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Lightweight foam-like nitrogen-doped carbon nanotube complex achieving highly efficient electromagnetic wave absorption

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Journal of Materials Science & Technology 2024年第1期168卷 114-123页

作者： Zongcheng Li Jin Liang zhiheng Wei Xin Cao Jiahui Shan Chunwei Li Xiaoyi Chen dong zhou Ruizhe Xing Chunjia Luo Jie Kong MOE Key Lab of Materials Physics and Chemistry in Extraordinary Conditions Shaanxi Key Laboratory of Macromolecular Science and TechnologySchool of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China Key laboratory of Flexible Electronics of zhejiang Province Ningbo Institute of Northwestern Polytechnical UniversityNingbo 315103China Polymer Materials and Engineering Department School of Materials Science and EngineeringChang’an UniversityXi’an 710064China

With the increased electromagnetic wave(EMW)threat to military and human health,the develop-ment of EMW-absorbing materials is ***-organic framework derivatives containing magnetic nanoparticles and a carbon matrix are potential candidates for designing efficient EMW-absorbing ***,a zeolitic imidazolate framework-67(ZIF-67)-embedded three-dimensional melamine foam is pyrolyzed to afford carbon foam-based nitrogen-doped carbon nanotube composites,named 3D foam-like CoO/Co/*** CoO/Co particles are confined in the dielectric carbon nanotube *** carbon nanotubes provide considerable conductive loss,while CoO/Co magnetic particles are con-ducive to providing magnetic loss and adjusting impedance ***,the numerous defect structures introduced by heteroatomic doping(nitrogen)cause dipole polarization and simultaneously adjust impedance ***,the unique porous nanotube structure promotes multiple re-flections and scattering of EMWs,further optimizing impedance ***/Co/n-CnTs composites exhibit a minimum reflection loss of−52.3 dB at a matching thickness of 2.0 mm,while the correspond-ing effective absorption bandwidth is 5.28 GHz at a matching thickness of 2.2 *** study reports a novel approach to fabricating a lightweight high-performance EMW-absorbing material.

关键词： Lightweight porous carbon materials Carbon nanotubes CoO/Co magnetic particles Electromagnetic synergistic effect Impedance matching

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I_(2)-DMSO-Mediated Multicomponent [2+1+1+1] Annulation Reaction via Ethyl nitroacetate C-nO_(2), Bond Cleavage as a C1 Synthon: A Route to Multisubstituted 6-Pyrrolidinones Derivatives with a Quaternary Center

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Chinese Journal of Chemistry 2024年第17期42卷 2029-2034页

作者： zhi-Cheng Yu Xi Shen You zhou Xiang-Long Chen Li-Sheng Wang Yan-dong Wu An-Xin Wu national Key Laboratory of Green Pesticide International Joint Research Centerfor Intelligent BiosensorTechnologyand HealthCollegeof ChemistryCentral ChinaNormal UniversityWuhanHubei 430079China

A[2+1+1+1]cyclization reaction has been developed for the synthesis of multisubstituted 6-pyrrolidinones from commercially available aryl methyl ketones,primary amines,and ethyl *** this I_(2)-DMSO-meditated process,the C-nO_(2) bond of ethyl nitroacetate is cleaved,affording a C1 synthon,and the formation of two C-C and two C-n bonds and a quaternary carbon center are constructed in one *** method has good substrate compatibility and permits the late-stage modification of pharmaceutical compounds.

关键词： Cyclization Multisubstituted 6-pyrrolidinones I_(2)-DMSO C1 building blocks Quaternary carbon center Late-stage modification Cracking

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Insight into vertical piezoelectric characteristics regulated thermal transport in van der Waals two-dimensional materials

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Rare Metals 2024年第2期43卷 770-779页

作者： dong-Hai Wei E zhou Jin-Yuan Xu Hui-Min Wang Chen Shen Hong-Bin zh.ng zh.n-zh.n Qin Guang-zhao Qin State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body College of Mechanical and Vehicle EngineeringHunan UniversityChangsha410082China Hunan Key Laboratory for Micro-nano Energy Materials and Device and School of Physics and Optoelectronics Xiangtan UniversityXiangtan411105China Institute of Materials Science Technical University of DarmstadtAlarich-Weiss-Str.264287DarmstadtGermany School of Physics and Microelectronics Zhengzhou UniversityZhengzhou450001China

