Ishikawa iterative process for strongly pseudocontractive operators in arbitrary Banach spaces

In this note we give a correction to the main result of Zhou in [14] on the convergence of the Ishikawa iteration process to a unique fixed point of a strongly pseudocontractive operator in arbitrary real Banach spaces. Our results extend the recent result of Soltuz [11] to arbitrary strongly pseudocontractive operators

Portals of Morava Serbia churches

Интересовање за архитектонски украс портала, њихову иконографију и значење одавно је присутно у медиевистици. За разлику од подробно испитаних романичких и готичких портала разматраних у бројним прегледима и опсежним студијама, литература о позновизантијским порталима као и порталима цркава Моравске Србије мањег је обима. Углавном су портали у историографији византијске уметности помињани узгредно, у монографским анализама и прегледима уметности византијског света. Портали цркава Моравске Србије међусобно се разликују по техничким одликма, положају, димензијама, начину клесања и изведеном архитектонском украсу. Уз формалне анализе којима историја уметности као идиографска дисциплина располаже, уочавање, формулисање и проницање у проблеме испитивања у вези са њиховом рецепцијом могу се пронаћи у форми трагања за досадашњим интерпретацијама у којима се уочавају различите олазне позиције интерпретатора и идејног контекста у којем су портали настали. Имајући у виду различите византијске текстове могуће је установити са колико минуциозности и прецизности се описују број, позиција, осветљење портала, као и одређене ритуално-култне радње у вези са порталима. Будући да је исихазам свеприсутан у монашком животу и генерално духоввној клими друге половине четрнаестог столећа, врата и акт Преображења поседују дубоко симболичку функцију. Тако се ствара целина путем које се посредују вишеслојна значења проистекла из семантичког садејства клесаног и сликаног украса. Постајући визуелна форма разматра се vii не само у међусобном односу са посланицом Ефежанима 2: 11 – 22 већ и како је материјалност експлицитно саопштавана у илустровању појединих библијских цитата. Циљ ствараоца портала је да га означи као физички објект и нагласи значај прелаза. Све приказане слике уз портал представљају nexus за визуелизацију древних библијских цитата. Подсећајући не само на древне библијске метафоре Христа као угаоног камена и главе Цркве који држи зидове храма скупа, већ и метафоре ,,Ја сам врата. Ко уђе кроза ме, спашће се“ (Јн. 10, 9) отварају се нове интерпретативне могућности за тумачење портала цркава Моравске Србије, као и могућности разрешења значења појединих просторних јединица храма.Interests for the architectural decoration of the portals, their iconography and meaning have long been present in medieval studies. Unlike thoroughly surveyed Romanesque and Gothic portals which were discussed in numerous extensive studies, literature on the late Byzantine portals and the portals of Morava Serbia churches are smaller volume. Portals of Morava Serbia churches differ from each other by technical characteristics, position, size, method of cutting and executed architectural decoration. In addition to the formal analysis which art history as a discipline as ideograph discipline, identification, formulation and insights into the problems of testing in relation to their reception can be found in the form of a search for previous interpretations in which the observed different starting positions performers and conceptual context in which portals are created. Bearing in mind the various Byzantine texts can be detected with much minuteness and precision describes the number, position, brightness portal, as well as certain ritual - cultic acts in conjunction with portals. Since hesychasm was ubiquitous in the monastic life and general spiritual climate of the second half of the 14th century, the door and act of Transfiguration have deep symbolic function. This creates a whole that is mediated through a multi-layered meanings arising from the interaction of semantic carved and painted decoration. Becoming a visual form, portals are considered not only in relation to Ephesians 2: 11-22 but materiality explicitly stated numerous Biblical metaphors. The purpose of the portal is to mark it as a physical object and emphasize the importance of the crossing. All displayed images with the portal are the nexus for the visualization. Recalling not only the Biblical metaphor of Christ as the cornerstone and the head ix of the Church, which holds the walls together, but also a metaphor “I am the door. Whoever enters through me will be saved" (John 10, 9) opens up new interpretive possibilities for the interpretation of the portals of Moravia Serbia, and the possibility of resolving the meaning of individual spatial units of temple

