1 A video produced by Washington DC's American Chemical Society reveals the science behind why dogs smell each other.2  It's revealed that they do this to find out information about other dogs. 3  Glands in a dog's behind secretes chemicals that can reveal key information.hare this article. Share. They found that on the rear-end of the dog is an area called the anal sac, which excretes identifying chemicals to other dogs. One of the glands here is the apocrine gland, which gives the dog its natural smell.
Valerian (Valeriana officinalis, Caprifoliaceae) is a perennial flowering plant, with heads of sweetly scented pink or white flowers that bloom in the summer. Valerian flower extracts were used as a perfume in the 16th century. Native to Europe and parts of Asia, valerian has been introduced into North America.The flowers are frequently visited by many fly species, especially hoverflies of the genus Eristalis.rude extract of valerian root is sold as a dietary supplement in the form of capsules. Valerian root may have sedative and anxiolytic effects. The amino acid valine is named after this plant.
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