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Mostrando ítems 111-120 de 1279
Influência dos íons K+ e Mg2+ na obtenção de apatitas biomiméticas
(Editora Unesp, 2005-01-01)
O crescimento da hidroxiapatita - HA, tanto no meio biológico quanto em soluções aquosas como a Synthetic Body Fluid - SBF, ocorre em meio contendo, além dos elementos Ca e P, elementos-traços essenciais tais como: Mg2+, ...
Influence of arboreal components on the physical-chemical characteristics of the soil under four silvopastoral systems in northeastern Peru
(ElsevierSuiza, 2021-08-06)
Silvopastoral systems (SPS) are presented as an alternative for the protection and recovery of soils; however, the relationship between the tree component and the physical-chemical characteristics of the soil is unknown. ...
Sensitivity of global soil carbon stocks to combined nutrient enrichment
(Wiley Blackwell Publishing, Inc, 2019-06)
Soil stores approximately twice as much carbon as the atmosphere and fluctuations in the size of the soil carbon pool directly influence climate conditions. We used the Nutrient Network global change experiment to examine ...
The adsorption of CO on potassium doped molybdenum carbide surface: An ab-initio study
(Elsevier Science, 2012-02)
We have studied the effect of K on the adsorption of CO on the β-Mo 2C (0 0 1) surface with a periodic supercell method using Density Functional Theory calculations, with the PBE functional the generalized gradient ...
Flow injection amperometric determination of persulfate in cosmetic products using a Prussian Blue film-modified electrode
(2003-12-01)
A flow-injection system with a glassy carbon disk electrode modified with Prussian Blue film is proposed for the determination of persulfate in commercial samples of hair bleaching boosters by amperometry. The detection ...
Flow injection amperometric determination of persulfate in cosmetic products using a Prussian Blue film-modified electrode
(2003-12-01)
A flow-injection system with a glassy carbon disk electrode modified with Prussian Blue film is proposed for the determination of persulfate in commercial samples of hair bleaching boosters by amperometry. The detection ...
Sugarcane residue incubated in soil at different temperatures and nitrogen fertilization
(2015-01-01)
The sugarcane residue deposited on the soil is an alternative source of nutrients, which can serve as a soil conditioner in soil conservation. The effects of sugarcane harvest systems, especially with the residue incorporated ...
Polarographic determination of copper after enrichment by adsorption of the 2,2' - biquinoline complex on activated carbon
(Marcel Dekker, 1991)
A preconcentration method based on the adsorption on activated carbon of a binary complex of copper(I) with 2,2¡-boquinoline, and subsequent polarographic determination of microamounts of copper has been developed. The ...
Incidencia de condiciones de activación de cascarilla de cacao con h3po4 a 500 ºc sobre las características de carbones activados para la captura de Co2
La captura y almacenamiento de dióxido de carbono (CO2) sobre carbones activados derivados de residuos lignocelulósicos, es una alternativa atractiva para reducir el contenido de este gas de efecto invernadero que contribuye ...