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Search Results: 1 - 10 of 1456 matches for " ALENCAR "
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Panencefalite subaguda esclerosante (SSPE) de longa evolu??o
Alencar, Alexandre;
Memórias do Instituto Oswaldo Cruz , 1975, DOI: 10.1590/S0074-02761975000200005
Abstract: this article relates a case of subacute sclerosing panencephalitis (sspe) with special characteristics. the patient was a young male, eight years old. the disease progressed slowly over a period of several years terminating in death six years ofter the initial symptoms. histopathologic examination revealed an encepahilitic process in evolution, with microgranulomes, perivascular inflammatory infiltrates, areas of neuronophagia, and intranuclear acidophilic inclusions in oligodendroglial cells. the cerebral white matter presented massive areas of demyelination, with astroglial cells undergoing an abnormal hyperplastic reaction with great nuclear atypias. this case, therefore, presented the histopathological picture of a chronic viral infection of several years' duration. since it has been demonstrated already that viruses of the papova group may play a role in sspe, it is possible that in this instance there may have been participation by papova viruses, due to the intense astroglial atypias found in the demyelinated areas.
Germinomas cerebrais (teratomas atípicos da pineal)
Alencar, Alexandre;
Memórias do Instituto Oswaldo Cruz , 1981, DOI: 10.1590/S0074-02761981000400001
Abstract: three cases of cerebral germinomas, one of them situated in the pineal region (topical) and two ectopical of the so called suprasellar or chiasmal germinomas are studied. these last ones may be more aggressive than the congeneral topical ones, since besides it's dissemination throughout the basal cisternas they usually infilstrate into de walls of the iii ventricle, fornix, hypothalamus, chiasma and optic nervs. a high level of proteins in the spinal fluid without proportional increase of the cells is characteristic. globulins are the predominant fraction of the increased spinal fluid proteins, as indicated by the highly positive laboratory test. these globulins are possibly produced by the lymphocytes which are part of this neoplasm. the high level of protein in the spinal fluid without proportional increase of the cells, in the presence of intracranial syndrome in a child or adolescent, with anatomical signs of basal localization make the possibility of a chiasmal germinona highly probable.
Aspectos morfológicos da neurossecre??o hipotalamica no homem
Alencar, Alexandre;
Memórias do Instituto Oswaldo Cruz , 1980, DOI: 10.1590/S0074-02761980000100001
Abstract: the author perfomed a histological study of the anterior region of the human hypothalamus staining with chrome hematoxylin and silver carbonate in order to compare the results obtained by both methods. the two stains produced similar results. however, it was found that the silver carbonate impregnation should not be used exclusively, but should always be checked with chrome hematoxylin. the second part of this paper deals with the degeneration of the terminal portions of the nerve fibers of the supra-optical-hypophyseal tract, with formation of the socalled "herring bodies". the neurons are thought to function as a type of neuroglandular cell, whose production of secretions coincides with the dissolution of the cells's apical pole.
Doen?a de Krabbe (Leucodistrofia de células globóides)
Alencar, Alexandre;
Memórias do Instituto Oswaldo Cruz , 1972, DOI: 10.1590/S0074-02761972000300006
Abstract: apresenta??o de um caso de "doen?a de krabbe" (leucodistrofia de células globóides). tratava-se de uma crian?a do sexo feminino, com 3 anos de idade. iniciaram-se seus padecimentos com a idade de 2 anos e meio, com apatia, irritabilidade e dificuldade progressiva no falar. ao dar entrada no hospital apresentava-se tetraplégica, com "genun recurvatum". membros inferiores em extens?o, amaurose. reflexos profundos exaltados. morte após alguns mese, em caquexia. o exame anátomo-patológico mostrou desmieliniza??o completa da substancia branca cerebral, com conserva??o das fibras subcorticais ditas "em u". dilata??o uniforme e global do sistema ventricular. atrofia cortical. microscopicamente constatou-se a presen?a de grupos celulares especiais, constituídos por células arredondadas, volumosas, muitas vezes polinucleadas, formando grupos esparsos ou concnetradas nos espa?os perivasculares. presen?a no citoplasma destas células de granula??es p.a.s. positivas, insolúveis nos solventes de gorduras e coráveis pelos sudans iv e b. esta substancia p.a.s. positiva foi também encontrada nos interstícios do tecido, nos espa?os perivasculares (dentro e fora de histiocitos) e no interior de vasos sanguíneos. a história familiar da paciente revelou a existência de um irm?o, falecido com quadro semelhante, aproximadamente na mesma idade. quatro outros irm?os, falecidos de causas várias, também crian?as, possivelmente n?o eram normais.
