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dual-porous ZIF-8 heterogeneous catalysts with increased reaction sites for efficient PET glycolysis

Chemosphere 2024年 364卷 143187页

作者： Han, Nara Lee, Kyunghan Lee, Jieun Jo, Jin Hui An, Eun Ji Lee, Gicheon Chi, Won Seok Lee, Chanmin School of Polymer Science and Engineering Chonnam National University 77 Yongbong-ro Buk-gu Gwangju61186 Korea Republic of 291 Daehak-ro Yuseong-gu Daejeon Korea Republic of Department of Polymer Engineering Graduate School Chonnam National University 77 Yongbong-ro Buk-gu Gwangju61186 Korea Republic of Green Circulation R&D Department Research Institute of Sustainable Development Technology Korea Institute of Industrial Technology 89 Yangdaegiro-gil Ipjan-myeon Seobuk-gu Chungcheongnam-do Cheonan-si31056 Korea Republic of Hydrogen·Fuel Cell Research Group Eco-friendly Power Lab Korea Construction Equipment Technology Institute 36 Sandan-ro Gunsan-si Jeollabuk-do54004 Korea Republic of

Poly (ethylene terephthalate) (PET) has been widely used for drink bottles, food packing, films, and fibers, resulting in millions of tons of waste PET. Less than 10% of that waste is recycled, and the rest is discarded or incinerated. Waste PET upcycling employs chemical recycling and particularly glycolysis to create the bis(2-hydroxyethyl) terephthalate (BHET) monomer. Herein, we report a dual-porous zeolitic imidazolate framework-8 nanoparticle (dPZIF-8) heterogeneous catalyst for efficient PET glycolysis. The dPZIF-8 nanoparticles were prepared using a triethylamine modulator, which can control the nucleation and growth mechanisms of the ZIF-8 nanoparticles. The dPZIF-8 nanoparticles include both intrinsic micropores and particle-particle adhesion-induced mesopores that can provide a larger external surface area of the zinc sites in the ZIF-8 architecture. The PET glycolysis catalyzed by dPZIF-8 at 180 °C and 1 atm for 4 h shows a PET conversion of 91.7% and a BHET yield of 76.1%, the latter particularly being much higher than with a traditional heterogeneous ZIF-8 catalyst. This dual-porous structure rational design strategy can be versatile for other metal–organic frameworks (MOFs) to increase the interfacial catalytic reaction sites between the metal–organic framework and the polymer, enhancing the PET depolymerization performance and efficiency. © 2024 Elsevier Ltd

关键词： Catalysis

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Leveraging Augmented and Virtual reality in Conjunction with Artificial Intelligence, 5G, and Edge Computing to Transform Immersive Experiences

Leveraging Augmented and Virtual Reality in Conjunction with...

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Smart Technologies, Communication and robotics (STCr)

作者： G.Palanikumar V.Samuthira Pandi S.Banumathi G. Karthikeyan Jayant Giri Maram Y. Al-Safarini Department of Mathematics Sri Venkateswara College of Engineering (SVCE) Tamil Nadu Centre for Advanced Wireless Integrated Technology Chennai Institute of Technology Chennai Tamil Nadu India Department of Computer Science Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology Veltech University - Deemed to be University Chennai Tamil Nadu India Department of VLSI Microelectronics Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences (SIMATS) Saveetha University Chennai Department of Mechanical Engineering Yeshwantrao Chavan College of Engineering Nagpur. Division of Research and Development Lovely Professional University Phagwara India Computer Science Department Zarqa University Zarqa Jordan University of Business and Technology Jeddah Saudi Arabia

ISBN: (数字)9798350357530

ISBN: (纸本)9798350357547

Ar, Vr, AI, 5G, and Edge Computing are converging to reshape immersive experiences across industries in terms of content creation, content delivery and content interaction. Ar and Vr have achieved remarkable progress so far in fields like the gaming industry, education, healthcare, and entertainment, and are already delivering immersive and realistic environments for users. Nonetheless, the real magic happens with their combination with AI, 5G and Edge Computing, which makes immersive experiences perform, scale and respond better to interactions. AI and Ar/Vr create a symbiotic relationship where AI designs intelligent interaction, personalizes user experience, and aids decision-making in Ar/Vr environments by analyzing user behaviors and context in real-time. Simultaneously, the rollout of 5G networks will provide ultra-low latency, high-speed data transfer, and immense connectivity, all of which are critical to rendering high-quality asynchronous immersive experiences. By processing data to the edge, close to the end-user, Edge Computing cuts latency to the minimal level and makes sure that interactions are fast and seamless enough to make immersive applications work. This paper discusses the convergence of Ar/Vr with the other digital technologies such as AI, 5G, and Edge computing and its impact on industries leading to more immersive, scalable and personalized experiences. In this report, we explore how these technologies make one another better, resulting in breakthroughs across fields like telemedicine, remote education, autonomous driving, and even virtual tourism. We also highlight the implications of this convergence in terms of data security, privacy considerations, and the requirements for computational resources. This paper encapsulates those concepts, discussing what comes next and what role immersive technologies will play in the next generation of human-computer interactions. Thus, the fusion of Ar/Vr, AI, 5G, and Edge Computing is enhancing user exp

