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Experimental demonstration of 220-GHz terahertz signals wireless transmission over 4.6 km

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Science China(Information Sciences) 2025年第1期68卷 386-388页

作者： Yi WEI Jianjun yu Mingxu WANG Xiongwei YANG Qiutong ZHANG Jingwen TAN Bing ZHANG Ying WU Yang HAN Peng TIAN Wen zhou Kaihui WANG Feng ZHAO State Key Laboratory of ASIC and System Key Laboratory for Information Science of Electromagnetic Waves (MoE)School of Information Science and Technology Fudan University School of Electronic Engineering Xi'an University of Posts and Telecommunications

The advancement of terahertz (THz) communication technology drives the evolution of wireless communication systems,offering novel pathways and technical means for the development of future 6G communication *** wireless communication systems are often constrained by bandwidth limitations of electronic devices in high frequency ***,THz communication technology leverages the characteristics of electromagnetic waves to transcend these limitations,enabling communication athigher frequencies and wider bandwidths.

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Thermally triggered topological polymerization in diacetylene-functionalized covalent organic framework toward enhanced memristive properties

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Science China Chemistry 2025年

作者： Panke zhou yuxing Huang Ziyue yu Cong Zhang Qian Chen Yiping Li Chao Lin Xiong Chen State Key Laboratory of Photocatalysis on Energy and Environment Key Laboratory of Advanced Carbon-Based Functional MaterialsCollege of Chemistry Fuzhou University

The development of stimuli-responsive switching memory devices and the elucidation of their switching mechanisms in specific environments are crucial for advancing the field of molecular electronics. Herein, we propose two distinct two-dimensional covalent organic frameworks (COFs), namely Py-EDA and Py-BDA, incorporating acetylene (-C≡C-) or diacetylene(-C≡C-C≡C-) moieties, respectively, targeting fabricate memory devices exhibiting stimuli-responsive switching *** findings demonstrate that the incorporation of acetylene units effectively modulates the electronic band structure and enhances the degree ofπ-conjugation, resulting in devices that exhibit typical bipolar nonvolatile memory performance. Notably,upon thermal treatment, the memory behavior of the ITO/Py-BDA/Ag device transitions to a write-once-read-many-times(WORM) mode, displaying decreased SET voltage, increased ON/OFF current ratio, and remarkable retention reliability and cycle stability. This switching behavior is attributed to the occurrence of interlayer solid-state topological polymerization at 350℃, leading to the transformation of diacetylene columnar arrays into enyne chains within Py-BDA, thereby further promoting interlayer charge transfer and separation.

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用正电子湮没方法研究有机导体

化学学报 1988年第6期46卷 528-531页

作者：王蕴玉周光明朱道本中国科学院高能物理研究所北京中国科学院化学研究所北京

本文测量一些新的复合物型有机导体中正电子湮没的寿命谱,线形参数和3γ湮没的相对产额.结果表明,在电荷完全转移的绝缘体和电荷部分转移的导体中.

关键词：正电子湮没有机导体复合物离域电荷顺磁性正电子源粒子源电导率电性导电性能寿命谱仪

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肉毒毒素防治药物的研究进展

军事医学 2012年第12期36卷 954-958页

作者：余云舟孙志伟郑涛黄培堂军事医学科学院生物工程研究所北京10007

肉毒毒素是目前已知毒性最强的蛋白质,可以引发严重的突发公共卫生事件,也是重要的生物战剂和生物恐怖剂,因此迫切需要研制医学防治药物以应对其威胁。本文概述了国内外在肉毒毒素预防性疫苗和治疗性中和抗体防治药物研发进展,同时分析... 详细信息

肉毒毒素是目前已知毒性最强的蛋白质,可以引发严重的突发公共卫生事件,也是重要的生物战剂和生物恐怖剂,因此迫切需要研制医学防治药物以应对其威胁。本文概述了国内外在肉毒毒素预防性疫苗和治疗性中和抗体防治药物研发进展,同时分析了肉毒毒素防治药物的新趋势和今后的主要发展方向。

关键词：肉毒毒素类疫苗中和抗体生物安全

抑制剂联用或与抗毒素联用对肉毒毒素中毒小鼠的解毒活性研究

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军事医学 2020年第6期44卷 443-448页

作者：黄超黄秋园张敏余硕陈荣芳余云舟刘佳肖新荣戴秋云南华大学化学化工学院湖南衡阳421000 军事科学院军事医学研究院生物工程研究所北京100071

目的为提高单个小分子及A型肉毒毒素抗毒素的解毒活性,研究小分子抑制剂[包括川楝素、3,4-二氨基吡啶(DAP)、依布硒啉(ebselen)、4-溴苯甲醛N-(2,6-二甲基苯基)缩氨基脲(EGA)]联用、A型肉毒毒素抗毒素与小分子抑制剂联用对A型肉毒毒素... 详细信息

