Abstract: A security system suitable for monitoring the presence of the occupants of a vessel such as a sailing yacht has two receivers at fixed locations on the yacht for receiving signals from one of a number of transmitters each worn by a respective crew member. The receivers are connected to a detector having a comparator triggered when a predetermined relative signal strength is generated by the receivers indicating the presence of a transmitter in an "unsafe" region acting to cause triggering of an alarm and automatic ejection of a life buoy or other life saving equipment.

Abstract: Di(D-tryptophyl and/or tetrahydropyridoindolylcarbonyl)-containing peptide amides useful as Substance P agonists and/or antagonists and as antihypertensives and/or analgesics and a process for preparing them are disclosed.

Abstract: A genus of tripeptide amides and fifteen species thereof of Examples 4-18, which are useful as analgesics and/or opiate antagonists, three processes for preparation thereof, pharmaceutical compositions thereof, and the three tripeptide amide species of Examples 1-3, which are not within the genus and are useful as analgesics and/or opiate antagonists, are disclosed.

Abstract: A genus of dipeptide amides including as the preferred subgenus the dipeptide amides having the structural formula R.sub.1 TyrR.sub.2 D-AlaNHR.sub.4 wherein R.sub.1 and R.sub.2 are each hydrogen or alkyl provided that at least one of them is other than hydrogen and R.sub.4 is phenylalkyl or substituted-phenylalkyl are prepared by condensing the dipeptide with the amine or the amino acid with the amino acid amide and are useful as analgesics.

Abstract: A genus of dipeptide amides including as the preferred subgenus the dipeptide amides having the structural formula HTyrD-AlaNR.sub.2 R.sub.3 wherein R.sub.2 is phenylalkyl or substituted-phenylalkyl and R.sub.3 is hydrogen, alkyl, phenylalkyl, substituted-phenylalkyl or X-alkyl wherein X is an electronegative moiety are prepared by condensing the dipeptide with the amine or the amino acid with the amino acid amide and are useful as analgesics.

Abstract: N-Terminal L-prolyl or D-prolyl hexapeptide amides useful as Substance P agonists and/or antagonists and as analgesics and/or antihypertensives and a process for preparing them are disclosed.

Abstract: A genus of dipeptide amides including as the preferred subgenus the dipeptide amides having the structural formula R.sub.1 TyrR.sub.2 D-Q-NR.sub.4 R.sub.5 wherein Q is Met, Met(O), Gln or Ser, R.sub.1 and R.sub.2 are each hydrogen or alkyl, R.sub.4 is phenylalkyl or substituted-phenylalkyl and R.sub.5 is hydrogen, alkyl, phenylalkyl, substituted-phenylalkyl or X-alkyl wherein X is an electronegative group are prepared by condensing the dipeptide with the amine or the amino acid with the amino acid amide and are useful as analgesics.

Abstract: A genus of dipeptide amides including as the preferred subgenus the dipeptide amides having the structural formula R.sub.1 TyrProNR.sub.4 R.sub.5 wherein R.sub.1 is hydrogen or alkyl, R.sub.4 is phenylalkyl or substituted-phenylalkyl and R.sub.5 is hydrogen, alkyl, phenylalkyl or substituted-phenylalkyl are prepared by condensing the dipeptide with the amine or the amino acid with the amino acid amide and are useful as analgesics.

Abstract: Tetrapeptide amides of the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, A and B represent certain specified substituent groups and where n is 2-5, p is 1-5 and r is 1 or 2. The compounds exhibit pharmacological activity when tested in the transmurally stimulating guinea pig ileum preparation indicating their affinity for opiate receptor sites and they may therefore be used in man for those conditions where an opiate-like effect is indicated.

Abstract: Tetrapeptide amides of the formula ##STR1## wherein R.sup.1, R.sup.8, R.sup.x, B and D represent certain specified substituent groups. The compounds exhibit pharmacological activity when tested in vitro in the transmurally stimulated guinea pig ileum preparation indicating their affinity for opiate receptor sites, and also in vivo tests, with intravenous administration, indicating their analgesic effects, and hence their utility as analgesic agents.

Abstract: Compounds of the formula ##STR1## wherein R, R.sup.1, R.sup.2, R.sup.3 and R.sup.4 represent certain specified substituent groups. The compounds exhibit activity in the reserpine induced hypothermia test.