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Biomimetic Fe_(7)S_(8)/Carbon electrocatalyst from[FeFe]-Hydrogenase for improving pH-Universal electrocatalytic hydrogen production Special Collection:Aggregation-Induced Processes and Functions

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Aggregate 2024年第1期5卷 451-459页

作者： Dohun kim Subramani Surendran Sejin Im Jaehyoung Lim Kyoungsuk Jin ki Tae Nam Uk Sim Department of Energy Science&Engineering Daegu Gyeongbuk Institute of Science&Technology(DGIST)DaeguRepublic of Korea Hydrogen Energy Technology Laboratory Korea Institute of Energy Technology(KENTECH)NajuRepublic of Korea Department of Chemistry Korea UniversitySeoulRepublic of Korea Department of Materials Science and Engineering Seoul National UniversitySeoulRepublic of Korea

Efficient and cost-effective electrocatalysts that can operate across a wide range of pH conditions are essential for green hydrogen *** by biological systems,Fe_(7)S_(8)nanoparticles incorporated on polydopamine matrix electrocatalyst were synthesized by co-precipitation and annealing *** resulting Fe_(7)S_(8)/C electrocatalyst possesses a three-dimensional structure and exhibits enhanced electrocatalytic performance for hydrogen production across various pH ***,the Fe_(7)S_(8)/C electrocatalyst demonstrates exceptional activity,achieving low overpotentials of 90.6,45.9,and 107.4 mV in acidic,neutral,and alkaline environments,*** impedance spectroscopy reveals that Fe_(7)S_(8)/C exhibits the lowest charge transfer resistance under neutral conditions,indicating an improved proton-coupled electron transfer ***-wave electron paramagnetic resonance results confirm a change in the valence state of Fe from 3+to 1+during the hydrogen evolution reaction(HER).These findings closely resemble the behavior of natural[FeFe]-hydrogenase,known for its superior hydrogen production in neutral *** remarkable performance of our Fe_(7)S_(8)/C electrocatalyst opens up new possibilities for utilizing bioinspired materials as catalysts for the HER.

关键词： biomimetic electrocatalyst hydrogen production renewable energy

Stable immobilization of lithium polysulfides using three-dimensional ordered mesoporous Mn_(2)O_(3) as the host material in lithium-sulfur batteries

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Carbon Energy 2024年第6期6卷 99-112页

作者： Sung Joon Park Yun Jeong Choi Hyun-seung kim Min Joo Hong Hongjun Chang Janghyuk Moon young-Jun kim Junyoung Mun ki Jae kim Department of Energy Science Sungkyunkwan UniversitySuwonGyeonggi-doRepublic of Korea Department of Energy Engineering Konkuk UniversitySeoulRepublic of Korea Advanced Batteries Research Center Korea Electronic Technology InstituteSeongnamRepublic of Korea Department of Future Energy Engineering Sungkyunkwan UniversitySuwonRepublic of Korea Department of Energy Systems Engineering Chung-Ang UniversitySeoulRepublic of Korea SKKU Advanced Institute of Nanotechnology Sungkyunkwan UniversitySuwonGyeonggi-doRepublic of Korea SKKU Institute of Energy Science and Technology(SIEST) Sungkyunkwan UniversitySuwonRepublic of Korea School of Advanced Materials Science and Engineering Sungkyunkwan UniversitySuwonRepublic of Korea

Lithium-sulfur batteries(LSBs)have drawn significant attention owing to their high theoretical discharge capacity and energy ***,the dissolution of long-chain polysulfides into the electrolyte during the charge and discharge process(“shuttle effect”)results in fast capacity fading and inferior electrochemical *** this study,Mn_(2)O_(3)with an ordered mesoporous structure(OM-Mn_(2)O_(3))was designed as a cathode host for LSBs via kiT-6 hard templating,to effectively inhibit the polysulfide shuttle ***-Mn_(2)O_(3)offers numerous pores to confine sulfur and tightly anchor the dissolved polysulfides through the combined effects of strong polar-polar interactions,polysulfides,and sulfur chain *** OM-Mn_(2)O_(3)/S composite electrode delivered a discharge capacity of 561 mAh g^(-1) after 250 cycles at 0.5 C owing to the excellent performance of OM-Mn_(2)O_(3).Furthermore,it retained a discharge capacity of 628mA h g^(-1) even at a rate of 2 C,which was significantly higher than that of a pristine sulfur electrode(206mA h g^(-1)).These findings provide a prospective strategy for designing cathode materials for high-performance LSBs.

