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Małgorzata Wisniewska,Stanisław Chibowski,Teresa Urban 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.1
The effect of solution pH and molecular weight of polyethylene glycol (PEG) and polyethylene oxide (PEO) on their adsorption as well as stability of the colloidal Al2O3 water suspension was studied. The following methods were applied: turbidimetry, spectrophotometry, viscosimetry, potentiometric titration and microelectrophoresis. It was shown that the increasing solution pH affects conformation of the adsorbed macromolecules which affects the stability properties of such systems. The polymer adsorption causes deterioration of the stability conditions of the investigated alumina systems in comparison to those without polymer at all investigated pH values. At pH 3 and 6 the effect of the suspension destabilization is significantly smaller than at pH 9. The most effective flocculent of Al2O3 water suspension is PEO of the molecular weight 218,000 at pH 9.
Małgorzata Wisniewska,Stanisław Chibowski,Teresa Urban 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
The effects of solution pH and degree of polymer hydrolysis on the adsorption mechanism of anionicpolyacrylamide (PAM) on the alumina surface were investigated. The spectrophotometry, potentiometrictitration, microelectrophoresis and thermogravimetry were applied to determine polymer adsorbedamount, surface charge density and zeta potential of solid particles in the presence and absence of PVA,as well as thermal characteristics of Al2O3 surface with the adsorbed polymer, respectively. The obtainedresults indicate that adsorption of PAM decreases with the increasing pH. Additionally, the polymeradsorption level depends on its degree of hydrolysis (which is equivalent to the content of carboxylgroups).
Identification of Proteomic Components Associated with Resistance to Fusarium Head Blight in Rye
Perlikowski, Dawid,Wisniewska, Halina,Goral, Tomasz,Ochodzki, Piotr,Majka, Maciej,Pawlowicz, Izabela,Belter, Jolanta,Kosmala, Arkadiusz The Korean Society of Plant Pathology 2019 Plant Pathology Journal Vol.35 No.4
Rye was used here to dissect molecular mechanisms of resistance to Fusarium head blight (FHB) and to go deeper with our understanding of that process in cereals. F. culmorum-damaged kernels of two lines different in their potential of resistance to FHB were analyzed using two-dimensional gel electrophoresis and mass spectrometry to identify resistance markers. The proteome profiling was accompanied by measurements of ${\alpha}-$ and ${\beta}-amylase$ activities and mycotoxin content. The proteomic studies indicated a total of 18 spots with clear differences in protein abundance between the more resistant and more susceptible rye lines after infection. Eight proteins were involved in carbohydrate metabolism of which six proteins showed a significantly higher abundance in the resistant line. The other proteins recognized here were involved in stress response and redox homeostasis. Three remaining proteins were associated with protease inhibition/resistance and lignin biosynthesis, revealing higher accumulation levels in the susceptible rye line. After inoculation, the activities of ${\alpha}-$ and ${\beta}-amylases$, higher in the susceptible line, were probably responsible for a higher level of starch decomposition after infection and a higher susceptibility to FHB. The presented results could be a good reference for further research to improve crop resistance to FHB.
Katarzyna Szewczuk-Karpisz,Małgorzata Wisniewska,Małgorzata Pac-Sosin´ ska,Adam Choma,Iwona Komaniecka 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.35 No.-
This paper describes the electrokinetic, adsorption and stability properties of the silica–exopolysac-charide Sinorhizobium meliloti (EPS). Exopolysaccharide adsorbs on the silica surface in the whole pHrange, but the adsorption amount increases with the pH growth (at pH 9 approx. 0.8 mg/m2). The EPSadsorption affects the electrokinetic and stability properties of the system. At low pH values (3 and 4.6)the increase in the system stability occurs (electrosteric interactions), whereas at higher (7.6 and 9) thelight system destabilization was noted (formation of a single polymer bridges between particles).
Relationships between Genetic Diversity and Fusarium Toxin Profiles of Winter Wheat Cultivars
Goral, Tomasz,Stuper-Szablewska, Kinga,Busko, Maciej,Boczkowska, Maja,Walentyn-Goral, Dorota,Wisniewska, Halina,Perkowski, Juliusz The Korean Society of Plant Pathology 2015 Plant Pathology Journal Vol.31 No.3
Fusarium head blight is one of the most important and most common diseases of winter wheat. In order to better understanding this disease and to assess the correlations between different factors, 30 cultivars of this cereal were evaluated in a two-year period. Fusarium head blight resistance was evaluated and the concentration of trichothecene mycotoxins was analysed. Grain samples originated from plants inoculated with Fusarium culmorum and naturally infected with Fusarium species. The genetic distance between the tested cultivars was determined and data were analysed using multivariate data analysis methods. Genetic dissimilarity of wheat cultivars ranged between 0.06 and 0.78. They were grouped into three distinct groups after cluster analysis of genetic distance. Wheat cultivars differed in resistance to spike and kernel infection and in resistance to spread of Fusarium within a spike (type II). Only B trichothecenes (deoxynivalenol, 3-acetyldeoxynivalenol and nivalenol) produced by F. culmorum in grain samples from inoculated plots were present. In control samples trichothecenes of groups A (H-2 toxin, T-2 toxin, T-2 tetraol, T-2 triol, scirpentriol, diacetoxyscirpenol) and B were detected. On the basis of Fusarium head blight assessment and analysis of trichothecene concentration in the grain relationships between morphological characters, Fusarium head blight resistance and mycotoxins in grain of wheat cultivars were examined. The results were used to create of matrices of distance between cultivars - for trichothecene concentration in inoculated and naturally infected grain as well as for FHB resistance Correlations between genetic distance versus resistance/mycotoxin profiles were calculated using the Mantel test. A highly significant correlation between genetic distance and mycotoxin distance was found for the samples inoculated with Fusarium culmorum. Significant but weak relationships were found between genetic distance matrix and FHB resistance or trichothecene concentration in naturally infected grain matrices.