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Results 31 to 60 of 583:

Exploring the potential use of two species of Dioscorea in composite flours for bakery productsOriginal Paper

Martin Amador Meza-Nieto, María Guadalupe Torres-Cardona, Sergio Soto-Simental, Antonio de Jesús Cenobio-Galindo, Rubén Jiménez-Alvarado

Czech J. Food Sci., 2026, 44(1):52-61 | DOI: 10.17221/48/2025-CJFS

Dioscorea species possess valuable properties that make them suitable for use in food production. This study characterised doughs made with flours from two species of Dioscorea by evaluating their nutritional, rheological and textural properties for use in baking. Dioscorea composita flour had a higher crude fibre content (1.5% ± 0.11), while Dioscorea bulbifera flour exhibited higher antioxidant content [930.5mg GAE · (100g)–1 dry matter] and better protein digestibility (89.06% ± 0.7%). Wheat flour was substituted with Dioscorea flour (0–30%) to make composite doughs. Doughs containing D. composita exhibited superior biaxial extensibility (41.22 ± 11.9mm at 20% substitution), compared to the control (21.4 ± 2.7mm), indicating their potential for use in bread production. Meanwhile, doughs containing 20% or more D. bulbifera flour were more suitable for products such as biscuits or pitta bread. However, all composite doughs were harder to handle, likely due to gluten dilution and component interactions, regardless of the Dioscorea species used. Therefore, the Dioscorea species used in this study could be considered promising candidates for inclusion in suitable bakery products.

Comprehensive nutritional profiling and antioxidant capacity assessment of indigenous mushrooms Pleurotus ostreatus and Agaricus bisporusOriginal Paper

Touseef Iqbal, Muhammad Sohaib, Sanaullah Iqbal, Habib Rehman

Czech J. Food Sci., 2024, 42(3):174-183 | DOI: 10.17221/158/2023-CJFS


The global demand for high-quality, nutritious food is increasing, and mushrooms have gained popularity as a healthy dietary option; mushroom consumption is increasing in Pakistan owing to their rich nutritional profile, phytochemicals presence and antioxidant capacity. This study was carried out to determine comprehensive nutritional analysis, antioxidant parameters, amino acids, and fatty acid composition of commonly grown mushroom varieties oysters (Pleurotus ostreatus) and white buttons (Agaricus bisporus) in Pakistan. The study results indicated mushrooms are perishable, high in protein and fibre content, along with a low caloric value. Also, they are rich in essential minerals like potassium, phosphorus, iron, and water-soluble vitamins. In addition, both mushrooms demonstrated significant antioxidant activity, with oyster mushrooms having a higher potential. Additionally, profiling of fatty acids and amino acids showed mushrooms having low caloric value and powerful nutrition composition that makes them suitable for developing healthy dietary choices for better human health.

Quality assessment of elderberry (Sambucus nigra L.) jamsOriginal Paper

Oana-Viorela Nistor, Doina-Georgeta Andronoiu, Liliana Ceclu

Czech J. Food Sci., 2025, 43(1):48-58 | DOI: 10.17221/111/2024-CJFS


Elderberries belong to the spontaneous flora of Sambucus nigra L., being considered wild fruits and even improper to be consumed. Dark violet-black and slightly glossy elderberry fruits are rich in bioactive compounds such as agglutinin, total anthocyanins and polyphenols. The importance of heating is claimed by the seasonal and toxic specific elderberry fruits. Moreover, the need to transform the fruits from not suitable for consumption into functional products and to prolong the shelf life of the product should be highlighted. Based on these affirmations, the aim of the study was to preserve the elderberries as jam with or without refined sugar. Phytochemical, textural, colour and sensory analyses were used to characterize three samples of jams (one without sugar, one with refined sugar and one with stevia sugar). The samples with stevia sweetener addition showed the highest values of anthocyanins (1.43 ± 0.16 mg·g–1 dry matter, DM) among the processed samples; as for the raw fruits, the anthocyanin content showed a decrease. The antioxidant activity determined by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay revealed similar values between all the analysed elderberry jams. In accordance with the other results, the most appreciated sample by the sensory evaluation was the sample with stevia sweetener. As a conclusion, the total sugar substitution could contribute to a more valuable matrix than the original one. The novelty of the study consists in the use of such popular spontaneous flora of Sambucus nigra L. berries and in a change of the inedible character of the raw fruits into edible functional foods with a prolonged shelf-life.

Effects of dried fig flour incorporation as a natural additive on nutritional composition and sensory assessment of biscuitOriginal Paper

Berrighi Nabila

Czech J. Food Sci., 2025, 43(1):37-47 | DOI: 10.17221/187/2024-CJFS

The aim of this work is to characterize the physicochemical and techno-functional properties of dried fig flour to investigate its effect on the qualities of biscuits on the one hand and to encourage the use of this aromatic and medicinal plant in the agri-food industry. During this study, figs and wheat grains were dried and subsequently ground to obtain a flour that was used in various proportions of 0%, 50% and 100%, respectively in the manufacture of the biscuit. The flours were examined for proximate composition, polyphenol and tannin levels, along with functional properties. Flour derived from dried figs showed higher levels of crude ash, sugar, fiber, polyphenol and tannin, as well as greater water absorption capacity and density. The results indicated that incorporating dried and rehydrated fruits increased the total antioxidant activity of the biscuits compared to the control sample. The detailed organoleptic analysis, conducted through a tasting test revealed that all tasters found the dry biscuits acceptable. Biscuits formulated with 50% fig powder exhibited improved sensory attributes, including attractive colour, a crispy texture, and a more pronounced flavour. The use of this aromatic and medicinal plant in the food industry, particularly in biscuit production, holds significant potential. It enhances the nutritional value while imparting a sweet taste, distinctive flavour and natural colour. Additionally, its use contributes to improving the functional attributes of biscuit products, offering a sustainable approach to valorizing dried fig flour.

