2025 연구성과 (45 / 151)

※ 컨트롤 + 클릭으로 열별 다중 정렬 가능합니다.
Excel 다운로드
WoS SCOPUS Document Type Document Title Abstract Authors Affiliation ResearcherID (WoS) AuthorsID (SCOPUS) Author Email(s) Journal Name JCR Abbreviation ISSN eISSN Volume Issue WoS Edition WoS Category JCR Year IF JCR (%) FWCI ⓘ FWCI Update Date WoS Citation SCOPUS Citation Keywords (WoS) KeywordsPlus (WoS) Keywords (SCOPUS) KeywordsPlus (SCOPUS) Language Publication Stage Publication Year Publication Date DOI JCR Link DOI Link WOS Link SCOPUS Link
○ ○ Article ⓘ Dihydrogeodin from Fennellia flavipes Modulates Platelet Aggregation via Downregulation of Calcium Signaling, αIIbβ3 Integrins, MAPK, and PI3K/Akt Pathways ⓘ Cardiovascular disease remains a leading cause of morbidity and mortality worldwide, frequently arising from platelet hyperactivation and subsequent thrombus formation. Although conventional antiplatelet therapies are available, challenges, such as drug resistance and bleeding complications, require the development of novel agents. In this study, dihydrogeodin (DHG) was isolated from Fennellia flavipes and evaluated using platelets derived from Sprague-Dawley rats. Platelet aggregation induced by collagen, adenosine diphosphate, or thrombin was assessed by light transmission aggregometry; DHG significantly reduced aggregation in a dose-dependent manner. Further assays demonstrated that DHG suppressed intracellular calcium mobilization, adenosine triphosphate release, and integrin alpha IIb beta 3-dependent fibrinogen binding, thereby impairing clot retraction. Western blot analysis revealed that DHG reduced the phosphorylation of mitogen-activated protein kinases (ERK, JNK, p38) and PI3K/Akt, indicating inhibition across multiple platelet-signaling pathways. Additionally, SwissADME-assisted pharmacokinetics predicted favorable properties without violations of the Lipinski (Pfizer) filter, Muegge (Bayer) filter, Ghose filter, Veber filter, and Egan filter, and network pharmacology revealed inhibition of calcium and MAPK pathways. These results highlight the potential of DHG as a novel antiplatelet agent with broad-spectrum activity and promising drug-like characteristics. Further studies are warranted to assess its therapeutic window, safety profile, and potential for synergistic use with existing antiplatelet drugs. ⓘ Akram, Abdul Wahab; Choi, Dae-Cheol; Chae, Hyung-Kyu; Kim, Sung Dae; Kwak, Dongmi; Yun, Bong-Sik; Rhee, Man Hee ⓘ Kyungpook Natl Univ, Coll Vet Med, Dept Vet Med, Daegu 41566, South Korea; Jeonbuk Natl Univ, Coll Environm & Bioresource Sci, Div Biotechnol, Gobong Ro 79, Iksan 54596, South Korea; Jeonbuk Natl Univ, Adv Inst Environm & Biosci, Coll Environm & Bioresource Sci, Gobong Ro 79, Iksan 54596, South Korea; Kyungpook Natl Univ, Inst Vet Biomed Sci, Coll Vet Med, Daegu 41566, South Korea ⓘ Rhee, Man/O-5705-2016 ⓘ 59166934200; 57224011716; 57194644489; 55156746000; 7007148758; 59708470800; 59914898600 ⓘ ab.wahab226@gmail.com; bsyun@jbnu.ac.kr; rheemh@knu.ac.kr; ⓘ MARINE DRUGS ⓘ MAR DRUGS ⓘ 1660-3397 23 5 SCIE CHEMISTRY, MEDICINAL;PHARMACOLOGY & PHARMACY ⓘ 2024 5.4 10.7 0 2025-06-11 ⓘ 0 0 dihydrogeodin; Fennellia flavipes; platelet aggregation; MAPK and PI3K/Akt pathways; marine natural products ⓘ ⓘ dihydrogeodin; Fennellia flavipes; MAPK and PI3K/Akt pathways; marine natural products; platelet aggregation ⓘ Animals; Blood Platelets; Calcium Signaling; Down-Regulation; Humans; Male; MAP Kinase Signaling System; Mitogen-Activated Protein Kinases; Phosphatidylinositol 3-Kinases; Platelet Aggregation; Platelet Aggregation Inhibitors; Platelet Glycoprotein GPIIb-IIIa Complex; Proto-Oncogene Proteins c-akt; Rats; Rats, Sprague-Dawley; Signal Transduction; adenosine diphosphate; adenosine triphosphate; alpha2bbeta3 integrin; antithrombocytic agent; benzofuran derivative; collagen; dihydrogeodin; fibrinogen; integrin; mitogen activated protein kinase; thrombin; unclassified drug; antithrombocytic agent; fibrinogen receptor; phosphatidylinositol 3 kinase; protein kinase B; alpha2bbeta3 integrin signaling; animal experiment; animal model; Article; Aspergillus flavipes; atp release assay; bioavailability; blood brain barrier; blood clot retraction; calcium mobilization; calcium mobilization assay; calcium signaling; carbon nuclear magnetic resonance; cell signaling assay; down regulation; fibrinogen binding assay; flow cytometry; light transmission aggregometry; lipophilicity; male; MAPK signaling; nonhuman; pharmacokinetics; phosphorylation; Pi3K/Akt signaling; platelet aggregation assay; polyacrylamide gel electrophoresis; protein expression; protein protein interaction; proton nuclear magnetic resonance; rat; scanning electron microscopy; signal transduction; systems pharmacology; thrombocyte aggregation; Western blotting; animal; down regulation; drug effect; human; isolation and purification; MAPK signaling; metabolism; Sprague Dawley rat; thrombocyte ⓘ English 2025 2025-05-17 10.3390/md23050212 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Ring-opening metathesis polymerization of Norbornene-derived cyclic olefins using Iminomethyl-hydroxyl-ligated tungsten Complexes: Fast reaction and tunable cis/trans selectivity ⓘ Highly active tungsten complexes supported by (Z)-1-(((2-hydroxyphenyl)imino)methyl)naphthalen-2-ol (LA) and (Z)-4-chloro-2-(((2-hydroxyphenyl)imino)methyl)phenol (LB) were synthesized and characterized. The ring- opening metathesis polymerization activities were assessed using i Bu 3 Al as the co-initiator at room temperature. A 100% conversion of norbornene to high-molecular-weight polynorbornene (PNB) was obtained within 10 min with tunable cis/trans selectivity of resultant polymer depending on the ligand architecture. ⓘ Nayab, Saira; Lee, Hyosun; Lee, Sang-Ho ⓘ Shaheed Benazir Bhutto Univ, Dept Chem, Sheringal Dir U 18050, Khyber Pakhtunk, Pakistan; Kyungpook Natl Univ, Green Nano Mat Res Ctr, Dept Chem, 80 Daehakro, Daegu 41566, South Korea; Dongguk Univ, Dept Chem & Biochem Engn, Seoul 04620, South Korea ⓘ ; Nayab, Saira/JBS-3013-2023 ⓘ 36490286400; 15750846000; 58743026900 ⓘ hyosunlee@knu.ac.kr; slee24@dgu.ac.kr; ⓘ INORGANIC CHEMISTRY COMMUNICATIONS ⓘ INORG CHEM COMMUN ⓘ 1387-7003 1879-0259 171 SCIE CHEMISTRY, INORGANIC & NUCLEAR ⓘ 2024 5.4 10.7 0 2025-05-07 ⓘ 0 0 Tungsten complexes; X-ray structures; Cyclic olefin; Polynorbornene ⓘ IMIDO ALKYLIDENE; ROMP; MOLYBDENUM; CATALYST; POLYMERS; BEHAVIOR; MO ⓘ Cyclic olefin; Polynorbornene; Tungsten complexes; X-ray structures ⓘ ⓘ English 2025 2025-01 10.1016/j.inoche.2024.113580 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Updates