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International Conference on Infrared and Millimeter Waves

作者： Dasom Kim Sunghwan Kim Dukhyung Lee Shuang Liang Fuyang Tay Michael J. Manfra Dai-Sik Kim Junichiro Kono Department of Electrical and Computer Engineering Rice University Houston TX USA Applied Physics Graduate Program Smalley-Curl Institute Rice University Houston TX USA Department of Physics Long-wavelength Nanotechnology Laboratory and Quantum Photonics Institute Ulsan National Institute of Science and Technology (UNIST) Ulsan South Korea Department of Physics and Astronomy Purdue University West Lafayette IN USA Birck Nanotechnology Center Purdue University West Lafayette IN USA Elmore Family School of Electrical and Computer Engineering Purdue University West Lafayette IN USA School of Materials Engineering Purdue University West Lafayette IN USA Department of Physics and Astronomy Rice University Houston TX USA Department of Material Science and NanoEngineering Rice University Houston TX USA

We report ultrastrong coupling of the cyclotron resonance of a two-dimensional electron gas in a GaAs quantum well to terahertz cavity photons under extreme confinement to the nanometer scale. This was realized by an array of nano-slots fabricated close to the quantum well layer on the GaAs substrate. Our terahertz magnetospectroscopic measurements revealed two polariton branches as a function of applied magnetic field. While the photon-like part of the two polariton branches was clearly observed, the matter-like part was generally elusive. Our electromagnetic simulations quantitatively reproduce our observation for the upper-polariton branch. However, for the lower-polariton branch, our simulations predict a pronounced resonance, which was absent in experimental spectra. This discrepancy may be a consequence of the breakdown of the dipole approximation in this extreme confinement situation.

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A biomimetic micropillar wound dressing with flavone and polyphenol control release in vitro and in vivo

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Journal of the Taiwan Institute of Chemical Engineers 2024年 160卷

作者： Cheng, Tien-Hsin Lin, Ruei-Hong Cheng, Yu-Shen Shih, Pin-Keng Show, Pau Loke Chen, Hsiao-Yi Nakmee, Pattarawadee Sumthong Chang, Jui-Jen Huang, Dong-Ming Wang, Hui-Min David Department of Chemical and Materials Engineering National Yunlin University of Science and Technology Yunlin Taiwan Graduate Institute of Biomedical Engineering National Chung Hsing University Xingda Rd. South Dist. Taichung402 China Department of Neurological Institute Taichung Veterans General Hospital Taichung China Doctoral Program in Tissue Engineering and Regenerative Medicine National Chung Hsing University Taichung China Department of Surgery China Medical University Hospital Taichung Taiwan School of Medicine China Medical University Taichung Taiwan Department of Chemical Engineering Khalifa University Abu Dhabi United Arab Emirates Faculty of Science at Sriracha Kasetsart University Sriracha Campus 199 Moo 6 Sukhumvit Rd. Chonburi Sriracha20230 Thailand Department of Medical Research China Medical University Hospital China Medical University Taichung China Institute of Biomedical Engineering and Nanomedicine National Health Research Institutes Miaoli County China Regenerative Medicine and Cell Therapy Research Center Graduate Institute of Medicine College of Medicine Kaohsiung Medical University Kaohsiung Taiwan Department of Medical Laboratory Science and Biotechnology China Medical University Taichung China

Background: Wound healing is a complex and dynamic process involving the replacement of devitalized and missing cellular structures and tissue layers. Methods: This study involved developing a drug-loaded biomimetic micropillar wound dressing based upon inspiration from witnessing the adhesive ability in a gecko's footpad. The conformal adhesion was set up by applying a soft elastomer thin film on the developed wound dressing surfaces. The results showed that the developed surfaces prepared based on polydimethylsiloxane (PDMS) had low surface free energy, high chemical stability, and good plasticity. Astaxanthin (AST) and curcumin were applied as the patch's bioactive compounds to help accelerate the wound healing process. Results: The results showed that the developed surfaces prepared based on polydimethylsiloxane (PDMS) had low surface free energy, high chemical stability, and good plasticity. Astaxanthin (AST) and curcumin were applied as the patch's bioactive compounds to help accelerate the wound healing process. The results indicate that the developed biomimetic micropillar patches could release the loaded drugs and significantly increase cell viability and collagen content to 20 % ∼ 25 % in vitro and in vivo. Conclusion: In summation, the primary purpose of this study has been to design a novel encapsulated carrier (micropillar patch) for use in adjustable drug release, while combining with the biomimetic microstructure to reach wound healing through percutaneous absorption. © 2024 Taiwan Institute of Chemical Engineers

