Dariusz Nowak

Dariusz Nowak
Nicolaus Copernicus University | umk · Department of Nutrition and Dietetics

PhD/Prof. UMK

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18
Publications
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330
Citations

Publications

Publications (18)
Article
Full-text available
Honey is a natural product which owes its health benefits to its numerous bioactive compounds. The composition of honey is highly diverse and depends on the type of honey and its origin. Antioxidant capacity arises mainly from the total content of polyphenols and their composition. The aim of this study was to perform a multidimensional comparative...
Article
Full-text available
Olive oil is considered a valuable ingredient of human diet. It is a good source of mono- and polyunsaturated fatty acids, as well as other bioactive compounds, especially polyphenols. The composition of olive oil depends mainly on the variety of plant, cultivation practices, and manufacturing conditions. Traditional processing methods may ensure b...
Article
Full-text available
Energy drinks (EDs) contain sugar, caffeine, and other bioactive compounds. Recently, new types of EDs, enriched with fruit juices, natural pigments, and plant extracts, have been launched in the market. The objective of this study was to investigate the composition and antioxidant properties of the most popular classic and fruit EDs. The study was...
Article
Originating from New Zealand manuka honey distinguishes itself from other honeys. The purpose of this study was to compare the antioxidant and antimicrobial properties of manuka honey and selected Polish honeys. Antioxidant capacity, total polyphenol and total flavonoid content were determined. Furthermore, the antimicrobial activity and the Minimu...
Article
Full-text available
The purpose of this study has been to determine the effect of acute consumption of noni and chokeberry juices vs. energy drinks on blood pressure, heart rate, and blood glucose. The subjects divided into 4 groups, which consumed three portions of noni or chokeberry juices (30 mL or 200 mL, respectively) and energy drink (ED) or water (200 mL) at on...
Article
Full-text available
Various natural sources of antioxidants, which may help defy oxidative stress and thereby reduce the risk of many diseases, are being searched for. Exotic fruits and good quality exotic fruit juices can be an alternative to many berries grown in Europe. This paper presents the antioxidant properties and composition of polyphenols of acai, maqui ber...
Article
Many studies have shown that bioactive compounds, for example, polyphenols, and so on can play an important role in reducing oxidative stress and protect against various diseases. The sources of these compounds in the human diet include mainly fruit and good quality fruit juices, which may contain polyphenols but also other phytochemicals such as v...
Article
Full-text available
Background: Energy drinks (EDs) are very popular among young people, who consume them for various reasons. A standard ED typically contains 80 mg of caffeine, as well as glucose, taurine, vitamins and other ingredients. Excessive consumption of EDs and accumulation of the above ingredients, as well as their mutual interactions, can be hazardous to...
Article
Background: A diet rich in fruit, vegetables and juices is associated with health benefit and reduced risk of certain civilization diseases. Antioxidant properties depend mainly on the total content of polyphenols and their composition. The aim of this study was to perform a multidimensional comparative analysis of phenolic compounds of organic ju...
Article
Full-text available
Background: Energy drinks (EDs) have become widely popular among young adults and, even more so, among adolescents. Increasingly, they are consumed by athletes, particularly those who have just begun their sporting career. Uncontrolled and high consumption of EDs, in addition to other sources of caffeine, may pose a threat to the health of young p...
Article
Nowak D., Grąbczewska Z., Goślinski M., Obonska K., Dąbrowska A., Kubica J. (2016): Effect of chokeberry juice consumption on antioxidant capacity, lipids profile and endothelial function in healthy people: a pilot study. Czech J. Food Sci., 34: 39–46. Many studies show that the consumption of juices rich in polyphenols may increase serum antioxida...
Article
The bioactive compounds, and hence the antioxidant capacity, of fruit juice are affected by a given type of juice and fruit processing conditions. In this study, some polyphenol-rich juices and nectars were compared, considering the manufacturing conditions (Stage I). Organic chokeberry juice was determined to possess the highest antioxidant capaci...
Article
Full-text available
Background: Energy drinks (EDs) are extremely popular among adults and adolescents. Regular intake of EDs may lead to an overdose of caffeine, loss of bone mass, overweight, hypertension and, in older age, osteoporosis and cardiovascular diseases. Some people mix EDs with alcohol, which adversely affects their health. The objective of this study w...
Article
Tenderness of meat is considered as the most important feature of meat quality. Three proteolytic systems present in a muscle were examined as those which can play a role in the postmortem proteolysis and tenderization: the system of calpains, lysosomal cathepsins and MCP (multicatalytic proteinase complex). There are several theories (enzymatic or...
Article
This work concerns the research on improvement of beef tenderness. First, calcium and magnesium ions were introduced into meat with the aim to improve the meat tenderness through activation of proteolytic enzymes. Then, the conditions of meat ripening were modified apart from metal ions by applying temperatures 8, 12 and 18°C. The meat samples subj...

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