Abstract: Drug compositions comprised of therapeutically effective amounts of at least one compound selected from the group consisting of:DHA esterified in the form of lysophosphatidyl-choline (lyso-PCDHA) in position sn-2;DHA-phosphatidylcholines (PCDHAs) in which DHA is esterified in position sn-2 and which have an acyl group of [very short length] 2 to 6 carbon atoms in position sn-1;and triglycerides in which DHA is esterified in position sn-2 and which have acyl groups of [very short length] 2 to 6 carbon atoms in positions sn-1 and sn-3.

Abstract: The invention relates to a biocompatible, bioresorbable and non-toxic adhesive composition for surgical use, for the bonding, in particular, of biological tissues to one another or in an implanted biomaterial, characterized in that it comprises a reactive acidic solution of non-crosslinked and potentially crosslinkable collagen or gelatin modified by oxidative cleavage, at a concentration which is preferably between approximately 5 and 30 by weight. It also relates to reactive acidic solutions and powders based on non-crosslinked collagen or gelatin modified by oxidative cleavage which are used as intermediate products in the preparation of the above-mentioned composition, and to the process for their preparation. It also relates to adhesive kits which comprise, on the one hand, the above-mentioned reactive acidic solution and, on the other hand, a neutralizing solution and which are intended for extemporaneous mixing.

Abstract: The invention relates to an adhesive, biocompatible, biodegradable and non-toxic composition for surgical use, in particular for binding tissues, which composition is of the following general formula: ##STR1## in which: R is a hydrocarbon chain containing from 1 to 50 carbon atoms,R.sub.1 and R.sub.2 are identical or different and are chosen from the following groups: ##STR2## R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.

Abstract: Human or animal placenta is subjected to moderate enzymatic digestion, in particular with pepsin at an acid pH, then, after separation of the residual tissue the impurities are separated at a moderately acid pH, the collagen is precipitated at a neutral pH, redissolved and the residual impurities precipitated at an acid pH. The collagen obtained can be brought back to a neutral pH and dried in the form of fibres. Completely transparent, physiological and hemocompatible gels and solutions can be prepared. Applications for the fabrication of contact lenses and implants.

Abstract: A patch for visceral surgery is made from a biomaterial consisting of two layers of collagen superimposed and closely combined, namely a porous adhesive layer of fibrous collagen and a film of collagen and/or gelatin.

Abstract: A process for pigments such as the treatment of proteinic solutions containing heminic groups or chlorophylls in view of their decolorization, and products thus obtained.The proteinic solution is subjected in a first step, to a slight enzymatic hydrolysis, preferably with acid pH pepsin, and the partially hydrolyzed solution is then brought to a temperature above 60.degree. C., at an acid pH between 2 and 4.

Abstract: Collagen is submitted to a controlled oxidation by treatment with a solution of periodic acid or of a periodate, notably of sodium. Application to gels, implants, lenses, films, spheres, etc., of collagen.