Showing papers by "Central Tuber Crops Research Institute published in 1990"
TL;DR: In this paper, Ramaman and infrared spectra of starch samples from sweet potato and different varieties of cassava (tapioca) are reported, and the results are discussed in relation to the hydrogen bonding and the properties of the starch samples.
Abstract: Raman and infrared spectra of starch samples from sweet potato and different varieties of cassava (tapioca) are reported. Three regions of the spectra, the OH stretching region (3560-3000cm-1), the CH stretching region (3000-2800cm-1) and the finger print region (1600-200cm-1), have been studied. The results are discussed in relation to the hydrogen bonding and the properties of starch samples.
113 citations
TL;DR: The β-carotene content of 21 clones of cassava from exotic and indigenous collections found to be possessing yellow colour in the flesh, was determined in this article, where values varied from 0·04 to 0·79 mg per 100 g edible portion, the highest being recorded for CE-314, an exotic collection.
17 citations
TL;DR: Rhizopus oryzae, associated with the post-harvest spoilage of cassava, produced high levels of extracellular rhodanese during exponential phase of growth, indicating the lack of catabolite repression in this organism.
16 citations
TL;DR: Biomethanation of cassava starch factory effluent in a batch digester produced 130 l biogas/kg dry matter with an average melthane content of 59%.
Abstract: Biomethanation of cassava starch factory effluent in a batch digester produced 130 l biogas/kg dry matter with an average melthane content of 59%. About 63% COD was removed during 60 days. In semicontinuous digesters, gas production was 3251/kg dry matter with a retention time of 33,3 days giving a COD reduction of 50%. Size of starter inoculum was important for good biogasification of the effluent.
13 citations
TL;DR: Both rootstock and scion had significant effects on net assimilation rate and tuber yield, demonstrating that both sink capacity and source activity are important in achieving maximum tuber yield.
Abstract: Source-sink relations in cassava were investigated following reciprocal grafting among three cultivars of different yield groups. Both rootstock and scion had significant effects on net assimilation rate and tuber yield, demonstrating that both sink capacity and source activity are important in achieving maximum tuber yield. The scion had no effect on tuber dry matter percentage and starch content of the grafts but the hydrocyanic acid content of the tuber was significantly influenced by both rootstock and scion.
6 citations
TL;DR: Tubers of Coleus parviflorus were inoculated with spores of the vesicular arbuscular mycorrhizal fungus Glomus microcarpum and subsequent planting of such tubers gave rise to nearly 100% infection even after 6 months of storage.
Abstract: Tubers of Coleus parviflorus were inoculated with spores of the vesicular arbuscular mycorrhizal fungus Glomus microcarpum. The spores had been suspended in a lignite slurry and stored in a refrigerator for 1–6 months periods. Inoculation took place by soaking the tubers in the slurry for 3 h followed by drying in the shade, subsequent planting of such tubers gave rise to nearly 100% infection even after 6 months of storage.
2 citations
01 Jul 1990
1 citations
TL;DR: A simple, rapid and precise colorimetric method is described for the stimulationeous determination of thiocyanate and thiosulphate, two intermediate forms of S produced during oxidation of elemental S to sulphate in the culture medium of Rhizopus oryzae.