Showing papers by "Central Tuber Crops Research Institute published in 1993"
TL;DR: Starch was extracted from ten cultivars of taro and various physicochemical properties were determined as discussed by the authors, with C-9 starch having the largest average granule size (5·19 μm) while the lowest was recorded for C-46 (2·96 μm).
40 citations
TL;DR: The functional properties of the starchy flour extracted from six varieties of cassava subjected to fermentation by a mixed culture inoculum comprised of lactobacilli, streptococci, corynebacteria and yeast cells are examined in this paper.
Abstract: The functional properties of the starchy flour extracted from six varieties of cassava subjected to fermentation by a mixed culture inoculum comprised of lactobacilli, streptococci, corynebacteria and yeast cells are examined. Apparent reduction in total and soluble amylose contents is observed. Differential scanning calorimetry of the samples indicated that the enthalpy of gelatinisation was reduced, while the gelatinisation temperature was enhanced. A marked reduction in Brabender viscosity values of starch from fermented tuber was observed, but the X-ray diffraction pattern was unaffected. All these changes were attributed to the presence of fibrous material and consequent reduction of starch in unit volume rather than any change in the starch granule structure.
23 citations
TL;DR: The continuous elimination of the male population by pheromone traps in the treatment has resulted in a drastic decline in the population build‐up of the weevil and consequent reduction in the damage, leading to increased production of marketable tubers over 53%.
Abstract: An IPM schedule using synthetic sex pheromone (Z‐3‐dodecenol‐E‐2‐butenoate) as the principal component against sweet potato weevil has been evaluated for the first time in India. The components of the IPM Programme were: (a) disinfecting the planting materials by dipping the slips in monocrotophos 0.05% for 10 min; (b) installation of pheromone traps from the first day of planting at 10 m distance (one trap/100 m2) to destroy the male weevils; and (c) re‐ridging the crop at 30 and 60 days after planting. The continuous elimination of the male population by pheromone traps in the treatment has resulted in a drastic decline in the population build‐up of the weevil and consequent reduction in the damage, leading to increased production of marketable tubers over 53%. In the first season weevil damage was reduced from 33% to 9.7% and in the second season from 39% to 9.5% by adopting the IPM schedule. The control field showed a four‐ to seven‐fold increase in the pest population (516 to 741 in the cont...
23 citations
TL;DR: In this article, the efficacy of a mixed culture inoculum in detoxifying intact cassava tuber and peel pieces was investigated and it was shown that cassava peels could be extensively detoxified through fermentation with a mixed-culture inoculum.
Abstract: The efficacy of a mixed culture inoculum in detoxifying intact cassava tuber and peel pieces was investigated. Fermented cassava tuber and peel pieces had more linamarase activity than the non-fermented control samples and this might have resulted partly from the release of endogenous linamarase from the retted tuber/peel pieces and partly due to the microbial linamarase. Approximately 24–26% of the total cyanide remained in the bound form in the fermented tuber while 67–79% existed as bound cyanide in the non-fermented controls. In cassava peels, only 15–33% of total cyanide remained in bound form after 72 h fermentation while 58–59% cyanide existed in bound form in the parallel non-fermented control peels. Free cyanide which could be easily eliminated through sun-drying was present at higher concentrations in the fermented tuber and peel compared with the non-fermented samples. The study showed that cassava tuber and peel could be extensively detoxified through fermentation with a mixed culture inoculum.
22 citations