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Piezoresistive behavior of elastomer composites with segregated network of carbon nanostructures and alumina

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Nano Materials Science 2023年第3期5卷 312-318页

作者： chun-yan tang Lei Liu Kai Ke Bo Yin Ming-Bo yang Wei yang College of Polymer Science and Engineering Sichuan UniversityState Key Laboratory of Polymer Materials EngineeringChengdu610065SichuanChina

Electrically conductive elastomer composites(CECs)with segregated networks of conductive nanofillers show high potential in stretchable strain sensors due to balanced mechanical and electrical properties,yet the sensitivity at low strain is generally insufficient for practical ***,we report an easy and effective way to improve the resistive response to low strain for CECs with segregated network structure via adding stiff alumina into carbon nanostructures(CNS).The CEC containing 0.7 wt%CNS and 5 wt%Al_(2)O_(3) almost sustains the same elasticity(elongation at break of~900%)and conductivity(0.8 S/m)as the control,while the piezoresistive sensitivity is significantly *** polyurethane(TPU)composites with a segregated network of hybrid nanofillers(CNS and Al_(2)O_(3))show much higher strain sensitivity(Gauge factor,GF-566)at low strain(45%strain)due to a local stress concentration effect,this sensitivity is superior to that of TPU/CNS composites(GF-11).Such a local stress concentration effect depends on alumina content and its distribution at the TPU particle *** addition,CECs with hybrid fillers show better reproducibility in cyclic piezoresistive behavior testing than the *** work offers an easy method for fabricating CECs with a segregated filler network offering stretchable strain sensors with a high strain sensitivity.

关键词： Thermoplastic polyurethane Carbon nanostructures Alumina Conductive elastomer composites Stretchable strain sensor

Silk fibroin-based flexible pressure sensors:processing and application

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Materials Futures 2024年第3期3卷 71-94页

作者： Muhan Chen Junhong Liu Yidi Hu Yujie Wu chun-yan tang Kai Ke Wei yang College of Polymer Science and Engineering Sichuan UniversityState Key Laboratory of Polymer Materials EngineeringChengdu 610065SichuanPeople’s Republic of China

With the advent of the internet of things and artificial intelligence,flexible and portable pressure sensors have shown great application potential in human-computer interaction,personalized medicine and other *** comparison with traditional inorganic materials,flexible polymeric materials conformable to the human body are more suitable for the fabrication of wearable pressure *** the consumption of a huge amount of flexible wearable electronics in near future,it is necessary to turn their attention to biodegradable polymers for the fabrication of flexible pressure sensors toward the development requirement of green and sustainable *** this paper,the structure and properties of silk fibroin(SF)are introduced,and the source and research progress of the piezoelectric properties of SF are systematically *** addition,this paper summarizes the advance in the studies on SF-based capacitive,resistive,triboelectric,and piezoelectric sensors reported in recent years,and focuses on their fabrication methods and ***,this paper also puts forward the future development trend of high-efficiency fabrication and corresponding application of SF-based piezoelectric *** offers new insights into the design and fabrication of green and biodegradable bioelectronics for in vitro and in vivo sensing applications.

关键词： silk fibroin flexible pressure sensor piezoelectric biodegradable healthcare

Fate of Nitrogen from Organic and Inorganic Sources in Rice-Wheat Rotation Cropping System

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Agricultural Sciences in China 2010年第7期9卷 1017-1025页

作者： CHEN Yi,WU chun-yan,tang Xu,yanG Sheng-mao and WANG Jia-yu Institute of Environmental Resources and Soil Fertilizer,Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,P.R.China Institute of Environmental Resources and Soil Fertilizer Zhejiang Academy of Agricultural Sciences Hangzhou 310021 P.R. China

