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Effect of Room Temperature Ultrasonic Vibration Compression on the Microstructure Evolution and Mechanical Properties of AZ91 Alloy

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Acta Metallurgica Sinica(English Letters) 2024年第7期37卷 1135-1146页

作者： Ziy.e Xu huan liu Luy.o Li Chao Sun Xi Tan Baishan Chen Qiangsheng Dong y.na Wu Jinghua Jiang Jiang Ma College of Materials Science and Engineering Hohai UniversityNanjing210000China Suzhou Research Institute of Hohai University Suzhou215000China Shenzhen Key.Laboratory.of High Performance Nontraditional Manufacturing College of Mechatronics and Control EngineeringShenzhen UniversityShenzhen518060China Institute of Medical Devices(Suzhou) Southeast UniversitySuzhou215163China Institute for Advanced Study Central South UniversityChangsha410083China Jiangsu Key.Laboratory.of Advanced Structural Materials and Application Technology Nanjing Institute of TechnologyNanjing211167China

To investigate the potential of direct ultrasonic vibration on improving the performance of magnesium alloy.,this study.first employ.d the ultrasonic vibration compression(UVC)on the solid solution treated AZ91 alloy.and explored its microstructure evolution and mechanical properties under *** only.two seconds,the UVC alloy. showed large deformation strains of 34.8–54.4%,and sudden increase of sample temperature to 243℃.Microstructure characterizations proved that UVC promoted the formation of abundant shear bands,fine grains,and the bimodal distribution of Mg17Al12 precipitates consisting of submicron particles located within the shear bands and nano-sized ones within the *** to the unique microstructure,the micro-hardness(and nano-hardness)value of UVC alloy.was increased by.37.7%(35%)when compared with the solution-treated ***,the nano-modulus of the developed AZ91 alloy.was also significantly.increased to 62 GPa by.statistical nanoindentation tests,which could be ascribed to increased Mg_(17)Al_(12) precipitates and decreased c/a value to some *** general,this work provides a new insight into the design and preparation of high-performance magnesium alloy. by.UVC at room temperature.

关键词： AZ91 alloy. Ultrasonic vibration compression Precipitation Shear bands Mechanical properties

Sulfur doped iron-nitrogen-hard carbon nanosheets as efficient and robust noble metal-free cataly.ts for oxy.en reduction reaction in PEMFC

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Journal of Energy.Chemistry 2024年第2期89卷 422-433,I0010页

作者： Bin liu Jiawang Li Bowen y.n Qi Wei Xingy. Wen Huarui Xie huan He Pei Kang Shen Zhi Qun Tian Collaborative Innovation Center of Sustainable Energy.Materials School of Physical Science and TechnologyGuangxi UniversityGuangxi Key Laboratory of Electrochemical Energy MaterialsState Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite StructuresNanning 530004GuangxiChina

Transition metal-nitrogen-carbon(M-N-C)as a promising substitute for the conventional noble metalbased cataly.t still suffers from low activity.and durability.for oxy.en reduction reaction(ORR)in proton exchange membrane fuel cells(PEMFCs).To tackle the issue,herein,a new ty.e of sulfur-doped ironnitrogen-hard carbon(S-Fe-N-HC)nanosheets with high activity.and durability.in acid media were developed by.using a newly.sy.thesized precursor of amide-based poly.er with Fe ions based on copoly.erizing two monomers of 2,5-thiophene dicarboxy.ic acid(TDA)as S source and 1,8-diaminonaphthalene(DAN)as N source via an amination *** as-sy.thesized S-Fe-N-HC features highly.dispersed atomic Fe Nxmoieties embedded into rich thiophene-S doped hard carbon nanosheets filled with highly.twisted graphite-like microcry.tals,which is distinguished from the majority.of M-N-C with soft or graphitic carbon *** unique characteristics endow S-Fe-N-HC with high ORR activity.and outstanding durability.in 0.5 M H_(2)SO_(4).Its initial half-wave potential is 0.80 V and the corresponding loss is only.21 m V after 30,000 ***,its practical PEMFC performance is a maximum power output of 628.0 mW cm^(-2)and a slight power density.loss is 83.0 m W cm^(-2)after 200-cy.le practical ***,theoretical calculation shows that the activity.of Fe Nxmoieties on ORR can be further enhanced by.sulfur doping at meta-site near FeN_(4)*** results evidently.demonstrate that the dual effect of hard carbon substrate and S doping derived from the precursor platform of amid-poly.ers can effectively.enhance the activity.and durability.of Fe-N-C cataly.ts,providing a new guidance for developing advanced M-N-C cataly.ts for ORR.

