Results 111 to 120 of about 184,209 (259)

Role of the methylene amidogen (H2CN) radical in the atmospheres of Titan and Jupiter [PDF]

open access: yes, 1990
The methylene amidogen (H2CN) radical can be shown to be an important intermediate in models for the formation of HCN (via N + CH3) and the recombination of H to H2 (via H + HCN) on Titan as well as in models for the formation of HCN (via NH2 + C2H3) in ...
Marston, G.   +2 more
core   +1 more source

Observation of Two‐Photon Resonant Raman Scattering via the Biexciton Level in Two‐Dimensional Halide Perovskite (C6H5C2H4NH3)2PbI4

open access: yesAdvanced Functional Materials, EarlyView.
Efficient two‐photon resonant Raman scattering (TRRS) is observed in the layered perovskite (PEA)2PbI4, with the biexciton level acting as an intermediate state. TRRS undergoes two‐photon frequency shift upon input frequency tuning, persists up to 90 K, and shows clear threshold behavior and polarization selection rules.
Seung Han Shin   +7 more
wiley   +1 more source

Titan photometric parameters [PDF]

open access: yes
Measurements of the irradiance of Titan from 0.05 to 1.08 micrometer were carried out by 60-inch reflector, spectrometer, and pulse counting electronics. An approximate contour of the geometric albedo assumes methane is the principal absorber. The albedo
Younkin, R. L.
core   +1 more source

A Host‐Guest, Zeolite/Organocation Material With Isotropic Zero Thermal Expansion

open access: yesAdvanced Functional Materials, EarlyView.
The use of selected organic structure directing agents for the hydrothermal synthesis of targeted zeolites exhibiting negative thermal expansion provides a straightforward strategy to obtain a new class of host‐guest, nanostructured, crystalline zero thermal expansion materials made of light and abundant elements.
João Pedro Falk de Campos   +4 more
wiley   +1 more source

Accumulation of endogenous free radicals is required to induce titan-like cell formation in Cryptococcus neoformans

open access: yesmBio
Cryptococcus neoformans is an encapsulated yeast able to cause disease (mainly meningoencephalitis) among immunosuppressed patients, mostly HIV+. This yeast can form the so-called titan cells in vivo, which are cells of an abnormally larger size due to ...
Irene García-Barbazán   +6 more
doaj   +1 more source

Next generation: Unmanned launch vehicles and upper stages: The needs [PDF]

open access: yes
The focus is on common vehicle elements, higher mission success, and lower transportation cost with respect to the common needs of the Department of Defense, NASA, and U.S. Industry.
Gunn, Charles R.
core   +1 more source

Strain Engineering of Magnetoresistance and Magnetic Anisotropy in CrSBr

open access: yesAdvanced Materials, EarlyView.
Biaxial compressive strain significantly enhances magnetoresistance and critical saturation fields in thin flakes of the 2D magnet CrSBr, along all three crystallographic axes. First‐principles calculations link these effects to strain‐induced increases in exchange interactions and magnetic anisotropy.
Eudomar Henríquez‐Guerra   +19 more
wiley   +1 more source

Employing the model of analyze of variance in the study of regional tourism development in the Black Sea countries [PDF]

open access: yes
All efforts to be made as to analyze the tourism activity on the Black Sea countries are justified by the tremendous potential due to the natural and cultural resources that are largely miscellaneous and of high quality.
Stanciulescu, Gabriela, Titan, Emilia
core  

Mixed‐Metal Promotion in a Manganese‐Molybdenum Oxynitride as Catalyst to Integrate C─C and C─N Coupling Reactions for the Direct Synthesis of Acetonitrile from Syngas and Ammonia

open access: yesAdvanced Materials, EarlyView.
Transition metal oxy/carbo‐nitrides show great promise as catalysts for sustainable processes. A Mn‐Mo mixed‐metal oxynitride attains remarkable performance for the direct synthesis of acetonitrile, an important commodity chemical, via sequential C─N and C─C coupling from syngas (C1) and ammonia (N1) feedstocks.
M. Elena Martínez‐Monje   +7 more
wiley   +1 more source

A Titan exploration study: Science, technology and mission planning options, volume 1 [PDF]

open access: yes
Mission concepts and technology advancements that can be used in the exploration of the outer planet satellites were examined. Titan, the seventh satellite of Saturn was selected as the target of interest.
Edsinger, L. E.   +5 more
core   +1 more source

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