on medical and surgical managements of diabetic retinopathy and maculopathy ⓘ Diabetic retinopathy (DR) and diabetic macular edema (DME) are leading causes of vision loss globally. This is a comprehensive review focused on both medical and surgical management strategies for DR and DME. This review highlights the epidemiology of DR and DME, with a particular emphasis on the Asia-Pacific region, urban- rural disparities, ethnic variations, and grading methodologies. We examine various risk factors for DR, including glycemic control, hypertension, hyperlipidemia, obesity, chronic kidney disease, sex, myopia, pregnancy, and cataract surgery. Furthermore, we explore potential biomarkers in serum, proteomics, metabolomics, vitreous, microRNA, and genetics that may aid in the detection and management of DR. In addition to medical management, we review the evidence supporting systemic and ocular treatments for DR/DME, including anti- -vascular endothelial growth factor (anti-VEGF) agents, anti-inflammatory agents, biosimilars, and integrin inhibitors. Despite advancements in treatment options such as pan-retinal photocoagulation and anti-VEGF agents, a subset of cases still progresses, necessitating vitrectomy. Challenging diabetic vitrectomies pose difficulties due to complex fibrovascular proliferations, incomplete posterior vitreous detachment, and fragile, ischemic retinas, making membrane dissection risky and potentially damaging to the retina. In this review, we address the question of challenging diabetic vitrectomies, providing insights and strategies to minimize complications. Additionally, we briefly explore newer modalities such as 3-dimensional vitrectomy and intra operative optical coherence tomography as potential tools in diabetic vitrectomy. In conclusion, this review provides a comprehensive overview of both medical and surgical management options for DR and DME. It un- derscores the importance of a multidisciplinary approach, tailored to the needs of each patient, to optimize visual outcomes and improve the quality of life for those affected by these sight-threatening conditions. ⓘ Chen, Yen-Ting; V. Radke, Nishant; Amarasekera, Sohani; Park, Dong Ho; Chen, Nelson; Chhablani, Jay; Wang, Nan-Kai; Wu, Wei-Chi; Ng, Danny S. C.; Bhende, Pramod; Varma, Shobhit; Leung, Enne; Zhang, Xiulan; Li, Fei; Zhang, Shaochong; Fang, Dong; Liang, Jia; Zhang, Zheming; Liu, Huanyu; Zhao, Peiquan; Sharma, Tarun; Ruamviboonsuk, Paisan; Lai, Chi-Chun; Lam, Dennis S. C. ⓘ Chang Gung Mem Hosp, Dept Ophthalmol, Linkou, Taiwan; New Taipei Municipal Tucheng Hosp, Dept Ophthalmol, New Taipei, Taiwan; Chang Gung Univ, Coll Med, Taoyuan, Taiwan; Chinese Univ Hong Kong Shenzhen, Primasia Int Eye Res Inst PIERI, Shenzhen, Peoples R China; Univ Pittsburgh, Med Ctr, Dept Ophthalmol, Pittsburgh, PA USA; Kyungpook Natl Univ, Kyungpook Natl Univ Hosp, Sch Med, Dept Ophthalmol, Daegu, South Korea; BK21 FOUR KNU Convergence Educ Program Biomed Sci, Daegu, South Korea; Queens Univ, Dept Biomed & Mol Sci, Kingston, ON, Canada; Columbia Univ, Edward S Harkness Eye Inst, Med Ctr, Dept Ophthalmol, New York, NY USA; Chinese Univ Hong Kong, Dept Ophthalmol & Visual Sci, Hong Kong, Peoples R China; Sankara Nethralaya, Med Res Fdn, Chennai, India; Sun Yat Sen Univ, Guangdong Prov Clin Res Ctr Ocular Dis, Guangdong Prov Key Lab Ophthalmol & Visual Sci, State Key Lab Ophthalmol,Zhongshan Ophthalm Ctr, Guangzhou, Peoples R China; Southern Med Univ, Shenzhen Eye Hosp, Shenzhen Eye Med Ctr, Shenzhen, Peoples R China; Sun Yat sen Univ, Zhongshan Ophthalm Ctr, State Key Lab Ophthalmol, Guangzhou, Peoples R China; Shanghai Jiao Tong Univ, Dept Ophthalmol, Xin Hua Hosp Affiliated, Sch Med, Shanghai, Peoples R China; Columbia Univ, Dept Ophthalmol, New York, NY USA; Rangsit Univ, Rajavithi Hosp, Coll Med, Dept Ophthalmol, Bangkok, Thailand; Chang Gung Mem Hosp, Dept Ophthalmol, 222 Maijin Rd, Keelung 204, Taiwan ⓘ Chhablani, Jay/F-6241-2012; Wang, Nan-Kai/D-6608-2011; Ng, Danny/AAG-3081-2020 ⓘ 57215424212; 36059983700; 57208189660; 36676632900; 57226387139; 57218216682; 34877866400; 24469425800; 57022175400; 6603737038; 57214626123; 57242507500; 7410272138; 56297335800; 7409374962; 57201215164; 57417970800; 59055715700; 58500614500; 14068218200; 59462756900; 56073264000; 7403086404; 35500200200 ⓘ chichun.lai@gmail.com; dlam.pub.pieri.cuhk.sz@gmail.com; ⓘ ASIA-PACIFIC JOURNAL OF OPHTHALMOLOGY ⓘ ASIA-PAC J OPHTHALMO ⓘ 2162-0989 14 2 SCIE OPHTHALMOLOGY ⓘ 2024 4.5 10.7 0 2025-05-07 ⓘ 0 0 Diabetic retinopathy; Diabetic macular edema; Medical management; Surgical; Management; Epidemiology ⓘ OPTICAL COHERENCE TOMOGRAPHY; PARS-PLANA VITRECTOMY; INTRAVITREAL BEVACIZUMAB AVASTIN; TRACTION RETINAL-DETACHMENT; CHRONIC KIDNEY-DISEASE; MACULAR EDEMA; RISK-FACTORS; EYE DISEASE; PANRETINAL PHOTOCOAGULATION; PERFLUOROCARBON LIQUID ⓘ Diabetic macular edema; Diabetic retinopathy; Epidemiology; Management; Medical management; Surgical ⓘ Diabetic Retinopathy; Humans; Macular Edema; Risk Factors; Vitrectomy; diabetic retinopathy; diagnosis; etiology; human; macular edema; procedures; risk factor; surgery; vitrectomy ⓘ English 2025 2025 (MAR-APR) 10.1016/j.apjo.2025.100180 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Development of chickpea tempeh using Rhizopus oryzae for dysphagia diet: Effect of fermentation time and heat treatment ⓘ Patients with dysphagia must manage their health with an appropriate diet. Chickpea tempeh is a nutritious source of carbohydrates and proteins, but its texture modification is necessary to suit varying severities of dysphagia, according to the International Dysphagia Diet Standardization Initiative (IDDSI) Framework. This study assessed the effects of fermentation time and heat treatment for development of tempeh classified as IDDSI level 6. The physicochemical and structural properties of tempeh were investigated, with a focus on biological changes during fermentation. Tempeh was prepared by grinding chickpeas to particle size of 3.50 +/- 0.22 mm and fermenting for 24, 36, 48, 60, and 72 h using Rhizopus oryzae. During fermentation, the biological properties of tempeh changed, resulting in more white mold mycelia (cake) and the release of amylase and protease enzymes. Before cooking, tempeh exhibited increased hardness and brittleness by cake, as well as pH, total soluble solids, and DPPH increased by enzymetic activity. Fungal enzymes and heat treatment (175 degrees C) changed the rough and aggregated microstructure and molecular structure of chickpeas, as confirmed by scanning electron microscopy and