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Jiří Mlček
Department of Food Analysis and Chemistry, Faculty of Technology, Tomas Bata University in Zlin, Vavreckova 275, CZ-76001 Zlin, Czech Republic

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Journal article
Published: 23 July 2021 in Sustainability
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Peppers are cultivated in almost all provinces in Turkey, making up approximately 7% of the world’s production. In this study, the effects of pre-harvest cytokinin application on the postharvest physiology of pepper (Capsicum annuum L.) fruits (cv. Akra and Melek F1) grown in ecological conditions in Turkey (Van, eastern Turkey) were investigated. During the growing period, organic cytokinin(nytrozine) at two concentrations (50 and 100 ppm doses) was applied by spraying. Peppers were harvested in green maturity and then stored at 12 °C for 28 days. Changes in color, respiration rate, exogenous ethylene amount, antioxidative enzyme analysis (SOD, CAT and APX), lipid peroxidation, total phenolic content (TP) and antioxidant activity (AA) were determined just after the harvest and then at the 7th, 14th, 24th and 28th days. L* values for both varieties and the control sample had fluctuations during storage, and they slightly decreased after 28 days, except for the end value of cv. Melek F1 with a 50 ppm addition. In terms of respiration rate values, the difference between applications was found to be statistically significant, except for the 14th and 24th days of storage, for cv. Akra F1; and the 0th and 28th days for cv. Melek F1, respectively. It was observed that cytokinin can delay aging in peppers of both cultivars stored for 28 days. As a result, as the used cytokinin has an organic origin, is not synthetic and does not have a negative effect on human health, it can be used safely and without a significant loss of quality characteristics for peppers. These applications have positive effects on in-package gas composition, antioxidative enzymes, lipid peroxidation, total phenolics and total antioxidant activity.

ACS Style

Seyda Cavusoglu; Suat Sensoy; Arzu Karatas; Onur Tekin; Firat Islek; Nurettin Yilmaz; Selma Kipcak; Sezai Ercisli; Sona Skrovankova; Anna Adamkova; Jiri Mlcek. Effect of Pre-Harvest Organic Cytokinin Application on the Post-Harvest Physiology of Pepper (Capsicum annuum L.). Sustainability 2021, 13, 8258 .

AMA Style

Seyda Cavusoglu, Suat Sensoy, Arzu Karatas, Onur Tekin, Firat Islek, Nurettin Yilmaz, Selma Kipcak, Sezai Ercisli, Sona Skrovankova, Anna Adamkova, Jiri Mlcek. Effect of Pre-Harvest Organic Cytokinin Application on the Post-Harvest Physiology of Pepper (Capsicum annuum L.). Sustainability. 2021; 13 (15):8258.

Chicago/Turabian Style

Seyda Cavusoglu; Suat Sensoy; Arzu Karatas; Onur Tekin; Firat Islek; Nurettin Yilmaz; Selma Kipcak; Sezai Ercisli; Sona Skrovankova; Anna Adamkova; Jiri Mlcek. 2021. "Effect of Pre-Harvest Organic Cytokinin Application on the Post-Harvest Physiology of Pepper (Capsicum annuum L.)." Sustainability 13, no. 15: 8258.

Journal article
Published: 28 May 2021 in Potravinarstvo Slovak Journal of Food Sciences
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During the lifetime, the human body forms a considerable amount of free radicals damaging DNA, cell membranes, and their components. A wider application of basil (Ocimum basilicum), an aromatic plant and one of the common gastronomic commodities in the human diet could help to prevent the formation of free radicals and to remove them from the human body. Therefore, determination of antioxidant activity and total content of phenolic substances in selected cultivars of basil (Ohře, Sweet green, Salad leaf, Purple opal, Thai) in a fresh and frozen state and the mixture with another plant (garlic, mint, rocket, spinach) in the fresh and refrigerated state was performed. The total content of phenolic substances in basil was established by the spectrophotometric Folin-Ciocalteu method. DPPH spectrophotometric method was used to analyze the antioxidant activity. The results have shown statistically significant differences between basil cultivars under the same growing conditions. The values of antioxidant activity in frozen samples ranged from 5.1 ±0.4 mg.g-1 AA FW to 11.71 ±0.18 mg.g-1 AA FW and the total phenolic content varied between 2.77 ±0.16 mg.g-1 GAE FW in TH and 8.93 ±0.13 mg.g-1 GAE FW. A statistically significant difference between fresh and frozen samples was established only in the “Ohře” cultivar. After the storage in cold temperatures, all mixtures showed a reduction in the antioxidant activity and total content of phenolic substances. The mixture of basil and mint performed the highest values of antioxidant activity and total content of phenolic substances and significantly differed from the other mixtures most often. The addition of basil and its mixtures to food and beverages can substantially increase their biological value and subsequently also the quality of human nutrition.

ACS Style

Martin Adámek; Jiří Mlček; Anna Adámková; Vít Guiglielmo Mišurec; Jana Orsavová; Martina Bučková; Martin Búran; Anna Plášková; Lenka Kouřimská. Basil – a comparison of the total phenolic content and antioxidant activity in selected cultivars. Potravinarstvo Slovak Journal of Food Sciences 2021, 15, 445 -452.

AMA Style

Martin Adámek, Jiří Mlček, Anna Adámková, Vít Guiglielmo Mišurec, Jana Orsavová, Martina Bučková, Martin Búran, Anna Plášková, Lenka Kouřimská. Basil – a comparison of the total phenolic content and antioxidant activity in selected cultivars. Potravinarstvo Slovak Journal of Food Sciences. 2021; 15 ():445-452.

Chicago/Turabian Style

Martin Adámek; Jiří Mlček; Anna Adámková; Vít Guiglielmo Mišurec; Jana Orsavová; Martina Bučková; Martin Búran; Anna Plášková; Lenka Kouřimská. 2021. "Basil – a comparison of the total phenolic content and antioxidant activity in selected cultivars." Potravinarstvo Slovak Journal of Food Sciences 15, no. : 445-452.

