Fulltext search in archive
Results 91 to 120 of 380:
Chemical composition of dietary alfalfa and its effectiveness on broiler chicken thigh meat qualityOriginal PaperPetru Alexandru Vlaicu, Arabela Elena Untea, Raluca Paula Turcu, Mihaela Saracila, Iulia Varzaru, Alexandra Gabriela OanceaCzech J. Food Sci., 2023, 41(4):279-286 | DOI: 10.17221/79/2023-CJFS
|
Extraction and enzymatic modification of dietary fibre from purple aubergineOriginal PaperSuwalee Fong-in, Kamonlak Wicharaew, Pattaramon Phalapan, Trakul PrommajakCzech J. Food Sci., 2023, 41(4):304-312 | DOI: 10.17221/84/2023-CJFS This research scrutinised the opportunity of upcycling waste from the food industry by extracting dietary fibre from purple aubergine. One of the challenges addressed was enzymatic browning, which negatively influenced the quality of the fibre extracted from fresh aubergine. Various pre-treatment procedures were assessed, including using citric acid, sulphite immersion, peeling and thermal processing, to determine their effects on extraction yield, colour, and the functionality of the resultant dietary fibre. Findings indicated that a pre-treatment method involving aubergine peeling, sulphite solution immersion, and subsequent steaming before extraction produced optimal results, enhancing both whiteness index and water-holding capacity. Experiments were conducted with traditional enzymes supplemented with cellulase, xylanase, and lipase for enzymatic extraction. The addition of lipase notably elevated the extraction yield and water-holding capacity, albeit with an undesired darkening effect on the dietary fibre. In contrast, the application of xylanase emerged as the most effective treatment, delivering the highest overall quality for the derived dietary fibre. |
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
|
Promotional effects on naturally occurring lactic acid bacteria without impairing chickpea germinationOriginal PaperEli¹ka Kováøíková, Veit Ny, Miloslav ©ulc, Jana Rysová, Natálie Peèenková, Milan Hou¹kaCzech J. Food Sci., 2024, 42(2):85-92 | DOI: 10.17221/12/2024-CJFS
|
Enhancement of semolina pasta with carob molasses pulpOriginal PaperSerpil Yalim Kaya, Sevcan İlhan, Özlem İstanbulu PaksoyCzech J. Food Sci., 2024, 42(2):109-117 | DOI: 10.17221/152/2023-CJFS This study aimed to determine the effect of carob molasses pulp flour (CMP) at 5.0, 7.5, and 10.0% on the chemical composition and properties of eggless semolina pasta in terms of colour, nutritional value, cooking quality, and sensory properties. As presumed, carbohydrate and energy values of CMP-added pasta (carbohydrates 73.31–77.40%) were lower than the control (82.17%), whereas dietary fibre values were up to 4 times higher (8.18–12.60% vs. 3.71%). There was not a significant difference in the amount of fat (0.48–0.70%), optimum cooking time (6.56–7.06 min), or cooking loss (10.43–12.57%) of CMP-added pasta compared to the non-enriched counterpart (P > 0.05). All formulations were sufficient in terms of sensory properties; colour shift occurred in the direction from standard yellow to the dark brown area. The results showed that even the maximal tested dosage of the CMP equal to 10.0% could produce pasta with satisfying overall quality. |
Influence of the storage duration on the health promoting tyrosine, tryptophan, and total phenolics in potato tubersOriginal PaperRita Asakaviciute, Zita MaknickieneCzech J. Food Sci., 2024, 42(2):93-99 | DOI: 10.17221/161/2023-CJFS This research investigated the influence of the storage duration on the health promoting tyrosine, tryptophan and total phenolics in potato tubers. In the course of storage, the total amount of accumulated compounds in the dry mass of organically grown potato tubers increases. This is determined by individual properties of potato variety, storage time, and interaction of these two factors (P < 0.05). Organic potato tubers show increased total phenolic compounds in their dry matter during storage. This is due to a variety of characteristics, storage time and the interaction of these two factors (P < 0.05). A more pronounced increase in total phenolic compounds during storage was observed in 2022 than in 2021. |
