Abstract: An apparatus, method, system, computer program and product, each capable of assisting a printed board design process. A predetermined combination including information regarding at least two of a board material, board sheet, and a printed circuit board is prepared before performing the printed board design process.

Abstract: An apparatus, method, system, computer program and product, each capable of assisting a printed board design process. A predetermined combination including information regarding at least two of a board material, board sheet, and a printed circuit board is prepared before performing the printed board design process.

Abstract: A casing is composed of two hollow members which are made of an elastic material and stacked in a manner of one above the other. When the casing is mounted on a frame of a body of equipment with a shoulder bolt, the hollow members are made airtight.

Abstract: A monoclonal antibody specific to a human placenta-derived coagulation inhibitor is disclosed. The antibody is produced by culturing a hybridoma which secretes it. A human placenta-derived coagulation inhibitor can be purified by using the monoclonal antibody as an immunoadsorbent. The human placenta-derived coagulation inhibitor can be immunologically assayed by using the monoclonal antibodies.

Abstract: Novel human placenta-derived anticoagulating substances having the following properties:(1) molecular weight of 34,000.+-.2,000 determined by SDA-polyacrylamide gel electrphoresis under reduced state;(2) isoelectric point of 4.7.+-.0.1 determined by isoelectric column electrophoresis using an ampholite;(3) stabilityinactivated by heat treatment at 50.degree. C. to 30 minutes, stable at a pH of 4-10, and stable in plasma at 37.degree. C. for 30 minutes;(4) activitycapable of prolonging a recalcification time, a prothrombin time, and an activated partial thromboplastin time; and(5) the existence of several amino acids including aspartic acid, threonine, serine, and so on; are prepared by homogenizing human placenta, subjecting the resulting homogenate to centrifugal separation, extracting an anticoagulating substance from the residue or from a microsome fraction contained in the supernatant with a surface active agent and/or a chelating agent, and purifying and isolating the substance from the extract.

Abstract: A grinding wheel comprising abrasive grains each of which is coated with a conductive material and a non-conductive binder interposed among said abrasive grains. The amount of said conductive material ranges from 30 to 80% by weight based on said abrasive grains. The abrasive grains coated with said conductive material is contained in said grindstone in an amount ranging from 33 to 64% by volume. A method of producing said grinding wheel is also proposed. The method comprises preparing a mixture of said coated abrasive grains and said non-conductive binder, filling the mixture into a mold and molding said mixture by applying a pressure while maintaining said mixture at a constant temperature.

Abstract: A grinding wheel which comprises a number of abrasive grains coated with an electrically conductive material, an electrically non-conductive bond having a number of diamond filler dispersed therein. A method of producing the grinding wheel which comprises preparing a mixture of coated abrasive grains, non-conductive bond and diamond filler, filling the mixture into a mold and molding said mixture by applying a pressure while maintaining said mixture at a constant temperature.