Results 71 to 80 of about 538,193 (321)

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

Investigating transport capacity equations in sediment yield modelling for the Cariri semi-arid region of Paraiba-PB/Brazil [PDF]

Proceedings of the International Association of Hydrological Sciences, 2015
In the semi arid Cariri region of the state of Paraiba, Brazil, runoff is of the Hortonian type generated by excess of rainfall over infiltration capacity, and soil erosion is governed by rainfall intensity and sediment size.
E. E. De Figueiredo, C. C. R. A. Souto, Z. C. Vieira   +2 more
doaj   +1 more source

Beam characterization by phase retrieval solving the transport-of-intensity-equation

Optics Express, 2020
A new method for the characterization of coherent laser beams is proposed. It is based on the non-iterative solution of the transport-of-intensity-equation. The phase to recover is decomposed into paraxial properties of laser beams and a set of lateral shifted radial basis functions, which allows for the derivation of a direct solution of the phase by ...
Sebastian Merx, Johannes Stock, Fransiska R. Widiasari, Herbert Gross   +3 more
openaire   +2 more sources

Nonlocal stabilization of nonlinear beams in a self-focusing atomic vapor [PDF]

, 2006
We show that ballistic transport of optically excited atoms in an atomic vapor provides a nonlocal nonlinearity which stabilizes the propagation of vortex beams and higher order modes in the presence of a self-focusing nonlinearity. Numerical experiments
A. G. Litvak, I. A. Kolchugina, M. Saffman, N. N. Akhmediev, S. Skupin, V. A. Mironov, W. Królikowski, Yu. S. Kivshar   +7 more
core   +2 more sources

Valosin‐containing protein counteracts ATP‐driven dissolution of FUS condensates through its ATPase activity in vitro

FEBS Letters, EarlyView.
Biomolecular condensates formed by fused in sarcoma (FUS) are dissolved by high ATP concentrations yet persist in cells. Using a reconstituted system, we demonstrate that valosin‐containing protein (VCP), an AAA+ ATPase, counteracts ATP‐driven dissolution of FUS condensates through its D2 ATPase activity.
Hitomi Kimura, Shin‐ichi Tate, Kyota Yasuda   +2 more
wiley   +1 more source

Quantitative measurements of phase using the transport of intensity equation [PDF]

Journal of Physics: Conference Series, 2008
In this paper we present considerations for experimental recovery of electron phase using the TIE algorithm as applied to TEM images. Realistic simulations have considerably aided interpretation of results. Experimental reconstructions show that low spatial frequency artefacts in the phase reconstruction, resulting from very small variations in the ...
S McVitie, D T Ngo
openaire   +1 more source

Parameter estimation of superdiffusive motion of energetic particles upstream of heliospheric shocks

, 2015
In-situ spacecraft observations recently suggested that the transport of energetic particles accelerated at heliospheric shocks can be anomalous, i.e. the mean square displacement can grow non-linearly in time. In particular, a new analysis technique has
Effenberger, Frederic, Fichtner, Horst, Perri, Silvia, Zimbardo, Gaetano   +3 more
core   +1 more source

Coherent Matter Wave Transport in Speckle Potentials [PDF]

, 2007
This article studies multiple scattering of matter waves by a disordered optical potential in two and in three dimensions. We calculate fundamental transport quantities such as the scattering mean free path $\ell_s$, the Boltzmann transport mean free ...
Akkermans E, Akkermans E, Allen L, Ashcroft N, Bender C M, Berry M V, Born M, C A Müller, C Miniatura, Chandrasekhar S, Clément D, Cohen-Tannoudji C, D Delande, Domb C, Frisch U, Galindo A, Goodman J W, Henkel C, Ishimaru A, John S, Kaiser R, Kopp T, Kopp T, Kramer B, Le Bellac M, Mahan G D, Mandel L, McCrea W H, Minkov G M Germanenko A V Rut O E Sherstobitov A A Zvonkov B N, Mott N F, O Sigwarth, Perrin H, R C Kuhn, Rammer J, Sachdev S, Shapiro B, Sheng P, van Tiggelen B A, Vollhardt D   +38 more
core   +2 more sources

Linking neurogenesis, oligodendrogenesis, and myelination defects to neurodevelopmental disruption in primary mitochondrial disorders

FEBS Letters, EarlyView.
Mitochondrial remodeling shapes neural and glial lineage progression by matching metabolic supply with demand. Elevated OXPHOS supports differentiation and myelin formation, while myelin compaction lowers mitochondrial dependence, revealing mitochondria as key drivers of developmental energy adaptation.
Sahitya Ranjan Biswas, Porter L. Tomsick, Alicia M. Pickrell, Paul D. Morton   +3 more
wiley   +1 more source

Why Do Chromospheric Oscillations in Sunspot Umbrae Appear to Propagate Downward?

The Astrophysical Journal Letters, 2023
Umbral oscillations constitute the most noticeable chromospheric feature of sunspot umbrae—large-amplitude oscillations of intensity (umbral flashes, if very strong) and line-of-sight velocity, with periods of about 3 minutes.
Jongchul Chae, Eun-Kyung Lim, Kyeore Lee, Hannah Kwak, Kyoung-Sun Lee, Juhyung Kang, Soosang Kang   +6 more
doaj   +1 more source