Application of FT-NIR spectroscopy as a rapid tool for analysis of the fish fillet chemical compositionOriginal Paper

Lucia Bene¹ová, Silvia Jakabová, Ladislav Ondru¹, Jozef Golian

Czech J. Food Sci., 2022, 40(5):359-366 | DOI: 10.17221/30/2022-CJFS

The basic chemical composition of the meat of fifteen freshwater and saltwater fish species was studied. Fourier transform-near-infrared (FT-NIR) spectroscopy was applied for determination of the content of fat, protein and dry matter in the fish meat samples. The fish species analysed differed significantly in dry matter, fat, and protein content (P < 0.05). The highest fat percentage was determined in the samples of Cyprinus carpio (17.14 ± 0.53%) and the lowest value was found in the samples of Lophius piscatorius (0.06 ± 0.003%). Thunnus albacares samples had the highest content of proteins (24.26 ± 1.89%), whereas the lowest protein content was observed in Oreochromis niloticus (14.73 ± 0.87%). The results of the measured dry matter varied from the highest content in C. carpio samples (35.73 ± 0.47%) to the lowest content of L. piscatorius samples (15.64 ± 0.43%). Principal component analysis (PCA) extracted three major groups, which differentiate the analysed samples based on their protein, lipid and dry matter content. Partial least squares discriminant analysis (PLSDA) confirmed the use of three variables (protein, fat, dry matter) measured by FT-NIR to separate the observed fish species.

Corrigendum:  Meat quality – Genetic background and methods of its analysisCorrigendum

Marek Kowalczyk

Czech J. Food Sci., 2023, 41(1):78 | DOI: 10.17221/26/2023-CJFS

Molecular hydrogen content of different dietary supplementsShort Communication

Sergej Ostojic, Milan Vranes

Czech J. Food Sci., 2024, 42(2):136-140 | DOI: 10.17221/16/2024-CJFS


The main goal of this study was to evaluate the concentration and release dynamics of molecular hydrogen (H2, dihydrogen) in dietary evaluate supplements and identify products that provide a biologically significant amount of dihydrogen suitable for human consumption. We examined ten commercial supplements marketed for their dihydrogen content, including slow-release capsules and tablets (4 products), effervescent powders and tablets (5 products), and canned ready-to-drink beverage (1 product). These products were acquired either through online purchases, from retail stores, or obtained free of charge directly from the manufacturers upon request. Dihydrogen concentration was measured using a highly sensitive Clark-type hydrogen microsensor with a detection limit 0.05 µmol·L–1. Out of the ten products examined, only three (30.0%) exhibited dihydrogen levels surpassing the levels marketed as biologically relevant (500 µmol·L–1), and one of these products (a canned ready-to-drink beverage) approached this level with a concentration of 439.2 µmol·L–1. Interestingly, all slow-release capsules yielded negligible amounts of hydrogen (< 2 µmol·L–1), while a slow-release tablet delivered 43.6 µmol·L–1 of dihydrogen per single dose. The substantial variance in dihydrogen content among the assessed supplements holds significant implications for the general public, as high-potency products have the potential to provide up to 7 000 times more dihydrogen per single dosage compared to their low-potency counterparts.

Bioactive compounds and antioxidant activities of selected types of chilli peppersOriginal Paper

Terezia Hudáková, Monika ©uleková, Jan Tauchen, Martina ©emeláková, Matú¹ Várady, Peter Popelka

Czech J. Food Sci., 2023, 41(3):204-211 | DOI: 10.17221/45/2023-CJFS


Chilli peppers (Capsicum spp.) are important plants usually consumed as food or used as a spice or medicine. They contain a wide range of phytochemicals such as capsaicinoids, polyphenols (PPH), carotenoids (CC) and vitamins. This study aimed to quantify the contents of capsaicin, dihydrocapsaicin, total PPH, phenolic acids (PHA) and total CC, and the antioxidant activities of the chilli peppers Trinidad Moruga Scorpion, Bhut Jolokia, Habanero Red, Habanero Maya Red, Habanero Red Savina, Jamaica Rosso, Serrano, and Jalapeño. High-performance liquid chromatography was used to quantify the contents of the bioactive compounds. The capsaicin contents in the peppers ranged from 2.1 to 124.2 mg·g–1, the dihydrocapsaicin content ranged from 5.1 to 151.3 mg·g–1, the total PPH content ranged from 3.53 to 25.9 mg GAE·g–1, and the total CC content ranged from 114.7 to 1 390.8 μg·g–1. The chlorogenic acid content was highest in Habanero Red (82.6 µg·g–1). The 1,1-diphenyl-2-picrylhydrazyl test of free-radical scavenging activity indicated that the ethanolic extract of the Trinidad Moruga Scorpion pepper had the highest antioxidant activity correlated with the contents of phenolic substances.

