Abstract: An ultraviolet rays shielding hat having a sun visor is disclosed. The hat includes an elastically circular band having an outer periphery, a plurality of guide supports attached to the side portions of the outer periphery, wherein said each guide support has a guide groove in each of a top side and a bottom side thereof, an inner support disk having an inner surface and an outer surface, wherein a slider is attached to the inner surface of the inner support disk and has a pair of guide rails inwardly extending therefrom, wherein the guide rails are slidably carried in the guide grooves, wherein a guide shaft extends from a central portion of the outer surface, and an outer support disk having a side engagement opening and a central engagement hole, wherein the guide shaft of the slider is rotatably engaged in the central engagement hole, wherein each side end of the sun visor is fixedly received in the side engagement opening.

Abstract: Aqueous solutions of novel pyridone carboxylic acid compounds and esters or salts thereof having powerful antibacterial activities against both gram-negative and gram-positive bacteria, and in particular both ready-to-use injection and/or infusion solutions and dosage forms which can be converted into such injection and/or infusion solutions before use are disclosed.

Abstract: Pyridone carboxylic acid compounds or physiologically hydrolyzable esters thereof are provided which are represented by the formula: ##STR1## wherein R.sub.1 is a lower alkyl, a halogen-substituted lower alkyl, a lower alkenyl, a cycloalkyl, or a substituted- or unsubstituted-phenyl group; R.sub.2 is a hydrogen atom, or a lower alkyl or an amino group; A is a nitrogen atom or the group C-X wherein X is a hydrogen or a halogen atom, or an alkoxy group; and Z is a group having the formula: ##STR2## wherein n is 1 or 2; R.sub.3 and R.sub.4 each represent a hydrogen atom or a lower alkyl group, with proviso that, if n is 2, one of R.sub.3 and R.sub.4 is a hydrogen atom; R.sub.5 and R.sub.6 each represent a hydrogen atom, or a hydroxy, a lower alkoxy or an amino group which is unsubstituted or substituted by a lower alkyl group, with proviso that one of R.sub.5 and R.sub.6 is a hydrogen atom; and R.sub.7 is a hydrogen atom or a lower alkyl group.