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A fluorescent probe for ultra-wide range detection of SO 2 in food, traditional Chinese medicine, organisms and environment

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Talanta 2026年 296卷 128430页

作者： Jiaxing Li Xiaomei Yan Yiting Wang Tianruo Shen Mingyu Tian Tianyu Liang Lijun Tang Yang Li Keli Zhong College of Chemistry and Materials Engineering Bohai University Jinzhou 121013 China College of Laboratory Medicine Dalian Medical University Dalian 116044 China Science Mathematics and Technology Cluster Singapore University of Technology and Design 8 Somapah Road Singapore 487372 Singapore

Sulfur dioxide (SO 2 ) has long been recognized as a hazardous environmental pollutant, and excessive intake of SO 2 and its derivatives (HSO 3 − /SO 3 2− ) may be harmful to human health. A fluorescent probe capable of quantitative sulfite detection (0.755 μM − 500 μM), named RPB-R , was developed to exhibit chromogenic and red fluorescence turn-on responses. The probe demonstrates ultrafast detection kinetics (<5 s), low detection limit (0.755 μM), and broad concentration detection capability spanning three orders of magnitude, establishing its technical superiority for environmental monitoring and food detection applications. RPB-R is capable of easily and accurately determining the sulfite content of different real food products and traditional Chinese medicines, thus allowing judgments about the safety and compliance of these products. In particular, RPB-R was incorporated into agarose, PVA film and filter paper to serve as convenient, inexpensive and portable devices for rapid and visual detection of SO 2 gas. Furthermore, RPB-R was successfully used for monitoring and imaging sulfites in MCF-7 cells with a high contrast ratio.

关键词： Cell imaging Chinese medicines Food samples Materials SO(2) derivatives

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Significance of Stable Isotopic Composition of Dissolved Inorganic Carbon in the Marginal Seas of China

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SSRN 2022年

作者： Duan, Xiaoyong He, Xingliang Chen, Bin Gao, Fei Cao, Ke Lv, Shenghua Tian, Yuan Kong, Xianghuai Yin, Ping Yang, Lei Xie, Yongqing Qingdao Institute of Marine Geology China Geological Survey Qingdao266071 China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and Technology Qingdao266071 China Donghai Laboratory Zhejiang Zhoushan316021 China Zhejiang Institute of Marine Geology Survey Zhejiang Zhoushan316021 China Zhejiang Engineering Survey and Design Institute Group CO. LTD Zhejiang Ningbo315012 China

There are still many controversies and uncertainties about the role of marginal seas as a source or sink of the global ocean carbon cycle. In May 2019, samples were collected from the surface, 20m, and bottom layers of the Yellow Sea (YS) and the East China Sea (ECS) to detect stable isotopes (δ13C) of dissolved inorganic carbon (DIC). The δ13CDIC ranges from -2.911‰ to -0.416‰ and are significantly more negative than in the oceans because the influence of terrestrial inputs on the marginal seas. The vertical trend of δ13CDIC in the YS is consistent with that in the open oceans, showing a trend of gradual decrease from the surface to the bottom, which is probably a carbon sink. However, in the inner shelf of the ECS, the variation with depth is not obvious, and the samples corresponding to the lowest value are from the coastal region. During this season, the freshwater transported by the Yangtze River mainly migrates east rather than south. Therefore, it is not the riverine input that leads to the weak depth variation and low isotope values. The results of nearshore fixed station monitoring indicate that the cause of this phenomenon is more likely to be submarine groundwater discharge. Submarine groundwater discharge may have a great influence on the carbon cycle of the global shelf sea. © 2022, The Authors. All rights reserved.

