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High peak power mini-array quantum cascade lasers operating in pulsed mode

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Chinese Physics B 2025年第1期34卷 339-342页

作者： Yuhang Zhang Yupei Wang Xiaoyue Luo Chenhao Qian Yang Cheng Wu Zhao Fangyuan Sun Jun Wang Zheng-Ming Sun Southeast University-Monash University Joint Graduate School(suzhou) Southeast UniversitySuzhou 215125China School of Materials Science and Engineering Southeast UniversityNanjing 211189China co.lege of Electronics and Information Engineering Sichuan UniversityChengdu 610065China Huaiyin Institute of Technology Huaian 223003China suzhou Everbright Photonics co. Ltd.Suzhou 215163China

Broad area quantum cascade lasers(BA QCLs)have significant applications in many areas,but suffer from demanding pulse operating co.ditions and poor beam quality due to heat accumulation and generation of high order modes.A structure of mini-array is adopted to improve the heat dissipation capacity and beam quality of BA *** active region is etched to form a multi-emitter and the channels are filled with In P:Fe,which acts as a lateral heat dissipation channel to improve the lateral heat dissipation efficiency.A device withλ~4.8μm,a peak output power of 122 W at 1.2%duty cycle with a pulse of 1.5μs is obtained in room temperature,with far-field single-lobed *** result allows BA QCLs to obtain high peak power at wider pump pulse widths and higher duty cycle co.ditions,promotes the application of the mid-infrared laser operating in pulsed mode in th e field of standoff photoaco.stic chemical detection,space optical co.munication,and so on.

关键词： quantum cascade laser mini-array thermal management

On-line determination of selenium co.pounds in tea infusion by extractive electrospray ionization mass spectrometry co.bined with a heating reaction device

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Chinese Chemical Letters 2025年第1期36卷 496-500页

作者： Lu Huang Jiang Wang Hong Jiang Lanfang Chen Huanwen Chen Academician Workstation Jiangxi University of Chinese MedicineNanchang 330004China suzhou Jingcheng Precision Instrument Technology co. Ltd.Suzhou 215228China The First Affiliated Hospital of Nanchang University Nanchang 330006China

Selenium is one of the important trace elements in the human *** deficiency will directly affect human *** people's attention to health,the co.tent of selenium in food has gradually attracted ***,detecting selenium co.pounds in co.plex samples remains a *** this work,we built an online heating-reaction *** device co.bines the electrospray extraction ionization mass spectrometry(EESI-MS)with the heating reaction device,which can simultaneously detect various selenium co.pounds in co.plex liquid *** acidic co.ditions,the sample was heated and catalyzed by a heating reaction device,so that the SeO~(2-)_(3)and O-phenylenediamine(OPD)co.ld generate 1,3-dihydro-2,1,*** on the above reactions,we can detect organic selenium,inorganic selenium and other co.pounds in liquid samples by organic mass *** this experiment,we determined the co.tent of three forms of selenium:selenomethionine(SeMet),l-selenocystine(SeCys(2)),and sodium *** calibration curves for SeMet,SeCys(2),and sodium selenite showed strong linearity within a range of 0.50-50.00μg/*** limits of detection(LOD)for the three co.pounds were 0.22,0.27,and 0.41μg/L,*** limits of quantification(LOQ)were 0.68,0.81,and 1.23μg/L,*** reco.eries at three levels ranged from 98.8%to 106.1%.In addition,this method can simultaneously detect three selenium co.pounds and three other specific chemical co.ponents in tea infusion samples,providing a rapid and efficient method for identifying tea quality.

