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    Wyświetlanie 1-8 z 8
    Tytuł:
    Trapetum natantis Muller et Gors 1960 in hydromeliorative facilities in Serbia
    Autorzy:
    Dzigurski, D.
    Ljevnaic-Masic, B.
    Nikolic, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/59034.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    Trapetum natantis association
    Trapa natans
    hydrophyte
    red list
    endangered species
    water property
    Serbia
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2013, 82, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The effects of physical-chemical water parameters on the Nymphaeion alliance development in northwestern Serbia
    Autorzy:
    Dzigurski, D.
    Ljevnaic-Masic, B.
    Nikolic, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/59239.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    physicochemical parameter
    water parameter
    Nymphaeion alliance
    development
    Nymphaeetum albae
    Nymphaeetum albo-luteae stand
    Nymphoidetum peltatae
    Trapetum natantis association
    phytocoenosis
    Serbia
    Opis:
    Nymphaeion alliance vegetation is dominant floating-leaved vegetation in the Danube–Tisza–Danube hydrosystem in northwestern Serbia and comprises Nymphaeetum albae, Nymphaeetum albo-luteae, Nymphoidetum peltatae and Trapetum natantis associations. Comparative analysis of physical-chemical water parameters on localities where these – in most parts of Europe endangered and vulnerable stands – develop showed that most phytocenoses are associated with specific habitat conditions. Of the analyzed water properties, the factors that cause Nymphaeion alliance phytocenoses differentiation are primarily pH, alkalinity and COD-MnO4. Formation of the Nymphaeetum albae stands is significantly associated with the highest values of pH, COD-MnO4 and alkalinity, and the lowest nitrate, nitrite, dissolved and the total phosphorus content values, in comparison to the other studied associations. Nymphoidetum peltatae stands develop in waters characterized by the lowest pH and COD-MnO4, low alkalinity, and the highest nitrate and nitrite values in relation to the other analyzed phytocenoses. Trapetum natantis stands, on the other hand, prefer the warmer sections of the canal network, neutral pH, and the highest values of BOD5, dissolved and total phosphorus. Habitat conditions in which Nymphaeetum albo-luteae stands develop are of the widest range in comparison to other investigated phytocenoses.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2014, 83, 2
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vegetation of the classes Stellarietea mediae and Agropyretea repentis in the vineyards of Bosnia and Herzegovina
    Autorzy:
    Kovačević, Z.
    Nikolić, L.
    Nikolić-Đorić, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/11855265.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    This paper shows the results of many years researches of the weed vegetation of vineyards in western Balkan which includes eight associations: Panico-Galinsogetum parviflorae Tüxen et Becker 1942, PanicoPortulacetum oleraceae Lozanovski 1962, Cynodono-Sorghetum halepensae (Laban 1974) Kojić 1979, Amarantho-Fumarietum Tüxen 1955, Diplotaxietum muralis Kovačević 2013, Convolvulo-Polygonetum aviculare Kovačević 2014, Erigerono-Setarietum glaucae Šumatić 1997 and Convolvulo-Agropyretum repentis Felföldy 1943. By projecting the plant communities on the main components (Principal Component Analysis) and comparing them to the ecological indices (variables), it shows that Cynodono-Sorghetum halepensae and Diplotaxietum muralis are similar according to their humidity (F) and temperature (T) requirements and Cynodono-Sorghetum halepensae and Diplotaxietum muralis are similar according to their chemical reaction of the soil (R). Amarantho-Fumarietum and Erigerono-Setarietum glaucae are the similar according to their demands for the light (L).
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2017, 16, 1; 163-181
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of cultural practices on weeds community in function of potato yield
    Wplyw praktyk uprawowych na zbiorowisko chwastów w plonie ziemniaka
    Autorzy:
    Ilić, O.
    Nikolić, L.
    Ilin, Ž.
    Mišković, A.
    Vujasinović, V.
    Kukić, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/11543510.pdf
    Data publikacji:
    2016
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    In the paper are presented results of three years studies performed in the period 2008–2010 on effects of cultural practices in stands of Panico-Galinsogetum Tx. et Beck. 1942. association in conventional potato production on the experimental plots in the vicinity of Becej (Northern Serbia). Composition of association Panico-Galinsogetum in experimental control variant builds 31 weed species. From Panico-Galinsogetum community, in the variant with one cultivation (with earthing up) without herbicide applying was found 22 weed species, and at the variant with two cultivation without herbicide 17 weed species, respectively. Herbicide treatments of potato crops as well as cultivation led to significant impoverishment of the weed flora, i.e., reduction in number of weed species, their coverage value, as well as the degree of presence in potato crop. Due to reduction of weed infestation, in variants untreated by herbicides, by application of two cultivations, achieved potato yield was for 8% higher in comparison to the variant with one cultivation. In variants treated by herbicides, potato yield was for 32% higher in relation to the yield on untreated experimental variants. The average number of tubers per plant achieved in variants treated by herbicides was for 40% higher in comparison to the number of tubers in untreated variants. In both cases, in comparison to control variant, cultivation resulted in significantly higher number of tubers per plant.
