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3D-printed gelatin methacrylate (GelMA)/ silanated silica scaffold assisted by two-stage cooling system for hard tissue regeneration

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Regenerative Biomaterials 2021年第2期8卷 50-63页

作者： Eunjeong Choi Dongyun kim Donggu Kang Gi Hoon Yang Bongsu jung MyungGu Yeo Min-Jeong Park SangHyun An KyoungHo Lee jun sik kim Jong Chul kim Woonhyeok Jeong Hye Hyun Yoo Hojun Jeon Research Institute of Additive Manufacturing and Regenerative Medicine Baobab Healthcare Inc55 Hanyangdaehak-RoAnsanGyeonggi-do 15588South Korea Department of Mechanical Engineering Korea Polytechnic UniversitySangidaehak-roSiheungGyeonggi-do 15073South Korea Medical Device Development Center Daegu-Gyeongbuk Medical Innovation Foundation(DGMIF)80Cheombok-roDong-guDaegu 41061South Korea Laboratory Animal Center Daegu-Gyeongbuk Medical Innovation Foundation(DGMIF)80 Cheombok-roDong-guDaegu 41061South Korea Department of Plastic and Reconstructive Surgery Dongsan Medical CenterKeimyung University College of Medicine1035 Dalgubeol-daeroDalseo-guDaegu 42601South Korea Institute of Pharmaceutical Science and Technology College of PharmacyHanyang University55 Hanyangdaehak-RoAnsanGyeonggi-Do 15588South Korea

Among many biomaterials,gelatin methacrylate(GelMA),a photocurable protein,has been widely used in 3D bioprinting process owing to its excellent cellular responses,biocompatibility and ***,GelMA still shows a low processability due to the severe temperature dependence of *** overcome this obstacle,we propose a two-stage temperature control system to effectively control the viscosity of *** optimize the process conditions,we evaluated the temperature of the cooling system(jacket and stage).Using the established system,three GelMA scaffolds were fabricated in which different concentrations(0,3 and 10 wt%)of silanated silica particles were *** evaluate the performances of the prepared scaffolds suitable for hard tissue regeneration,we analyzed the physical(viscoelasticity,surface roughness,compressive modulus and wettability)and biological(human mesenchymal stem cells growth,western blotting and osteogenic differentiation)***,the composite scaffold with greater silica contents(10 wt%)showed enhanced physical and biological performances including mechanical strength,cell initial attachment,cell proliferation and osteogenic differentiation compared with those of the *** results indicate that the GelMA/silanated silica composite scaffold can be potentially used for hard tissue regeneration.

关键词： 3D bioprinting gelatin methacrylate silanated silica cooling system human mesenchymal stem cells

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Enhancing micro-scale SiOx anode durability:Electro-mechanical strengthening of binder networks via anchoring carbon nanotubes with carboxymethyl cellulose

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Journal of Energy Chemistry 2025年第2期101卷 23-33页

作者： Chaeyeon Ha Jin Kyo Koo jun Myoung Sheem Young-jun kim SKKU Advanced Institute of Nano Technology (SAINT) Sungkyunkwan University Department of Nano Science and Technology Sungkyunkwan University Advanced Center for Convergence Energy Storage System Sungkyunkwan University SKKU Institute of Energy Science and Technology (SIEST) Sungkyunkwan University

With the increasing prevalence of lithium-ion batteries（LIBs） applications,the demand for high-capacity next-generation materials has also *** currently considered a promising anode material due to its exceptionally high capacity for ***,the significant volumetric changes of SiOxduring cycling and its initial Coulombic efficiency（ICE） complicate its use,whether alone or in combination with graphite *** this study,a three-dimensional conductive binder network with high electronic conductivity and robust elasticity for graphite/SiOxblended anodes was proposed by chemically anchoring carbon nanotubes and carboxymethyl cellulose binders using tannic acid as a chemical *** addition,a dehydrogenation-based prelithiation strategy employing lithium hydride was utilized to enhance the ICE of *** combination of these two strategies increased the CE of SiOxfrom 74% to87% and effectively mitigated its volume expansion in the graphite/SiOxblended electrode,resulting in an efficient electron-conductive binder *** led to a remarkable capacity retention of 94% after30 cycles,even under challenging conditions,with a high capacity of 550 mA h g-1and a current density of 4 mA ***,to validate the feasibility of utilizing prelithiated SiOxanode materials and the conductive binder network in LIBs,a full cell incorporating these materials and a single-crystalline Ni-rich cathode was *** cell demonstrated a～27.3% increase in discharge capacity of the first cycle(～185.7 mA h g-1) and exhibited a cycling stability of 300 ***,this study reports a simple,feasible,and insightful method for designing high-performance LIB electrodes.

