The ever increasing dietary demands and the scarcity of edible oil sources have led to the need
for the exploration of new sources in order to meet the local demands. Blessed with nature’s
tremendous sources there is a dire need of exploring the non-traditional food and oil sources in
Pakistan. The present study was undertaken to evaluate the physicochemical, nutritional,
tocopherols’ composition and antimicrobial efficacy of the essential oils from two black
Sesamum indicum seed locally grown in Khyber Pakhtunkhwa, Pakistan. About four fungal
species (Phythium Ultimum, Paecilomyces Lilacinus ,Rhizopus stlonifer and Tricoderma
Harzanium) and four bacterial strains (Xnythomonas campestris,Proteus Mirabilis, Escherichia
Coli, Bacillus Cereus) were tested against different n-hexane and sesame oil fractions. Results
showed good antimicrobial properties of the oils against all the pathogens. The proximate
composition showed the seed cakes of both the varieties to be a good source of oil, protein,
dietary fiber, ash. Both of the varieties showed to be good sources minerals. The intra variety
difference in the nutrient composition was significant only in the percent oil, zinc, and copper.
The physicochemical tests of the oils from both varieties revealed that refractive index, surface
tension, density, specific gravity, saponification value, and iodine number fell well within the
international standards for edible oils. The fatty acids composition showed the oils to be a rich
sources of oleic acid, linolenic acid, and linoleic acid with an excellent proportion of unsaturated
to saturated fatty acids. Intra variety differences were significant in oleic acid, elaidic acid,
linoleic acid, and total unsaturated fatty acids. Tococpherol profile indicated the oils were rich
sources of tocopherols though the variety S-17 appreciably greater proportion of ? ? and total
tocopherols. These differences may be attributed to the genetic makeup or genotype response to
the local climate. Both of the oils showed good DPPH free radical scavenging properties. The
study conclude that indigenous variety of Sesamum Indicum possess excellent nutritional
composition along antioxidant and antimicrobial potential making it ideal as food with utility in
the development of variety of natural compounds.
Keywords: Sesamum Indicum, Proximate and Elemental Composition, Tocopherol profile,
physicochemical properties, Fatty acid Composition, DPPH free radical Scavenging,
Antimicrobial activities.
https://ijbpas.com/pdf/2018/April/MS_IJBPAS_2018_4396.pdf
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