' An Act to preserve daylight and provide standard time for the United States ' was enacted on March 19, 1918. [See law] It both established standard time zones and set summer DST to begin on March 31, 1918. Daylight Saving Time was observed for seven months in 1918 and 1919.
Nitrate-rich foods include lettuce, parsley and spinach. âLeafy vegetables contain chemical nitrate that improves heart health,â the Mail Online reports. In a recent study, researchers looked at the effects of a nitrate-rich diet on rats.
A final cause for concern is that some baby foods contain naturally occurring nitrate. A recent study found that a number of baby foods, including bananas, carrots, garden vegetables, spinach, green beans, and beets, contain high concentrations of nitrate (Dusdieker, et al 1994).n numerous studies, exposure to high nitrate drinking water has been linked to a variety of effects ranging from hypertrophy (enlargement) of the thyroid, to 15 different types of cancer to two kinds of birth defects and even to hypertension.