Investigation of multimycotoxins by LC-MS/MS in maise semolina chipsOriginal Paper

Oktay Samadzade, Karlo Muratoğlu, Serkan Kemal Büyükünal

Czech J. Food Sci., 2023, 41(3):212-220 | DOI: 10.17221/241/2022-CJFS


Chips made from maize semolina are rarely mycotoxin analysed because they are classified as low-risk foods in routine legal control plans. It is essential to foresee the health risks these snack foods may pose in the medium and long term, whose consumption frequency and quantity have increased with the changing consumer behaviours during the pandemic. The most outstanding development in mycotoxin analysis in recent years has been the use of high-pressure liquid chromatography together with mass spectrometry (LC-MS/MS) as a detector. For aflatoxin (AF) B1, B2, G1, G2, ochratoxin A (OTA), zearalenone (ZEN), deoxynivalenol (DON), fumonisin B1 (FB1), fumonisin B2 (FB2), citrinin (CIT), HT-2 toxin, and T-2 toxin determination in our samples, the LC-MS/MS analysis method with electrospray ionisation interfaces was utilised. Aflatoxin B1 levels in 22.7% of the samples (2.01–17.49 μg·kg–1) and total aflatoxins (TAF) in 26.7% of the samples (6.71–24.67 μg·kg–1) were determined to exceed the limits defined in the Turkish Food Codex Contaminants Regulation. CIT could not be detected in any of the samples. ZEN + DON + OTA was found in 21.3% of the samples, DON + TAF + total fumonisins (FUM) in 19.3%, and TAF + ZEN + FUM in 18.7%.

Meat quality - Genetic background and methods of its analysisReview

Marek Kowalczyk, Agnieszka Kaliniak-Dziura, Micha³ Prasow, Piotr Domaradzki, Anna Litwiñczuk

Czech J. Food Sci., 2022, 40(1):15-25 | DOI: 10.17221/255/2020-CJFS

Corrigendum in: CJFS. 2023 Feb 27; 41(1):78. doi:10.17221/26/2023-CJFS

Growing consumer awareness is forcing food producers to supply raw material and products of increasingly high quality and health-promoting properties. Knowledge of the genetic background of quality characteristics is taking on great importance, enabling selection based on molecular markers. The increasing throughput of molecular techniques, in combination with an expanding bioinformatics infrastructure, is leading to continual improvement in understanding of the molecular mechanisms influencing meat quality. This has resulted in the identification of polymorphic nucleotides [single nucleotide polymorphisms (SNPs)] showing a relationship with meat characteristics such as tenderness [polymorphism in the calpain (CAPN) and calpastatin (CAST) genes], marbling [diacylglycerol o-acyltransferase 1 (DGAT1)], colour, pH and water-holding capacity (WHC) [CAST, stearoyl-CoA desaturase (SCD) and others], and fatty acid profile (SCD1). An increasingly wide range of methods is used for analysis, from techniques based on amplification of nucleic acids [polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) and amplification refractory mutation system-PCR (ARMS-PCR)] through Sanger sequencing to high-throughput next-generation sequencing (NGS) techniques. This paper is a review of the literature on polymorphism of genes determining the quality characteristics of meat and molecular methods used to detect them.

Microalgae in lab-grown meat productionReview

Arturo Nickolay Rojas-Tavara, Alberto Jesus Donayre-Torres

Czech J. Food Sci., 2023, 41(6):406-418 | DOI: 10.17221/69/2023-CJFS


Reports have shown that meat production operations today contribute to the climate crisis, facilitating the occurrence of infectious diseases, and contributing to environmental pollution. Consequently, the public demands alternatives to traditional meat, such as in vitro manufactured meat. Several authors have suggested that improvements should be made in the manufacturing of cell-cultured meat to make a more sustainable and scalable process. They recently proposed using microalgae as a sustainable system to produce important nutrients such as oxygen from cellular waste molecules of animal cultures such as ammonia and carbon dioxide. In this review, we discuss recent advances of different microalgae applications in the production of lab-grown meat, with special emphasis on their use as a replacement for fetal bovine serum (FBS) or culture media, as well as its applicability as a source of cell oxygenation and waste upcycling to extend the life of animal cell cultures. Also, we discuss the implementation and limitations of these algae systems in large-scale in vitro meat manufacturing.

Phytochemical, antioxidant activity, and thermal stability of Clitoria ternatea flower extractsOriginal Paper

Sy-Yu Shiau, Yuhan Wang, Yanli Yu, Songling Cai, Qian Liu

Czech J. Food Sci., 2024, 42(4):284-294 | DOI: 10.17221/68/2024-CJFS


The demand for beneficial, safe natural pigments is growing. Clitoria ternatea (CT) flowers are a promising source of natural blue colours and bioactive compounds. This study extracted intact CT flowers (CTFs) and their powders (CTFPs) with distilled water at various temperatures (30–90 °C) and durations (30–180 min). The total anthocyanin content (TAC) and total phenolic content (TPC) of the CT extracts were analysed by using the pH differential and Folin-Ciocalteu methods, respectively. The antioxidant activity was expressed as the ability to scavenge DPPH (2,2-diphenyl-1-picrylhydrazyl) radicals. The results showed that different sample types significantly (P < 0.05) influenced the TAC, TPC, and antioxidant activity. The optimal TAC and TPC extraction for CTF was at 90 °C for 90 min, and for CTFP at 90 °C for 30 min. Using hot water instead of 60% alcohol organic solvent was feasible for extracting the phytochemicals, particularly with CTF. Ultrasound-assisted extraction was notably effective for anthocyanins from intact flowers. Higher heating temperatures and pH values increased the anthocyanin degradation rate constants, while a higher pH decreased the activation energy. Thus, blue aqueous CT flower extracts, rich in phytochemicals and antioxidants, have the potential for use in foods and nutraceuticals with neutral and acidic pH values.