目的为提高单个小分子及A型肉毒毒素抗毒素的解毒活性,研究小分子抑制剂[包括川楝素、3,4-二氨基吡啶(DAP)、依布硒啉(ebselen)、4-溴苯甲醛N-(2,6-二甲基苯基)缩氨基脲(EGA)]联用、A型肉毒毒素抗毒素与小分子抑制剂联用对A型肉毒毒素中毒小鼠的解毒活性。方法昆明小鼠雌雄各半,每组10只,对照组、实验组小鼠均分别腹腔注射A型肉毒毒素(2×LD50/只)。小分子联用实验中,A型肉毒毒素给毒后4 h,分别腹腔注射(或灌胃)溶媒(对照组)、小分子抑制剂川楝素、DAP、ebselen、EGA,或8 h时第2次腹腔注射(或灌胃)上述小分子抑制剂或混合物。抗毒素与小分子联用实验中,A型肉毒毒素给毒后6 h,实验组均分别腹腔注射抗毒素(5 U/只)或抗毒素标准品(4 U/只),7 h后分别腹腔注射溶媒、小分子抑制剂或混合物。观察72 h内上述各对照组及给药组小鼠的生存情况,采用Log-rank检验分析各小组间的存活率差异。结果对照组12 h存活30%~40%,24 h内基本全部死亡。与对照组相比,腹腔注射小分子川楝素(3 mg/kg)、DAP(5 mg/kg)、EGA(10 mg/kg),存活率无显著差异(P>0.05)。川楝素与DAP联用、川楝素与EGA联用、川楝素与DAP及EGA混合物联用能延长中毒小鼠的存活时间(P值分别为0.038、0.022、0.016),但与单用各小分子抑制剂相比存活率无显著差异(P>0.05)。DAP与EGA联用与单用DAP、EGA相比,能延长中毒性小鼠的存活时间(P值分别为0.030、0.031)。与单用抗毒素相比,抗毒素与小分子川楝素、DAP、ebselen、EGA联用,存活率无显著差异(P>0.05)。结论川楝素分别与DAP、EGA联用,DAP与EGA联用,川楝素与(DAP+EGA)混合物联用均能延长中毒小鼠死亡时间,抗毒素与小分子川楝素、DAP、ebselen、EGA联用不能显著提高抗毒素的抗毒活性。

关键词：肉毒杆菌毒素,A型抑制剂抗毒素类联用解毒活性

Distributed fiber optic sensing system for vibration monitoring of 3D printed bridges

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Optoelectronics Letters 2025年第1期21卷 28-34页

作者： ZHAO Shuai zhou Ran LUO Mingming LIU Jianfei LIU Xiongfei zhou Tao School of Electronic Information Engineering Hebei University of Technology Tianjin Key Laboratory of Electronic Materials and Devices School of Civil Engineering and Transportation Hebei University of Technology Tianjin Jinhang Institute of Technical Physics

The fiber optic sensing technology provides data support in structural health monitoring of the macro facilities, including design, construction, and maintenance of bridges, tunnels, ports and other infrastructures. In this paper, a distributed vibration sensing system is proved to be responsive to a single touch over a 1.8-m-long equivalent fiber segment, covering a vibration frequency from 5 Hz to 25 kHz. The sensing fiber was arranged as an S type layout on the bridge to recognize the standing state, windblown disturbance, and walking vibration. Moreover, the knocking and climbing events are recognized fiber laying spinning lines and hanging on the fences, respectively. The demonstration shows an accurate positioning and sensitive vibration monitoring applied on the automated three-dimensional(3D) printed bridge, which is applicable to all kinds of 3D printed facilities as intelligent sensory neuro-networks.

