RÉSUMÉ
Four hundred and forty entries of sweet potato tubers from the International Potato Center were evaluated for chemical characteristics related to nutritional value. Dry matter range in the group was 15 to 45g/100g. The native entries DLP 2393, DLP 1120, DLP 2312, DLP 1908 and the foreign RCB 361F were selected for use in bread manufacture. Their average dry matter and crude protein was 38.5 and 9.2 respectively. Sweet potato bread was made replacing 30 of wheat flour with grinded sweet potato tubers. This bread had 11.0 crude protein in dry matter basis which were the same for bread made of wheat flour. There were no differences in organoleptic characteristics or protein quality (Apparent biological value: 37 vs 42; apparent digestibility: 81 vs 80; net protein utilization: 33 vs 39) between sweet potato or full wheat flour breads respectively.
Sujet(s)
Pain , Manipulation des aliments/méthodes , Solanum tuberosum , Farine , Valeur nutritive , Pain/analyse , Solanum tuberosumRÉSUMÉ
Post-harvest problems are important constraints to the expansion of production of food in many Latin American countries. Besides problems of bulkiness, perishability and seasonal production patterns, the necessity of reducing transportation costs, increasing rural employment, and finding new markets for processed products, requires the development of processing technologies. Possible processed products include a vast range of alternatives. Given limited time and resources, it is not always feasible to carry out detailed studies. Hence a practical, low-cost methodology is needed to evaluate the available options. This paper presents a series of methods to evaluate different processing possibilities. It describes in detail each method including a rapid initial assessment, market and consumer research, farm-oriented research, costs and returns analysis and finally, some marketing and promotion strategies.