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Customizable design ofmultiple-biomolecule delivery platform for enhanced osteogenic responses via‘tailored assembly system’

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Bio-Design and Manufacturing 2022年第3期5卷 451-464页

作者： Hyun Lee Min-Kyu Lee Ginam Han Hyoun-Ee Kim Juha Song Yuhyeon Na Chang-Bun Yoon SeKwon Oh tae-sik jang Hyun-Do Jung Department of Biomedical-Chemical Engineering Catholic University of KoreaBucheon 14662Republic of Korea Department of Biotechnology The Catholic University of KoreaBucheon 14662Republic of Korea Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea Querrey Simpson Institute for Bioelectronics Northwestern UniversityEvanstonIL 60208USA Biomedical Implant Convergence Research Center Advanced Institutes of Convergence TechnologySuwon 443-270Republic of Korea School of Chemical and Biomedical Engineering Nanyang Technological University70 Nanyang DriveSingapore 637457Singapore Department of Advanced Materials Engineering Korea Polytechnic UniversitySiheung-siGyeonggi-do 15073Republic of Korea Surface R&D Group Korea Institute of Industrial TechnologyIncheon 21999Republic of Korea Department of Materials Science and Engineering Chosun UniversityGwangju 61452Republic of Korea

Porous titanium(Ti)scaffolds have been extensively utilized as bone substitute scaffolds due to their superior biocompatibility and excellent mechanical ***,naturally formed TiO2 on the surface limits fast *** biomolecules have been widely utilized to overcome this issue;however,homogeneous porous Ti scaffolds could not simultaneously deliver multiple biomolecules that have different release *** this study,functionally graded porous Ti scaffolds(FGPTs)with dense inner and porous outer parts were fabricated using a two-body combination and densification *** with growth factor(BMP-2)and antibiotics(TCH)exhibited suitable mechanical properties as bone substituting material and presented good structural *** release of BMP-2 was considerably prolonged,whereas the release of TCH was comparable to that of homogenous porous titanium scaffolds(control group).The osteogenic differentiation obtained using FGPTs was maintained due to the prolonged release of *** antimicrobial properties of these scaffolds were verified using *** in terms of prior release *** addition,various candidates for graded porous Ti scaffolds with altered pore characteristics were presented.

关键词： Functionally graded porous titanium scaffold Tailored assembly system Mechanical tunability Multiplebiomolecule delivery Bone tissue engineering

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A combination strategy of functionalized polymer coating with Ta ion implantation for multifunctional and biodegradable vascular stents

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Journal of Magnesium and Alloys 2021年第6期9卷 2195-2207页

作者： Kwang-Hee Cheon Cheonil Park Min-Ho Kang Suhyung Park Jinyoung Kim Seol-Ha Jeong Hyoun-Ee Kim Hyun-Do Jung tae-sik jang Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea Department of Chemical and Biological Engineering Seoul National UniversitySeoul 08826Republic of Korea Department of Biomedical-Chemical Engineering Catholic University of KoreaBucheon-si 03083Republic of Korea Department of Biotechnology The Catholic University of KoreaBucheon-si 14662Republic of Korea Department of Materials Science and Engineering Chosun UniversityGwangju 61452Republic of Korea

Biodegradable stents made of magnesium(Mg)and its alloys have been developed to minimize persistent inflammation or in-stent restenosis,which are the main problems for permanent ***,their rapid corrosion behavior under physiological conditions leads to poor vascular compatibility and premature structural failure,which remains an important unsolved clinical ***,we demonstrate a new strategy for solving this problem by combining poly(ether imide)(PEI)coating and subsequent tantalum(Ta)ion *** PEI coating covers the whole surface of the Mg stent uniformly via a spray coating technique and provides Mg with superior corrosion resistance and stable sirolimus-carrying *** ion implantation is conducted by a sputtering-based plasma immersion ion implantation technique only onto the luminal surface of the PEI-coated Mg *** extremely short processing time(<30 s)permits preservation of the PEI coating’s corrosion protection ability and sirolimus loading *** addition,a Ta-implanted skin layer that forms on the topmost surface of the PEI coating plays an effective role in not only preventing a rapid release of sirolimus from the surface but also improving the PEI coating’s surface *** on in vitro cellular response and blood compatibility tests,Ta ion implantation leads to the improvement of endothelial cell adhesion/proliferation and suppression of platelet adhesion/activation regardless of sirolimus *** results indicate that the combination of PEI coating and Ta ion implantation has significant innovative potential to provide excellent vascular compatibility and prevent in-stent restenosis and thrombosis.

