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废弃羽毛再生角蛋白纤维的制备及其性能研究

闽江学院学报 2024年第2期45卷 101-109页

作者：宋佳薇洪雨婷李威陈灵欣胡海阳米翔闽江学院服装与艺术工程学院福建福州350108 福建省新型功能性纺织纤维及材料重点实验室福建福州350108

将废弃羽毛中的角蛋白通过半胱氨酸还原法提取出来,采用湿法纺丝的方法将其制成再生角蛋白纤维,研究牵伸倍数对再生角蛋白纤维性能的影响。采用十二烷基硫酸钠-聚丙烯酰胺凝胶电泳、拉曼光谱、X射线衍射、扫描电子显微镜、全自动单纱强... 详细信息

将废弃羽毛中的角蛋白通过半胱氨酸还原法提取出来,采用湿法纺丝的方法将其制成再生角蛋白纤维,研究牵伸倍数对再生角蛋白纤维性能的影响。采用十二烷基硫酸钠-聚丙烯酰胺凝胶电泳、拉曼光谱、X射线衍射、扫描电子显微镜、全自动单纱强力机、热重分析仪测试等,对再生角蛋白纤维的结构、形貌、力学性能、热稳定性能等进行研究。结果表明,随着牵伸倍数的提高,再生角蛋白纤维的直径从31.8μm降至16.8μm,皮芯结构逐渐消失,牵伸倍数至3倍时皮芯结构完全消失;再生角蛋白纤维中二硫键的含量逐步增加,即交联程度逐步提高;再生角蛋白纤维的断裂伸长率和断裂强度均先增加再减小,在2.5倍和3倍时达到峰值,分别为5.49%和0.61 cN·dtex^(-1),再生角蛋白纤维的热稳定性优于天然羽毛。

关键词：再生角蛋白纤维二硫键湿法纺丝牵伸倍数

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羽毛角蛋白气凝胶的制备及染料吸附性能研究

闽江学院学报 2024年第2期45卷 110-118页

作者：张源林吴勇丽沈景行宋佳薇李威米翔闽江学院服装与艺术工程学院福建福州350108 福建省新型功能性纺织纤维及材料重点实验室福建福州350108

以还原法提取羽毛角蛋白的残渣为原料,以壳聚糖和纳米纤维素为增强改性材料,通过冷冻干燥法制备出可重复使用、吸附效率高、绿色环保的羽毛角蛋白气凝胶。采用扫描电子显微镜、热重分析仪和紫外分光度计对羽毛角蛋白气凝胶的形貌结构、... 详细信息

以还原法提取羽毛角蛋白的残渣为原料,以壳聚糖和纳米纤维素为增强改性材料,通过冷冻干燥法制备出可重复使用、吸附效率高、绿色环保的羽毛角蛋白气凝胶。采用扫描电子显微镜、热重分析仪和紫外分光度计对羽毛角蛋白气凝胶的形貌结构、热稳定性、吸附性能进行研究。研究结果表明,羽毛角蛋白气凝胶具有多孔的网状结构、良好的热稳定性和优异的染料吸附性能。在30 mL初始浓度400 mg·L^(-1)的酸性橙7染液中加入0.1 g羽毛角蛋白气凝胶,30℃条件下静置吸附24 h,酸性橙7染料的去除率达到99%。经过3次吸附-解吸附实验后,角蛋白气凝胶的吸附性能没有显著变化。

关键词：角蛋白气凝胶羽毛残渣酸性橙7 染料吸附吸附-解吸附

Mesothelin targeted nano-system enhanced chemodynamic therapy and tirapazamine chemotherapy via lactate depletion

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Nano Research 2023年第5期16卷 7108-7118页

作者： Guodong Cao Wei Cao jiawei Zhang Qing Chen Junjie Chen Qiang Chu Qiang Sun Maoming Xiong Bo Chen xiang Li Department of General Surgery The First Affiliated Hospital of Anhui Medical UniversityHefei 231300China Department of General Surgery The Second Affiliated Hospital of Zhejiang University Medical CollegeHangzhou 310027China State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Jiangsu Key Laboratory of Biological Cancer Cancer instituteXuzhou Medical UniversityXuzhou 221002China Department of surgery the People’s Hospital of Hanshan CountyMa’anshan 238101China

