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Simultaneous Thermoluminescence and Thermally Stimulated Current in Polyamide

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Journal of Materials Science & Technology 1998年第4期14卷 357-360页

作者： Fan, Yong Wang, Xuan Zhang, Xiaohong lin, jiaqi Lei, Qingquan Harbin Univ Sci & Technol Dept Elect Mat Engn Harbin 150040 Peoples R China

The simultaneous thermoluminescence (TL) and thermally stimulated current (TSC) spectra were obtained in two types of polyamide film, such as nylons 6 and 11 under study of electron detrapping and recombination. There are three main relaxation peaks or regions, designated gamma , beta and alpha in order of increasing temperature in the TSC spectra, in contrast, a high temperature relaxation peak in TL spectra disappears. The centers of peaks of these relaxation regions are located at near 180, 230 and 310 K, respectively, deviating plus or minus 10 K. However, two anomalous phenomena were observed: firstly, a very large, short-circuited, thermally stimulated discharge current (TSDC) is up to 10** minus **8A, but reversible in direction for non-polarized nylons 6 and 11, even after several times repeatedly; secondly, there is no TL signal except for non-polarized nylon 6 film. (Edited author abstract) 11 Refs.

关键词： Polyamides

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鳜鱼生殖生长调控与良种培育技术研究进展

中山大学学报（自然科学版）（中英文） 2025年第1期64卷 116-124页

作者：刘士琰林嘉琪李美惠苏玉芹李水生李桂峰林浩然张勇中山大学生命科学学院/广东省水生经济动物良种繁育重点实验室广东广州510275

鳜鱼分布在东亚国家,是我国主要养殖淡水鱼类,具有重要的经济价值。近年来,随着全基因组测序的完成,鳜鱼生殖生长遗传基础被逐步揭示。研究人员在鳜鱼中开发了性别染色体分子标记,实现了性别控制育种;开展了细胞工程育种,获得多倍体鱼;... 详细信息

鳜鱼分布在东亚国家,是我国主要养殖淡水鱼类,具有重要的经济价值。近年来,随着全基因组测序的完成,鳜鱼生殖生长遗传基础被逐步揭示。研究人员在鳜鱼中开发了性别染色体分子标记,实现了性别控制育种;开展了细胞工程育种,获得多倍体鱼;进行生长选育和饲料驯化,培育出了多个鳜鱼优良新品种。本文结合自己研究团队的工作,对鳜鱼生殖生长调控机制和良种培育技术进行了总结整理,并讨论了遗传育种方法的应用现状,以期为鳜鱼乃至经济鱼类产业的发展提供方向和目标性思考。

关键词：鳜鱼性别决定生殖生长良种培育

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Ethylenediamine tetramethylenephosphonic acid boosting the electrocatalytic interface construct and proton transfer for high-temperature polymer electrolyte membrane fuel cells

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Journal of Energy Chemistry 2024年第12期99卷 159-164页

作者： Dongcai Zhang Yangyang Zhou Yanwei Zhu Shiqian Du Gen Huang jiaqi lin Peng Long Tehua Wang Li Tao Xian-Zhu Fu Shuangyin Wang College of Materials Science and Engineering.Shenzhen University Shenzhen 518060GuangdongChina State Key Laboratory of Chem/Bio-Sensing and Chemometrics Provincial Hunan Key Laboratory for Graphene Materials and DevicesCollege of Chemistry and Chemical Engineeringthe National Supercomputer Centers in ChangshaHunan UniversityChangsha 410082HunanChina Shenzhen Research Institute Hunan University Shenzhen 518000GuangdongChina College of Chemistry and Chemical Engineering Jiangxi Science and Technology Normnal UniversityNanchang 330013JiangxiChina

