Shea nut (Vitellaria paradoxa) meal as a feed ingredient for poultry

References

• ADEGBOLA, A.A. (1977) Utilisation of agro-industrial by-products in Africa. In: New Food Resources. Proceedings of a Technical Consultation held in Rome, 22–24 November 1976. FAO Animal Production and Health Paper, No. 4: 147–161.
   Google Scholar
• ADEOGUN, W.O. (1989) Sheabutter cake as an ingredient in broiler chick rations. M.Sc. Thesis, Department of Animal Science, University of Ibadan, Nigeria.
   Google Scholar
• ADU-AMPOMAH, Y., AMPONSAH, J.D. and YIDANA, J.A. (1995) Collecting germplasm of shea nut (Vitellaria paradoxa) in Ghana. Plant Genetic Resources Newsletter 102: 37–38.
   Google Scholar
• AHMED, A.E., SMITHARD, R. and ELLIS, M. (1991) Activities of enzymes of the pancreas, and the lumen and mucosa of the small intestine in growing broiler cockerels fed tannin-containing diets. British Journal of Nutrition 65: 189–197.
   PubMed Web of Science ®Google Scholar
• ANNONGU, A.A., TERMEULEN, U. and ATTEH, J.O. (1996a) Response of broilers to dietary treated and untreated sheabutter cake supplemented with molasses. Landbauforschung Volkenrode, Sonderheft 169: 295–300.
   Google Scholar
• ANNONGU, A.A., TERMEULEN, U., ATTEH, J.O. and APATA, D.F. (1996b) Toxicological assessment of native and industrial fermented sheabutter cake in nutrition of broilers. Archiv fur Geflugelkunde 60: 221–226.
   Google Scholar
• ANNONGU, A.A., TERMEULEN, U., ATTEH, J.O. and CHINNAH, T. (1996c) Biochemical and histological alterations in the liver of the broiler after ingestion of vegetable saponins and effects of dietary supplementation with adsorbents or methyl donor. Archiv fur Geflugelkunde 60 (6): 267–272.
   Google Scholar
• ASSOCIATION OF OFFICIAL ANALYTICAL CHEMISTS, AOAC (1984) Official methods of analysis (14th Ed.). Association of Official Analytical Chemists, Washington, D.C.
   Google Scholar
• ARMSTRONG, W.D., ROGLER, J.C. and FEATHERSTON, W.R. (1974) Effects of tannin extraction on the performance of chicks fed bird resistant sorghum grain diets. Poultry Science 53: 714–720.
   Web of Science ®Google Scholar
• AYE, F.Y.O. and ADOMAKO, D. (1989) Processing of shea fruits. Cocoa Research Institute, Ghana, Annual Report 1987/1988: 104–105.
   Google Scholar
• ATUAHENE, C.C., DONKOH, A. and ASANTE, F. (1998) Value of sheanut cake as a dietary ingredient for broiler chicken. Animal Feed Science and Technology 72:133–142.
   Web of Science ®Google Scholar
• BADIFU, G.I.O. (1989) Lipid composition of Nigerian Butyrospermum paradoxum kernel. Journal of Food Composition and Analysis 2(3): 238–244.
   Google Scholar
• BALLESTA, M.C., MANAS, M., MATAIX, F.J., MARTINEZ-VICTORIA, E. and SEQUER, I. (1990) Long-term adaptation of pancreatic response by dogs to dietary fats of different degrees of saturation: olive and sunflower oil. British Journal of Nutrition 64: 487–496.
   PubMed Web of Science ®Google Scholar
• BHAT, T.K., SINGH, B. and SHARMA, O.P. (1998) Microbial degradation of tannins – A current perspective. Biodegradation 9: 343–357.
   PubMed Web of Science ®Google Scholar
• BRINK, E.J., HADDERMAN, E., DE FOUW, N.J. and WESTSTRATE, J.A. (1995) Positional distribution of stearic acid and oleic acid in a triacyglycerol and dietary calcium concentration determines the apparent absorption of these fatty acids in rats. Journal of Nutrition 125: 2379–2387.
