Relationship Between Some Structural Elements of Macedonian Pine (Pinus peuce Gris.) in Different Elevations in National Park Pelister in North Macedonia

The influence of elevation on the forest development and also on more structural elements is evident. The aim of this paper is to research the impact of elevation on the relationship between diameter at breast height (DBH), tree height (H), crown length (L) and stem volume (V). In the area of the Pelister National Park in North Macedonia, 22 experimental plots (EPs) were established in the even-age Pinus peuce Gris. stands with an average age of 90 years. The EPs were of a circular form and covered an area of 500 m2 each; 6 of them were established at 1150 meter above sea level (m asl), 7 at 1350 m asl and 9 at 1550 m asl. DBH, tree height, and crown length of 481 trees were measured in all EPs. The DBH – H model was prepared in accordance with Prodan, as well as nonlinear (polynomial) regression for the relation between DBH and L and nonlinear (power) regression for the relation between DBH and V. The stem volume was calculated with a formula by Parishko for Pinus peuce Gris. The quadratic mean of DBH, average Loray height, average crown ratio, and the density of the stands were also calculated. The relationship between DBH and H, L, and V was examined with Pearson correlation and root mean square deviation (RMSE). The differences between averages of H, L, and V from the EPs were tested with analysis of variance (ANOVA) with an elevation class (1150, 1350 and 1550 m asl) as single factor. The density of stands was 490, 429 and 409 trees per ha on 1150 m, 1350 m and 1550 m asl, respectively. The average DBH was 39.8 cm, 46.5 cm and 45.5 cm, and Loray height was 23.9 m, 24.1 m and 22.6 m at 1150 m, 1350 m and 1550 m asl, respectively. Crown ratio (CR) pointed out different results on the different elevations, with the average value of 40.5%, 43.7%, and 39.3% at 1150 m, 1350 m, and 1550 m asl, respectively. Differences between average structural elements at different elevations can be confirmed with ANOVA with a significance of p<0.05 and F of 3.4 for H, the significance of p<0.05 and F 3.2 for L data and p<0.05 and F of 9.7 for the value of V. In that way, the regression model for H is higher at a lower elevation, the tree has a longer crown length at lower elevation and also has a bigger volume at lower elevation. From the results, it can be concluded that the elevation has an influence on the relationship between DBH on the one hand and H, L and V as structural elements on the other hand. It can be said that at higher elevation trees have a smaller average height, DBH, and volume and have longer crown length than trees at lower elevation

Patomorfološke promene i distribucija virusnog antigena kod ptica inficiranih patogenim sojem H5N1 virusa avijarne influence

The aim of this study was to determine pathomorphological lesions in the organs of birds infected with H5N1 avian influenza virus, presence and distribution of the viral antigen in tissue samples and the degree of their correlation. Examination was conducted on the carcasses of seven mute swans (Cygnus olor) and one domestic rooster (Gallus gallus domesticus). After necropsy, trachea, lungs, liver, spleen, pancreas, kidney and intestine tissues were sampled for histopathology and immunohistochemical examination. LSAB method and H5N1 avian influenza virus nucleoprotein polyclonal antibodies were used for detecting the viral antigen in the examined tissues. The most frequent gross lesions were hemorrhages and necroses of the pancreas. Major histological lesions were multifocal necroses in the pancreas, liver and spleen, non purulent encephalitis, with neuronal dystrophy and neuronophagia. Viral nucleoprotein was immunohistochemically proven in the pancreas, brain, liver, lungs, and in one swan in the kidney. A high correlation between pathomorphological lesions and distribution of the viral antigen was determined.Cilj ovog ispitivanja je bio utvrđivanje patomorfoloških promena na organima ptica inficiranih H5N1 virusom avijarne influence, imunohistohemijsko utvrđivanje prisustva i distribucije virusnog antigena u parafinskim isečcima uzoraka njihovih organa, kao i utvrđivanje stepena njihove korelacije. Ispitivanje je izvršeno na organima sedam labudova grbaca (Cygnus olor) i jednog petla (Gallus gallus domesticus). Nakon izvršene obdukcije i makroskopskog pregleda svih organskih sistema, izvršeno je uzorkovanje tkiva mozga, traheje, pluća, jetre, slezine, pankreasa, bubrega i creva za patohistološka i imunohistohemijska ispitivanja. Korišćena je LSAB imunohistohemijska metoda sa poliklonskim antitelima na nukleoprotein virusa avijarne influence podtipa H5N1. Dominantne promene utvrđene makrokopskim pregledom bile su krvavljenja i nekroze pankreasa. Histološkim pregledom su ustanovljene multifokalne nekroze pankreasa, jetre i slezine, a u velikom mozgu promene u tipu negnojnog encefalitisa, praćene distrofijom i nekrozom nervnih ćelija i pojavom neuronofagije. Virusni nukleoprotein je imunohistohemijski dokazan u pankreasu, mozgu, jetri, plućima, slezini, a kod jednog labuda i u bubrezima. Utvrđen je visok stepen korelacije između ustanovljenih patomorfoloških promena i distribucije virusnog antigena

