Caracterização das partes não-componentes da carcaça de capivaras no peso de abate comercial, criadas em sistema semi-intensivo.

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Reflexiones sobre comunidades indígenas, patrimonio, identidad y pertenencia cultural: el caso de Chile y Brasil.

El siguiente artículo pretende ver de manera general como se articulan las relaciones de poder en torno al patrimonio cultural y las comunidades indígenas dentro de la actualidad chilena y brasileña. La primera reflexión es sobre la relación del Estado, empresa privada y arqueólogos con las comunidades indígenas y estos mismos actores con el patrimonio material e inmaterial. Somos conscientes que estas reflexiones van a generar mucho más preguntas que respuestas de una situación tan dinámica como compleja.publishedVersio

Carne de capivara produzida em sistema semi-intensivo.

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Caracterização da carcaça e da carne de tachã (Chauna torquata)

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Avaliação de carcaça de machos inteiros e fêmeas de capivara em ponto de abate, criados em sistema semi-intensivo.

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Molecular Aspects of Secretory Granule Exocytosis by Neurons and Endocrine Cells

Neuronal communication and endocrine signaling are fundamental for integrating the function of tissues and cells in the body. Hormones released by endocrine cells are transported to the target cells through the circulation. By contrast, transmitter release from neurons occurs at specialized intercellular junctions, the synapses. Nevertheless, the mechanisms by which signal molecules are synthesized, stored, and eventually secreted by neurons and endocrine cells are very similar. Neurons and endocrine cells have in common two different types of secretory organelles, indicating the presence of two distinct secretory pathways. The synaptic vesicles of neurons contain excitatory or inhibitory neurotransmitters, whereas the secretory granules (also referred to as dense core vesicles, because of their electron dense content) are filled with neuropeptides and amines. In endocrine cells, peptide hormones and amines predominate in secretory granules. The function and content of vesicles, which share antigens with synaptic vesicles, are unknown for most endocrine cells. However, in B cells of the pancreatic islet, these vesicles contain GABA, which may be involved in intrainsular signaling.' Exocytosis of both synaptic vesicles and secretory granules is controlled by cytoplasmic calcium. However, the precise mechanisms of the subsequent steps, such as docking of vesicles and fusion of their membranes with the plasma membrane, are still incompletely understood. This contribution summarizes recent observations that elucidate components in neurons and endocrine cells involved in exocytosis. Emphasis is put on the intracellular aspects of the release of secretory granules that recently have been analyzed in detail

Desempenho e manejo de capivaras em sistema semi-intensivo na Região costeira sul do Rio Grande do Sul.

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Evaluaci\uf3n de Metaphycus sp. (Hymenoptera: Encyrtidae) como agente de control natural de Capulinia sp. cercana a jaboticabae von Ihering (Hemiptera: Eriococcidae)

Geraud-Pouey F, Chirinos DT, Aguirre R, Bravo Y, Quintero JA. 2001. Evaluation of Metaphycus sp. (Hymenoptera: Encyrtidae) as agent of natural control of Capulinia sp. near of jaboticabae von Ihering (Hemiptera: Eriococcidae). Entomotropica 16(3):165-171. In Venezuela, since its appearance in 1993, Capulinia sp. is the most destructive pest on guava ( Psidium guajava L.). By early 1996 parasitism for Metaphycus sp. was detected. To evaluate its effect during March-May 1999 an assay under field conditions was conducted in Mara County, State of Zulia, Venezuela. Utilizing exclusion techniques, the treatments were evaluated: T1, guava branches completely exposed, T2, branches closed into organza cages and T3, branches into organza cages impregnated with insecticide. The populations of Capulinia were counted and the percentage of parasitism was estimated (expressed as parasitized female on female total). On T1, parasitism resulted highest (100%, P<0.05), observing lower population mean (12.70 individual), whereas on T3, Capulinia reached its population maxim levels (200.5 individual) detecting 39.66% of parasitism. Thus, Metaphycus sp. resulted an important regulator factor on Capulinia populations during this period.Geraud-Pouey F, Chirinos DT, Aguirre R, Bravo Y, Quintero JA. 2001. Evaluaci\uf3n de Metaphycus sp. (Hymenoptera: Encyrtidae) como agente de control natural de Capulinia sp. cercana a jaboticabae von Ihering (Hemiptera: Eriococcidae). Entomotropica 16(3):165-171. En Venezuela, desde 1993, Capulinia sp. se ha convertido en la plaga de mayor importancia en el cultivo del guayabo ( Psidium guajava L.). A principios 1996 se detect\uf3 apreciable parasitismo por Metaphycus sp. Para evaluar su efecto, se realiz\uf3 un ensayo de campo durante los meses marzo-mayo 1999, en el municipio Mara, estado Zulia, Venezuela. Mediante la t\ue9cnica de exclusi\uf3n se evaluaron los tratamientos: T1, ramas de guayabo completamente expuestas, T2, ramas encerradas en jaulas de organza y T3, ramas en jaulas de organza impregnadas con insecticida. Se contaron las poblaciones de Capulinia y se estim\uf3 el porcentaje de parasitismo (expresado como hembras parasitadas del total de hembras). En T1, el parasitismo result\uf3 superior (100%, P<0,05), observ\ue1ndose el menor promedio poblacional (12,70 individuos) mientras que en T3, Capulinia alcanz\uf3 sus m\ue1ximos niveles poblacionales (200,5 individuos) detect\ue1ndose 39,66% de parasitismo. As\ued, Metaphycus sp. durante ese per\uedodo de estudio, result\uf3 un importante factor de regulaci\uf3n de las poblaciones de Capulinia sp

Differential expression of synaptophysin and synaptoporin during pre- and postnatal development of the hippocampal network

The closely related synaptic vesicle membrane proteins synaptophysin and synaptoporin are abundant in the hippocampal formation of the adult rat. But the prenatal hippocampal formation contains only synaptophysin, which is first detected at embryonic day 17 (E17) in perikarya and axons of the pyramidal neurons. At E21 synaptophysin immunoreactivity extends into the apical dendrites of these cells and in newly formed terminals contacting these dendrites. The transient presence of synaptophysin in axons and dendrites suggests a functional involvement of synaptophysin in fibre outgrowth of developing pyramidal neurons. Synaptoporin expression parallels the formation of dentate granule cell synaptic contacts with pyramidal neurons: the amount of hippocampal synaptoporin, determined in immunoblots and by synaptoporin immunostaining of developing mossy fibre terminals, increases during the first postnatal week. Moreover, in the adult, synaptoporin is found exclusively in the mossy fibre terminals present in the hilar region of the dentate gyrus and the regio inferior of the cornu ammonis. In contrast, synaptophysin is present in all synaptic fields of the hippocampal formation, including the mossy fibre terminals, where it colocalizes with synaptoporin in the same boutons. Our data indicate that granule neuron terminals differ from all other terminals of the hippocampal formation by the presence of both synaptoporin and synaptophysin. This difference, observed in the earliest synaptic contacts in the postnatal hippocampus and persisting into adult life, suggests distinct functions of synaptoporin in these nerve terminals

Aceptabilidad y preferencia de productos de carpinchos jóvenes y adultos.

Trabalho apresentado em: CONGRESO ARGENTINO DE PRODUCCIÓN ANIMAL, 34.; JOINT MEETING ASAS-AAPA, 1., 2011, Mar del Plata