Time filter

Source Type

Koperska M.A.,Jagiellonian University | Pawcenis D.,Jagiellonian University | Bagniuk J.,Jan Matejko Academy of Fine Art in Krakow | Zaitz M.M.,Jagiellonian University | And 3 more authors.
Polymer Degradation and Stability | Year: 2014

Infrared spectroscopy (FTIR) is a commonly available tool in laboratories dealing with both degradation of materials and conservation of art objects to evaluate their condition. In this paper FTIR was engaged to study degradation of fibroin included in silk samples (Bombyx mori) artificially aged at various conditions (oxygen, water vapor and volatile organic products) at temperature of 150 °C. The results collected by Attenuated Total Reflectance/Fourier Transform Infrared Spectroscopy (ATR/FTIR) were validated by UV/Vis, XRD and SEC analyses. Based on the results, the degradation estimators were verified and classified as: (1) crystallinity defined as ratio of absorbance at 1620 and at 1656 cm-1, A1620/A1656[1], or at 1620 and 1699 cm-1, A1620/A1699[2]; or ratio of areas under fitted curves of band at 1261 and 1230 cm-1, P1261/P 1230[3], (2) oxidation - A1620/A1514 and (3) depolymerization - P1318/P1442. Degradation gauges defined in such a way indicate that upon artificial aging water vapor and oxygen has the most profound impact on the progress of silk degradation. It also indicates that oxygen-lean conditions stabilize silk at elevated temperature. © 2014 Elsevier Ltd. All rights reserved.

Staniszewska E.,Jagiellonian University | Malek K.,Jagiellonian University | Kaszowska Z.,Jan Matejko Academy of Fine Art in Krakow
Journal of Raman Spectroscopy | Year: 2013

Fourier transform infrared (FT-IR) and Raman spectroscopy is used for the non-destructive analysis of painting materials and ageing compounds in micrometric cross sections of a glass painting. The combination of both techniques in conjunction with imaging/mapping function provides the spatial distribution of chemical components identified in vibrational spectra. The aim of our work is to show the applicability of the FT-Raman mapping technique in the detection of painting materials. We also compare Raman information gained by using two laser excitations at 532 and 1064 nm implemented in microspectrometers with different confocality and spatial resolution. In turn among FT-IR imaging techniques, we compare chemical images recorded in external reflection and attenuated total reflection modes that give chemical images of different size and spatial resolution. Our FT-IR and Raman imaging characterize a number of painting materials such as pigments, binders, fillers as well as degradation products. Raman maps are constructed by using the univariate analysis. In turn, a profile of IR images requires the use of a more complex methodology. Here, we compare FT-IR images of the painting cross sections obtained by using the univariate and hierarchical cluster analysis. We clearly show that the multivariate approach is a powerful tool for the credible construction of IR images, providing the relevant chemical information on the multicomponent stratigraphy of the samples. Moreover, the combination of all the methods allows us to demonstrate their degree of utility for the study on the paint cross sections of the works of art. Copyright © 2013 John Wiley & Sons, Ltd.

Kamysz K.,Jan Matejko Academy of Fine Art in Krakow | Wichrowski M.,Polish-Japanese Institute of Information Technology
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2014

This work presents a prototype of non-chronological open structure children narrative dedicated for tablets. How will young readers find themselves in this new environment and react to new kind of storytelling experience? Is the notion of “interactivity” just a marketing trick to sell more software and mobile apps or is it a tool that will really support a child’s development?. © Springer International Publishing Switzerland 2014.

Plotek M.,Jagiellonian University | Plotek M.,Jan Matejko Academy of Fine Art in Krakow | Starosta R.,Wroclaw University | Komarnicka U.K.,Wroclaw University | And 4 more authors.
Dalton Transactions | Year: 2015

Addition of aminomethylphosphane P{CH2N(CH2CH2)2O}3 (1), PPh2{CH2N(CH2CH2)2O} (2) or PPh2{CH2N(CH2CH2)2NCH2CH3} (3) to a methanolic solution of RuCl3 results in reduction of ruthenium(iii) ions giving finally ttt-[RuCl2(1)2] (1A), ttt-[RuCl2(2)2] (2A) and ttt-[RuCl2(3)2] (3A). The synthesized complexes are the first examples of ruthenium(ii) coordination compounds possessing aminomethylphosphanes chelating via phosphorus and nitrogen atoms. They were fully characterized (NMR, ESI-MS, IR, elemental analysis, X-ray crystallography). Preliminary studies of the in vitro cytotoxicity on the A549 cell line (human lung adenocarcinoma) and interactions with human serum proteins (albumin and apotransferrin) showed moderate activity of the complexes. Interestingly, the P,N-chelation leads to formation of strained 4-membered Ru-P-C-N-Ru rings, which in the case of 2A and 3A undergo opening in the presence of CH3CN, which results in rearrangement to ctc-[RuCl2(2)2(CH3CN)2] (2B) and ctc-[RuCl2(3)2(CH3CN)2] (3B). This journal is © The Royal Society of Chemistry 2015.

Agency: Cordis | Branch: FP7 | Program: CSA-SA | Phase: FP7-PEOPLE-2009-NIGHT | Award Amount: 149.08K | Year: 2010

If you wish to accompany researchers on an exploration of the mysteries of the world, come to Malopolska on 24 September 2010! On this unique night Malopolska will once again go science mad. Adventures with researchers will take place in three cities of the region: Krakow, Tarnow and Nowy Sacz. Researchers Night will provide a chance to meet and interact with researchers not only in their natural habitat but also in unexpected situations and venues. On this once-in-a-year occasion researchers will take on different personas: those of excellent actors, brilliant directors, guides through the mysterious nooks and crannies of scientific laboratories, sports competitors and geniuses who know the answers to almost any question. The event will provide an excellent opportunity to challenge the stereotypes and promote the image of researchers as a colourful, attractive and creative community. By gaining an insight into the work of researchers, young people will be encouraged to consider a career in research as an alternative to the much-advertised professions in business, entertainment, politics or the media.

Discover hidden collaborations