Fourier transform infrared spectroscopy. The texture of cooked tempeh became softer and less brittle by fermentation time, attributed to weakening of cake bonds and enzymatic softening of chickpeas. IDDSI Framework results classified 24 and 36 h fermentation as level 7, and 48, 60, and 72 h fermentation as level 6. Tempeh with modified texture by heat treatment and controlled fermentation time may contribute to the improved health of patients with dysphagia. ⓘ Kim, Jung Soo; Kim, Jiyoon; Kim, Soo Hyun; Moon, Kwang-Deog ⓘ Kyungpook Natl Univ, Sch Food Sci & Biotechnol, Daegu 41566, South Korea ⓘ ⓘ 57211108486; 57208110209; 59410068300; 55999192900 ⓘ kdmoon@knu.ac.kr; ⓘ INNOVATIVE FOOD SCIENCE & EMERGING TECHNOLOGIES ⓘ INNOV FOOD SCI EMERG ⓘ 1466-8564 1878-5522 100 SCIE FOOD SCIENCE & TECHNOLOGY ⓘ 2024 6.8 10.8 0 2025-05-07 ⓘ 0 0 Solid-state fermentation; Fungi; Biological changes; Texture; IDDSI framework ⓘ CICER-ARIETINUM L.; NUTRITIONAL ASPECTS; ANTIOXIDANT; TEXTURE; PROTEIN; FLOUR ⓘ Biological changes; Fungi; IDDSI framework; Solid-state fermentation; Texture ⓘ Amylases; Brinell Hardness; Brittleness; Rockwell hardness; Biological changes; Classifieds; Fermentation time; International dysphagia diet standardization initiative framework; Particles sizes; Physico-chemicals; Property; Rhizopus oryzae; Solid-state fermentation; Texture modification; Fungi ⓘ English 2025 2025-03 10.1016/j.ifset.2025.103940 ⓘ 바로가기 바로가기 바로가기 바로가기
○ Article ⓘ Mildew resistance locus O (MLO)-edited petunia shows reduced seed germination, seed set, seed vigor, and growth ⓘ In this study, we evaluated the impact of editing the powdery mildew-susceptible gene MLO1 in Petunia hybrida cv. ‘Mirage Rose’ using CRISPR/Cas9. We evaluated plant growth, seed physiology, pollen viability and germination, and gibberellin (GA)-associated gene expression. The mlo1 mutants exhibited delayed seed germination, reduced plant growth, delayed flowering, and lower seed set and weight compared to wild type (WT). While pollen viability and germination were not significantly affected in the mlo1-14 mutant, both were notably reduced in the mlo1-25 mutant. Expression analysis revealed significantly higher levels of GA biosynthesis and receptor genes in the mutants, suggesting alterations in the GA signaling pathways. Application of exogenous GA3 effectively mitigated growth inhibition in the mutants, aligning their growth parameters with those of WT. Our findings underscore the complex role of MLO1 in regulating plant growth and development, likely through modulation of the GA signaling pathways. This study highlights the trade-offs associated with MLO1 editing for powdery mildew resistance, including impacts on plant growth and reproductive success, and demonstrates the potential of GA3 application in counteracting these effects. Collectively, this study suggests that the growth penalty and impaired seed physiology caused by the mlo1 mutation must be considered when attempting to edit MLO1 for powdery mildew toleration in ornamental plants, as these drawbacks can severely impact the plants’ utility in the floricultural industry. © Agricultural Information Institute, Chinese Academy of Agricultural Sciences 2024. ⓘ Naing, Aung Htay; Campol, Jova Riza; Aung, Hay Mon; Kang, Hyunhee; Cho, Su Bin; Ahn, Yun-Jae; Xu, Junping; Chung, Mi Young; Kim, Chang Kil ⓘ Department of Horticultural Science, Kyungpook National University, Daegu, 41566, South Korea; Department of Horticultural Science, Kyungpook National University, Daegu, 41566, South Korea; Department of Horticultural Science, Kyungpook National University, Daegu, 41566, South Korea; Department of Horticultural Science, Kyungpook National University, Daegu, 41566, South Korea; Department of Horticultural Science, Kyungpook National University, Daegu, 41566, South Korea; Department of Horticultural Science, Kyungpook National University, Daegu, 41566, South Korea; Life Science and Technology School, Lingnan Normal University, Zhanjiang, 524048, China; Department of Agricultural Education, Sunchon National University, Suncheon, 57922, South Korea; Department of Horticultural Science, Kyungpook National University, Daegu, 41566, South Korea ⓘ ⓘ 37112768100; 57486378900; 59335761100; 57217681910; 59335432900; 57196473453; 56677024300; 24821361600; 7409880701 ⓘ ckkim@knu.ac.kr; ⓘ aBIOTECH ⓘ ABIOTECH ⓘ 2096-6326 2662-1738 ESCI PLANT SCIENCES;BIOTECHNOLOGY & APPLIED MICROBIOLOGY ⓘ 2024 5 10.8 0 2025-05-07 ⓘ 0 ⓘ ⓘ Gene expression; mlo1 mutants; Plant organs; Pollen germination; Stem elongation ⓘ Gene expression; Seed; Genes expression; Mlo1 mutant; Plant growth; Plant organs; Pollen germination; Powdery mildew; Seed germination; Seed physiology; Seed-set; Stem elongations; Plant diseases ⓘ English Article in press 2025 10.1007/s42994-024-00187-z ⓘ 바로가기 바로가기 바로가기
○ Article ⓘ Reductive transformation of oxyanion-containing jarosite by iron-reducing bacteria: Effects of mineral precipitation on the mobility of potentially toxic elements ⓘ Jarosite can co-precipitate with hazardous oxyanions and reduce their concentration. However, the redox conditions significantly affect the mobility of these elements. We investigated the mineral phase change and mobility changes of oxyanions in jarosite containing different mole percentages of arsenate (AsO43-), chromate (CrO42-), molybdate (MoO42-), selenate (SeO42-), and selenite (SeO32-) during reduction by Shewanella putrefaciens. The mineralogical and chemical changes were characterized using X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM/TEM), and inductively coupled plasma-optical emission spectroscopy (ICP-OES). The mole percentage and oxyanion species significantly affected the mineral transformation and mobility changes during the reduction process. The 2-mole percentage oxyanions generally showed faster mineral phase transformation than 10-mole percent, likely due to the inhibition of reductive dissolution at high oxyanion concentrations and the toxicity of CrO₄²⁻. The reduction process greatly enhanced the iron concentration, mineral transformation, and the mobility of these elements compared to the abiotic controls. Goethite was precipitated first, followed by siderite. This process eventually reduced the dissolved iron concentration and led to a decrease in dissolved oxyanions due to their adsorption onto the surfaces of these newly formed minerals. Extra mineral precipitation, parasymplesite for AsO4-jarosite, selenium particles for SeO4- and SeO3-jarosite, and iron selenide for 10-mole percent SeO3-jarosite, contributed to an additional