Abstract: A method of separating fluid into two or more separable fractions. One container section (2) and the adjacent portion of the other container section are made of solid material, and the two container sections are screwed together. The container sections (1 and 2) have their respective chambers (29 and 30) for receiving their respective fluid ingredients, and these chambers are interconnected through a connecting channel (31) through the abutting portions, at which the container sections (1 and 2) are screwed together. A valve seat (21, 27) is shaped at each end of the connecting channel (31) for each valve member (22, 16) for a sealing closing of the chambers (29, 30) in the separated state of the container sections (1, 2).

Abstract: Angiotensin converting enzyme activity is inhibited by compounds having the formula ##STR1## and salts thereof wherein R.sub.1 is alkyl, aryl, arylalkyl, cycloalkyl, or cycloalkyl(alkyl);R.sub.2 and R.sub.4 each is independently hydrogen, alkyl, arylalkyl or ##STR2## wherein X is hydrogen, alkyl, or phenyl and Y is hydrogen, alkyl, phenyl or alkoxy, or together X and Y are --(CH.sub.2).sub.2 --, --(CH.sub.2).sub.3 --, --CH.dbd.CH--or ##STR3## R.sub.3 is hydrogen or alkyl; ##STR4## is a residue of an amino acid selected from the group consisting of glycine, alanine, valine, norvaline, leucine, N-methylleucine, norleucine, isoleucine, phenylalanine, tyrosine, serine, threonine, cysteine, methionine, aspartic acid, glutamic acid, arginine, lysine, asparagine, glutamine, histidine, or tryptophane; andn is 0 or 1.