Abstract: 50-95 Parts by weight of a perfluorocarbon compound such as perfluorodecalin, perfluoromethyldecalin, perfluoro alkylcyclohexanes having 3 to 5 carbon atoms in the alkyl, perfluoro alkyltetrahydrofurans having 5 to 7 carbon atoms in the alkyl, perfluoro alkyltetrahydropyrans having 4 to 6 carbon atoms in the alkyl, perfluoroalkanes having 9 to 11 carbon atoms, and 50-5 parts by weight of a perfluoro tert.-amine such as perfluoro tert.-alkylamines having 9-11 carbon atoms, perfluoro N-alkylpiperidines having 4 to 6 carbon atoms in the alkyl, and perfluoro N-alkylmorpholines having 5 to 7 carbon atoms in the alkyl are emulsified in an aqueous medium by the aid of a high-molecular-weight nonionic surfactant have a molecular weight of about 2,000 to 20,000, and phospholipids as emulsifying agent, and fatty acids having 8 to 22 carbon atoms or salts or monoglycerides thereof as emulsifying adjuvant.The resulting oxygen-transferable emulsion having a particle size of 0.05 to 0.25.mu.

Abstract: An organ to be transplanted, such as kidney, can effectively be preserved by perfusion for a considerably long time by the use of a perfusate which is made by mixing a Ringer's solution modified by increasing potassium ion to 8-20 meq/l, a stable perfluorocarbon compound emulsion and albumin, so that the concentration of the perfluorocarbon compound is 7.5 to 12.5% (W/V) and that of albumin is 1-8% (W/V) based on the perfusate.

Abstract: A method for preparing a vegetable oil labelled with .sup.14 C or .sup.3 H, characterized by transesterifying a vegetable oil with at least one of the chemically same fatty acids labelled with .sup.14 C or .sup.3 H as those constituting said vegetable oil. The resulting labelled vegetable oil can be used in measuring biological metabolic activity of man or an animal or as a biological tracer reagent.

Abstract: Oxygen-transferable perfluorocarbon compounds having 9 to 11 carbon atoms such as perfluorodecalin, perfluoro(C.sub.3.sub.-5 -alkylcyclohexanes), perfluoro(C.sub.4.sub.-6 -alkyl tetrahydropyrans), perfluoro(C.sub.5.sub.-7 -alkyltetrahydrofurans), perfluoro(C.sub.5.sub.-7 -alkylmorpholins) and perfluoro(C.sub.9.sub.-11 -trialkylamines) are emulsified in a physiologically acceptable aqueous solution such as Ringer's solution by the aid of a phospholipid as emulsifier and a fatty acid of 8 to 22 carbon atoms, alkali metal salt or monoglyceride thereof as emulsifying adjuvant. The emulsion is stable for a considerable period of time and contains particles having a particle size ranging from 0.05 to 0.3 .mu.. It is usable as a blood substitute or a perfurate for preservation of the internal organs.

Abstract: Oxygen-transferable perfluorocarbon compounds having 9 to 11 carbon atoms such as perfluorodecalin, perfluoro(C.sub.3-5 -alkylcyclohexanes), perfluoro(C.sub.4-6 -alkyl tetrahydropyrans), perfluoro(C.sub.5-7 -alkyltetrahydrofurans), perfluoro(C.sub.5-7 -alkylmorpholins) and perfluoro(C.sub.9-11 -trialkylamines) are emulsified in a physiologically acceptable aqueons solution such as Ringer's solution by the aid of a phospholipid as emulsifier and a fatty acid of 8 to 22 carbon atoms, alkali metal salt or monoglyceride thereof as emulsifying adjuvant. The emulsion is stable for a considerable period of time and contains particles having a particle size ranging from 0.05 to 0.3 .mu.. It is usable as a blood substitute or a perfusate for preservation of the internal organs.

Abstract: An injectable fluorocarbon emulsion capable of carrying oxygen, which can be used as artificial blood and organ perfusate, is prepared by emulsifying a fluorocarbon, having an ability to dissolve at least 30 V/V % of oxygen under a 100% oxygen atmosphere at an atmospheric pressure, in an aqueous salt solution with a surfactant, centrifuging the resulting aqueous emulsion thereby to reduce the fluorocarbon particles in the emulsion in size to particle sizes of the order of about 0.05 to 0.25 .mu., and then sterilizing the thus obtained emulsion under rotation. The resulting fluorocarbon emulsion can be used as an emergency blood substitute for transfusion.