decrease in these two elements in solution. Our results show that the reduction process by bacteria plays an important role in the cycle of iron and mobility changes of oxyanions. © 2025 ⓘ Lee, Myoungsin; Kim, Yumi; Roh, Yul; Kim, Yeongkyoo ⓘ School of Earth System Sciences, Kyungpook National University, Daegu, 41566, South Korea; Department of Earth and Environmental Sciences, Chonnam National University, Gwangju, 61186, South Korea; Department of Earth and Environmental Sciences, Chonnam National University, Gwangju, 61186, South Korea; School of Earth System Sciences, Kyungpook National University, Daegu, 41566, South Korea ⓘ ⓘ 59970408700; 57030702200; 55653067300; 7410207179 ⓘ ygkim@knu.ac.kr; ⓘ Journal of Hazardous Materials Advances ⓘ J HAZARD MATER ADV ⓘ 2772-4166 2772-4166 19 ESCI ENVIRONMENTAL SCIENCES;ENGINEERING, ENVIRONMENTAL ⓘ 2024 7.7 10.8 ⓘ 0 ⓘ ⓘ Acid mine drainage; Fe(III)-reducing bacteria; Iron mineral; Jarosite; Mineral precipitation ⓘ ⓘ English Final 2025 10.1016/j.hazadv.2025.100804 ⓘ 바로가기 바로가기 바로가기
○ ○ Article ⓘ Wide-Field High-Speed Scanning Acoustic/Photoacoustic Microscopy for Whole-Body Imaging of Small Animals ⓘ Photoacoustic (PA) imaging combines optical contrast with ultrasound (US) detection, enabling high-resolution imaging of biological tissues with greater penetration depth than conventional optical techniques. Among its various implementations, photoacoustic microscopy (PAM) achieves micrometer-scale resolution by focusing laser excitation and detecting ultrasonic signals, allowing for the detailed visualization of microvascular structures and fine tissue morphology. Over the last decade, PAM imaging speed has significantly increased by adopting PA scanners that steer optical and acoustic waves. However, these scanners must be placed after focusing optics to co-align the waves on a spot, which creates bent focal lines along the scanning direction and limits the scanning range. To achieve wide-field imaging, various image mosaic algorithms have been applied, but these methods require multiple manual operations, which take more time than the imaging itself. In this study, we developed a wide-field, high-speed scanning acoustic/photoacoustic microscopy (SA/PAM) system equipped with a transparent ultrasound transducer and a moving magnet linear stage, which eliminates the need for complex mosaic algorithms. This system enables wide-field imaging up to 50 x 50 mm2 while maintaining high lateral resolution, achieving an imaging speed of 50 Hz in a B-scan image. Through in vivo mouse US/PA imaging, the system demonstrated its capability to visualize blood vessels and organs across the whole body of small animals. These findings suggest that the SA/PAM system is a practical tool for biomedical research, allowing for efficient visualization of vascular networks and anatomical structures in various preclinical studies. ⓘ Ahn, Joongho; Choi, Hyoseok; Lim, Seongjun; Kim, Jin Young; Park, Jeongwoo ⓘ Pohang Univ Sci & Technol, Med Device Innovat Ctr, Dept Elect Engn & Convergence IT Engn, Pohang 37673, South Korea; Opticho Inc, Pohang 37673, South Korea; Kyungpook Natl Univ, Dept Biomed Convergence Sci & Technol, Daegu 41566, South Korea; Kyungpook Natl Univ, Dept Adv Bioconvergence, Daegu 41566, South Korea; Kyungpook Natl Univ, Cell & Matrix Res Inst, Daegu 41944, South Korea ⓘ Park, Jeongwoo/LIC-1971-2024 ⓘ 57194204029; 59752199700; 59752771600; 50461757700; 57205588351 ⓘ joongho.ahn@postech.ac.kr; hyoseokchoi@postech.ac.kr; sjgj0624@knu.ac.kr; ronsan@postech.ac.kr; jwpark@knu.ac.kr; ⓘ BIOSENSORS-BASEL ⓘ BIOSENSORS-BASEL ⓘ 2079-6374 15 4 SCIE CHEMISTRY, ANALYTICAL;INSTRUMENTS & INSTRUMENTATION;NANOSCIENCE & NANOTECHNOLOGY ⓘ 2024 5.6 10.8 0 2025-05-07 ⓘ 0 0 multimodal imaging; preclinical imaging; photoacoustic imaging; ultrasound imaging; transparent ultrasound transducer ⓘ RESOLUTION PHOTOACOUSTIC MICROSCOPY; DRUG-DELIVERY; BLOOD OXYGENATION; SENSITIVITY; TOMOGRAPHY ⓘ multimodal imaging; photoacoustic imaging; preclinical imaging; transparent ultrasound transducer; ultrasound imaging ⓘ Algorithms; Animals; Mice; Microscopy; Microscopy, Acoustic; Photoacoustic Techniques; Whole Body Imaging; Acoustic microscopes; Invertebrates; Mammals; Photoacoustic microscopy; Thermography (imaging); Ultrasonic imaging; Ultrasonic sensors; Ultrasonic testing; Ultrasonic transducers; High speed scanning; Imaging speed; Multimodal imaging; Photo-acoustic imaging; Preclinical imaging; Small Animal; Transparent ultrasound transducer; Ultrasound imaging; Ultrasound transducers; Wide-field; animal experiment; Article; blood vessel; female; mouse; nonhuman; photoacoustic microscopy; ultrasound; whole body imaging; wide field high speed scanning acoustic photoacoustic microscopy; acoustic microscopy; algorithm; animal; microscopy; photoacoustics; procedures; Laser excitation ⓘ English 2025 2025-03-21 10.3390/bios15040200 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ A stable ZnMn2O4 cathode for aqueous Zn-ion batteries via Ni doping to suppress Mn dissolution ⓘ ZnMn2O4 (ZMO) emerges as a promising cathode for aqueous Zn-ion batteries due to its high theoretical capacity of 224 mAh g(-1) and operating voltage of similar to 1.9 V (vs. Zn2+/Zn). However, it suffers from capacity degradation over cycling, attributed to the dissolution of redox-active Mn through Mn3+ disproportionation. In this study, we propose a strategy to stabilize ZMO cathodes by transforming Mn3+ into Mn4+ via Ni doping, aiming for charge balance. The ZnMn2-xNixO4 (x = 0, 0.5, 1.0, and 1.5) with different Ni amounts was prepared by straightforward precipitation and calcination. The mitigation of redox-active Mn dissolution enhanced the specific capacity of all Ni-doped ZMO compared to 201 mAh g(-1) of ZMO. ZnMn1.5Ni0.5O4 and ZnMnNiO4 exhibit 277 and 278 mAh g(-1), respectively, surpassing ZMO's theoretical capacity (224 mAh g(-1)) of ZMO. This additional capacity was attributed to MnOx deposition on the cathode and the charge storage reaction with Zn-ion within the MnOx deposit. Furthermore, Ni doping induces a structural transition of the tetragonal into a cubic spinel, expanding the unit cell volume. This structural modification combined with suppressed Mn dissolution contributes to improved cycling stability. ZnMnNiO4 exhibits 80 % retention of initial capacity after 1000 cycles, outperforming ZMO (57 % retention). The expanded unit cell reduces repulsion between inserted Zn ions, enabling a higher rate performance than pure ZMO. The change in Mn valence states induced by Ni doping enhanced the lifespan