Ultrastructural Observations
Mostrando 1-12 de 150 artigos, teses e dissertações.
-
1. Candida albicans morphologies revealed by scanning electron microscopy analysis
Scanning electron microscope (SEM) observations were used to analyze particular morphologies of Candida albicans clinical isolate (strain 82) and mutants defective in hyphae-promoting genes EFG1 (strain HLC52) and/ or CPH1 (strains HLC54 and Can16). Transcription factors Efg1 and Cph1 play role in regulating filamentation and adhesion of C. albicans' morphol
Braz. J. Microbiol.. Publicado em: 10/12/2013
-
2. Ultrastructural description of Ceratomyxa microlepis sp. nov. (Phylum Myxozoa): a parasite infecting the gall bladder of Hemiodus microlepis, a freshwater teleost from the Amazon River
A new ceratomyxid parasite was examined for taxonomic identification, upon being found infecting the gall bladder of Hemiodus microlepis (Teleostei: Hemiodontidae), a freshwater teleost collected from the Amazon River, Brazil. Light and transmission electron microscopy revealed elongated crescent-shaped spores constituted by two asymmetrical shell valves uni
Mem. Inst. Oswaldo Cruz. Publicado em: 2013-04
-
3. Estudo histoquímico e ultra-estrutural da distribuição das fibras da matriz extracelular na prega vocal humana fetal no período perinatal / Histochemical and ultrastructural study on the distribution of the extracellular matrix fibers in the human fetal vocal fold
It is currently believed that, in humans, the vocal ligament develops after birth. However, there is no consensus in the literature about the age of its surge. Most papers describe that in the newborn, the lamina propria shows the presence of some sparse fibers without any particular organization. The main purpose of this study was to obtain information rega
Publicado em: 2008
-
4. Análise citopatológica de células de inseto infectadas com baculovírus mutantes
Advances in cell culture techniques allowed the isolation and precise characterization of baculoviruses mutants. The majority of these mutants is derived from the virus AcMNPV, mainly due to its facility of propagation and stability in cell culture. During the purification routine of a recombinant baculovirus, two mutants derived from AcMNPV, vSynlitx1B12P (
Publicado em: 2007
-
5. Morphological studies in a model for dengue-2 virus infection in mice
One of the main difficulties in studying dengue virus infection in humans and in developing a vaccine is the absence of a suitable animal model which develops the full spectrum of dengue fever, dengue haemorrhagic fever, and dengue shock syndrome. It is our proposal to present morphological aspects of an animal model which shows many similarities with the de
Memórias do Instituto Oswaldo Cruz. Publicado em: 2006-12
-
6. Evaluation of the nutritional requirements of native forest species in their initial plant growth / Avaliação da exigência nutricional na fase inicial do crescimento de espécies florestais nativas
O projeto tem como hipótese de trabalho que as espécies florestais tem exigências nutricionais e respostas ao stress nutricional diferenciados e que a complementação nutricional é um dos principais fatores determinantes do sucesso de projetos de recuperação florestal. Este trabalho teve como objetivo avaliar as exigências nutricionais e os efeitos d
Publicado em: 2006
-
7. Programmed cell death in Trypanosoma cruzi induced by Bothrops jararaca venom
Cells die through a programmed process or accidental death, know as apoptosis or necrosis, respectively. Bothrops jararaca is a snake whose venom inhibits the growth of Trypanosoma cruzi epimastigote forms causing mitochondrion swelling and cell death. The aim of the present work was to determine the type of death induced in epimastigotes of T. cruzi by this
Memórias do Instituto Oswaldo Cruz. Publicado em: 2005-02
-
8. Reposição hormonal na prostata ventral de ratos castrados : recuperação glandular, reorganização estremal e atividade de metaloproteinases de matriz
The ventral prostate (VP) and the seminal vesic1e (SV) are both androgen dependents, in which undergoe atrophy and regrowth processes afier androgen deprivation and reposition. In both events, it was observed alterations in the epithelium as well as in the stromal compartiments. The aspects related to the prostate epithelium induced by testosterone replaceme
Publicado em: 2005
-
9. Histopathological and ultrastructural effects of delta-endotoxins of Bacillus thuringiensis serovar israelensis in the midgut of Simulium pertinax larvae (Diptera, Simuliidae)
The bacterium Bacillus thuringiensis (Bt) produces parasporal crystals containing delta-endotoxins responsible for selective insecticidal activity on larvae. Upon ingestion, these crystals are solubilized in the midgut lumen and converted into active toxins that bind to receptors present on the microvilli causing serious damage to the epithelial columnar cel
Memórias do Instituto Oswaldo Cruz. Publicado em: 2004-08
-
10. Morfologia e histoquimica do epidismo do gerbilio, Meriones unguiculatus
Epididymidis epithelium of the gerbil (Meriones unguiculatus) was focused in four distinct regions e.g., initial segment, caput, corpus and cauda of the epididymis in which were characterized five cell types: principal, apical, basal, halo and clear cells. These cells were not will characterised on1y in the thin and straight epididymal corpus that showed col
Publicado em: 2004
-
11. Effect of hydroxyurea on the intracellular multiplication of Toxoplasma gondii, Leishmania amazonensis and Trypanosoma cruzi
Toxoplasma gondii, Leishmania amazonensis and Trypanosoma cruzi are obligate intracellular parasites that multiply until lysis of host cells. The present study was undertaken to evaluate the effect of hydroxyurea (an inhibitor of cell division at the G1/S phase) on the multiplication of L. amazonensis, T. gondii, and T. cruzi in infected host cells. Infected
Brazilian Journal of Medical and Biological Research. Publicado em: 2003-01
-
12. Ultrastructural features of the midgut epithelium of females Lutzomyia intermedia (Lutz & Neiva, 1912) (Diptera: Psychodidae: Phlebotominae)
A morphological study of the midgut of Lutzomyia intermedia, the primary vector of cutaneous leishmaniasis, in southeast Brazil, was conducted by light, scanning and transmission electron microscopy. The midgut is formed by a layer of epithelium of columnar cells on a non-cellular basal lamina, under which there is a musculature, which consists of circular a
Memórias do Instituto Oswaldo Cruz. Publicado em: 2001-11