关键词： Magnesium stent Biodegradability Tantalum Plasma immersion ion implantation Multifunctionality

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Accelerated biodegradation of iron-based implants via tantalum-implanted surface nanostructures

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Bioactive Materials 2022年第3期7卷 239-250页

作者： Min-Kyu Lee Hyun Lee Cheonil Park In-Gu Kang Jinyoung Kim Hyoun-Ee Kim Hyun-Do Jung tae-sik jang Department of Materials Science and Engineering Seoul National UniversitySeoul08826Republic of Korea Querrey Simpson Institute for Bioelectronics Northwestern UniversityEvanstonIL60208USA Department of Biomedical-Chemical Engineering Catholic University of KoreaBucheon14662Republic of Korea Department of Biotechnology The Catholic University of KoreaBucheon14662Republic of Korea Department of Materials Science and Engineering Chosun UniversityGwangju61452Republic of Korea

In recent years,pure iron(Fe)has attracted significant attention as a promising biodegradable orthopedic implant material due to its excellent mechanical and biological ***,in physiological conditions,Fe has an extremely slow degradation rate with localized and irregular degradation,which is problematic for practical *** this study,we developed a novel combination of a nanostructured surface topography and galvanic reaction to achieve uniform and accelerated degradation of an Fe *** target-ion induced plasma sputtering(TIPS)technique was applied on the Fe implant to introduce biologically compatible and electrochemically noble tantalum(Ta)onto its surface and develop surface nano-galvanic *** tests revealed that the uniformly distributed nano-galvanic corrosion cells of the TIPS-treated sample(nano Ta-Fe)led to relatively uniform and accelerated surface degradation compared to that of bare ***,the mechanical properties of nano Ta-Fe remained almost constant during a long-term in vitro immersion test(~40 weeks).Biocompatibility was also assessed on surfaces of bare Fe and nano Ta-Fe using in vitro osteoblast responses through direct and indirect contact assays and an in vivo rabbit femur medullary cavity implantation *** results revealed that nano Ta-Fe not only enhanced cell adhesion and spreading on its surface,but also exhibited no signs of cellular or tissue *** results demonstrate the immense potential of Ta-implanted surface nanostructures as an effective solution for the practical application of Fe-based orthopedic implants,ensuring long-term biosafety and clinical efficacy.

关键词： Iron Tantalum Ion implantation Biodegradation Orthopedic implants

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Construction of tantalum/poly(ether imide)coatings on magnesium implants with both corrosion protection and osseointegration properties

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Bioactive Materials 2021年第4期6卷 1189-1200页

作者： Kwang-Hee Cheon Cheonil Park Min-Ho Kang In-Gu Kang Min-Kyu Lee Hyun Lee Hyoun-Ee Kim Hyun-Do Jung tae-sik jang Department of Materials Science and Engineering Seoul National UniversitySeoulRepublic of Korea Department of Biomedical-Chemical Engineering Catholic University of KoreaBucheonGyeonggi-doRepublic of Korea Institute of Health Science Research Korea UniversitySeoul02841Republic of Korea Department of Materials Science and Engineering Chosun UniversityGwangjuRepublic of Korea

