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Hyperreflective photonic crystals created by shearing colloidal dispersions at ultrahigh volume fraction

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microsystems & Nanoengineering 2024年第1期10卷 161-173页

作者： minji kim Jong Bin kim Shin-Hyun kim Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea

Colloidal crystallization serves as one of the most economic and scalable production methods for photonic ***,insufficient optical performance,nonuniformity and low reproducibility remain challenges for advanced high-value *** this study,we optimally formulate a photocurable dispersion of silica particles and apply shear flow to unify the orientation of the colloidal crystals,ensuring high optical performance and *** silica particles experience strong repulsion at ultrahigh volume fractions of 50%but demonstrate low mobility,leading to polycrystalline *** shear flow to the dispersions allows the silica particles to rearrange into larger crystalline domains with a unidirectional orientation along the *** shear-induced structural change produces absolute reflectivity at the stopband as high as 90%and a high transparency of 90%at off-resonant wavelengths with minimal diffusive ***,the strong interparticle repulsion ensures a uniform volume fraction of particles throughout the dispersion,reducing deviations in the optical *** intricately micropattern the photocurable dispersions using ***,the photonic films and patterns can be stacked to form multiple layers,displaying mixed structural colors and multiple reflectance peaks without sacrificing *** superior photonic materials hold promise for various optical applications,including optical components and anticounterfeiting patches.

关键词： properties. dispersion reflectivity

导管引导下硬化疗法治疗卵巢子宫内膜异位囊肿:短期疗效

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国际医学放射学杂志 2019年第1期 116-116页

作者： K.Han S.K.Seo m.D.kim g.m.kim J.H.Kwon H.J.kim 蒋天 Department of Radiology Severance HospitalResearch Institute of Radiological ScienceYonsei University College of Medicine

摘要目的评估用95%乙醇行导管引导下硬化疗法(CDS)治疗原发或复发卵巢子宫内膜异位囊肿病人的有效性。材料与方法前瞻性纳入2015年3月—2017年12月期

关键词：卵巢子宫内膜异位囊肿导管引导硬化疗法

Investigation of the nutritional and functional roles of a combinational use of xylanase and β-glucanase on intestinal health and growth of nursery pigs

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Journal of Animal Science and Biotechnology 2024年第5期15卷 1932-1950页

作者： Hyunjun Choi Yesid garavito Duarte guilherme A.m.Pasquali Sung Woo kim Department of Animal Science North Carolina State University116 Polk HallCampus Box 7621RaleighNC 27695USA BASF SE Ludwigshafen 67056Germany

Background Xylanase andβ-glucanase combination(Xg)hydrolyzes soluble non-starch polysaccharides that are anti-nutritional *** study aimed to evaluate the effects of increasing levels of Xg on intestinal health and growth performance of nursery *** Forty pigs(6.5±0.4 kg)were assigned to 5 dietary treatments and fed for 35 d in 3 phases(11,9,and 15 d,respectively).Basal diets mainly included corn,soybean meal,and corn distiller's dried grains with solubles,contained phytase(750 FTU/kg),and were supplemented with 5 levels of Xg at(1)0,(2)280 TXU/kg xylanase and 125 TgU/kgβ-glucanase,(3)560 and 250,(4)840 and 375,or(5)1,120 and 500,*** performance was *** d 35,all pigs were euthanized and jejunal mucosa,jejunal digesta,jejunal tissues,and ileal digesta were collected to determine the effects of increasing Xg levels and Xg intake on intestinal *** Increasing Xg intake tended to quadratically decrease(P=0.059)viscosity of jejunal digesta(min:1.74 m Pa·s at 751/335(TXU/TgU)/kg).Increasing levels of Xg quadratically decreased(Pmin:0.6%at 630/281(TXU/TgU)/kg)in the jejunal *** Xg intake quadratically increased(Pmax:40.3%at 608/271(TXU/TgU)/kg)in the jejunal *** Xg intake quadratically decreased(Pmin:1.6%at 560/250(TXU/TgU)/kg)in the jejunal *** levels of Xg tended to linearly decrease(P=0.073)jejunal Ig g and tended to quadratically increase(P=0.085)jejunal villus height to crypt depth ratio(max:2.62 at 560/250(TXU/TgU)/kg).Increasing Xg intake tended to linearly increase the apparent ileal digestibility of dry matter(P=0.087)and ether extract(P=0.065).Increasing Xg intake linearly increased(Pge daily *** A combinational use of xylanase andβ-glucanase would hydrolyze the non-starch polysaccharides fractions,positively modulating the jejunal mucosa-associated *** intake of

关键词： glucanase growth performance Intestinal health Nursery pigs Xylanase

ATP-binding cassette transporters as possible targets for the intervention of neurodegenerative diseases

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Neural Regeneration Research 2024年第4期19卷 721-722页

作者： Hiu Chuen Lok glenda m.Halliday Woojin Scott kim Brain and mind Centre&School of medical Sciences The University of SydneySydneyNSWAustralia

ATP-binding cassette(ABC)transporters are ubiquitous membrane-bound proteins that are responsible for the translocation of a broad spectrum of substrates across cellular membranes,including lipids,amino acids,nucleosides,sugars,and ***,ABC transporters are highly expressed in the *** their functions in the brain still need to be elucidated,several members are implicated in the pathogenesis of neurodegenerative diseases,including Alzheimer’s disease(AD),Parkinson’s disease(PD),and frontotemporal *** this perspective,we will review current knowledge of ABC transporters in the central nervous system in terms of physiological functions and pathology in ***,we will explore the possibilities of ABC transporters as potential targets in the development of therapeutics for neurodegenerative diseases.

