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不同细度超细羊毛的力学性能研究

毛纺科技 2013年第6期41卷 62-64页

作者：田晓姗孙润军西安工程大学纺织与材料学院陕西西安710048

通过对11.4～20.5μm等9种不同细度超细羊毛的拉伸性能、摩擦性能进行测试,研究细度对超细羊毛纤维拉伸及摩擦等力学性能的影响,得到了细度与拉伸性能、摩擦性能之间的一般规律,对实际的毛纺工艺有一定的参考价值。实验结果表明:在一定... 详细信息

通过对11.4～20.5μm等9种不同细度超细羊毛的拉伸性能、摩擦性能进行测试,研究细度对超细羊毛纤维拉伸及摩擦等力学性能的影响,得到了细度与拉伸性能、摩擦性能之间的一般规律,对实际的毛纺工艺有一定的参考价值。实验结果表明:在一定的细度范围内,超细羊毛纤维的拉伸强度随细度的增加先下降随后逐步增大,而摩擦性能与细度的关系较为复杂,表现在摩擦因数与摩擦效应2方面,其总体变化趋势较为缓慢稳定,在一定的范围内波动。

关键词：超细羊毛细度拉伸性能摩擦性能

Treadmill exercise in combination with acousto-optic and olfactory stimulation improves cognitive function in APP/PS1 mice through the brain-derived neurotrophic factor-and Cygb-associated signaling pathways

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Neural Regeneration Research 2025年第9期20卷 2706-2726页

作者： Biao xiao Chaoyang Chu Zhicheng Lin tianyuan Fang Yuyu Zhou Chuxia Zhang Jianghui shan Shiyu Chen Liping Li Department of Physiology and Pharmacology Health Science CenterNingbo UniversityNingboZhejiang ProvinceChina Ningbo Key Laboratory of Behavioral Neuroscience Health Science CenterNingbo UniversityNingboZhejiang ProvinceChina Key Laboratory of Addiction Research of Zhejiang Province NingboZhejiang ProvinceChina

A reduction in adult neurogenesis is associated with behavioral abnormalities in patients with Alzheimer's ***,enhancing adult neurogenesis represents a promising therapeutic approach for mitigating disease symptoms and ***,nonpharmacological interventions aimed at inducing adult neurogenesis are currently *** individual non-pharmacological interventions,such as aerobic exercise,acousto-optic stimulation,and olfactory stimulation,have shown limited capacity to improve neurogenesis and cognitive function in patients with Alzheimer's disease,the therapeutic effect of a strategy that combines these interventions has not been fully *** this study,we observed an age-dependent decrease in adult neurogenesis and a concurrent increase in amyloid-beta accumulation in the hippocampus of amyloid precursor protein/presenilin 1 mice aged 2-8 *** deposition became evident at 4 months,while neurogenesis declined by 6 months,further deteriorating as the disease ***,following a 4-week multifactor stimulation protocol,which encompassed treadmill running(46 min/d,10 m/min,6 days per week),40 Hz acousto-optic stimulation(1 hour/day,6 days/week),and olfactory stimulation(1 hour/day,6 days/week),we found a significant increase in the number of newborn cells(5'-bromo-2'-deoxyuridine-positive cells),immature neurons(doublecortin-positive cells),newborn immature neurons(5'-bromo-2'-deoxyuridine-positive/doublecortin-positive cells),and newborn astrocytes(5'-bromo-2'-deoxyuridine-positive/glial fibrillary acidic protein-positive cells).Additionally,the amyloid-beta load in the hippocampus *** findings suggest that multifactor stimulation can enhance adult hippocampal neurogenesis and mitigate amyloid-beta neuropathology in amyloid precursor protein/presenilin 1 ***,cognitive abilities were improved,and depressive symptoms were alleviated in amyloid precursor protein/presenilin 1 mice

关键词： acousto-optic stimulation adult neurogenesis Alzheimer's disease amyloid precursor protein/presenilin 1 mice amyloid-beta deposition brain cell apoptosis cognitive impairment depression-like behavior involuntary treadmill exercise olfactory stimulation serum metabolites

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涤/棉/麻混纺纱的开发与性能分析

毛纺科技 2014年第5期42卷 9-11页

作者：田晓姗孙润军薛建昌西安工程大学纺织与材料学院陕西西安710048 石家庄常山恒新纺织有限公司河北石家庄050000

设计开发了采用赛络菲尔纺和环锭纺8个品种的涤/棉/麻混纺纱线。通过研究测试分析,结果表明:赛络菲尔纺纱线性能较为稳定,出现强力弱节概率小,纱线的毛羽情况较优于环锭纺纱;随着大麻纤维含量的增加,纱线的强力、条干、毛羽、纱疵等综... 详细信息

