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Anti-inflammatory, antibacterial, and antioxidative bioactive glass-based nanofibrous dressing enables scarless wound healing

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Smart materials in Medicine 2023年第1期4卷 407-426页

作者： Yuan, Zhengchao Zhang, Lixiang Jiang, Shichao Shafiq, Muhammad Cai, Youjun Chen, Yujie Song, Jiahui Yu, Xiao Ijima, Hiroyuki Xu, Yuan Mo, Xiumei State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine College of Biological Science and Medical Engineering Donghua University Shanghai201620 China Department of Orthopaedics Xinqiao Hospital Army Military Medical University No. 183 Xinqiao Street Shapingba District Chongqing400037 China Department of Orthopedics Shandong Provincial Hospital Affiliated to Shandong First Medical University Jinan250021 China Medical Science and Technology Innovation Center Shandong First Medical University & Shandong Academy of Medical Sciences Jinan250117 China Department of Chemical Engineering Faculty of Engineering Graduate School Kyushu University 744 Motooka Nishi-ku Fukuoka-shi Fukuoka819-0395 Japan Lahore54000 Pakistan

Excessive scar tissue formation along with bacterial infection, hemorrhage, and oxidative wound microenvironment pose adverse physiological and psychological effects on patients, which necessitate the advent of innovative anti-inflammatory, anti-bacterial, and anti-oxidative multifunctional wound dressings. The overarching objective of this study was to exploit bioactive glass (BG) and a natural anti-bacterial component namely "oregano essential oil (OEO)" to impart multifunctionality to poly(L-lactide-co-glycolide)/Gelatin (PLGA/Gel)-based nanofibrous dressings for excisional wound management. We performed a series of structural, morphological, and release studies as well as delineated angiogenic, hemostatic, anti-bacterial, and anti-oxidative properties of these bioactive dressings in vitro, which altogether revealed the beneficial effects of BG and OEO in terms of rapid hemostasis, improved chemotactic response, diminished bacterial colonization, and anti-inflammatory response. Impressively, in multiple injury models, including a rat tail-amputation model, an ear artery injury model, and a liver trauma model in rabbit in vivo, we reported BG-mediated rapid hemostasis. Moreover, dressings containing BG showed improved hemocompatibility and suppressed coagulation as revealed by activated partial thromboplastin assay (APTT) in vitro. In addition, the transplantation of these nanofibrous dressings in a full-thickness excisional wound model in rats showed significant tissue regeneration as evidenced by the more number of blood vessels, glands, and hair follicles, re-epithelialization, diminished inflammatory response, and less fibrotic tissue formation. Taken together our approach of simultaneously harnessing economical BG and OEO to enable multifunctionality to nanofibrous dressings for tissue repair may hold great promise for wound healing as well as other bio-related disciplines. © 2023 The Authors

关键词： Biocompatibility

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Nano-Sized Polyethylene Particles Produced by Nano-Second UV Laser Ablation

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Lasers in Manufacturing and materials Processing 2023年第3期10卷 389-399页

作者： Kanehara, Ikuna Yamashita, Hiromasa Fujii, Sho Kimura, Tsuyoshi Yamamoto, Masaya Tanabe, Tadao Department of Engineering and Design Shibaura Institute of Technology 3-7-5 Toyosu Tokyo Koto-ku1358548 Japan Department of Natural Science Kisarazu National College of Technology 2-11-1 Kiyomidai Higashi Chiba Kisarazu2920041 Japan Institute of Biomaterials and Bioengineering Tokyo Medical and Dental University 2-3-10 Kanda-Surugadai Tokyo Chiyoda-ku101-0062 Japan Department of Materials Processing Graduate School of Engineering Tohoku University 6-6-02 Aramaki-Aza Aoba Aoba-ku Sendai980-8579 Japan

Model samples of nano-sized crystalline plastics (NPs), which are useful for the study of interactions with biological systems and toxicity studies, were artificially prepared by laser ablation. Nano-sized particles were synthesized by irradiating a 50 μm thick Low-density Polyethylene (LDPE) film with ultraviolet (266 nm) nano-second laser beams at an irradiation fluence of 40 mJ/cm2, a beam area of 0.023 cm2 and a repetition rate of 10 Hz to locally break the σ bonds. The LDPE film was placed in a cell filled with ultra-pure water in an environment as free as possible from solvent residues and surfactants. The particles generated by nano-second laser ablation were evaluated by a DLS particle size, zeta potential, and molecular weight measurement system. The shape of the nanoparticles was also confirmed by field emission scanning electron microscopy (FE-SEM). The particle size measurement by DLS confirmed the formation of 180–800 nm particles after 0.5–12 h of laser irradiation. The observation of the particle shape by FE-SEM showed not only independent particles, but also some agglomerated states. The application of laser ablation is shown to be an effective method for the generation of nano-sized plastic particles which can serve as model samples for ecological interactions and toxicity studies. © 2023, The Author(s), under exclusive licence to Springer science+Business Media, LLC, part of Springer Nature.

