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The ecotoxicological effects of thiamethoxam on photosynthesis and nitrogen fixation in cyanobacteria: From inhibition to recovery

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Journal of Environmental sciences 2025年

作者： Jiale Zhang Shiye Zhu Xiyan Xu Youzheng Chai Jihai Shao Gen Lu Jianhua Zeng Ma Bai Anwei Chen College of Environment and Ecology Hunan Agricultural University Changsha 410128 China School of Chemistry and Chemical Engineering Beijing Institute of Technology Beijing 100081 China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China Institute of Resource Biology and Biotechnology Department of Biotechnology College of Life Science and Technology Huazhong University of Science and Technology Wuhan 430074 China School of Food Engineering Anhui Science and Technology University Fengyang AnHui 233100 China College of Chemistry & Pharmacy Northwest A&F University Yangling Shaanxi 712100 China

Thiamethoxam (THX) is a highly efficacious, broad-spectrum neonicotinoid insecticide that is prevalently detected in contemporary environmental settings. Although considerable research has been conducted on the adverse effects of THX on non-target organisms, there is a paucity of knowledge regarding its impact on nitrogen (N)-fixing cyanobacteria, which play a crucial role in the N-cycle. This study examined the impact of the neonicotinoid pesticide THX on N-fixing cyanobacteria Nostoc sp. PCC7120. It combined biochemical and molecular data to clarify the toxicity and recovery mechanism of Nostoc sp. PCC7120 exposed to THX. The results show that at low THX concentrations, cyanobacteria exhibited hormetic responses and then enter recovery phases, whereas at high concentrations, they showed toxicity phases before entering recovery phases. The main changes were in cell growth, antioxidant system, photosynthetic performance and N-fixation. The starch granules and vacuoles of Nostoc sp. PCC7120 became larger after THX treatment, indicating a shift in resources from growth to storage. Additionally, molecular stimulations indicated that THX could bind to molybdenum-iron cofactor sites of nitrogenase to destroy N-fixation, and also bind to Q A and Q B sites of photosynthetic proteins (D1 and D2) to affect photosynthesis. These findings provide a valuable reference for the ecological risks of THX and biogeochemical N-cycle.

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Calibration of the Cryogenic Measurement System of a Resonant Haloscope Cavity

arXiv

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arXiv 2024年

作者： He, Dong Fan, Jie Gao, Xin Gao, Yu Houston, Nick Ji, Zhongqing Jin, Yirong Li, Chuang Li, Jinmian Li, Tianjun Liu, Shi-Hang Niu, Jia-Shu Peng, Zhihui Sun, Liang Sun, Zheng Wang, Jia Wei, Puxian Wu, Lina Xiang, Zhongchen Yang, Qiaoli Zhang, Chi Zhang, Wenxing Zhang, Xin Zheng, Dongning Zheng, Ruifeng Zhou, Jian-Yong Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education Key Laboratory for Matter Microstructure and Function of Hunan Province Department of Physics Synergetic Innovation Center for Quantum Effects and Applications Hunan Normal University Changsha410081 China Institute of Physics Chinese Academy of Sciences Beijing100190 China College of Physics Sichuan University Chengdu610065 China Key Laboratory of Particle Astrophysics Institute of High Energy Physics Chinese Academy of Sciences Beijing100049 China Institute of Theoretical Physics Faculty of Science Beijing University of Technology Beijing100124 China Beijing Academy of Quantum Information Sciences Beijing100193 China College of Mechanical and Electrical Engineering Wuyi University Nanping354300 China CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences Beijing100190 China School of Physical Sciences University of Chinese Academy of Sciences No. 19A Yuquan Road Beijing100049 China Institute of Theoretical Physics Shanxi University Taiyuan030006 China College of Physics and Optoelectronic Engineering Department of Physics Jinan University Guangzhou510632 China School of Sciences Xi’an Technological University Xi’an710021 China Tsung-Dao Lee Institute School of Physics and Astronomy Shanghai Jiao Tong University 800 Dongchuan Road Shanghai200240 China National Astronomical Observatories Chinese Academy of Sciences 20A Datun Road Chaoyang District Beijing100101 China School of Astronomy and Space Science University of Chinese Academy of Sciences Beijing100049 China

