Phenolic compounds and biological activity of Capsicum annuum L.

The objective of this study was to evaluate antifungal and antioxidant activities of vegetable extracts (Capsicum annuum L. cv. Dora, cv. Strizanka, cv. Morava), grown in Serbia. Different experimental models have included the determination content of total phenolics, total flavonoids, antioxidant capacity and minimum inhibitory concentration of the extract. The phenolic composition of different extracts was determined by the high-performance liquid chromatography (HPLC) method. The highest amounts of phenols and highest antioxidant capacity were found in the cultivar Dora extracts. The highest phenolic content has been shown in cultivar Strizanka ethanol extract. All of the extracts showed strong antimicrobial activity. On the basis of the results obtained, the extracts were found to serve as a potential source of natural antioxidants and antimicrobial due to their marked activity. The obtained results may be useful in the evaluation of new dietary and food products.Key words: High-performance liquid chromatography (HPLC), phenolic components, antimicrobial activity, antioxidant activity

Genotoksični efekat metanolskog ekstrakta biljke Cotinus Coggygria Scop. kod Drosophila Melanogaster

Plant extracts that appear to have favorable properties, may contain chemical compounds with mutagenic, teratogenic and/or carcinogenic activity, and it is of great importance to the inclusion of genotoxic approaches to toxicological evaluation of plant extracts. Using a comet assay on eukaryotic model organism Drosophila melanogaster in in vivo condition, potential genotoxic activity of the methanol extract of plant Cotinus coggygria Scop. was determined. Treatment with the methanol extracts, at a concentration of 1%, caused no significant changes compared to the negative control. Based on the distribution of comet class and selected quantitative parameters (% DNA in tail and tail length) it can be concluded that a methanol extract obtained from C. coggygria at a concentration of 1% does not shows genotoxic activity.Uključivanje genotoksičnog pristupa u toksikološku evaluaciju biljnih ekstrakata, koji i pored povoljnih svojstava mogu da sadrže komponente sa mutagenim, teratogenim i/ili kancerogenim aktivnostima, je od velike važnosti. Primenom Komet testa kod eukariotskog model organizma Drosophila melanogaster u in vivo uslovima ispitivana je genotoksična aktivnost metanolskog ekstrakta biljke Cotinus coggygria Scop. Тretman sa ekstraktom u koncentraciji od 1% nije uzrokovao statistički značajne promene u odnosu na negativnu kontrolu. Na osnovu raspodela komet klasa i odabranih kvantitativnih parametara može se zaključiti da ekstrakt biljke C. coggygria ne pokazuje genotoksičnu aktivnost

Optimizacija parametara tehničkih rešenja za mašinsko branje koštičavog i jagodičastog voća

Mechanical harvest of fruit, primarly stone and berry fruit is desired task toward posibbility defect of product which is in contact with limbs, part of machines as well as when fruit fall on the ground. In this paper is shown technology-tehnical solution for harvest of sherries, plums and raspberry. It is analysed specifics in harvest and shown results tweak products in oscilation stalk of fruit. It is shown technology – technical solution for mechanical harvest of raspberry.Mašinko branje voća, prvenstveno koštićavog i jagodičastog voća pretstavlja zahtevan zadatak zbog mogućeg oštećenja plodova pri kontaktu plodova sa granama, delovima mašine (uredjaja), kao i pri padu na podlogu. U radu su prikazana tehnološlko tehnička rešenja za branje višanja, šliva i malina. Analizirane su specifičnosti pri branju i dati prikazi i rezultati otkidanja plodova pri oscilovanju nosečih struktura plodova. Prikazana su i razmatrana tehnološko tehnička rešenja pri mašinskom branju malina

Stanje, mogućnosti i perspektive oplemenjivačkih progarma krastavaca (Cucumis Sativus L.) u Srbiji

Climatic conditions provide growing cucumbers Serbia as an open field and in greenhouses. Growing in greenhouses makes it possible to fruits of cucumber from domestic production on the market for almost the entire year. This capability dramatically increases the economic efficiency and thereby directly encouraged producers to cultivation of this plant species. Markets directly affected the characteristics of the fruit cucumbers that will be desired. This trend breeding companies must follow in order to offer farmers varieties that corresponds to preferences market. Also, farmers want high yield. The yield of cucumber is directly dependent on the expression of sex type plants.Klimatski uslovi Srbije omogućavaju gajenje krastavaca kako na otvorenom polju, tako i u zaštićenom prostoru. Gajenje u zaštićenom prostoru omogućava da se plodovi krastavca iz domaće proizvodnje mogu naći na tržištu skoro tokom celo godine. Ova mogućnost drastično povećava njegovu ekonomsku profitabilnost a time direktno podstiče prozvođače na gajenje ove biljne vrste. Tržišta direktno utiču na karakteristike krastavaca koje će bit cenjene. Ovaj trend oplemenjivačke kompanije morju pratiti kako bi proizvođačima ponudile sortiment koji odgovara željama kupaca. Takođe, proizvođači zahtevaju i visok prinos. Prinos kod krastavca direktno zavisi od tipa polne ekspresije biljaka

