Discovering new yeast species can be crucial for creating new types of beers. In this study, we investigated three new yeast species, Saccharomyces bayanus, Schizosaccharomyces japonicus and Schizosaccharomyces pombe var. malidevorans, which have not been previously used in the brewing industry. Colour, total acidity, bitterness, aroma profile, total phenolic, flavonoid, mineral content and organoleptic characteristics of beers fermented by these strains were analysed to discover their applicability in the brewing industry. They did not significantly affect the nutritional value and colour of the beers, but showed increased acidity compared to the control Saccharomyces cerevisiae. GC-MS (Gas Chromatography-Mass Spectrometry) analysis revealed 33 aroma compounds, some of which were identical and some unique. S. cerevisiae and S. bayanus produced a similar number (19–20) of aroma compounds, while S. japonicus produced the fewest, including some undesirable compounds. Isobutyl alcohol, isoamyl alcohol, acetol, dimethylpyrazine, acetic acid, 4-cyclopentene-1,3-dione, butyrolactone, 2-furanmethanol, phenylethyl alcohol, maltol and pyranone that provide desired aromas in beers could be found in every sample. The new yeasts significantly increased polyphenols and decreased flavonoid content. Based on the results above and the taste scores, the strains S. bayanus and S. pombe var. malidevorans may be suitable for brewing, while S. japonicus is less or only suitable for combined fermentation.

The increasing consumption of beer indicates the necessity of the thorough analysis of its composition. In this study, the total phenolic content, flavonoid content and colour intensity of 24 beer samples have been determined. The samples contained pale barley, dark barley, pale wheat and dark wheat beers. The aim of the study was to determine the amount of the antioxidant compounds in beer, as well as to find correlation between different beer types and the above mentioned parameters. Dark barley samples contained phenolic compounds in the highest concentrations, and it can also be concluded that dark beers contain phenolic compounds and flavonoids in higher concentrations than pale beers in the case of barley and wheat samples. According to the performed statistical analysis, these beer types cannot be differentiated based on the analysed parameters. The highest percentage of correctly classified samples could be observed in case of dark barley samples, but this value has only been 75%, and the total result of correctly classified cases was only 41.7%. The analysis of more samples and parameters is required to carry out a successful differentiation.

In our work, the quality characteristics and nutritional parameters of red fruits were examined in their fresh state and after lyophilization. The purpose of the comparison was to assess the effect of freeze drying on these fruits. The elemental and dry matter content of fresh fruits was determined, and the changes in their total phenolic compound and flavonoid content, as well as their vitamin C and acid content. A slight increase in the total phenolic compound and flavonoid content and a smaller decrease in the vitamin C content were observed, while the quantity of total acids was reduced in the sample to almost one-third after lyophilization.

Úgy a kenyér, mint a fűszerek fontos szerepet játszanak a mindennapi táplálkozásunkban. A bazsalikom egy rendkívül kedvelt fűszer, melynek jótékony hatásai már régóta ismertek. Ezért is végeztük el a kenyerek kereskedelmi forgalomban kapható szárított bazsalikommal való dúsítását. A bazsalikom esetében meghatároztuk annak antioxidáns hatású vegyület-, valamint elemtartalmát. E paraméterek tekin-tetében kiemelkedően előnyös tulajdonságokra utaló eredményeket kaptunk. A dúsítás során 6 különböző koncentrációt alkalmaztunk, valamint egy kontroll mintát készítettünk, amely nem tartalmazott bazsalikomot. A fűszer mennyiségének növelésével a kenyerekben nőtt az összes polifenol (TPC – Total Polyphenol Content)-, flavonoid- és makroelem tartalom. A nyerszsír tartalomban nem tapasztaltunk eltérést a termékek között. A fehérjetartalom esetében minimális növekedést mértünk a fűszer koncentráció-jának növelésével.

Many studies are published on food fortification, as the production, testing and consumption of functional foods has become a central issue these days. Bread is one of our important staple foods, and we also regularly eat various spices. Bread may also contain spices. In the course of our work, bread recipes containing different spices in different quantities were developed. In this study, the macroelement content of seven spices (basil, dill, oregano, caraway, chives, rosemary and garlic granules) and 42 fortified breads were determined using an inductively coupled plasma optical emission spectrometer (ICP-OES), and their contribution to the nutrient reference value (NRV) was calculated. Based on the measured concentrations, higher element contents were measured in the spices used by us compared to the values of other studies. Outstanding results values were determined in basil, dill, oregano and chives. In the case of breads, the calcium, potassium and magnesium content of the products made with the above-mentioned spices was higher than the data found in the literature. Taking into account the results, it was possible to produce macroelement-containing products that contribute to the body’s daily macroelement needs more than usual.