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High-temperature corrosion of sintered RE_(2)Si_(2)O_(7)(RE=Yb and Ho)environmental barrier coating materials by volcanic ash

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International Journal of Minerals,Metallurgy and Materials 2024年第7期31卷 1628-1638页

作者： Ayahisa Okawa Son Thanh Nguyen Tadachika Nakayama Thi-mai-Dung Do Hisayuki Suematsu Shu Yin Takuya Hasegawa Tsuneo Suzuki Takashi Goto Koichi Niihara Institute of Multidisciplinary Research for Advanced Materials Tohoku UniversitySendai 980-8577Japan Department of Creative Engineering National Institute of TechnologyKushiro 084-0916Japan Extreme Energy-Density Research Institute Nagaoka University of TechnologyNagaoka 940-2188Japan Advanced Institute for Materials Research(WPI-AIMR) Tohoku UniversitySendai 980-8577Japan

Rare-earth silicates are promising environmental barrier coatings(EBCs)that can protect SiC_(f)/Si C_(m)substrates in next-genera tion gas turbine ***,RE_(2)Si_(2)O_(7)(RE=Yb and Ho)shows potential as an EBC due to its coefficient of thermal expansion(CTE)compatible with substrates and high resistance to water vapor *** target operating temperature for next-generation tur bine blades is 1400°*** is inevitable during adhesion to molten volcanic ash,and thus,understanding the corrosion behavior o the material is crucial to its *** study investigates the high-temperature corrosion behavior of sintered RE_(2)Si_(2)O_(7)(RE=Yb and Ho).Samples were prepared using a solid-state reaction and hot-press *** were then exposed to volcanic ash at 1400°C for 224,and 48 *** 48 h of exposure,volcanic ash did not react with Yb_(2)Si_(2)O_(7)but penetrated its interior,causing *** Ho_(2)Si_(2)O_(7)was partially dissolved in the molten volcanic ash,forming a reaction zone that prevented volcanic ash melts from penetrating the *** increasing heat treatment time,the reaction zone expanded,and the thickness of the acicular apatite grains increased The Ca:Si ratios in the residual volcanic ash were mostly unchanged for Yb_(2)Si_(2)O_(7)but decreased considerably over time for Ho_(2)Si_(2)O_(7).Th Ca in volcanic ash was consumed and formed apatite,indicating that RE^(3+)ions with large ionic radii(Ho>Yb)easily precipitated apatit from the volcanic ash.

关键词： environmental barrier coating volcanic ash rare-earth disilicate corrosion

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Sex differences in the association between the muscle quality index and the incidence of depression: A cross-sectional study

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World Journal of Psychiatry 2024年第9期14卷 1335-1345页

作者： Gui-Ping Huang Li-Ping mai Zhi-Jie Zheng Xi-Pei Wang Guo-Dong He Institute of Medical Research Guangdong Provincial People’s Hospital(Guangdong Academy of Medical Sciences)Southern Medical UniversityGuangzhou 510080Guangdong ProvinceChina

BACKGROUND Depression presents significant challenges to mental health *** phy-sical activity is highly beneficial to mental and physical health,relatively few stu-dies have conducted on the relationship between *** To investigate the association between muscle quality index(MQI)and incidence of *** The data used in this cross-sectional study were obtained from the 2011-2014 National Health and Nutritional Examination Survey,which included informa-tion on MQI,depression,and confounding *** logistic regre-ssion models were employed,while taking into account the complex multi-stage sampling design.A restricted cubic spline model was utilized to investigate the non-linear relationship between the MQI and ***,subgroup analyses were performed to identify influential *** The prevalence of depression in this population was 8.44%.With the adjusted model,the MQI was associated with depression in females(odds ratio=0.68,95%confidence interval:0.49-0.95)but not in males(odds ratio=1.08,95%confidence interval:0.77-1.52).Restricted cubic spline adjustment of all covariates showed a significant negative non-linear relationship between depression and the MQI in *** observed trend indicated an 80%decrease in the risk of depression for each unit increase in MQI,until a value of ***,when the MQI exceeded 2.2,the prevalence of depression increased by 20%for every unit increase in the *** analyses further confirmed that the MQI was negatively associated with *** The MQI was inversely correlated with depression in females but not males,suggesting that females with a higher MQI might decrease the risk of depression.