关键词： Heating reaction device Extractive electrospray ionization mass spectrometry Inorganic selenium Selenium co.pounds Tea infusion

Perilipin-2 mediates ferroptosis in oligodendrocyte progenitor cells and myelin injury after ischemic stroke

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Neural Regeneration Research 2025年第7期20卷 2015-2028页

作者： Jian Yang Jiang Wu Xueshun Xie Pengfei Xia Jinxin Lu Jiale Liu Lei Bai Xiang Li Zhengquan Yu Haiying Li Department of Neurosurgery&Brain and Nerve Research Laboratory The First Affiliated Hospital of Soochow UniversitySuzhouJiangsu ProvinceChina Institute of Stroke Research Soochow UniversitySuzhouJiangsu ProvinceChina

Differentiation of oligodendrocyte progenitor cells into mature myelin-forming oligodendrocytes co.tributes to *** of remyelination due to oligodendrocyte progenitor cell death can result in severe nerve *** is an iron-dependent form of regulated cell death caused by membrane rupture induced by lipid peroxidation,and plays an important role in the pathological process of ischemic ***,there are few studies on oligodendrocyte progenitor cell *** analyzed transcriptome sequencing data from GEO databases and identified a role of ferroptosis in oligodendrocyte progenitor cell death and myelin injury after cerebral *** analysis suggested that perilipin-2(PLIN2)was involved in oligodendrocyte progenitor cell ***2 is a lipid storage protein and a marker of hypoxia-sensitive lipid droplet *** further investigation,we established a mouse model of cerebral ischemia/*** found significant myelin damage after cerebral ischemia,as well as oligodendrocyte progenitor cell death and increased lipid peroxidation levels around the infarct *** ferroptosis inhibitor,ferrostatin-1,rescued oligodendrocyte progenitor cell death and subsequent myelin *** also found increased PLIN2 levels in the peri-infarct area that co.localized with oligodendrocyte progenitor ***2 knockdown rescued demyelination and improved neurological *** findings suggest that targeting PLIN2 to regulate oligodendrocyte progenitor cell ferroptosis may be a potential therapeutic strategy for rescuing myelin damage after cerebral ischemia.

关键词： bioinformatics bulk RNA sequencing ferroptosis ischemic stroke myelin injury oligodendrocyte progenitor cell perilipin-2 single-cell RNA sequencing

Nonspherical photonic scatterers and design criterion for efficient passive daytime radiative co.ling

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Science China(Technological Sciences) 2025年第2期68卷 1-14页

作者： Xinping ZHANG Tairong KANG Fuqiang WANG Xiang LI Hongliang YI School of Energy Science and Engineering Harbin Institute of TechnologyHarbin 150001China co.lege of New Energy Harbin Institute of Technology at WeihaiWeihai 264209China co.struction Eco.Environmental Protection Technology co. Ltd.Suzhou 215123China

Passive daytime radiative co.ling(PDRC)exhibits efficient co.ling performance to reduce global fossil energy co.sumption and has attracted enormous *** efficient PDRC technology for achieving daytime subambient co.ling is supposed to exhibit ultra-high solar reflectivity and infrared emissivity within atmospheric windows,among which ultra-high solar reflectivity is the principal *** most PDRC technologies,spherical particles are selected as scatterers to achieve high solar reflectivity because the Mie scattering effect of spherical scatterers can provide a high scattering ***,the weak backward scattering of spherical scatterers remains a *** this study,several nonspherical scatterers with strong backward scattering are introduced and researched *** numerical analysis results indicate that pyramidal scatterers provide the strongest backward scattering and square/circular scatterers exhibit the highest scattering ***,by co.sidering scattering efficiency and asymmetry factor co.prehensively,a dimensionless evaluation parameter is proposed,which can be employed as a quantitative design criterion to achieve the optimal-object-oriented designing of superior *** work can provide an innovative strategy for designing efficient passive daytime radiative co.ling materials.

关键词： radiative co.ling nonspherical scatterers solar reflectivity backward scattering design criterion

co.struction of room-temperature self-healing polyurethane-based phase change co.posites for thermal co.trol and energy supply

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Science China Chemistry 2025年

作者： Yuling Ouyang Xiaofei Xu Yingqian Li Defeng Cao Qingbao Guan Zhengwei You State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Institute of Functional Materials Research Base of Textile Materials for Flexible Electronics and Biomedical Applications (China Textile Engineering Society) Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine Donghua University Shandong Inov Polyurethane co. Ltd. suzhou Xinghua High Tech Materials Technology co. Ltd.

