The physicochemical properties, fatty acid composition, aflatoxin contamination and heavy metals of extracted mango kernel oils of four Bangladeshi varieties (Langra, Gopalbhog, Khirshapat & Amrupaly) were studied. The results were compared with published values of ‘CIR expert panel’, ‘Indian Standard of Mango Kernel Fat’, ‘Scientific Commission of the European Community’ and ‘US Food and Drug Administration (FDA)’. The estimated values of aflatoxin B1and total aflatoxins were 1.45809 ppb and 5.14761ppb respectively which were lower than the limit levels of ‘European Community (2 ppb for aflatoxin B1)’ and ‘US FDA (20ppb for total aflatoxins value)’. Heavy metals like arsenic & lead concentration were found 0.034 & 0.45 ppm respectively which were lower than the value of ‘Indian Standard of Mango Kernel Fat; 9231 (1979)’ (0.5 & 5.0 ppm respectively). In fatty acid composition; palmitic acid, stearic acid, arachidic acid, oleic acid and linoleic acid were within the range of ‘CIR expert panel’ reported values.Bangladesh J. Sci. Ind. Res. 52(1), 43-48, 2017

The present study was done to evaluate the quality and the vitamin A fortification status of 5 types of commercial edible oils sold in Dhaka city markets. The percentages of free fatty acid (FFA), peroxide value (POV), iodine value (IV) and fatty acid composition were estimated to evaluate the quality and vitamin A content were determined to evaluate the vitamin A fortification status of 25 commercial edible oils- soybean oil, sunflower oil, rice bran oil, mustard oil and palm olein (5 brands of each) . The results revealed that FFA, POV and IV of the commercial oils analyzed were within the BSTI standard limits. The highest saturated fatty acids (SFA) values ranging from 39.85 ± 0.005 to 46.97 ± 0.002 % was found in palm olein samples and the lowest SFA values ranging from 4.56 ± 0.031 to 6.97 ± 0.096 % was found in mustard oils. On the other hand, mustard oils contained highest monounsaturated fatty acids (MUFA) ranging from 69.30 ± 0.189 to 75.87 ± 0.069 % compared to other oils analyzed. Highest polyunsaturated fatty acids (PUFA) were recorded in sunflower oils 64.78 ± 0.035% followed by soybean oils 63.25 ± 0.245%. In addition, except sunflower and mustard oils, vitamin A was found in all the soybean and rice bran oils analyzed. On the contrary, vitamin A was found only in 60% of the palm olein samples analyzed and the content was much lower than the standard value (15-30 ppm). Bangladesh J. Sci. Ind. Res.54(1), 11-20, 2019

No abstract

The effect of different phytoplankton species on growth, survival and fatty acids composition of Nile tilapia (Oreochromis niloticus) was evaluated for 24 weeks. Treatment-1 was fed with commercial feed as Control, treatment-2 was fed with Spirulina platensis, treatment-3 was fed with Chlorella vulgaris and treatment-4 was fed with mixed phytoplankton (Chlorella vulgaris, Spirulina platensis, Azolla pinnata and Pistia stratiotes). The condition factor of fish found in treatment-3 with Chlorella vulgaris (1.73 ± 0.02) was significantly higher than that of treatment-1 as control (1.56 ± 0.02) at 24 weeks culture period. The specific growth rate of treatment-4 with mixed phytoplankton diet (2.00 ± 0.10) was significantly higher than treatment-3 with Chlorella vulgaris (1.13 ± 0.05) after 24 weeks of rearing. There was no significant difference among the four treatments in case of average daily gain, feed conversion ration and survival rate. The use of different phytoplankton such as Spirulina platensis, Chlorella vulgaris and Azolla pinnata influence the fatty acid profiles of Nile tilapia. Findings also showed that the amount of eicosapentaenoic acid (EPA) in treatment-3 fed with Chlorella vulgaris (1.83 ± 0.22) was highly significant than the other treatments. The highest amount of docosahexaenoic acid (DHA) was found in treatment-1 fed with commercial feed (2.70 ± 0.53%) and lowest in treatment-2 with Spirulina platensis (0.06 ± 0.02%). Among 19 unsaturated fatty acid, the highest concentration of PUFAs were recorded in treatment-3 (42.55 ± 3.46%) fed with Chlorella vulgaris. The findings of this study suggest that raising Nile tilapia with Chlorella vulgaris and Spirulina platensis in ponds may improve the growth and fatty acid profile of the fish. Dhaka Univ. J. Biol. Sci. 26(1): 13-27, 2017 (January)