关键词： host material lithium-sulfur battery ordered mesoporous structure shuttle effect transition-metal oxides

Stoichiometric Ti3C2Tx Coating for Inhibiting Dendrite Growth in Anode-Free Lithium Metal Batteries

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Energy & Environmental Materials 2024年第4期7卷 153-162页

作者： Xiangrong Zeng Manmatha Mahato Woong Oh Hyunjoon Yoo Van Hiep Nguyen Saewoong Oh Geetha Valurouthu Soon-ki Jeong Chi Won Ahn Yury Gogotsi Il-Kwon Oh National Creative Research Initiative for Functionally Antagonistic Nano-Engineering Department of Mechanical Engineering Korea Advanced Institute of Science and Technology (KAIST) Department of Materials Science & Engineering and A. J. Drexel Nanomaterials Institute Drexel University Department of Energy Engineering Soonchunhyang University National Nanofab Center (NNFC) Korea Advanced Institute of Science and Technology (KAIST)

Lithium metal batteries (LMBs) and anode-free LMBs (AFLMBs) present a solution to the need for batteries with a significantly superior theoretical energy ***,their adoption is hindered by low Coulombic efficiency (CE) and rapid capacity fading,primarily due to the formation of unstable solid electrolyte interphase (SEI) layer and Li dendrite growth as a result of uneven Li plating.

关键词： anode-free lithium metal batteries stoichiometric MXene solid electrolyte interphase surface terminations

Clean-DM1, a Korean Polyherbal Formula, Improves High Fat Diet-Induced Diabetic Symptoms in Mice by Regulating IRS/PI3K/AKT and AMPK Expressionsin Pancreas and Liver Tissues

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Chinese Journal of Integrative Medicine 2024年第2期30卷 125-134页

作者： Piao Wang Yi Liu Seok Yong Kang Chenzi Lyu Xiang Han Tianjun Ho Kyung Jae Lee Xianglong Meng Yong-ki Park Hyo Won Jung Department of Herbology College of Korean MedicineDongguk UniversityGyeongju 38066Korea College of Pharmacy&Graduate School of Pharmaceutical Sciences Ewha Womans UniversitySeoul 03760Korea Korean Medicine R&D Center Dongguk UniversityGyeongju 38066Korea Shanxi Key Laboratory of Traditional Herbal Medicines Processing Shanxi University of Chinese MedicineJinzhong(030619)ShanxiProvinceChina

Objective:To investigate the effects of Clean-DM1(C-DM1),a polyherbal formulation of Radix Scrophulariae,Radix Astragali,Rhizoma Atractylodis,and Radix Salviae Miltiorrhizae,on high-fat diet(HFD)-induced diabetes ***:The information about active components of C-DM1 extract and molecular mechanism was obtained from network pharmacology *** compounds of C-DM1 extract by high performance liquid chromatography-mass spectrometry(HPLC-MS)analysis were conducted for quality *** in vivo study,mice were induced diabetes by HFD for 12 *** mice in the normal group(Nor)were maintained with a regular diet and treated with saline by *** HFD model mice were randomly divided into 3 groups,including a HFD diabetic model group,a C-DM1 extract-administered group(C-DM1,500 mg/kg),and metformin-administered groups(Met,500 mg/kg),8 mice in each *** intake,body weight(BW),and fasting blood glucose(FBG)levels were recorded weekly for 4 *** 4 weeks of treatment,alanine aminotransferase(ALT),aspartate aminotransferase(AST),blood glucose,low-density lipoprotein cholesterol(LDL-C)were determined using an automated clinical chemistry analyzer,and homeostatic model for assessing insulin resistance(HOMA-IR)levels and oral glucose tolerance test(OGTT)were *** histopathological changes of liver and pancreatic tissues were observed by hematoxylin-eosin *** receptor substrate(IRS)/phosphatidylinositol 3 kinase(PI3K)/protein kinase B(AKT)and adenosine 5'-monophosphate-activated protein kinase(AMPK)expressions in liver and pancreas tissues were detected by Western blot ***:HPLC-MS identified dihydroisotanshinone,dihydroisotanshinone I,cryptotanshinone,harpagoside,and atractyloside A in C-DM1 *** administration of C-DM1 extract significantly decreased body weight,calorie intake,and the levels of blood glucose and insulin in the diabetic mice(P<0.05 or P<0.01).The C-DM1 extract administration improved the im

关键词： high-fat diet type 2 diabetes mellitus herbal formulation insulin receptor substrate/phosphatidylinositol 3 kinase/protein kinase B adenosine 5'-monophosphate-activated protein kinase network pharmacology high performance liquid chromatography-mass spectrometry analysis