关键词： Sex differences Muscle quality index Depression National Health and Nutrition Examination Survey Population-based study

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Tuning Structural and Electronic Configuration of FeN_(4) via External S for Enhanced Oxygen Reduction Reaction

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Energy & Environmental Materials 2024年第2期7卷 93-101页

作者： Shidong Li Lixue Xia Jiantao Li Zhuo Chen Wei Zhang Jiexin Zhu Ruohan Yu Fang Liu Sungsik Lee Yan Zhao Liang Zhou Liqiang mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Foshan 528200China Chemical Sciences and Engineering Division Argonne National Laboratory9700 South Cass AvenueLemontIL 60439USA NRC(Nanostructure Research Centre) Wuhan University of TechnologyWuhan 430070China X-ray Science Division Advanced Photon SourcesArgonne National Laboratory9700 South CassAvenueLemontIL 60439USA State Key Laboratory of Silicate Materials for Architectures International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China The Institute of Technological Sciences Wuhan UniversityWuhan 430072China Hubei Longzhong Laboratory Xiangyang 441000China

The Fe-N-C material represents an attractive oxygen reduction reaction electrocatalyst,and the FeN_(4)moiety has been identified as a very competitive catalytic active *** tuning of the coordination structure of FeN_(4)has an essential impact on the catalytic ***,we construct a sulfur-modified Fe-N-C catalyst with controllable local coordination environment,where the Fe is coordinated with four in-plane N and an axial external *** external S atom affects not only the electron distribution but also the spin state of Fe in the FeN_(4)active *** appearance of higher valence states and spin states for Fe demonstrates the increase in unpaired *** the above characteristics,the adsorption and desorption of the reactants at FeN_(4)active sites are optimized,thus promoting the oxygen reduction reaction *** work explores the key point in electronic configuration and coordination environment tuning of FeN_(4)through S doping and provides new insight into the construction of M-N-C-based oxygen reduction reaction catalysts.

关键词： coordination structure electronic configuration FeN_(4)moiety oxygen reduction reaction sulfur doping

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Size-fractionated carbonaceous particles and climate effects in the eastern region of Myanmar

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Particuology 2024年第7期90卷 31-40页

作者： mai Kai Suan Tial Nwe Nwe Kyi Muhammad Amin Mitsuhiko Hata Masami Furuuchi Rahmi Mulia Putri Phakphum Paluang Phuchiwan Suriyawong Worradorn Phairuang Department of Electrical Power Engineering Yangon Technological UniversityYangon11011Myanmar Faculty of Geosciences and Civil Engineering Institute of Science and EngineeringKanazawa UniversityKanazawaIshikawa920-1192Japan Faculty of Engineering Maritim University of Raja Ali HajiTanjung PinangKepulauan Riau 29115Indonesia Graduate School of Natural Science and Technology Kanazawa UniversityKanazawaIshikawa920-1192Japan Department of Geography Faculty of Social SciencesChiang Mai UniversityMuangChiang Mai50200Thailand Research Unit for Energy Economics and Ecological Management Multidisciplinary Research InstituteChiang Mai UniversityMuangChiang Mai50200Thailand