Journal article
Published: 08 January 2021 in Plants
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In recent years, significant portions of the fresh fruits and vegetables produced worldwide have been decaying before reaching the consumer because of insufficient preservation after harvest. In this direction, we carried the study out to investigate the effect of gibberellic acid (GA3) and 1-methyl cyclopropane (1-MCP) applications on phenolic compounds and organic acid contents of the strawberry fruits (cv. Albion) during shelf-life. Gibberellic acid treatments, which prepared in two different concentrations (50 and 100 ppm), were performed by spraying the leaves before harvest. 1-methyl cyclopropane applied after harvest. The results of the study showed a greater decrease in organic acids (except oxalic and succinic acid) in Gibberellic acid-applied fruits during shelf-life. Citric acid was recorded as the most abundant organic acid in the control group. In phenolic compounds, gallic acid (15.22 mg 100 g−1) and ellagic acid (9.38 mg 100 g−1) were recorded as the highest phenolic compounds on the third day. 1-MCP and GA3 (50 ppm) + 1-MCP treatment reduced the breakdown of vitamin C during the shelf-life of strawberry fruits compared to the control group. As a result, phenolic compounds, vitamin C, and organic acids decreased during the shelf-life, and 1-MCP applications slowed down the breakdown of these compounds.

ACS Style

Akgül Taş; Selma Kuru Berk; Erdal Orman; Muttalip Gundogdu; Sezai Ercişli; Neva Karatas; Tunde Jurikova; Anna Adamkova; Sarka Nedomova; Jiri Mlcek. Influence of Pre-Harvest Gibberellic Acid and Post-Harvest 1-Methyl Cyclopropane Treatments on Phenolic Compounds, Vitamin C and Organic Acid Contents During the Shelf Life of Strawberry Fruits. Plants 2021, 10, 121 .

AMA Style

Akgül Taş, Selma Kuru Berk, Erdal Orman, Muttalip Gundogdu, Sezai Ercişli, Neva Karatas, Tunde Jurikova, Anna Adamkova, Sarka Nedomova, Jiri Mlcek. Influence of Pre-Harvest Gibberellic Acid and Post-Harvest 1-Methyl Cyclopropane Treatments on Phenolic Compounds, Vitamin C and Organic Acid Contents During the Shelf Life of Strawberry Fruits. Plants. 2021; 10 (1):121.

Chicago/Turabian Style

Akgül Taş; Selma Kuru Berk; Erdal Orman; Muttalip Gundogdu; Sezai Ercişli; Neva Karatas; Tunde Jurikova; Anna Adamkova; Sarka Nedomova; Jiri Mlcek. 2021. "Influence of Pre-Harvest Gibberellic Acid and Post-Harvest 1-Methyl Cyclopropane Treatments on Phenolic Compounds, Vitamin C and Organic Acid Contents During the Shelf Life of Strawberry Fruits." Plants 10, no. 1: 121.

Journal article
Published: 31 December 2020 in Agronomy
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Total polyphenols content (TPC), antioxidant activity (AA) and polyphenolic spectrum assay of three underutilized fruit species—black crowberry (Empetrum nigrum), honeyberry (Lonicera kamtschatica) and European cranberry (Vaccinium oxycoccos) is the aim of the present work. TPC and AA assay was performed by spectrophotometry and “individual phenolic compounds” were established by high-performance liquid chromatography. The results showed that TPC ranged from 1.61 ± 0.16 (European cranberry) up to 5.65 ± 0.01 (Black cowberry) gallic acid mg/g fresh weight. The highest value of DPPH (2,2-diphenyl-1-picrylhydrazyl) free radical scavenging assay was determined in black crowberry fruit (7.43 ± 0.34 mmol TROLOX/g fresh weight of fruit). In all samples, the most prevalent phenolic acid was ferulic acid with the highest content in the samples of black crowberry (77.73 ± 3.99 µg/g FW of fruit), black crowberry and honeyberry were present by the highest level of gallic acid (21.82 ± 1.53; 15.07 ± 2.45 µg/g FW of fruit). Honeyberry represented a valuable source of quercetin (12.18 ± 7.88 µg/g FW of fruit), whereas European cranberry and honeyberry are a source of rutin (28.48 ± 0.83 and 27.99 ± 1.78 µg/g FW of fruit, respectively). The results of statistical analyses proved significant differences between cowberry and European cranberry in TPC content and in AA among assayed species. In the same way, statistically significant differences were confirmed in phenolic acids among the assayed species except for European cranberry-honeyberry (in trans p-coumaric, protocatequic and cinnamic acid) and honeyberry-cowberry (in cinnamic acid content). The catechin content is significantly influenced by species (p ≤ 0.05), on the other hand the species has no influence on the resveratrol content (p > 0.05). Each of the studied species can be considered as valuable source of total polyphenols and individual phenolic compounds. Polyphenolic compounds were most frequently accumulated in the vacuole as well as in the outer layers of pericarp.

ACS Style

Tünde Juríková; Jiří Mlček; Štefan Balla; Monika Ondrášová; Libor Dokoupil; Jiří Sochor; L’Uba Ďurišová; Jr. Pavol Eliáš; Anna Adámková; Mojmír Baroň; Sezai Ercisli. The Elucidation of Total Polyphenols, Individual Phenolic Compounds, Antioxidant Activity of Three Underutilized Fruit Species—Black Crowberry, Honeyberry, European Cranberry with Their Accumulation. Agronomy 2020, 11, 73 .

AMA Style

Tünde Juríková, Jiří Mlček, Štefan Balla, Monika Ondrášová, Libor Dokoupil, Jiří Sochor, L’Uba Ďurišová, Jr. Pavol Eliáš, Anna Adámková, Mojmír Baroň, Sezai Ercisli. The Elucidation of Total Polyphenols, Individual Phenolic Compounds, Antioxidant Activity of Three Underutilized Fruit Species—Black Crowberry, Honeyberry, European Cranberry with Their Accumulation. Agronomy. 2020; 11 (1):73.

Chicago/Turabian Style

Tünde Juríková; Jiří Mlček; Štefan Balla; Monika Ondrášová; Libor Dokoupil; Jiří Sochor; L’Uba Ďurišová; Jr. Pavol Eliáš; Anna Adámková; Mojmír Baroň; Sezai Ercisli. 2020. "The Elucidation of Total Polyphenols, Individual Phenolic Compounds, Antioxidant Activity of Three Underutilized Fruit Species—Black Crowberry, Honeyberry, European Cranberry with Their Accumulation." Agronomy 11, no. 1: 73.

