Results 121 to 130 of about 8,824,973 (236)

A Protocol for Characterizing Comprehensive Two‐Dimensional Liquid Chromatography Systems

open access: yesJournal of Separation Science, Volume 49, Issue 5, May 2026.
ABSTRACT Comprehensive two‐dimensional liquid chromatography (LC × LC) is an effective strategy to increase peak capacity and improve separation performance for complex samples, offering a valuable alternative to conventional one‐dimensional liquid chromatography (1D‐LC).
Megane K. Aebischer   +12 more
wiley   +1 more source

Evaluación de propiedades mecánicas de matrices derivadas a partir de colágeno de escamas de pescado

open access: yesRevista Colombiana de Investigaciones Agroindustriales, 2022
La elaboración de materiales biodegradables surge como alternativa para disminuir la contaminación causada por los desechos plásticos al medio ambiente, con esta premisa, se propuso este estudio comprendido en el desarrollo de biopolímeros plásticos, a ...
Juan Manuel Sánchez-Soto   +3 more
doaj  

A iconografia musical como pauta rítmica de montagem: módulo de ensino, concepção, implementação e teste: conclusão do percurso experimental [PDF]

open access: yes, 2011
Neste artigo apresentamos as conclusões do estudo desenvolvido no âmbito do doutoramento em Design FA-­‐UTL, confrontando estas com os objectivos inicialmente propostos.
Silva, J.M.G.
core  

A Tree‐Based Model for Addressing Sparsity and Taxa Covariance in Microbiome Compositional Count Data

open access: yesStatistics in Medicine, Volume 45, Issue 10-12, May 2026.
ABSTRACT Microbiome compositional data are often high‐dimensional, sparse, and exhibit pervasive cross‐sample heterogeneity. We introduce the “logistic‐tree normal” (LTN) model, a generative model that allows flexible covariance among the microbiome taxa, enables scalable computation, and effectively captures other key characteristics of microbiome ...
Zhuoqun Wang, Jialiang Mao, Li Ma
wiley   +1 more source

Avaliação do módulo de elasticidade de betões de elevado desempenho com cinzas volantes [PDF]

open access: yes, 2001
Os betões de elevado desempenho (BED) geralmente recorrem a materiais e a processos de fabrico de custo mais elevado que o dos betões correntes. Este facto tem condicionado a aplicação destes betões a obras especiais, apesar dos benefícios mecânicos e
Aguiar, J. L. Barroso de   +3 more
core   +1 more source

Non‐Migrating Thermal Tides in the Martian Lower Atmosphere Observed by EMM/EMIRS

open access: yesJournal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract Thermal tides significantly influence Martian atmospheric dynamics and radiative transfer. However, the excitation mechanisms of non‐migrating tides, exhibiting diverse spatial structures, remain poorly understood due to the limited number of observations.
Cong Sun   +13 more
wiley   +1 more source

PROPIEDADES MECANICAS EN FLEXION DE LA MADERA DE Pinus radiata, CRECIENDO EN UN SISTEMA SILVOPASTORAL: I: ELASTICIDAD Y RESISTENCIA BENDING MECHABICAL PROPERTIES OF Pinus radiata WOOD, GROWING IN A SILVOPASTORAL SYSTEM: I: ELASTICITY AND STRENGHT

open access: yesMaderas: Ciencia y Tecnología, 2001
Se evaluaron, los efectos de la frecuencia de fertilización y de dos alturas en el fuste, sobre los parámetros de elasticidad y resistencia en flexión (módulo de elasticidad, esfuerzo en el límite proporcional y módulo de ruptura), de la madera de P ...
Mauricio Ramírez V   +2 more
doaj  

Comportamento de lajes de betão armado reforçadas com laminados de CFRP pré-esforçados [PDF]

open access: yes, 2015
O presente artigo resume o trabalho experimental relativo a ensaios à flexão até à rotura em 12 lajes de betão armado reforçadas com laminados de CFRP pré-esforçados. Foram estudados os seguintes parâmetros: dois sistemas de ancoragem (ancoragem metálica
Correia, Luís Luciano Gouveia   +4 more
core  

Glass bead games: enumeration of possible polytypes based on two stacking vectors and applications to the iron‐ore sinter phases SFCA and SFCA‐I

open access: yesActa Crystallographica Section A, Volume 82, Issue 3, Page 145-162, May 2026.
General formulas are presented that allow for the enumeration of polytypes based on translationally equivalent layers and two equivalent arrangements of adjacent layers involving distinct possible stacking vectors, t1 and t2. The results have been applied to the polytypism among two different polysomes of the family of so‐called silico‐ferrites of ...
Michael Francesco Salzmann   +3 more
wiley   +1 more source

Evaluación del módulo de elasticidad de materiales estéticos para la restauración de lesiones cervicales Assessment of the elasticity module of aesthetic materials for restoration of cervical lesions

open access: yesRevista Cubana de Estomatología, 2012
La pérdida de tejido en la zona cervical ha sido atribuida principalmente a la erosión y abrasión producidas por el cepillo de dientes. El rol de las fuerzas oclusales es un factor muy importante a tener en cuenta en el desarrollo y avance de estas ...
Claudia Estela Bonnin   +1 more
doaj  

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