Development of a layered double hydroxides-based air-assisted D-μSPE method in combination with HPLC for the determination of gallic acid in honeyOriginal PaperYumei Xiao, Yang Jiang, Tian Liu, Yuanyi Wu, Jialin He, Tian Liu, Yi YangCzech J. Food Sci., 2024, 42(2):100-108 | DOI: 10.17221/222/2023-CJFS
|
Chokeberry (Aronia melanocarpa) as natural antioxidant for the meat industryOriginal PaperAndrea Mesáro¹ová, Marek Bobko, Luká¹ Jurèaga, Alica Bobková, Katarína Poláková, Al¾beta Demianová, Judita Lidiková, Ondøej Buèko, Andrea Mendelová, Tomá¹ TóthCzech J. Food Sci., 2024, 42(3):184-191 | DOI: 10.17221/38/2024-CJFS Aronia melanocarpa is one of the many fruit types rich in polyphenolic compounds. Therefore, we used this fruit in our research as a possible natural antioxidant, which was added to pork sausages. Four groups were prepared: control group, a group with ascorbic acid, and groups with 3 and 5 mL·kg–1 of chokeberry extract. During storage, we monitored changes in pH, colour, texture and oxidative stability of pork sausages and sensory evaluation. We did not observe any negative effects of the extract on the quality of pork sausages during storage. Regarding oxidative stability, the lowest increase in malondialdehyde (MDA) was observed in the group with 5 mL·kg–1 of chokeberry extract, which was comparable to the group with ascorbic acid. |
Enriching wheat flour with grape pomace powder impacts a snack's chemical, nutritional, and sensory characteristicsOriginal PaperAmal Hassan AlshawiCzech J. Food Sci., 2024, 42(4):243-250 | DOI: 10.17221/103/2024-CJFS
|
Nanocellulose as a fat substitute to improve the quality of emulsified sausages: Effects of morphology and contentOriginal PaperHongzhen Guo, Xiaolan Shang, Yunping Cheng, Qiuling LiCzech J. Food Sci., 2024, 42(5):364-371 | DOI: 10.17221/114/2024-CJFS Two different morphologies of nanocellulose – cellulose nanofibres (CNFs) and cellulose nanocrystals (CNCs) with different contents were added to emulsified sausages to replace pork back fat in different proportions (10%, 30%, and 50%), and the colour, emulsion stability, texture characteristics and dynamic rheological behaviour of emulsified sausages were analysed. The results indicate substituting fat with nanocellulose led the L* (lightness) and a* (redness) values increased and the b* (yellowness) values decreased of the emulsified sausages. Increasing nanocellulose concentration improved the emulsion stability of the sausages. In terms of emulsion stability, the use of CNFs outperformed CNCs, especially for samples substituted with 50% fat. In terms of texture, emulsified sausages where CNCs replaced fat showed lower hardness, viscosity, and chewiness compared to those with CNFs. The dynamic rheological results indicated that when the fat replacement levels were 10% and 30%, samples using CNFs as fat substitute had slightly higher storage modulus (G') values than those using CNCs. However, for 50% fat replacement, samples using CNFs as fat substitute had significantly higher G' values than those using CNCs, which demonstrates that higher CNFs concentrations are more conducive to the formation of a three-dimensional network structure. |
Combining germination-extrusion as strategy to improve nutritional and nutraceutical value of whole sorghum grainOriginal PaperLuisa Fernanda Madrigales, Cuauhtémoc Reyes, Maribel Jiménez, Roberto Gutiérrez, Janitzio Xiomara Korina PeralesCzech J. Food Sci., 2024, 42(6):456-464 | DOI: 10.17221/210/2023-CJFS
|
Palm date (Phoenix dactylifera) seeds: A rich source of antioxidant and antibacterial activitiesOriginal PaperAbuelgassim Omer Abuelgassim, Mohamed Abdellatif Eltayeb, Farid Shokry AtayaCzech J. Food Sci., 2020, 38(3):171-178 | DOI: 10.17221/269/2019-CJFS Two varieties of palm date seeds (PDS), Sukkari and Khalas, were examined for their antioxidant and antibacterial activities. Total phenol content was 2 014.37 ± 212.05 and 2 060.40 ± 176.0 mg GAE 100 g-1 dry weight (DW); and total flavonoid content was 83.98 ± 1.10 and 94.97 ± 1.36 mg QE 100 g-1 DW for Sukkari and Khalas, respectively. PDS extracts showed potential scavenging activity against ABTS, DDPH, and hydroxyl radical; the calculated IC50s were 431.17 ± 12.45, 400 ± 10.87 and 680 ± 18.12 µg for Sukkari, and 476 ± 20.25, 302.24 ± 14.08 and 284.18 ± 11.62 µg for Khalas, respectively. PDS extracts did not show potential activity against superoxide anion. Both extracts showed a high percentage of reducing power as the calculated FRAP (ferric reducing antioxidant power) concentrations were 12.66 ± 1.08 and 16.14 ± 1.94 mmol ascorbic acid equivalent 100 g-1 for Sukkari and Khalas, respectively. Bacillus subtilis showed a remarkable sensitivity to PDS extracts; the inhibition zones were 21 ± 0.82 and 22 ± 0.67 mm for Sukkari and Khalas, respectively. PDS extracts possess good antioxidant and antibacterial activity, and therefore PDS could be effectively used as a natural source of antioxidants and to be detected against gram-positive bacteria. |
