Honey is produced by honeybees from nectar, sap of plant parts, or the juicy material secreted by... more Honey is produced by honeybees from nectar, sap of plant parts, or the juicy material secreted by sucking insects living on trees. It is rich in nutritionally useful components, the occurrence of which highly depends on the botanical and geographical origin of honey. Our goal is to develop a new, rapid, and accurate combination of analytical methods for identification of botanical and geographical origin. Physicochemical parameters (pH, electrical conductivity, moisture, and ash content), colour (L*a*b*), and antioxidant properties were determined in addition to correlative techniques, such as electronic tongue and near infrared spectroscopy. For the statistical evaluation ANOVA, principal component analysis, and linear discriminant analysis were applied. Results showed significant differences (P<0.05) in physicochemical properties, colour, and antioxidant capacity according to the botanical origin of honeys. Electronic tongue (ET) and near infrared spectroscopy (NIR) techniques were useful in the identification of the botanical and geographical origin, showing generally good accuracy. The physicochemical parameters are important and can serve as reference methods, completing NIR and ET as target techniques, which are promising, but need further improvement for the determination of honey origin.
Heat treatment of honey is usually applied due to crystallized form is not preferred by the consu... more Heat treatment of honey is usually applied due to crystallized form is not preferred by the consumers and makes handling harder to producers and beekeepers. Our aim is to find a method that can detect heat treatment of honey even at lower levels. In the study honeys were heated at 40°C, 60°C, 80°C, 100°C for one, two, three and four hours. Moisture, pH, electrical conductivity, HMF, color were determined, and spectra of honeys were recorded with NIRS. Results showed that NIRS could distinguish the honeys heated at 40°C while HMF was able to detect higher than 60°C treatment at significant level.
The purpose of this review is to provide a critical evaluation of the nutritional and sensory pro... more The purpose of this review is to provide a critical evaluation of the nutritional and sensory properties of ancient wheats (spelt, emmer, einkorn, and kamut) and the methods used to analyze them. This paper provides a comprehensive overview of the main analytical methods applied to study the nutritional properties of ancient wheats. According to our findings, protein content was the most commonly studied macronutrient across all types of ancient wheat species. The article notes that einkorn bran showed the highest protein and ash content, which reveals the potential of ancient wheats to be more widely used in food products. Regarding the majority of amino acids in spelt wheat cultivars, the general trend in the data was rather consistent. This review also compares sensory evaluation methods for different wheat products made from ancient wheats, such as bread, pasta, cooked grains, porridge, snacks, and muffins. The various reported methods and panel sizes used prove that ancient whe...
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Xanthohumol is a hop-derived flavonoid that has been widely examined for its health-protecting an... more Xanthohumol is a hop-derived flavonoid that has been widely examined for its health-protecting and antitumorigenic properties, but not yet in a natural beer matrix. The aim of the study was to investigate the antitumorigenic potential of a xanthohumol-enriched beer in vivo. Four groups of 4 × 10 nude mice were formed. Following the injection of HeLa tumorigenic cell lines, the treatment groups were administered a xanthohumol supplementation for 100 days, either dissolved in beer or in an ethanolic solution with the same alcohol strength as beer. The control groups received un-supplemented material. The terminal tumor masses, liver weights, and plasma antioxidant capacities (FRAP and ABTS methods) were measured. For the statistical analysis, a two-way ANOVA test was performed (p < 0.05). There were no statistically significant differences in tumor size between the groups. Xanthohumol did not induce higher levels of plasma antioxidant capacity, neither in beer nor in the water–etha...
Propolis (bee glue) is an extremely valuable “byproduct” of beekeeping. Its ingredients include m... more Propolis (bee glue) is an extremely valuable “byproduct” of beekeeping. Its ingredients include many bioactive substances that have a beneficial effect on the human body, which is why propolis has been used by mankind for thousands of years, mainly for medicinal and occasionally cosmetic purposes. Many medicinal and cosmetic products are still produced from the substance today. Its composition varies considerably depending on the geographical location and the health of the producing bees. Its most important components are polyphenolic compounds (phenolic acids, flavonoids, flavonoid esters, diterpenes, sesquiterpenes), lignans, aromatic aldehydes, alcohols, amino acids, fatty acids, organic acids, hydrocarbons, vitamins and minerals. Propolis can be considered a medicinal food. Extracts made from it possess antibacterial, antiviral and antifungal effects. Propolis, in limited quantities, is also suitable for human consumption. The safe dose of propolis for healthy people is 70 mg/da...
