Herbet Lashinsky, 58, research professor of the Institute for Physical Science and Technology at the University of Maryland, died Tuesday at Fairfax Hospital after a heart attack. He was stricken while at a health club.

Dr. Lashinsky had been with the institute at the College Park campus since 1964. He carried out research in plasma physics and nonlinear oscillations. He lived in Bethesda.

He was born in New York City. After serving in Europe with the Army in World War II, he earned a bachelor's degree from the City College of New York.

From 1952 to 1960, he was a research assistant in physics at the Radiation Laboratory of Columbia University. He earned a doctorate from Columbia in 1961.

Dr. Lashinsky then was a research associate at the Plasma Physics Laboratory at Princeton University for three years.

During his years at Columbia and later, he served as a translator of Russian scientific literature. He was advisory publications of the American Institute of Physics. He translated from Russian "The Reviews of Plasma Physics" series, considered the best textbook source on the subject.

Dr. Lashinsky was a member of the American Physical Society and the Institute of Electrical and Electronics Engineers.

He is survived by Karen Lashinsky of New York, his daughter by a former marriage to Bertha K. Lashinsky, and by a sister, Grace Guthrie, of New York.