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The original cold weather clothing was made of furs. The fibers of the fur trapped insulating air, lanolin on the fur repelled water. Knitted wool is an effective insulator when dry, but ineffective when wet. Goose down is the lightest insulator, and still used today. Its quality, called loft is a measure of its low density. It is ineffective ...
Other cold-related injuries that can be present either alone or in combination with hypothermia include: Chilblains: condition caused by repeated exposure of skin to temperatures just above freezing. The cold causes damage to small blood vessels in the skin. This damage is permanent and the redness and itching will return with additional exposure.
stopping the wind from penetrating and replacing the layer of warm air close to the body Another important factor is humidity . Water is a better conductor of heat than air, thus if clothes are damp — because of sweat , rain, or immersion — water replaces some or all of the air between the fibres of the clothing, causing thermal loss ...
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Winter clothes are especially outerwear like coats, jackets, hats, scarves and gloves or mittens, earmuffs, but also warm underwear like long underwear, union suits and socks. [3] Military issue winter clothing evolved from heavy coats and jackets to multilayered clothing for the purpose of keeping troops warm during winter battles. [ 4 ]
The original Eau de Cologne is a spirit-citrus perfume launched in Cologne in 1709 by Giovanni Maria Farina (1685–1766), an Italian perfume maker from Santa Maria Maggiore, Valle Vigezzo. In 1708, Farina wrote to his brother Jean Baptiste: "I have found a fragrance that reminds me of an Italian spring morning, of mountain daffodils and orange ...
Bergmann's rule states that endothermic animal subspecies living in colder climates have larger bodies than those of the subspecies living in warmer climates. [11] Individuals with larger bodies are better suited for colder climates because larger bodies produce more heat due to having more cells, and have a smaller surface area to volume ratio ...
Climate change is altering the geographic range and seasonality of some insects that can carry diseases, for example Aedes aegypti, the mosquito that is the vector for dengue transmission. Global climate change has increased the occurrence of some infectious diseases. Infectious diseases whose transmission is impacted by climate change include, for example, vector-borne diseases like dengue ...