关键词： Chemical stability

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Assessment of circulating extracellular vesicles from calorie-restricted mice and humans in ischaemic injury models

Journal of Extracellular Biology

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Journal of Extracellular Biology 2023年第5期2卷 e86页

作者： Jaimes, Manuel S. V. Liao, Chia-Te Chen, Max M. Czosseck, Andreas Lee, Tsung-Lin Chou, Yu-Hsiang Chen, Yung-Ming Lin, Shuei-Liong Lai, James J. Lundy, David J. Graduate Institute of Biomedical Materials & Tissue Engineering Taipei Medical University Taipei Taiwan Division of Nephrology Department of Internal Medicine Shuang Ho Hospital Taipei Medical University New Taipei Taiwan Division of Nephrology Department of Internal Medicine School of Medicine College of Medicine Taipei Medical University Taipei Taiwan TMU Research Center of Urology and Kidney (TMU-RCUK) Taipei Medical University Taipei Taiwan Division of Nephrology Department of Internal Medicine National Taiwan University Hospital College of Medicine National Taiwan University Taipei Taiwan Graduate Institute of Physiology College of Medicine National Taiwan University Taipei Taiwan Department of Bioengineering University of Washington Seattle WA United States Department of Materials Science and Engineering National Taiwan University of Science and Technology Taipei Taiwan International PhD Program in Biomedical Engineering Taipei Medical University Taipei Taiwan Center for Cell Therapy Taipei Medical University Hospital Taipei Taiwan

Calorie restriction (CR) and fasting affect lifespan, disease susceptibility and response to acute injury across multiple animal models, including ischaemic injuries such as myocardial infarction or kidney hypoxia. The cargo and function of circulating extracellular vesicles (EV) respond to changes in host physiology, including exercise, injury, and other interventions. Thus, we hypothesised that EVs induced following CR may reflect some of the beneficial properties of CR itself. In a pilot study, EVs were isolated from mice following 21 days of 30 % CR, and from eight human donors after 72 h water-only fasting. EV size, concentration and morphology were profiled by NTA, western blot and cryoEM, and their function was assessed using multiple assays related to ischaemic diseases. We found that EVs from post-fasting samples better protected cardiac cells from hypoxia/reperfusion (H/R) injury compared to pre-fasting EVs. However, there was no difference when used to treat H/R-injured kidney epithelial cells. post-fasting derived EVs slowed the rate of fibroblast migration and slightly reduced macrophage inflammatory gene expression compared to pre-fasting derived EVs. Lastly, we compared miRNA cargos of pre- and post-fasting human serum EVs and found significant changes in a small number of miRNAs. We conclude that fasting appears to influence EV cargo and function, with varied effects worthy of further exploration. © 2023 The Authors. Journal of Extracellular Biology published by Wiley Periodicals, LLC on behalf of the International Society for Extracellular Vesicles.