   PubMed Web of Science ®Google Scholar
• BUSSON, I. (1965) Plantes alimentaires de l'Ouest Africain: étude botanique, bioloque et chemique, 568 pp., Leconte, Marseilles.
   Google Scholar
• BUTLER, L.G. and ROGLER, J.C. (1992) Biochemical mechanisms of the anti-nutritional effects of tannins. American Chemical Society Symposium Series 506: 298–304.
   Google Scholar
• CAMPBELL, G.L., CLASSEN, H.L. and BALANCE, G.M. (1986) Gamma irradiation treatment of cereal grains for chick diets. Journal of Nutrition 116: 560–569.
   PubMed Web of Science ®Google Scholar
• CAMPBELL, G.L., SOSULSKI, F.W., CLASSEN, H.L. and BALANCE, G.M. (1987) Nutritive value of irradiated and β-glucanase-treated wild oat groats (Avena fatua L.) for broiler chickens. Animal Feed Science and Technology 16: 243–252.
   Web of Science ®Google Scholar
• CARRÉ, B. (2002) Carbohydrate chemistry of feedstuffs used for poultry. In: Poultry Feedstuffs: Supply, Composition and Nutritive Value (eds. J.M. McNab and K.N. Boorman). CAB International, UK, p. 39–56.
   Google Scholar
• CERA, K.R., MAHAN, D.C., CROSS, R.F., REINHART, G.A. and WHITMOYER, R.E. (1988) Effect of age, weaning and postweaning diet on small intestinal growth and jejunal morphology in young swine. Journal of Animal Science 66: 574–584.
   PubMed Web of Science ®Google Scholar
• CHEEKE, P.R. (1971) Nutritional and physiological implication of saponins: a review. Canadian Journal of Science 51: 621–632.
   Google Scholar
• CLARKE, E.G.C. and CLARKE, M.L. (1979) Veterinary Toxicology, p. 438. Bailliere Tindale, London.
   Google Scholar
• CORTINAS, L., VILLVERDE, C., GALOBART, J., BAUCELLS, M.D., CODONY, R. and BARROETA, A.C. (2004) Fatty acid content in chicken thigh and breast as affected by dietary polyunsaturation level. Poultry Science 83: 1155–1164.
   PubMed Web of Science ®Google Scholar
• DE BRUYNE, T., PIETERS, L., DEELSTRA, H. and VLIETINCK, A. (1999) Condensed vegetable tannins: biodiversity in structure and biological activities. Biochemical Systematics and Ecology 27: 445–459.
   Web of Science ®Google Scholar
• DEI, H.K., ROSE, S.P. and MACKENZIE, A.M. (2006) Apparent metabolisable energy and digestibility of shea (Vitellaria paradoxa) fat, cocoa (Theobroma cacao) fat and soybean oil in broiler chicks. British Poultry Science 47: 1–6.
   Web of Science ®Google Scholar
• DEI, H.K., ROSE, S.P. and MACKENZIE, A.M. (2007) Metabolisable energy of shea nut (Vitellaria paradoxa) meal for poultry. British Poultry Abstracts 3: 36–37.
   Google Scholar
• DELAUDE, C. (1974) Chemical study of the saponins of Sapindacaea. Identification of the saponin of Radikofera calodendra. Bulletin of the Society off Research Scientists Liege 43: 693–696.
   Google Scholar
• ELKIN, R.G. (2002) Nutritional components of feedstuffs: a qualitative chemical appraisal of protein. In: Poultry Feedstuffs: Supply, Composition and Nutritive Value (eds. J.M. McNab and K.N. Boorman). CAB International, UK. p. 57–86.
   Google Scholar
• FORD, J.E. and HEWITT, D. (1979) Protein quality in cereals and pulses. 3. Bioassays with rats and chickens on sorghum (Sorghum vulgare Pers.), barley and field beans (Vicia faba L.). Influence of polyethylene glycol on digestibility of the protein in high tannin grain. British Journal of Nutrition 43: 325–340.
   Web of Science ®Google Scholar
• FRANCIS, G., KEREM, Z., MAKKER, H.P.S. and BECKER, K. (2002) The biological action of saponins in animal systems: a review. British Journal of Nutrition 88 (6): 587–605.
