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Pendulum clock driven by three weights as "gravity battery". An old and simple application is the pendulum clock driven by a weight, which at 1 kg and 1 m travel can store nearly 10 Newton-meter [Nm], Joule [J] or Watt-second [Ws], thus 1/3600 of a Watt-hour [Wh], while a typical Lithium-ion battery 18650 cell [2] can hold about 7 Wh, thus 2500 times more at 1/20 of the weight.
Before allergy medicine, there were a whole slew of bizarre ways to treat symptoms of what was known in the late 1800s as "hay fever." The term "allergy" didn't exist until 1906, says Theresa ...
Aquagenic urticaria, also known as water allergy and water urticaria, is a form of physical urticaria in which hives develop on the skin after contact with water, regardless of its temperature. [1] The condition typically results from contact with water of any type, temperature or additive.
Neti pots are commonly used and rely on gravity and head position in order to rinse the outer sinus cavities. Typically they have a spout attached near the bottom, sometimes with a handle on the opposite side. [4] Various squeeze bottles for nasal irrigation have also been used to apply the water. [4]
Nickel is the most common contact allergen worldwide (of people with contact dermatitis, 11.4% in Europe, 8.8–25.7% in China, and 17.5% in North America are allergic to nickel). [1] Nickel allergy, and contact allergies more generally, can develop when people are any age, but they are most likely to develop in early adulthood.
Photodermatitis, sometimes referred to as sun poisoning or photoallergy, is a form of allergic contact dermatitis in which the allergen must be activated by light to sensitize the allergic response, and to cause a rash or other systemic effects on subsequent exposure.
The test is done to assess allergies to drugs like penicillin [5] or bee venom. Skin testing on back. To ensure that the skin is reacting in the way it is supposed to, all skin allergy tests are also performed with proven allergens like histamine, and non-allergens like glycerin. The majority of people do react to histamine and do not react to ...
With millions of abandoned mines worldwide, a new study provides a compelling argument for their inclusion in a green energy future.