关键词： Laser ablation

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AI for organic and polymer synthesis

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science China Chemistry 2024年第8期67卷 2461-2496页

作者： Xin Hong Qi Yang Kuangbiao Liao Jianfeng Pei Mao Chen Fanyang Mo Hua Lu Wen-Bin Zhang Haisen Zhou Jiaxiao Chen Lebin Su Shuo-Qing Zhang Siyuan Liu Xu Huang Yi-Zhou Sun Yuxiang Wang Zexi Zhang Zhunzhun Yu Sanzhong Luo Xue-Feng Fu Shu-Li You Center of Chemistry for Frontier Technologies Department of ChemistryZhejiang UniversityHangzhou 310027China Center of Basic Molecular Science Department of ChemistryTsinghua UniversityBeijing 100084China Guangzhou National Laboratory Guangzhou 510005China Center for Quantitative Biology Academy for Advanced Interdisciplinary StudiesPeking UniversityBeijing 100871China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200433China School of Materials Science and Engineering Peking UniversityBeijing 100871China Beijing National Laboratory for Molecular Sciences Center for Soft Matter Science and EngineeringKey Laboratory of Polymer Chemistry and Physics of Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China AI for Science(AI4S)-Preferred Program Shenzhen Graduate SchoolPeking UniversityShenzhen 518055China State Key Laboratory of Chemical Biology Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China Department of Chemical Sciences National Natural Science Foundation of ChinaBeijing 100085China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

Recent years have witnessed the transformative impact from the integration of artificial intelligence with organic and polymer synthesis. This synergy offers innovative and intelligent solutions to a range of classic problems in synthetic chemistry. These exciting advancements include the prediction of molecular property, multi-step retrosynthetic pathway planning, elucidation of the structure-performance relationship of single-step transformation, establishment of the quantitative linkage between polymer structures and their functions, design and optimization of polymerization process, prediction of the structure and sequence of biological macromolecules, as well as automated and intelligent synthesis platforms. Chemists can now explore synthetic chemistry with unprecedented precision and efficiency, creating novel reactions, catalysts, and polymer materials under the datadriven paradigm. Despite these thrilling developments, the field of artificial intelligence(AI) synthetic chemistry is still in its infancy, facing challenges and limitations in terms of data openness, model interpretability, as well as software and hardware support. This review aims to provide an overview of the current progress, key challenges, and future development suggestions in the interdisciplinary field between AI and synthetic chemistry. It is hoped that this overview will offer readers a comprehensive understanding of this emerging field, inspiring and promoting further scientific research and development.

关键词： organic synthesis polymer synthesis machine learning prediction chemical database automated synthesis

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An Assessment of Patent Scoring Using Natural Language programming

An Assessment of Patent Scoring Using Natural Language Progr...

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2022 Portland International Conference on Management of engineering and Technology, PICMET 2022

作者： Khongamnuaisak, Lertchai Pentrakoon, Duanghathai Sinthupinyo, Sukree Suanpong, Kwanrat Chulalongkorn University Technopreneurship and Innovation Management Program Graduate School Bangkok Thailand Chulalongkorn University Faculty of Science Department of Materials Science Bangkok Thailand Faculty of Engineering Chulalongkorn University Department of Computer Engineering Bangkok Thailand Chulalongkorn Business School Commerce Department Bangkok Thailand

ISBN: (数字)9781890843410

ISBN: (纸本)9781890843410

Patent has been an increasingly important role in the world because it is not only significant to protect the invention of the company's business but also to generate revenue from the commercialization. WIPO (2018) reports that the repository has many patents so, to assess patent, it consumes time and requires various expertise. Generally, several models have been developed to address this matter, which to assess using a questionnaire tool for portfolios by human. Perhaps, there is not precise because it is assessed base on personal bias or previous experience of expertise. So that, occurs bias any limitation exists that our research will address by artificial intelligence. Thus, this research applies a Natural Language programming to assess for commercial of the patent. Then, the obtained data is used to assigned factors and calculate the model for assessing the commercialization of patent. This finding should deliver an alternative effective patent assessment, which is tool addresses, some current deficiency patent assessment for commercialization. © 2022 PICMET.

关键词： Patents and inventions

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The Effect of air carbon arc gouging on the mechanical and electrochemical properties of AISI 316L submerged arc welds 11

The Effect of air carbon arc gouging on the mechanical and e...

