Spectrophotometric determination of hydrogen-ion concentrations and of the apparent dissociation constants of indicators. IV. I-naphthol-2-sodium sulphonate indophenol

✍ Scribed by Walter C. Holmes; Edward F. Snyder

• Publisher: Elsevier Science
• Year: 1925
• Tongue: English
• Weight: 72 KB
• Volume: 200
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(25)90172-x

✦ Synopsis

511

plication of organisms, reaching 20,000,000 on the inside leaves. These are non-pathogenic, putrefying organisms. Washing head lettuce before storing in the icebox causes much more decay than storage without washing.

The bacterial count on unwashed heads stored for seven days was ~o,ooo,ooo, while on washed heads it was 2,ooo,ooo,ooo bacteria per gram. Lettuce would keep longer and better if placed in the icebox as soon as b'ought. being thoroughly washed just before using.