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硫醇吸附挥发性有机气体(VOCs)的气敏机理 被引量:1
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作者 张海燕 李琦 +2 位作者 王梓臻 文豪 刘丹凤 《原子与分子物理学报》 CAS 北大核心 2025年第3期35-44,共10页
化学电阻气体传感器对于空气质量、食品检测和人体呼吸有着重要作用.传感器上修饰物硫醇与待测的VOCs之间吸附的气敏机理分析是选择硫醇、预测吸附能力与特异性的重要手段.本文选取了11-巯基-1-十一醇(MUD)和4-甲氧基苄硫醇(MTT)两种常... 化学电阻气体传感器对于空气质量、食品检测和人体呼吸有着重要作用.传感器上修饰物硫醇与待测的VOCs之间吸附的气敏机理分析是选择硫醇、预测吸附能力与特异性的重要手段.本文选取了11-巯基-1-十一醇(MUD)和4-甲氧基苄硫醇(MTT)两种常见的硫醇与六种典型的VOCs(乙醇ETN、异丙醇IPA、丙酮ACN、正己烷HXN、甲苯TLN、苯甲醛BND),基于密度泛函理论(DFT),计算其表面静电势(ESP)并建立气体吸附模型.在气体吸附模型的基础上计算其吸附能,并分析其弱相互作用,从微观角度解释气体吸附的作用机理.实验结果表明,具有羟基的MUD分子对同样有羟基的气体(如ETN、IPA)能够以氢键的方式吸附,具有较强的选择效果;具有苯环的MTT分子与具有苯环结构的气体分子(如TLN、BND)吸附时会在苯环之间形成π-π堆积,基于色散作用进行吸附,这表明MTT分子对具有苯环结构的气体有着较强的吸附作用.研究发现其色散作用吸附的强弱与分子的表面ESP绝对值有关.本文对于传感器表面修饰物吸附气体的气敏机理进行了探究,并对表面修饰物的选择和实验结果预测提供了理论指导. 展开更多
关键词 硫醇 VOCS DFT 表面静电势 气体吸附模型 弱相互作用分析
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电针干预脑缺血再灌注模型大鼠的神经保护机制
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作者 吴海洋 段冕 +5 位作者 李成龙 张君宇 计海生 王海涛 茅伟 王颖 《中国组织工程研究》 CAS 北大核心 2025年第18期3811-3818,共8页
背景:前期研究表明,针刺督脉治疗缺血性脑卒中的疗效确切,可通过减轻细胞焦亡改善脑缺血再灌注损伤,但上游调控机制尚不完全明确。目的:分析电针对脑缺血再灌注损伤模型大鼠的脑保护作用机制。方法:采用随机数字表法将27只SD大鼠随机分... 背景:前期研究表明,针刺督脉治疗缺血性脑卒中的疗效确切,可通过减轻细胞焦亡改善脑缺血再灌注损伤,但上游调控机制尚不完全明确。目的:分析电针对脑缺血再灌注损伤模型大鼠的脑保护作用机制。方法:采用随机数字表法将27只SD大鼠随机分为假手术组、模型组和电针组,每组9只。取模型组和电针组大鼠,采用改良线栓法建立脑缺血再灌注损伤模型,验证造模成功后,对电针组大鼠施予电针干预,选取百会、风府、大椎3个穴位,1次/d,20 min/次,连续干预7 d。电针干预结束后,利用神经功能缺损评分、爬杆实验评估大鼠行为学改变,TTC染色评估大鼠脑梗死体积,苏木精-伊红染色观察大鼠梗死侧脑皮质组织形态学变化,免疫荧光染色分析梗死侧脑皮质中Iba-1及活性氧表达,ELISA法检测梗死侧脑皮质组织中白细胞介素1β、白细胞介素6和肿瘤坏死因子α水平,RT-qPCR及Western blot检测大鼠梗死侧脑皮质组织中硫氧还蛋白互作蛋白、NLRP3、Caspase-1、白细胞介素1β的mRNA和蛋白表达,免疫共沉淀法分析大鼠梗死侧脑皮质组织中硫氧还蛋白互作蛋白与NLRP3的相互作用。结果与结论:①与假手术组比较,模型组大鼠神经功能缺损评分、爬杆实验评分及脑梗死体积均升高(P<0.05),Iba-1、活性氧免疫荧光表达增强(P<0.05),白细胞介素1β、白细胞介素6、肿瘤坏死因子α水平均升高(P<0.05),硫氧还蛋白互作蛋白、NLRP3、Caspase-1、白细胞介素1β的mRNA和蛋白表达均升高(P<0.05),苏木精-伊红染色显示模型组大鼠梗死侧脑皮质神经元变性坏死,细胞核出现碎裂溶解及细胞空泡现象;②与模型组比较,电针组大鼠神经功能缺损评分、爬杆实验评分及脑梗死体积均降低(P<0.05),Iba-1、活性氧免疫荧光表达减弱(P<0.05),白细胞介素1β、白细胞介素6、肿瘤坏死因子α水平均降低(P<0.05),硫氧还蛋白互作蛋白、NLRP3、Caspase-1、白细胞介素1β的mRNA和蛋白表达均降低(P<0.05),苏木精-伊红染色显示电针组大鼠梗死侧脑皮质神经元病理学损伤明显减轻,细胞坏死及空泡现象明显减少;③免疫共沉淀检测显示,模型组大鼠梗死侧脑皮质组织中硫氧还蛋白互作蛋白与NLRP3存在相互作用;④结果表明,电针干预可能通过抑制活性氧/硫氧还蛋白互作蛋白/NLRP3细胞焦亡信号通路及小胶质细胞的活化来减少炎症因子释放,进而发挥抗脑缺血再灌注损伤作用。 展开更多
关键词 脑缺血再灌注损伤 电针 NLRP3 活性氧 硫氧还蛋白互作蛋白 小胶质细胞
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元宇宙服务的人机交互综述
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作者 高俊涛 程玉玉 《郑州大学学报(理学版)》 CAS 北大核心 2025年第1期8-14,共7页
近年来,元宇宙飞速发展,已成为未来数字世界的一个重要发展方向。元宇宙中的人机交互是实现虚实融合的核心,其解决了元宇宙中的多用户协作、沟通、社交等挑战,促进了创新和合作。为了深入探讨元宇宙作为虚拟和现实世界融合的数字化空间... 近年来,元宇宙飞速发展,已成为未来数字世界的一个重要发展方向。元宇宙中的人机交互是实现虚实融合的核心,其解决了元宇宙中的多用户协作、沟通、社交等挑战,促进了创新和合作。为了深入探讨元宇宙作为虚拟和现实世界融合的数字化空间,其服务如何与人机交互相结合,创造出丰富、沉浸式、个性化的用户体验,调研了元宇宙和人机交互技术,并从人机交互的角度对元宇宙的概念进行了定义。讨论了元宇宙服务和人机融合的可行性与优势,并整理归纳了现有的挑战。最后探讨了元宇宙服务的未来发展趋势。 展开更多
关键词 元宇宙 服务 人机交互 数字化空间
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乡村旅游发展中的生态系统文化服务功能研究——以安徽肥东黄张村为例
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作者 王军 王国聘 《四川旅游学院学报》 2025年第1期70-76,共7页
探究与发挥乡村旅游的生态系统文化服务功能及其作用机制,是推进乡村旅游高质量发展,实现乡村振兴的重要路径。以安徽省肥东县黄张村为例,运用文献分析、实地调研、参与式观察、半结构化访谈方法和复合生态系统理论,揭示乡村旅游开发与... 探究与发挥乡村旅游的生态系统文化服务功能及其作用机制,是推进乡村旅游高质量发展,实现乡村振兴的重要路径。以安徽省肥东县黄张村为例,运用文献分析、实地调研、参与式观察、半结构化访谈方法和复合生态系统理论,揭示乡村旅游开发与生态系统文化服务功能的耦合关系与互动机制。研究认为:乡村旅游开发与乡村生态系统文化服务间的耦合关系为“发展动力—价值感知—耦合协调—复合增益”,生态系统文化服务功能渗透于乡村旅游空间生产并促进乡村“社会空间—生态空间—文化空间”三种类型空间演化,乡村生态系统文化服务价值在乡村旅游发展中被游客和居民感知并被开发与利用,在实现农民增收和壮大乡村富民产业,提升乡村产业发展水平中发挥重要作用。黄张村旅游发展中生态系统文化服务表现出色,生态系统文化服务功能有效发挥,推动了乡村旅游高质量发展。 展开更多
关键词 乡村旅游 生态系统文化服务 互动机理 功能 黄张村
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铀对α-Al_(2)O_(3)中氢与本征点缺陷相互作用的影响
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作者 杨飞龙 向鑫 +2 位作者 胡立 张桂凯 陈长安 《原子与分子物理学报》 CAS 北大核心 2025年第5期123-129,共7页
