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The representation is made on a temperature-relative humidity, instead of a standard psychrometric chart. The comfort zone in blue represents the 90% of acceptability, which means the conditions between -0.5 and +0.5 PMV, or PPD < 10%.
The average life cycle for a house dust mite is 65–100 days. [9] A mated female house dust mite can live up to 70 days, laying 60 to 100 eggs in the last five weeks of her life. In a 10-week life span, a house dust mite will produce approximately 2,000 fecal particles and an even larger number of partially digested enzyme-covered dust ...
Dust mite allergy, also known as house dust allergy, is a sensitization and allergic reaction to the droppings of house dust mites. The allergy is common [ 1 ] [ 2 ] and can trigger allergic reactions such as asthma , eczema or itching .
Dust mites are a nesting species that prefer a dark, warm, and humid climate. They flourish in mattresses , bedding , upholstered furniture, and carpets . [ 20 ] Their feces include enzymes that are released upon contact with a moist surface, which can happen when a person inhales, and these enzymes can kill cells within the human body . [ 21 ]
Indoor mold on the head jamb of the window in a multi-story building. Indoor mold (American English) or indoor mould (British English), also sometimes referred to as mildew, is a fungal growth that develops on wet materials in interior spaces.
The change of atmospheric pressure with altitude can be obtained from this equation: [2] P a = 0.9877 a {\displaystyle P_{a}=0.9877^{a}} Given an atmospheric pollutant concentration at an atmospheric pressure of 1 atmosphere (i.e., at sea level altitude), the concentration at other altitudes can be obtained from this equation:
A stylized washtub is shown, and the number in the tub means the maximum wash temperature (degrees Celsius). A bar under the tub signifies a gentler treatment in the washing machine. A double bar signifies very gentle handling. A hand in the tub signifies that only (gentle) hand washing (not above 40 °C) is allowed.
3 comments Toggle Dust mites are the most common cause of asthma and allergic symptoms worldwide subsection