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Color coded metadevices toward programmed terahertz switching

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Light(Science & Applications) 2024年第7期13卷 1383-1392页

作者： Weibao He Xiang’ai cheng Siyang Hu Ziheng Ren Zhongyi Yu Shun wan Yuze Hu Tian Jiang College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangshaChina. Nanhu Laser Laboratory National University of Defense TechnologyChangshaChina. Hunan Provincial Key Laboratory of High Energy Laser Technology National University of Defense TechnologyChangshaChina. Institute for Quantum Science and Technology College of ScienceNational University of Defense TechnologyChangshaChina

Terahertz modulators play a critical role in high-speed wireless communication,non-destructive imaging,and so on,which have attracted a large amount of research ***,all-optical terahertz modulation,an ultrafast dynamical control approach,remains to be limited in terms of encoding and *** we experimentally demonstrated an optical-programmed terahertz switching realized by combining optical metasurfaces with the terahertz metasurface,resulting in 2-bit dual-channel terahertz *** terahertz metasurface,made up of semiconductor islands and artificial microstructures,enables effective all-optical programming by providing multiple frequency channels with ultrafast modulation at the nanosecond ***,optical metasurfaces covered in terahertz metasurface alter the spatial light field distribution to obtain color *** to the time-domain coupled mode theory analysis,the energy dissipation modes in terahertz metasurface can be independently controlled by color excitation,which explains the principle of 2-bit encoding *** work establishes a platform for all-optical programmed terahertz metadevices and may further advance the application of composite metasurface in terahertz manipulation.

关键词： terahertz surface excitation

Preparation and properties of Ti_(3)SiC(2) -based corrosion mitigation coatings for SiC_(f) /SiC PWR accident tolerant fuel cladding

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Journal of Advanced Ceramics 2024年第1期13卷 73-85页

作者： Jinsong yang Fang Ye Laifei cheng Kai Zhao Yucong Wei Science and Technology on Thermostructural Composite Materials Laboratory Northwestern Polytechnical UniversityXi’an 710072China

To enhance the resistance of SiC_(f)/SiC to hydrothermal corrosion in the pressurized water reactor(PWR)environment,structurally tunable Ti_(3)SiC(2)-based corrosion mitigation coatings for SiC_(f)/SiC were prepared using molten salt *** influence of various process parameters,such as Si/Ti molar ratio in raw materials,annealing time,and annealing temperature,on the phase composition and the structure of the coatings was *** the process control,the fabricated coatings can be either Ti_(3)SiC(2) monolithic structure or TiC/Ti_(3)SiC(2) and TiC/Ti_(3)SiC(2)/Ti_(5)Si_(3)C_(x) multilayered *** coatings demonstrate strong bonding to the substrate due to in-situ reaction,exhibiting tensile and shear strength of at least 26.9 and 30.8 MPa,*** TiC as a transition layer further enhances the tensile and shear strength to 41.3 and 51.4 MPa,*** Ti_(3)SiC(2) coatings enhance the thermal conductivity of SiC_(f)/SiC by 10%–12%.Notably,Ti_(3)SiC(2) coatings effectively protect SiC_(f)/SiC from hydrothermal corrosion,demonstrating an 83%strength retention rate compared to 71%in the control group after ***,the Ti5Si3Cx layer exhibits unsatisfactory corrosion *** Ti_(3)SiC(2) monolithic coating has higher thermal conductivity,TiC/Ti_(3)SiC(2) multi-layered coating has higher bonding strength,and both have desirable resistance to the hydrothermal corrosion.

