Evaluation of Dye and Pigment Based Ink Jet Ink Sets

The development of high performance inkjet printers and inks is advancing rapidly. Manufacturers seem to introduce their new technology inks to the market on an almost daily basis. Chemists in ink laboratories are still fighting with the issue of combining a wide gamut of dye-based inks with the lightfast and weather resistance qualities of pigment-based inks into new-age ink formulations. Three different inkjet printers and inks were investigated in this work: the Epson Stylus® Pro 5000, using a dye-based ink set, the Epson Stylus® Pro 5500, employing Archival ink technology, and the Epson Stylus® Photo 2200, with 7-color UltraChrome™ inks. A number of different commercial substrates were sampled. Printability tests were carried out to test and evaluate ink/printer/substrate interactions. Particle size analyses of the three ink types were investigated. Color gamuts and ICC profiles for each of the different printer/ink/substrate sets were compared. In addition, the accuracy of each printer’s color profile was investigated. The results of the profile accuracy measurements were expressed in terms of CIE L*a*b* coordinates and Root Mean Square (RMS) E. Results of accelerated lightfastness tests for the different ink sets were interpreted in terms of change of profile and color gamut

Education of the next generation of managers in context of green economy

This paper deals with the issue of education for sustainable development of the generation of future managers in the context of the green economy. The paper analyses the need for environmental education of graduates in theoretical way who are expected to act as executives and in positions which are defined as Green Enhanced Skills Occupations or shortly Green Jobs and who should be able to apply the tools of environmental protection in a business sector, municipalities or third sector. The essential part of the article presents the partial results of the research, which was focused on finding whether students of economic universities are aware of issue of sustainable development and environmental policy tools, which can help the implementation of green economy in the practice and whether this issue is taught at universities. At the end of the article authors point out the important role of universities in preparing the future managers to work in the green economy

Economical and ecological consequences of the management of biological wastes arising in the intensive agricultural livestock production

In the article the issues of economical and ecological consequences of the management of biological wastes arising in the intensive agricultural livestock production are described

Attitude Towards Peer-to-Peer Accommodation: Evidence from Tourists in the Philippines

The study responds to the paucity of understanding of tourists\u27 attitudes toward peer-to-peer (P2P) accommodation services in less-developed economies. By gaining insights into the extant literature, the study proposes and tests a research model that accents the impact of perceived economic benefits, social incentives, and trust on consumers’ attitudes towards P2P accommodation. Notably, it also explores the potential attitudinal effect of the new materialist lifestyle. Data were collected through a web-based survey involving 112 consumers aware of P2P accommodation with prior domestic tourism experience in the Philippines. Partial least squares structural equation modelling technique was employed for data analysis. The findings reveal that only economic benefits and trust perceptions can predict consumers’ attitudes towards P2P accommodation services. Considering this, accommodation providers should continue to emphasize the economic value of their services to expand the customer base. Additionally, platform and accommodation providers can also enhance trust-building initiatives to reduce consumers\u27 risk perceptions potentially aggravated by the ongoing pandemic

Concepciones encontradas en torno a la literatura intercultural: el caso de la literatura infantil y juvenil

The aim of this study is to analyse the different conceptions that exist of children’s and youth literature labelled as multicultural. Conceptions that emanate from two sets of academical discourses on this topic are compared, namely those originated in Spanish research centers and those proceeding from the USA. The analysis focuses on the criterions defining this literature: the aesthetic and formal, the thematic and representational, the authorship-based and the axiological. It is found that the different ways of conceiving multicultural children’s and youth literature relate to different ways of conceiving the cultural difference, as well as to different intervention proposals for situations in which the cultural diversity turns out to be troublesome.En este trabajo se analizan las distintas concepciones existentes en torno a la literatura infantil y juvenil denominada intercultural. Se comparan las concepciones que emanan de dos conjuntos de discursos académicos dedicados a este tema: los provenientes de centros de investigación españoles y de los estadounidenses. El análisis se centra en los criterios de definición de esta literatura: el criterio estético-formal, el temático-representacional, el de autoría y el axiológico. Se descubre que las diferentes maneras de concebir la literatura infantil y juvenil multi e intercultural se corresponden con diferentes maneras de concebir la diferencia cultural, así como con diferentes propuestas de intervenir cuando la diversidad cultural implica problematicidad