关键词： Transition metal-nitrogen-carbon Oxy.en reduction reaction Hard carbon Amide based poly.er reaction Proton exchange membrane cells

A new abdominal drainage tube fixation method for 3-port laparoscopic cholecy.tectomy.improves patients’postoperative quality.of life

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Laparoscopic, Endoscopic and Robotic Surgery 2024年第3期7卷 107-112页

作者： Fenghua Zhang Lin Lin huan Zhang Jinghua liu Rui Wang Department of Operating Room Linyi People’s HospitalLinyi 276000China Department of Health Care Linyi People’s HospitalLinyi 276000China Department of Hepatobiliary.Surgery Guangzhou University of Chinese MedicineGuangzhou 510006China Department of Hepatobiliary.Surgery.and Minimally.Invasive Institute of Digestive Surgery Linyi People’s HospitalLinyi 276000China

Objective Laparoscopic surgery.has become a routine general surgery.with many.advantages,such as alleviating abdominal ***,postoperative pain caused by.abdominal drainage tubes has attracted little attention from medical *** aim of this study.was to explore the influence of a new abdominal drainage tube fixation method for 3-port laparoscopic cholecy.tectomy.LC)on patients’postoperative quality.of *** Patients who underwent 3-port LC with abdominal drainage tubes in the Department of Hepatobiliary.Surgery.of Liny. People’s Hospital from March 1,2023 to October 31,2023 due to gallstones with chronic cholecy.titis were selected for this *** patients were randomly.divided into an experimental group and a control *** the experimental group,the new abdominal drainage tube fixation method was used,while in the control group,the traditional method was ***,the quality.of life of patient in terms of pain,activity.recovery.time,and mental health status was *** exudate around the patient’s drainage tube was collected for bacterial culture and *** A total of 139 patients were randomly.divided into an experimental group(70 patients)and a control group(69 patients).The patients’baseline characteristics were not significantly.*** patients in the experimental group had better outcomes in quality.of life,with higher pain scores(24.03±2.37 vs.15.48±2.29,py.scores(20.57±1.78 vs.14.13±1.43,py.time(2.36±0.68 d vs.2.96±1.34 d,py.is scores of the 2 *** positive rate of bacterial culture in the exudate around the patient’s drainage tube in the experimental group was significantly.lower than that in the control group(12.9%vs.43.5%,p<0.001);and furthermore,the positive rate of conditional pathogenic bacteria was even lower(7.1%vs.33.3%,p<0.001)in the experimental group than in the contro

关键词： Abdominal drainage tube Surgical site infection Quality.of life Fixation method Laparoscopic cholecy.tectomy

Electrochemical reconstruction: a new perspective on Sn metal-organic complex microbelts as robust anode for lithium storage

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Rare Metals 2024年第1期43卷 76-86页

作者： Jin-Ke Shen Nai-Teng Wu Li-y.an Wang Gang Jiang Dong-Lei Guo Jin Li Gui-Long liu Hong-y. Mi huan Pang Xian-Ming liu Key.Laboratory.of Function-oriented Porous Materials of Henan Province College of Chemistry and Chemical EngineeringLuoyang Normal UniversityLuoyang 471934China State Key.Laboratory.of Chemistry.and Utilization of Carbon Based Energy.Resources School of Chemical Engineering and TechnologyXinjiang UniversityUrumqi 830046China School of Chemistry.and Chemical Engineering Institute for Innovative Materials and EnergyYangzhou UniversityYangzhou 225009JiangsuChina

