Alkáli-humát és réztartalmú cellulózalapú lapok felületanalítikai vizsgálata

Kutatásunk során dudari szénből állítottunk elő káliumi-humátot. Kálium-humáttal, valamint réz(liI)-szulfáttal módosított linter cellulóz rostokból készítettünk lapokat. Az előállított lapok felületének elemi összetételét, felületi morfológiáját, CIE Lab színkoordinátáinak változását, felületi pH-ját és felület nedvesíthetőségét vizsgáltuk. Az eredmények alapján a humát jól kötődik a rostok felületéhez, emellett nagymértékben segíti a réz immobilizációját is a rostokon

Evidence for diagnosis of early chronic pancreatitis after three episodes of acute pancreatitis : a cross-sectional multicentre international study with experimental animal model

Chronic pancreatitis (CP) is an end-stage disease with no specific therapy; therefore, an early diagnosis is of crucial importance. In this study, data from 1315 and 318 patients were analysed from acute pancreatitis (AP) and CP registries, respectively. The population from the AP registry was divided into AP (n=983), recurrent AP (RAP, n=270) and CP (n=62) groups. The prevalence of CP in combination with AP, RAP2, RAP3, RAP4 and RAP5+was 0%, 1%, 16%, 50% and 47%, respectively, suggesting that three or more episodes of AP is a strong risk factor for CP. Laboratory, imaging and clinical biomarkers highlighted that patients with RAP3+do not show a significant difference between RAPs and CP. Data from CP registries showed 98% of patients had at least one AP and the average number of episodes was four. We mimicked the human RAPs in a mouse model and found that three or more episodes of AP cause early chronic-like morphological changes in the pancreas. We concluded that three or more attacks of AP with no morphological changes to the pancreas could be considered as early CP (ECP).The new diagnostic criteria for ECP allow the majority of CP patients to be diagnosed earlier. They can be used in hospitals with no additional costs in healthcare.Peer reviewe

The Rise of the Radical Right in Europe and the Case of Hungary: ‘Gypsy crime’ defines national identity?

Katalin Halasz looks at the impact of the profound political, economic and social changes that have swept across Europe. She argues that there is a new wave of racism, xenophobia, anti-Semitism and Islamophobia that has propped up the extreme and radical right on the margins of politics, but also increasingly in the mainstream. She focuses on the worrying implications of the growing escalation in violence against Roma in South and Central-eastern Europe, and the chilling call for a ‘decisive solution to the Roma problem’ in Hungary, which openly embraces anti-Gypsysm.

Support or Public Work? The Potentials and Results of Communal Work in the Region of Northern Hungary

The subject of our article is the examination of 'working chance instead of support' programs. The basic element of the analysis is a questionnaire, which was filled in by the local governments and non-governmental organizations in the region of Northern Hungary. The results are analyzed with statistical methods (correlation, regression analysis etc.). The main goal is to get significant information, appraise the experiences of 'The Way to Work' Program, disclosing of development chances, presentation of settlement differences derived from the size. Finally we formulate suggestions to a sensitive employment policy

ATR-FTIR study of the interaction of CO2 with bacterial cellulose-based membranes

Bacterial cellulose (BC) was used as an active material for fabrication of the membrane for CO2 capture. The BC-membrane is further modified with silk fibroin protein and ZnO nanoparticles in order to increase the number of sites that may bind CO2. The interaction of the CO2 with the membranes was investigated by means of ATR-FTIR spectroscopy. The argon purged membranes were used as the control samples. After pressurizing the membranes in CO2 at 3 bar, FTIR spectra were recorded and compared to the spectra of the controls. The interaction of the membrane materials with CO2 were studied by examining two regions of the spectra: 740-610 cm (1) (bending vibrations of CO2) and 2400- 2320 cm (1) (asymmetric stretching vibrations of CO2). The envelope of the bending mode peak in 740-610 cm (1) region is resolved into particular peaks and the appearance of the additional line at 654 cm (1) suggested that the absorption bands of CO2 alters because of the Lewis acid- base type of interaction with membranes. The changes in the region of asymmetric stretching vibrations of CO2 were even more pronounced after pressurization. The presence of the number of different sites (active groups) for the CO2 adsorption reflected in the appearance of several additional asymmetric stretching peaks. Also, due to the entrapment of the CO2 in the membrane, a typical C=O asymmetric stretching vibration line at similar to 2340 cm (1) is shifted towards lower frequencies. The analysis of the results suggested that there is a strong interaction of CO2 with BC membrane, which is additionally improved by its modification with silk fibroin and ZnO nanoparticles. From the results of CO2 permeation experiment, the basic BC membrane, silk fibroin- modified BC membrane and ZnO nanoparticles- modified BC membrane exhibited the CO2 permeability of 2.73, 2.69 and 2.66 Barrer, respectively. (C) 2017 Elsevier B.V. All rights reserved

ZnO-modified cellulose fiber sheets for antibody immobilization

Cellulose fiber sheets impregnated with saccharide capped-ZnO nanoparticles were used as bioactive materials for antibody immobilization. First, ZnO nanoparticles were synthesized in the presence of glucose (monosaccharide), sucrose (disaccharide) as well as alginic acid and starch (polysaccharides). The pine cellulose fibers were then modified by the obtained saccharide capped nanoparticles and further incorporated into the sheets. The presence of ZnO significantly improved the immobilization of the antibodies on the surface of the sheets. After rewetting the alginic acid-ZnO modified sheets with saline solution, the retention of antibodies was about 95%. A high degree of the immobilization of biomolecules is an important feature for possible fabrications of bioactive- or biosensing-papers and we successfully tested the sheets on the detection of blood types using (A, B, and D blood antibodies). The ZnO nanopartides affected also the other properties of the sheets. The ZnO-modified fiber sheets showed higher values of tensile index (strength), smoothness and opacity, while the value of porosity was substantially lower than that of the unmodified sheet. The presence of ZnO nanoparticles provided also the antimicrobial activity to the sheets. They showed a strong activity against bacteria (Escherichia coli and Staphylococcus aureus) and strong resistance to the attack of cellulase producing fungus Gloeophyllum trabeum