设计开发了采用赛络菲尔纺和环锭纺8个品种的涤/棉/麻混纺纱线。通过研究测试分析,结果表明:赛络菲尔纺纱线性能较为稳定,出现强力弱节概率小,纱线的毛羽情况较优于环锭纺纱;随着大麻纤维含量的增加,纱线的强力、条干、毛羽、纱疵等综合性能呈下降趋势。当大麻纤维含量从10%增加到15%时,纱线各指标变化平稳;当大麻纤维含量增加到20%时,纱线的成纱质量较好,但纱疵的增多较为明显。

关键词：大麻纤维赛络菲尔纺环锭纺混纺比例

Graphene Aerogel Composites with Self‑Organized Nanowires‑Packed Honeycomb Structure for Highly Efficient Electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第2期17卷 533-547页

作者： xiao You Huiying Ouyang Ruixiang Deng Qiuqi Zhang Zhenzhong Xing xiaowu Chen Qingliang shan Jinshan Yang Shaoming Dong State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Key Laboratory of Inorganic Coating Materials CAS Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Structural Ceramics and Composites Engineering Research Center Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049People’s Republic of China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210People’s Republic of China School of Materials Science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China University of Chinese Academy of Sciences Beijing 100039People’s Republic of China

With vigorous developments in nanotechnology,the elaborate regulation of microstructure shows attractive potential in the design of electromagnetic wave ***,a hierarchical porous structure and composite heterogeneous interface are constructed successfully to optimize the electromagnetic loss *** macro–micro-synergistic graphene aerogel formed by the ice template‑assisted 3D printing strategy is cut by silicon carbide nanowires(SiC_(nws))grown in situ,while boron nitride(BN)interfacial structure is introduced on graphene *** unique composite structure forces multiple scattering of incident EMWs,ensuring the combined effects of interfacial polarization,conduction networks,and magnetic-dielectric ***,the as-prepared composites present a minimum reflection loss value of−37.8 dB and a wide effective absorption bandwidth(EAB)of 9.2 GHz(from 8.8 to 18.0 GHz)at 2.5 ***,relying on the intrinsic high-temperature resistance of SiC_(nws) and BN,the EAB also remains above 5.0 GHz after annealing in air environment at 600℃ for 10 h.

关键词： Hierarchical porous structure Interface High-temperature resistance Graphene aerogel composites Electromagnetic wave absorption

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浅谈张家界市森防工作的现状及对策

湖南环境生物职业技术学院学报 2004年第1期10卷 14-16页

作者：田小山王本福湖南省张家界市林业局湖南张家界416600

阐述了张家界市森林病虫害的发生特点、森防工作面临的问题 ,并提出了强化森防工作的建议 .

关键词：森林病虫害防治建议张家界市

Prevalence of Helicobacter pylori infection in Chinese military personnel:A cross-sectional,multicenter-based study

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World Journal of Gastroenterology 2025年第3期31卷 42-49页

作者： Han-Chen Min Chun-Yan Zhang Fang-Yu Wang xiao-Hui Yu shan-Hong Tang Hong-Wu Zhu Ya-Gang Zhao Ji-Luo Liu Jian Wang Jing-Han Guo xiao-Mei Zhang Yun-Sheng Yang Chinese People’s Liberation Army Medical School Chinese People’s Liberation Army General HospitalBeijing 100853China Department of Gastroenterology and Hepatology The First Medical CenterChinese People’s Liberation Army General HospitalBeijing 100853China Sixth Healthcare Department The Second Medical CenterChinese People’s Liberation Army General HospitalBeijing 100853China Department of Gastroenterology The 940th Hospital of Joint Logistic Support Force of Chinese People’s Liberation ArmyLanzhou 730050Gansu ProvinceChina Department of Gastroenterology General Hospital of Western Theater CommandChengdu 610011Sichuan ProvinceChina Department of Gastroenterology General Hospital of Southern Theater CommandGuangzhou 510010Guangdong ProvinceChina Department of Epidemiology Naval Medical UniversityShanghai 200433China School of Medicine Nankai UniversityTianjin 300071China National Clinical Research Center for Geriatric Diseases Chinese People’s Liberation Army General HospitalBeijing 100853China

