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arXiv 2022年

作者： Zhu, Jin-Ping Wang, Xiangyu Ivy Sun, Hui Yang, Yuan-Pei Li, Zhuo Hu, Rui-Chong Qin, Ying Wu, Shichao Department of Astronomy School of Physics Peking University Beijing100871 China School of Astronomy and Space Science Nanjing University Nanjing210093 China Key Laboratory of Modern Astronomy and Astrophysics Nanjing University Ministry of Education China Key Laboratory of Space Astronomy and Technology National Astronomical Observatories Chinese Academy of Sciences Beijing100012 China South-Western Institute for Astronomy Research Yunnan University Yunnan Kunming650500 China Kavli Institute for Astronomy and Astrophysics Peking University Beijing100871 China Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and Technology Guangxi University Nanning530004 China Department of Physics Anhui Normal University Anhui Wuhu241000 China Max-Planck-Institut für Gravitationsphysik Albert-Einstein-Institut HannoverD-30167 Germany Leibniz Universität Hannover HannoverD-30167 Germany

Gamma-ray bursts (GRBs) have been phenomenologically divided into long- and short-duration populations, generally corresponding to the collapsar and compact merger origin, respectively. Here we collect three unique bursts, GRBs 060614, 211211A and 211227A, all characterized by a long-duration main emission (ME) phase and a rebrightening extended emission (EE) phase, to study their observed properties and the potential origin as neutron star–black hole (NSBH) mergers. NS-first-born (BH-first-born) NSBH mergers tend to contain fast-spinning (non-spinning) BHs that more easily (hardly) allow tidal disruption to happen with (without) forming electromagnetic signals. We find that NS-firstborn NSBH mergers can well interpret the origins of these three GRBs, supported by that: (1) Their X-ray MEs and EEs show unambiguous fall-back accretion signatures, decreasing as ∝ t−5/3, which might account for their long duration. The EEs can result from the fall-back accretion of r-process heating materials, predicted to occur after NSBH mergers. (2) The beaming-corrected local event rate density for this type of merger-origin long-duration GRBs is R0 ∼ 2.4+2.3−1.3 Gpc−3 yr−1, consistent with that of NS-first-born NSBH mergers. (3) Our detailed analysis on the EE, afterglow and kilonova of the recently high-impact event GRB 211211A reveals it could be a merger between a ∼ 1.23+0.06−0.07 M☉ NS and a ∼ 8.21−0.75+0.77 M☉ BH with an aligned-spin of χBH ∼ 0.62+0.06−0.07, supporting an NS-first-born NSBH formation channel. Long-duration burst with rebrightening fall-back accretion signature after ME, and bright kilonova might be commonly observed features for on-axis NSBH mergers. We estimate the multimessenger detection rate between gravitational waves, GRB and kilonova emissions from NSBH mergers in O4 (O5) is ∼ 0.1 yr−1 (∼ 1 yr−1). Copyright © 2022, The Authors. All rights reserved.

关键词： Gravity waves

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Synthesis and Luminescent Properties of the Bipyridine Derivative with a D-A-A Structure

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Journal of Molecular Structure 2025年

作者： Hanfei Xiang Yonghe Zhang Zhefeng Wang Jie Sun Zhengcheng Zhang Zengrui Xing Peng Zhang Zhenghua Ju Gansu Province Organic Semiconductor Materials and Technology Research Centre School of Materials Science and Engineering Lanzhou Jiaotong University Lanzhou 730070 China Key Laboratory of Nonferrous Metals Chemistry and Resources Utilization of Gansu Province； Center of Analysis and Testing of Lanzhou University； College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 China

A donor-acceptor1-acceptor2 (D-A1-A2) pyridine derivative (P263) was designed and synthesized. The theoretical calculations showed that the mixed character of the locally excited (LE) and intramolecular charge transfer (ICT) in the T n states could be beneficial to achieve high spin-orbit coupling (SOC) values, thereby promoting efficient intersystem crossing (ISC). The fluorescence emission spectra of P263 exhibited an obvious solvent-dependent emission behavior, which was attributed to the effective ICT through the introduction of dual acceptor units. In addition, the protonation/deprotonation processes of the nitrogen atoms in the pyridine units induced the alterations in the emission spectra, rendering P263 a fluorescent sensor for proton (H + ) detection. Moreover, the pyridine units could form the hydrogen-bonding interactions with the poly(vinyl alcohol) (PVA) matrix, which was favorable for the suppression of the nonradiative decays and the stabilization of the triplet excitons. The obtained P263@PVA film through doping P263 into PVA showed room-temperature phosphorescence (RTP) properties with a long lifetime of 535 ms and the quantum yields of 3.62%.

