The boiling temperature of nitrogen is â195.8 Â°C (â320.4 Â°F), about 13 Â°C (â23 Â°F) below that of oxygen, which is therefore left behind. Nitrogen can also be produced on a large scale by burning carbon or hydrocarbons in air and separating the resulting carbon dioxide and water from the residual nitrogen.
Acidic foods like citrus fruits can stimulate acid production and increase heartburn. Avoid oranges, grapefruit, lemons and their juice. Like citrus fruits, tomatoes and products made from tomatoes (tomato sauce and paste, tomato juice) can stimulate the stomach to produce more acid.
Heartburn can happen to anyone, and although it can be uncomfortable, mild and infrequent cases are often not a problem. Lemons, with their sharp, sour taste may trigger heartburn, because they can increase stomach acid content.emons are naturally sour, due to their citric acid content, with roughly 1.44 grams per ounce in lemon juice. Along with other citrus fruits, they are listed as potential causes of heartburn by MedlinePlus.