High-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) show excellent application prospects due to its enhanced tolerance of hydrogen ***,the sluggish electrode kinetics caused by its inefficient electrocatalytic interface and proton transfer severely restricts its *** overcome the sluggish electrode kinetics,the ethylenediamine tetramethylenephosphonic acid(EDTMPA) was successfully incorporated into the catalysts layer to regulate the phosphoric acid (PA) distribution to boost the electrocatalytic reaction interface and proton transfer,thus increasing the output power and stability of *** hydrophilic H_(2)PO_(4)^(-) and electron donor N atom of EDTMPA could efficiently decrease the absorption of PA on the catalyst surface and facilitate proton transportation in the membrane electrode,as demonstrated by our *** fuel cell assembled with the prepared membrane electrode shows a high reactivity of 1175 mW cm^(-2)and excellent stability,which is much better than the past reference *** results of this work provide new insights into the utilization of small molecules with phosphate groups to enhance phosphate tolerance and proton conduction,and there is also a further improvement in the reactivity,durability,and utilization of the electrocatalysts in HT-PEMFCs.

关键词： Fuel cells Electrocatalytic interface Electrocatalysts Activity Pt

Role of inflammation in neurological damage and regeneration following spinal cord injury and its therapeutic implications

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Burns & Trauma 2023年第1期11卷 62-71页

作者： Yan Jin Yixing Song jiaqi lin Tianqing Liu Guicai Li Biqin Lai Yun Gu Gang Chen lingyan Xing Key Laboratory of Neuroregeneration of Jiangsu and the Ministry of Education Co-innovation Center of Neurore-generationNMPA Key Laboratory for Research and Evaluation of Tissue Engineering Technology ProductsNantong UniversityNantong 226006China School of Life Sciences Nantong UniversityNantong 226019China School of Medicine Nantong UniversityNantong 226006China NICM Health Research Institute Western Sydney UniversityWestmeadNSW 2145Australia Key Laboratory for Stem Cells and Tissue Engineering(Sun Yat-sen University) Ministry of EducationGuangzhou 510275China Co-innovation Center of Neuroregeneration Nantong Univer-sityNantong 226006China

Spinal cord injury(SCI)is an incurable trauma that frequently results in partial or complete loss of motor and sensory *** neurons are damaged after the initial mechanical *** injuries,which are triggered by immunological and inflammatory responses,also result in neuronal loss and axon *** results in defects in the neural circuit and a deficiency in the processing of *** inflammatory responses are necessary for spinal cord recovery,conflicting evidence of their contributions to specific biological processes have made it difficult to define the specific role of inflammation in *** review summarizes our understanding of the complex role of inflammation in neural circuit events following SCI,such as cell death,axon regeneration and neural *** also review the drugs that regulate immune responses and inflammation in the treatment of SCI and discuss the roles of these drugs in the modulation of neural ***,we provide evidence about the critical role of inflammation in facilitating spinal cord neural circuit regeneration in zebrafish,an animal model with robust regenerative capacity,to provide insights into the regeneration of the mammalian central nervous system.

关键词： Inflammation Immune response Spinal cord injury Axon regeneration Cell death Zebrafish Inflammatory drugs Trauma Neurological damage

X-ray absorption investigation of the site occupancies of the copper element in nominal Cu_(3)Zn(OH)_(6)FBr

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Chinese Physics B 2021年第4期30卷 389-393页

作者： Ruitang Wang Xiaoting Li Xin Han jiaqi lin Yong Wang Tian Qian Hong Ding Youguo Shi Xuerong Liu Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China Shanghai Synchrotron Radiation Facility Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai 201800China Songshan Lake Materials Laboratory Dongguan 250100China

With Zn substitution to the three-dimensional antiferromagnetically ordered barlowite Cu_(4)(OH)_(6)FBr,Cu_(3)Zn(OH)_(6)FBr shows no magnetic phase transition down to 50 mK,and the system is suggested to be a two-dimensional kagomé quantum spin liquid[***.34077502(2017)].A key issue to identify such phase diagram is the exact chemical formula of the substituted *** Cu L-edge x-ray absorption spectrum(XAS)combined with the MultiX XAS calculations,we evaluate the Cu concentration in a nominal Cu_(3)Zn(OH)_(6)FBr *** results show that although the Cu concentration is 2.80,close to the expected value,there is 34%residual Cu occupation in intersite layers between kagomé *** the Zn substitution of the intersite layers is not complete,and likely it intrudes the kagomé layers.

