Abstract: A product and process of making such product in which a varistor is formed by diffusing lead borosilicate-type glass, into a surface of a fired or sintered zinc oxide substrate, i.e., "varistor element," during formation of an electrode on the surface of the substrate. Typically, an electrode paste or material, comprising a mixture or lead borosilicate-type glass frit and Ag powder, is applied to the substrate and provides the lead borosilicate-type glass for diffusing into the substrate. The improvement is that the lead borosilicate-type glass frit for the electrode paste or material comprises a mixture of PbO, B.sub.2 O.sub.3, SiO.sub.

Abstract: The varistor element contains zinc-oxide as a main constituent and at least bismuth and antimony as accessory constituents. The content of bismuth in the form of Bi.sub.2 O.sub.3 is in a range from about 0.1 to 4.0 mol % and the content of antimony in the form of Sb.sub.2 O.sub.3 constitutes a mol-ratio of Sb.sub.2 O.sub.3 /Bi.sub.2 O.sub.3 less than or equal to about 1.0 mol %. These materials are mixed thoroughly and are pressed into a compact. After coating both sides of the compact with Ag or Ag--Pd paste, the compact and its electrodes are sintered simultaneously at a temperature of about 800.degree. C. to 960.degree. C.

Abstract: Antibiotic acmimycin of the formula ##STR1## is active against Gram positive and Gram negative bacteria. It is produced by culturing the microorganism Streptomyces sp. AC4559 FERM P-6445, and isolating the above compound from the cultured medium.