Results 81 to 90 of about 4,035,131 (289)
Case Studies in Thermal EngineeringBased on the overall configuration characteristics of the terahertz detection module and the thermal environmental conditions during the detection mission, particularly the thermal control challenges such as multiple heat sources, high heat dissipation ...
Yantang Hua +6 more
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On geometry of orbits of adapted projective frame space
Дифференциальная геометрия многообразий фигур, 2019 The current paper continues consideration of geometry of projective frame orbits started in the author’s article in the previous issue. The n-dimensional projective space with a distinguished point (the center) is considered.
A. Kuleshov
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The earth orbiting space debris
Serbian Astronomical Journal, 2005 The space debris population is similar to the asteroid belt, since it is subject to a process of high-velocity mutual collisions that affects the long-term evolution of its size distribution. Presently, more than 10 000 artificial debris particles with diameters larger than 10 cm (and more than 300 000 with diameters larger than 1 cm) are orbiting the ...
openaire +4 more sources
Structural and biochemical analysis of a B12 superbinder
FEBS Letters, EarlyView.BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices +3 more
wiley +1 more source
Results in EngineeringThis paper presents a systematic thermal design of the terahertz detection module and analyzes the evaporator's operational modes. A comparative thermal analysis was performed across three modes, with the most extreme mode selected for thermal balance ...
Yantang Hua +7 more
doaj +1 more source
FEBS Letters, EarlyView.Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav +2 more
wiley +1 more source
Rendezvous Simulation for On-Orbit Servicing Missions Using Advanced Robotic Technology [PDF]
, 2013 Increasing complexity and costs of satellite missions promote the idea of extending the operational lifetime or improving functionalities/performance of a satellite in orbit instead of simply replacing it by a new one.
Boge, Toralf, Benninghoff, Heike
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Heat management solutions for the space camera: From design to orbital operations
Case Studies in Thermal EngineeringThe camera mounted at the end of the space robot arm provides real-time visual monitoring and positioning functions during space missions. Its thermal design is crucial for ensuring both functionality and performance, particularly in challenging ...
Richa Hu +4 more
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FEBS Letters, EarlyView.How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
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Chiral separation of chloroalkanes with the chromatographic column onboard Martian rovers
FEBS Letters, EarlyView.Computer image of the Rosalind Franklin Rover of ESA's ExoMars mission. ExoMars is scheduled to land on planet Mars in Oxia Planum in 2029. This area represents an interesting spot to look for biosignatures. Investigations of ExoMars include measurement on molecular chirality. We show that chiral chloroalkanes, that have been identified on Mars, can be
Asma Merzougui +4 more
wiley +1 more source