关键词： calorie restriction cardiomyocyte diet extracellular vesicle fasting hypoxia ketone macrophage microRNA serum

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Unraveling the Cr 2 N Precipitation and Its Negative Effect on the Corrosion Resistance of Friction Stir Welded UNS S32760 Super Duplex Stainless Steel

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Surfaces and Interfaces 2025年 71卷

作者： G.S. Vacchi W.S. de Carvalho C.P. Meinhardt L.A. Bergmann S.T. Amancio-Filho C.A.D. Rovere Munir Rachid Corrosion Laboratory Department of Materials Engineering Federal University of São Carlos Rodovia Washington Luis Km 235 São Carlos SP 13565-905 Brazil Graduate Program in Materials Science and Engineering Federal University of São Carlos Brazil Institute of Materials Science Joining and Forming BMK Endowed Professorship for Aviation Graz University of Technology – TU Graz Kopernikusgasse 24/1 Graz 8010 Austria Department of Mechanical Engineering Federal University of Pampa Avenida Tiarajú 810 Alegrete RS Brazil Helmholtz-Zentrum Hereon Institute of Materials Mechanics Solid State Materials Processing Max-Planck-Straße 1 Geesthacht Germany

The root surface of a friction stir welded super duplex stainless steel (UNS S32760) was thoroughly characterized in this study. The findings revealed a refined grain structure and a conspicuous increase of 50 HV 0.3 in the Root’s hardness. Interestingly, the volume fraction of the ferrite phase remained largely unchanged. Rapid cooling in the welding process led to the Cr 2 N precipitation at the ferrite/ferrite grain boundaries in the root area, significantly increasing sensitization, reducing localized corrosion resistance under high electrode potentials in a neutral pH saline environment, and adversely affecting root passivity in a hydrochloric acid environment compared to the base metal.

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Diversification of the Carbodicarbene Class by Embedding an Anionic Component in its Scaffold

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Chemistry - A European Journal 2023年第71期29卷 e202302886页

作者： Yu, Cheng-Han Au-Yeung, Ka-Chun Liu, Ruiqin Lee, Chao-Hsien Jiang, Dandan Semagne Aweke, Bamlaku Wu, Chia-Hung Wang, Yu-Jou Wang, Ting-Hsuan Voon Kong, Kien Yap, Glenn P. A. Chen, Wen-Ching Frenking, Gernot Zhao, Lili Ong, Tiow-Gan Institute of chemistry Academia Sinica Taipei115201 Taiwan School of Chemistry and Molecular Engineering State Key Laboratory of Materials-Oriented Chemical Engineering Nanjing Tech University Nanjing China Fachbereich Chemie Philipps-Universität Marburg Hans-Meerwein-Strasse MarburgD-35043 Germany Department of Chemistry and Biochemistry University of Delaware NewarkDE United States Department of Chemistry National Taiwan University Taipei Taiwan Department of Applied Chemistry National Yang Ming Chiao Tung University Hsinchu Taiwan Sustainable Chemical Science and Technology Taiwan International Graduate Program Academia Sinica Taipei Taiwan Corporate R&D Center LCY Chemical Corporation Kaohsiung Taiwan Department of Medicinal and Applied Chemistry Kaohsiung Medical University Kaohsiung Taiwan

Carbodicarbene (CDC) has become an emerging ligand in many fields due to its strong σ-donating ability. 2- moiety within the framework to leverage the electronic feature of carbon carbone. The elucidation of X-ray crystal structures, ligand competition as well as transmetallation experiments suggest that the anionic moiety has enhanced the overall donor strength of the traditional neutral CDC. Importantly, this anionic scaffold exhibits a facile second coordination toward Au(I), Ag(I) and Pd(II) without any external ligand assistance, whereas previously reported neutral pincer CDC complexes do not possess a two-fold donor capacity. The analysis of the bonding situation via theoretical methods shows that the description of the anionic CDC moieties in terms of dative bonding is preferred over the model of delocalized positive charge, as it accounts for the two-fold donor ability of the divalent carbon atom, preserving a characteristic feature of a carbone. © 2023 Wiley-VCH GmbH.