This study reports on an investigation of fine and coarse carbonaceous particulate matters(PM)in Tachileik,eastern Myanmar,during the dry and wet seasons of *** carbon compositions,including organic carbon(OC)and elemental carbon(EC),in each size(PM10-2.5,PM2.5-1.0,and PM1.0-0.5)were determined by a carbon *** average total mass concentration of the three fractions of particle samples during the dry season was higher(51.23±23.86μg/m3)than that of the wet season(14.00±5.26μg/m3).The results indicate that OC and EC levels were highest for PM1.0-0.5 during the dry season and the sizes were similar for both *** OC/EC ratios varied in different seasons,from 1.93 to 4.40 and 4.13 to 5.25 in the dry and wet seasons,*** was sub-divided into char-EC and soot-EC;the char-EC/soot-EC in the dry season was higher than in the wet season,signifying that biomass burning is the main particle source during the dry ***,vehicle emissions dominated during the wet *** effective carbon ratio(ECR)suggested that finer particles contributed more to global *** information is important in terms of air quality control and mitigation in Myanmar and elsewhere.

关键词： Air quality Biomass burning Carbon Coarse particles Fine particles Myanmar

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Oxygen functionalization-assisted anionic exchange toward unique construction of flower-like transition metal chalcogenide embedded carbon fabric for ultra-long life flexible energy storage and conversion

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Carbon Energy 2024年第1期6卷 72-93页

作者： Roshan M.Bhattarai Kisan Chhetri Nghia Le Debendra Acharya Shirjana Saud mai Cao Hoang Phuong Lan Nguyen Sang Jae Kim Young Sun Mok Department of Chemical Engineering Jeju National UniversityJejuRepublic of Korea Department of Nano Convergence Engineering Jeonbuk National UniversityJeonjuRepublic of Korea Regional Leading Research Center(RLRC)for Nanocarbon-based Energy Materials and Application Technology Jeonbuk National UniversityJeonjuRepublic of Korea Department of Chemistry Mississippi State UniversityStarkvilleMississippiUSA Nanomaterials and System Laboratory Department of Mechatronics EngineeringJeju National UniversityJejuRepublic of Korea

The metal-organic framework(MOF)derived Ni–Co–C–N composite alloys(NiCCZ)were“embedded”inside the carbon cloth(CC)strands as opposed to the popular idea of growing them upward to realize ultrastable energy storage and conversion *** NiCCZ was then oxygen functionalized,facilitating the next step of stoichiometric sulfur anion diffusion during hydrothermal sulfurization,generating a flower-like metal hydroxysulfide structure(NiCCZOS)with strong partial implantation inside *** obtained NiCCZOS shows an excellent capacity when tested as a supercapacitor electrode in a three-electrode ***,when paired with the biomass-derived nitrogen-rich activated carbon,the asymmetric supercapacitor device shows almost 100%capacity retention even after 45,000 charge–discharge cycles with remarkable energy density(59.4 Wh kg^(-1)/263.8μWh cm^(–2))owing to a uniquely designed ***,the same electrode performed as an excellent bifunctional water-splitting electrocatalyst with an overpotential of 271 mV for oxygen evolution reaction(OER)and 168.4 mV for hydrogen evolution reaction(HER)at 10 mA cm−2 current density along with 30 h of unhinged chronopotentiometric stability performance for both HER and ***,a unique metal chalcogenide composite electrode/substrate configuration has been proposed as a highly stable electrode material for flexible energy storage and conversion applications.

关键词： carbon cloth energy conversion energy storage flexible metal embedding ultra-stable

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An ultrathin and crack-free metal-organic framework film for effective polysulfide inhibition in lithium-sulfur batteries

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Interdisciplinary Materials 2024年第2期3卷 306-315页

作者： Cheng Zhou Chenxu Dong Weixiao Wang Yu Tian Chunli Shen Kaijian Yan Liqiang mai Xu Xu International School of Materials Science and Engineering Wuhan University of TechnologyWuhanHubeiPeople's Republic of China Department of Chemical Engineering University of Massachusetts AmherstAmherstMassachusettsUSA