   PubMed Web of Science ®Google Scholar
• FREEMAN, C.P. (1969) Properties of fatty acids in dispersions of emulsified lipid and bile salt and the significance of these properties in fat absorption in the pig and the sheep. British Journal of Nutrition 23: 249–263.
   PubMed Web of Science ®Google Scholar
• GOHL, B. (1981) Tropical Feeds: feed information summaries and nutritive values. FAO Animal Production and Health Series, No. 12, 529 pp.
   Google Scholar
• HAGERMAN, A.E. (1988) Extraction of tannins from fresh preserved leaves. Journal of Chemistry and Ecology 40: 453–461.
   Web of Science ®Google Scholar
• HALL, J.B., AEBISCHER, D.P., TOMLINSON, H.F., OSEI-AMANING, E. and HINDLE, J.R. (1996) Vitellaria paradoxa: a monograph. School of Agricultural and Forest Sciences Publication No. 8, University of Wales, Bangor. 105 pp.
   Google Scholar
• HARALAMPIDIS, K., TROJANOWSKA, M. and OSBOURN, A. (2002) Biosynthesis of triterpenoid saponins in plants. In: Advances in Biochemical Engineering/Biotechnology (T. Scheper Ed.) 75: 31–47.
   Google Scholar
• HURRELL, R.F. (1990) Influence of the Maillard Reaction on nutritional value of foods. In: The Maillard Reaction in foods processing, human nutrition and physiology, pp 245–358. Birkhauser Verlag, Basel, Switzerland.
   Google Scholar
• HUYGHEBAERT, G., DE MUNTER, G. and DE GROOTE, G. (1988) The metabolisable energy of fats for broilers in relation to their chemical composition. Animal Feed Science and Technology 20: 45–58.
   Web of Science ®Google Scholar
• IJI, P.A., KHUMALO, K., SLIPPERS, S. and GOUS, R.M. (2004) Intestinal function and body growth of broiler chickens on maize-based diets supplemented with mimosa tannins and microbial enzyme. Journal of the Science of Food and Agriculture 84 (12): 1451–1458.
   Web of Science ®Google Scholar
• INRA (2004) Tables of composition and nutritional value of feed materials, 2 ed. (Sauvant, D., Perez, J.M. and Tran, G. eds.), p. 186. Wageningen Academic Publishers, Netherlands.
   Google Scholar
• JENKINS, K.J. and ATWAL, A.S. (1994) Effects of dietary saponins on fecal bile acids and neutral sterols, and availability of vitamins A and E in the chick. Journal of Nutritional Biochemistry 5: 134–138.
   Web of Science ®Google Scholar
• JOHNSON, I.T., GEE, J.M., PRICE, K.R., CURL, C. and FENWICK, G.R. (1986) Influence of saponins on gut permeability and active nutrient transport in vitro. Journal of Nutrition 116:2270–2277.
   PubMed Web of Science ®Google Scholar
• JONES, D.E. (1965) Banana tannin and its reaction with polyethylene glycol. Nature 206: 299–300.
   Web of Science ®Google Scholar
• JONES, W.T. and MANGAN, J.L. (1977) Complexes of the condensed tannins of sainfoin (Orobrychis viciifolia Scop) with fraction 1 leaf protein and with submaxillary mucoprotein, and their reversal by polyethylene glycol and Ph. Journal of the Science of Food and Agriculture 28: 126–136.
   Web of Science ®Google Scholar
• KERSHAW, S.J. and HARDWICK, J.F. (1981) Heterogeneity within commercial contract analysis samples of shea nut. Journal of the American Oil Chemists' Society 58: 706–710.
   Web of Science ®Google Scholar
• KETELS, E. and DE GROOTE, G. (1989) Effect of ratio of unsaturated to saturated fatty acids of the dietary lipid fraction on utilisation and metabolisable energy of added fats in young chicks. Poultry Science 68: 1506–1512.
   PubMed Web of Science ®Google Scholar
• KHALIL, A.H. and ELADAWY, T.A. (1994) Isolation, Identification and toxicity of saponin from different legumes. Food Chemistry 50 (2): 197–201.
