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Hydrogel bioadhesives harnessing nanoscale phase separation for Achilles tendon repairing

Nano Research 2024年第2期17卷 778-787页

作者： Jun Zhang Xingmei Chen Jingseng Lin pei Zhang Iek Man Lei Yue Tao Jiajun Zhang tian Luo Ji Liu Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055China Research and Innovation Center SKG Health TechnologyShenzhen 518000China SAFE(Shenzhen)Medical Technology Company Limited Shenzhen 518000China Shenzhen Key Laboratory of Biomimetic Robotics and Intelligent Systems Department of Mechanical and Energy EngineeringSouthern University of Science and TechnologyShenzhen 518055China Guangdong Provincial Key Laboratory of Human-Augmentation and Rehabilitation Robotics in Universities Southern University of Science and TechnologyShenzhen 518055China

Repairing Achilles tendon has emerged as a long-standing challenge in the orthopaedic *** suture is the gold standard for re-attaching and repairing the fractured Achilles tendons in clinical surgeries,it is still subjected to numerous adverse side-effects,including chronic inflammatory,tendon tissue re-rupture,scar formation,and post-surgical peritendinous *** this work,we develop a class of hydrogel bioadhesives with tailored nanoscale phase separation for Achilles tendon *** address the existing limitations of sutures,our hydrogel bioadhesives encompass three core functionalities:(i)instant and tough adhesion to Achilles tendon tissues,(ii)extraordinary long-term adhesion robustness under wet and dynamic in vivo conditions,and(iii)anti-postsurgical peritendinous *** our hydrogel bioadhesives with sutures,such kind of integrated approach enables a conformable yet robust biointerface with the tendon tissues,and prevents the fibroblast migration and formation of connective tissues,thus facilitating the tendon *** hydrogel bioadhesives reported here open up new opportunities for the repairing of fractured Achilles tendons in diverse and complicated clinical scenarios.

关键词： hydrogels phase separation bioadhesion robustness tendon repairing

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An alternative approach to improve the compatibility of PCE in cement paste blend with coal gangue powder

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Waste Disposal and Sustainable Energy 2024年第1期6卷 139-150页

作者： Zonglin xie Yuxuan Li Dahui Sun Yi tian Jinyuan Hu Qiang Yuan Zheng Chen School of Civil Engineering Central South UniversityChangshaChina China Railway NO.9 Group CO. LTDShenyangChina National Engineering Research Center for High-Speed Railway Construction Technology ChangshaChina Guangxi Key Laboratory of Disaster Prevention and Engineering Safety Guangxi UniversityNanningChina

Coal gangue(CG)is an environmental waste that faces an urgent demand for disposal in *** utilization of CG in construction materials has broad application prospects and gained increasing ***,the poor compatibility of polycarboxylate superplasticizer(PCE)with CG powder hinders its efficiency in a wide range of ***,this paper attempts to improve the compatibility of PCE with CG powder in cement paste based on the regulation of aggregation and the adsorption behavior of *** light scattering(DLS)and fluorescence spectroscopy tests were carried out to understand the improved *** results indicated that the addition of CG powder increases the ionic strengths of the cement liquid phase,which makes PCE tend to aggregate at a lower concentration compared with no CG powder ***(CH_(3)COO)_(2)Cu is beneficial for enhancing the workability of cement paste by reducing PCE aggregation while maintaining the compressive strength of cement ***,(CH_(3)COO)_(2)Cu extra addition can be regarded as an effective and sustainable way to improve the workability of cement paste with CG powder.

关键词： Coal gangue powder Polycarboxylate superplasticizer Compatibility Aggregation

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Octopus-like DNA nanostructure coupled with graphene oxide enhanced fluorescence anisotropy for hepatitis B virus DNA detection

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Chinese Chemical Letters 2024年第6期35卷 531-535页

作者： Jia-Li xie tian-Jin xie Yu-Jie Luo Kai Mao Cheng-Zhi Huang Yuan-Fang Li Shu-Jun Zhen Key Laboratory of Luminescence Analysis and Molecular Sensing(Southwest University) Ministry of EducationCollege of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China Key Laboratory of Luminescent and Real-Time Analytical Chemistry(Southwest University) Chongqing Science and Technology BureauCollege of Pharmaceutical SciencesSouthwest UniversityChongqing 400715China

