Results 71 to 80 of about 441,203 (334)
Advanced Science, EarlyView.Long‐term hippocampal place‐code dynamics are investigated using calcium imaging across weeks of maze navigation. Analyses reveal a novelty‐irrelevant Single‐Field Evolution Rule (SFER), where active fields promote persistence and inactive fields decline.
Cong Chen +10 more
wiley +1 more source
Optical Vortices during a Super-Resolution Process in a Metamaterial
, 2008 We show that a super-resolution process with 100% visibility is characterized by the formation of a point of phase singularity in free space outside the lens in the form of a saddle with topological charge equal to -1.
A. Desyatnikov +14 more
core +1 more source
Eigenvalue Bounds for Saddle-Point Systems with Singular Leading Blocks [PDF]
, 2022 Susanne Bradley, Chen Greif
openalex +1 more source
Advanced Science, EarlyView.The newly designed metallo‐corrole (Mor‐Cor)Ag(III) with a morpholino group exhibited promising therapeutic potential for Alzheimer's disease. It significantly reduces reactive oxygen species (ROS), decreases GFAP expression, increases neurite length, and decreases cell death compared to other similar metallo‐corroles. Abstract Alzheimer's disease (AD)
Arup Tarai +7 more
wiley +1 more source
Twist and Shine: The Impact of Halogen Substitution on Thiele Hydrocarbon's Optical Properties
Angewandte Chemie, EarlyView.Halogenation in Thiele hydrocarbons strongly influences structure and excited‐state dynamics. Depending on substitution, “boat” folded forms show large Stokes shifts and strong solvatochromism, while planar “butterfly” derivatives exhibit near‐unity photoluminescence yields.
Angela Punzi +11 more
wiley +2 more sources
Journal of Physics A: Mathematical and General, 1981 Uses the saddle-point method to study the large-N limit in quantum mechanics. In a model with O(N) symmetry this yields the correct answer for the ground state energy. However, in a (quaternionic) matrix model with Sp(N) symmetry that is not the case.
C Aragao de Carvalho, V A Fateev
openaire +1 more source
Incomplete factorization constraint preconditioners for saddle-point matrices [PDF]
, 2004 We consider the application of the conjugate gradient method to the solution of large symmetric, indefinite linear systems. Special emphasis is put on the use of constraint preconditioners and a new factorization that can reduce the number of flops ...
Dollar, H. Sue, Wathen, A. J.
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Advanced Science, EarlyView.Cerebral ischemia‐reperfusion injury (CIRI) is a key pathological process limiting the efficacy of stroke therapy. This study has developed an innovative, multifunctional, brain‐targeted nanoplatform (RFP) containing MXene nanoenzymes and ferroptosis inhibitors.
Lu Wang +9 more
wiley +1 more source
, 2019 Citation: 'saddle point' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.S05446 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
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Advanced Science, EarlyView.Solution structures of a series of cyclic lipodepsipeptides from Pseudomonas reveal that these specialized metabolites adopt left‐handed alpha helical conformations of only two types, being either ‘stapled’ or ‘catch‐pole’ helix. The particular modular distribution of the biosynthetic gene clusters is found to determine the extent of their conserved ...
Benjámin Kovács +9 more
wiley +1 more source