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High MXene loading, nacre-inspired MXene/ANF electromagnetic interference shielding composite films with ultralong strain-tofailure and excellent Joule heating performance

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Nano Research 2024年第3期17卷 2061-2069页

作者： Jiaen Wang Tianliang song Wei Ming Moxi Yele Longfu Chen Hao Zhang xiaojuan Zhang Benliang Liang Guangsheng Wang School of Physical Science and Engineering Beijing Jiaotong UniversityBeijing 100044China College of Chemistry and Materials Engineering Beijing Technology and Business UniversityBeijing 100048China Key Laboratory of Bio-Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191China

The high power density and intelligence of next-generation flexible electronic devices bring many challenges to fabricate flexible composite films with electromagnetic interference(EMI)shielding effectiveness(SE)property and excellent toughness via a simple method.Herein,inspired by the layered structure and biopolymer matrix networks in natural nacre,nacre-like layered Ti_(3)C2TX(MXene)/aramid nanofiber(ANF)films were fabricated through sol-gel,vacuum-assisted filtration,and hot-pressing.Three-dimensional(3D)interconnected aramid nanofibers networks between adjacent layered MXene result in an ultralong strain-to-failure of the film.Even though the functional filler MXene contents are as high as 60 wt.%and 70 wt.%,the strain-to-failure of the films could reach astonishing values of 18.34%±1.86%and 14.43%±1.26%,respectively.And the tensile strength could maintain about 85 MPa.Excitingly,with such a high filler,the film can also withstand double folding and vigorous rubbing without damage,which could better adapt to a harsh application environment.The result means that this work provides a convenient way to prepare other high functional filler composite films with excellent mechanical performance.The EMI SE values could reach 45 and 52.15 dB at 60 wt.%and 70 wt.%MXene in 8.2–12.4 GHz.Meanwhile,the films have prominent Joule heating properties,high sensitivity(<15 s),small voltage operation(0.5 V),and high operation constancy(1300 s).Therefore,nacre-inspired MXene/ANF composite films in this work have ability to apply in many areas including communication technology,military,and aerospace.

关键词： bioinspired aramid nanofiber networks ultralong strain-to-failure toughening mechanism electromagnetic interference shielding

Constructing high-capacity and flexible aqueous zinc-ion batteries with air-recharging capability using organic cathodes

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Chinese Chemical Letters 2024年第3期35卷 468-472页

作者： xiaojuan Chen Haoqi Su Baozhu Yang Xiaocen Liu Xiuting song Lixin Su Gui Yin Qi Liu Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology Advanced Catalysis Green Manufacturing Collaborative Innovation Center and School of Petrochemical EngineeringChangzhou UniversityChangzhou 213164China State Key Laboratory of Coordination Chemistry Nanjing UniversityNanjing 210093China

Flexible aqueous zinc-ion batteries(AZIBs)with air-recharging capability are a promising self-powered system applied in future wearable electronics.It is desired to develop high-capacity air-rechargeable AZIBs.Herein,we developed a flexible AZIB with air-recharging capability based on trinitrohexaazatrinaphthylene(TNHATN)cathode and a ZnSO_(4)electrolyte.The flexible Zn//TNHATN battery exhibits high volumetric energy density(21.36 mWh/cm^3)and excellent mechanical flexibility.Impressing,the discharged flexible Zn//TNHATN battery can be chemical self-charged via the redox reaction between TNHATN cathode and O_(2)from the air.After oxidation in air for 15 h,such flexible Zn//TNHATN battery can deliver a high specific capacity of 320 mAh/g at 0.5 A/g,displaying excellent air-recharging capability.Notably,this flexible Zn//TNHATN battery also works well in chemical or/and galvanostatic charging mixed modes,showing reusability.This work provides a new insight for designing flexible aqueous self-powered systems.

关键词： Aqueous zinc-ion battery Trinitrohexaazatrinaphthylene Organic cathode materials Flexible air-rechargeable battery Self-powered system

Dammarane-type triterpenoids from Gynostemma longipes and their protective activities on hypoxia-induced injury in PC12 cells

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Chinese Journal of Natural Medicines 2024年第5期22卷 466-480页

作者： LIANG Haizhen CHEN xiaojuan LI Qi ZHANG Mengmeng LU Pengxin ZHANG Jie song Juan ZHANG Tao GUO Baolin MA Baiping Department of Pharmaceutical Sciences Beijing Institute of Radiation MedicineBeijing 100850China Institute of Medicinal Plant Development Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100193China AnKang Chia Tai Pharmaceutical Co. Ltd.Shaanxi 725000China