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Astrocytic endothelin-1 overexpression impairs learning and memory ability in ischemic stroke via altered hippocampal neurogenesis and lipid metabolism

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Neural Regeneration Research 2024年第3期19卷 650-656页

作者： Jie Li Wen Jiang Yuefang Cai Zhenqiu Ning Yingying Zhou Chengyi Wang Sookja ki Chung Yan Huang Jingbo Sun Minzhen Deng Lihua Zhou Xiao Cheng Guangzhou University of Traditional Chinese Medicine GuangzhouGuangdong ProvinceChina State Key Laboratory of Dampness Syndrome of Chinese Medicine The Second Affiliated Hospital of Guangzhou University of Chinese MedicineGuangzhouGuangdong ProvinceChina Guangdong Provincial Key Laboratory of Research on Emergency in TCM GuangzhouGuangdong ProvinceChina Department of Anesthesiology West China HospitalSichuan UniversityChengduSichuan ProvinceChina Department of Anatomy Sun Yat-Sen School of MedicineSun Yat-Sen UniversityShenzhenGuangdong ProvinceChina Faculty of Medicine Macao University of Science and TechnologyMacao Special Administration RegionChina

Vascular etiology is the second most prevalent cause of cognitive impairment ***-1,which is produced and secreted by endothelial cells and astrocytes,is implicated in the pathogenesis of ***,the way in which changes in astrocytic endothelin-1 lead to poststroke cognitive deficits following transient middle cerebral artery occlusion is not well ***,using mice in which astrocytic endothelin-1 was overexpressed,we found that the selective overexpression of endothelin-1 by astrocytic cells led to ischemic stroke-related dementia(1 hour of ischemia;7 days,28 days,or 3 months of reperfusion).We also revealed that astrocytic endothelin-1 overexpression contributed to the role of neural stem cell proliferation but impaired neurogenesis in the dentate gyrus of the hippocampus after middle cerebral artery *** proteome profiles and western blot analysis confirmed that levels of glial fibrillary acidic protein and peroxiredoxin 6,which were differentially expressed in the brain,were significantly increased in mice with astrocytic endothelin-1 overexpression in comparison with wild-type mice 28 days after ischemic ***,the levels of the enriched differentially expressed proteins were closely related to lipid metabolism,as indicated by Kyoto Encyclopedia of Genes and Genomes pathway *** chromatography-mass spectrometry nontargeted metabolite profiling of brain tissues showed that astrocytic endothelin-1 overexpression altered lipid metabolism products such as glycerol phosphatidylcholine,sphingomyelin,and phosphatidic ***,this study demonstrates that astrocytic endothelin-1 overexpression can impair hippocampal neurogenesis and that it is correlated with lipid metabolism in poststroke cognitive dysfunction.

关键词： astrocytic endothelin-1 dentate gyrus differentially expressed proteins hippocampus ischemic stroke learning and memory deficits lipid metabolism neural stem cells neurogenesis proliferation

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Eccrine porocarcinoma in the tempus of an elderly woman:A case report

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World Journal of Clinical Cases 2024年第8期12卷 1523-1529页

作者： Zhi-Wei Wu Wen-Jie Zhu Shan Huang Qi Tan Cong you Dian-Gui Hu Long-Nian Li Department of Dermatology First Affiliated Hospital of Gannan Medical UniversityGanzhou 341000Jiangxi ProvinceChina Department of Laser and Cosmetic Dermatology Ganzhou Dermatology HospitalGanzhou 341000Jiangxi ProvinceChina Department of Dermatology Tongxiang Dermatology HospitalJiaxing 314000Zhejiang ProvinceChina Department of Infectious Diseases The Fifth people’s Hospital of GanzhouGanzhou 341000Jiangxi ProvinceChina

BACKGROUND Eccrine porocarcinoma(EPC)is a rare skin tumor that mainly affects the elderly *** often present with slow growth and a good *** are usually distinguished from other skin tumors using histopathology and ***,surgical management alone may be inadequate if the tumor has ***,currently,surgical resection is the most commonly used treatment *** SUMMARY A seventy-four-year-old woman presented with a slow-growing nodule in her left temporal area,with no obvious itching or pain,for more than four *** examination showed small columnar and short spindle-shaped cells;thus,basal cell carcinoma was ***,immunohistochemical analysis revealed the expression of cytokeratin 5/6,p63 protein,p16 protein,and ki-67 antigen(40%),and EPC was taken into *** skin biopsy was repeated,and hematoxylin and eosin staining revealed ductal differentiation in some ***,the patient was diagnosed with EPC,and Mohs micrographic surgery was *** adapted follow-up visits in a year and not found any recurrence of *** This case report emphasizes the diagnosis and differentiation of EPC.