关键词： sugar degenerative diseases

症状性子宫肌瘤病人非球形聚乙烯醇颗粒与三丙烯酸明胶微球子宫动脉栓塞术后疼痛比较的随机对照试验研究

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国际医学放射学杂志 2021年第2期44卷 238-238页

作者： K.Han S.Y.kim H.J.kim J.H.Kwon g.m.kim J.Lee 朱海涛

摘要非球形聚乙烯醇(PVA)颗粒和三丙烯酸明胶微球(TAgm)在子宫动脉栓塞(UAE)中应用的相关比较研究较少。目的比较PVA与TAgm治疗症状性子宫肌瘤病人的

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Postmortem ^(7)Li NmR analysis for assessing the reversibility of lithium metal electrodes in lithium metal batteries

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Journal of Energy Chemistry 2024年第7期94卷 430-440页

作者： Jaewon Baek Sunha kim Hee-Tak kim Oc Hee Han Department of Chemical&Biomolecular Engineering KAISTDaejeon 34141Republic of Korea metropolitan Seoul Center Korea Basic Science InstituteSeoul 03759Republic of Korea graduate School of Analytical Science&Technology Chungnam National UniversityDaejeon 34134Republic of Korea

Despite the proficiency of lithium(Li)-7 NmR spectroscopy in delineating the physical and chemical states of Li metal electrodes,challenges in specimen preparation and interpretation impede its *** this study,we conducted a comprehensive postmortem analysis utilizing ^(7)Li NmR,employing a stan-dard magic angle spinning probe to examine protective-layer coated Li metal electrodes and LiAg alloy electrodes against bare Li metal electrodes within Li metal batteries(LmBs).Our investigation explores the effects of sample burrs,alignment with the magnetic field,the existence of liquid electrolytes,and precycling on the ^(7)Li NmR *** contrasting NmR spectra before and after cycling,we identi-fied alterations in Li^(0) and Li^(+) signals attributable to the degradation of the Li metal *** NmR analyses decisively demonstrate the efficacy of the protective layer in mitigating dendrite and solid elec-trolyte interphase ***,we noted that Li*ions near the Li metal surface exhibit magnetic susceptibility anisotropy,revealing a novel approach to studying diamagnetic species on Li metal elec-trodes in *** study provides valuable insights and practical guidelines for characterizing distinct lithium states within LmBs.

关键词： NmR spectroscopy Lithium-7 Lithium metal battery Electrolyte Electrode-protective layer Solid electrolyte interface magnetic susceptibility anisotropy Lithium-metal NmR signal Diamagnetic^(7)Li NmR signal

Two intestinal microbiota-derived metabolites, deoxycholic acid and butyrate, synergize to enhance host defense peptide synthesis and alleviate necrotic enteritis

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Journal of Animal Science and Biotechnology 2024年第3期15卷 1158-1172页

作者： Dohyung.m.kim Jing Liu melanie A.Whitmore Isabel Tobin Zijun Zhao guolong Zhang Department of Animal and Food Sciences Oklahoma State UniversityStillwaterOKUSA

Background Necrotic enteritis(NE)is a major enteric disease in poultry,yet effective mitigation strategies remain *** acid(DCA)and butyrate,two major metabolites derived from the intestinal microbiota,have independently been shown to induce host defense peptide(HDP)***,the potential synergy between these two compounds remains *** To investigate the possible synergistic effect between DCA and butyrate in regulating HDP synthesis and barrier function,we treated chicken HD11 macrophage cells and jejunal explants with DCA and sodium butyrate(NaB),either individually or in combination,for 24 ***,we performed RNA isolation and reverse transcrip-tion-quantitative PCR to analyze HDP genes as well as the major genes associated with barrier *** further determine the synergy between DCA and NaB in enhancing NE resistance,we conducted two independent trials with Cobb broiler *** each trial,the diet was supplemented with DCA or NaB on the day-of-hatch,followed by NE induction through sequential challenges with Eimeria maxima and Clostridium perfringens on d 10 and 14,*** recorded animal mortality after infection and assessed intestinal lesions on d *** impact of DCA and NaB on the microbiota in the ileum and cecum was evaluated through bacterial 16S rRNA gene *** We found that the combination of DCA and NaB synergistically induced multiple HDP genes in both chicken HD11 cells and jejunal ***,the gene for claudin-1,a major tight junction protein,also exhibited synergistic induction in response to DCA and ***,dietary supplementation with a combination of 0.75 g/kg DCA and 1 g/kg NaB led to a significant improvement in animal survival and a reduction in intestinal lesions compared to either compound alone in a chicken model of ***,the cecal microbiota of NE-infected chickens showed a marked decrease in SCFA-producing bacteria such as Bacteroides,F