在长期高温服役过程中,铀床的氚渗透泄露问题是聚变堆涉氚系统中需要关注的焦点之一,而一种行之有效的解决思路是在内壁制备阻氚涂层.然而,服役过程中通过热扩散渗入涂层内部的铀可能在阻氚涂层氢行为中起作用,进而影响其服役可靠性.基... 在长期高温服役过程中,铀床的氚渗透泄露问题是聚变堆涉氚系统中需要关注的焦点之一,而一种行之有效的解决思路是在内壁制备阻氚涂层.然而,服役过程中通过热扩散渗入涂层内部的铀可能在阻氚涂层氢行为中起作用,进而影响其服役可靠性.基于此,采用第一性原理计算方法,研究了铀对α-Al_(2)O_(3)中氢与本征点缺陷相互作用的影响.结果发现,铀对α-Al_(2)O_(3)中空位型本征点缺陷及氢相关缺陷的存在形式、电荷态及相对稳定性有重要影响.从形成能观点来看,铀对α-Al_(2)O_(3)中空位型本征点缺陷及氢相关缺陷的形成有利,且α-Al_(2)O_(3)中空位型点缺陷对氢的捕陷能力因铀的引入显著增加.研究结果对α-Al_(2)O_(3)基内壁阻氚涂层在氚工艺系统铀床中应用的可靠性评估具有重要的指导意义. 展开更多
关键词 本征点缺陷 氢相关缺陷 相互作用 α-Al_(2)O_(3)
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虚拟数字人对用户在线学习效果的影响研究
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作者 赵一鸣 郑乔治 沈校亮 《现代情报》 北大核心 2025年第1期81-96,共16页
[目的/意义]在教学环境中使用虚拟数字人进行授课可以促使用户更高效地在线学习。本研究旨在探究在线学习中虚拟数字人特征对用户在线学习效果的影响,为在线教学视频设计和教学策略优化提供参考。[方法/过程]结合准社会互动理论,使用VTu... [目的/意义]在教学环境中使用虚拟数字人进行授课可以促使用户更高效地在线学习。本研究旨在探究在线学习中虚拟数字人特征对用户在线学习效果的影响,为在线教学视频设计和教学策略优化提供参考。[方法/过程]结合准社会互动理论,使用VTube Studio软件设计虚拟数字人教学的视频材料,招募用户观看教学视频并测量用户的主观感受,对在线学习中虚拟教师授课的情境进行探究。[结果/结论]虚拟数字人的吸引力、拟人化特征通过用户对虚拟数字人的态度和学习满意度的链式中介作用积极影响在线学习效果,拟人化到学习效果的中介路径之间存在遮掩效应;准社会互动对学习满意度有积极影响,而对学习效果存在负面作用。 展开更多
关键词 虚拟数字人 虚拟人 虚拟教师 学习效果 准社会互动
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研究型大学教师参与教学改革的动力及其特征研究-基于符号互动理论分析的视角
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作者 李虹 《北京科技大学学报(社会科学版)》 2025年第1期39-50,共12页
大学教学质量的提升需要不断探索教学改革,其具体执行靠一线教师,一线教师有动力参与其中是教学改革成功的关键。文章基于质性研究方法,采用访谈法、参与式观察法、实物收集法等收集资料;对18所研究型大学、共计11个一级学科的33位一线... 大学教学质量的提升需要不断探索教学改革,其具体执行靠一线教师,一线教师有动力参与其中是教学改革成功的关键。文章基于质性研究方法,采用访谈法、参与式观察法、实物收集法等收集资料;对18所研究型大学、共计11个一级学科的33位一线教师进行深度访谈;运用Nvivo软件按照三级编码的操作程序和扎根理论的方法取径完成了理论建构。研究发现,大学教师参与教学改革包括不同主体主导因素、实践过程主导因素、目标结果主导因素和情境场景主导因素共四类32种动力因素。基于符号互动理论分析视角发现,研究型大学教师参与教.学改革的动力具有情境性、能动性和变化性特征,其动力因素具有多元性、矛盾性和复杂性特征,各个动力因素之间具有开放性、互动性和共生性特征。基于前述特征,政府、高校、二级学院教学管理者等需要营造积极的教学改革文化,发挥教学制度的正面效应,提供相应的教学支持保障。 展开更多
关键词 研究型大学 教师 教学改革 动力特征 符号互动理论
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拥有兄弟姐妹如何影响青少年的认知能力和主观幸福感?
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作者 梁文艳 何茜 《华东师范大学学报(教育科学版)》 北大核心 2025年第1期81-95,共15页
本研究对兄弟姐妹数量与青少年成长之间的关系进行了全面的理论探讨,并利用2010—2018年中国家庭追踪调查数据,为识别兄弟姐妹对青少年认知能力和主观幸福感的影响提供了微观证据。实证研究结果表明:拥有1个兄弟姐妹对青少年的主观幸福... 本研究对兄弟姐妹数量与青少年成长之间的关系进行了全面的理论探讨,并利用2010—2018年中国家庭追踪调查数据,为识别兄弟姐妹对青少年认知能力和主观幸福感的影响提供了微观证据。实证研究结果表明:拥有1个兄弟姐妹对青少年的主观幸福感有积极影响,这种影响效应随年龄增长而加强,并且在成年后依旧保持稳定;拥有兄弟姐妹可能对青少年的数学类认知能力产生负向影响,这种影响主要体现在较低学段样本中,并随年龄增长逐渐消失。本研究为父母制定生育决策时更有效地开展成本收益分析提供了支持,也为缓解养育焦虑、完善生育政策以及促进人口可持续发展提供了政策启示。 展开更多
关键词 资源稀释 群聚理论 同胞互动模型 认知能力 主观幸福感
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不同浓度丁香酚对肌原纤维蛋白结构和乳液凝胶特性的影响
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作者 李嘉琦 潘德胤 +2 位作者 马金明 刁静静 陈洪生 《食品工业科技》 CAS 北大核心 2025年第1期144-151,共8页
为了探究丁香酚添加量对肌原纤维蛋白乳液凝胶特性的影响,本文以猪肌原纤维蛋白为研究对象,模拟乳化香肠的加工过程,通过测定不同浓度的丁香酚(0、5、10、20、50、100 mg/g蛋白质)添加对蛋白的二级结构、凝胶强度、保水率、水分分布、... 为了探究丁香酚添加量对肌原纤维蛋白乳液凝胶特性的影响,本文以猪肌原纤维蛋白为研究对象,模拟乳化香肠的加工过程,通过测定不同浓度的丁香酚(0、5、10、20、50、100 mg/g蛋白质)添加对蛋白的二级结构、凝胶强度、保水率、水分分布、流变和微观结构等指标的影响,探讨丁香酚添加量对蛋白凝胶形成的作用规律。结果表明,添加低浓度的丁香酚(20 mg/g)显著提升了蛋白的凝胶强度、保水率(P<0.05),凝胶中不易流动水的含量和储能模量明显增加,蒸煮损失和冻融损失显著降低(P<0.05),凝胶中自由水含量减少。然而,当添加高浓度的丁香酚(100 mg/g)时,凝胶强度和保水率明显降低,蒸煮损失、冻融损失明显升高,且在扫描电镜下可清晰地看到凝胶网络结构粗糙、孔隙明显增大。综上,添加低浓度丁香酚(20 mg/g)可以有效地提高蛋白的凝胶特性,其有潜力成为一种新型的肉制品品质改良剂。 展开更多
关键词 丁香酚 肌原纤维蛋白 互作 凝胶特性 流变
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黄萎病菌诱导下陆地棉酵母双杂交文库的构建及GhMAPKKK2互作蛋白的筛选
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作者 程贯富 张文祥 +5 位作者 郭新悦 张国帅 吕晓迪 代培红 雷建峰 李月 《核农学报》 CAS 北大核心 2025年第1期68-76,共9页
