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Permeability and performance of Aloe vera based composite coatings on peeled carrots (Daucus carota)

KrishiKosh

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Title Permeability and performance of Aloe vera based composite coatings on peeled carrots (Daucus carota)
 
Creator Panwar, Sonu
 
Contributor Mishra, Bhawana
 
Subject Carrots, Aloe, Storage, Byproducts, Fruits, Refrigeration, Biological phenomena, Harvesting, Sugar, Inorganic compounds
 
Description The present investigation had been done to develop the Aloe vera based composite coatings
(AvCC) and to evaluate the shelf life of peeled carrots. Three different AvCC formulations having Aloe
vera gel viz. 5, 10 and 15%, 0.5% carboxymethyl cellulose (CMC), 5% peanut oil and 2% glycerol
monostearate (GMS) were prepared. Glycerol was used as a plasticizer. These coating formulations
were analyzed for gas (O2 and CO2) permeability, water vapor transmission rate and viscosity. 15%
AvCC had higher viscosity as well as reduced gas permeability and water vapor transmission rate.
Uniform healthy peeled carrots coated with AvCC were packed in LDPE (400 gauge) bags and stored
at room (14±3°C, 47±8%) and refrigerated (5±2°C, 55±2%) conditions. The samples were analyzed for
various parameters viz. physicochemical, microbiological and sensory on every 2nd day under room
condition and on every 4th day under refrigerated condition. The results were compared with uncoated
unpeeled and uncoated peeled carrots. During storage, at both room and refrigerated conditions, PLW,
decay loss, Hunter L value, surface microflora increased while Hunter a and b value, TSS, total sugar,
total carotenoids decreased. However, the magnitude was lower at refrigerated temperature. In coated
samples, 15% AvCC was most effective in reducing PLW, decay loss, Hunter L a b value, microbial
count and retaining higher TSS, total sugar, total carotenoids followed by 10% and 5% AvCC as
compared to uncoated peeled carrots. The sensory characteristics viz. color and appearance, texture and
overall acceptability of peeled carrots decreased during storage. 15% AvCC was rated higher in sensory
scores as compared to other coated samples as well as uncoated peeled carrots while lower than
uncoated unpeeled carrots. The results obtained in the present investigation indicated that peeled carrots
coated with 15% AvCC were best in quality till 12 and 24 days of storage at room and refrigerated
temperature, respectively.
 
Date 2016-11-15T10:30:50Z
2016-11-15T10:30:50Z
2010
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/85536
 
Language en
 
Format application/pdf
 
Publisher CCSHAU