BACKGROUND: Orange-fleshed sweetpotato (OFSP) can be used to tackle vitamin A deficiency, a major public health problem in most developing countries. In East Africa, common ways of using sweetpotato include drying and subsequent storage. The aim of the study was to investigate the impact of drying and storage on the total carotenoid retention (as an estimate of provitamin A retention) from OFSP. RESULTS: Losses of total carotenoid during drying were generally low (15% or less). Total carotenoid retention in OFSP was not dependent on the type of dryer (solar or sun). Sweetpotato cultivar (Ejumula, Kakamega, SPK004/1, SPK004/1/1, SPK004/6 or SPK004/6/6) had a significant effect on retention in drying (P < 0.05). High percentage losses of total carotenoids were, however, correlated with high moisture content and high carotenoid content in fresh sweetpotato roots. After 4 months' storage at room temperature in Uganda, losses of total carotenoid in dried sweetpotato chips were high (about 70%) and this was not dependent on the use of opaque or transparent packaging. CONCLUSION: Losses of carotenoids during storage were considered to be more of a nutritional constraint to the utilisation of dried sweetpotato than losses occurring during drying. The relationship between characteristics of the cultivars and losses of carotenoids during drying should be taken into account in selection of cultivars for processing.
BACKGROUND: Orange-fleshed sweetpotato (OFSP) can be used to tackle vitamin A deficiency, a major public health problem in most developing countries. In East Africa, common ways of using sweetpotato include drying and subsequent storage. The aim of the study was to investigate the impact of drying and storage on the total carotenoid retention (as an estimate of provitamin A retention) from OFSP. RESULTS: Losses of total carotenoid during drying were generally low (15% or less). Total carotenoid retention in OFSP was not dependent on the type of dryer (solar or sun). Sweetpotato cultivar (Ejumula, Kakamega, SPK004/1, SPK004/1/1, SPK004/6 or SPK004/6/6) had a significant effect on retention in drying (P < 0.05). High percentage losses of total carotenoids were, however, correlated with high moisture content and high carotenoid content in fresh sweetpotato roots. After 4 months' storage at room temperature in Uganda, losses of total carotenoid in dried sweetpotato chips were high (about 70%) and this was not dependent on the use of opaque or transparent packaging. CONCLUSION: Losses of carotenoids during storage were considered to be more of a nutritional constraint to the utilisation of dried sweetpotato than losses occurring during drying. The relationship between characteristics of the cultivars and losses of carotenoids during drying should be taken into account in selection of cultivars for processing.
Authors: Aurélie Bechoff; Keith Ian Tomlins; Ugo Chijioke; Paul Ilona; Andrew Westby; Erick Boy Journal: PLoS One Date: 2018-03-21 Impact factor: 3.240
Authors: Oliver Xiaoou Dong; Shu Yu; Rashmi Jain; Nan Zhang; Phat Q Duong; Corinne Butler; Yan Li; Anna Lipzen; Joel A Martin; Kerrie W Barry; Jeremy Schmutz; Li Tian; Pamela C Ronald Journal: Nat Commun Date: 2020-03-04 Impact factor: 14.919
Authors: B P Mallikarjuna Swamy; Severino Marundan; Mercy Samia; Reynante L Ordonio; Democrito B Rebong; Ronalyn Miranda; Anielyn Alibuyog; Anna Theresa Rebong; Ma Angela Tabil; Roel R Suralta; Antonio A Alfonso; Partha Sarathi Biswas; Md Abdul Kader; Russell F Reinke; Raul Boncodin; Donald J MacKenzie Journal: Sci Rep Date: 2021-01-28 Impact factor: 4.379