    Praca przedstawia rezultaty trzech badań przeprowadzonych w latach 2008–2010 i dotyczących wpływu praktyk uprawowych na stanowiskach Panico-Galinsogetum Tx. et Beck. 1942 w konwencjonalnej produkcji ziemniaka na poletkach doświadczalnych w pobliżu Becej (Północna Serbia). Skład Panico-Galinsogetum w wariancie kontroli doświadczenia obejmował 31 gatunków chwastów. W wariancie z jednym zabiegiem (z przysypywaniem ziemią) bez herbicydu znaleziono 22 gatunki chwastów z Panico-Galinsogetum, a w wariancie z dwoma zabiegami bez herbicydu stwierdzono 17 gatunków. Zastosowanie herbicydów w uprawie ziemniaka doprowadziło do znacznego zubożenia flory chwastów, tzn. do redukcji liczby chwastów, ich wartości rozprzestrzeniania się oraz obecności w uprawie ziemniaka. Dzięki zmniejszeniu zachwaszczenia w wariantach bez herbicydów zastosowanie dwóch zabiegów doprowadziło do plonu ziemniaka o 8% większego w porównaniu z wariantem z jednym zabiegiem. W wariantach z herbicydami plon ziemniaka był o 32% większy w porównaniu z plonem w wariantach bez zabiegów. Średnia liczba bulw na roślinę w wariantach z herbicydami była o 40% większa w porównaniu z liczbą bulw w wariantach bez zabiegów. W obydwu przypadkach zabieg dał istotnie większą liczbę bulw na roślinę w porównaniu z kontrolą.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2016, 15, 5; 31-43
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Education in the field of fire protection and emergency rescue in higher education school in Novi Sad, Serbia
    Autorzy:
    Nikolic, B.
    Karabasil, D.
    Ruzic-Dimitrijevic, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/136974.pdf
    Data publikacji:
    2011
    Wydawca:
    Szkoła Główna Służby Pożarniczej
    Opis:
    The valuation of past experience and the survey of needs and staff currently in the service dealing with protection in emergency situations give rather dissonant tones that are in collision with the general security of citizens in Serbia. VTŠ has been actively involved in the protection of Serbia’s population from the discussed types of risk because we have realized that modern protection requires an integrated approach in order to be implemented properly. 1. Through the analysis of activities of the rescuer within any rescue measure the existence of high-level risks can be observed. Numerous measures that can be applied cannot significantly reduce the risk. Experience shows that the basic measure is the training of the rescuer. Therefore, in the educational process there should be two directions of engagement, in particular: a) Establishment of programmes with as much practical work as possible to gain practical experience; and b) Such programmes with practical content require suitable conditions, i.e. space or training grounds for practicing. 2. There is a significant issue at the second (specialist) study level – how much time or credits are necessary to achieve quality education. The law specifies from 60 to 120 credits, or 1–2 years. Hence, this is the framework within which we should look for an answer. From the above, it can be concluded that a detailed analysis of plans and programmes as well as their harmonization with real state and needs is necessary. Other plans and programmes in the area of protection which the School has accredited and the possibility of further development must not be forgotten. It is likely that there are possibilities of creating new study programmes in the field of protection within the overall protection system in Serbia.
    Źródło:
    Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej; 2011, 42; 196-206
    0239-5223
    Pojawia się w:
    Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    THE INFLUENCE OF EXCIPIENTS ON STABILITY OF VISCOUS EYE DROPS WITH DEXPANTHENOL IN PHARMACEUTICAL PRACTICE
    Autorzy:
    Savić, Vesna L.
    Živković, Jelena
    Stanković, Milica I.
    Antunović, Mirjana
    Basić, Zorica
    Nikolić, Ivana
    Powiązania:
    https://bibliotekanauki.pl/articles/895405.pdf
    Data publikacji:
    2019-10-30
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    dexpanthenol (DXP)
    eye drops
    viscosity
    Carbopol® 940
    stability
    Opis:
    Conventional eye drops exhibit weak bioavailability due to the unique physiology and anatomy of the eye. In order to increase eye drops viscosity, different concentrations of Carbopol® 940 (0.08% and 0.20%) were used. The aim of the study was to indicate the advantages and examine the influence of preservatives and the concentrations of viscosity increasing agents on the quality of magistral viscous eye drops with dexpanthenol (DXP). The quality of the prepared formulations was tested using physico-chemical methods and biological tests. pH Value measurement was done by the potentiometric method). Viscosity measurements of the samples were performed according to Ph. Eur. 9.0. DXP content was determined by reversed-phase high-pressure liquid chromatography. Sterility testing was performed using direct sample inoculation. The results indicate that pH values of eye drops with preservatives are lower than pH values of preservative-free formulations. All formulations have recovery values that meet the requirements of the European Pharmacopoeia. The DXP content in preservative-free eye drops increased slightly during testing, unlike the DXP content in eye drops with preservatives. The formulations remained sterile during 45 days after preparation, stored at room temperature, protected from light. DXP viscous eye drops may be prepared in pharmaceutical practice using the proposed viscosity increasing agent (Carbopol® 940) and preparation procedure. All formulations express stability for 45 days after preparation. Preservative-free DXP eye drops with Carbopol® 940 concentrations of 0.08% and 0.20% show maximal stability, provide an optimal concentration of DXP (3.0%), and therefore have an advantage in pharmaceutical practice.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 5; 845-853
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Review of the Hard-Facing Technology Application for Reparation of the Given Parts in Various Branches of Industry
    Autorzy:
    Lazić, V.