Poly(ether imide)(PEI)has shown satisfactory corrosion protection capability with good adhesion strength as a coating for magnesium(Mg),a potential candidate of biodegradable orthopedic implant ***,its innate hydrophobic property causes insufficient osteoblast affinity and a lack of ***,we modify the physical and chemical properties of a PEI-coated Mg implant.A plasma immersion ion implantation technique is combined with direct current(DC)magnetron sputtering to introduce biologically compatible tantalum(Ta)onto the surface of the PEI *** PEI-coating layer is not damaged during this process owing to the extremely short processing time(30 s),retaining its high corrosion protection property and adhesion *** Ta-implanted layer(roughly 10-nm-thick)on the topmost PEI surface generates long-term surface hydrophilicity and favorable surface conditions for pre-osteoblasts to adhere,proliferate,and ***,in a rabbit femur study,the Ta/PEI-coated Mg implant demonstrates significantly enhanced bone tissue affinity and osseointegration *** results indicate that Ta/PEI-coated Mg is promising for achieving early mechanical fixation and long-term success in biodegradable orthopedic implant applications.

关键词： Magnesium Tantalum Poly(ether imide) Bio-functionalized coating Biodegradable orthopedic implants

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Functionally graded structure of a nitride-strengthened Mg_(2)Si-based hybrid composite

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Journal of Magnesium and Alloys 2024年第3期12卷 1239-1256页

作者： Jeongho Yang Woongbeom Heogh Hogi Ju Sukhyun Kang tae-sik jang Hyun-Do Jung Mohammad Jahazi Seung Chul Han Seong Je Park Hyoung Seop Kim Susmita Bose Amit Bandyopadhyay Martin Byung-Guk Jun Young Won Kim Dae-kyeom Kim Rigoberto CAdvincula Clodualdo Aranas Jr Sang Hoon Kim School of Mechanical Engineering Pusan National UniversityBusan 46241Republic of Korea Department of Mechanical Design Engineering Hanyang UniversitySeoul 04763Republic of Korea Process Research 3 Team LG Display Co.Ltd.PajuGyeonggi-do 10845Republic of Korea Department of Materials Science and Engineering Chosun UniversityGwangju 61452Republic of Korea Institute of Well-Aging Medicare&Chosun University LAMP Center Chosun UniversityGwangju 61452Republic of Korea Division of Materials Science and Engineering Hanyang UniversitySeoul 04763Republic of Korea Department of Mechanical Engineering École de Technologie SupérieureMontrealQuebec H3C 1K3Canada Material&Component Convergence R&D Center Korea Construction Equipment Technology InstituteGunsanJeollabuk-do 54002Republic of Korea School of Mechanical and Aerospace Engineering Nanyang Technological UniversitySingapore 639798Singapore Graduate Institute of Ferrous&Eco Materials Technology Pohang University of Science and TechnologyPohangGyeongsangbuk-do 37673Republic of Korea Advanced Institute for Materials Research Tohoku UniversitySendai 980-8577Japan Institute for Convergence Research and Education in Advanced Technology Yonsei UniversitySeoul 03722Republic of Korea School of Mechanical and Materials Engineering Washington State UniversityPullmanWashington 99164USA School of Mechanical Engineering Purdue UniversityWest LafayetteIndiana 47907USA Research Institute of Advanced Manufacturing Technology Korea Institute of Industrial TechnologyIncheon 21999Republic of Korea Department of Macromolecular Science and Engineering Case Western Reserve UniversityClevelandOhio 44106USA Department of Chemical and Biomolecular Engineering and Joint Institute for Advanced Materials University of TennesseeKnoxvilleTennessee 37996USA Center for Nanophase Materials and Sciences Oak Ridge National LaboratoryOak RidgeTennessee 37830USA Department of Mechanical Engineering University of New BrunswickFrederictonNew Brunswick E3B 5A3Cana

