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Mostrando ítems 91-99 de 99
Determinação de Si e Y em amostras agronômicas por espectrometria de emissão óptica com plasma induzido por micro-ondas
(Universidade Federal de São Carlos, 2021-05-20)
Different demands for analytical responses are presented in agricultural research. In this approach, this dissertation, divided into two chapters, seeks to offer analytical alternatives for plant breeding and fish nutrition ...
Propriedades citotóxicas de complexos de Cu(I)-Trifenilfosfina com ligantes aciltioureias ou naftoquinonas
(Universidade Federal de São Carlos, 2021-07-26)
In this work, the synthesis, characterization, and evaluation of the cytotoxic activity of sixteen Cu(I)/Triphenylphosphine complexes containing the acylthiourea or naphthoquinones ligands are presented. The complexes were ...
Avaliação da disponibilidade de fósforo em fertilizantes encapsulados
(Universidade Federal de São Carlos, 2021-11-11)
The concentration of gradient diffusion was used as a passive sampling technique to mimic the physicochemical adsorption of P by plant roots. For this purpose, a binding gel was synthesized from agarose, polyacrylamide, ...
Compreendendo o papel da melamina (C3H6N6) no caminho de degradação de compósitos fertilizantes contendo ureia
(Universidade Federal de São Carlos, 2021-11-23)
This work proposed a study of new fertilizer composites that have melamine in their composition, a molecule of high nitrogen content (66% total mass) but recalcitrant, observing factors that may influence the effective ...
Photoredox-mediated aminoalkylation and carbamoylation of azomethine imines
(Universidade Federal de São Carlos, 2021-08-25)
Over the past decade, the organic synthetic community has witnessed the emergence of a new and complementary approach to the conventional radical chemistry. Photochemistry has proven to be a powerful and more sustainable ...
Síntese da SBA-15 e [Al]-SBA-15 com diferentes ácidos: efeito nas propriedades texturais e estruturais
(Universidade Federal de São Carlos, 2021-09-27)
The development of new heterogeneous catalysts is of fundamental importance to expand their applicability and enable a sustainable future. For this, varying synthesis parameters of those catalysts it is a fundamental study ...
Síntese da SBA-15 funcionalizada com aminossilanos e sua aplicação na condensação aldólica entre o furfural e a acetona
(Universidade Federal de São Carlos, 2021-10-14)
The petroleum is used to manufacture plastics, solvents and, mainly, to produce fuels. However, some factors such as fluctuation in the price of the barrel, its non-renewable origin and the release of greenhouse gases make ...
Transformações alotrópicas de carbono induzidas por irradiação com feixe de elétrons
(Universidade Federal de São Carlos, 2021-08-27)
In the last years, the carbon has attracted scientific and technological interest due to its different allotropic forms, as graphite, graphene, fullerene, and carbon nanotubes, which present unique and promising properties. ...
Avaliação por RMN de alta resolução da presença de cereais não maltados na produção de cervejas
(Universidade Federal de São Carlos, 2020-07-16)
Statistics show that beer is the most widely consumed alcoholic beverage in the world and it is made up of water, barley malt, hops and yeast as main ingredients. The use of non-malted cereals in beer production is common ...