Antioxidant properties of tert-butylhydroquinone and propyl gallate in frozen minced sprats
MetadataShow full item record
Relative effects of the combination of tert-butylhydroquinone (TBHQ) and propyl gallate (PG) with or without a sequestering agent (EDTA or citric acid, C A ) on rancidity development in minced sprats stored at -15 C were determined by following the changes in peroxide values, thiobarbituric acid values, sensory scores, and fatty acid composition of lipid extracts. The combination of 0.02% TBHQ and 0.02% PG was most effective in reducing the rate of oxidative rancidity development in frozen sprats. It allowed an extended induction period of at least 250 days. Lowering the concentration of the additives from 0.02% to 0.01% significantly reduced their antioxidant effectiveness giving rise to larger losses of polyunsaturated fatty acids. Addition of either EDTA or CA to the mixture of 0.02% TBHQ and 0.02% PG did not prevent significant losses of 20:5 and 22:6 fatty acids.
Panggat, E.B., Hanson, S.W. & Hole M. (1996). Antioxidant properties of tert-butylhydroquinone and propyl gallate in frozen minced sprats. In: C.B. Santiago, R.M. Coloso, O.M. Millamena & I.G. Borlongan (Eds.). Feeds for Small-Scale Aaquaculture. Proceedings of the National Seminar-Workshop on Fish Nutrition and Feeds (pp. 100-108). Tigbauan, Iloilo, Philippines : SEAFDEC Aquaculture Department. http://hdl.handle.net/10862/539
PublisherAquaculture Department, Southeast Asian Fisheries Development Center
Showing items related by title, author, creator and subject.
Agroindustrial waste products as sources of cheap substrates for algal single-cell protein production MT Zafaralla, LR Vidal & LE Travina - In IJ Dogma Jr., GC Trono Jr. & RA Tabbada (Eds.), Culture and use of algae in Southeast Asia. Proceedings of the Symposium on Culture and Utilization of Algae in Southeast Asia, 8-11 December 1981, Tigbauan, Iloilo, Philippines, 1990 - Aquaculture Department, Southeast Asian Fisheries Development CenterFour types of agroindustrial waste products were tested for their suitability as substrates for Chlorella single-cell protein production. Based on cell density on day 7, unsterilized rice straw filtrate, Tris-buffered inorganic medium (control), unsterilized slop (1%) and unsterilized rice hull filtrate were suitable culture media. Dry weight yield after two weeks did not vary among media. Gross protein content of algae was highest in rice straw with or without sterilization. Substrates for algal SCP production are assessed on the basis of their nutrient content, pH, and hygienic acceptability.
Conference paperThis paper, although with its limitations, attempts to review in a nutshell the recent investigations made locally on the utilization aspects of bangos. Cost analyses and feasibility studies on the manufacture of various products require more intensive study, however. It is apparent that the development of the bangos processing industry will depend initially on the quantity of raw material made available to the fish processor.
Conference paperThis is a discussion of the production costs, yields, and profitability of different sizes of fish farming operations, and of fish farms operating under different types of Philippine climate.