Temat: carboxylic acids - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Effects of carboxylic acid addition on the setting time and compressive strength of glass-ionomer cements
Autorzy:: Biernat, M.
Ciołek, L.
Jaegermann, Z.
Pęczkowski, P.
Powiązania:: https://bibliotekanauki.pl/articles/285854.pdf
Data publikacji:: 2016
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:: glass-ionomer cements
carboxylic acids
components
Źródło:: Engineering of Biomaterials; 2016, 19, 138; 60
1429-7248
Pojawia się w:: Engineering of Biomaterials
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Chemical characterization of bulk depositions in two cities of Upper Silesia (Zabrze, Bytom), Poland : Case study
Autorzy:: Michalski, Rajmund
Pecyna-Utylska, Paulina
Powiązania:: https://bibliotekanauki.pl/articles/2203100.pdf
Data publikacji:: 2022
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: metals
Upper Silesia
ions
metalloids
bulk deposition
carboxylic acids
Opis:: The chemical composition of bulk deposition is an important aspect of assessing ambient air pollution. It contributes significantly to the removal of pollutants from the atmosphere and their transfer to other ecosystems. Thus, it is a reliable determinant of environmental chemistry. Therefore, bulk deposition can be considered useful for tracking the migration path of substances from different sources. The aim of the study carried out at five measurement points in Zabrze and Bytom was to assess the content of selected physico-chemical parameters in bulk deposition. Samples were collected continuously from November 2019 to November 2020. In the collected samples the following were determined: COD, pH, conductivity, dissolved organic carbon, inorganic carbon and total carbon; inorganic anions (Cl-, SO42-, NO3-, NO2-, Br-, PO43-) and cations (Li+, Mg2+, Ca2+, Na+, K+, NH4+), metals and metalloids (Mn, Ni, Co, Cu, Zn, As, Cd, Pb, Cr, and Fe), and carboxylic acids (formic, acetic, oxalic). The obtained test results were statistically processed using Excel, and the normality of data distribution was verified by Shapiro-Wilk test. The results show that pollutants transported in the atmosphere and introduced with precipitation in the Zabrze and Bytom areas are a significant source of area pollution of the region.
Źródło:: Archives of Environmental Protection; 2022, 48, 2; 106--116
2083-4772
2083-4810
Pojawia się w:: Archives of Environmental Protection
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Liquid chromatographic techniques in separation of betacyanins and their derivatives from red beet roots
Autorzy:: Spórna, A.
Stalica, P.
Jerz, G.
Szaleniec, M.
Wybraniec, S.
Powiązania:: https://bibliotekanauki.pl/articles/115819.pdf
Data publikacji:: 2010
Wydawca:: Fundacja na Rzecz Młodych Naukowców
Tematy:: betanin
betalains
betacyanins
ion-pair counter-current chromatography
perfluorinated carboxylic acids
Opis:: A study on separation of betacyanins and their decarboxylated as well as dehydrogenated derivatives obtained from red beet roots (Beta vulgaris L.) in high pressure liquid chromatography (HPLC) and ion-pair high-speed counter-current chromatography (IP-HSCCC) was performed. The IP-HSCCC process was accomplished in the ‘head-to-tail’ mode in a solvent system composed of butanol — acetonitrile — water (5:1:6 v/v/v, acidifi ed with 0.7% trifl uoroacetic acid). The HPLC separation was performed in a typical reversed phase mode with mass spectrometry (ESI-MS) and diode-array (DAD) detection. The chromatographic profi les of betalains obtained in these two techniques were signifi cantly diff erent. In HPLC, the most polar compounds, like betanin and isobetanin, eluted before less polar decarboxylated and dehydrogenated derivatives (mostly degradation products of betanin). In IP-HSCCC, the dehydrogenated derivatives were eluted faster then their non-dehydrogenated analogues. It was observed for the fi rst time that betanin and neobetanin (14,15-dehydrogenated betanin), which are present in many plants containing betalains, had reversed elution orders during chromatographic separation by these two techniques.
Źródło:: Challenges of Modern Technology; 2010, 1, 1; 19-22
2082-2863
2353-4419
Pojawia się w:: Challenges of Modern Technology
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Induction of the multixenobiotic/multidrug resistance system in various cell lines in response to perfluorinated carboxylic acids
Autorzy:: Rusiecka, Izabela
Składanowski, Andrzej
Powiązania:: https://bibliotekanauki.pl/articles/1040751.pdf
Data publikacji:: 2008
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: multixenobiotic resistance
multidrug resistance
perfluorinated carboxylic acids
flow cytometry
ABCB1
ABCC1
Opis:: The multixenobiotic resistance (closely related to multidrug resistance) system controls transport across the plasma membrane as a defense against toxic molecules. Multixenobiotic resistance system consists of an efflux pump, ABCB1 (also named P-glycoprotein, P-gp), and/or a molecule of the ABCC family (also named multiple resistance associated protein, MRP). ABCB1 is able to increase efflux of many low-molecular foreign molecules. Measuring system induction may be used as a biomarker of cell/organism exposure to foreign substances. Various established cell lines were tested for constitutive and induced multixenobiotic resistance proteins by Western blotting immunodetection. The pumping function was indirectly assayed with Rhodamine B by visualization of cell fluorescence in the presence of verapamil. Changes in ABC proteins were measured by flow cytometry after exposition to various perfluorinated carboxylic acids. MCF7 and HeLa cells were found to contain the highest constitutive level of both ABCB1 and ABCC1. HEK293 exhibited much less ABCB1 and no activity of pumping out Rhodamine B. The pumping activity was found to be related to the amount of the cell-type specific 170 kDa ABCB1 protein. An 8-day exposure to 10-4 M perfluorononanoic acid resulted in about 2-2.5-fold increase of ABCB1 level. That was confirmed also for short times by flow cytometry of cells exposed to perfluorinated acids and its natural congeners. Both ABCB1- and ABCC1-related fluorescence increased along with the carbon chain in acids from C6 up to C9 and decreased for C10. Measuring of multixenobiotic resistance changes in vitro induced by chemicals may be a convenient test for screening for their potential toxicity.
Źródło:: Acta Biochimica Polonica; 2008, 55, 2; 329-337
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Novel side reactions accompanying activation and aminolysis of N-benzoyl-2-alkylserines.
Autorzy:: Kamiński, Zbigniew
Woszczyna, Agnieszka
Kolesińska, Beata
Redliński, Adam
Powiązania:: https://bibliotekanauki.pl/articles/1044075.pdf
Data publikacji:: 2001
Wydawca:: Polskie Towarzystwo Biochemiczne
Tematy:: side-reaction
4-alkyl-2-phenyl-4,5-dihydro-1,3-oxazole-5 carboxylic acids
2-alkylserines
Opis:: 2-Phenyl-4-alkyl-4-hydroxymethyl-1,3-oxazolones (2a-d) have been identified as side products accompanying activation of N-benzoyl-2-alkylserines (1a-d). Oxazolones 2a-d in the presence of amine rearrange subsequently to corresponding 4-alkyl-2-phenyl-4,5-dihydro-1,3-oxazole-5 carboxylic acids (4a-d) at a 20-68% yield.
Źródło:: Acta Biochimica Polonica; 2001, 48, 4; 1175-1178
0001-527X
Pojawia się w:: Acta Biochimica Polonica
Dostawca treści:: Biblioteka Nauki

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