THE INFLUENCE OF SEASONAL CHANGES IN THE DETERMINATION OF SELENIUM IN LIVER OF VARIOUS ANIMALS BY NEUTRON ACTIVATION ANALYSIS AND HIGH-RESOLUTION GAMMA SPECTROMETRY.HARTHOORN AM; TURKSTRA J.1976; J. S. AFR. VETER. ASS.; S. AFR.; DA. 1976; VOL. 47; NO 3; PP. 183-186; BIBL. 12 REF.Article

NONDESTRUCTIVE DETERMINATION OF PLATINUM METALS IN ORES, MATTE, AND LEAD ASSAY BEADS BY REACTOR ACTIVATION ANALYSIS AND HIGH RESOLUTION GAMMA SPECTROMETRY.TURKSTRA J; PRETORIUS PJ; DE WET WJ et al.1970; ANAL. CHEM.; USA; 1970(7), VOL. 42, NUM. 0008, P. 835 A 841Miscellaneous

DIRECT DETERMINATION OF THE NOBLE METALS BY ACTIVATION ANALYSIS UTILIZING HIGH-RESOLUTION GAMMA SPECTROMETRY.DE WET WJ; TURKSTRA J; TOERIEN FVS et al.1971; ACT.ANAL. GEOCHEM. COSMOCHEM., ED. BRUNFELT. A., STEINES. E., UNIVERSITETSFORLAGET, OSLO.; 1971, P. 371 A 379Miscellaneous

NONDESTRUCTIVE NEUTRON ACTIVATION ANALYSIS OF SMALL SAMPLES OF WITWATERSRAND ORE FOR GOLD.DE LANGE PW; DE WET WJ; TURKSTRA J et al.1968; ANAL. CHEM.; USA; 1968(3), VOL. 40, NUM. 0002, P. 451 A 454Miscellaneous

A comparative study of essential biological trace elements in human tooth enamel and dentine obtained from different ethnic groups in South AfricaNGWENYA, M. P; TURKSTRA, J.Journal of trace and microprobe techniques. 1985, Vol 3, Num 1-2, pp 67-76, issn 0733-4680Article

THE CHARACTERIZATION OF THE CONCENTRATION LEVELS OF VARIOUS TRACE ELEMENTS IN LIVER TISSUE OF BLESBOK (DAMALISCUS DORCAS PHILLIPSI) AND BONTEBOK (DAMALISCUS DORCAS DORCAS), AS DETERMINED BY INSTRUMENTAL NEUTRON ACTIVATION ANALYSISTURKSTRA J; DE VOS V; BIDDLECOMBE F et al.1978; Z. TIERPHYSIOL. TIERERNAEHR. FUTTERMITTELKDE; DEU; DA. 1978; VOL. 40; NO 3; PP. 149-154; ABS. GERArticle

Mineral composition of teeth from South African population groups using modern instrumental techniquesFAKUDE, H. P. P; TURKSTRA, J.Journal of trace and microprobe techniques. 1991, Vol 9, Num 1, pp 33-47, issn 0733-4680, 15 p.Article

Highly immunogenic and fully synthetic peptide-carrier constructs targetting GnRHBEEKMAN, N. J. C. M; SCHAAPER, W. M. M; TURKSTRA, J. A et al.Vaccine. 1999, Vol 17, Num 15-16, pp 2043-2050, issn 0264-410XArticle

New GnRH-like peptide construct to optimize efficient immunocastration of male pigs by immunoneutralization of GnRHOONK, H. B; TURKSTRA, J. A; SCHAAPER, W. M. M et al.Vaccine. 1998, Vol 16, Num 11-12, pp 1074-1082, issn 0264-410XArticle

Efficient immunocastration of male piglets by immunoneutralization of GnRH using a new GnRH-like peptideMELOEN, R. H; TURKSTRA, J. A; LANKHOF, H et al.Vaccine. 1994, Vol 12, Num 8, pp 741-746, issn 0264-410XArticle

Active immunization against gonadotrophin-releasing hormone in Chinese male pigsZENG, X. Y; TURKSTRA, J. A; VAN DE WIEL, D. F. M et al.Reproduction in domestic animals (1990). 2001, Vol 36, Num 2, pp 101-105, issn 0936-6768Article