Publications by authors named "Hyeon-Woo Shin"
Article Synopsis
- The study investigates the breakdown of residual pesticides (dinotefuran, fluazinam, indoxacarb, and thiacloprid) in persimmons after following good agricultural practices and processing methods.
- It utilizes the modified QuEchERS method and LC-MS/MS for analyzing pesticide levels, confirming the effectiveness of these methods through linearity, recovery, and limit of quantitation.
- Findings indicate that while many residues significantly decrease over time, those from systemic pesticides remain relatively stable, suggesting that peeling and processing effectively remove non-systemic pesticide residues.
We implement a peer-to-peer (P2P) energy trading system between prosumers and consumers using a smart contract on Ethereum blockchain. The smart contract resides on a blockchain shared by participants and hence guarantees exact execution of trade and keeps immutable transaction records. It removes high cost and overheads needed against hacking or tampering in traditional server-based P2P energy trade systems.
View Article and Find Full Text PDFEffect of Processing on Residual Buprofezin Levels in Ginseng Products.
Int J Environ Res Public Health
January 2021
This study determined residual buprofezin levels in fresh ginseng and evaluated their changes during processing. Supervised field trials were conducted at Yeongju, Geumsan, and Goesan, Korea. Buprofezin 12.
View Article and Find Full Text PDFWe report a nanoscale morphology-regulation strategy of self-assembled double-hydrophilic block copolymers with square planar Pt compounds. The selective coordination of Pt on the chelating blocks of poly(acrylic acid)--poly(ethylene glycol) (PAA--PEG) induced the self-association of metal-chelated unimers by the known cohesive force of Pt. The block-length variation of PAA with constant PEG led to the shape transition from normal core/shell and crew-cut spheres to anisotropic pearl-string structures.
View Article and Find Full Text PDFArticle Synopsis
- The study focuses on creating hybrid nanoparticles using cationic metal-mediated self-assembly of double-hydrophilic block copolymers (DHBCs), with a special emphasis on manganese (Mn) ions due to their useful properties.
- A new method is introduced for incorporating Mn ions into polymer assemblies by using pyrene-end-modified DHBCs, which allows for effective monitoring of these ions through fluorescence changes.
- The resulting manganese-loaded nanoparticles (Mn-PNPs) are designed to improve water permeability and enhance magnetic resonance imaging contrast, while also analyzing how Mn's coordination compares to that of cisplatin for better understanding of metal-chelated nanoparticles.
Encapsulation of chemotherapeutic agents inside a nanoscale delivery platform can provide an attractive therapeutic strategy with many pharmaceutical benefits, such as increased plasma solubility, prolonged in vivo circulation, and reduced acute toxicity. Given that the biological activities of polymeric nanoparticles are highly dependent on their colloidal structures, the molecular geometry-regulated programming of self-assembled nanoscale architecture is of great interest for chemical design of an ideal delivery platform. In this report, we demonstrate that the molecular geometry of block-copolymer excipients can govern the level of drug-loading capacity and core hydrophobicity of polymeric nanoparticles, which can eventually control the pH-sensitive drug-release property.
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