   Web of Science ®Google Scholar
• KUMAR, R. and SINGH, M. (1984) Tannins: Their adverse role in ruminant nutrition. Journal of Agricultural Food Chemistry 32: 447–453.
   Web of Science ®Google Scholar
• LANDAU, S., XUE, B., DVASH, L., FRIEDMAN, S. and MABJEESH, S.J. (2003) Polyethylene glycol, used to alleviate the negative effects of dietary tannins, can also serve as a marker of fecal output in goats. Small Ruminant Research 48: 37–43.
   Web of Science ®Google Scholar
• LAZANI, A., BONDIOLI, P., CAMURATI, F., CARDILLO, M., GASPAROLI, A., MARIANI, C. and FEDELI, E. (1984) Integral technology of fat extraction and meal production from sheanuts. Rivista italiana delle sostanze grasse 61: 375–383.
   Google Scholar
• LEAKEY, R.R.B. (1999) Potential for novel food products from agroforestry trees: a review. Food Chemistry 66: 1–14.
   Web of Science ®Google Scholar
• LIPP, M. and ANKLAM, E. (1998) Review of cocoa butter and alternative fats for use in chocolate-Part A. Compositional data. Food Chemistry 62:73–97.
   Web of Science ®Google Scholar
• LONGSTAFF, M. and MCNAB, J.M. (1991) The inhibitory effects of hull polysaccharides and tannins of field beans (Vicia faba L.) on the digestion of amino acids, starch and lipids and on digestive enzyme activities in young chicks. British Journal of Nutrition 65: 199–216.
   PubMed Web of Science ®Google Scholar
• LOSZNER, G. (1986) Die Bedeutung der sheabutter als Nahrungsmittel und Industrierohstoff. Beiträge zur Tropischen landwirtschaft und Veterinärmedizin 24 (1): 29–34.
   Google Scholar
• MACHAIAH, J.P., PEDNEKAR, M.D. and THOMAS, P. (1999) Reduction in flatulence factors in mung bean (Vigna radiate) using low-dose γ-irradiation. Journal of the Science of Food and Agriculture 79: 648–652.
   Web of Science ®Google Scholar
• MAHMOOD, S., KHAN, M.A., SARWAR, M. and NISA, M. (2006) Chemical treatments to reduce antinutritional factors in salseed (Shorea robusta) meal: Effect of nutrient digestibility in colostomized hens and intact broilers. Poultry Science 85: 2207–2215.
   Web of Science ®Google Scholar
• MARSMAN, G.J., GRUPPEN, H., VAN DER POEL, A.F. and LIENER, J.E. (1997) The effect of thermal processing and enzyme treatments of soybean meal on growth performance, ileal nutrient digestibilities, and chime characteristics in broiler chicks. Poultry Science 76: 864–872.
   PubMed Web of Science ®Google Scholar
• MATTSON, F.H., NOLEN, G.A. and WEBB, M.R. (1979) The absorbability by rats of various triglycerides of stearic and oleic acid and the effect of dietary calcium and magnesium. Journal of Nutrition 109: 1682–1687.
   PubMed Web of Science ®Google Scholar
• MCDONALD, P., EDWARDS, R.A., GREENHALGH, J.F.D. and MORGAN, C.A. (1995) Animal Nutrition, 5th edition, p.546–552. Pearson Education Ltd, Essex, UK.
   Google Scholar
• MILGATE, J. and ROBERTS, D.C.K. (1995) The nutritional and biological significance of saponins. Nutrition Research 15 (8): 1223–1249.
   Web of Science ®Google Scholar
• MORGAN, B. and TRINDER, H. (1980) The composition and nutritional value of some tropical and sub-tropical by-products. British Society of Animal Production Occasional Paper 3: 91–111.
   Google Scholar
• NELSON, T.S., STEPHENSON, E.L., BURGOS, A., FLOYD, J. and YORK, J.O. (1975) Effect of tannin content and dry matter on energy utilisation and average amino acid availability of hybrid sorghum grains. Poultry Science 54: 1620–1623.
