Ragna Rask-Nielsen facts for kids

Ragna Marie Jenny Rask-Nielsen (1900–1998) was a smart Danish scientist who studied living things and medicine. She became a doctor in 1948 after studying how certain chemicals could cause tumors (growths) in mice. After that, she did many lab studies on tumors that produce special proteins called antibodies. In 1963, her amazing discovery about viruses that cause a type of cancer called lymphoma was shared in a famous science magazine called Nature. When she passed away at 97, she left a lot of money to help future research.

Biography

Early Life and Education

Ragna Marie Jenny Jensen was born on September 15, 1900, in a town called Skive, Denmark. Her father, Emil Carl Jensen, was a merchant, and her mother was Anna Hansen. In October 1923, she married Hans Christian Rask-Nielsen, who was a doctor. They later separated in 1944.

Ragna was an only child. Her parents were well-off and strongly supported her dreams of getting a good education. Her father was the brother of Johannes V. Jensen, who won a Nobel Prize, and Thit Jensen, a famous women's rights activist.

After finishing high school, Ragna started studying medicine at the University of Copenhagen in 1919. However, she paused her studies when she got married in 1923. She then spent her time helping her husband, Hans Rask-Nielsen, with his own medical research. She helped him with his animal experiments, even though only his name was on the published results.

Becoming a Scientist

Even though she faced personal challenges in 1944, Ragna Rask-Nielsen went back to her studies. She focused on biology and graduated in 1945. She then became an assistant at the university's Biological Institute. There, she continued her experiments and, this time, published her findings under her own name.

Her professor, Richard Ege, saw how talented she was and supported her. Thanks to his help, she earned her PhD in 1948. Her research was about how tumors developed in different parts of mice after a cancer-causing chemical was applied directly.

Important Discoveries

After getting her PhD, Rask-Nielsen kept doing research on a type of cancer called leukemia in the university's biology department. She focused on tumors that produce antibodies. She also made friends with scientists from other countries and traveled to London and the United States for her studies.

In 1963, the famous science magazine Nature published her research. This work showed that she was the first person to prove that viruses could cause lymph node cancer in animal experiments.

In 1975, her work was recognized around the world. She was featured in the magazine Cancer Research. They named her one of the two European women who had the biggest impact on basic medical research in the 20th century.

Ragna Rask-Nielsen passed away in Copenhagen on May 19, 1998.