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Modification strategies for non-aqueous, highly proton-conductive benzimidazole-based high-temperature proton exchange membranes

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Chinese Chemical Letters 2024年第4期35卷 43-51页

作者： Yunfa Dong Shijie Zhong Yuhui He Zhezhi Liu Shengyu Zhou Qun Li Yashuai Pang Haodong Xie Yuanpeng Ji Yuanpeng Liu Jiecai Han weidong He National Key Laboratory of Science and Technology on Advanced Composites in Special Environments and Center for Composite Materials and StructuresHarbin Institute of TechnologyHarbin 150080China School of Petroleum Engineering Chongqing University of Science and TechnologyChongqing 401331China School of Physics University of Electronic Science and Technology of ChinaChengdu 610054China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001China Chongqing Research Institute Harbin Institute of TechnologyChongqing 401151China School of Mechanical Engineering Chengdu UniversityChengdu 610106China

High-temperature proton exchange membranes(HT-PEMs) possess excellent thermal and outstanding electrochemical stability, providing an avenue to realize high-temperature proton exchange membranes fuel cells(HT-PEMFCs) with both superior power density and long-term durability. Unfortunately, polybenzimidazole(PBI), a typical material for conventional HT-PEMs, fails to compromise the high nonaqueous proton conductivity and high mechanical properties, thus hindering their practical *** efficient nonaqueous proton conduction is crucial for HT-PEMFC, and many insightful research works have been done in this area. However, there still lacks a report that integrates the host-guest interactions of phosphoric acid doping and the structural stability of polymers to systematically illustrate modification strategies. Here, we summarize recent advancements in enhancing the nonaqueous proton conduction of HT-PEMs. Various polymer structure modification strategies, including main chain and side group modification, cross-linking, blocking, and branching, are reviewed. Composite approaches of polymer, including compounding with organic porous polymers, filling the inorganic components and modifying with ionic liquids, etc., are also covered in this work. These strategies endow the HT-PEMs with more free volume, nanophase-separated structure, and multi-stage proton transfer channels, which can facilitate the proton transportation and improve their performance. Finally, current challenges and future directions for further enhancements are also outlined.

关键词： Benzimidazole Nonaqueous proton conduction Free volume Nanophase-separated structure Structure modification

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Beyond 600G fiber-THz wireless seamless integration system employing cascaded MIMO equalizers

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Science China(Technological Sciences) 2024年第7期67卷 2274-2276页

作者： DING JunJie TONG weidong LI XinTong ZHANG Zheng ZHANG Jiao CAI YuanCheng LEI MingZheng HUA BingChang CHEN XingYu YU JianJun ZHU Min Purple Mountain Laboratories Nanjing 211111China National Mobile Communications Research Laboratory Southeast UniversityNanjing 210096China Fudan University Shanghai 200433China

Terahertz(THz)-wave communication, with sufficient spectrum resources(0.3 THz~10 THz), can meet the needs of future 6G large-capacity mobile communication services[1-9]. Recently, the seamless integration of existing ... 详细信息

关键词： communication fiber wireless

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Chinese dwarf cherry [Cerasus humilis(Bge.) Sok.] polyphenol extract promotes osteoblastic differentiation in MC3T3-E1 cells and reduce ovariectomy-induced bone loss in rats via the calcium/AMPK signaling pathway

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Food Science and Human Wellness 2024年

作者： Yushi Zhang Qingyu Cui Lixin Wang Xiaoxue Wang Shupeng Liu Rong Zeng weidong Li School of Chinese Materia Medica， Beijing University of Chinese Medicine Qingdao Histep Health Technology Ltd. Department of Cardiology， Beijing Anzhen Hospital， Capital Medical University

Chinese dwarf cherry (Cerasus humilis) is a fruit unique to China， which is considered to have osteoprotective effects. However， no systematic experimental characterization was available. In this study， the osteoprotective activity and mechanism of Chinese dwarf cherry polyphenol extract (OPE) was studied. In vitro， OPE stimulated the alkaline phosphatase activity in the early differentiation stage， increased the osteocalcin level in the middle differentiation stage， and induced the formation of more bone-mineralized nodules in the late osteogenic stage. In vivo， OPE improved cancellous bone structure and maximum load of the femur in ovariectomized (OVX) rats. The balance between bone formation and resorption was regulated. Oxidative stress levels in the peripheral blood， liver and femur were reduced. OPE alleviated the disturbance in energy metabolism， muscle development， and muscle regulation-related signaling pathways caused by OVX and activated the calcium/adenosine monophosphate-activated protein kinase signaling pathway. Therefore， OPE is a potential dietary supplement for the prevention and treatment of osteoporosis.

