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.
第七十三条 货物由承运人接收或者装船后，应托运人的要求，承运人应当签发提单。提单可以由承运人授权的人签发；由载货船舶的船长签发的，视为代表承运人签发。
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Valdo Calocane, 34, fatally stabbed Grace O’Malley-Kumar and Barnaby Webber, both 19, and Ian Coates, 65, during a stabbing spree in the city on 13 June 2023.