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The effect of increasing levels of sodium nitrate on urinary iodine excretion, changes in the morphology of thyroid follicles, and thyroid gland hormonogenesis were studied. In addition, effects of nitrates on serum lipoproteins were examined. Twenty-four, 5-week old, growing male rats of Wistar strain were randomly assigned to four experimental groups (I – 0, II – 500, III – 1500, and IV – 3000 mg...
The paper addressed the assessment of nutritional patterns of 40-year-old women (n=592), participants of the programme “Prevention of cardiovascular diseases in a selected population from Wrocław”. Information on food intakes were collected using 24–h recall and history of nutrition (among others: usual daily number of meals, consumption frequency of different food products, nutritional preferences)...
The influence of the non-enzymatic glycosylation (glycation) of guanosine-5’-triphosphate (GTP) by glucose on its physicochemical properties was investigated. The progress of glycation was monitored by the ionic-exchange chromatography. The results of analysis of the glycated mixture enabled identifying its three components: free GTP, glycated GTP and GTP-glycated complex. These results were also...
Preferences of fish and seafood, criteria of choice and consumption frequency were examined in a group of 200 students of the Medical University of Gdańsk (Poland). They answered a self-administrated questionnaire about preferences of seafood and fish. The study was aimed at clarifying choice factors and consumption frequency of fish and seafood. The results of the study showed that respondents were...
Consumers want a healthy, tasty quality meat with a high nutritional value from cattle, lambs and pigs. Grass-based feeding systems increased (p<0.05) the percentage of n-3 fatty acids in the longissimus muscle lipids of beef and lamb meat. Besides the contribution from landscape maintenance as well as nature preservation, a pasture feeding system can be tailored to the consumer’s demand for healthier...
Citric, D-isocitric and L-malic acid contents in juices of three strawberry, raspberry, black currant and red currant varieties, as well as in selected raspberry and black currant juices with 30% addition of strawberry and red currant juices were determined in this study with the use of enzymatic methods. Furthermore, citric acid:D-isocitric acid ratios were estimated in these juices. Examinations...
The impact of casein diet supplementation with oligosaccharides extracted from lupin and pea seeds on caecal short-chain fatty acids production and nitrogen balance was investigated in Wistar rats. The experimental diets were supplemented with 8% extract from lupin or pea seeds and contained 3.9 or 4.9% of α-galactosides, respectively. The control diet was supplemented with 5% of cellulose. The addition...
Ethanolic extracts of phenolic compounds were prepared from green teas (Camellia sinensis L.), bearberry leaves (Arctostaphylos uva-ursi L.), hazelnuts (Corylus avellana), evening primrose (Oenothera biennis) and grape seeds (Vitis vinifera L.). All crude extracts were examined for their gallic acid content by HPLC. The bearberry-leaf preparation was also fractionated by a Sephadex LH-20 column chromatographic...
The study was aimed at investigating the possibility of obtaining a natural bioplex of magnesium from the biomass of fodder yeast C.utilis ATCC 9950 enriched in that element. Yeast cultures were run under dynamic conditions (with aeration) for 48 h on a control medium (YPD) and the experimental one enriched in magnesium ions at a concentration of 1.25 g/L. During the logarithmic phase of growth, magnesium...
It is important for consumers that the disinfectants used in the food processing industry should ensure the quality and microbiological safety of food. It is also important that they should not endanger their health through toxic intermediate products. Consequently, a growth of interest has been observed in alternative disinfectants, including ozone. An ozone molecule, owing to split of the third...
Granule-bound starch synthase and the structural and thermodynamic properties of the isolated starches were compared using amylopectin (2.1% amylose content), normal (20.5-25.1% amylose content) and high amylose (≥39.5% amylose) wheat cultivars of Japanese, Italian and Russian selections. Amylopectin (2.1% amylose content), normal (20.5-25.1% amylose content) and high amylose (amylose rich containing...
The aim of the paper was to assess the intakes of vitamins and minerals in participants of the programme “Prevention in cardiovascular diseases in a selected population from Wrocław”. To evaluate dietary intake use was made of the 24–hour dietary recall and history of nutrition. The intake of calcium (62% of the safe level of intake) was too low (because of inadequate consumption of milk and dietary...
Lead, cadmium and total mercury concentrations have been determined in the muscle of six fish species: roach (Rutilus rutilus L.), bream (Abramis brama L.), perch (Perca fluviatilis L.), pike (Esox lucius L.), vendace (Coregonus albula L.) and whitefish (Coregonus lavaretus L.) from selected lakes in North-Eastern Poland (Łańskie, Pluszne, Dłużek and Maróz), caught over the period October 1999 to...
The variation between different Egyptian milk species (cows, buffaloes, sheep, goat and camel) in microstructure, shape, size and volume distribution as well as rheological properties, of fat globules was determined. Milk samples were scanned with SEM. The electron micrographs obtained were analyzed using an image analysis computer program. Results showed fat globules of different milk species as...
Roasted sesame seeds, pumpkin seeds, sunflower seeds, soy beans, and wheat germs were obtained from Ekoprodukt company (Częstochowa, Poland). Phenolic compounds were extracted with 80% aqueous methanol. The extract of roasted sunflower seeds was characterised by a higher content of total phenolics (158 mg/g). The Total Antioxidant Capacity was the highest in the extract of roasted sunflower seeds...
In order to evaluate the perception of convenience food by 96 elderly people aged 65 and over, an interview using the Repertory Grid Method (RGM) was carried out. Additionally, apart from the interview, some detailed information about the importance of nine factors influencing the respondents’ choice of foods when shopping and their attitudes towards food-related quality of life was collected. Half...
Investigations were carried out on: potato tubers of 4 clones of cultivar Irga, transformed with viral genome sequences in order to improve their resistance to a necrotic strain of potato virus Y (PVYN); tubers of parent cultivar; two selected commercial cultivars. Tissue texture (expressed by puncture force and energy) and microstructure were observed after blanching and frying potato strips. A statistical...
The investigation was carried out on 72 fatteners of both sexes divided into two groups. Carcass meatiness determined after the slaughter of fatteners was a factor differentiating respective groups: group I with meatiness 49-54.4%, and group II with meatiness 54.7–60%. The m. longissimus dorsi was determined for the content of dry matter, protein, intramuscular fat and total cholesterol. Intramuscular...
The study was aimed at determining differences in the content of carbohydrates as well as fat and its constituents in diets of 10-15-year-old children characterised by different nutritional status and originating from small towns of the central-eastern Poland. The study demonstrated that the diet of overweight and obese children (BMI>90 ptc) compared to that of the thin children (BMI<10 ptc)...
The chloroform extract of Ailanthus altissima stem bark and the alcoholic extract of Ziziphus spina christi roots were tested for their antischistosomal and hepatoprotective effects. The effect of schistosomal infection and treatment with both extracts on the activities of aspartate and alanine aminotransferases, acid phosphatase, 5’nucleotidase, glucose-6-phosphatase, lactate dehydrogenase, alkaline...
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