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Now showing items 571-580 of 607
Análise foliar de plantas por espectrometria de emissão óptica com plasma induzido por laser (LIBS) e com plasma acoplado indutivamente após ablação com laser (LA-ICP OES)
(Universidade Federal de São Carlos, 2013-09-20)
It has been demonstrated that laser induced breakdown spectrometry (LIBS) can be used as an alternative method for the determination of macro (P, K, Ca, Mg) and micronutrients (B, Fe, Cu, Mn, Zn) in pellets of plant ...
Estudo do processo de liberação lenta de fertilizantes a partir de nanocompósitos de matriz ureia
(Universidade Federal de São Carlos, 2014-04-04)
The efficient use of fertilizers, especially nitrogen ones, is essential and strategic for the obtention of maximum economic crop yields and to minimize the loss of nutrients into the environment. Among the technologies ...
Estudo fitoquímico de Conchocarpus marginatus (Rutaceae), e avaliação do potencial biológico dos compostos isolados
(Universidade Federal de São Carlos, 2013-03-27)
The specie Conchocarpus marginatus is native from Espírito Santo. This plant, that was recently reclassified by PIRANI e KALLUNKI, does not show chemical or biological data in literature yet. In this way, the phytochemical ...
Proposta curricular do estado de Minas Gerais: uma análise pela ótica de professores e alunos do ensino médio
(Universidade Federal de São Carlos, 2013-02-28)
When starting the study of Chemistry Basics, we use the knowledge and knowledge that students already have and they often do not relate to chemistry, and promote thus a connection between scientific knowledge and the ...
Reforma a vapor de acetona sobre catalisadores de Ni e Co/MgAl2O4: efeito das propriedades redox dos reagentes e dos catalisadores nos caminhos de reação
(Universidade Federal de São Carlos, 2014-12-12)
The Steam reforming of Acetone (SRA) reaction was studied on magnesium aluminate (MgAl2O4) supported nickel (Ni) and cobalt (Co) catalysts. The catalysts with 8 wt.% of Ni, Co or Ni-Co were prepared by dry impregnation and ...
Síntese, caracterização e estudo das propriedades eletrônicas de heterocomplexos formados por 4, 4’, 4”, 4’’’, tetrassulfoftalocianina de cobalto (II) e tetrakis(N-metil-4- piridil)porfirina de cobalto (II) e formação de filmes Layer-by- Layer
(Universidade Federal de São Carlos, 2011-02-25)
This work reports the synthesis, characterization and investigation of the electronic properties of heterocomplexes formed by cobalt(II) tetrakis(N-methyl-4- pyridyl)porphyrin (CoTMPyP) and cobalt(II) 4, 4 , 4 , 4 , ...
Efeitos térmicos durante a foto-eletro-oxidação de glicerol catalisada por CdS
(Universidade Federal de São Carlos, 2019-10-25)
Cadmium sulfide (CdS) is one of the most important chalcogenides applied to water splitting, which has a band gap of 2.4 eV that suits very well with the solar spectrum. Moreover, CdS possesses a strong reduction activity ...
Síntese de acil fosfodiésteres por mecanoquímica: uma metodologia de química verde
(Universidade Federal de São Carlos, 2019-08-22)
Green chemistry is very concerned with the sustainability of chemical reactions, where one of the objectives, which in the formulation/remodeling of synthetic routes can replace toxic solvents with solvents of lower toxicity, ...
Preparação de eletrodos com novos materiais à base de carbono para aplicação em eletroanalítica
(Universidade Federal de São Carlos, 2019-06-28)
In this work, electrochemical sensors were developed using two different types of carbon material: carbon black (CB) and reticulated vitreous carbon (3D-RVC) for electrochemical studies and analytical applications. First, ...
Fosfoenolpiruvato carboxiquinase imobilizada: novos modelos de triagem de ligantes
(Universidade Federal de São Carlos, 2019-08-30)
Phosphoenolpyruvate carboxykinase (PEPCK) is a ubiquitous enzyme found in all known groups of organisms, acting in the reversible conversion of oxaloacetate (OAA) to phosphoenolpyruvate (PEP) and CO2, in the presence of ...