Results 71 to 80 of about 36,928 (235)

Cryo-EM structures of a MexB-MexY chimeric efflux pump reveal that large open clefts are intrinsic to the MexY porter domain. [PDF]

Acta Crystallogr F Struct Biol Commun
In this study, cryo‐EM structures of the chimeric RND transporter MexBYB, composed of MexB and MexY, are presented, revealing distinct symmetric‐like and asymmetric conformations under apo and drug‐supplemented conditions. These structures show that the unusually large open clefts observed in MexBYB, similar to those in MexY, represent a unique ...
Wang J, Tsutsumi K, Hirose M, Nakashima R, Kato T, Nishino K, Nakagawa A, Yamashita E.   +7 more
europepmc   +2 more sources

Discrete SL2 Connections and Self-Adjoint Difference Operators on the Triangulated 2-manifold

, 2013
Discretization Program of the famous Completely Integrable Systems and associated Linear Operators was developed in 1990s. In particular, specific properties of the second order difference operators on the triangulated manifolds and equilateral triangle ...
Grinevich, P. G., Novikov, S. P.
core   +1 more source

Ultralow‐Backscattering Induced Mode Splitting in Chipscale Valley Photonic Topological Cavities

Laser &Photonics Reviews, EarlyView.
The proposed in‐situ metrology based on mode splitting quantifies the ultralow backscattering of topological valley edge states at a single sharp corner, demonstrating near‐lossless topological transport (0.09 dB/corner) on a silicon chip. This work provides insight into the robustness of the photonic valley system and shows the great potential of ...
Kaiji Chen, Wenhao Wang, Yi Ji Tan, Zhonglei Shen, Ridong Jia, Ranjan Singh   +5 more
wiley   +1 more source

Optimum oil palm planting density in West Africa

Oilseeds and fats, crops and lipids, 2018
This article follows on from an earlier one about the same experiment in 2014. A range of various planting distances (from 7.5 to 9.5 metres) between oil palms was tested using an equilateral triangle design.
Bonneau Xavier, Impens Reinout, Buabeng Maxwell   +2 more
doaj   +1 more source

On the Einthoven Triangle: A Critical Analysis of the Single Rotating Dipole Hypothesis

Sensors, 2018
Since its inception, electrocardiography has been based on the simplifying hypothesis that cardinal limb leads form an equilateral triangle of which, at the center/centroid, the electrical equivalent of the cardiac activity rotates during the cardiac ...
Gaetano D. Gargiulo, Paolo Bifulco, Mario Cesarelli, Alistair L. McEwan, Hossein Moeinzadeh, Aiden O’Loughlin, Ibrahim M. Shugman, Jonathan C. Tapson, Aravinda Thiagalingam   +8 more
doaj   +1 more source

Wave Propagation in Periodic Metallic Structures with Equilateral Triangular Holes

Applied Sciences, 2020
This paper studies wave propagation in a periodic parallel-plate waveguide with equilateral triangular holes. A mode-matching method is implemented to analyze the dispersion diagram of the structure possessing glide and mirror symmetries. Both structures
Antonio Alex-Amor, Guido Valerio, Fatemeh Ghasemifard, Francisco Mesa, Pablo Padilla, José M. Fernández-González, Oscar Quevedo-Teruel   +6 more
doaj   +1 more source

Hydration of an apolar solute in a two-dimensional waterlike lattice fluid

, 2005
In a previous work, we investigated a two-dimensional lattice-fluid model, displaying some waterlike thermodynamic anomalies. The model, defined on a triangular lattice, is now extended to aqueous solutions with apolar species. Water molecules are of the
A. Ben-Naim, C. Buzano, C. Tanford, E. De Stefanis, M. Pretti, N. T. Southall   +5 more
core   +1 more source

Reinstatement and generic reassignment of Phyllanthus asteranthos Croizat (Phyllanthaceae) based on living plant observations and specimen analysis

Nordic Journal of Botany, EarlyView.
Phyllanthus asteranthos Croizat has been treated as a synonym of P. pulcher Wall. ex Müll. Arg. (syn. Nymphanthus glaucescens (Miq.) R.W.Bouman) since 1987. Through detailed morphological observations of living plants and critical examinations of type materials and additional specimens, this study revealed that the two taxa are morphologically very ...
Feng Yang, Li‐Ju Jiang, Huan‐Chong Wang   +2 more
wiley   +1 more source

ANATOMICAL STUDY OF SACRAL HIATUS FOR CAUDAL EPIDURAL BLOCK

National Journal of Medical Research, 2012
Introduction: Anatomy of the sacral hiatus is having clinical importance during caudal epidural block. Present study is aimed at determining anatomy of sacrum specially sacral hiatus for caudal epidural block, with the help of morphometric measurements ...
Dhananjay S Patil, Hrishikesh R Jadav, Binodkumar, Mehta C D, Vipul D Patel   +4 more
doaj  

$n^2 + 1$ unit equilateral triangles cannot cover an equilateral triangle of side $> n$ if all triangles have parallel sides

, 2023
Conway and Soifer showed that an equilateral triangle $T$ of side $n + \varepsilon$ with sufficiently small $\varepsilon > 0$ can be covered by $n^2 + 2$ unit equilateral triangles. They conjectured that it is impossible to cover $T$ with $n^2 + 1$ unit equilateral triangles no matter how small $\varepsilon$ is. We show that if we require all sides
Baek, Jineon, Lee, Seewoo
openaire   +2 more sources