Abstract: A method for treating the skin and/or scalp of a human host by the administration of a melatonin composition in order to improve the cosmetic or physical appearance of the skin and/or scalp, and the compositions therefore.

Abstract: The cell of a gas-tight alkaline battery is balanced by subdividing the negative excess capacity into the necessary charge and discharge reserves by individually treating the two electrode polarities prior to their assembly, while avoiding open cell forming. When combining a charged, dried, positive sintered electrode which is suitable for storage with a negative electro-deposited electrode, the latter inherently receives a charge reserve due to partial chemical oxidation with H.sub.2 O.sub.2 l or K.sub.2 S.sub.2 O.sub.8. When a discharged, but preformed positive sintered electrode is combined with a negative sintered electrode, the latter is electrochemically partially charged to the extent necessary to achieve the desired discharge reserve, and thereafter preserved by immersion in a solution containing sulfuric acid, and possibly CdSO.sub.4.

Abstract: A coating for imparting corrosion, temperature and abrasion resistant properties to a part including at least one layer of metal particles bonded in a substantially water-insoluble material and, adhered thereto, a flame sprayed metal or metalloid oxide layer, and the article formed thereby.

Abstract: Biological compositions which induce sleep of the slow-wave type which comprise biological carriers and sleep-inducing muramyl peptides such as acetylmuramyl-L-alanyl-D-isoglutamine and derivatives thereof and methods of using such compositions.

Abstract: The compounds have the structure 2-(2-amino or alkyl-amido-2-desoxy-3-O-D-glucopyranosyl)-alkanyl-dipeptide, possibly substituted on the saccharide residue the amino acid residue at the end of the peptide chain being a D-glutamyl residue whose .alpha.-carboxy function is esterified and .gamma.-carboxyl function amidated. The compounds are valuable as immunological medicaments.

Abstract: A boring head is retained to a connecting shaft by means of a cylindrical fastening spigot, using a retaining screw with a conical end which engages a conical transverse bore in the spigot such that the boring head is tightened by wedging effect against the connecting shaft. The fastening spigot is provided with a cylindrical transverse bore, at an approximate right angle to the conical transverse bore in the spigot, and a longitudinally displaceable drive pin is supported in the cylindrical transverse bore such that the ends penetrate, with slight play, into recesses in the connecting shaft. During the transmission of torque, the drive pin is automatically centered so that the forces developed are evenly distributed between the two ends of the drive pin, so that the device is particularly suitable for the transmission of high torques, whether of a gradually increasing or an impulse type, and is usable either with a clockwise or a counterclockwise movement.