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    Wyświetlanie 1-7 z 7
    Tytuł:
    Dissipation of methomyl residues in tomato fruits, soil and water using LC-MS/MS
    Autorzy:
    El-Hefny, D.
    Abdallah, I.
    Helmy, R.
    Mahmoud, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/2084623.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    dissipation
    LC-MS/MS
    methomyl
    tomato
    QuEChERS
    Opis:
    Tomato is an economically important vegetable crop which is attacked heavily by insect pests leading to reduction of yield and quality of the fruits. Field experiments were carried out to investigate the dissipation of methomyl (a common insecticide) used mainly on tomato fruits. LC-MS/MS coupled with the QuEChERS method were used for the determination of methomyl. The results showed that the recovery using matrix-matched standards ranged from 87.8 to 101.3%, with relative standard deviation of 2.5 to 7.5%. Kinetics equation, Log R = log R0 – 0.434 Kt, was used to calculate the rate of degradation in tomato, soil and water. Residue half-life calculated using kinetic rate ranged from 1.95 to 1.63 days in tomato and soil, respectively. From the results it was concluded that tomato fruits can be safely harvested for consumption after 15 days of application based on estimated preharvest interval (PHI). It is advisable to re-estimate the PHI regularly owing to data from the EU and Codex.
    Źródło:
    Journal of Plant Protection Research; 2019, 59, 3; 355-361
    1427-4345
    Pojawia się w:
    Journal of Plant Protection Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New Rapid Analysis of two Classes of Pesticides in Food Wastewater by Quechers-Liquid Chromatography/Mass Spectrometry
    Autorzy:
    Łozowicka, B.
    Kaczyński, P.
    Szabuńko, J.
    Ignatowicz, K.
    Warentowicz, D.
    Łozowicki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/123585.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    wastewater
    azole
    neonicotinoids
    QuEChERS
    LC-MS/MS
    Opis:
    The rapid analytical method was developed in response to increasing concern over the environmental impact of azoles (sterol biosynthesis inhibitors) and neonicotinoids (nicotinic acetylcholine receptor site). These chemicals are commonly used to protect fruit and vegetables crops against fungi and pests. Seven insecticides and twenty one fungicides commonly occurring in food industrial wastewater have been determined. For this purpose, active substances from two new pesticide classes were extracted and isolated by QuEChERS by addition of acetonitrile, buffering salts and chitin as a clean-up sorbent. The novelty of this procedure was one step sample preparation including extraction and removing of co-extracts in short time. Instrumental analysis was conducted by liquid chromatography coupled with mass spectrometry using multiple reaction monitoring. The limits of detection ranged from 0.002 to 0.005 μg·L-1 with satisfactory accuracy and precision The recoveries for the pesticides ranged from 81–103%, with high repeatability (n = 3, RSD ≤ 9%) and low LOQs (0.01 μg·L-1). Matrix effects calculated were less than 12% for all analyses. The method was applied to routine analysis of food industrial wastewater. Concerning the results, total pesticide levels in most cases were below 1 μg·L -1. The most significant pesticides in terms of concentration and frequency of detection were acetamiprid (0.07 μg· L-1); tebuconazole (1.2 μg· L-1) and thiacloprid (0.04 μg·L-1).
    Źródło:
    Journal of Ecological Engineering; 2016, 17, 3; 97-105
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of Triterpene Saponin Composition of White, Yellow and Red Beetroot (Beta vulgaris L.)
    Autorzy:
    Spórna-Kucab, Aneta
    Tekieli, Anna
    Skalicka-Woźniak, Krystyna
    Grzegorczyk, Agnieszka
    Świergosz, Tomasz
    Wybraniec, Sławomir
    Powiązania:
    https://bibliotekanauki.pl/articles/2051041.pdf
    Data publikacji:
    2022-06-06
    Wydawca:
    Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
    Tematy:
    betavulgarosides
    Beta vulgaris L
    food composition
    LC-MS/MS
    oleanolic acid
    saponins
    Opis:
    Beta vulgaris L. is an important source of bioactive saponins – a group of secondary metabolites – that have spurred a growing interest due to their health-promoting properties. This study aimed to gain information on triterpene saponin profile of the peel and flesh of white, yellow and red beet of six cultivars – Snow Ball, Boldor, Ceryl, Chrobry, Forono and Tytus – harvested in Poland, in the same region. Twenty four saponins with oleanolic acid, hederagenin, akebonoic acid and gypsogenin as aglycons were identified and quantified by liquid chromatography/tandem mass spectrometry (LC-ESI-MS/MS). Among them, betavulgaroside I, II, III and IV were the major compounds, but the quantitative profile of saponins was found to be dependent on beet cultivar and root part, respectively. The highest content of saponins was found in the peel of yellow B. vulgaris Boldor (20812 mg/kg fresh weight, fw), while the lowest saponin content was determined in the flesh of white B. vulgaris Snow Ball (497 mg/kg fw). In addition, the total saponin content in peel and flesh in yellow beet (26054 mg/kg fw) was much higher than the total content in peel and flesh in red beet Tytus (8364 mg/kg fw) and white beet Snow Ball (1204 mg/kg fw). This is the first report on the profile of saponins in white and yellow beets.
