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Search results for: tyrosine free amino acids equestrian dietary and nutritional supplements lc-ms/ms uv-vis doping
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LC-ESI-MS profiling of Potentilla norvegica and evaluation of its biological activities
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MS Project 2013 i MS Project Server 2013. Efektywne zarządzanie projektem i portfelem projektów
PublicationMS Project 2013 i MS Project Server 2013. Efektywne zarządzanie projektem i portfelem projektów to książka, która kompleksowo opisuje możliwości programu oraz oferowane przez niego narzędzia, uzupełniając wiedzę czytelnika o informacje związane z metodyką prowadzenia przedsięwzięć. Układ podręcznika odzwierciedla specyfikę pracy kierowników projektów, krok po kroku przedstawiając zadania, które mają oni do wykonania, a także najbardziej...
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A method for a comprehensive lipidomic analysis of flaxseed (Linum usitatissimum) with the use of LC–Q-TOF-MS and dispersive micro-solid-phase (μDSPE) extraction
PublicationFlaxseed (FS) is one of the richest sources of α-linolenic acid oil and lignans, and it is suggested that the consumption of flaxseed may contribute to the prevention of certain chronic diseases such as many types of cancer, diabetes, cardiovascular diseases and cerebrovascular stroke. Here, we demonstrate a new method for comprehensive FS lipidome profiling with the use of LC–Q-TOF-MS and dispersive micro-solid-phase extraction....
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Microscopic Imaging to Visualize the Distribution of Dietary Nucleic Acids in Food Products of Various Origins
PublicationDietary nucleic acids (dietNAs) are being increasingly recognized as important food components with nutritional value. However, the precise dietary recommendations for dietNAs are limited, because established methods for determining the quantity and nutritional role of dietNAs are still lacking. One of the tools to narrow this gap could be microscopic imaging, as a convenient approach to visualize the abundance and distribution...
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Journal of Amino Acids
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Rain Gardens LC_MS/MS analysis dataset
Open Research DataThis dataset contains the results of samples analysis (target analysis with certified reference materials) using ultra-high performance liquid chromatography tandem mass spectrometry (UHPLC-MS/MS, Shimadzu, Japan).
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Determination of benzodiazepines and Z-hypnotic drugs in whole blood samples by GC–MS/MS: Method development, validation and application
PublicationBenzodiazepines (BZDs) and Z-drugs are widely used as anxiolytics, sedative hypnotics, anticonvulsants and muscle relaxants. “Designer benzodiazepines” (DBZDs) are a new psychoactive substance class consisting of benzodiazepine derivatives that are not allowed for medical use and are known for being used recreationally. From a toxicologist standpoint, the huge number of such substances implicate a necessity for developing fast...
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Mono- and bimetallic nanoparticles decorated KTaO 3 photocatalysts with improved Vis and UV–Vis light activity
PublicationNew mono- and bimetallic nanoparticle-decorated perovskite-type KTaO3 photocatalysts were successfully synthesized by hydrothermal reaction followed by photodeposition of MNPs/BNPs. The effect of noble metal type, amount of metal precursor as well as photoreduction method on the physicochemical and photocatalytic properties of MNPs- and BNPs-KTaO3 have been investigated. Photocatalytic activity under Vis light irradiation was estimated...
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Plant-based meat substitute analysis using microextraction with deep eutectic solvent followed by LC-MS/MS to determine acrylamide, 5-hydroxymethylfurfural and furaneol
PublicationFor the analysis of plant-based meat substitutes and the determination of Maillard reaction products such as acrylamide, 5-hydroxymethylfurfural and furaneol, a novel and effective procedure based on hydrophobic natural deep eutectic solvent and liquid chromatography coupled with tandem mass spectrometry was developed for the first time. The 49 compositions of the deep eutectic solvents were designed and screened to select the...
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A Robust Method for Sample Preparation of Gastrointestinal Stromal Tumour for LC/MS Untargeted Metabolomics
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Analysis of urinary nucleosides as potential cancer markers determined using LC–MS technique
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Identification of antioxidant polyphenolics from Jasione montana based on a preliminary LC-MS profiling
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Journal of Dietary Supplements
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Nutrition and Dietary Supplements
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MS Report : stwardnienie rozsiane
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International Journal of MS Care
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Identification of novel psychoactive substances 25B-NBOMe and 4-CMC in biological material using HPLC-Q-TOF-MS and their quantification in blood using UPLC–MS/MS in case of severe intoxications
PublicationThis paper describes cases of poisoning caused by new psychoactive substances such as: 25BNBOMe (2-(4-bromo-2,5-dimethoxyphenyl)-N-[(2-methoxyphenyl)methyl]ethanamine) and 4-CMC (1-(4-chlorophenyl)-2-(methylamino)-1-propanone). The analytical procedure includes rapid and selective method for the extraction and determination of 4-CMC and 25B-NBOMe in blood samples using UPLC–MS/MS technique. To the best of our knowledge,this is...