Allergen labelling in meat, dairy and cereal products from the Serbian market

Allergens in food are a great health risk, because of the ratio of severity of problems compared to small amounts of ingested allergen. Since 2014, Serbian producers and importers of food have been obliged to declare allergens from the list of Codex Alimentarius on the product packaging. Surveillance of different meat, diary, and cereal product took place in 2016, with aim of checking if the Serbian regulatory requirements for labelling of allergens in food are being fulfilled. Out of 68 different meat products, 20 were not labelled for allergens. Thirty-six labels of various dairy products were examined revealing that allergen information was included on 27 of them. Only one of eight examined cereal products did not have allergen labelling

Element concentration and fatty acid composition of Serbian bee bread

The element concentration (Cu, Fe, Zn, Mn, Cr, Co, Ni, Se, K, Na, Ca and Mg), heavy metal concentration (Cd, Hg, Pb and As) and fatty acid composition of 12 Serbian bee bread samples from different geographical origins were examined. The element concentration was examined using ICP-MS, and total lipids for fatty acid determination were extracted from homogenized bee bread samples with hexane/isopropanol mixture by accelerated solvent extraction. Potassium was the major element, ranging between 5515 +/- 361.20 mg/kg and 7487 +/- 381.50 mg/kg. The highest As and Pb concentrations were found in bee breads from Lazarevac. This bee bread also contained the highest level of PUFA and SFA. Also, the n-6/n-3 ratio ranged between 0.86 +/- 0.28 and 1.40 +/- 0.05, indicating bee bread can be a good source of unsaturated fatty acids. Bee bread could be useful in monitoring environmental contamination by heavy metals (Cd, Hg, Pb and As), although complex studies of all bee products give sufficient information on this topic

The nitrite content in domestic and foreign cooked sausages from the Serbian market

The nitrite content (expressed as NaNO2) was measured in 236 samples of different types of domestic and foreign cooked sausages from the Serbian market, according to standard ISO procedure. The highest content of nitrite (expressed as NaNO2) was found in fine comminuted cooked sausages from foreign producers. Similarly, the coarse comminuted cooked sausages from foreign producers contained higher nitrite compared to domestically produced cooked sausages. According to National and EU Regulations, the maximum allowed nitrate content (expressed as NaNO2) is 150 mg/kg. All tested cooked sausages had nitrite levels below the regulatory limits set by National Regulation and Regulation (EC) No. 601/2014, but the highest nitrite contents were found in cooked sausages from foreign producers

Trace elements and heavy metals in multifloral honeys from Serbia

This study was to determine the contents and any correlations of As, Cu, Zn, Fe, Cd and Pb in multifloral honeys. Honey, among other bee products, is a good bioindicator since it can reveal the connections between soil, plants and honeybees. Ninety-two samples of multifloral honey were collected from the retail market during the 2018 vegetation season and analyzed to determine mineral content. Analysis of the elements was performed by inductively coupled plasma mass spectrometry (ICP-MS). The most abundant element was Fe, with average concentration of 2.21 +/- 1.00 mg/kg, followed by Zn, Cu, Pb, As and Cd. The results obtained show positive correlations: Zn-As, Fe-As, Fe-Cu, Fe-Cd, Cd-Cu and Cd-Pb. Negative correlations are noticeable between Pb and all other minerals except Cd

Efikasnost primene preparata na bazi zeolita u obrocima jagnjadi u tovu

The paper presents the results of a research on the impact of products based on natural zeolite on the production results of fattening lambs. The experiment involved two groups of lambs (the control - C and experimental - E groups), each consisting of 15 heads, for a period of 90 days. The meal was made from sheep milk, feed mixtures for fattening lambs and meadow hay. The test group lambs, unlike the ones from the control group, were given mixtures based on natural zeolite. Min-a-Zel S mixture (in the form of 25% composite) was fed to lambs from birth till their 14th day of life, directly into the mouth, once a day (before the morning feed), in the amount of 10 ml. Min-a-Zel Plus was given to them from their 15th day of life, together with the feed mixture (0.5%). Feeding was at will. The average weight of lambs at the end of the experiment, in accordance with the sequence of treatments (C:E) was 24.40:26.94 kg (P (lt) 0.01). Daily weight gain of lambs, during the experiment, was 229:256 g and in the experimental group it was by 27g or 11.79% higher (P (lt) 0.01). The test group lambs had a better utilization of dry matter, protein and energy, which justifies the use of products based on natural zeolite in fattening lambs.U radu su prikazani rezultati istraživanja o uticaju preparata na bazi prirodnog zeolita na proizvodne rezultate jagnjadi u tovu. Ogled je izveden na dve grupe jagnjadi (kontrolna - K i ogledna - O), po 20 jagnjadi u trajanju od 90 dana. Obrok se sastojao od ovčjeg mleka, krmne smeše za tov jagnjadi i livadskog sena. Iskorišćavanje preparata na bazi zeolita (Min-a-Zel S i Min-a-Zel Plus) pozitivno je uticalo na prirast, iskorišćavanje i efikasnost iskorišćavanja suve materije, proteina i energije. Prosečan dnevni prirast bio je veći kod jagnjadi ogledne grupe za 27 g ili 11,79 posto. Utrošak suve materije za kilogram prirasta u istoj gupi, bio je manji za 12,21 posto a proteina i energije za 10,58 posto. Manja učestalost javljanja proliva bila je kod jagnjadi ogledne gupe