The ex-situ incorporation of the secondary SiC reinforcement,along with the in-situ incorporation of the tertiary and quaternary Mg_(3)N_(2) and Si_(3)N_(4) phases,in the primary matrix of Mg_(2)Si is employed in order to provide ultimate wear resistance based on the laser-irradiation-induced inclusion of N_(2) gas during laser powder bed *** is substantialized based on both the thermal diffusion-and chemical reactionbased metallurgy of the Mg_(2)Si–SiC/nitride hybrid *** study also proposes a functional platform for systematically modulating a functionally graded structure and modeling build-direction-dependent architectonics during additive *** strategy enables the development of a compositional gradient from the center to the edge of each melt pool of the Mg_(2)Si–SiC/nitride hybrid ***,the coefficient of friction of the hybrid composite exhibits a 309.3%decrease to–1.67 compared to–0.54 for the conventional nonreinforced Mg_(2)Si structure,while the tensile strength exhibits a 171.3%increase to 831.5 MPa compared to 485.3 MPa for the conventional *** outstanding mechanical behavior is due to the(1)the complementary and synergistic reinforcement effects of the SiC and nitride compounds,each of which possesses an intrinsically high hardness,and(2)the strong adhesion of these compounds to the Mg_(2)Si matrix despite their small sizes and low concentrations.

关键词： Laser powder bed fusion Mg_(2)Si-SiC/nitride hybrid composite Both the thermal diffusion-and chemical reaction-based metallurgy Functionally graded structure Compositional gradient Wear resistance.

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3D-printed versatile biliary stents with nanoengineered surface for anti-hyperplasia and antibiofilm formation

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Bioactive Materials 2024年第7期37卷 172-190页

作者： Hyun Lee Dong-Sung Won Sinwoo Park Yubeen Park Ji Won Kim Ginam Han Yuhyun Na Min-Ho Kang Seok Beom Kim Heemin Kang Jun-Kyu Park tae-sik jang Sang Jin Lee Su APark Sang Soo Lee Jung-Hoon Park Hyun-Do Jung Department of Biomedical-Chemical Engineering The Catholic University of KoreaBucheon14662Gyeonggi-doRepublic of Korea Department of Biotechnology The Catholic University of KoreaBucheon14662Republic of Korea Biomedical Engineering Research Center Asan Institute for Life SciencesAsan Medical Center88 Olympic-ro 43-gilSongpa-guSeoul05505Republic of Korea Department of Gastroenterology Asan Medical CenterUniversity of Ulsan College of Medicine88 Olympic-ro 43-gilSongpa-guSeoul05505Republic of Korea Research Center Metamorp IncSeoul08584Republic of Korea Department of Materials Science and Engineering Korea UniversitySeoul02841Republic of Korea IMT Inc Gwangju61086Republic of Korea School of Biomedical Convergence Engineering Pusan National UniversityYangsan50612Republic of Korea Biofunctional Materials Division of Applied Oral Sciences and Community Dental CareFaculty of DentistryThe University of Hong Kong34 Hospital RoadSai Ying PunHong Kong SARPR China Nano-Convergence Manufacturing Systems Research Division Korea Institute of Machinery and Materials(KIMM)Daejeon34103Republic of Korea Department of Convergence Medicine Asan Medical CenterUniversity of Ulsan College of Medicine88Olympic-ro 43-GilSongpa-guSeoul05505Republic of Korea Division of Materials Science and Engineering Hanyang UniversitySeoul04763Republic of Korea