   Web of Science ®Google Scholar
• NISSENIN, V.J., PEISKER, M. and LIEBERT, F. (1993) Feed treatment and enzyme addition in poultry feeds (in German). Kraftfutter 9: 364–367.
   Google Scholar
• OCKNER, R.K., PITTMAN, J.P. and YAGER, J.L. (1972) Differences in the intestinal absorption saturated and unsaturated fatty acids. Gastroenterology 62: 981–992.
   PubMed Web of Science ®Google Scholar
• OKAI, B.D. and BONSI, M.K.L. (1989) Sheanut cake as a substitute for maize in the diets of growing gilts. Journal of the University of Science and Technology 9:45–50.
   Google Scholar
• OKAI, D.B. (1990) Seedcake tried in Ghana. Pig International 20: 28.
   Google Scholar
• OKAI, D.B., TOPPS, J.H., ENGLISH, P. and TUAH, A.K. (1994) The growth performance and organ characteristics of rats fed diets containing sheanut cake (SNC) and groundnut skins (GNS). Ghana Journal of Biochemistry, Biotechnology and Molecular Biology 2: 37–43.
   Google Scholar
• OKAI, D.B., TOPPS, J.H., ENGLISH, P., TUAH, A.K. and OSAFO, E.L.K. (1995) The effects of processed sheanut cake and groundnut skins on the growth performance and organ characteristics of rats. Ghana Journal of Biochemistry, Biotechnology and Molecular Biology 3: 76–82.
   Google Scholar
• OLESZEK, W., NOWACKA, J., GEE, J.M., WORTLEY, G. and JOHNSON, I.T. (1994) Effects of some purified alfafa (Medicago sativa) saponins on transmural potential difference in mammalian small intestine. Journal of the Science of Food and Agriculture 65: 35–39.
   Web of Science ®Google Scholar
• OLOREDE, B.R. and LONGE, O.G. (1999) Growth, Nutrient retention, haematology and serum chemistry of pullet chicks fed shea butter cake in the humid tropics. Archive of Zootechnology 49: 441–444.
   Google Scholar
• OLOREDE, B.R., LONGE, O.G. and BABANTUNDE, G.M. (1999) Growth performance, organs measurement and economics of production of broiler chickens fed a high shea butter cake diet supplemented with fish meal or groundnut cake. International Journal of Animal Science 14: 203–207.
   Google Scholar
• OSEI-AMANING, E. (1993) Shea nut expeller cake utilisation: integrated livestock shea nut farming experiment. Cocoa Research Institute, Ghana, Annual Report 1989/1990: 148.
   Google Scholar
• OWUSU-DOMFEH, K. (1972) The future of cocoa and its by-products in feeding livestocks. Ghana Journal of Agricultural Science 5: 57–63.
   Google Scholar
• PARSONS, C.M., HATSIMOTO, K., WEDEKING, K.J., HAN, Y. and BAKER, D.H. (1992) Effect of overprocessing on availability of amino acids and energy in soya bean meal. Poultry Science 71: 133–140.
   Web of Science ®Google Scholar
• PECKHAM, M.C. (1984) Poisons and toxins. In: M.S. Hofstad, H.J. Barnes, B.W. Calnek, W.M. Reid and H.W. Jr. Yoder, Diseases of poultry, 8th ed., pp. 783–818, Iowa State University Press, Ames, Iowa, USA.
   Google Scholar
• PLAVNIK, I. and SKLAN, D. (1995) Nutritional effects of expansion and short time extrusion on feeds for broilers. Animal Feed Science and Technology 55: 247–251.
   Web of Science ®Google Scholar
• POTTER, S.M., JIMENEZ-FLORES, R., POLLACK, J., LONE, T.A. and BERBER-JIMENEZ, M.D. (1993) Protein saponin interaction and its influence on blood lipids. Journal of Agricultural and Food Chemistry 41: 1287–1291.
   Web of Science ®Google Scholar
• PRICE, M.L., BUTLER, L.G., FEATHERSTON, W.R. and ROGLER, J.C. (1978) Detoxification of high tannin sorghum grain. Nutrition Report International 17: 229–238.
