Fatores abióticos que afetam a distribuição do gênero Astyanax baird & Girard, 1854 em riachos de cabeceiras de Chapada dos Guimarães, bacia do Rio Cuiabá, Mato Grosso

The main factors that influence the species distribution are related mainly with the dispersion capacity, behavior, presence of other species and to the factors physicist-chemistries. Had been evaluated ecological factors that affect the distribution of the genus Astyanax in Chapada dos Guimaraes headstreams, Cuiaba River basin, Mato Grosso, Brazil. Samples in 27 streams had been made in Chapada dos Guimaraes, and the fish had been collected through the method of electric fish, and the ambient data had been analyzed with one technique of called ordinance of Principal Components Analysis (PCA). 250 individuals had been collect, being 95 A. asuncionensis, 62 A. abramis, 36 A. lineatus and 57 individuals had been captured identified like A. scabripinnis (Jenyns, 1842) sensu Eigenmann, 1927. In relation the ambient characteristics, the variables gotten allowed two axes of the PCA, who explain 53,114 % of the variance of the seven variables analyzed. Axle 1, Main Component 1, explained 31,147 % and Axle 2, Main Component 2, explained 21,967 % of the variation of the ambient data. The formation of axle 1 was influenced positively by the depth and negative by the conductivity and pH. The formation of axle 2 was influenced positively by the Turbidity and negative to the Dissolved Oxygen. The ordinance of the species throughout for the axes corroborated for the understanding of the distribution of specimens.

Ultrastructural study of the salivary glands of the sugarcane spittlebug Mahanarva fimbriolata (Stal, 1854) (Euhemiptera : Cercopidae)

Spittlebugs are insects that suck sap from plants and regurgitate saliva containing toxic enzymes into the leaves. As a consequence, the conductive channels are blocked resulting in dry leaves, thus giving a burned aspect to the plantation. This work performed ultrastructural analyses of the salivary glands of the sugarcane spittlebug Mahanarva fimbriolata, since these organs produce the enzymes that are injected into the plants, thus being responsible for the economic losses in the production of sugarcane. Three kinds of secretory cells are found in principal gland, forming the lobules I-IV. The main differences among these cells relate to size, morphology and electron density of the secretory vesicles. The accessory glands contain different secretory vesicles to those in the principal gland. Muscular cells are found around the entire gland. The different secretory vesicles found in both principal and accessory glands indicate that the gland produces different substances or that the secretion in the interior of cells passes through a maturation process. (c) 2005 Elsevier Ltd. All rights reserved.

Respostas morfológicas em Guibourtia hymenifolia (Moric.) J. Leonard (Fabaceae) e Genipa americana L. (Rubiaceae), submetidas ao estresse por deficiência nutricional e alagamento do substrato

Foram estudadas as respostas plásticas em duas espécies nativas. em G. hymenifolia, não foram verificadas modificações morfológicas significativas, exceto quanto ao conteúdo de amido de reserva, que foram menores nos lotes capacidade de campo desnutrido (CCD) e alagamento desnutrido (ALD). em Genipa americana os indivíduos do lote (CCN - capacidade de campo nutrido) exibiram raízes adventícias com aerênquima distinto, mais freqüentes nas plantas do lote controle submetidas ao alagamento (ALN - alagado nutrido). Nessa última espécie, nos lotes ALN, verificou-se o surgimento de aerênquima lisógeno no caule, além da hipertrofia lenticelar. A diversidade de respostas às condições de alagamento, aliada à uma larga ocorrência de populações de Genipa americana em áreas sazonalmente inundadas, como por exemplo no Pantanal de Miranda-MS, sugere um complexo de interações entre caractes adaptativos morfológicos e fisiológicos, sendo o potencial gênico fundamental neste tipo de resposta.

Evaluation of Brazilian woods as an alternative to oak for cachacas aging

Cachaca was aged for 6 months in small casks of oak and eight different Brazilian woods (amarelo, amendoim, balsamo, jatoba, louro, pau d'arco, pau d'oleo, and pereiro) in order to determine total phenols, UV-visible spectra differences, and sensorial acceptance. Also used were 200-l casks of oak and pereiro for aging cachaca for 4 years to characterize sensorial descriptors and acceptance. The results suggest that amendoim and pereiro followed by jatobaa are good candidates to replace oak in the construction of cachaca aging casks. It was also observed that when using oak casks as a standard the major changes in the sensory properties occurred in the first 21 months of aging. The principal components analysis of UV-visible absorption spectra of the same beverage stored in casks made of different woods allowed identification of the wood in which the beverage had been aged.