关键词： Lithium-ion batteries SiO x anode Blended anode Carbon nanotubes Carboxymethyl cellulose Conductive binder network

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High mobility group box 1 in the central nervous system:regeneration hidden beneath inflammation

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Neural Regeneration Research 2025年第1期20卷 107-115页

作者： Hanki kim Bum jun kim Seungyon Koh Hyo Jin Cho Xuelian Jin Byung Gon kim jun Young Choi Department of Brain Science Ajou University School of MedicineSuwonSouth Korea Department of Biomedical Sciences Ajou University Graduate School of MedicineSuwonSouth Korea Department of Neurology Ajou University School of MedicineSuwonSouth Korea Department of Geriatrics The Affiliated Suqian First People’s Hospital of Nanjing Medical UniversitySuqianJiangsu ProvinceChina

High-mobility group box 1 was first discovered in the calf thymus as a DNA-binding nuclear protein and has been widely studied in diverse fields,including neurology and ***-mobility group box 1 in the extracellular space functions as a pro-inflammatory damage-associated molecular pattern,which has been proven to play an important role in a wide variety of central nervous system disorders such as ischemic stroke,Alzheimer’s disease,frontotemporal dementia,Parkinson’s disease,multiple sclerosis,epilepsy,and traumatic brain *** drugs that inhibit high-mobility group box 1 as a damage-associated molecular pattern,such as glycyrrhizin,ethyl pyruvate,and neutralizing anti-high-mobility group box 1 antibodies,are commonly used to target high-mobility group box 1 activity in central nervous system *** it is commonly known for its detrimental inflammatory effect,high-mobility group box 1 has also been shown to have beneficial pro-regenerative roles in central nervous system *** this narrative review,we provide a brief summary of the history of high-mobility group box 1 research and its characterization as a damage-associated molecular pattern,its downstream receptors,and intracellular signaling pathways,how high-mobility group box 1 exerts the repair-favoring roles in general and in the central nervous system,and clues on how to differentiate the pro-regenerative from the pro-inflammatory *** targeting high-mobility group box 1 in the central nervous system may benefit from differentiating between the two functions rather than overall suppression of high-mobility group box 1.

关键词： central nervous system damage-associated molecular pattern ethyl pyruvate glycyrhizzin high mobility group box 1 inflammation neural stem cells neurodevelopment oligodendrocyte progenitor cells redox status regeneration

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Film-Cooling Performance with Various Hole Length to Diameter Ratios for Cylindrical and Laidback Fan-Shaped Holes with an Inlet Groove

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Journal of Thermal Science 2025年第02期 607-625页

作者： PARK Jisu kim jun-Hee KANG Changwoo Department of Mechanical Engineering Jeonbuk National University Research Institute of Industrial Science & Technology 187-12 Geumho-ro Laboratory for Renewable Energy and Sector Coupling Jeonbuk National University

The influence of the hole length-to-diameter ratio on film-cooling performance is numerically investigated for a cylindrical hole and laidback fan-shaped hole with an inlet *** analysis of film-cooling is conducted by solving three-dimensional Reynolds-averaged Navier-Stokes equations(RANS)with a Realizable k-ε turbulence *** and triangular grooves are applied to the inlet of cylindrical and laidback fan-shaped *** ratio of the hole length(L) to the diameter(D),i.e.,L/D,is varied between 6-12 at blowing ratios(M) of 0.5 to 1.5 for the cylindrical hole and 0.5 to 3.0 for the laidback fan-shaped *** cylindrical holes with an inlet groove,the film-cooling effectiveness decreases as the L/D increases,regardless of the blowing ***,in the case of laidback fan-shaped holes,the cooling performance with the length-to-diameter ratios shows different tendencies for each blowing *** low blowing ratios(M=1.0),relatively high effects were observed with more than 5% increases in the effectiveness at L/D=10 and 12 compared to that of L/D=***,the performance is maximized at L/D=8 under high-blowing-ratio conditions(M=3.0).The cooling efficiency is enhanced up to 148% for square grooves and 124% for triangle grooves compared to those of L/D=6.