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Total Ionization Cross Sections of Selected Amino Acids
Open Research DataThe data set contains tabulated values of cross-sections for a single electron-impact ionization of selected amino acids (glycine, alanine, phenylalanine, proline and tryptophan) calculated using binary-encouter-Bethe method. The data have been published in graphical form (figure 1) in the following paperA.M. Sheer, P. Mozejko, G.A. Gallup, P.D. Burrow...
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3-Monochloropropane-1,2-diol in Infant Foods and Human Breast Milk: Determination by GC-MS
Publication3-Monochloropropane-1,2-diol is one of the food borne contaminants called chloropropanols. Over the last decade plenty of analytical methods was developed in order to determine 3-monochloropropane-1,2-diol in its free and bound form in various foodstuffs with the use of GC-FID, GC-ECD, LC-TOFMS and finally GC-MS, which is now widely used in laboratories. The aim of this research was the determination of 3-monochloropropane--1,2-diol...
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Determining the true content of quercetin and its derivatives in plants employing SSDM and LC–MS analysis
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The Toolbox of Methods for Multidirectional Characterization of Dietary Nucleic Acids; Verification for Raw and Processed Food Products
PublicationCurrently, the nutritional value of food is associated mainly with components such as proteins, carbohydrates, and lipids. However, another important macromolecules present in many foods are dietary nucleic acids (dietNA), i.e., DNA as well as both coding and non-coding RNAs. In the context of food chemistry and nutrition, dietNA are nowadays vastly neglected. In consequence, there are no dedicated methodologies to characterize...
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UV-Vis measurements and SEM images of Ag nanostructures
Open Research DataUv-vis and SEM of Ag nanostructures. Structures were obtained by dewetting thin films. Various fabrication conditions i.e. temperature, time of the annealing and thickness of the initial layer were subsequently changed.
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Plasma profile and urine excretion of amino acids in children with celiac disease on gluten-free diet after oligofructose-enriched inulin intervention: results of a randomised placebo-controlled pilot study
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Seminarium dyplomowe MS 5
e-Learning CoursesSeminarium dyplomowe, Matematyka Stosowana, grupa 5, semestr VI
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Identification of L. monocytogenes and atypical isolates by MALDI TOF MS.
Open Research DataThe data represent the results of research within the scientific activity Miniatura 5 entitled "Characterization of atypical Listeria monocytogenes strains isolated from the food production environment financed by the National Science Center (no. DEC 2021/05/X/NZ9/00143). The aim of this part of the project was (i) to determine the peptide composition...
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Weronika Hewelt-Belka dr hab. inż.
PeopleI am specializing in analytical chemistry with a primary focus on lipidomics and metabolomics. My research centers on the development and application of cutting-edge analytical techniques, particularly high-performance liquid chromatography coupled with mass spectrometry (LC-MS), to explore complex biological matrices and deepen our understanding of human metabolism and health. A significant part of my work is dedicated to studying...
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TiO2 /SrTiO3 and SrTiO3 microspheres decorated with Rh, Ru or Pt nanoparticles: Highly UV–vis responsible photoactivity and mechanism
PublicationA series of TiO2/SrTiO3 and SrTiO3 microspheres decorated by Rh, Ru or Pt NPs were prepared by facile hydrothermal method. The as-prepared samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM) with energy-dispersive Xray (EDX) spectroscopy, scanning electron microscopy (SEM), photoluminescence spectrometry (PL), Fourier transform infrared (FT-IR) and...
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UV/VIS Spectroscopy of titanium dioxide coated nickel foams
Open Research DataThe data includes UV-Vis spectra of titanium dioxide coated nickel foams heated at 400, 500 and 600 C in Ar. Jasco V-650 Spectrophotometer was used and Spectra Measurement software.
