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51.
Sylwia Cyboran-Mikoajczyk Przemysaw Sareo Robert Pasawski Urszula Pasawska Magdalena Przybyo Kacper Nowak Micha Pciennik Halina Podbielska Marta Kopaczyska Magdalena Wawrzyska 《International journal of molecular sciences》2021,22(4)
Liposomal technologies are used in order to improve the effectiveness of current therapies or to reduce their negative side effects. However, the liposome–erythrocyte interaction during the intravenous administration of liposomal drug formulations may result in changes within the red blood cells (RBCs). In this study, it was shown that phosphatidylcholine-composed liposomal formulations of Photolon, used as a drug model, significantly influences the transmembrane potential, stiffness, as well as the shape of RBCs. These changes caused decreasing the number of stomatocytes and irregular shapes proportion within the cells exposed to liposomes. Thus, the reduction of anisocytosis was observed. Therefore, some nanodrugs in phosphatidylcholine liposomal formulation may have a beneficial effect on the survival time of erythrocytes. 相似文献
52.
The removal of humic acids and phenol from model solution by coagulation and adsorption on powdered activated carbon (PAC) was investigated. A PAX XL-69 polyaluminum chloride was applied as a coagulant. The adsorption of humic acids and phenol on activated carbon for single- and bi- component solutions was studied. It was found that coagulation without PAC addition was less effective than the adsorption-coagulation integrated system. Coagulation enhanced with adsorption on activated carbon was more effective when coagulation was preceded by adsorption than when the two processes were carried out simultaneously. The best results were obtained at pH 7. Phenol and color were removed pletely, UV254 absorbance was reduced by about 99% and COD-Mn was reduced by 81-89%. 相似文献
53.
ABSTRACT Studies of gold(III) ions sorption from hydrochloric acid solutions on 2,2‘-thiobisethanol dimethacrylate/ethylene glycol dimethacrylate copolymer were performed. The correlation between the concentration of HCl (0.0001–4 M) and sorption efficiency (370–140 mg g?1) was observed. The kinetics of sorption and the parameters of Langmuir and Freundlich isotherms for the studied systems were determined. The use of 0.8 M thiourea in 3 M HCl as eluent assured the high recovery degree of sorbed ions. It can, therefore, be concluded that newly synthesized sulfur-containing sorbent can be used in the recovery and concentration of gold(III) ions. 相似文献
54.
55.
Sylwia Mildner‐Szkudlarz Renata Zawirska‐Wojtasiak Michał Gośliński 《International Journal of Food Science & Technology》2010,45(11):2272-2280
The effects of extraction parameters on bioactive compound contents of winemaking waste extracts (WWE) and its effect on rapeseed oil oxidative stability were evaluated. Research showed that the total phenols and anthocyanin contents and antioxidant activity (AA) of WWE significantly depended on the extraction parameters. Increasing the temperature (60 °C) and time (5 h) of extraction and an addition of water to ethanol statistically improved the rate of active component extraction. HPLC analysis showed that procyanidin B2, catechin, gallic acid, γ‐resorcylic acid and p‐coumaric acid were the major phenolic compounds of WWE. Important correlations between total phenolic compounds quantified by HPLC and both DPPH and (ferric reducing antioxidant power) (FRAP) values were found. WWE added to the oil at three different levels clearly slowed down the process of fatty acid oxidation, inhibiting hydroperoxide formation by about 86%, comparable with BHT, while it was more effective than that of α‐tocopherol. When using volatile compound formation as a marker of lipid oxidation, WWE at the level of 2000 ppm were the most effective inhibitors of the decomposition of hydroperoxides. The research showed that the WWE are a rich source of phenolic compounds with powerful antioxidant activities and are suitable for preventing rapeseed oil oxidation. 相似文献
56.
Sylwia Dworakowska Cdric Le Coz Guillaume Chollet Etienne Grau Henri Cramail 《European Journal of Lipid Science and Technology》2019,121(11)
This study aims at obtaining cross‐linked polymeric materials of biomass origin. For this purpose, one‐pot polyesterification of methyl ricinoleate and methyl 12‐hydroxystearate using titanium isopropoxide as a catalyst is performed leading to polyesters known as estolides. The obtained estolides are successfully cross‐linked using dicumyl peroxide or a sulfur vulcanization system. The so‐formed bio‐based elastomers appear to exhibit promising properties. The latter are analyzed by mechanical tensile tests and thermal techniques (TGA, DSC, DMA) and show high thermal stability (T5% = 205–318 °C), tailored physico‐mechanical properties (low glass transition temperature in the range from ?69 to ?54 °C), and good tensile strength (0.11–0.40 MPa). Networks prepared from high molecular weight estolides appear to be promising bio‐based elastomers. Practical Applications: The vegetable oil‐based estolides described in this contribution are new fully bio‐based precursors for further elastomers synthesis. The resulting estolide networks (obtained by peroxide or sulfur cross‐linking) exhibit tailored thermo‐mechanical properties. 相似文献
57.
