Results 51 to 60 of about 686,662 (298)

Intense field stabilization in circular polarization: 3D time-dependent dynamics [PDF]

, 2001
We investigate the stabilization of a hydrogen atom in circularly polarized laser fields. We use a time-dependent, fully three dimensional approach to study the quantum dynamics of the hydrogen atom subject to high intensity, short wavelength laser ...
A. Patel, A. Patel,, B. Piraux, Dae-Il Choi, J. Zakrzewski, K. Burnett, K. C. Kulander, M. P. de Boer, M. P. de Boer, M. Pont, M. Pont, M. Protopapas, M. Protopapas, N. J. van Druten, R. E. Wagner, R. Grobe, R. J. Vos, Will Chism, Will Chism   +18 more
core   +2 more sources

The apo LETM1 F‐EF‐hand adopts a closed conformation that underlies a multi‐modal sensory role in mitochondria

FEBS Letters, EarlyView.
We present the first solution structure of the Ca2+‐depleted LETM1 F‐EF‐hand through a D676A/N678A Ca2+ binding‐deficient mutant, revealing a closed hydrophobic cleft caused by a unique F1‐helix pivot. The apo LETM1 F‐EF‐hand exhibits regiospecific hot and cold unfolding, sensitivity to physiological pH changes and potential for promiscuous heterotypic
Qi‐Tong Lin, Danielle M. Colussi, Peter B. Stathopulos   +2 more
wiley   +1 more source

8-[(1E)-1-(2-Aminophenyliminio)ethyl]-2-oxo-2H-chromen-7-olate

Acta Crystallographica Section E, 2010
The title Schiff base, C17H14N2O3, exists as an NH tautomer with the H atom of the phenol group transferred to the imine N atom. The iminium H atom is involved in a strong intramolecular N+—H...O− hydrogen bond to the phenolate O atom,
E. S. Aazam, A. F. El Husseiny, H. M. Al-Amri, Orhan Büyükgüngör   +3 more
doaj   +1 more source

Hydrogen/nitrogen/oxygen defect complexes in silicon from computational searches

, 2009
Point defect complexes in crystalline silicon composed of hydrogen, nitrogen, and oxygen atoms are studied within density-functional theory (DFT). Ab initio Random Structure Searching (AIRSS) is used to find low-energy defect structures.
Andrew J. Morris, Chris J. Pickard, R. J. Needs, R. Jones   +3 more
core   +1 more source

Structural and mechanistic basis for the regulation of the chloroplast signal recognition particle by (p)ppGpp

FEBS Letters, EarlyView.
LHCPs are transported to the thylakoid membrane via the (cp)SRP pathway. This process involves a transit complex of (cp)SRP43, (cp)SRP54 and LHCP, which interacts with (cp)FtsY and Alb3 at the membrane. GTP hydrolysis by (cp)SRP54 and (cp)FtsY triggers complex dissociation.
Victor Zegarra, Paul Weiland, Pauline Anka Plitzko, Julia Thiery, Laura Czech, Felix Willmund, Patricia Bedrunka, Gert Bange   +7 more
wiley   +1 more source

Atomic swelling upon compression

, 2012
The hydrogen atom under the pressure of a spherical penetrable confinement potential of a decreasing radius $r_{0}$ is explored, as a case study. A novel counter-intuitive effect of atomic swelling rather than shrinking with decreasing $r_{0}$ is ...
Connerade J-P, Connerade J-P, Connerade J-P, Connerade J-P, J L King, Laughlin C, Sabin J R, Sabin J R, Stevanović L, V K Dolmatov, Wallace J   +10 more
core   +1 more source

Making tau amyloid models in vitro: a crucial and underestimated challenge

FEBS Letters, EarlyView.
This review highlights the challenges of producing in vitro amyloid assemblies of the tau protein. We review how accurately the existing protocols mimic tau deposits found in the brain of patients affected with tauopathies. We discuss the important properties that should be considered when forming amyloids and the benchmarks that should be used to ...
Julien Broc, Clara Piersson, Yann Fichou
wiley   +1 more source

(Z)-2-(2-Isopropyl-5-methylphenoxy)-N′-(2-oxoindolin-3-ylidene)acetohydrazide

Acta Crystallographica Section E, 2010
In the title Mannich base, C20H21N3O3, an isatin derivative of thymol, the O—CH2—C(=O)–N(H)—N fragment connecting the aromatic and fused-ring systems is approximately planar, with the N—N single bond in a
Chetan M. Zade, Umesh D. Pete, Amol G. Dikundwar, Ratnamala S. Bendre   +3 more
doaj   +1 more source

Is Schr\"{o}dinger's Conjecture for the Hydrogen Atom Coherent States Attainable

, 1993
We construct the most general SO(4,2) hydrogen atom coherent states which are the counterpart of Schr\"{o}dinger's harmonic oscillator coherent states. We show that these states cannot be localized and cannot follow the classical orbits.
A. O. Barut, B.G. Wybourne, D. Gaeta, Jr., Da Hsuan Feng, E. Schrödinger, Ivaylo Zlatev@f, J. A. Yeazell, J. A. Yeazell, Jr., J. Mostowski, J.C. Gay, L. Moorman, L.S. Brown, M. Nauenberg, R. Gilmore, R. Glauber, R. Shankar, Wei Min Zhang, Wei-Min Zhang@f   +17 more
core   +1 more source

The solution supramolecular structure of α2 → 8 polysialic acid suggests a structural cause for its low immunogenicity

FEBS Letters, EarlyView.
α2 → 8 polysialic acid elicits poor immunogenicity. Small‐angle scattering shows a supramolecular structure with parallel‐chain binding, although in different forms at μm and mm calcium. The major histocompatibility complex requires molecular weights around 2000 Da to produce antibodies, and 2000 Da polysialic oligomers will bind in these structures ...
Kenneth A. Rubinson
wiley   +1 more source