combining weight,eq,equivalent weight,equivalent- the atomic weight of an element that has the same combining capacity as a given weight of another element; the standard is 8 for oxygen meq,milliequivalent- one-thousandth of an equivalent
Blade modules also house water and oxygen tanks, with loads pumped between blades to maintain center of gravity as crew move between upper (zero g) and lower (gravity) modules during spin. Each Cerberus "head" is assembled on Luna and launched into low lunar orbit via industrial magrail. Th...
A neat thermoset of diglycidyl ether of bisphenol-A (DGEBA) and 4,4'-diaminodiphenylsulfone (44DDS), and three DGEBA-44DDS nanocomposites of 2.5 wt% octamethyl, octaphenyl or glycidyl POSS were exposed to atomic oxygen at the POSS-rich face only at NASA Glenn Research Center. This took ...
Prior to 1961, a unit of atomic weight was based on 1/16th (0.0625) of the weight of an oxygen atom. After this point, the standard was changed to be 1/12th the weight of a carbon-12 atom in its ground state. A carbon-12 atom is assigned 12 atomic mass units. The unit is dime...
However, the large-scale deployment of PEMWE is hindered by the absence of efficient and durable electrocatalysts for the oxygen evolution reaction (OER)3. The commonly used IrO2 does not satisfactorily accelerate this reaction and is unstable in acidic environments4,5,6, whereas rutile-type RuO...
LO2/MMH: liquid oxygen with monomethyl hydrazine, exhaust velocity ≅ 3,630 m/s Solid-Core NTR: solid core nuclear thermal rocket with liquid hydrogen propellant, exhaust velocity ≅ 7,650 m/s (ideally it would have a Ve of 8,090 m/s, but it is reduced to an effective Ve of 7,...
the atomic weight. See also a copy of the periodic table with atomic weights to five significant figures. See also below the list in Name order . List of Elements in Atomic Number Order. At No SymbolName Atomic Wt Notes 1 H Hydrogen 1.00794(7) 1, 2, 3 2 He Helium 4.002602(2) 1,...
2e reveals the close-proximity distributions of the Co and N elements. Figure 2: Compositional characterizations on the Co-NG. (a) XPS survey spectra of the Co-NG, NG and Co-G. (b) Chart showing the percentages of cobalt, nitrogen, oxygen and carbon in the Co-NG measured by XPS and...
Density functional theory study of atomic oxygen, O 2 and O 3 adsorptions on the H-capped (5,0) single-walled carbon nanotube Density functional theory study of atomic oxygen, O2 and O3 adsorptions on the H-capped (5,0) single-walled carbon nanotube - Khorrampour, Esrafili, ... R Kh...
(8.1 wt%) on a graphitic carbon nitride support. For the semi-hydrogenation of acetylene in excess ethylene, the fabricated catalyst shows extraordinary catalytic performance in terms of activity, selectivity and stability—far superior to supported atomic nickel alone in the absence of a ...