Rajković Miloš B.
Quality of potatoes grown in various regions of Serbia as influenced by heavy metal and pesticide residues concentrations
Institute of Food Technology and Biochemistry, Faculty of Agriculture, University of Belgrade, Belgrade-Zemun (1,2)
Institute of Plant Protection and Food Products, Faculty of Agriculture, University of Belgrade, Belgrade-Zemun (3)
It is possible to decompose starch into monosaccharides by the method of acid starch hydrolysis. By applying appropriate chemical procedure, a main solution is obtained, from which aliquots are taken after filtration to determine of the present glucose according to Luff-Shoorlu method. The analysed potatoes of cv. Desiree, grown on various sites in Serbia, have starch content that corresponds to available literature data. The highest starch content is found in potatoes from Ivanjica and Novi Pazar, i.e.
The investigations of quality of vegetable oil delivered as 'Humanitarian aid'
Institute of Food Technology and Biochemistry, Faculty of Agriculture, University of Belgrade, Belgrade-Zemun (1,2,3)
Institute of Plant Protection and Food Products, Faculty of Agriculture, University of Belgrade, Belgrade-Zemun (4)
Institute of Occupational and Radiological Health “Dr Dragomir Krajović”, Belgrade (5,6)
The result of examination of oil of unknown origin from the crisis territory as follows: the examined oil has qualities permissible for human nutrition. The examination of contained quantity of contaminants and heavy metals showed that ingredients were not higher than values prescribed by the Statute, except for lead. It is on the upper limit. Contents of radionuclides range within the limits of average values. The quantity is not dangerous for human food.
Determination of uranium contents in the soils
Institute of Food Technology and Biochemistry, Faculty of Agriculture, Belgrade-Zemun (1)
Institute of Occupational and Radiological Health “Dr Dragomir Krajović”, Belgrade (2,3)
The usage of depleted uranium munitions was only indirectly forbidden (by General convention which is against environmental pollution) up to its mass application in the last decade of XX century (Iraq, Bosnia, Yugoslavia). The United Nations are on the good way of putting the depleted uranium to the list of forbidden weapons.
Determination of the corrosion rate in tins filled with peas and string beans during storage
Faculty of Technology, Zvornik, Republic of Srpska (1)
Institute of Food Technology and Biochemistry, Faculty of Agriculture, Belgrade-Zemun (2)
This paper presents the results of examination of the corrosion behaviour of electrolytic tinplate in model solutions of salts in liquid contents (fills) of peas and string beans tins. The tins have been stored at the temperature of 25°C during the period of 18 months. The obtained results show that the corrosion currents and consequently corrosion rates, too, have higher values in the liquid contents (fills) of the tins than in the pure model solutions.
The application of atomic absorption spectrophotometry (AAS) for determining the content of heavy metals in phosphogypsum
Faculty of Agriculture, Belgrade-Zemun (1,2,3)
Faculty of Technology, Zvornik, Republic of Srpska (4)
Phosphogypsum is formed as a by-product in the process of 'green' phosphoric acid production. This is done in the so called 'wet process' by the action of sulphuric acid on raw phosphate at low temperature (<100 °C). Despite the same molecular formula and marked similarity with natural gypsum, phosphogypsum contains more than 50 impurities, and this is directly connected with the type of phosphate used in the production cycle.