Influence of the ageing time on the quality of three kinds of cold-climate mountain grape brandyOriginal Paper

Fang Gu, MengYing Gao, XueFeng Wang, MeiQi Lv, JinLong Zuo, Chong Tan, Zhi Xia, JunSheng Li

Czech J. Food Sci., 2026, 44(1):71-81 | DOI: 10.17221/20/2025-CJFS

Northeast China boasts abundant resources of cold mountain grapes. This study focused on three varieties of cold mountain grape brandy, Beibing Hong (BBH), Shuanghong (SH), and Zuoshanyi (ZSY), with varying ageing periods to investigate changes in their physicochemical properties, nutrients, and aroma compounds. Results showed that alcohol content and pH gradually decreased with ageing, while total acidity (including inorganic acids) increased. Specific organic acids declined over time, whereas polyphenolic compounds increased with longer ageing. Furthermore, the total quantity of aroma substances in all three brandies was positively correlated with ageing duration, with 18-month-aged BBH brandy exhibiting the highest content and the richest aromatic variety. Clustering analysis via heat maps revealed that brandies aged 12 and 18 months grouped together, showing that ageing time correlated positively with most esters and alcohols and negatively with acids. No significant variations were observed in the contents of terpenes, aldehydes and ketones among the three brandy varieties.

Study on the geographical origin and characteristic differential components of Qianbei Ma lamb based on rapid evaporative ionization mass spectrometryOriginal Paper

Ji Zhang, Rui Hou, Yuhang Luo, Xiaohong Zhang, Hong Luo, Lei Ling, Liping Xiang

Czech J. Food Sci., 2025, 43(1):59-70 | DOI: 10.17221/159/2024-CJFS

A rapid evaporative ionization mass spectrometry (REIMS) method combined with intelligent knife (iKnife) method was developed to explore the geographical origin and characteristic differential components of Qianbei Ma lamb. The REIMS conditions were initially refined, with the cauterization duration of 3 seconds, and the auxiliary solvent flow rate set to 100 μL·min–1 to prevent duplication. A database model was created from raw data through the proposed principal component analysis-linear discriminate analysis (PCA-LDA) in Live ID software, successfully applied to identify samples from 5 provinces in China and the real-time reliable identification rate with confidence higher than 99%. The obtained data by REIMS were used to establish the multivariate statistical models which using orthogonal projection to latent structures discriminant analysis (OPLS-DA), provided strong the discrimination power between composition and content changes of 16 specific ions such as m/z 726.3952 and m/z 744.4050, etc., including fatty alcohols, fatty acids and phosphatidylserines in mutton of different origin and the model displayed validation [R2(Y) = 0.968, Q2 = 0.924].

Evaluation of differences in the quality of pork meat from Czech pig breeds based on nutritional value, energy value and amino acid scoreOriginal Paper

Pavel Nevrkla, Eva Weisbauerová, Svitlana Karvan, Jan Seèkáø, Zdenìk Hada¹, Miroslav Rozkot, Drahomíra Ètvrtlíková Knitlová

Czech J. Food Sci., 2025, 43(6):411-418 | DOI: 10.17221/61/2025-CJFS

The nutritional quality of meat from pigs of the indigenous Prestice Black-Pied pig (PB) and the three-breed commercial hybrid of Large White × Landrace × Large Whitesireline (CH) was compared using these indicators: content of intramuscular fat, protein, saturated fatty acids (SFA) and essential amino acids (EAAs). The protein content and energy value of PB and CH meat were 20.12% and 22.56%, and 426.77 kJ·(100 g)–1 and 443.01 kJ·(100 g)–1, respectively. The lowest fat content (1.33%) and SFA content (0.33%) were found in the meat of commercial hybrid pigs. Leucine and lysine were the most predominant EAAs detected. Valine and leucine are the limiting AAs in studied meat as a protein source for children at 0.5–2 years of age. The compositions of AAs in PB and CH pork fully meet the protein needs of children over 2 years of age and adults. The calculated amount of pork meat provides the required daily intake of AAs and ensures 5–8% energy for children and 8–11% energy for adults at moderate physical activity. In general, the meat of Prestice Black-Pied pig and of the commercial hybrid showed the high nutritional value and quality and it can be recommended for consumption in the diet by children and adults.