关键词： Scaffolds

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Bioethanol Production from Microalgae Biomass at High Solid Loadings

SSRN

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SSRN 2022年

作者： Condor, Billriz E. de Luna, Mark Daniel G. Chang, Yu-Han Chen, Jih-Heng Leong, Yoong Kit Chen, Po-Ting Chen, Chun-Yen Lee, Duu-Jong Chang, Jo-Shu Energy Engineering Program National Graduate School of Engineering University of the Philippines Diliman Quezon City1101 Philippines Department of Chemical Engineering College of Engineering University of the Philippines Diliman Quezon City 1101 Philippines Department of Chemical Engineering National Cheng Kung University Tainan701 Taiwan Research Center for Smart Sustainable Circular Economy Tunghai University Taichung Taiwan Department of Chemical and Materials Engineering Tunghai University Taichung Taiwan Department of Biotechnology and Food Technology Southern Taiwan University of Science and Technology Tainan71005 Taiwan University Center for Bioscience and Biotechnology National Cheng Kung University Tainan701 Taiwan Department of Mechanical Engineering City University of Hong Kong Kowloon Tang Hong Kong Department of Chemical Engineering and Materials Science Yuan Ze University Chung-Li32003 Taiwan

Industrial adoption of microalgae biofuel technology has always been hindered by its economic viability. To increase the feasibility of bioethanol production from microalgae, fermentation was applied to Chlorella vulgaris FSP-E biomass at high-solid-loading conditions. First, Chlorella vulgaris FSP-E was cultivated to produce microalgae biomass with high carbohydrate content. Next, different ethanol-producing microorganisms were screened. Saccharomyces cerevisiae FAY-1 showed no inhibition when fermenting high initial glucose concentrations and was selected for the fermentation experiments at high solids loading. Optimization of acid hydrolysis at high biomass loading was also performed. The fermentation of microalgal biomass hydrolysate produced a final ethanol concentration and yield higher than most reported literature using microalgae feedstock. In addition, the kinetics of bioethanol fermentation of microalgae hydrolysate under high solid loading were evaluated. These results show the potential of fermenting microalgae biomass at high solids loading in improving the viability of microalgae bioethanol production. © 2022, The Authors. All rights reserved.

关键词： Microalgae

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Detachable Microneedles With Crosslinked Hyaluronic Acid as Superficial Skin Filler

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Journal of Biomedical materials Research - Part A 2025年第6期113卷 e37933页

作者： Toprangkobsin, Pattrawadee Teepakakorn, Apasinee Ampawa, Supanan Efendi, Ahmad Limcharoen, Benchaphorn Banlunara, Wijit Asawanonda, Pravit Wanichwecharungruang, Supason Department of Chemistry Faculty of Science and Technology Phra Nakhon Si Ayutthaya Rajabhat University Ayutthaya Thailand Department of Chemistry Faculty of Science Chulalongkorn University Bangkok Thailand Mineed Technology Co. Ltd. Bangkok Thailand Interdisciplinary Program of Nanoscience and Technology Graduate School Chulalongkorn University Bangkok Thailand Department of Anatomy Faculty of Veterinary Science Chulalongkorn University Bangkok Thailand Center of Excellence in Materials and Bio-Interfaces Chulalongkorn University Bangkok Thailand Department of Pathology Faculty of Veterinary Science Chulalongkorn University Bangkok Thailand Department of Medicine Division of Dermatology Faculty of Medicine Chulalongkorn University Bangkok Thailand

Crosslinking gives hyaluronic acid (HA) the ability to resist digestion by hyaluronidase;thus, crosslinked hyaluronic acid (cHA) is currently the most popular soft tissue filler. Clinically trained physicians usually administer cHA to the desired site via injections. Injection into the upper dermis and epidermis layers of the skin is challenging, and cHA with a low level of crosslinking is employed to prevent the uneven look, but it comes with a shorter lifetime. We demonstrate here the synthesis of cHA and its simultaneous fabrication into cHA-detachable microneedles (cHA-DDMNs). The cHA-DDMN patch allowed for the deposition of cHA into the ex vivo porcine skin in 1 min. The non-crosslinked HA placed into the ex vivo porcine skin spread out evenly within 30 min after it was applied. In contrast, the deposited cHA demonstrated prolonged localization in the tissue. Furthermore, we demonstrated the sustained release of curcumin delivered by cHA both in vitro and ex vivo. In rats, the administration of cHA-DDMNs to the skin did not cause skin irritation and led to a significant increase in dermal thickness and collagen deposition. © 2025 Wiley Periodicals LLC.

