Eriko Kimura

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If titanium dioxide nanoparticles are inert and non-biodegradable, they must be evaluated similarly to fullerenes, carbon nanotubes and asbestos. We surveyed the titanium level in typical raw food materials, and then intravenously injected titanium dioxide nanoparticles (primary particle diameter: 15 nm; secondary particle size: 220 nm) in mice and(More)
Four new 4-hydroxy-2-pyridone alkaloids, didymellamides A-D (1-4), were isolated from the marine-derived fungus Stagonosporopsis cucurbitacearum. The structures of 1-4 were elucidated from spectroscopic data (NMR, MS, and IR), and the absolute configuration of 1 was determined by X-ray diffraction analysis. Didymellamide A (1) exhibited antifungal activity(More)
The aim of the present study was to quantitatively evaluate the skin permeation/penetration of nanomaterials and to consider their penetration pathway through skin. Firstly, penetration/permeation of a model fluorescent nanoparticle, Fluoresbrite®, was determined through intact rat skin and several damaged skins. Fluoresbrite® permeated through only(More)
The permeation pathway of macromolecules and nanospheres through skin was evaluated using fluorescent isothiocyanate (FITC)-dextran (average MW, 4 kDa) (FD-4) and nanospheres (500 nm in diameter) in hairless rat abdominal skin and porcine ear skin as well as a three-dimensional cultured human skin model (cultured skin model). A low molecular hydrophilic(More)
Curcumin was converted into its oligosaccharides by cultured Parthenocissus tricuspidata cells-catalyzed glycosylation. In addition to curcumin 4'-O-glucoside (9%) and curcumin 4',4''-O-diglucoside (14%), two curcumin oligosaccharides, i.e., curcumin 4'-O-gentiobioside (16%) and curcumin 4'-O-gentiobiosyl-4''-O-glucoside (3%), were isolated from P.(More)
We have proposed a method called Bump Mapping onto Real Objects (BMRO)[1] for displaying the appearance of curved surface on flat media. The method converts normal vectors of modeled curved surface into directions of grooves by which anisotropic reflection occurs for displaying a curved surface. Although curved surfaces can appear on media by BMRO, it is(More)
Human beings are exposed or otherwise a subjected to a various chemical compounds. Various nanomaterials are contained in the chemical compounds which are used in many fields. Nanomaterials are also used in cosmetics: titanium dioxide and zinc oxide are examples. Consumers who apply cosmetics to their skin as well as workers at industrial plants may thus be(More)
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