and rate capability of ZMO cathodes, underscoring their potential as cathodes for Zn-ion batteries. ⓘ Kang, San Chun; Hyeon, Chang-Wan; Yoo, Seung-Yeop; Park, Jae Young; Kim, Young Jo; Chung, Chan-Yeup; Chun, Sang-Eun ⓘ Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea; Kyungpook Natl Univ, Innovat Semicond Educ & Res Ctr Future Mobil, 80 Daehak Ro, Daegu 41566, South Korea; Kyungpook Natl Univ, Res Inst Automot Parts & Mat, 80 Daehak Ro, Daegu 41566, South Korea; Kyungpook Natl Univ, Dept Hydrogen & Renewable Energy, 80 Daehak Ro, Daegu 41566, South Korea; Univ New Hampshire, Dept Chem Engn, Durham, NH 03824 USA; Korea Inst Ceram Engn & Technol, Ctr Mat Digitalizat, Jinju 52851, South Korea ⓘ ; chun, sang-eun/I-7271-2012; Chung, Chanyeup/LRT-1409-2024; Park, Jae/AAQ-8991-2021 ⓘ 59383319700; 58991258900; 59383319800; 36066776800; 59621605500; 9247635900; 36801080300 ⓘ chanyeup.chung@gmail.com; sangeun@knu.ac.kr; ⓘ JOURNAL OF ALLOYS AND COMPOUNDS ⓘ J ALLOY COMPD ⓘ 0925-8388 1873-4669 1010 SCIE CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING ⓘ 2024 6.3 10.9 2.35 2025-05-07 ⓘ 1 1 Zn-ion battery; Valence state; Ni doping; Mn dissolution; Stability; ZnMn2O4 ⓘ DOPED LIMN2O4 SPINEL; ELECTROCHEMICAL PERFORMANCE; CAPACITY RETENTION; CYCLING STABILITY; MANGANESE OXIDE; LI; CO; NANOSHEETS; WATER ⓘ Mn dissolution; Ni doping; Stability; Valence state; Zn-ion battery; ZnMn<sub>2</sub>O<sub>4</sub> ⓘ Manganese alloys; Manganese compounds; Manganese deposits; Redox reactions; Semiconductor doping; A-stable; Ion batteries; Mn dissolutions; Ni-doping; Operating voltage; Redox-active; Theoretical capacity; Valence state; Zn ions; Zn-ion battery; Nickel ⓘ English 2025 2025-01-05 10.1016/j.jallcom.2024.177165 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Case Report: Clinical and histopathological findings of porcelain gallbladder in a dog ⓘ Porcelain Gallbladder (PGB) is a condition marked by extensive calcification and thickening of the gallbladder wall. PGB is extremely rare in dogs. The exact mechanism of PGB remains unclear. However, chronic cholecystitis and factors such as biliary hyperplasia, mucin hypersecretion, and cystic duct obstruction can lead to fibrosis and calcification of the gallbladder wall, potentially resulting in PGB. A 13-year-old spayed female Shih Tzu presented with anorexia, lethargy, vomiting, and weight loss. Physical exams showed mild epigastric pain. Blood tests indicated mild alanine aminotransferase (ALT) elevation, significant alkaline phosphatase, and gamma-glutamyl transferase (GGT) increases. Hyperlipidemia, hypercholesterolemia, and elevated canine pancreatic lipase (cPL) were also noted. Diagnostic imaging revealed extensive gallbladder wall calcification and thickening, choleliths, mild bile duct dilation, pancreatitis, and duodenitis. Cholecystectomy was performed, and symptomatic treatment for pancreatitis and duodenitis was administered. Histopathological examination is essential for confirming PGB by identifying calcification of the gallbladder wall. Histopathological examination of the gallbladder revealed severe papillary hyperplasia, mucin hypersecretion, multiple ulcers, diffuse calcification, and fibrotic changes. These findings confirmed the diagnoses of gallbladder mucocele and PGB. Postoperatively, biochemical markers normalized or significantly decreased, with clinical improvement observed. This study presents the rare occurrence of PGB in dogs and emphasizes the importance of appropriate veterinary intervention for improving clinical outcomes. ⓘ Kim, Tae-Young; Oh, Ye-In ⓘ Jukjeon Anim Med Ctr, Dalgubeol Daero, Daegu, South Korea; Kyungpook Natl Univ, Coll Vet Med, Dept Vet Internal Med, Daegu, South Korea; Kyungpook Natl Univ, Inst Vet Biomed Sci, Daegu, South Korea ⓘ Kim, Yong-Tae/HQZ-0240-2023 ⓘ 59925722900; 36466903200 ⓘ imyein5@knu.ac.kr; ⓘ FRONTIERS IN VETERINARY SCIENCE ⓘ FRONT VET SCI ⓘ 2297-1769 12 SCIE VETERINARY SCIENCES ⓘ 2024 2.9 10.9 0 2025-06-11 ⓘ 0 0 porcelain gallbladder; calcification; fibrosis; gallbladder mucocele; cholecystitis ⓘ BILIARY SURGERY; CARCINOMA; CALCIFICATION; MUCOCELE; CALCIUM; DISEASE; CANINE; RISK; BILE ⓘ calcification; cholecystitis; fibrosis; gallbladder mucocele; porcelain gallbladder ⓘ ademetionine; alanine aminotransferase; alkaline phosphatase; antiemetic agent; C reactive protein; calcium; CD3 antigen; dexamethasone; eosin; gamma glutamyltransferase; glycogen; hematoxylin; maropitant; mucin; omeprazole; Ringer lactate solution; silymarin; thyrotropin; transcription factor PAX5; triacylglycerol lipase; ursodeoxycholic acid; abdominal radiography; alanine aminotransferase blood level; alkaline phosphatase blood level; animal cell; animal tissue; anorexia; Article; B lymphocyte; bile duct dilatation; body weight loss; calcification; castrated female; cholecystectomy; cholelithiasis; chronic inflammation; clinical feature; clinical outcome; common bile duct; computer assisted tomography; dexamethasone suppression test; diagnostic imaging; duodenitis; epigastric pain; female; fibrosis; fluid therapy; follow up; gallbladder wall; gamma glutamyl transferase blood level; gastrointestinal discomfort; histopathology; hypercholesterolemia; hyperlipidemia; hyperplasia; immunohistochemistry; inflammation; inflammatory cell; intrahepatic bile duct; intraoperative period; lamina propria; lethargy; leukocyte count; low drug dose; mucocele; nonhuman; pain severity; palliative therapy; palpation; pancreatic duct; pancreatitis; physical examination; plasma cell; porcelain gallbladder; Shih Tzu; soreness; stomach acid; tissue injury; ulcer; vomiting ⓘ English 2025 2025-05-20 10.3389/fvets.2025.1570221 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Characterization and H2S gas sensing characteristics of Au-decorated ZnO nanorods prepared by a two-step wet method ⓘ H2S is a highly corrosive and toxic gas, necessitating the realization of sensitive and selective sensors for its detection. In this study, we employed gold (Au) decoration on zinc oxide (ZnO) nanorods (NRs) for H2S gas sensing. The Au-decorated ZnO (Au-ZnO) NRs were synthesized via a hydrothermal method at 90 degrees C for 5 h. Various characterizations confirmed the formation of Au-ZnO NRs with an NR morphology, uniform dispersion of Au nanoparticles (NPs) on ZnO NRs, and the desired chemical composition. H2S sensing was conducted at different temperatures for pristine and Au-ZnO NR-based gas sensors. Both sensors manifested optimal performance at 250 degrees C. The responses to 10 ppm H2S for the pristine and Au-ZnO NRs sensors were 4.93 