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One 50 gallon drum of fog oil can obscure 60 miles (97 km) of land in 15 minutes. Whilst producing very large amounts of smoke relatively cheaply, these generators have a number of disadvantages. They are much slower to respond than pyrotechnic sources, and require a valuable piece of equipment to be sited at the point of emission of the smoke.
Sprayers range in size from man-portable units (typically backpacks with spray guns) to trailed sprayers that are connected to a tractor, to self-propelled units similar to tractors with boom mounts of 4–30 feet (1.2–9.1 m) up to 60–151 feet (18–46 m) in length depending on engineering design for tractor and land size.
In toxicology, the median lethal dose, LD 50 (abbreviation for "lethal dose, 50%"), LC 50 (lethal concentration, 50%) or LCt 50 is a toxic unit that measures the lethal dose of a given substance. [1] The value of LD 50 for a substance is the dose required to kill half the members of a tested population after a specified test duration.
A longtime hairdresser at Fox Sports has sued the company, alleging that she was fired after raising a series of concerns about workplace misconduct, and after repeatedly refusing to have sex with ...
The acute oral LD 50 for house sparrow (Passer domesticus) is 41 mg a.i./kg bw with a NOAEL = 3 mg a.i./kg and a NOAEL = 6 mg a.i./kg. The LD 50 s for pigeon (Columba livia) and canary (Serinus canaria) are 25–50 mg a.i./kg. Mallard ducks are more resistant to the effects of imidacloprid with a 5-day dietary LC 50 of > 4,797 ppm. The NOAEC ...
The CBS News investigation uncovered at least 50 cases of police illegally selling their weapons online, through dealers, out of their homes, or the back of their cars — in many cases at steep ...
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