Possible light bosonic dark matter interactions with the Standard Model photon have been searched by microwave resonant cavities. In this paper, we demonstrate the cryogenic readout system calibration of a 7.138 GHz copper cavity with a loaded quality factor Ql = 104, operated at 22 mK temperature based on a dilution refrigerator. Our readout system consists of High Electron Mobility Transistors as cryogenic amplifiers at 4 K, plus room-temperature amplifiers and a spectrum analyzer for signal power detection. We test the system with a superconducting two-level system as a single-photon source in the microwave frequency regime and report an overall 95.6 dB system gain and -71.4 dB attenuation in the cavity’s input channel. The effective noise temperature of the measurement system is 7.5 K. © 2024, CC BY.

关键词： Spectrum analyzers

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The application of water jet technology on concrete: A review

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Journal of Building engineering 2025年 108卷

作者： Pan, Chao Zhao, Zengfeng Lin, Can Yao, Lei Xiao, Jianzhuang Tošić, Nikola Department of Structural Engineering College of Civil Engineering Tongji University Shanghai 200092 China Key Laboratory of Performance Evolution and Control for Engineering Structures of Ministry of Education Tongji University Shanghai 200092 China Institute of Science and Technology for Carbon Peak & Neutrality Guangxi University Nanning530004 China Civil and Environmental Engineering Department Universitat Politècnica de Catalunya Jordi Girona 1-3 Barcelona08034 Spain

The application of water jet technology on concrete has garnered widespread attention, as water jetting is an advanced technique with several unique advantages, including the absence of heat generation, high-efficiency material removal, and selective separation of materials. These benefits provide a solid foundation for its use in concrete applications. This study aims to review the existing literature (more than 160 references) on the application of water jet technology on concrete and discuss the limitations of current techniques. Based on various practical scenarios, this study divided the research and applications of water jet technology on concrete into three main categories: crushing, granulation, and surface treatment. Crushing involves the controlled erosion and removal of concrete using the impact kinetic energy of the water jet. Granulation refers to the process of liberating coarse and fine recycled aggregates from waste concrete, leveraging the differing impact resistances of aggregates and cementitious materials. Surface treatment consists of using water jet to remove impurities and discarded parts from the concrete surface, thereby improving its surface properties. Water jet input parameters (e.g. water jet pressure, nozzle traverse speed, standoff distance, different forms of water jet) and concrete properties (e.g. compressive strength, steel or fiber content) could affect the crushing efficiency and surface roughness. The findings provide inspirational insights for engineers, designers, and industry stakeholders to overcome technical challenges in construction engineering and further promote the application of water jet technology on concrete. © 2025 Elsevier Ltd

关键词： Granulation

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Enhanced Interfacial Electron Transfer by Asymmetric Cu-Ov-In Sites on In2O3for Efficient Peroxymonosulfate Activation

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Angewandte Chemie 2023年第11期135卷

作者： Zhiyong Zhao Dr. Pengfei Wang Chunlin Song Tao Zhang Prof. Sihui Zhan Prof. Yi Li MOE Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Remediation and Pollution Control College of Environmental Science and Engineering Nankai University Tianjin 300350 P. R. China School of Energy and Environmental Engineering Hebei University of Technology Tianjin 300401 P. R. China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of Chemistry School of Science Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin University Tianjin 300072 P. R. China

Enhancing the peroxymonosulfate (PMS) activation efficiency to generate more radicals is vital to promote the Fenton-like reaction activity, however, how to promote the PMS adsorption and accelerate the interfacial electron transfer to boost its activation kinetics remains a great challenge. Herein, we prepared Cu-doped defect-rich In 2 O 3 (Cu-In 2 O 3 /O v ) catalysts containing asymmetric Cu−O v −In sites for PMS activation in water purification. The intrinsic catalytic activity is that the side-on adsorption configuration of the O−O bond (Cu−O−O−In) at the Cu-O v -In sites significantly stretches the O−O bond length. Meanwhile, the Cu-O v -In sites increase the electron density near the Fermi energy level, promoting more and faster electron transfer to the O−O bond for generating more SO 4 ⋅ − and ⋅OH. The degradation rate constant of tetracycline achieved by Cu-In 2 O 3 /O v is 31.8 times faster than In 2 O 3 /O v , and it shows the possibility of membrane reactor for practical wastewater treatment.