Due to their extensive microporous structure,metal-organic frameworks(MOFs)find widespread application in constructing modification layers,functioning as ion ***,the modification layers prepared by existing methods feature gaps between MOFs that are noticeably larger than the inherent MOF pore *** and lithium ions unavoidably permeate through these gaps,hindering the full exploitation of the structural ***,an ultrathin(20 nm)and crack-free MOF film is formed on the separator by atomic layer deposition for the first *** on the separator,the mechanism of different MOF layers has been verified by phase field simulation and in situ Raman *** results accurately prove that the MOF particle layer can relieve the shuttle of polysulfides,but it does not have the effect of homogenizing lithium *** the ultrathin and crack-free MOF film with proper pore size can act as the ion sieve for both polysulfides and lithium *** a result,under the test condition of 2mA cm^(-2)-2 mAh cm^(-2),the overpotential of the Li/Li symmetric battery is only 18 mV after 2500 *** capacity retention rate of the lithium-sulfur battery is 95.6% after 500 cycles and 80% after 1000 cycles at 2 C.

关键词： crack-free film ion sieve lithium-sulfur battery metal-organic framework separator

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全纤维基柔性非对称超级电容器的构建与性能研究

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材料研究与应用 2022年第4期16卷 528-536页

作者：邱美佳孙鹏麦文杰暨南大学物理学系思源实验室广州市真空镀膜技术与新能源材料重点实验室广东省真空镀膜技术与新材料工程技术研究中心广东广州510632

随着可穿戴电子产品需求的不断增长,开发高储能性能且机械稳定性优异的柔性电荷存储设备非常必要。采用简易电沉积法,在柔性的单簇碳纤维(CF)上制备了全纤维基聚苯胺(PANI)和WO_(3)正负极,并匹配成全纤维基柔性非对称超级电容器(ASCs)... 详细信息

随着可穿戴电子产品需求的不断增长,开发高储能性能且机械稳定性优异的柔性电荷存储设备非常必要。采用简易电沉积法,在柔性的单簇碳纤维(CF)上制备了全纤维基聚苯胺(PANI)和WO_(3)正负极,并匹配成全纤维基柔性非对称超级电容器(ASCs)。结果表明:当扫描速率为10 mV∙s^(−1)时,沉积时间为20 min的纳米蠕虫状CF@PANI正极的长度比电容为15.17 mF∙cm^(−1),而沉积时间为5 min的CF@WO_(3)纳米绒毛负极的长度比电容为37.06 mF∙cm^(−1);将二者匹配制成准固态ASCs,该电容器显示出优异的电化学性能及机械稳定性,其长度比电容高达3.89 mF∙cm^(−1),并且具有优异的倍率性能;此外,这种纤维状的储能器件具有优异的力学稳定性,以任何角度进行弯曲或缠绕,其仍能保持电容性能稳定。由于该纤维状器件是基于碳布纤维,所以很容易将其缝制于衣物中作为可穿戴的储能纺织品。综上,这种新型的全纤维基ASCs在未来可穿戴电子设备的应用中具有巨大潜力。

关键词：全纤维基柔性非对称超级电容器力学稳定性

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热蒸镀法制备WO_3薄膜及其电致变色性能

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暨南大学学报（自然科学与医学版） 2014年第2期35卷 196-200页

作者：陈中威强鹏飞杨培华麦文杰李玲暨南大学理工学院物理学系广东广州510632

采用热蒸镀法在氟掺杂的锡氧化物（fluorine-doped tin oxide，FTO）导电玻璃衬底上沉积了一层WO3薄膜，运用X线衍射（XRD）、扫描电子显微镜（SEM）和原子力显微镜（AFM）等手段对样品进行表征，并运用紫外-可见光谱法表征了薄膜样品... 详细信息

