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Search Results: 1 - 10 of 123535 matches for " Fer?o-Filho "
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Influence of seston quantity and quality on growth of tropical cladocerans
Fero-Filho, A. S;Arcifa, M. S.;Fileto, C.;
Brazilian Journal of Biology , 2005, DOI: 10.1590/S1519-69842005000100011
Abstract: the seston of the small, shallow, and tropical lake monte alegre was tested for quantity and quality for cladocerans by growth bioassays, which were carried out in spring (daphnia gessneri and moina micrura), summer (d. gessneri, m. micrura, ceriodaphnia cornuta, and simocephalus mixtus), and winter (d. gessneri and d. ambigua). cohorts of newborns originating from ovigerous females collected in the lake or from laboratory cultures were submitted, at a room temperature of 23oc to the following treatments: (1) the chlorophytes ankistrodesmus falcatus and/or scenedesmus spinosus; (2) lake seston; and (3) lake seston + chlorophytes. growth rate, clutch size, and fecundity were evaluated. seston alone was not the best food for promoting cladoceran growth. there were seasonal differences in food quantity and quality with spring and summer seston being better for growth than that of the winter. adding chlorophytes to the seston increased clutch size and fecundity for most species in summer and winter, but not in spring. energy limitation seems to be the most important factor influencing cladoceran growth in summer and especially in winter.
Multiple sclerosis or multiphasic disseminated encephalomyelitis? A new question about an old problem: case report
Maranh?o-Filho, Pérciles A.;
Arquivos de Neuro-Psiquiatria , 1996, DOI: 10.1590/S0004-282X1996000300024
Abstract: a 42 year-old woman developed paraplegia that resolved in six months, followed by sudden right hemiparesis and dysphasia two years later. the clinical work-up, including ct and mr scans, visual evoked potentials, csf examination and cerebral biopsy suggested the posibility of either multiple sclerosis or multiphasic disseminated encephalomyelitis. the differential diagosis between both conditions is discussed.
Effects of an Anatoxin-a(s)-Producing Strain of Anabaena spiroides (Cyanobacteria) on the Survivorship and Somatic Growth of Two Daphnia similis Clones  [PDF]
Fábio Q. de Abreu, Aloysio da S. Ferr?o-Filho
Journal of Environmental Protection (JEP) , 2013, DOI: 10.4236/jep.2013.46A002

The toxicity of an anatoxin-a(s) producer strain of Anabaena spiroides (ITEP-024) was estimated through sub-chronic bioassays with two clones of Daphnia similis (Labtox and Itajubá), both with intact cells and aqueous extracts of lyophilized material. Animals were grown as clonal cultures in the lab with mineral water plus 20% lake water. The concentrations used in the bioassays were 0.125, 0.25, 0.375, 0.50 and 1.00 mg·L-1 for intact cell cultures and 10, 25, 50 and 100 mg·L-1 for aqueous extracts. Controls with nutritive food were used. The bioassays lasted 72 hours for the aqueous extracts and 96 hours for the intact cell cultures, with measurements of survivorship every day and body length at the beginning and at the end of the bioassays. Both kinds of samples affected survivorship and growth rate of both Daphnia clones, with the intact cell samples being more effective than aqueous extracts. Regarding survivorship, the clone Itajubá was more sensitive to aqueous extracts than the clone Labtox (LC50 = 54.4 and 83.1 mg·L-1, respectively). No significant difference was found between clones in the intact cell bioassays. Regarding growth rates, a significant difference was found between clones in both samples. However, growth rate was significantly decreased in much lower concentrations of intact cells than in aqueous extracts of cyanobacteria. A stimulus of growth was found in the lower concentration (10 mg·L

Neuropareidolia: diagnostic clues apropos of visual illusions
Maranh?o-Filho, Péricles;Vincent, Maurice B.;
Arquivos de Neuro-Psiquiatria , 2009, DOI: 10.1590/S0004-282X2009000600033
Abstract: diagnosis in neuroimaging involves the recognition of specific patterns indicative of particular diseases. pareidolia, the misperception of vague or obscure stimuli being perceived as something clear and distinct, is somewhat beneficial for the physician in the pursuit of diagnostic strategies. animals may be pareidolically recognized in neuroimages according to the presence of specific diseases. by associating a given radiological aspect with an animal, doctors improve their diagnostic skills and reinforce mnemonic strategies in radiology practice. the most important pareidolical perceptions of animals in neuroimaging are the hummingbird sign in progressive supranuclear palsy, the panda sign in wilson's disease, the panda sign in sarcoidosis, the butterfly sign in glioblastomas, the butterfly sign in progressive scoliosis and horizontal gaze palsy, the elephant sign in alzheimer's disease and the eye-of-the-tiger sign in pantothenate kinase-associated neurodegenerative disease.