为了探究棉花响应黄萎病菌侵染的分子机制并筛选GhMAPKKK2的互作蛋白,以陆地棉XLZ35为材料,基于Gateway克隆技术构建了棉花黄萎病菌诱导的陆地棉酵母双杂交文库,其中初级文库和次级文库的库容分别为1.2×10^(7)和2.0×10^(7)CFU... 为了探究棉花响应黄萎病菌侵染的分子机制并筛选GhMAPKKK2的互作蛋白,以陆地棉XLZ35为材料,基于Gateway克隆技术构建了棉花黄萎病菌诱导的陆地棉酵母双杂交文库,其中初级文库和次级文库的库容分别为1.2×10^(7)和2.0×10^(7)CFU,插入片段重组率均为100%且平均长度大于1000 bp。次级文库质粒浓度为953 ng·μL^(-1),符合构建酵母文库的标准,可用于酵母双杂交筛选互作蛋白。构建了pGBKT7-GhMAPKKK2表达载体,并验证了该载体对酵母细胞无毒性且不存在自激活活性。以GhMAPKKK2为诱饵蛋白,利用酵母文库初步筛选,获得81个阳性互作蛋白,经测序对比选取6个候选蛋白,通过酵母双杂交及双分子荧光互补试验(BiFC)验证,明确了候选蛋白GhFLA与GhMAPKKK2存在互作关系。本研究结果为解析GhMAPKKK2调控棉花抗黄萎病反应分子机制及调控网络提供了重要参考。 展开更多
关键词 棉花 黄萎病菌 酵母双杂交 互作蛋白 GhMAPKKK2
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Tailoring Light–Matter Interactions in Overcoupled Resonator for Biomolecule Recognition and Detection
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作者 Dongxiao Li Hong Zhou +2 位作者 Zhihao Ren Cheng Xu Chengkuo Lee 《Nano-Micro Letters》 SCIE EI CAS 2025年第1期262-280,共19页
Plasmonic nanoantennas provide unique opportunities for precise control of light–matter coupling in surface-enhanced infrared absorption(SEIRA)spectroscopy,but most of the resonant systems realized so far suffer from... Plasmonic nanoantennas provide unique opportunities for precise control of light–matter coupling in surface-enhanced infrared absorption(SEIRA)spectroscopy,but most of the resonant systems realized so far suffer from the obstacles of low sensitivity,narrow bandwidth,and asymmetric Fano resonance perturbations.Here,we demonstrated an overcoupled resonator with a high plasmon-molecule coupling coefficient(μ)(OC-Hμresonator)by precisely controlling the radiation loss channel,the resonator-oscillator coupling channel,and the frequency detuning channel.We observed a strong dependence of the sensing performance on the coupling state,and demonstrated that OC-Hμresonator has excellent sensing properties of ultra-sensitive(7.25%nm^(−1)),ultra-broadband(3–10μm),and immune asymmetric Fano lineshapes.These characteristics represent a breakthrough in SEIRA technology and lay the foundation for specific recognition of biomolecules,trace detection,and protein secondary structure analysis using a single array(array size is 100×100μm^(2)).In addition,with the assistance of machine learning,mixture classification,concentration prediction and spectral reconstruction were achieved with the highest accuracy of 100%.Finally,we demonstrated the potential of OC-Hμresonator for SARS-CoV-2 detection.These findings will promote the wider application of SEIRA technology,while providing new ideas for other enhanced spectroscopy technologies,quantum photonics and studying light–matter interactions. 展开更多
关键词 Plasmonic nanoantennas Light-matter interaction Surface-enhanced infrared absorption Overcoupled BIOSENSING
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Catalyst–Support Interaction in Polyaniline‑Supported Ni_(3)Fe Oxide to Boost Oxygen Evolution Activities for Rechargeable Zn‑Air Batteries
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作者 Xiaohong Zou Qian Lu +8 位作者 Mingcong Tang Jie Wu Kouer Zhang Wenzhi Li Yunxia Hu Xiaomin Xu Xiao Zhang Zongping Shao Liang An 《Nano-Micro Letters》 SCIE EI CAS 2025年第1期176-190,共15页
Catalyst–support interaction plays a crucial role in improving the catalytic activity of oxygen evolution reaction(OER).Here we modulate the catalyst–support interaction in polyaniline-supported Ni_(3)Fe oxide(Ni_(3... Catalyst–support interaction plays a crucial role in improving the catalytic activity of oxygen evolution reaction(OER).Here we modulate the catalyst–support interaction in polyaniline-supported Ni_(3)Fe oxide(Ni_(3)Fe oxide/PANI)with a robust hetero-interface,which significantly improves oxygen evolution activities with an overpotential of 270 mV at 10 mA cm^(-2)and specific activity of 2.08 mA cm_(ECSA)^(-2)at overpotential of 300 mV,3.84-fold that of