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11th European Stainless Steel Conference science and Market, ESSC 2022 and 7th European Duplex Stainless Steel Conference and Exhibition, DUPLEX 2022

作者： Campesan, Gabriel Roberto de Bribean Guerra, Ana Paula Koga, Guilherme Yuuki Bolfarini, Claudemiro Federal University of São Carlos Department of Materials Science and Engineering Rod. Washington Luis São Carlos SP CEP 13565-905 Brazil Federal University of São Carlos Graduate Program in Materials Science and Engineering Rod. Washington Luis São Carlos SP CEP 13565-905 Brazil

ISBN: (纸本)9788898990269

In the maintenance and manufacturing practices of equipment in the petrochemical industry, the air carbon arc gouging-ACG is used in the preparation of carbon steel joints to be repaired or joined by welding. However, the Standards impose several restrictions to the use of this cost-effective process to stainless steels. The main concern is the pick-up of carbon and sensitization of the steels against corrosion. Therefore, this paper aimed to evaluate the effect of ACG of AISI 316L steel on its electrochemical and mechanical properties. The repaired/welded joints were studied in three different situations, namely: i) any type of cleaning, ii) brushing and iii) machining after gouging. The 20-mm-thick plate was submerged arc welded. Different regions on cross-section of welds were inspected to assess the degree of sensitization by double-loop electrochemical potentiokinetic reactivation (DL-EPR) method, and the risk of intergranular corrosion by oxalic acid etching tests. The electrochemical techniques and mechanical tests (only welded joints) such as tensile, hardness and impact measurements showed no impairing of such properties with the use of ACG, irrespective to the cleaning method used. © ESSC and DUPLEX 2022. All rights reserved.

关键词： Welds

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Study of Silicon Nitride Etched by Cyclic Atomic Layer Etching

Study of Silicon Nitride Etched by Cyclic Atomic Layer Etchi...

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2022 IET International Conference on engineering Technologies and Applications, IET-ICETA 2022

作者： Yang, Tsung-Ying Kuo, Mei-Yan Chang, Edward-Yi National Yang Ming Chiao Tung University International College of Semiconductor Technology Hsinchu Taiwan National Yang Ming Chiao Tung University Graduate Program for Nanotechnology Department of Materials Science and Engineering Hsinchu Taiwan

ISBN: (数字)9781665491389

ISBN: (纸本)9781665491389

In this work, cyclic atomic layer etching (ALE) was used to etch silicon nitride (SiN) to find its working conditions. To understand the mechanism behind it, we tested the ALE adsorption effect and the removal effect of the ALE working window. Also, we made a comparison with the etching RMS of normal etching ICP and showed that ALE has better etch flatness. This demonstrates that ALE has a potential ability to become a reliable and stable etching technology in the future. © 2022 IEEE.

关键词： Silicon nitride

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Quaternary ammonium-functionalized polysilsesquioxanes for antifogging coating

RSC Applied Polymers

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RSC Applied Polymers 2024年第1期3卷 92-96页

作者： Hamada, Takashi Sugimoto, Tetsuya Tanaka, Arata Maeda, Tetsuya Katsura, Daiji Koga, Hiroyuki Ohshita, Joji Collaborative Research Laboratory Graduate School of Advanced Science and Engineering Hiroshima University 1-4-1 Kagamiyama Higashi-Hiroshima Hiroshima 739-8527 Japan Quantum Materials and Applications Research Center Takasaki Institute for Advanced Quantum Science National Institutes for Quantum Science and Technology (QST) 1233 Watanuki-machi Takasaki Gunma 370-1292 Japan Technical Research Center Mazda Motor Corporation Aki-gun Hiroshima 730-8670 Japan Smart Innovation Program Graduate School of Advanced Science and Engineering Hiroshima University 1-4-1 Kagamiyama Higashi-Hiroshima Hiroshima 739-8527 Japan Division of Materials Model-Based Research Digital Monozukuri (Manufacturing) Education and Research Center Hiroshima University 3-10-32 Kagamiyama Higashi-Hiroshima Hiroshima 739-0046 Japan

Aiming to develop antifogging materials with enhanced antifogging properties and scratch resistance, polysilsesquioxane films containing quaternary ammonium groups were prepared via a sol-gel reaction and quaternization. Owing to their high water uptake, scratch hardness, and transparency, the prepared quaternary ammonium-functionalized polysilsesquioxane films are promising for application in antifogging coatings. © 2025 RSC.