and 89.57, respectively, underscoring the significant enhancement in H2S sensing due to Au decoration. Furthermore, the Au-ZnO NR sensor could detect H2S at concentrations as low as 200 ppb, demonstrating high selectivity to H2S. The improved sensing capability is attributed to the catalytic effect of Au on H2S, the generation of Au-ZnO heterojunctions, and the creation of oxygen vacancies. This study highlights the promising potential of Au decoration for enhancing H2S sensing capabilities. ⓘ Shin, Jiyeon; Choi, Sun-Woo; Kim, Changyu; Park, Jimyeong; Roh, Jong Wook; Hwang, Jeong Yun; Mirzaei, Ali; Jin, Changhyun; Choi, Myung Sik ⓘ Kyungpook Natl Univ, Sch Adv Sci & Technol Convergence, Sangju 37224, South Korea; Kangwon Natl Univ, Dept Mat Sci & Engn, Samcheok 25912, South Korea; Kyungpook Natl Univ, Dept Nano & Adv Mat Sci & Engn, Sangju 37224, South Korea; Yonsei Univ, Dept Mat Sci & Engn, Seoul 03722, South Korea; Shiraz Univ Technol, Dept Mat Sci & Engn, Shiraz 7155713876, Iran ⓘ Mirzaei, Ali/J-8849-2019 ⓘ 57994575600; 35106725800; 59125659400; 59125311500; 25638796100; 57215200308; 57196467909; 35177895100; 57190737942 ⓘ mirzaei@sutech.ac.ir; z8015026@yonsei.ac.kr; ms.choi@knu.ac.kr; ⓘ JOURNAL OF ALLOYS AND COMPOUNDS ⓘ J ALLOY COMPD ⓘ 0925-8388 1873-4669 1021 SCIE CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING ⓘ 2024 6.3 10.9 0 2025-05-07 ⓘ 0 1 ZnO NRs; Au-decoration; H2S gas; Gas sensor; Selectivity ⓘ ROOM-TEMPERATURE; SENSOR; NANOCOMPOSITES; SELECTIVITY; SURFACE ⓘ Au-decoration; Gas sensor; H<sub>2</sub>S gas; Selectivity; ZnO NRs ⓘ Chemical detection; Gas detectors; Gas sensing electrodes; Gold coatings; Gold nanoparticles; Hydrothermal synthesis; Nanorods; ZnO nanoparticles; Au-decoration; Corrosive gas; Gas sensing characteristics; Gas-sensors; H2S gas; Selectivity; Toxic gas; Wet method; Zinc oxide nanorods; ZnO nanorod; Chemical sensors ⓘ English 2025 2025-04-05 10.1016/j.jallcom.2025.179655 ⓘ 바로가기 바로가기 바로가기 바로가기
○ Article ⓘ Dual-sensitized hollow SnO2 nanospheres with rGO and Pd for highly sensitive detection of acetone in exhaled breath ⓘ Detecting acetone in human breath is crucial for the early diagnosis of metabolic disorders such as diabetes. Metal oxide semiconductor (MOS) based acetone breath sensors have received considerable attention due to their compactness and noninvasive nature. However, their limited sensitivity and interference from humidity present challenges in selectively detecting acetone. Herein, we propose sensors based on tin oxide hollow spheres dual-sensitized with reduced graphene oxide and ultrafine palladium nanoparticles (rGO-Sn-HS-Pd) for enhanced and selective detection of acetone. The Sn-HS are synthesized using a spray pyrolysis technique, followed by a hydrothermal process to achieve the rGO-Pd-NPs dual-sensitized SnO2 hollow spheres. The rGO-Sn-HS-Pd sensor demonstrate high sensitivity to acetone, exceptional selectivity, and fast response/ recovery. Furthermore, by utilizing a linear fitting approach on the experimental response data for acetone concentrations, it is estimated that the rGO2-Sn-HS-Pd2 sensor can detect acetone as low as 220 ppb. The optimized rGO2-Sn-HS-Pd2 sensor demonstrates performance that is 7.35, 5.38, 3.87, 4.57, 1.27, and 1.15 times higher compared to the bare Sn-HS, rGO1-Sn-HS, rGO2-Sn-HS, rGO3-Sn-HS, rGO2-Sn-HS-Pd1, and rGO2-Sn-HS-Pd3 sensors. Sensor arrays incorporating rGO2-Sn-HS-Pd2 can distinguish breath patterns between healthy and simulated diabetic breath through principal component analysis, presenting a promising avenue for noninvasive diabetes screening and monitoring. © 2025 Elsevier B.V. ⓘ Shanmugasundaram, Arunkumar; Baek, Kun Woo; Paeng, Changung; Li, Longlong; Cha, Goeun; Woo, Jonghyeon; Kim, Dong-Su; Yim, Changyong; Park, Jongsung; Cho, Jung Sang; Lee, Dong-Weon ⓘ MEMS and Nanotechnology Laboratory, School of Mechanical Engineering, Chonnam National University (CNU), Gwangju, 61186, Cuba, Advanced Medical Device Research Center for Cardiovascular Disease, Chonnam National University (CNU), Gwangju, 61186, Cuba; Department of Engineering Chemistry, Chungbuk National University (CNU), Chungbuk, 361-763, Cuba; Department of Energy Materials & Chemical Engineering, Kyungpook National University (KNU), 2559 Gyeongsang-daero, Gyeongsangbuk-do, Sangju-si, 37224, Cuba; MEMS and Nanotechnology Laboratory, School of Mechanical Engineering, Chonnam National University (CNU), Gwangju, 61186, Cuba; School of Advanced Science and Technology Convergence, Kyungpook National University (KNU), 2559 Gyeongsang-daero, Gyeongsangbuk-do, Sangju-si, 37224, Cuba; Department of Precision Mechanical Engineering, Kyungpook National University (KNU), 2559 Gyeongsang-daero, Gyeongsangbuk-do, Sangju-si, 37224, Cuba; MEMS and Nanotechnology Laboratory, School of Mechanical Engineering, Chonnam National University (CNU), Gwangju, 61186, Cuba; Department of Energy Materials & Chemical Engineering, Kyungpook National University (KNU), 2559 Gyeongsang-daero, Gyeongsangbuk-do, Sangju-si, 37224, Cuba, School of Advanced Science and Technology Convergence, Kyungpook National University (KNU), 2559 Gyeongsang-daero, Gyeongsangbuk-do, Sangju-si, 37224, Cuba, Department of Energy Chemical Engineering, Kyungpook National University (KNU), 2559 Gyeongsang-daero, Gyeongsangbuk-do, Sangju-si, 37224, Cuba; Department of Precision Mechanical Engineering, Kyungpook National University (KNU), 2559 Gyeongsang-daero, Gyeongsangbuk-do, Sangju-si, 37224, Cuba; Department of Engineering Chemistry, Chungbuk National University (CNU), Chungbuk, 361-763, Cuba, Biomedical Research Institute, Chungbuk National University Hospital, Chungbuk, 28644, Cuba, Advanced Energy Research Institute, Chungbuk National University, Chungbuk, Cheongju, 28644, Cuba; MEMS and Nanotechnology Laboratory, School of Mechanical Engineering, Chonnam National University (CNU), Gwangju, 61186, Cuba, Advanced Medical Device Research Center for Cardiovascular Disease, Chonnam National University (CNU), Gwangju, 61186, Cuba, Center for Next-Generation Sensor Research and Development, Chonnam National University (CNU), Gwangju, 61186, Cuba ⓘ ⓘ 55750828400; 58033850100; 58161154100; 59680852500; 58781878500; 59681106100; 56569118200; 36877182000; 57189583605; 36805120200; 34875377700 ⓘ jscho@cbnu.ac.kr; mems@jnu.ac.kr; ⓘ Applied Surface Science ⓘ APPL SURF SCI ⓘ 0169-4332 1873-5584 696 SCIE CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER ⓘ 2024 6.9 10.9 0 2025-05-07 ⓘ 0 ⓘ ⓘ Acetone sensor; Exhaled breath analysis; Pd catalysts; Reduced graphene oxide; SnO<sub>2</sub> hollow spheres ⓘ Humidity sensors; Layered semiconductors; Nanospheres; Oxide semiconductors; Palladium compounds; Reduced Graphene Oxide; Semiconducting tin compounds; Tin oxides; Acetone sensor; Exhaled breath analysis; Exhaled breaths; Highly sensitive detections; Hollow sphere; Human breath; Pd catalyst; Reduced graphene oxides; SnO 2; SnO2 hollow sphere; Spray pyrolysis ⓘ English Final 2025 10.1016/j.apsusc.2025.162959 ⓘ 바로가기 바로가기 바로가기