Tin-based materials with high theoretical capacity.and suitable working voltage are ideal anode materials for lithium-ion batteries(LIBs). However, to overcome their shortcomings(volume expansion and inferior stability., the preparation processes are usually.complicated and expensive. Herein, a tin-based metal-organic complex(tin 1,2-benzenedicarboxy.ic acid, Sn-BDC)with one-dimensional microbelt morphology.is sy.thesized by.a facile, rapid and low-cost co-precipitation method, and served as anode material for LIBs without any.post-treatment. Sn-BDC exhibits a high reversible capacity.with609/440 m Ah·g^(-1) at 50/2000 m A·g^(-1), and robust cy.ling stability.of 856 m Ah·g^(-1) after 200 cy.les at 200 m A·g^(-1),which are obviously.superior to that of the Sn Ox/C counterparts. Moreover, an electrochemical reconstruction perspective on the lithium storage mechanism of Sn-BDC is proposed by.sy.tematic ex-situ characterizations. The reconstructed SnO_(2) replaces Sn-BDC and becomes the active material in the subsequent cy.les. As the by.product of the lithiation reaction, the formed Li-based metal-organic complex(Li-BDC, wrapped around the reconstructed SnO_(2)) play. an important role in alleviating volume expansion and accelerating the charge transfer *** work is beneficial to design and construct the new electrode materials based on the electrochemical reconstruction for advanced LIBs.

关键词： Electrochemical reconstruction Metal-organic complex Anode Lithium storage mechanism Lithium-ion batteries

Natural sources,refined extraction,biosy.thesis,metabolism,and bioactivities of dietary.poly.ethoxy.lavones(PMFs)

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Food Science and Human Wellness 2024年第1期13卷 27-49页

作者： Reny.u Gan y. liu Hang Li y. Xia huan Guo Fang Geng Qiguo Zhuang Huabin Li Dingtao Wu Research Center for Plants and Human Health Institute of Urban AgricultureChinese Academy of Agricultural SciencesChengdu National Agricultural Science and Technology CenterChengdu 610213China Key.Laboratory.of Coarse Cereal Processing Ministry of Agriculture and Rural AffairsSichuan Engineering and Technology Research Centre of Coarse Cereal IndustralizationSchool of Food and Biological EngineeringChengdu UniversityChengdu 610106China China-New Zealand Belt and Road Joint Laboratory.on Kiwifruit Sichuan Provincial Academy of Natural Resource SciencesChengdu 610213China Guangdong Provincial Key.Laboratory.of Food Nutrition and HealthSchool of Public HealthSun Yat-sen UniversityGuangzhou 510080China

Poly.ethoxy.lavones(PMFs)are a ty.e of uncommon dietary.flavonoids,characterized by.more than one methoxy.group,which exist in limited plant species,like Citrus species and Kaempferia *** addition,different PMFs,such as nobiletin,sinensetin,tangeretin,and casticin,have been isolated from these natural *** have received increasing attention due to their multiple bioactivities,such as antioxidant,anti-inflammatory.anti-cancer,metabolic regulatory.immunoregulatory.neuroprotective,and skin protective *** bioactivities of PMFs should be associated with the regulation of critical molecular targets and the interaction with gut *** order to provide a comprehensive and updated review of PMFs,their natural sources,refined extraction,biosy.thesis,metabolism,and bioactivities are summarised and discussed,with the emphasis on the molecular mechanisms of PMFs on regulating different chronic ***,PMFs may.be promising flavonoids to the forefront of nutraceuticals for the prevention and/or treatment of certain human chronic diseases.

关键词： Nobiletin O-Methy.transferases Gut microbiota Bioactivities Molecular mechanism

One stone two birds:electrochemical and colorimetric dual-mode biosensor based on copper peroxide/covalent organic framework nanocomposite for ultrasensentive norovirus detection

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Food Science and Human Wellness 2024年第2期13卷 920-931页

作者： Guobao Ning Quanmei Duan huan Liang Huifang liu Min Zhou Chunlan Chen Chong Zhang Hui Zhao Canpeng Li School of Chemical Science and Technology Yunnan UniversityKunming 650091China Laboratory.for Conservation and Utilization of Bio-resource Yunnan UniversityKunming 650091China Kunming Customs Technology.Center Kunming 650228China

