Atir.Strap.and.Beamd.V12.5-MAGNiTUDE — 👌🏿
Porphyromonas gingivalis, Haemophilus spp., and Prevotella intermedia in the human oropharynx of patients with periodontitis.
The oropharynx was examined by Gram stain, culture, PCR, and immunohistochemistry for bacteria associated with periodontal disease. Among 40 samples taken from patients with periodontal disease, Porphyromonas gingivalis was detected by culture and PCR in 20% of the oropharyngeal samples, whereas H. haemolyticus was found in 47% and Prevotella intermedia in 26%. Nineteen percent of the samples were positive for all three. Combined occurrence of the organisms was found in only one patient. Gram stain and immunohistochemistry did not detect P. gingivalis in any of the samples, although the limited dilutions of bacterial suspensions used for immunohistochemistry may have adversely affected the specificity of this test. There was a statistically significant correlation between the presence of P. gingivalis and P. intermedia and, to a lesser extent, H. haemolyticus.Q:
Why does the puddles of liquid form on dry concrete when placed in an oven?
I have a garden that is concrete, covered with small puddles of water from last night’s rain. I’m not sure if it’s frost that’s caused the precipitation.
When I go to bake the food I just bought at the store in an oven, the puddles disappear.
I’m confused. Why does this happen, and what can I do to prevent it?
Curing concrete is done in two stages, and the first stage is a drying process, conducted in an oven after it’s poured. The oven you have is probably set for broiling, and will bake the hot concrete to about 120°F, which should be enough to dry it out.
If the concrete is already pretty dry, there may not be much else that you can do to change that, but a good way to make sure the temperature is just right is to keep the oven at a temperature that will definitely dry it, but will not make it start to crack. For example, baking at 250°F for an hour will certainly set the concrete, but won’t cause it to start to shrink, and so may cause it to crack prematurely. But it will be close enough that the oven won’t