Abstract: [PROBLEMS] The purpose of the present invention is to provide a novel preparation for a periodontal tissue and a kit including the preparation that can be used for treatment by a simple operation and has high safety and high periodontal tissue regeneration performance. [SOLUTION] The present invention relates to a preparation for a periodontal tissue, comprising autologous conditioned serum and hyaluronic acid. In particular, the preparation for a periodontal tissue of the present invention, wherein the culture supernatant is obtained by a method comprising: a first culturing step of culturing cells by using a first medium; a second culturing step of culturing, after the first culturing step, the cells by using, as a culture medium, a second medium different from the first medium; and a step of obtaining, after the second culturing step, a culture supernatant containing the second medium.

Abstract: A composite membrane is provided in which a functional separation membrane is adhered to a hydrophilic porous fluoropolymer support membrane whose pores are coated with a fluorine-containing copolymer that provides durable hydrophilic properties to the membrane.

Abstract: The present invention provides porous hydrophilic fluoropolymer membranes whose pores are coated with a hydrophilic fluorine-containing copolymer that provides durable hydrophilic properties to the membrane.

Abstract: The present invention concerns a culturing apparatus, the object of said invention being to provide an apparatus which allows an efficient oxygen supply to be achieved without damaging the cells, microorganisms or tissues that are to be cultured.

Abstract: A process for selectively separating water vapor from a multiple component gaseous mixture is provided. The process comprises passing a multicomponent gaseous mixture including water vapor along and in contact with a membrane which is selectively permeable to water vapor and wherein the water vapor permeation rate Q.sub.H.sbsb.2.sub.O is greater than 30 Nm.sup.3 /m.sup.2 .multidot.hr.multidot.atm at 25.degree. C. and the ratio of Q.sub.H.sbsb.2.sub.O to the permeation rate Q.sub.G of the gas to be separated from the water vapor, i.e., Q.sub.H.sbsb.2.sub.O Q.sub.G, is greater than 10,000. The membrane preferably has a thickness of about 0.1 microns to about 50 microns.

Abstract: A wound dressing is provided comprising a layer of chitin affixed to a layer of porous, expanded polytetrafluoroethylene (PTFE). The chitin may be laminated to the PTFE or it may penetrate into and be impregnated in the porous PTFE layer. The composite preferably has a pressure sensitive adhesive applied in a dot pattern on its surface to enable application and securing of the dressing over a wound.