关键词： Crosslinking

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Tailoring the Microstructure of a Cu-0.7cr-0.07zr Alloy Submitted to Ecap at Cryogenic Temperature for Improved Thermal Stability

SSRN

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SSRN 2022年

作者： Oliveira, Pedro H.F. Magalhães, Danielle Cristina Camilo Unti, Luiz Fernando K. Cintho, O.M. Kliauga, Andrea M. Sordi, Vitor Luiz Federal University of São Carlos Graduate Program in Materials Science and Engineering Rod. Washington Luís km 235 São Carlos SP CEP 13565-905 Brazil Federal University of São Carlos Department of Materials Engineering Rod. Washington Luís km 235 São Carlos SP CEP 13565-905 Brazil Department of Mechanical Engineering Aeronautics Institute of Technology Praça Marechal Eduardo Gomes 50 SP São José dos CamposCEP 12228-900 Brazil Department of Materials Engineering State University of Ponta Grossa Av. General Carlos Cavalcanti PR Ponta GrossaCEP 84030-900 Brazil

Severe Plastic Deformation (SPD) routes, such as Equal Channel Angular Pressing (ECAP), are capable of producing ultrafine-grained (UFG) materials with outstanding mechanical properties. Although grain refinement and the increase in mechanical processing could be enhanced through ECAP processing at cryogenic temperatures, this route presents the drawback of microstructural instability, which is responsible for reversing the gain in mechanical properties and microstructural refinement when the material is stored at room temperature or submitted to relatively high temperatures. Aiming to design severely deformed and stable microstructures, this study investigated pure copper (Cu) and a commercial ITER-grade Cu-0.7Cr-0.07Zr alloy submitted to ECAP at 298 and 123 K followed by annealing heat treatments. ECAP processing introduced a high density of dislocations and vacancy concentration in the materials assessed. Pure Cu showed poor microstructural stability when long-term stored at room temperature after ECAP processing at cryogenic temperatures, and when submitted to annealing post-ECAP processing. In contrast, the Cu-0.7Cr-0.07Zr alloy submitted to cryo-ECAP showed outstanding thermal stability even when submitted to annealing at 673 K for 120 min. For this alloy, the fine Cr-rich precipitates were responsible for preventing static recovery and preserving a grain size of ~6.6 μm and an area fraction of recrystallized grains of 6.2%. Finally, it was possible to pave the way for the design of refined and stable microstructures after cryo-SPD processing. © 2022, The Authors. All rights reserved.

关键词： Equal channel angular pressing

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Titania Nanosheets Generates Peroxynitrite for S-Nitrosylation and Enhanced p53 Function in Lung Cancer Cells

Research Square

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Research Square 2021年

作者： Soonnarong, Rapeepun Tungsukruthai, Sucharat Nutho, Bodee Rungrotmongkol, Thanyada Vinayanuwattikun, Chanida Maluangnont, Tosapol Chanvorachote, Pithi Interdisciplinary Program of Pharmacology Graduate School Chulalongkorn University Bangkok Thailand Cell-based Drug and Health Products Development Research Unit Chulalongkorn University Bangkok Thailand Departments of Pharmacology and Physiology Faculty of Pharmaceutical Sciences Bangkok Thailand Department of Pharmacology Faculty of Science Mahidol University Bangkok Thailand Biocatalyst and Environmental Biotechnology Reseach Unit Department of Biochemistry Faculty of Science Chulalongkorn University Bangkok Thailand Program in Bioinformatics and Computational Biology Graduate School Chulalongkorn University Bangkok Thailand Division of Medical Oncology Department of Medicine Chulalongkorn University Bangkok Thailand College of Materials Innovation and Technology King Mongkut’s Institute of Technology Ladkrabang Bangkok Thailand