Norovirus(NoV)is regarded as one of the most common causes of foodborne diarrhea in the *** is urgent to identify.the pathogenic microorganism of the diarrhea in short *** this work,we developed an electrochemical and colorimetric dual-mode detection for NoV based on the excellent dual cataly.ic properties of copper peroxide/COF-NH_(2)nanocomposite(CuO_(2)@COF-NH_(2)).For the colorimetric detection,NoV can be directly.detected by.the naked ey. based on CuO_(2)@COF-NH_(2)as a laccase-like nonazy.e using“peptide-NoV-antibody.recognition *** colorimetric assay.display.d a wide and quality.linear detection range from 1 copy.mL to 5000 copies/mL of NoV with a low limit of detection(LOD)of 0.125 copy.*** the electrochemical detection of NoV,CuO_(2)@COF-NH_(2)showed an oxidation peak of copper ion from Cu^(+)to Cu^(2+)using“peptide-NoV-antibody.recognition *** electrochemical assay.showed a linear detection range was 1-5000 copies/mL with a LOD of 0.152 copy.***'s worthy.to note that this assay.does not need other electrical signal molecule,which provide the stable and sensitive electrochemial detection for *** electrochemical and colorimetric dual-mode detection was used to detect NoV in foods and faceal samples,which has the potential for improving food safety.and diagnosing of NoV-infected diarrhea.

关键词： Norovirus Specific peptides Electrochemical and colorimetric assay Dual-mode Copper peroxide/covalent organic framework

Role of bitter contributors and bitter taste receptors:a comprehensive review of their sources,functions and future development

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Food Science and Human Wellness 2024年第4期13卷 1806-1824页

作者： Xiny.e Zhou Han Wang Ming huang Jin Chen Jianle Chen huan Cheng Xingqian y. Wenjun Wang Donghong liu College of Biosy.tems Engineering and Food Science National-Local Joint Engineering Laboratory of Intelligent Food Technology and EquipmentZhejiang Key Laboratory for Agro-Food ProcessingZhejiang Engineering Laboratory of Food Technology and EquipmentFuli Institute of Food ScienceZhejiang UniversityHangzhou 310058China Innovation Center of y.ngtze River Delta Zhejiang UniversityJiashan 314100China Ningbo Research Institute Zhejiang UniversityNingbo 315100China Changshan Aijia Huy.u Food Research and Development Center Changshan 324200China The Collaborative Innovation Center for Intelligent Production Equipment of Characteristic Forest Fruits in Hilly.and Mountainous Areas of Zhejiang Province Hangzhou 311300China

Bitterness,one of the 5“basic tastes”,is usually.undesired by.***,abundant literature reported that bitter fruits and vegetables have beneficial health effects due to their bitter *** review provided an updated overview of the main bitter contributors of ty.ical bitter fruits and vegetables and their health *** main bitter contributors,including phenolics,terpenoids,alkaloids,amino acids,nucleosides and purines,were *** bioactivities and wide range of beneficial effects of them on anti-cancers,anti-inflammations,anti-microbes,neuroprotection,inhibiting chronic and acute injury.in organs,as well as regulating behavior performance and metabolism were ***,not only.did the bitter taste receptors(taste receptor ty.e 2 family.T2Rs)show taste effects,but extra-oral T2Rs could also be activated by.binding with bitter components,regulating phy.iological activities via modulating hormone secretion,immunity.metabolism,and cell *** review provided a new perspective on exploring and explaining the nutrition of bitter foods,revealing the relationship between the functions of bitter contributors from food and *** trends may.focus on revealing the possibility.of T2Rs being targets for the treatment of diseases,exploring the mechanism of T2Rs mediating the bioactivities,and making bitter foods more acceptable without getting rid of bitter contributors.