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One-pot synthesis of visible-light responsive BiOCl/BiOBr/g-C 3 N 4 ternary heterojunction with excellent photocatalytic activity

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Journal of Water Process Engineering 2025年 76卷

作者： Lijun Cheng Jianhua Shi Bingjing Yao Yiyun Peng Wenhui Li Shun Xin Hua Gao Shaohua Ma Tianjin Key Laboratory of Integrated Design and On-line Monitoring for Light Industry & Food Machinery and Equipment Tianjin University of Science and Technology Tianjin 300222 China Tianjin International Joint Research and Development Center of Low-Carbon Green Process Equipment Tianjin 300222 China College of Mechanical Engineering Tianjin University of Science and Technology Tianjin 300222 China Offshore Oil Engineering Co. Ltd Tianjin 300450 China Beijing Institute of Aerospace Testing Technology Beijing 100074 China

BiOCl/BiOBr/g-C 3 N 4 ternary heterojunctions were prepared via one-pot method and their photocatalytic sterilization performances for Escherichia coli ( E. coli ) and Staphylococcus aureus ( S. aureus ) under visible light illumination were investigated. The highest activity was obtained over BiOCl/BiOBr/g-C 3 N 4 ternary composite with n(Bi): n(g-C 3 N 4 ) of 1:1, which approximately inactivated 100 % of E. coli in 2 h and 87.67 % of S. aureus in 3 h. Contrast to pure BiOCl, BiOBr, g-C 3 N 4 and BiOCl/g-C 3 N 4 , BiOBr/g-C 3 N 4 , BiOCl/BiOBr binary heterojunctions, the enhanced photocatalytic sterilization performance of the ternary heterojunction could be mainly attributed to its relatively stronger light absorption, larger specific surface area and more effective charge carriers separation. Last, the sterilization mechanism of the ternary heterojunction was discussed in detail.

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analysis of detection error for spot position in fiber nutation model

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Chinese Optics Letters 2020年第2期18卷 15-19页

作者： Xueqiang Zhao Yunpeng Zhang Minjie Huang Peipei Hou Ren Zhu Jianfeng Sun Xia Hou Weibiao Chen Key Laboratory of Space Laser Communication and Detection Technology Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Laboratory of Space Laser Engineering Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China

The influences of nutation trail accuracy,simplification of coupling model,spot position jitter,and power variation of incident light on the detection error are analyzed *** the condition of satisfying the requirements,the nutation radius is less than 1.13μm,the accuracy of the nutation trail is less than 0.04μm,and the detection range is[?5μm,+5μm].The nutation frequency is 160 times spot position jitter frequency and 100 times intensity jitter frequency of incident *** analysis is of great significance for determining nutation radius and frequency in the tracking system based on fiber nutation.

关键词： fiber nutation detection error tracking system

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Elucidating the Mechanism of Temporal Adaptation to Hydrogen Peroxide-Induced Oxidative Stress inCorynebacterium glutamicum

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Microbial Biotechnology 2025年第6期18卷

作者： Chang Yu Wenjing Hu Xiaoyu Li Yu Lei Dandan Gao Meng Wang Ping Zheng Yan Zhu Jibin Sun Tianjin Institute of Industrial Biotechnology Chinese Academy of Sciences Tianjin China University of Chinese Academy of Sciences Beijing China School of Bioengineering Tianjin University of Science and Technology Tianjin China National Key Laboratory of Engineering Biology for Low-carbon Manufacturing Tianjin Institute of Industrial Biotechnology Chinese Academy of Sciences Tianjin China

