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International Journal of Current Microbiology and Applied Sciences (IJCMAS)
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National Academy of Agricultural Sciences (NAAS)
NAAS Score: *5.38 (2019)
[Effective from January 1, 2019]
For more details click here

ICV 2018: 95.39
Index Copernicus ICI Journals Master List 2017 - IJCMAS--ICV 2018: 95.39
For more details click here

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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 2017: 100.00
NAAS RATING 2018: 5.38

Int.J.Curr.Microbiol.App.Sci.2017.6(6): 3013-3021
DOI: https://doi.org/10.20546/ijcmas.2017.606.358


Effect of Pre-Treatments on Quality Attributes of Solar Dehydrated Grape Pomace
P. Mamatha1*, K. Vanajalatha2, Veena Joshi3 and S. Narender Reddy4
1Department of Fruit Science, College of Horticulture, SKLTSHU, Rajendranagar, Telangana, India
2Deparment of crop physiology, College of Agriculture, PJTSAU, Rajendranagar, Telangana, India
*Corresponding author
Abstract:

The focus of this research was to analyze the physico-chemical and nutritional quality of a solar dried grape pomace as affected by eight chemical pre-treatments. Based on preliminary tests, grape pomace was dipped in 1% (w/v) Calcium chloride (T1), 1% (w/v) Citric acid (T2), 1% (w/v) Potassium metabisulphite (T3), 2% (w/v) Sodium chloride (T4) independently and 1% (w/v) Citric acid along with 0.5% (w/v) potassium metabisulphite (T5), 1% (w/v) Calcium chloride along with 0.5% (w/v) citric acid (T6) and 1% (w/v) Potassium metabisulphite along with 1% (w/v) calcium chloride (T7), and in water solution (T8) for 5 minutes. Quality characteristics of dehydrated grape pomace viz. moisture content, Tss, sugars, titratable acidity, total polyphenol and anthocyanins content, recovery %, dehydration ratio, rehydration and reconstitutability ratio as affected by pretreatment process were studied. The results expressed that the dehydrated grape pomace pre-treated with 1% (w/v) Potassium metabisulphite along with 1% (w/v) calcium chloride (T7) had recorded highest recovery per cent (26.32), rehydration ratio (1.57), reconstitutability ratio (0.41), TSS (8.69°B), reducing sugars (12.84%), total sugars (16.63%), minimum acidity (0.66%) and lowest dehydration ratio (3.79), with preferred moisture content (5.60%) followed by 1% (w/v) Citric acid along with 0.5% (w/v) potassium metabisulphite (T5). Higher content of total polyphenols (17.21mg/100g) and anthocyanins (62.08mg/100g) were recorded in 1% (w/v) Citric acid along with 0.5% (w/v) potassium metabisulphite (T5).


Keywords: Pre-treatments. Grape pomace. Polyphenols. Solar drying. Anthocyanins
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How to cite this article:

Mamatha, P., K. Vanajalatha, Veena Joshi and Narender Reddy, S. 2017. Effect of Pre-Treatments on Quality Attributes of Solar Dehydrated Grape Pomace.Int.J.Curr.Microbiol.App.Sci. 6(6): 3013-3021. doi: https://doi.org/10.20546/ijcmas.2017.606.358