Sixteen new dammarane-type triterpenoid saponins(1-16)featuring diverse structural variations in the side chain at C-17,along with twenty-one known analogues(17-37),have been isolated from the rhizomes of Gynostemma longipes C.Y.Wu,a plant renowned for its medicinal and edible properties.The structural elucidation of these compounds was accomplished through comprehensive analyses of 1D and 2D NMR and HRMS spectroscopic data,supplemented by comparison with previously reported data.Subsequent assays on the isolates for their protective effects against hypoxia-induced damage in pheochromocytoma cells(PC12 cells)revealed that nine saponins exhibited significant anti-hypoxic activities.Further investigation into the anti-hypoxia mechanisms of the representative saponins demonstrated that compounds 22 and 36 markedly reduced the levels of hypoxia-induced apoptosis.Additionally,these compounds were found to decrease the release of lactate dehydrogenase(LDH)and malondialdehyde(MDA),while increasing the activity of superoxide dismutase(SOD),thereby indicating that the saponins could mitigate hypoxia-induced injuries by ameliorating apoptosis and oxidative stress.These findings offer substantial evidence for the future utilization and development of G.longipes,identifying dammarane-type triterpenoid saponins as its active anti-hypoxic constituents.

关键词： Gynostemma longipes Dammarane-type saponins Anti-hypoxia effect Apoptosis

Granulomatosis with polyangiitis presented as multiple cutaneous abscesses after hysterectomy

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Chinese Medical Journal 2024年第6期137卷 755-756页

作者： Xiaoting song Mengrui Li Yinggai song Ping Tu Hang Li Yang Wang Rong Xu Min Chen xiaojuan Yu Suxia Wang Fude Zhou Minghui Zhao Ruoyu Li Xiaoyu Jia Xiaowen Wang Department of Dermatology and Venereology Peking University First HospitalBeijing 100034China Beijing Key Laboratory of Molecular Diagnosis on Dermatoses Beijing 100034China National Clinical Research Center for Skin and Immune Diseases Beijing 100034China Renal Division Department of MedicinePeking University First HospitalBeijing 100034China Institute of Nephrology Peking UniversityBeijing 100034China Key Laboratory of Renal Disease Ministry of Health of ChinaBeijing 100034China Research Units of Diagnosis and Treatment of Immune-mediated Kidney Diseases Chinese Academy of Medical SciencesBeijing 100034China

To the Editor:A 62-year-old woman presented to the dermatology department with a 5-month history of multiple painless cutaneous abscesses and ulcers[Figure 1A],occurring 1 month after a transvaginal hysterectomy due to uterine prolapse.Her general condition was good before and after the surgery,with no abnormal physical signs apart from metroptosis.She reported no fever,night sweat,cough,or abdominal pain,but 10 kg weight-loss.She has no history of diabetes,autoimmune diseases,or chronic infectious diseases.There was no similar illness in her family.

关键词： hysterectomy pain surgery

Global multifaceted biodiversity patterns,centers,and conservation needs in angiosperms

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Science China(Life Sciences) 2024年第4期67卷 817-828页

作者： Ao Luo Yaoqi Li Nawal Shrestha Xiaoting Xu Xiangyan Su Yichao Li Tong Lyu Kilara Waris Zhiyao Tang xiaojuan Liu Luxiang Lin Yongsheng Chen Kuiling Zu Wenqi song Shijia Peng Niklaus E.Zimmermann Loïc Pellissier Zhiheng Wang Institute of Ecology and Key Laboratory for Earth Surface Processes of the Ministry of Education College of Urban and Environmental SciencesPeking UniversityBeijing 100871China Department of Health and Environmental Sciences Xi’an Jiaotong-Liverpool UniversitySuzhou 215123China State Key Laboratory of Grassland Agro-Ecosystems College of EcologyLanzhou UniversityLanzhou 730000China Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education College of Life SciencesSichuan UniversityChengdu 610065China Land Consolidation and Rehabilitation Center Ministry of Natural ResourcesBeijing 100035China State Key Laboratory of Vegetation and Environmental Change Institute of BotanyChinese Academy of SciencesBeijing 100093China CAS Key Laboratory of Tropical Forest Ecology Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesKunming 650201China Swiss Federal Research Institute WSL Birmensdorf 8903Switzerland Department of Environmental Systems Science ETH ZürichZürich 8092Switzerland