关键词： 5G mobile communication Telemedicine Education Entertainment industry Medical services rendering (computer graphics) real-time systems Artificial intelligence Autonomous vehicles Edge computing

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Chemical Process development in the Pharmaceutical Industry in Europe—Insights and Perspectives from Industry Scientists

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Angewandte Chemie 2025年

作者： Joachim Krueger André P. dieskau Jorma Hassfeld Joerg Gries Oliver Block Hilmar Weinmann daniel Kaufmann Stefan Hildbrand Volker Kraft robert Moeckel Juan r. dehli Ulrich Scholz Carl Friedrich Nising Pharmaceuticals CMC & Technology Bayer AG D-42096 Wuppertal Germany Global CMC Development Merck Healthcare KGaA D-64293 Darmstadt Germany Chemical Process R&D Johnson & Johnson Innovative Medicine Beerse B-2340 Belgium Chemical & Analytical Development Novartis AG Basel CH-4056 Switzerland Process Chemistry & Catalysis F. Hoffmann-La Roche Ltd Basel CH-4070 Switzerland R&D Global CMC Development Synthetics Sanofi-Aventis Deutschland GmbH D-65926 Frankfurt Germany Chemical Development Boehringer Ingelheim Pharma GmbH & Co. KG D-55216 Ingelheim am Rhein Germany

Chemical process development is a critical component in the development process for active pharmaceutical ingredients (APIs). With interfaces to drug discovery and API manufacturing, chemical process development activities must deliver scalable, safe, cost-efficient, sustainable, and reliable processes for novel as well as marketed APIs. despite its importance for the pharmaceutical industry and society, the domain of chemical process development, together with its advances and challenges, is often not well known to nonpractitioners. As industry scientists, we provide a scientific perspective on the state of affairs in chemical process development, which we believe will be of value to a broader audience, including academic researchers, students, and professionals from related fields.

关键词： drug development drug discovery Industrial chemistry Pharmaceutical industry Process chemistry

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Inside Front Cover: Chemical Process development in the Pharmaceutical Industry in Europe: Insights and Perspectives from Industry Scientists

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Angewandte Chemie 2025年

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Inside Front Cover: Chemical Process development in the Pharmaceutical Industry in Europe: Insights and Perspectives from Industry Scientists

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Angewandte Chemie International Edition 2025年

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Adjuvant tamoxifen switched to exemestane treatment in postmenopausal women with estrogen receptor-positive early breast cancer:A pragmatic,multicenter,and prospective clinical trial in China

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Chinese Journal of Cancer research 2022年第6期34卷 592-600页

作者： Binghe Xu Huiping Li Zefei Jiang Lin Gu Jinhai Tang Hui Xie Yueyin Pan Yunjiang Liu Shude Cui Xiaojia Wang Li Cai Yiqiong Zhang Huadong Zhao Zhimin Shao Department of Medical Oncology National Cancer Center/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Department of Breast OncologyPeking University Cancer Hospital&InstituteBeijing 100142China Department of Breast Cancer the Fifth Medical Center of Chinese PLA General HospitalBeijing 100071China Department of Breast Cancer Tianjin Cancer Institute and HospitalTianjin 300060China Department of Breast Cancer Jiangsu Provincial HospitalNanjing 210029China Department of Breast Cancer the First Affliated Hospital of China University of Science and TechnologyHefei 230001China Department of Breast Cancer the Fourth Hospital of Hebei Medical UniversityShijiazhuang 050011China Department of Breast Cancer Henan Cancer HospitalZhengzhou 450008China Department of Breast Cancer Zhejiang Cancer HospitalHangzhou 310012China Department of Breast Cancer Harbin Medical University Cancer HospitalHarbin 150081China Department of Clinical Development Pfizer(China)R&D Co.LtdShanghai 201203China Department of Statistics Pfizer(China)R&D Co.LtdShanghai 201203China Department of Breast Surgery Shanghai Cancer Center/Cancer InstituteShanghai Medical CollegeFudan UniversityShanghai 200032China