The urgent demand of extreme(ultra-high/low)thermal conductivity materials is triggered by the high-power device,where exploring the theories and mechanisms of regulating thermal transport properties plays a key ***,we elaborately investigate the effect of vertical(out-of-plane)piezoelectric characteristics on thermal transport,which is historically *** different stacking-order(AA and AB)bilayer boron nitride(Bi-Bn)in two-dimensional(2D)materials are selected as study *** performing state-of-the-art first-principles calculations,it is found that the polarization charge along the out-of-plane orientation ascends significantly with the increasing piezoelectric response in AB stacked Bi-Bn(Bi-Bn-AB)followed by the enhanced interlayer B–n atomic ***,the amplitude of phonon anharmonicity in Bi-Bn-AB increases larger than that in the AA stacked Bi-Bn(Bi-Bn-AA),resulting in the dramatic weakening of the thermal conductivity by 20.34%under 18%*** research reveals the significant role of the vertical(out-of-plane)piezoelectric characteristic in regulating thermal transport and provides new insight into accurately exploring the thermal transport performance of 2D van der Waals materials.

关键词： Thermal conductivity Piezoelectric effect 2D materials Bilayer Bn Strain engineering

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Two polyoxovanadoborates with over 100 nuclei assembled from a {V_(14)Co_(12)B_(72)} cluster

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Science China Chemistry 2024年第8期67卷 2578-2585页

作者： Shuang-Xue Wu Yu-Jiao dong Yang Yang Chao Qin Chun-Yi Sun Wei Guan Xin-Long Wang zh.ng-Min Su Key Laboratory of Polyoxometalate and Reticular Material Chemistry of Ministry of Education Northeast Normal UniversityChangchun 130024China School of Chemistry and Environmental Engineering Changchun University of Science and TechnologyChangchun 130013China Key Laboratory of Advanced Materials of Tropical Island Resources Hainan UniversityHaikou 570228China

Combining theoretical prediction and experimental exploration, the first sandwich-type polyoxovanadoborate(POVB) with an odd number of nuclei, [V_(11)B_(26)O_(73)(OH)_(10)]^(8-)(1), was discovered under hydrothermal conditions. Density-functional theory(DFT)gives a rationalization for the existence of this structure and the structural feature is consistent with the {V_nB_(2n+X)}(X = 2, 4, 6, 8)general formula. Excitingly, when Co and 1,10-phenanthroline(phen) are introduced into the synthesis of vanadoborates system,a 100-nuclei [Co_6(phen)_(10)(H_(2)O)_8][V_(14)Co_(12)B_(72)O_(144)(OH)_(20)]·28H_(2)O(2) and a 102-nuclei [Co_6(phen)_(14)(H_(2)O)_(4)][V_(14)Co_(12)B_(72)O_(144)(OH)_(20)]·23H_(2)O(3) with the same core structure of [V_(14)Co_(12)B_(72)]^(12-)are obtained. The vase-shaped [V_(14)Co_(12)B_(72)] polyanion is a multilayered sandwich-type structure containing seven distinct structural layers and is the largest known POVB. Furthermore, 2demonstrates exceptional thermal and chemical stability and serves as an efficient and stable catalyst for the photoreduction of carbon dioxide.

关键词： boronate metallic materials polyoxovanadoborates density functional theory photocatalysis CO_(2)reduction

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D-band center coordination modulated enzyme-like activity in Fe-Cu dual-metal single-atom nanozymes

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nano Research 2024年第7期17卷 5872-5883页

作者： Ling Liu Shaofang zh.ng Guo Li Yadong zhe Jiamin Liu Xinxu zh.ng Jiahao Wei Xin Sun Yonghui Li Xiao-dong zh.ng Tianjin Key Laboratory of Brain Science and neural Engineering Academy of Medical Engineering and Translational MedicineTianjin UniversityTianjin 300072China Department of Physics and Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology School of SciencesTianjin UniversityTianjin 300350China