Impact of proofing and baking parameters on B complex vitamins retention of Arabic flatbread produced from wheat flour with different extraction ratesOriginal Paper

Ashraf M. Al-Khamaiseh, Mohammad H. Shahein, Yanal Albawarshi, Ayed Amr

[Ahead of Print]Czech J. Food Sci., X:X | DOI: 10.17221/145/2024-CJFS

Extensive research studies worldwide have discussed and analysed the effect of processing conditions on the nutritional aspects of Western types of bread; however, the literature on Arabic bread processing is very limited. This study aims to determine the effect of baking temperature and time on the retention of B vitamins in a pocket-forming Arabic flatbread model system. High-crumb flat Arabic bread (Thick Kmaj) was prepared by the straight dough method from three types of flour (patent, straight grade, and whole wheat) fortified with B vitamins. Doughs were fermented and proofed for 0, 30, 60, and 90 min and baked at five temperatures (250, 300, 350, 400, and 450 °C) for three different baking times (1, 2, and 3 min). Baking at lower temperatures (i.e. < 300 °C) resulted in higher B-complex vitamin retention values (more than 90%). Vitamin B6 showed exceptional retention values (about 100%), though these decreased by increasing the baking temperature. Vitamin retention levels in the produced Arabic bread samples are similar to those found in pan and other high-crumb bread types when baked at lower temperatures. Results are expected to positively impact the output and economics of the flour fortification process, as it can be helpful material for upcoming micronutrient survey studies to assess fortification process outcomes.

Effect of different heat treatments on physicochemical properties and antioxidant characteristics of black beansOriginal Paper

Xiaolong Ji, Shuli Zhang, Xin Du, Yuning Zhang, Yang Yao, Yingying Zhu

Czech J. Food Sci., 2025, 43(4):300-310 | DOI: 10.17221/144/2024-CJFS


This study systematically evaluated the effects of four thermal processing methods-boiling, steaming, extrusion, and roasting-on the physicochemical properties and in vitro antioxidant activity of black beans. Notably, ash content decreased following boiling and steaming, reaching 45.5 mg·g–1 and 43.5 mg·g–1, respectively, corresponding to reductions of 8.5% and 13.3%. In contrast, extrusion and roasting led to moisture loss, resulting in ash content increases of 3.2% and 6.8%. Among the treatments, boiling significantly increased powder clumping (5.1%), primarily due to elevated moisture content, a value markedly higher than that observed for other methods. Both boiling and steaming diminished brightness, while extrusion deepened colour intensity and enhanced redness. Regarding chemical composition, polyphenol content declined after boiling and steaming (3.8 mg·g–1 and 2.9 mg·g–1, respectively) relative to untreated black bean powder (4.3 mg·g–1). Extrusion, however, elevated polyphenol levels, whereas all heat treatments reduced flavonoid content, with boiling exerting the greatest impact. Antioxidant activity also declined post-processing, with boiling having the most pronounced effect on 1,1-diphenyl-2-trinitrophenylhydrazine (DPPH) radical scavenging and steaming most affecting hydroxyl radical elimination. Extrusion emerged as the optimal processing method for black beans, and superior retention of bioactive compounds, enhanced antioxidant capacity, improved physicochemical properties (lower clumping, stable colour parameters). These findings could provide actionable insights for food industries to select processing methods that maximise nutritional value and functional properties of black bean products.

The effect of chitosan enriched with different essential oils on the physicochemical and microbiological quality of trout burgers stored at 4 °COriginal Paper

Wadah Elsheikh, Ilknur Ucak

Czech J. Food Sci., 2026, 44(1):62-70 | DOI: 10.17221/116/2025-CJFS

This study examined the effects of chitosan films enriched with various essential oils on the quality characteristics of rainbow trout burgers stored at (4 ± 1 °C) for 21 days. Five groups were prepared: a control group (C), a chitosan film group (CF), and groups of chitosan films enriched with 1% oregano essential oil (OEO), citrus essential oil (CEO), and rosemary essential oil (REO). Microbiological counts and physicochemical factors were assessed. Significant differences (< 0.05) in physicochemical properties were observed among the treatments, with OEO showing the lowest pH (6.67), the lowest peroxide value (PV; 12 meq O2·kg–1), and the lowest thiobarbituric acid reactive substances (TBARS) level [1.159 malondialdehyde (MDA)·kg–1]. Microbial results indicated that the shelf life of the treated groups was extended by up to 9 days compared to the control. The lowest counts of Enterobacteriaceae, yeast and mould, and lactic acid bacteria in OEO were 5.17, 4.87, and 5.10 log CFU·g–1, respectively, while the lowest counts of psychrophilic and mesophilic bacteria were observed in the REO group, at 6.34 and 6.29 log CFU·g–1, respectively. In conclusion, combining essential oils, particularly oregano and rosemary, with chitosan effectively enhances seafood freshness and extends its shelf life.

Technological and nutritional aspects of fresh purslane (Portulaca oleracea L.) in ice cream productionOriginal Paper

Engin Gündoğdu, Fatma Hezer

Czech J. Food Sci., 2025, 43(2):129-139 | DOI: 10.17221/93/2024-CJFS


Purslane (Portulaca oleracea L.) is rich in ω-3 fatty acids, antioxidants, and minerals, and has notable neuroprotective, anti-inflammatory, antimicrobial, antidiabetic, antioxidant, anticancer, and antihypertensive properties. This research evaluated the effect of fresh purslane (FP) on the physicochemical and nutritional properties of ice cream, including α-linolenic acid (ALA; 18 : 3; ω-3), mineral content, and antioxidant properties, along with sensory characteristics. FP was added at 0, 5, 10, and 15% (w/w) levels. The addition of FP significantly increased the iron (Fe), calcium (Ca), copper (Cu), sodium (Na), oleic acid (OA), and ALA contents (P < 0.05). FP also increased the first dripping and complete melting times, while decreasing overrun and viscosity. Total antioxidant capacity (TAC) remained unchanged (> 0.05), but total phenolic content (TPC) and 2,2-diphenyl-1-picryl-hydrazyl (DPPH) radical scavenging activity significantly increased (P < 0.01). Thirty-one volatile compounds were identified, with increases in octadecane, dodecane, and 2-hexenal concentrations due to FP addition. Although the addition of FP improved the ALA content and antioxidant properties, sensory results showed that FP over 5% (w/w) lowered taste and general acceptability scores. Thus, using 5% of FP in ice cream is optimal for enhancing nutritional properties.