Objective:This post-approval safety study assessed the efficacy and safety of exemestane after 2-3 years of tamoxifen treatment among postmenopausal women with estrogen receptor-positive(Er+)early breast cancer in ***:Enrolled patients had received 2-3 years of tamoxifen and were then switched to exemestane for completion of 5 consecutive years of adjuvant endocrine *** primary endpoint was the time from enrollment to the first occurrence of locoregional/distant recurrence of the primary breast cancer,appearance of a second primary or contralateral breast cancer,or death due to any *** endpoints included the proportion of patients experiencing each event,incidence rate per annum,relationships between human epidermal growth factor receptor 2 status and time to event,and relationship between disease history variables and time to ***:Overall,558 patients were included in the full analysis set:397(71.1%)completed the study,20experienced an event,and 141 discontinued[47 owing to an adverse event(AE);37 no longer willing to participate].Median duration of treatment was 29.5(range,0.1-57.7)*** time to event was not *** survival probability at 36 months was 91.4%(95%CI,87.7%-95.1%).The event incidence over the total exposure time of exemestane therapy was 3.5 events/100 person-years(20/565).Multivariate analysis showed an association between tumor,lymph node,and metastasis stage at initial diagnosis and time to event[hazard ratio:1.532(95%CI,1.129-2.080);P=0.006].Most AEs were grade 1 or 2 in severity,with arthralgia(7.7%)being the most common treatment-related ***:This study supports the efficacy and safety of exemestane in postmenopausal Chinese women with Er+breast cancer previously treated with adjuvant tamoxifen for 2-3 *** new safety signals were identified in the Chinese population.

关键词： Chinese early breast cancer exemestane tamoxifen postmenopausal women estrogen receptor-positive

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Consideration of the Behaviour of a Wind Turbine Wake Using High-Fidelity CFd Simulations 15th

Consideration of the Behaviour of a Wind Turbine Wake Using ...

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15th World Congress on Computational Mechanics and 8th Asian Pacific Congress on Computational Mechanics: Pursuing the Infinite Potential of Computational Mechanics, WCCM-APCOM 2022

作者： Shibuya, Koichiro Uchida, Takanori Inui, Masaki Bai, Zhiren Taniyama, Yoshihiro Engineering and Technology Development Department Wind Power Business Unit Carbon Neutral Solution Business Headquarters Hitachi Zosen Corporation 7-89 Nankokita 1-chome Suminoe-ku Osaka559-8559 Japan Dept. Mechanical and Systems Engineering Kyushu University 6-1 Kasuga-koen Kasuga Fukuoka816-8580 Japan Kyushu University 6-1 Kasuga-koen Kasuga Fukuoka816-8580 Japan Department of Mechanical Engineering Osaka University 2-1 Yamadaoka Suita-shi Osaka565-0871 Japan Mechanical Engineering R&D Department Energy Systems Research and Development Center Toshiba Energy Systems & Solutions Corporation 8 Shinsugita-Cho Isogo-ku Yokohama-shi Kanagawa235-8523 Japan

during operation of a wind turbine, wake flow occurs behind the wind turbine, reducing the amount of power generation and the life of the downwind wind turbine. To understand wind turbine wake flow, Computational Fluid dynamics (CFd) simulations were conducted using "rIAM-COMPACT" to reproduce wind turbine wake flow. There is no significant difference in the flow field of the wind turbine wake between upwind-type and downwind-type turbines. In the 5d downstream of the wind turbine, the vertical distribution of the mainstream velocity component is almost the same regardless of the power of the inflow profile in the swept area. When the inflow wind has a wind direction change of up to 10 degrees, the wind turbine wake is quite diffuse, and its vertical distribution is in good agreement with the field measurements made by the vertical profile lidar. © 2022 WCCM-APCOM 2022 - 15th World Congress on Computational Mechanics and 8th Asian Pacific Congress on Computational Mechanics: Pursuing the Infinite Potential of Computational Mechanics. All rights reserved.

关键词： Large eddy simulation

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Uncovering the Mechanism of the Lme Susceptibility for the Galvanized and Electrogalvanized dp 1180 Steels

SSRN

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SSrN 2023年

作者： Zhou, Jiayi Sun, Yu Hu, Tianhan Pan, Hua Lei, Ming ding, Kai Gao, Yulai State Key Laboratory of Advanced Special Steel School of Materials Science and Engineering Shanghai University Shanghai200444 China Automobile Steel Research Institute R&D Center Baoshan Iron & Steel Co. Ltd. Shanghai201900 China State Key Laboratory of Development and Application Technology of Automotive Steels Shanghai201900 China Shanghai Engineering Research Center for Metal Parts Green Remanufacture Shanghai200444 China

dP 1180 advanced high strength steel (AHSS) used in automobiles is usually protected from corrosion by the Zn-based coating. However, liquid metal embrittlement (LME) tends to occur in Zn-coated dP 1180 steel during the resistance spot welding (rSW) process. In the present study, the LME phenomenon of the galvanized (GI) and electrogalvanized (EG) dP 1180 steel was comparatively investigated based on the LME susceptibility evaluation standard. The results showed that the observed longest crack for dP 1180 steel with GI coating was around 121.2 μm at the shoulder of the welding spot. On the contrary, the maximum length of the LME crack was as long as 792.6 μm located at the center of the welding spot for the specimen with EG coating. due to the different galvanizing processes, the microstructure could differ during the annealing, thus influencing the occurrence of LME. Furthermore, the microstructure observation results reflected that the protection of an interfacial oxide layer in GI specimen could alleviate the formation of LME to some extent. Therefore, it is deemed that the existence of the interfacial oxide layer could account for the various LME susceptibility of the GI and EG dP 1180 steels. © 2023, The Authors. All rights reserved.

