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PatnaDaily Mold is ubiquitous in nature. Filamentous fungi often produce mold in indoor environments. Excessive moisture, a carbon source, a moderate temperature (25ºC), and dampness, besides other factors, are supportive elements for the growth of mold indoors. The nature and characteristics of indoor molds are much more variable. Sometimes one can see mold growth in indoor environments with the naked eye. However, it is hard to assess health and hygiene effects just by looking at it. Therefore, it is essential to study the mold in order to understand its impacts. There are a numb...

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>> it's the pattern that really nails it down to the engine oil. this is the pattern you'll find the engine oil and this is the pattern you'll find in the swab sample you took from the aircraft. >> tim has analyzed surface swabs from 40 different flights and says he almost always finds tcp. >> and on virtually all of them? you find it? >> pretty much so, yes. significant levels. >> reporter: significant, but not large. the biggest amount we found, 44 billionth of a gram. not enough to have consequence. our air samples do not show any traces of tcp. that means toxic residue has collected on the...