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Advancements in Passive Wireless Sensing Systems in Monitoring Harsh Environment and Healthcare Applications

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Nano-Micro Letters 2025年第5期17卷 145-192页

作者： Wei Yue Yunjian Guo Jong‐Chul Lee Enkhzaya Ganbold Jia-Kang Wu Yang Li Cong Wang Hyun Soo kim Young-Kee Shin jun-Ge Liang Eun-Seong kim Nam-Young kim RFIC Bio Centre Kwangwoon UniversitySeoul 01897South Korea Department of Electronic Convergence Engineering Kwangwoon UniversitySeoul 01897South Korea Department of Electronic Engineering Jiangnan UniversityWuxi 214122People’s Republic of China School of Microelectronics Shandong UniversityJinan 250101People’s Republic of China School of Electronics and Information Engineering Harbin Institute of TechnologyHarbin 150001People’s Republic of China Department of Electronics Engineering Kwangwoon UniversitySeoul 01897South Korea Laboratory of Molecular Pathology and Cancer Genomics Department of Molecular Medicine and Biopharmaceutical SciencesGraduate School of Convergence Science and TechnologySeoul National UniversitySeoul 08826South Korea

Recent advancements in passive wireless sensor technology have significantly extended the application scope of sensing,particularly in challenging environments for monitoring industry and healthcare *** systems are equipped with battery-free operation,wireless connectivity,and are designed to be both miniaturized and *** features enable the safe,real-time monitoring of industrial environments and support high-precision physiological measurements in confined internal body spaces and on wearable epidermal *** the exploration into diverse application environments,the development of a systematic and comprehensive research framework for system architecture remains elusive,which hampers further optimization of these *** review,therefore,begins with an examination of application scenarios,progresses to evaluate current system architectures,and discusses the function of each component—specifically,the passive sensor module,the wireless communication model,and the readout module—within the context of key implementations in target sensing ***,we present case studies that demonstrate the feasibility of proposed classified components for sensing scenarios,derived from this systematic *** outlining a research trajectory for the application of passive wireless systems in sensing technologies,this paper aims to establish a foundation for more advanced,user-friendly applications.

关键词： Wireless sensing Passive detection Harsh environment Biomedical monitoring Flexible sensors

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Adenosine triphosphate-binding pocket inhibitor for mixed lineage kinase domain-like protein attenuated alcoholic liver disease via necroptosis-independent pathway

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World Journal of Gastroenterology 2025年第6期31卷 44-61页

作者： Han-Ning Xuan Yuan Hyun Sung kim Gye Ryeol Park Jae Eun Ryu Ji Eun kim In Young Kang Hye Young kim Seung Min Lee Ju Hee Oh Eileen L Yoon Dae Won jun Department of Internal Medicine Hanyang University School of MedicineSeoul 04763South Korea Department of Pathology Hanyang University School of MedicineSeoul 04763South Korea Department of Translational Medicine Graduate School of Biomedical Science and EngineeringHanyang UniversitySeoul 04763South Korea Department of Obstetrics and Gynecology Institute of Women’s Medical Life ScienceYonsei Cancer CenterSeverance HospitalYonsei University College of MedicineSeoul 04763South Korea Department of Internal Medicine Sanggye Paik HospitalInje University College of MedicineSeoul 01757South Korea

