В течение 1930-х годов предпринимал

В течение 1930-х годов предпринимались безуспешные попытки улучшить качество пенициллина и других антибиотиков, научившись получать их в достаточно чистом виде. Первые антибиотики напоминали большинство современных противораковых препаратов — было неясно, убьет ли лекарство возбудителя болезни до того, как оно убьет пациента. И только в 1938 году двум ученым Оксфордского университета, Говарду Флори (Howard Florey, 1898-1968) и Эрнсту Чейну (Ernst Chain, 1906-79), удалось выделить чистую форму пенициллина.

Результаты (английский) 1:

During the 1930-ies, there have been unsuccessful attempts to improve the quality of penicillin and other antibiotics, learning to get them in a sufficiently pure form. The first antibiotics resembled most of today's anti-cancer drugs — it was unclear whether the medicine kills the pathogen of the disease before it kills the patient. And only in 1938 year two scientists at the University of Oxford, Howard Florey (Howard Florey, 1898-1968) and Ernst Čejnu (Ernst Chain, 1906-79), succeeded in isolating the pure form of penicillin.

Результаты (английский) 2:

During the 1930s, we were made unsuccessful attempts to improve the quality of penicillin and other antibiotics, learning to receive them in a sufficiently pure form. The first antibiotics were like most modern anti-cancer drugs - it was unclear whether the drug would kill the pathogen before it kills the patient. It was only in 1938, two Oxford University scientist Howard Florey (Howard Florey, 1898-1968) and Ernst Chain (Ernst Chain, 1906-79), succeeded in isolating the pure form of penicillin.

Результаты (английский) 3:

during the 1930s there have been unsuccessful attempts to improve the quality of penicillin and other antibiotics, by learning to receive them in sufficiently pure form. the first antibiotics like most modern anti-cancer drugs, it was unclear whether the cure of the disease kills before it kills the patient. and only in 1938, two scientists at oxford university, howard florey (howard Florey, 1898 - 1968) and эрнсту чейну (ernst chain, 1906 - 79), was able to provide the pure form of penicillin.