关键词： Isotopes

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The Forming of Amorphous Alloy Parts: a Technological Review

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Cailiao Daobao/Materials Reports 2020年第2期34卷 03133-03141页

作者： Ding, Huaping Gong, Pan Yao, Kefu Deng, Lei Jin, Junsong Wang, Xinyun State Key Laboratory of Material Processing and Die and Mould Technology Huazhong University of Science and Technology Wuhan430074 China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan University Changsha410082 China School of Materials Science and Engineering Tsinghua University Beijing100084 China

As a new class of materials with excellent properties and different structure compared to traditional crystal metals, amorphous alloys have been attracting great interest from condensed matter physicists and materials scientists. In recent decades, the basic theoretical research and preparation technology of amorphous alloys have made great progress. Amorphous alloys, which posses wide application prospects as structural materials and functional materials, are gradually moving from laboratory to commercial applications and promoting the development of science and technology. To realize the commercial application of a new material, it is necessary to have high productivity and low-cost manufacturing technology of parts. However, as the preparation of amorphous alloys requires rapid cooling rate, high vacuum, high purity raw materials, the cost is relatively high. Moreover, the high strength and high brittleness at room temperature make the amorphous alloys difficult to be machined, while crystallization is easy to occur during the thermoplastic forming process. In brief, it is still difficult to fabricate amorphous alloy parts with large size and complex shape, which seriously restricts the wide application of amorphous alloys. Thus, it has become an important subject for scholars to develop the novel part forming technologies according to the characteristics of amorphous alloy. With the appearance of alloy system with strong amorphous forming ability, the forming technology of amorphous alloy parts has also been greatly developed. At present, the forming technology of amorphous alloys mainly includes casting forming, thermoplastic forming, welding, powder sintering, additive manufacturing technology, etc. The size limit of the formed part spans from nanometer to centimeter, and the complexity, preparation and forming efficiency are also greatly improved. However, each forming technology has some limitations in forming efficiency, size, performance and cost, which ma

关键词： 3D printers

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4D-printed novel zero Poisson's ratio honeycombs based on thermoplastic polymers: Thermo-mechanical experiments and modeling

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Thin-Walled Structures 2025年 215卷

作者： Zhang, Boyu Gu, Jianping Pan, Wencheng Huang, Jian Sun, Huiyu State Key Laboratory of Mechanics and Control for Aerospace Structures Nanjing University of Aeronautics and Astronautics Nanjing China Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology School of Materials Science and Engineering Nanjing Institute of Technology Nanjing China Nanjing Fiberglass Research and Design Institute Co. Ltd. Nanjing China

In this study, a novel zero Poisson's ratio (ZPR) honeycomb is proposed by reconfiguring the inclined and vertical walls of re-entrant structure. A theoretical model based on energy theorems for the honeycomb is established to analyze the in-plane mechanical properties. By analyzing the process parameters related to 4D printing, the accuracy correction coefficient related to the nozzle diameter is proposed. The modified theoretical model can better predict the in-plane mechanical properties of the structure under small deformation. Based on the model, the dimensional parameter analysis of the structure is carried out. It is shown that there is a great range to adjust the mechanical properties of the honeycombs. At the same time, compared with the conventional ZPR honeycombs, the structure can improve the in-plane shear modulus without sacrificing the deformation capacity. In addition, 4D printing technology enables structures to be programmed to adjust its mechanical properties by controlling the temperature, and also has the ability to return to its original shape autonomously after thermal stimulation. Moreover, the thermo-mechanical and smart responses of the honeycomb are investigated by experiments and finite element analysis. Finally, the stability of the structure is proved by multiple shape memory cycle tests. The study of the 4D-printed ZPR honeycomb in this paper provides foundation for the application in various engineering areas such as self-deployable structures, soft robots, and flexible electronics. © 2025 Elsevier Ltd

关键词： Honeycomb structures

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Tension Characteristics Analysis of Scraper Chain of Heavy-Duty Scraper Conveyor with Time-Varying Loads

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Shock and Vibration 2024年第1期2024卷

