(19)

(11)

EP 0 094 413 A1

(12)

(43) Date of publication: 23.11.1983 Bulletin 1983/47 (21) Application number: 82903532.0 (22) Date of filing: 12.10.1982

(51) International Patent Classification (IPC):  G01N 29/ 02( . ) (86) International application number: PCT/US1982/001456 (87) International publication number: WO 1983/001511 (28.04.1983 Gazette 1983/10)

(84) Designated Contracting States: AT BE CH DE FR GB LI LU NL SE (30) Priority: 13.10.1981 US 19810310824 (71) Applicant: BOARD OF TRUSTEES OF THE UNIVERSITY OF MAINE Bangor, ME 04401 (US)	(72) Inventors: LEE, Donald L. Orono, ME 04473 (US) VETELINO, John F. Veazie, ME 04401 (US)