BACKGROUND Mixed lineage kinase domain-like protein(MLKL)serves as a critical mediator in necroptosis,a form of regulated cell death linked to various liver *** study aims to specifically investigate the role of MLKL’s adenosine triphosphate(ATP)-binding pocket in facilitating necroptosis-independent pathways that may contribute to liver disease *** focusing on this mechanism,we seek to identify potential therapeutic targets that can modulate MLKL activity,offering new strategies for the prevention and treatment of liver-related *** To investigate the possibility of using the ATP-binding pocket-associated,necro-ptosis-independent MLKL pathway as a target for liver *** Cell death following necroptosis stimuli was evaluated using cell proliferation assays,flow cytometry,and electron microscopy in various *** human liver organoid system was used to evaluate whether the MLKL ATP pocket-binding inhibitor could attenuate ***,alcoholic and non-alcoholic fatty liver diseases animal models were used to determine whether MLKL ATP pocket inhibitors could attenuate liver *** While an MLKL ATP pocket-binding inhibitor did not prevent necroptosis-induced cell death in RAW 264.7 cells,it did reduce the necroptosis-led expression of CXCL2,ICAM,and ***,MLKL ATP pocket inhibitor diminishes the expression of CXCL2,ICAM,and VCAM by inhibiting the IκB kinase and nuclear factor kappa-B pathways without inducing necroptosis-induced cell death in two-dimensional cell culture as well as the human-derived liver organoid *** MLKL ATP-binding inhibitor was ineffective in non-alcoholic fatty liver disease animal models,MLKL ATP-binding inhibitor attenuated hepatic inflammation in the alcoholic liver disease *** MLKL ATP pocket-binding inhibitor exerted anti-inflammatory effects through the necroptosis-independent MLKL pathway in an animal model of alcoholic liver disease.

关键词： RAW 264.7 cell Cell death Necroptosis Mixed lineage kinase domain-like protein Non-alcoholic fatty liver disease Mixed lineage kinase domain-like protein adenosine triphosphate binding inhibitor Alcoholic liver disease

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Refractory lipoatrophy treated with autologous whole blood injection:A case report

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World Journal of Clinical Cases 2025年第2期13卷 33-38页

作者： Wonnam kim jun Su Park En Hyung kim Department of Pharmacology School of Korean MedicinePusan National UniversityYangsan 50612GyeongnamSouth Korea Department of Dermatology College of MedicineChungbuk National UniversityCheongju 28644ChungbukSouth Korea Department of Dermatology Chungbuk National University HospitalCheongju 28644ChungbukSouth Korea

BACKGROUND Intramuscular corticosteroid injection may cause adverse effects such as dermal and/or subcutaneous atrophy,alopecia,hypopigmentation,and *** cutaneous atrophy can spontaneously resolve,several treatment options have been suggested for this *** SUMMARY In this paper,we report a case of corticosteroid injection induced lipoatrophy treated with autologous whole blood(AWB)injection,as the condition had been unresponsive to fractional laser therapy.A 29-year-old female patient visited the dermatology clinic complaining of skin depression on her right buttock area,which had appeared six months *** had been only subtle improvement at the margins after fractional CO_(2) laser treatment;therefore,after obtaining informed consent from the patient,AWB treatment was *** month after the first AWB injection,the size and depth of the lesion had noticeably improved,and a slight improvement was also observed in *** Close observation is the initial treatment of choice for steroid induced skin atrophy;however,for patients in need of immediate cosmetic improvement,AWB injection may be a safe and cost-effective alternative.

关键词： Atrophy Corticosteroid Subcutaneous fat Autologous whole blood injection Laser therapy Case report

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Clinical and endoscopic characteristics of colorectal traditional serrated adenomas with dysplasia/adenocarcinoma in a Korean population

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World Journal of Gastrointestinal Oncology 2025年第2期17卷 119-131页

作者： Ki-Hyun kim Eun Myung Hyung Hoon Oh Chan-Muk Im Young-Eun Seo Je-Seong kim Chae-june Lim Ga-Ram You Sung-Bum Cho Wan-sik Lee Myung-Giun Noh Kyung-Hwa Lee Young-Eun Joo Department of Internal Medicine Chonnam National University Medical SchoolHwasun-eup 58128South Korea Department of Pathology Chonnam National University Medical SchoolHwasun-eup 58128South Korea

