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Toxicity of selected nitramines
Papírek, Jan ; Fojt, Pavel (referee) ; Bednařík, Karel (advisor)
This Bachelor Thesis is focused on determination of toxicity of selected nitramines and nitrosoamines, which had to be synthesized soon. Out of total 10 prepared N-nitro and N- nitrosocompounds 4 were selected for testing their toxicity in test using Duckweed (Lemna Minor). Factor IC50 was determined for two compounds 3,7-dinitro-1,3,5,7-tetraazabicyclo [3.3.1]- nonane (DPT) and 3,7-dinitroso-1,3,5,7-tetraazabyciclo [3.3.1] nonane (DNPT), unfortunately factor for other compounds failed to determine, because conditions of test validity hadn’t been kept. In the end of the thesis is compared toxicity of N-nitro and N-nitrosocompounds based on results and observations.
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Biotransformation of nitro aromates
Tomeček, Jaromír ; Bednařík, Karel (referee) ; Friedl, Zdeněk (advisor)
Contamination by nitroaromatic compounds, such as explosives, pesticides or other nitroaromatic compounds, is worldwide environmental problem. This text focuses on contamination by compounds from military and ammunition industry, most especially 2,4,6-trinitrotoluene (TNT), 1,3,5-trinitro-1,3,5-triazinane (RDX) and 1,3,5,7-tetranitro-1,3,5,7-tetrazocane (HMX). First goal of this work is to provide the reader with a aerobic biodegradation and transformation processes of nitroaromatic compounds named above. The second goal is to compare the toxicity of initial nitroaromates and their transformation intermediates.
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Chemistry of linear polynitramines
Teplá, Romana ; Bednařík, Karel (referee) ; Friedl, Zdeněk (advisor)
This work is focused on chemistry of linear polynitramines, their physical-chemical and explosive properties with regards to the possibility of their preparation and field of utilization as energetic plasticizers of solid propellants and smokeless powder. The use of linear polynitramines as plasticizers or energetic binders is influenced by melting temperature which increases with the number of C-N(NO2)-C units in molecule of energetic material. Linear polynitramines with lower melting temperature are utilized as plasticizers of solid propellants and smokeless powder additives. Linear polynitramines with longer chain and consequently with higher melting points could be used as binders or energetic components of rocket propellants.
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Toxicity of selected nitramines
Papírek, Jan ; Fojt, Pavel (referee) ; Bednařík, Karel (advisor)
This Bachelor Thesis is focused on determination of toxicity of selected nitramines and nitrosoamines, which had to be synthesized soon. Out of total 10 prepared N-nitro and N- nitrosocompounds 4 were selected for testing their toxicity in test using Duckweed (Lemna Minor). Factor IC50 was determined for two compounds 3,7-dinitro-1,3,5,7-tetraazabicyclo [3.3.1]- nonane (DPT) and 3,7-dinitroso-1,3,5,7-tetraazabyciclo [3.3.1] nonane (DNPT), unfortunately factor for other compounds failed to determine, because conditions of test validity hadn’t been kept. In the end of the thesis is compared toxicity of N-nitro and N-nitrosocompounds based on results and observations.
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Biotransformation of nitro aromates
Tomeček, Jaromír ; Bednařík, Karel (referee) ; Friedl, Zdeněk (advisor)
Contamination by nitroaromatic compounds, such as explosives, pesticides or other nitroaromatic compounds, is worldwide environmental problem. This text focuses on contamination by compounds from military and ammunition industry, most especially 2,4,6-trinitrotoluene (TNT), 1,3,5-trinitro-1,3,5-triazinane (RDX) and 1,3,5,7-tetranitro-1,3,5,7-tetrazocane (HMX). First goal of this work is to provide the reader with a aerobic biodegradation and transformation processes of nitroaromatic compounds named above. The second goal is to compare the toxicity of initial nitroaromates and their transformation intermediates.
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Chemistry of linear polynitramines
Teplá, Romana ; Bednařík, Karel (referee) ; Friedl, Zdeněk (advisor)
This work is focused on chemistry of linear polynitramines, their physical-chemical and explosive properties with regards to the possibility of their preparation and field of utilization as energetic plasticizers of solid propellants and smokeless powder. The use of linear polynitramines as plasticizers or energetic binders is influenced by melting temperature which increases with the number of C-N(NO2)-C units in molecule of energetic material. Linear polynitramines with lower melting temperature are utilized as plasticizers of solid propellants and smokeless powder additives. Linear polynitramines with longer chain and consequently with higher melting points could be used as binders or energetic components of rocket propellants.
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