A5034009196- Edible Oils Quality and Analysis
- Phytochemicals and Antioxidant Activities
- Free Radicals and Antioxidants
- Food Chemistry and Fat Analysis
- Antioxidant Activity and Oxidative Stress
- Phytoestrogen effects and research
- Lipid metabolism and biosynthesis
- Probiotics and Fermented Foods
- Proteins in Food Systems
- Plant biochemistry and biosynthesis
- Microbial Metabolites in Food Biotechnology
- Fatty Acid Research and Health
- Biodiesel Production and Applications
- Archaeology and ancient environmental studies
- Enzyme Catalysis and Immobilization
- Cholesterol and Lipid Metabolism
- Meat and Animal Product Quality
- Isotope Analysis in Ecology
- Sesame and Sesamin Research
- Protein Hydrolysis and Bioactive Peptides
- Spectroscopy and Chemometric Analyses
- Silymarin and Mushroom Poisoning
- Bee Products Chemical Analysis
- Natural product bioactivities and synthesis
- Ancient and Medieval Archaeology Studies
University of Chemistry and Technology, Prague
2016-2025
Plant (United States)
2023
Slovak University of Technology in Bratislava
2019
Institute of Chemical Technology
2013
Oilseed cakes are produced as a by-product of oil pressing and mostly used feed. Their use for human consumption is due to the functional properties benefits health. Herein, oilseed cake flours eight species (flax, hemp, milk thistle, poppy, pumpkin, rapeseed, safflower, sunflower) were sieved into fractions above (A250) below (B250) 250 µm. The chemical composition, SDS-PAGE profiles, colour, antioxidant activities these evaluated. B250 evaluated being protein ash rich, reaching crude...
The aim of the bioassay-guided fractionation was selection most potent group compounds responsible for protection sunflower bee pollen grains. Synthesis prospective antifungal polyamides hydroxycinnamic acids based on previous structural elucidation ethanol soluble fraction by 1H,1H-PFG-COSY, 1H,13C-HSQC, FT-IR, FT-Raman, and LC-MS experiments. main found were tri- p-coumaroylspermidines accompanied other HCAA spermidine putrescine. Several model derivatives prepared to test their activity...
The focus on healthier alternatives has brought about the need to study physical properties of fats more thoroughly. Currently, major aim is develop systems that bring desired final products and, ideally, can additionally enhance their health benefits for consumers. Research often begins with understanding behavior single TAG molecules and gradually moves toward multicomponent systems. In our study, phase three minor triacylglycerols cocoa butter was determined. synthesized...
The bark of Norway spruce (Picea abies) has been a source medications for centuries. Despite that, is waste biomass produced by wood industry in million tons annually. most abundant compounds obtained from hexane extracts were sterols and terpenes subjected to silico analysis. Their absorption, distribution, metabolism excretion properties possible types biological activities predicted. Abietic acid, dehydroabietic acid β-caryophyllene oxide originated had likely antihypercholesterolemic,...
The most important acylglycerol chloroderivatives identified in foods are 3-chlorpropane-1,2-diol fatty acid esters (3-CPD esters) that accompanied by epoxypropanol formed processed and, particularly, during the deodorisation of vegetable oils. Their content refined oils is influenced oil composition, refining process conditions and hydrogenation. Described discussed here main pathways lead to formation acylglycerols esters. article offers detailed explanation reaction mechanisms using...
Antioxidant properties of mono- and dihydroxyphenolic acids their alkyl esters were examined, with emphasis on the relationship between molecular structure antioxidant activity. Test media different tocopherol level used for determining oxidative stability: original refined sunflower oil (total tocopherols 149.0 mg/kg), partially tocopherol-stripped 8.7 mg/kg) distilled fatty acid methyl (FAME) as a tocopherol-free medium. The chemical reaction diazomethane tested purpose to eliminate...
