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    Wyświetlanie 1-11 z 11
    Tytuł:
    Określenie optymalnej częstotliwości nacinania drzew sosnowych ze względu na opłacalność pozyskiwania żywicy
    The determination of the optimal frequency of pine tree chasing considering the economy of resin harvest
    Autorzy:
    Nikolic, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/812933.pdf
    Data publikacji:
    1969
    Wydawca:
    Polskie Towarzystwo Leśne
    Źródło:
    Sylwan; 1969, 113, 06
    0039-7660
    Pojawia się w:
    Sylwan
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The qualifier etn. in the Dictionary of Serbian language
    Kwalifikator etn. w Słowniku języka serbskiego
    Autorzy:
    Nikolić, Vesna S.
    Powiązania:
    https://bibliotekanauki.pl/articles/34655964.pdf
    Data publikacji:
    2023
    Wydawca:
    Akademia Humanistyczno-Ekonomiczna w Łodzi
    Tematy:
    Serbian language
    Serbian culture
    linguoculturology
    qualifier etn.
    Serbian tradition
    non-equivalent lexis
    język serbski
    kultura serbska
    tradycja serbska
    lingwokulturologia
    kwalifikator etn.
    egzotyzmy
    słownictwo nieekwiwalentne
    Opis:
    This paper represents the continuation of the research started within the article Linguo-cultural qualifiers in the Dictionary of Serbian language, where we have marked as linguo-cultural qualifiers the following dictionary markers: etn. (ethnology, ethnography), prazn. (superstition), mit. (mythology, mythological), ist. (history, historical), rlg. (religion, religious), teol. (theology, theological), crkv. (church), pravosl. (Orthodoxy, orthodox) and kat. (Catholic). On this occasion, we have chosen those lexemes which are marked by the qualifier etn. (ethnology, ethnography) in the Dictionary of Serbian language (2011), i.e. those which refer to Serbian folk life and customs, or to be more precise – names of holidays, customs, rituals, parts of folk clothes, popular games and similar, as most of these lexemes represent the so-called non-equivalent lexis and are usually problematic in terms of translating or learning Serbian as a foreign language, but at the same time enable learning about Serbian culture and tradition.
    Niniejsze opracowanie stanowi kontynuację badań, które zostały zapoczątkowane artykułem Kwalifikatory lingwokulturologiczne w Słowniku języka serbskiego. Kwalifikatorami lingwokulturologicznymi nazwaliśmy skróty słownikowe etn. (etnologia, etnografia), prazn. (przesąd), mit. (mitologia, mitologiczny), ist. (historia, historyczny), rlg. (religia, religijny), teol. (teologia, teologiczny), crkv. (kościół, kościelny), pravosl. (prawosławie, prawosławny) i kat. (katolicki). Przy tej okazji postanowiliśmy wyróżnić i zaprezentować leksemy, oznaczone w Słowniku języka serbskiego (2011) kwalifikatorem etn. (etnologia, etnografia), czyli te, które związane są z życiem i obyczajami narodowymi Serbów, a dokładniej – nazwy świąt narodowych, zwyczajów, obrzędów, części stroju narodowego, tańców narodowych i inne. Większość tych leksemów stanowi bowiem tak zwane słownictwo nieekwiwalentne i często stwarza problemy podczas tłumaczenia lub nauki języka serbskiego jako obcego, ale jednocześnie umożliwia zapoznanie się z serbską kulturą i tradycjami narodu serbskiego.
    Źródło:
    Językoznawstwo; 2023, 18, 1; 63-75
    1897-0389
    2391-5137
    Pojawia się w:
    Językoznawstwo
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laser Beam Profile Influence on Dark Hanle Resonances in Rb Vapor
    Autorzy:
    Krmpot, A.
    Ćuk, S.
    Nikolić, S.
    Radonjić, M.
    Grujić, Z.
