CaSA NaRA
Not a member yet
2090 research outputs found
Sort by
Karakterizacija i antibiotska osetljivost koagulaza-negativnih stafilokoka iz Zlatiborske pršute
Get PDFKoagulaza negativne stafilokoke u procesu fermentacije svinjske pršute utiču na formiranje ukusa, mirisa, i boje, i na taj način formiraju vrhunski kvalitet. Materijal za ovo ispitivanje činila su 3 uzorka pršute, koji su uzeti iz tri domaćinstva sa područija Zlatibora.
Cilj ovog istraživanja je izolacija i preliminarna kategorizacija koagulaza negativnih stafilokoka sa posebnim akcentom na pojavu rezistencije na komercijalne antibiotike.
Preliminarno su izdefinisane četiri grupe stafilokoka, od kojih dominira Staphylococcus xylosus (37,5%), zatim Staphylococcus carnosus koji je izolovan u nešto manjem procentu iz pršute od 20,83%, Staphylococcus equorum 31,25%, i Staphylococcus epidermidis u nižem procentu (8,33%). Dva izolata su pokazala rezistenciju na antibiotike.Coagulase-negative staphylococci participating in the fermentation process of pork prosciutto affect the creation of taste, smell and color and in that way give the product top quality.
The material for this study consisted of 3 samples of prosciutto taken from three households in Zlatibor area.
The aim of this research was isolation and preliminary categorization of coagulase-negative staphylococci with special emphasis on the emergence of resistance to commercial antibiotics.
Four groups of Staphylococcus were preliminary identified , of which Staphylococcus xylosus (37.5%) dominated, followed by Staphylococcus carnosus which was isolated from prosciutto in a somewhat smaller percentage of 20.83% Staphylococcus equorum 31.25%, and Staphylococcus epidermidis in a lower percentage (8.33%). Two strains showed resistance to antibiotics
Senzorni kvalitet fermentisanih kobasica sa dodatkom lanenog ulja tokom skladištenja
Get PDFThe study examined the impact of the replacement of backfat with linseed oil on the sensory characteristics of fermented sausages. The oil was added as alginate gel and as emulsion with soy protein isolate. The content of the oil replacing backfat was around 5%, 7% and 9% of the batter. Increase the oil content and the manner of preparation did not influence the appearance and surface color. As for cut appearance, color, odor and taste grades declined progressively with the increase in the oil content. During storage, changes were mostly of the same intensity as in control. Content of linseed oil higher than 5% can negatively impact the acceptability of fermented sausages.U ovom ogledu ispitivan je uticaj zamene čvrstog masnog tkiva (ČMT) lanenim uljem na senzorna svojstva fermentisanih kobasica. Ulje je dodato kao alginatni gel i kao emulzija sa izolatom proteina soje. ČTM je zamenjen tako da u nadevu sadržaj ulja bude oko 5%, 7% i 9%. Povećanje zamenjenog dela ČMT-a i način pripreme generano nisu uticali na izgled na preseku i boju površine. Međutim, u pogledu izgleda na preseku, boje na preseku, mirisa i ukusa ocene su sa povećanjem sadržaja ulja progresivno bile manje. Tokom skladištenja promene uglavnom nisu bile većeg intnziteta od kontrole. Veći sadržaj lanenog ulja od 5% u nadevu feremnisanih kobasica može negativno da utiče njihovu prihvatljivost
Ispitivanje kvaliteta trupova mladih bikova prema standardima EU
Get PDFThe quality of the carcassеs has been the subject of interest, for both primary production and meat industry. The classification of carcasses is conducted immediately after veterinary examination and weight of carcasses. This study examines the quality of 42 young cattle carcasses slaughtered in a slaughterhouse in Raška district, according to the standard (SEUROP) that is applied in EU countries but has not yet been applied in Serbia. Based on the estimated value and classification in class of the carcasses, it is possible to provide appropriate financial compensation to producers ie. owners of animals and thus stimulate them to produce the best quality animals for slaughter.Kvalitet trupova zaklanih životinja je predmet interesovanja, kako primarne proizvodnje, tako i industrije mesa. Postupak klasiranja trupova odnosno pulutki sprovodi se u klanicama neposredno nakon veterinarskog pregleda i utvrđivanja mase trupa. U radu je ispitan kvalitet 42 trupa junadi, zaklanih u jednoj klanici u Raškom okrugu, prema standardu koji se primenjuje u zemljama Evropske Unije (SEUROP), a koji se još ne primenjuje u Srbiji. Nа osnovu procenjene vrednosti trupovа zаklаnih životinjа i rаzvrstаvаnjа u klаse, moguće je izvršiti odgovаrаjuću novčаnu nаdoknаdu proizvođаčima tj. vlаsnicima životinjа i na taj način ih stimulisati da proizvode što kvalitetnije životinje za klanje
Specificnosti organske ratarske proizvodnje
Get PDFKurs je namenjen nastavnicima zaposlenim u srednjim školama iz podrucja rada
poljoprivreda, proizvodnja i prerada hrane kako bi se omogucilo kontinuirano i permanentno
