Results 71 to 80 of about 9,741,578 (338)

Ray helicity: a geometric invariant for multi-dimensional resonant wave conversion

, 2003
For a multicomponent wave field propagating into a multidimensional conversion region, the rays are shown to be helical, in general. For a ray-based quantity to have a fundamental physical meaning it must be invariant under two groups of transformations:
Allan N. Kaufman, Eugene R. Tracy, H. Weyl, I. B. Bernstein, J. D. Jackson, P. J. Braam, P. J. Braam, R. G. Littlejohn, R. G. Littlejohn   +8 more
core   +1 more source

In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS

FEBS Letters, EarlyView.
We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka, Yuxi Liu, Stefano Maggi, Debnath Ghosal, Jue Wang, Prashant P. Damke, Stephen D. Carter, Wei Zhao, Sukhithasri Vijayrajratnam, Joseph P. Vogel, Carrie L. Shaffer, Grant J. Jensen   +11 more
wiley   +1 more source

A review on the modeling and simulations of solid-state diffusional phase transformations in metals and alloys

Manufacturing Review, 2018
Solid-state diffusional phase transformations are vital approaches for controlling of the material microstructure and thus tailoring the properties of metals and alloys.
Liu Xueyan, Li Hongwei, Zhan Mei
doaj   +1 more source

The Phase Transformations in Hypoeutectoid Steels Mn-Cr-Ni

Archives of Metallurgy and Materials, 2015
The results of a microstructure and hardness investigations of the hypoeutectoid steels Mn-Cr-Ni, imitating by its chemical composition toughening steels, are presented in the paper.
RoŻniata E., Dziurka R.
doaj   +1 more source

The Maupertuis principle and canonical transformations of the extended phase space

, 2000
We discuss some special classes of canonical transformations of the extended phase space, which relate integrable systems with a common Lagrangian submanifold.
Adler M, Arnold V I, Baker S, Bolsinov A V, Charlier C L, Drach J, Flaschka H, Haine L, Hietarinta J, Jacobi C, Kac M, Kolosoff G, Lagrange J, Lanczos C, Levi-Civita T, Liouville J, Maupertuis P, Moser J, Novikov S P, Ramani A, Rauch-Wojciechowski S, Reed M, Rosquist K, Selivanova E N, Selivanova E N, Sklyanin E K, Sklyanin E K, Sklyanin E K, Tsiganov A V, Tsiganov A V, Tsiganov A V, Tsiganov A V, Tsiganov A V, Tsiganov A V, Tsiganov A V, Tsiganov A V, Tsiganov A V, Vinogradov A M   +37 more
core   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

Cell wall target fragment discovery using a low‐cost, minimal fragment library

FEBS Letters, EarlyView.
LoCoFrag100 is a fragment library made up of 100 different compounds. Similarity between the fragments is minimized and 10 different fragments are mixed into a single cocktail, which is soaked to protein crystals. These crystals are analysed by X‐ray crystallography, revealing the binding modes of the bound fragment ligands.
Kaizhou Yan, Mathew Stanley, Olawale Raimi, Andrew T. Ferenbach, Helge C Dorfmueller, Daan M. F. van Aalten   +5 more
wiley   +1 more source

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source

Local phase space and edge modes for diffeomorphism-invariant theories

, 2017
We discuss an approach to characterizing local degrees of freedom of a subregion in diffeomorphism-invariant theories using the extended phase space of Donnelly and Freidel, [JHEP 2016 (2016) 102].
Speranza, Antony J.
core   +1 more source

Structural biology of ferritin nanocages

FEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source