Obituaries of residents from the District, Maryland and Northern Virginia.

Daniel Sharp, health physicist

Daniel Sharp, 63, a health physicist with the Agriculture Department and earlier with what became the National Institute of Standards and Technology, died Sept. 14 at a hospital in Bethesda, Md. The cause was heart disease, said a brother, David Sharp.

Mr. Sharp, a resident of Gaithersburg, Md., was born in Covington, Va. He moved to the Washington area in 1978. He worked at the National Bureau of Standards for eight years and at the USDA for 26 years in the radiation safety division before retiring in 2016.

In 1981, at the age of 26, he received a kidney transplant, using a kidney donated by his brother David.

Michael Pistole, physician

Michael Pistole, 70, a physician who had a private practice in Washington since 1982 and also practiced in free clinics and served on the board of the health-care company MedStar, died Sept. 26 at a hospital in Washington. The cause was pneumonia and pulmonary complications, said his husband, Richard Bradshaw.

Dr. Pistole, a resident of Crownsville, Md., was born in San Gabriel, Calif. He had an internal medicine practice, and his specialties included gastroenterology and hepatology. He treated many AIDS patients and other patients in community centers of Unity Health Care.

Clark Collins, Interior Dept. manager

Clark Collins, 68, who retired in 2007 as a computer specialist and information resource manager at the Interior Department, died Oct. 12 at his home in Silver Spring, Md. The cause was congestive heart failure and complications from kidney failure, said a brother-in-law, Washington Post columnist Eugene Robinson.

Mr. Collins, a Baltimore native, began his federal career in 1976 as a computer specialist/statistician at the Health Resources and Services Administration of what became the Department of Health and Human Services. Later he worked at the National Institutes of Health before joining the Interior Department in 1992. In retirement, he was an independent information systems consultant.

Ruth Nadel, feminist activist

Ruth Nadel, 103, a feminist who was active in women’s rights organizations in Washington and California, died Sept. 25 at her home in Northridge, Calif. The cause was a brain tumor, said a granddaughter, Dana Foley.

Mrs. Nadel was born Ruth Rosoff in New York City and participated in feminist and political organizations in Santa Barbara, Calif., before moving to Washington in 1967. From then until retiring in 1989, she served in the Labor Department’s women’s bureau specializing in dependent care and rights for working families.

In retirement, she served in a variety of unpaid positions, including co-chair of the National Council of Women’s Organizations’ global women’s issues task force, the League of Women Voters and the D.C. Commission on Aging. At 100, she moved to California from the District.

Saduddin Shpoon, VOA broadcaster

Saduddin Shpoon, 84, a Voice of America radio and television broadcaster and a scholar and teacher in the Pashto language of his native Afghanistan, died Sept. 10 at a hospice center in Aldie, Va. The cause was chronic obstructive pulmonary disease, said a daughter, Durkhanai Alami.

Mr. Shpoon, a resident of Woodbridge, Va., was born in Kunduz, Afghanistan. He settled in the United States permanently in 1983 and worked at VOA from 1983 until retiring in 2005.

— From staff reports