Abstract: Antibacterial cephalosporins of the following formula: ##STR1## WHEREIN A and B each is a hydrogen or an amino protecting group; X is a hydroxy or a carboxy protecting group; Y is a hydrogen, halogen, alkyl, alkoxy, or an alkylthio; R is a hydrogen or an alkyl; Z is a group of the formula ##STR2## (in which R.sup.1 and R.sup.2 are the same or different and are a hydrogen, optionally substituted hydrocarbon group, organic acyl, or a group of the formula ##STR3## respectively, in which M and M' are the same or different and are an oxygen or sulfur; R.sup.3 is a hydrocarbon group; R.sup.1 and R.sup.2 can be combined together directly or through a hetero atom); m is 0 or 1; and the broken line shows the presence of a double bond at position 2 or 3, preparable from the compounds shown by the above formula in which Z is an oxygen by treatment with a compound shown by the formula H.sub.2 Z; and pharmaceuticals containing these compounds.

Abstract: A bearing assembly comprising a plurality of outer and inner rings individually having eccentric outer and inner circumferential axes. The rings are disposed successively one inside the other in a manner such that an inner ring slidably rotatably contacts about its outer circumference the inner circumference of its immediately outer ring, and are relatively rotated to easily adjust to bring the axis position of a shaft to be rotatably supported by the bearing precisely to a predetermined reference position. Means is also disclosed, which releasably holds the rings against rotation after the axis position of the shaft is fixed.

Abstract: Antibacterial cephalosporin compounds of the following formula: ##STR1## wherein A and B each is a hydrogen, organic or inorganic acyl, or A and B combined together are a diacyl group derived from a polybasic acid; Y is a hydrogen or methoxy; R is a hydrogen or lower alkyl; R' is a hydrogen, alkali metal, organic base group or easily removable protecting group; m is 0 or 1; Z is an optionally substituted guanylhydrazono group, preparable from the corresponding oxo compound or its reactive derivative by reacting with a guanylhyrazine of the formula H.sub.2 Z or its reactive derivative, or by some other reactions.