Estructura administrativa de la Provincia de Bogotá durante el periodo comprendido entre 1832- 1857

El estudio de la estructura administrativa de la provincia de Bogotá en el siglo IX es importante por cuanto se muestra por primera vez cuales fueron los primeros entes administrativos que se crearon durante este periodo, fundamentalmente durante la vigencia de la constitución de 1832. El régimen territorial de las provincias se dividió a su vez en cantones y éstos, en distritos parroquiales.

El color en la obra científica de José Echegaray (1832-1916).

Este artículo pertenece al Monográfico: La Ciencia a las puertas del Tercer Milenio (I)

Soberanía, representación e independencia en Caracas, 1808-1811 (Estudios)

El artículo analiza el impacto que la crisis política de la monarquía española suscitó en Caracas, en donde tuvo lugar un intenso debate. En noviembre de 1808 se intentó erigir una junta, sin éxito. El 19 de abril de 1810 se constituyó la Junta Conservadora de los Derechos del Rey Fernando VII y, finalmente, el 5 de julio de 1811 se declaró la Independencia. El artículo analiza el contenido del debate acerca del ejercicio de la soberanía, así como la manera en que organizaron la representación política quienes tuvieron a su cargo la conducción de este proceso histórico, desde el inicio del movimiento juntista hasta la declaración de la indepedencia.

Galois orders in skew monoid rings

We introduce a new class of noncommutative rings - Galois orders, realized as certain subrings of invariants in skew semigroup rings, and develop their structure theory. The class of Calms orders generalizes classical orders in noncommutative rings and contains many important examples, such as the Generalized Weyl algebras, the universal enveloping algebra of the general linear Lie algebra, associated Yangians and finite W-algebras (C) 2010 Elsevier Inc All rights reserved

Taxonomia e filogenia das serpentes do gênero Typhlops Oppel, 1811 (Squamata: Typhlopidae) ocorrentes na Mata Atlântica brasileira

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior

Efeito da densidade de ninfas de Aphis gossypii Glover, 1877 (Hemiptera, Aphididae) no consumo alimentar e aspectos biológicos de Orius insidiosus (Say, 1832) (Hemiptera, Anthocoridae)

Orius insidiosus (SAY, 1832) is an important predator for biological pest control programs. The objective of this work was to evaluate the functional response, predation capacity and reproductive aspects of O. insidiosus when predating 1, 5, 10, 15, and 20 third/fourth instar nymphs of Aphis gossypii. The tests were conducted under laboratory conditions. Females of the predator were individually maintained in Petri dishes with a cotton leaf at each one of the aphid densities. The average rate of predation was of 0.93 [plus or minus] 0.13, 3.58 [plus or minus] 0.80, 7.31 [plus or minus] 1.45, 7.40 [plus or minus] 1.16, and 10.54 [plus or minus] 1.84 at the densities of 1, 5, 10, 15, and 20 aphids, respectively. The results showed an attack rate of 0.10 h-1 and 1.82 h of manipulation time. The predator spent 3.10 to 4.08 h feeding on leaf cotton glands; this behavior was not directly influenced by the prey density. The proportion of egg laying per female grew up to the density of 10 nymphs whereas the number of eggs per laying increased with the number of available preys.

Efeito de cultivares de algodoeiro sobre a biologia e capacidade predatória de Orius Insidiosus (say, 1832) (hemiptera: anthocoridae) predando Aphis Gossypii Glover, 1877 (Hemiptera: Aphididae)

The objective of this research was to determine the survival, reproduction and predaceous capacity of Orius insidiosus on cotton aphid Aphis gossypii. Cotton plants of Antares, CNPA7H and Acala 90 cultivars (respectively, without tricome, medium tricome density and high tricome density) were individualized and infested with 15 third/fourth instar nymphs of A. gossypii, and then first-instar nymphs of O. insidiosus were released on the plants. The evaluations were made daily, quantifying survival and nymphal development; the number of cotton aphids A. gossypii per day and total; the number of eggs and the population of the predator (number of insects by female); and the conversion efficiency of A. gossypii predaceous. The nymphal development did not differ according to the cotton cultivars. The Antares cultivar favored a higher daily predation rate for the 1st, 2nd and 4th instars and adults of O. insidiosus. The number of eggs and nymphs was smaller when O. insidiosus females were confined on the Acala 90 cultivar. According to the predation rate of O. insidiosus, the efficiency of alimentary conversion was determined for the Antares, CNPA7H and Acala 90 cultivars, being respectively, 4.28, 3.00 and 2.75 cotton aphid predation for each egg of the predator.