作者： Shuai Li Zhencai Zhu Hao Lu Yujun Xue School of Mechatronics Engineering Henan University of Science and Technology Luoyang 471003 China *** Henan Key Laboratory for Machinery Design and Transmission System Luoyang 471003 China Collaborative Innovation Center of Henan Province for High-End Bearing Henan University of Science and Technology Luoyang 471000 China *** Longmen Laboratory Luoyang 471000 China School of Mechatronics Engineering Jiangsu Key Laboratory of Mine Mechanical and Electrical Equipment China University of Mining and Technology Xuzhou 221116 Jiangsu China ***

With the intensification and large scale of coal mining, scraper conveyors are developing towards high power, large volume, long haul distance, and high reliability. It is more and more important to obtain the dynamic tension of the scraper chain with time-varying loads. The purpose of this paper is to obtain the dynamic tension of scraper chains of the scraper conveyor with time-varying loads. First, according to the structural characteristics and working environment of the scraper conveyor and the polygon effect of the sprocket, the scraper conveyor dynamic model under the action of the time-varying loads is established by the finite unit method. Second, the load variation rule of the bearing section is explored when the scraper conveyor and shearer work together. Furthermore, the element resistance of each discrete element, the stiffness coefficient of the scraper chain, and the influence of polygonal effect of sprocket wheel are analyzed. And then, the dynamic tension of the scraper chain is obtained by the Hilber–Hughes–Taylor (HHT) method. Finally, the validity of the scraper conveyor dynamic model is verified by the example analysis and field measurement experiment. Due to the influence of heavy starting, the maximum tension of the scraper chain during the starting process is 751.6 kN, which is 12.25% higher than the tension with smooth running (669.6 kN). During the startup stage, significant impacts occur on both motors and scraper chains which may lead to damage. To protect these components effectively, control strategies such as “soft start” or no-load start hold crucial engineering significance in achieving reliable operation of the scraper conveyor. The obtained results can provide a theoretical basis for the reliability evaluation and parameter optimization of the scraper conveyor.

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Nonstationary Regional Extreme Flood Events Spatio-Temporal Evolution Informed by Climate-Based Clustering Using Hierarchical Bayesian Modeling

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SSRN 2024年

作者： Zeng, Hang Zhou, Yang Liu, Pei Huang, Jiaqi Zhou, Hui Yu, Weihou School of Hydraulic and Environmental Engineering Changsha University of Science & Technology Changsha410114 China Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province Changsha410114 China Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province Changsha410114 China Power China Zhongnan Engineering Corporation Limited Changsha410014 China Yueyang Institute of Water Resources and Hydropower Survey Planning and Design Corporation Limited Yueyang414000 China Hydrology and Water Resources Survey Center of Hunan Province Changsha410008 China

There exists increasing evidence that large-scale climate indices are being linked to extreme flood risk in many regions. It is widely recognized that identifying the response of flood to temporal variabilities of climate factors is investigated by nonstationary local hydrological frequency (NLFFA) analysis. However, high uncertainty by using NLFFA usually cannot achieve the accuracy for engineering design, creating need for nonstationary regional flood frequency analysis (NRFFA) for reducing uncertainty. This study presents a NRFFA of flood extremes in Xiangjiang river basin in South-Central, China that is conditioned on the large-scale climate index. The nonstationary regional analysis is developed in a hierarchical Bayesian framework to support partial and full pooling, which can enhance climate-based regionalization skill as well as retain site-specific characteristics. Simultaneously, the modeling structure is designed to consider the spatial dependence across the region and utilized for extreme flood risk estimation. Results from regional models for whole basin and climatically homogeneous sub-region respectively, and local models are compared: the regional models exhibits a great benefit with the estimates uncertainty reduction and allows a better quantification of large-scale climate effect on annual maximum flood peak. Moreover, the regional partial pooling model for homogeneous sub-region with the smallest Deviance Information Criterion value indicate that the regional model can be further improved by considering a prior pooling stations formed by similar significant climate response. © 2024, The Authors. All rights reserved.

