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048 RAHMAN, M.M.; KIBRIA, G.; bananas ripened wilhin 6 days while the gamma
BHUIYAN, Z. H.; CHOWDHURY, K.; irradiated bananas ripened within 26 days,
KHAN, S. & KARIM, R. (Institute of Food indicating that the shelf life of banana was
Science & Technology (IFST), BCSIR, Dhaka). extended by 20 days thereby delaying banana
Studies on the Relation Between Water Activity ripening. The nutrient contents as well as some
and Sensory Qualities as well as Chemical important physico-chemical parameters of the
Changes of Coriander (Coriandrun sativum) irradiated Bananas and the control Bananas were
Powder in Flexible Packging Films. Bang. J. Sci. analyzed quantitatively at an interval of 2-4 days
Ind. Res., 2007, 42 (1), 53-58. throughout the experimental period. A minor
decrease in the ascorbic acid content was the only
Selection of suitable packaging film is necessary to adverse effects observed in irradiated bananas
minimize the deteriorative changes of foods. and no other major changes occurred in
Packaging films differ for different food products. nutritional and organoleplic qualities and the
Flexible packaging films are now widely used chemical constituents of banana is maintained. A
instead of hard packages for processed dry food taste-testing panel of 16 panelists determined the
products. In this study attempt has been made to acceptability of the fruit. The scores given by the
select a suitable packaging film for dry coriander panelists were statistically analyzed and the
powder at ambient temperature. Three types of treated bananas were found to be acceptable up to
packaging films like heat sealable laminated 26 days at room temperature whereas in the case
aluminium foil, high density polythene (HDPE) of control the fruits were spoiled within 6 days.
and poly propylene (PP) were chosen. The changes Thus, radiation can be used for the shelf life
in water activity, total ash, acid insoluble ash and extension of Bananas and is not harmful to
consequent effect on sensory qualities like texture, health.
colour, flavour and appearance of coriander
powder were investigated at an interval of two 540 : CHEMISTRY
months during one year storage period.
050 AHMED, M.G.; ROMMAN, U.K.R.;
049 ZAMAN, W. & IBRAHIM, M. (Fruits AKHTER, K.; HALIM, M.E. (Dept. of
and Food Processing and Preservation Research Chemistry, Dhaka University, Dhaka) &
Division, BCSIR Laboratories, Rajshahi); PAUL, AHMED, S. M. (Faculty of Science, American
D. (Dept. of Applied Nutrition & Food International University Bangladesh (AIUB),
Technology, Islamic University, Kushtia); Dhaka). Synthesis and Correlation of Spectral
ALAM, K. (Food Technology Division, Institute Properties of Some Substituted 1,3-Diphenyl-2-
of Food and Radiation Biology, Bangladesh Propen-1-Ones. Bang. J. Sci. Ind. Res., 2007, 42
Atomic Energy Research Establishment, Savar, (1), 45-52.
Dhaka) & HASSAN, P. (Institute of Biological
Sciences, Rajshahi University, Rajshahi). SHELF Seven arylideneacetophenones: l-(4-chlorophenyl)-
LIFE EXTENSION OF BANANA (MUSA 3-phenyl-2-propen-l-one (la), l-(4-nitrophenyl)-3-
SAPIENTUM BY GAMMA RADIATION. J. Bio- phenyl-2-propen-l-one (lb), l-(4-methoxyphenyl)-
Sci., 2007, 15, 47-53. 3-phenyl-2-propen-1-one (1c), 1-(4-
methylphenyl)-3-phenyl-2-propen-1-one (1d), 1 -
The effect of gamma radiation on the shelf life (4-mechlorophenyl)-3-(4-methoxyphenyl)-2-
extension of Bananas was studied. Bananas were propen-l-one (le), l-(4-inethylphenyl)-3-(4-
treated with three gamma radiation doses of 0.30k niethoxyphenyl)-2-propen-l-one (1f) and l,3-di(4-
Gy; 0.40k Gy and 0.50k Gy for 5 mins respectively methoxyphenyl)-2-propen-l-one (1g) were
and stored in a dry place under room conditions synthesized from the corresponding substituted
0
(25±2 C/ 80± 5% RH). The physical conditions of acetophenones and benzaldehydes in presence of
the radiation treated and control bananas were sodium hydroxide in aqueous elhanol. The
observed at every 2 days interval for their structures of the compounds la-g were confirmed
1
13
organoleptic properties till spoilage, The control by their UV, 1R, H NMR, C NMR spectral data.
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