Corynebacterium glutamicum serves as a pivotal industrial chassis for biomanufacturing and an ideal model for studying the phylogenetically related pathogen Mycobacterium tuberculosis . Oxidative stress poses a critical challenge to microorganisms during aerobic industrial processes and immune cell-mediated antibacterial killing by perturbing cellular redox homeostasis, affecting central metabolism, and damaging the integrity of biomacromolecules. However, the intricate mechanisms underlying the dynamic defence of C. glutamicum , despite previous transcriptomic studies on acute and adaptive responses to oxidative stresses, remain largely unclear, hindering strain engineering for industrial applications and the development of effective antimicrobial treatments. In this study, the susceptibility of C. glutamicum to hydrogen peroxide (H 2 O 2 ) was evaluated, and the inhibitory dynamics of H 2 O 2 were characterised through viable cell counting. RNA sequencing (RNA-seq) was employed to analyse gene expression changes after exposure to 720 mM H 2 O 2 . The treatment induced differential expression of 966 and 787 genes at 2 and 6 h, respectively, reflecting perturbations across a broad array of pathways, including (i) enhanced H 2 O 2 and peroxide scavenging, mycothiol biosynthesis, and iron chelation; (ii) repressed central metabolism and enhanced anaplerosis; (iii) elevated sulphur assimilation; (iv) altered amino acid biosynthesis; and (v) altered transcriptional regulation in response to oxidative stress. Further validation by overexpression of ahpD , cysN , and exogenous supplementation with l -methionine and l -cysteine significantly enhanced bacterial tolerance to H 2 O 2 . Overall, this study provides the most comprehensive analysis to date of temporal cellular adaptation to H 2 O 2 stress in C. glutamicum , establishing a foundation for future applications in both biomanufacturing and antimicrobial research.

关键词： Corynebacterium glutamicum hydrogen peroxide industrial stress redox homeostasis transcriptomic analysis

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Antisolvent-Regulated Anionic Coordination Enabling Stable Li Metal Anode in Urea-Based Electrolyte

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Angewandte Chemie 2025年第23期137卷

作者： Xiaopeng Pei Ting Ou Yiju Li Yufan Xin Lu Chen Mengqi Wang Junliang Du Shaojun Guo Ying Tan Wenzhou Institute University of Chinese Academy of Sciences Wenzhou 325000 China School of Materials Science and Engineering Peking University Beijing 100871 China Institute of Theoretical and Computational Chemistry Shaanxi Key Laboratory of Catalysis School of Chemical & Environment Science Shaanxi University of Technology Hanzhong 723001 China Department of Mechanical and Energy Engineering Southern University of Science and Technology Shenzhen 518055 China

The fabrication of NO 3 − anion-participating solvation sheaths to derive inorganic-rich solid electrolyte interphase (SEI) layers is critical for enhancing the stabilization of lithium metal batteries (LMBs). However, the application of LiNO 3 salt is limited by its low solubility and the challenge of controlling NO 3 − coordination, primarily due to its high donor number. Herein, we demonstrate an antisolvent-enhanced anionic coordination effect in urea-based LiNO 3 electrolytes for boosting the cycling stability of LMBs. We find that the incorporation of 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl ether (TTE) into these electrolytes enhances the interaction between the NO 3 − anion and urea-based solvent to Li + in the solvation sheath, resulting in an increase in ion-pair formation. This also induces a transformation of the NO 3 − anion from a monodentate to a bidentate coordination configuration, facilitating preferential nitrate reduction at the anode interface. The optimized electrolyte formulation demonstrates remarkable cycling stability in lithium metal anode, achieving 6000 h of operation in a Li||Li cell and a high Coulombic efficiency of 99.6% in a Li||Cu cell. In full-cell testing, Li||LiFePO 4 cells (N/P = 3) maintain 88% capacity retention after 100 cycles at 0.2C.

关键词： Antisolvent Inorganic-rich SEI LiNO3 Lithium metal battery Urea-based solvent

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Inulin Can Alleviate Metabolism Disorders in ob/ob Mice by Partially Restoring Leptinrelated Pathways Mediated by Gut Microbiota

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Genomics, Proteomics & Bioinformatics 2019年第1期17卷 64-75页

作者： Xiaofeng Song Liang Zhong Na Lyu Fei Liu Boxing Li Yanan Hao Yong Xue Jing Li Yuqing Feng Yue Ma Yongfei Hu Baoli Zhu CAS Key Laboratory of Pathogenic Microbiology and Immunology Institute of Microbiology Chinese Academy of Sciences Savaid Medical School University of Chinese Academy of Sciences Beijing Key Laboratory of Microbial Drug Resistance and Resistome College of Food Science and Nutritional Engineering China Agricultural University State Key Laboratory of Animal Nutrition College of Animal Science and Technology China Agricultural University Department of Pathogenic Biology School of Basic Medical Sciences Southwest Medical University