Criteria Selection for the Assessment of Serbian Lignites Tendency to Form Deposits on Power Boilers Heat Transfer Surfaces

Based on investigations of ash deposit formation, semi-empirical indicators for slagging and fouling, based on ash chemical composition and its fusion temperature, have been determined These criteria-indicators, in suggested limits, describe the coals on which they are based (North-American and British) well. However, the experience in the thermal power production sector of Serbia shows that their literal application to domestic coals does not produce satisfactory results. This contribution provides an analysis of applicability and the choice of criteria that are suitable for Serbian coals. The focus of the contribution is on coal slagging indicators, since slagging has much heavier consequences on heat transfer inside the steam boiler, and on boiler operation as a whole. The basis for the analysis of chosen criteria comprises of the results of investigations of four coalfields - Kostolac, Kolubara, Kosovo (Serbia), and Ugljevik (Bosnia and Herzegovina)

Karakteristike proizvodnje semena povrća u Srbiji

Seed production in the Republic of Serbia is a very important sector of agriculture. This production is taking place in public and private sector. Although seed production in Serbia can meet domestic demands, a certain amount of seed is being imported. Unfortunately, some vegetable producers (except for organic, dynamic or bio production) use a certain amount of vegetable seeds from their own mercantile production. Crops produced from such seed generate low yields due to poor seed quality (varietal impurity, low germination) and health. The study covered four years (2007-2010) and the surfaces under the vegetable crops aimed for seed production: 2007 (956 ha of seed produced in Serbia of which 64.9 ha produced by the Institute for Vegetable crops); 2008 (1152 in Serbia, 137 ha the Institute); 2009 (1219 ha in Serbia, 242.1 ha the Institute); 2010 (976 ha in Serbia, 198.7 the Institute).Proizvodnja semena je veoma bitna sa aspekta održivosti poljoprivrede jedne zemlje. U današnjoj eri sekvencioniranja, mapiranja i nadasve zaštite istraženih sekvenci, ovakve tendencije predstavljaju mogućnost za objektivnu zavisnost od istraživača (vlasnika) koji su odredili pojedine sekvence odgovorne za nasleđivanje pojedinih - traženih osobina novoselekcionisanih sorata. Posebno poglavlje ove problematike predstavljaju i GMO organizmi i njihova prezentacija širokoj proizvodnoj praksi kroz novonastale selekcije. U Republici Srbiji nije dozvoljena upotreba GMO selekcija ali smo svesni da se vrši pritisak na izmenu pozitivnih propisa i dozvolu širenja upotrebe ovih organizama. Semenarstvo Republike Srbije je veoma značajna grana poljoprivredne proizvodnje kojom se u državu slivaju velike količine novca od prodaje semena domaćih selekcija. Povrtarstvo je samo jedan mali segment ove proizvodnje, ali veoma bitan, kako za domaće proizvođače –farmere koji se sve podložniji svetskim trendovima nastupa na organizovanim tržištima a koji zahtevaju određene karakteristike gajenih sorti, tako i za konzumente povrća. Ovi zahtevi savremenog tržišta najčešće su u suprotnosti sa kvalitetom. Današnje semenarstvo Srbije se odvija u državnom i privatnom sektoru. Iako proizvodnja semena može podmiriti domaće potrebe, izvesna količina semena se nabavlja uvozom. Ovaj uvoz je postojao i u vreme zatvorenog tržišta SFRJ, te su smenske kompanije navikle na tržišnu utakmicu. Problem, a iskazala ga je i Evropska Unija svojim zakonima, jeste da jedan deo povrtara, osim za organsku (dinamičku, bio i dr proizvodnju), koriste određene količine semena povrća iz sopstvene merkantilne proizvodnje. Ovakvi usevi ostvaruju niske prinose kako zbog kvaliteta semena (sortna čistoća, klijavost), tako i zbog zdravstvene ispravnosti semena Sortiment povrća koji nastaje u Republici Srbiji stvaran je u agroekološkim uslovima Balkanskog poluostrva te je zato i našlo je tržište širom Balkana, a u poslednje vreme, i Evrope. Cilj ovog rada je da se iskaže učešće u proizvodnji pojedinih povrtarskih vrsta izraženo po površinama i u količinama Instituta za povrtarstvo d.o.o u semenarskoj proizvodnji Srbije. Istraživani ciklus je obuhvatao 4 godine i u njemu je proizvedeno seme povrća na 956 ha 2007 (64.9 ha), 1152 (137) 2008. godine, 1219 ha (242.1ha) 2009. godine i 976 ha (198.7 ha) 2010. godine