    Jelenković, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1791239.pdf
    Data publikacji:
    2009-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    32.70.Jz
    42.50.Gy
    42.62.Fi
    32.30.Jc
    Opis:
    Influence of two different laser beam profiles, the Gaussian and the Π (top hat) profile on the resonance line widths and amplitudes in the Hanle electromagnetically induced transparency was studied. The laser beam propagates through the vacuum Rb glass cell. Studies were done at $D_1$ line for the open $\text{}^{87}Rb:$ $F_{g}$=2 → $F_{e}$=1 transition. Hanle electromagnetically induced transparency was measured for the two beam profiles with the same total power and beam diameter and experimental results showed that Gaussian and the top hat profiles give different amplitudes and widths of the Hanle resonances. Resonances obtained from the top hat laser beam profile have lower amplitudes and higher line widths.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 4; 563-565
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Multidisciplinary Approach to Teaching Metals as Part of the Elementary School Curriculum in Serbia
    Autorzy:
    Nikolić, Ružica S.
    Kostic, Danijela A.
    Krstic, Nenad S.
    Trajković, Aleksandar
    Stojanović, Nena
    Powiązania:
    https://bibliotekanauki.pl/articles/2031648.pdf
    Data publikacji:
    2014-06-30
    Wydawca:
    Wydawnictwo Adam Marszałek
    Tematy:
    teaching metals
    elementary school
    Opis:
    The multidisciplinary approach to the study of metals which we are proposing includes the modernization of the curricular content and its connection with everyday life. The use of additional teaching material in elementary schools in rural and urban areas in the wider region of the city of Niš has contributed to increased interest and activities on the part of the schoolchildren, which has in turn led to a significant quantitative improvement in their knowledge of chemistry in general, but also of metals in particular. All of the schoolchildren achieved a satisfactory level of knowledge (>50%) following the implementation of the expanded curriculum.
    Źródło:
    The New Educational Review; 2014, 36; 95-103
    1732-6729
    Pojawia się w:
    The New Educational Review
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Vitamin and mineral content in black currant (Ribes nigrum L.) fruits as affected by soil management system
    Autorzy:
    Paunović, S.M.
    Nikolić, M.
    Miletić, R.
    Mašković, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/11543572.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
    Opis:
    Black currant contain significant amounts of minerals and vitamins that are associated with an improved health status. The effect of three soil management system (bare fallow, sawdust mulch and black foil mulch) on the content of vitamins and minerals in the fruits of seven black currant cultivars (‘Ben Lomond’, ‘Ben Sarek’, ‘Titania’, ‘Čačanska Crna’, ‘Tisel’, ‘Tiben’ and ‘Tsema’) was analyzed. HPLC-DAD (high performance liquid chromatography-diode array detector) technique was used to define the vitamins A, B1, B2 and B3. Vitamin C were evaluated using a spectrometer, whereas the mineral content of the fruit was determined by flame atomic absorption spectrometry. Significant differences in the minerals and vitamins content were detected among the cultivars. The berries of black currants are rich in mineral composition, especially potassium, phosphours, sodium, calcium and magnesium as well as iron. Also, black currant is an important source of vitamin C and, to a lesser amount vitamins A and B3. Soil management systems showed highly significant differences in some the tested parameters. Black currants grown on black foil mulch gave the highest levels of K, P and Na, and those on sawdust mulch had a high content of vitamins C, A and B3. On the other hand, soil management system had no pronounced effect on the other vitamins and minerals analyzed. This study demonstrates degree of differences in the amount vitamins and mineral elements depending on the different soil management systems and climatic factors.
    Źródło:
    Acta Scientiarum Polonorum. Hortorum Cultus; 2017, 16, 5; 135-144
    1644-0692
    Pojawia się w:
    Acta Scientiarum Polonorum. Hortorum Cultus
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of load and reinforcement content on selected tribological properties of Al/SiC/Gr hybrid composites
    Autorzy:
    Veličković, S.
    Miladinović, S.
