A Hologram Computer-Aided Design Tool Extends the Function for Designing and Analyzing Holographic Optical Elements Illuminated by Multiple Point-Sources

The function of a hologram computer-aided design tool which the authors have developed are extended to handle both designing and analyzing holograms illuminated by a two or three-dimensional white-light image. The ability to search for an optimum image plane is also now possible. HOE lenses illuminated by multiple point-sources and by a point-source with a certain spectral bandwidth are designed and analyzed using the extended functions. Accuracy and usefulness of the functions are demonstrated from the results of the design and analysis.     

A simple technique to deposit molybdenum thin films

A simple technique is proposed for metallizing nonconductive objects. The technique, which is based on a plasma-induced dissociation of Mo(CO)₆ molecules, is inexpensive with no sophisticated instrument needed, and allows us to deposit fine grained, adherent thin films of molybdenum on nonrefractory substrates. It is believed that the technique possesses a variety of potential applications in laboratory works.     

Global Cauchy Problem for the 2-D Magnetohydrodynamic-α Models with Partial Viscous Terms

The global Cauchy problem for the 2-D magnetohydrodynamic-α models with partial viscous terms is studied. The vanishing limit on α is also considered in this paper.     

Effect of lignophenol on allergen mitigation

The deactivating of mite allergens was investigated using lignophenols, which are polymers with a light-beige appearance that were synthesized directly from lignocellulose with a phase-separation system. Various applications of lignophenols, instead of the photochemical solar cell dye-sensitized with lignophenol, have been reported. In the present study, lignophenols were applied for the deactivation of mite allergens.     

Synthesis of bioactive nitrogen heterocycles from marine organisms

Recently many bioactive indole alkaloids have been isolated from marine organisms. Many of them have novel ring systems which are not found in the indole alkaloids isolated from higher plants and molds on the land. We have chosen β-carboline alkaloids, eudistomins and manzamines, as targets for total synthesis.     

Synthesis of crosslinked poly(α-amino acids) with various functional groups

The esterification of the carboxyl group in copoly(γ-benzyl-L -glutamyl-L -glutamic acid) was carried out using N-hydroxysuccinimide and dicyclohexylcarbodimide to yield the activated site for the coupling reaction with amino compounds. The α-helix stability of the reactive copolymer thus obtained is remarkably affected in the presence of succinimide ring. This copolymer was proved to react nearly completely with amino alcohols such as 2-aminoethanol, 3-aminopropanol, and diethanolamine. The copoly(N⁵-hydroxyalkyl-L -glutamine) thus prepared is insoluble in water, since the benzyl ester remains in this copolymer. The copoly(α-amino acids) having another functional group were also prepared using aminoalkylsilane. Crosslinked poly(α-amino acids) were prepared by the reaction of the reactive copolymer with a low-molecular-weight polymer of PBLG having one amino group on each end of its main chain which was obtained from the corresponding NCA using p-diaminobenzene as an initiator. Another crosslinked polymer was prepared using an alkyl diamine such as 1,6-diaminohexane or 1,12-diaminododecane as a crosslinking reagent. The crosslinked copoly(α-amino acids) bearing the activated site are able to further react with various compounds having amino groups.