The enhanced permeability and retention(EPR)effect alone is not enough for nanoparticles to reach the *** of active and passive targeting may be an effective drug delivery *** ferric-tannic acid complex nanocapsules(HFe-TA)may effectively degrade and release Fe^(2+) ions,Fe^(2+)ions induce the production of·OH,however,the fenton reaction needs amount of H_(2)O_(2)to enhance chemodynamic *** to their deficiencies,such nanoparticles cannot realize intravenous drug ***,the mesothelin-targeted membrane(MTM)was constructed to realize accurate delivery nano-system,mesothelin antibody was expressed on the 293T cell membrane to prepare a *** oxidase(Lox)was loaded on HFe-TA to obtain Lox@***@HFe-TA was coated with MTM to develop the MTM ***(TPZ)therapy also requires hypoxia *** MTM nanosystem combined with TPZ can significantly kill tumour cells and inhibit metastasis in vivo and in *** also tested the biological safety of the *** this study,we overcame the EPR defects via the MTM nanosystem,which can realize acute targeted delivery to the tumour site,lactate depletion,promoted reactive oxygen species(ROS)induction,enhanced the effect of TPZ,demonstrating a potential synergistic combination of cancer therapy with better efficacy and biosafety.

关键词： mesothelin lactate oxidase tumor metastasis synergetic cancer therapy chemodynamic therapy

Carbonization fabrication of a piezoresistive sensor with improved sensitivity via Ni decoration of carbonized cotton fibers

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Science China(Technological Sciences) 2022年第12期65卷 3000-3009页

作者： HE xiang WANG FengMing LIANG YiYing WU jiawei LIANG JiongHong SHEN GengZhe LI BaiJun SU DaoJian ZHANG Chi SONG WeiDong HE Xin School of Applied Physics and Materials Wuyi UniversityJiangmen 529020China School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006China

The development of wearable electronics urgently requires the cost-effective and scalable fabrication of high-performance pressure *** work aims to develop a simple carbonization strategy to facilitate sensor sensitivity by decorating discrete nickel nanoparticles on carbonized cotton fibers(CCFs).The increased air gap between the fibers at the unloading state,as well as the enlargement of the deformation distance and the contact area between the conductive materials at the loading state,contribute to a more significant resistance ***,the sensitivity of the piezoresistive sensor is improved more than 5 times within 1 N by introducing Ni nanoparticles,and it is characterized by a rapid response(~160 ms)and recovery(~100 ms),wide detection range(~20 N/~130 kPa),and good durability(~4000 cycles).The flexible sensor has been successfully demonstrated to monitor human movements,physical stimuli,and pressure ***,the proposed device can control temperature accurately as a uniform and large-scale *** work reveals that the Ni@CCFs-based sensor is prospective in wearable electronics,artificial intelligence,health monitoring,medical diagnosis and treatment.

关键词： carbonized cotton fabric Ni nanoparticles flexible piezoresistive sensor wearable device

毫赫兹频段低噪声半导体泵浦驱动源设计与测试表征

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激光与光电子学进展 2024年第17期61卷 292-300页

作者：高子超李番李健博王嘉伟马正磊李响尚鑫田龙尹王保王雅君郑耀辉山西大学光电研究所量子光学与光量子器件国家重点实验室山西大学极端光学协同创新中心山西大学激光光谱研究所量子光学与光量子器件国家重点实验室

针对空间引力波探测中抑制毫赫兹频段激光强度噪声的需求，基于低噪声芯片，结合高稳定性电压基准源，设计相关外围电路，进行星载激光放大器中半导体激光泵浦驱动源的整体设计与研发，从时域及频域两方面对泵浦驱动源的工作性能进行评... 详细信息

