Abstract: A porphyrin compound of the formula: ##STR1## wherein R.sub.1 and R.sub.2 are each --CH.dbd.CH.sub.2, --CH.sub.2 CH.sub.3, --CH(O-lower alkanoyl)CH.sub.3, --CH(OR)CH.sub.3 or --CH(O-lower alkylene-OR)CH.sub.3 ; R.sub.3 is --H, --COOH, --COO-lower alkyl, --COO-lower alkylene-OR or --COO-lower alkylene-OOC-Z; R.sub.4 is --H, -lower alkyl or -lower alkylene-OR; R is --H, -lower alkyl or a residue of a polyfunctional carboxyl compound excluding a hydrogen atom therefrom; Z is a residue of the compound of the formula (I) excluding R.sub.3 therefrom; A is --CH.sub.2 -- or --CO--; and the dotted line from the gamma-position indicates no bonding or a single direct bond; and the dotted line between the 7- and 8-positions indicates the presence of a single bond or a double bond; and its complexes with a metal(s) in the porphine skeleton and/or at the residue of the polyfuntional carboxyl compound, at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.

Abstract: Pheophorbide derivatives and alkaline salts thereof having the general formula (A): ##STR1## wherein R.sub.1 represents --CH.dbd.CH.sub.2, --CH(OH)CH.sub.3, --CH(OCH.sub.2 CH.sub.2 OH)CH.sub.3 or --CH(OCOCH.sub.3)CH.sub.3R.sub.2 represents --CH.sub.3, --CHO or --CH.sub.2 OHR.sub.3 represents .dbd.O, --OH or --OCOCH.sub.3R.sub.4 represents --H, --COOCH.sub.3, --COOCH.sub.2 CH.sub.2 OH, --COOCH.sub.2 CH.sub.2 OCOCH.sub.3, or a --CONH-- containing residue of an amino acid andR.sub.5 represents --COOH, --COONa or --COOCH.sub.3 ; provided, however, said derivatives and alkaline salts exclude pheophorbide, 9-desoxo-9-hydroxy-pheophorbide and pyropheophorbide.Dimeric pheophorbide derivatives and alkaline salts thereof represented by the general formula (B): ##STR2## wherein R.sub.1 through R.sub.5 are the same as in general formula (A), are useful for treating cancer having a strong preferential affinity for cancer cells over normal cells and exerting upon irradiation a destructive effect on such cancer cells.

Abstract: Nine-desoxo-hydroxy-pheophorbide derivatives and alkaline salts thereof represented by the general formula: ##STR1## wherein R.sub.1 represents CH.sub.3 or CH.sub.2 OH,R.sub.2 represents H or Ac, andR.sub.3 represents H or alkali metal,are useful for treating cancer having a strong preferential affinity for cancer cells over normal cells and exerting upon irradiation a destructive effect on such cancer cells.

Abstract: A urea-formaldehyde resin adhesive comprising a powder of a substance having the property of gradually reacting with an acid and thus consuming the acid.

Abstract: A polyurethane foam which absorbs impact effectively is prepared by cross-linking short chain polyol to high polymer polyol chains by using polyisocyanate.

Abstract: A flexible foamed product with skin, characterized in that on the surface of the foamed product there is formed a skin composed of the reaction product of a linear urethane polymer, a polyol or an urethane prepolymer with an OH-terminal group compatible with the linear urethane polymer, and a blocked isocyanate; and the process for manufacturing such a product.

Abstract: A process for manufacturing high-resilient flexible urethan foams characterized by, reacting and foaming polyalkylene ether polyol and an organic polyisocyanate in the presence of a blowing agent, a surfactant and catalyst, (1) using as said polyalkylene ether polyol one which contains 2 to 10% by weight of a vinyl type polymer and in which its hydroxyl number ranges from 25 to 60 mg KOH/g, of its hydroxyl groups 20 to 70 mol% are primary hydroxyl groups and the remaining hydroxyl groups are secondary hydroxyl groups; (2) using as said organic polyisocyanate a mixture of tolylene diisocyanate with diphenylmethane diisocyanate or a crude diphenylmethane diisocyanate; and (3) using as said surfactant a mixture of a high-molecular-weight siloxane-oxyalkylene copolymer with a low-molecular-weight siloxane-oxyalkylene copolymer.

Abstract: Water-soluble menthol glycosides are prepared by condensing menthol with a mono- or oligosaccharide, preferably a mono- or di-saccharide, i.e., a sugar, or acyl derivative thereof, using a condensing agent or catalyst as needed. These glycosides are hydrolyzed by carbohydrase enzymes, as occur in the human mouth, or common acids, releasing menthol, and provide a more persistent flavor than menthol alone.

Abstract: Water-soluble menthol glycosides are prepared by condensing menthol with a mono- or oligosaccharide, preferably a mono- or disaccharide, i.e., a sugar, or acyl derivative thereof, using a condensing agent or catalyst as needed. These glycosides are hydrolyzed by carbohydrase enzymes, as occur in the human mouth, or common acids, releasing menthol, and provide a more persistent flavor than menthol alone.