BACKGROUND Traditional serrated adenoma(TSA)is a rare and precancerous lesion of colorectal *** clinical and endoscopic differentiations between TSAs without dysplasia or adenocarcinoma(TSAOs)and TSAs with dysplasia or adenocarcinoma(TSADs)remain *** To evaluate the characteristics of colorectal TSAs and compare the characteristics of TSAOs with those of *** This retrospective study included 193 patients who underwent endoscopic resection and received a pathologic diagnosis of *** reviewed the medical,endoscopic,and histopathologic records of patients who underwent endoscopic resection of TSAs between January 2010 and December *** TSAs were more frequently located in the rectosigmoid *** TSAs had 0-Ip,0-Isp,or 0-Is *** TSAD lesions were larger than TSAO *** lesions more commonly had a red color and an irregular border than TSAO *** were usually treated using conventional endoscopic mucosal resection,whereas TSADs were treated using conventional endoscopic mucosal resection,endoscopic submucosal dissection,and ***-polypectomy bleeding was more common with TSADs than with *** analysis showed that gastrointestinal bleeding,red color,0-IIa,irregular border,and lobular mucosal surface were significantly associated with *** analysis showed that gastrointestinal bleeding,an irregular border,and a lobular mucosal surface were significantly associated with *** TSAs with gastrointestinal bleeding,an irregular border,and a lobular mucosal surface are associated with an increased risk of dysplasia or adenocarcinoma.

关键词： Traditional serrated adenoma Dysplasia Carcinoma Endoscopic features Gastrointestinal bleeding

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A hybrid storage technology for low power consumption and high I/O performance in an IPTV set-top box

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Journal of Central South University 2012年第5期19卷 1267-1275页

作者： kim Deok-hwan YANG jun-sik Department of Electronics Engineering Inha UniversityIncheon 402-751Korea

A new method of prefetching data blocks from the NVCache to the page cache in main memory and cascading prefetching n-blocks from a hard disk to the NVCache together was proposed to reduce the spin-up frequency of a hybrid hard disk drive and thus enhance I/O *** proposed method consists of three steps:1) Analyzing the pattern of read requests in block units;2) Determining the number of blocks prefetched to the NVCache;3) Replacing blocks in the NVCache according to the block replacement *** proposed method can reduce the latency time of a hybrid hard disk and optimize the power consumption of an IPTV set-top *** results show that the proposed method provides better average response time compared to an existing adaptive multistream prefetching(AMP) method by 25.17%.It also reduces by 20.83% the average power consumption over that of the existing external caching in energy saving storage system(EXCES) method.

关键词： IPTV set-top box hybrid hard disk prefetching spin-down low power consumption

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Reliability of flip-chip bonded RFID die using anisotropic conductive paste hybrid material

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Transactions of Nonferrous Metals Society of China 2011年第A01期21卷 175-181页

作者： jun-sik LEE jun-Ki kim Mok-Soon kim Namhyun KANG Jong-Hyun LEE Advanced Joining Technology Team/Microjoining Center Korea Institute of Industrial Technology(KITECH) Yeonsu-gu Incheon 406-840 Korea School of Materials Science & Engineering Inha University Department of Materials Science & Engineering Pusan National University Department of Materials Science & Engineering Seoul National University of Technology

A reliability of flip-chip bonded die as a function of anisotropic conductive paste (ACP) hybrid materials, bonding conditions, and antenna pattern materials was investigated during the assembly of radio frequency identification(RFID) inlay. The optimization condition for flip-chip bonding was determined from the behavior of bonding strength. Under the optimized condition, the shear strength for the antenna printed with paste-type Ag ink was larger than that for Cu antenna. Furthermore, an identification distance was varied from the antenna materials. Comparing with the Ag antenna pattern, the as-bonded die on Cu antenna showed a larger distance of identification. However, the long-term reliability of inlay using the Cu antenna was decreased significantly as a function of aging time at room temperature because of the bended shape of Cu antenna formed during the flip-chip bonding process.

关键词： RFID inlay ACP flip-chip, bonding process reliability

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