Abstract: Peptides of the formulaR.sub.1 --HX.sub.1 DX.sub.2 IX.sub.3 Iwherein R.sub.1, X.sub.1, X.sub.2 and X.sub.3 are defined as in the specification having antihypertensive activity without vascoconstricting activity.

Abstract: Sealing apparatus of wind boxes at both the ore charge and discharge sides of a Dwight-Lloyd sintering machine provides a plurality of seal members disposed in series in close contact with the bottom surface of pallets of the sintering machine, and a seal chamber communicating with a space provided between these seal members. The seal members are rotatable rolls having seal plates projectingly installed radially on the outer periphery thereof, and may be rolls with these seal plates held in close contact with the bottom surface of the pallets and the inner surface of the seal chamber, or may be flat seal plates with their flat surface firmly pressed against the bottom surface of the pallets. In the seal chamber is mounted an independent exhaust fan for the removal of air, further improving sealing performance.

Abstract: Novel syn isomers of reacemates and optical isomers of 3-amino-2-oxo-azetidine-1-sulfonic acids of the formula ##STR1## wherein R is difluoromethyl, R.sub.1 is --(CH.sub.2).sub.n --X, n is an integer from 1 to 4, X is selected from the group consisting of halogen, --CN, --OR.sub.1 ', --SR.sub.1 ", azido, thiocyanate, isothiocyanate, and ##STR2## R.sub.1 ' is selected from the group consisting of hydrogen and alkyl of 1 to 4 carbon atoms, R.sub.1 " is selected from the group consisting of hydrogen, alkyl of 1 to 4 carbon atoms and a heterocycle and R' and R" are individually selected from the group consisting of hydrogen and alkyl of 1 to 4 carbon atoms and taken together with the nitrogen to which they are attached form a heterocycle and A.sup.1 is selected from the group consisting of hydrogen, and metal cations and their nontoxic, pharmaceutically acceptable acid addition salts, the wavy line indicating the cis form, trans form or cis trans forms having antibiotic properties.

Abstract: A compound selected from the group consisting a compound of the formula ##STR1## wherein R.sub.1 is selected from the group consisting of phenyl, cycloalkyl of 4 to 6 carbon atoms and ##STR2## R.sub.4 and R.sub.5 are individually hydrogen or alkyl of 1 to 5 carbon atoms, R.sub.6 is selected from the group consisting of hydrogen, alkyl of 1 to 5 carbon atoms, phenyl, halogen, alkoxycarbonyl of 2 to 5 carbon atoms, cyano, amido and mono- and dialkylamido of 1 to 5 alkyl carbon atoms, R.sub.2 and R.sub.3 are individually selected from the group consisting of hydrogen, alkyl of 1 to 5 carbon atoms and cycloalkyl of 3 to 5 carbon atoms or taken together form alkylene of 3 to 5 carbon atoms, X and Y are individually selected form the group consisting of hydrogen, halogen, --NO.sub.2, azido, --CN, --CF.sub.