Siamese cat including the Cornish Rex, Sphynx, Peterbald, and the blue point Siamese cat. The Siamese cat comes in two distinct variations: traditional, with an apple-shaped head and a slightly chubby body; or the modern Siamese, which are very skinny and have a wedge-shaped head. Both a description and depiction of the Wichienmaat (Siamese cat) first appears in a collection of ancient manuscripts called the Tamra Maew (The Cat-Book Poems) thought to originate from the Ayutthaya Kingdom (1351 to 1767 AD). Over a dozen are now kept in the National Library of Thailand, while others have resurfaced outside of Thailand and are
Pour point depressant oils contain polyaromatic hydrocarbons and resins which act as antagonists against synthetic pour point depressants. Pour point depressants are also ineffective for engine oils with a viscosity above SAE 30. Generally they are most effective on thinner oils like SAE 10, SAE 20 or SAE 30 grade oils. Alkylaromatics and aliphatic polymers are two types of pour point depressants that are commercially available. Most commercially available pour point depressants are organic polymers, but nonpolymeric substances such as phenyltristearyloxysilane and pentaerythritol tetrastearate may also be effective. In 1981 there was a problem with lubricating oil pumpability. The same thing happened the