Chemical characterization of Agaricus bohusii, antioxidant potential and antifungal preserving properties when incorporated in cream cheese

Agaricus bohusii Bon is an edible and prized mushroom especially common in Serbia and southern Europe. Herein, this species was chemically characterized by evaluation of nutritional value (e.g. macromolecules, free sugars and fatty acids), bioactive compounds (e.g. tocopherols, phenolic compounds and organic acids), and antioxidant activity of its methanolic extract (e.g. scavenging activity, reducing power and inhibition of lipid peroxidation). Its antifungal preserving properties were also evaluated after incorporation of A. bohusii extract in cream cheese, using fungus Penicillium verucosum var. cyclopium as source contaminant. Comparison of sensory evaluation of cream cheese alone and enriched with A. bohusii extract was recorded. According to our findings, A. bohusii was rich source of carbohydrates and proteins, containing γ-tocopherol as the only isoform of tocopherols. Polyunsaturated fatty acids also predominated over mono and unsaturated fatty acids. p-Hydroxybenzoic and p-coumaric acids were the phenolic acids identified in the studied sample; two related compounds were found in higher amounts: γ-L-glutaminyl-4-hydroxybenzene and cinnamic acid. Malic, oxalic and fumaric acids were the organic acids identified and quantified in A. bohusii. High concentration of total phenolics was in correlation with strong antioxidant capacity. Methanol extract successfully inhibited development of P. verucosum var. cyclopium in cream cheese, tested at room temperature after 7 days of inoculation. Sensory evaluation showed cream cheese in combination with A. bohusii extract slightly more acceptable to panelists than cream cheese alone

Effects of different culture conditions on biological potential and metabolites production in three Penicillium isolates

The genus Penicillium is well known for its importance in drug and food production. Certain species are produced on an industrial scale for the production of antibiotics (e.g. penicillin) or for insertion in food (e.g. cheese). In the present work, three Penicillium species, part of the natural mycobiota growing on various food products were selected– P. ochrochloron, P. funiculosum and P. verrucosum var. cyclopium. The objective of our study was to value these species from the point of view of production of bioactive metabolites. The species were obtained after inoculation and growth in Czapek and Malt media. Both mycelia and culture media were analyzed to monitor the production of different metabolites by each fungus and their release to the culture medium. The concentrations of sugars, organic acids, phenolic acids and tocopherols, were determined. Antioxidant activity of the phenolic extracts was evaluated, as also the antimicrobial activity of phenolic acids, organic acids and tocopherols extracts. Rhamnose, xylose, fructose and trehalose were found in all the mycelia and culture media; the prevailing organic acids were oxalic and fumaric acids, and protocatechuic and p-hydroxybenzoic acids were the most common phenolic acids; γ-tocopherol was the most abundant vitamin E isoform. Generally, the phenolic extracts corresponding to the mycelia samples revealed higher antioxidant activity. Concerning the antimicrobial activity there were some fluctuations, however all the studied species revealed activity against the tested strains. Therefore, the in vitro bioprocesses can be an alternative for the production of bioactive metabolites that can be used by pharmaceutical industry.The authors are grateful to Fundação para a Ciência e a Tecnologia (FCT, Portugal), COMPETE/QREN/EU for financial support to this work (bilateral cooperation action Portugal/Serbia 2011), to CIMO (strategic project PEst-OE/AGR/UI0690/2011), and to Serbian Ministry of Education and Science for financial support (grant number 173032). L. Barros also thanks FCT, POPH-QREN and FSE for her grant (SFRH/BPD/4609/2008)