Motion of a graph by nonsmooth weighted curvature

Geometric evolutions of curves represented by graphs are studied when the interface energy is not necessarily smooth. The theory of nonlinear semigroups yields a unique global solution even if the initial curve is not necessarily admissible. Usual evolution law for the crystalline interface energy is justified

Reactive sintering and particle morphology control of β″-alumina-based water purification filters

This paper reports on the preparation of porous membranes consisting of plate-like β″-alumina grains and the evaluation for microfiltration properties. Porous β″-alumina-based ceramics were prepared by the solid-state reactive sintering of Na2CO3 and α-Al2O3 at 1100–1300 °C. To study the effect of impurities in the starting powder mixtures, LiF-doped membranes were also prepared. As for the water filtration test, the turbidity before and after the vacuum filtration was measured using sintered porous membranes. To simulate bacteria-contaminated water, a suspension of a commercial boehmite powder (D50 = 0.7 μm) in distilled water was used. The non-doped samples sintered at 1200 °C were composed of β″-alumina (84 wt%) and β-alumina (16 wt%) grains and showed a good microfiltration performance; the turbidities before and after filtration were 894.4 NTU and 1.46 NTU, respectively

Simple synthesis of 1,3,4,5a,6,10b,11,11a-octahydro-2H-pyrazino[1\u27,2\u27:1,5]pyrrolo[2, 3-b]indole derivatives based on 1-hydroxyindole chemistry

金沢大学大学院自然科学研究科生理活性物質科学金沢大学薬学部3-Substituted (3S,6S)-6-(1-hydroxyindol-3-ylmethyl)-2,5-piperazinediones are prepared for the first time. They are shown to be suitable intermediates for the synthesis of 3,10b-disubstituted (3S,5aR,10bS,11as)-1,3,4,5a,6,10b,11, 11a-octahydro-2H-pyrazino[1\u27,2\u27: 1,5]pyrrolo[2,3-b]indole-1,4-dione derivatives

Nucleophilic substitution reaction of 1-hydroxytryptophan and 1-hydroxytryptamine derivatives regioselective syntheses of 5-substituted derivatives of tryptophan and tryptamine)

金沢大学大学院自然科学研究科生理活性物質科学金沢大学薬学

Preparations of tryptamine-4,5-diones, and their diels-alder and nucleopilic addition reactions

金沢大学大学院自然科学研究科生理活性物質科学金沢大学薬学