Mostrando ítems 1-10 de 629
Seasonal variation of flavonoid content in bee bread: Potential impact on hypopharyngeal gland development in Apis mellifera honey bees
(Journal of Apicultural Research, 2020-03-14) [Artigo]
Bee bread is the main source of proteins necessary for the development of hypopharyngeal glands in nurse bees. However, the seasonal chemical composition and its effects on honey bee physiology are poorly understood. Thus, ...
Tangential-flow ultrafiltration: a versatile methodology for determination of complexation parameters in refractory organic matter from Brazilian water and soil samples
(Analytical and Bioanalytical Chemistry, 2003-04-01) [Artigo]
In this work the copper(II) complexation parameters of aquatic organic matter, aquatic and soil humic substances from Brazilian were determined using a new versatile approach based on a single-stage tangential-flow ...
Alterações na atividade da peroxidase e do conteúdo de carboidratos em mandioca cultivada in vitro sob estresse salino
(Scientia Agricola, 1998-01-01) [Artigo]
A influência de estresse induzido por cloreto de sódio (75 e 150 mM) sobre o conteúdo de carboidratos solúveis e atividade da peroxidase, foi estudada em plântulas de mandioca cultivadas in vitro. Os resultados mostraram ...
Evaluation of pure and Ag-doped TiO2 films in the photocatalytic activity of phenol
(GJSFR-B:Chemistry, 2015) [Artigo]
Pure TiO2 films, modified by the addition of Degussa P25 powder and Ag-doped were synthesized using sol-gel route and immobilized in borosilicate support at different withdrawing rates and dipping time. They were characterized ...
Encapsulation effects on the structure-dynamics on drug carriers revealed by neutron scattering
(Neutron News, 2014) [Artigo]
Renewable nanocomposite layer-by-layer assembled catalytic interfaces for biosensing applications
(Langmuir, 2010) [Artigo]
A novel, easily renewable nanocomposite interface based on layer-by-layer (LbL) assembled cationic/anionic layers of carbon nanotubes customized with biopolymers is reported. A simple approach is proposed to fabricate a ...
Polishing of water treated by a biological process with heterogeneous photocatalysis
(Journal of Applied Sciences, 2010-04-20) [Artigo]
Effluent from a vegetal extraction plant situated in the region of Botucatu, state of São Paulo, Brazil was treated by combining a biological process and heterogeneous photocatalysis. The biologically pretreated effluent ...
FAAS determination of metal nutrients in fish feed after ultrasound extraction
(Food Chemistry, 2009-03-15) [Artigo]
This paper proposes a method to determine calcium, magnesium, manganese and zinc in fish feed samples using ultrasound in the analyte extraction process, and subsequent quantification by flame atomic absorption spectrometry ...
Correlations of zinc and selenium concentrations in seminal plasma and serum with sperm count and morphology in domestic cats
(Reproduction in Domestic Animals, 2012-08-01) [Resumo]
Effect of light intensity on chemical composition and essential oil content in Piper aduncum L. leaves and roots
(Planta Medica, 2012-08-01) [Resumo]