Hungarian fruit vinegars were characterised in terms of physicochemical attributes (total polyphe... more Hungarian fruit vinegars were characterised in terms of physicochemical attributes (total polyphenol content, antioxidant characteristics/FRAP, CUPRAC, ABTS/, ascorbic acid content, pH, total soluble solids), sensory profiles, and antimicrobial properties. Both compositional and sensory profiles showed distinct patterns depending on the type of vinegar (Tokaj wine, balsamic or apple) and the additional fruit used. Balsamic vinegars maturated on rosehip, sea buckthorn, and raspberry showed outstanding antioxidant performances. Rosehip, raspberry, and quince vinegars, as well as vinegars produced from Tokaji aszú and balsamic apple obtained high scores for fruity and sweet notes. Antimicrobial activities were tested on Gram-negative and Gram-positive organisms, including probiotic bacteria. Generally, only weak activities were obtained, which was attributed to the natural sugar content of the samples, depending on the type of the vinegar and the fruit. Similar results, but more pronou...
Honey adulteration is a worldwide problem; however, its detection is a challenge for researchers ... more Honey adulteration is a worldwide problem; however, its detection is a challenge for researchers and authorities. There are numerous ways of honey counterfeiting; amongst them, direct adulteration is one of the most common methods. Correlative techniques, such as near-infrared spectroscopy (NIRS), are useful tools in the detection of honey adulteration; however, this method has not been applied to Hungarian honeys. The aim of this research was to investigate the performance of NIRS for the detection of sugar syrup addition to Hungarian honeys at lower concentration levels (<10% w/w). Acacia, rape, forest, sunflower, and linden honeys were mixed with high-fructose-content sugar syrup, rice syrup, or self-made glucose fructose syrup in 3%, 5%, and 10% w/w. NIRS analysis was performed in the spectral range of 950–1650 nm. Principal component analysis was coupled with linear discriminant analysis and partial least square regression models were built for the classification and predict...
A propolisz (méhszurok) a méhészetek rendkívül értékes „melléktermékei”. Összetevői között számos... more A propolisz (méhszurok) a méhészetek rendkívül értékes „melléktermékei”. Összetevői között számos, az emberi szervezetre előnyös hatást gyakorló bioaktív anyag található, ezért a propoliszt az emberiség több évezrede használja elsősorban gyógyászati, esetenként kozmetikai célokra. E vegyületből napjainkban is számos, gyógyszer- és kozmetikai készítményt állítanak elő. Összetétele a földrajzi helytől, az előállító méhek egészségi állapotától függően számottevően változó. Fontosabb összetevői a polifenolos vegyületek (fenolsavak, flavonoidok, flavonoid-észterek, diterpének, szeszkviterpének), lignánok, aromás aldehidek, alkoholok, aminosavak, zsírsavak, szerves savak, szénhidrogének, vitaminok és ásványi anyagok. A propolisz gyógyhatású élelmiszernek tekinthető. A belőle készült kivonatok antibakteriális, antivirális és gombaölő hatással rendelkeznek. A propolisz – korlátozott mennyiségben – emberi fogyasztásra is alkalmas. A propolisz biztonságos dózisa egészséges emberek számára 70 ...