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Molecular characterization of canine parvovirus type 2(CPV2)reveals a high prevalence of the CPV2c genotype among dogs sufering from diarrhea

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Animal Diseases 2024年第3期4卷 198-206页

作者： Sajid Umar Di Gao Semin Kim Yixi Cheng Zhenkun Fang Qiu Zhongqi weidong Yu Benjamin D.Anderson Global Health Research center(GHRC) Duke Kunshan UniversityKunshanChina Division of Natural&Applied Sciences(DNAS) Duke Kunshan UniversityKunshanChina Swine Business Unit MSD Animal HealthShanghaiChina Simba Pet Hospital(Tinglin Park Branch) Maanshan RoadKunshanSuzhou 215335Jiangsu ProvinceChina Play Pi Kangkang Pet Hospital Kunshan City Development ZoneKunshanSuzhou 215300Jiangsu ProvinceChina Department of Environmental and Global Health College of Public Health and Health ProfessionsUniversity of FloridaFloridaUSA

Canine parvovirus 2(CPV-2)is a highly contagious virus in dogs that typically causes hemorrhagic enteritis and a high mortality rate in unvaccinated *** genetic variability and antigenic diversity of CPV-2 hinder its efective prevention of infection by *** investigate the epidemiology and genetic characteristics of CPV-2 in China,rectal swabs from afected dogs were collected from diferent animal clinics in Kunshan from 2022 to *** detection and capsid gene sequencing of CPV-2 were performed using previously described primers and *** overall detection rate for CPV-2 was 16.5%(33/200).A signifcant association was found between the CPV-2-positivity and clinical signs,age,breed and vaccination *** analysis revealed the presence of CPV-2c genotypes in all positive samples,which were genetically similar to other Asian CPV-2c ***,four key mutations(A5G,F267Y,Y324I and Q370R)were detected in all isolates,and one novel mutation(I447M)was detected in three CPV-2 *** mutations in the CPV-2 strains could impact vaccine efcacy and the efectiveness of the virus immune ***,no recombination events were observed between the identifed CPV-2c strains and reference strains from *** data revealed that amino acid residues 324,426 and 440 of VP2 may under strong selection *** pattern of genetic variation in the CPV-2 lineage warrants continuous laboratory-based surveillance programs in other parts of China to better understand the pattern of seasonal distribution and association between emerging genotypes and the intensity of disease severity.

关键词： Canine parvovirus Dogs Epidemiology Genetic diversity Phylogenetic analysis

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Effects of Curcumin on Neuroinflammation and the Nrf2/HO-1 Pathway in Rat Brains Following Gas Explosion

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Biomedical and Environmental Sciences 2024年第8期37卷 943-947页

作者： Xinwen Dong Yaguang Su Zheng Luo Lyufei Deng Xiaofeng Han Yifang Liang Sanqiao Yao weidong Wu Jia Cao Linqiang Tian Yichun Bai Wenjie Ren Health School of Public Health Xinxiang Medical UniversityXinxiang 453003HenanChina Toxicology Research Institute PLA Army Medical UniversityChongqing 400038China Institute of Trauma and Orthopaedics Xinxiang Medical UniversityXinxiang 453003HenanChina Institutes of Health central Plains Xinxiang Medical UniversityXinxiang 453003HenanChina

Gas explosions,a major occupational hazard in China’s coal industry,endanger the lives and health of *** explosions cause a specific type of traumatic brain injury with complex mechanisms,leading to disability and death.A study by Zhao et *** magnetic resonance imaging on 49 gas explosion survivors revealed significant damage to brain regions like the hippocampus and cerebral cortex.

