325 research outputs found
AnĂĄlise da associação entre Ăndices de risco ao desenvolvimento infantil e produção inicial de fala entre 13 e 16 meses
Trends in television and computer/videogame use and total screen time in high school students from Caruaru city, Pernambuco, Brazil: A repeated panel study between 2007 and 2012
The Bacterium Endosymbiont of Crithidia deanei Undergoes Coordinated Division with the Host Cell Nucleus
In trypanosomatids, cell division involves morphological changes and requires coordinated replication and segregation of the nucleus, kinetoplast and flagellum. In endosymbiont-containing trypanosomatids, like Crithidia deanei, this process is more complex, as each daughter cell contains only a single symbiotic bacterium, indicating that the prokaryote must replicate synchronically with the host protozoan. In this study, we used light and electron microscopy combined with three-dimensional reconstruction approaches to observe the endosymbiont shape and division during C. deanei cell cycle. We found that the bacterium replicates before the basal body and kinetoplast segregations and that the nucleus is the last organelle to divide, before cytokinesis. In addition, the endosymbiont is usually found close to the host cell nucleus, presenting different shapes during the protozoan cell cycle. Considering that the endosymbiosis in trypanosomatids is a mutualistic relationship, which resembles organelle acquisition during evolution, these findings establish an excellent model for the understanding of mechanisms related with the establishment of organelles in eukaryotic cells
Significados do processo de adoecer: o que pensam cuidadoras principais de idosos portadores de cĂąncer
OcorrĂȘncia de Entamoeba histolytica/Entamoeba dispar em pacientes ambulatoriais de Recife, PE
Proteolytic action of the crude extract ofDuddingtonia flagrans on cyathostomins (Nematoda: Cyathostominae) in coprocultures
Aplicação do sistema de pontuação de intervençÔes terapĂȘuticas (TISS 28) em unidade de terapia intensiva para avaliação da gravidade do paciente
Chemical composition and antimicrobial activity of essential oils of Ocimum canum Sims. and Ocimum selloi Benth.
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