Results 101 to 110 of about 26,846,501 (291)
Vibroacoustics of the piano soundboard : (Non)linearity and modal properties in the low- and mid-frequency ranges [PDF]
, 2013 The piano soundboard transforms the string vibration into sound and therefore, its vibrations are of primary importance for the sound characteristics of the instrument.
RÉBILLAT, Marc +2 more
core +1 more source
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
Estudo de comportamento dinamico de semi-eixo homocinetico com o uso de analise modal [PDF]
, 1994 Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro TecnologicoDevido ao constante avanço tecnológico da indústria automobilística, o desempenho vibratório de componentes veiculares atualmente ocupa destacada posição no aspecto de ...
Kniest, Rodrigo Rihl
core
Computational modal analysis of a composite pelvic bone: convergence and validation studies
, 2019 The purpose of the present study was to describe the structural density and geometry of the bone, as well as its sensitivity to the resolution of finite element discretisation.
Henyš, Petr, Čapek, Lukáš
core +1 more source
Applied Sciences, 2019 Typical factors that cause nonlinear behavior in structures are geometric nonlinearity, force and displacement boundary condition nonlinearities, and material nonlinearity.
Jongsuh Lee
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
FEBS Letters, EarlyView.How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley +1 more source
Theoretical-Experimental Modal Analysis of a Flexible Rotor Based on the Jeffcott Model
IngenieríaContext: Rotating equipment that operates at high speeds or handles significant loads is designed based on the concept of flexible shafts. This is the case with turbines, compressors, and turbopumps, among others.
Javier Ruíz-Rodríguez +2 more
doaj +1 more source
The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation
FEBS Letters, EarlyView.Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge +6 more
wiley +1 more source
Resistance to change and frequency of response-dependent stimuli uncorrelated with reinforcement.
, 2009 Stimuli uncorrelated with reinforcement have been shown to enhance response rates and resistance to disruption; however, the effects of different rates of stimulus presentations have not been assessed.
Shahan, Timothy A. +7 more
core +1 more source