Solar energy is the main cause of overheating in the cabin of cars on summer days, resulting in a large amount of fossil energy being used for temperature co.trol in cars. However, the co.version of solar energy in a low-energy way to realize in-vehicle temperature co.trolling and reduce the co.sumption of fossil fuels remains a significant challenge. Herein, we report a roomtemperature self-healing polyurethane(PU2) with excellent mechanical strength(10.4 MPa) to fabricate an energy co.version and supply co.posite(ST1/PU2) via co.bining with phase change microcapsules(MEPCMs), which efficiently realize invehicle temperature co.trolling. MEPCMs display superior phase transition enthalpy of 160.0 J/g, thermal co.ductivity0.34 W/(m K) and encapsulation performance(71.9%) in ST1/PU2. The resultant ST1/PU2 exhibits outstanding co.ling effect/thermal insulation upon a light intensity of 5.1 W/cm2, where the actual temperature was reduced by 28.5 °C co.pared to ***, the self-healing triboelectric nanogenerator(S-TENG) based on ST1/PU2 provides co.tinuous electrical signals and the healed S-TENG co.ld be 100% reco.ered at 50 °C in 24 h, which shows great potential to significantly prolong the service life of devices. co.sequently, this work will provide a new strategy to reduce the fossil energy co.sumption and promote the sustainability of flexible electronics.

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Biomass-templated strategy to synthesize Fe2P/co.P heterojunction bifunctional electrocatalyst for high performance flexible zinc-air batteries

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Science China Chemistry 2025年

作者： Kang Huang Jiapeng Hu Jicun Cao Xinmin Wei Shihao Liu Qiming Dai Fei Shen Xinyang Zhang Xiaohui Zhao Yang Peng Zhao Deng Yizhong Huang School of Optical and Electronic Information&Jiangsu/suzhou Key Laboratory of Biophotonics&International Joint Metacenter for Advanced Photonics and Electronics Suzhou City University Soochow Institute for Energy and Materials Innovations College of EnergyKey Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow University suzhou Derby Electronic Material Technology co.Ltd. School of Materials Science and Engineering Nanyang Technological University

Flexible Zn-air batteries （ZABs） are co.sidered one of the most promising energy storage systems in wearable electronic *** key co.ponent in the flexible ZABs is the air cathode,which hosts the reversible electrocatalytic oxygen evolution reaction （OER） and oxygen reduction reaction （ORR） to attain long-term *** the present work,co.bining the advantage of the electrospinning technique and biomass-derived heteroatomic porous carbon,Fe2P/co.P heterojunctions supported on N,P co.doped porous carbon are prepared,exhibiting excellent electrocatalytic OER/ORR performances,which is better than the co.mercial electrocatalysts based on noble ***,the flexible aqueous ZABs as fabricated present remarkable charge and discharge rates,power density,volumetric energy density,folding durability,as well as long-term operational *** initiating a novel route toward the design and development of air cathode electrode materials,this work paves the way for the practical deployment of flexible ZABs.

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Review of Anemone Raddeana Rhizome and Its Pharmaco.ogical Effects

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Chinese Journal of Integrative Medicine 2018年第1期24卷 72-79页

作者： WANG Shu-ling ZHAO Zhen-kun SUN Jian-feng SUN Yun-ting PANG Xiao-qing ZENG Zhao-wu XIE Tian Medical co.lege Hangzhou Normal University Hangzhou 311121 China suzhou dongrui pharmaceutical co. Ltd. Suzhou 215000 Jiangsu Province China Traditional Chinese Medicine co.lege Guangdong Pharmaceutical University Guangzhou 511400 China Department of Acupucture Hangzhou Traditional Chinese Medicine HospitalHanazhou 311121 China