Consumer sensory evaluation of flavour enhancers derived from snail protein hydrolysate using the Rate-All-That-Applies methodOriginal Paper

Dedin Finatsiyatull Rosida, Dina Mustika Rini, Dwi Ernawati

Czech J. Food Sci., 2025, 43(4):263-273 | DOI: 10.17221/235/2024-CJFS

Snails, which are high in protein, have the potential to be developed as a flavour enhancer through the hydrolysis process. However, consumer acceptance of the flavour enhancer needs to be fully evaluated. The aim of this study was to determine the consumer acceptance of a snail protein hydrolysate from different snail species (golden apple, apple, and freshwater) and at different hydrolysis durations (3, 6, and 9 h), and to identify the drivers of liking of snail protein hydrolysates through descriptive profiling using Rate-All-That-Apply (RATA) method and consumer testing using Hedonic test. The RATA intensity data were subjected to analysis using analysis of variance, followed by a Tukey's post hoc test (< 0.05). Furthermore, the sensory profile data were analysed using principal component analysis and preference mapping. Snail species and hydrolysis time influenced the sensory profile of snail protein hydrolysate, with the longer hydrolysis time being the most liked. The most liked flavour enhancer derived from golden apple snail with 9 h hydrolysis time had a strong savoury aroma, salty taste, umami taste, lingering mouthfeel, and yellow colour. Additionally, it exhibited a moderate intensity of seafood aroma, a garlic taste, an umami aftertaste, a liquid mouthfeel, and a salty aftertaste. However, it had a low intensity of bitter aftertaste and burnt taste, and a very low intensity of sweet aroma, sweet taste, bitter taste, and bland taste. Thus, these findings highlight the importance of evaluating the efficacy of flavour enhancers and facilitate the identification of the optimal snail species and hydrolysis time according to consumer preference.

Effect of different forms of buckwheat addition on the physicochemical and sensory properties of breadOriginal Paper

Erdi Eren, Murat Reis Akkaya

Czech J. Food Sci., 2024, 42(3):216-223 | DOI: 10.17221/36/2024-CJFS

This study aimed to obtain buckwheat bread by adding whole buckwheat to the white bread formulation in groat and flour form. The addition was made in different proportions (0, 10, 20, and 30%) according to the principle of substitution. Buckwheat addition, as groat, increased the bread's hardness to a great extent. Moisture analysis results indicated that the buckwheat additive can increase the water-holding capacity and may extend the shelf life, especially in flour form. The samples' antioxidant activities and phenolic content significantly increased when the addition was made as flour. All buckwheat-added samples had lower volume values than control samples. Buckwheat addition caused an increase in volatile components such as phenylethanol and benzylalcohol. As a result of sensory analysis, using buckwheat as flour and groat positively affected breadmaking. Considering the samples' nutritional and sensory properties, the combination in which 20% buckwheat flour is added to the white bread formulation is the most appropriate use.

Impacts of exopolysaccharides producing probiotic bacteria on the physicochemical and sensory properties of fermented goat yoghurt under chilled storageOriginal Paper

Han Wu, Xiayidan Maimaiti, Ying Wang, Anthony Pius Bassey, Nurgvl Rahman, Xiaoli Liu

Czech J. Food Sci., 2024, 42(5):305-316 | DOI: 10.17221/125/2024-CJFS

This study focused on the co-fermentation of goat milk with functional lactic acid bacteria (LAB) and traditional yoghurt starter culture. The fermentation process was optimised by single factor experiment and response surface methodology (RSM). The physicochemical and sensory properties of goat milk yoghurt were evaluated under chilled (4 °C) storage for 21 days. The optimised conditions were selected as the inoculum amount of Lactobacillus paracasei NM-8 (1.1 × 107 CFU·mL–1; CFU – colony forming unit), sucrose addition (6.8%) and fermentation temperature (41 °C). During milk coagulation, the pH declined to be 4.45 and the viable LAB number arrived at 8.77 log CFU·mL–1. The content of exopolysaccharides (EPS) increased to be 2.13 g·L–1. These changes led to the better viscosity (941.33–792.33 cP) and higher water holding capacity (63.24–56.20%) of yoghurt fermented using L. paracasei NM-8 in storage, compared with those of yoghurt without L. paracasei NM-8. This study provided a theoretical basis for eliminating the whey precipitation and rough texture of goat milk yoghurt.

