Characterization of Angle Dependent Color Travel of Printed Multi-Color Effect Pigment on Different Color Substrates

Color-travel pigments, which exhibit much more extensive color change as well provide angle-dependent optical effect can be used in many industrial products. In present paper the multi-color effect pigment printed on three different foils with different background color (black, silver and transparent) was investigated. The pigment was based on synthetically produced transparent silicon dioxide platelets coated with titanium dioxide. CIEL*a*b* values and reflection of prints were measured by multi-angle spectrophotometer at constant illumination at an angle of 45º and different viewing angles (-15º, 15°, 25º, 45º, 75º and 110º) were used. The measurements of printed multi-color pigment showed that CIEL*a*b* color coordinates varied to great extents, depending on detection angles as well on color of the printing substrate. The study revealed that pigmnet printed on black background obtained significant change in color. The study has also shown that when viewing angle increases, the reflection curves decreases

A Role of Family Doctors in Taking Care of Men’s Health

The aim of this study was to investigate, based on routinely collected data, the scope of family doctors work in the field of men’s health. Based on the Croatian Health Service Yearbook in the period from 1995 to 2012, we collected the morbidity data related to male urogenital disorders. The total number of urogenital disorders almost doubled, but the number of diagnoses related to the men increased fourfold, mostly among the oldest patients. The number of prostate hyperplasia increased fivefold, again among the oldest people. The morbidity from other male-specific diseases increased threefold, mostly in the age group 7–19 years. In spite of the increase in the number of newly diagnosed cases of prostate cancer, the percentage of the deaths stabilized after 2001. Men’s health problems are frequent sees and with an upward trend.We are not sure if this means deterioration of men’s health, or just indicates the problem of »overdiagnosis«

Covalent organic frameworks as multifunctional materials for chemical detection

Sensitive and selective detection of chemical and biological analytes is critical in various scientific and technological fields. As an emerging class of multifunctional materials, covalent organic frameworks (COFs) with their unique properties of chemical modularity, large surface area, high stability, low density, and tunable pore sizes and functionalities, which together define their programmable properties, show promise in advancing chemical detection. This review demonstrates the recent progress in chemical detection where COFs constitute an integral component of the achieved function. This review highlights how the unique properties of COFs can be harnessed to develop different types of chemical detection systems based on the principles of chromism, luminescence, electrical transduction, chromatography, spectrometry, and others to achieve highly sensitive and selective detection of various analytes, ranging from gases, volatiles, ions, to biomolecules. The key parameters of detection performance for target analytes are summarized, compared, and analyzed from the perspective of the detection mechanism and structure–property–performance correlations of COFs. Conclusions summarize the current accomplishments and analyze the challenges and limitations that exist for chemical detection under different mechanisms. Perspectives on how future directions of research can advance the COF-based chemical detection through innovation in novel COF design and synthesis, progress in device fabrication, and exploration of novel modes of detection are also discussed

Web visibility of Romanian universities – an analysis based on website analytics and social media data

[EN] There are many aspects that influence the importance of a university. Among these, web visibility is taking advantage of available technology, focusing on the benefits of internet and social media. This paper provides an analysis of the Romanian public and private universities websites, using alexa.com, a tool for website traffic analysis. Moreover, the official social media accounts of universities (Facebook, Twitter, Google+, Flickr, YouTube and Instagram) were analysed, collecting several data such as: the number of likes and followers, the number of subscribers and the number of posts. The analysis was performed using ANOVA and Nonparametric Test for the presence via websites and Spearman and Pearson correlation to assess the correlation between social media and website traffic. In general, public universities from Romania have more visibility and a higher number of links to their websites compared to private ones. Based on the fact that Facebook and site content are often related, it should be noted that activity on Facebook may improve website rankings for Romanian universities.http://ocs.editorial.upv.es/index.php/HEAD/HEAD18Mirica, A.; Toma, IE. (2018). Web visibility of Romanian universities – an analysis based on website analytics and social media data. Editorial Universitat Politècnica de València. 571-578. https://doi.org/10.4995/HEAD18.2018.8036OCS57157

Influence of Fluorocarbon and Hydrocarbon Acyl Groups at the Surface of Bovine Carbonic Anhydrase II on the Kinetics of Denaturation by Sodium Dodecyl Sulfate

This paper examines the influence of acylation of the Lys-ε-NH3+ groups of bovine carbonic anhydrase (BCA, EC 4.2.1.1) to Lys-ε-NHCOR (R = −CH3, −CH2CH3, and −CH(CH3)2, −CF3) on the rate of denaturation of this protein in buffer containing sodium dodecyl sulfate (SDS). Analysis of the rates suggested separate effects due to electrostatic charge and hydrophobic interactions. Rates of denaturation (kAc,n) of each series of acylated derivatives depended on the number of acylations (n). Plots of log kAc,n vs n followed U-shaped curves. Within each series of derivatives, rates of denaturation decreased as n increased to 7; this decrease was compatible with increasingly unfavorable electrostatic interactions between SDS and protein. In this range of n, rates of denaturation also depended on the choice of the acyl group as n increased to 7, in a manner compatible with favorable hydrophobic interactions between SDS and the −NHCOR groups. As n increased in the range 7 < n < 14, however, rates of denaturation stayed approximately constant; analysis suggested that these rates were compatible with an increasingly important contribution to denaturation that depended both on the net negative charge of the protein and on the hydrophobicity of the R group. The mechanism of denaturation thus seems to change with the extent of acylation of the protein. For derivatives with the same net electrostatic charge, rates of denaturation increased with the acyl group (by a factor of 3 for n 14) in the order CH3CONH− < CH3CH2CONH− < (CH3)2CHCONH− < CF3CONH−. These results suggested that the hydrophobicity of CF3CONH− is slightly greater (by a factor of <2) than that of RHCONH− with similar surface area.Chemistry and Chemical Biolog

Nine-year Trends in the Morbidity of Mental Disorders and Psychotropic Drug Utilization in Croatia: Over-diagnosis and Over-utilization?

Overall drug overuse, including psychotropic, is the Croatian reality. Therefore, in between 2000 and 2012, the interventions to control drug overspending were undertaken. The main aims of the study are: to determine the morbidity trends of mental disorders registered in family medicine (FM), the trends in psychotropic drug utilization and to identify whether the trends of utilization have any relation to the interventions. The results indicate that mental disorders represent a high disease burden in Croatia. It was also present a higher burden of psychotropic drug utilization; second ranked in the total drug utilization during the nine-year follow up period. The utilization of psycholeptic’s, was even higher; from 2004 to 2008; those drugs were ranked first in terms of utilization. Between 20–25% of Croatia’s total health care budget is usually spent on drugs. The interventions that are currently being implemented to control drug utilization have not brought about any changes