Propagacija vibracija na zemunskoj strani mosta Zemun-Borča

Zbornik radova Građevinskog fakultet

Volatile Components from Old Plum Brandies

Gas chromatography and GC/MS methods were used to detect volatile components of three home-made natural old plum brandy samples and one sample of industrially-produced plum brandy. Gas chromatography and gas chromatography-mass spectrometric analysis of this extracts led to the identification of 99 components, including 46 esters, 7 hydrocarbons (alkanes and alkenes), 3 aldehydes, 9 alcohols, 1 lactone, 1 ketone, 8 acetals, 14 terpenes, 8 acids and 2 phenols. Ethyl esters of C8–C18 acids were the most abundant in all samples. In addition, the content of methanol, ethanol and higher alcohols C3–C5 was determined

Volatile Components from Old Plum Brandies

Gas chromatography and GC/MS methods were used to detect volatile components of three home-made natural old plum brandy samples and one sample of industrially-produced plum brandy. Gas chromatography and gas chromatography-mass spectrometric analysis of this extracts led to the identification of 99 components, including 46 esters, 7 hydrocarbons (alkanes and alkenes), 3 aldehydes, 9 alcohols, 1 lactone, 1 ketone, 8 acetals, 14 terpenes, 8 acids and 2 phenols. Ethyl esters of C8–C18 acids were the most abundant in all samples. In addition, the content of methanol, ethanol and higher alcohols C3–C5 was determined

Supplementary data for article: Andelkovic, B.; Vujisić, L. V.; Vučković, I. M.; Tešević, V.; Vajs, V.; Godevac, D. Metabolomics Study of Populus Type Propolis. Journal of Pharmaceutical and Biomedical Analysis 2017, 135, 217–226. https://doi.org/10.1016/j.jpba.2016.12.003

Supplementary material for: [https://doi.org/10.1016/j.jpba.2016.12.003]Related to published version: [http://cherry.chem.bg.ac.rs/handle/123456789/2386]Related to accepted version: [http://cherry.chem.bg.ac.rs/handle/123456789/3017

Composition and antimicrobial activity of the essential oil from Galatella linosyris (L.) Rchb. f. (Asteraceae)

An investigation of the chemical composition and antimicrobial activity of the essential oil of Galatella linosyris is presented. The chemical analysis (GC/MS, NMR) showed that sabinene (40 %), β-pinene (35.5 %), α-pinene (4.5 %), limonene (4 %), γ-muurolene (4 %), and (E)-caryophyllene (3.3 %) were dominant components in this oil. Microdilution assays were used to evaluate the minimum inhibitory concentration (MIC) and the minimum bactericidal/ fungicidal concentrations (MBC/MFC). G. linosyris essential oil exhibited better antibacterial activity against some of the tested bacteria than antifungal activity.U ovom radu je prikazano ispitivanje hemijskog sastava i antimikrobne aktivnosti etarskog ulja biljne vrste Galatella linosyris. Hemijskom analizom (GC-MS i NMR) je utvrđeno da su glavni sastojci ovog etarskog ulja sabinen (40 %), β-pinen (35,5 %) , α-pinen (4,5 %), limonen (4 %), γ-muurolen (4 %) i (E)-kariofilen (3,3 %). Za procenu minimalne inhibitorne koncentracije (MIC) i minimalne baktericidne/fungicidne koncentracije (MBC/ /MFC) korišćeni su testovi mikrorazblaženja. Etarsko ulje G. linosyris je pokazalo bolju antibakterijsku nego antifungalnu aktivnost.Projekat ministarstva br. 173032, br. 173029 and br. 17205

