A5027810982- Phytochemicals and Antioxidant Activities
- Advanced Chemical Sensor Technologies
- Analytical Chemistry and Chromatography
- Phytochemistry and Biological Activities
- Analytical chemistry methods development
- Insect and Pesticide Research
- Chromatography in Natural Products
- Plant biochemistry and biosynthesis
- Essential Oils and Antimicrobial Activity
- Bee Products Chemical Analysis
- Antioxidant Activity and Oxidative Stress
- Natural product bioactivities and synthesis
- Phytochemical and Pharmacological Studies
- Gas Sensing Nanomaterials and Sensors
- Pesticide Residue Analysis and Safety
- Insect-Plant Interactions and Control
- Fermentation and Sensory Analysis
- Metabolomics and Mass Spectrometry Studies
- Mass Spectrometry Techniques and Applications
- Natural Antidiabetic Agents Studies
- Plant and animal studies
- Free Radicals and Antioxidants
- Genomics, phytochemicals, and oxidative stress
- Insect Pheromone Research and Control
- Hops Chemistry and Applications
Nicolaus Copernicus University
2015-2024
University of Gdańsk
2022
Gdańsk Medical University
2022
University of Warsaw
2022
University of Łódź
2022
University of Białystok
2022
Gdańsk University of Technology
2022
Adam Mickiewicz University in Poznań
2022
Warsaw University of Technology
2022
Silesian University of Technology
2022
Abstract Background Lung cancer is one of the leading causes death in Europe and western world. At present, diagnosis lung very often happens late course disease since inexpensive, non-invasive sufficiently sensitive specific screening methods are not available. Even though CT diagnostic good, it must be assured that "screening benefit outweighs risk, across all individuals screened, only those with cancer". An early would improve prognosis enlarge treatment options. Analysis exhaled breath...
Background: Analysis of exhaled breath is a promising diagnostic method. Sampling non-invasive and can be performed as often considered desirable. There are indications that the concentration presence certain volatile compounds in lung cancer patients different from concentrations healthy volunteers. This might lead to future test for cancer.
We analysed breath and inhaled room air samples from 39 healthy volunteers (28 non-smokers, 8 smokers 3 ex-smokers) by SPME–GC-MS. Mixed expiratory indoor were collected in freshly cleaned Tedlar bags. Eighteen millilitres of each sample transferred into sealed, evacuated glass vials, preconcentrated solid-phase microextraction (SPME, carboxen/polydimethylsiloxane) investigated gas chromatography with mass spectrometric detection (GC-MS). For the unequivocal identification potential marker...
Among pesticides and foliar sprays involved in the treatment of seed, soil, grass, also to crops, an important group is neonicotinoids. Neonicotinoid present similar properties with nicotine, but mentioned compounds are less harmful for humans. Nevertheless, neonicotinoids poisonous insects some invertebrates, which can act against insects' central nervous system, leading their death. Moreover, affect reproduction, foraging, flying ability honeybee other including pollinators. In study,...
Today, great emphasis is placed on the search for and dissemination of native plant materials in various industries, with particular food, cosmetics, dietary supplements, as livestock feed a source biomass. Solid-liquid extraction (SLE), solid phase (SPE), ultra-high-performance liquid chromatography coupled tandem mass spectrometry (UHPLC-MS/MS) methods were developed simultaneous determination 30 flavonoids phenolic acids (lucerne (Medicago sativa L.), goldenrod (Solidago virgaurea...
Honey is a natural sweetener, with an osmotic effect on microorganisms due to the increased sugar content and low amount of water. Cyclitols are minor constituents honey. They play defensive role in plants against unfavorable environmental conditions. Honey’s physicochemical properties can vary, resulting wide range colors, flavors, scents, antioxidant activity, dissimilar values pH, acidity, electrical conductivity, etc. Some literature regarding correlation between honey types already...
In the presented work identification of microorganisms isolated from various types honeys was performed. Martix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) and 16S rDNA sequencing were applied to study environmental bacteria strains.With both approches, problematic spore-forming Bacillus spp, but also Staphylococcus spp., Lysinibacillus Micrococcus spp. Brevibacillus spp identified. However, application spectrometric technique allows for an...