Review
Published: 14 November 2020 in Molecules
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This review is focused on the study of the effects of grape seed and skin extract (GSSE) on human health. GSSE contains high concentrations of important polyphenolic substances with high biological activity. This review is a summary of studies that investigate the effects of GSSE on diabetes mellitus, cardiovascular disease and cancer, its neuroprotective effect, and its effects on the gastrointestinal tract and other health complications related to these diseases. The results of the studies confirm that the anti-inflammatory, antiapoptotic, and pro-proliferative effects of “Vitis vinifera L.” seed extract reduce the level of oxidative stress and improve the overall lipid metabolism.

ACS Style

Lenka Sochorova; Bozena Prusova; Martina Cebova; Tunde Jurikova; Jiri Mlcek; Anna Adamkova; Sarka Nedomova; Mojmir Baron; Jiri Sochor. Health Effects of Grape Seed and Skin Extracts and Their Influence on Biochemical Markers. Molecules 2020, 25, 5311 .

AMA Style

Lenka Sochorova, Bozena Prusova, Martina Cebova, Tunde Jurikova, Jiri Mlcek, Anna Adamkova, Sarka Nedomova, Mojmir Baron, Jiri Sochor. Health Effects of Grape Seed and Skin Extracts and Their Influence on Biochemical Markers. Molecules. 2020; 25 (22):5311.

Chicago/Turabian Style

Lenka Sochorova; Bozena Prusova; Martina Cebova; Tunde Jurikova; Jiri Mlcek; Anna Adamkova; Sarka Nedomova; Mojmir Baron; Jiri Sochor. 2020. "Health Effects of Grape Seed and Skin Extracts and Their Influence on Biochemical Markers." Molecules 25, no. 22: 5311.

Journal article
Published: 06 November 2020 in Processes
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By-products of laying hens represent a promising raw material source with a high collagen content, which is currently not adequately used. The aim of the paper is to prepare gelatins from laying hen paws. The purified collagen raw material was processed by a biotechnological process using the food endoprotease Protamex®. After cleavage of the cross-links in the collagen structure, the gelatin was extracted by a batch process with a stirrer in two extraction steps. The influence of the extraction process on the yield of gelatins and on selected qualitative parameters of gelatins was monitored by two-level factor experiments with three selected process factors. The studied factors were: enzyme dosage (0.2–0.8%), enzyme processing time (24–72 h) and gelatin extraction time (30–120 min). After the first extraction step at 75 °C, gelatin was extracted with a yield of 8.2–21.4% and a gel strength of 275–380 Bloom. In the second extraction step at 80–100 °C, it is possible to obtain another portion (3.3–7.7%) of gelatin with a gel strength of 185–273 Bloom. Total extraction efficiency of gelatins prepared from laying hen collagen is almost 30%. The prepared gelatins are of high quality and, under proper extraction conditions, gelatins with a gel strength above 300 Bloom can be prepared, thus equaling commercial beef and pork gelatins of the highest quality. Biotechnological processing of laying hen collagen into gelatins is environmentally friendly.

ACS Style

Robert Gál; Pavel Mokrejš; Jana Pavlačková; Ngo Thi Hong Linh; Jiří Mlček. Biotechnological Processing of Laying Hen Paw Collagen into Gelatins. Processes 2020, 8, 1415 .

AMA Style

Robert Gál, Pavel Mokrejš, Jana Pavlačková, Ngo Thi Hong Linh, Jiří Mlček. Biotechnological Processing of Laying Hen Paw Collagen into Gelatins. Processes. 2020; 8 (11):1415.

Chicago/Turabian Style

Robert Gál; Pavel Mokrejš; Jana Pavlačková; Ngo Thi Hong Linh; Jiří Mlček. 2020. "Biotechnological Processing of Laying Hen Paw Collagen into Gelatins." Processes 8, no. 11: 1415.

Journal article
Published: 28 October 2020 in Potravinarstvo Slovak Journal of Food Sciences
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This paper discusses the sensory analysis of food enriched with selected edible insect species which are labelled as a novel food – house cricket (Acheta domesticus) and mealworm (Tenebrio molitor). Energy bars of two different compositions with the addition of cricket flour and puff pastry bars sprinkled with the whole roasted mealworm larvae were evaluated by consumer tests performed via a questionnaire survey. Respondents represented both men and women in equal numbers and included consumers with the experience of the sensory analysis and edible insects to ensure accurate results. Sensory analyses revealed that respondents associated their tastes with already known flavors (salty, sweet, bitter, fish, French fries, chicken, and mushrooms). The most common answer from respondents was a salty taste, followed by a sweet taste. There were also unusual comparisons such as pine seeds. Consumers’ positive attitude to these energy bars has been registered which shows that the Czech consumer accepts edible insects in a suitable form as a novel food and possible part of the food basket.

ACS Style

Martin Adámek; Anna Adámková; Lenka Kouřimská; Jiří Mlček; Klára Vojáčková; Jana Orsavová; Martina Bučková; Oldřich Faměra; Martin Búran. Sensory evaluation and acceptance of food made of edible insects. Potravinarstvo Slovak Journal of Food Sciences 2020, 14, 921 -928.

AMA Style

Martin Adámek, Anna Adámková, Lenka Kouřimská, Jiří Mlček, Klára Vojáčková, Jana Orsavová, Martina Bučková, Oldřich Faměra, Martin Búran. Sensory evaluation and acceptance of food made of edible insects. Potravinarstvo Slovak Journal of Food Sciences. 2020; 14 ():921-928.

Chicago/Turabian Style

Martin Adámek; Anna Adámková; Lenka Kouřimská; Jiří Mlček; Klára Vojáčková; Jana Orsavová; Martina Bučková; Oldřich Faměra; Martin Búran. 2020. "Sensory evaluation and acceptance of food made of edible insects." Potravinarstvo Slovak Journal of Food Sciences 14, no. : 921-928.

