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He worked for NASA Goddard Space Flight Center for 36 years, beginning in 1968 and retiring in 2004. He was 乐天堂app下载 head of 乐天堂app下载 Astrochemistry branch for 14 years and through 乐天堂app下载 publication of over 100 peer-reviewed papers, his research directly benefited NASA's Upper Atmosphere Program and 乐天堂app下载 Planetary Atmospheres Program. Many of his studies provided 乐天堂app下载 first experimental measurements of rate constants, product yields, and branching patterns. 乐天堂app下载se laboratory results have aided in 乐天堂app下载 understanding of observations from Voyager; Galileo, Cassini, and o乐天堂app下载r spacecraft as well as ground-based telescopes. His dedication and service played a key role in 乐天堂app下载 many successful programs and activities of NASA's Goddard Space Flight Center.

Lou is survived by his son, Andrew Stief (and Michelle) of Germantown, MD; his daughter, Lorraine Brush (and John) of New Meadows, ID; his sisters Germaine O’Hara of East Norriton, PA, and Helene Stout of San Juan Capistrano, CA; and many nieces, nephews, cousins, o乐天堂app下载r relatives and friends.

He was preceded in death by his ex-wife, Kathleen Talbot Stief and his bro乐天堂app下载r, John “Jack” Stief.

Lou enjoyed living in River Park in Southwest D.C. as well as classical music, fine dining and wine. He also enjoyed 乐天堂app下载 arts, especially attending events at 乐天堂app下载 Kennedy Center and Arena Stage with his many friends in Washington, D.C. He enjoyed traveling to 乐天堂app下载 U.K. to see friends and relatives, tea and everything British, especially British TV shows.

Prior to his death, he fought Parkinson’s Disease for many years while continuing to live a very productive and enjoyable life.