The paper describes laboratory deodorization of rapeseed oil (Ro), model sunflower (SoM), and (RoM) oils, its effect on the tocopherol content kinetics degradation. We now present a novel approach to analysis alpha‐tocopherol degradation product as well kinetic study esters with fatty acids alpha‐tocopheryl quinones. Alpha‐tocopherol were found be principal products tocopherols in high temperature experiment. A deodorization, lasting 2 h caused formation 70–128 mg/kg oils 25 without...
The addition of flaxseed meal and oil on the growth viability Lactobacillus acidophilus CCDM 151 yoghurt culture 21 during cold storage in fermented milk was tested. It found that amount 0.6% w/w did not influence acid production 151, while acidification activity slightly lower compared to pure connected with Streptococcus thermophilus. On contrary 7.6% into stimulated 151. both tested cultures one month milks at 5 ± 1°C influenced by supplementation but decreased their significantly....
This work focuses on degradation of α‐tocopherol and formation products in sunflower oil heated at frying temperature. We determined the content measured kinetics α‐tocopherol, α‐tocopheryl quinone, fatty acid without aeration (So) aerated (air flow 20 L/h) (SoAir). During 10 h So heating, was depleted quinone grew from 3 to 84 mg/kg, as did tocopherol free esters initial 5 185 mg/kg. In SoAir oil, rate constants decomposition were determined. Accelerated oxidation caused depletion after 2...
The antioxidant activity and the tocopherol polyphenol contents of organic grapevines residue were analyzed after Soxhlet extraction grape seeds skin with ethanol petroleum ether. highest was determined for extract 58.65 μM Trolox/mg, which four times higher than at 14.24 Trolox/mg. It comparable to that alpha-tocopherol (62.28 Trolox/mg) butylated hydroxyanizol (69.55 Trolox/mg). A concentration 29.5 μg/mL seed needed decrease initial DPPH radical by 50%. high because (402.28 mg/kg) total...
Elongation of the Very-Long-Chain Fatty Acids-4 (ELOVL4) enzyme that is expressed in neuronal tissues, sperm, and testes mediates biosynthesis very-long-chain polyunsaturated fatty acids (VLC-PUFAs) from dietary long chain PUFAs (LC-PUFAs). The VLC-PUFAs are critical for reproductive function. Therefore, mutations ELOVL4 affect VLC-PUFA contribute to retinal degenerative diseases including Autosomal Dominant Stargardt-like Macular Dystrophy (STGD3). Recent studies have also shown not only a...
The research is focused on the quantitative evaluation of flaxseed (Linum usitatissimum L.) proteome at level seed cake (SC), fine flour—sieved a fraction below 250 µm (FF)—and protein concentrate (PC). was performed three oilseed flax cultivars (Agriol, Raciol, and Libra) with different levels α-linolenic acid content using LC-MS/MS (shotgun proteomics) analysis, which finalized by database searching NCBI for Linum related species. A total 2560 groups (PGs) were identified, their relative...
The influence of flaxseed variety composition on probiotics (Lactobacillus acidophilus, Lb. helveticus, Bifidobacterium sp.) was determined. varieties were added into milk in four forms: whole seed, ground meal, and oil. fermentation all samples performed under the same conditions (37°C, 18 h) then count concentration formed organic acids meal does not seem to have any significant prebiotic effect. However, our results suggest that oil from with a high level ALA could improve bacterial...
Single-cell oil (SCO) produced by oleaginous microorganisms is potentially a more land-efficient and sustainable alternative to vegetable oil. The cost of SCO production can be reduced value-added co-products like squalene, highly relevant compound for the food, cosmetic, pharmaceutical industry. For first time, squalene in yeast Cutaneotrichosporon oleaginosus was analyzed, reaching 172.95 ± 61.31 mg/100 g lab-scale bioreactor. Using monooxygenase inhibitor terbinafine, cellular...
As a source of nutritionally important components, hemp seeds are often dehulled for consumption and food applications by removing the hard hulls, which increases their nutritional value. The hulls thus become waste, although they may contain valuable protein items, about there is lack information. present work therefore aimed at evaluating proteome (Cannabis sativa L.) whole-seed, seed, hull levels. evaluation was performed on two cultivars, Santhica 27 Uso-31, using LC-MS/MS analysis. In...