Contribution to studies on white-tailed eagle (Haliaeetus albicilla Linnaeus, 1758) in Western Serbia and the Republic of Srpska

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Spectrographic Trace Analysis of Tin in the Presence of Large Amounts of Iron

It is possible to lower the inferior limit of spectrographic trace analysis of Sn in iron and steel1 if the Sn is separated by coprecipitation from the solution obtained by dissolving the sample in a mineral acid. The coprecipitation of Sn2+ 2•3 was in these experiments tested with CdS which is formed in the investigated solution. The amount of Cd2+ must be known because the spectrographic lines of Cd were used as reference lines, i. e. as an internal standard

Novi fotogrametrijski instrumenti i pribori

Novi fotogrametrijski instrumenti i pribori

Telurometar – novi precizni instrument za merenje rastojanja

Telurometar – novi precizni instrument za merenje rastojanja

Telurometar – novi precizni instrument za merenje rastojanja

Telurometar – novi precizni instrument za merenje rastojanja

Novi fotogrametrijski instrumenti i pribori

Novi fotogrametrijski instrumenti i pribori

a-Hydrogen Exchange in the Re action of 2-Phenylethyldimethylsulphonium Ion with Base in Aqueous Solution and of 2-Phenylethyltrimethylammoni um Ion with Base in Aqueous and Alcoholic Solution

a-Hydrogen exch ange during the elimination from 2-phenylethyldimethylsulphonium bromide with on- in d euterium oxide h as been found to b e a lmost complete under certain r eactio n conditions. The product, trimethylamine, from the a n a logo u s reaction of 2-phenylethyltrimethylammonium iodide with eith er ethoxide ion in ethanol-0-d or with OD- in d~u terium oxide was found to contain no d etectabl e amount of deuterium above natural abundance

Long term prognosis in ischemic stroke patients treated with intravenous thrombolytic therapy