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Resolving Contradictory Estimates of Band Gaps of Bulk PdSe2: A Wannier-Localized Optimally-Tuned Screened Range-Separated Hybrid Density Functional Theory Study

arXiv

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arXiv 2025年

作者： Florio, Fred Camarasa-Gómez, María Ohad, Guy Naveh, Doron Kronik, Leeor Ramasubramaniam, Ashwin Department of Mechanical and Industrial Engineering University of Massachusetts Amherst AmherstMA01003 United States Department of Molecular Chemistry and Materials Science Weizmann Institute of Science Rehovoth7610001 Israel Institute for Nanotechnology and Advanced Materials Bar-Ilan University Ramat Gan52900 Israel Materials Science and Engineering Graduate Program University of Massachusetts Amherst AmherstMA01003 United States

Palladium diselenide (PdSe2)—a layered van der Waals material—is attracting significant attention for optoelectronics due to the wide tunability of its band gap from the infrared through the visible range as a function of the number of layers. However, there continues to be disagreement over the precise nature and value of the optical band gap of bulk PdSe2, owing to the rather small value of this gap that complicates experimental measurements and their interpretation. Here, we design and employ a Wannier-localized optimally-tuned screened range-separated hybrid (WOT-SRSH) functional to investigate the electronic bandstructures and optical absorption spectra of bulk and monolayer PdSe2. In particular, we account carefully for the finite exciton center-of-mass momentum within a time-dependent WOT-SRSH framework to calculate the indirect optical gap and absorption onset accurately. Our results agree well with the best available photoconductivity measurements, as well as with state-of-the-art many-body perturbation theory calculations, confirming that bulk PdSe2 has an optical gap in the mid-infrared (upper-bound of 0.44 eV). More generally, this work further bolsters the utility of the WOT-SRSH approach for predictive modeling of layered semiconductors. Copyright © 2025, The Authors. All rights reserved.

关键词： Layered semiconductors

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Surface Characterization of Sodium Cholate Treated CVD Graphene

Surface Characterization of Sodium Cholate Treated CVD Graph...

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IEEE Conference on Nanotechnology

作者： Evans Addo-Mensah Janet Obaemo Katie Welch Yang Tian Shiva Dolatabadi Hugh Churchill Uchechukwu Wejinya Materials Science and Engineering Graduate Program University of Arkansas Microelectronics and Photonics Program University of Arkansas Department of Physics University of Arkansas Fayetteville Arkansas Department of Mechanical Engineering University of Arkansas Fayetteville Arkansas

The advancement of graphene has created a need in exploring its properties for different applications. One way to explore its properties is by reducing its hydrophobicity. To overcome hydrophobicity of graphene, surfactants have been used in functionalization, hence improving the surface properties of the graphene monolayer. Therefore, investigating surfactant treatment for CVD graphene becomes useful in understanding the surface property effects on graphene. This study utilizes CVD graphene on silicon substrates. Its treatment was done with varying concentrations of Sodium Cholate (SC) for different treatment times. These samples were then characterized using Atomic Force Microscopy (AFM) to investigate the surface properties of the samples before and after treatment. To be optimized, the graphene must remain attached to the silicon substrate. The result shows that the integrity of the graphene, which is basically the Sp2 structure, is preserved as there was no delamination from the substrate even after treatment for as long as 2 hours in 1% weight/volume concentration of the SC solution.

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Thermodynamic and Environmental Assessment of Low-GWP Alternative Refrigerants for Domestic Cooling

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Journal of The Institution of Engineers (India): Series C 2023年第2期104卷 377-383页

作者： Islam, Md. Amirul Rupam, Tahmid Hasan Hosan, Shahadat Saha, Bidyut Baran Institute for Materials Chemistry and Engineering Kyushu University Kasuga-Koen 6-1 Kasuga-Shi Fukuoka816-8580 Japan Department of Electrical and Electronics Engineering Bangabandhu Sheikh Mujibur Rahman Science and Technology University Gopalganj8100 Bangladesh Kyushu University 744 Motooka Nishi-Ku Fukuoka819-0395 Japan Kyushu University Program for Leading Graduate School Green Asia Education Center Kyushu University Fukuoka Japan Department of Mechanical Engineering Kyushu University 744 Motooka Nishi-Ku Fukuoka819-0395 Japan

Nearly two billion air-conditioning (AC) units are currently being used for space cooling worldwide. The majority of these ACs use R134a as the working fluid, a greenhouse gas (GHG) with a global warming potential (GWP) of 1300 kg-CO2-eq. According to the rules set by the world environment safety organizations, the GWP of domestic air-conditioning systems must not exceed 750 kg-CO2-eq. Hence, the R134a must be phased out by 2025, and an alternative refrigerant with similar thermodynamic properties yet low GWP is required. Therefore, the authors have investigated several potential binary/ternary refrigerant blends in this study. Among the studied refrigerants, R445A, R30A, and NPB2 (newly proposed blend: 8% R152a + 92% R1234yf) can reduce 90–99% global warming impact (more than 200 million tonnes of CO2 emission equivalent) caused by the domestic air-conditioning systems every year. © 2023, The Institution of Engineers (India).

关键词： Refrigerants

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