ISSN 00142352 i ρ ca eur EURATOM AND EEC RESEARCH SCIENTIFIC AND TECHNICAL PUBLICATIONS AND PATENTS KOMMISSIONEN FOR DE EUROPÆISKE FÆLLESSKABER KOMMISSION DER EUROPAISCHEN GEMEINSCHAFTEN ΕΠΙΤΡΟΠΗ ΤΩΝ ΕΥΡΩΠΑΪΚΩΝ ΚΟΙΝΟΤΗΤΩΝ COMMISSION OF THE EUROPEAN COMMUNITIES N DES COMMUNAUTÉS EUROPÉENNES COMMISSIONE DELLE COMUNITÀ EUROPEE COMMISSIE VAN DE EUROPESE GEMEENSCHAPPEN \ / I H Pfc Kl λ voi. yINJ O 4Λ η ηιι A r\ ο Η /χΓ¡ιιι y Ο Ί ABSTRACTS: PUBLICATIONS 19/153 - 19/249 — PATENTS Ρ19/7 - Ρ19/10 EURO ABSTRACTS SECTION I is published by the OFFICE FOR OFFICIAL PUBLICATIONS OF THE EUROPEAN COMMUNITIES abstracting, editing, production and layout are carried out by the SCIENTIFIC DOCUMENTATION CENTRE LTD., DUNFERMLINE, SCOTLAND The following contributed to the production of the periodical in 197880: Editorial Staff :PETER S. DAVISON, BSc, PhD., ARIC, MllnfSc, EDITOR, Ralph Beer, FllnfSc, FlPetr., Consultant Editor, Valerie Traub, BSc, Cert EdfDundcc Coll)., Subeditor, Printing, Composing, Technical, Clerical Scientific Staff and Contributors:and Secretarial Staff & Contributors :/ Christine Anthony, BSc., Robert , BTech., Edna M.Barton, BSc, Anthony Busuttil, MD., MRCPath., Lucille Miller, Office Administrator, Elizabeth K. Cameron, BA., I so b el H ay, John Fletcher, BSc(Tech)., David MacPherson, Jaqueline Α. Geddes, BSc,Moira Lavery, William Houston, BSc, Rosemary Morris , Jean S. McCutcheon, BA., MSc, Marion Robb, MÅ.