usavršavanje, razvijanje kompentencija, pracenje i implementacija novih znanja iz navedenih
oblasti. Proizvodnja ratarskih biljaka predstavlja osnov organske poljoprivrede u proizvodnji
zdravstveno bezbedne i visokovredne hrane i preduslov organskoj stocarskoj proizvodnji. U
sistemu održivog upravljanja poljoprivrednom proizvodnjom organsko ratarstvo se odlikuje
nizom specificnosti formulisanih u metodama organske biljne proizvodnje, cija je
implementacija obavezna i neophodna za obavljanje ovih aktivnosti. Svrha kursa je da
polaznicima dopuni znanja iz oblasti proizvodnje ratarskih biljaka i ukaže na posebnosti i
zahteve u sistemu organske proizvodnje. To se pre svega odnosi na ocuvanje i unapredenje
prirodnih resursa, biodiverziteta, primenu adekvatnih tehnologija gajenja ratarskih biljaka
kroz podsticanje procesa samoregulacije u zaštiti životne sredine, konverziju iz drugih
poljoprivrednih sistema u ekološku proizvodnju, primenu principa dobrih praksi u
proizvodnji hrane. Pored doprinosa u proširivanju znanja o ratarskoj proizvodnji kurs treba da
doprinese sticanju kompetencija nastavnika u transferu znanja poljoprivrednih škola u okviru
predmeta o organskoj proizvodnji
Bioregulators Application in Promoting Fruit Quality and Postharvest Maintaining
No full textBioregulatori mogu dati značajan doprinos poboljšanju kvaliteta ploda i
produžavanju mogućnosti skladištenja. Značajni ciljevi u ogledima sa bioregulatorima u
Istraživačkom centru Haidegg (Grac, Austrija), u poslednjim godinama bili su ispitivanje
njihovog uticaja na smanjivanje rasta, sprečavanje alternativne rodnosti, poboljšanje kvaliteta
ploda (boja, krupnoća, unutrašnji kvalitet) i produžavanje mogućnosti skladištenja plodova.
Upotreba bioregulatora u konceptu integralne proizvodnje ne može otkloniti ozbiljne greške u
proizvodnji voćaka kao što su pogrešan izbor lokacije, podloge i sorte, loš sadni materijal,
neodgovarajuća rezidba, neredovna zaštita voćaka, pogrešan termin berbe itd. Dozvola za
upotrebu aktivne materije 1-metilciklopropen (1-MCP), posle uvođenja CA tehnologije u
proizvodnju šezdesetih godina, je bila prekretnica u austrijskoj tehnologiji hlađenja.
Poboljšanje čvrstoće, osnovne boje i sadržaja kiselina omogućava ponudu plodova sa boljim
ukusom, naravno ako je berba izvedena u optimalnom terminu za sortu. Plodovi sorti koje su
sklone brzom smanjivanju čvrstoće plodova (Elstar, Rubinette, Jonagold) mogu se sa
uspehom skladištiti duže vreme. Kod sorti koje su posebno osetljive na posmeđivanje
pokožice (Granny Smith i Crveni delišes) kroz upotrebu 1-MPC proizvodnja ponovo
doživljava renesansu uzimajući u obzir da u Austriji u plodovima posle skladištenja ne sme
biti ostataka (rezidua) preparata. Pored mogućnosti kvalitetne proizvodnje, proizvodači u
Austriji sa 1-MCP imaju na raspolaganju preparat, sa kojem mogu minimizirati gubitke u
kvalitetu plodova u skladištu i produžiti skladišnu sposobnost.Bioregulators can make a significant contribution to improving fruit quality
and extending the cold storage. Important goals in trials with bioregulators at
Research Center Haidegg (Graz, Austria), in recent years have been testing their
effects on the reduction of growth, preventing alternative bearing, improve fruit
quality (color, size, internal quality) and extension of cold storage of fruits. Use of
bioregulators in the concept of integrated production can not remove serious errors in
the fruit production, such as the wrong choice of location, rootstocks and cultivars,
poor planting material, improper pruning, irregular protection of fruit trees, the
wrong dates of picking, etc. Permission to use the active ingredient 1-
methylcyclopropene (1-MCP), after the introduction of CA technology in the
production of the sixties, was a milestone in Austrian cooling technology. Improving
the firmness, ground color and acidity allow to offer fruits with better taste, of
course, if the harvest was performed at the optimum time for cultivar. Fruits of
cultivars that are prone to rapid reduction of flesh firmness (Elstar, Rubinette,
Jonagold) can be successfully stored for a long time. For cultivars that are
particularly prone to skin browning (Granny Smith and Red Delicious) through the
use of 1-MPC production again experiences a renaissance, taking into account that in
Austria the fruits after storage must not contain residues of chemicals. Besides the
possibility of high-quality production, producers in Austria with 1-MCP have access
to chemical which can minimize losses in fruit quality in storage and extend the
storage capacity
Prinos i kvalitet klonova sorte Kaberne Sovinjon u Niškom rejonu