    Źródło:
    Polish Journal of Food and Nutrition Sciences; 2022, 72, 2; 159-170
    1230-0322
    2083-6007
    Pojawia się w:
    Polish Journal of Food and Nutrition Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analytical strategies for assessing occupational exposure to antineoplastic drugs in healthcare workplaces
    Autorzy:
    Dugheri, Stefano
    Bonari, Alessandro
    Pompilio, Ilenia
    Boccalon, Pierpaolo
    Tognoni, Daniela
    Cecchi, Michele
    Ughi, Massimo
    Mucci, Nicola
    Arcangeli, Giulio
    Powiązania:
    https://bibliotekanauki.pl/articles/2162575.pdf
    Data publikacji:
    2018-12-18
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    occupational exposure
    LC-MS/MS
    ICP-MS
    urine
    antineoplastic drugs
    wipe test
    Opis:
    Background Cytotoxic antineoplastic drugs (ADs), widely used in treating cancer, are considered hazardous in the workplace and thus require safe handling practices. An analytical protocol for environmental and biological AD monitoring in the healthcare environment has been developed, since Europe lacks clear guidelines and regulations for cytostatic preparation and handling. Material and Methods Liquid chromatography-tandem mass spectrometry (LC-MS/MS) was used for measuring contemporaneously 20 multi-class cytostatic compounds and urinary α-fluoro-β-alanine, whereas platinum was detected by inductively coupled plasma mass spectrometry (ICP-MS). Sampling procedures and analytical conditions were optimized and the assays were validated. Environmental AD monitoring data, collected in 2009–2017, for a total of 3749 wipe tests and 57 720 determinations, was evaluated. Results The proportion of positive samples gradually decreased from 11.7% in 2010 to 1% in 2017, however, 2266 determinations were positive. No urine sample had detectable concentrations of any of the 4 drugs considered (0/398 samples). Conclusions These improvements are so large that the key role played by the new, more stringent rules for preparing and administering ADs is evident. Hence, the analytical method involving multi-element determinations allows for a more thorough and complete investigation into the AD contamination of work environments. Med Pr 2018;69(6):589–604
    Źródło:
    Medycyna Pracy; 2018, 69, 6; 589-604
    0465-5893
    2353-1339
    Pojawia się w:
    Medycyna Pracy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of selected soil parameters on amino acid profile in Stellaria media
    Autorzy:
    M. Dziągwa-Becker, Magdalena
    Kalitowska, Olga
    A. Oleszek, Wiesław
    Powiązania:
    https://bibliotekanauki.pl/articles/2168198.pdf
    Data publikacji:
    2016-12-30
    Wydawca:
    Instytut Uprawy Nawożenia i Gleboznawstwa – Państwowy Instytut Badawczy
    Tematy:
    free amino acids
    LC-MS/MS
    soil organic matter
    soil quality
    common chickweed
    Opis:
    The study investigates the relationship between soilsthat vary for different basic physicochemical parameters (pH,phosphorus and potassium content, granulometric compositionand soil organic matter content) and the free amino acids content of Stellaria media. According to some research, plant aminoacid profile is a good indicator of the condition of the soils onwhich plants are grown. In this experiment, a rapid and sensitiveliquid chromatography coupled with tandem mass spectrometry(LC-MS/MS) method was used for the identification and quantification of nineteen proteinogenic amino acids in Stellaria mediasamples, which is a very common weed found worldwide. Significant linkage was found between the soil parameters and Stellariamedia amino acid content. Garden soil is the most favourable soilfor amino acid content. Glutamine, glutamic and aspartic acid arethe most abundant amino acids in Stellaria media grown on allthree tested soils.