Geofizička istraživanja tonjenja lesa u Zemunu

Istražni prostor obuhvata periferni deo Zemunskog lesnog platoa, koji čini značajni deo Zemuna. U prirodnim uslovima teren je okarakterisan kao stabilan, ali se usled prodora veće količine vode u tlo, naročito u dužem vremenskom periodu ili sa većim hidrauličkim pritiskom vode, mogu očekivati naknadna diferencijalna sleganja i deformacije prašinasto peskovitih lesnih naslaga. Usled kolapsa lesnog tla u Novogradskoj ulici u Zemunu, potpuno se urušio jedan prizemni stambeni objekat, oštećenja na dečjem obdaništu su bila tolika da je morao biti srušen, za dva veoma oštećena objekta su projektovane sanacione mere, a deformacije su registrovane na još 10 stambenih objekata, kao i na samoj saobraćajnici. Istraživano područje obuhvata 0,8 ha urbanog područja, gde su registrovane prsline, pukotine i ulegnuća na površini terena koja ukazuju na nejednako sleganje i tonjenje tla i pojavu procesa mehaničke sufozije u centralnom delu istražnog područja. Cilj geofizičkih istraživanja je bio da se registruju potencijalna prisustva podzemnih prostorija, tj. laguma, kao i degradiranih zona sa slabijim fizičko-mehaničkim svojstvima, koje su pretpostavljeni uzrok nestabilnosti tla i oštećenja stambenih objekata. Korišćena je refraktivna seizmometrijska metoda duž dva profila, pri čemu je akvizicija podataka vršena instrumentom RAS-24. Pozicije profila i njihove dužine su odabrane tako da se obuhvati i stabilna i nestabilna zona. Procena stabilnosti navednih zona vršena je na osnovu evidentiranja nastalih oštećenja na objektima u široj zoni profila. Obrada i modelovanje na osnovu podataka dobijenih terenskim merenjima postupkom seizmometrijske refrakcije, izvedene su programskim paketima RAS-24 (System Software i Rayfract), dok je optimizacija i vizuelizacija izvedena programskim paketom Golden Software (Surfer & Grapher). Za oba merena profila generisani su 2D modeli distribucije brzina longitudinalnih seizmoakustičkih talasa, u domenu konačnih elemenata. Analizom dobijenih 2D modela može se zaključiti da duž dva izvedena profila ne postoje indicije o postojanju većih zona smanjenja brzine primarnih talasa (Vp) koje su karakteristične za prisustvo šupljina, odnosno laguma. Međutim, moguće je uočiti razlike u distribuciji Vp na profilima. Na jednom od profila, koji je pozicioniran na strani ulice gde je dokumentovano i vizuelno uočljivo sleganje objekata, pojavljuje se veća debljina sredine sa smanjenom brzinom Vp. Navedeno može ukazivati na prisustvo zone sa izmenjenim i slabijim fizičko-mehaničkim svojstvima tla. Za potvrdu takvih pretpostavki neophodno je izvesti dodatna geotehnička i inženjersko-geološka ispitivanja.Ovaj rad finansiran je po „Ugovoru o realizaciji i finansiranju naučnoistraživačkog rada NIO u 2022. godini“, br. 451-03-68/2022-14/ 200126

Kvalitet semena italijanskog ljulja različite ploidnosti

Three cultivars (domestic K-13 diploid and K-29 tetraploid, and introduced Tetraflorum tetraploid) were investigated in two years' trials, with and without spring Pi-fertilizing. The results of this investigation showed that the high quality of Italian ryegrass seed could be achieved with two cuttings in the first production year. Spring M-application did not influence TSW (thousand seed weight), germination rate and total germination. The produced seed from the first harvest cut was of an excellent quality, with high germination rate (K-13 - 79%, K-29 - 88% and Tetraflorum - 87%) and total germination (K-13 - 91%, K-29 - 96% and Tetraflorum - 93%). The difference in TSW was obtained between diploid and tetraploids (in the average 2,81 gr in proportion to 4,56 and 4,84 gr). The seed produced from the second harvest cut had lower germination and TSW.Ispitivane su tri sorte italijanskog ljulja, domaći diploid K-13 i tetraploid K-29, kao i uvozni tetraploid Tetraflorum, preko kvaliteta semena prve proizvodne godine iz dva žetvena otkosa. Prihrana azotom od 50 kg ha-1 nije uticala na masu 1000 semena, energiju klijanja i ukupnu klijavost. U prvom otkosu je dobijeno seme visoke energije klijanja i ukupne klijavosti (K-13 sa 79% energije klijanja i 91% ukupnom klijavošću, K-29 sa 88 i 96% i Tetraflorum sa 87 i 93%), a razlike u masi su ustanovljene između diploidnih i tetraploidnih sorti (prosečno 2,81 gr prema 4,56 i 4,84 gr), što je očekivano. Seme dobijeno drugom žetvom pokazalo je manju klijavost i masu 1000 semena

3D approach in airport location studies

The article presents the use of advanced 3D techniques in airport location studies. Though specific to the airports only, the activities such as runway orientation and control of obstacles, could be supported by CAD tools originally developed for road design and ground remodeling. All these techniques are based on triangulated 3D models: triangulated models of the obstacle limitation surfaces and the TIN terrain model. Terrain protrusions through the obstacle limitation surfaces are tested by using relatively small subset of options used in ground remodeling. The extent of these protrusions is measured by using complex tools for volumetric analyses. “Shadow” terrain profiles in the airport approach zones are created by using modified profiling tools coming from road design. All these procedures are demonstrated on a relatively small and compact airport project located in the mountainous region of the Balkans

Uticaj prihrane azotom na kvalitet suve materije italijanskog ljulja gajenog na različitom vegetacionom prostoru

