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Chinese Science Bulletin 2014年第7期59卷 688-698页

作者： Fan Dong Yuhan Li Wingkei ho Haidong Zhang Min Fu Zho.gbiao Wu Cho.gqing Key Laboratory of Catalysis and Functional Organic Molecules College of Environmental and Biological Engineering Chongqing Technology and Business University Department of Science and Environmental Studies The Hong Kong Institute of Education Department of Environmental Engineering Zhejiang University

A thiourea precursor was employed to synthesize mesoporous carbon nitride(C3 N4) by a thermal polycondensation process with high surface area SiO2 and nanosphere SiO2 as two types of hard templates. The resultant mesoporous C3 N4 samples have high surface areas(105–112 m2/g) and mesopores with narrow sizes distribution(9.3 nm). Photocatalytic performance was evaluated by removal of NO in air under visible light irradiation. The results showed that mesoporous C3 N4 samples exhibited significantly improved photocatalytic activity in comparison with bulk C3 N4, which also exceeded that of N-doped TiO2 and C-doped TiO2. The activity enhancement can be ascribed to the synergistic effects of large surface area and pore volume, enhanced light-harvesting ability, increased redox potential, and reduced recombination of charge carriers. In addition to the high activity, the mesoporous C3 N4 samples also showed high photochemical stability. The mesoporous C3 N4 photocatalysts with enhanced and durable activity could provide a new efficient material for environmental pollution control.

关键词：光催化性能氮化碳介孔高分子高比表面积光催化活性 C3N4 耐用

Extract of buckwheat sprouts scavenges oxidation and inhibits pro-inflammatory mediators in lipopolysaccharide-stimulated macrophages (RAW264.7)

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Journal of Integrative Medicine 2013年第4期11卷 246-252页

作者： Rajendra Karki Cheol-ho Park Dong-Wook Kim Department of Oriental Medicine Resources Mokpo National University Division of Pharmacology and Toxicology School of Pharmacy University of Missouri-Kansas City Department of Bio-health Technology Kangwon National University

OBJECTIVE： Buckwheat has been considered as a potential source of nutraceutical components on the world market of probiotic foodstuffs. The purpose of this study was to evaluate the effects of tartary buckwheat （Fagopyrum tataricum） sprouts on oxidation and pro-inflammatory mediators. METhoDS： The anti-oxidant effects of buckwheat extract （BWE） and rutin were evaluated by using 1,1-diphenyl-2-picrylhydrazyl （DPPH）-and nitric oxide （NO）-scavenging activities, serum peroxidation and chelating assays. Lipopolysaccharide （LPS）-stimulated RAW264.7 cells were used to evaluate anti-inflammatory activities of buckwheat and rutin. NO production in LPS- stimulated RAW264.7 cells was determined by using griess reagent. The expressions of inducible nitric oxide synthase （iNOS）, cyclooxygenase-2 （COX-2）, nuclear factor-kappa B （NF-κB） p65 subunit in cytosolic and nuclear portions were determined by Western blot analysis. Also, the production of inflammatory cytokines interleukin-6 （IL-6） and tumor necrosis factor-α （TNF-α） was determined by enzyme-linked immunosorbent assay. RESULTS： Inhibitory concentration 50 values for DPPH- and NO-scavenging activities of BWE were 24.97 and 72.54 μg/mL respectively. BWE inhibited serum oxidation and possessed chelating activity. Furthermore, BWE inhibited IL-6 and TNF-a production in LPS-stimulated RAW264.7 cells. Also, BWE inhibited iNOS and COX-2 expression and NF-KB p65 translocation. CONCLUSION： Buckwheat sprouts possessed strong antioxidant activity and inhibited production of pro-inflammatory mediators in the applied model systems. Thus, buckwheat can be suggested to be beneficial in inflammatory diseases by inhibiting the free radicals and inflammatory mediators.

