Results 21 to 30 of about 17,063 (262)
Fundamental study on optical performance of low-melting-point metal mirrors for space telescopes
Results in Optics, 2023 The installation of telescopes with larger primary mirrors in outer space is required for the study of the early universe. However, the shipping, assembling and maintenance of the primary mirror are technical challenges.
Eisuke Imaizumi +4 more
doaj +1 more source
CONSTRUCTION OF A PARABOLIC SOLAR COLLECTOR AND COMPARATIVE STUDY OF THE PERFORMANCE OF ALUMINUM-COATED PELLICLE FILM AND ALUMINUM FOIL AS REFLECTING SURFACES [PDF]
Journal of Sustainable Energy, 2020 Most of the concentrators used in solar thermal systems are made from mirrors or metals with mirror or other highly reflective surfaces. Because mirror is the best reflecting surface for solar collectors and parabolic mirrors are expensive, people in the
OHAJIANYA, A. C.
doaj
Biaxial Piezoelectric MEMS Mirrors with Low Absorption Coating for 1550 nm Long-Range LIDAR
Micromachines, 2023 This paper presents the fabrication and characterization of a biaxial MEMS (MicroElectroMechanical System) scanner based on PZT (Lead Zirconate Titanate) which incorporates a low-absorption dielectric multilayer coating, i.e., a Bragg reflector.
L. Mollard +10 more
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Поволжская археологияThe article deals with the metal mirrors, found in the Volga Bolgaria and the Bolgar region of the Golden Horde. They are kept in the funds of Tatarstan museums and personal collections. 778 pieces of metal mirrors have been studied.
Rudenko Konstantin A.
doaj +1 more source
Improving of Surface Quality of Metal Reflector Mirrors Machined by Single Point Diamond Turning
Приборы и методы измерений, 2021 Improving the technology of diamond turning of aluminum alloys is of great importance for expanding the application areas of metal-optical products based on aluminum in aerospace technology.
G. A. Gusakov, G. V. Sharonov
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Optical magnetic mirrors without metals
Optica, 2014 The reflection of an optical wave from a metal, arising from strong interactions between the optical electric field and the free carriers of the metal, is accompanied by a phase reversal of the reflected electric field. A far less common route to achieve high reflectivity exploits strong interactions between the material and the optical magnetic field ...
Liu, Sheng +11 more
openaire +3 more sources
Поволжская археология, 2019 Two mirrors which were unearthed in 2016–2017 on the Nur-Tukhum archaeological complex are analyzed in the paper. The first finding is represented by a fragment of a Chinese bronze mirror of the TLV type, originating from the Xiongnu burial, the second ...
Bazarov Bilikto A., Miyagaschev Denis A.
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Reconstructing enzyme evolution by protein engineering
FEBS Letters, EarlyView.Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler +2 more
wiley +1 more source
Поволжская археологияThe article is dedicated to the study of trade relations in the late Volga Bolgaria and the Bolgar region of the Golden Horde in the XII–XIV centuries.
Rudenko Konstantin A. +1 more
doaj +1 more source
Evolutionarily divergent DUF4465 domains have a common vitamin B12‐binding function
FEBS Open Bio, EarlyView.We show that DUF4465 family proteins, widespread across bacteria from gut microbiomes, hydrothermal vents, and soil, share a common vitamin B12‐binding function. These augmented β‐jellyroll proteins bind vitamin B12 via extended loops. Our findings establish sequence‐diverse DUF4465 proteins as a widespread class of B12‐binding proteins, highlighting ...
Charlea Clarke +4 more
wiley +1 more source