Fluorescence Anisotropy(FA)is an effective biochemical detection method based on molecular *** oxide(GO)has been extensively used as an FA ***,the enhancement of FA by GO alone is limited and the strong scattering of GO will easily make the measurement of FA *** order to address these problems,an octopus-like DNA nanostructure(ODN)was designed and coupled with GO to enhance the FA together in this *** mimicking the multi-clawed structure of the octopus,the ODN can be adsorbed on GO tightly,which not only could improve the sensitivity because of the double FA enhancement abilities of GO and ODN,but also could improve the specificity due to the decrease of the nonspecific interaction in complex ***,ODN could maintain a certain distance between the fluorophore and GO to reduce the fluorescence quenching efficiency of GO,which could improve the *** method has been applied for the detection of hepatitis B virus DNA(HBV-DNA)in a range of 1-50 nmol/L and the limit of detection(LOD)was 330 pmol/*** addition,the proposed method has been successfully utilized to detect HBV-DNA in human serum,indicating that this method has a great practical application prospect.

关键词： Fluorescence anisotropy Graphene oxide(GO) Octopus-like DNA nanostructure HBV-DNA

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High recoverable energy density of Na_(0.5)Bi_(0.5)TiO_(3)-based ceramics by multi-scale insulation regulation and relaxor optimization strategy

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Journal of Materiomics 2024年第4期10卷 845-856页

作者： Qiuyu Zheng Bing xie Yahui tian Qi Wang Huajie Luo Zhiyong Liu Haibo Zhang School of Materials Science and Engineering Nanchang Hangkong UniversityNanchang330063China School of Information Engineering Jiangxi University of TechnologyNanchangJiangxi330098China Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing100083China School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan430074China

Dielectric ceramic capacitors(DCCs)are highly desired for advanced electronic and electrical power systems owing to their ultrahigh power densities and fast charge-discharge ***,the low recoverable energy density(Wrec)of dielectric ceramic resulting from the low Weibull breakdown strength(Eb)has been a long-standing ***,we fabricated 0.8Na_(0.5)Bi_(0.5)TiO_(3)–0.2Sm_(1/3)Sr_(1/2)(Mg_(1/3)Nb_(2/3))O_(3)(0.8NBT–0.2SSMN)relaxor ferroelectric(RFE)ceramics display a greatly improved Eb of 480 kV/cm and largely enhanced Wrec of 7.3 J/cm3,far outperforming pure NBT *** demonstrate that the proposed multi-scale insulation regulation strategy via introducing SSMN with optimal content can effectively reduce grain sizes,increase the bandgap,and create a highly insulating second phase,leading to a high ***,the introduction of Sm^(3+)and Mg^(2+)–Nb5+dopants on the A/B-sites of the Na0.5Bi0.5TiO3 lattice created disruptions in the long-range-ordered ferroelectric domains,leading to excellent RFE *** high Eb and excellent RFE property led to the substantial improvement of ***,an exceptional thermal stability of Wrec and efficiency(η)are obtained at 25–200℃(Wrec∼(1.77±0.08)J/cm^(3),η∼82.9%±4.3%).This work offers a route for designing high energy storage performance relaxor ferroelectric ceramics for high-voltage dielectric ceramic capacitors.

关键词： Multi-scale insulation regulation Relaxor ferroelectrics Energy storage performance Thermal stability

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A Secure and Cost-Effective Training Framework Atop Serverless Computing for Object Detection in Blasting

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Computer Modeling in Engineering & Sciences 2024年第5期139卷 2139-2154页

作者： tianming Zhang Zebin Chen Haonan Guo Bojun Ren Quanmin xie Mengke tian Yong Wang Department of Computer and Science Shanghai Jiaotong UniversityShanghai200240China Aerospace System Engineering Shanghai Shanghai200240China State Key Laboratory of Precision Blasting Jianghan UniversityWuhan430056China Beijing Microelectronics Technology Institute Beijing100076China

The data analysis of blasting sites has always been the research goal of relevant *** rise of mobile blasting robots has aroused many researchers’interest in machine learning methods for target detection in the field of *** Computing can provide a variety of computing services for people without hardware foundations and rich software development experience,which has aroused people’s interest in how to use it in the field ofmachine *** this paper,we design a distributedmachine learning training application based on the AWS Lambda *** on data parallelism,the data aggregation and training synchronization in Function as a Service(FaaS)are effectively *** also encrypts the data set,effectively reducing the risk of data *** rent a cloud server and a Lambda,and then we conduct experiments to evaluate our *** results indicate the effectiveness,rapidity,and economy of distributed training on FaaS.