The Convention on Biological Diversity seeks to conserve at least 30%of global land and water areas by 2030,which is a challenge but also an opportunity to better preserve biodiversity,including flowering plants(angiosperms).Herein,we compiled a large database on distributions of over 300,000 angiosperm species and the key functional traits of 67,024 species.Using this database,we constructed biodiversity-environment models to predict global patterns of taxonomic,phylogenetic,and functional diversity in terrestrial angiosperms and provide a comprehensive mapping of the three diversity facets.We further evaluated the current protection status of the biodiversity centers of these diversity facets.Our results showed that geographical patterns of the three facets of plant diversity exhibited substantial spatial mismatches and nonoverlapping conservation priorities.Idiosyncratic centers of functional diversity,particularly of herbaceous species,were primarily distributed in temperate regions and under weaker protection compared with other biodiversity centers of taxonomic and phylogenetic facets.Our global assessment of multifaceted biodiversity patterns and centers highlights the insufficiency and unbalanced conservation among the three diversity facets and the two growth forms(woody vs.herbaceous),thus providing directions for guiding the future conservation of global plant diversity.

关键词： angiosperms species richness phylogenetic diversity functional diversity plant traits woody species herbaceous species

Multi-omics analysis of attenuated variant reveals potential evaluation marker of host damaging for SARS-CoV-2 variants

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Science China(Life Sciences) 2024年第1期67卷 83-95页

作者： Guangshan Xie Lin Zhu Siwen Liu Cun Li Xin Diao Yanhao Zhang Xiuli Su Yuanyuan song Guodong Cao Li Zhong Pui Wang xiaojuan Liu Bobo Wing-Yee Mok Shusheng Zhang Dong-Yan Jin Jie Zhou Honglin Chen Zongwei Cai State Key Laboratory of Environmental and Biological Analysis Hong Kong Baptist UniversityHong Kong SARChina State Key Laboratory for Emerging Infectious Diseases and Department of MicrobiologyLi Ka Shing Faculty of MedicineThe University of Hong KongHong Kong SARChina College of Chemistry Zhengzhou UniversityZhengzhou 450001China School of Biomedical Sciences The University of Hong KongHong Kong SARChina HKBU Shenzhen Institute of Research and Continuing Education Shenzhen 518000China

SARS-CoV-2 continues to threaten human society by generating novel variants via mutation and recombination.The high number of mutations that appeared in emerging variants not only enhanced their immune-escaping ability but also made it difficult to predict the pathogenicity and virulence based on viral nucleotide sequences.Molecular markers for evaluating the pathogenicity of new variants are therefore needed.By comparing host responses to wild-type and variants with attenuated pathogenicity at proteome and metabolome levels,six key molecules on the polyamine biosynthesis pathway including putrescine,SAM,dc-SAM,ODC1,SAMS,and SAMDC were found to be differentially upregulated and associated with pathogenicity of variants.To validate our discovery,human airway organoids were subsequently used which recapitulates SARS-CoV-2 replication in the airway epithelial cells of COVID-19 patients.Using ODC1 as a proof-ofconcept,differential activation of polyamine biosynthesis was found to be modulated by the renin-angiotensin system(RAS)and positively associated with ACE2 activity.Further experiments demonstrated that ODC1 expression could be differentially activated upon a panel of SARS-CoV-2 variants of concern(VOCs)and was found to be correlated with each VOCs’pathogenic properties.Particularly,the presented study revealed the discriminative ability of key molecules on polyamine biosynthesis as a predictive marker for virulence evaluation and assessment of SARS-CoV-2 variants in cell or organoid models.Our work,therefore,presented a practical strategy that could be potentially applied as an evaluation tool for the pathogenicity of current and emerging SARS-CoV-2 variants.

关键词： SARS-CoV-2 multi-omics attenuated variant predictive pathogenic marker polyamine biosynthesis

Single-cell characterization of major components of plant cell walls in situ by Raman spectroscopy

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Science China Life Sciences 2024年第8期 1772-1774页

作者： Yujian Li Weiwei Shen Xi Zhang Yaning Cui Yuanyuan Zhao Yayu Guo xiaojuan Li Shuizhong Wang Guoyong song Pu Wang Jianfeng Ma Jinxing Lin State Key Laboratory of Efficient Production of Forest Resources College of Biological Sciences and TechnologyBeijing Forestry University Institute of Tree Development and Genome Editing Beijing Forestry University National Engineering Research Center of Tree Breeding and Ecological Restoration College of Biological Sciences and TechnologyBeijing Forestry University Beijing Key Laboratory of Lignocellulosic Chemistry Engineering Research Center of Forestry Biomass Materials and EnergyMinistry of EducationBeijing Forestry University Beijing Advanced Innovation Center for Biomedical Engineering School of Biological Science and Medical EngineeringBeihang University Key lab of Bamboo and Rattan Science & Technology International Center for Bamboo and Rattan

Dear Editor,Plant cell walls are complex and dynamic structures that are mainly composed of polysaccharide polymers such as cellulose,hemicellulose,and pectin,in addition to substantial amounts of the non-saccharide p...