    Źródło:
    Polish Journal of Agronomy; 2016, 27; 32-37
    2081-2787
    Pojawia się w:
    Polish Journal of Agronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Contribution to the Study of Traces of Psychotropic Substances Inside Miniature Vessels and Collared Flasks of the Eneolithic Funnel Beaker culture (FBC) from Poland
    Autorzy:
    Taras, Halina
    Zakościelna, Anna
    Osak, Marcin
    Buszewicz, Grzegorz
    Teresiński, Grzegorz
    Powiązania:
    https://bibliotekanauki.pl/articles/38620704.pdf
    Data publikacji:
    2023
    Wydawca:
    Uniwersytet Rzeszowski. Instytut Archeologii Uniwersytetu Rzeszowskiego. Muzeum Okręgowe w Rzeszowie
    Tematy:
    psychoactive substances
    miniature vessels
    Eneolithic
    SE group of the FBC
    Polska
    GC-MS/MS
    LC-MS/MS
    Opis:
    The text presents the results of laboratory analyses conducted on vegetal intoxicating substances identified on the walls of selected pottery forms discovered at Polish sites attributed to the south-eastern group of the FBC. The samples taken from miniature vessels and collared flasks were examined using the GC-MS/MS method (triple quadrupole) and then the reference method LC-MS/MS (linear ion trap). As a result of the research, psychotropic substances were identified in four samples: papaverine, scopolamine and atropine.  
    Źródło:
    Analecta Archaeologica Ressoviensia; 2023, 18; 97-102
    2084-4409
    Pojawia się w:
    Analecta Archaeologica Ressoviensia
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Technika LC-MS/MS jako metoda oznaczania izoprostanów: krótki przegląd literatury
    LC-MS/MS as a method for the determination of isoprostanes: a brief review
    Autorzy:
    Król, Magdalena B.
    Brzeźnicki, Sławomir
    Powiązania:
    https://bibliotekanauki.pl/articles/2188852.pdf
    Data publikacji:
    2023-05-19
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    markery stresu oksydacyjnego
    izoprostany
    peroksydacja lipidów
    zastosowanie izoprostanów
    LC-MS/MS
    izomery prostaglandyn
    oxidative stress markers
    isoprostanes
    lipid peroxidation
    application of isoprostanes
    prostaglandin isomers
    Opis:
    Izoprostany to duża grupa związków, które budową przypominają prostaglandyny. Powstają jako produkty wolnorodnikowej reakcji utleniania wielonienasyconych kwasów tłuszczowych i występują powszechnie we wszystkich tkankach oraz płynach biologicznych ciała w możliwym do oznaczenia stężeniu. Od 2018 r. oznaczanie izoprostanów techniką wysokosprawnej chromatografii cieczowej lub gazowej sprzężonej ze spektrometrią mas jest uznawane za złoty standard wśród oznaczeń markerów stresu oksydacyjnego w kontekście oksydacyjnych uszkodzeń lipidów. Publikacja jest syntetycznym przeglądem najnowszej literatury dotyczącej wykorzystania izoprostanów jako markera peroksydacji lipidów z użyciem techniki wysokosprawnej chromatografii cieczowej sprzężonej z tandemową spektrometrią mas. Przedstawiono w niej wyniki badań wykorzystujące oznaczanie izoprostanów w pracy klinicystów i wskazano potencjał zastosowania tych oznaczeń do monitoringu osób pracujących w narażeniu na szkodliwe substancje oraz ich przydatność w badaniach dotyczących stylu życia. Med. Pr. 2023;74(2)
    Isoprostanes are a large group of compounds formed as products of free radical oxidation of polyunsaturated fatty acids, which are isomers of prostaglandin. They are present in all body tissues and biological fluids in quantifiable concentrations. Since 2018, the determination of isoprostanes by chromatographic technique with mass spectrometry is the golden standard of the oxidative stress markers determination in relation to oxidative damage to lipids. The publication is a synthetic review of recently published articles on the use of isoprostanes as a marker of lipid peroxidation determined with the liquid chromatography with tandem mass spectrometry technique. It presents the results of research using isoprostanes as a marker in medicine, in monitoring people working in exposure to harmful substances and in lifestyle research. Med Pr. 2023;74(2)
    Źródło:
    Medycyna Pracy; 2023, 74, 2; 119-125
    0465-5893
    2353-1339
    Pojawia się w:
    Medycyna Pracy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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