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Wyświetlanie 1-2 z 2
Tytuł:
Biodegradacja związków fosfonowych przez grzyby
Biodegradation of phosphonates by fungi
Autorzy:
Wieczorek, Dorota
Lipok, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/172438.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
związki fosfonowe
biotransformacja
biodegradacja
grzyby
phosphonates
biotransformation
biodegradation
fungi
Opis:
Phosphonates are the group of organophosphorus compounds, which are characterized by the presence of covalent bond(s) between carbon and phosphorus atom in their structure. Both; the natural and synthetic phosphonic compounds, are encountered in various ecosystems, however because of their wide range of applications, the latter ones are considerably more frequently discussed. Regarding the broad spectrum of biological activity, capability to chelate metal cations and environmental stability of direct carbon to phosphorus bond under physiological conditions, phosphonic compounds found a variety of applications e.g. as pesticides, drugs, anticorrosive agents, additives to surfactants and flame resistant (partially)polymers. Such massive use of phosphonates, together with mentioned environmental stability of those compounds, results in their common presence as xenobiotic environmental pollutants. Scientific efforts dedicated to recognising the fate and biodegradation of phosphonic compounds in the environment had begun in 80’s last century. Currently it is known that many microorganisms, mainly bacteria, but also fungi, are able to decompose the C-P bond. Interestingly however, the number of known species of fungi that are able to biodegrade and/or to bio-transform the phosphonates, is relatively low. It seems to be surprising, because especially the fungi are known from their impressive skills to adaptation to various nutritional conditions. Such a thesis may be supported by the fact that the process of biodegradation of phosphonates may occur via several pathways. Enzymes which are known to catalyse this process are phosphonoacetaldehyde hydrolase, phosphonoacetate hydrolase, phosphonopyruvate hydrolase and C-P lyase complex. This article briefly presents the issue of degradation pathways of phosphonates, and the role of phosphonate- degrading fungi.
Źródło:
Wiadomości Chemiczne; 2020, 74, 1-2; 33-55
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oznaczanie związków fosforu w matrycach roślinnych
Determination of phosphorus compounds in plant tissues
Autorzy:
Żyszka-Haberecht, Beata
Wieczorek, Dorota
Lipok, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/1413210.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Chemiczne
Tematy:
fosfor
tkanki roślinne
oznaczanie
metody analityczne
NMR
phosphorus
plant tissues
determination
analytical methods
Opis:
The variety of the chemical forms of phosphorus compounds occurring in plant tissues, accompanied by the complexity of the chemical composition of plants as the analytical matrices, are the reasons why there is no one, the best answer, how those individual substances may be determined qualitatively and quantitatively. Interestingly, if the subject of determination is the total phosphorus content, the spectrum of effective methods and techniques seems to be impressive. However, in case of spectrophotometric measurements and classical variants of absorption (FAAS) or emission (ICP-AES/ ICP-OES) spectrometry techniques, it is necessary at first to isolate various phosphorus forms from the matrix, and then to mineralize them prior determination. The development of combined methods e.g. ETV-ICP- AES or HR-ETAAS, does allow the isolation of the phosphorus analyte and its detection in a kind of “one step” analytical procedure, directly in plant tissues. Similar benefits, while maintaining the sensitivity of determinations, are brought by the use of XRF, SIMS or nanoSIMS - more expensive techniques of imaging the presence of phosphorus in biological matrices. In turn, the application of nuclear magnetic resonance spectroscopy, especially the 31P NMR technique is thought to be the most universal approach. Using this technique and being aware of higher limit of detection, it is possible to determine various plant phosphorus compounds qualitatively and quantitatively, at the same time.
Źródło:
Wiadomości Chemiczne; 2021, 75, 7-8; 1017-1038
0043-5104
2300-0295
Pojawia się w:
Wiadomości Chemiczne
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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