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Using X-ray computed tomography and micro-Raman spectrometry to measure individual particle surface area, volume, and morphology towards investigating atmospheric heterogeneous reactions

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Journal of Environmental Sciences 2018年第7期30卷 23-32页

作者： Mingjin Wang Nan Zheng Tong Zhu Jing Shang Ting Yu xiaojuan song Defeng Zhao Yong Guan Yangchao Tian BIC-ESAT and SKL-ESPCl College of Environmental Sciences and Engineering Peking University Beijing 100871 China National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029 China

Heterogeneous reactions on the aerosol particle surface in the atmosphere play important roles in air pollution, climate change, and global biogeochemical cycles. However, the reported uptake coefficients of heterogeneous reactions usually have large variations and may not be relevant to real atmospheric conditions. One of the major reasons for this is the use of bulk samples in laboratory experiments, while particles in the atmosphere are suspended individually. A number of technologies have been developed recently to study heterogeneous reactions on the surfaces of individual particles. Precise measurements on the reactive surface area, volume, and morphology of individual particles are necessary for calculating the uptake coefficient, quantifying reactants and products, and understanding the reaction mechanism better. In this study, for the first time we used synchrotron radiation X-ray computed tomography（XCT） and micro-Raman spectrometry to measure individual CaCO_3 particle morphology, with sizes ranging from 3.5–6.5 μm. Particle surface area and volume were calculated using a reconstruction method based on software threedimensional（3-D） rendering. The XCT was first validated with high-resolution fieldemission scanning electron microscopy（FE-SEM） to acquire accurate CaCO_3 particle surface area and volume estimates. Our results showed an average difference of only 6.1% in surface area and 3.2% in volume measured either by micro-Raman spectrometry or X-ray tomography. X-ray tomography and FE-SEM can provide more morphological details of individual Ca CO3 particles than micro-Raman spectrometry. This study demonstrated that X-ray computed tomography and micro-Raman spectrometry can precisely measure the surface area, volume, and morphology of an individual particle.

关键词： Heterogeneous reactions Individual CaCO3 particle Micro-Raman spectrometry Synchrotron radiation X-ray computed tomography Morphology Surface area Volume

改良火针技术联合中医修治疗法治疗多发性跖疣:随机对照试验

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中国针灸 2024年第6期44卷 643-647页

作者：徐纬王松陈娜叶文雄方小娟边可杭州市第三人民医院康复医学科浙江杭州310009 杭州市第三人民医院皮肤科浙江杭州310009

目的:观察改良火针技术联合中医修治疗法治疗多发性跖疣的临床疗效。方法:将70例多发性跖疣患者随机分为观察组(35例,剔除1例)和对照组(35例,脱落2例)。对照组采用中医修治疗法治疗;在对照组的基础上,观察组在皮肤镜引导下于皮损基底部... 详细信息

目的:观察改良火针技术联合中医修治疗法治疗多发性跖疣的临床疗效。方法:将70例多发性跖疣患者随机分为观察组(35例,剔除1例)和对照组(35例,脱落2例)。对照组采用中医修治疗法治疗;在对照组的基础上,观察组在皮肤镜引导下于皮损基底部或血供富集处行火针烙刺。两组治疗均每周1次,3周为一疗程,共治疗2个疗程。分别于治疗前后观察两组患者自拟症状评分、皮肤病生活质量指数(DLQI)评分、典型皮损面积。于治疗后评定两组临床疗效,治疗后2个月评估两组复发情况。结果:治疗后,两组患者自拟症状评分和DLQI评分较治疗前降低、典型皮损面积较治疗前缩小(P<0.05),观察组自拟症状评分和DLQI评分低于对照组、典型皮损面积小于对照组(P<0.05)。观察组总有效率为91.2%(31/34),高于对照组60.6%(20/33,P<0.05)。观察组复发率为6.5%(2/31),低于对照组的35.0%(7/20,P<0.05)。结论:改良火针技术联合中医修治疗法可改善多发性跖疣患者临床症状及生活质量,降低跖疣复发率。

关键词：多发性跖疣火针皮肤镜随机对照试验