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Rapid and simple multi-analyte LC–MS/MS method for the determination of benzodiazepines and Z-hypnotic drugs in blood samples: Development, validation and application based on three years of toxicological analyses
PublicationBenzodiazepines (BZDs) and Z-drugs have been particularly important treatments for sleeping and anxiety disorders for many years. However, recently, a number of new benzodiazepines (named designer benzodiazepines, DBZDs) were synthesised, but some of them have never been used in the clinic; they reached the black drug market as new psychoactive substances and are used for recreational purposes. The abuse of these substances has...
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Development and validation of GC–MS/MS method useful in diagnosing intestinal dysbiosis
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Otrzymywanie nowych fotokatalizatorów o podwyższonej aktywności w świetle UV oraz VIS
PublicationGłównym celem naukowym pracy było opracowanie nowych metod otrzymywania fotokatalizatorów oraz lepszy zrozumienie mechanizmu ich działania poprzez korelację właściwości powierzchniowych z ich aktywnością fotokatalityczną. Prace badawcze obejmowały preparatykę TiO2 domieszkowanego borem, wolframem i modyfikowanego klastrami metali. Dla otrzymanych nanokompozytów B/TiO2, W/TiO2, Ag/TiO2, Au/TiO2, oraz Pt-TiO2, zbadano aktywność fotokatalityczną...
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Rapid Evaluation of Poultry Meat Shelf Life Using PTR-MS
PublicationThe use of proton transfer reaction mass spectrometry (PTR-MS) for freshness classification of chicken and turkey meat samples was investigated. A number of volatile organic compounds (VOCs) were selected based on the correlation (> 95%) of their concentration during storage at 4 °C over a period of 5 days with the results of the microbial analysis. In order to verify if the selected compounds are not sample-specific, a number...
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Problems of PAH quantification by GC-MS method using isotope-labelled standards.
PublicationChromatografia gazowa w połączeniu ze spektromerią mas (GC-MS) jest obecnie rutynowo stosowaną metodą w analityce środowiskowej do oznaczania śladowych ilości zanieczyszczeń organicznych. Stosowanie detektora mas sprawia, że wygodnym wzorcem wewnętrznym są stabilne izotopowo analogi oznaczanych związków. Związki te są wykorzystywane do śledzenia i kompensacji strat analitów podczas wykonywania określonych operacji związanych z...
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Profile and Content of Phenolic Compounds in Leaves, Flowers, Roots, and Stalks of Sanguisorba officinalis L. Determined with the LC-DAD-ESI-QTOF-MS/MS Analysis and Their In Vitro Antioxidant, Antidiabetic, Antiproliferative Potency
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UV-Vis-DR-TiO2 heated at 400-600oC in Ar or H2
Open Research DataThese data contain UV-Vis/DR spectra of TiO2 heated at 400-600oC in Ar or H2. Transformation of spectra to Kubelka-Munk function was performed together with determination of band gap.
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The profiles and spectrum of aqua solution of tannic acid by HPLC-DAD-MS analysis.
Open Research DataThe profiling of tannic acid is determined by examining the content and proportion / ratio of gallotannins [Aras et al. 2016, Clifford et al. 2007, Gauri et al. 2012, Nishizawa et al. 1982]. In order to check the ion mass distribution (TIC) in an aqueous solution of commercial tannic acid, a direct sample injection (TA) was performed into the mass spectrometer....
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Preparation of Internal Standards for 2D-UPLC-MS/MS Quantification of Noncanonical DNA Bases
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Robust HPLC–MS/MS method for levofloxacin and ciprofloxacin determination in human prostate tissue
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Development and Validation of SPE-HPLC-MS/MS Method for Determining Cyclophosphamide in Surface Waters
PublicationA rapid and selective method for trace amounts determination of cyclophosphamide in surface water samples has been developed. A solid phase extraction SPE method for extraction and clean-up procedure has been optimized for determination by reversed-phase high-performance liquid chromatography with tandem mass spectrometry. The analyses proceed in the positive ion mode by means of the electrospray ionization method (ESI). Clean...
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Discrimination of Apple Liqueurs (Nalewka) Using a Voltammetric Electronic Tongue, UV-Vis and Raman Spectroscopy
PublicationThe capability of a phthalocyanine-based voltammetric electronic tongue to analyze strong alcoholic beverages has been evaluated and compared with the performance of spectroscopic techniques coupled to chemometrics. Nalewka Polish liqueurs prepared from five apple varieties have been used as a model of strong liqueurs. Principal Component Analysis has demonstrated that the best discrimination between liqueurs prepared from different...
