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required drying and burning the seaweed, producing ash that was then washed with water. when this liquid was allowed to evaporate slowly, several useful compounds would precipitate out in sequence. the liquid that remained after the desired precipitates were collect was generally treated with sulfuric acid...
susceptibility and resistance through the use of simple techniques for disk agar diffusion tests, and a guide to do a more thorough study to test therapeutic levels using microbial inhibitory concentration. book laboratory manual of standardized methods for the analysis of pesticide and antibiotic residue...