关键词： Serverless computing object detection blasting

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Evaluation of soil erosion vulnerability in Hubei Province of China using RUSLE model and combination weighting method

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Journal of Mountain Science 2024年第10期21卷 3318-3336页

作者： YANG Yanpan tian pei JIA Tinghui WANG Fei YANG Yang HUANG Jianwu Key Laboratory for Geographical Process Analysis&Simulation of Hubei Province Central China Normal UniversityWuhan 430079China College of Urban and Environmental Sciences Central China Normal UniversityWuhan 430079China Department of Civil and Environmental Engineering University of AlbertaEdmontonABT6G 1H9Canada

Soil erosion has been recognized as a critical environmental issue *** previous studies have primarily focused on watershed-scale soil erosion vulnerability from a natural factor perspective,there is a notable gap in understanding the intricate interplay between natural and socio-economic factors,especially in the context of spatial heterogeneity and nonlinear impacts of human-land *** address this,our study evaluates the soil erosion vulnerability at a provincial scale,taking Hubei Province as a case study to explore the combined effects of natural and socio-economic *** developed an evaluation index system based on 15 indicators of soil erosion vulnerability:exposure,sensitivity,and *** addition,the combination weighting method was applied to determine index weights,and the spatial interaction was analyzed using spatial autocorrelation,geographical temporally weighted regression and geographical *** results showed an overall decreasing soil erosion intensity in Hubei Province during 2000 and *** soil erosion vulnerability increased before 2000 and *** areas with high soil erosion vulnerability were mainly confined in the central and southern regions of Hubei Province(Xiantao,tianmen,Qianjiang and Ezhou)with obvious spatial aggregation that intensified over *** factors(habitat quality index)had negative impacts on soil erosion vulnerability,whereas socio-economic factors(population density)showed substantial spatial variability in their *** was a positive correlation between soil erosion vulnerability and erosion intensity,with the correlation coefficients ranging from-0.41 and *** increase of slope was found to enhance the positive correlation between soil erosion vulnerability and intensity.

关键词： Soil erosion vulnerability RUSLE model Combination weighting method Driving factors Spatial heterogeneity

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Brazilin Actuates Ferroptosis in Breast Cancer Cells via p53/SLC7A11/GPX4 Signaling Pathway

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Chinese Journal of Integrative Medicine 2024年第11期30卷 1001-1006页

作者： HE Dan TAN Xiao-ning LI Lin-pei GAO Wen-hui tian Xue-fei ZENG Pu-hua Hunan Academy of Chinese Medicine School of Integrated Chinese and Western Medicine Hunan University of Chinese Medicine Scientific Research Department The Affiliated Hospital of Hunan Academy of Traditional Chinese Medicine Oncology Department The Affiliated Hospital of Hunan Academy of Traditional Chinese Medicine School of Traditional Chinese Medicine Hunan University of Chinese Medicine

Objective:To investigate the mechanism of induction of ferroptosis by brazilin in breast cancer ***:Breast cancer 4T1 cells were divided into 6 groups:control,brazilin 1/2 half maximal inhibitory concentration(IC50),IC50,2×IC50,erastin（10 μg/mL） and capecitabine（10 μg/mL） *** effect of brazilin on the proliferation of 4T1 cells was detected by cell counting kit-8 assay,and the treatment dose of brazilin was *** effect of brazilin on the mitochondrial morphology of 4T1 cells,and the mitochondrial damage was evaluated under electron *** levels of Fe2+,reactive oxygen species（ROS）,malondialdehyde（MDA）,glutathione（GSH） and glutathione peroxidase 4（GPX4） were estimated using various detection *** invasion and migration abilities of 4T1 cells were detected by scratch assay and transwell *** expressions levels of tumor protein p53, solute carrier family 7 member 11（SLC7A11）,GPX4 and acyl-CoA synthetase long-chain family member 4（ACSL4） proteins were quantified by Western blot ***:Compared to the control group,the 10(1/2 IC50),20(IC50) and 40(2×IC50) μg/mL brazilin,erastin,and capecitabine groups showed a significant decrease in the cell survival rate,invasion and migration abilities,GSH,SLC7A11 and GPX4 protein expression levels,and mitochondrial volume and ridge（P<0.05）,and a significant increase in the mitochondria membrane density,Fe2+,ROS and MDA levels,and p53 and ACSL4protein expression levels（P<0.05）.Conclusions:Brazilin actuated ferroptosis in breast cancer cells,and the underlying mechanism is mainly associated with the p53/SLC7A11/GPX4 signaling pathway.

