Results 1 to 10 of about 36,482 (162)
EPR and Fluorescence Spectroscopy in the Photodegradation Study of Arabian and Colombian Crude Oils
International Journal of Photoenergy, 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
Carmen L. B. Guedes +6 more
doaj +2 more sources
Seasonal and intracanopy shifts in the fates of absorbed photons in central Amazonian forests: implications for leaf fluorescence and photosynthesis [PDF]
New Phytologist, Volume 248, Issue 1, Page 76-91, October 2025.Summary Recent studies have shown a linear relationship between solar‐induced Chl fluorescence (SIF) and gross primary productivity (GPP) at large scales. However, this relationship diverges at finer leaf scales, particularly in tropical forests with complex canopy structures.
Leonardo G. Ziccardi +10 more
wiley +2 more sources
Lupeol as a Potential Inhibitor of NorA Efflux Pumps in Staphylococcus aureus: In Silico and In Vitro Evidence [PDF]
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 +15 more
wiley +2 more sources
Um Estudo Experimental sobre a Luz Negra com Smartphone [PDF]
Revista Brasileira de Ensino de Física, 2020 Resumo Neste trabalho, apresentamos um estudo sobre a proposta de luz negra, usando a lanterna de um smartphone em conjunto com um filtro azul, e este conjunto emitiria luz ultravioleta, para realizar experimentos de fluorescência.
Diogo Soga +2 more
doaj +1 more source
Vigilância Sanitária em Debate: Sociedade, Ciência & Tecnologia, 2020 Introdução: A qualidade microbiológica da água tratada para hemodiálise está diretamente relacionada à ocorrência de infecções e de reações pirogênicas nos pacientes. Objetivo: Determinar o tempo de incubação mÃnimo e avaliar o desempenho do método microbiológico alternativo para a contagem de bactérias heterotróficas em água de ...
Ellen Gameiro Hilinski +4 more
openaire +2 more sources
Methods in Ecology and Evolution, Volume 14, Issue 12, Page 3055-3067, December 2023., 2023 Abstract The field of ecology has undergone a molecular revolution, with researchers increasingly relying on DNA‐based methods for organism detection. Unfortunately, these techniques often require expensive equipment, dedicated laboratory spaces and specialized training in molecular and computational techniques; limitations that may exclude field ...
Brandon D. Hoenig +6 more
wiley +1 more source
Immunology, Volume 167, Issue 4, Page 622-639, December 2022., 2022 Proposed biophysical model. Abstract Age‐associated changes in T‐cell function play a central role in immunosenescence. The role of aging in the decreased T‐cell repertoire, primarily because of thymic involution, has been extensively studied. However, increasing evidence indicates that aging also modulates the mechanical properties of cells and the ...
Blanca González‐Bermúdez +8 more
wiley +1 more source
A novel fluorescence and DNA combination for versatile, long‐term marking of mosquitoes
Methods in Ecology and Evolution, Volume 12, Issue 6, Page 1008-1016, June 2021., 2021 Abstract Current mark–release–recapture methodologies are limited in their ability to address complex problems in vector biology, such as studying multiple groups overlapping in space and time. Additionally, limited mark retention, reduced post‐marking survival and the large effort in marking, collection and recapture all complicate effective insect ...
Roy Faiman +19 more
wiley +1 more source
Planta Daninha, 2005 O manejo de plantas daninhas na cultura do abacaxi é uma prática indispensável, sendo o controle químico cada vez mais utilizado, uma vez que permite o controle eficiente e não danifica as raízes da cultura.
M.G. Catunda +3 more
doaj +1 more source
Acta Botânica Brasílica, 2010 As matas de galeria são formações florestais que ocupam cerca de 10% da área dos cerrados e representam 1/3 da diversidade de espécies arbóreas ali encontradas. Estudos recentes têm demonstrado a importância dessas florestas em regiões do Brasil central,
Davi Rodrigo Rossatto +3 more
doaj +1 more source