Results 71 to 80 of about 629,686 (290)

Mirror Chern Bands and Weyl Nodal Loops in Altermagnets

Physical Review Letters
The electronic spectra of altermagnets are a fertile ground for nontrivial topology due to the unique interplay between time-reversal and crystalline symmetries. This is reflected in the unconventional Zeeman splitting between bands of opposite spins, which emerges in the absence of spin-orbit coupling (SOC) and displays nodes along high-symmetry ...
Daniil S. Antonenko, Rafael M. Fernandes, Jörn W. F. Venderbos   +2 more
openaire   +3 more sources

Completely flat bands and fully localized states on surfaces of anisotropic diamond-lattice models

, 2013
We discuss flat-band surface states on the (111) surface in the tight-binding model with nearest-neighbor hopping on the diamond lattice, in analogy to the flat-band edge states in graphene with a zigzag edge. The bulk band is gapless, and the gap closes
Murakami, Shuichi, Takahashi, Ryuji
core   +1 more source

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

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

A SYMMETRICAL DUAL-BAND TERAHERTZ METAMATERIAL WITH CRUCIFORM AND SQUARE LOOPS [PDF]

Progress In Electromagnetics Research C, 2012
A symmetrical terahertz metamaterial for dual-band operation is designed and fabricated. The proposed metamaterial is composed of periodically arranged cruciform and square metal loops. Due to the symmetrical structure, this metamaterial is insensitive with the polarization of the incident wave.
Biao Li, Lianxing He, Ying-Zeng Yin, Wanyi Guo, Xiao-Wei Sun   +4 more
openaire   +1 more source

Holonomy Transformation in the FRW Metric [PDF]

, 2007
In this work we investigate loop variables in Friedman-Robertson-Walker spacetime. We analyze the parallel transport of vectors and spinors in several paths in this spacetime in order to classify its global properties.
A. M. de M. Carvalho, A.M. de M. Carvalho, A.M. de M. Carvalho, A.M. de M. Carvalho, C.J.C. Burges, C.N. Yang, Claudio Furtado, D. Bini, D. Bini, J. Pachos, J.G. Assis, J.G. Assis, K. Wilson, N.A. Voronov, S. Mandelstam, S. Mandelstam, T. Rothman, V.B. Bezerra   +17 more
core   +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

Clinical Assessment of Functional versus Conventional Band and Loop Space Maintainers - A Qualitative Comparative Study

RGUHS Journal of Dental Sciences
Aim The present study aimed to clinically assess and compare functional band and loop FBampL with conventional band and loop space maintainer CBampL.Methods Thirty children aged 4-8 ...
Nashitha Fathima Shamsuddin, Evette Natasha Dsouza, Reshma Pai K, Lakshmi Pallavi K, Harikrishnan S, Anurag Vinod   +5 more
doaj   +1 more source

Pemakaian Crown Loop dan Band Loop di Rahang Bawah Anak Usia Enam Tahun (Laporan Kasus)

Journal of Dentistry Indonesia, 2015
The function of space maintainer is to preserve arch length following the premature loss of a primary teeth. Early loss of primary tooth may compromise the eruption of succedaneous teeth if there is a reduction in the arch length. The Band and Crown Loop
Rivi Isabela, Hendrarlin Soenawan
doaj   +1 more source

A W-Band On-Wafer Active Load-Pull System Based on Down-Conversion Techniques [PDF]

, 2014
A new W-band active load-pull system is presented. It is the first load-pull system to implement a 94 GHz load by means of an active loop exploiting frequency conversion techniques.
Alexandrova, Maria, Colombo, R., Garelli, Marco, Hansruedi Benedickter, Marti, Diego, Ostinelli, Olivier, Ralf Fluckiger, Rickard Lovblom, Teppati, Valeria, Tirelli, Stefano   +9 more
core   +1 more source