Results 51 to 60 of about 50,594 (263)

Developable Ruled Surfaces with Constant Mean Curvature Along a Curve

open access: yesMathematics
In this work, we study developable ruled surfaces with constant mean curvature along a curve. The mean curvature of developable ruled surfaces generated by indicatrix curves is calculated.
İsmet Gölgeleyen   +2 more
doaj   +1 more source

Totally real surfaces in CP2 with parallel mean curvature vector

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1992
It has been shown that a totally real surface in CP2 with parallel mean curvature vector and constant Gaussian curvature is either flat or totally geodesic.
M. A. Al-Gwaiz, Sharief Deshmukh
doaj   +1 more source

A New Approach to Rotational Weingarten Surfaces

open access: yesMathematics, 2022
Weingarten surfaces are those whose principal curvatures satisfy a functional relation, whose set of solutions is called the curvature diagram or the W-diagram of the surface.
Paula Carretero, Ildefonso Castro
doaj   +1 more source

An unexpected alternative viologen electron mediator site in tungsten‐containing formate dehydrogenase

open access: yesFEBS Letters, EarlyView.
An unexpected alternative interaction site for ethyl viologen was identified in formate dehydrogenase 1 from Methylorubrum extorquens. Combined mutagenesis, kinetic analysis, and docking revealed that aromatic residues near an iron–sulfur cluster enable flavin mononucleotide‐independent electron transfer, offering a framework for engineering improved ...
Eleni G. Poloniataki, Yong Hwan Kim
wiley   +1 more source

Submanifolds of Euclidean space with parallel mean curvature vector

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1991
The object of the paper is to study some compact submanifolds in the Euclidean space Rn whose mean curvature vector is parallel in the normal bundle.
Tahsin Ghazal, Sharief Deshmukh
doaj   +1 more source

Cell geometry and membrane protein crowding constrain Escherichia coli growth rate, overflow metabolism, respiration, and maintenance energy

open access: yesFEBS Letters, EarlyView.
The physical dimensions and shape of bacterial cells define the surface area available to acquire nutrients and the volume available for synthesizing proteins and DNA. Here, we use computational systems biology to decode the importance of cell geometry as a major determinant of prokaryotic phenotype, including growth rate and metabolic efficiency. This
Ross P. Carlson   +6 more
wiley   +1 more source

Submanifolds of constant sectional curvature with parallel or constant mean curvature

open access: yesTohoku Mathematical Journal, 1993
We classify isometric immersions with flat normal bundle between spaces of constant sectional curvature if either the mean curvature is parallel or if the manifolds are complete Euclidean spaces and the mean curvature is of constant length.
Dajczer, Marcos, Tojeiro, Ruy
openaire   +2 more sources

Global pinching theorems of submanifolds in spheres

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2002
Let M be a compact embedded submanifold with parallel mean curvature vector and positive Ricci curvature in the unit sphere S n+p(n≥2 ,p≥1). By using the Sobolev inequalities of P.
Kairen Cai
doaj   +1 more source

Salmonella lipopolysaccharide‐containing supported lipid bilayers as platforms to study bacteriophage interactions

open access: yesFEBS Letters, EarlyView.
We present robust protocols for the preparation of supported lipid bilayers (SLBs) incorporating either Salmonella smooth LPS or outer membrane vesicles (OMVs). We use a combination of quartz crystal microbalance with dissipation (QCM‐D) and fluorescence microscopy to both characterize the SLBs of various compositions and to probe their interactions ...
Hudson P. Pace   +6 more
wiley   +1 more source

Constant mean curvature foliation: singularity structure and curvature estimate [PDF]

open access: yesPacific Journal of Mathematics, 1996
The author studies codimension-one foliations of 3-dimensional Riemannian manifolds with leaves of constant mean curvature that can vary from leaf to leaf. The foliations are allowed to have isolated center singularities, that is, points having deleted neighborhoods which are foliated by compact leaves.
openaire   +2 more sources

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