Author

K. D. Nguyen

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Open access Aug 2026

Design and Manufacturing of Defect-Free PumpCasings: A Numerical and Experimental Approach

Internal shrinkage defects often occur in sand-cast gray cast iron pump casings, particularly in areas with abrupt thickness variations where heat dissipation is limited. These defects form during the final stage of solidification when isolated liquid metal cannot be properly fed. In this study, the solidification beha...

K. D. Nguyen, Nam Ba Trung Tran, Trung Quang Pham · 0 citations

Open access Sep 2026

pH-Responsive Freeze-Thawed Polyvinyl Alcohol/Chitosan Hydrogels for Topical Delivery of Anti-Inflammatory, Antioxidant, and Antibacterial Piper betle Leaf Extract Toward Wound Healing Applications

Piper betle leaf extract (BLE) shows strong anti-inflammatory, antioxidant, and antibacterial activities. However, its application is limited due to poor water solubility, oxidative instability, and rapid clearance from the application site. To address these challenges, a crosslinker-free polyvinyl alcohol/chitosan (PV...

N. H. Do, Ha Vu Le, K. D. Nguyen et al. · Indonesian Journal of Chemis... · 0 citations