BACKGROUND Helicobacter pylori(***)infection is a prevalent disease encountered in military internal medicine and recognized as the main cause of dyspepsia,gastritis,and peptic ulcer,which are common diseases in military *** guidelines in China state all patients with evidence of active infection with *** are offered ***,the prevalence of *** infection and its regional distribution in the military population remain unclear,which hinders effective prevention and treatment *** the prevalence of *** infection in the military population will aid in the development of customized strategies to better manage this infectious *** To investigate the prevalence of *** infection in the Chinese military population in different geographic *** This multicenter,retrospective study included 22421 individuals from five tertiary hospitals located in north,east,southwest,and northwest cities of *** infection was identified using the urea breath test,which had been performed between January 2020 and December *** Of the 22421 military service members,7416(33.1%)were urea breath *** highest prevalence of *** was in the 30-39 years age group for military personnel,with an infection rate of 34.9%.The majority of infected subjects were younger than 40-years-old,accounting for 70.4%of the infected *** individuals serviced in Lanzhou and Chengdu showed a higher infection prevalence than those in Beijing,Nanjing,and Guangzhou,with prevalence rates of 44.3%,37.9%,29.0%,31.1%,and 32.3%,*** *** infection remains a common infectious disease among military personnel in China and has a relatively high prevalence rate in northwest China.

关键词： Helicobacter pylori Prevalence Military personnel Urea breath test Multicenter study

P2Y1 receptor in Alzheimer’s disease

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Neural Regeneration Research 2025年第2期20卷 440-453页

作者： shan Luo Yifei Wang Tatsuhiro Hisatsune Department of Integrated Biosciences The University of TokyoKashiwaJapan

Alzheimer’s disease is the most frequent form of dementia characterized by the deposition of amyloid-beta plaques and neurofibrillary tangles consisting of hyperphosphorylated *** amyloid-beta plaques has been a primary direction for developing Alzheimer’s disease treatments in the last ***,existing drugs targeting amyloid-beta plaques have not fully yielded the expected results in the clinic,necessitating the exploration of alternative therapeutic *** evidence unravels that astrocyte morphology and function alter in the brain of Alzheimer’s disease patients,with dysregulated astrocytic purinergic receptors,particularly the P2Y1 receptor,all of which constitute the pathophysiology of Alzheimer’s *** receptors are not only crucial for maintaining normal astrocyte function but are also highly implicated in neuroinflammation in Alzheimer’s *** review delves into recent insights into the association between P2Y1 receptor and Alzheimer’s disease to underscore the potential neuroprotective role of P2Y1 receptor in Alzheimer’s disease by mitigating neuroinflammation,thus offering promising avenues for developing drugs for Alzheimer’s disease and potentially contributing to the development of more effective treatments.

关键词： astrocytes neuroinflammation P2Y1 receptor purinergic receptor

Two 3-D multi-cascade co-design inverse methods based on streamline curvature approach and Clebsch formulation for single-stage centrifugal compressors

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航空动力学报 2013年第7期28卷 1526-1538页

作者： tian xiao-pei shan Peng School of Energy and Power Engineering Beijing University of Aeronautics and Astronautics

Two strategies extended the single-cascade methods from a compressible three-dimensional inverse method for radial and mixed flow turbomachines to two three-dimensional multi-cascade co-design methods for single-stage centrifugal *** two three-dimensional methods and a typical quasi-threedimensional streamline curvature through-flow inverse method were employed to design the same subsonic high-speed single-stage centrifugal *** compressor performances were simulated by a commercial Reynolds averaged Navier-Stokes(RANS) equations *** studies show that two three-dimensional codesign methods are reasonable and *** was found that : firstly the blade camber angle designed by the three-dimensional methods was larger than that designed by the quasi-three-dimensional method;and secondly with regard to two three-dimensional methods with different boundary conditions,the co-design result differences between the diffusers were small,but those between the deswirlers were relatively large.

关键词： centrifugal compressor through-flow inverse method three-dimensional inverse problem streamline curvature approach Clebsch formulation multi-cascade co-design

非透明纤维集合体的树脂浸透速率测试方法探究

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聚酯工业 2024年第4期37卷 30-33页

作者：张边江田晓姗韩广雷武晓春陕西华特新材料股份有限公司陕西咸阳713100

通过对纤维树脂浸透速率的测试方法进行分析,发现靶环法适合测试树脂浸渍后由不透明变透明的纤维集合体的树脂浸透速率,不适合测试树脂浸渍后不变透明的纤维集合体的树脂浸透速率。文章设计了一种基于靶环法改进的非透明纤维树脂浸透速... 详细信息

通过对纤维树脂浸透速率的测试方法进行分析,发现靶环法适合测试树脂浸渍后由不透明变透明的纤维集合体的树脂浸透速率,不适合测试树脂浸渍后不变透明的纤维集合体的树脂浸透速率。文章设计了一种基于靶环法改进的非透明纤维树脂浸透速率测试方法—靶盘示踪法。研究结果表明靶盘示踪法测试非透明纤维集合体的树脂浸透速率时,具有测试方法简单、结果稳定的特点。

关键词：浸透速率靶环法靶盘示踪法非透明纤维