Agar’s low viscosity also makes it easy to pour into Petri dishes, and its transparency permits observation of microbes growing on its surface.7 Also aiding in this is its low syneresis (extrusion of water from the gel), guaranteeing less surface “sweating”: Once a plate is inoculated, bacterial colonies stay in place and do not mix.
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Founded by brothers Ralph and Albert Slazenger in 1881, the brand became a go-to for golf and tennis equipment and was appointed the official ball supplier for Wimbledon in 1902.
但更多消费者期待的是新奇水果兼具好品质与适中价格。这种期待有可能成真吗？
Фото: Bob Strong / Reuters