关键词： Floods

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Exploring Spatial Hybrid User Interface for Visual Sensemaking

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IEEE Transactions on Visualization and Computer Graphics 2025年 PP卷 PP页

作者： Tong, Wai Li, Haobo Xia, Meng Kam-Kwai, Wong Pong, Ting-Chuen Qu, Huamin Yang, Yalong Nanchang University School of Mathematics and Computer Sciences Nanchang 330031 China Shenzhen University School of Architecture & Urban Planning Shenzhen 518060 China University of Calgary Department of Geomatics Engineering Calgary T2N 1N4 Canada Wuhan University School of Geodesy and Geomatics Wuhan 430079 China Wuhan University State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan 430079 China Finnish Geospatial Research Institute Department of Remote Sensing and Photogrammetry Masala 02430 Finland Wuhan University of Technology School of Safety Science and Emergency Management Wuhan 430079 China Nanjing University of Information Science & Technology School of Remote Sensing & Geomatics Engineering Nanjing 210000 China Nanjing Forestry University College of Civil Engineering Nanjing 210037 China Guangzhou Urban Planning & Design Survey Research Institute Guangzhou 51100 China

We built a spatial hybrid system that combines a personal computer (PC) and virtual reality (VR) for visual sensemaking, addressing limitations in both environments. Although VR offers immense potential for interactive data visualization (e.g., large display space and spatial navigation), it can also present challenges such as imprecise interactions and user fatigue. At the same time, a PC offers precise and familiar interactions but has limited display space and interaction modality. Therefore, we iteratively designed a spatial hybrid system (PC+VR) to complement these two environments by enabling seamless switching between PC and VR environments. To evaluate the system's effectiveness and user experience, we compared it to using a single computing environment (i.e., PC-only and VR-only). Our study results (N=18) showed that spatial PC+VR could combine the benefits of both devices to outperform user preference for VR-only without a negative impact on performance from device switching overhead. Finally, we discussed future design implications. © 1995-2012 IEEE.

关键词： Data visualization

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Dysplasia of male organs induces apomixis in Malus crabapples

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Ornamental Plant Research 2021年第1期1卷 98-113页

作者： Yujing Hu Yanfen Lu Linke Chao Zhen Wang Yufen Bu Jie Zhang Wenhe Wang Yuncong Yao Beijing Advanced Innovation Center for Tree Breeding by Molecular Design Beijing University of AgricultureBeijing 102206China Plant Science and Technology College Beijing University of AgricultureBeijing 102206China Beijing Key Laboratory for Agricultural Application and New Technique Beijing 102206China Beijing Nursery Engineering Research Centre for Fruit Crops Beijing 102206China College of Landscape Architecture Beijing University of AgricultureBeijing 102206China

Apomixis has high value in fruit crop propagation and breeding applications,particularly for the transgenerational fixation of *** this study,we found that flowers of the triploid Malus cultivar'Royalty'that were bagged after emasculation(EB)and pollinated with pollen from the diploid cultivar'Flame'(EFB)produced high fruit set and increased seed numbers per *** offspring exhibited superior growth vigour compared to those of the diploid sister cultivar'Flame'.The fruit setting rate for'Royalty'EFB was 98.44%,which was much higher than the fruit setting rate for'Royalty'BA(Bagging without emasculation)at 19.7%.The fruit setting rate for'Royalty'EB was 47.46%compared to 19.7%for'Royalty'***,offspring derived from either'Royalty'EB or EFB exhibited superior growth vigour compared to those of the diploid'Flame'.These results suggested that'Royalty'exhibits facultative apomixis and has strong sexual reproductive ability under the stimulation of foreign ***,'Royalty'anthers did not dehisce after flowering and had malformed pollen grains and a low pollen germination ***,we proposed that dysplasia of the male organ could be an important driver factor of apomixis in'Royalty'.Our study provides new insight into the mechanism of apomixis in Malus crabapples.

