Results 41 to 50 of about 13,928 (209)

EPR and Fluorescence Spectroscopy in the Photodegradation Study of Arabian and Colombian Crude Oils

International Journal of Photoenergy, Volume 2006, Issue 1, 2006., 2006
EPR and fluorescence spectroscopy were used to evaluate the degradation of crude oils of different origins that were submitted to photochemical weathering under tropical conditions. The EPR spectra obtained showed signals of the paramagnetic species: the vanadyl VO2+ ion and organic free radicals.
Carmen L. B. Guedes, Eduardo Di Mauro, Ariana De Campos, Leandro F. Mazzochin, Gislaine M. Bragagnolo, Fernando A. De Melo, Marilene T. Piccinato   +6 more
wiley   +1 more source

Lupeol as a Potential Inhibitor of NorA Efflux Pumps in Staphylococcus aureus: In Silico and In Vitro Evidence

ChemistryOpen, Volume 14, Issue 11, November 2025.
Antimicrobial resistance remains one of the major challenges to global public health, compromising the effectiveness of treatments and contributing to increased morbidity and mortality associated with bacterial infections. Among the mechanisms involved, efflux pumps—such as NorA, expressed in resistant strains of Staphylococcus aureus—are particularly ...
Nara Juliana Santos Araújo, Camila Aparecida Pereira Silva, Vanessa Lima Bezerra, Cicera Datiane Morais Oliveira‐Tintino, Gabriel Gonçalves de Alencar, Maria do Socorro Costa, Ana Raquel Pereira da Silva, Josefa Sayonara dos Santos, Kamila Correa Camara, Heberty diTarso Fernandes Facundo, Lívia Pereira Ferreira, Henrique Douglas Melo Coutinho, José Maria Barbosa Filho, Carolina Bandeira Domiciano, José Bezerra de Araújo‐Neto, Jacqueline Cosmo Andrade‐Pinheiro.   +15 more
wiley   +1 more source

Nanocomposites de matriz epoxi: caracterización de la interfase por fluorescencia [PDF]

, 2014
La utilización de la espectroscopia de fluorescencia ha demostrado ser una herramienta potente y eficaz para evaluar las propiedades de la interfase en nanocomposites de matriz epoxi. Utilizando nanopartículas de sílice como nanorefuerzo se han preparado
Antonelli, Claire
core   +2 more sources

Mientras más, mejor: Análisis de interacciones proteicas mediante fluorescencia

CIENCIA ergo-sum, 2023
El estudio de las interacciones entre proteínas es de gran relevancia para entender los mecanismos moleculares dentro de las células. En las últimas décadas, se han desarrollado estrategias que permiten el análisis de interacciones proteicas sin alterar la estructura celular e incluso se ha logrado combinar estas técnicas para identificar la ...
Gustavo Jiménez-Mejía, Rubén Montalvo-Méndez, Diana Reséndez-Pérez   +2 more
openaire   +1 more source

Vitamin D deficiency induces erectile dysfunction: Role of superoxide and Slpi

British Journal of Pharmacology, Volume 182, Issue 15, Page 3669-3687, August 2025.
Background and Purpose Epidemiological studies suggest a relationship between vitamin D deficiency and erectile dysfunction (ED). We hypothesized that vitamin D deficiency or vitamin D receptor (VDR) knockout causes ED and analysed the underlying molecular mechanisms.
Miguel A. Olivencia, Belén Climent, Bianca Barreira, Daniel Morales‐Cano, Ana Sánchez, Argentina Fernández, Borja García‐Gómez, Javier Romero‐Otero, Claudia Rodríguez, Laura Moreno, Dolores Prieto, María Jesús Larriba, Angel Cogolludo, Javier Angulo, Francisco Perez‐Vizcaino   +14 more
wiley   +1 more source

MINFLUX nanoscopy: Visualising biological matter at the nanoscale level

Journal of Microscopy, Volume 298, Issue 2, Page 219-231, May 2025.
Abstract Since its introduction in 2017, MINFLUX nanoscopy has shown that it can visualise fluorescent molecules with an exceptional localisation precision of a few nanometres. In this overview, we provide a brief insight into technical implementations, fluorescent marker developments and biological studies that have been conducted in connection with ...
Alexander Carsten, Antonio Virgilio Failla, Martin Aepfelbacher   +2 more
wiley   +1 more source

A 19th Century Stormwrecked Black‐Capped Petrel From Vermont Offers Insight Into Historical Vagrancy Processes

Ecology and Evolution, Volume 15, Issue 2, February 2025.
Small historical museum collections can provide unexpected data points in telling the story of how climate change has impacted species. We report a (re)discovered Black‐capped Petrel (Pterodroma hasitata) from the 19th‐century Middlebury College Vertebrate Natural History collection and confirmed its late 1800s Vermont origin through a combination of ...
Oliver W. Patrick, Max Chalfin‐Jacobs, Arthur Lyu, Jody Smith, Ellery Foutch, Alexis M. Mychajliw   +5 more
wiley   +1 more source

SUPRESIÓN DE FLUORESCENCIA EN ESPECTROSCOPÍA RAMAN DE PIEZAS ARQUEOLÓGICAS MEDIANTE SSRS Y SERDS [PDF]

, 2010
"La necesidad de la caracterización de piezas arqueológicas mediante técnicas no destructivas, que no afecten la estética y sean flexibles, es cada vez más requerida por los arqueólogos.
Analia Sicardi
core  

Mediciones de presión con el método de fluorescencia del rubí

Tecnología en Marcha, 2011
Por sus múltiples ventajas, el uso de rubí en mediciones de presión es un tema de amplio interés en la ciencia e ingeniería actual. El procedimiento se basa en la existencia de una relación proporcional entre las condiciones de presión y temperatura ...
Juan Carlos Fallas-Chinchilla, Dhanesh Chandra, Aaron Covington, Erik Emmons   +3 more
doaj  

YBX1 Promotes Esophageal Squamous Cell Carcinoma Progression via m5C‐Dependent SMOX mRNA Stabilization

Advanced Science, Volume 11, Issue 20, May 28, 2024.
Liu et al. identify that YBX1, an m5C reader protein, is upregulated in ESCC tissues. Further, YBX1 promotes ESCC progression by stabilizing SMOX mRNA and consequently activating the mTOCR1 signaling pathway in an NSUN2‐mediated m5C modification‐dependent manner.
Liwen Liu, Yu Chen, Tao Zhang, Guangying Cui, Weiwei Wang, Guizhen Zhang, Jianhao Li, Yize Zhang, Yun Wang, Yawen Zou, Zhigang Ren, Wenhua Xue, Ranran Sun   +12 more
wiley   +1 more source