Biliary strictures are characterized by the narrowing of the bile duct lumen,usually caused by surgical biliary injury,cancer,inflammation,and scarring from *** stent placement is a well-established method for the management of biliary ***,maintaining optimal mechanical properties of stents and designing surfaces that can prevent stent-induced tissue hyperplasia and biofilm formation are challenges in the fabrication of biodegradable biliary stents(BBSs)for customized *** study proposes a novel approach to fabricating functionalized polymer BBSs with nanoengineered surfaces using 3D *** 3D printed stents,fabricated from bioactive silica poly(ε-carprolactone)(PCL)via a sol-gel method,exhibited tunable mechanical properties suitable for supporting the bile duct while ensuring ***,a nanoengineered surface layer was successfully created on a sirolimus(SRL)-coated functionalized PCL(fPCL)stent using Zn ion sputtering-based plasma immersion ion implantation(S-PIII)treatment to enhance the performance of the *** nanoengineered surface of the SRL-coated fPCL stent effectively reduced bacterial responses and remarkably inhibited fibroblast proliferation and initial burst release of SRL in vitro *** physicochemical properties and biological behaviors,including in vitro biocompatibility and in vivo therapeutic efficacy in the rabbit bile duct,of the Zn-SRL@fPCL stent demonstrated its potential as a versatile platform for clinical applications in bile duct tissue engineering.

关键词： 3D printing Biodegradable biliary stent Functionalized polymer Zinc ion implantation Antibiofilm formation Anti-hyperplasia

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Gradient Si-and Ti-doped Fe_(2)O_(3) hierarchical homojunction photoanode for efficient solar water splitting:Effect of facile microwave-assisted growth of Si-FeOOH on Ti-FeOOH nanocorals

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Journal of Energy Chemistry 2023年第2期77卷 27-37,I0002页

作者： tae sik Koh Periyasamy Anushkkaran Weon-sik Chae Hyun Hwi Lee Sun Hee Choi Jum Suk jang Division of Biotechnology College of Environmental and Bioresource SciencesJeonbuk National UniversityIksan 54596Republic of Korea Daegu Center Korea Basic Science InstituteDaegu 41566Republic of Korea Pohang Accelerator Laboratory Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea

The construction of a homojunction is an effective approach for addressing issues such as slow charge separation and charge-transfer kinetics in *** the present work,we designed a gradient Si-and Ti-doped Fe_(2)O_(3) homojunction photoanode to improve the photoelectrochemical(PEC)performance of a Ti-doped Fe_(2)O_(3) ***-FeOOH nanocorals were synthesized using a hydrothermal process,and Si-FeOOH was grown on Ti-FeOOH nanocorals using a rapid and facile microwaveassisted(MW)*** varying the MW irradiation time,the thickness of the Si/Ti:Fe_(2)O_(3) photoanode was adjusted and an optimized 3-Si/Ti:Fe_(2)O_(3) photoelectrode was achieved with a significantly enhanced photocurrent density(1.37 mA cm^(-2) at 1.23 V ***)and a cathodic shift of the onset potential(150 mV)compared with that of bare Ti-Fe_(2)O_(3).This enhanced PEC performance can be ascribed to homojunction formation and Si gradient *** Si dopant increased the donor concentration and the formation of a homojunction improved the intrinsic built-in electric field,thereby promoting charge separation and charge ***,the as-formed homojunction passivated the surfacetrapping states,consequently improving the charge transfer efficiency(60%at 1.23 VRHE)at the photoanode/electrolyte *** findings could pave the way for the microwave-assisted fabrication of diverse efficient homojunction photoanodes for PEC water splitting applications.

关键词： Homojunction Microwave-assisted Hematite Gradient doping PEC water splitting

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Saccharomyces boulardii as a single trigger of food protein-induced enterocolitis syndrome: Seven case reports

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World Journal of Clinical Cases 2025年第6期13卷 35-40页

作者： Jin-Bok Hwang Hyo-Jeong jang Department of Pediatrics Keimyung University School of MedicineDongsan Medical CenterDaegu 42601South Korea

