Carl Pfeiffer
Carl Pfeiffer was a renowned pharmacologist born in Germany in 1908 and passed away in the United States in 1988. His research in biochemistry and nutrition had a profound impact on the treatment of mental health and mental illness.
Carl Pfeiffer was a renowned pharmacologist born in Germany in 1908 and passed away in the United States in 1988. His research in biochemistry and nutrition had a profound impact on the treatment of mental health and mental illness.

Ernst Engel, born on March 26, 1821, and died on December 8, 1896, was a prominent German statistician. He made significant contributions to the field of statistics, particularly with his research on the Engel coefficient, which is still widely used today to measure the proportion of food expenditure in a household, an important indicator for studying consumption structure.

Claudine Schneider is an experienced American politician, known for her expertise in education and healthcare policy. Born on March 25, 1947, she served as a U.S. Representative, representing the 20th district of Pennsylvania. During her tenure in Congress, Schneider focused on promoting educational reforms and supporting healthcare policies, successfully advancing legislation aimed at improving the quality of life for American citizens.
Jeffrey Bland is a renowned author born in 1946. His works span a variety of fields, including history, science, and philosophy. Bland is known for his in-depth research and unique perspective, and his books are highly appreciated by readers.

Zafrullah Chowdhury is an individual of an unknown profession, born on December 27, 1941.

Julian Simon was an American economist known for his unique views on resource scarcity and population growth. He conducted extensive research in the field of economics, particularly in resource and population economics. Professor Simon's theories and research findings have had a profound impact on policymakers and the academic community worldwide.

Russell E. Train, born on June 4, 1920 and passed away on September 17, 2012, was a pioneer in the field of environmental protection in the United States. He served as the Administrator of the Environmental Protection Agency and was dedicated to promoting the formulation and implementation of environmental protection policies, which had a profound impact on the global environmental protection cause.

Wilbur Olin Atwater was an American chemist born on May 3, 1844, and died on September 22, 1907. He made significant contributions to the field of nutrition, particularly in the measurement of the energy value of food.
H. W. Janson, a figure born on October 4, 1913, and died on September 30, 1982. Detailed information about him is currently limited.

Limited information is available about Eric Chivian, whose profession and category are unknown.