Chemical, nutritional, and bioactive compositions of fresh, washed, and blanched shiitakeOriginal PaperJeng-Leun Mau, Jim Tseng, Cheng-Rong Wu, Chien-Hung Chen, Sheng-Dun LinCzech J. Food Sci., 2021, 39(6):426-434 | DOI: 10.17221/214/2020-CJFS Washing and blanching are two important steps for the processing of fresh good grade small shiitake into casual snacks and prepared foods. This study explored their effects on the dimensions, weights, proximate compositions, taste and bioactive compounds of the shiitake caps and stipes. Results showed that the dimensions and weights of the caps and stipes increased after washing but decreased after blanching. On a dry basis, washing did not affect the nutrients and bioactive compounds contents of shiitake except sugars and polyols compared to fresh samples. However, blanching greatly reduced all the quality contents of the shiitake. The major minerals in the caps and stipes were potassium, magnesium and calcium. The main polyol, sugar, free amino acid, and 5'-nucleotide of shiitake were mannitol, trehalose, glutamine and 5'-adenosine monophosphate, respectively. Equivalent umami concentration (EUC) in the caps was three-fold higher than that in the stipes. Ergosterol, ergothioneine, γ-aminobutyric acid (GABA), and total phenols contents in the caps were significantly higher than those of the stipes, but the polysaccharides showed the reversed. Overall, both caps and stipes contain the necessary nutrients and bioactive compounds, and the blanching significantly affected the above-mentioned components of all tested samples. |
The state of water is associated with the viability and acidification capacity of Lactobacilli in frozen sourdoughOriginal PaperDi Chen, Qiang Cheng, Xinxin Xia, Shihua Chen, Changqing Shao, Jing Li, Jinshui Wang, Xingquan WuCzech J. Food Sci., 2021, 39(6):435-443 | DOI: 10.17221/82/2021-CJFS The correlations between water state and the key factors affecting sourdough quality, including cell activity and acidification capacity of lactic acid bacteria (LAB), were established in this study. Results revealed that with the increase of frozen storage time, the cell density (CD), total titratable acidity (TTA), and organic acids content declined, whereas the pH value rose. Further, the freezable water content (FWC) and free water quantity (FWQ) decreased, but the total water loss rate (WLR) and immobilised water quantity (IWQ) increased. The CD showed a highly inversely correlation with WLR, and the pH value was strongly inversely correlated to the FWQ. The confocal laser scanning microscopy (CLSM) observed that the ice crystals had larger volumes during frozen storage. Our data, for the first time, disclosed that the total water content and the FWQ may play a crucial role in maintaining the viability and acidification capacity of LAB in frozen sourdough. |
Effect of buckwheat flour on microelements and proteins contents in gluten-free breadUrszula Krupa-Kozak, Ma³gorzata Wronkowska, Maria Soral-¦mietanaCzech J. Food Sci., 2011, 29(2):103-108 | DOI: 10.17221/136/2010-CJFS Coeliac disease is an autoimmune gluten-sensitive entheropathy. The only available treatment for it is the life-long adherence to a gluten-free diet although these products are often poor in proteins, minerals, and vitamins. The current study was designed to investigate the effect of buckwheat flour incorporation to a gluten-free experimental formulation on the size-related parameters, and microelements and proteins contents. Buckwheat flour affected positively the technological quality of bread, like bread specific volume index and loaf size. Increasing concentration of buckwheat flour (10-40%) in bread affected the proportional enrichment in proteins and microelements, especially in copper and manganese. |
