Test Effectiveness of Various Commercial Cleaners
Do disinfectant cleaners really work as advertised? Find out by testing five disinfectant samples against two common nonpathogenic bacterial strains. Students place disinfectant disks on a bacterial culture; if it is effective against the bacteria, a clear zone will appear around the disc. It comes with tube cultures of Bacillus subtilis and Escherichia coli, materials for six setups, teacher’s guide, and student copymaster. Note: Coupon included for perishable materials. Redeem by mail, fax, phone, or e-mail
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