关键词： damage Nrf2 cerebral

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数据与算法驱动的中国司法现代化

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中国法律评论 2024年第4期 87-101页

作者：季卫东上海交通大学上海交通大学中国法与社会研究院上海交通大学人工智能治理与法律研究中心

本文以中国司法现代化进程中出现的“两超怪圈”为切口,以算法利维坦与数字怪兽们的博弈为问题状况,以司法的概念计算公式和数据计算公式为两个基本点,考察了数字化为现代化另辟蹊径的原理以及智慧法院的四个一体化平台的操作机制。基... 详细信息

本文以中国司法现代化进程中出现的“两超怪圈”为切口,以算法利维坦与数字怪兽们的博弈为问题状况,以司法的概念计算公式和数据计算公式为两个基本点,考察了数字化为现代化另辟蹊径的原理以及智慧法院的四个一体化平台的操作机制。基于人工智能赋能法官个体、通过大数据分析进行类案的自动识别和推送、庭审场景敞视化、跨领域信息分享的网络查控系统、司法行政的目标管理和指标评估等现象的深度分析,阐明了数据和算法对审判独立、正当程序、司法公开、办案效率等现代法治原则实施的积极作用以及各种潜在的风险,并从人机共存、规范多元的现实出发,特别强调法律—技术程序的不同组合及其优选的重要意义。

关键词：算法利维坦数字人权司法现代化审判范式智慧法院技术性程序公正

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清代沿边藩部的审级变动考察——以乾隆朝准格尔旗为中心

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中国边疆史地研究 2024年第1期34卷 144-153,216页

作者：刘维栋山西师范大学历史与旅游文化学院太原市030031

清前期准格尔旗内部案件的审级为旗、多旗会审、理藩院三级,其中会盟审理与多旗会审并行,乾隆朝多旗会审与会盟审理的形式被盟长审理所取代。对于蒙古与民人交涉案件,清朝通过增设行政建置的方式,形成了神木理事司员、神木同知、托克托... 详细信息

清前期准格尔旗内部案件的审级为旗、多旗会审、理藩院三级,其中会盟审理与多旗会审并行,乾隆朝多旗会审与会盟审理的形式被盟长审理所取代。对于蒙古与民人交涉案件,清朝通过增设行政建置的方式,形成了神木理事司员、神木同知、托克托通判、地方州县分辖并对应不同审级的司法体系。在乾隆朝理藩院题本所示的司法实践中,神木理事司员在蒙古与民人交涉及蒙旗内部刑事重案中所扮演的角色并不相同,形成了旗(县)、三堂会审、理藩院三层审级。审级的确立与变革,是清朝治理蒙古二元管理体制的突破,也是准格尔旗在司法领域对清代藩部地区政治内地化与一体化趋势的因应。

关键词：乾隆准格尔旗司法审判审级变化

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Mechanisms of Dangua Fang(丹瓜方)in multi-target and multi-method regulation of glycolipid metabolism based on phosphoproteomics

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Journal of Traditional Chinese Medicine 2024年第2期44卷 334-344页

作者： HENG Xianpei WANG Zhita LI Liang YANG Liuqing HUANG Suping JIN Lang HE weidong Department of Endocrinology People's Hospital Affiliated to Fujian University of Traditional Chinese MedicineFuzhou 350004China Academy of Integrative Medicine Fujian University of Traditional Chinese MedicineFuzhou 350122China Faculty of Humanities and Management Fujian University of Traditional Chinese MedicineFuzhou 350122China Department of Geriatrics People's Hospital Affiliated to Fujian University of Traditional Chinese MedicineFuzhou 350004China

OBJECTIVE:To explore the mechanism of Dangua Fang(丹瓜方,DGR)in multi-target and multi-method regulation of glycolipid metabolism based on ***:Sprague-Dawley rats with normal glucose levels were randomly divided into three groups,including a conventional diet control group(Group A),high-fat-highsugar diet model group(Group B),and DGR group(Group C,high-fat-high-sugar diet containing 20.5 g DGR).After 10 weeks of intervention,the fasting blood glucose(FBG),2 h blood glucose[PBG;using the oral glucose tolerance test(OGTT)],hemoglobin A1c(HbA1c),plasma total cholesterol(TC),and triglycerides(TG)were tested,and the livers of rats were removed to calculate the liver ***,hepatic portal TG were tested using the Gross permanent optimization-participatiory action planning enzymatic method and phosphoproteomics was performed using liquid chromatography with tandem mass spectrometry(LC-MS/MS)analysis followed by database search and bioinformatics ***,cell experiments were used to verify the results of *** mitogen-activated protein kinase kinase kinase kinase 4(MAP4k4)and phosphorylated adducin 1(ADD1)were detected using western ***:DGR effectively reduced PBG,TG,and the liver index(P1.2),DGR upregulated the modification of 228 phosphorylation sites involving 204 corresponding function proteins,and downregulated the modification of 358 phosphorylation sites involving 358 corresponding function proteins,which includ