Uvod: Primena trombolitičke terapije je povezana sa boljim funkcionalnim oporavkom tri meseca nakon akutnog ishemijkog moždanog udara (AIMU), ali ostaje nejasno da li ima uticaj na preživljavanje i održavanje povoljnog efekta na funkcionalni oporavak tokom dužeg perioda praćenja. Cilj ovog istraživanja je bio da se proceni da li se povoljan efekat trombolitičke terapije na ishod održava godinu dana i više nakon moždanog udara. Metodologija: U ovoj kohortnoj studiji sa kontrolnom grupom ukupno je analizirano 259 tromboliziranih i 259 netromboliziranih bolesnika (uparenih prema polu, starosti i težini neurološkog deficita) koji su lečeni u periodu od februara 2006. godine do januara 2013. godine, u Jedinici za moždani udar Odeljenja urgentne neurologije Klinike za neurologiju. Rezultati: Vreme praćenja bolesnika od indeksnog AIMU je bilo do sedam godina, uz napomenu da je polovina bolesnika ispitivana minimum tri godine od primene trombolitičke terapije. Nakon perioda praćenja, nije bilo razlike u preživljavanju između dve grupe ispitanika: 56 (21,6%) bolesnika u grupi tromboliziranih je preminulo, naspram 62 (23,9%) u grupi netromboliziranih (Log Rank 0,240, p=0,624). Trombolitička terapija nije imala bitan efekat na preživljavanje bolesnika uprkos povećanom riziku od simptomatske intracerebralne hemoragije. Približno je svaki peti bolesnik preminuo u obe analizirane grupe tokom vremena praćenja. Godine starosti, težina neurološkog deficita, pojava sICH, ranog neurološkog pogoršanja, prethodna upotreba antiagregacione terapije, nepoznat uzrok AIMU i pojava medicinskih komplikacija tokom hospitalizacije su bili prediktori ranog letaliteta (u prvih 30 dana od nastanka AIMU). Godine starosti iznad 70 godina, težak neurološki deficit (NIHSS skor 15 i iznad), dijabetes melitus, atrijalna fibrilacija, medicinske komplikacije tokom hospitalizacije su bili prediktori dugoročnog mortaliteta. Odličan funkionalni oporavak tri meseca nakon AIMU bio povezan sa smanjenim rizikom od umiranja tokom perioda praćenja. Ključni rezultat ovog istraživanja je da se povoljan efekat trombolitičke terapije na funkcionalni oporavak održavao i nakon medijane vremena praćenja od tri godine od inicijalnog AIMU. Tako je odličan funkcionalni oporavak nakon perioda praćenja imalo oko 55% bolesnika u grupi tromboliziranih, naspram 43% u grupi netromboliziranih bolesnika (HR 1,64; 95% CI 1,16-2,32)...Background and Purpose: It remains unclear whether intravenous thrombolytic treatment with recombinant tissue plasminogen activator has an impact on the survival and maintenance of a favorable effect on functional recovery over a longer follow-up period. The aim of this study was to assess whether thrombolytic treatment has a favorable effect on functional recovery and survival more than one year after the stroke. Methods: This matched cohort study included 259 patients with acute IS treated with thrombolytic treatment plus standard care and 259 patients treated with standard care alone in the Stroke Unit in period from February 2006 to January 2013. Results: After the median follow-up period of 3 years (range 1 to 7 years), survival did not differ significantly between groups: 56 (21.6%) patients in thrombolyzed group versus 62 (23.94%) patients in non- thrombolyzed group died (Log Rank 0.240, p=0.624). In multivariate Cox proportional-hazards regression model older age, stroke severity, prior use of antiplatelet, occurrence of symptomatic ICH and medical complications during hospitalization were independent predictors of short term (30 days) mortality after stroke. In multivariate Cox proportional-hazards regression model older age (more than 70 years old), stroke severity (NIHSS≥15), history of diabetes mellitus and atrial fibrillation were independent predictors of long term mortality after stroke, while the excellent functional recovery three months after stroke was associated with a reduced risk of dying during the follow-up period. After follow- up period, 55% patients in IVT treated group versus 43% patients in control group had an excellent outcome- modified Rankin score 0-1 (HR 1.64, 95% CI 1.16-2.32). In multivariate Cox proportional-hazards regression model IVT treatment and decrease in NIHSS score in the first 24 h after treatment (8 point decrement or NIHSS 0) were positive predictors of an excellent stroke outcome . Adding the excellent three-month recovery in the multivariate model, this variable becomes the only strong predictor of outcome, HR 11.27; 95% CI 6.45-19.63; p<0.001. Medication persistence was higher among IVT- treated patients compared to non- IVT- treated patients. After adjustment for possible variables IVT was independent predictor of returning to full time job..

Contribution to studies on white-tailed eagle (Haliaeetus albicilla Linnaeus, 1758) in Western Serbia and the Republic of Srpska

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Optimization of the preparation of novel polymer/clay nanocomposites

Recent advances in material technologies have resulted in the preparation of novel polymer/clay composites with improved thermal, mechanical, optoelectronic/ magnetic properties and increased biodegradability [1]. In this study, six samples of poly(glycidyl methacrylate-co-ethylene glycol dimethacrylate) (PGME) nanocomposites with organically-modified montmorillonite clay Cloisite 30B® (C30B), were prepared via suspension copolymerization. In order to obtain nanocomposites with fine spherical beads of regular shape and satisfying thermal stability the optimization of the synthesis conditions was performed. Firstly, the influence of the poly(N-vinyl pyrrolidone) (PVP) quantity in the aqueous phase was varied (1, 3 and 5 wt.%) at a constant stirring rate of 250 rpm and constant clay content C30B (10 wt.%). In the second phase of the optimization of the preparation, samples with a constant composition of the composite reaction mixture (5 wt.% PVP and 10 wt.% C30B) at a stirring rate of 250, 325 and 400 rpm, were prepared. According to the obtained results, it was concluded that the optimal conditions for preparation of these composites are 5 wt.% of PVP and 400 rpm. The prepared nanocomposites were characterized with Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA) in air. The structure of the prepared nanocomposites was confirmed with FTIR spectroscopy. According to the obtained SEM microphotographs the fine spherical beads, with desired size and homogeneous morphology, were prepared. Furthermore, SEM analysis was also showed that clay nanoparticles are homogeneously dispersed both inside surface and cross-section area. The incorporation of C30B clay increased the thermal stability of the prepared polymer/clay nanocomposites in comparison to the pure PGME copolymer