Abstract: Peptide which is obtained by treating fish meat such as sardine with an alkaline protease is adsorbed with a peptide-adsorbing resin (such as ODS resin) and is eluted with a 10% aqueous ethanol to obtain a peptide (Y-2 fraction).

Abstract: The present invention provides a method for isolating and purifying 1,1,1,2,2-pentafluoroethyl iodide or hydrogen fluoride from a mixture of 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride, characterized by distilling an azeotropic mixture of 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride from a mixture containing 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride either after liquid—liquid separation when the mixture is heterogeneous or directly when the mixture is homogeneous to obtain 1,1,1,2,2-pentafluoroethyl iodide or hydrogen fluoride from the bottom of the distillation column.

Abstract: The present invention provides a method for isolating and purifying 1,1,1,2,2-pentafluoroethyl iodide or hydrogen fluoride from a mixture of 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride, characterized by distilling an azeotropic mixture of 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride from a mixture containing 1,1,1,2,2-pentafluoroethyl iodide and hydrogen fluoride either after liquid-liquid separation when the mixture is heterogeneous or directly when the mixture is homogeneous to obtain 1,1,1,2,2-pentafluoroethyl iodide or hydrogen fluoride from the bottom of the distillation column.

Abstract: A cosmetic containing fluorine-containing oil represented by the following formula do not inhibit the oil repellency of powder treated with a fluorine-containing compound, is excellent in affinity for the skin, and is inexpensive.

Abstract: A novel fluorinated hydrocarbon compound containing an oxygen or sulfur atom in its molecule, produced by the nucleophilic reaction of a fluorine compound with a hydrocarbon compound. This compound is useful as a lubricant for various applications and particularly excellent as an oil for refrigerators wherein hydrochlorofluorocarbon is used as the refrigerant and as a magnetic recording medium lubricant.

Abstract: A method is proposed for producing 1,1,1,3,3-pentafluoropropane, in which 1,1,3,3,3-pentafluoropropene is reduced at a temperature between 40.degree. C. and 300.degree. C. by reacting it with hydrogen in a gas phase in the presence of a palladium catalyst. Further, a method is proposed for producing 1,1,1,3,3-pentafluoropropane and/or 1,1,3,3,3-pentafluoropropene, in which the raw material 2-chloro-1,1,3,3,3-pentafluoropropene is hydrogenated especially at a temperature between 30.degree. C. and 450.degree. C. in the presence of a catalyst composed of at least one metal selected from palladium, platinum and rhodium. Further, a method is proposed of producing 1,1,3,3,3-pentafluoropropene, in which 1,1,1,3,3-pentafluoro-2,3-dichloropropane is dechlorinated by using hydrogen in the presence of a metal oxide catalyst. Based on these production methods, 1,1,1,3,3-pentafluoropropane and/or 1,1,3,3,3-pentafluoropropene can thus be produced with high yield rates.

Abstract: 2,2,3-trichloro-1,1,1,3,3-pentafluoropropane is used as a raw material, to which not less than 4.5 equivalent parts of hydrogen are added to effect a hydrogenation reaction in the presence of a noble metal catalyst, particularly a palladium catalyst, by the vapor phase method to manufacture 1,1,1,3,3-pentafluoropropane. Further, propane, propene, and hexachloropropene, etc. are chlorofluorinated in the presence of a metal catalyst to produce 2,2,3-trichloro-1,1,1,3,3-pentafluoropropane, then this compound is reduced with hydrogen in the presence of a noble metal catalyst to produce 1,1,1,3,3-pentafluoropropane. 2,2,3-trichloro-1,1,1,3,3-pentafluoropropane and 1,1,1,3,3-pentafluoropropane can thus be efficiently and economically produced.

Abstract: The present inventions provide manufacturing methods of 1,1,1,2,3-pentafluoropropene characterized by the reaction of removing HF by means of the contact of 1,1,1,2,3,3-hexafluoropropane in the gas state with active carbon or active carbon added with metallic salt. 1,1,1,2,3-pentafluoropropene can be produced from easily available 1,1,1,2,3,3-hexafluoropropane by cost-effective industrial methods at high yields according to these inventions.The inventions also provide manufacturing methods of 1,1,1,2,3-pentafluoropropane characterized by reducing 1,1,1,2,3-pentafluoropropene with hydrogen under the presence of a hydrogenation catalyst consisting of palladium added with one or more of silver, copper, gold, tellurium, zinc, chromium, molybdenum, and thallium or under the presence of a rhodium catalyst. The desired product can be produced at high reactivities and high selectivities according to these inventions.

Abstract: There is provided a method of producing 1,1,2,2,3-pentafluoropropane by reacting 1-chloro-2,2,3,3-tetrafluoropropane with hydrogen fluoride in the presence of fluorinated catalyst. By this method, 1,1,2,2,3-pentafluoropropane can be obtained industrially and economically at high yield.

Abstract: A process for preparing 1,1-dichloro-2,2,2-trifluoroethane characterized in that 1,1,1-trichloro-2,2,2-trifluoroethane is reduced with hydrogen in the presence of a hydrogenating catalyst comprising platinum to which at least one metal selected from the group consisting of silver, copper, gold, tellurium, zinc, chromium, molybdenum and thallium is added.1,1-Dichoro-2,2,2-trifluoroethne can be obtained in a high yield.

Abstract: 1,1,1,4,4,4-Hexafluorobutane is prepared by reducing 2-chloro-1,1,1,4,4,4-hexafluorobutene-2 with hydrogen in the presence of a hydrogenation catalyst containing an alloy which contains at least one first metal component selected from the group consisting of platinum and palladium and at least one second metal component selected from the group consisting of silver, copper, gold, tellurium, zinc, chromium, molybdenum and thallium. 1,1,1,4,4,4-Hexafluorobutane can be prepared in a high selectivity and a high yield.

Abstract: The invention provides a desiccant composition comprising an alcohol and a fluorinated aliphatic hydrocarbon compound of the general formulaC.sub.n F.sub.m H.sub.2n+2-mwherein m and n each is a positive integer satisfying the relations: 4.ltoreq.n.ltoreq.6 and 2n-2.ltoreq.m<2n+2, and a method of desiccating an article with said desiccant composition.

Abstract: An organism which generates energy through the decomposition of cellulose such as termites can be selectively destroyed with a fluorine-containing glycoside of the formula: ##STR1## wherein n is an even number of 2 to 20, and m is an integer of 0 to 5.

Abstract: A preamplifier for a wide range neutron flux monitoring system is disclosed. The preamplifier contains first to fifth amplifiers and a selection switch. The first amplifier for high frequency band amplification has a low input impedance circuit. The second amplifier for low frequency band amplification has a high input impedance circuit. Either of the first and second amplifiers can provide a path for the neutron flux level signal derived from a detector according to the frequency of the neutron flux level signal. The third amplifier (pulse amplifier) amplifies the output signal of the first amplifier and transfers the amplified signal to a pulse signal counting system. The lower frequency band Campbell signal is applied to the Campbelling system, through the second amplifier, the fourth amplifier (low frequency band Campbelling amplifier), and the selection switch.