Photoacousic Properties of Thin Film Zinc-Stannate

Poster presented at the The Seventh Yugoslav Materials Research Society Conference - YUCOMAT 2005, Herceg Novi, Crna Gora, September 12-16, 2005

Smanjeno oslobađanje interleukina-1β u miševa nakon poslijeupalnog davanja azitromicina i klaritromicina.

The literature indicates that, in addition to anti-bacterial effects, certain macrolide antibiotics, such as azithromycin and clarithromycin, also exert anti-inflammatory and immunomodulatory activity, by accumulating in inflammatory cells and inhibiting the secretion of pro-inflammatory cytokines. Previous reports have shown that pre-treatment with these macrolides attenuates induced immediate skin inflammatory reactions in mice. However, the anti inflammatory activity of the post-inflammatory induction of macrolide antibiotics in this experimental model has not been investigated. The aim of this study was to explore whether the anti-inflammatory activity of azithromycin and clarithromycin, applied transdermally, 30 min after a phorbol 12-myristate 13- acetate (PMA)-induced immediate skin inflammation in mice, could attenuate a Th1 inflammatory reaction. The capacity of azithromycin and clarithromycin (500 μg/ear) to exert anti-inflammatory effects, similar to those of dexamethasone (50 μg/ear), was confirmed by the inhibition by all three agents of ear swelling and interleukin- 1β concentration in the ear tissue of PMA-treated mice, supporting this clinically relevant treatment mode.Literaturni podaci pokazuju da odgovarajući makrolidni antibiotici, poput azitromicina i klaritromicina, osim protubakterijskih učinaka posjeduju i protuupalna i imunomodulacijska svojstva koja se očituju njihovim nakupljanjem u upalnim stanicama i sprječavanjem oslobađanja proupalnih citokina. Dosadašnja istraživanja pokazuju da davanje navedenih makrolida u miševa, prije izazivanja upale, umanjuje neposrednu upalnu reakciju kože. Međutim, njihova protuupalna svojstva nakon poslijeupalnog davanja u ovom pokusnom modelu nisu istražena. Cilj ovog istraživanja bio je istražiti da li azitromicin i klaritromicin, naneseni na površinu uške miševa 30 minuta nakon izazivanja neposredne upale kože s forbol 12-miristat 13-acetatom (PMA), svojim protuupalnim djelovanjem umanjuju Th1 upalni odgovor. Protuupalni učinci azitromicina i klaritromicina (500 μg / uški) bili su podjednaki protuupalnom djelovanju deksametazona (50 μg / uški), u smislu smanjenja otekline uške i koncentracije interleukina-1β u tkivu uške miševa obrađivanih s PMA om, što ide u prilog klinički relevantnom načinu liječenja

Segmented thermistors printed using NTC nanometric paste on alumina and Sr-ferrite substrates

Poster presented at 12th Annual Conference of the Materials Research Society of Serbia - YUCOMAT 2010, Herceg Novi, Montenegro, 6–10. septembar 2010

Microstructure development and electrical properties of NiO doped alpha-Fe2O3

Poster presented at the 4th Serbian Congress for Microscopy, Belgrade, Serbia, 2010, October 11-12, 201

A Detailed XRD and FTIR Analysis of Bi2O3 Doped ZnO-SnO2 Ceramics

Poster presented at the 2nd International Congress on Ceramics, Verona, Italy, June 29 - July 4, 200

Microstructure development and electrical properties of NiO doped alpha-Fe2O3

Poster presented at the 4th Serbian Congress for Microscopy, Belgrade, Serbia, 2010, October 11-12, 201

Strain measurements during static pile testing: a case study of two piles with diferent diameter and length

