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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
IJCMAS is now DOI (CrossRef) registered Research Journal. The DOIs are assigned to all published IJCMAS Articles.
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2020)
[Effective from January 1, 2020]
For more details click here

ICV 2019: 96.39
Index Copernicus ICI Journals Master List 2019 - IJCMAS--ICV 2019: 96.39
For more details click here

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Original Research Articles

PRINT ISSN : 2319-7692
Online ISSN : 2319-7706
Issues : 12 per year
Publisher : Excellent Publishers
Email : editorijcmas@gmail.com / submit@ijcmas.com
Editor-in-chief: Dr.M.Prakash
Index Copernicus ICV 2018: 95.39
NAAS RATING 2020: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(9): 2785-2793
DOI: https://doi.org/10.20546/ijcmas.2017.609.343


Studies on Various Concentrations of Antioxidants with Alkaline Emulsion of Ethyl Oleate as Pre-Treatment on Rate of Drying, Yield and Colour of Raisins Prepared from Seedless Grape (Vitis vinifera L.)
A.Venkatram1*, A.S. Padmavathamma1, D. Vijaya2, A. Siva Sankar3, K.Manorama4 and B. Srinivas Rao2
1Department of Fruit Science, Dr. Y.S.R. Horticultural University, Hyderabad, Telangana, India
2Grape Research Station, Rajendranagar, Hyderabad, Telangana, India
3Department of Crop Physiology, Acharya N.G. Ranga Agricultural University,Hyderabad, Telangana, India
4Quality Control Laboratory, Professor Jayashankar Telangana State Agricultural University, Hyderabad, Telangana, India
*Corresponding author
Abstract:

The investigation was planned and executed to study the influence of various concentrations of antioxidants (Ascorbic acid, AA 500, 750 and 1000 ppm and Benzyl adenine, BA 50, 100 and 150 ppm) with alkaline emulsion of ethyl oleate (AEEO, 2.4% K2CO3 + 1.5% ethyl oleate) as a pre-drying treatment on rate of drying, drying ratio (grape: raisin), yield and colour of raisins prepared from seedless varieties of grapes. The Selected grape bunches of seedless varieties Thompson Seedless (TS), 2A Clone (2AC), Sonaka (SO), Manik Chaman (MC) and Merbein Seedless (MS) were dried in ventilated rooms after pre-drying treatment. Results showed that the raisins prepared by using AEEO with AA 1000 ppm as pre-treatment showed lowest brown and mixed colored raisins, and correspondingly increased percentage of green colored raisins. The berries dried early in variety MS and it takes only 13.64 days followed by 2AC, TS, MC and SO in order. The raisins prepared from variety TS were superior compared to others in terms of drying ratio, raisin yield, raisin waste, average raisin weight. From this finding it can be concluded that the raisins prepared from Thompson Seedless by using alkaline emulsion of ethyl oleate with ascorbic acid 1000 ppm was superior to other varieties.


Keywords: Antioxidants, Seedless grapes, Drying time, Raisin colour, Raisin yield.
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How to cite this article:

Venkatram, A., A.S. Padmavathamma, D. Vijaya, A. Siva Sankar, K. Manorama and Srinivas Rao, B. 2017. Studies on Various Concentrations of Antioxidants with Alkaline Emulsion of Ethyl Oleate as Pre-Treatment on Rate of Drying, Yield and Colour of Raisins Prepared from Seedless Grape (Vitis vinifera L.).Int.J.Curr.Microbiol.App.Sci. 6(9): 2785-2793. doi: https://doi.org/10.20546/ijcmas.2017.609.343