Izbor genotipova paradajza na tolerantnost prema suši

Screening collections aimed to make the selection of genotypes tolerant to drought in the vegetative stage of intensive growth of plants, which would start the program selection to obtain recombinant genotypes according to the abiotic factor. The criteria for screening were the diversity of genotypes for the number of sheets of the first flower branches and number of flower branches into the optimal mode of irrigation regime and reduced by 40 % . On the basis of the analysis genotypes: the number of leaves to the first floral branch G 106, 114, 121 and 122 ( 0 % ), and genotype G102, 114, and 125 for the characteristic number of lateral branches.Paradajz je široko prilagođen različitim podnebljima gajenja, međutim, njegov rast i razviće je prilično osetljiv na različite uslove spoljne sredine, uključujući salinitet, sušu, vlagu, ekstremne temperature, mineralne toksičnosti, kao i zagađenje životne sredine. Postoji ograničenje genetske varijacije za abiotičku toleranciju na stres u okviru kultivisanih vrsta i većina komercijalnih sorti se smatraju umereno do veoma osetljive na različite vrste stresa. Ispitivanje je izvršeno na 11 genotipa paradajza poreklom iz populacije domaćih i odomaćenih genotipova prikupljenih iz Srbije, a pripadaju kolekciji paradajza Instituta za povrtarstvo u Smederevskoj Palanci. Skrining kolekcije imao je za cilj da se izvrši izbor genotipova tolerantnih na sušu u vegetativnoj fazi intenzivnog porasta biljaka, čime bi se započeo program selekcije na dobijanje rekombinovanih genotipova prema ovom abiotskom faktoru. Kriterijumi za skrining bili su divergentnost genotipova za broj listova do prve cvetne grane i broj cvetnih grana u: optimalnom režimu navodnjavanja i redukovanom režimu za 40%. Na osnovu izvedenih analiza izdvojeni su genotipovi: za broj listova do prve cvetne grane G 106, 114, 121 i 122 (0%), kao i genotipovi G102, 114, i 125 za osobinu broja bočnih grana koji će predstavljati bazu za dobijanje rekombinovanih genotipova i početak selekcije na otpornost na sušu

Morfološke i hemijske analize novih linija pastrnka (Pastinaca sativa L.) Instituta za povrtarstvo

In Serbia, a parsnip is often grown vegetable gardens and the gardens, grown for thickened roots that is used in spice who spravljanu delicious dishes. This paper presents the results of 12 new genotypes breeding - line parsnip Institute of Vegetable Crops Palanka. Their morphological and chemical characteristics were compared with the standard variety Panonski smooth. In the three-year period from 2009 - of 2012 were analyzed by the following morphological characteristics: the average root weight, the average weight of leaf, root collar diameter , the diameter of the root environment and the emergence of secondary roots. Is determined by the chemical analysis of the dry matter , the total minerals , total sugars , and water. The aim was to examine the quality of new lines parsnip than the standard variety Panonski smooth and select the new lines for the recognition of new varieties of parsnip Institute of Vegetable Crops.Pastrnak (Pastinaca sativa L.) pripada familiji Apiaceae, po svojim prehrambenim i lekovitim svojstvima spada u red najvrednijih povrtarskih kultura. U Srbiji pastrnak je često gajeno povrće po okućnicama i baštama,gaji se radi zadebljalog korena koji se koristi ko začin pri spravljanu ukusnih jela. Koristan je za zdravlje jer poboljšava apetit, pospešuje rad bubrega,deluje na smanjenje krvnog pritiska. U radu su prikazani rezultati ispitivanja 12 novo selekconisanih genotipova- linija pastrnka Instituta za povrtarstvo Palanka. Njihove morfološke i hemijske osobine upoređene su sa standardnom sortom Panonski glatki. U trogodišnjem periodu od 2009 – 2012.godine analizirane su sledeće morfološke osobine: prosečna masa korena, prosečna masa lista, prečnik vrata korena, prečnik sredine korena i pojava sekundarnih korenova. Hemijskom analizom određena je suva materija, ukupni minerali, ukupni šećeri i voda. Cilj je bio da se ispita kvalitet novo stvorenih linija pastrnka u odnosu na standarnu sortu Panonski glatki i odaberu nove linije za priznavanje novih sorti pastrnka Instituta za Povrtarstvo

Upgrade Evaluation of Traffic Signal Assets: High-resolution Performance Measurement Framework

Agencies that have large-scale traffic signal systems under their purview often have to face asset upgrade decisions. As one of the most advanced traffic control technologies, Adaptive Traffic Control Systems (ATCS) are among the options that must be taken into consideration. Having in mind the complexity of benefits and costs stemming from ATCS investments, there is a need for information-rich performance measures (PM) used in the evaluation and decision-making. However, individual PMs are often not suitable for evaluating the multidimensionality of ATCS operations, due the inherent variability of ATCS control parameters. To expand the range of PMs used in ATCS evaluation, this research develops a new PM, i.e., average arrivals on green ratio, and proposes a refinement of average delay PM to account for queue formation. The paper also presents an application framework for a multi-criteria analysis, assuming a combination of the proposed and existing PMs. In addition to presenting the analytical PM formulation, the evaluation methodology uses microsimulation for a case study comparison between actuated-coordinated and ATCS operations. The results include a comparison between previous and proposed PMs, based on the processed simulation data as well as field data. In conclusion, the proposed PMs have a high transferability potential, low data collection cost, and high data quality, thus being suitable for use in decision processes for signal asset investment. Finally, this research opens up further opportunities for advancing decision-support methods for traffic operations asset management.Peer reviewe