Electronmicroscopy
Mostrando 1-12 de 34 artigos, teses e dissertações.
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1. Criopreservação e produção de sementes sintéticas in vitro de mangabeira / Cryopreservation and in vitro synthetic seed production of mangabeira
The mangabeira is a medicinal and fruit species of the Brazilian Cerrado that presents propagation difficulties through seeds, due, mainly to the low germination rate and recalcitrance. Furthermore, it undergoes an accelerated genetic erosion process as a consequence of the extractivist exploitation. As a result, the development of alternative methodologies
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2010
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2. Removal of Cd+2 from aqueous solutions onto polypyrrole coated reticulated vitreous carbon eletrodes
The development of simple methods for removal of heavy metals from aqueous samples is a relevant field of research. In this connection, the electrodeposition of the Cd+2 ion, one of the most toxic species for animals and human beings, was investigated in aerated pH 4.8 sulfuric-sulfate solutions. In potentiostatic conditions, the maximum rate of cadmium depo
Publicado em: 2010
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3. ESTUDO MICROANALÍTICO DA PRECIPITAÇÃO DE MICRO E NANOPARTÍCULAS MAGNÉTICAS EM LIGAS DILUÍDAS DE CU-CO / MICROANALYTICAL STUDY OF MAGNETIC MICRO AND NANOPARTICLES PRECIPITATED IN DILUTE CU-CO ALLOYS
The isothermal decomposition processes of dilute Cu-Co bulk alloys have been investigated by means of analytical transmission electron microscopy. The precipitation of ferromagnetic Co particles in non-magnetic Cu matrix after aging treatments was revealed by a variety of electron-microscopy techniques: TEM diffraction contrast, high resolution electron micr
Publicado em: 2007
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4. Regeneração axonal atraves de autotransplante de retalho de musculo esqueletico obtido a partir de injeção de anestesico local
The aim of the present investigation was to study the efficacy ofaxonal regeneration after sciatic nerve cut and repair by muscle basal lamina autografts. It was done in comparison with axonal regeneration through nerve autograft. In one group of animals, muscle basal lamina autograft was obtained by injecting soleus muscle of adult ice with 2% lidocaine hyd
Publicado em: 1996
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5. A Beginner's Handbook in Biological Transmission Electronmicroscopy
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6. Studies on the structure of autonomic nerves in the small intestine, correlating the silver-impregnated image in light microscopy with the permanganate-fixed ultrastructure in electronmicroscopy*
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7. Schwannoma with features mimicking neuroblastoma: report of two cases with immunohistochemical and ultrastructural findings.
OBJECTIVE: A study of two cases of a rare variant of benign schwannoma showing areas mimicking neuroblastoma/peripheral primitive neuroectodermal tumour (PNET). METHODS: Sections of formalin fixed, paraffin embedded specimens were studied by tinctorial stains and immunohistochemistry, and the tissue retrieved from formalin was examined by electronmicroscopy
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8. The syndrome of `continuous muscle-fibre activity' cured: further studies
Two cases suffering from the syndrome of `continuous muscle-fibre activity' have been followed-up for 14 years. These patients have gradually gone into remission and no longer require therapy. The results of recent histology, histochemistry, and electronmicroscopy, as well as sural nerve biopsy studies, are presented. The sarcoplasmic reticulum calcium bindi
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9. Intraneural neurofibromas involving the posterior interosseous nerve
Two patients presented with a posterior interosseous nerve palsy with supinator weakness. In each case an intraneural neurofibroma was found proximal to the supinator tunnel with no other stigmata of von Recklinghausen's disease. Both tumours showed a whorl-like histological pattern that has been previously confused with onion-bulb structures in hypertrophic
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10. Myasthenia gravis: further electrophysiological and ultrastructural analysis of transmission failure in the mouse passive transfer model.
Using the mouse passive transfer model the mean amplitude of miniature endplate potentials and endplate potentials of mice treated with myasthenic immunoglobulins was markedly decreased. Miniature endplate potential frequency and quantum content of endplate potentials were normal, arguing against a major presynaptic disarrangement. Under electron-microscopy
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11. Subacute spongiform encephalopathy and its relation to Jakob-Creutzfeldt disease: report on six cases
An account is given of six cases of Jakob-Creutzfeldt disease confirmed at necropsy. The rapid fatal outcome within three months was typical of the variety designated subacute spongiform encephalopathy (Nevin-Jones). The characteristic EEG changes were found to be of great value in making an early diagnosis and, together with akinetic mutism and myoclonus, c
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12. Detection of rotavirus by serological trapping on antibody-coated electron microscope grids.
A serological trapping technique for detecting rotaviruses is described which involves coating electron microscope grids with protein A and specific rotavirus antiserum. The presence of a layer of antibodies on the grid increases the number of rotavirus particles that can be visualized. Thirty-five crude fecal extracts from infants suffering from diarrhea we