关键词： Ti_(3)SiC(2) SiC_(f)/SiC nuclear materials hydrothermal corrosion coating

Emerging role of regulated cell death in intestinal failure-associated liver disease

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Hepatobiliary & Pancreatic Diseases International 2024年第3期23卷 228-233页

作者： Si-yang cheng Lu Jiang Ying wang Wei Cai Department of Pediatric Surgery Xinhua HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200092China Shanghai Key Laboratory of Pediatric Gastroenterology and Nutrition Shanghai 200092China Shanghai Institute for Pediatric Research Shanghai 200092China Division of Pediatric Gastroenterology and Nutrition Xinhua HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200092China

Intestinal failure-associated liver disease(IFALD)is a common complication of long-term parenteral nutrition that is associated with significant morbidity and *** is mainly characterized by cholestasis in children and steatohepatitis in ***,there is no effective approach to prevent or reverse the *** cell death(RCD)represents a fundamental biological paradigm that determines the outcome of a variety of liver *** cell death is reclassified into several types,based on the mechanisms and morphological *** evidence has linked different modes of RCD,such as apoptosis,necroptosis,ferroptosis,and pyroptosis to the pathogenesis of liver *** studies have shown that different modes of RCD are present in animal models and patients with *** the pathogenic roles of cell death may help uncover the underlying mechanisms and develop novel therapeutic strategies in *** this review,we discuss the current knowledge on how RCD may link to the pathogenesis of *** highlight examples of cell death-targeted interventions aiming to attenuate the disease,and provide perspectives for future basic and translational research in the field.

关键词： Parenteral nutrition Apoptosis Necroptosis Cholestasis Steatosis

Integration of morphology and electronic structure modulation on cobalt phosphide nanosheets to boost photocatalytic hydrogen evolution from ammonia borane hydrolysis

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Green Energy & Environment 2024年第2期9卷 333-343页

作者： Chao wan Yu Liang Liu Zhou Jindou Huang Jiapei wang Fengqiu Chen Xiaoli Zhan Dang-guo cheng School of Chemistry and Chemical Engineering Anhui Province Key Laboratory of Coal Clean Conversion and High Valued UtilizationAnhui University of TechnologyMa'anshan243002China College of Chemical and Biological Engineering Zhejiang UniversityZhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology38 Zheda RoadHangzhou310027China Key Laboratory of New Energy and Rare Earth Resource Utilization of State Ethnic Affairs Commission Key Laboratory of Photosensitive Materials&Devices of Liaoning ProvinceSchool of Physics and Materials EngineeringDalian Nationalities University 18 Liaohe West RoadDalian116600China Institute of Zhejiang University-Quzhou 78 Jiuhua Boulevard NorthQuzhou324000China Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology Changzhou University213164China

The controllable and safe hydrogen storage technologies are widely recognized as the main bottleneck for the accomplishment of sustainable hydrogen *** borane(AB)has regarded as a competitive candidate for chemical hydrogen ***,developing efficient yet high-performance catalysts towards hydrogen evolution from AB hydrolysis remains an enormous ***,cobalt phosphide nanosheets are synthesized by a facile salt-assisted along with low-temperature phosphidation strategy for simultaneously modulating its morphology and electronic structure,and function as hydrogen evolution ***,the Co_(2)P nanosheets display extraordinary performance with a record high turnover frequency of 44.9 min^(-1),outperforming most of the noble-metal-free catalysts reported to *** remarkable performance is attributed to its desired nanosheets structure,featuring with high specific surface area,abundant exposed active sites,and short charge diffusion *** findings provide a novel strategy for regulating metal phosphides with desired phase structure and morphology for energy-related applications and beyond.

关键词： Ammonia borane Hydrogen generation Hydrolysis Cobalt phosphide nanosheets Photocatalysis

Two-way shape memory effect in a Ti-Zr-Nb-Ta high-temperature shape memory alloy

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Rare Metals 2024年第3期43卷 1257-1262页

作者： cheng-yang Xiong Tuo Li Jun wang Yan Li School of Materials Science and Engineering Beihang UniversityBeijing100191China

The two-way shape memory effect in a Ti-18.5Zr-10Nb-3.5Ta high-temperature shape memory alloy was investigated.X-ray diffraction measurem ent shows that the alloy is composed of orthorhombicα"-martensite.ωphase is not found in Ti-18.5Zr-10Nb-3.5Ta alloy due to the suppressing effect of Ta ***α"-martensite laths are found in the transmission electron microscope observation;after the bending deformation,there appear a lot of *** alloy exhibits a shape memory strain of 3.8%aud a high reverse martensite transformation start temperature of 464 *** maximum two-way shape memory strain of 1.2%is obtained in the alloy with the prebending training strain of 10%.The mechanism can be ascribed to the effect of internal stress field caused by dislocations.