关键词： Asymmetric Cu-Ov-In sites Electron Transfer Fenton-Like Reaction PMS Activation Sulfate and Hydroxyl Radicals

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Regulating Spin Polarization through Cationic Vacancy Defects in Bi4Ti3O12for Enhanced Molecular Oxygen Activation

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Angewandte Chemie 2023年第23期135卷

作者： Dongpeng Zhang Yanxiao Li Dr. Pengfei Wang Jinyong Qu Prof. Sihui Zhan Prof. Yi Li MOE Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Remediation and Pollution Control College of Environmental Science and Engineering Nankai University Tianjin 300350 P. R. China School of Energy and Environmental Engineering Hebei University of Technology Tianjin 300401 P. R. China Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of Chemistry School of Science Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin University Tianjin 300072 P. R. China

Molecular oxygen (O 2 ) activation technology is of great significance in environmental purification due to its eco-friendly operation and cost-effective nature. However, the activation of O 2 is limited by spin-forbidden transitions, and efficient molecular oxygen activation depends on electronic behavior and surface adsorption. Herein, we prepared cationic defect-rich Bi 4 Ti 3 O 12 (BTO-MV2) catalysts containing Ti vacancies ( V Ti ) for O 2 activation in water purification. The V Ti on BTO nanosheets can induce electron spin polarization, increasing the number of spin-down photogenerated electrons and reducing the recombination of electron-hole pairs. An active surface V Ti is also formed, serving as a center for adsorbing O 2 and extracting electrons, effectively generating ⋅OH, O 2 .− and 1 O 2 . The degradation rate constant of tetracycline achieved by BTO-MV2 is 3.3 times faster than BTO, indicating a satisfactory prospect for practical application. This work provides an efficient pathway to activate molecular oxygen by constructing new active sites through cationic vacancy modification technology.

关键词： Cation Vacancy Defects Molecular Oxygen Activation Spin Polarization Water Purification

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Gut microbiota of largemouth bass in response to temperature stress

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Aquaculture Reports 2025年 43卷

作者： Dongdong Wei Zhongbao Guo Fan Chen Hongfei Su Yibing Wang Lingling Deng Jing Huang Lin Huang Fei Ling Gaoxue Wang You Li Chengfan Lu Qing Yu Pengfei Li Guangxi Key Laboratory of Aquatic Biotechnology and Modern Ecological Aquaculture Guangxi Engineering Research Center for Fishery Major Diseases Control and Efficient Healthy Breeding Industrial Technology (GERCFT) Guangxi Academy of Marine Sciences Guangxi Academy of Sciences Nanning PR China Guangxi Academy of Fishery Science Nanning Guangxi PR China College of Marine Sciences Guangxi University Nanning PR China College of Oceanography and Biotechnology Guangxi University for Nationalities Nanning PR China College of Animal Science and Technology Northwest A&F University Yangling PR China Laibin Inspection and Testing Center Laibin PR China

The intestinal microbiota plays a crucial for maintaining host health, nutrient absorption, immune regulation, and pathogen resistance. This study investigated the effects of temperature stress on the intestinal microbiota of largemouth bass, an aquaculture species highly sensitive to temperature fluctuations. Fish were acclimated to 20°C and 35°C for two weeks, and then divided into four groups that were subjected to stable or sudden temperature changes (T20–20°C, T20→35°C, T35→20°C, T35–35°C). After a 7-day exposure, intestinal microbiota was analyzed via 16S rRNA gene high-throughput sequencing. Results showed that temperature stress significantly altered microbiota composition and diversity. The relative abundances of Cetobacterium, Epulopiscium, Citrobacter, and Aeromonas were significantly increased in the cold stress (T35→20°C) group and heat stress (T20→35°C) group. In T35–35°C group, the relative abundance of the harmful bacterium Edwardsiella was significantly greater than that in the other groups (P < 0.05). Temperature stress significantly altered intestinal microbiota diversity in largemouth bass. Temperature shifted from 35°C to 20°C increased bacterial network complexity, indicating enhanced cooperation for environmental adaptation. Sustained exposure to 35℃ reduced key species connectivity in co-occurrence networks, destabilizing the microbial community structure compared to 20℃ controls. Positive bacterial interactions were more prevalent at low temperatures (T20–20°C). Temperature stress primarily influenced gut microbiota assembly through stochastic processes, reducing homogenous dispersal and increasing pathogenic bacteria sensitivity. These results demonstrate that temperature stress disrupts intestinal microbiota homeostasis, impairing host health and aquaculture management. The findings provide critical insights for optimizing thermal management in aquaculture systems.

