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Wyświetlanie 1-7 z 7
Tytuł:
Concerning the shock sensitivity of cyclic nitramines incorporated into a polyisobutylene matrix
Autorzy:
Pelikán, W.
Zeman, S.
Yan, Q. L.
Erben, M.
Elbeih, A.
Akštein, Z.
Powiązania:
https://bibliotekanauki.pl/articles/358036.pdf
Data publikacji:
2014
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
BCHMX
β-HMX
RDX
ε-2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane
CL-20
gap test
impact
Opis:
Two types of plastic bonded explosives (PBXs) based on ε-2,4,6,8,10,12hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (ε-HNIW, CL-20), and PBXs based on 1,3,5-trinitro-1,3,5-triazinane (RDX), β-1,3,4,7-tetranitro-1,3,5,7-tetrazocane (β-HMX) and cis-1,3,4,6-tetranitro-octahydroimidazo-[4,5-d]imidazole (bicycloHMX, BCHMX) were prepared using a polyisobutylene binder with dioctylsebacate (DOS) as plasticizer, i.e. a C4 matrix. One version of the ε-HNIW PBX is a product with reduced sensitivity (RS-ε-HNIW). All these PBXs, referenced respectively as RS-ε-HNIW-C4, ε-HNIW-C4, RDX-C4, HMX-C4 and BCHMX-C4, were tested using the Small Scale Gap Test according to STANAG 4488. The results of the gap test on the PBXs with RDX, β-HMX and BCHMX correspond to the impact sensitivities of the original crystalline nitramines. This is not entirely valid for ε-HNIW. In other words, PBXs with RS-ε-HNIW cannot achieve as low a shock sensitivity as would be expected from the differences obtained from the impact sensitivities between RDX, β-HMX and BCHMX, on the one hand, and RS-εHNIW on the other. It is shown that the morphological stability of RS-ε-HNIW in the C4 matrix is insufficient. However, further development and use of RS-ε-HNIW as a filler of PBXs would seem to be both desirable and beneficial. Despite the relatively high impact sensitivity of crystalline BCHMX, the shock sensitivity of its analogous C4 PBX is already good, and comparable with that of RS-ε-HNIW.
Źródło:
Central European Journal of Energetic Materials; 2014, 11, 2; 219-235
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Properties of the Gamma-Cyclodextrin/CL-20 System
Autorzy:
Maksimowski, P.
Rumianowski, T.
Powiązania:
https://bibliotekanauki.pl/articles/358219.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
CL-20/γ-CD complex preparation
properties of CL-20/γ-CD complex
cyclodextrin
2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane
CL-20
Opis:
Cyclodextrin (CD) is a cyclic compound with a spatial structure in the shape of a toroid. It is characterized by specific properties. The outer portion of the structure has hydrophilic properties, while the cavity of the toroid is hydrophobic. This enables cyclodextrin to form inclusion complexes with the enclosure of lipophilic molecules in the interior. This paper presents the results of attempts to form a complex of γ-CD/CL-20. This study determined unambiguously that a γ-CD with CL-20 complex in a mole ratio 1:1 is formed as a result of mixing of solutions of γ-CD and CL-20. This conclusion was corroborated by FTIR, 1H NMR, UV-Vis spectroscopic techniques and by measurement of the density of the complex obtained. The resulting complex of γ-CD/CL-20 is characterized by much lower sensitivity to friction and impact than CL-20 itself.
Źródło:
Central European Journal of Energetic Materials; 2016, 13, 1; 217-229
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Possibilities to monitoring-control of the horse-chestnut leafminer [Cameraria ohridella] with some acetal derivatives of [8E,10Z]-tetradeca-8,10-dienal
Autorzy:
Grodner, J
Jablonski, T.
Kolk, A.
Przybysz, E.
Slusarski, S.
