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    Wyświetlanie 1-9 z 9
    Tytuł:
    Methods for Preparing Spheroidal Particles of 3-Nitro- 1,2,4-triazol-5-one (NTO)
    Autorzy:
    Lasota, J.
    Chyłek, Z.
    Trzciński, W. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/358248.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    NTO
    recrystallization
    properties
    Opis:
    This paper presents an overview of methods for recrystallizing 3-nitro- 1,2,4-triazol-5-one (NTO), with particular emphasis on methods for obtaining spheroidal particles with low porosity. The effects of selected solvents and surfactants on the recrystallization results was checked. Products in the form of spheroidal particles were obtained for some selected solvent-surfactant systems. The bulk density, surface area, size distribution, and sensitivity to friction and impact were tested for the spherical NTO samples and thermal analysis was also performed.
    Źródło:
    Central European Journal of Energetic Materials; 2015, 12, 4; 769-783
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    NTO-based Melt-cast Insensitive Compositions
    Autorzy:
    Trzciński, W. A.
    Lasota, J.
    Chyłek, Z.
    Szala, M.
    Paszula, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/358929.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    NTO
    insensitive explosives
    melt-cast explosives
    Opis:
    This paper presents research on insensitive melt-cast explosive compositions based on 3-nitro-1,2,4-triazol-5-one (NTO) and containing TNT, wax, Al and RDX. The viscosity of the compositions in the operating temperature range was measured. Thermal analysis was performed as well as thermal stability and sensitivity to mechanical and thermal stimuli were tested. The detonation parameters were also determined. Finally, the acceleration ability (Gurney energy) and the JWL coefficients for the detonation products were established.
    Źródło:
    Central European Journal of Energetic Materials; 2016, 13, 3; 592-611
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study of the Detonation Properties, Propellant Impulses, Impact Sensitivities and Synthesis of Nitrated ANTA and NTO Derivatives
    Autorzy:
    Jensen, T. L.
    Moxnes, J. F.
    Kjønstad, E. F.
    Unneberg, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/358234.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    detonation properties
    propellant impulses
    DFT
    NTO
    ANT
    Opis:
    Nitrated derivatives of 5-amino-3-nitro-1,2,4-triazole (ANTA) and 3-nitro-1,2,4-triazol-5-one (NTO) were theoretically characterized with respect to their performance as high explosives and rocket propellants. The detonation velocity and the detonation pressure of the derivatives, calculated with EXPLO5 software, were at the same level or slightly above the performance of 1,3,5-trinitroperhydro-1,3,5-triazine (RDX). The results showed that compositions of 1,3,4-trinitro-1,2,4-triazol-5-one and glycidyl azide polymer (GAP) could give specific impulses just above 2600 m/s in rocket propellants. The sensitivities of the derivatives were evaluated using their heats of detonation, CHNO-ratios, free space in the crystal lattice and N−NO2 bond dissociation energy. The stability and sensitivity of several of the derivatives could be poor due to the low N−NO2 bond dissociation energies. The N−NO2 bond dissociation energies in the derivatives were calculated to be between 41 and 296 kJ/mol when the M06-2X/6-311+G(2d,p) functional was used. Synthetic routes for the most stable derivatives were proposed. In addition, preliminary studies of the chloride-assisted nitrolysis of NTO were performed. The infrared spectrum of the NTO derivative indicated that N−NO2 bonds were formed.
    Źródło:
    Central European Journal of Energetic Materials; 2016, 13, 2; 445-467
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Explosive Properties of 4,4’,5,5’-Tetranitro-2,2’-bi-1H-imidazole Dihydrate
    Autorzy:
    Lewczuk, R.
    Szala, M.
    Rećko, J.
    Cudziło, S.
    Klapötke, T. M.
    Trzciński, W. A.
