Czech Journal of Food Sciences, 2004 (vol. 22), issue 6
Determination of egg content in pasta
H. Čížková, V. Prokorátová, M. Voldřich, F. Kvasnička, V. Soukupová
Czech J. Food Sci., 2004, 22(6):197-203 | DOI: 10.17221/3424-CJFS 
The recent Czech Food Law (Decree No. 264/2003 Col., 93/2000 Col. and 57/2003 Col. of the law No 110/1997 Col. as amended) specifies the requirements for the presence or minimum concentration of egg or egg yolk contents in relevant food products (mayonnaises, egg pastas, egg liqueurs). However, the methods for the determination of egg and/or egg yolk contents are not sufficiently specified. Three methods based on the determination of cholesterol, lysozyme, fatty acids and lipid contents were experimentally validated to evaluate the egg content in egg pasta. The concentration of egg solid in the real egg pasta samples was calculated according to (1)...
Application of β-d-glucans isolated from mushrooms Pleurotus ostreatus (pleuran) and Lentinus edodes (lentinan) for increasing the bioactivity of yoghurts
B. Hozová, Ľ. Kuniak, B. Kelemenová
Czech J. Food Sci., 2004, 22(6):204-214 | DOI: 10.17221/3425-CJFS
The objective of the model experiment was to examine the microbiological (yeasts, moulds, coliform bacteria) and sensory (appearance, colour, consistency, taste) qualities as well as the lifetime of white and fruit yoghurts enriched with different additions of two types of hydrogels of beta-d-glucan, namely pleuran (from Pleurotus ostreatus) and lentinan (from Lentinus edodes). The yoghurts were stored for 30 days under the refrigerator conditions (5°C ± 2°C), the sampling being done on the 1st, 15th and 30th day of the storage. The results obtained by the analyses of yoghurts with the addition...
The contents of total polyphenolic compounds and trans-resveratrol in white Riesling originated in the Czech Republic
K. Faitová, A. Hejtmánková, J. Lachman, V. Pivec, J. Dudjak
Czech J. Food Sci., 2004, 22(6):215-221 | DOI: 10.17221/3426-CJFS
Wine is a significant source of antioxidants in human nutrition. Every glass of wine contains approximately 200 different phenolic compounds, several of which have been noted as antioxidants because they have been shown to slow down the potentially damaging cell oxidation process. In white Riesling from different wine-growing sub-regions, kinds of wine, years of harvest and vintners, the content of total polyphenols (TP) was determined using spectrophotometric method, and that of trans-resveratrol (R) by HPLC method. The TP content was presented as gallic acid equivalent per litre of wine, and the content of R as trans-resveratrol...
Incidence of irradiated foods in the distribution network of Prague
I. Bohačenko, Z. Kopicová, I. Zámečníková
Czech J. Food Sci., 2004, 22(6):222-229 | DOI: 10.17221/3427-CJFS
The samples, 29 in total, of poultry, rabbit meat, cheese and exotic fruits were taken from the distribution network of Prague. None of the samples was declared as irradiated according to the Decree of the Ministry of Health, CR, No. 133/2004 Sb. The check of their possible exposure to irradiation was made by means of two methods, i.e. the procedure according to EN 1784 (determination of hydrocarbons generated by irradiation using gas chromatography) and the determination of non-bonded o-tyrosine by means of HPLC with electrochemical detection. Neither method brought evidence for the exposure to irradiation, i.e. the purchased foodstuffs concerned...
Prevalence of Salmonellae and their resistance to antibiotics in slaughtered pigs in the Czech Republic
F. Šišák, H. Havlíčková, R. Karpíšková, I. Rychlík
Czech J. Food Sci., 2004, 22(6):230-236 | DOI: 10.17221/3428-CJFS
Salmonella prevalence was assessed in 816 pigs from fifteen herds which were slaughtered in ten slaughterhouses from June 2001 to December 2002. No Salmonellae were isolated in pigs from eight herds in four slaughterhouses. Salmonella prevalence in pigs originating from the other seven herds ranged from 2.0% to 12.0%. The most frequent site of Salmonella isolation was caecum (2.45%). This finding is statistically significant (P < 0.01) as compared to those obtained with mesenteric lymph nodes (0.73%) and carcass swabs (0.12%). Salmonellae were not found in samples from the environments (n...