Powiązania:
https://bibliotekanauki.pl/articles/55153.pdf
Data publikacji:
2008
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
Cameraria ohridella
Polska
Mazovia region
attractant
mating disruption
pheromone trapping technique
population control
acetal derivative
horse chestnut leafminer
[8E,10Z]-tetradeca-8,10-dienal
Aesculus hippocastanum
population monitoring
Opis:
This paper shows possibility of utilization ether derivatives of (8E,10Z)-tetradeca-8,10-dienal [2-((7E,9Z)-trideca-7,9-dienyl)-1,3-dioxan (2) and 2-((7E,9Z)-trideca-7,9-dienyl)-4-hydroxy-6-heptyl-5-hexyl-1,3-dioxan (3)] as potential lures for monitoring of horse-chestnut leafminer population. The both propheromones were synthesized at the Institute of Industrial Organic Chemistry (IPO) and then tested in 2006/07 on field trials at several different sites on terrain of Mazovian province. Within the scope of these investigations, acetal 2 was checked at different doses (10, 100, 500 μg) by the pheromone trapping technique, and aldoxane 3 was used both in pheromone trapping (at the dose 50 μg) and mating disruption technique. The good attractiveness properties were obtained for both tested compounds. However, the dose of 2-((7E,9Z)-trideca-7,9-dienyl)-1,3-dioxan had to be a 10 times higher than dose of aldoxane for the same good activity.
Źródło:
Pestycydy; 2008, 3-4; 5-13
0208-8703
Pojawia się w:
Pestycydy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Contribution to the Synthesis of 4,10-Dinitro-2,6,8,12-tetraoxa-4,10-diazatetracyclo[5.5.0.05,903,11]dodecane (TEX)
Autorzy:
Jalový, Z.
Matyáš, R.
Klasovitý, D.
Zeman, S.
Powiązania:
https://bibliotekanauki.pl/articles/358018.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Przemysłu Organicznego
Tematy:
4,10-dinitro-2,6,8,12-tetraoxa-4,10-diazatetracyclo[5.5.0.05,903,11]dodecane
TEX
1,4-diformyl-2,3,5,6-tetrahydroxypiperazine
tertiary amines
insensitive explosives
Opis:
The influence of the reaction conditions on 4,10-dinitro-2,6,8,12-tetraoxa- 4,10-diazatetracyclo[5.5.0.05,903,11]dodecane (TEX) yield was studied. TEX was prepared by the reaction of 1,4-diformyl-2,3,5,6-tetrahydroxypiperazine with glyoxal in nitric acid. The influence of the acidity of reaction mixture and ratios of starting materials on the yield of TEX was examined and synthesis was optimised. The highest yield (37%) was obtained at 1,4-diformyl-2,3,5,6-tetrahydroxypiperazine/nitric acid molar ratio 67 and sulfuric acid/nitric acid molar ratio around 0.15. Starting material 1,4-diformyl-2,3,5,6-tetrahydroxypiperazine was prepared from formamide and glyoxal using triethylamine or other tertiary amines to adjust suitable basicity. The best yield (84%) of 1,4-diformyl-2,3,5,6-tetrahydroxypiperazine was reached at molar ratio triethylamine/formamide equal to 0.1.
Źródło:
Central European Journal of Energetic Materials; 2010, 7, 3; 189-196
1733-7178
Pojawia się w:
Central European Journal of Energetic Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of Strain in Drawing Process and Surface Modification on Resistance to Electrochemical Corrosion of Wires Used in Dentistry
Wpływ odkształcenia w procesie ciągnienia i modyfikacji powierzchni na odporność na korozję elektrochemiczną drutów przeznaczonych dla stomatologii
Autorzy:
Przondziono, J.
Hadasik, E.
Walke, W.
Szala, J.
Powiązania:
https://bibliotekanauki.pl/articles/354545.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
wires made of stainless steel X10CrNi 18-8
electrochemical corrosion in artificial saliva solution
anodic polarisation curves
EIS
SEM
druty ze stali nierdzewnej X10CrNi18-8
korozja elektrochemiczna w roztworze sztucznej śliny
krzywe polaryzacji anodowej
Opis:
The study presents the results of research into the impact of strain in cold drawing and surface modification treatment on corrosion properties of wires made of X10CrNi 18-8 steel used in maxillofacial surgery. Scanning microscopy enabled to make images of the surface of wires after drawing process as well as after surface modification treatment. Resistance to electrochemical corrosion was evaluated on the ground of registered anodic polarisation curves in artificial saliva. In order to evaluate physical and chemical properties of the surface, electrochemical impedance spectroscopy was performed. Test results show deterioration of corrosion properties of wires along with strain taking place in drawing process. It was proved that electrochemical polishing and chemical passivation caused sudden increase of resistance of wires made of stainless steel to pitting corrosion in artificial saliva.