The lower availability of N is one of the most important limiting factors impeding crop yield enhancement among the various factors that affect crop yield under the multiple-cropping agroecosystem in *** this study,the recovery of a single application of 15N-labeled fertilizer or residues in rice-wheat cropping system was determined,in order to provide theoretical foundation for the nitrogen management in sustainable agricultural production.A continuous trace experiment was conducted for 15N microplots by using randomized block design with four treatments and four replications（T1 = 15N-labeled fertilizer with crop residue incorporation,T2 = 15N-labeled residues,T3 = 14N fertilizer to generate unlabeled crop residue,and T4 = 15Nlabeled fertilizer without crop residue incorporation）.Our results showed that,on average,17.17 and 12.01% of crop N was derived from N fertilizer and 15N-labeled residues,respectively during the first growing season,suggesting that approximately 82.83 or 87.99% of crop N was derived directly from soil N *** was a larger difference in the 15N recovery pattern in crop when N was applied as fertilizer or residues,i.e.,most of crop N derived from N fertilizer was absorbed in the first growing season（92.04%）,and the relevant value was 38.03% when 15N-labeled residues were *** implied that most of N fertilizer was recovered in the present cropping season,while a longer residue effect will be found for 15N-labeled ***,the average recovery of N fertilizer and N residue in the soil after the first growing season was 33.46 and 85.64%,*** recovery of applied N in soil when N was applied as residues was significantly higher than that when N was applied as *** was a larger difference in the total 15N recovery in plant and soil when N was applied as fertilizer or *** the end of the fifth or sixth cropping season,the total 15N recovery in plant and soil when N was applied as fertilizer or resi

关键词： crop residue fertilizer fate 15N isotope nitrogen fertilizer rice field

VIP modulate TREM-1/TREM-2 expression of macrophages by inhibiting NF-kappaB activation

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VIP modulate TREM-1/TREM-2 expression of macrophages by inhi...

The interaction between KIF21A and KANK1 regulates dendritic morphology and synapse plasticity in neurons

中国生理学会第23届全国会员代表大会暨生理学学术大会

作者： Guo-Ying SUN,Cha-Xiang GUAN~*,Yong ZHOU,chun-yan tang,Hui-Fang ZHOU Department of Physiology,Xiangya School of Medicine,Central South University,Changsha,China

Triggering receptors expressed on myeloid cells-1(TREM-1) and triggering receptors expressed on myeloid cells-2(TREM-2) are important inflammatory molecules during acute *** intestinal peptide(VIP) is one of the most important sensory neuropeptides,which has played a vital role in organism’s physiological *** the present study,we have tested the hypothesis that VIP down-regulated the TREM-1 expression and up-regulated the TREM-2 expression in LPS-induced *** the modulating mechanism of VIP on TREM-1 and TREM-2 expression was *** is known that TREM-1 and TREM-2 combine with TOLL-like receptor(TLR) and Nod-like receptor(NLR) which could been activated by lipopolysaccharide(LPS), leading to increased nuclear binding of transcription factors such as ***,we observed VIP down-regulated NF-kappaB mRNA expression in different time(2 h,4 h,6 h,12 h,and 24 h) and in dose-dependent (10 mol/L,10 mol/L,10 mol/L,and 10 mol/L).PDTC,an inhibitor of NF-kB activation,reduced TREM-1 and TREM-2 production from LPS-stimulated macrophages in *** of this signaling pathway may have regulatory effects on TREM-1 and TREM-2 expression,and VIP could be useful for therapeutic effects of immunity in LPS-induced macrophages by inhibiting NF-kB activation.

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Neural Regeneration Research 2025年第1期20卷 209-223页

作者： Shi-yan Sun Lingyun Nie Jing Zhang Xue Fang Hongmei Luo Chuanhai Fu Zhiyi Wei Ai-Hui tang Hefei National Research Center for Physical Sciences at the Microscale CAS Key Laboratory of Brain Function and DiseaseMinistry of Education Key Laboratory for Membrane-less Organelles and Cellular DynamicsDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui ProvinceChina Institute of Artificial Intelligence Hefei Comprehensive National Science CenterHefeiAnhui ProvinceChina CAS Center for Excellence in Molecular Cell Sciences Division of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhui ProvinceChina Department of Neurobiology School of Life SciencesSouthern University of Science and TechnologyShenzhenGuangdong ProvinceChina Brain Research Center Southern University of Science and TechnologyShenzhenGuangdong ProvinceChina

Morphological alterations in dendritic spines have been linked to changes in functional communication between neurons that affect learning and ***-4 KIF21A helps organize the microtubule-actin network at the cell cortex by interacting with KANK1;however,whether KIF21A modulates dendritic structure and function in neurons remains *** this study,we found that KIF21A was distributed in a subset of dendritic spines,and that these KIF21A-positive spines were larger and more structurally plastic than KIF21A-negative ***,the interaction between KIF21A and KANK1 was found to be critical for dendritic spine morphogenesis and synaptic *** of either KIF21A or KANK1 inhibited dendritic spine morphogenesis and dendritic branching,and these deficits were fully rescued by coexpressing full-length KIF21A or KANK1,but not by proteins with mutations disrupting direct binding between KIF21A and KANK1 or binding between KANK1 and *** down KIF21A in the hippocampus of rats inhibited the amplitudes of long-term potentiation induced by high-frequency stimulation and negatively impacted the animals’cognitive *** together,our findings demonstrate the function of KIF21A in modulating spine morphology and provide insight into its role in synaptic function.