关键词： Chinese medicine brazilin breast cancer ferroptosis p53/SLC7A11/GPX4 axis

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Growth and inhibition of zinc anode dendrites in Zn-air batteries:Model and experiment

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Chinese Journal of Chemical Engineering 2024年第3期67卷 268-281页

作者： Cuiping He Qingyi Gou Yanqing Hou Jianguo Wang Xiang You Ni Yang Lin tian Gang xie Yuanliang Chen Kunming University of Science and Technology State Key Laboratory of Complex Nonferrous Metal Resources Clean UtilizationKunming 650093China Kunming University of Science and Technology Faculty of Metallurgical and Energy EngineeringKunming 650093China China Copper Co.Ltd KunmingYunnan 650051China State Key Laboratory of Advanced Metallurgy for Non-ferrous Metals Kunming 650051China Sichuan Shunying Power Battery Materials Co.Ltd Sichuan 620076China

Zinc(Zn)-air batteries are widely used in secondary battery research owing to their high theoretical energy density,good electrochemical reversibility,stable discharge performance,and low cost of the anode active material ***,the Zn anode also leads to many challenges,including dendrite growth,deformation,and hydrogen precipitation *** this context,Zn dendrite growth has a greater impact on the cycle *** this dissertation,a dendrite growth model for a Zn-air battery was established based on electrochemical phase field theory,and the effects of the charging time,anisotropy strength,and electrolyte temperature on the morphology and growth height of Zn dendrites were studied.A series of experiments was designed with different gradient influencing factors in subsequent experiments to verify the theoretical simulations,including elevated electrolyte temperatures,flowing electrolytes,and pulsed *** simulation results show that the growth of Zn dendrites is controlled mainly by diffusion and mass transfer processes,whereas the electrolyte temperature,flow rate,and interfacial energy anisotropy intensity are the main *** experimental results show that an optimal electrolyte temperature of 343.15 K,an optimal electrolyte flow rate of 40 ml·min^(-1),and an effective pulse charging mode.

关键词： Zn-air battery Zinc anode Zinc dendrite Simulated dendrite growth Inhibit dendrite growth Phase-field model

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Rhodium-catalyzed enantioselective in situ C(sp^(3))-H heteroarylation by a desymmetrization approach

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Chinese Chemical Letters 2024年第10期35卷 218-222页

作者： Yujia Shi Yan Qiao Pengfei xie Miaomiao tian Xingwei Li Junbiao Chang Bingxian Liu State Key Laboratory of Antiviral Drugs NMPA Key Laboratory for Research and Evaluation of Innovative DrugSchool of Chemistry and Chemical EngineeringHenan Normal UniversityPingyuan LaboratoryXinxiang 453007China Department of Pathophysiology School of Basic Medical SciencesZhengzhou UniversityZhengzhou 450001China

A rhodium-catalyzed desymmetrization reaction for enantioselective methyl C-H arylation is achieved by utilizing an in situ arylating reagent via nucleophilic cyclization of o-aminoaryl *** reaction results in chiral indoles containing all-carbon quaternary stereocenters under atmospheric conditions,with a wide range of substrates exhibiting good enantioselectivity(44 examples).Mechnism and DFT studies show that the stereocontrol is reasonably achieved through the collaborative control of a large silicon substituted chiral ligand and C-H···π,LP···πinteractions between aryl rings of the carboxylate group and the *** experiments demonstrate that Rh-aryl bond formation via in situ nucleophilic cyclization is more critical for reaction efficiency than via C-H activation of the nucleophilic cyclization byproduct.

关键词： Heteroarylation C(sp^(3))-H activation Enantioselective Desymmetrization πInteractions

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Tuning hot carrier transfer dynamics by perovskite surface modification

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Chinese Chemical Letters 2024年第10期35卷 457-460页

作者： Chenghao Ge Peng Wang pei Yuan Tai Wu Rongjun Zhao Rong Huang Lin xie Yong Hua School of Materials and Energy Yunnan UniversityKunming 650091China Department of Physics Center for Optoelectronics Engineering ResearchYunnan UniversityKunming 650091China

Understanding the role of perovskite surface passivators in hot carriers transfer dynamics is important to develop highly efficient perovskite solar cells(PSCs).In this work,we have designed and synthesized a naphthalimide-based organic small molecule(NCN)for perovskite surface defect *** reveal that the introduction of NCN not only reduces the density of perovskite defect-state,but also promotes hot carriers(HCs)cooling in perovskite through the transient absorption spectroscopy *** HCs cooling permits HCs transfer from perovskite layer into NCN layer,thus resulting in the decreased charge-carrier recombination in NCN-treated *** expected,the power conversion efficiency(PCE)of PSCs with NCN is enhanced to 22.02%from 19.95%for the control *** findings are relevant for developing highly efficient PSCs.

关键词： Perovskite solar cells Interface passivation Hot carrier Charge recombination Stability Naphthalimide

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