W pracy przedstawiono wyniki badań nad wpływem odkształcenia w procesie ciągnienia na zimno oraz zabiegów modyfikacji powierzchni na właściwości korozyjne drutów wykonanych ze stali X10CrNi 18-8 przeznaczonych do zabiegów chirurgii twarzowo - szczękowej. Przy pomocy mikroskopii skaningowej zobrazowano powierzchnię drutów zarówno po procesie ciągnienia, jak i po zabiegach obróbki powierzchniowej. Odporność na korozję elektrochemiczną oceniano na podstawie rejestracji krzywych polaryzacji anodowej w roztworze sztucznej śliny. W celu oceny właściwości fizykochemicznych powierzchni przeprowadzono elektrochemiczną spektroskopię impedancyjną. Wyniki badań wskazują na pogorszenie właściwości korozyjnych drutów wraz z zachodzącym w procesie ciągnienia umocnieniem odkształceniowym. Stwierdzono, że zabiegi elektrochemicznego polerowania i chemicznej pasywacji spowodowały wzrost odporności drutów wykonanych ze stali nierdzewnej na korozję wżerową w roztworze sztucznej śliny.
Źródło:
Archives of Metallurgy and Materials; 2015, 60, 3A; 1865-1869
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The level of proinflammatory and antiinflammatory cytokines in sperm plasma of fertile and infertile men
Autorzy:
Maksymyuk, H.
Vorobets, Z.
Maksymyuk, V.
Powiązania:
https://bibliotekanauki.pl/articles/2052361.pdf
Data publikacji:
2015
Wydawca:
Akademia Bialska Nauk Stosowanych im. Jana Pawła II w Białej Podlaskiej
Tematy:
sperm
IL-6
IL-8
IL-10
Opis:
The present study was carried out with the aim to evaluate the relation of the content of proinflammatory and antiinflammatory cytokines with the sperm quality indicators. The study involved 45 patients with a pathological spermogram and 15 practically healthy men. A positive correlation (r = 0.45) between the content of IL-6 and the sperm concentration in the ejaculate and a negative correlation (r = -0.42) of this cytokine with the number of live sperm were revealed. The concentration of IL-8 was positively correlated with sperm density (r = 0.52) and it was negatively correlated with the number of live sperm (r = -0.55). A positive correlation between the content of IL-10 and the sperm concentration as well as the number of active forms was observed (r = 0.45 and 0.5, respectively), and a negative correlation (r = -0.7) was observed between the ejaculate volume and the concentration of IL-10. In the obtained ejaculates, a close positive correlation between the content of IL-8 and IL-6 (r = 0.74) and between the concentration of IL-10 and IL-6 (r = 0.72) was observed. Based on the completed study, a conclusion was made that the increased level of IL-6 and IL-8 may result in the reduction of the sperm quality, and, possibly, infertility, and that IL-10 plays an important role in improving sperm parameters.
Źródło:
Health Problems of Civilization; 2015, 09, 4; 21-25
2353-6942
2354-0265
Pojawia się w:
Health Problems of Civilization
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Self-Hardening AlZn10Si8Mg Aluminium Alloy as an Alternative Replacement for AlSi7Mg0.3 Aluminium Alloy
Autorzy:
Vicent, M.
Fabian, P.
Tillova, E.
Powiązania:
https://bibliotekanauki.pl/articles/381802.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
secondary AlSi7Mg0.3 alloy
alloy AlZn10Si8Mg
heat treatment
self-hardening
stop wtórny
stop AlZnSiMg
obróbka cieplna
samoutwardzanie
Opis:
This article deals with the fatigue properties of newly used AlZn10Si8Mg aluminium alloy where the main aim was to determine the fatigue strength and compare it with the fatigue strength of AlSi7Mg0.3 secondary aluminium alloys which is used in the automotive industry for cyclically loaded components. AlZn10Si8Mg aluminium alloy, also called UNIFONT 90, is self-hardening (without heat treatments), which contributes to economic efficiency. This is one of the main reasons why is compared, and may be an alternative replacement for AlSi7Mg0.3 alloy which is heat treated to achieve required mechanical properties. The experiment results show that the fatigue properties of AlZn10Si8Mg alloy are comparable, if not better, than AlSi7Mg0.3 alloy. Fatigue properties of AlZn10Si8Mg alloy are achieved after seven days of natural ageing, immediately after casting and achieving value of fatigue strength is caused by structural components formed during solidification of the melt.
Źródło:
Archives of Foundry Engineering; 2017, 17, 3; 139-142
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-7 z 7

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