Monotony in a gluten-free (GF) diet can be a challenge because of a limited choice of acceptable ... more Monotony in a gluten-free (GF) diet can be a challenge because of a limited choice of acceptable cereal sources. This study investigates the potential of five types of differently coloured lentils in the development of GF cookies using rice flour as a reference. Raw materials (lentil flours) and cookies were characterised in terms of physicochemical parameters (e.g., crude protein content, total phenolics and flavonoids, antioxidant properties, colour, pH); additionally, geometry, baking loss and texture profile were determined for the cookies. A sensory acceptance test was also conducted to find out consumer preferences regarding rice versus different lentil cookies. Results showed that lentil cookies were superior to rice control in terms of higher crude protein (12.1–14.8 vs. 3.8 g/100 g), phenolic (136.5–342.3 vs. 61.5 mg gallic acid equivalents/100 g) and flavonoid (23.8–75.9 vs. 13.1 mg catechin equivalents/100 g) content and antioxidant capacity (0.60–1.81 vs. 0.35 mmol trolo...
As one of the most often used natural sweeteners, honey has recently been reconsidered and more c... more As one of the most often used natural sweeteners, honey has recently been reconsidered and more commonly used. Although Hungary is one of the main honey exporter countries, data referring to Hungarian honeys is very limited. Our aim was to investigate the analytical, physical and rheological properties of different honey samples and use these attributes to identify their geographical and botanical origin. Our results show the application of colorimetry, analytical and rheological measurements might be a promising combination of affordable methods for authentication of honey origin, however, further experiments are proposed to build up a robust database.
In this study we aimed to investigate the effect of heat treatment on the spectral pattern of hon... more In this study we aimed to investigate the effect of heat treatment on the spectral pattern of honey using near infrared spectroscopy (NIRS). For the research, sunflower, bastard indigo, and acacia honeys were collected from entrusted beekeepers. The honeys were not subject to any treatment before. Samples were treated at 40 °C, 60 °C, 80 °C, and 100 °C for 60, 120, 180, and 240 min. This resulted in 17 levels, including the untreated control samples. The 5-hydroxymethylfurfural (HMF) content of the honeys was determined using the Winkler method. NIRS spectra were recorded using a handheld instrument. Data analysis was performed using ANOVA for the HMF content and multivariate analysis for the NIRS data. For the latter, PCA, PCA-LDA, and PLSR models were built (using the 1300–1600 nm spectral range) and the wavelengths presenting the greatest change induced by the perturbations of temperature and time intervals were collected systematically, based on the difference spectra and the we...
Honey is produced by honeybees from nectar, sap of plant parts, or the juicy material secreted by... more Honey is produced by honeybees from nectar, sap of plant parts, or the juicy material secreted by sucking insects living on trees. It is rich in nutritionally useful components, the occurrence of which highly depends on the botanical and geographical origin of honey. Our goal is to develop a new, rapid, and accurate combination of analytical methods for identification of botanical and geographical origin. Physicochemical parameters (pH, electrical conductivity, moisture, and ash content), colour (L*a*b*), and antioxidant properties were determined in addition to correlative techniques, such as electronic tongue and near infrared spectroscopy. For the statistical evaluation ANOVA, principal component analysis, and linear discriminant analysis were applied. Results showed significant differences (P<0.05) in physicochemical properties, colour, and antioxidant capacity according to the botanical origin of honeys. Electronic tongue (ET) and near infrared spectroscopy (NIR) techniques were useful in the identification of the botanical and geographical origin, showing generally good accuracy. The physicochemical parameters are important and can serve as reference methods, completing NIR and ET as target techniques, which are promising, but need further improvement for the determination of honey origin.
Heat treatment of honey is usually applied due to crystallized form is not preferred by the consu... more Heat treatment of honey is usually applied due to crystallized form is not preferred by the consumers and makes handling harder to producers and beekeepers. Our aim is to find a method that can detect heat treatment of honey even at lower levels. In the study honeys were heated at 40°C, 60°C, 80°C, 100°C for one, two, three and four hours. Moisture, pH, electrical conductivity, HMF, color were determined, and spectra of honeys were recorded with NIRS. Results showed that NIRS could distinguish the honeys heated at 40°C while HMF was able to detect higher than 60°C treatment at significant level.