Flow Based Enumeration of Plasmablasts in Peripheral Blood After Vaccination as a Novel Diagnostic Marker for Assessing Antibody Responses in Patients with Hypogammaglobulinaemia

Computer modelling & simulatio

Classical and quantum-mechanical scaling of ionization from excited hydrogen atoms in single-cycle THz pulses

Excited atoms, or nanotip surfaces, exposed to strong single-cycle terahertz radiation emit electrons with energies strongly dependent on the characteristics of the initial state. Here we consider scaling properties of the ionization probability and electron momenta of H(nd) atoms exposed to a single-cycle pulse of duration 0.5–5 ps, with n=9,12,15. Results from three-dimensional quantum and classical calculations are in good agreement for long pulse lengths, independent of pulse strength. However, differences appear when the two approaches are compared at the most detailed level of density distributions. For the longest pulse lengths a mixed power law, n-scaling relation, αn−4+(1−α)n−3 is shown to hold. Our quantum calculations show that the scaling relation puts its imprint on the momentum distribution of the ionized electrons as well: By multiplying the emitted electron momenta of varying initial n level with the appropriate scaling factor the spectra fall onto a common momentum range. Furthermore, the characteristic momenta of emitted electrons from a fixed n level are proportional to the pulse strength of the driving field.publishedVersio

Consumer Attitude and Behavior towards Bio-products in Slovak Republic

Bio-product market is very challenging and developing rapidly. Consumers have raised great interest in healthy and tasty diet with high nutritional compounds, confidence in food safety, environmental and animal welfare concern and also sustainability. The aim of this paper is to analyze consumer attitude and behavior as well as the factors influencing purchasing behavior when deciding to buy bio-products or their substitutes. The essential part of the article presents the partial results of the research, which was directed to consumers buying bio-products in Slovakia.

Economical and ecological consequences of the management of biological wastes arising in the intensive agricultural livestock production

In the article the issues of economical and ecological consequences of the management of biological wastes arising in the intensive agricultural livestock production are described

A single mutation in a tunnel to the active site changes the mechanism and kinetics of product release in haloalkane dehalogenase LinB

Many enzymes have buried active sites. The properties of the tunnels connecting the active site with bulk solvent affect ligand binding and unbinding and, therefore, also the catalytic properties. Here, we investigate ligand passage in the haloalkane dehalogenase enzyme LinB, and the effect of replacing leucine by a bulky tryptophan at a tunnel-lining position. Transient kinetic experiments show that the mutation significantly slows down the rate of product release. Moreover, the mechanism of bromide ion release is changed from a one-step process in the wild type enzyme to a two-step process in the mutant. The rate constant of bromide ion release corresponds to the overall steady-state turnover rate constant, suggesting that product release became the rate-limiting step of catalysis in the mutant. We explain the experimental findings by investigating the molecular details of the process computationally. Analysis of trajectories from molecular dynamics simulations with the CAVER 3.0 program reveals differences in the tunnels available for ligand egress. Corresponding differences are seen in simulations of product egress using the Random Acceleration Molecular Dynamics technique. The differences in the free energy barriers for egress of a bromide ion calculated using the Adaptive Biasing Force method are in good agreement with the differences in rates obtained from the transient kinetic experiments. Interactions of the bromide ion with the introduced tryptophan are shown to affect the free energy barrier for its passage. The study demonstrates how the mechanism of an enzymatic catalytic cycle and reaction kinetics can be engineered by modification of protein tunnels