Effect of protective cultures on selected parameters of fresh cheeseOriginal Paper

Libor Kalhotka, Jana Zemanová, Petr Kouøil, Radek Valach, Joná¹ Novotný, Miroslav Jùzl, Jan Slováèek

Czech J. Food Sci., 2026, 44(1):82-92 | DOI: 10.17221/190/2025-CJFS

Protective cultures are selected microorganisms that inhibit undesirable microbiota through metabolic activity, thereby improving the safety and shelf life of dairy products. This study evaluated the effect of protective cultures on the physicochemical, microbiological, and sensory properties of fresh cheese during 21 days of storage at 6–8 °C. Three variants were prepared: a control with the starter culture CHN-19 and two experimental samples containing FreshQ® Cheese 3 and FreshQ® 9 (Lacticaseibacillus rhamnosus). The application of protective cultures resulted in a slightly faster acidification but did not significantly affect dry matter or fat content. Microbiological analysis revealed higher counts of lactic acid bacteria and generally lower counts of psychrotrophic microorganisms in samples containing protective cultures on several storage days, while Escherichia coli and moulds were not detected. Sensory evaluation indicated that cheeses with protective cultures, particularly FreshQ® 9, maintained a pleasant flavour and appearance even after 21 days of storage, whereas the control sample became sensorially unacceptable after approximately two weeks. The application of protective cultures therefore enhances the sensory stability and microbial safety of fresh cheeses without adversely affecting their technological characteristics.

Improving the extraction efficiency and functional properties of wheat germ protein by ultrasound-assistedOriginal Paper

Chunyan Xie, Juan Du, Chunmiao Xing, Xu Zhang, Lan Wang, Hongzhang Chen, Tong Lin

Czech J. Food Sci., 2023, 41(2):118-126 | DOI: 10.17221/54/2022-CJFS

his study optimised the conditions for ultrasound-assisted extraction (UAE) of defatted wheat germ protein (WGP) and evaluated its effect on the functional properties. Single-factor and orthogonal experiment designs were combined to optimise the UAE extraction condition. The extraction of WGP reached the highest level, at 88.66%, with a solid : liquid ratio of 1 : 25 g·mL–1, pH value of 9.0, ultrasonic time of 10 min, and ultrasonic power at 400 W. Under these conditions, albumin, globulin, prolamin, and glutenin accounted for 32.26, 28.52, 5.42, and 22.40% of total protein, respectively. In addition, this study compared the functional properties of WGP extracted by UAE with the results based on a commercially available soy protein (SP) isolate (SPI). The UAE of WGP had better oil absorption, foaming, and emulsifying properties. Therefore, UAE is a promising technique for food protein extraction because it can change the protein efficiencies and properties of the extract.

Effect of rosemary and clove essential oils on lipid oxidation, microbial, sensorial properties and storage stability of kavurma, a cooked meat productOriginal Paper

Sezen Harmankaya, Ahmet Harmankaya, Koray ݺbarali, Özlem İstanbullu Paksoy

Czech J. Food Sci., 2024, 42(4):251-262 | DOI: 10.17221/56/2024-CJFS


Kavurma is a traditional cooked meat product of Türkiye containing a high percentage of animal fat (30–40%). Therefore, kavurma can undergo lipid oxidation easily. This may cause a major problem in the storage and marketing of the product. Synthetic additives used in foods cause anxiety in consumers and this situation increases the search for natural alternatives. Plant essential oils can be reliable additives to extend the shelf life of foods. The protective effect of rosemary and clove essential oils on kavurma meat against microbiological and oxidative deterioration was investigated in this study. For this purpose, kavurma samples were divided into five groups after being produced by standard methods, the essential oils (rosemary and clove) obtained by distillation method were added to the kavurma fat in various proportions, alone or in combination. At the end of the study, the thiobarbituric acid-reactive substance (TBARS) and peroxide values of the groups containing plant essential oils were found to be lower than the control groups. The groups containing rosemary and clove essential oil showed that microbiological deterioration was delayed and, the sensory evaluation scores were higher than the control groups at the end of the cold storage period.

The potential of probiotics derived from functional foods for skin healthReview

Eunhye Son

Czech J. Food Sci., 2025, 43(4):235-245 | DOI: 10.17221/35/2025-CJFS

Probiotics, widely recognised for their benefits in gut health, have gained increasing attention for their comprehensive role in skin health maintenance and improvement. This review explores the multifaceted impact of food-derived probiotics on various aspects of skin health, including anti-aging, inflammation regulation, barrier function enhancement, and hydration. Probiotics exert protective effects against oxidative stress and inflammatory responses through modulation of the gut-skin axis, enhancement of the skin microbiome balance, and immunomodulatory properties. Additionally, functional foods enriched with probiotics have demonstrated efficacy in promoting skin hydration, elasticity, collagen production, and overall resilience. By synthesising recent research findings, this review highlights the potential of probiotic-enriched foods as a natural approach to supporting comprehensive skin health and addressing age-related skin changes. The implications for functional food development and dietary interventions are also discussed, providing insights into future research directions in probiotic-based holistic skin care strategies.