关键词： x-ray absorption spectrum barlowite spin liquid candidate chemical occupations

Hydrogel electrodes with conductive and substrate-adhesive layers for noninvasive long-term EEG acquisition

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Microsystems & Nanoengineering 2023年第3期9卷 357-370页

作者： Hailing Xue Dongyang Wang Mingyan Jin Hanbing Gao Xuhui Wang Long Xia Dong’ang Li Kai Sun Huanan Wang Xufeng Dong Chi Zhang Fengyu Cong jiaqi lin Key State Laboratory of Fine Chemicals School of BioengineeringDalian University of Technology116024 DalianChina School of Biomedical Engineering Faculty of Electronic Information and Electrical EngineeringDalian University of Technology116024 DalianChina Key Laboratory of Energy Materials and School of Materials Science and Engineering Dalian University of Technology116024 DalianChina

Noninvasive brain–computer interfaces (BCIs) show great potential in applications including sleep monitoring, fatigue alerts, neurofeedback training, etc. While noninvasive BCIs do not impose any procedural risk to users (as opposed to invasive BCIs), the acquisition of high-quality electroencephalograms (EEGs) in the long term has been challenging due to the limitations of current electrodes. Herein, we developed a semidry double-layer hydrogel electrode that not only records EEG signals at a resolution comparable to that of wet electrodes but is also able to withstand up to 12 h of continuous EEG acquisition. The electrode comprises dual hydrogel layers: a conductive layer that features high conductivity, low skin-contact impedance, and high robustness;and an adhesive layer that can bond to glass or plastic substrates to reduce motion artifacts in wearing conditions. Water retention in the hydrogel is stable, and the measured skin-contact impedance of the hydrogel electrode is comparable to that of wet electrodes (conductive paste) and drastically lower than that of dry electrodes (metal pin). Cytotoxicity and skin irritation tests show that the hydrogel electrode has excellent biocompatibility. Finally, the developed hydrogel electrode was evaluated in both N170 and P300 event-related potential (ERP) tests on human volunteers. The hydrogel electrode captured the expected ERP waveforms in both the N170 and P300 tests, showing similarities in the waveforms generated by wet electrodes. In contrast, dry electrodes fail to detect the triggered potential due to low signal quality. In addition, our hydrogel electrode can acquire EEG for up to 12 h and is ready for recycled use (7-day tests). Altogether, the results suggest that our semidry double-layer hydrogel electrodes are able to detect ERPs in the long term in an easy-to-use fashion, potentially opening up numerous applications in real-life scenarios for noninvasive BCI.

关键词： conductive electrode impedance

Advanced materials for the delivery of vaccines for infectious diseases

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Biosafety and Health 2022年第2期4卷 95-104页

作者： Wei Li Junli Meng Xinghuan Ma jiaqi lin Xueguang Lu Beijing National Laboratory for Molecular Sciences Key Laboratory of ColloidInterface and Chemical ThermodynamicsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China School of Chemical Sciences University of Chinese Academy of SciencesBeijing 100049China Key State Laboratory of Fine Chemicals School of BioengineeringDalian University of TechnologyDalian 116024China

Infectious diseases are an increasing threat to global *** is the most effective and costefficient method for preventing and controlling infectious *** development of new vaccines is inextricably linked to the advancement of materials that serve as essential components of vaccines,such as antigens,adjuvants,and their *** physicochemical and biological properties of vaccines-such as the kinetics of antigen retention and presentation-are determined by the material compositions of vaccines and carriers,affecting the overall *** sustained release of antigens prolongs their retention time in germinal centers and improves humoral immune *** release that imitates clinical dosing regimens can improve patient adherence to vaccination,affording increased vaccine ***,we review progress of materials innovation on altering vaccine release kinetics,which affects the overall vaccine efficacy,safety,and compliance.

