Abstract: 1,4-Benzothiazine-2-acetic acid derivatives having an excellent aldose reductase inhibitory activity which are useful for the prevention and treatment of diabetic complications, such as diabetic cataract, retinopathy, nephropathy and neuropathy.

Abstract: Disclosed is an anti-fogging film having a multilayer structure comprised of at least two layers of a cured film formed on a substrate. The cured film contains as main components (A) polyvinyl alcohol and (B) at least one member selected from (a) colloidal silica having an average particle size of 5 to 200 m.mu., (b) an organic silicon compound of the formula R.sup.1 R.sup.2.sub.a SiX.sub.3-a in which R.sup.1 is an organic group having 1 to 10 carbon atoms, R.sup.2 is a hydrocarbon group having 1 to 6 carbon atoms, X is a hydrolyzable group and a is 0 or 1, and (c) a hydrolysis product of an organic silicon compound of the formula R.sup.1 R.sup.2.sub. SiX.sub.3-a in which R.sup.1, R.sup.2, X and a are as defined above, wherein the ratio S.sub.2 /S.sub.1 of the weight ratio S.sub.2 of component (A) to component (B) in the layer contiguous to the topmost surface layer to the weight ratio S.sub.1 of component (A) to component (B) in the topmost surface layer is at least 1.05.

Abstract: An anti-fogging coating having a good and durable anti-fogging property is prepared by coating a composition comprised of as main components, (A) a polyvinyl alcohol, (B) a crosslinking agent, (C) water and (D) a nitrogen-containing organic solvent on a substrate, and heat-curing the coated composition.

Abstract: An ornamental article comprising a natural ornamental material such as pearl and a cured coating membrane of a composition based on organic materials which is coated on the surface of said natural ornamental material in a thickness from 0.01 .mu.m to 30 .mu.m, with improved properties such as surface luster and resistivity to scratch, light, chemicals, etc.

Abstract: Apparatus which finds particular application in a tuning device of the type which is tunable to different broadcast frequencies and which includes a scale provided with indicia corresponding to such broadcast frequencies and a pointer movable across the scale to indicate the particular broadcast frequency to which the tuning apparatus is tuned, the pointer being supported by a movable support which is guided by a guide shaft. A plurality of markers are slidably guided along at least one guide rail and are individually settable to desired locations adjacent the scale, thereby representing particular broadcast frequencies to which the tuning device is tunable. A key also is slidable along the guide shaft with the movable support, the key being selectively operative to engage a desired one of the markers to move the engaged marker therewith as the support is moved, whereby the marker is set to a desired position by reason of its engagement with the key.