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Title of Thesis

Postharvest Management of Kinnow (Citrus reticulata Blanco) Mandarin to Extend Shelf Life

Author(s)

BABAR EHSAN BAJWA

Institute/University/Department Details
National Institute of Food Science and Technology, University Of Agriculture, Faisalabad.
Session
2008
Subject
Food Technology
Number of Pages
217
Keywords (Extracted from title, table of contents and abstract of thesis)
Epidemiology of Mastitis, Dairy Buffalo and Cow, Tehsil Samundri, Isolation of Mastitis Pathogens

Abstract

Pakistan is the sixth largest producer of Kinnow mandarin in the world. Significant postharvest losses (35-40%) limit the enormous market potential of this fruit crop. The Kinnow will be studied for crop seasons 2003-04 and 2004-05 to extend the shelf life. The fruit will be divided into three lots. One lot will be coated with shellac based wax (SBW), other with polyethylene based wax (PBW) and third will be untreated (control). The fruit will be stored at four different temperatures i.e., 2, 5, 8 C and ambient (room temperature) for four months. Relative humidity between 85 to 90% will be maintained in the cold chambers during the whole storage period. The Fruit will be analyzed for physical tests i.e. physiological loss in weight (PLW), percent peel pitting (PP) and percent coating fracture (CF). The Fruit will also be analyzed for various chemical characteristics like, ethanol, acetaldehyde, ascorbic acid, total sugars, acidity and total soluble solids(TSS) contents to assess the biochemical changes in the fruit. The Pesticide residues will be determined in the peel, pulp and fruit juice through HPTLC and HPLC. Sensory evaluation of the fruit will be carried out after 15 days interval until the acceptable quality of the fruit. Finally the data will be statistically analyzed by using generalized linear model (GLM) to determine level of significance of different treatments. The objective of the present study will be to extend the shelf life of Kinnow by low temperature storage through wax coating.

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S. No. Chapter Title of the Chapters Page Size (KB)
1 0 CONTENTS

 

 
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2

1

INTRODUCTION

 

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3 2 REVIEW OF LITERATURE

2.1 History and Origin of Citrus Fruits

2.2 Postharvest Losses and Physiological Disorders

2.3 Postharvest Peel Pitting

2.4 Fruit Coatings and Wax Applications

2.5 Physicochemical Changes During Storage of Mandarins

2.6 Pesticides and Fungicides Residues

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4 3 MATERIALS AND METHODS

3.1 Harvesting

3.2 Washing, Grading and Wax Coating

3.3 Storage

3.4 Physiological Disorders

3.5 Physico-Chemical Analysis

3.6 Estimation of Internal Volatiles

3.7 Pesticides and Fungicides

3.8 Sensory Evaluation

3.9 Statistical Analysis

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5 4 RESULTS AND DISCUSSION

4.1 Effect of Different Treatments on Physiological Loss in Weight of Kinnows During 2004 Crop Year.

4.2 Effect of Different Treatments on Physiological Loss in Weight of Kinnows During 2005 Crop Year.

4.3 Effect of Different Treatments on Fruit Rottening of Kinnows During 2004 Crop Year.

4.4 Effect of Different Treatments on Percent Fruit Rottening of Kinnows During 2005 Crop Year.

4.5 Effect of Different Treatments on Percent Peel Pitting of Kinnows During 2004 Crop Year.

4.6 Effect of Different Treatments on Percent Peel Pitting of Kinnows During 2005 Crop Year.

4.7 Effect of Different Treatments on Percent Surface Fracture of Kinnows During 2004 Crop Year.

4.8 Effect of Different Treatments on Percent Surface Fracture of Kinnows During 2005 Crop Year.

4.9 Effect of Different Treatments on Percent Chilling Injury of Kinnows During 2004 Crop Year.

4.10 Effect of Different Treatments on Percent Chilling Injury of Kinnows During 2005 Crop Year.

4.11 Effect of Different Treatments on Total Soluble Solids of Kinnows During 2004 Crop Year.

4.12 Effect of Different Treatments on Total Soluble Solids of Kinnows During 2005 Crop Year.

4.13 Effect of Different Treatments on Percent Total Sugars of Kinnows During 2004 Crop Year.

4.14 Effect of Different Treatments on Percent Total Sugars of Kinnows During 2005 Crop Year.

4.15 Effect of Different Treatments on Acidity of Kinnows During 2004 Crop Year.

4.16 Effect of Different Treatments on Acidity of Kinnows During 2005 Crop year.

4.18 Effect of Different Treatments on Ascorbic Acid of Kinnows During 2004 Crop Year.

4.19 Effect of Different Treatments on Ascorbic Acid of Kinnows During 2005 Crop Year.

4.20 Effect of Different Treatments on TSS/Acidity of Kinnows During 2004 Crop Year.

4.21 Effect of Different Treatments on TSS/Acidity of Kinnows During 2005 Crop Year..

4.22 Effect of Different Treatments on Ethanol Content of Kinnows During 2004 Crop Year.

4.23 Effect of Different Treatments on Ethanol Content of Kinnows During 2005 Crop Year.

4.24 Effect of Different Treatments on Acetaldehyde Content of Kinnows During 2004 Crop Year.

4.25 Effect of Different Treatments on Acetaldehyde Content of Kinnows During 2005 Crop Year.

4.26 Analysis of Kinnows for Pesticides and Fungicides Residues.

4.27 Effect of Different Treatments on Metalaxyl and Carbaryl Residues of Kinnows During Storage.

4.28 Effect of Different Treatments on Acephate and Dimethoate Residues of Kinnows During Storage.

4.29 Effect of Different Treatments on Methamidophos and Dioxacarb Residues of Kinnows During Storage.

4.30 Effect of Different Treatments on Methomyl and Parathion Methyl Residues of Kinnows During Storage.

4.31 Effect of Different Treatments on Thiabendazole Residues of Kinnows During Storage.

4.32 Sensory Evaluation of Kinnows.

4.33 Effect of Different Treatments on Taste of Kinnows During 2004 Crop year.

4.34 Effect of Different Treatments on Aroma of Kinnows During Crop year 2004.

4.35 Effect of Different Treatments on Flavor of Kinnows During Crop year 2004.

4.36 Effect of Different Treatments on Overall Acceptability of Kinnows During 2004 Crop Year.

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6 5 SUMMARY

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7 6 LITERATURE CITED AND APPENDICES

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