Ni_(3)Fe oxide.It is revealed that the catalyst–support interaction between Ni_(3)Fe oxide and PANI support enhances the Ni–O covalency via the interfacial Ni–N bond,thus promoting the charge and mass transfer on Ni_(3)Fe oxide.Considering the excellent activity and stability,rechargeable Zn-air batteries with optimum Ni_(3)Fe oxide/PANI are assembled,delivering a low charge voltage of 1.95 V to cycle for 400 h at 10 mA cm^(-2).The regulation of the effect of catalyst–support interaction on catalytic activity provides new possibilities for the future design of highly efficient OER catalysts. 展开更多
关键词 Catalyst-support interaction Supported catalysts HETEROINTERFACE Oxygen evolution reaction Zn-air batteries
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A Rapid Adaptation Approach for Dynamic Air‑Writing Recognition Using Wearable Wristbands with Self‑Supervised Contrastive Learning
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作者 Yunjian Guo Kunpeng Li +4 位作者 Wei Yue Nam‑Young Kim Yang Li Guozhen Shen Jong‑Chul Lee 《Nano-Micro Letters》 SCIE EI CAS 2025年第2期417-431,共15页
Wearable wristband systems leverage deep learning to revolutionize hand gesture recognition in daily activities.Unlike existing approaches that often focus on static gestures and require extensive labeled data,the pro... Wearable wristband systems leverage deep learning to revolutionize hand gesture recognition in daily activities.Unlike existing approaches that often focus on static gestures and require extensive labeled data,the proposed wearable wristband with selfsupervised contrastive learning excels at dynamic motion tracking and adapts rapidly across multiple scenarios.It features a four-channel sensing array composed of an ionic hydrogel with hierarchical microcone structures and ultrathin flexible electrodes,resulting in high-sensitivity capacitance output.Through wireless transmission from a Wi-Fi module,the proposed algorithm learns latent features from the unlabeled signals of random wrist movements.Remarkably,only few-shot labeled data are sufficient for fine-tuning the model,enabling rapid adaptation to various tasks.The system achieves a high accuracy of 94.9%in different scenarios,including the prediction of eight-direction commands,and air-writing of all numbers and letters.The proposed method facilitates smooth transitions between multiple tasks without the need for modifying the structure or undergoing extensive task-specific training.Its utility has been further extended to enhance human–machine interaction over digital platforms,such as game controls,calculators,and three-language login systems,offering users a natural and intuitive way of communication. 展开更多
关键词 Wearable wristband Self-supervised contrastive learning Dynamic gesture Air-writing Human-machine interaction
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原发性骨质疏松潜在生物标志物的生物信息学分析
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作者 赵嘉诚 任诗齐 +3 位作者 祝秦 刘佳佳 朱翔 杨洋 《中国组织工程研究》 CAS 北大核心 2025年第8期1741-1750,共10页
背景:原发性骨质疏松症的发病率高,但发病机制尚不完全清楚,目前尚缺乏有效的早期筛查指标和治疗方案。目的:通过综合生物信息学分析,进一步探索原发性骨质疏松症的发生机制。方法:原发性骨质疏松症数据来自公共基因表达数据库,筛选差... 背景:原发性骨质疏松症的发病率高,但发病机制尚不完全清楚,目前尚缺乏有效的早期筛查指标和治疗方案。目的:通过综合生物信息学分析,进一步探索原发性骨质疏松症的发生机制。方法:原发性骨质疏松症数据来自公共基因表达数据库,筛选差异基因分别进行GO功能和KEGG通路富集分析。此外,将差异基因进行蛋白质-蛋白质相互作用网络确定原发性骨质疏松症相关核心基因,并通过最小绝对收缩和选择运算算法来识别并验证原发性骨质疏松症相关的生物标志物,并分别进行免疫细胞相关分析、基因富集分析以及药物标靶网络分析。最后将生物标志物行qPCR实验验证。结果与结论:①该研究中共获得126个差异基因以及前列腺素、表皮生长因子受体、丝裂原活化蛋白激酶3、转化生长因子B1和视网膜母细胞瘤基因1等5个生物标志物。②GO分析表明差异基因主要富集在细胞对氧化应激的反应以及自噬的调节等方面;KEGG分析显示主要集中在自噬以及细胞衰老等通路当中。③生物标志物的免疫分析发现,前列腺素,视网膜母细胞瘤基因1、丝裂原活化蛋白激酶3与免疫细胞密切相关。④基因富集分析表明,生物标志物与免疫相关途径有关。⑤药物标靶网络分析显示5个生物标志物与原发性骨质疏松症药物相关。⑥qPCR结果表明,前列腺素、表皮生长因子受体、丝裂原活化蛋白激酶3和转化生长因子B1在原发性骨质疏松症样本中,与对照样本相比表达显著上升(P<0.001),而视网膜母细胞瘤基因1在原发性骨质疏松症样本中,与对照样本相比表达显著下降(P<0.001)。⑦总之,该研究筛选并验证了5个原发性骨质疏松潜在生物标志物,为进一步深入探究原发性骨质疏松症的发病机制、早期筛查诊断及靶向治疗提供了参考依据。 展开更多