关键词： phosphoproteomics glycolipid metabolism therapeutic mechanism compound formula Dangua Fang

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Effects of β-Glucan Supplementation on Repairing of Phenol-Induced Vaginal Mucosal Epithelium Damage in Rats

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Open Journal of Obstetrics and Gynecology 2024年第4期14卷 535-546页

作者： Song Fei weidong Wu Ying Wang Dan Li Bo Jin Department of Thoracic and Cardiovascular Surgery Guangzhou Red Cross Hospital of Jinan University Guangzhou China Guangzhou Xiaomanyao Medical Equipment Co. Ltd. Guangzhou China

Objective: To investigate the effects of different concentrations of β-glucan on the repair of damaged vaginal mucosa, the expression of vascular endothelial growth factor (VEGF), and the inflammatory factor-6 (IL-6) in vaginal tissues. Methods: Thirty-six adult female specific pathogen free (SPF)-grade Wistar rats were randomly divided into 3 phase groups with 12 rats each. Vaginal inflammation rat models were established by injecting phenol gel into the vagina of each rat at a dose of 0.1 ml/100g body weight. After modeling, rats were divided into 4 groups based on different concentrations of the test agent. The control group was injected with 0.5 ml of saline, experimental group A was injected with 0.375 ml saline 0.125 ml β-glucan, experimental group B was injected with 0.25 ml saline 0.25 ml β-glucan, and experimental group C was injected with 0.50 ml β-glucan. The injection sites were selected at the 3 o’clock and 9 o’clock positions of the vagina. Rats were sacrificed at 7-, 14-, and 28-days post-injection, and tissue samples were collected from the injection sites and prepared for histological analysis. New blood vessels and fibroblast numbers in the tissues were observed after Hematoxylin-eosin (HE) staining. The expression levels of VEGF and IL-6 in the tissues were measured using quantificational reverse transcription polymerase chain reaction (qRT-PCR). Results: Histological examination of vaginal tissue specimens at 7-, 14-, and 28-days post-injection showed that on day 7, there were no significant changes in the experimental groups compared to the control group. However, on days 14 and 28, the experimental groups showed more new blood vessels, macrophages, and fibroblasts with increased activity compared to the control group. The expression levels of VEGF in vaginal tissues were elevated on days 14 and 28 in the experimental groups. The comparison of IL-6 levels in vaginal tissues on day 28 showed that serum IL-6 levels returned to normal, and there wa

关键词： β-Glucan Vaginal Mucosa Damage Repair

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大扰动下电力系统惯性时空分布特性的表征形式初探

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中国电机工程学报 2024年第12期44卷 4601-4614,I0002页

作者：李卫东丁奇力大连理工大学电气工程学院辽宁省大连市116024

已有关于系统惯性时空分布(spatial-temporal distribution of system inertia,SDSI)的研究大多聚焦于惯量估计,而对其概念的表征并不统一,也缺乏对其性质的深入剖析与相关概念的系统梳理与辨析。该文试图探索大扰动下系统惯性时空分布... 详细信息

已有关于系统惯性时空分布(spatial-temporal distribution of system inertia,SDSI)的研究大多聚焦于惯量估计,而对其概念的表征并不统一,也缺乏对其性质的深入剖析与相关概念的系统梳理与辨析。该文试图探索大扰动下系统惯性时空分布特性的表征形式。基于频率动态过程分析剖析了惯性时空分布特性,提出系统节点惯量概念并给出该参量的性质描述参量,基于惯性物理机理提出了这些参量的量化分析方法并推导了相关系数的差分计算公式。仿真算例验证了对系统惯性时空分布特性所做的分析与判断,利用所提出的表征形式可全面而规范地表征系统惯性时空分布特征。研究可为电力系统惯性时空分布特性表征体系的构建提供参考。

关键词：电力系统系统惯性时空分布特性表征形式系统节点惯量

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