   Google Scholar
• PRICE, K.R., JOHNSON, I.T. and FENWICK, G.R. (1987) The chemistry and biological significance of saponins in foods and feedstuffs. CRC Critical Reviews in Food Science and Nutrition 26: 27–135.
   Google Scholar
• REDDY, N.R. and PIERSON, M.D. (1994) Reduction in antinutritional and toxic components in plant foods by fermentation. Food Research International 27: 281–290.
   Web of Science ®Google Scholar
• REED, J.D., HORVATH, P.J., ALLEN, M.S. and VAN SOEST, P.J. (1985) Gravimetric determination of soluble phenolics including tannins from leaves by precipitation with trivalent ytterbium. Journal of the Science of Food and Agriculture 36: 255–261.
   Web of Science ®Google Scholar
• REICHERT, R.D., FLEMING, E.S. and SCHWAB, D.J. (1980) Tannin deactivation and nutritional improvement of sorghum by anaerobic storage of H2O, HCL, NaOH-treated grain. Journal of Agricultural and Food Chemistry 28: 824–829.
   PubMed Web of Science ®Google Scholar
• RHULE, S.W.A. (1995) Evaluation of sheanut cake as feedstuff for pigs in Ghana.1. Growth rate and carcass characteristics of pigs fed diets containing varying levels of sheanut cake. Legon Agricultural and Extension Journal 4: 41–47.
   Google Scholar
• RHULE, S.W.A. (1999) Performance of pigs on diets containing detoxified sheanut cake. Tropical Animal Health and Production 31: 45–53.
   PubMed Web of Science ®Google Scholar
• ROSTAGNO, H.S., ROGLER, J.C. and FEATHERSTON, W.R. (1973) Studies on the nutritional value of sorghum grains with varying tannin contents for chicks: Amino acid digestibility studies. Poultry Science 52: 772–778.
   Web of Science ®Google Scholar
• SAWADOGO, K. and BEZARD, J. (1982) Etude de la structure glyceridique du beurre de karaté. Oléagineux 37 (2): 69–74.
   Google Scholar
• SHIMOYAMADA, M., IKEDO, S., OOTSUBO, R. and WATANABE, K. (1998) Effects of soybean saponins on chymotryptic hydrolyses of soybean proteins. Journal of Agricultural and Food Chemistry 46: 4793–4797.
   Web of Science ®Google Scholar
• SIDDHURAJU, P., OSONIYI, O., MAKKAR, H.P.S. and BECKER, K. (2002) Effect of soaking and ionising radiation on various antinutritional factors of seeds from different species of an unconventional legume, Sesbania and common legume, green gram (Vigna radiata). Food Chemistry 79: 273–281.
   Web of Science ®Google Scholar
• SILANIKOVE, N., PEREVOLOSKY, A. and PROVENZA, F.D. (2001) Use of tannin-binding chemicals to assay for tannins and their negative postingestive effects in ruminants. Animal Feed Science and Technology 91: 69–81.
   Web of Science ®Google Scholar
• SILVERSIDES, F.G. and BEDFORD, M.R. (1999) Soluble non-starch polysaccharides, enzymes, and gut viscosity – Is there a connection? World Poultry 15 (3): 17–18.
   Google Scholar
• SIM, J.S., KITTS, W.D. and BRAGG, D.B. (1984) Effect of dietary saponin on egg cholesterol level and laying hen performance. Canadian Journal of Animal Science 64: 977–984.
   Web of Science ®Google Scholar
• SMULIKOWSKA, S., PASTUSZEWSKA, B., SWIECH, E., OCHTABINSKA A., MIECZKOWSKA, A., NGUYEN, V.C. and BURACZEWSKA, K. (2001) Tannin content affects negatively nutritive value of pea for monogastrics. Journal of Animal and Feed Sciences 10 (3): 511–523.
   Web of Science ®Google Scholar
• SPARG, S.G., LIGHT, M.E. and VAN STADEN (2004) Biological activities and distribution of plant saponins. Journal of Ethnopharmacology 94: 219–243.