Journal article
Published: 28 September 2020 in Potravinarstvo Slovak Journal of Food Sciences
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A healthy lifestyle and gastronomic trends based on traditional and local foods accompanied by waste-free technologies are currently in the primary focus. One of the raw materials with properties in alignment with such requirements is grape pomace. This paper evaluates the antioxidant activity of grape pomace (which is homogenized into a brown powder) and selected commonly available commercial flours – wheat bread, rye plain, and rye whole grain flour – using DPPH (2,2‑diphenyl-1-picryl-hydrazyl-hydrate) and total polyphenol content method, where was used Folin-Ciocalteaure agent and then it was determined by spectrophotometric method (the measure of absorbance). The total amount of polyphenols in grape pomace was measured of 47.94 mg GAE.g-1, but the value 0.27 mg GAE.g-1 was measured in wheat bread flour. Grape pomace performed the antioxidant activity of 57.45 mg AAE.g-1, whereas wheat bread flour of only 0.21 mg AAE.g‑1 Compared to selected commercial flours, the total amount of polyphenols in grape pomace was up to 150 times higher and the ratio of antioxidant activity between grape pomace and wheat bread flour was even more than 280 times higher. This makes it possible to fortify commercial, commonly available flours with different amount of grape pomace so that products with a higher amount of biologically active substances can be prepared. Another benefit could be a reduction in health risks and a contribution to improving consumer health.

ACS Style

Klára Vojáčková; Jiří Mlček; Soňa Škrovánková; Anna Adámková; Martin Adámek; Jana Orsavová; Martina Bučková; Vlastimil Fic; Lenka Kouřimská; Martin Búran. Biologically active compounds contained in grape pomace. Potravinarstvo Slovak Journal of Food Sciences 2020, 14, 854 -861.

AMA Style

Klára Vojáčková, Jiří Mlček, Soňa Škrovánková, Anna Adámková, Martin Adámek, Jana Orsavová, Martina Bučková, Vlastimil Fic, Lenka Kouřimská, Martin Búran. Biologically active compounds contained in grape pomace. Potravinarstvo Slovak Journal of Food Sciences. 2020; 14 ():854-861.

Chicago/Turabian Style

Klára Vojáčková; Jiří Mlček; Soňa Škrovánková; Anna Adámková; Martin Adámek; Jana Orsavová; Martina Bučková; Vlastimil Fic; Lenka Kouřimská; Martin Búran. 2020. "Biologically active compounds contained in grape pomace." Potravinarstvo Slovak Journal of Food Sciences 14, no. : 854-861.

Journal article
Published: 28 September 2020 in Potravinarstvo Slovak Journal of Food Sciences
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This study aimed to compare chemical properties, in terms of the content of volatile substances, antioxidant compounds, and antioxidant activity (AOA), in samples of fruit and grape wines. For this purpose, the following types of wine were selected, namely fruit wines (apple, strawberry, and elderberry) and grape wines (Müller-Thurgau, St. Lawrence Rosé, and Blue Portugal). Basic analyses of fruit and grape wines were conducted by using the ALPHA method and volatile substances in wines were determined by the GS/MC method. The antioxidant content and AOA were estimated by spectrophotometry, using two types of DPPH method. The results of the experiment showed that the highest values of antioxidant compounds (anthocyanins and flavanols) were found in the samples of Blue Portugal wine and elderberry wine. Significant differences were determined among the wines in antioxidant content, which may have been influenced by the production technology. The results showed that the alcohol content of the wines ranged from 10.99% to 19.49% vol. The highest alcohol content was measured in the elderberry wine samples and the lowest in those of the apple wine. The strawberry wine had the highest titratable acid content, which corresponded to a pH of 3.38. The lowest content was measured in the apple wine samples. Due to the higher acid content of the strawberry wine, a higher residual sugar level of 46.9 g.L-1 was obtained. We noted that the red fruit wines contained a higher proportion of valuable bioactive substances than white grape wines. Wines with superior sensory properties did not contain higher levels of antioxidants or higher AOA. The research results can provide a helpful reference for the widespread use of grape and fruit wines in medical, nutritional, and other fields.

ACS Style

Marcela Cehula; Mojmir Baron; Tunde Jurikova; Adrian Alumbro; Methusela Perrocha; Ivo Ondrasek; Jiri Mlcek; Anna Adamkova; Jiri Sochor. The study of selected components of grape and fruit wines. Potravinarstvo Slovak Journal of Food Sciences 2020, 14, 759 -766.

AMA Style

Marcela Cehula, Mojmir Baron, Tunde Jurikova, Adrian Alumbro, Methusela Perrocha, Ivo Ondrasek, Jiri Mlcek, Anna Adamkova, Jiri Sochor. The study of selected components of grape and fruit wines. Potravinarstvo Slovak Journal of Food Sciences. 2020; 14 ():759-766.

Chicago/Turabian Style

Marcela Cehula; Mojmir Baron; Tunde Jurikova; Adrian Alumbro; Methusela Perrocha; Ivo Ondrasek; Jiri Mlcek; Anna Adamkova; Jiri Sochor. 2020. "The study of selected components of grape and fruit wines." Potravinarstvo Slovak Journal of Food Sciences 14, no. : 759-766.

Journal article
Published: 01 September 2020 in Journal of Insect Science
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The present study dealt with the influence of temperature and feed on the nutritional value of Tenebrio molitor, especially on the content of crude protein, amino acids, fat, and fatty acid profile. Tenebrio molitor larvae were kept in 15, 20, and 25°C and fed with wheat bran, lentil flour, and mixture. The parameters were analyzed by international standard methods. Generally, with an increase of the lentils in the feed, the crude protein content increased. The changes in the temperature and the feed were most pronounced on the essential amino acids Val, Arg, and Leu. The highest average fat content was determined at 20°C in insects fed with wheat bran. The lowest fat content was determined at 15°C in bran-fed insects. The dependency of fat content on the temperature in feeding with lentil flour and a mixture of wheat bran and lentil flour was statistically insignificant (P > 0.05, Kruskal–Wallis, Mann–Whitney post hoc tests). The highest content of polyene fatty acids was achieved at a rearing temperature of 15°C and the bran diet. It was concluded that a higher proportion of protein diet could increase the content of crude protein in the insects. An increase in the temperature generally leads only to a slight increase in the content of nitrogenous substances. The influence of feed on this nutritional parameter is therefore much more significant than the effect of the rearing temperature. In general, it can be stated that the feed and the temperature also significantly affect the fat content.

