Results 41 to 50 of about 386,126 (244)
Hydrogen diffusion through polymer membranes [PDF]
MATEC Web of Conferences, 2020 This experimental study determines H2 transfer properties of High Density PolyEthylene (HDPE) or epoxy membranes. Two different techniques are compared. The pressure gradient technique is analyzed for permeability or diffusion. Results show that the main
Gay Nicolas +4 more
doaj +1 more source
Diffusion of hydrogen within idealised grains of bcc-Fe: A kinetic Monte Carlo study
, 2012 Structural defects in materials such as vacancies, grain boundaries, and dislocations may trap hydrogen and a local accumulation of hydrogen at these defects can lead to the degradation of the materials properties.
Drautz, Ralf +2 more
core +1 more source
Physical Review B, 1996 We have imaged hydrogen on Si~001! at low coverages in a variable-temperature STM from 300 K up to 700 K. Individual hydrogen atoms were imaged which became mobile at around 570 K. The observed rate of hopping along the dimer rows was consistent with an activation energy of 1.68 6 0.15 eV.
Owen, J +4 more
openaire +2 more sources
Structural insights into an engineered feruloyl esterase with improved MHET degrading properties
FEBS Letters, EarlyView.A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa +5 more
wiley +1 more source
, 2010 The thermodynamic, kinetic and magnetic properties of the hydrogen monomer on doped graphene layers were studied by ab initio simulations. Electron doping was found to heighten the diffusion potential barrier, while hole doping lowers it.
Guo Ren Zhang +7 more
core +1 more source
The static dipole polarizabilities of helium and molecular hydrogen by differential diffusion Monte Carlo [PDF]
, 1993 The differential diffusion Monte Carlo method, involving correlated random walks, is used to calculate the static polarizabilities of molecular hydrogen and helium by application of a finite electrostatic field.
Briels, W.J., Huiszoon, C.
core +3 more sources
FEBS Letters, EarlyView.This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel +13 more
wiley +1 more source
Cailiao gongcheng, 2016 Elastic stiffness distribution of martensite microstructure was analyzed by using Electron Back Scatter Diffraction(EBSD) experiment, based on which the coupled finite element model of stress-hydrogen interaction was established to study the influence of
ZHONG Zhen-qian +2 more
doaj +1 more source
Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment
Molecular Oncology, EarlyView.This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley +1 more source
Investigation of Mechano-Electrochemical Effects on Hydrogen Distribution at Corrosion Defects
HydrogenThis study employed tensile test, hydrogen permeation measurements, and potentiodynamic polarization testing to investigate the mechanical properties, hydrogen diffusion coefficients, and electrochemical behavior of X80 steel. A multifield coupled finite
Zhixiang Dai +8 more
doaj +1 more source