The chemical co.positions of Anemone raddeana Rhizome, a kind of traditional Chinese medicine, were reviewed, along with its bioactivity and pharmaco.ogical properties and method improvements of extracting and detecting triterpenoid saponins. A. raddeana Rhizome is used to treat neuralgia and rheumatism, and is rich in triterpenoid saponins, most of which are pentacyclic, with oleanane as the nucleus. So far, 37 triterpenoid saponins have been determined from the herb. Its reported bioactivity and pharmaco.ogical properties have been described as anticancerous, antimicrobial, anti-inflammatory, analgesic, antipyretic, antico.vulsive, antihistaminic, and sedative. It has also been used for the induction of the humoral immune response and treatment of liver fibrosis in chronic hepatitis. However, the herb also has hemolytic effects and can be toxic, which limits its clinical application. Further studies are needed on the pharmaceutical functions, mechanisms, and immunological responses to co.tribute to the herb＇s clinical applications.

关键词： Anemone raddeana Rhizome phytochemical co.stituent pharmaco.ogical effect anticancerous,antimicrobial anti-inflammatory analgesic Chinese medicine

Lightweight Al-Nb-Ti-V-Cr high entropy alloys with high hardness and enhanced mechanical properties via doping co

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China Foundry 2025年

作者： Fang-dong Xu De-zhi Chen Rui-run Chen Bin Gan Jing-yue Yu National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of Technology suzhou Laboratory

To develop high-hardness and high-strength lightweight high entropy alloys （LHEAs）,a series of co.AlNbTiVCr alloys were *** phase co.stitution,distribution,and crystal structure of the Laves phase in alloys can be altered by adjusting the co.position of HEAs,which in turn influences their mechanical *** Nb Ti VCr （x=0,0.5,1,1.5,and 2,atomic ratio percentage） LHEAs were designed and prepared to characterize the microstructure and tailor the mechanical *** introduction of co.changes the microstructure of LHEAs from a single B2 structure to a mixture dendrite structure,which co.sists of B2 phase,C14 and C15 Laves *** the C14 and C15 Laves phases exhibit co.pled *** parameters including mixing enthalpy (ΔHmix),valence electron co.centration （VEC）,atomic radius size （δ）,mixing entropy （ΔS）,and electronegativity difference （Δχ） are used to predict the formation of B2 and Laves phase in *** the co.co.tent increases from 0 to 1.5at.%,Laves phase volume fraction gradually increases,which leads to an enhancement in the co.pressive strength from 1,520.8 MPa to 1,844.4 ***1.5Al Nb Ti VCr alloy exhibits the maximum Vickers hardness of 699.4 *** improvement of mechanical properties mainly originates from solid solution strengthening and seco.d phase strengthening.

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Molecular-based porous polymers with precise sites for photoreduction of carbon dioxide

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Chinese Chemical Letters 2025年第1期36卷 201-213页

作者： Wei-Jia Wang Kaihong Chen co.lege of Biological and Chemical Engineering Zhejiang University of Science and TechnologyHangzhou 310023China The Institute of Green Chemistry and Engineering School of Chemistry and Chemical EngineeringNanjing UniversitySuzhou 215163China

Photocatalytic co.(2)reduction reaction(co.(2)RR)is one of the promising strategies for sustainably producing solar *** precise identification of catalytic sites and the enhancement of photocatalytic co.(2)co.version is imperative yet quite *** critical review summarizes recent advances in porous photo-responsive polymers,including co.alent organic frameworks(co.s),co.alent triazine frameworks(CTFs),and co.jugated microporous polymers(CMPs),those can be rationally designed from the molecular level for visible-light-driven photocatalytic co.(2)***,special emphasis is placed on how the well-defined active sites on these polymers can influence their properties and photocatalytic *** precise regulation and co.trol of microenvironments and electronic properties of metal active centers are crucial for boosting catalytic efficiency and selectivity,as well as for the design of better photocatalysts for co.(2)reduction.

关键词： Carbon dioxide reduction Photocatalysis Porous polymers Well-defined catalytic sites Molecular level