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A study conducted by measuring the intraoral vapour levels over a 24-hour period in patients with at least nine amalgam restorations showed that the average daily dose of inhaled mercury vapour was 1.7 μg (range from 0.4 to 4.4 μg), which is approximately 1% of the threshold limit value of 300 to 500 μg/day established by the WHO, based on a ...
Amalgam filling on first molar. In dentistry, amalgam is an alloy of mercury used to fill teeth cavities. [1] It is made by mixing a combination of liquid mercury and particles of solid metals such as silver, copper or tin.
The picture of the day (POTD) is a section on the English Wikipedia's Main Page that is automatically updated every day with one or more featured pictures, accompanied by a blurb. Although it is generally scheduled and edited by a small group of regular editors, anyone can contribute.
Sodium amalgam is produced as a byproduct of the chloralkali process and used as an important reducing agent in organic and inorganic chemistry. With water, it decomposes into concentrated sodium hydroxide solution, hydrogen and mercury, which can then return to the chloralkali process anew.
In the philosophy of mind, Leibniz's gap is the problem that thoughts cannot be observed or perceived solely by examining brain properties, events, and processes. Here the word "gap" is a metaphor of a subquestion regarding the mind–body problem that allegedly must be answered in order to reach a more profound understanding of qualia, consciousness and emergence.
Val Kilmer is stepping back into the spotlight. The "Top Gun" actor made a very rare public appearance on Monday at a charity basketball game, where he wore a button-down shirt painted with the ...
The combination of dopamine, serotonin and oxytocin is already pretty dreamy, but the brain takes that natural high to the next level when you reach the big O by releasing endogenous (i.e., made ...
Some plaques occur in the brain as a result of aging, but large numbers of plaques and neurofibrillary tangles are characteristic features of Alzheimer's disease. [5] The plaques are highly variable in shape and size; in tissue sections immunostained for Aβ, they comprise a log-normal size distribution curve, with an average plaque area of 400 ...