关键词： Fagopyrum plant extracts oxidation nitric oxide synthase type II cyclooxygenase 2

Enhanced Li^＋ storage properties of few-layered MoS2-C composite microspheres embedded with Si nanopowder

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Nano Research 2015年第8期8卷 2492-2502页

作者： Seung ho Choi Yun Chan Kang Department of Materials Science and Engineering Korea University Anam-Dong Seongbuk-Gu Seoul 136-713 Republic of Korea

A few-layered MoS2-C composite material is studied as a supporting material for silicon nanopowder. Microspheres of the few-layered MoS2-C composite embedded with 30 wt.% Si nanopowder are prepared by one-pot spray pyrolysis. The Si nanopowder particles with high capacity are completely surrounded by the few-layered MoS2-C composite matrix. The discharge capacities of the MoS2-C composite microspheres with and without 30 wt.% Si nanopowder after 100 cycles are 1,020 and 718 mAh·g^-1 at a current density of 1,000 mA·g^-1 respectively. The spherical morphology of the MoS2-C composite microspheres embedded with Si nanopowder is preserved even after 100 cycles because of their high structural stability during cycling. The MoS2-C composite layer prevents the formation of unstable solid-electrolyte interface （SEI） layers on the Si nanopowder. Furthermore, as the MoS2-C composite matrix exhibits high capacity and excellent cycling performance, these characteristics are also reflected in the MoS2-C composite microspheres embedded with 30 wt.% Si nanopowder.

关键词： molybdenum sulfide silicon anode material lithium batteries spray pyrolysis

Newly developed autoimmune cholangitis without relapse of autoimmune pancreatitis after discontinuing prednisolone

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World Journal of gastroenterology 2012年第41期18卷 5990-5993页

作者： Ji Hun Kim Jae Hyuck Chang Sung Min Nam Mi Jeong Lee Il ho Maeng Jin Young Park Yun Sun Im Tae ho Kim Chang Whan Kim Sok Won Han Department of Internal Medicine College of MedicineThe Catholic University of KoreaSeoul 137-701South Korea

A 57-year-old man presented with a 2-wk history of painless jaundice and weight Iossl he had a large ill- defined enhancing mass-like lesion in the uncinate pro- cess of the pancreas with stricture of the distal common bile duct. Aspiration cytology of the pancreatic mass demonstrated inflammatory cells without evidence of malignancy. Total serum immunoglobulin g level was slightly elevated, but Igg4 level was normal. After the 2-wk 40 mg prednisolone trial, the patient＇s symptoms and bilirubin level improved significantly. A follow-up computed tomography （CT） scan showed a dramatic resolution of the pancreatic lesion. A low dose steroid was continued. After six months he self-discontinued prednisolone for 3 wk, and was presented with jaundice again. ACT scan showed newly developed intrahepatic biliary dilatation and marked concentric wall thickening of the common hepatic duct and the proximal common bile duct without pancreatic aggravation. The patient＇ s Igg4 level was elevated to 2.51 g/L. Prednisolone was started again, after which his serum bilirubin level became normal and the thickening of the bile duct was resolved. This case suggests that autoimmune pancre- atitis can progress to other organs that are not involved at the initial diagnosis, even with sustained pancreatic remission.

关键词： Autoimmune disease Pancreatitis Cholan-gitis Prednisolone

Ultrasonic Plasma Engineering Toward Facile Synthesis of Single-Atom M-N4/N-Doped Carbon(M=Fe,Co) as Superior Oxygen Electrocatalyst in Rechargeable Zinc-Air Batteries

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Nano-Micro Letters 2021年第4期13卷 76-95页

作者： Kai Chen Seonghee Kim Minyeong Je heechae Choi Zhicong Shi Nikola Vladimir Kwang ho Kim Oi Lun Li Department of Materials Science and Engineering Pusan National University30 Jangjeon‑dongGeumjeong‑guBusan 609‑735Republic of Korea Theoretical Materials and Chemistry group Institute of Inorganic ChemistryUniversity of CologneGreinstr.650939 CologneGermany School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006People’s Republic of China Faculty of Mechanical Engineering and Naval Architecture University of ZagrebIvana Lucica 510002 ZagrebCroatia global Frontier R&D Center for Hybrid Interface Materials 30 Jangjeon‑dongGeumjeong‑guBusan 46241Republic of Korea