    Szymańczyk, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/358061.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    TNBI dihydrate
    NTO
    explosives
    detonation properties
    thermal analysis
    Opis:
    This paper reports measured explosive properties of 4,4’,5,5’-tetranitro-2,2’-bi-1H-imidazole dihydrate (TNBI•2H2O). Non-isothermal kinetics analysis, calorimetric measurements, detonability tests, small-scale shock reactivity tests (SSRT), detonation velocity measurements and cylinder tests were performed. The results of the cylinder tests were used to determine the acceleration ability of TNBI•2H2O. Some experiments were conducted also with TNT, NTO, FOX-7 and RDX. Our experimental studies have shown that TNBI•2H2O is a thermodynamically stable compound, surpassing TNT with regard to its energetic and detonation parameters. The results of the SSRT indicate that this material has better performance in small charges than RDX, FOX-7 and NTO.
    Źródło:
    Central European Journal of Energetic Materials; 2016, 13, 3; 612-626
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assay of the Insensitive High Explosive 3-Nitro-1,2,4-triazol-5-one (NTO) by Acid-Base Titration
    Autorzy:
    Nandi, A. K.
    Singh, S. K.
    Kunjir, G. M.
    Singh, J.
    Mandal, A. K.
    Pandey, R. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/358351.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    NTO
    purity
    acid-base titration
    HPLC
    quality control
    Opis:
    The insensitive high explosive 3-nitro-1,2,4-triazol-5-one (NTO) is a weak acid (pKa 3.76) due to the labile N–H bond. The weakly acidic character of this compound is exploited for its assay by aqueous acid-base titration. The NTO sample was dissolved in water and the resultant solution was titrated against 0.07 N NaOH solution using phenolphthalein as indicator. Regular batch samples were assayed by this method and the results were compared with those obtained by the HPLC method. The aqueous acid-base titration method was found to be suitable for the quality control of the product.
    Źródło:
    Central European Journal of Energetic Materials; 2013, 10, 1; 113-122
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Melt-Cast Composition Based on NTO and FOX-7
    Autorzy:
    Belaada, A.
    Trzciński, W. A.
    Chyłek, Z.
    Szala, M.
    Paszula, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/358828.pdf
    Data publikacji:
    2016
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    NTO
    FOX-7
    low-sensitivity explosives
    melt-cast explosives
    Opis:
    A melt-cast composition containing NTO, FOX-7, TNT, Al and wax was prepared and tested. The viscosity of the melted composition was measured. Its sensitivity to impact, friction, shock wave and jet impact were determined, and its thermal stability and ignition temperature were established. Some detonation properties of the composition were investigated. The heat of detonation was measured using a calorimetric bomb. The detonation pressure and velocity were determined in a plate-dent test. The results of a cylinder test were used for the determination of the Gurney energy, the detonation pressure and energy, and the so-called effective exponent of the expansion isentrope and the JWL equation of state of the detonation products.
    Źródło:
    Central European Journal of Energetic Materials; 2016, 13, 4; 882-902
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studies on NTO-, FOX-7- and DNAN-based Melt Cast Formulations
    Autorzy:
    Mishra, V. S.
    Vadali, S. R.
    Bhagat, A. L.
    Garg, R. K.
    Kugaonkar, V. M.
    Raman, S.
    Sinha, R. K.
    Asthana, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/358500.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
    Tematy:
    melt cast
    DNAN
    TNT
    FOX-7
    NTO
    RDX/TNT
    VOD
    sensitivity
    Opis:
    In the present paper, 2,4-dinitroanisole (DNAN) has been evaluated as a melt cast explosive in comparison to the widely used 2,4,6-trinitrotoluene (TNT). The detonation failure diameter of a bare DNAN charge is greater than 100 mm and about 44 mm with 1.5 mm steel confinement. Comparative studies of two sets of formulations were carried out. The first set comprised formulations containing 60% of NTO, FOX-7, HMX or RDX and 40% of DNAN or TNT. The second set comprised formulations containing 30% of NTO, FOX-7, TATB or RDX and 70% of DNAN or TNT. The studies were mainly concentrated on characterization of the formulations, which included determination of the sensitivity parameters and the velocity of detonation (VOD). The study confirmed that DNAN and DNAN-based formulations are relatively insensitive compared to TNT and the analogous TNT-based formulations respectively. The rate of the detonation reaction of DNAN is enhanced in the presence of the high energy ingredients RDX, HMX, FOX-7 and NTO to varying degrees. The VODs of the FOX-7/TNT and RDX/TNT formulations match closely with the proportions of FOX-7 and RDX under study. The VOD and shock sensitivity of the FOX-7/DNAN formulations decrease rapidly compared to the RDX/DNAN formulations, with increases in the proportion of FOX-7 or RDX. The combinations of NTO with TNT, and NTO with DNAN, are more shock insensitive than TNT or DNAN alone. NTO-based compositions are more insensitive than FOX-7-based compositions.