采用热蒸镀法在氟掺杂的锡氧化物（fluorine-doped tin oxide，FTO）导电玻璃衬底上沉积了一层WO3薄膜，运用X线衍射（XRD）、扫描电子显微镜（SEM）和原子力显微镜（AFM）等手段对样品进行表征，并运用紫外-可见光谱法表征了薄膜样品的电致变色性能．结果表明，该氧化钨薄膜在外加电压作用下，从褪色态（＋0.9 V）到着色态（-2.0 V），颜色由淡蓝色变为不透明的深蓝色，光透过率（波长为632.8 nm）由～72％下降为～0％，光学调节幅度高达72％，光密度（optical density，OD）变化量达到3，着色/褪色响应速度分别为30/20 s，循环（-1.8 V/＋0.8 V）30周期后变色性能保持良好，综合性能优于目前文献报道．由于该法制备的氧化钨薄膜电致变色综合性能突出，特别是光密度变化量大，在变色玻璃、智能窗户等环保节能领域将有广泛的应用前景．

关键词：三氧化钨薄膜电致变色热蒸镀

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Mimicking aneurysm in a patient with chronic occlusion of the left middle cerebral artery:A case report

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World Journal of Clinical Cases 2024年第22期12卷 5145-5150页

作者： Sen Yang Rong-Kang mai Department of Neurosurgery The Second Affiliated Hospital of Shenzhen UniversityShenzhen 518000Guangdong ProvinceChina

BACKGROUND With the popularization of various cerebrovascular imaging methods and increased attention to the field,more cerebrovascular diseases are being detected in asymptomatic *** cerebrovascular diseases are typically isolated but occasionally occur simultaneously,causing difficulties in diagnosis and *** changes in the collateral circulation of blood vessels in chronic cerebral artery occlusion patients are slow and dynamic,intercepting morphological development at a specific *** reliance on single imaging tests such as digital subtraction cerebral angiography(DSA)can lead to *** SUMMARY We report a 52-year-old male who was admitted to our department for treatment of an unruptured aneurysm during a follow-up examination for brain trauma after 1 *** tomography(CT)scan was negative,but CT angiography(CTA)revealed a sac-like bulge at the bifurcation of the left middle cerebral *** revealed an unruptured aneurysm with unique scapular *** stump of a middle cerebral artery occlusion was observed during exposure during aneurysm clipping surgery,and the diagnosis of chronic cerebral artery occlusion was confirmed *** case was confusing because of the peculiar morphology of the arterial stump and compensatory angiogenesis due to multiple cerebral artery stenoses observed on preoperative CTA and *** surgery did not cause secondary damage to the patient,and medical treatment for risk factors was continued *** Multiple cerebral arterial stenoses can occur in conjunction with aneurysms or arteriovenous malformations,and their unique morphology can lead to misdiagnosis.

关键词： Chronic occlusion Misdiagnosis Aneurysm Collateral circulation Case report

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High expression of GPR160 in prostate cancer is unrelated to CARTp-mediated signaling pathways

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Acta Pharmaceutica Sinica B 2024年第3期14卷 1467-1471页

作者： Chenyu Ye Qingtong Zhou Shi Lin Wensheng Yang Xiaoqing Cai Yiting mai Yanyan Chen Dehua Yang Ming-Wei Wang Department of Pharmacology School of Basic Medical SciencesFudan UniversityShanghai 200032China Research Center for Deepsea Bioresources Sanya 572025China Department of Pharmacy Children’s Hospital of Fudan UniversityNational Children’s Medical CenterShanghai 201102China State Key Laboratory of Chemical Biology Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China The National Center for Drug Screening Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China University of Chinese Academy of Sciences Beijing 100049China Department of Chemistry School of Sciencethe University of TokyoTokyo 113-0033Japan School of Pharmacy Hainan Medical UniversityHaikou 571199China

To the Editor:G protein-coupled receptors(GPCRs)are the largest group of membrane proteins with over 800 members,characteristic of a seven transmembrane *** playing crucial roles in regulation of various physiological processes,GPCRs have been implicated in many diseases including diabetes,obesity,depression and *** initiate different intracellular responses,GPCRs mainly interact with three families of effector proteins upon agonist binding:the heterotrimeric G proteins,G protein-coupled receptor kinases(GRKs)and arrestins1.

关键词： GPR160 CARTp Prostate cancer Signaling pathway

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