Abstract: Nano pore Mordenite membranes were prepared on the outer surface of ceramic tubular tubes via hydrothermal synthesis and evaluated for dehydration pervaporation of water unsymmetrical dimethylhydrazine UDMH mixtures. Highly water-selective mordenite membranes were prepared and the optimum reaction condition was found to be 24 h crystallization time and 170 °C crystallization temperatu...

The biodegradation effect and pathway of unsymmetrical dimethylhydrazine (UDMH), which is a major rocket propellant with highly toxic properties, with two strains isolated from the acclimated activated sludge were investigated in solution and in soil. The results demonstrated that Stenotrophomonas sp. M12 (M12) was able to degrade UDMH of 50 mg ̈ L ́1 as the sole carbon source in aqueous mineral ...

Nanopore silicalite type membranes were prepared on the outer surface of a porous-mullite tube by in situ liquid phase hydrothermal synthesis. The hydrothermal crystallization was carried out under an autogenously pressure, at a static condition and temperature of 180 °C with tetrapropylammonium bromide (TPABr) as a template agent. The molar composition of the starting gel of silicalite zeolite...

Owing to their present use as rocket fuels and their pharmacologic activity as central nervous system stimulants, substituted hydrazines and hydrazine derivatives have come into increasing use in recent years. The parent compound hydrazine and the methyl-substituted hydrazines are of potential hazard because of their toxicity, volatility, and explosive nature. Exposure to hydrazine vapor brings...

Many modern launch vehicles use unsymmetrical dimethylhydrazine (UDMH) as liquid fuel in the space program. UDMH is highly toxic and poses a serious threat to the environment and to humans. One of the most effective methods of UDMH neutralization in case of fuel spills is adsorption. This paper is the first to suggest using hydrolysis lignin as rocket fuel adsorbent. The research was based ...

Very few animal studies have used 1,1-dimethyl hydrazine (unsymmetrical dimethyl hydrazine - UDMH) as a carcinogen. This study was designed to investigate the carcinogenicity of UDMH in the gastrointestinal tract in a rat model. We wanted to observe if there were any changes in tissue zinc levels and tissue copper zinc superoxide dismutase (CuZnSOD) enzyme activity during the carcinogenic proce...

1 N-nitrosodimethylamine (NDMA) is an emerging disinfection by-product, and we show 2 that use of chlorine dioxide (ClO2) has the potential to increase NDMA formation in waters 3 containing precursors with hydrazine moieties. NDMA formation was measured after 4 oxidation of 13 amines by monochloramine, ClO2 and pre-treatment with ClO2 followed by 5 post-monochloramination. Daminozide, a plant g...

[methyl-14C]Daminozide (succinic acid 2',2'-dimethylhydrazide; 37 mg/kg), 1,1-[14C]dimethylhydrazine (UDMH; 19 mg/kg), and [14C]dimethylnitrosamine (DMNA; 0.1 mg/kg) were administered by oral gavage to male Sprague-Dawley rats. After 24 hr, the animals were killed and DNA was purified from the livers to constant specific radioactivity. After enzymatic degradation of the DNA to the 3'-deoxynucle...