An alternative to other universal detection methods like refractive index (RI), low wavelength or ultraviolet (UV), and evaporative light scattering (ELSD), chemiluminescent nitrogen is a relatively new method based upon aerosol charging involves Corona-charged (Corona-CAD). Some reports show that the sensitivity of this lower than fluorescence detection. Others confirm approximately five times higher conventional UV absorbance for selected analytes. This reason Corona-CAD can be widely used...
The main aim of investigations was to identify chemotypes and determine differences between some domestic hop varieties wild hops, which were collected from regions Lithuania cultivated at the same edafoclimatic conditions in hops collection Kaunas Botanical Garden Vytautas Magnus University. One objectives compare essential oils (2 years harvest) by evaluation volatiles content. Among components monoterpenes (β-myrcene) sesquiterpenes (α-humulene β-caryophyllene) determined using gas...
For determination of selected carotenoids, various types columns for high-performance liquid chromatography (HPLC) with different properties have been used. The characteristics the laboratory-used packing material containing monomeric alkyl-bonded phases (C
Due to the important features of widely unexplored cyclitols, a comprehensive qualitative and quantitative study is needed. Moreover, measuring possible available amounts identified components in plant material represents stringent need, due their importance phytomedicine use food. The purpose this was realize an extended investigation mainly but sugars sugar alcohols as well, from natural sources. Thus, 17 target compounds (7 cyclitols 2 8 sugars) extracted medicinal edible plants are...
In this study, phenolic compounds and their antioxidant activity in the pollen of anemophilous Betula Pinus were determined. Spectrophotometric, high-performance thin-layer liquid chromatography methods applied. Free (free PC) bound to cell wall (bound analysed extracts. Regardless species, content was 20% higher than that PC extracts contained 2.5 times less compared Betula. extraction from deeper layers minimal; same obtained both types The bioactivity (p < 0.05) is related flavonoids free...
This study was carried out to determine the total antioxidant activity of selected green vegetables like kale and spinach. The expressed in radical scavenging (RSA). generation DPPH· (1,1-diphenyl-2-picrylhydrazyl) free forms basis one spectrophotometric methods that has been applied measurement extracts solutions pure substances. Among examined vegetables, spinach showed highest activity. RSA values for samples frozen varied from 16.2% 42.6%, but fresh did not exceed 19.8%. Kale were...
Abstract Cyclitols are phytochemicals naturally occurring in plant material, which attracted an increasing interest due to multiple medicinal attributes, among the most important antidiabetic, antioxidant, and anticancer properties. Due their valuable properties, sugars used food industry as sweeteners, preservatives, texture modifiers, fermentation substrates, flavoring coloring agents. In this study, we report for first time quantitative analysis of cyclitols isolated from Solidago...
A method development for determination of neonicotinoid residues in honey samples was developed. The proposed methodology consisted QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe). That used sample preparation UHPLC/UV (ultra-performance liquid chromatography with ultraviolet detection) utilized chromatographic analysis. developed proved to be sensitive, LOD (Limit value the range 60.80 80.98 ng/g hence LOQ quantification) 184.26 245.40 ng/g. has tested on Polish applied from...
The objective of these investigations has been the determination volatile organic compounds including residue solvents present in vegetable oil samples. Some olive oil, rape sunflower soy-bean pumpkin grape rice as well hazel-nut samples were analysed. Among following have mentioned: acetone, n-hexane, benzene, and toluene. experiments for solid phase microextraction (SPME)-GC-flame ionisation detection (FID) performed to examine extraction conditions such fiber exposure time, temperature...
The main aim of this study was to develop a method for the isolation and determination polyphenols—in particular, flavonoids present in various morphological parts plants belonging cabbage family (Brassicaceae). Therefore, procedure consisting maceration, acid hydrolysis measurement total antioxidant capacity plant extracts (using DPPH assay) conducted. Qualitative analysis performed employing thin-layer chromatography (TLC), which presented be suitable methodology separation chemopreventive...