Results 71 to 80 of about 4,097,489 (343)

Quantum diffusion

, 2011
Quantum diffusion is studied via dissipative Madelung hydrodynamics. Initially the wave packet spreads ballistically, than passes for an instant through normal diffusion and later tends asymptotically to a sub-diffusive law. It is shown that the apparent
Tsekov, Roumen
core   +1 more source

Interlacing Diffusions [PDF]

, 2019
We study in some generality intertwinings between $h$-transforms of Karlin-McGregor semigroups associated with one dimensional diffusion processes and those of their Siegmund duals. We obtain couplings so that the corresponding processes are interlaced and furthermore give formulae in terms of block determinants for the transition densities of these ...
O'Connell, Neil, Assiotis, Theodoros, Warren, Jon   +2 more
openaire   +4 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, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Short communication: Bifidobacterium abundance in the faecal microbiota is strongly associated with milk traits in dairy cattle

Animal
The performance of dairy cows is influenced by the microbial communities hosted within their digestive tract. While the rumen microbiota has long been associated with host phenotypes, the impact of the faecal microbiota remains elusive. In this study, we
L. Brulin, S. Ducrocq, G. Even, M.P. Sanchez, S. Martel, S. Merlin, C. Audebert, P. Croiseau, J. Estellé   +8 more
doaj   +1 more source

A statistical approach to surface renewal: The virtual chamber concept

Agrosystems, Geosciences & Environment, 2021
In the stable conditions prevailing at night, concentrations of emitted gases (e.g., radon [Rn], carbon dioxide [CO2], methane [CH4], ammonia [NH3], and nitrous oxide [N2O]) build up at the surface, with intermittent interruptions due to the passage of ...
Bruce B. Hicks, Nebila Lichiheb, Deb. L. O'Dell, Joel N. Oetting, Neal S. Eash, Mark Heuer, LaToya Myles   +6 more
doaj   +1 more source

Response of a Model of CO Oxidation with CO Desorption and Diffusion to a Periodic External CO Pressure

, 2006
We present a study of the dynamical behavior of a Ziff-Gulari-Barshad model with CO desorption and lateral diffusion. Depending on the values of the desorption and diffusion parameters, the system presents a discontinuous phase transition between low and
Avrami, Avrami, Avrami, Bond, Christmann, E. Machado, Ehsasi, Frank, G.M. Buendía, Hua, Imbhil, Jensen, Johnson, Kolmogorov, Lopez, Machado, Machado, Marro, P.A. Rikvold, Pavlenko, Tomé, Zhdanov, Ziff, Ziff   +23 more
core   +1 more source

Diffuse panbronchiolitis [PDF]

European Respiratory Journal, 2006
Diffuse panbronchiolitis (DPB) is an idiopathic inflammatory disease, well recognised in Japan and principally affecting the respiratory bronchioles, causing a progressive suppurative and severe obstructive respiratory disorder. If left untreated, DPB progresses to bronchiectasis, respiratory failure and death.It was first described in the early 1960s.
V, Poletti, G, Casoni, M, Chilosi, M, Zompatori   +3 more
openaire   +2 more sources

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

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, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Sequence-based genome-wide association study reveals host genomic regions and candidate genes influencing the fecal microbiota of Holstein cows

Journal of Dairy Science
: In recent decades, the digestive tract microbiota of livestock has been extensively studied, revealing associations with host phenotypes, including production- and health-related traits.
L. Brulin, M.-P. Sanchez, Z. Cai, S. Ducrocq, G. Even, S. Martel, S. Merlin, C. Audebert, J. Estellé, G. Sahana, P. Croiseau   +10 more
doaj   +1 more source

An implicit scheme for solving the anisotropic diffusion of heat and cosmic rays in the RAMSES code

, 2015
Astrophysical plasmas are subject to a tight connection between magnetic fields and the diffusion of particles, which leads to an anisotropic transport of energy.
Commerçon, Benoît, Dubois, Yohan
core   +2 more sources