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Exploring the potential use of two species of Dioscorea in composite flours for bakery productsOriginal PaperMartin Amador Meza-Nieto, María Guadalupe Torres-Cardona, Sergio Soto-Simental, Antonio de Jesús Cenobio-Galindo, Rubén Jiménez-AlvaradoCzech 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 [930.5 mg GAE · (100 g)–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 ± 11.9 mm at 20% substitution), compared to the control (21.4 ± 2.7 mm), 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 PaperTouseef Iqbal, Muhammad Sohaib, Sanaullah Iqbal, Habib RehmanCzech J. Food Sci., 2024, 42(3):174-183 | DOI: 10.17221/158/2023-CJFS
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Quality assessment of elderberry (Sambucus nigra L.) jamsOriginal PaperOana-Viorela Nistor, Doina-Georgeta Andronoiu, Liliana CecluCzech J. Food Sci., 2025, 43(1):48-58 | DOI: 10.17221/111/2024-CJFS
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Effects of dried fig flour incorporation as a natural additive on nutritional composition and sensory assessment of biscuitOriginal PaperBerrighi NabilaCzech 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 PaperLucia Bene¹ová, Silvia Jakabová, Ladislav Ondru¹, Jozef GolianCzech 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 analysisCorrigendumMarek KowalczykCzech J. Food Sci., 2023, 41(1):78 | DOI: 10.17221/26/2023-CJFS |
Molecular hydrogen content of different dietary supplementsShort CommunicationSergej Ostojic, Milan VranesCzech J. Food Sci., 2024, 42(2):136-140 | DOI: 10.17221/16/2024-CJFS
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Bioactive compounds and antioxidant activities of selected types of chilli peppersOriginal PaperTerezia Hudáková, Monika ©uleková, Jan Tauchen, Martina ©emeláková, Matú¹ Várady, Peter PopelkaCzech J. Food Sci., 2023, 41(3):204-211 | DOI: 10.17221/45/2023-CJFS
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Investigation of multimycotoxins by LC-MS/MS in maise semolina chipsOriginal PaperOktay Samadzade, Karlo Muratoğlu, Serkan Kemal BüyükünalCzech J. Food Sci., 2023, 41(3):212-220 | DOI: 10.17221/241/2022-CJFS
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Meat quality - Genetic background and methods of its analysisReviewMarek Kowalczyk, Agnieszka Kaliniak-Dziura, Micha³ Prasow, Piotr Domaradzki, Anna LitwiñczukCzech 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 |
Microalgae in lab-grown meat productionReviewArturo Nickolay Rojas-Tavara, Alberto Jesus Donayre-TorresCzech J. Food Sci., 2023, 41(6):406-418 | DOI: 10.17221/69/2023-CJFS
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Phytochemical, antioxidant activity, and thermal stability of Clitoria ternatea flower extractsOriginal PaperSy-Yu Shiau, Yuhan Wang, Yanli Yu, Songling Cai, Qian LiuCzech J. Food Sci., 2024, 42(4):284-294 | DOI: 10.17221/68/2024-CJFS
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Influence of the ageing time on the quality of three kinds of cold-climate mountain grape brandyOriginal PaperFang Gu, MengYing Gao, XueFeng Wang, MeiQi Lv, JinLong Zuo, Chong Tan, Zhi Xia, JunSheng LiCzech 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 PaperJi Zhang, Rui Hou, Yuhang Luo, Xiaohong Zhang, Hong Luo, Lei Ling, Liping XiangCzech 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 PaperPavel Nevrkla, Eva Weisbauerová, Svitlana Karvan, Jan Seèkáø, Zdenìk Hada¹, Miroslav Rozkot, Drahomíra Ètvrtlíková KnitlováCzech 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 PaperAshraf 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 PaperXiaolong Ji, Shuli Zhang, Xin Du, Yuning Zhang, Yang Yao, Yingying ZhuCzech J. Food Sci., 2025, 43(4):300-310 | DOI: 10.17221/144/2024-CJFS
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The effect of chitosan enriched with different essential oils on the physicochemical and microbiological quality of trout burgers stored at 4 °COriginal PaperWadah Elsheikh, Ilknur UcakCzech 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 (P < 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 PaperEngin Gündoğdu, Fatma HezerCzech J. Food Sci., 2025, 43(2):129-139 | DOI: 10.17221/93/2024-CJFS
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Consumer sensory evaluation of flavour enhancers derived from snail protein hydrolysate using the Rate-All-That-Applies methodOriginal PaperDedin Finatsiyatull Rosida, Dina Mustika Rini, Dwi ErnawatiCzech 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 (P < 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 PaperErdi Eren, Murat Reis AkkayaCzech 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 PaperHan Wu, Xiayidan Maimaiti, Ying Wang, Anthony Pius Bassey, Nurgvl Rahman, Xiaoli LiuCzech 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 PaperLibor Kalhotka, Jana Zemanová, Petr Kouøil, Radek Valach, Joná¹ Novotný, Miroslav Jùzl, Jan SlováèekCzech 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 PaperChunyan Xie, Juan Du, Chunmiao Xing, Xu Zhang, Lan Wang, Hongzhang Chen, Tong LinCzech 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 PaperSezen Harmankaya, Ahmet Harmankaya, Koray ݺbarali, Özlem İstanbullu PaksoyCzech J. Food Sci., 2024, 42(4):251-262 | DOI: 10.17221/56/2024-CJFS
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The potential of probiotics derived from functional foods for skin healthReviewEunhye SonCzech 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 PaperÖzlem Üstün-AytekinCzech 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 triticaleReviewSvetlana Kamanova, Yernaz Yermekov, Kamran Shah, Azigul Mulati, Xuebu Liu, Berdibek Bulashev, Dana Toimbayeva, Gulnazym OspankulovaCzech J. Food Sci., 2023, 41(4):248-262 | DOI: 10.17221/67/2023-CJFS
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Comparison of three different methods for the determination of sulphur dioxide in fruit and vegetable productsOriginal PaperNovel Kishor Bhujel, Eugene Okraku Asare, Tereza Podskalská, Kshitiz Pokhrel, Filip Beòo, Vojtìch Kru¾ík, Ale¹ Rajchl, Helena Èí¾kováCzech 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 PaperGema Morales-Olán, María Antonieta Ríos-Corripio, Marlon Rojas-López, Joel Velasco-Velasco, Aleida Selene Hernández-CázaresCzech 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. |