ACS Style

Anna Adámková; Jiří Mlček; Martin Adámek; Marie Borkovcová; Martina Bednářová; Veronika Hlobilová; Ivana Knížková; Tunde Juríková. Tenebrio molitor (Coleoptera: Tenebrionidae)—Optimization of Rearing Conditions to Obtain Desired Nutritional Values. Journal of Insect Science 2020, 20, 1 .

AMA Style

Anna Adámková, Jiří Mlček, Martin Adámek, Marie Borkovcová, Martina Bednářová, Veronika Hlobilová, Ivana Knížková, Tunde Juríková. Tenebrio molitor (Coleoptera: Tenebrionidae)—Optimization of Rearing Conditions to Obtain Desired Nutritional Values. Journal of Insect Science. 2020; 20 (5):1.

Chicago/Turabian Style

Anna Adámková; Jiří Mlček; Martin Adámek; Marie Borkovcová; Martina Bednářová; Veronika Hlobilová; Ivana Knížková; Tunde Juríková. 2020. "Tenebrio molitor (Coleoptera: Tenebrionidae)—Optimization of Rearing Conditions to Obtain Desired Nutritional Values." Journal of Insect Science 20, no. 5: 1.

Journal article
Published: 15 August 2020 in Molecules
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The paper deals with the study of antioxidant properties of extracts from vine seeds (Vitis vinifera L.) using spectrometric and chromatographic techniques. Ten vine varieties (Cerason, Laurot, Kofranka, Gewürztraminer, Hibernal, Blaufrankisch, Zweigeltrebe, Erilon, Palava, and Welschriesling) obtained from the years 2015, 2016, and 2017 were selected for the study. The antioxidant activity was determined spectrophotometrically using four fundamentally different methods; the content of total polyphenolic compounds was determined using the Folin–Ciocalteu method. In 2015, the content of 14 antioxidants (gallic acid, caffeic acid, coumaric acid, coutaric acid, ferulic acid, fertaric acid, trans-piceid, trans-piceatannol, rutin, quercetin-3-β-d-glucoside, quercitrin, myricetin, catechin, and epicatechin) were studied. The results of the study show the high content of antioxidant components in grape seeds and the differences in content in individual varieties and in individual years.

ACS Style

Lenka Sochorova; Bozena Prusova; Tunde Jurikova; Jiri Mlcek; Anna Adamkova; Mojmir Baron; Jiri Sochor. The Study of Antioxidant Components in Grape Seeds. Molecules 2020, 25, 3736 .

AMA Style

Lenka Sochorova, Bozena Prusova, Tunde Jurikova, Jiri Mlcek, Anna Adamkova, Mojmir Baron, Jiri Sochor. The Study of Antioxidant Components in Grape Seeds. Molecules. 2020; 25 (16):3736.

Chicago/Turabian Style

Lenka Sochorova; Bozena Prusova; Tunde Jurikova; Jiri Mlcek; Anna Adamkova; Mojmir Baron; Jiri Sochor. 2020. "The Study of Antioxidant Components in Grape Seeds." Molecules 25, no. 16: 3736.

Journal article
Published: 29 June 2020 in Acta Scientiarum Polonorum Hortorum Cultus
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The formation and development of reproductive organs and fruits was examined for two edible honeysuckle species Lonicera edulis Turcz. ex. Freyn. and Lonicera kamtchatica (Sevast.) Pojark. ‘Gerda’ using cytological and embryological methods. We found out that the flower initiation has began during June in the conditions of southwestern Slovakia. Male and female archespores were differentiated before entering winter dormancy. In most cases we have observed normally developed tetrads, normal appearance of microspores, two-celled polen grains and mature pollen grain. In both species a sufficient amount of normally developed pollen grains was observed. Disturbances during female gametophyte development occurred occasionally, most mature ovules contained 7 cells female gametophyte. Our research pointed to fact that the species are protogynous. Flowering usually takes place in the first half of April. The fruits were mature in the second half of May. We have found that 10 to 11 fully developed seeds have evolved in the fruits of both representatives of Lonicera on average. The above results show the suitability of L. edulis and L. kamtchatica cultivation in SW Slovakia with a relatively low risk of fruit loss due to climatic conditions.

ACS Style

Ľuba Ďurišová; Tünde Juríková; Pavol Jr Eliáš; Jiri Mlcek. REPRODUCTIVE BIOLOGY OF TWO EDIBLE HONEYSUCKLES [Lonicera edulis Turcz. ex Freyn., Lonicera kamtchatica (Sevast.) Pojark.] IN THE CONDITIONS OF SOUTHWESTERN SLOVAKIA. Acta Scientiarum Polonorum Hortorum Cultus 2020, 19, 63 -72.

AMA Style

Ľuba Ďurišová, Tünde Juríková, Pavol Jr Eliáš, Jiri Mlcek. REPRODUCTIVE BIOLOGY OF TWO EDIBLE HONEYSUCKLES [Lonicera edulis Turcz. ex Freyn., Lonicera kamtchatica (Sevast.) Pojark.] IN THE CONDITIONS OF SOUTHWESTERN SLOVAKIA. Acta Scientiarum Polonorum Hortorum Cultus. 2020; 19 (3):63-72.

Chicago/Turabian Style

Ľuba Ďurišová; Tünde Juríková; Pavol Jr Eliáš; Jiri Mlcek. 2020. "REPRODUCTIVE BIOLOGY OF TWO EDIBLE HONEYSUCKLES [Lonicera edulis Turcz. ex Freyn., Lonicera kamtchatica (Sevast.) Pojark.] IN THE CONDITIONS OF SOUTHWESTERN SLOVAKIA." Acta Scientiarum Polonorum Hortorum Cultus 19, no. 3: 63-72.