关键词： crab cultivar organs

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Simultaneously Strengthening and Toughening All-Natural Structural Materials via 3D Nanofiber Network Interfacial design

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Angewandte Chemie 2024年第48期136卷

作者： Dr. Huai-Bin Yang Xiang Zhao Quan Wang Yu-Hong Ruan Zhao-Xiang Liu Xin Yue Dr. Yin Bo Zhu Prof. Heng An Wu Dr. Qing-Fang Guan Prof. Shu-Hong Yu Department of Chemistry New Cornerstone Science Laboratory Institute of Biomimetic Materials & Chemistry Anhui Engineering Laboratory of Biomimetic Materials Division of Nanomaterials & Chemistry Hefei National Research Center for Physical Sciences at the Microscale. University of Science and Technology of China Hefei 230026 China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern Mechanics University of Science and Technology of China Hefei 230027 China Institute of Innovative Materials (I2 M) Department of Materials Science and Engineering Department of Chemistry Southern University of Science and Technology. Shenzhen 518055 China

Constructing structural materials from sustainable raw materials is considered an efficient way to reduce the potential threat posed by plastics. Nevertheless, challenges remain regarding combining excellent mechanical and thermal properties, especially the balance of strength and toughness. Here, we report a 3D nanofiber network interfacial design strategy to strengthen and toughen all-natural structural materials simultaneously. The introduced protonated chitosan at the interface between the surface oxidized 3D nanonetwork of bacterial cellulose forms the interfacial interlocking structure of nanonetworks, achieving a robust physical connection and providing enough physical contact sites for chemical crosslinking. The obtained sustainable structural material successfully integrates excellent mechanical and thermal properties on the nanoscale of cellulose nanofibers, such as light weight, high strength, and superior thermal expansion coefficient. The relationship between structural design and comprehensive mechanical property improvement is analyzed in detail, providing a universal perspective to design sustainable high-performance structural materials from nanoscale building blocks.

关键词： Interfacial design Nanonetwork Strength and toughness Bacterial cellulose Biodegradable

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High-performance electrodeposited wick design: from mechanism to fabrication, and applications in ultra-thin flat-plate heat pipes

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Applied Thermal Engineering 2025年 277卷

作者： Zhu, Yuefeng Song, Tianrui Xu, Hui Gao, Ying Shen, Yan Kan, Yibao Ma, Junjie Yang, Haiping Zhang, Hong Yang, Huiying School of Energy Science and Engineering Nanjing Tech University Nanjing 211816 China School of Mechanical and Power Engineering Jiangsu University of Science and Technology Zhenjiang 212100 China State Key Laboratory of Coal Combustion School of Energy and Power Engineering Huazhong University of Science and Technology Wuhan 430074 China Pillar of Engineering Product Development Singapore University of Technology and Design 487372 Singapore Nanjing Forestry University Nanjing 210037 China

With the rapid advancement of 5G communication, artificial intelligence, and high-performance computing technologies, microelectronic devices are evolving towards higher integration, miniaturization, and power density, making thermal management a critical bottleneck for performance enhancement. Ultra-thin flat plate heat pipes (UTFP-HPs), owing to their high-efficiency heat dissipation characteristics and ultra-thin structure, emerge as promising candidates for such applications. Based on the electrodeposition technology, this study innovatively designs wick structures under various electrodeposition parameters and applies them to UTFP-HPs, through experimental research on its performance and mechanism. The results demonstrate that the wicks with different parameters display favorable capillary performance. Specifically, CC-18-160 can climb to the top of 90 mm within 84 s, IC-24-160 can reach the top in 56 s, and interestingly, IC-22-180 after undergoing oxidation corrosion merely requires 46 s to ascend to the top. Then the wicks are used to fabricate UTFP-HPs with a thickness of 0.5 mm. After conducting experimental tests under a variety of heat dissipation conditions, it was discovered that the maximum heat transfer capacity is 9 W, the minimum thermal resistance is 0.544 °C/W, and the equivalent thermal conductivity is 9196 W/m·K, which provides new insights for dynamic thermal optimization in electronic devices. © 2025 Elsevier Ltd

关键词： Electrodeposition Heat transfer performance Ultra-thin flat-plate heat pipe Wicks

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