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Confused on a medium described in an article

Question asked by Drew Opland-Evers on Nov 6, 2018
Latest reply on Nov 7, 2018 by Steven Cooke


I'm a high-school student in my senior year. For a scientific research project, my group will be attempting to isolate penicillin from bread mold. On a website explaining the process (linked below), it says to create a mixture of chemicals for a medium. What exactly is it making? Is it just some sort of agar or growth medium?


Thanks for your help!


Dissolve the following ingredients, in the order listed, into 500ml of cold tap water: 44.0 grams Lactose Monohydrate, 25.0 grams cornstarch, 3.0 grams sodium nitrate, 0.25 grams magnesium sulfate, 0.50 grams potassium phosphate mono, 2.75 grams glucose monohydrate, 0.044 grams zinc sulfate, 0.044 grams manganese sulfate. Then add enough cold tap water to make one liter. Use hydrochloric acid to adjust the pH to between 5.0 and 5.5.