Functional profile of carob (Ceratonia siliqua L.) beans and pod pulp originated from the Republic of MoldovaOriginal PaperTatiana Capcanari, Aurica Chirsanova, Oxana Radu, Eugenia Covaliov, Violina Popovici, Rodica SiminiucCzech J. Food Sci., 2022, 40(6):465-473 | DOI: 10.17221/139/2022-CJFS This study provides the first insight into the biologically active potential (total phenolic compounds, flavonoids, tannins and antioxidant activity) of Moldavian сarob beans and pod pulp in comparison with carob grown in Algeria, Spain, and Italy. The results showed that the samples of Moldavian carob contain significant amounts (P ≤ 0.05) of biologically active compounds, the content of some of these compounds is far exceeding that of сarob from the above-mentioned regions. Thus, the total content of phenolic compounds in Moldavian carob samples is 1.4 times higher, of flavonoids 1.9 times higher compared to the imported ones. The 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) antioxidant activity of Moldavian carob samples proved to be about 10-12% higher than the antioxidant activity of samples from other regions. It has been proved that Moldavian carob pod pulp and beans have a high biologically active potential making them possible ingredients for functional food products. |
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 |
Current nutritional guidelines in terms of the effect on gut microbiota and human health considering the WHO and FAO recommendationsReviewBarbora Rù¾ièková, Pavel KohoutCzech J. Food Sci., 2023, 41(1):1-7 | DOI: 10.17221/186/2022-CJFS The purpose of this paper is to evaluate current nutritional guidelines of modern diets based on medical and nutrition facts and their effect on gut microbiota and health, considering current recommendations of world authorities such as FAO and WHO. For this purpose, the first part is devoted to the impact of microbiota on human health, and special attention is committed to the effect of fibre on gut microbiota. The second part is dedicated to the fundamental division of diets and the evaluation of concrete nutritional guidelines of modern diets into microbiota and health, followed by the recommendations of global authorities. Modern diets include diets from the point of view of medical science (e.g. Mediterranean), promoted by nutritionists and authorities (e.g. Nordic) and by social trends (e.g. vegan). The evaluation summarises that high-fibre diets have tremendous benefits on human health. Diets with fresh, local and naturally fermented food positively impact the gut microbiota, hence human health (agrarian diets). The results of the review show that the nutritional guidelines associated with the lowest mortality are the Mediterranean with the Atlantic or Nordic diet, which is in line with the recommendation of the world authorities (FAO, WHO, UN). The low-fibre western diet with highly processed foods with no or very low levels of live bacteria appears to be high-risk in terms of preventing civilisation diseases with a negative impact on gut microbiota, which is in line with current FAO and WHO guidelines. |
Potential of moringa (Moringa oleifera) leaf powder for functional food ingredients: A reviewReviewLina Novi Ariani, Teti Estiasih, Wenny Bekti Sunarharum, Alfi KhatibCzech J. Food Sci., 2023, 41(1):8-20 | DOI: 10.17221/221/2022-CJFS
|
Common bean (Phaseolus vulgaris L.) seed germination improves the essential amino acid profile, flavonoid content and expansion indexShort CommunicationLuis Díaz-Batalla, Karina Aguilar-Arteaga, Javier Castro-Rosas, Reyna Nallely Falfán-Cortés, Ricardo Omar Navarro-Cortez, Carlos Alberto Gómez-AldapaCzech J. Food Sci., 2023, 41(1):73-77 | DOI: 10.17221/5/2022-CJFS Common bean (Phaseolus vulgaris L.) is one of the most important grain legume foods for the human diet. Common bean seed is gaining attention due to its content of secondary metabolites with positive effects on human health. The present work analysed the effect of common bean germination on the essential amino acid profile, active compound content, and expansion index after extrusion processing. The content of tryptophan (Trp) in raw common bean (RCB) and in germinated common bean (GCB) seeds was 6.1 and 7.9 mg·g–1 of protein, respectively. The limiting amino acids in RCB were sulphur amino acids and Trp, and in GCB only the sulphur amino acids were the limiting amino acids. The germination process in beans increases the levels of quercetin and kaempferol and allows the synthesis of daidzein and genistein, and significantly increases the expansion index after extrusion processing. The germination of common bean could be used as a strategy to improve nutritional, nutraceutical, and processing properties. |