After explorations in a diversity of single-atom nanozymes(SAzymes),developing dual-centered SAzymes becomes a promising approach for superior catalytic *** confusing mechanisms including atomic coordination,spatial configuration,and metal–metal atom interaction hinder the development and design of ***,a dual-centered Fe-Cu-n_(x)SAzyme exhibits excellent peroxidase(POD)-and catalase(CAT)-like activities with d-band center(ε_(d))coordination of Fe and Cu in multiple reaction stages,which plays a critical role in the adsorption of H_(2)O_(2)molecule and H_(2)O and O_(2)***,the dband center coordination,which can be represented byε_(d)(Fe)–ε_(d)(Cu)shifts,leads to the competition between one-side and bilateral adsorption,which determines the favorable reaction path with lower energy *** on experimental statistics,simulated formation energies,and reaction barriers,3 configurations,Fe-Cu-n6-I,Fe-Cu-n_(8)-II,and Fe-Cu-n_(8)-III,are modeled and ***,configuration-dependent catalytic selectivity and the competition between one-side and bilateral adsorption can be unveiled by d-band center coordination paradigm *** simulations suggest that the unsymmetrical charge distribution over the three Fe-Cu configurations could tune the adsorption strength compared with the counterparts Fen_(4)and Cun_(4).The present work provides a potential route for optimizing enzyme-like catalysis by designing the dual-or even triple-metal SAzymes,which demonstrates the large space to modulate the metal atomic configuration and interaction.

关键词： single-atom catalysis Fe-Cu dual-metal d-band center coordination enzyme mimicking competitive adsorption mechanisms

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Clinical efficacy and identification of factors confer resistance to afatinib(tyrosine kinase inhibitor)in EGFR-overexpressing esophageal squamous cell carcinoma

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Signal Transduction and Targeted Therapy 2024年第7期9卷 3130-3140页

作者： Yanni Wang Chang Liu Huan Chen Xi Jiao Yujiao Wang Yanshuo Cao Jian Li Xiaotian zh.ng Yu Sun na zhuo Fengxiao dong Mengting Gao Fengyuan Wang Liyuan dong Jifang Gong Tianqi Sun Wei zhu Henghui zh.ng Lin Shen zhihao Lu Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Department of Gastrointestinal OncologyPeking University Cancer Hospital and InstituteBeijingChina Genecast Biotechnology Co. LtdWuxiPR China State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers Beijing Key Laboratory of Carcinogenesis and Translational ResearchDepartment of Gastrointestinal OncologyPeking University Cancer Hospital and InstituteBeijingChina Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education) Department of PathologyPeking University Cancer Hospital and InstituteBeijingChina Precision Scientific(Beijing)Co. Ltd.BeijingChina Generulor Company Bio-X Lab ZhuhaiGuangdongChina Biomedical Innovation Center Beijing Shijitan HospitalCapital Medical UniversityBeijingChina Beijing Key Laboratory for Therapeutic Cancer Vaccines Beijing Shijitan HospitalCapital Medical UniversityBeijingChina

Epidermal growth factor receptor(EGFR)is reportedly overexpressed in most esophageal squamous cell carcinoma(ESCC)patients,but anti-EGFR treatments offer limited survival *** preclinical data showed the promising antitumor activity of afatinib in EGFR-overexpressing *** proof-of-concept,phase II trial assessed the efficacy and safety of afatinib in pretreated metastatic ESCC patients(n=41)with EGFR overexpression(nCT03940976).The study met its primary endpoint,with a confirmed objective response rate(ORR)of 39%in 38 efficacy-evaluable patients and a median overall survival of 7.8 months,with a manageable toxicity *** analysis of pretreatment tumors revealed that neurotrophic receptor tyrosine kinase 2(nTRK2)was negatively associated with afatinib sensitivity and might serve as a predictive biomarker,irrespective of EGFR ***,knocking down or inhibiting nTRK2 sensitized ESCC cells to afatinib *** study provides novel findings on the molecular factors underlying afatinib resistance and indicates that afatinib has the potential to become an important treatment for metastatic ESCC patients.

关键词： esophageal squamous expressing

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Efficient Real-Time Devices Based on Accelerometer UsingMachine Learning for HAR on Low-PerformanceMicrocontrollers

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Computers, Materials and Continua 2024年第1期81卷 1729-1756页

作者： Vi M.-T. Tran D.-n. Thuong V.T. Linh n.n. Tran D.-T. Faculty of Electrical and Electronic Engineering Phenikaa University Hanoi City 100000 Viet Nam Institute of Information Technology Vietnam Academy of Science and Technology Hanoi City 100000 Viet Nam Faculty of Information Technology and Communication Phuong Dong University Hanoi City 100000 Viet Nam Graduate University of Sciences and Technology Vietnam Academy of Science and Technology Hanoi City 100000 Viet Nam International School-Vietnam national University Hanoi City 100000 Viet Nam