关键词 原发性骨质疏松 生物标志物 生物信息学 药物标靶网络 蛋白质-蛋白质相互作用网络
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T cell interactions with microglia in immune-inflammatory processes of ischemic stroke
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作者 Yuxiao Zheng Zilin Ren +8 位作者 Ying Liu Juntang Yan Congai Chen Yanhui He Yuyu Shi Fafeng Cheng Qingguo Wang Changxiang Li Xueqian Wang 《Neural Regeneration Research》 SCIE CAS 2025年第5期1277-1292,共16页
The primary mechanism of secondary injury after cerebral ischemia may be the brain inflammation that emerges after an ischemic stroke,which promotes neuronal death and inhibits nerve tissue regeneration.As the first i... The primary mechanism of secondary injury after cerebral ischemia may be the brain inflammation that emerges after an ischemic stroke,which promotes neuronal death and inhibits nerve tissue regeneration.As the first immune cells to be activated after an ischemic stroke,microglia play an important immunomodulatory role in the progression of the condition.After an ischemic stroke,peripheral blood immune cells(mainly T cells)are recruited to the central nervous system by chemokines secreted by immune cells in the brain,where they interact with central nervous system cells(mainly microglia)to trigger a secondary neuroimmune response.This review summarizes the interactions between T cells and microglia in the immune-inflammatory processes of ischemic stroke.We found that,during ischemic stroke,T cells and microglia demonstrate a more pronounced synergistic effect.Th1,Th17,and M1 microglia can co-secrete proinflammatory factors,such as interferon-γ,tumor necrosis factor-α,and interleukin-1β,to promote neuroinflammation and exacerbate brain injury.Th2,Treg,and M2 microglia jointly secrete anti-inflammatory factors,such as interleukin-4,interleukin-10,and transforming growth factor-β,to inhibit the progression of neuroinflammation,as well as growth factors such as brain-derived neurotrophic factor to promote nerve regeneration and repair brain injury.Immune interactions between microglia and T cells influence the direction of the subsequent neuroinflammation,which in turn determines the prognosis of ischemic stroke patients.Clinical trials have been conducted on the ways to modulate the interactions between T cells and microglia toward anti-inflammatory communication using the immunosuppressant fingolimod or overdosing with Treg cells to promote neural tissue repair and reduce the damage caused by ischemic stroke.However,such studies have been relatively infrequent,and clinical experience is still insufficient.In summary,in ischemic stroke,T cell subsets and activated microglia act synergistically to regulate inflammatory progression,mainly by secreting inflammatory factors.In the future,a key research direction for ischemic stroke treatment could be rooted in the enhancement of anti-inflammatory factor secretion by promoting the generation of Th2 and Treg cells,along with the activation of M2-type microglia.These approaches may alleviate neuroinflammation and facilitate the repair of neural tissues. 展开更多
关键词 BRAIN IMMUNE INFLAMMATION interaction ischemic stroke mechanism MICROGLIA NEURON secondary injury T cells
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骨形态发生蛋白/Wnt信号通路调控成骨:揭示骨骼形成和重塑的分子机制 被引量:1
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作者 刘淏文 乔卫平 +3 位作者 孟志成 李凯杰 韩暄 史鹏博 《中国组织工程研究》 CAS 北大核心 2025年第3期563-571,共9页