Journal article
Published: 28 June 2020 in Potravinarstvo Slovak Journal of Food Sciences
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Pseudocereals are important as gluten-free crops that could be utilized as functional foods. They contain proteins with high biological value and also bioactive compounds such as phenolic compounds, flavonoids, vitamins, and minerals that can possess positive health effects on the body. Three types of pseudocereals (amaranth, buckwheat, and quinoa) were evaluated for polyphenols and antioxidant activity. Spectrophotometric methods were used for the determination of free phenols amount with Folin-Ciocalteu reagent, and total antioxidant capacity (TAC) with DPPH and ABTS reagents. Free phenols, the predominant part of polyphenols, were in pseudocereals in the range from 12.4 to 678.1 mg GAE.100g-1. The highest content of FP was found in buckwheat products (146.8 ”“ 678.1 mg GAE.100g-1); quinoa and amaranth products reached much lower values (up to 226.1 mg GAE.100g-1). Antioxidant activity was in an agreement with the FP amounts order, the highest TAC values were again for buckwheat products (167.3 ”“ 473.9 and 876.9 ”“ 3524.8 mg TE.100g-1), followed by quinoa (78.2 ”“ 100.6 and 738.9 ”“ 984.5 mg TE.100g-1) and amaranth ones (25.0 ”“ 69.7 and 118.2 ”“ 431.4 mg TE.100g-1). A high positive correlation between FP amount and TAC values was evaluated for analyzed pseudocereals. The highest content of free phenols and the best antioxidant potential showed buckwheat wholemeal flour, so buckwheat could be characterized as a great source of free phenols with high antioxidant activity.

ACS Style

Soňa Škrovánková; Dagmar Válková; Jiří­ Mlček. Polyphenols and antioxidant activity in pseudocereals and their products. Potravinarstvo Slovak Journal of Food Sciences 2020, 14, 365 -370.

AMA Style

Soňa Škrovánková, Dagmar Válková, Jiří­ Mlček. Polyphenols and antioxidant activity in pseudocereals and their products. Potravinarstvo Slovak Journal of Food Sciences. 2020; 14 ():365-370.

Chicago/Turabian Style

Soňa Škrovánková; Dagmar Válková; Jiří­ Mlček. 2020. "Polyphenols and antioxidant activity in pseudocereals and their products." Potravinarstvo Slovak Journal of Food Sciences 14, no. : 365-370.

Journal article
Published: 24 June 2020 in Sensors
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The present article dealt with the fortification of plain wheat flour by the addition of grape pomace flour and mealworm larvae powder, focusing on the mineral content and selected properties of the dough. The work also analyzed the properties of one mixture in a weight combination of 80% wheat flour, 10% grape pomace, and 10% mealworm. X-ray analysis was used to measure the mineral content of calcium, iron, copper, and zinc. The properties of the individual mixture were monitored using an experimental electronic nose and a thermodynamic sensor system during the leavening. The results showed that a combination of 50% grape pomace and 50% mealworm larvae was advantageous from the viewpoint of the favorable representation of minerals. The analyzed mixture contained a high proportion of calcium (3976.7 ± 362.9 mg·kg−1), iron (209.3 ± 25.7 mg·kg−1), and copper (65.0 ± 100.1 mg·kg−1) for grape pomace as well as a high proportion of zinc (277.0 ± 21.9 mg·kg−1) for the mealworm larvae. However, this mixture showed a small change in the heat flux response when analyzed with thermodynamic sensors (lower yeast activity and worse gas formation properties resulted from the sensor characteristic with a lower response). The 100% wheat flour had the highest response, and the second highest response was recorded for a mixture of wheat flour with 10% grape pomace and 10% mealworm larvae. This combination also often had one of the highest responses when measured with an experimental electronic nose, so this combination was considered as one of the most advantageous options for processing from the mixtures mentioned in the article.

ACS Style

Martin Adamek; Anna Adamkova; Jiri Mlcek; Klara Vojackova; Oldrich Famera; Martin Buran; Veronika Hlobilova; Martina Buckova; Mojmir Baron; Jiri Sochor. Sensor Systems for Detecting Dough Properties Fortified with Grape Pomace and Mealworm Powders. Sensors 2020, 20, 3569 .

AMA Style

Martin Adamek, Anna Adamkova, Jiri Mlcek, Klara Vojackova, Oldrich Famera, Martin Buran, Veronika Hlobilova, Martina Buckova, Mojmir Baron, Jiri Sochor. Sensor Systems for Detecting Dough Properties Fortified with Grape Pomace and Mealworm Powders. Sensors. 2020; 20 (12):3569.

Chicago/Turabian Style

Martin Adamek; Anna Adamkova; Jiri Mlcek; Klara Vojackova; Oldrich Famera; Martin Buran; Veronika Hlobilova; Martina Buckova; Mojmir Baron; Jiri Sochor. 2020. "Sensor Systems for Detecting Dough Properties Fortified with Grape Pomace and Mealworm Powders." Sensors 20, no. 12: 3569.

Journal article
Published: 18 June 2020 in Agronomy
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This study aimed to analyze the genetic diversity of selected cultivars and clones of Lonicera sp. (edible honeysuckle) from two countries with different climatic and soil conditions. Accordingly, the determination of total polyphenols content (TPC) and total antioxidant activity (TAA) in fruits of Lonicera sp. in 2018–2019 was performed. Applied statistical methods evaluating TPC and TAA were: correlation and regression, ANOVA, and agglomerative hierarchical clustering. The neighbor-joining method and gel images analysis (PyElph software, Pavel and Vasile, Bucharest, Romania) were used for genetic analysis. The average TPC of all cultivars and clones was 5.32 mg L−1 in the year 2018 and 3.78 mg L−1 in 2019. The average TAA values of all samples in 2018 were 8.24 mg L−1, and 9.27 mg L−1 in 2019. Statistically significant correlations between years and cultivars and clones were found. Based on the lengths and number of fragments by random amplified polymorphic DNA (RAPD)-PCR’s, it was found that ‘clone 5’ and ‘clone 7’ were genetically close to the grown cultivars from the Czech Republic. Therefore, edible honeysuckle fruits are a valuable source of important nutrients for the human body and its health.

ACS Style

Marcela Cehula; Jiří Mlček; Tünde Juríková; Jana Žiarovská; Oleg Paulen; Libor Dokoupil; Anna Adámková; Ramona Babosova. Assessment of Genetic Diversity of Edible Honeysuckle Monitored through RAPD in Relative to Bioactive Substances. Agronomy 2020, 10, 868 .

AMA Style

Marcela Cehula, Jiří Mlček, Tünde Juríková, Jana Žiarovská, Oleg Paulen, Libor Dokoupil, Anna Adámková, Ramona Babosova. Assessment of Genetic Diversity of Edible Honeysuckle Monitored through RAPD in Relative to Bioactive Substances. Agronomy. 2020; 10 (6):868.