Analyzing physical activities through wearable devices is a promising research area for improving health assessment. This research focuses on the development of an affordable and real-time Human Activity Recognition (HAR) system designed to operate on low-performance microcontrollers. The system utilizes data from a bodyworn accelerometer to recognize and classify human activities, providing a cost-effective, easy-to-use, and highly accurate solution. A key challenge addressed in this study is the execution of efficient motion recognition within a resource-constrained environment. The system employs a Random Forest (RF) classifier, which outperforms Gradient Boosting Decision Trees (GBDT), Support VectorMachines (SVM), and K-nearest neighbors (Knn) in terms of accuracy and computational efficiency. The proposed featuresAverage absolute deviation (AAD), Standard deviation (STD), Interquartile range (IQR), Range, and Root mean square (RMS). The research has conducted numerous experiments and comparisons to establish optimal parameters for ensuring system effectiveness, including setting a sampling frequency of 50 Hz and selecting an 8-s window size with a 40% overlap between *** conducted on both theWISDMpublic dataset and a self-collected dataset, focusing on five fundamental daily activities: Standing, Sitting, Jogging,Walking, andWalking the stairs. The results demonstrated high recognition accuracy, with the system achieving 96.7% on the WISDM dataset and 97.13% on the collected dataset. This research confirms the feasibility of deployingHAR systems on low-performance microcontrollers and highlights the system's potential applications in patient support, rehabilitation, and elderly care. © 2024 The Authors. Published by Tech Science Press.

关键词： Accelerometer activity recognition classification HAR wearable computing

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Sepsis one-hour bundle management combined with psychological intervention on negative emotion and sleep quality in patients with sepsis

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World Journal of Psychiatry 2024年第2期14卷 266-275页

作者： Ming Xia Guang-Yan dong Shi-Chao zhu Huan-Min Xing Li-Ming Li Department of Intensive Care Unit Henan Provincial Key Medicine Laboratory of NursingHenan Provincial People’s HospitalZhengzhou University People’s HospitalZhengzhou 450003Henan ProvinceChina Department of nursing Henan Provincial Key Medicine Laboratory of NursingHenan Provincial People’s HospitalZhengzhou University People’s HospitalZhengzhou 450003Henan ProvinceChina

BACKGROUnD Sepsis is a serious infectious disease caused by various systemic inflammatory responses and is ultimately *** usually experience depression and anxiety,which affect their sleep quality and post-traumatic growth *** To investigate the effects of sepsis,a one-hour bundle(H1B)management was combined with psychological intervention in patients with *** This retrospective analysis included 300 patients with sepsis who were admitted to Henan Provincial People’s Hospital between June 2022 and June *** to different intervention methods,the participants were divided into a simple group(SG,n=150)and combined group(CG,n=150).H1B management was used in the SG and H1B management combined with psychological intervention was used in the *** changes of negative emotion,sleep quality and post-traumatic growth and prognosis were compared between the two groups before(T0)and after(T1)*** After intervention(T1),the scores of the Hamilton Anxiety scale and Hamilton Depression scale in the CG were significantly lower than those in the SG(Pncy,daytime dysfunction,sleep disturbance dimension score,and the total score in the CG were significantly lower than those in the SG(Pn of life,mental changes,relationship with others,personal strength dimension score,and total score of the CG were significantly higher than those of the SG(Pntal health,general health status,physiological function,emotional function,physical pain,social function,energy,and physiological function in the CG were significantly higher than those in the SG(Pnical ventilation time,intensive care unit stay time,and 28-d mortality of the CG were significantly lower than those of the SG(PnCLUSIOn H1B management combined with psychological intervention can effectively alleviate the negative emotions of patients with sepsis and inc

关键词： Cluster management Psychological intervention Sepsis negative emotions Sleep quality Post-traumatic growth

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Mesenteric adipose tissue B lymphocytes promote intestinal injury in severe acute pancreatitis by mediating enteric pyroptosis

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Hepatobiliary & Pancreatic Diseases International 2024年第3期23卷 300-309页

作者： Qing Huang Jia-Wen Liu Hai-Bin dong zh.ng-Jie Wei Jin-zhe Liu Yu-Tang Ren Xuan Jiang Bo Jiang Department of Gastroenterology Beijing Tsinghua Changgung HospitalSchool of Clinical MedicineTsinghua UniversityBeijing 102218China