Inulin has been used as a prebiotic to alleviate glucose and lipid metabolism disorders in mice and humans by modulating the gut microbiota. However, the mechanism underlying the alleviation of metabolic disorders by inulin through interactions between the gut microbiota and host cells is unclear. We use ob/ob mice as a model to study the effect of inulin on the cecal microbiota by16 S rRNA gene amplicon sequencing and its interaction with host cells by transcriptomics. The inulin-supplemented diet improved glucose and lipid metabolism disorder parameters in ob/ob mice,alleviating fat accumulation and glucose intolerance. The a diversity of gut microbial community of ob/ob mice was reduced after inulin treatment, while the b diversity tended to return to the level of wild type mice. Interestingly, Prevotellaceae UCG 001(family Prevotellaceae) was obviously enriched after inulin treatment. A comparative analysis of the gene expression profile showed that the cecal transcriptome was changed in leptin gene deficiency mice, whereas the inulin-supplemented diet partially reversed the changes in leptin gene-related signaling pathways, especially AMPK signaling pathway, where the levels of gene expression became comparable to those in wild type *** analysis indicated that Prevotellaceae UCG 001 was positively correlated with the AMPK signaling pathway, which was negatively correlated with markers of glycolipid metabolism disorders. Our results suggest that the inulin-supplemented diet alleviates glucose and lipid metabolism disorders by partially restoring leptin related pathways mediated by gut microbiota.

关键词： Prebiotics Gut microbiota Obesity Transcriptome Metabolic disorders

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Design of the TP-1B Satellite’s Laser Retro-reflector Array and analysis of Laser Ranging

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Advances in Space Research 2025年

作者： Qingshan Luo Xu Liu Tao Yang Yurui Xu Wei Zhu Yunsheng Yao Institute of Disaster Prevention Sanhe 065201 Hebei China Hebei Provincial Key Laboratory of Seismic Disaster Instrumentation and Monitoring Technology 065201 Hebei China National Space Science Center Chinese Academy of Sciences 100190 Beijing China Key Laboratory of Earthquake Geodesy Institute of Seismology China Earthquake Administration 430071 Hubei China

To meet the highly precise orbit requirements of the Tianping-1B (TP-1B) satellite used for providing equipment calibration, a distributed laser retro-reflector array (LRA) has been designed with a weight of approximately 450 g, an effective reflective area of more than 4.6 cm 2 and a field of view of more than 120° for performing laser ranging and supporting scientific test missions. The LRA consists of two types of cube corner retro-reflectors (CCRs) installed on the ground-facing side of the satellite: one is a nadir-facing CCR, and the other is six CCRs each featuring a 50° structural tilt angle. First, according to the orbital characteristics of the TP-1B satellite, its orbital flight duration has been predicted by the satellite laser ranging (SLR) station. Then, taking into account the spatial distribution of the CCR, the effective reflective area distribution of the LRA has been calculated. Furthermore, considering the additional phase shift caused by the dihedral angle offset of the CCR, as well as surface shape offsets in the reflective and incident planes, the far-field diffraction pattern of the CCRs has been plotted, Meanwhile, based on the laser ranging radar equation and the parameters of the SLR system, the number of laser echoes and laser ranging precision of the TP-1B satellite laser ranging have been calculated. Finally, SLR stations were used to track and perform ranging precision experiments on the TP-1B satellite. The actual measurement results at the SLR station show that the ranging precision is 5.3 mm and the average number of echo photons per second reaches 459. These results are consistent with the previous theoretical calculations and analysis, which further validates the effectiveness of the designed LRA and will guide the design of future LRA.