Supplementary data for article: Marjanović-Trajković, J.; Divjakovic, V.; Matovic, R.; Ferjančić, Z.; Saičić, R. Double Asymmetric Induction in Organocatalyzed Aldol Reactions: Total Synthesis of (+)-2-Epi-Hyacinthacine A(2) and (-)-3-Epi-Hyacinthacine A(1). European Journal of Organic Chemistry 2013, 2013 (25), 5555–5560. https://doi.org/10.1002/ejoc.201300716

Supporting information for: [https://doi.org/10.1002/ejoc.201300716]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/1389

Paradigm of coinfection with viral and bacterial agents causing bovine respiratory disease complex (BRDC) in Central Serbia

Viral and bacterial agents causing bovine respiratory disease complex (BRDC) were examined over a five-year period (2015-2019). Thirty-eight farms of beef and dairy cattle from Central Serbia which showed symptoms of BRDC were observed. A total of 118 nasal swab specimens collected from diseased bullocks (n=55), cows (n=18) and calves (n=45) were chosen for the isolation of bacteria and identification by aerobic cultivation. The most commonly isolated bacterial pathogen was Pasteurella multocida (72.88% positive samples). Disk-diffusion method (antibiogram) showed that Amoxiclav and Enrofloxacin were the most efficient antibiotics against Pasteurella multocida isolates (66.67% and 54.17%, respectively). From all examined samples, using the Real Time RT-PCR and PCR methods, we determined the genome sequences of bovine respiratory syncytial virus (BRSV-34.78% of tested samples (8/23), bovine viral diarrhea virus (BVDV, in 34.37% (11/32) and Mycoplasma spp. in 33.33% (8/24). The genome of BoHV-1 virus was not detected in any of the 19 samples tested by Real Time PCR method.Publishe

Rendu-Osler-Weber Syndrome: A Case Report

Abstract Hereditary hemorrhagic telangectasia (HHT) or Rendu-Osler-Weber syndrome, is a rare genetic disorder with autosomal dominance and variable penetrance. The typical findings of the disease are telangiectasias in skin and mucous membranes, and arteriovenous malformations presenting in the organs like lung, intestine, brain and liver. It is characterized by the classic triad of recurrent epistaxis, mucocutaneous telangiectasias and visceral hemorrhages, with familial occurrence. This article describes a case of HHT of an adult patient, associated with multiple angiodysplasic injuries in the nasal mucosa, upper gastrointestinal tract, lungs and who presents continuous blood loss, resulting iron deficiency anemia. Based on clinical and diagnostic findings, we diagnosed this case as HHT, which has rarely been reported in our literature

The effect of nanoceria’s coating on their suspension stability

Cerium oxide nanoparticles CeO2 (nanoceria) is interesting biomaterial due to coexistence of Ce3+ and Ce4+ ions and formation of oxygen vacancies on its surface. This dual behavior of nanoceria represents a great pharmacological potential, such as improving the treatment of cancers, drug delivery and catalysis. Nanoceria can protect healthy cells from oxidative stress because they are potent free radical scavenger, but they also show cytotoxicity after prolonged exposure of cells to higher concentrations. The main problem of their further biomedical application is their low solubility in water, which could be improved by coating of nanoparticles. The aim of this study was to develop appropriate methods for coating CeO2 nanoparticles with three different carbohydrates and testing the effect of coating on their suspension stability. For nanoparticles characterisation were used X-Ray and FTIR spectroscopy and SEM (scanning electron microscopy). The effect of nanoparticles' coating on their suspension stability were investigated by measuring turbidity

Procedure for application of cutting tools with diamond coating in the processing of Al-12% Si alloy and glass fiber / polyester resin composites on lathe