针对空间引力波探测中抑制毫赫兹频段激光强度噪声的需求，基于低噪声芯片，结合高稳定性电压基准源，设计相关外围电路，进行星载激光放大器中半导体激光泵浦驱动源的整体设计与研发，从时域及频域两方面对泵浦驱动源的工作性能进行评估。实验结果表明：自研泵浦驱动源输出电流3.5 A时，在4 h内的电流时域抖动≤180μA；在频域方面，通过取样电阻将电流信号转化为电压信号，得到电压噪声谱密度低于1×10-4V/Hz1/2@0.1 m Hz和1×10-5V/Hz1/2@1 m Hz。所研发的泵浦源输出激光强度噪声在毫赫兹频段的相对电压噪声谱密度小于1×10-3Hz-1/2@（0.1 m Hz～1 Hz），为空间引力波探测中激光强度噪声抑制等方面提供关键器件及实验基础。

关键词：半导体泵浦驱动源毫赫兹频段噪声评估激光噪声抑制光电反馈控制

Recent progress in intermetallic nanocrystals for electrocatalysis:From binary to ternary to high-entropy intermetallics

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SmartMat 2023年第4期4卷 145-177页

作者： jiawei Liu Carmen Lee Yue Hu Zhishan Liang Rong Ji xiang Yun Debbie Soo Qiang Zhu Qingyu Yan School of Materials Science and Engineering Nanyang Technological UniversitySingaporeSingapore Institute of Materials Research and Engineering(IMRE) Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore

Developing sustainable and clean energy-conversion techniques is one of the strategies to simultaneously meet the global energy demand,save fossil fuels and protect the environment,in which nanocatalysts with high activity,selectivity and durability are of great *** nanocrystals,featuring their ordered atomic arrangements and predictable electronic structures,have been recognized as a type of active and durable catalysts in energy-related *** this minireview,the very recent progress in the syntheses and electrocatalytic applications of noble metal-based intermetallic nanocrystals is *** synthetic strategies,including the conventional thermal annealing approach and its diverse modifications,as well as the wet-chemical synthesis,for the construction of binary,ternary and high-entropy intermetallic nanocrystals have been discussed with representative examples,highlighting their strengths and ***,their electrocatalytic applications toward oxygen reduction reaction,small molecule oxidation reactions,hydrogen evolution reaction,CO_(2)/CO reduction reactions,and nitrogen reduction reaction are discussed,with the emphasis on how the ordered intermetallic structures contribute to the enhanced *** conclude the minireview by addressing the current challenges and opportunities of intermetallic nanocrystals in terms of syntheses and electrocatalytic applications.

关键词： binary intermetallic electrocatalysis high-entropy intermetallic intermetallic nanocrystals ternary intermetallic

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机器视觉结合深度学习对荔枝估产的算法研究

现代农业装备 2024年第1期45卷 53-58,70页

作者：高翔陈福展董力中卢嘉威李媛媛凡超陈万云广东省现代农业装备研究所广东广州510630 深圳市现代农业装备研究院广东深圳518022 广州市健坤网络科技发展有限公司广东广州510630 广东省农业科学院果树研究所广东广州510645

传统的荔枝估产算法为人工计数法,存在估产人力工作量大、效率低、误差高等问题。本文利用计算机视觉和深度学习等人工智能技术,首先搭建了基于YOLOv3算法的荔枝目标检测神经网络模型,预测图片中的果实数量并将其结果保存;然后搭建了ML... 详细信息

传统的荔枝估产算法为人工计数法,存在估产人力工作量大、效率低、误差高等问题。本文利用计算机视觉和深度学习等人工智能技术,首先搭建了基于YOLOv3算法的荔枝目标检测神经网络模型,预测图片中的果实数量并将其结果保存;然后搭建了MLP神经网络模型,将检测的果实数量作为网络输入,推理输出整棵树的产量估值;此外,为了进一步提高结果的准确性,本文通过双目视觉利用视差获得测量位置和荔枝树的距离深度信息,使用边缘检测得到树的外轮廓,得到荔枝树的树宽和树高,将其结果作为变量输入到MLP神经网络中;最后将识别模型部署到边缘端,通过边缘计算采集图像、进行图像推理与识别计算,最终实现荔枝估产,以改变传统人工荔枝估产方式,提升效率,为后续荔枝果园的精准管理打下基础。

