Central Tuber Crops Research Institute

About: Central Tuber Crops Research Institute is a facility organization based out in Thiruvananthapuram, Kerala, India. It is known for research contribution in the topics: Starch & Fermentation. The organization has 475 authors who have published 587 publications receiving 10285 citations.

Purification and Partial Characterization of Proteinase and α-Amylase Inhibitors from Lesser Yam (Dioscorea esculenta)

Abstract: The proteinase and α-amylase isoinhibitors of lesser yam were isolated through TCA precipitation and DEAE cellulose chromatography. The major peak with proteinase inhibitor activity obtained by DEAE-cellulose chromatography was further fractionated to five isoinhibitor fractions with molecular weights 67, 50, 27, 15, and 12 kDa respectively in GPC and PAGE. On the contrary, the major peak with α-amylase inhibitor activity segregated into four isoinhibitors with molecular weights 63, 31, 24, and 16 kDa. Unlike most trypsin inhibitors the lesser yam proteinase inhibitors (LYTI) exhibited proportionate decrease in trypsin inhibition with increase in inhibitor concentration. The inhibitor potential of lesser yam α-amylase inhibitor (LYAI) however, increased with increase in inhibitor concentration. The LYTI was fairly thermostable, retaining 50% activity even after heating for 4 h at 90°C, while the LYAI was much less stable at this temperature. Out of the five fractions of LYTI, isoinhibitors II and...

Survey of Cassava Mosaic Disease in Kerala

Abstract: A survey was conducted on the incidence of cassava mosaic disease (CMD) in Kerala. Cassava mosaic disease occurred throughout the state at low to high incidences (44.5-96.75%) in the 35 regions surveyed. The disease incidence was higher in Thiruvananthapuram and Kollam districts and lower incidence was noticed in Wayanad district. Maximum white fly population was also observed in Thiruvananthapuram district of Kerala followed by Kollam. Survey results alsoindicate that Sri Lankan Cassava Mosaic Virus (SLCMV) is wide spread in Kerala.

Rheological characteristics of different tropical root starches

Abstract: The rheological properties of starch extracted from ten different species of tropical tuber crops were examined using a Bohlin rheometer. Suspensions with starch concentrations of 3, 4 and 5% were gelatinised at 757C and fed into the rheometer cup. A C 25 measuring system was used and the heating rate was 1.57C/min, heating schedule 75-957C, holding at 957C for 600 s, cooling to 357C at 1.57C/min, holding for 3600 s. For strain sweep tests, the range of strain used was 0-0.2% and the temperature of test was 357C. The data on viscosity, storage modulus (G0) and phase angle were obtained from the rheograms. The results indicated variability in the various properties of the different starches. However the results did not follow a definite trend. The viscosity of Colocasia starch was low while Canna edulis and yam starches had high viscosities. The storage modulus was also highest for Canna starch (70-93 Pa) for 5% and gel strength was comparatively high for Canna edulis, Dioscorea esculenta and D. rotundata starches. The phase angle values followed the pattern of G0 and all the starch pastes were found to be elastic in nature at higher concentration. The wide variability in rheological properties can be useful in different applications of tuber starches. (Less)