    Źródło:
    Central European Journal of Energetic Materials; 2017, 14, 2; 403-417
    1733-7178
    Pojawia się w:
    Central European Journal of Energetic Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Branding as an essential element of the of destination management process using the example of selected states
    Autorzy:
    Marczak, Mirosław
    Powiązania:
    https://bibliotekanauki.pl/articles/419925.pdf
    Data publikacji:
    2018
    Wydawca:
    Wydawnictwo Uniwersytetu Ekonomicznego we Wrocławiu
    Tematy:
    branding
    brand
    management of the area of tourist reception
    national tourist organization (NTO)
    Opis:
    With reference to the current situation of national public hospitals, the article presents the possibility to implement the Lean Management concept in hospital management. Numerous common features connecting the management of commercial entities with the management of healthcare institutions are indicated. It has been stated that the management of contemporary organizations, regardless of the type of conducted operations, needs to focus on customer/patient satisfaction, financial liquidity and high quality. The purpose of the article is to assess the possibility to implement the Lean Management concept in hospitals. In particular, an attempt was made on the basis of a pilot survey to assess the introduction of the above concept in two selected hospitals. Critical analysis of the literature on the subject, the analysis of research results of other authors, casual interview, observation of practice as well as a survey based on the prepared questionnaire were used to achieve the purpose.
    Źródło:
    Nauki o Zarządzaniu; 2018, vol. 23 no. 2; 29-40
    2080-6000
    Pojawia się w:
    Nauki o Zarządzaniu
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Value proposition of smartphone destination marketing: The cases of Hong Kong and South Korea
    Autorzy:
    Kim, Hyun Hee
    Sun, Sunny
    Law, Rob
    Powiązania:
    https://bibliotekanauki.pl/articles/2058087.pdf
    Data publikacji:
    2022
    Wydawca:
    Uniwersytet Ekonomiczny w Katowicach
    Tematy:
    smartphones
    smartphone marketing
    National Tourism Organization (NTO)
    value propositions
    perceived value
    Hong Kong
    South Korea
    Opis:
    Aim/purpose - This paper aims at examining the value propositions of tourism marketing for smartphone marketing and the value perceptions of tourists of using smartphone applications by investigating the National Tourism Organization (NTO) of Hong Kong and South Korea, respectively. Design/methodology/approach - Through conducting in-depth and focus group interviews, the present study explored and compared the value proposition of smartphone destination marketing of the NTOs in Hong Kong and South Korea. Findings - Findings of the present study indicate seven value propositions of the NTO, including aesthetic, functional, hedonic, organizational, social, technological, and user experience values. Research implications/limitations - An increasing number of destination marketing organizations have been adopting smartphones to meet the demands of the competitive marketing environment. Hence, tourism organizations must enhance the delivery of quality travel-related information to improve tourists' perceived value. A conceptual framework was proposed based on the findings of the present study, and valuable practical implications were provided. Originality/value/contribution - The originality of the present study lies in the integration of the value proposition concept in the consumption value theory to the mobile context in tourism.
    Źródło:
    Journal of Economics and Management; 2022, 44; 187-209
    1732-1948
    Pojawia się w:
    Journal of Economics and Management
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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