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Your search keyword '"TRANSITION metal compounds"' showing total 3 results
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3 results on '"TRANSITION metal compounds"'

1. Comparación entre dos cementos selladores con y sin Eugenol sobre la retención de postes de fibra de vidrio cementados con resina Dual Variolink II.

Author

Vera Rolas, Jorge, Dib Kanan, Alejandro, Polanco, Stepháne Henry, Romero, Guillermo Franco, Betancourt Lozano, Elisa, and Rodríguez, Quetzalcóatl Valois

Subjects
*ADHESIVE cements, *ZINC oxide, *GLASS fibers, *ZINC compounds, *TRANSITION metal compounds
Abstract

The present research study compared two endodontic sealer cements, one zinc oxide and eugenol based (Roth 801) and the other one resin based (AH26) on their influence on the retention of glass fiber posts cemented with a dual resin cement (Variolink II). There was a statistically significant difference between the groups. The posts cemented on canals where the resin based sealer was used, needed stronger values of force to be dislodged compared to those where a ZOE based sealer was used. [ABSTRACT FROM AUTHOR]

Published
2004

2. Algunos aspectos acerca de la estructura y propiedades magnéticas de tres complejos dinucleares de Cu(II).

Author

Govea, B. Soto, García, R. Machado, and Hung, M. Casals

Subjects
*COPPER compounds, *COORDINATION compounds, *MAGNETISM, *COUPLING constants, *TRANSITION metal compounds
Abstract

The distortion parameter of three compounds of the type Cu2Cl4N4: di- μ-chloro-bis{chloro[1,2-diphenyl-2-(phenylamino)ethanoximato] copper(II)}(1), di-μ-chloro-bis{chloro[2-(4-methylphenylamino)- 1,2-diphenylethanoximato]copper(II)} (2) and di-μ-chloro-bis{chloro[1,2-diphenyl-2-(4-chlorohenylamino) ethanoximato]copper(II)}(3) is correlated with magnetic data. The coupling constant decreases moderately (from 2,06 to -15,47 cm-1) when the square pyramidal environment changes to trigonal-bipyramidal indicating predominance of the distortion SP → TBP from compound 3 to 1. [ABSTRACT FROM AUTHOR]

Published
2004

3. Efecto de la Concentración de los Micronutrientes en el Crecimiento de Níspero [Manilkara zapota (L.) P. Royen].

Author

Meza, Norkys, Bautista, Dámaso, Pereira, Aracelys, and Pire, Reinaldo

Subjects
*MICRONUTRIENTS, *VEGETATIVE propagation, *PLANT chemical analysis, *CHEMICAL composition of plants, *TRANSITION metal compounds
Abstract

The concentration of four micronutrients in sapodilla plants was determined in order to evaluate its relationship with the vegetative growth. Young plants with three levels of vigor (low, medium and normal) and two ages (1 and 2 years old) were selected. A significant decrease in concentration of Fe, Zn, Mn and Cu was detected in low-vigor plants, regardless of their age. Among these, Mn was the micronutrient mostly involved in the apparent deficiency. [ABSTRACT FROM AUTHOR]

Published
2001

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