Diffusion Chambers
Mostrando 1-12 de 69 artigos, teses e dissertações.
-
1. SURVIVAL, INDUCTION AND RESUSCITATION OF Vibrio cholerae FROM THE VIABLE BUT NON-CULTURABLE STATE IN THE SOUTHERN CARIBBEAN SEA
The causative agent of cholera, Vibrio cholerae, can enter into a viable but non-culturable (VBNC) state in response to unfavorable conditions. The aim of this study was to evaluate the in situ survival of V. cholerae in an aquatic environment of the Southern Caribbean Sea, and its induction and resuscitation from the VBNC state. V. cholerae non-O1, non-O139
Rev. Inst. Med. trop. S. Paulo. Publicado em: 2015-02
-
2. Sobre a influência de fatores ambientais nos níveis de radônio em cavernas dos Parques Estaduais do Vale do Ribeira, SP e avaliação do equilíbrio radioativo e fator de equilíbrio entre radônio e seus descendentes / On the influence of environmental factors on radon levels in caves of Ribeira Valley State Parks, SP and evaluation of radioactive equilibrium and equilibrium factor between radon and its progeny
In the present study it was carried out the monitoring of radon in caves distributed among three state parks of Sao Paulo. The radon concentration were determinate in Morro Preto and Santana caves, located at PETAR Parque Estadual Turístico do Alto Ribeira (High Ribeira River Tourist State Park), Diabo cave, situated in PEJ Parque Estadual de Jacupiranga (J
Publicado em: 2011
-
3. Aspectos do comportamento de gás metano dissolvido na água de reservatórios brasileiros / Aspects of dissolved methane behavior in water bodies of brazilian reservoirs
Extended water bodies such as the hydroelectric reservoirs here studied can be greenhouse gas sources ( CH IND.4 and CO IND.2 ) due to decay of part of submerged forest biomass and also due to allochtonous and autochtonous organic compounds. This work presents concentrations, ebullitive and diffusive fluxes of the gases dissolved in the water column in the f
Publicado em: 2004
-
4. A alternancia de [ei]~[e] no portugues falado na cidade de Caxias, MA
Abstract: This study discusses the monophthongization of the diphthong [eI] to [e] in the "I portuguese language spoken in Caxias, a city in Maranhão, in the light of the Variation Theory (cf Labov, 1972, 1994; Sankoff, G., 1982; Sankoff, D., 1988; Tarallo, 1994a; Chambers, 1995; Mollica, 1998; CalIou et alii, 1998), and of the recent proposals of phonologi
Publicado em: 1999
-
5. Estudo analitico da componente hadronica de superfamilias da radiação cosmica detectadas em camaras de emulsão nuclear
Solutions of the one-dimensional diffusion equation for the hadronic cascade induced by one single nucleon in the atmosphere are obtained, assuming constant nucleonic and pionic interaction mean-free-paths. By mean of these solutions, it is possible to describe analytically cosmic- ray events detected in emulsion chambers, having total visible hadronic energ
Publicado em: 1993
-
6. Cellular Responses of Mice to Diffusion Chambers I. Reactions to Intraperitoneal Diffusion Chambers Containing Listeria monocytogenes and to Bacteria-Free Chambers
Diffusion chambers made with membranes having a pore size of 0.22 μm were implanted in the peritoneal cavities of mice. Chambers that contained no cells induced splenic lymphoreticular hyperplasia and a proliferation of fibroblasts around the chambers. When the chambers contained the bacterium, Listeria monocytogenes, there was strong and continuous chemota
-
7. Mutation of Listeria monocytogenes After Prolonged In Vivo Survival in Diffusion Chambers
Listeria monocytogenes remained viable when confined in diffusion chambers in the peritoneal cavities of mice. Bacterial survival was associated with mutations.
-
8. Cellular Immunity of Mice Infected with Listeria monocytogenes in Diffusion Chambers
The importance of bringing live bacteria into intimate contact with macrophages as a prerequisite for establishing cellular immunity was investigated. The bacterium Listeria monocytogenes was shown to replicate and survive in diffusion chambers implanted in the peritoneal cavities of mice. Humoral substances accruing from host responses to diffusing soluble
-
9. Modification of Membrane Diffusion Chambers for Deep-Water Studies
Membrane diffusion chambers as modified for deep-water lakes provided an improved handling ease, freedom from external damage, extended sampling life, good diffusivity, and excellent statistical reproducibility.
-
10. Concentrations of various antibiotics in serum and fluids accumulated in diffusion chambers implanted in various sites in rabbits.
Diffusion chambers with Millipore membranes were implanted in soft tissue, kidneys, and peritoneal and pleural cavities of rabbits. Single doses of azlocillin, cefazolin, and gentamicin were injected intramuscularly and ampicillin was administered orally 2--5 weeks after implantation. The concentrations of the respective drugs in simultaneously collected sam
-
11. Survival of Natural Sewage Populations of Enteric Bacteria in Diffusion and Batch Chambers in the Marine Environment
The survival of natural populations of Escherichia coli and enterococci in sewage was measured in large-volume diffusion chambers in an estuary and a salt marsh. The 5-liter chambers, with polycarbonate membrane sidewalls, were found to be suitable for up to week-long experiments. Decay rates, measured monthly from February to August 1978, ranged from 0.042
-
12. Growth of Mycobacterium lepraemurium in Cell-Impermeable Diffusion Chambers
Successful growth of Mycobacterium lepraemurium has been achieved by use of a specialized diffusion chamber technique. The cell-impermeable porous chambers were maintained in animals for periods up to 50 days with and without macrophages and LM cells. A generation time of 6 to 8 days was found for the acid-fast bacilli in chambers containing macrophages when