Results 61 to 70 of about 3,730,095 (253)
Global imaging of the Earth's deep interior: seismic constraints on (an)isotropy, density and attenuation [PDF]
, 2013 Seismic tomography is the principal tool to probe the deep interior of the Earth. Models of seismic anisotropy induced by crystal alignment provide insight into the underlying convective motion, and variations of density allow us to discriminate between ...
Karato, S.-I. +7 more
core +1 more source
Emerging experimental and computational methods for studying redox‐regulated structural transitions
FEBS Letters, EarlyView.Redox reactions can reshape proteins and alter how they behave in cells, with important consequences for health and disease. This review explores emerging experimental and computational approaches for discovering these redox‐sensitive protein switches, revealing their structural effects, and predicting their behavior, opening new opportunities to ...
Tasneem Rass +2 more
wiley +1 more source
BACKGROUND: Fractures related to osteoporosis and low bone mineral density lead to substantial morbidity, mortality, and cost to individuals and health systems.
GBD 2021 Low Bone Mineral Density Collaborators
core +1 more source
Revista Colombiana de Obstetricia y Ginecología, 2012 Objetivo: evaluar el efecto de las técnicas de capacitación espermática en la fragmentación del ADN. Materiales y métodos: estudio experimental en el cual se describió el efecto de las técnicas de capacitación espermática swim up y gradientes de densidad
Luisa Calderón-Mendoza +2 more
doaj
Structural and biochemical analysis of a B12 superbinder
FEBS Letters, EarlyView.BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices +3 more
wiley +1 more source
An approach to nonlinear viscoelasticity via metric gradient flows [PDF]
, 2013 We formulate quasistatic nonlinear finite-strain viscoelasticity of rate type as a gradient system. Our focus is on nonlinear dissipation functionals and distances that are related to metrics on weak diffeomorphisms and that ensure time-dependent frame ...
Mielke, A. +4 more
core +1 more source
Mechanism investigation and models evaluation of gas transport in dual-porosity coal seam
Meitan kexue jishuMethane is an unconventional natural gas in coal seams. Coalbed methane (CBM) migration behavior constitutes a core issue in coalbed methane extraction. However, there is no consensus on the gas migration mechanism of dual-porosity coal seams.
Wei LIU +4 more
doaj +1 more source
FEBS Letters, EarlyView.Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav +2 more
wiley +1 more source
Turbulent mixing at a stable density interface : the variation of the buoyancy flux–gradient relation [PDF]
, 2007 Experiments conducted on mixing across a stable density interface in a turbulent Taylor–Couette flow show, for the first time, experimental evidence of an increase in mixing efficiency at large Richardson numbers.
Flor, J. -B. +2 more
core +1 more source
TEM turbulence and transport dependence on and in EAST with
Nuclear FusionEvolution of trapped electron mode (TEM) turbulence was observed in H-mode plasmas in the Experimental Advanced Superconducting Tokamak. Unstable high- $k$ ( $k\rho \gt 0.1$ ) TEM and the suppressed low- $k$ ( $k\rho \lt 0.1$ ) TEM are observed when $R ...
N. Sun +17 more
doaj +1 more source