Coumarin derivatives as antifungal agents – A reviewReviewMirjana Lonèar, Dajana Ga¹o-Sokaè, Maja Molnar*Czech J. Food Sci., 2023, 41(2):79-91 | DOI: 10.17221/178/2021-CJFS Coumarins and pyridines are a promising class of naturally occurring bioactive heterocycles with unique physical and chemical properties. Compounds containing the coumarin framework possess a wide range of pharmacological, biological, and physiological activities, which makes them important for application in medicine, the food industry and agriculture. Among all coumarins' properties, it was found that coumarins may prevent fungal growth, depending on substituents linked to the coumarin core. Therefore, many coumarin derivatives have been investigated as potentially powerful agents in preventing and controlling fungal pathogens. This review summarises the latest research on coumarins and their antifungal activity to provide useful information for further developing more efficient coumarin-based fungicides. |
Estimation of coffee shelf life under accelerated storage conditions using mathematical models – Systematic reviewReviewMaría Alina Cueva Ríos, Frank Fernández Rosillo, Lenin Quiñones Huatangari, Eliana Milagros Cabrejos BarriosCzech J. Food Sci., 2023, 41(2):92-102 | DOI: 10.17221/163/2022-CJFS
|
|
Correlation between acrylamide content and colour in some baked productsOriginal PaperZana Mohammed Abdulazeez, Abdel Moniem Ibrahim Mustafa, Fehmi YaziciCzech J. Food Sci., 2023, 41(2):137-143 | DOI: 10.17221/244/2022-CJFS The objective of this study was to quantify the concentration of acrylamide in biscuits, bread, and cake obtained from industrial and local bakeries, classified based on their colour intensity as light, medium, or dark. The analysis was performed using gas chromatography-mass spectrometry (GC-MS). Sugar, moisture, and asparagine analyses were also carried out simultaneously. The results demonstrated that the acrylamide content in biscuits, bread, and cakes varied according to the colour (light 109.9 ± 7.95, 214.7 ± 27.40, and 128.6 ± 7.05; medium 176.3 ± 15.16, 387.0 ± 87.71, and 804.3 ± 17.16; and dark 407.6 ± 105.13, 555.8 ± 16.20, and 1 015.0 ± 83.68 µg·kg–1, respectively). Statistically, significant differences were observed between acrylamide content and product colour density (P < 0.05). It can be concluded that the acrylamide content increases as the product colour intensity rises due to the increased baking temperature at which the reaction between reducing sugars and asparagine takes place, resulting in the formation of acrylamide. The results suggest that selecting commercial bakery products based on colour may be beneficial for reducing the daily intake of acrylamide by consumers. Therefore, it is recommended to avoid dark-coloured bakery products. |
|
Effect of onion waste powder on the rheological characteristics, sensory attributes, and antioxidant properties of mayonnaiseOriginal PaperTsvetko Prokopov, Kremena Nikovska, Milena Nikolova, Pavel Merdzhanov, Mina Dzhivoderova-ZarchevaCzech J. Food Sci., 2023, 41(3):182-188 | DOI: 10.17221/19/2023-CJFS
|
Impact of lard-based diacylglycerols on the quality and sensory characteristics of emulsion-type sausageOriginal PaperXiaoqin Diao, Weiting Sun, Dengyong Liu*, Haining Guan*, Ruixin Jia, Ying WangCzech J. Food Sci., 2023, 41(3):196-203 | DOI: 10.17221/111/2022-CJFS
|
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
|
|
Selection of drying technology based on dynamic effects on physicochemical properties and flavours of mulberryOriginal PaperBaolin Han, Shulin Tian, Rong Fan, Rangfang Chen, Yu Wang, Hucheng Gong, Minghong BianCzech J. Food Sci., 2023, 41(4):295-303 | DOI: 10.17221/82/2023-CJFS
|
