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Hydrogen-treated CoCrMo alloy: a novel approach to enhance biocompatibility and mitigate inflammation in orthopedic implants
No full textIn recent decades, orthopedic implants have been widely used as materials to replace human bone
tissue functions. Among these, metal implants play a crucial role. Metals with better chemical stability,
such as stainless steel, titanium alloys, and cobalt–chromium–molybdenum (CoCrMo) alloy, are commonly
used for long-term applications. However, good chemical stability can result in poor tissue
integration between the tissue and the implant, leading to potential inflammation risks. This study
creates hydrogenated CoCrMo (H-CoCrMo) surfaces, which have shown promise as anti-inflammatory
orthopedic implants. Using the electrochemical cathodic hydrogen-charging method, the surface of the
CoCrMo alloy was hydrogenated, resulting in improved biocompatibility, reduced free radicals, and an
anti-inflammatory response. Hydrogen diffusion to a depth of approximately 106 ± 27 nm on the
surface facilitated these effects. This hydrogen-rich surface demonstrated a reduction of 85.2% in free
radicals, enhanced hydrophilicity as evidenced by a decrease in a contact angle from 83.5 ±1.91 to
52.4 ±2.21, and an increase of 11.4% in hydroxyapatite deposition surface coverage. The cell study
results revealed a suppression of osteosarcoma cell activity to 50.8 ±2.9%. Finally, the in vivo test
suggested the promotion of new bone formation and a reduced inflammatory response. These findings
suggest that electrochemical hydrogen charging can effectively modify CoCrMo surfaces, offering a
potential solution for improving orthopedic implant outcomes through anti-inflammatory mechanisms
Cultural presentations and extension of self from the artefacts of tableware
No full textThe artefacts of tableware have been designed to facilitate the essential and ineluctable daily practice of dining in western and Chinese cultures. Apart from performing their function, the artefacts also reflect the corresponding cultures. This study investigated how the artefacts of fork and knife vs. chopsticks daily embody and present western and Chinese cultures, respectively, as evidenced by literature and everyday life practice. Owing to complementary considerations, this study combined etic and emic approaches by applying individualism and collectivism and Chinese cultural concepts including guanxi, mianzi and yin yang as the theoretical framework. Driven by individualism, fork and knife capture features of specialization, division of labour, equality and expressiveness in western culture. On the contrary, powered by collectivism, chopsticks epitomize attributes of harmony, unity and complementarity in Chinese culture. Moreover, instead of being objectified and passive artefacts, this article argued that fork and knife vs. chopsticks have implicitly and reversely shaped the thoughts and deeds of their users in their respective cultures
「《易》主義理，不從卜筮」—— 伊藤仁齋父子對於《周易》乾、坤二卦的詮釋
Get PDF伊藤仁齋及其兒子伊藤東涯是日本儒學古學派的代表人物，古學派主張批評當時日本盛行的朱子學和陽明學，主張回到儒學的原典，「直讀聖人之書」，提出所謂的「古義」。仁齋與東涯在京都堀川的開設私塾，命名為「古義堂」，故又被稱為「堀川學派」或「古義學派」。仁齋平生專治《四書》，尤其是《論語》與《孟子》，於《周易》的著作不多，《易》學主張散見於不同著作中。其《易經古義》雖只注釋了乾坤二卦，但其《易》學主張十分鮮明，明確指出應以〈彖〉〈象〉來詮釋《周易》，亦認為〈彖〉〈象〉的出現早於孔子。仁齋的《古義》雖然在日本《易》學史上影響不大，但卻是開創了日本《易》學否定宋儒「形上學」詮釋的先河，力求以〈彖〉〈象〉回復《易》的「古義理」。而東涯的《易》學思想來自家學，但在《周易經翼通解》中所見，東涯並不桎梏於其父的只談義理，調和了仁齋一些過於激進的觀點。本文擬就著《周易》的性質及理、氣、誠三個關鍵字入手，分析伊藤仁齋、東涯父子其如何繼承及批評宋儒的論說，討論他們父子之間《易》學觀的異同
Interview - Michele De Lucchi Building the Future
Get PDFTimeless, ambitious art always transcends the present and points the way to the future. The Hong Kong Design Institute (HKDI) recently invited renowned Italian architect Michele De Lucchi to deliver a lecture titled The Equation . In his talk, De Lucchi shared his major architectural works and outlined his vision of integrating architecture with immersive environmental art installations. Central to De Lucchi\u27s vision is a humanistic approach to unite communities with nature. Like all true visionaries, De Lucchi opened minds to the limitless possibilities of art through his talk
Event Report - Hong Kong Design Institute Emerging Design Talents 2024 Leading Social Change through Transformative Design
Get PDFThe Hong Kong Design Institute\u27s (HKDI) Emerging Design Talents 2024 is a highly anticipated event that will be held over nearly three months, from June to September, showcasing more than 650 works from graduating students across various disciplines. These fields of study include Architecture, Interior Design and Product Design, Communication Design, Digital Media and Fashion and Image Design. The fashion shows and design performances emphasise how emerging designers are blending technology creatively to bring positive change through a human-centric approach. This collaboration reshapes practices and leverages interdisciplinary teamwork. The Emerging Design Talents 2024 is not only a platform for displaying budding talents but also offers audiences a glimpse into the future of collaboration between design and technology
Waste to treasure: Regeneration of porous Co-based catalysts from spent LiCoO2 cathode materials for efficient oxygen evolution reaction
Get PDFThe increasing demand for portable electronic devices and electric vehicles (EV) has triggered the rapid growth of rechargeable Li-ion batteries (LIBs) markets. However, in the near future, it is predicated a large amount of spent LIBs will be scrapped, imposing huge pressure on environmental protection and resources reclaiming. The effective recycling or regeneration of the spent LIBs not only relieves the environmental burdens but also avoids the waste of valuable metal resources. Herein, a porous Co9S8/Co3O4 heterostructure is successfully synthesized from the spent LiCoO2 (LCO) cathode materials via a conventional hydrometallurgy and sulfidation process. The fabricated Co9S8/Co3O4 catalyst proves high catalytic activity towards oxygen evolution reaction (OER) in alkaline solution, with an overpotential of 274 mV to achieve the current density of 10 mA cm-2 and a Tafel slope of 48.7 mV dec-1. This work demonstrates a facile regeneration process of Co-based electrocatalysts from the spent LiCoO2 cathode materials for efficient oxygen evolution reaction