Short-dough biscuits are popular snacks. Unfortunately, fat used in most of these products has low nutritional value due to the high content of saturated fatty acids. The most popular fat used in bakery products is palm oil. In this work high-oleic rapeseed oil was used in the form of oleogels structured by waxes (canelilla, rice bran, yellow and white beeswax), monoacyloglicerols and ethylcelullose. In this form oil keeps nutritional value and has solid consistency. Obtained oleogels were significantly different than palm oil in terms of texture and viscosity. However, using oleogel with 5% of monoacylglicerols, as a shortening let to obtain biscuits with similar properties to control sample (with palm oil). Addition of 2 and 3% of candelilla wax, 8% of ethylcelullose, 2% of rice bran wax and 5% of monoacylglicerols allowed to get products from which lipid fraction migration was similar or smaller then from control sample.
View related articles View Crossmark data Citing articles: 6 View citing articles Effect of high-oleic sunflower oil and other pro-health ingredients on physical and sensory properties of biscuits Efecto del aceite de girasol altamente oleico y otros ingredientes saludables en las propiedades físicas y sensoriales de las galletas
BACKGROUND: The widespread use of palm oil in food production affects high consumption of long-chain saturated fatty acids, which increases the risk of cardiovascular disease. Solid or semi-solid wax-based oleogels obtained as a result of edible oils structuring can be an alternative.RESULTS: Oleogels, obtained by structuring a mixture of refined rapeseed and linseed oils (1:1) with 30-80 g kg −1 candelilla wax (CW), were investigated using optical techniques: multi-speckle diffusing wave spectroscopy, centrifugal stability analysis, reflection method, and polarized light microscopy. Refined palm oil was a comparative sample. Increasing CW concentration resulted in an increase in values of L * parameter and opacity, a decrease in the Yellowness Index and a slight increase in the average crystal size. The microstructure of oleogels with 30 or 40 g kg −1 CW was least like the crystal network. Solidification of oleogels took place in two stages. Increase in CW concentration shortened solidification time and increased solidification temperature (greater elasticity of oleogels). Palm oil solidified the longest (497.1 min) and at the lowest temperature (29.3 °C). It showed lower resistance to centrifugal force than oleogels at 20 and 30 °C. All oleogels were stable (no oil release occurred) at 20 °C.CONCLUSION: Optical methods allow for an objective and detailed analysis of physical properties of palm oil and oleogels, as well as identification and tracking changes at the microstructural level over time. It has great potential in the edible lipid quality control at various stages of processing or storage.
Because potentially harmful trans fatty acids (TFAs) should be eliminated from the diet, each country should have updated estimates of TFA content in food. The purpose of the study was to provide data on TFA content in pastry products commercialized in the Polish market. Products made using hydrogenated fats (as declared by manufacturers) were tested. Samples were acquired between April 2017 and July 2017. Extraction of fat from all pastries was carried out by the method of Folch et al. The fatty acid (FA) composition, especially TFA content in extracted fats, was determined by gas chromatography. Fat in the products was characterized by a high level of saturated fatty acid (SFA; ca. 42 g/100 g of FA), with the exception of one sample. A great diversity of total TFA content in fat of the products was found (0.1 to 13.5 g/100 g of FA). Of the products tested, 37.5% had TFAs in excess of 2%. Furthermore, partially hydrogenated fats were the source of TFAs in the analyzed products, as demonstrated by high content of elaidic acid. In addition, there was a trend of a decrease in the daily intake of TFAs of industrial origin with pastry products (0.14 g) compared with earlier studies. These results highlight the ongoing need for improvement in terms of trans isomer content in pastry products in Poland. This study confirms the importance of developing effective policies for reducing the TFA content of food. HIGHLIGHTS
Introduction. Acrylamide is formed in several foods during high-temperature processing. In view of reports written about the neurotoxic, genotoxic and carcinogenic effects of acrylamide, it was considered that the presence of this substance in food products might pose a risk for human health. Currently, according to EU Commission recommendations, the content of acrylamide in food should be monitored. Objective. The aim of this work was to analyze the food preferences of youth and students from medical schools in Radom, central-eastern Poland, as the most frequent precipitantsas in the field of food products that may be a significant source of acrylamide in the diet. Furthermore, an attempt was made to determine the level of knowledge of the population in the field of acrylamide. Materials and method. The research was conducted by questionnaire. The study was based on the answers of 227 respondents. The survey was carried out by direct contact with an interviewer from February -June 2012. Results. Analysis of the study population shows that women consume more coffee than men. In addition, adults over 25 years old consumed the largest quantity of coffee; it can therefore be assumed that it is a significant source of acrylamide in their bodies. However, even young people under 17 declared that they consume coffee every day (20%). Conclusions. Due to the adverse effects of this compound it is important to reduce the level of acrylamide in food products. A few people in the population (7%) had heard of acrylamide previously, but none of them had any knowledge of its occurrence and formation. It is necessary to take strong action to change attitudes towards acrylamide and attempt to introduce ways to reduce this compound in the diet, for example, by appropriate selection of products in the daily diet and appropriate means of thermal preparation of products at home.
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