关键词： Intestinal microbiota Largemouth bass Temperature Temperature stress

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Public’s acceptance of automated vehicles: the role of initial trust and subjective norm 63rd

Public’s acceptance of automated vehicles: the role of init...

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63rd International Annual Meeting of the Human Factors and Ergonomics Society, HFES 2019

作者： Zhang, Tingru Tan, Haibo Li, Shuling Zhu, Haoyu Tao, Da State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment Shenzhen China Institute of Human Factors and Ergonomics College of Mechatronics and Control Engineering Shenzhen University Shenzhen China State Key Laboratory of Automotive Safety and Energy Department of Industrial Engineering Tsinghua University Beijing China

ISBN: (纸本)9781713810407

This study aimed to investigate factors that determine public’s acceptance of automated vehicles (AVs) by proposing and empirically testing an AV acceptance model. The model was developed by incorporating two factors, i.e., trust and subjective norm, into the technology Acceptance Model. The validity of the model was confirmed with a structure equation modeling analysis based on data collected from 395 survey samples. It was found that trust was the most critical determinant of public’s acceptance of AVs and offered a way for other factors (i.e. perceived usefulness and social norm) to impact AV acceptance. Subjective norm was also identified as an important factor in shaping users’ usage intention, at lease in China, a country dominated by collectivistic culture. Findings from this study provide some guidelines in improving AV products to attract users. © 2019 by Human Factors and Ergonomics Society.

关键词： Acceptance tests

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Turbulent waves and oscillating amplitude of boundary-layers and radiative-heat transfer of nonlinear Williamson nanofluid over solar plate with periodic conditions

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Chaos, Solitons & Fractals 2025年 198卷

作者： Zia Ullah Md. Mahbub Alam Bagh Ali Ramzi Rzig Hanaa Abu-Zinadah Mohamed Boujelbene Nidhal Ben Khedher Center of Turbulence Control Harbin Institute of Technology (Shenzhen) Shenzhen 518055 China Department of Mathematics and Statistics The University of Lahore Sargodha-Campus 40100 Sargodha Pakistan School of Mechanical Engineering and Automation Harbin Institute of Technology Shenzhen 518055 China Department of Software Engineering Faculty of Science & Technology ILMA University Karachi 75190 Pakistan Laboratory of Thermal and Energetic Systems Studies (LESTE) at the National School of Engineering of Monastir University of Monastir Tunisia University of Jeddah College of Science Department of Mathematics and Statistics Jeddah Saudi Arabia Industrial Engineering Department College of Engineering University of Ha'il Ha'il 81451 Saudi Arabia Department of Mechanical Engineering College of Engineering University of Ha'il Ha'il 81451 Saudi Arabia

Turbulence and oscillating amplitude of boundary layers and nonlinear radiative heat and concentration motion of transient Williamson nanomaterial model alongside inclined solar surface with entropy optimization, magnetic oscillation, dynamic solar energy, and thermo diffusion is the novelty of this work. The objective of this problem is to scrutinize the speed streamlines, isothermal lines, energy/temperature and mass/concentration fields, steady heating ratio and instability of fluctuating energy/heat transfer alongside inclined plate at angle π/4. Governing mathematical formulation is developed to find the numerical outcomes of unknown physical properties. Fluctuating Stokes transformations and dimensionless variables are developed to reduce governing equations into oscillatory and steady equations with defined boundary values. Various pertinent parameters are generated for physical analysis of heat rate such as Eckert number ( E c ), buoyancy number ( λ T ), oscillating magnetic parameter ( M f ), Schmidt number ( S c ), radiation number ( R d ), thermophoresis number ( N T ), Prandtl number ( Pr ), and Brownian motion number ( N b ). Primitive variable transformation is applied to generate symmetry in all governing equations in FORTRAN programming tool for accurate asymptotic results. Implicit formula of finite difference scheme with central and backward relation is used to convert system of equations into algebraic equations. The obtained algebraic equations are solved through Gaussian elimination technique to explore fluid flow, heat and mass rate, and periodical fluctuations in thermal and concentration gradients. It is perceived that high largeness in fluid speed and energy/temperature field is depicted as thermal radiating constraint upsurges. The magnitude of streamlines ad isothermal lines is decreased as oscillating magnetic number and Eckert number increases but isothermal lines increased with maximum strong magnetic field. High oscillations in turbule