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Revealing dynamic changes of the volatile profile of food samples using PTR–MS
PublicationVolatile compounds carry valuable information regarding the properties of foodstuffs. Volatiles emitted from food can be used as, for example, indicators of quality, shelf-life, or authenticity. A better understanding of the multitude of transformations which occur during food processing could facilitate the optimisation of production, increase the desirability of food products, and also their wholesomeness. However, as some of...
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Elucidation of transformation pathway of ketoprofen, ibuprofen, and furosemide in surface water and their occurrence in the aqueous environment using UHPLC-QTOF-MS
PublicationThe identification and determination of transformation products (TPs) of pharmaceuticals is essential nowadays, in order to track their fate in the aqueous environment and, thus, to estimate the actual pollution. However, this is a challenging task due to the necessity to apply high-resolution instruments enable to detect known and unknown compounds. This work presents the use of liquid chromatography quadrupole time-of-flight...
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A novel methodology for the enantiomeric resolution of methamphetamine, its precursors and intermediates by GC-MS
PublicationImpurity profiling and classification of abused drugs using chiral analytical techniques is of particular interest and importance because of the additional information obtained from this approach. When these methods are applied to the synthesis of illicitly used substances, they can supply valuable information about the conditions/chemicals used in the synthesis. In this study, simultaneous chiral separation of methylamphetamine,...
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Health risks from consumption of medicinal plant dietary supplements
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Metabolic Evaluation of Urine from Patients Diagnosed with High Grade (HG) Bladder Cancer by SPME-LC-MS Method
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Non-volatile molecular composition and discrimination of single grape white of chardonnay, riesling, sauvignon blanc and silvaner using untargeted GC–MS analysis
PublicationThis study developed and applied a GC–MS method aiming at molecular fingerprinting of 120 commercial single grape white wines (Chardonnay, Riesling, Sauvignon Blanc and Silvaner) for possible authentication according to grape variety. The method allowed detection of 372 peaks and tentative identification of 146 metabolites including alcohols, organic acids, esters, amino acids and sugars. The grape variety effect explained 8.3%...
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Lanthanide-organic-frameworks modified ZnIn2S4 for boosting hydrogen generation under UV–Vis and visible light
PublicationNovel Ln-MOF with microrods shape were successfully combined with ZnIn2S4 (ZIS) microsphere and used for photocatalytic hydrogen generation under UV–Vis and visible light. The Ln-MOFs/ZIS system comprises lanthanide-carboxylate coordination networks (Tm and Gd as metal ions, and 1,3,5-benzenetricarboxylic acid (BTC) as the organic linker) deposited on ZnIn2S4 microspheres. Effect of the amount of ((Tm,Gd)-BTC) (1, 5, 10 wt%) on...
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Prophylaxis of Non-communicable Diseases: Why Fruits and Vegetables may be Better Chemopreventive Agents than Dietary Supplements Based on Isolated Phytochemicals?
PublicationThe World Health Organization (WHO) report from 2014 documented that non-communicable socalled civilization diseases such as cardiovascular disease, chronic respiratory diseases, cancer or type 2 diabetes are responsible for over 50% of all premature deaths in the world. Research carried out over the past 20 years has provided data suggesting that diet is an essential factor influencing the risk of development of these diseases....
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Agregacja amfoterycyny B i wybranych pochodnych - chemometryczna analiza widm UV-Vis
PublicationPrezentowane badania miały na celu poznanie procesu agregacji nowej generacji pochodnych polienowego antybiotyku przeciwgrzybowego - amfoterycyny B. Przebieg procesu agregacji w roztworach wodnych o różnym składzie monitorowano przy pomocy absorpcyjnej spektroskopii UV-Vis. Otrzymane zestawy widm analizowano z zastosowaniem zaawansowanych technik chemometrycznych (PCA, NSD), co pozwoliło na określenie liczby, typu i ilości form...
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Mosty tymczasowe typu BAILEY - MS 22-80 w świetle badań in SITU
PublicationW pracy przedstawiono i omówiono zakres badań, wybrane modele obliczeniowe, wyniki analiz teoretycznych i badań odbiorowych (próbnych obciążeń o rozszerzonym zakresie), oraz spostrzeżenia dotyczące zachowania się konstrukcji na przykładzie kilku badanych obiektów mostów tymczasowych typu bailey - MS 22-80.