BACKGROUND Food protein-induced enterocolitis syndrome(FPIES)is the most serious type of non-immunoglobulin E(IgE)-mediated food allergic reaction manifesting as sepsis-like symptom,which can lead to *** boulardii(***),a probiotic prescribed frequently in clinical settings,has been reported to trigger FPIES in an infant with soy-triggered *** this report,we describe a new clinical FPIES in which *** was the sole triggering factor of acute FPIES adverse reaction in seven healthy *** SUMMARY Seven FPIES cases triggered by only *** were gathered from 2011 to the *** of the patients had previously experienced any allergic reaction to cow’s milk,soy,or complementary *** age of the patients was 4-10-months old,and the symptoms of FPIES developed after ingestion of ***,which is mostly prescribed for the treatment of gastroenteritis or antibiotic-associated *** patients experienced severe repetitive vomiting 1-3 hours after *** *** lethargy,marked pallor,and cyanosis were also *** IgE-mediated hypersensitivity developed in any *** was followed by initial intense vomiting in approximately 5-10 hours after *** ingestion,and only one case showed bloody,purulent,and foul-smelling *** patients stabilized quickly,mostly within 6 *** got all improved within 24 hours after discontinuation of *** *** can be the sole trigger of acute FPIES and be prescribed cautiously even in healthy children without FPIES.

关键词： Food protein-induced enterocolitis syndrome Food hypersensitivity Saccharomyces boulardii Probiotics Child Case report

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Regulation of sleep by astrocytes in the hypothalamic ventrolateral preoptic nucleus

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Neural Regeneration Research 2025年第4期20卷 1098-1100页

作者： Jae-Hong Kim Ruqayya Afridi Il-Sung jang Maan Gee Lee Kyoungho Suk Brain Korea 21 four KNU Convergence Educational Program of Biomedical Sciences for Creative Future Talents School of MedicineKyungpook National UniversityDaeguRepublic of Korea Department of Pharmacology School of MedicineKyungpook National UniversityDaeguRepublic of Korea Department of Pharmacology School of DentistryKyungpook National UniversityDaeguRepublic of Korea Brain Science&Engineering Institute Kyungpook National UniversityDaeguRepublic of Korea

Astrocytes are functionally dynamic cells that support neurons in multiple ways throughout an organism’s *** astrocytic regulation of neuronal activity has been increasingly recognized in recent *** are now recognized as playing a more complex role than mere bystanders in the central nervous ***,their role in regulating the sleep neurocircuitry is not well *** this perspective,we highlight the role of astrocytes in sleep modulation,with a particular focus on regulatory mechanisms related to the ventrolateral preoptic nucleus(VLPO)of the *** briefly discuss recent literature reporting the role of VLPO astrocytes in regulating sleep-associated behaviors.

关键词： sleep ventrolateral astrocytes

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Comparative pollen morphology of Glechoma and Marmoritis(Nepetinae,Lamiaceae)

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Journal of Systematics and Evolution 2010年第6期48卷 464-473页

作者： tae-Soo jang Suk-Pyo HONG Laboratory of Plant Systematics Department of BiologyInstitute of Basic SciencesKyung Hee University

The pollen morphology of 13 taxa(34 specimens) of the genera Glechoma L.,and Marmoritis *** investigated in detail using light,scanning electron,and transmission electron *** grains of all studied taxa are small to large in size(P = 32.5-60.4 μm,E = 20.2-50.5 μm),prolate-spheroidal to prolate in shape and mostly hexacolpate(the amb more or less circular or rarely ellipsoid) with granular *** sexine ornamentation of Glechoma is bireticulate;the muri of the primary reticulum are irregularly circled,and lumen size is *** contrast,the sexine surfaces of the Marmoritis pollen tend to more elongate or wider at the muri of the primary reticulum than those of the *** pollen wall stratification of selected taxa(three from Glechoma and one from Marmoritis) is characterized by unbranched columellae,and continuous or distinctly discontinuous endexine based on transmission electron microscopy *** results of Glechoma and Marmoritis reveal rather similar pollen morphological features,however,fine details of sexine ornamentation are characteristic to differentiate the pollen *** these differences may be useful in establishing the taxonomic boundary between two genera,they are too weak to segregate diagnostic characters.

关键词： Glechoma Lamiaceae Marmoritis Nepetinae pollen morphology scanning electron microscope sexine ornamentation transmission electron microscope.

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