The Italian ryegrass forage quality was investigated by means of crude protein and fibre content. The Italian ryegrass was produced at the first cut of the first production year. Interrow spacing did not have any statistical significance for protein and fibre content. The protein content decreased by increasing seeding rate from 5 to 20 kg ha-1, in average from 159,8 to 144,5 g kg-1, and increased by increasing amount of N fertilizer from control to 150 kg ha-1 in average 133 - 169 g kg"1. Fibre content did not have statistical significance, i.e. it had lower variation. There is a negative correlation between the protein and fibre content (P lt 0,05), but lower correspondence r= -0,23. Earlier cutting of Italian ryegrass had more important influence on fibre content, because when heading starts, crude fibre content is increased.Ispitivana je krmna vrednost italijanskog ljulja proizvedenog u prvoj godini i prvom otkosu, preko količine sirovih proteina i celuloze. Vegetacioni prostor je formiran različitim kombinacijama međurednog rastojanja i količine semena, uz prihranu azotom u proleće. Hemijskim analizama prosečnih uzoraka je utvrđeno da je količina proteina opadala sa povećanjem setvene norme od 5 do 20 kg ha-1 u proseku od 159,8 do 144,5 g kg-1, a rasla sa povećanjem količine N od kontrole do 150 kg ha-1 u proseku 133 do 169 g kg-1. Za sirovu celulozu nije uočena statistička značajnost razlika, tj. uočavao se suprotan efekat količine semena i N nego kod proteina, ali sa manjim variranjem. Između količine proteina i celuloze postoji negativna zavisnost, ali sa malom korelativnom povezanošću (r= -0,23)

Prinos, kvalitet i indeks ishrane azotom livade tipa Agrostietum capillaris pod uticajem đubrenja

Managing N, P and K inputs in semi-natural meadow production systems is important for achieving maximum yields in livestock farming. The objective of the present study was to estimate the effect of different NPK levels (N0P0K0, N50P50K50, N100P50K50, N100P100K100, N150P100K100 and N200P150K150 kg ha-1 yr-1) on the yield, quality and nitrogen nutrition index (NNI) in a grassland community of Agrostietum capillaris (semi-natural meadow) in western Serbia. The study was conducted during the seasons of 2005-2008. The values of the investigated parameters, except for the unit N uptake, were the highest in 2004/2005 due to favorable climate conditions. The levels of nitrogen significantly increased all of the studied parameters compared to the control treatment, except for unit N uptake. Mineral fertilizers at N200P150K150 provided the highest green forage yield (25.12 t ha-1), dry matter yield (8.12 t ha-1), crude protein yield (876.3 kg ha-1), nitrogen uptake (140.2 kg ha-1) and nitrogen nutrition index (70.2%), and the lowest unit N uptake (0.0022 kg N kg DMY-1). The use of mineral fertilizers increased green forage yield, dry matter yield and crude protein yield, increasing fertilizer from lowest to highest rate increased fresh and dry matter yield, as well as protein yield. Based on the results of the study, monitoring of nutrition indices would be necessary in order to increase productivity and economic benefits.Unošenje N, P i K inputa u poluprirodnim livadama je vaţno za postizanje maksimalnih prinosa na stočarskim farmama. Cilj ove studije bio je procena uticaja različitih nivoa N, P i K (N0P0K0, N50P50K50, N100P50K50, N100P100K100, N150P100K100 and N200P150K150 kg ha-1 yr-1) na prinos, kvalitet i indeks ishrane azotom (NNI) u livadskoj zajednici Agrostietum capillaris (poluprirodna livada) u zapadnoj Srbiji. Studija je sprovedena tokom perioda 2005-2008. Vrednosti ispitivanih parametara, izuzev usvajanja azota po jedinici mase, bile su najviše u 2004/2005 zbog povoljnih klimatskih uslova. Nivoi azota su značajno povećali sve ispitivane parametre u poređenju sa kontrolnim tretmanom, osim usvajanja azota po jedinici mase. Đubrenje sa N200P150K150 obezbedilo je najveći prinos zelene krme (25.12 t ha-1), prinos suve materije (8.12 t ha-1), prinos sirovih proteina (876.3 kg ha-1), usvajanje azota (140,2 kg ha-1) i indeks ishrane azotom (70,2%), kao i najmanji unos azota (0,0022 kg N kg PSM-1). Upotreba mineralnih đubriva povećala je prinos zelene krme, prinos suve materije i prinos sirovih proteina, povećavanjem đubriva od najmanje do najveće količine je povećalo prinos sveže i suve mase, kao i prinos proteina. Na osnovu rezultata studije, praćenje indeksa ishrane azotom bi bilo neophodna mera u cilju porasta produktivnosti i ekonomske efikasnosti