Abstract: A novel natural compound having various therapeutically effects is provided. The compound is obtainable from Sibiraea leaves by aqueous extraction and is represented by a formula (1) as follows.

Abstract: A novel natural compound having various therapeutically effects is provided. The compound is obtainable from Sibiraea leaves by aqueous extraction and is represented by a formula (1) as follows.

Abstract: A composition for enhancing resistance to plant diseases comprising (1) chitosan, (2) lactic acid or succinic acid or both of the two, or the two and glutamic acid, and as the essential or optional ingredient (3) a plant activating agent such as a plant hormone, etc. It can protect plants without badly affecting the environment.

Abstract: A compound represented by the following formula (I):X--Y--Z (I)where Y is represented by the following formulae: ##STR1## X is a monovalent group of a tetracycline type compounds and Z is a monoent group of a steroid type compound such as estrogen.The compound can concentrate on the bone tissue and has bone resorption inhibition/ossification promotion functions.

Abstract: A membrane for dry metal-air chemical current sources which posses high oxygen permeability and provide high barrier properties toward water vapor. The invention includes a semipermeable porous asymmetric membrane based on vinylidene fluoride polymer comprising copolymer of vinylidene fluoride with tetrafluoroethylene at 8-70% mass content of tetrafluoroethylene, the membrane pore size being 0.0015-0.030 .mu.m, and the volume porosity being 35-60%, wherein said asymmetric membrane has a more dense porous structure on one side of the membrane than on another side of said membrane, and wherein the water vapor permeability is not more than 0.178 mg/h. cm.sup.2 and the oxygen permeability is not less than 2.70 m.sup.3 /m.sup.2 atm h.

Abstract: A compound represented by the following formula (I):X--Y--Z (I)?where Y is represented by the following formula (III): ##STR1## X is a monovalent group of a tetracycline type compound, and Z is a monovalent group of a steroid type compound such as estrogen!. The compound can concentrate on the bone tissue and has a bone resorption inhibition/ossification promotion functions.

Abstract: A pharmaceutical composition comprising a compound represented by the following formula (I):X--Y--Z (I)?where Y is represented by the following formula (III): ##STR1## X is a monovalent group of a tetracycline type compound, and Z is a monovalent group of asteroid type compound such as estrogen!.The compound can concentrate on the bone tissue and has a bone resorption inhibition/ossification promotion functions.

Abstract: A panel fence is provided with a net having a mesh surface, and meshes are distributed on the whole area of the net surface. These meshes are in the shape of a rectangle and the size is equal. A panel piece is removably and selectively mounted on the mesh and blockades the mesh. The panel pieces mounted on the meshes express pictures, letters or patterns on the net.

Abstract: A lighting apparatus is provided which comprises a color disc capable of transmitting light therethrough and arranged within a housing having an opening. The color disc has a planar surface parallel to the opening, and a large number of subdivided sections defined on the planar surface. The subdivided sections are individually colored in one of a plurality of colors such that, when viewed as a whole, the planar surface has a plurality of identical coloration patterns each consisting of the subdivided sections of the same color and that any adjacent ones of the coloration patterns are different in color from each other. A shutter disc is arranged between the color disc and the opening and has a large number of windows for permitting only those subdivided sections forming one of the coloration patterns to be exposed to the outside of the housing when the shutter disc is at a predetermined rotational angle position.