背景:成骨细胞是负责骨骼形成和重塑的主要细胞类型,其功能的正常发挥受到多种信号通路的精密调控,其中,骨形态发生蛋白和Wnt信号通路在成骨过程中起着关键作用。目的:综述了骨形态发生蛋白/Wnt信号通路在调控成骨细胞功能中的作用,并... 背景:成骨细胞是负责骨骼形成和重塑的主要细胞类型,其功能的正常发挥受到多种信号通路的精密调控,其中,骨形态发生蛋白和Wnt信号通路在成骨过程中起着关键作用。目的:综述了骨形态发生蛋白/Wnt信号通路在调控成骨细胞功能中的作用,并分析其在不同生理和病理条件下的变化,以期进一步揭示骨骼形成和重塑的分子机制。方法:以中文检索词“BMP信号通路,Wnt信号通路,成骨”及英文检索词“BMP signaling pathway,Wnt signaling pathway,osteogenesis”在中国知网、万方和PubMed数据库中检索研究原著,检索时限为各数据库建库至2023年6月的相关文献,最终筛选61篇文献进行分析总结。采用文献综述的方法,对骨形态发生蛋白/Wnt信号通路调控成骨作用的研究进行梳理和分析。结果与结论:①骨形态发生蛋白和Wnt信号通路在成骨细胞的分化、增殖和成熟过程中发挥重要作用。骨形态发生蛋白信号通路主要通过激活Smad蛋白来调控成骨相关基因的表达,Smad蛋白被激活后进入细胞核,调控与成骨相关的基因表达,与骨形态发生蛋白不同,Wnt信号通路主要依赖于β-catenin的激活来发挥生物学效应。②不同生理和病理状态下,骨形态发生蛋白/Wnt信号通路的调控作用会受到多种因素的影响。生长因子及激素及机械应力等会在一定程度上影响骨形态发生蛋白/Wnt信号通路的活性。③骨形态发生蛋白/Wnt信号通路在调控成骨过程中与其他信号通路相互作用,共同构成复杂的调控网络。④中药和天然化合物可以通过调控信号通路来促进骨骼健康,为中药治疗骨骼疾病提供了新的可能性。⑤未来研究可进一步探讨骨形态发生蛋白/Wnt信号通路与其他信号通路的相互作用以及其在不同生理和病理条件下的变化,解析此复杂网络中的关键节点和调控机制,为骨骼相关疾病的治疗提供更精确的靶点,也为揭示骨骼形成和重塑的分子机制提供新的思路。 展开更多
关键词 骨形态发生蛋白信号通路 Wnt信号通路 成骨 骨骼 基因表达 分化 增殖 调控作用 交互作用 调控网络
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Diabetes-inducing effects of bronchial asthma
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作者 Mohammed Al-Beltagi Adel Salah Bediwy +2 位作者 Nermin Kamal Saeed Hosameldin A Bediwy Reem Elbeltagi 《World Journal of Diabetes》 SCIE 2025年第1期121-139,共19页
BACKGROUND The relationship between diabetes mellitus(DM)and asthma is complex and can impact disease trajectories.AIM To explore the bidirectional influences between the two conditions on clinical outcomes and diseas... BACKGROUND The relationship between diabetes mellitus(DM)and asthma is complex and can impact disease trajectories.AIM To explore the bidirectional influences between the two conditions on clinical outcomes and disease control.METHODS We systematically reviewed the literature on the relationship between DM and asthma,focusing on their impacts,mechanisms,and therapeutic implications.Various studies were assessed,which investigated the effect of glycemic control on asthma outcomes,lung function,and exacerbations.The study highlighted the role of specific diabetes medications in managing asthma.RESULTS The results showed that poor glycemic control in diabetes can exacerbate asthma,increase hospitalizations,and reduce lung function.Conversely,severe asthma,especially in obese individuals,can complicate diabetes management and make glycemic control more difficult.The diabetes-associated mechanisms,such as inflammation,microangiopathy,and oxidative stress,can exacerbate asthma and decrease lung function.Some diabetes medications exhibit anti-inflammatory effects that show promise in mitigating asthma exacerbations.CONCLUSION The complex interrelationship between diabetes and asthma suggests bidirectional influences that affect disease course and outcomes.Inflammation and microvascular complications associated with diabetes may worsen asthma outcomes,while asthma severity,especially in obese individuals,complicates diabetes control.However,the current research has limitations,and more diverse longitudinal studies are required to establish causal relationships and identify effective treatment strategies for individuals with both conditions. 展开更多
关键词 Diabetes mellitus Bronchial asthma Glycemic control Lung function Asthma exacerbation Disease interaction MICROANGIOPATHY
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CNKSR2 interactome analysis indicates its association with the centrosome/microtubule system
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作者 Lin Yin Yalan Xu +9 位作者 Jie Mu Yu Leng Lei Ma Yu Zheng Ruizhi Li Yin Wang Peifeng Li Hai Zhu Dong Wang Jing Li 《Neural Regeneration Research》 SCIE CAS 2025年第8期2420-2432,共13页