The purpose of this review is to provide a critical evaluation of the nutritional and sensory pro... more The purpose of this review is to provide a critical evaluation of the nutritional and sensory properties of ancient wheats (spelt, emmer, einkorn, and kamut) and the methods used to analyze them. This paper provides a comprehensive overview of the main analytical methods applied to study the nutritional properties of ancient wheats. According to our findings, protein content was the most commonly studied macronutrient across all types of ancient wheat species. The article notes that einkorn bran showed the highest protein and ash content, which reveals the potential of ancient wheats to be more widely used in food products. Regarding the majority of amino acids in spelt wheat cultivars, the general trend in the data was rather consistent. This review also compares sensory evaluation methods for different wheat products made from ancient wheats, such as bread, pasta, cooked grains, porridge, snacks, and muffins. The various reported methods and panel sizes used prove that ancient whe...
This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY
Xanthohumol is a hop-derived flavonoid that has been widely examined for its health-protecting an... more Xanthohumol is a hop-derived flavonoid that has been widely examined for its health-protecting and antitumorigenic properties, but not yet in a natural beer matrix. The aim of the study was to investigate the antitumorigenic potential of a xanthohumol-enriched beer in vivo. Four groups of 4 × 10 nude mice were formed. Following the injection of HeLa tumorigenic cell lines, the treatment groups were administered a xanthohumol supplementation for 100 days, either dissolved in beer or in an ethanolic solution with the same alcohol strength as beer. The control groups received un-supplemented material. The terminal tumor masses, liver weights, and plasma antioxidant capacities (FRAP and ABTS methods) were measured. For the statistical analysis, a two-way ANOVA test was performed (p < 0.05). There were no statistically significant differences in tumor size between the groups. Xanthohumol did not induce higher levels of plasma antioxidant capacity, neither in beer nor in the water–etha...
Propolis (bee glue) is an extremely valuable “byproduct” of beekeeping. Its ingredients include m... more Propolis (bee glue) is an extremely valuable “byproduct” of beekeeping. Its ingredients include many bioactive substances that have a beneficial effect on the human body, which is why propolis has been used by mankind for thousands of years, mainly for medicinal and occasionally cosmetic purposes. Many medicinal and cosmetic products are still produced from the substance today. Its composition varies considerably depending on the geographical location and the health of the producing bees. Its most important components are polyphenolic compounds (phenolic acids, flavonoids, flavonoid esters, diterpenes, sesquiterpenes), lignans, aromatic aldehydes, alcohols, amino acids, fatty acids, organic acids, hydrocarbons, vitamins and minerals. Propolis can be considered a medicinal food. Extracts made from it possess antibacterial, antiviral and antifungal effects. Propolis, in limited quantities, is also suitable for human consumption. The safe dose of propolis for healthy people is 70 mg/da...
Hungarian fruit vinegars were characterised in terms of physicochemical attributes (total polyphe... more Hungarian fruit vinegars were characterised in terms of physicochemical attributes (total polyphenol content, antioxidant characteristics/FRAP, CUPRAC, ABTS/, ascorbic acid content, pH, total soluble solids), sensory profiles, and antimicrobial properties. Both compositional and sensory profiles showed distinct patterns depending on the type of vinegar (Tokaj wine, balsamic or apple) and the additional fruit used. Balsamic vinegars maturated on rosehip, sea buckthorn, and raspberry showed outstanding antioxidant performances. Rosehip, raspberry, and quince vinegars, as well as vinegars produced from Tokaji aszú and balsamic apple obtained high scores for fruity and sweet notes. Antimicrobial activities were tested on Gram-negative and Gram-positive organisms, including probiotic bacteria. Generally, only weak activities were obtained, which was attributed to the natural sugar content of the samples, depending on the type of the vinegar and the fruit. Similar results, but more pronou...
Honey adulteration is a worldwide problem; however, its detection is a challenge for researchers ... more Honey adulteration is a worldwide problem; however, its detection is a challenge for researchers and authorities. There are numerous ways of honey counterfeiting; amongst them, direct adulteration is one of the most common methods. Correlative techniques, such as near-infrared spectroscopy (NIRS), are useful tools in the detection of honey adulteration; however, this method has not been applied to Hungarian honeys. The aim of this research was to investigate the performance of NIRS for the detection of sugar syrup addition to Hungarian honeys at lower concentration levels (<10% w/w). Acacia, rape, forest, sunflower, and linden honeys were mixed with high-fructose-content sugar syrup, rice syrup, or self-made glucose fructose syrup in 3%, 5%, and 10% w/w. NIRS analysis was performed in the spectral range of 950–1650 nm. Principal component analysis was coupled with linear discriminant analysis and partial least square regression models were built for the classification and predict...