Background: Metal oxide nanomaterials are increasingly being exploited in cancer therapy thanks to their unique properties, which can enhance the efficacy of current cancer therapies. However, the nanotoxicity and mechanism of Ti0.8O2 nanosheets for specific site-targeting strategies in NSCLC have not yet been investigated. Methods: The effects of Ti0.8O2 nanosheets on cytotoxicity in NSCLC cells and normal cells were examined. The apoptosis characteristics, including condensed and fragmented nuclei, as assessed by positive staining with annexin V. The cellular uptake of the nanosheets and the induction of stress fiber were assessed via transmission electron microscopy (TEM) and scanning electron microscopy (SEM) analyses, respectively. We also evaluated the expression of protein in death mechanism to identify the molecular mechanisms behind the toxicity of these cells. We investigated the relationship between S-nitrosylation and the increase in p53 stability by molecular dynamics. Results: Ti0.8O2 nanosheets caused cytotoxicity in several lung cancer cells, but not in normal cells. The nanosheets could enter lung cancer cells and exert an apoptosis induction. Results for protein analysis further indicated the activation of p53, increased Bax, decreased Bcl-2 and Mcl-1, and activation of caspase-3. The nanosheets also exhibited a substantial apoptosis effect in drug-resistant metastatic primary lung cancer cells, and it was found that the potency of the nanosheets was dramatically higher than that of cisplatin and etoposide. In terms of their mechanism of action, we found that the mode of apoptosis induction was through the generation of cellular ONOO− mediated the S-nitrosylation of p53 at C182. Molecular dynamics analysis further showed that the S-nitrosylation of one C182 stabilized the p53 dimer. Consequently, this nitrosylation of the protein led to an upregulation of p53 through its stabilization. Conclusions: Taking all the evidence together, we provided info

关键词： Molecular dynamics

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Investigation of TiO₂ doped with nitrogen and vanadium using hydrothermal/Sol-Gel method and its application for dyes photodegradation

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Arab Journal of Basic and Applied sciences 2019年第1期26卷 242-253页

作者： Mahendra, I. Putu Huda, Adri Ngoc, Ha Minh Nghia, Phan Trung Tamrin, Tamrin Wirjosentono, Basuki Department of Chemistry Faculty of Mathematics and Natural Sciences University of Sumatera Utara Medan Indonesia Department of Environmental Science Graduate Program Sriwijaya University Palembang Indonesia Key Laboratory of Advanced Materials for Green Growth VNU University of Science Vietnam National University Hanoi Viet Nam Center for Rubber Science and Technology Hanoi University Science and Technology Hanoi Viet Nam

The doping process of TiO2 using a combination method, sol-gel and hydrothermal, has been conducted. The presence of anatase and rutile phase of TiO2 and doped TiO2 has been confirmed using UV-DRS, XRD, Raman spectros... 详细信息

The doping process of TiO₂ using a combination method, sol-gel and hydrothermal, has been conducted. The presence of anatase and rutile phase of TiO₂ and doped TiO₂ has been confirmed using UV-DRS, XRD, Raman spectroscopy, and EPR. The Nitrogen-doped TiO₂ (N-TiO₂) showed the highest photoactivity in the powder form than the as-prepared TiO₂ (rutile), anatase and Vanadium-doped TiO₂ (V-TiO₂). The influence of pH during the preparation of N-TiO₂ showed that pH gives a big effect to the morphology and photoactivity of the photocatalyst. The N-TiO₂ at pH 2 showed higher photoactivity than N-TiO₂ at pH 4 and it also showed a fine morphology. The N-TiO₂ also showed the highest photoactivity when it was immobilized in the DPNR matrix. After being immobilized, the photoactivity of the as-prepared photocatalyst was decreased to be 0–30%. © 2019, © 2019 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group on behalf of the University of Bahrain.

关键词： deproteinized natural rubber/TiO2 composites dyes photodegradation N-doped TiO2 photocatalytic

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