    Stojanović, B.
    Nikolić, R. R.
    Hadzima, B.
    Arsić, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/111714.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    aluminum alloy
    hybrid composites
    silicon carbide
    graphite
    particles
    stop aluminium
    węglik krzemu
    grafit
    kompozyty hybrydowe
    Opis:
    Hybrid materials with the metal matrix are important engineering materials due to their outstanding mechanical and tribological properties. Here are presented selected tribological properties of the hybrid composites with the matrix made of aluminum alloy and reinforced by the silicon carbide and graphite particles. The tribological characteristics of such materials are superior to characteristics of the matrix – the aluminum alloy, as well as to characteristics of the classical metal-matrix composites with a single reinforcing material. Those characteristics depend on the volume fractions of the reinforcing components, sizes of the reinforcing particles, as well as on the fabrication process of the hybrid composites. The considered tribological characteristics are the friction coefficient and the wear rate as functions of the load levels and the volume fractions of the graphite and the SiC particles. The wear rate increases with increase of the load and the Gr particles content and with reduction of the SiC particles content. The friction coefficient increases with the load, as well as with the SiC particles content increase.
    Źródło:
    Production Engineering Archives; 2018, 18; 18-23
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis and distributional patterns of the invasive flora in a protected mountain area - a case study of Medvednica Nature Park (Croatia)
    Autorzy:
    Vukovic, N.
    Bernardic, A.
    Nikolic, T.
    Hrsak, V.
    Plazibat, M.
    Jelaska, S.D.
    Powiązania:
    https://bibliotekanauki.pl/articles/56776.pdf
    Data publikacji:
    2010
    Wydawca:
    Polskie Towarzystwo Botaniczne
    Tematy:
    distribution pattern
    invasive flora
    flora
    protected area
    mountain area
    Medvednica Nature Park
    Croatia
    invasive plant
    alien plant
    dispersal strategy
    habitat
    regression
    Opis:
    In this paper we have analysed invasive flora of Medvednica Nature Park, Croatia with respect to their origins, life forms, systematic positions, types of seed dispersal, Ellenberg indicator values and spatial distributions using MTB 1/64 grid units for analyses. A total of 27 invasive plant species, belonging to 14 families, were recorded with Asteraceae being the most frequently occurring family. Therophytes were the most common life form, as is generally true of Croatian invasive plants; however, hemicryptophytes and geophytes were more frequent in Medvednica. Here, invasive plants originated mainly from both Americas with slightly lower portion in comparison to all Croatian invasive plants, while contrary was the case when comparing those originated from Asia. The most widespread species was Erigeron annuus (L.) Pers., and the species with the lowest occurrence were Chamomilla suaveolens (Pursh.) Rydb and Datura innoxia Mill. A multiple regression model explains 44% of the spatial variability in the invasive plants data per MTB 1/64 unit, using the number of all recorded plant species, the average elevation and the lengths of paths and roads as estimators. The latter two variables also had the most influence on the ordination axes in analyses of the spatial distribution of seed dispersal types present in each MTB 1/64 unit. Anemochory was the most frequent type of seed dispersal.
    Źródło:
    Acta Societatis Botanicorum Poloniae; 2010, 79, 4
    0001-6977
    2083-9480
    Pojawia się w:
    Acta Societatis Botanicorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reparation of damaged forging dies by hard facing (HF) technology
    Autorzy:
    Lazic, V.
    Arsic, D.
    Nikolic, R. R.
    Aleksandrovic, S.
    Milosavljevic, D.
    Djordjevic, M.