A propolisz (méhszurok) a méhészetek rendkívül értékes „melléktermékei”. Összetevői között számos... more A propolisz (méhszurok) a méhészetek rendkívül értékes „melléktermékei”. Összetevői között számos, az emberi szervezetre előnyös hatást gyakorló bioaktív anyag található, ezért a propoliszt az emberiség több évezrede használja elsősorban gyógyászati, esetenként kozmetikai célokra. E vegyületből napjainkban is számos, gyógyszer- és kozmetikai készítményt állítanak elő. Összetétele a földrajzi helytől, az előállító méhek egészségi állapotától függően számottevően változó. Fontosabb összetevői a polifenolos vegyületek (fenolsavak, flavonoidok, flavonoid-észterek, diterpének, szeszkviterpének), lignánok, aromás aldehidek, alkoholok, aminosavak, zsírsavak, szerves savak, szénhidrogének, vitaminok és ásványi anyagok. A propolisz gyógyhatású élelmiszernek tekinthető. A belőle készült kivonatok antibakteriális, antivirális és gombaölő hatással rendelkeznek. A propolisz – korlátozott mennyiségben – emberi fogyasztásra is alkalmas. A propolisz biztonságos dózisa egészséges emberek számára 70 ...
Monotony in a gluten-free (GF) diet can be a challenge because of a limited choice of acceptable ... more Monotony in a gluten-free (GF) diet can be a challenge because of a limited choice of acceptable cereal sources. This study investigates the potential of five types of differently coloured lentils in the development of GF cookies using rice flour as a reference. Raw materials (lentil flours) and cookies were characterised in terms of physicochemical parameters (e.g., crude protein content, total phenolics and flavonoids, antioxidant properties, colour, pH); additionally, geometry, baking loss and texture profile were determined for the cookies. A sensory acceptance test was also conducted to find out consumer preferences regarding rice versus different lentil cookies. Results showed that lentil cookies were superior to rice control in terms of higher crude protein (12.1–14.8 vs. 3.8 g/100 g), phenolic (136.5–342.3 vs. 61.5 mg gallic acid equivalents/100 g) and flavonoid (23.8–75.9 vs. 13.1 mg catechin equivalents/100 g) content and antioxidant capacity (0.60–1.81 vs. 0.35 mmol trolo...
As one of the most often used natural sweeteners, honey has recently been reconsidered and more c... more As one of the most often used natural sweeteners, honey has recently been reconsidered and more commonly used. Although Hungary is one of the main honey exporter countries, data referring to Hungarian honeys is very limited. Our aim was to investigate the analytical, physical and rheological properties of different honey samples and use these attributes to identify their geographical and botanical origin. Our results show the application of colorimetry, analytical and rheological measurements might be a promising combination of affordable methods for authentication of honey origin, however, further experiments are proposed to build up a robust database.
In this study we aimed to investigate the effect of heat treatment on the spectral pattern of hon... more In this study we aimed to investigate the effect of heat treatment on the spectral pattern of honey using near infrared spectroscopy (NIRS). For the research, sunflower, bastard indigo, and acacia honeys were collected from entrusted beekeepers. The honeys were not subject to any treatment before. Samples were treated at 40 °C, 60 °C, 80 °C, and 100 °C for 60, 120, 180, and 240 min. This resulted in 17 levels, including the untreated control samples. The 5-hydroxymethylfurfural (HMF) content of the honeys was determined using the Winkler method. NIRS spectra were recorded using a handheld instrument. Data analysis was performed using ANOVA for the HMF content and multivariate analysis for the NIRS data. For the latter, PCA, PCA-LDA, and PLSR models were built (using the 1300–1600 nm spectral range) and the wavelengths presenting the greatest change induced by the perturbations of temperature and time intervals were collected systematically, based on the difference spectra and the we...
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