关键词： Grain boundaries

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A dendrite-Blocking Polyimide-Meta-Aramid Separator with Ultrahigh Strength and Thermostability for High-Security Lithium-Ion Battery

SSRN

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SSrN 2023年

作者： Qi, Shengli Li, Xiaogang Liu, Kefan dong, Nanxi Liu, Bingxue Tian, Guofeng Wu, dezhen State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing100029 China China Automotive Battery Research Institute Co. Ltd. No.11 Xingke Dong Street Yanqi Economic Development Zone Huairou District Beijing101407 China ENFI R&D Institute China ENFI Engineering Corporation No. 12 Fuxing Avenue Haidian District Beijing100038 China

Commercial polyolefin-based separators broadly applied in lithium-ion batteries (LIBs) seriously affect the safety and development of LIBs due to the poor thermostability and electrolyte wettabilitycaused by its low melting point and non-polar structure. In this work, a simple self-adsorption crosslinking technology is invented to fabricate polyimide-meta-aramid (PI-MA) separators with superior thermostability, wettability and safety. This technology utilizes the hydrogen bond adsorption and MA self-adhesive effect to realize the close encapsulation of MA on the surface of PI nanofiber and form a compact crosslinking structure. Specifically, the PI-MA separator has no significant deformation at 300 °C, while PP has completely melted and contracted at 200 °C. The PI-MA exhibits an electrolyte contact angle as low as 6.1 ° and the faster electrolyte diffusion rate in both horizontal and vertical directions. Moreover, in the long-term stripping/plating characterization, the lithium symmetric cell with PI-MA exhibits the stable cycle performance at a current density of 2 mA cm-2 for 1000 h. Using LiNi0.8Co0.1Mn0.1O2 (NCM811) as cathode, the cell with PI-MA has a capacity retention rate of 82.1% in the 300-cycle test at 1 C, much higher than 58.3% of PP separator. Compared with the cell assembled with PP separator exploding at 56 min, the cell with PI-MA discharged stably to the cut-off voltage within 160 min at 120 °C. © 2023, The Authors. All rights reserved.

关键词： Lithium-ion batteries

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Visualising Microstructural dynamics of Titanium Aluminium Nitride Coatings Under High-Temperature Oxidation

SSRN

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SSrN 2022年

作者： Makgae, Ofentse A. Lenrick, Filip Bushlya, Volodymyr Andersson, Jon M. M'Saoubi, rachid Ek, Martin NanoLund NanoLund Lund University Box 118 Lund22100 Sweden Centre for Analysis and Synthesis Lund University Box 124 Lund22100 Sweden Division of Production and Materials Engineering Lund University Box 118 Lund22100 Sweden R&D Materials and Technology Development Seco Tools AB Fagersta737 82 Sweden

Understanding the link between titanium-aluminium nitride’s (Ti1-xAlxN) physicochemical properties and structural dynamics during operation is essential to designing and fabricating advanced ceramic coatings. Herein we directly visualise the oxidation of Ti1-xAlxN (for x = 0, 0.18, 0.44, & 0.67) coatings from 100 to 1000 °C using environmental transmission electron microscopy and energy dispersive X-ray analysis. The high-frame-rate ETEM movies show that oxidation in TiN proceeds at the grain boundaries and cracks;in contrast, Ti1-xAlxN coatings transform from large as-deposited grains into oxide nanoparticles. Moreover, high-resolution ETEM imaging showed the presence of anatase TiO2 at the early stages of oxidation across all compositions. Above ~850 °C, the oxide nanoparticles grow through crystal merging, diffusion and recrystallisation to form rutile TiO2. The EdX elemental maps coupled with secondary electron imaging reveal a uniform TiO2 sublayer decorated with increasing coverage of Al2O3 particles for x = 0.18 to 0.44. In contrast, coatings with x = 0.67 reveal a complete in-plane phase separation of Al- and Ti-oxides, which can rationalise their decreasing long-term oxidation resistance. Finally, the study provides unique insight into the real-time structural dynamics underpinning the oxidation resistance of Ti1-xAlxN coatings. © 2022, The Authors. All rights reserved.

关键词： Titanium dioxide

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