关键词： Ti-Zr Shape memory alloys Two-way shape memory effect

Pd(I)-catalyzed ring-opening arylation of cyclopropyl-α-aminoamides:Access toα-ketoamide peptidomimetics

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Chinese Chemical Letters 2024年第6期35卷 320-326页

作者： Yue Sun Liming yang Yaohang cheng Guanghui An Guangming Li School of Chemistry and Materials Science Heilongjiang UniversityHarbin 150080China

We report the unprecedent Pd(I)catalyzed ring-opening arylation of cyclopropyl-α-*** protocol allows facile access to biologically important α-ketoamide-containing oligopeptides and even more challenging peptide-natural product *** selectivity was achieved by introduction of special unnatural amino acids,which also meets the requisite of bioorthogonal *** investigations reveals a distinct domino radical ring-opening process through Pd(I)catalysis.

关键词： Pd(I)catalysis Ring-opening arylation Domino reactions Oligopeptides Late-stage functionalization

Engineered microorganisms:A new direction in kidney stone prevention and treatment

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Synthetic and Systems Biotechnology 2024年第2期9卷 294-303页

作者： Wenlong wan Weisong Wu Yirixiatijiang Amier Xianmiao Li Junyi yang Yisheng Huang yang Xun Xiao Yu Department of Urology Tongji Hospital of Tongji Medical College of Huazhong University of Science and TechnologyWuhanHubei ProvinceChina

Numerous studies have shown that intestinal and urinary tract flora are closely related to the formation of kidney *** removal of probiotics represented by lactic acid bacteria and the colonization of pathogenic bacteria can directly or indirectly promote the occurrence of kidney ***,currently existing natural probiotics have *** biology is an emerging discipline in which cells or living organisms are genetically designed and modified to have biological functions that meet human needs,or even create new biological systems,and has now become a research hotspot in various *** synthetic biology approaches of microbial engineering and biological redesign to enable probiotic bacteria to acquire new phenotypes or heterologous protein expression capabilities is an important part of synthetic biology *** biology modification of microorganisms in the gut and urinary tract can effectively inhibit the development of kidney stones by a range of means,including direct degradation of metabolites that promote stone production or indirect regulation of flora *** article reviews the research status of engineered microorganisms in the prevention and treatment of kidney stones,to provide a new and effective idea for the prevention and treatment of kidney stones.

关键词： Renal calculi Engineered microorganisms Synthetic biology Colony homeostasis Oxalate metabolism

Emission and optical characteristics of brown carbon in size-segregated particles from three types of Chinese ships

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Journal of Environmental Sciences 2024年第8期142卷 248-258页

作者： Fengqin yang Fan Zhang Zeyu Liu Yingjun Chen Yan Zhang Can Wu Yali Lei Shijie Liu Binyu Xiao Xinyi wan Yubao Chen Yong Han Min Cui cheng Huang Gehui wang Key Lab of Geographic Information Science of the Ministry of Education School of Geographic SciencesEast China Normal UniversityShanghai 200241China Institute of Eco-Chongming 20 Cuiniao Rd.ChongmingShanghai 202150China State Environmental Protection Key Laboratory of Formation and Prevention of the Urban Air Pollution Complex Shanghai Academy of Environmental SciencesShanghai 200233China Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3) Department of Environmental Science and EngineeringFudan UniversityShanghai 200438China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Department of Civil and Environmental Engineering and State Key Laboratory of Marine Pollution The Hong Kong Polytechnic UniversityKowloon 100872Hong KongChina College of Environmental Science and Engineering Yangzhou UniversityYangzhou 225009China