关键词： LRA SLR Effective reflective area distribution CCR Ranging precision

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Insights into the Lunar Imbrium Basin Mare Units by Characterizing Their Regolith Property, Chronology, and Composition

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The Planetary science Journal 2025年第6期6卷 141-141页

作者： Shuangshuang Wu Jianping Chen Feng Zhang Cheng Zhang Xiaojian Xu School of Earth Sciences and Resources China University of Geosciences Beijing 100083 People’s Republic of China State Key Laboratory of Solar Activity and Space Weather National Space Science Center Chinese Academy of Sciences Beijing 100190 People’s Republic of China School of Land Science and Technology China University of Geosciences (Beijing) Beijing 100083 People’s Republic of China

Mare basalts are volcanic products that filled the large topographic depressions on the Moon. Investigating volcanic activity aids in deeply understanding the lunar endogenic geological processes and thermal evolution over time. Previous studies on lunar volcanism mainly focused on using optical, spectral, and topographical data, which are good at analyzing lunar surface morphology and composition, but detection of its subsurface regolith property has been greatly restricted. Chang'E-2 microwave radiometer data can reveal the thermal and dielectric properties of mare deposits to variable depths and identify potential lava flows, providing a new perspective for delineating volcanic units. This work presents a comprehensive analysis of the regolith properties, chronology, and composition of mare basalts in the Imbrium basin, aiming to reveal the details of the basin's volcanic history and thermal evolution. Trend surface analysis was applied to remove latitude effects, generating detrended brightness temperature difference (dTB) maps that distinctly highlight major mare deposits. We identified Imbrium mare units using detrended dTB maps, which effectively capture the diurnal temperature variations. Results show at least three major episodes of lava filling events in the basin, approximately occurring at 3.51 Ga, 3.26 Ga, and 2.76 Ga, respectively. Although the range of compositions varied in each eruption, the general trend suggests an increasingly highly evolved composition for the mare deposits emplaced in the Imbrium basin over time. The updated geological map provides detailed regional background information for understanding the evolution of the Imbrium basin.

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Configurational Isomerization-Induced Orientation Switching: Non-Fused Ring Dipodal Phosphonic Acids as Hole-Extraction Layers for Efficient Organic Solar Cells

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Angewandte Chemie 2024年第48期136卷

作者： Lei Zhang Yuxing Wang Junjie Wen Yifan Huang Jiaxin Gao Yuxin Duan Soohyung Park Woojin Shin Zaifei Ma Miao Liu Sang Wan Cho Yeonju Park Young Mee Jung Hyunbok Lee Wenxu Liu Yao Liu State Key Laboratory of Chemical Resource Engineering Beijing Advanced Innovation Center for Soft Matter Science and Engineering College of Chemistry Beijing University of Chemical Technology Beijing 100029 China These authors contributed equally to this work Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Center for Advanced Low-dimension Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China Advanced Analysis Center Korea Institute of Science and Technology and Division of Nanoscience & Technology KIST School University of Science and Technology (UST) Seoul 02792 Republic of Korea Department of Physics Kangwon National University 1 Gangwondaehak-gil Chuncheon-si Gangwon-do 24341 Republic of Korea Department of Physics Yonsei University 1 Yonseidae-gil Wonju-si Gangwon-do 26493 Republic of Korea Department of Chemistry Institute for Molecular Science and Fusion Technology Kangwon National University 1 Gangwondaehak-gil Chuncheon-si Gangwon-do 24341 Republic of Korea

Phosphonic acid (PA) self-assembled molecules have recently emerged as efficient hole-extraction layers (HELs) for organic solar cells (OSCs). However, the structural effects of PAs on their self-assembly behaviors on indium tin oxide (ITO) and thus photovoltaic performance remain obscure. Herein, we present a novel class of PAs, namely “non-fused ring dipodal phosphonic acids” (NFR-DPAs), featuring simple and malleable non-fused ring backbones and dipodal phosphonic acid anchoring groups. The efficacy of configurational isomerism in modulating the photoelectronic properties and switching molecular orientation of PAs atop electrodes results in distinct substrate surface energy and electronic characteristics. The NFR-DPA with linear (C 2h symmetry) and brominated backbone exhibits favorable face-on orientation and enhanced work function modification capability compared to its angular (C 2v symmetry) and non-brominated counterparts. This makes it versatile HELs in mitigating interfacial resistance for energy barrier-free hole collection, and affording optimal active layer morphology, which results in an impressive efficiency of 19.11 % with a low voltage loss of 0.52 V for binary OSC devices and an excellent efficiency of 19.66 % for ternary OSC devices. This study presents a new dimension to design PA-based HELs for high-performance OSCs.

关键词： non-fused ring dipodal phosphonic acid configurational effect hole-extraction layer organic solar cells

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