Enhancing vitamin C stability through liposomal encapsulation with optimised pressure and cycle conditionsOriginal Paper

Özlem Üstün-Aytekin

Czech J. Food Sci., 2025, 43(6):419-427 | DOI: 10.17221/42/2025-CJFS

Encapsulation technology offers an effective strategy to enhance the bioavailability and stability of vitamin C by addressing its sensitivity to environmental factors. This study investigates the impact of formulation parameters, particularly lecithin concentration and high-pressure processing conditions, on the physicochemical properties, gastrointestinal stability, cytotoxicity, and shelf life of liposomal vitamin C formulations. Among the tested samples, Sample 1, prepared with 20% soybean lecithin and 20% ascorbic acid and processed at 400 bar with a single cycle, demonstrated superior performance. It exhibited a high zeta potential (−23.17 mV), uniform size distribution (317.5 ± 8.863 nm) and encapsulation efficiency of 77.6%, along with 85% vitamin C retention under simulated gastrointestinal conditions. Cellular uptake in Caco-2 cells reached 30%, and structural integrity was preserved for 240 days at 40 °C, indicating strong thermal stability. The results underscore that lecithin concentration had the most significant influence on encapsulation efficiency and liposome stability, compared to pressure intensity or the number of processing cycles. Furthermore, modulating the zeta potential through lipid composition and the energy applied to phospholipid solutions was found to be critical for improving bioavailability and ensuring long-term dispersion stability. In conclusion, the optimised liposomal formulation offers a promising vehicle for advanced vitamin C delivery with enhanced protection, bioaccessibility, and storage potential.

Review on nutritional benefits of triticaleReview

Svetlana Kamanova, Yernaz Yermekov, Kamran Shah, Azigul Mulati, Xuebu Liu, Berdibek Bulashev, Dana Toimbayeva, Gulnazym Ospankulova

Czech J. Food Sci., 2023, 41(4):248-262 | DOI: 10.17221/67/2023-CJFS


Triticale (× Triticosecale Wittmack) is a hybrid cereal prepared by crossing wheat and rye. Triticale grain contains substances that have a positive effect on reducing the risk of cardiovascular disease, obesity, cancer, and type 2 diabetes, as well as increasing body's immune response and intestinal function, which warrants a need for greater attention to research on triticale crop's nutritional composition. This review covers the most recent research on the nutritional composition of triticale grain in comparison to other cereals, its role in the food industry, and its usage as a food, providing a scientific foundation for triticale's further development as a sustainable crop. Due to the wide variety of chemical compounds revealed in triticale grain, it has the potential to be utilised as a substitute cereal for various food and beverages.

Comparison of three different methods for the determination of sulphur dioxide in fruit and vegetable productsOriginal Paper

Novel Kishor Bhujel, Eugene Okraku Asare, Tereza Podskalská, Kshitiz Pokhrel, Filip Beòo, Vojtìch Kru¾ík, Ale¹ Rajchl, Helena Èí¾ková

Czech J. Food Sci., 2025, 43(1):1-7 | DOI: 10.17221/113/2024-CJFS

Sulphite is a food additive used worldwide. Globally, for concentrations above 10 mg·kg–1, sulphite compounds must be labelled as sulphur dioxide (SO2) on the packaging due to their potential health risks. This study compares spectrophotometric (S), titration (T) (modified optimised Monier-Williams, OMW), and reflectoquant (R) methods for measuring sulphur dioxide in twenty fruit and vegetable products. The samples comprise sulphited, unsulphited, and naturally sulphur-containing products (Allium genus such as garlic and onion). The article discusses the strengths and weaknesses of the method used. Allium genus samples yielded false-positive results, especially in fresh garlic samples with average SO2 concentrations of 46, 1 152, and 40 mg·kg–1 obtained by titration, spectrophotometric, and reflectoquant methods, respectively, therefore, none of the methods is suitable for testing this type of vegetables or products containing a low proportion of them. For other types of samples, the methods showed acceptable working characteristics. Recovery tests showed 89.5, 82.0, and 75.2% recovery with 2.8, 3.9, and 13.2% repeatability and the limit of quantification of 1, 10, and 25 mg·kg–1 in the spectrophotometric, titration, and reflectoquant methods. The result highlights the importance of method selection based on sample characteristics and regulatory compliance.

Effects of flour, starch and pea (Pisum sativum L.) protein as fat substitutes during storage of pork sausagesOriginal Paper

Gema Morales-Olán, María Antonieta Ríos-Corripio, Marlon Rojas-López, Joel Velasco-Velasco, Aleida Selene Hernández-Cázares

Czech J. Food Sci., 2025, 43(3):194-204 | DOI: 10.17221/211/2024-CJFS

Efforts are being made to replace the fat in meat products such as sausages with vegetable compounds to generate healthier foods. In this work, the effects of including flour, starch, and proteins isolated from pea seeds as partial fat substitutes in pork sausages was evaluated by studying the proximate composition, energy content, total cholesterol, lipid oxidation, and physicochemical, textural, and structural properties during refrigerated storage. The results showed significant differences in the composition of the sausages. Low-fat flour (LFF), starch (LFS), and pea protein (LFP) sausages had approximately 18% lower energy content than high-fat (HF) sausages. Cholesterol content was not significantly different in the treatments. Cooking yield, pH, and water activity were not affected by the inclusion of the replacements. LFF sausages had the highest purge losses and LFP sausages the lowest. The addition of pea starch improved the luminosity of the sausages, but the addition of pea protein resulted in darker sausages. After 12 days of storage, no differences were found between the hardness of LFP and HF sausages. The replacements did not affect lipid oxidation. The results suggest that replacing fat with pea seed components may be an alternative to producing low-fat sausages with health benefits.

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