    Cukic, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/111606.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Menedżerów Jakości i Produkcji
    Tematy:
    forging dies
    hard facing (HF)
    filler metals (FM)
    hardness
    microstructure
    matryce kuźnicze
    napawanie
    spoiwa
    twardość
    mikrostruktura
    Opis:
    The forging dies are in exploitation exposed to elevated temperatures and variable impact loads, both compressive and shear. Steels for manufacturing of these tools must endure those loads while maintaining mechanical properties and being resistant to wear and thermal fatigue. For those reasons, the alloyed steels are used for making the forging dies, though they have less weldability, because alloying increases proneness to hardening. Any reparatory hard facing (HF) of the damaged dies would require the specially adjusted technology to the particular piece. In this paper reparatory hard facing of dies used for forging pieces in the automobile industry is considered. Prior to reparatory hard facing of the real tools, numerous experimental hard facings on models were performed. All the model hard facings were done on the same steels which were used for production of the real forging dies. To define the optimal hard facing technology one needs to derive the optimal combination of the adequate heat treatment(s), to select the proper filler metals and the welding procedure. The established optimal HF technology was applied to real forging dies whose service life was further monitored in conditions of exploitation.
    Źródło:
    Production Engineering Archives; 2015, 6, 1; 26-29
    2353-5156
    2353-7779
    Pojawia się w:
    Production Engineering Archives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of analytical and the FEM method for deriving the Mode I stress intensity factor of thin-walled beams containing a crack
    Autorzy:
    Djoković, J. M.
    Vulović, S. D.
    Nikolić, R. R.
    Živković, M. M.
    Bujnak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/131642.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Komisja Inżynierii Budowlanej PAN Oddział w Katowicach
    Tematy:
    cracked thin-walled beams
    modeI SIF
    cross-section warping
    FEM
    J-EDI
    belka cienkościenna
    współczynnik intensywności naprężeń
    MES
    Opis:
    The problem considered in this paper is of the cracked thin-walled beams. They are subjected to combined loading by the bending moment and the axial force. The profiles with the I (H), T and U cross-sections were analyzed. The analytical method is based on application of classical expressions for Mode I SIF of such beams with taking into account the cross sections' warping. The classical expressions for SIF for the thin plate are adapted by including the reduced forces and moments characteristic for the thin-walled beams. The numerical simulation for calculating the stress intensity factor of the cracked thin-walled beams consisted of application of the Finite Element Method (FEM) by use of the J-EDI method. It is found that the Mode I SIF of cracked thin-walled beams increases with crack length increase. The conducted comparison of results obtained by application of the two methods confirms the validity of the proposed analytical expressions only for the small crack lengths.
    Źródło:
    Roczniki Inżynierii Budowlanej; 2015, 15; 43-51
    1505-8425
    Pojawia się w:
    Roczniki Inżynierii Budowlanej
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Radon and thoron exhalation rate measurements from building materials used in Serbia
    Autorzy:
    Čeliković, Igor T.
    Pantelić, Gordana K.
    Živanović, Miloš Z.
    Vukanac, Ivana S.
    Krneta Nikolić, Jelena D.
    Kandić, Aleksandar B.
    Lončar, Boris B.
    Powiązania:
    https://bibliotekanauki.pl/articles/148848.pdf
    Data publikacji:
    2020
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    air exchange rate
    building materials
    radon exhalation rate
    Opis:
    The second most important source of indoor radon, after soil beneath dwelling, is building material. With the increase in environmental awareness and new energy-saving policies, residents tend to replace the existing windows with tighter windows, which leads to a decrease in air exchange rate and consequently an increase in indoor radon concentration. In case of low exchange rates, dose caused by inhalation of radon and its progeny can exceed external dose originating from the radium content in the surrounding building material. In this paper, surface exhalation rates of radon (222Rn) and thoron (220Rn) from typical building materials used for construction and interior decoration of houses in Serbia were investigated. Surface exhalation rate measurements were performed using the closed-chamber method, while concentrations of radon and thoron in the chamber were continuously measured using an active device, RTM1688-2, produced by SARAD® GmbH. Finally, the impact of the replacement of windows on the indoor radon concentration was estimated.
    Źródło:
    Nukleonika; 2020, 65, 2; 111-114
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    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 1-11 z 11

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