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.
If you have heartburn not triggered by lemons, try drinking a glass of water with a squeeze of lemon to see if it can help relieve the burning sensation. The small amount of juice in a single wedge, diluted, can provide you with lemon's alkaline benefits while limiting the amount of citric acid you consume.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.