Results 121 to 130 of about 31,060 (293)

Caracterização química do óleo essencial de alfazema do Brasil coletada em Paty do Alferes - Rio de Janeiro. [PDF]

open access: yes, 2013
RESUMO: A família Verbenaceae apresenta aproximadamente 100 gêneros que crescem nas regiões tropical e subtropical. Aloysia gratissima (Gillies & Hook) Tronk. é uma espécie que pertence à esta família, sendo popularmente conhecida como Alfazema do Brasil.
CASTANHA, R. F.   +2 more
core  

Vanillin production from lignin depolymerization by acidic deep eutectic solvent and its possible mechanism

open access: yesEnvironmental Progress &Sustainable Energy, EarlyView.
Abstract As one of the most abundant renewable resources and complex aromatic polymers, lignin holds great promise for producing monophenolic compounds. However, its depolymerization into valuable monomers is hindered by intricate side reactions. In this study, alkaline lignin was converted into vanillin using nine choline chloride‐based deep eutectic ...
Xiaoyan Chen, Xiaohui Pan, Dongyang Cui
wiley   +1 more source

Emprego do índice glicêmico e carga glicêmica dos alimentos : uma alternativa nas dietas de pacientes com doenças crônicas ?

open access: yesRasbran, 2014
A prevalência de doenças crônicas tem aumentado em todo o mundo nos últimos anos, e inicia uma série de alterações metabólicas de agravamento da saúde humana.
Viviane Barroso do Nascimento
doaj  

Compuestos orgánicos volátiles: determinación por captación en tubos multilecho y análisis por DT-CG-EM

open access: yes, 2013
Nota tècnica de prevenció.
Gallego Piñol, Eva   +3 more
openaire   +2 more sources

Probabilistic Multi‐Objective Energy Management System Model for an Energy Hub With PtG Technology for Cost Reduction and System Flexibility Improvement

open access: yesEnergy Science &Engineering, EarlyView.
Overview of the under‐study hub energy model showing the energy conversion and distribution among integrated sources and loads. ABSTRACT In this paper, a probabilistic bi‐objective energy management system (EMS) model is proposed for an energy hub (EH) equipped with renewable energy sources such as photovoltaic and wind turbine connected to the main ...
Mohammad Khoshabi   +3 more
wiley   +1 more source

Estudi de microcontaminants orgànics en relació amb un problema de pintura de cotxes [PDF]

open access: yes, 1986
En una fàbrica de cotxes de Barcelona es produeix l'aparició d'un estrany fenomen de formació de porus durant l'operació de pintar les carrosseries dels cotxes.
Borbón i Parera, Jaume   +2 more
core  

Scale‐Invariant Waveguiding in Flatland

open access: yesExploration, EarlyView.
The study introduces scale‐invariant metasurface waveguides with uniform modal field distribution and an effective index independent of the core width. By leveraging spatial symmetry and fine‐tuning mode profiles, the design is validated through near‐field measurements in the C band, offering potential applications in flat optics, sensing, and ...
Zhixia Xu   +5 more
wiley   +1 more source

Adverse outcomes among pregnant women with COVID‐19 according to hospitalization status: A prospective individual participant data meta‐analysis in Europe and North America

open access: yesInternational Journal of Gynecology &Obstetrics, EarlyView.
Abstract Background Understanding the varied impact of COVID‐19 severity on pregnancy outcomes is crucial for informed clinical management and targeted interventions. Objective To evaluate the impact of COVID‐19 on pregnancy outcomes, distinguishing between pregnant women managed in primary care and those requiring hospitalization.
Odette de Bruin   +73 more
wiley   +1 more source

Motion Mitigation Techniques for Abdominal and Cardiac MR Imaging

open access: yesJournal of Magnetic Resonance Imaging, EarlyView.
ABSTRACT MRI of the heart and abdominal organs provides unparalleled soft tissue contrast and quantitative biomarkers, yet remains highly susceptible to physiological motion. Contractions of the myocardium, respiratory excursions, peristalsis, vascular pulsatility, and unpredictable bulk patient movement generate artifacts that impair image quality ...
Eric M. Schrauben   +3 more
wiley   +1 more source

CARACTERIZACIÓN DE EXTRACTIVOS EN ALCOHOL-BENCENO SOLUBLES EN ACETONA DEL BAGAZO DE LA CAÑA DE AZÚCAR MEDIANTE CROMATOGRAFÍA GASEOSA-ESPECTROMETRÍA DE MASAS

open access: yesRevista Centro Azúcar, 2015
Los extractivos separados del bagazo de la caña de azúcar con una mezcla bencenoetanol (1:2) fueron analizados en un GC-17A/MS-QP5050 (Shimadzu). Hernández y  otros (2012) realizaron una determinación cualitativa y cuantitativa de los extractivos,  con ...
Raúl Hernández Sánchez   +3 more
doaj  

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