Halina Kaczmarek Marek Nowicki Irena Vuković-Kwiatkowska Sylwia Nowakowska 《Journal of Polymer Research》2013,20(3):1-12
The blends based on poly(lactic acid), (PLA) and polyacrylates (1:1 weight ratio) have been prepared by photopolymerization of three different multifunctional acrylate monomers (pentaerythritol triacrylate, pentaerythritol tetraacrylate and dipentaerythritol pentaacrylate) in matrix of linear PLA. The structure of these systems has been studied by Atomic Force Microscopy (AFM), Differential Scanning Calorimetry (DSC) and X-ray Diffraction (XRD). It was found that the blends are highly crosslinked, rough, heterogeneous and some of them – semicrystalline. The effect of UV-irradiation on surface morphology of obtained mixtures was studied. The viscometry has been applied for measurements of changes of PLA molecular weight resulting of photodegradation. It was shown that blends are much more photostable than pure PLA. 相似文献
58.
Krzysztof R. Idzik Przemyslaw Ledwon Sylwia Golba Mieczyslaw Lapkowski 《Electrochimica acta》2010,55(24):7419-7426
We present electrochemical and spectral properties of symmetric monomers 1,3,5-tris(aryl)benzenes and 2,4,6-tris(aryl)-1-phenols and their polymers. These compounds contain thienyl, furyl or EDOT moieties attached to central benzene or phenol ring at the meta-position, synthesized by a Stille cross-coupling procedure. All monomers are electroactive and undergo electropolymerization creating thin films on an electrode surface. Polymers with meta-linkages were obtained by electrochemical oxidation. Detailed cyclic voltammetry and in situ UV-vis spectroelectrochemistry show that polymers with hydroxy groups exhibit higher conductivity and better stability than with benzene core. Interesting and different behavior occurs for 2,4,6-tris(2-thienyl)-1-phenol, for which the characteristic, sharp, redox peak is observed. 相似文献
59.
Eiki Ito Ikuyoshi Kouchi Sylwia Mozia Masaharu Okuda Takashi Nakano Masahiro Toyoda Michio Inagaki 《新型炭材料》2007,22(3):199-205
柏木条经过热蒸气处理,成功地制备了纳米孔炭,无需另行活化,比表面积就可达1000m^2/g以上。如果在800℃~870℃炭化,柏木炭外表面积可达400m^2/g以上,与同样温度在氩气中炭化得到的柏木炭相比,后者微孔面积仅为30m^2/g~40m^2/g。在900℃以上炭化得到的柏木炭,微孔表面积高达800m^2/g以上,外表面积约为150m^2/g。柏木炭的孔结构可以通过调节过热蒸气的温度得到控制。 相似文献
60.
Luis Guerrero Anna Claret Wim Verbeke Geraldine Enderli Sylwia Zakowska-Biemans Filiep Vanhonacker Sylvie Issanchou Marta Sajdakowska Britt Signe Granli Luisa Scalvedi Michele Contel Margrethe Hersleth 《Food quality and preference》2010,21(2):225-233
A total of 721 consumers were interviewed in order to obtain and compare consumer-driven associations to the word “Traditional”, in a food context, in six European regions. Participants, who were individually interviewed, had to state the first words that came into their mind when the word “Traditional” was verbally presented. Frequencies of occurrence of associations were obtained and analysed by means of simple correspondence analysis. The different word associations obtained were classified in 55 classes and then grouped in ten principal dimensions by triangulation. In general, southern European regions tended to associate the concept of “Traditional” more frequently with broad concepts such as heritage, culture or history. Central and Nordic European regions tended to focus mainly on practical issues such as convenience, health or appropriateness. As a final outcome of the analyses, a consensus conceptual map of traditional food products was obtained. The empirical findings of this qualitative exploratory free word association test provide valuable insights for product positioning, innovation and new developments in the traditional food market. 相似文献