关键词： Eccrine porocarcinoma Sweat gland carcinoma Histopathology Immunohistochemistry Prognosis Case report

氮掺杂对环境空气中TiO_(2)纳米催化剂抗甲醛光催化矿化的影响

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Chinese Journal of Catalysis 2024年第4期59卷 303-323页

作者： Dae-Hwan Lim Aadil Bathla Hassan Anwer Sherif Ayounis Danil WBoukhvalov ki-Hyun kim 汉阳大学土木与环境工程系韩国首尔国立科技大学环境工程系巴基斯坦伊斯兰堡埃及石油研究所分析与评估部埃及开罗南京林业大学材料物理与化学研究所理学院江苏南京乌拉尔联邦大学物理与技术研究所俄罗斯叶卡捷琳堡

通过氮掺杂TiO_(2)(N-TiO_(2))浸渍蜂窝过滤器构建了一系列原型光催化空气净化器(AP(N_(x)-C_(y)))系统,并用于在UV-LED光(1 W)照射条件下光催化分解0.5-5 ppm甲醛(CH_(2)O)蒸汽.在上述催化过滤器系统中,Nx和Cy分别代表N/Ti摩尔比(0-20)... 详细信息

通过氮掺杂TiO_(2)(N-TiO_(2))浸渍蜂窝过滤器构建了一系列原型光催化空气净化器(AP(N_(x)-C_(y)))系统,并用于在UV-LED光(1 W)照射条件下光催化分解0.5-5 ppm甲醛(CH_(2)O)蒸汽.在上述催化过滤器系统中,Nx和Cy分别代表N/Ti摩尔比(0-20)和N-TiO_(2)浓度(2-20 mg mL^(-1)).光催化分解实验结果表明,AP(N_(10)-C_(10))的性能最好,其催化CH2O转化为CO_(2)的转化率最高,循环反应10次后CO_(2)产率仍达到89.2%,在干燥空气中的清洁空气输送速率为9.45 L min^(-1).N10-C10的电荷载流子寿命(τa:1.70 ns)优于其他样品(如纯TiO_(2)的电荷载流子寿命为1.37 ns),这表明N缺陷(No)有助于降低带隙(3.10 eV)和产生氧空位OVs-Ti^(3+),这与密度泛函理论(DFT)模拟结果一致.采用原位漫反射红外傅里叶变换、电子顺磁共振和DFT分析等多种方法研究了CH_(2)O的光催化氧化途径.结果表明,氧化过程涉及多个能量有利的中间步骤(例如CH2O以CH_(2)O_(2)的形式在TiO_(2)-OV{110}表面的桥连O/OH基团上发生放热共价吸附,随后通过催化脱氢/氧化反应直接生成CO_(2):CH_(2)O_(2)/HCOO^(-)+•OH→H_(2)O+CO_(2)).这些步骤与具有N杂质的{101}表面上化学活性Ti原子的态密度计算结果一致.预计No缺陷和OVs的存在将通过降低活化能垒来影响反应能量和中间产物,从而在加湿条件下实现有效的矿化.综上,本文为设计和构建先进的光催化系统,并用于环境空气中醛类挥发性有机物(VOCs)的有效矿化提供了新思路.

关键词：光催化蜂窝过滤器甲醛氮掺杂TiO_(2) 密度泛函理论计算催化反应途径空气净化

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Efficacy of chemotherapy containing bevacizumab in patients with metastatic colorectal cancer according to programmed cell death ligand 1

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World Journal of Gastrointestinal Oncology 2024年第8期16卷 3521-3528页

作者： Shin Woo Kang Sung Hee Lim Min-Ji kim Jeeyun Lee young Suk Park Ho Yeong Lim Won ki Kang Seung Tae kim Division of Hematology Oncology Department of MedicineSamsung Medical CenterSungkyunkwan University School of MedicineSeoul 06351South Korea Samsung Biomedical Research Institute Samsung Medical CenterSeoul 06351South Korea