Implanta??o intracerebral experimental de sarcomas
Alencar, Alexandre;
Memórias do Instituto Oswaldo Cruz , 1972, DOI: 10.1590/S0074-02761972000400004
Abstract: histopathological study of intracerebral implantation of sarcomas, performed in rats (fibrosarcomas) and mice (sarcoma 180). the intracerebral implantation of fibrosarcoma has developed in about 45 days a well limited tumor, with little infiltration of the adjacent nervous parenchyma, never streading to longer distances because the strong cohesion between its cells, with great differentiation of reticular fibers and collagen. on the contrary, the innoculation of sarcoma 180, chiefly of the ascitical form, has rapidly lead to a strong intracranial hipertension, with dissemination of neoplastic cells through the subarachnoid and intraventricular spaces. both neoplasies were extending through the perivascular spaces, but in different ways: the sarcoma 180 had a very strong and rapid dissemination to long distances, while the fibrosarcoma disseminated only to the vessels adjacent develloping tumor. based on personal observations and on specialized bibliography, we concluded that the etiological agents of these tumors exerts their action on different cellular strains.
Quando sons e imagens s o equivalentes
Alencar, Marli
Sess?es do Imaginário , 2003,
Abstract: A televis o é o primeiro meio audiovisual em que som e imagem vieram juntos desde o come o. O cinema, apesar de sempre ter buscado suprir essa sua deficiência, só conseguiu isto na década de 20. Até ent o o som vinha do fonógrafo, de uma orquestra ou das palavras do apresentador ou mestre-de-cerim nia.
Emergência de flebotomíneos (Diptera: Psychodidae) em ch?o de floresta de terra firme na Amaz?nia Central do Brasil: uso de um modelo modificado de armadilha de emergência
Alencar, Ronildo Baiatone;
Acta Amazonica , 2007, DOI: 10.1590/S0044-59672007000200016
Abstract: information concerning the potential natural breeding sites of phlebotomine sandflies are of high epidemiological importance. however, few studies have been conducted on the subject. this is due especially to the difficulties in finding as well as extracting immature sandflies that develop in the soil and organic matter of the forest floor. in the present study, a modified emergence trap model was tested in order to find potential breeding sites. this model was tested in the pitinga village, situated in the presidente figueredo municipality, in the state of amazonas. twenty-seven individuals belonging to nine species (lutzomyia umbratilis,l. monstruosa,l. ayrozai,l. anduzei,l. trichopyga,l. davisi,l. geniculata,l. georgii e l. saulensis.) were collected. lutzomyia umbratilis showed the highest number of individuals (37.1%) of all species captured in the area. the phlebotomine productivity was estimated as 2.2 sandflies per 100 m2/day. september showed the highest density of individuals, with a productivity of 5.8.
A política de perto: recortes etnográficos de campanhas eleitorais
Barreira, Irlys Alencar Firmo;
Novos Estudos - CEBRAP , 2006, DOI: 10.1590/S0101-33002006000100011
Abstract: taking ethnographical notes and the concept of ritual as a guideline, this article discusses electoral acts in northeastern capitals in brazil. the main argument sustains that acts of campaign bring near what is understood as politics and the electors, making possible the presentation of opponents and redefining social pacts that validate the principles of political representation.
O impacto da mobilidade de renda sobre o bem-estar econ?mico no Brasil
Figueiredo, Erik Alencar de;
Economia Aplicada , 2009, DOI: 10.1590/S1413-80502009000300007
Abstract: the study of figueiredo e ziegelmann (2007) showed that in brazil there was a gain in welfare related to increasing of income mobility. however, this results did not consider one of the side effects related to this phenomenon: the increase of uncertainty associated to the behavior of consumption. according to this approach, this study questions how desirable is the income mobility in brazil. it was used an index that separates the negative and positive effects related to mobility. the results showed, considering a coefficient of risk aversion, that an increase of income mobility will have positive effects only if the inequality parameter is superior to 2.95.
Donatus: uma interface amigável para o estudo da sintaxe formal utilizando a biblioteca em Python do NLTK
Alencar, Leonel Figueiredo de;
Alfa : Revista de Linguística (S?o José do Rio Preto) , 2012, DOI: 10.1590/S1981-57942012000200008
Abstract: this paper firstly aims at showing the usefulness of cfg and fcfg in the study of formal syntax. applying parsers based on these formalisms on the analysis of a corpus may reveal consequences from an approach which would otherwise pass by unnoticed. the natural language toolkit (nltk) comprises, among other facilities, generator tools for parsers in a variety of architectures. however, the non-trivial use of this library in automatic syntactic processing requires programming skills. in order to allow non-programmers access to parser implementation and testing, we developed donatus, a user-friendly graphical interface to nltk's parsing facilities with additional utilities that make it also useful to programmers. we explain the tool's functioning and demonstrate its relevance to formal syntactical investigation by means of a comparison between the computer implementations of two alternative approaches to adjectival modification in portuguese. the first approach, based on traditional x-bar theory, generated a great number of false ambiguities. this problem was avoided by a parser based on an approach within the minimalist program. without resorting to the computer, this difference between the two approaches would not be easily revealed.
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