deng qinghua xu Zhengwei Wu School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China Joint Laboratory of Plasma Application Technology Institute of Advanced TechnologyUniversity of Science and Technology of ChinaHefei 230031China Anhui Academy of Medical Sciences Hefei 230061China Anhui Institute for Food and Drug Control Hefei 230051China CAS Key Laboratory of Geospace Environment University of Science and Technology of ChinaHefei 230026China

China has pledged to reach its dual-carbon goals(i.e.,carbon peak and carbon neutrality)at the end of 2060.To reduce carbon emission in food preservation industry,the preservation effects of cold atmospheric plasma intermittent treatment(1 min/6 h each day,PL4)combined with 15℃ and 4℃ only on Qianxi tomato fruits during 7 d storage were investigated.Results indicated that the firmness,L*,sensory taste,glutathione(GSH)content,mineral(Fe,P,K)content,polyphenol oxidase activity of PL4 tomatoes were significantly increased than that in Control during earlier period storage,with worse weight loss,titratable acid,a*,b*,lycopene content,·OH radical scavenging capacity and same moisture content,total soluble solids,polysaccharide content,total phenolics content,total flavonoid content,ascorbic acid content,1,1-diphenyl-2-picrylhydrazyl radical scavenging capacity,pectin methylesterase activity.Moreover,the power and R134a consumption of PL4 were highly decreased by around 56.4 kW·h and 0.3 g respectively during whole storage as compared to Control,and reduced more than 99.8%carbon emission based on equipment using stage.All in all,this study illustrated that PL4 treatment can be applied as an ecofriendly,low carbon and sustainable preservation strategy for short-term storage of fruits under 4℃ or higher temperature.

关键词： cold atmospheric plasma carbon reduction Qianxi tomato fruits food preservation

Recent results on nucleon spin structure study at RHIC

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Frontiers of physics 2015年第6期10卷 51-57页

作者： qinghua xu School of Physics Key Laboratory of Particle Physics and Particle Irradiation (MoE) Shandong University Jinan 250100 China

在在 Brookhaven 国家实验室的相对论的重离子 Collider (RHIC ) 的 PHENIX 和星实验在 \(\sqrt s \) 正在运用极化的 protonproton 碰撞 = 200 和 500 GeV。RHIC 旋转物理节目的主要目标是获得更深的卓见进核子的旋转结构。我们将从 RH... 详细信息

在在 Brookhaven 国家实验室的相对论的重离子 Collider (RHIC ) 的 PHENIX 和星实验在 \(\sqrt s \) 正在运用极化的 protonproton 碰撞 = 200 和 500 GeV。RHIC 旋转物理节目的主要目标是获得更深的卓见进核子的旋转结构。我们将从 RHIC 给最近的旋转结果的概述，特别地，经由喷气 / 强子生产的 gluon 极化的学习和经由在纵的 W 波色子生产的海夸克极化极化了 protonproton 碰撞。

关键词： RHIC 自旋结构核子重离子对撞机国家实验室 PHENIX STAR 自旋物理

The Coefficient Inequalities for a Class of Holomorphic Mappings in Several Complex Variables

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Chinese Annals of Mathematics,Series B 2020年第1期41卷 37-48页

作者： qinghua xu Taishun LIU Xiaosong LIU School of Science Zhejiang University of Science and TechnologyHangzhou 310023China Department of Mathematics Huzhou Teacher’s UniversityHuzhou 313000ZhejiangChina School of Mathematics and Computation Science Lingnan Normal UniversityZhanjiang 524048GuangdongChina

The authors establish the coefficient inequalities for a class of holomorphic mappings on the unit ball in a complex Banach space or on the unit polydisk in C^n,which are natural extensions to higher dimensions of som... 详细信息

关键词： Coefficient inequality Fekete-Szego problem Quasi-convex mappings

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Highly sensitive and selective two-photon sensing of cartap using Au@Ag core-shell nanoparticles

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Science China Chemistry 2016年第1期59卷 78-82页

作者： Peiyan Yuan Rizhao Ma qinghua xu Department of Chemistry National University of Singapore

A highly sensitive and selective two-photon sensing scheme for detection of cartap was developed by using Au@Ag bimetallic core-shell nanoparticles.Cartap was found to induce the aggregation of Au@Ag nanoparticles and up to 700-fold enhancement in two-photon photoluminescence.Huge enhancement in two-photon photoluminescence allows achieving a detection limit of as low as 0.0062 mg/kg,which is better than the conventional colorimetric methods.This two-photon sensing scheme has a broad dynamic range and displays excellent selectivity in detection of cartap against over other ten kinds of commonly used insecticides.