   PubMed Web of Science ®Google Scholar
• STRACHAN, T.R. and BENNETTI, A. (1994) Theobromine poisoning in dogs. Veterinary Record 134: 284–289.
   PubMed Web of Science ®Google Scholar
• TANO-DEBRAH, K. and OHTA, Y. (1994) Enzyme-assisted aqueous extraction of fat from kernels of the shea tree, Butyrospermum parkii. Journal of the American Oil Chemists' Society 71(9): 979–983.
   Web of Science ®Google Scholar
• TERAPUNDUWAT, S. and TASAKI, I. (1986) Effect of dietary saponin on the performance and plasma cholesterol level of chicks and the alleviation of saponin toxicity by cholesterol supplementation. Japanese Journal of Zootechnical Science 57: 524–533.
   Google Scholar
• TREASE, G.E. and EVANS, W.C. (1972) Pharmacognosy, 10th edition, pp. 502. Bailliere Tindall, London.
   Google Scholar
• TREVINO, J., ORTIZ, L. and CENTENO, C. (1992) Effect of tannins from Faba beans (Vicia faba) on the digestion of starch by growing chicks. Animal Feed Science and Technology 37: 345–349.
   Web of Science ®Google Scholar
• VILA, B. and ESTEVE-GARCIA, E. (1996) Studies on acid oils and fatty acids for chickens. II. Effect of free fatty acid content and degree of saturation of free fatty acids and neutral fat on fatty acid digestibility. British Poultry Science 37: 119–130.
   PubMed Web of Science ®Google Scholar
• WATANABE, M., SUMIDA, N., YANAI, K. and MURAKAMI, T. (2004) A novel saponin hydrolase from Neocosmopora vasinfecta var. vasinfecta. Applied and Environmental Microbiology 70 (2): 865–872.
   Web of Science ®Google Scholar
• WILLIAMS, P.E.V., GERAERT, P.A., UZU, G. and ANNISON, G. (1997) Factors affecting non-starch polysaccharide digestibility in poultry. In: Morand-Fehr, P. (ed.). Feed manufacturing in Southern Europe: New challenges, p. 125–134. CIHEAM-IAMZ, Zaragoza.
   Google Scholar
• WISEMAN, J., COLE, D.J.A., PERRY, F.G., VERNON, B.G. and COOKE, B.C. (1986) Apparent metabolisable energy values of fats for broiler chicks. British Poultry Science 27: 561–576.
   PubMed Web of Science ®Google Scholar
• WISEMAN, J. and SALVADOR, F. (1991) The influence of free fatty acid content and degree of saturation on the apparent metabolisable energy value of fats fed to broilers. Poultry Science 70: 573–582.
   PubMed Web of Science ®Google Scholar
• WOMENI, H.M., KAMGA, R., TCHIEGANG, C. and KAPSEU, C. (2002) Extraction du beurre de karaté: influence du séchage des amandes et de la technique d'extraction. Rivista Italiana delle Sostanze Grasse 79(1/2): 33–37.
   Google Scholar
• WUBBEN, J.P., PRICE, K.R., DANIELS, M.J. and OSBOURN, A.E. (1996) Detoxification of oat leaf saponins by Septoria avenae. Phytopathology 86 (9): 986–992.
   Web of Science ®Google Scholar
• YOSIOKA, I., FUJIO, M., OSAMURA, M. and KITAGAWA, I. (1966) A novel cleavage method of saponin with soil bacteria intending to the genuine sapogenin on Senega and Parax saponins. Tetrahedron Letters 50: 6303–6308.
   Google Scholar
• ZANELLA, I., SAKOMURA, N.K., SILVERSIDES, F.G., FIQUEIDO, A. and PACK, M. (1999) Effect of enzyme supplementation of broiler diets based on corn and soybeans. Poultry Science 78: 561–568.
   PubMed Web of Science ®Google Scholar
• ZOLLITSCH, W., KNAUS, W., AICHINGER, F. and LETTNER, F. (1997) Effects of different dietary fat sources on performance and carcass characteristics of broilers. Animal Feed Science and Technology 66 (1/4): 63–73.
   Web of Science ®Google Scholar