Chicago/Turabian Style

Marcela Cehula; Jiří Mlček; Tünde Juríková; Jana Žiarovská; Oleg Paulen; Libor Dokoupil; Anna Adámková; Ramona Babosova. 2020. "Assessment of Genetic Diversity of Edible Honeysuckle Monitored through RAPD in Relative to Bioactive Substances." Agronomy 10, no. 6: 868.

Journal article
Published: 29 February 2020 in Czech Journal of Food Sciences
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Sensory acceptability of the consumption of whole baked house crickets by assessors in the Czech Republic was investigated. The main aim was to observe attitudes to eating edible insects before and after their tasting and to assess the extent of the effect of prejudices. Hedonic evaluation of the overall acceptability of edible insects was carried out under laboratory conditions by trained assessors. Of the 98 panellists, 68 were willing to evaluate the sample visually and then by tasting. They showed statistically significant differences (P < 0.0001) in overall pleasantness before tasting (40 ± 22%) and after tasting (61 ± 17%). No statistically significant differences between male and female assessors were observed, either before or after tasting. Women and younger assessors were slightly more open to entomophagy, but there were no statistically significant differences between males and females or between the two age categories (18–25 and 26–45 years of age) in the results. The preferred methods of culinary preparation of edible insects that the respondents would choose were baking, roasting and frying.

ACS Style

Lenka Kouřimská; Veronika Kotrbová; Martin Kulma; Anna Adámková; Jiri Mlcek; Monika Sabolová; Dana Homolková. Attitude of assessors in the Czech Republic to the consumption of house cricket Acheta domestica L. – A preliminary study. Czech Journal of Food Sciences 2020, 38, 72 -76.

AMA Style

Lenka Kouřimská, Veronika Kotrbová, Martin Kulma, Anna Adámková, Jiri Mlcek, Monika Sabolová, Dana Homolková. Attitude of assessors in the Czech Republic to the consumption of house cricket Acheta domestica L. – A preliminary study. Czech Journal of Food Sciences. 2020; 38 (No. 1):72-76.

Chicago/Turabian Style

Lenka Kouřimská; Veronika Kotrbová; Martin Kulma; Anna Adámková; Jiri Mlcek; Monika Sabolová; Dana Homolková. 2020. "Attitude of assessors in the Czech Republic to the consumption of house cricket Acheta domestica L. – A preliminary study." Czech Journal of Food Sciences 38, no. No. 1: 72-76.

Journal article
Published: 21 February 2020 in Animals
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Heavy metal pollution of environmental ecosystems has become rather a significant factor in assessing them, as heavy metals can significantly influence animal health. The objective of this study was to examine a possible association between contents of selected heavy metals such as cadmium, copper, lead, chrome, zinc, and manganese in intestines of foxes and between prevalence of fox intestinal parasites. The association was not fully proven. On the contrary, sensitivity of parasites to cadmium was demonstrated; with increasing cadmium content in the intestine of the host, prevalence of parasites decreased to zero. No parasites were found in the intestine, when concentration of accumulated cadmium exceeded the level of 0.05 milligrams per kilogram, which represents the limit for meat (excluding offal) of bovine animals, sheep, pig, and poultry according to the Regulation (EU) No. 488/2014 amending the Regulation (EC) No. 1881/2006). Thus, even cadmium content below the above limit showed an impact on parasite biodiversity. The aim of this study was (i) to compare levels of accumulated heavy metals in the fox intestines with and without parasites. Moreover, our research also dealt with (ii) examination of the relationship between heavy metal content in fox intestines and between the presence of fox intestinal parasites. The intestines of 34 hunter-killed foxes were dissected to detect the occurrence of parasites. In 15 intestinal samples, parasitic intestinal helminths were found. Heavy metal content in small intestine tissue and in parasites was determined using atomic absorption spectrometry (AAS). The prevalence of parasites was significantly dependent on Cd content in the host’s small intestine (p < 0.01). To conclude, the authors suggest that parasites are sensitive to Cd levels; their prevalence in the intestines of the fox host decreases to zero with increasing Cd content.

ACS Style

Marie Borkovcova; Vladimir Fiser; Martina Bednarova; Zdenek Havlicek; Anna Adámková; Jiri Mlcek; Tunde Jurikova; Stefan Balla; Martin Adámek. Effect of Accumulation of Heavy Metals in the Red Fox Intestine on the Prevalence of Its Intestinal Parasites. Animals 2020, 10, 343 .

AMA Style

Marie Borkovcova, Vladimir Fiser, Martina Bednarova, Zdenek Havlicek, Anna Adámková, Jiri Mlcek, Tunde Jurikova, Stefan Balla, Martin Adámek. Effect of Accumulation of Heavy Metals in the Red Fox Intestine on the Prevalence of Its Intestinal Parasites. Animals. 2020; 10 (2):343.

Chicago/Turabian Style

Marie Borkovcova; Vladimir Fiser; Martina Bednarova; Zdenek Havlicek; Anna Adámková; Jiri Mlcek; Tunde Jurikova; Stefan Balla; Martin Adámek. 2020. "Effect of Accumulation of Heavy Metals in the Red Fox Intestine on the Prevalence of Its Intestinal Parasites." Animals 10, no. 2: 343.

Journal article
Published: 01 January 2020 in Genetika
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The article is dealing with evaluation of four fruit maturity stages of 6 selected clones (LKL-3, LKL-14, LKL-19, LKL-33, LKL-96 and LKL-103) of Lonicera kamtschatica (Sevast.) Pojark in relation to total polyphenols, flavonoids content and antioxidant activity of berries. The experiment in 5 replications of each clones has been established in the conditions of Botanical Garden in Nitra (Slovak republic)in 2016. The results of analyses proved that in respect of the total polyphenols content (TPC), the content of flavonoids (FC) and the antioxidant activity the most valuable clones at the stage of full ripened fruit were following: LKL-14 (8.77; 2.57 g/kg FW; 9.07 g/kg), LKL-33 (6.77; 2.84 g/kg FW; 9.16 g/kg) and LKL -3 (8.19; 2.61 g/kg FW; 8.94 g/kg). The results of statistical analyses by one-way analysis of variance proved significant differences among assayed clones in total flavonoids and antioxidant activity of fruit but no differences among content of total polyphenols and assayed stages of fruit maturity.