Metastasis to the unilateral oculomotor nucleus complex: case report
Maranh?o-Filho, Péricles;Pires, Maria Elisa Paiva;
Arquivos de Neuro-Psiquiatria , 2006, DOI: 10.1590/S0004-282X2006000300032
Abstract: this article describes a 76 years old man that, after lung cancer surgery, showed left extrinsic oculomotor paralysis and contralateral paralysis of the superior rectus muscle associated with bilateral ptosis. magnetic resonance imaging confirmed a rare situation characterized by an isolated metastasis in the region of the left third cranial nerve nucleus, probably compromising the superior rectus subnucleus and the central caudal nucleus, therefore justifying the bilateral oculomotor involvement.
Expans?o geográfica da leishmaniose visceral no Estado de Pernambuco
Dantas-Torres, Filipe;Brand?o-Filho, Sinval P.;
Revista da Sociedade Brasileira de Medicina Tropical , 2006, DOI: 10.1590/S0037-86822006000400007
Abstract: this study aimed to demonstrate the geographical expansion of visceral leishmaniasis in pernambuco state, brazil. with data on the number of visceral leishmaniasis cases notified from 1990 to 2001, maps showing the biannual evolution of the geographical distribution of the disease per municipality were elaborated. a map of the cumulative geographical distribution of the cases registered during the whole period was also constructed. from 1990 to 2001, 1,737 cases of visceral leishmaniasis were notified in pernambuco. in 1990, 15.2% (n = 28) of the municipalities notified cases of the disease. in contrast, this percentage increased to 78.3% (n = 144), over an eleven-year period. the map of cumulative geographical distribution during the whole period shows a notable concentration of cases in agreste and sert?o. a notable geographical expansion of visceral leishmaniasis in pernambuco also occurred, probably reflecting the low impact of the current control measures and, possibly, an improvement in the notification system.
Visceral leishmaniasis in Brazil: revisiting paradigms of epidemiology and control
Dantas-Torres, Filipe;Brand?o-Filho, Sinval Pinto;
Revista do Instituto de Medicina Tropical de S?o Paulo , 2006, DOI: 10.1590/S0036-46652006000300007
Abstract: in the last 20 years, despite the known underestimation of cases, brazil registered a marked increase in the incidence of visceral leishmaniasis. the main goal of this review is to reflect on some aspects of this zoonosis in brazil and also to encourage the discussion in order to find more viable, effective and affordable strategies to be implemented by the brazilian leishmaniasis control program. the current situation of visceral leishmaniasis in brazil might be seen as a paradox: the most important aspects of the disease are known, but so far the control of this disease has not yet been achieved. the current control strategies have not been able to prevent the geographical expansion, and even a rise in the incidence and lethality of visceral leishmaniasis. there is a need not only for a better definition of priority areas, but also for the implementation of a fieldwork monitoring system to the disease surveillance that could permit a further evaluation of the control program in areas where visceral leishmaniasis is endemic.
A leishmaniose visceral é uma doen a endêmica em Recife, Pernambuco?
Dantas-Torres Filipe,Brand?o-Filho Sinval Pinto
Revista da Sociedade Brasileira de Medicina Tropical , 2005,
Evaluation of the "spasticity of conjugate gaze phenomenon" in unilateral cerebral lesions
Maranh?o, Eliana Teixeira;Maranh?o-Filho, Péricles;Lima, Marco Antonio;
Arquivos de Neuro-Psiquiatria , 2007, DOI: 10.1590/S0004-282X2007000300014
Abstract: the spasticity of conjugate gaze phenomenon (scg) is a subtle motor ocular sign that usually indicates unilateral acute cerebral lesion. we analyzed the sensitivity of this sign in a prospective blinded study using 57 patients. all patients had monohemispheric brain lesions without resting deviation of the eyes and no motor complaints. fourteen individuals without cerebral lesions were included as controls. patients and controls were submitted to a brain magnetic resonance image. we observed scg in just 1/57 (sensitivity of 1.7%), while all controls had a normal bell's phenomenon. we speculate that scg may disappear over time and is not useful to diagnose a long-lasting unilateral brain lesion.
Bilateral ptosis and supranuclear downgaze paralysis
Maranh?o-Filho, Péricles;Campos, Jo?o Carlos S.;Lima, Marco A.;
Arquivos de Neuro-Psiquiatria , 2007, DOI: 10.1590/S0004-282X2007000600017
Abstract: the purpose of this article is to highlight an uncommon combination of supranuclear downward gaze paralysis with bilateral eyelid ptosis in a 53-years-old man with a radiation induced midbrain tumor and to discuss the aspects regarding the centers and pathways that mediate supranuclear vertical gaze movements.
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