关键词： Ag纳米粒子双光子荧光高灵敏度杀螟丹传感高选择性核壳选择性检测

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Sharp distortion theorems for a subclass of close-to-convex mappings

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Frontiers of Mathematics in China 2013年第6期8卷 1425-1436页

作者： qinghua xu Taishun LIU Xiaosong LIU College of Mathematics and Information Science Jiangxi Normal University Nanchang 330022 China Department of Mathematics Huzhou Teachers College Huzhou 313000 China School of Mathematics and Computation Science Zhanjiang Normal University Zhanjiang 524048 China

我们介绍班强烈在一个复杂 Banach 空格的联合起来的球的顺序的 close-to-convex mappings，然后，我们在 n 在复杂 Hilbert 空间 X 或单位 polydisc 的联合起来的球为 mappings 的这个班给锋利的失真定理。作为应用，一条锋利的生长定... 详细信息

我们介绍班强烈在一个复杂 Banach 空格的联合起来的球的顺序的 close-to-convex mappings，然后，我们在 n 在复杂 Hilbert 空间 X 或单位 polydisc 的联合起来的球为 mappings 的这个班给锋利的失真定理。作为应用，一条锋利的生长定理为强烈，顺序的 close-to-convex mappings 被获得。

关键词：凹凸映射增长定理失真复Hilbert空间复Banach空间子类夏普单位球

Fekete and Szeg problem in one and higher dimensions

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Science China Mathematics 2018年第10期61卷 1775-1788页

作者： qinghua xu Taishun Liu Xiaosong Liu School of Science Zhejiang University of Science and Technology Hangzhou 310023 China Department of Mathematics Huzhou University Huzhou 313000 China School of Mathematics and Computation Science Lingnan Normal University Zhanjiang 524048 China

In this paper, we establish the Fekete and Szeg inequality for a class of holomorphic functions in the unit disk, and then we extend this result to a class of holomorphic mappings on the unit ball in a complex Banac... 详细信息

关键词：尺寸 Banach 函数 Cn

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Fekete and Szego problem for a subclass of quasi-convex mappings in several complex variables

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Frontiers of Mathematics in China 2015年第6期10卷 1461-1472页

作者： qinghua xu Ting YANG Taishun LIU Huiming xu College of Mathematics and Information Science Jiangxi Normal University Nanchang 330022 China Department of Mathematics Huzhou University Huzhou 313000 China College of Mathematics Physics and Information Engineering Zhejiang Normal UniversityJinhua 321004 China

Let K be the familiar class of normalized convex functions in the unit disk. Keogh and Merkes proved the well-known result that maxf∈A ｜a3 - λa22｜ ≤ max{1/3, ｜λ - 1}, ,λ ∈ C, and the estimate is sharp for each ∈. We investigate the corresponding problem for a subclass of quasi-convex mappings of type B defined on the unit ball in a complex Banach space or on the unit polydisk in Cn. The proofs of these results use some restrictive assumptions, which in the case of one complex variable are automatically satisfied.

关键词： Fekete-Szego problem quasi-convex mappings of type A quasi-convex mappings of type B quasi-convex mappings of type C

Selective enriching of trionic emission in a WS-ZnO hybrid through type-II band alignment

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Science China(Information Sciences) 2023年

作者： Jin Feng LEONG Kim Yong LIM Xiao WU qinghua xu Chorng Haur SOW Eng Tuan POH Department of Chemistry National University of Singapore Department of Physics National University of Singapore

Strategies to modulate the exciton dynamics in ultrathin two-dimensional(2D) semiconductors have always been an integral component in the bid towards improved optoelectronics and quantum photonic devices. The capability to non-destructively tune the relaxation dynamics, valley polarization, binding energies, and population ratio of various excitonic species has been well-sought for advanced applications.Through the rationale design of a WS2-ZnO hybrid platform, we present a distinct increment in the trion-toexciton ratio for WS2emission across a patterned heterostructure. The shift in dominant excitonic species arose due to the efficient charge segregation at the spatially confined interface of the type-II heterostructure.Owing to the charge transfer process, the resultant emission profile presents up to four times amplification in the trion-to-exciton ratio, with temperature variable trion binding energies up to 59 meV. Since trions possess non-zero charge and spin degrees of freedom, the provision of a higher density of trions with increased binding stability would encourage new opportunities for reproducible optoelectronics and quantum emitters.

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Study of Linear and Nonlinear Optical Properties of Four Derivatives of Substituted Aryl Hydrazones of 1,8-Naphthalimide

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Chinese Journal of Chemistry 2014年第3期32卷 205-211页

作者： Peiyang Gu xufeng xu Feng Zhou Tingting Zhao Gaojie Ye Gaoyan Liu qinghua xu Jianfeng Ge Qingfeng xu Jianmei Lu Department of Polymer Science College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhouJiangsu 215123China Department of Chemistry National University of Singapore3 Science Drive 3117543Singapore

Four 1,8-naphthalimide hydrazone molecules with different electron-donating groups have been applied in the study of linear and nonlinear optical(NLO)properties.These compounds showed strong green emission in solution.Their NLO properties such as two-photon absorption(TPA)behavior with femtosecond laser pulses ca.800 nm and excited-state absorption(ESA)behavior with nanosecond laser pulses at 532 nm were investigated.Compound 4 presented the largest two-photon cross section(550 GM)among them due to two factors:the conjugated length of compound 4 is the longest and the electron-donating ability of compound 4 is the strongest.Different from TPA behavior,compound 2 showed the best nonlinear absorption properties at 532 nm and its nonlinear absorption coef-ficient and third-order nonlinear optical susceptibilitiesχ^(3)were up to 1.41×10^(−10) MKS and 4.65×10^(−12) esu,re-spectively.Through the modification of the structure,the nonlinear optical properties of these compounds at differ-ent wavelengths(532 and 800 nm)were well tuned.The great broad-band nonlinear optical properties indicate hy-drazones are good candidates for organic nonlinear optical absorption materials.

关键词： excited-state absorption(ESA) fluorescence naphthalimide nonlinear optical(NLO) two-photon absorption(TPA)