Postupak primene reznog alata sa dijamantskom prevlakom pri obradi legure Al-12%Si i kompozita staklena vlakna/poliesterska smola na strugu je u primeni otpornosti na habanje reznog alata sa dijamantskom prevlakom i površinske hrapavosti obrađivanih površinana definisanje optimalnih režima obrade pomenutih materijala na CNC strugu. Postupak se sastoji od tri faze: 1. Određivanje krive habanja alata sa dijamantskom prevlakom pri mašinskoj obradi legure i kompozita na strugu. 2. Određivanje dijagrama površinske hrapavosti za dati rezni alat. 3. Analiza reznih ivica dijamantskog alata primenom skenirajućeg elektronskog mikroskopa (SEM).The procedure for application of cutting tools with diamond coating in the processing of Al-12% Si alloy and glass fiber / polyester resin composites on lathe is in the application of wear resistance of cutting tools with diamond coating and surface roughness of machined surfaces defining optimal processing modes. The procedure consists of three phases: 1. Determination of the wear curve of tools with diamond coating during machining of alloys and composites on a lathe. 2. Determining the surface roughness diagram for a given cutting tool. 3. Analysis of cutting edges of diamond tools using scanning electron microscope (SEM).Broj prijave: П-2021/0115Podaci o nosiocu prava: INSTITUT ZA NUKLEARNE NAUKE „VINČA“ – INSTITUT OD NACIONALNOG ZNAČAJA ZA REPUBLIKU SRBIJU, UNIVERZITETA U BEOGRADU (CENTAR ZA SINTEZU, PROCESIRANJE I KARAKTERIZACIJU MATERIJALA ZA PRIMENU U EKSTREMNIM USLOVIMA-CEXTREME LAB), Mike Petrovića Alasa 12-14, 11351 Beograd-Vinča, RSPriznati datum podnošenja prijave: 26.01.202

Machinability assesment procedure of superalloys

Postupak ocene obradljivosti superlegura mašinskom obradom je postupak u kome se primenjuju tri kriterijuma obradljivosti: ocena obradljivosti preko postojanosti alata, ocena obradljivosti preko temperatura pri mašinskoj obradi rezanjem i ocena obradljivosti na osnovu oblika i stepena deformisanosti strugotine. Za određivanje ovih ocena korišćeni su eksperimentalni podaci dobijeni snimanjem toka habanja alata, merenjem temperatura u zoni rezanja i određivanjem vrednosti faktora sabijanja strugotine pri obradi superlegura na bazi nikla IN-100 i MAR-M247.The machinability assessment procedure of superalloys is a procedure in which three machinability criteria are applied: machinability assessment based on tool stability, machinability assessment based on cutting temperatures and machinability assessment based on the shape and degree of chip deformation. To determine these assesments, experimental data obtained by recording tool wear process, measuring temperatures in the cutting zone and determining the value of the chip compaction factor when processing nickel-based superalloys IN-100 and MAR-M247 were used.Broj prijave: П-2021/0356Podaci o nosiocu prava: INSTITUT ZA NUKLEARNE NAUKE „VINČA“ – INSTITUT OD NACIONALNOG ZNAČAJA ZA REPUBLIKU SRBIJU, UNIVERZITETA U BEOGRADU (CENTAR ZA SINTEZU, PROCESIRANJE I KARAKTERIZACIJU MATERIJALA ZA PRIMENU U EKSTREMNIM USLOVIMA-CEXTREME LAB), Mike Petrovića Alasa 12-14, 11351 Beograd-Vinča, RSPriznati datum podnošenja prijave: 18.03.202

Financial position and credit rating of companies in circular economy in Serbia

The circular economy concept is increasingly gaining in importance. The world's most developed economies pay more and more attention to this concept. The European Union adopted a special document to affirm the concept. In Serbia, this concept is in its early stages, but is being practically (production) and institutionally actuated. This paper analyses a sample of six companies engaged in different production options in the area of circular economy. The aim of the paper is to analyse the perspective of a new concept in Serbian economy, through assessment of the financial position and credit rating of these companies by applying Altman's Zʼ and Z'- adjusted score model. The findings in the paper showed that the companies which had been subject to this analysis have such financial position and credit rating that make assessment of their future optimistic. In the light of that, there is a prospect for the development of circular economy concept in Serbia

Supplementary data for article:Trmčić, M.; Matović, R. V.; Tovilović, G.; Ristic, B. Z.; Trajković, V. S.; Ferjančić, Z.; Saičić, R. A Novel C,D-Spirolactone Analogue of Paclitaxel: Autophagy Instead of Apoptosis as a Previously Unknown Mechanism of Cytotoxic Action for Taxoids. Organic and Biomolecular Chemistry 2012, 10 (25), 4933–4942. https://doi.org/10.1039/c2ob25514f

Supplementary material for: [https://doi.org/10.1039/c2ob25514f]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/1304