pollen count - définition. Qu'est-ce que pollen count
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Qu'est-ce (qui) est pollen count - définition

METHOD FOR QUANTIFYING AIRBORNE POLLEN
Rotorod sampler; Rotorod Sampler (scientific device); Pollen counting; Burkard trap
  • [[Bright-field microscopy]] images of pollen grains from a variety of plants. Magenta-colored specimens have been stained with [[fuchsine]].

pollen count         
(pollen counts)
The pollen count is a measure of how much pollen is in the air at a particular place and time. Information about the pollen count is given to help people who are made ill by pollen.
Avoid trips to the country while the pollen count is high.
N-COUNT
pollen count         
¦ noun an index of the amount of pollen in the air.
Rotorod sampler         
The Rotorod sampler is a scientific instrument that is used for collecting pollen grains and fungus spores from the atmosphere.

Wikipédia

Pollen count

A pollen count is a measurement of the number of pollen grains in a given volume of air. Pollen counts, and forecasts of pollen conditions, are routinely produced and reported to the public because high aerial pollen concentration is associated with increased rates of allergic reaction for those with conditions such as hay fever and asthma. The pollen counted are usually identified to family; particularly families with hyperallergenic pollen (e.g. grasses, family Poaceae) and families that are prevalent in the relevant area. Thunderstorm asthma events as well as mild winters with warmer days lead to increases in pollen counts, while colder winters lead to delayed pollen release. Though not pollen, hyperallergenic fungal spores such as those of Alternaria may be counted as well.

Exemples du corpus de texte pour pollen count
1. Laura has the sniffles – the pollen count is high this morning.
2. Students in London were affected even on moderate pollen count days.
3. The highest achievers also showed the greatest tendency for reduced marks on high pollen count days.
4. Wet weather tends to reduce the pollen count, so hayfever sufferers will rejoice. 6.
5. The researchers found that 53% had their lowest mark on the day with a medium pollen count.