Brown carbon(BrC)is one of the important light absorption substances that have high light absorption ability under short wavelength ***,limit studies have focused on the BrC emission from *** this study,size-segregated particulate matters(PM)were collected from three different types of ships,light absorption characteristics and size distribution of methanol-soluble BrC and water-soluble BrC in PM from ship exhausts were *** showed that four-stroke low-power diesel fishing boat(4-LDF)had the highest mass concentrations of methanol-soluble organic carbon(MSOC)and water-soluble organic carbon(WSOC),followed by 2-stroke high-power heavy-fuel-oil vessel(2-HHV),and fourstroke high-power marine-diesel vessel(4-HMV).While 2-HHV had obviously higher light absorption coefficients of methanol-soluble BrC(Abs365,M)and water-soluble BrC(Abs365,W)in unit weight of PM than the other two types of *** tested ships presented comparable or higher absorption efficiency of BrC in water extracts(MAE365,W)compared with other BrC emission *** of BrC was concentrated in fine particles,and the particle size distributions of both Abs365,Mand Abs365,Wshowed bimodal patterns,peaking at0.43–0.65μm and 4.7–5.8μm,***,different particle size distributions were found for MAE365,Mbetween diesel and heavy fuel oil ***,different wavelength dependence in particles with different size were also *** exhaust could be confirmed as a non-ignorable BrC emission source,and complex influencing factor could affect the light absorption characteristics of ship *** size should also be considered when light absorption ability of BrC was evaluated.

关键词： Ship emission Brown carbon Light absorption Size distribution

Construction of cytomegalovirus promoter-driven gene expression system in Laodelphax striatellus

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Insect Science 2024年第3期31卷 720-732页

作者： Xiaohui cheng wan Zhao Guohua Liang Hong Lu Yumei Fu Yiming Li Feng Cui State Key Laboratory of Integrated Management of Pest Insects and Rodents Insttute of ZoologyChinese Academy of SciencesBejingChina University of Chinese Academy of Sciences BejingChina School of Life Sciences Hebei UniversityBaodingHebei China Key Laboratory of Animal Ecology and Conservation Biology Institute of ZoologyChinese Academy of SciencesBejingChina Institute of Wetland Ecology&Clone Ecologyl Zhejiang Provincial Key Laboratory of Plant Evolutionary Ecology and Conservation Taizhou UniversityTaizhouZhejiangChina

The small brown planthopper(SBPH,Laodelphax striatellus)is a significant rice pest,responsible for transmitting rice stripe virus(RSV)in a persistent and propagative *** is one of the most detrimental rice viruses,causing rice stripe disease,which results in considerable loss of rice grain *** RNA interference and gene knockout techniques have enabled gene downregulation in SBPH,no system currently exists for the overexpression of endogenous or exogenous ***,the development of a protein expression system for SBPH is imperative to serve as a technical foundation for pest control and gene function *** study aimed to construct an expression vector using the promoter of the constitutive-expressed tubulin gene of SBPH,and promoter of human cytomegalovirus(CMV).Fluorescence experiments demonstrated that both tubulin and CMV promoter could drive green fluorescent protein(GFP)expression in SBPH,and could also facilitate the expression of a nucleocapsid protein(NP)-GFP fusion protein containing viral NP with comparable *** expression vector optimization,we have identified that the 3 tandem CMV promoters display a significantly higher promoter activity compared with both the 2 tandem CMV promoters and the single CMV *** addition,the incorporation of Star polycation nanoparticles significantly enhanced the expression efficiency in *** results provide a promising technical platform for investigating gene functions in SBPH.

关键词： cytomegalovirus promoter gene expression system nanoparticle small brown planthopper