关键词：荔枝估产边缘检测卷积神经网络迁移学习边缘计算

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Joint Modulations of Electromagnetic Waves and Digital Signals on a Single Metasurface Platform to Reach Programmable Wireless Communications

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Engineering 2022年第1期8卷 86-95页

作者： xiang Wan Chaokun Xiao He Huang Qiang Xiao Wei Xu Yueheng Li Joerg Eisenbeis jiawei Wang Ziai Huang Qiang Cheng Shi Jin Thomas Zwick Tiejun Cui State Key Laboratory of Millimeter Waves Southeast UniversityNanjing 210096China National Mobile Communications Research Lab Southeast UniversityNanjing 210096China Institute of Radio Frequency Engineering and Electronics(IHE) Karlsruhe Institute of Technology(KIT)Karlsruhe 76131Germany

In current wireless communication and electronic systems,digital signals and electromagnetic(EM)radiation are processed by different ***,we propose a mechanism to fuse the modulation of digital signals and the manipulation of EM radiation on a single programmable metasurface(PM).The PM consists of massive subwavelength-scale digital coding elements.A set of digital states of all elements forms simultaneous digital information roles for modulation and the wave-control sequence code of the *** designing digital coding sequences in the spatial and temporal domains,the digital information and farfield patterns of the PM can be programmed simultaneously and instantly in desired *** the experimental demonstration of the mechanism,we present a programmable wireless communication *** same system can realize transmissions of digital information in single-channel modes with beamsteerable capability and multichannel modes with multiple independent *** measured results show the excellent performance of the programmable *** work provides excellent prospects for applications in fifth-or sixth-generation wireless communications and modern intelligent platforms for unmanned aircrafts and vehicles.

关键词： Joint radar and communication Programmable metasurface Massive multiple-in and multiple-out

基于Lasso回归构建恙虫病合并脓毒症的列线图模型

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昆明医科大学学报 2024年第9期45卷 35-41页

作者：刘幸李畏娴朱翔刘梦醒李娜夏加伟张乐武彦李生浩云南省传染性疾病临床医学中心/昆明市第三人民医院药学部云南昆明650041

目的基于Lasso回归建立恙虫病合并脓毒症的列线图(Nomogram)模型,为恙虫病合并脓毒症的诊治提供参考。方法选取2012年6月至2023年12月昆明市第三人民医院收治的恙虫病患者作为研究对象(n=235),其中恙虫病合并脓毒症患者作为实验组(n=13... 详细信息

目的基于Lasso回归建立恙虫病合并脓毒症的列线图(Nomogram)模型,为恙虫病合并脓毒症的诊治提供参考。方法选取2012年6月至2023年12月昆明市第三人民医院收治的恙虫病患者作为研究对象(n=235),其中恙虫病合并脓毒症患者作为实验组(n=138),未合并脓毒症的恙虫病患者作为对照组(n=97),利用Lasso回归筛选恙虫病合并脓毒症的影响因素,并通过Logistic回归构建列线图模型,使用受试者工作特征(receiver operating characteristic,ROC)曲线和校准曲线进行模型的效能评价,并通过临床决策曲线(decision curve analysis,DCA)进行临床效用分析。结果通过Logistic回归的多因素分析结果显示:年龄(OR=1.039,95%CI:1.017~1.061)、PLT(OR=0.995,95%CI:0.990~1.000)、UA(OR=1.004,95%CI:1.001~1.008)、IgA(OR=0.680,95%CI:0.472~0.979)为恙虫病合并脓毒症的独立影响因素。ROC曲线下面积(area under the curve,AUC)为0.721(95%CI:0.656~0.786,P<0.001),模型的灵敏度为69.1%,特异度为63.1%。校准曲线提示该模型具有良好的一致性,临床决策曲线提示该模型具有较高的净收益值。结论恙虫病患者伴随年龄和UA水平的增高及PLT和IgA水平的降低,继发脓毒症的风险越高。

关键词：恙虫病脓毒症列线图模型