The protein connector enhancer of kinase suppressor of Ras 2(CNKSR2),present in both the postsynaptic density and cytoplasm of neurons,is a scaffolding protein with several protein-binding domains.Variants of the CNKS... The protein connector enhancer of kinase suppressor of Ras 2(CNKSR2),present in both the postsynaptic density and cytoplasm of neurons,is a scaffolding protein with several protein-binding domains.Variants of the CNKSR2 gene have been implicated in neurodevelopmental disorders,particularly intellectual disability,although the precise mechanism involved has not yet been fully understood.Research has demonstrated that CNKSR2 plays a role in facilitating the localization of postsynaptic density protein complexes to the membrane,thereby influencing synaptic signaling and the morphogenesis of dendritic spines.However,the function of CNKSR2 in the cytoplasm remains to be elucidated.In this study,we used immunoprecipitation and high-resolution liquid chromatography-mass spectrometry to identify the interactors of CNKSR2.Through a combination of bioinformatic analysis and cytological experiments,we found that the CNKSR2 interactors were significantly enriched in the proteome of the centrosome.We also showed that CNKSR2 interacted with the microtubule protein DYNC1H1 and with the centrosome marker CEP290.Subsequent colocalization analysis confirmed the centrosomal localization of CNKSR2.When we downregulated CNKSR2 expression in mouse neuroblastoma cells(Neuro 2A),we observed significant changes in the expression of numerous centrosomal genes.This manipulation also affected centrosome-related functions,including cell size and shape,cell proliferation,and motility.Furthermore,we found that CNKSR2 interactors were highly enriched in de novo variants associated with intellectual disability and autism spectrum disorder.Our findings establish a connection between CNKSR2 and the centrosome,and offer new insights into the underlying mechanisms of neurodevelopmental disorders. 展开更多
关键词 autism spectrum disorder CENTROSOME CNKSR2 intellectual disability INTERACTOME mass spectrometry MICROTUBULE neurodevelopmental disease protein complexes protein-protein interactions
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Mutual regulation of microglia and astrocytes after Gas6 inhibits spinal cord injury
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作者 Jiewen Chen Xiaolin Zeng +6 位作者 Le Wang Wenwu Zhang Gang Li Xing Cheng Peiqiang Su Yong Wan Xiang Li 《Neural Regeneration Research》 SCIE CAS 2025年第2期557-573,共17页
Invasive inflammation and excessive scar formation are the main reasons for the difficulty in repairing nervous tissue after spinal cord injury.Microglia and astrocytes play key roles in the spinal cord injury micro-e... Invasive inflammation and excessive scar formation are the main reasons for the difficulty in repairing nervous tissue after spinal cord injury.Microglia and astrocytes play key roles in the spinal cord injury micro-environment and share a close interaction.However,the mechanisms involved remain unclear.In this study,we found that after spinal cord injury,resting microglia(M0)were polarized into pro-inflammatory phenotypes(MG1 and MG3),while resting astrocytes were polarized into reactive and scar-forming phenotypes.The expression of growth arrest-specific 6(Gas6)and its receptor Axl were significantly down-regulated in microglia and astrocytes after spinal cord injury.In vitro experiments showed that Gas6 had negative effects on the polarization of reactive astrocytes and pro-inflammatory microglia,and even inhibited the cross-regulation between