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![]() Science Department Chair J.R. Masterman School 17th and Spring Garden Streets Philadelphia Pa, 19130 telephone: (215)-299-4661 e-mail address: rweerasooriya@phila.k12.pa.us Subjects: AP Chemistry and Honors Chemistry ![]() Dr. Ranjini Weerasooriya and her students with the secretary of commerce and technology-Mr.Philip Bond at the nanotechnology conference in Philadelphia. Nanotechnology - Evolution and Revolution Keynote Address |