Publications by authors named "Khoa Minh Ta"

Nanocrystalline ceria exhibits significant redox activity and oxygen storage capacity. Any factor affecting its morphology can tune such activities. Strain is a promising method for controlling particle morphology, whether as core@shell structures, supported nanoparticles, or nanograins in nanocrystalline ceria.

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Cerium oxide based nanozymes are intensively studied due to their catalytic activity and structural flexibility. Such nanozymes have a great future potential in human therapeutics and antimicrobial activity. The structural complexity of their surfaces enables a great variety of enzyme mimetic activities.

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Article Synopsis
  • Community-associated and hospital-acquired bacterial infections pose significant global health challenges, exacerbated by ineffective standard disinfection methods on high-touch surfaces.
  • Researchers developed a ceria-silver nanozyme that effectively eliminates harmful bacteria like Pseudomonas aeruginosa and methicillin-resistant Staphylococcus aureus on both wet and dry surfaces by damaging their cellular structures.
  • Mechanisms of action include the production of reactive oxygen species (like hydrogen peroxide) and electrostatic interactions, leading to bacterial respiration loss and eventual cell death, while showing lasting antibacterial effects in a real clinical setting.
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Cerium dioxide (CeO; ceria) nanoparticles (CeNPs) are promising nanozymes that show a variety of biological activity. Effective nanozymes need to retain their activity in the face of surface speciation in biological environments, and characterizing surface speciation is therefore critical to understanding and controlling the therapeutic capabilities of CeNPs. In particular, adsorbed phosphates can impact the enzymatic activity exploited to convert phosphate prodrugs into therapeutics and also define the early stages of the phosphate-scavenging processes that lead to the transformation of active CeO into inactive CePO.

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The disability, mortality and costs due to ionizing radiation (IR)-induced osteoporotic bone fractures are substantial and no effective therapy exists. Ionizing radiation increases cellular oxidative damage, causing an imbalance in bone turnover that is primarily driven heightened activity of the bone-resorbing osteoclast. We demonstrate that rats exposed to sublethal levels of IR develop fragile, osteoporotic bone.

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