关键词： actin cytoskeleton dendrite KANK1 KIF21A microtubule spine morphology spine synaptic plasticity talin1

Hypoxia-preconditioned bone marrow-derived mesenchymal stem cells protect neurons from cardiac arrest-induced pyroptosis

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Neural Regeneration Research 2025年第4期20卷 1103-1123页

作者： Xiahong tang Nan Zheng Qingming Lin yan You Zheng Gong yangping Zhuang Jiali Wu Yu Wang Hanlin Huang Jun Ke Feng Chen Shengli Clinical Medical College of Fujian Medical University Fujian Medical UniversityFuzhouFujian ProvinceChina Department of Emergency Fujian Provincial HospitalFuzhouFujian ProvinceChina Fujian Provincial Key Laboratory of Emergency Medicine FuzhouFujian ProvinceChina The Second Department of Intensive Care Unit Fujian Provincial Hospital South BranchFuzhouFujian ProvinceChina

Cardiac arrest can lead to severe neurological impairment as a result of inflammation,mitochondrial dysfunction,and post-cardiopulmonary resuscitation neurological *** preconditioning has been shown to improve migration and survival of bone marrow–derived mesenchymal stem cells and reduce pyroptosis after cardiac arrest,but the specific mechanisms by which hypoxia-preconditioned bone marrow–derived mesenchymal stem cells protect against brain injury after cardiac arrest are *** this end,we established an in vitro co-culture model of bone marrow–derived mesenchymal stem cells and oxygen–glucose deprived primary neurons and found that hypoxic preconditioning enhanced the protective effect of bone marrow stromal stem cells against neuronal pyroptosis,possibly through inhibition of the MAPK and nuclear factor κB ***,we transplanted hypoxia-preconditioned bone marrow–derived mesenchymal stem cells into the lateral ventricle after the return of spontaneous circulation in an 8-minute cardiac arrest rat model induced by *** results showed that hypoxia-preconditioned bone marrow–derived mesenchymal stem cells significantly reduced cardiac arrest–induced neuronal pyroptosis,oxidative stress,and mitochondrial damage,whereas knockdown of the liver isoform of phosphofructokinase in bone marrow–derived mesenchymal stem cells inhibited these *** conclude,hypoxia-preconditioned bone marrow–derived mesenchymal stem cells offer a promising therapeutic approach for neuronal injury following cardiac arrest,and their beneficial effects are potentially associated with increased expression of the liver isoform of phosphofructokinase following hypoxic preconditioning.

关键词： bone marrow–derived mesenchymal stem cells cardiac arrest cardiac resuscitation hypoxic preconditioning liver isoform of phosphofructokinase mitochondria neuroinflammation oxidative stress pyroptosis reactive oxygen species

血脂异常对ApoE基因缺失小鼠视网膜及Bruch膜的影响

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国际眼科杂志 2011年第9期11卷 1518-1520页

作者：莫亚曾庆华谢礼丹刘小虎唐春燕成都中医药大学附属医院眼科中国四川省成都市610072 成都中医药大学眼科中国四川省成都市610072

目的:研究血脂异常对ApoE基因缺失(apolipoprotein E-deficient,ApoE-/-)小鼠视网膜及Bruch膜的影响。方法:随机将24只2月龄(ApoE-/-)小鼠和24只C57BL/6J小鼠分别分为高脂组和普食组,每组动物12只,喂养4mo后检测其体质量、血浆总胆固醇... 详细信息