ACS Style

Tünde Juríková; Jiří Mlcek; Marcela Zitná; Irena Hlavácová; Libor Dokoupil; Jiří Sochor; Sezai Ercisli; Gursel Ozkan. Fruit maturity stage in relation to content of polyphenols, flavonoids and antioxidant activity of selected clones of Lonicera kamtschatica (Sevast.) Pojark. Genetika 2020, 52, 881 -893.

AMA Style

Tünde Juríková, Jiří Mlcek, Marcela Zitná, Irena Hlavácová, Libor Dokoupil, Jiří Sochor, Sezai Ercisli, Gursel Ozkan. Fruit maturity stage in relation to content of polyphenols, flavonoids and antioxidant activity of selected clones of Lonicera kamtschatica (Sevast.) Pojark. Genetika. 2020; 52 (3):881-893.

Chicago/Turabian Style

Tünde Juríková; Jiří Mlcek; Marcela Zitná; Irena Hlavácová; Libor Dokoupil; Jiří Sochor; Sezai Ercisli; Gursel Ozkan. 2020. "Fruit maturity stage in relation to content of polyphenols, flavonoids and antioxidant activity of selected clones of Lonicera kamtschatica (Sevast.) Pojark." Genetika 52, no. 3: 881-893.

Journal article
Published: 17 December 2019 in Acta Scientiarum Polonorum Hortorum Cultus
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It is well known, that grapevine seeds are rich in significant antioxidants. However, the issue of dealing with the analysis and comparison of antioxidant components in the seeds of Vitis vinifera L. in individual cultivars has not yet been sufficiently studied. The experiment was performed with extracts of three varieties (Blaufränkish, Italian Riesling and Cabernet Moravia) and three interspecific cultivars (Nativa, Marlen and Kofranka). Contents of nine major flavonoids (apigenin, astragalin, hyperoside, isorhamnetin, kaempferol, myricetin, quercetin, quercitrin and rutin) and two procyanidins (procyanidin A2 and procyanidin B1) were assessed by the HPLC/MS method. The highest contents of antioxidants were found out in interspecific cultivars Marlen and Nativa while the lowest one was assessed in the cultivar Cabernet Moravia. The most represented flavonoid was hyperoside (cultivar Marlen – 15.66 mg∙l–1), least represented was kaempferol (cultivar Cabernet Moravia – 1.81 μg∙l–1).

ACS Style

Lenka Sochorova; Borivoj Klejdus; Baron Mojmir; Jurikova Tunde; Jiri Mlcek; Jiri Sochor; Sezai Ercisli; Muhammed Kupe. ASSESSMENT OF ANTIOXIDANTS BY HPLC-MS IN GRAPEVINE SEEDS. Acta Scientiarum Polonorum Hortorum Cultus 2019, 18, 17 -28.

AMA Style

Lenka Sochorova, Borivoj Klejdus, Baron Mojmir, Jurikova Tunde, Jiri Mlcek, Jiri Sochor, Sezai Ercisli, Muhammed Kupe. ASSESSMENT OF ANTIOXIDANTS BY HPLC-MS IN GRAPEVINE SEEDS. Acta Scientiarum Polonorum Hortorum Cultus. 2019; 18 (6):17-28.

Chicago/Turabian Style

Lenka Sochorova; Borivoj Klejdus; Baron Mojmir; Jurikova Tunde; Jiri Mlcek; Jiri Sochor; Sezai Ercisli; Muhammed Kupe. 2019. "ASSESSMENT OF ANTIOXIDANTS BY HPLC-MS IN GRAPEVINE SEEDS." Acta Scientiarum Polonorum Hortorum Cultus 18, no. 6: 17-28.

Journal article
Published: 07 November 2019 in Food Chemistry
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Bioactive compounds demonstrating antioxidant activity were analyzed in berries and leaves of nine cultivars of sea buckthorn (Hippophaë rhamnoides L.) of various ripening times. Total polyphenols were ranging between 0.70–3.62 g GAE.kg−1 (berries) and 1.88–3.72 g GAE.kg−1 (leaves). Leaves were significantly richer source of total flavonoids (14.40–49.44 mg RE.kg−1) in comparison with berries (0.55–4.11 mg RE.kg−1). Phenolic compounds, carotenoids and vitamins were determined using high-performance liquid chromatography with a diode array detection. The content of vitamin C was 0.98–3.65 g.kg−1 in berries and 22.81–46.32 g.kg−1 in leaves, vitamin E content was 6.98–29.91 g.kg−1 in berries and 71.54–153.99 g.kg−1 in leaves. Distribution of individual phenolic compounds varied, their total content in berries was considerably lower (76.1–205.2 mg.kg−1) than in leaves (1477.7–8709.0 mg.kg−1). Regarding antioxidant activity, Raisa and Slovan (berries) and Bojan and Maslicnaja (leaves) were evaluated as the best cultivars.

ACS Style

Irena Sytařová; Jana Orsavová; Lukáš Snopek; Jiri Mlcek; Łukasz Byczyński; Ladislava Misurcova. Impact of phenolic compounds and vitamins C and E on antioxidant activity of sea buckthorn (Hippophaë rhamnoides L.) berries and leaves of diverse ripening times. Food Chemistry 2019, 310, 125784 .

AMA Style

Irena Sytařová, Jana Orsavová, Lukáš Snopek, Jiri Mlcek, Łukasz Byczyński, Ladislava Misurcova. Impact of phenolic compounds and vitamins C and E on antioxidant activity of sea buckthorn (Hippophaë rhamnoides L.) berries and leaves of diverse ripening times. Food Chemistry. 2019; 310 ():125784.

Chicago/Turabian Style

Irena Sytařová; Jana Orsavová; Lukáš Snopek; Jiri Mlcek; Łukasz Byczyński; Ladislava Misurcova. 2019. "Impact of phenolic compounds and vitamins C and E on antioxidant activity of sea buckthorn (Hippophaë rhamnoides L.) berries and leaves of diverse ripening times." Food Chemistry 310, no. : 125784.