hydrazine


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Related to hydrazine: Methyl hydrazine
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In addition, it provides almost 50% better performance than hydrazine, allowing a spacecraft to travel for a longer period of time even with minimal fuel onboard.
Furthermore, we found that the reaction of pyrimidines 9a and 9b (R = H, R = Me) with hydrazine hydrate gave pyrazoles 10a and 10b whereas the 2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carbaldehyde 9c (R = -CHO) gave pyrazole derivative 10c (Figure 2) [41].
The hydrazine-treated groups were orally administrated with a single dose of hydrazine (150 mg/kg), at which hydrazine could induce an obvious histopathological effect and hepatocellular lipid accumulation [10-14].
For the third reaction, the above process (reaction 1) is also repeated with minor changes; Sb[Cl.sub.3] is used in place of Sb[(C[H.sub.3]COO).sub.3]; KMn[O.sub.4] is used together with hydrazine and N[H.sub.3] in place of NaOH.
The 4-F, 4-C[H.sub.3], 4-OC[H.sub.3], 3-N[O.sub.2] and 4-N[O.sub.2] substituted (E)-1-benzylidene-2-(3-nitrophenyl) hydrazine compounds have shown good activity against Bacillus substilis.
Maintenance determined that hydrazine had not been used and the aircraft was released to maintenance.
The kit does not require harsh reagents such as hydrazine, hence researchers are able to obtain O-glycan samples easily and safely.
Because the new propellant provides improved performance and volumetric efficiency compared to hydrazine, more of it can be stored in propellant tanks of the same volume, resulting in a 50-percent increase in spacecraft maneuvering capability for a given volume.
Therefore we decided to use for the preparation of aza-Phe, aza-Tyr, and aza-Trp precursors another known synthetic pathway, which includes direct A-alkylation of protected hydrazine with appropriate alkyl halides (Scheme 1, right side).
With a colorimetric detector, 40-place sample rack, 10-place reagent tray and quick analysis rates of up to 200 tests per hour, the discrete system makes quick work of many common tests like ammonia, cyanide, nitrate (by enzymatic, hydrazine or vanadium), nitrite, phenol, OP, TKN and total phosphorus.
Currently, Baikonur cosmodrome in Kazakhstan is one of the active spaceports in the world and negative effects of hydrazine derivatives have caused a big issue in the country.
Moreover, TEA reduces the ignition delay of hydrazine with nitrogen tetroxide [9]and ignites with air at temperatures as low as -40[degrees]C 10].
For nickel nanoparticles, chemical synthesis using hydrazine reduction has been a successful synthesis route [17-19].
The ratio of the reactants was 1: 1.5: 0.1 mole for the glucose, phenyl hydrazine and iron (III) chloride.
Ball Aerospace--a Colorado-based company specializing in the development of space technology--joined NASA to run the Green Propellant Infusion Mission (GPIM), a program focused on developing an environmentally safe fuel that could replace the hydrazine currently used in spacecraft.