目的:研究血脂异常对ApoE基因缺失(apolipoprotein E-deficient,ApoE-/-)小鼠视网膜及Bruch膜的影响。方法:随机将24只2月龄(ApoE-/-)小鼠和24只C57BL/6J小鼠分别分为高脂组和普食组,每组动物12只,喂养4mo后检测其体质量、血浆总胆固醇,视网膜及Bruch膜行光镜和电镜检查。结果:6月龄ApoE-/-高脂组的血浆总胆固醇均显著性高于对照组(P<0.05);6月龄ApoE-/-高脂组外核层厚度、色素上皮细胞层厚度显著低于对照组(P<0.05),而其Bruch膜厚度则显著大于对照组(P<0.05)。结论:血脂异常使ApoE-/-动物的视网膜光感受器细胞、色素上皮细胞及Bruch膜发生病理改变,其改变相似于早期年龄相关性黄斑变性的改变。

关键词：血脂异常 ApoE-/- 光感受器细胞色素上皮细胞 Bruch膜

载脂蛋白E基因与年龄相关性黄斑变性的研究进展

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国际眼科杂志 2012年第1期12卷 62-64页

作者：刘小虎莫亚唐春艳谢礼丹曾庆华成都中医药大学眼科教研室中国四川省成都市610075 成都中医药大学附属医院眼科中国四川省成都市610072

年龄相关性黄斑变性(age-related macular degeneration,AMD)是西方国家首要的不可逆的致盲眼病,随着中国老年化的日益加剧,我国的AMD患者亦日益增加,而其发病机制尚未明确。探讨载脂蛋白E(ApoE)基因与AMD两者之间的内在联系,对AMD的预... 详细信息

年龄相关性黄斑变性(age-related macular degeneration,AMD)是西方国家首要的不可逆的致盲眼病,随着中国老年化的日益加剧,我国的AMD患者亦日益增加,而其发病机制尚未明确。探讨载脂蛋白E(ApoE)基因与AMD两者之间的内在联系,对AMD的预防、诊断及治疗具有重要的临床应用价值。

关键词：年龄相关性黄斑变性载脂蛋白E 模型

Advances in ethnopharmacology,phytochemistry and pharmacology of Erigerontis Herba and its Chinese medicine prescriptions

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Traditional Medicine Research 2025年第1期10卷 44-61页

作者： yang Zhou Yuan-yan Huang Ding-Yue Shang Ying Chen Meng Tian Cheng-Yu Jin Xin Lu Bing-chun yan Han-Qing Pang Institute of Translational Medicine School of MedicineYangzhou UniversityYangzhou 225009China Jiangsu Key Laboratory of Integrated Traditional Chinese and Western Medicine for Prevention and Treatment of Senile Diseases Yangzhou UniversityYangzhou 225009China School of Medicine Nanjing University of Chinese MedicineNanjing 210023China State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources Guangxi Normal UniversityGuiling 541004China.

Erigerontis Herba(EH),the dried whole plant of Erigeron breviscapus,is well-known for circulating blood,activating meridians to alleviate pain,expelling wind,and clearing away *** has been extensively utilized in southern China for the treatment of stroke hemiplegia,chest stuffiness and pains,rheumatic arthralgia,headache,and *** review focuses on the botany,ethnopharmacology,phytochemistry,pharmacology and toxicity of EH and its related prescriptions to offer new insights for prospective research of *** information about EH was retrieved from ancient records and books,PubMed,China National Knowledge Infrastructure,Chinese Pharmacopoeia,Web of Science,Doctoral and Master’s Theses,and various electronic *** is a member of Compositae family and is mainly grown in southern *** Chinese medicine records that EH has the effects of circulating blood and removing blood stasis,expelling wind,and removing cold,as well as relieving rigidity of muscle and relieving *** now,nearly 200 ingredients have been characterized from EH,including flavonoids,caffeoyls,aromatic acids,coumarins,pentacyclic terpenoids,volatile oil and other *** extracts,EH related prescriptions(Dengzhan Xixin injection,Dengzhan Shengmai capsules,etc.)or compounds(scutellarin,scutellarein,etc.)possessed obvious therapeutic effects of ischemic stroke,cerebral hemorrhage,myocardial infarction,Alzheimer’s disease,diabetes and its complications,gastric cancer,bone,and joint degenerative ***,the major active compound of EH,has been used as a quality *** no obvious toxicity of EH has been *** to its traditional applications,ethnopharmacology,phytochemistry,pharmacology,and toxicity,EH was applied as a valuable herb for clinical application in food and medicine *** several compounds have been shown to possess diverse biological activities,the underlying mechanisms of their actions remain *** fully exploi

关键词： Erigeron breviscapus traditional applications ethnopharmacology phytochemistry pharmacology