Results 191 to 200 of about 200,100 (292)

Unraveling the symmetry of Al5C3N

Acta Crystallographica Section B, EarlyView.
From experimental and theoretical techniques employed in this thorough reexamination of the structure of Al5C3N, the crystal structure is better described in centrosymmetric space group P63/mmc (No. 194) rather than in the previously reported noncentrosymmetric space group P63mc (No. 186).High‐temperature ceramic compound Al5C3N belongs to the scarcely
Vitalii Shtender, Chin Shen Ong, Pedro Berastegui, Olivier Donzel-Gargand, Johan Cedervall, Charles Hervoches, Premek Beran, Olle Eriksson, Ulf Jansson   +8 more
wiley   +1 more source

Structural insights into urocanate reductase using room‐temperature X‐ray crystallography

Acta Crystallographica Section D, EarlyView.
The active‐site dynamics of the microbial enzyme urocanate reductase were revealed by room‐temperature X‐ray crystallography.Urocanate reductase (UrdA) is a bacterial enzyme that converts urocanic acid to imidazole propionate. Its catalytic residue Arg411 undergoes a large conformational change in the substrate‐bound versus product‐bound states.
Swati Aggarwal, Nitisha Gurav, Esko Oksanen, Karin Lindkvist-Petersson, Raminta Venskutonytė   +4 more
wiley   +1 more source

Investigating transthyretin variants H88R and I107V in amyloid priming: From destabilization to complete dissociation

The FEBS Journal, EarlyView.
Investigated mutations in transthyretin (TTR) disrupt the F87‐centered hydrophobic core that stabilizes its tetrameric structure. The mild I107V mutation weakens inter‐chain packing, while H88R fully abolishes tetramer formation, yielding a monomeric, aggregation‐prone form. Structural, biophysical, and computational analyses reveal that both mutations
István L. Bódy, Zsolt Fazekas, Nóra Wágner, Anna J. Kiss‐Szemán, Veronika Harmat, Zoltán Pozsonyi, Dóra K. Menyhárd, András Perczel   +7 more
wiley   +1 more source

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

Confirming the impact origin of the São Miguel do Tapuio structure, northeastern Brazil

Meteoritics &Planetary Science, EarlyView.
Abstract The São Miguel do Tapuio structure (SMT) is a remarkable, nearcircular feature of about 21 km diameter, centered at 5°37.6′ S, 41°23.3′ W in Piauí state, northeastern Brazil. The structure is located within the sedimentary strata of the Paleozoic–Mesozoic Parnaíba Basin and predominantly comprises sandstones of the Devonian Pimenteiras and ...
Alvaro Penteado Crósta, Neivaldo Araújo de Castro, Marcos Alberto Rodrigues Vasconcelos, Airton Natanael Coelho Dias, Ludovic Ferrière, Wolf Uwe Reimold, Ana Maria Góes, Jackson Alves Martins, Liliana Sayuri Osako, Raimundo Mariano Gomes Castelo Branco   +9 more
wiley   +1 more source

Spaceborne and spaceborn: Physiological aspects of pregnancy and birth during interplanetary flight

Experimental Physiology, EarlyView.
Abstract Crewed interplanetary return missions that are on the planning horizon will take years, more than enough time for initiation and completion of a pregnancy. Pregnancy is viewed as a sequence of processes – fertilization, blastocyst formation, implantation, gastrulation, placentation, organogenesis, gross morphogenesis, birth and neonatal ...
Arun V. Holden
wiley   +1 more source

New <i>para</i>-hydrogen cold neutron source at the Budapest Research Reactor: Monte Carlo simulations. [PDF]

J Appl Crystallogr
Shapiro D, Konik P, Akhyani M, Ioffe A.
europepmc   +1 more source

Violation of detailed balance in non-equilibrium magnons observed by inelastic neutron scattering. [PDF]

Nat Commun
Hua C, Winn BL, Sarkis C, Sala G, Egami T, Tennant DA.   +5 more
europepmc   +1 more source

Development and dosimetric evaluation of a freely deformable ⁶Li-based neutron shield for boron neutron capture therapy. [PDF]

Med Phys
Hu N, Kakino R, Sasaki A, Nojiri M, Akita K, Yoshikawa S, Kohigashi Y, Yoshino Y, Takeno S, Aihara T, Takata T, Tanaka H, Nihei K, Ono K.   +13 more
europepmc   +1 more source

Direct Growth of Transparent Boron Nitride Neutron Shielding Layer for Space Window. [PDF]

Adv Sci (Weinh)
Kim D, Kim G, Jeong H, Hossain SM, Bhattacharjee S, Kwon MI, Lee Y, Yang C, Ham YS, Kim TS, Moon H, Park I, Lee SC, Kim J, Kim J, Park J.   +15 more
europepmc   +1 more source