关键词： Bile acids Host defense peptides metabolites microbiome Necrotic enteritis Short-chain fatty acids

Strengthening mechanisms analysis and tailoring of bimodal grain structures for enhanced strength in CoCrFemnNi high-entropy alloys

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Rare metals 2024年第8期43卷 3893-3903页

作者： Jaesoung Lee Seulgi kim Taehyun Kwon Young II kim Suyeon kim Sung Ho Song Bin Lee Dongju Lee Department of Urban Energyand Environmental EngineeringChungbuk National UniversityCheongju 28644Republic of Korea Division of Advanced materials Engineering Kongju National UniversityChungnam 330-717Republic of Korea Department of Advanced materials Engineering for Information and Electronics Integrated-Education Institute for Frontier Science and Technology(BK21 Four)Kyung Hee UniversityYongin17104Republic of Korea

The CoCrFemnNi high-entropy alloys(HEAs)with a(face-centered cubic) FCC structure has garnered considerable attention for its exceptional ductility and strain hardening ***,its yield strength is insufficient for structural *** this study,strengthening mechanisms in these HEAs were investigated to gain insight into the mechanical properties according to alloy powder ***,we present a novel approach to achieve both high strength and high ductility through the creation of a bimodal structure consisting of both coarse and fine grains via gas atomization and spark plasma sintering processes.A bimodally structured HEA prepared with a mass ratio of 2:8 between coarse particles(75-106 μm) and fine particles(≤25 μm)yielded optimal results,with a strength of 491.95 mPa and elongation of 19.64%.This strength value represents an~41% increase compared with the sample that displayed a fine single microstructure(347.08 mPa for yield strength).The strength enhancement was attributed to the prevention of plastic deformation initiation from the fine particles during *** innovative approach to the creation of HEAs with bimodal structures shows promise for various applications,such as structural components that require a combination of high strength and high ductility.

关键词： High-entropy alloys CrCoFemoNi Bimodal gas atomization mechanical properties

Surface-modified Ag@Ru-P25 for photocatalytic CO_(2) conversion with high selectivity over CH_(4) formation at the solid–gas interface

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Carbon Energy 2024年第1期6卷 182-196页

作者： Chaitanya B.Hiragond Sohag Biswas Niket SPowar Junho Lee Eunhee gong Hwapyong kim Hong Soo kim Jin-Woo Jung Chang-Hee Cho Bryan m.Wong Su-Il In Department of Energy Science&Engineering Daegu Gyeongbuk Institute of Science and Technology(DGIST)DaeguRepublic of Korea Department of Chemical&Environmental Engineering Materials Science&Engineering ProgramDepartment of ChemistryDepartment of Physics&AstronomyUniversity of California-RiversideRiversideCaliforniaUSA Department of Physics and Chemistry Daegu Gyeongbuk Institute of Science and Technology(DGIST)DaeguRepublic of Korea NiceScience Corporation DaeguRepublic of Korea

Systematic optimization of the photocatalyst and investigation of the role of each component is important to maximizing catalytic activity and comprehending the photocatalytic conversion of CO_(2) reduction to solar fuels.A surface-modified Ag@Ru-P25 photocatalyst with H_(2)O_(2) treatment was designed in this study to convert CO_(2) and H_(2)O vapor into highly selective *** doping followed by Ag nanoparticles(NPs)cocatalyst deposition on P25(TiO_(2))enhances visible light absorption and charge separation,whereas H_(2)O_(2) treatment modifies the surface of the photocatalyst with hydroxyl(–OH)groups and promotes CO_(2) ***-resonance transmission electron microscopy,X-ray photoelectron spectroscopy,X-ray absorption near-edge structure,and extended X-ray absorption fine structure techniques were used to analyze the surface and chemical composition of the photocatalyst,while thermogravimetric analysis,CO_(2) adsorption isotherm,and temperature programmed desorption study were performed to examine the significance of H_(2)O_(2) treatment in increasing CO_(2) reduction *** optimized Ag1.0@Ru1.0-P25 photocatalyst performed excellent CO_(2) reduction activity into CO,CH4,and C2H6 with a~95%selectivity of CH4,where the activity was~135 times higher than that of pristine TiO_(2)(P25).For the first time,this work explored the effect of H_(2)O_(2) treatment on the photocatalyst that dramatically increases CO_(2) reduction activity.

关键词： gas-phase CO_(2) reduction H_(2)O_(2) treatment plasmonic nanoparticles solar fuel photocatalyst surface modification