As bifunctional oxygen evolution/reduction electrocatalysts,transition-metal-based single-atom-doped nitrogen-carbon(NC)matrices are promising successors of the corresponding noblemetal-based catalysts,offering the advantages of ultrahigh atom utilization effciency and surface active ***,the fabrication of such matrices(e.g.,well-dispersed single-atom-doped M-N4/NCs)often requires numerous steps and tedious ***,ultrasonic plasma engineering allows direct carbonization in a precursor solution containing metal phthalocyanine and *** combining with the dispersion effect of ultrasonic waves,we successfully fabricated uniform single-atom M-N4(M=Fe,Co)carbon catalysts with a production rate as high as 10 mg *** Co-N4/NC presented a bifunctional potential drop ofΔE=0.79 V,outperforming the benchmark Pt/C-Ru/C catalyst(ΔE=0.88 V)at the same catalyst *** calculations revealed that Co-N4 was the major active site with superior O2 adsorption-desorption *** a practical Zn-air battery test,the air electrode coated with Co-N4/NC exhibited a specific capacity(762.8 mAh g(-1))and power density(101.62 mW cm^(-2)),exceeding those of Pt/C-Ru/C(700.8 mAh g^(-1) and 89.16 mW cm^(-2),respectively)at the same catalyst ***,for Co-N4/NC,the potential difference increased from 1.16 to 1.47 V after 100 charge-discharge *** proposed innovative and scalable strategy was concluded to be well suited for the fabrication of single-atom-doped carbons as promising bifunctional oxygen evolution/reduction electrocatalysts for metal-air batteries.

关键词： Single-atom-doped M-N4/NC catalyst Plasma engineering ORR/OER bifunctional activity DFT calculation Rechargeable Zn-air battery

大黄素对肠缺血再灌注小鼠肝损伤的影响及ho-1介导的自噬在其中的作用

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中华麻醉学杂志 2024年第7期44卷 856-860页

作者：刘晚丽季拓陈萌徐五星刘印印何祥虎张宗泽武汉大学中南医院麻醉科武汉430071 武汉大学中南医院嘉鱼医院麻醉科咸宁437299

目的评价大黄素对肠缺血再灌注小鼠肝损伤的影响及血红素加氧酶-1(ho-1)介导的自噬在其中的作用。方法SPF级健康雄性C57BL/6小鼠24只,6~8周龄,体质量18~22 g,采用随机数字表法分为4组(n=6):假手术组(Sham组)、肠缺血再灌注组(I/R组)、... 详细信息

目的评价大黄素对肠缺血再灌注小鼠肝损伤的影响及血红素加氧酶-1(ho-1)介导的自噬在其中的作用。方法SPF级健康雄性C57BL/6小鼠24只,6~8周龄,体质量18~22 g,采用随机数字表法分为4组(n=6):假手术组(Sham组)、肠缺血再灌注组(I/R组)、大黄素组(E组)和大黄素+ho-1抑制剂锡原卟啉Ⅸ组(ES组)。采用夹闭肠系膜上动脉45 min再灌注120 min的方法制备小鼠肠缺血再灌注损伤模型。E组缺血前5 d每天灌胃给予大黄素40 mg/kg;ES组缺血前5 d每天灌胃给予大黄素40 mg/kg,缺血前12 h尾静脉注射锡原卟啉Ⅸ7.5 mg/kg。于再灌注120 min时采集眶静脉血样,采用比色法检测血清ALT和AST浓度,随后处死小鼠取肝组织,观察肝组织病理学变化,分别采用WST-1法和TBA法检测SOD活性和MDA含量,荧光定量PCR法测定IL-6 mRNA和TNF-αmRNA的表达,Western blot法检测ho-1、自噬蛋白-苄氯素1(Beclin1)和微管相关蛋白1轻链3(LC3)的表达,计算LC3-Ⅱ/Ⅰ比值。结果与Sham组比较,I/R组肝组织SOD活性降低,MDA含量、血清ALT和AST浓度升高,IL-6 mRNA、TNF-αmRNA和ho-1表达上调,Beclin1表达下调,LC3-Ⅱ/Ⅰ比值降低(Pho-1和Beclin1表达上调,LC3-Ⅱ/Ⅰ比值升高(Pho-1和Beclin1表达下调,LC3-Ⅱ/Ⅰ比值降低(Pho-1介导的自噬有关。

关键词：大黄素血红素加氧酶-1 自噬肠再灌注损伤肝

Electrophoretically deposited binder-free 3-D carbon/sulfur nanocomposite cathode for high-performance Li–S batteries

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Journal of Energy Chemistry 2020年第9期29卷 92-101,I0003页

作者： Sasan ghashghaie Samson ho-Sum Cheng Jie Fang Hafiz Khurram Shahzad Robin Lok-Wang Ma Chi-Yuen Chung Department of Materials Science and Engineering City University of Hong KongHong KongChina Department of Mechanical and Aerospace Engineering The Hong Kong University of Science and TechnologyHong KongChina

