Abstract: A microorganism strain which is Streptomyces griseus FERM BP-5420 and processes for preparing compounds by cultivating such microorganism strain.

Abstract: The present invention relates to ester, ether and N-alkylcarbamoyl derivatives of compound (Ia) and pharmaceutically acceptable salts thereof. These compounds exhibit excellent antibacterial activity and are useful for the treatment or prevention of bacterial infections.

Abstract: The present invention relates to ester, ether and N-alkylcarbamoyl derivatives of compound (Ia) and pharmaceutically acceptable salts thereof. These compounds exhibit excellent antibacterial activity and are useful for the treatment or prevention of bacterial infections. (wherein R1 is a hydrogen atom or a methyl group; R2a is a hydrogen atom, a protecting group for a hydroxy group, or a methyl group; R3 is a hydrogen atom or a protecting group for a hydroxy group; R4a is a hydrogen atom, a hydroxy group or a protected hydroxy group; R5 is a hydrogen atom or a protecting group for a hydroxy group; and X is a methylene group or a sulfur atom). The invention also includes compounds which are related to the aforeidentified compounds.

Abstract: A blowing agent composition for use in preparing a polyurethane foam, which is a mixture of dichlorotrifluoroethane and at least one of paraffins having 5 and 6 carbon atoms in a weight ratio of from 97:3 to 70:30.

Abstract: A converter for use with planar antennas has a probe projected into an input part of waveguide structure as extended along a plane including a circuit board in a body of the converter, an opening of which input part being disposed in parallel to the plane, whereby the converter input part is allowed to have a thickness limited within the thickness of the converter body to remarkably reduce the entire thickness for effectively realizing a minimization in the thickness of the converter.

Abstract: A plane antenna comprises a power-supply circuit, a radiator circuit and an earthing conductor which are stacked respectively with a dielectric layer interposed between them, in which the power-supply and radiator circuits are made independent of each other as electromagnetically coupled to each other and at least one of the dielectric layers is formed with a foamed resin, whereby insertion loss can be reduced to remarkably improve the antenna characteristics. Only with the interposition of the foamed resin dielectric layer or layers, an effective separation is achieved between at least the power-supply circuit and the earthing conductor or the power-supply circuit and the radiator circuit, for a large extent improvement in the assembling ability.

Abstract: A plane antenna assembly comprises a plurality of antenna bases and a signal composing means including amplifiers each connected to output part of each antenna base for composing respective outputs of the antenna bases amplified through the amplifiers, whereby a composite antenna output is obtained in correspondence to the number of the antenna bases and in an excellent S/N ratio.