Abstract
Detoxification of cassava cultivars (30572 TMS and 30555 TMS) during their traditional methods of processing to produce gari and cassava flour has been investigated. The HCN quantitative determination was done using the enzymatic assay. Fermentation of cassava pulp for 96 hours during cassava processing for gari reduced the HCN by 22 ppm (52.4 percent) and 20 ppm (57.3 percent) for 30572 TMS and 30555 TMS respectively. There was no significant difference (P>0.05) in the HCN content of the two cultivars. Soaking of the sliced cassava tissue for 24 hours in cassava flour production prior to sundrying resulted in 16 ppm (38.1 percent) and 15 ppm (38.4 percent) HCN reduction for 30572 TMS and 30555 TMS respectively. HCN loss during sundrying was 6 ppm (14.3 percent) and 5 ppm (12.8 percent) for the two cultivars. There was significantly (P<0.05) higher HCN loss in processing of gari than cassava flour. The residual cyanide in gari was 12 ppm for 30572 TMS and 10 ppm for 30555 TMS and that in the flour was 20 ppm for 30572 and 19 ppm for 30555 TMS.
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References
Collard P, Levi S (1959) A two stage fermentation of cassava. Nature (London) 183: 620–621.
Cooke RD (1978) An enzymatic assay for total cynide content of cassava (Manihot Esculenta Crantz). J Science of Food and Agriculture 29: 345–352.
Cooke RD, Coursey DG (1987) Cassava — a major cyanide containing food crops. Edited by Venesland B, Conn EE, Knowles CJ, Westlen J and Wissing F. London: Academic Press, pp. 93–114.
Cooke RD, Richard JE, Thomson AK (1985) Nutritional aspects of cassava processing and storage in processing of the 7th symposium of the international society of tropical root crops, Guage Loupe, West Indies, July 1985.
Coursey DG (1973) Chronic cassava toxicology. Edited by Nestel B, Macintrye R. IDRC, Ottawa, Canada, pp. 27–36.
Gondwe ATD (1974) East African Agriculture, 140: p. 160 cited by Cooke and Maduagwu, 1978.
Ikediobi CO, Onyia GOC, Eluwa CE (1980) A rapid and inexpensive enzymatic assay for total cyanide in cassava and cassava products. J Agric Biochem 44: (12) 2803–2009.
Maduagwu EN, Oben DH (1981) Effects of processing of grated cassava roots by screw press and by traditional fermentation methods on the cyanide contents of gari. Food Technol 16: 299–302.
Nambisan B, Sunderson S (1985) Effects of processing on the cyanogenic glucoside content of cassava. J Science of Food and Agriculture 36: 1197–1203.
Okafor N (1977) Micro-organism associated with cassava fermentation for gari production. J Appl Bacteriol 42: 279–284.
Onwueme IC (1978) The tropical tuber crops. New York: John Wiley and Sons, pp. 105–108.
Oyenuga VA (1968) Nigerian's food and feeding stuff: their chemistry and nutritive values, 3rd edn. Ibadan: Ibadan University Press, pp 20–27.
Sokari TG, Karibo PS (1992) Changes in cassava toxicity during processing into gari and ijapu — two fermented food products. Food Additives and Contaminants 9: 379–384.
Sokari TG, Wachukwu CK (1993) Detoxification of ijapu a fermented cassava product similar to potato chips. Trop Sci 33: 145–151.
Vasconcelos TAT, Twiddy DR, West BA, Reily PJA (1990) Detoxification of cassava during gari preparation. Int J Food Sci & Tech 25: 198–203.
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Kemdirim, O.C., Chukwu, O.A. & Achinewhu, S.C. Effect of traditional processing of cassava on the cyanide content of gari and cassava flour. Plant Food Hum Nutr 48, 335–339 (1995). https://doi.org/10.1007/BF01088492
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DOI: https://doi.org/10.1007/BF01088492