Laser Hosts
Mostrando 1-12 de 12 artigos, teses e dissertações.
-
1. Helmintofauna de Columba livia (Aves, Columbidae), no município de Juiz de Fora, Minas Gerais, Brasil: aspectos da ecologia, morfologia e sistemática
The aim of the present study was to obtain data on helminth fauna in Columba livia, in municipality of Juiz de Fora, Minas Gerais, Brasil; to describe the structure of the helminth infracommunities present in this host and to clarify questions concerning morphology, sistematics and ecology of some of the component species. The helminthological study of 35 ho
Publicado em: 2007
-
2. Amplified spontaneous emission of proton transfer dyes in polymers
We compare the Amplified Spontaneous Emission (ASE) of the proton transfer dyes 2-(2'-hydroxyphenyl) benzimidazole (HPBI) and 2-(2'-hydroxy-5'-chlorphenyl)benzimidazole (Cl-HPBI) in three different polymeric hosts under UV pulsed laser excitation. Pulseform and degradation of the dyes in the solid polymers were analysed. Spectroscopic data were used in a sim
Brazilian Journal of Physics. Publicado em: 2005-12
-
3. CRESCIMENTO E CARACTERIZAÇÃO DE FIBRAS MONOCRISTALINAS DE FLUORETOS DO TIPO LiY1-xTRxF4 (TR = TERRAS-RARAS) / GROWTH AND CHARACTERIZATION OF FLUORIDE CRYSTALLINE FIBRES TYPE LiY1-xTRxF4 (RE = RARE-EARTH)
In this work we present the growth and characterization of LiF and pure and rare-earth doped (Er and Nd) yttrium-lithium tetra-fluoride (LiYF4 or YLF) by the micro-pulling-down technique (µ-PD). The use of this technique is original for the present purpose. A m-PD prototype in the resistive mode was firstly built to understand the most important operational
Publicado em: 2005
-
4. Caracterização espectroscópica de possíveis meios ativos para lasers de Nd3+ e Tm3+ / Spectroscopic characterization of possible Nd3+ and Tm3+ laser active media
In this work we have made an important contribution to the growing research of new laser materials that can be pumped by low cost diode lasers or by the Upconversion process to operate in the near-infrared and visible spectral regions. Three kinds of hosts, doped with the rare earth ions (Nd3+ and Tm3+) were studied, and they present potential characteristic
Publicado em: 2003
-
5. Delayed-type hypersensitivity to Phlebotomus papatasi sand fly bite: An adaptive response induced by the fly?
The saliva of bloodsucking arthropods contains a large array of pharmacologically active compounds that assist hematophagy. Arthropod saliva is also responsible for causing uncomfortable allergic responses in its vertebrate hosts. In this article, we investigate whether the sand fly Phlebotomus papatasi, known to produce a strong delayed-type hypersensitivit
National Academy of Sciences.
-
6. Intracellular Actinobacillus actinomycetemcomitans and Porphyromonas gingivalis in Buccal Epithelial Cells Collected from Human Subjects
The mouth may provide an accessible model for studying bacterial interactions with human cells in vivo. Using fluorescent in situ hybridization and laser scanning confocal microscopy, we found that human buccal epithelial cells from 23 of 24 subjects were infected with intracellular bacteria, including the periodontal pathogens Actinobacillus actinomycetemco
American Society for Microbiology.
-
7. In Situ Detection of Novel Bacterial Endosymbionts of Acanthamoeba spp. Phylogenetically Related to Members of the Order Rickettsiales
Acanthamoebae are ubiquitous soil and water bactivores which may serve as amplification vehicles for a variety of pathogenic facultative bacteria and as hosts to other, presently uncultured bacterial endosymbionts. The spectrum of uncultured endosymbionts includes gram-negative rods and gram-variable cocci, the latter recently shown to be members of the Chla
American Society for Microbiology.
-
8. Identification of an Iron-Regulated, Hemin-Binding Outer Membrane Protein in Sinorhizobium meliloti
Rhizobia are soil bacteria that are able to establish symbiotic associations with leguminous hosts. In iron-limited environments these bacteria can use iron present in heme or heme compounds (hemoglobin, leghemoglobin). Here we report the presence in Sinorhizobium meliloti of an iron-regulated outer membrane protein that is able to bind hemin but not hemoglo
American Society for Microbiology.
-
9. Evidence that hsp90 Is Involved in the Altered Interactions of Acanthamoeba castellanii Variants with Bacteria
There are many similarities between the interactions of environmental protozoa with pathogenic bacterial species and those observed in mammalian macrophages. Since single-celled protozoa predate mammalian hosts, it is likely that interactions in environmental biofilms have selected for many of the bacterial virulence mechanisms responsible for human disease.
American Society for Microbiology.
-
10. Induction of a Gradual, Reversible Morphogenesis of Its Host’s Epithelial Brush Border by Vibrio fischeri
Bacteria exert a variety of influences on the morphology and physiology of animal cells whether they are pathogens or cooperative partners. The association between the luminous bacterium Vibrio fischeri and the sepiolid squid Euprymna scolopes provides an experimental model for the study of the influence of extracellular bacteria on the development of host e
American Society for Microbiology.
-
11. The impact of parietal cells on Helicobacter pylori tropism and host pathology: An analysis using gnotobiotic normal and transgenic mice
Helicobacter pylori infection of the human stomach is common and typically benign, although a subset of hosts develops severe pathology. Infection occurs in an organ with distinct microenvironments characterized by pronounced differences in the composition of acid-producing parietal cells. In this study, we examine determinants of bacterial tropism to variou
The National Academy of Sciences.
-
12. LcrV of Yersinia pestis Enters Infected Eukaryotic Cells by a Virulence Plasmid-Independent Mechanism
Yersinia pestis is the causative agent of bubonic plague and possesses a set of plasmid-encoded, secretable virulence proteins termed LcrV and Yops which are essential for survival in mammalian hosts. Yops and LcrV are secreted by a type III mechanism (Ysc), and Yops are unidirectionally targeted into the cytosol of associated eukaryotic cells in a tissue cu
American Society for Microbiology.