Background:Visceral adipose tissue(VAT)has been linked to the severe acute pancreatitis(SAP)prognosis,although the underlying mechanism remains *** has been reported that pyroptosis worsens *** present study aimed to verify whether mesenteric adipose tissue(MAT,a component of VAT)can cause secondary intestinal injury through the pyroptotic ***:Thirty-six male Sprague Dawley(SD)rats were divided into six different *** rats were randomly divided into the SAP and control *** monitored the changes of MAT and B lymphocytes infiltration in MAT of SAP *** SAP rats were injected with MAT B lymphocytes or phosphate buffer solution(PBS).The remaining twelve SAP rats were first injected with MAT B lymphocytes,and then with MCC950(nLRP3 inhibitor)or *** collected blood and tissue samples from pancreas,gut and MAT for ***:Compared to the control rats,the SAP group showed inflammation in MAT,including higher expression of tumor necrosis factor(TnF-α)and interleukin-6(IL-6),lower expression of IL-10,and histological *** cytometry analysis revealed B lymphocytes infiltration in MAT but not T lymphocytes and *** SAP rats also exhibited intestinal injury,characterized by lower expression of zonula occludens-1(ZO-1)and occludin,higher levels of lipopolysaccharide and diamine oxidase,and pathological *** expression of nLRP3 and n-GSDMD,which are responsible for pyroptosis,was increased in the intestine of SAP *** injection of MAT B lymphocytes into SAP rats exacerbated the inflammation in *** upregulation of pyroptosis reduced tight junction in the intestine,which contributed to the SAP progression,including higher inflammatory indicators and worse histological *** administration of MCC950 to SAP+MAT B rats downregulated pyroptosis,which subsequently improved the intestinal barrier and ameliorated inflammatory response of ***:In SAP,MAT B lymphocytes aggravated local

关键词： Acute pancreatitis Mesenteric adipose tissue B lymphocyte Intestinal barrier Pyroptosis

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Reynosin protects neuronal cells from microglial neuroinflammation by suppressing nLRP3 inflammasome activation mediated by nADPH oxidase

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Chinese Journal of natural Medicines 2024年第6期22卷 486-500页

作者： YAnG Yanqiu CHE Yue FAnG Mingxia YAO Xiaohu zhOU Di WAnG Feng CHEn Gang LIAnG dong LI ning HOU Yue Key Laboratory of Bioresource Research and Development of Liaoning Province College of Life and Health SciencesNorth-eastern UniversityShenyang 110000China national Frontiers Science Center for Industrial Intelligence and Systems Optimization Key Laboratory of Data Analytics and Optimization for Smart IndustryMinistry of EducationNortheastern UniversityShenyang 110000China School of Traditional Chinese Materia Medica Key Laboratory of Innovative Traditional Chinese Medicine for Major Chronic Diseases of Liaoning provinceKey Laboratory for TCM Material Basis Study and Innovative Drug Development of Shenyang CityShenyang Pharmaceutical UniversityShenyang 110000China State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources School of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin 541000China

neuroinflammation,mediated by the nucleotide-binding oligomerization domain-like receptor family pyrin domain-containing-3(nLRP3)inflammasome,is a significant contributor to the pathogenesis of neurodegenerative diseases(nDDs).Reynos-in,a natural sesquiterpene lactone(SL),exhibits a broad spectrum of pharmacological effects,suggesting its potential therapeutic ***,the effects and mechanism of reynosin on neuroinflammation remain *** current study explores the effects and mechanisms of reynosin on neuroinflammation using mice and BV-2 microglial cells treated with lipopolysaccharide(LPS).Our findings reveal that reynosin effectively reduces microglial inflammation in vitro,as demonstrated by decreased CD11b expression and lowered interleukin-1 beta(IL-1β)and interleukin-18(IL-18)mRnA and protein ***,in vivo,results showed a re-duction in the number of Iba-1 positive cells and alleviation of morphological alterations,alongside decreased expressions of IL-1βand *** analysis indicates that reynosin inhibits nLRP3 inflammasome activation,evidenced by reduced transcription of nLRP3 and caspase-1,diminished nLRP3 protein expression,inhibited apoptosis-associated speck-like protein containing a CARD(ASC)oli-gomerization,and decreased caspase-1 ***,reynosin curtailed the activation of nicotinamide adenine dinuc-leotide phosphate(nADPH)oxidase,demonstrated by reduced nADP^(+)and nADPH levels,downregulation of gp91^(phox) mRnA,pro-tein expression,suppression of p47^(phox) expression and translocation to the ***,reynosin exhibited a neuroprotective effect against microglial inflammation in vivo and in *** collective findings underscore reynosin’s capacity to mitigate mi-croglial inflammation by inhibiting the nLRP3 inflammasome,thus highlighting its potential as a therapeutic agent for managing neuroinflammation.

关键词： Microglia nLRP3 inflammasome Reactive oxygen species nADPH oxidase neuron Reynosin

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