them.We further demonstrated that Gas6 can inhibit the polarization of reactive astrocytes by suppressing the activation of the Yes-associated protein signaling pathway.This,in turn,inhibited the polarization of pro-inflammatory microglia by suppressing the activation of the nuclear factor-κB/p65 and Janus kinase/signal transducer and activator of transcription signaling pathways.In vivo experiments showed that Gas6 inhibited the polarization of pro-inflammatory microglia and reactive astrocytes in the injured spinal cord,thereby promoting tissue repair and motor function recovery.Overall,Gas6 may play a role in the treatment of spinal cord injury.It can inhibit the inflammatory pathway of microglia and polarization of astrocytes,attenuate the interaction between microglia and astrocytes in the inflammatory microenvironment,and thereby alleviate local inflammation and reduce scar formation in the spinal cord. 展开更多
关键词 ASTROCYTES AXL cell polarization GAS6 Hippo signal inflammatory micro-environment intercellular interaction MICROGLIA single-cell sequencing spinal cord injury
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Dynamic Interaction Analysis of Coupled Axial-Torsional-Lateral Mechanical Vibrations in Rotary Drilling Systems
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作者 Sabrina Meddah Sid Ahmed Tadjer +3 位作者 Abdelhakim Idir Kong Fah Tee Mohamed Zinelabidine Doghmane Madjid Kidouche 《Structural Durability & Health Monitoring》 EI 2025年第1期77-103,共27页
Maintaining the integrity and longevity of structures is essential in many industries,such as aerospace,nuclear,and petroleum.To achieve the cost-effectiveness of large-scale systems in petroleum drilling,a strong emp... Maintaining the integrity and longevity of structures is essential in many industries,such as aerospace,nuclear,and petroleum.To achieve the cost-effectiveness of large-scale systems in petroleum drilling,a strong emphasis on structural durability and monitoring is required.This study focuses on the mechanical vibrations that occur in rotary drilling systems,which have a substantial impact on the structural integrity of drilling equipment.The study specifically investigates axial,torsional,and lateral vibrations,which might lead to negative consequences such as bit-bounce,chaotic whirling,and high-frequency stick-slip.These events not only hinder the efficiency of drilling but also lead to exhaustion and harm to the system’s components since they are difficult to be detected and controlled in real time.The study investigates the dynamic interactions of these vibrations,specifically in their high-frequency modes,usingfield data obtained from measurement while drilling.Thefindings have demonstrated the effect of strong coupling between the high-frequency modes of these vibrations on drilling sys-tem performance.The obtained results highlight the importance of considering the interconnected impacts of these vibrations when designing and implementing robust control systems.Therefore,integrating these compo-nents can increase the durability of drill bits and drill strings,as well as improve the ability to monitor and detect damage.Moreover,by exploiting thesefindings,the assessment of structural resilience in rotary drilling systems can be enhanced.Furthermore,the study demonstrates the capacity of structural health monitoring to improve the quality,dependability,and efficiency of rotary drilling systems in the petroleum industry. 展开更多
关键词 Rotary drilling systems mechanical vibrations structural durability dynamic interaction analysis field data analysis
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