Get PDFIn terms of Nis regions in 2009-2010. The questioned the yield and quality of grape clones of Cabernet Sauvignon (clon 169) and (clone 685). Between tests ruled favorable conditions for the expression of biological and technological properties of the tested clones. Yields of grapes and its variation by years show high and stable fertility tested clones. Most of sugar content varied from 19.95% to 20.05% in the examined clones, while the variety of the standard achieved slightly higher sugar content (23%). Total acid ranged from 7.6g/l to 8.9 g/l. Test results confirm the importance of growing clones of Cabernet Sauvignon in conditions of low wine-growing region.U radu se prikazuju rezultati ispitivanja klonova sorte Kaberne Sovinjon (klon 169 i klon 685) koji su dobijeni iz Francuske u cilju ispitivanja i eventualne valorizacije za uslove našeg vinogradarstva. U uslovima niškog vinogradarskog rejona ispitivani klonovi su ispoljili značajne razlike u ostvarenom prinosu i kvalitetu grožđa, što ukazuje na njihov različiti biološki potencijal rodnosti
Population Dynamic of Z Strain of European Corn Borer in Bečej,Vojvodina Province
No full textWordwide in maize fileds, the three different pheromone strains (Z, E, H) of European corn borer (ECB) are identified. The aim of the study was to investigate the presence of ECB pheromon strains in Vojvodina province, leading production area of maize in Serbia. In three years, the presence of different strains were verified. Population dynamic according to obtained data idicate high differences in population strenght. The occurance of this pest in the field fluctuates. The earliest cach was on June 2nd (2016) and the latest on July 17th (2014). In 2015, when the highest temperature and the lowest humidity were registerd, the first ECB specimen was caught on June 23rd. The last catch of moths was earlier in vegatation on August 20th (2014) and the latest on October 9th (2016). In 2015 the last catch was on September 10th
Chemical Profile and Antioxidant Activity of Helianthus Tuberosus
Get PDFHelianthus tuberosus L., commonly known as the Jerusalem artichoke, belongs to Helianthus genus and Asteraceae botanical family. Due to its wide range of biological activities, aim of this study was to investigate chemical profile of extracts obtained using different approaches: maceration, percolation, infusion and Soxhlet extraction. Extracts were further investigated regarding heavy metal, saccharides, total phenolics and total flavonoids contents, as well as antioxidant activity using DPPH assay. Obtained results showed presence of all investigated species, as well as significant capability of prepared extract to scavenge DPPH radicals
Uticaj doze ozona i UV zračenja na potencijalnu toksičnost podzemne vode nakon O3/UV unapređenog oksidacionog procesa
Get PDFIn this study the impact of ozonation and advanced O3/UV oxidation process on the general toxicity of the groundwater was examined by using the Allium anaphase-telophase test. Investigated oxidation treatments lead to increasing the toxicity of groundwater in comparison to raw water. Ozonation process lead to increasing of toxicity mostly as a consequence of bromate formation. On the other hand O3/UV process lead to increasing of toxicity as a result of formation of brominated organic by-products.U ovom radu ispitivan je uticaj tretmana vode ozonom i primene unapređenog O3/UV procesa na opštu toksičnost podzemne vode primenom Allium anafazno-telofaznog testa. Ispitivani oksidacioni tretmani dovode do povećanja toksičnosti podzemne vode u odnosu na sirovu vodu. Proces ozonizacije dovodi do povećanja toksičnosti vode najvećim delom kao rezultat formiranja bromata. S druge strane, primena O3/UV procesa dovodi do povećanja toksičnosti vode kao rezultat formiranja bromovanih organskih nusproizvoda
Antibakterijska aktivnost različitih ekstrakata Helianthus Tuberosus L.
Get PDFThe aim of our study was to compare the antibacterial activity of extracts of Helianthus tuberosus L. obtained with polar (methanol) and non-polar (petroleum ether) solvents.
The greatest antibacterial activity was expressed by methanolic extract against bacterium Salmonella Typhimurium ATCC 14028 and Escherichia coli ATCC 25922. Petroleum-ether extracts exhibited the greatest antibacterial activity against Salmonella Typhimurium ATCC 14028. The lowest antimicrobial activity was expressed by an extract obtained by petroleum-ether against Listeria monocytogenes ATCC 19112.
The results indicate that a stronger antibacterial activity showed extract obtained with polar solvent.Cilj našeg istraživanja je poređenje antibakterijske aktivnosti ekstrakata Helianthus tuberosus L. dobijenim polarnim (metanol) i nepolarnim (petrol-etar) rastvaračima.
Najjaču antibakterijsku aktivnost ispoljio je metanolski ekstrakt u odnosu na bakteriju Salmonella Typhimurium ATCC 14028 i Escherichia coli ATCC 25922. Petrol-etarski ekstrakt ispoljio je najjaču antibakterijsku aktivnost u odnosu na Salmonella Typhimurium ATCC 14028. Najslabiju antibakterijsku aktivnost ispoljio je dobijen petrol-etarski ekstrakt u odnosu na Listeria monocytogenes ATCC 19112.
Rezultati ukazuju da je jaču antibakterijsku aktivnost ispoljio ekstrakt dobijen polarnim rastvaračem