In the present study,the electrophoretic deposition method was successfully applied as a binder-free and scalable approach to deposit carbonaceous nanomaterials on carbon fiber paper(CFP)for cathode applications in Li-S *** microstructural studies of the EPD-CNT film using scanning electron microscopy(SEM)revealed the formation of a crack-free and porous layer of CNTs being uniformly distributed on the CFP *** EPD:CFP/CNT/S cathode delivered a capacity around 2.2 times higher than that obtained in the absence of the EPD-CNT film(CFP/S cell)after 50 cycles and a capacity of935 mAh g^-1 after 100 cycles at 0.1 *** EPD method was then employed to fabricate layer-by-layer structures where the EPD-CNT film was decorated with carbon black *** initial capacity as well as the reversible capacity after 100 cycles was further increased by the EPD:CFP/CNT/KB/S layer-by-layer structure to 1473 and 1033 mAh g^-1,respectively,indicating effective suppression of the shuttle *** addition,the rate performance of CFP/S was improved by depositing the EPD-CNT and EPD-CNT/carbon black architectures on CFP surface,and even further enhanced through the co-deposition of CNT and Pt nanoparticles by EPD,delivering a specific capacity of around 730 mAh g^-1 at 1 ***,the cathodes fabricated by EPD were observed to outperform those made by the conventional casting method in terms of cycling performance,internal resistance,and *** difference was ascribed to the non-uniform microstructure of the Cast-CNT film,which resulted in poor interfacial connection between the CNT agglomerates,hindering uniform sulfide/sulfur deposition during *** obtained results suggested that the binder-free C/S nanocomposite cathode made by EPD is key to further enhance the specific capacity and energy density of Li-S batteries.

关键词： Electrophoretic deposition Lithium-sulfur batteries Carbon nanotubes C/S nanocomposite

Monolayer graphitic Carbon Nitride as Metal-Free Catalyst with Enhanced Performance in Photo- and Electro-Catalysis

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Nano-Micro Letters 2022年第3期14卷 308-321页

作者： Huiyan Piao goeun Choi Xiaoyan Jin Seong‑Ju Hwang Young Jae Song Sung‑Pyo Cho Jin‑ho Choy Intelligent Nanohybrid Materials Laboratory(INML) Institute of Tissue Regeneration Engineering(ITREN)Dankook UniversityCheonan 31116Republic of Korea College of Science and Technology Dankook UniversityCheonan 31116Republic of Korea Department of Nanobiomedical Science and BK21 PLUS NBM global Research Center for Regenerative Medicine Dankook UniversityCheonan 31116Republic of Korea Department of Materials Science and Engineering College of EngineeringYonsei UniversitySeoul 03722Republic of Korea SKKU Advanced Institute of Nanotechnology(SAINT) Sungkyunkwan University(SKKU)Suwon 440‑746Republic of Korea Department of Nano Engineering Sungkyunkwan University(SKKU)Suwon 440‑746Republic of Korea National Center for Inter‑University Research Facilities(NCIRF) Seoul National UniversitySeoul 08826Republic of Korea graphene Research Center Advanced Institute of Convergence TechnologySuwon 16229Republic of Korea Department of Pre‑Medical Course College of MedicineDankook UniversityCheonan 31116Republic of Korea Tokyo Tech World Research Hub Initiative(WRHI) Institute of Innovative ResearchTokyo Institute of TechnologyYokohama 226‑8503Japan

The exfoliation of bulk graphitic carbon nitride(g-C_(3)N_(4))into monolayer has been intensively studied to induce maximum sur-face area for fundamental studies,but ended in failure to realize chemi-cally and physically well-defined monolayer of g-C_(3)N_(4)mostly due to the difficulty in reducing the layer thickness down to an atomic *** has,therefore,remained as a challenging issue in two-dimensional(2D)chemistry and physics *** this study,an“atomic monolayer of g-C_(3)N_(4)with perfect two-dimensional limit”was successfully prepared by the chemically well-defined two-step *** atomically resolved monolayer of g-C_(3)N_(4)was also confirmed by spectroscopic and micro-scopic *** addition,the experimental Cs-HRTEM image was collected,for the first time,which was in excellent agreement with the theoretically simulated;the evidence of monolayer of g-C_(3)N_(4)in the perfect 2D limit becomes now clear from the HRTEM image of orderly hexagonal symmetry with a cavity formed by encirclement of three adjacent heptazine *** to bulk g-C_(3)N_(4),the present g-C_(3)N_(4)monolayer showed significantly higher photocatalytic gen-eration of H2O2 and H2,and electrocatalytic oxygen reduction *** addition,its photocatalytic efficiency for H2O2 production was found to be the best for any known g-C_(3)N_(4)nanomaterials,underscoring the remarkable advantage of monolayer formation in optimizing the catalyst performance of g-C_(3)N_(4).

