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Different flour types (whole, dehulled and high starch fraction) of pinto bean and field pea were extrusion-cooked in a Wenger TX-52 twin screw extruder. The temperature and moisture level were changed during the extrusion process to obtain the best quality extruded products. The extrudates were analysed for expansion, texture, ultrastructure and some functional properties. Our experiments showed...
Chelation by EDTA caused an increase in shear stress at fracture of whey protein concentrate (WPC) gels up to 50 mmol/L EDTA and decreased shear stress at fracture of whey protein isolate (WPI) gels. Because of different calcium contents, each prepared WPC/WPI suspension had different initial concentration of calcium ions. This suggests that a minimum amount of this mineral is required for optimum...
This review summarizes the up-to-date data on the consumption pattern of trans fatty acids in different countries including Poland, as well as the metabolism and metabolic effects of trans fatty acids in human organism. The health hazards linked with the consumption of trans fatty acids are also discussed.
Lysozyme (E.C.3.2.17) is widespread in nature and hen egg white is a rich source of the enzyme. Membrane isolation technique of lysozyme has a limited application because of poor yield and insufficient purity of product. The classic method based on the enzyme precipitation and crystallisation is still being used. The method is often replaced by ion exchange method that is also recommended for large-scale...
The nutritional habits of women and men employed in the budgetary and non-budgetary sectors were assessed for the Wielkopolska region Irrespective of the differences observed for both groups of workers, the examined food rations were not balanced regarding the proportions of energy from fats and carbohydrates, antioxidant vitamins, saturated fatty acids and dietary fibre. The differences in the intake...
The effect of pectin on lowering the sodium nitrite intoxication was studied. It was found statistically significant reduction in the concentration of blood methemoglobin and blood plasma nitrite ions in rats intoxicated with sodium nitrite and fed diets with 5 and 10% pectin. These indices did not further change upon the increase of diet proportion of pectin to 15%.
There is relatively little information concerning the bioavailability of thiamine from food products; nevertheless available data on thiamine show that this vitamin is a significant factor that plays an important role in their nutritional status. The bioavailability of thiamine depends on several factors of which food and diet composition appears to play a paramount importance.
A simple spectrophotometric method for the determination of total iodine content in foods by modification of Sveikina procedure, based on the works of Moxon and Dixon, is reported. The modified method had about 100-fold higher sensitivity in comparison to the above mentioned methods. The method detection limit (MDL) was 0.01 ng per 100 g of food and a mean recovery test of 92%. This method was used...
The khapra beetle (Trogoderma granarium Everts) is one of the most harmful storage pests found on quarantine lists of all the EPPO member countries. The authors, therefore, undertook observations on the duration of the development of the khapra beetle on barley malt and on the kernels of some malting barley varieties, referring the results obtained to the duration of the pest's development on wheat...
Five different extrudatcs were produced that were composed of ground oats, oat flour and corn groats. These substrates were used in different proportions: extrudates E1 and E5 did not contain corn groats but oats products only. The remaining extrudates (E2, E3, E4) contained corn groats and oats substrates in similar proportions. In the extrudates as well as in the mixtures of initial components the...
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