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Disorder-induced pronounced magnetoresistive hysteresis in Josephson junctions

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Physical Review B 2025年第13期111卷 134513-134513页

作者： Yu Wu Daiqiang Huang Huanyu Zhang Anita Guarino Rosalba Fittipaldi Chao Ma Wenjie Hu Chang Niu Zhen Wang Weichao Yu Yuriy Yerin Antonio Vecchione Yang Liu Mario Cuoco Hangwen Guo Jian Shen State Key Laboratory of Surface Physics and Institute for Nanoelectronic Devices and Quantum Computing Fudan University Shanghai 200433 People's Republic of China Department of Physics Fudan University Shanghai 200433 People's Republic of China Shanghai Aerospace Control Technology Institute Shanghai 201109 People's Republic of China International Center for Quantum Materials Peking University Beijing 100871 People's Republic of China CNR-SPIN c/o Universitá di Salerno I-84084 Fisciano (SA) Italy College of Materials Science and Engineering Hunan University Changsha 410082 People's Republic of China Department of Physics University of Science and Technology of China Hefei Anhui 230026 Peoples Republic of China CNR-SPIN via del Fosso del Cavaliere 100 00133 Roma Italy Hefei National Laboratory Hefei 230088 People's Republic of China Zhangjiang Fudan International Innovation Center Fudan University Shanghai 201210 People's Republic of China Shanghai Research Center for Quantum Sciences Shanghai 201315 People's Republic of China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 People's Republic of China

The relation between superconductivity and time-reversal symmetry is one of the most fascinating problems in condensed-matter physics. Here we report an anomalous transport behavior in superconducting Josephson junctions induced by surface disorder. We fabricate vertical Josephson junctions using metallic superconductor (Al) and ion-bombarded Sr2RuO4. Below the superconducting transition temperature, we observe persistent magnetoresistive hysteresis behavior dependent on the disorder deposition time. Field- and temperature-dependent measurements suggest that the observed effects arise from disorder-induced anomalous flux in Sr2RuO4 which can be sensitively detected by superconducting Al. To account for the observed findings, we consider different physical scenarios such as interband surface pairing reconstruction, magnetic surface states, and vortex phases.

关键词： Hysteresis

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Position Sensorless control of Permanent Magnet Synchronous Motor Based on Adaptive Sliding Mode Observer

Position Sensorless Control of Permanent Magnet Synchronous ...

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Chinese Automation Congress (CAC)

作者： Tao Zhang Yingjie Xiong Bolun Wang Hongyu Yan Xiyou Chen School of Electrical Engineering Dalian University of Technology Dalian China Shenyang Institute of Automation Chinese Academy of Sciences Shenyang China Institutes for Robotics and Intelligent Manufacturing Chinese Academy of Sciences Shenyang China Key Laboratory of Networked Control Systems Chinese Academy of Sciences Shenyang China College Of Information Science and Engineering Northeastern University Shenyang China School of Artificial Intelligence Shenyang University of Technology Shenyang China

ISBN: (纸本)9781665426480

Permanent magnet synchronous motors(PMSM) are popular in AC motor applications due to their small size, high efficiency. They have appeared widely in various areas of life. Due to the high-frequency chattering problem caused by sliding mode observer sensorless control of PMSM, an SMO with piecewise control function is designed in this paper. At the same time, based on the back EMF output of the SMO, the gain of the SMO is adapted to reduce the system bucket vibration problem caused by the conventional SMO. Finally, a simulation experiment was carried out in MATLAB/SIMULINK and compared with the conventional SMO. The results show that the improved SMO has achieved a better control effect.

关键词： Vibrations Adaptation models AC motors Force Sensorless control Observers Permanent magnet motors

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