Fractionator
Mostrando 1-12 de 13 artigos, teses e dissertações.
-
1. Small-scale environmental enrichment and exercise enhance learning and spatial memory of Carassius auratus, and increase cell proliferation in the telencephalon: an exploratory study
Carassius auratus is a teleost fish that has been largely used in behavioral studies. However, little is known about potential environmental influences on its performance of learning and memory tasks. Here, we investigated this question in C. auratus, and searched for potential correlation between exercise and visuospatial enrichment with the total number of
Braz J Med Biol Res. Publicado em: 25/04/2019
-
2. TUNING OF MODEL PREDICTIVE CONTROL WITH MULTI-OBJECTIVE OPTIMIZATION
Abstract Two multi-objective optimization based tuning methods for model predictive control are proposed. Both methods consider the minimization of the error between the closed-loop response and an output reference trajectory as tuning goals. The first approach is based on the ranking of the outputs according to their importance to the plant operation and it
Braz. J. Chem. Eng.. Publicado em: 2016-06
-
3. Enriched environment contributes to recovery of visual acuity and increases perineuronal nets in monocular-deprived animals
The aim of the present study was to analyze the influence of enriched environment on the distribution of perineuronal nets (PNNs) using a stereogically based unbiased protocol and visual acuity in adult Swiss albino mice that underwent monocular deprivation during the critical period of postnatal development. Eight female Swiss albino mice were monocular dep
Psychology & Neuroscience. Publicado em: 2011-06
-
4. Avaliação morfogenética quantitativa dos plexos submucoso e mioentérico do íleo de eqüinos com aganglionose / Mophogenetic and quantitative assessment of the myenteric and submucosal plexuses of the ileums of horses with ileocolic aganglionosis
A aganglionose intestinal é a ausência congênita e hereditária dos neurônios ganglionares que formam os plexos submucoso e mioentérico, com conseqüente produção de distúrbios peristálticos. Em humanos, esta doença é denominada Doença de Hirschsprung (DH) e nos eqüinos aganglionose íleocólica (AIC). As perdas econômicas na produção eqüina
Publicado em: 2010
-
5. Mecanismos de proliferação neuronal pós-natal no gânglio cervical cranial de preás (Galea spixii spixii) Wagler, 1831. Neurogênese x diferenciação neuronal tardia / Mechanisms of the post-natal neuronal proliferation in the cranial cervical ganglion of preás (Galea spixii spixii) Wagler, 1831. Neurogenesis vs late neuronal differentiation
Neste estudo, foram abordados os aspectos quantitativos do gânglio cervical cranial (GCC) esquerdo de preás (Galea spixii spixii) machos, oriundos do criatório da Universidade Federal Rural do Semi-Árido Nordestino de Mossoró-RN. Os seguintes parâmetros foram estimados: volume do GCC, número total e tamanho dos neurônios (uni e binucleados) durante d
Publicado em: 2009
-
6. Stereological tools in biomedical research
Estudos estereológicos são cada vez mais freqüentes na literatura, particularmente nos campos do desenvolvimento/evolução, patologia e neurociências. O desafio da estereologia é interpretar o arranjo estrutural tridimensional interno com base na análise de cortes da estrutura que mostram apenas uma informação bidimensional. São comentados nesta re
Anais da Academia Brasileira de Ciências. Publicado em: 2003-12
-
7. Identificação de processos dinamicos não lineares : desenvolvimento de software e aplicação a uma coluna fracionadora de eteno
This paper describes the methodology used in the identification and development of petrochemical non-linear dynamic models. In the present study were used techniques of: data handling; process control; optimization and neural networks. A software tool was developed in order to automate of the procedures. On the other hand, the methodology was tested using an
Publicado em: 2003
-
8. Preparation of Cell Walls and Protoplasm of Neisseria with the Ribi Cell Fractionator
The varied pressures required for disruption of Neisseria gonorrhoeae and other species of Neisseria when the Sorvall-Ribi refrigerated cell fractionator is used in the preparation of cell walls and cellular protoplasm are reported. Optimal disruption pressure for the gonococcus was considerably less than that required for other members of the genus Neisseri
-
9. Enzymes Released from Escherichia coli With the Aid of a Servall Cell Fractionator
The release and stability of the enzymes S-adenosylhomocysteine nucleosidase, lysine decarboxylase, arginine decarboxylase, glutamic decarboxylase, formic hydrogenlyase, formic oxidase, and glucose oxidase from Escherichia coli during disruption of the organisms in a Servall-Ribi refrigerated cell fractionator were examined. With the possible exception of ar
-
10. Preparation and chemical composition of the cell walls of Streptococcus mutans.
Purified cell walls from Streptococcus mutans strain BHT were prepared without the use of proteolytic enzymes in order to retain all cell wall constituents for chemical analysis. Of four methods employed, the Ribi cell fractionator produced disrupted cell suspensions which could be most thoroughly purified on sucrose gradients. Results of chemical analyses o
-
11. Particulate Fractions of Neisseria gonorrhoeae
Passage of gonococcal cells through a Ribi cell fractionator produced a mixture of protoplasm and cell particulates, the latter being separable in sucrose solutions. Separation of these particulates resulted in the detection of objects identified as cell walls and “plasts.” The latter objects had an average diameter of 1.00 ± 0.05 μm and consisted of s
-
12. Preserved neuron number in the hippocampus of aged rats with spatial learning deficits.
Hippocampal neuron loss is widely viewed as a hallmark of normal aging. Moreover, neuronal degeneration is thought to contribute directly to age-related deficits in learning and memory supported by the hippocampus. By taking advantage of improved methods for quantifying neuron number, the present study reports evidence challenging these long-standing concept