The paper presents testing of two piles, diameter of Ø1200mm and Ø800mm, length of 26.0m and 18.0m respectively. Tests were conducted on construction project WELLPORT III phase - New Belgrade, Republic of Serbia. The piles were erected using CFA technology by Novkol jsc. - Belgrade. The tests were conducted according to the standard SRPS EN ISO 22477-1: 2019, jointly by the Laboratory for structures of the Faculty of Civil Engineering University of Belgrade and Laboratory of Novkol jsc. - Belgrade. In addition, beside to the common and inevitable measurement of pile settlement with respect to the applied load during test phases, tests include measurements of strain along the pile depth. Measurements of strain were carried using so-called ‘sister-bar’ based on resistance principle (classical foil strain gages), as well as using embedded sensors based on ‘vibrating-wire’ principle of strain measurement, as both principles of strain measurements are state-off-the-art in actual practice. Installation of all instruments were incorporated in pile reinforcement assembly at several levels before casting. During testing, beside to recording force at pile head and settlements by LVDTs which were leaned on the reference beam, there were recorded and realized strain levels on all installed instruments. During data reduction phase, computation of actual force was realized at each section with strain measurement, based on axial stiffness of tested piles. Using such a procedure, forces in tested piles were calculated. Such data gave possibility to explore part of force which was transmitted by pile shaft along the depth to the surrounding soil, as well as the part which goes to the pile base. All results are shown in illustrative diagrams of corresponding stresses between pile shaft and surrounding soil, force levels along the pile depth, and finally level of force which transfer by pile shaft and pile base. According to the facts that pile bases were in different soil level, and with different diameters, the different ratio between force levels which transferred by pile shaft and pile base were established

Influence of Bi2O3 on microstructure and electrical properties of ZnO-SnO2 ceramics

The effects of small amounts (0.5; 1.0 and 1.5 mol. %) of bismuth oxide on the microstructure and electrical properties of ZnO-SnO2 ceramics have been studied. Starting powders of ZnO and SnO2 were mixed in the molar ratio 2:1. After adding Bi2O3 this mixture was mechanically activated for 10 minutes in a planetary ball mill, uniaxially pressed and sintered at 1300ºC for 2h. The phase composition of the sintered samples was analyzed by X-Ray Diffraction (XRD) and by Energy Dispersive Spectrometer (EDS). Morphologies were examined by Scanning Electron Microscopy (SEM). An Impedance/Gain Phase Analyzer (HP 4194A) was used to measure the impedance spectra (100Hz - 10MHz) at different temperatures. The electrical DC resistivity/conductivity at different temperatures was measured using a High Resistance Meter (HP 4329A)

Thermal diffusivity of single crystal Bi0.9Sb0.1

A single crystal Bi0.9Sb0.1 ingot was synthesized using the Bridgman technique. Thermal diffusivity and electronic transport properties of single crystal cleaved plates (00l) were determined from PA photoacoustic phase and amplitude spectra obtained using the photoacoustic method with a transmission detection configuration. Both the PA phase and amplitude were measured versus the modulation frequency and numerically analyzed. EDS analyses done to determine chemical composition of the studied samples as well as to check sample homogeneity. Hall effect measurements data were used for the photoacustic measurements

Molecular diagnostics of swine infection caused by Mycoplasma suis

The presence of two types of haemoplasm can be established in the swine population. Pathogenic haemoplasm, named Mycoplasma suis (previously called Eperythrozoon suis) is the cause of swine eperythrozoonosis or swine ichtheroanaemia. The cause of this disease can also infect humans. The disease has spread all over the world. The most frequent form is latent infection of swine caused by M. suis. The disease is clinically manifest following action by the stress factor. The acute course of the disease is characterized by the occurrence of a febrile condition and ichtheroanaemia. The disease is usually diagnosed based on an epizootiological poll, a clinical examination, and a microscopic examination of a blood smear stained most often according to Giemsa. Contemporary methods of molecular biology have been developed, such as PCR, which are more sensitive and specific in making a diagnosis of swine infection caused by M. suis. In these investigations, the presence of M. suis on pig farms in the Republic of Serbia has been determined using the PCR test.