Abstract: A method for determining the combined activity of two or more ingredients by impregnating a carrier with one ingredient and bringing it into contact with target material to create a zone of inhibition, then adding a second ingredient to the target material and bringing the carrier into contact with it to create a second zone of inhibition. The zones are then compared.

Abstract: A pharmacologically effective mixture of a polymyxin composition and a hop composition having a synergistic effect on bacteria greater than the antibacterial effect of those compositions administered separately.

Abstract: A method of killing protozoa comprises subjecting the protozoa to an effective amount of extract of the hop plant. Such protozoicidal effect is increased when the hop extract is further treated with carbon dioxide.

Abstract: The present invention relates to the discovery that hop extract is useful as an antibacterial agent against the dangerous pathogens Clostridium botulinum, Clostridium difficile, and Helicobacter pylori at levels below that at which a flavor from the acids contained therein is objectionable. More specifically, a process and associated product is described herein, comprising applying a solution of hop extract to a food, beverage or other medium so that the final concentration of hop ingredients is about 1 ppm or higher in order to inhibit the growth of Clostridium botulinum, Clostridium difficile, and/or Helicobacter pylori.

Abstract: A method for the production of isomerized hop preparation in which a hop extract is mixed with a solubilized alkaline and an alkaline earth metal salt, and the resulting mixture is subjected to a temperature of at least 70.degree. C. and a pH under 10 for a time sufficient to effect conversion of the alpha-acid in said hop extract into the iso-alpha acid.

Abstract: An improved process for the selective extraction of the alpha acids contents of hops using liquid carbon dioxide as solvent is described. Solubility of the alpha acids in liquid carbon dioxide is enhanced by addition of a minor amount of a selected organic substance which: (1) is non-reactive with the alpha acids of interest, and (2) has the following physical properties: (a) is completely soluble in liquid carbon dioxide in the operating conditions and concentrations employed, and (b) is itself a solvent for the alpha acids of interest. Preferably the organic substance is a 1 to 4 carbon atom aliphatic alcohol in an amount of about 0.1 to about 30 volume percent.

Abstract: There are provided new deodorant compositions which are suitable for application to human skin, the compositions comprising an extract of hops as an active anti-body odor ingredient which is present in an amount at least sufficient to provide bacteriostatic activity.

Abstract: There is provided a method of processing hops or hop extracts for brewing in which hops and particularly the alpha acids in the hops are stabilized against deterioration and light sensitivity, the process broadly comprising isomerizing a substantial portion of the alpha acids in the hops and contacting said iso-alpha acids witha metallic hydride compound, the metal thereof being suitable for use in foods, until the reaction is substantially completed. In another aspect, the alpha acids present in the hops are converted to their reduced isomerized products which are desirable for brewing. The process is especially suitable for use in pelletizing operations.

Abstract: There is provided a new method of treating human skin to protect said skin from erythema-producing sunlight radiation while promoting tanning thereof, the method comprising using an active sunscreening ingredient, an ultraviolet radiation absorbing extract of hops.