Main Article Content
The work was conducted on sunflower seeds of two cultivars namely ‘Kironi’ and ‘Hysun-46’. Proximate composition of the seeds, chemical characteristics and fatty acid composition of the oils, and its keeping quality at different storage conditions were studied. Moisture content of Kironi seeds was nearly twice than Hysun-46 (8.03 vs 4.46%). Crude fat in Hysun-46 seeds was somewhat higher than Kironi. Kironi had significantly higher crude protein whereas Hysun-46 contained significantly higher percent of starch than Kironi (7.05 vs 3.90%). Physical characteristics of oil such as viscosity, colour and transparency changed with time during storage; specific gravity and smoking temperature, however, remained unchanged. Acid values of the freshly extracted oil from Hysun-46 were unexpectedly high (98.75). Iodine values were found to be higher in Kironi than Hysun-46, so the former had greater proportion of unsaturation. Saponification values of the oils decreased with the time in open vessel, in amber coloured bottle at 4°C and also in boiled oil kept at room temperature. However, these values registered an increase in oils stored in closed vessel and amber coloured bottle at room temperature. Peroxide values increased in oils under all conditions except in amber bottle at 4°C. The ratio of linoleic acid to oleic acid in Kironi (2.3:1) was higher than that in Hysun-46 (1.9:1), indicating that Kironi had more semidrying capacity and suitable for edible purpose. The freshly extracted oil had attractive appearance. Between the two oil samples, Kironi seems somewhat superior to Hysun-46.
FAO (Food and Agricultural Organization). Production Yearbook. Food and Agricultural Organization of the United Nations. Rome, Italy; 1985.
Dorrel DG. Processing and utilization of oilseed sunflower. Agronomy Monograph, Sunflower Science and Technology, American Society of Agronomy, Madison, USA. 1978;19:407-440.
Sastry MCS, Subramanian N. Preliminary studies on processing of sunflower seed to obtain edible protein concentrates. J Am Oil Chem Soc. 1984;61:1039-1042.
Wahhab MA, Mondal MRI, Akbar MA, Alam MS, Ahmed MU, Begam F. Status of oil crops production in Bangladesh. Oil Research Centre, BARI, Joydevpur, Gazipur. 2002;4-6.
BBS (Bangladesh Bureau of Statistics). Yearbook of Agricultural Statistics. Bangladesh Bureau of Statistics. The Government of Peoples Republic of Bangladesh; 2012.
Rashid MH, Nasrin S, Mahalder D. Zero tilled dibbled sunflowers enables planting earlier and harvests more in the coastal saline area of Bangladesh. Int J Environ Sci Develop. 2014;5(3):260-264.
Anonymous. Sunflower farming gains popularity in Barisal. In “The Daily Star”, 22 May 2015, Dhaka. 2015;7.
Gabagambi DM, George V. Sunflower production situation in the central corridor of Tanzania. Final Report, Rural Livelihood Development Company, Tanzania; 2010.
AOAC. Official methods of analysis of the association of the official analytical chemist. 14th Edition. The Association of Official Analytical Chemists, Arlington, VA; 1984.
AOAC. Official methods of analysis of the association of the official analytical chemist. 17th Edition. The Association of Official Analytical Chemists, Gaithersburg, MD, USA; 2000.
Raghuramulu N, Madhavan NK, Kalyanasundaram S. A manual of laboratory techniques. Hyderabad, India: National Institute of Nutrition. Indian Council of Medical Research. 2003;56-58.
Piper CS. Soil and plant analysis. The University of Adelaide Press, Adelaide, Australia. 1950;368.
Atkinson SA, Schnurr CM, Donovan SM, Lonnerdal B. The non-protein nitrogen in human milk: Biochemistry and potential functional role. In: Atkinson SA, Lonnerdal B, Editors. Protein and Nonprotein Nitrogen in Human Milk. Boca Raton, FL: CRC Press. 1989;117-133.
Sadasivam S, Manickam A. Biochemical methods. Second Edition, New Age International (P) Limited, New Delhi-110 002, India; 1996.
Hall, Haczkaylo. Folin-Wu-Method for determination of glucose. In: Methods and Procedures for Plant Biochemical Research. The Exchange Store, College Station, Texas; 1963.
Ahsanullah M, Wahhab MA, Mondal MRI. “Udvidjat Taler Gunagun-o-Baybohar” (In Bengali). Oil Research Centre. Bangladesh Agriculture Research Institute. Joydebpur, Gazipur. 2001;6-15.
Kaffka KJ, Norris KH, Peredi J, Balogh A. Attempts to determine oil, protein, water, fibre content in sunflower seeds by the NIR technique. Acta Alimentaria. 1982;11:253-269.
Belitz HD, Grosch W. Edible fats and oils. In: Food Chemistry. Springer, Berlin, Heidelberg. 1999;602-630.
Khalil IA, Shah H, Yasmeen F, Mumtaj MA. Seed yield and fatty acid profile of sunflower hybrids. Sarhad J Agric. 2000;16(6):601-604.
Peredi J, Balogh A. Determination of the hull content of dehulled sunflower seed by NMR technique. Fat Science: Proceedings of the 16th ISF Congress. Budapest, Hungary, 4-7 October; 1983.
Maskan M, Gogus F. Effect of sugar on rheological properties of sunflower oil-water emulsions. J Food Engineering. 2000;43(3):173-177.
Lakshmidevi N, Prakash HS, Shetty HS. Effect of seed-borne Macrophomia phasiolina (Tassi) Goid, on physiochemical properties of sunflower oil. Int J Tropical Plant Diseases. 1992;10(1):79-84.
Zufarov O, Schmidt S, Sekretar S. Degumming of rapeseed and sunflower oils. Acta Chim Slovaca. 2008;1(1):321-328.