The pathogenesis of ectopic gastric mucosa is a matter of debate between a congenital-embryological-and an acquired origin-consecutive to a gastroesophageal reflux (GER) like Barrett's esophagus -, the most commonly accepted theory being that these areas are embryological remnants.
Standard size latex filled helium balloons stay afloat for approx 8 - 12 hours, metallic helium filled balloons float for 2-5 days. I have found that a 36 latex helium filled balloon can stay afloat for a number of days due to the thickness of the balloon and the massive quantity of helium.
EnergizerÂ® Ultimate Lithiumâ¢ AA and AAA last up to 20 years in storage, while our 9V lasts up to 10 years in storage. Energizer RechargeÂ® AA, AAA, C, D, and 9V last charged up to 12 months in storage, with a battery life of up to 5 years under normal conditions for AA and AAA batteries.