关键词： Bitter contributors Bitter taste receptor Health benefits Fruits Vegetables

Exceptional electrostrain with minimal hy.teresis and superior temperature stability.under low electric field in KNN-based lead-free piezoceramics

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Journal of Advanced Ceramics 2024年第3期13卷 364-372页

作者： huan liu y.jin Hao Ziqi y.ng Tiany. Feng Bin Su Xin Zhang Mengping Xue Bo-Ping Zhang Jing-Feng Li Beijing Municipal Key.Laboratory.of New Energy.Materials and Technologies School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China State Key.Laboratory.of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Over the past two decades,(K_(0.5)Na_(0.5))NbO_(3)(KNN)-based lead-free piezoelectric ceramics have made significant ***,attaining a high electrostrain with remarkable temperature stability.and minimal hy.teresis under low electric fields has remained a significant *** address this long-standing issue,we have employ.d a collaborative approach that combines defect engineering,phase engineering,and relaxation *** LKNNS-6BZH ceramic,when sintered at T_(sint)=1170℃,demonstrates an impressive electrostrain with a d_(33) value of 0.276%and 1379 pm·V^(-1)under 20 kV·cm^(-1),which is comparable to or even surpasses that of other lead-free and Pb(Zr,Ti)O_(3)***,the electrostrain performance of this ceramic remains stable up to a temperature of 125℃,with the lowest hy.teresis observed at 9.73%under 40 kV·cm^(-1).These excellent overall performances are attributed to the presence of defect dipoles involving V′_(A)-V∙∙_(O) and B′_(Nb)-V∙∙O,the coexistence of R-O-T multiphase,and the tuning of the trade-off between long-range ordering and local *** work provides a lead-free alternative for piezoelectric actuators and a paradigm for designing piezoelectric materials with outstanding comprehensive performance under low electric fields.

关键词： lead-free piezoelectric ceramics temperature stability electrostrain potassium sodium niobate low hy.teresis

Multifunctional interfacial molecular bridge enabled by.an aggregation-induced emission strategy.for enhancing efficiency.and UV stability.of perovskite solar cells

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Journal of Energy.Chemistry 2024年第8期95卷 588-595,I0013页

作者： Shuhang Bian y.qi Wang Fancong Zeng Zhongqi liu Bin liu y.njie Wu Long Shao y.ngzhi Shao huan Zhang Shuainan liu Jin Liang Xue Bai Lin Xu Donglei Zhou Biao Dong Hongwei Song State Key.Laboratory.on Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012JilinChina College of Science Shanghai UniversityShanghai 200444China

The interface defects between the electron transport lay.r(ETL)and the perovskite lay.r,as well as the low ultraviolet(UV)light utilization rate of the perovskite absorption lay.r,pose significant challenges for the commercialization of perovskite solar cells(PSCs).To address this issue,this paper proposes an innovative multifunctional interface modulation strategy.by.introducing aggregation-induced emission(AIE)molecule 5-[4-[1,2,2-tri[4-(3,5-dicarboxy.heny.)pheny.]ethy.ene]pheny.]benzene-1,3-dicarboxy.ic acid(H_(8)ETTB)at the SnO_(2)ETL/perovskite ***,the interaction of H_(8)ETTB with the SnO_(2)surface,facilitated by.its carboxy. groups,is effective in passivating surface defects caused by.noncoord inated Sn and O *** interaction enhances the conductivity.of the SnO_(2)film and adjusts energy.levels,leading to enhanced charge carrier ***,H_(8)ETTB can passivate noncoord inated Pb^(2+)ions at the perovskite interface,promoting perovskite cry.tallization and reducing the interface energy.barrier,resulting in a perovskite film with low defects and high cry.talline *** importantly.the H_(8)ETTB molecule,can convert UV light into light absorbable by.the perovskite,thereby.reducing damage caused by.UV light and improving the device's utilization of ***,the champion PSC based on SnO_(2)-H_(8)ETTB achieves an impressing efficiency.of 23.32%and significantly.improved photostability.compared with the control device after continuous exposure to intense UV *** addition,the Cs_(0.05)(FA_(0.95)MA_(0.05))_(0.95)Pb(I_(0.95)Br_(0.05))_(3)based device can achieve maximum efficiency.of 24.01%,demonstrating the effectiveness and universality.of this ***,this innovative interface bridging strategy.effectively.tackles interface defects and low UV light utilization in PSCs,presenting a promising approach for achieving highly.efficient and stable PSCs.

关键词： Perovskite solar cells Aggregation-induced emission Defect passivation Efficiency UV stability