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174538

A COMPARATIVE STUDY TO EVALUATE THREE IMPORTANT PLANT OILS FOUND IN EGYPT

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Last updated: 26 Dec 2024

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Abstract

Oils are a very important component in different diets, which makes it important for researchers to constantly search for a variety of sources of these oils that are acceptable to consumers on the one hand and are characterized by high nutritional value and storage properties on the other hand. This study was carried out to determine physical properties of linseed, soybean and walnut oils (Refractive index, color, specific gravity) as well as chemical properties (Acid value, saponification value, ester value, iodine value and peroxide value). The percentage of unsaponifiable matter and stability induction period at 100◦C were also estimated. To determine the nutritional value of these oils, both their fatty acid content (assessed by the gas chromatography apparatus) and sterol content (assessed by GC-MS). Physical properties of linseed, soybean or walnut oils showed that; refractive index were 1.48, 1.47 and 1.84,   respectively, while color (red) intensity were 9.5, 3.5 and 2.6, respectively and specific gravity were 0.93, 0.92 and 0.92, respectively. On the other hand, chemical properties of linseed, soybean or walnut oils showed that; saponification value were 192, 191 and 190.73(mg KOH/g oil), respectively, while acid value were 0.87, 0.27 and 0.79 (mg KOH/g oil), respectively, and iodine value were 175, 128 and 145 (g I2/100 g oil), respectively, finally, peroxide value were 1.95, 0.77 and 1.31 (Meq oxygen/Kg), respectively. Alpha linolenic acid was the major fatty acid in linseed oil (60.21%), while linoleic acid was the main fatty acid in both, soybean oil (52.83%) and walnut oil (61.85%). β-sitosterol was the main sterol in the linseed, soybean or walnut oils (54.72, 40.13 and 76.85%, respectively). As shown by the results, the three studied oils showed high content of essential fatty acids, (both omega-3 and omega-6), making them promising oils to support diets with essential fatty acids.              

DOI

10.21608/mjab.2019.174538

Keywords

Alpha- linolenic acid, Linoleic acid, linseed oil, soybean oil, walnut oil, Physical properties and chemical properties of oils, sterols

Authors

First Name

M.M.D.

Last Name

Shabana

MiddleName

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Affiliation

Biochemistry department, Faculty of Agriculture, Menoufia University.

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City

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Orcid

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First Name

M. M.

Last Name

Abozid

MiddleName

-

Affiliation

Biochemistry department, Faculty of Agriculture, Menoufia University.

Email

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City

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Orcid

-

First Name

S. A.

Last Name

El-Kadousy

MiddleName

-

Affiliation

Biochemistry department, Faculty of Agriculture, Menoufia University.

Email

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City

-

Orcid

-

First Name

F. M.

Last Name

El-Shuony

MiddleName

-

Affiliation

Biochemistry department, Faculty of Agriculture, Menoufia University.

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Orcid

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Volume

4

Article Issue

2

Related Issue

25345

Issue Date

2019-04-01

Receive Date

2021-06-02

Publish Date

2019-04-01

Page Start

13

Page End

22

Print ISSN

2357-0768

Online ISSN

2735-3532

Article File

MJAB_Volume 4_Issue 2_Pages 13-22.pdf

PDF . 295.4kB

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https://mjab.journals.ekb.eg/article_174538.html

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https://mjab.journals.ekb.eg/service?article_code=174538

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2

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original papers

Type Code

1,460

Publication Type

Journal

Publication Title

Menoufia Journal of Agricultural Biotechnology

Publication Link

https://mjab.journals.ekb.eg/

MainTitle

A COMPARATIVE STUDY TO EVALUATE THREE IMPORTANT PLANT OILS FOUND IN EGYPT

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Article

Created At

23 Jan 2023