关键词： graphitic carbon nitride Monolayer Atomic image Electro-and photo-catalysis

Quantitative Analysis and Chemical Fingerprint Similarity for Quality Control of the Seeds of Paeonia suffruticosa Andr. by HPLC

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Chemical Research in Chinese Universities 2017年第4期33卷 546-551页

作者： TIAN Xiao YANg Meiqi gUO Sen LIU Qingchao ZHANg Li ho Chi-Tang BAI Naisheng Department of Pharmaceutical Engineering College of Chemical Engineering Northwest University Xi 'an 710069 P. R. China Department of Food Science Rutgers University New Brunswick New Jersey 08901 USA

According to the general Office of the State Council of China, tree peony seeds（TPSs, Paeonia suffruticosa Andr.） are considered an emerging source for edible oil. In Chinese folk medicine, TPSs are used for alleviating waist and leg pain. In the present study, a simple, accurate and rapid fingerprint method based on high performance liquid chromatography with diode array detection（HPLe-DAD） was developed and validated to quantify the profiles of ten representative compounds in TPSs. All standard calibration curves exhibited good linearity（R2〉0.9995） in the I-IPLC-DAD analysis. The recovery of the standards ranged from 96.37% to 102.10%. The results show that stilbe- noids are the major constituents in TPSs, and their total content ranges from 25.71 mg/g to 54.03 mg/g. Suffruticosol A, suffruticosol B, trans-e-viniferm, ampelopsin E and paeoniflorin are the major components in methanol- water（80：20, volume ratio） extracts with average contents of 3.962, 12.264, 5.826, 14.060 and 12.755 rag/g, respec- tively. Additionally, 14 batches of seeds collected from different regions were used to establish a reference fingerprint Their similarity values were higher than 0.944 except for the sample（0.863） from Linxia. These results collectively indicate that the quantitative HPLC fingerprint method can serve as a prerequisite quality control for TPSs, and is a promising resource for developing new herbal or food products.

关键词： Paeonia suffruticosa Andr. Fingerprint High performance liquid chromatography with diode array detec-tion(HPLC-DAD) Quality analysis Similarity

A bi-component polyoxometalate-derivative cathode material showed impressive electrochemical performance for the aqueous zinc-ion batteries

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Chinese Chemical Letters 2022年第8期33卷 3955-3960页

作者： Rui Huang Weiwei Wang Chi Zhang Peng he Yuyang Han Nuo Chen Jun Yan College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China Hunan Provincial Key Laboratory of Chemical Power Sources Central South UniversityChangsha 410083China Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources Central South UniversityChangsha 410083China Hunan Provincial Key Laboratory of Micro&Nano Materials Interface Science Central South UniversityChangsha 410083China Changsha Changjun High School Changsha 410002China

Rechargeable aqueous zinc-ion batteries are recently gaining incremental attention because of low cost and material abundance,but their development is plagued by limited choices of cathode materials with satisfactory cycling *** polyoxometalates perform formidable redox stability and able to participate in multi-electron transfer,which was well-suited for energy ***,a bicomponent polyoxometalate-derivative KNiVO(K_(2)[Ni(H_(2)O)_(6)]_(2)[V_(10)O_(28)]·_(4)H_(2)O polyoxometalates after annealing)is firstly demonstrated as a cathode material for aqueous *** layered KV_(3)O_(8)(KVO)In the bi-component material constitutes Zn^(2+) migration and storage channels(K^(+) were substantially replaced by Zn^(2+) in the activation phase),and the three-dimensional NiV_(3)O_(8)(NiVO)part acts as skeleton to stabilize the ion channels,which assist the cell to demonstrate a high-rate capacity and specific energy of229.4 mAh/g and satisfactory cyclability(capacity retention of 99.1%after 4500 cycles at a current density of 4 A/g).These results prove the feasibility of POM as cathode materials precursor and put forward a novel pattern of the Zn^(2+)storage mechanism in the activated-KNiVO clusters,which also provide a new route for selecting or designing high-performance cathode for aqueous ZIBs and other advanced battery systems.

关键词： Cathode material Aqueous Zn-ion battery Bi-component material Polyoxometalate-derivative Cathodic activation