关键词： Infectious disease Vaccine Biosafety material Vaccine delivery Release kinetics

Surface decoration prompting the decontamination of active sites in high-temperature proton exchange membrane fuel cells

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Chinese Chemical Letters 2024年第11期35卷 549-553页

作者： jiaqi lin Pupu Yang Yimin Jiang Shiqian Du Dongcai Zhang Gen Huang Jinbo Wang Jun Wang Qie Liu Miaoyu Li Yujie Wu Peng Long Yangyang Zhou Li Tao Shuangyin Wang Research Institute of Hunan University in Chongqing Chongqing 401120China College of Chemistry and Chemical Engineering Jiangxi Science and Technology Normal UniversityNanchang 330013China KBC Hydrogen Energy Technology Co. Ltd.Yiyang 413100China

In electrochemical energy devices,the operating conditions always exert enormous influence on electrocatalysts'*** acid(PA),acted as the proton carriers,can be adsorbed on Pt surface,block active sites and affect the electronic structure of Pt unfavorably,which severely restricts the performance of high-temperature proton exchange membrane fuel cells(HT-PEMFCs).Herein,simply basic organic compounds,such as dicyandiamide(DCD),melamine(Mel)and cyanuric acid(CA),are decorated on Pt surface(DCD-Pt/C,Mel-Pt/C and CA-Pt/C)to induce the adsorption transfer of proton *** decoration can not only inject electrons to Pt and enhance oxygen reduction reaction(ORR)activity but also can induce PA to transfer from Pt surface to organic compounds,decontaminating active *** addition,the organic compounds with the larger conjugated system and the smaller electronegativity of ligating atoms would have a greater interaction with Pt,causing a larger decoration amount on Pt surface,which leads to more excellent ORR activity and resistance to PA blockage ***,MelPt/C shows a peak power density of 629 mW/cm^(2),exceeding commercial Pt/C(437 mW/cm^(2)),DCD-Pt/C(539 m W/cm^(2))and CA-Pt/C(511 mW/cm^(2))with the same loading.

关键词： High-temperature proton exchange membrane fuel cells Decontamination of active sites Oxygen reduction reaction Surface decoration Adsorption transfer

Corneal Topography Research of Myopia in Chinese

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Eye Science 1996年第3期16卷 163-165页

作者： Yuesheng lin, jiaqi Chen, Zheng Wang, Zuguo Liu, Jianfuan XuanZhongshan Ophthalmic Center, Sun Yat-sen University of Medical Sciences, Guangzhou 510060, China Zhongshan Ophthalmic Center Sun Yat-sen University of Medical Sciences Guangzhou China.

Purpose: To determine corneal topography parameters of myopia in Chinese and help for studies of causes of myopia, distingiush other corneal diseases (such as early keratoconus), further explore the accurateness and safeness of the clinical effects of radii keratotomy(RK) or photorefractive keratectomy (PRK). Methods: Fifty-eight eyes with mild or moderate myopia were examined by computer-assisted photokeratography. (TMS-1 Computed Anatomy Inc. New York. NY)Results: The corneal topography of most (68%) of the examined eyes showed symmetric bowtie pattern; the corneal surface of most (75%) of the examined eyes showed positive aspheric shape (steeper centrally, flatter peripherally); the refractive power of central cornea is at mean 44. 165 ± 1. 429D; the refractive difference between 1 to 25 ring in keratoscpe was at mean 1. 655 ± 0. 785D; the mean SRI was 0. 558 ± 0. 768, the mean SAI was 0. 296 ± 0. 149; the mean Smik was 44. 209±1. 515D. The apex and visual axis were dislocation in all the

关键词： myopia refraction topography