Results 31 to 40 of about 309,134 (277)

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Between noesis and semiosis: Analytic Geometry in textbooks through the lens of Semiotic Representations

Educação Matemática Debate
This paper investigates how analytical geometry is addressed in two collections of textbooks approved by the 2021 National Textbooks and Didatic Materials Program. The research is qualitative in nature and supported by the Teorema System.
Naiara Camargo Gobesso, Rúbia Barcelos Amaral, Beatriz Fernanda Litoldo   +2 more
doaj   +1 more source

Lipschitz geometry of complex surfaces: analytic invariants and equisingularity [PDF]

, 2016
We prove that the outer Lipschitz geometry of a germ $(X,0)$ of a normal complex surface singularity determines a large amount of its analytic structure.
Neumann, Walter D., Pichon, Anne
core  

Continued g-fractions and geometry of bounded analytic maps

, 2013
In this work we study qualitative properties of real analytic bounded maps. The main tool is approximation of real valued functions analytic in rectangular domains of the complex plane by continued g-fractions of Wall.
Tsygvintsev, Alexei
core   +3 more sources

Time after time – circadian clocks through the lens of oscillator theory

FEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo, Carolin Ector, Hanspeter Herzel   +2 more
wiley   +1 more source

Caracterización elemental con elipses tangentes a una recta y un círculo de la envolvente convexa de un cierto par de círculos (Elementary characterization with ellipses tangent to a line and a circle of the convex hull of a certain pair of circles)

Revista Digital Matemática, Educación e Internet
En este trabajo se presenta una caracterización de la envolvente convexa de los círculos (x−1)^2+y^2= 1/4 y (x+ 1)^2+y^2= 1/4 por medio de la unión de las elipses x^2+ 5y^2−4xy= 1/4, x^2+ 5y^2+ 4xy= 1/4 y la familia de las elipses centradas en el ...
Benjamín A. Itzá Ortiz, Erika E. Rodríguez Torres, Margarita Tetlalmatzi Montiel   +2 more
doaj   +1 more source

Um método para condução de inventários florestais sem o uso de equações volumétricas A method for conducting forest inventories without using volumetric equations

Revista Árvore, 2002
Neste trabalho foram conduzidos testes preliminares sobre o uso do método altura relativa, desenvolvido originalmente por Andrade & Leite (1997), para condução de inventário florestal.
Helio Garcia Leite, Valdir Carlos Lima de Andrade   +1 more
doaj   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

A uniform reconstruction formula in integral geometry

, 2011
A general method for analytic inversion in integral geometry is proposed. All classical and some new reconstruction formulas of Radon-John type are obtained by this method.
Gelfand I M, Kunyansky L, Kunyansky L, Minkowski H, Natterer F, Palamodov V, Radon I, Semyanistyi˘ V I, V P Palamodov   +8 more
core   +1 more source

Cell wall target fragment discovery using a low‐cost, minimal fragment library

FEBS Letters, EarlyView.
LoCoFrag100 is a fragment library made up of 100 different compounds. Similarity between the fragments is minimized and 10 different fragments are mixed into a single cocktail, which is soaked to protein crystals. These crystals are analysed by X‐ray crystallography, revealing the binding modes of the bound fragment ligands.
Kaizhou Yan, Mathew Stanley, Olawale Raimi, Andrew T. Ferenbach, Helge C Dorfmueller, Daan M. F. van Aalten   +5 more
wiley   +1 more source