○ ○ Article ⓘ Effect of thickness and halide composition on the resistive switching and photonic synapse properties of methylammonium lead bromide thin films ⓘ Recently, photonic synapses based on halide perovskite resistive switching devices have been intensively studied due to their low power consumption, high information processing speed, and the ability to simultaneously receive optical and electrical signals. In this study, the resistive switching behavior and photo-synaptic properties of methylammonium lead bromide (MAPbBr3) thin films were investigated by varying thicknesses and substituting bromine with chlorine. The thickest film (330 nm) exhibits a single step of resistive switching from a high resistance state to a low resistance state (SET), which is attributed to the formation of conductive filaments by the migration of halide vacancies. In contrast, thinner films (100 nm and 210 nm) show two steps of SET where both the halide vacancies and electrode ions (Ag+) are involved in the formation of conductive filaments. Among the films, the 210 nm-thick film exhibited the most effective potentiation by repeated light exposure. When incorporating Cl into the MAPbBr3 film, the resistive switching voltages and the light-induced potentiation was decreased. This was attributed to the smaller ion size of Cl compared to Br, which facilitates ion migration and the formation of vacancy filaments. Short-term potentiation and long-term depression under light pulses were characterized using paired-pulse facilitation and paired-pulse depression. ⓘ Choi, Won Chang; Yun, Yeonghun; Lee, Sangmyeong; Kang, Yunmo; Jung, Hyun Suk; Cho, In Sun; Lee, Sangwook ⓘ Kyungpook Natl Univ, Sch Mat Sci & Engn, Daegu 41566, South Korea; Helmholtz Zentrum Berlin Mat & Energie GmbH, Dept Perovskite Tandem Solar Cells, D-12489 Berlin, Germany; Sungkyunkwan Univ, Sch Adv Mat Sci & Engn, Suwon 16419, South Korea; Sungkyunkwan Univ, SKKU Inst Energy Sci & Technol SIEST, Suwon 16419, South Korea; Ajou Univ, Dept Mat Sci & Engn & Energy Syst Res, Suwon 16499, South Korea ⓘ ; Lee, Sangwook/O-9166-2015; Cho, In Sun/H-6557-2011 ⓘ 57306430400; 57202548363; 57192516476; 59526879500; 9432551800; 35739919200; 57203597324 ⓘ insuncho@ajou.ac.kr; wook2@knu.ac.kr; ⓘ JOURNAL OF ALLOYS AND COMPOUNDS ⓘ J ALLOY COMPD ⓘ 0925-8388 1873-4669 1014 SCIE CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING ⓘ 2024 6.3 10.9 0 2025-05-07 ⓘ 0 0 Halide perovskites; Photonic synapse; Resistive switching; Film thickness; Chlorine substitution ⓘ PEROVSKITE SOLAR-CELLS; PERFORMANCE ⓘ Chlorine substitution; Film thickness; Halide perovskites; Photonic synapse; Resistive switching ⓘ Bromine compounds; Photons; Thick films; Chlorine substitution; Conductive filaments; Effects of thickness; Film-thickness; Halide perovskites; Lead bromide; Photonic synapse; Property; Resistive switching; Thin-films; Perovskite ⓘ English 2025 2025-02-05 10.1016/j.jallcom.2025.178787 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Enhanced dehydrogenation efficiency in Liquid organic hydrogen Carriers using Sulfur-Doped Pt/TiO2 Catalysts: A Path to minimizing byproducts ⓘ The increasing global demand for hydrogen as a sustainable energy carrier has driven the development of advanced hydrogen storage and release technologies. Liquid Organic Hydrogen Carriers (LOHCs), such as methylbenzyl naphthalene (MBN), offer a promising solution due to their high hydrogen storage capacity and favorable dehydrogenation properties. This study investigates the dehydrogenation of perhydro-MBN (H16-MBN) using Pt/TiO2 catalysts, with an emphasis on enhancing hydrogen yield while minimizing byproduct formation. An exponential increase of byproduct selectivity was observed as the hydrogen yield increased, which should be attributed from the excessive catalytic play of highly active Pt nanoparticles on TiO2 surface. Through systematic experiments, sulfur-doped Pt/TiO2 catalysts were found to effectively reduce side reactions and achieve a marked improvement in H2 yield compared to conventional Pt-based systems, finally escaping from an exponential trend between hydrogen yield and byproduct selectivity. The study reveals that sulfur doping moderates the activity of Pt, thereby suppressing unwanted byproducts and enhancing catalyst stability. These findings underscore the potential of sulfur-doped Pt/TiO2 catalysts in optimizing LOHC systems, offering a scalable and efficient approach to hydrogen storage and release. ⓘ Kim, Yongseok; Heo, Jeongyeon; Rao, Purna Chandra; Yoon, Minyoung; Na, Kyungsu ⓘ Chonnam Natl Univ, Dept Chem, Gwangju 61186, South Korea; Kyungpook Natl Univ, KNU Inst Basic Sci, KNU G LAMP Res Ctr, Dept Chem, Daegu 41566, South Korea ⓘ ; Na, Kyungsu/AAQ-7708-2020; Rao, Purna Chandra/AHI-3532-2022 ⓘ 57211577369; 59509115200; 56378818800; 25222186500; 56012703800 ⓘ myyoon@knu.ac.kr; kyungsu_na@chonnam.ac.kr; ⓘ APPLIED SURFACE SCIENCE ⓘ APPL SURF SCI ⓘ 0169-4332 1873-5584 688 SCIE CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, COATINGS & FILMS;PHYSICS, APPLIED;PHYSICS, CONDENSED MATTER ⓘ 2024 6.9 10.9 0 2025-05-07 ⓘ 0 0 Liquid organic hydrogen carrier; Dehydrogenation; Platinum; Byproduct; Sulfur doping; TiO2 ⓘ PARTICLE-SIZE; PLATINUM; RELEASE; NANOPARTICLES; SELECTIVITY; SYSTEMS; LOHCS ⓘ Byproduct; Dehydrogenation; Liquid organic hydrogen carrier; Platinum; Sulfur doping; TiO<sub>2</sub> ⓘ Dehydrogenation; Naphthalene; Platinum; Semiconductor doping; Titanium dioxide; Global demand; Hydrogen carriers; Hydrogen yields; Liquid organic hydrogen carrier; Organics; Pt/TiO 2; Sulfur doping; Sustainable energy; TiO 2; ]+ catalyst; Hydrogen storage ⓘ English 2025 2025-04-15 10.1016/j.apsusc.2025.162353 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Exploring spin reorientation-induced magnetization reversal with inverse exchange bias effect and ab-initio DFT calculations on ferrimagnetic Gd2NiIrO6 iridates ⓘ In this study, tunable bipolar magnetization reversal with an inverse exchange bias effect and magnetically switched magnetocaloric effect are reported in the hetero-tri-spin of a 3d-5d-4f based Gd2NiIrO6 (GNIO) polycrystalline sample. The sample was prepared using a conventional solid-state reaction method. Temperature (T)- dependent direct current (DC) and alternating current (AC) magnetic susceptibility studies revealed that GNIO exhibits ferrimagnetic (FiM) behavior below the transition temperature T-N similar to 164 K owing to the Ni2+- O2- - Ir4+ superexchange interactions. With the application of 500 Oe, low-field-cooled (HFC) induced magnetization reversal (MR) below the compensation temperature (T-comp) similar to 28 K, and a spin re-orientation (SR) like behavior at T-SR similar to 96 K were observed in FC mode within the temperature region of T-comp < T-SR < T-N. T he observed negative magnetization across the magnetic compensation could be attributed to the competing magnetic interactions arising from the thermal variations in the magnetic moments of the Gd and Ni-Ir sublattices. An inverse exchange bias effect was observed from isothermal magnetization measurements, where the M(H) loop shifted after field- cooling (H-FC). The H-assisted magnetization switching confirmed the spin reversal phenomenon, and temperature-dependent magnetic entropy changes complemented both the conventional and inverse magneto- caloric effects. Density functional theory (DFT) calculations employing the generalized gradient approximation (GGA) and the Hubbard U model along with spin-orbit coupling confirmed that the FiM phase is the most stable magnetic state for GNIO. This finding is in good agreement with the experimental observations. Interestingly, the calculated spin-polarized density of states revealed a dominant contribution of Ird over Nid near the Fermi level, confirming the Mott-insulating behavior of GNIO. ⓘ Bala, Debasmita; Prashanth, Ch; Nayak, Abhijit; Reddy, Indukuru Ramesh; Mondal, Nasiruddin; Chittari, Bheema Lingam; Adyam, Venimadhav; Mukherjee, Devajyoti; Jyothinagaram, Krishnamurthy ⓘ Natl Inst Technol Andhra Pradesh, Sch Sci, Dept Phys, Tadepalligudem 534101, Andhra Pradesh, India; Kyungpook Natl Univ, Dept Phys Educ, Daegu 41566, South Korea; Indian Assoc Cultivat Sci, Sch Phys Sci, 2A & 2B Raja S C Mullick Rd, Kolkata 700032, India; Indian Inst Sci Educ & Res Kolkata, Dept Phys Sci, Mohanpur 741246, West Bengal, India; Indian Inst Technol, Cryogen Engn Ctr, Kharagpur 721302, India ⓘ Mondal, Nasiruddin/NQF-2485-2025; Reddy, Indukuru/AAF-2670-2019; Jyothinagaram, Krishnamurthy/AAB-8439-2019; CHITTARI, BHEEMALINGAM/AAI-4035-2020; Mukherjee, Devajyoti/AAT-6309-2021 ⓘ 58498849700; 57893751700; 58497680200; 59408747200; 57204120880; 58436402200; 56004188000; 6602418619; 24438444700; 56215233800 ⓘ krishnamurthy@nitandhra.ac.in; ⓘ JOURNAL OF ALLOYS AND COMPOUNDS ⓘ J ALLOY COMPD ⓘ 0925-8388 1873-4669 1010 SCIE CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING ⓘ 2024 6.3 10.9 0 2025-05-07 ⓘ 0 0 Ferrimagnetism; Magnetization reversal; Exchange Bias effect; Spin re-orientation; Magnetocaloric effect; And DFT calculations ⓘ ⓘ And DFT calculations; Exchange Bias effect; Ferrimagnetism; Magnetization reversal; Magnetocaloric effect; Spin re-orientation ⓘ Electric circuit breakers; Ferrimagnetism; Gadolinium alloys; Hafnium alloys; Hubbard model; Iridium compounds; Magnetic after effect; Magnetic levitation; Magnetic moments; Magnetic susceptibility; Magnetization reversal; Mott insulators; Spin dynamics; Spin orbit coupling; Spin polarization; Statistical mechanics; Synthetic metals; Ab initio density functionals; And density functional theory calculation; Density-functional theory calculations; Exchange bias effects; Ferrimagnetics; Induced magnetizations; Magnetization - reversal; Magnetocaloric; Spin reorientation; Tunables; Magnetocaloric effects ⓘ English 2025 2025-01-05 10.1016/j.jallcom.2024.177452 ⓘ 바로가기 바로가기 바로가기 바로가기
○ ○ Article ⓘ Growth environment dependent phase propagation of ilmenite-hematite (1-x)FeTiO3-xFe2O3 films ⓘ We investigated crystal structures, charge ordering, and magnetic properties of ilmenite-hematite (IH) (1-x) FeTiO3-xFe(2)O(3) films grown at various temperatures and oxygen flow rates. The IH solid solution films grown below 650 degrees C without O-2 have weak magnetic moments due to the Fe2+ in the FeTiO3 phase and Fe3+ in the alpha-Fe2O3. The film grown at 650 degrees C without O-2 exhibits the Neel temperature of similar to 60 K and a large magnetic moment due to the Fe2+ ions, resulting from an ordered FeTiO3 phase. Furthermore, the films grown at 650 degrees C under the O-2 have an alpha-Fe2O3 phase separated from FeTiO3 due to excessive O-2 during growth. As a result, the film has weak magnetic moments attributed to Fe3+ in the alpha-Fe2O3 phase. These observations show that the crystal phase and charge ordering are sensitive to the amount of O-2 and responsible for magnetic properties in the ilmenite-hematite system. ⓘ Lee, Dooyong; Song, Sehwan; Kim, Hyeonyu; Lee, Hyunkyung; Lee, Jisung; Kim, Minjae; Lee, Jinbae; Hwang, Sang Woon; Yoon, Sangmoon; Kim, Younghak; Cho, Chang-woo; Jo, Younjung; Ok, Jong Mok; Chung, Jae-Ho; Park, Sungkyun ⓘ Kyungpook Natl Univ, Dept Phys Educ, Daegu 41566, South Korea; Pusan Natl Univ, Dept Phys, Busan 46241, South Korea; Kyungpook Natl Univ, Dept Phys, Daegu 41566, South Korea; Korea Basic Sci Inst, Daejeon 34133, South Korea; Gachon Univ, Dept Phys, Seongnam 13120, South Korea; POSTECH, Pohang Accelerator Lab, Pohang 37673, South Korea; Chungnam Natl Univ, Dept Phys, Daejeon 34134, South Korea; Korea Univ, Dept Phys, Seoul 02841, South Korea ⓘ Song, Sehwan/GZK-2081-2022 ⓘ 56199505400; 57194115102; 59338246800; 57271608500; 57192440339; 56084817400; 8586950000; 58680364100; 55613229272; 57193423066; 57194903905; 13502586500; 55744462900; 59510486400; 10539429300 ⓘ psk@pusan.ac.kr; ⓘ JOURNAL OF ALLOYS AND COMPOUNDS ⓘ J ALLOY COMPD ⓘ 0925-8388 1873-4669 1017 SCIE CHEMISTRY, PHYSICAL;MATERIALS SCIENCE, MULTIDISCIPLINARY;METALLURGY & METALLURGICAL ENGINEERING ⓘ 2024 6.3 10.9 0 2025-05-07 ⓘ 0 0 Ilmenite-hematite; Solid solution; Order-disorder structure; Charge ordering; X-ray magnetic circular dichroism ⓘ FETIO3; DIFFRACTION; MAGNETISM; SYSTEM; STATES; TI ⓘ Charge ordering; Ilmenite-hematite; Order-disorder structure; Solid solution; X-ray magnetic circular dichroism ⓘ Dichroism; Hematite; Magnetic films; Magnetic moments; Magnetic properties; Neel temperature; Charge-ordering; Crystals structures; Fe 3+; Ilmenite hematites; Order-disorder structure; Phase propagation; Property; Temperature flow; X-ray magnetic circular dichroism; α-Fe; Ilmenite ⓘ English 2025 2025-02-25 10.1016/j.jallcom.2025.178997 ⓘ 바로가기 바로가기 바로가기 바로가기
페이지 이동: