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P-20: A P-15 updated with the new guidance system but with the original shorter range. They were perhaps known as SS-N-2B and used by Komar and Osa class boats. P-20K: A P-15M with a new guidance system. P-20M: A surface version of the P-20L with folding wings. This was the definitive version of the P-15M with radar guidance.
In 1931, von Euler and Gaddum discovered substance P (SP) in horse brain and intestine. The substance showed strong vasodilatory effects and contractile activity on the rabbit gut. A great effort was put into purifying this substance from diverse mammalian tissue, but 30 years of research were without success.
The lead–acid battery is a type of rechargeable battery first invented in 1859 by French physicist Gaston Planté.It is the first type of rechargeable battery ever created.
Carlos Alberto Torres (born September 19, 1952) is a militant Puerto Rican nationalist. [1] He was convicted and sentenced to 78 years in a U.S. federal prison for seditious conspiracy, conspiring to use force against the lawful authority of the United States. [2]