Results 211 to 220 of about 13,923,765 (402)
Exploring the notion of space coupling propulsion [PDF]
All existing methods of space propulsion are based on expelling a reaction mass (propellant) to induce motion. Alternatively, 'space coupling propulsion' refers to speculations about reacting with space-time itself to generate propulsive forces ...
Millis, Marc G.
core +1 more source
FEBS Open Bio, EarlyView.Sarcosine oxidase from Bacillus sp. (SoxB) recognizes l‐proline (l‐Pro), d‐proline (d‐Pro), and l‐thioproline (l‐Tpr) as minor substrates. In this study, we measured their absorption spectra, determined the crystal structures of their enzyme complexes, and performed site‐directed mutagenesis of key residues.
Yuqi Zhang +5 more
wiley +1 more source
The Way to the Development of the Japan Society for Aeronautical and Space Sciences
, 1974 Tsukumo Uno
openalex +2 more sources
Recommendations are given regarding National Science Foundation (NSF) astronomy programs and the NASA Space Astrophysics program. The role of ground based astronomy is reviewed.
Acton, Loren W. +9 more
core +1 more source
Tryptophan metabolite atlas uncovers organ, age, and sex‐specific variations
FEBS Open Bio, EarlyView.Tryptophan metabolites were analyzed across twelve organs, the central nervous system, and serum in male and female mice at three life stages. We found tissue‐, sex‐, and age‐specific differences, including increased indole‐3‐pyruvate and kynurenine in aging males.
Lizbeth Perez‐Castro +8 more
wiley +1 more source
Microgravity Particle Research on the Space Station [PDF]
Science questions that could be addressed by a Space Station Microgravity Particle Research Facility for studying small suspended particles were discussed. Characteristics of such a facility were determined.
Mckay, Christopher P. +2 more
core +1 more source
Space Development and Space Science Together, an Historic Opportunity [PDF]
, 2016 P. Metzger
semanticscholar +1 more source