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RFA One is a small-lift multistage launch vehicle with an on-orbit transfer stage designed to transport small and micro-s atellites of up to 1,300 kg into low-Earth polar and Sun-synchronous orbits. It has been in development by German private company Rocket Factory Augsburg since 2019.
Engine Origin Designer Vehicle Use Propellant Power cycle Specific impulse (s) [a] Thrust (N) [a] Chamber pressure (bar) Mass (kg) Thrust: weight ratio [e] Oxidiser: fuel ratio ...
Rocket Factory Augsburg was founded as a spin-off of OHB SE in 2018 by Jörn Spurmann (CCO of RFA), Stefan Brieschenk (COO of RFA), Hans Steiniger (CEO of MT Aerospace) and Marco Fuchs (CEO of OHB SE). [6] As of 2021, Spurmann, Brieschenk, Steiniger, Fuchs, Stefan Tweraser (CEO of RFA), and Jean-Jacques Dordain made up the board of RFA.
Resonance frequency analysis was first suggested as an alternative method of analyzing peri-implant bone in a scientific paper by Meredith N et al in 1996. [4] As stated in the paper’s abstract, in measuring implant stability and osseointegration, “radiographs are of value, but a standardised technique is necessary to ensure repeatability.” [4] The new technique tested involved ...
IC 50 values are typically expressed as molar concentration. IC 50 is commonly used as a measure of antagonist drug potency in pharmacological research. IC 50 is comparable to other measures of potency, such as EC 50 for excitatory drugs. EC 50 represents the dose or plasma concentration required for obtaining 50% of a maximum effect in vivo. [1]
Since the federal government began calculating the economic impact of the RFA in 1998, the law is estimated to have saved small entities (and the US economy as a whole) more than $200 billion [1] without undermining the broad purposes of the regulations it affects. More than 40 US states, as well as a number of other nations, have adopted ...
Cytidine (symbol C or Cyd) is a nucleoside molecule that is formed when cytosine is attached to a ribose ring (also known as a ribofuranose) via a β-N 1-glycosidic bond. Cytidine is a component of RNA. It is a white water-soluble solid [2] that is only slightly soluble in ethanol. [1]
The development of heated humidified high flow started in 1999 with Vapotherm introducing the concept of high flow use with race horses. [2]High flow was approved by the U.S. Food and Drug Administration in the early 2000s and used as an alternative to positive airway pressure for treatment of apnea of prematurity in neonates. [3]