Submarine defense: Russian subs posing Pacific threat to US Navy. Military & Defense. March 18, 2016, 13:28 UTC+3. Ahead of Submariner Day marked on March 19 in Russia, TASS reviews Russian submarines that cause the US Navyâs greatest concern in the Pacific region.
What iceberg lettuce lacks in flavor it makes up for in crispness, versatility and storage length -- washed and stored correctly, a head of iceberg lettuce can last up to seven days in the refrigerator.
0Â°C (32Â°F) is required to optimize the postharvest life of romaine lettuce. A shelf-life of around 21 days is expected at this temperature. At 5Â°C (41Â°F) a shelf-life of about 14 days can be expected as long as no ethylene is in the environment.