Population structure of two Astyanax Baird & Girard, 1854 (Teleostei, Characidae) species from upper Paraguaçu river

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Beyond Bretton Woods: what international monetary and financial system for the twenty-first century?

Includes bibliography

Migracion interna en Chile, 1854-1920; caracteristicas de los migrantes

El proyecto de investigacion, base para un estudio a nivel nacional, pretende conocer algunas variables tales como la edad, sexo, profesion, alfabetismo, caracteristicas de la familia, legitimidad y edad de la migracion para varios grupos de migrantes en momentos y lugares diferentes. La principal fuente de informacion son los 7 censos publicados entre 1854 y 1920. Su analisis solo entrega respuestas generales que deben ser completadas con estimaciones de migracion neta calculadas mediante tasas de supervivencia. Utilizando un escaso numero de manuscritos de censos disponibles, se ha podido configurar las caracteristicas basicas del migrante en algunas provincias, pero no su evolucion. Otra fuente de informacion cuantitativa importante son los registros matrimoniales de las parroquias, aunque presentan datos muy parciales. Cada una de las fuentes anteriores entrega informacion sobre distintos grupos de migrantes. Un analisis de sus diferentes resultados para una misma region permitira calificar los meritos de cada una.

Kraft pulp from juvenile and mature woods of corymbia citriodora

Kraft pulp produced from juvenile and mature wood from thirty-two-year-old Corymbia citriodora trees was evaluated. The stem was subdivided into regions of juvenile and mature wood, and then it was transformed into chips. These materials were then cooked in the Laboratory of Pulp and Paper at São Paulo State University (UNESP, Botucatu, SP, Brazil) and the physico-mechanical properties of the pulps were determined. The results showed that: (1) the pulp yields of mature wood were up to 4.4% greater in comparison to the juvenile wood, (2) the juvenile wood pulp required a shorter refining time than mature wood to reach the same Schopper-Riegler degree, (3) the juvenile wood pulp presented lower specific volume, and (4) the mature wood pulp presented greater air resistance, tensile, tear and burst index values, stress-strain factor, and stretch than the juvenile wood pulp.

New gymnospermous woods from the Permian of the Parnaíba Basin, Northeastern Brazil, Part II: Damudoxylon, Kaokoxylon and Taeniopitys

This is the second contribution on the Permian permineralized flora of the Parnaíba Basin, NE Brazil that focuses on the gymnosperm woods from the Motuca Formation. We describe five new species of gymnospermous woods Damudoxylon buritiranaense sp. nov., Damudoxylon humile sp. nov., Damudoxylon roessleri sp. nov., Kaokoxylon punctatum sp. nov. and Taeniopitys tocantinensis sp. nov., and one new form, Taeniopitys sp. 1. The woods vary widely in their anatomy, mainly in their pith features, from simple parenchymatic to solenoid piths with canals and ducts, as well as different cells, such as secretory and sclerenchymatic ones. However, they have one characteristic in common - araucarian pitting in the radial walls of the tracheids. © 2013 Elsevier B.V.

Astyanax baird & girard 1854 (Ostariophysi: Characiformes: Characidae) do sistema do Alto rio Paraná: taxonomia

Pós-graduação em Biologia Animal - IBILCE

Identificação em cana-de-açúcar de genes de resistência a Mahanarva fimbriolata (Stål, 1854) (Hemiptera: Cercopidae)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

A literatura no jornal: José de Alencar e os folhetins de Ao correr da pena (1854-1855)

Pós-graduação em Letras - IBILCE

Danos causados por Mahanarva fimbriolata (STAL, 1854) na qualidade da cana e processo fermentativo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Infestação de Mahanarva fimbriolata (Stal, 1854) e controle químico na qualidade da matéria-prima e classificação do caldo de cana

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Incidência de Diatraea saccharalis Fabr., 1794 (Lepidoptera: Crambidae) e Mahanarva fimbriolata Stal, 1854 (Hemiptera: Cercopidae), produtividade e qualidade tecnológica da cana-de-açúcar em função da irrigação e da fertilização nitrogenada

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)