Abstract: The present invention relates to a cell strain capable of separating and multiplying an EB virus and derived from human lymphocyte cancer cells and a method of separating and multiplying the EB virus by means of said cell strain. The present cell strain can be applied to the separation and multiplication of the wild type virus present in various places, as well as to the separation and multiplication of the virus produced by homologous recombination etc. The virus newly separated and multiplied can be applied to vaccine etc. For the more efficient separation and multiplication of the virus, several markers can be inserted into the present cell strain.

Abstract: Disclosed are a resin composition for artificial marble comprising:(I) an unsaturated polyester obtained by using a divalent alcohol containing hydrogenated hisphenol A as an essential component and an .alpha.,.beta.

Abstract: A seal structure for pressure sealing between a fixed member and a movable member. The seal structure is made of a flexible seal member formed with two opposite edges, one edge being fixed to the fixed member, while the other edge lies against and contacts the movable member. A free part of the flexible seal member between the two edges thereof is generally bent around, as seen from the free part of the flexible seal member closest to its fixed edge looking towards its free part closest to its contact edge. A first space is defined on the generally concave side of the flexible seal member, and a second space is defined on the generally convex side of the flexible seal member. A higher fluid pressure present in the first space presses the contact edge of the flexible seal member firmly against the movable member.