Jun Uenishi

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lide, was isolated from a Caribbean sponge, Tedania ignis, and its structure determined by Schmitz et al. in 1984. In contrast to many typical macrolides, the structure of 1 is unusual; having four labile aldol units, an a-epoxy alcohol and an 18-membered lactone formed between C16-primary alcohol and C1-carboxyl group, the synthesis of 1 seemed to be(More)
Since lead has recently been recognized as a source of environmental pollution, we have investigated new electron shielding materials that do not contain lead. We compared the shielding thicknesses of a hard plate and a sheet composed of the new materials with that of lead for electron beams. The shielding thickness was evaluated as the thickness required(More)
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