BACKGROUND Bevacizumab,an anti-vascular endothelial growth factor(VEGF)monoclonal antibody,inhibits angiogenesis and reduces tumor *** VEGF-C,lactate dehydrogenase,and inflammatory markers have been reported as predictive markers related to bevacizumab *** cell death ligand 1(PD-L1)could act upon VEGF receptor 2 to induce cancer cell angiogenesis and *** To investigate the efficacy of bevacizumab-containing chemotherapy in patients with metastatic colorectal cancer(CRC)according to the expression of *** This analysis included CRC patients who received bevacizumab plus FOLFOX or FOLFIRI as first-line therapy between June 24,2014 and February 28,2022,at Samsung Medical Center(Seoul,South Korea).Analysis of patient data included evaluation of PD-L1 expression by the combined positive score(CPS).We analyzed the efficacy of bevacizumab according to PD-L1 expression status in patients with *** A total of 124 patients was included in this *** all patients were treated with bevacizumab plus FOLFIRI or FOLFOX as the first-line *** 77%of patients received FOLFOX,23%received FOLFIRI as backbone first-line *** numbers of patients with a PD-L1 CPS of 1 or more,5 or more,or 10 or more were 105(85%),64(52%),and 32(26%),*** results showed no significant difference in progression-free survival(PFS)and overall survival(OS)with bevacizumab treatment between patients with PDL1 CPS less than 1 and those with PD-L1 CPS of 1 or more(PD-L1<1%vs PD-L1≥1%;PFS:P=0.93,OS:P=0.33),between patients with PD-L1 CPS less than 5 and of 5 or more(PD-L1<5%vs PD-L1≥5%;PFS:P=0.409,OS:P=0.746),and between patients with PD-L1 CPS less than 10 and of 10 or more(PD-L1<10%vs PD-L1≥10%;PFS:P=0.529,OS:P=0.568).CONCLUSION Chemotherapy containing bevacizumab can be considered as first-line therapy in metastatic CRC irrespective of PD-L1 expression.

关键词： Bevacizumab Colorectal cancer Programmed cell death ligand 1 expression First-line chemotherapy Metastatic colorectal cancer

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碱改性铜锰尖晶石室温催化氧化空气中甲醛

Chinese Journal of Catalysis 2024年第5期60卷 337-350页

作者： Yongbiao Hua Kumar Vikrant ki-Hyun kim Philippe M.Heynderickx Danil W.Boukhvalov 汉阳大学土木与环境工程系韩国首尔根特大学国际校区环境与能源研究中心催化与表征材料工程韩国仁川根特大学生物科学工程学院绿色化学与技术系比利时根特京林业大学理学院材料物理与化学研究所江苏南京210037 拉尔联邦大学物理与技术研究所俄罗斯叶卡捷琳堡

甲醛(FA)作为一种有致癌风险的有害污染物,在室内环境中普遍存在.为了高效去除甲醛,催化氧化技术成为了一种既经济又节能的选择,它不仅能降低材料成本(例如避免使用贵金属),也能在无光和室温的条件下进行.本文制备了一种成本效益高的碱... 详细信息

甲醛(FA)作为一种有致癌风险的有害污染物,在室内环境中普遍存在.为了高效去除甲醛,催化氧化技术成为了一种既经济又节能的选择,它不仅能降低材料成本(例如避免使用贵金属),也能在无光和室温的条件下进行.本文制备了一种成本效益高的碱改性锰酸铜尖晶石(CuMn^(2)O_(4))催化剂,并用于甲醛催化氧化反应中.实验结果表明,采用碱(1 mol L^(-1)氢氧化钾)改性的CuMn^(2)O_(4)(1-CuMn^(2)O_(4))作为催化剂,在室温条件下,当甲醛浓度为50 ppm,气体空速为4777 h^(-1)时,甲醛转化率(XFA)达到100%;此外,在甲醛转化率为10%时,其稳态反应速率达到了8.18×10^(-2) mmol g^(-1) h^(-1).原位漫反射红外傅立叶变换光谱结果表明,在催化剂的作用下,甲醛分子经过二氧亚甲基和甲酸酯中间体的转化,最终被氧化为水和二氧化碳.进一步结合密度泛函理论模拟发现,1-CuMn^(2)O_(4)具有较高的催化氧化甲醛性能,可归因于甲醛分子更牢固地吸附在1-CuMn^(2)O_(4)表面,甲醛吸附所需的能量较低,以及最终产物从催化剂表面脱附所需的能量也较低的综合效应.本研究为在无光和室温条件下,高效去除空气中甲醛提供了新型高效、成本效益高且无需贵金属的催化剂,从而为室内空气净化提供了新的科学见解.

关键词：甲醛碱修饰锰酸铜尖晶石催化氧化室内空气