It is difficult to know exactly when the shift from gelatine to agar occurred. As often happens for scientific breakthroughs, agar was likely adopted incrementally alongside the use of other growth media. In 1913, for example, the first diagnosis of Serratia marcescens as a human pathogen was made by growing it on agar as well as on potatoes.
We meet Collins at London's Science Museum. She's softly spoken, warm and very down to earth - but you quickly get a sense of her focus and determination. She clearly has inner steel.
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Раскрыты подробности похищения ребенка в Смоленске09:27
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