关键词： Spinning (fibers)

玉米自交系Ⅱ型胚性愈伤组织诱导及遗传转化初报

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吉林农业大学学报 2000年第4期22卷 41-44页

作者：杜娟余云舟张领兵季静王罡中国人民解放军军需大学植物基因工程研究中心长春130062

以玉米自交系 340芽尖、4112未成熟幼胚为试验材料 ,诱导出良好的Ⅱ型胚性愈伤组织 ;用这 2种材料的Ⅱ型胚性愈伤组织为受体 ,通过基因枪轰击法将Bar基因转入玉米细胞 ,然后用GUS基因检测 ,结果为阳性。

关键词：玉米愈伤组织基因枪 Bar基因培养配方

Controlled cationic ring-opening polymerization of L-lactide by organic ion pair: novel approach to isotactic-rich and crystalline polylactide

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Science China Chemistry 2025年第1期68卷 394-402页

作者： Zhiqiang Ding Mingqian Wang Zijing zhou Bin Wang yuesheng Li Tianjin Key Laboratory of Composite & Functional Materials School of Materials Science and Engineering Tianjin University

Living/controlled cationic ring-opening polymerization （ROP） of L-lactide is a promising approach to isotactic-rich and crystalline poly（L-lactide）.In contrast with the unsubstituted lactones,L-LA can not be polymerized by organic Lewis acids or carbenium ions,and the state of the art in this field is the cationic ROP of L-LA catalyzed by Br?nsted acid/alcohol system via activated monomer ***,we reported the first example of controlled cationic ROP of L-LA by using Meerweintype ion pair[Me3O]+[B（C6F5）4]-as the catalyst.[Me3O]+[B（C6F5）4]-promoted rapid L-LA cationic polymerization in the absence of alcohol,producing isotactic-rich and crystalline PLLA without transesterification and epimerization side *** activated chain end mechanism,involving twice SN2 substitution and configuration-inversion （S→R→S） with the assistance of released Me2O,was proposed and further verified by density functional theory and control *** work expands the catalytic toolbox of isotactic-rich and crystalline polylactide *** represents a unique example of cationic-controlled polymerization of L-LA catalyzed by an organic ion pair.

关键词： organic ion pair controlled cationic ring-opening polymerization activated chain end mechanism isotactic-rich polylactide

Dietary carbohydrate intake and risk of type 2 diabetes:a 16-year prospective cohort study

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Science China Life Sciences 2025年

作者： Lu Gan Yi Yang Bin Zhao Kai yu Kehua Guo Fang Fang Zhiguang zhou Demetrius Albanes Jiaqi Huang Key Laboratory of Diabetes Immunology Ministry of Education and Department of Metabolism and Endocrinology The Second Xiangya Hospital of Central South University CSU-Sinocare Research Center for Nutrition and Metabolic Health Xiangya School of Public Health Central South UniversityFurong Laboratory Division of Cancer Epidemiology and Genetics National Cancer Institute NIH Department of Health and Human Services School of Computer Science and Engineering Central South University Institute of Environmental Medicine Karolinska Institute National Clinical Research Center for Metabolic Diseases Key Laboratory of Diabetes Immunology Ministry of Education and Department of Metabolism and Endocrinology The Second Xiangya Hospital of Central South University

Despite considerable research underscoring the importance of carbohydrate intake in relation to the risk of type 2 diabetes(T2D), a comprehensive assessment of this relationship is currently lacking. We aimed to examine the associations of various types and food sources of dietary carbohydrate intake with the risk of T2D, to evaluate potential effect modification by other factors, including genetic susceptibility,and to explore the potential mediators for such associations. The present study included 161,872 participants of the UK Biobank who were free of prevalent cancer, cardiovascular disease, or diabetes, and had at least one validated 24-h dietary recall assessment. Multivariableadjusted age-stratified Cox proportional hazard regression models were applied to estimate hazard ratios(HRs) and 95% confidence intervals(CI) for the associations of various types and food sources of dietary carbohydrate intake with risk of T2D. During a median follow-up of13.6 years, 4,176 incident cases of T2D were identified. In the multivariable-adjusted models, a greater intake of fiber, carbohydrates from whole grains, and carbohydrates from non-starchy vegetables was significantly associated with a lower risk of T2D(highest vs. lowest quantile, HR [95% CI]=0.70 [0.62–0.79], 0.74 [0.67–0.82], and 0.83 [0.75–0.92], respectively, all P for trend <0.005). In contrast, a higher intake of starch and carbohydrate from starchy vegetables was associated with an increased risk of T2D(highest vs. lowest quantile, HR [95%CI]=1.31 [1.16–1.48] and 1.19 [1.09–1.31], respectively, both P for trend <0.005). Replacing one serving of refined grains or starchy vegetables with an equal amount of whole grains or non-starchy vegetables was associated with 4% to 10% lower risk of T2D(all P values <0.001).The observed associations were generally similar across population subgroups, including individuals with different genetic susceptibility to T2D. Mediation analyses of the inverse association between T

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