Results 71 to 80 of about 782,019 (297)

Undulatory swimming in shear-thinning fluids: Experiments with C. elegans [PDF]

, 2014
The swimming behaviour of microorganisms can be strongly influenced by the rheology of their fluid environment. In this manuscript, we experimentally investigate the effects of shear-thinning viscosity on the swimming behaviour of an undulatory swimmer ...
Arratia, Paulo E., Gagnon, David A., Keim, Nathan C.   +2 more
core   +3 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

Optimal feeding is optimal swimming for all P\'eclet numbers [PDF]

, 2011
Cells swimming in viscous fluids create flow fields which influence the transport of relevant nutrients, and therefore their feeding rate. We propose a modeling approach to the problem of optimal feeding at zero Reynolds number.
Lauga, Eric, Michelin, Sébastien
core   +3 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

Swimming Speeds of Waving Cylindrical Tails in Viscous Fluids with Resistance

, 2015
Many microorganisms swim in a highly heterogeneous environment with obstacles such as fibers or polymers. To better understand how this environment affects microorganism swimming, we study propulsion of a cylinder or filament in a fluid with a sparse ...
Ho, Nguyenho, Leiderman, Karin, Olson, Sarah D.   +2 more
core   +1 more source

A taste of the deep-sea: The roles of gustatory and tactile searching behaviour in the grenadier fish Coryphaenoides armatus [PDF]

, 2007
The deep-sea grenadier fishes (Coryphaenoides spp.) are among the dominant predators and scavengers in the ocean basins that cover much of Earth's surface. Baited camera experiments were used to study the behaviour of these fishes.
Alan J. Jamieson, Alexander, Atema, Bailey, Collins, David M. Bailey, Douglas, Drazen, Finger, Finger, Fishelson, Fox, Franz-Odendaal, Hans-Joachim Wagner, Harvey, Hjellvik, Imants G. Priede, Jamieson, Jones, Klages, Kotrschal, Kotrschal, Merrett, Murray F. Ross, Pohlmann, Premke, Priede, Reutter, Ruxton, Tripathi, Valentincic, von der Emde, Wagner, Wagner, Wagner, Warrant, Warrant, Webb, Whitear, Widder, Wilson   +40 more
core   +1 more source

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

Swimming of a uniform deformable sphere in a viscous incompressible fluid with inertia

, 2020
The swimming of a deformable uniform sphere is studied in second order perturbation theory in the amplitude of the stroke. The effect of the first order reaction force on the first order center of mass velocity is calculated in linear response theory by ...
Felderhof, B. U., Jones, R. B.
core   +1 more source

Optimal Strouhal number for swimming animals [PDF]

, 2011
To evaluate the swimming performances of aquatic animals, an important dimensionless quantity is the Strouhal number, St = fA/U, with f the tail-beat frequency, A the peak-to-peak tail amplitude, and U the swimming velocity.
Abramowitz, Anderson, Anderson, Archer, Bainbridge, Bainbridge, Barrett, Blake, Blickhan, Borazjani, Brett, Bénard, Candelier, Cheng, Christophe Eloy, D'Août, D'Août, Dewar, Dickson, Doaré, Donley, Dowis, Ellerby, Fish, Fish, Fish, Gillis, Gillis, Gray, Hess, Horner, Huerre, Hunter, Jayne, Jordan, Kayan, Kern, Kojeszewski, Koochesfahani, Lauder, Liao, Lighthill, Lighthill, Long, Long, Long, Lowe, McMillen, Müller, Müller, Müller, Nauen, Parrish, Pier, Rayleigh, Read, Rinaldi, Rohr, Schouveiler, Schultz, Seebacher, Sfakiotakis, Shirgaonkar, Strouhal, Taylor, Triantafyllou, Triantafyllou, Triantafyllou, Tytell, Videler, Videler, Videler, Videler, Wardle, Wassersug, Webb, Webb, Webb, Webb, Webb, Webb, Webb, Webb, Webber, Wu, Wu, Yuen   +86 more
core   +3 more sources

Hyperosmotic stress induces PARP1‐mediated HPF1‐dependent mono(ADP‐ribosyl)ation

FEBS Letters, EarlyView.
Sorbitol‐induced hyperosmotic stress rapidly induces reversible mono(ADP‐ribosyl)ation (MARylation) on PARP1 without the signs of genotoxic signaling. We show that PARP1 autoMARylation is HPF1 dependent and forms hydroxylamine‐resistant O‐glycosidic linkages.
Anna Georgina Kopasz, Mihály Mérey, Rebeka Vásárhelyi, Ramóna Pék, Victor Imburchia, László Henn, Adrián Kószó, Nicholas D. Lakin, Ivan Ahel, Sébastien Huet, Ágnes Czibula, Gyula Timinszky   +11 more
wiley   +1 more source