    Arsić, D.
    Mutavdžić, M.
    Nikolić, R.
    Meško, J.
    Radović, L.
    Ilić, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/2064968.pdf
    Data publikacji:
    2018
    Wydawca:
    STE GROUP
    Tematy:
    regeneration
    hard-facing
    friction
    wear
    machine parts
    Opis:
    This paper deals with the problem of defining the optimal procedure for reparation of the machine parts of large dimensions and complex shapes. The procedure consists of establishing the causes of the part's damages, definition of the reparation technology, with selection of its parameters and ways of execution. The reparation is done by hard-facing, with heat treatment that consists of preheating, additional heating and the post hard-facing tempering. The process parameters' selection includes choosing the right filler metal(s), ways and order of depositing the hard-faced layers, ways of reaching and maintaining the preheating temperatures, checking of the base metal's chemical composition and mechanical properties and deciding on the post-process heat and mechanical processing of the executed hard-facing. The executed reparation of the forging hammer's mallet, presented in details, serves as an example how the reparation can successfully serve as a substitute for procuring the new part and thus producing the savings both directly in lower costs and indirectly in shortening the down-time of the damaged part operation.
    Źródło:
    Multidisciplinary Aspects of Production Engineering; 2018, 1, 1; 279--285
    2545-2827
    Pojawia się w:
    Multidisciplinary Aspects of Production Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    THE EFFECTS OF SULFUR-CONTAINING COMPOUNDS ON REDOX STATUS IN HOMOCYSTEINE-TREATED RATS
    Autorzy:
    Sobot, Tanja S.
    Zivkovic, Vladimir I.
    Srejovic, Ivan M.
    Jeremic, Jovana N.
    Nikolic Turnic, Tamara R.
    Ponorac, Nenad D.
    Petkovic, Anica M.
    Jakovljevic, Vladimir L.
    Djuric, Dragan M.
    Powiązania:
    https://bibliotekanauki.pl/articles/895260.pdf
    Data publikacji:
    2019-02-28
    Wydawca:
    Polskie Towarzystwo Farmaceutyczne
    Tematy:
    oxidative stress
    homocysteine
    N-acetylcysteine
    L-cysteine
    L-methionine
    sulfur amino acids
    Opis:
    There is growing interest in the activity of sulfur-containing compounds on redox balance in physiological and pathological conditions, considering that some of these compounds have not only antioxidative but also pro-oxidative activities. Aim of this study was to assess possible differences in the effects of various sulfur-containing compounds on redox balance of cardiovascular system in its physiological state and in the early onset of hyperhomocysteinemia. This experimental study divided Wistar albino rats into two groups: saline-treated (control) and DL-homocysteine-treated (experimental group). Rats from experimental group were subjected to subchronic subcutaneous administration of DL-homocysteine at dose of 0.45 μmol/g body weight twice a day for 2 weeks. At the end of this period, rats were sacrificed, and blood samples were collected to be analysed for homocysteine concentration and systemic oxidative stress. Isolated rat hearts were excised and attached to the Langendorff apparatus. To assess the effects of acute administration of L-methionine, L-cysteine, N-acetylcysteine, and sodium hydrogen sulfide, the hearts were perfused individually with each of the mentioned substances at same single dose of 0.5 mmol/l for 5 min. In collected samples of coronary venous effluent oxidative stress biomarkers were determined using spectrophotometry. Total homocysteine level was significantly higher in the experimental group than in the control group, and the effects of applied sulfur-containing compounds were significantly different in experimental and control groups. DL-homocysteine induced considerable changes in functioning of cardiovascular system even before an increase in plasma homocysteine values, and action of sulfur-containing compounds varied depending on the presence of homocysteine.
    Źródło:
    Acta Poloniae Pharmaceutica - Drug Research; 2019, 76, 1; 147-157
    0001-6837
    2353-5288
    Pojawia się w:
    Acta Poloniae Pharmaceutica - Drug Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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