' 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.
Fruits are generally lower in nitrates though strawberries, bananas, grapes, tomatoes and avocados have useful amounts. Plants take in nitrate through their roots in the soil where the chemical is naturally found. Nitrate is crucial to the growth of plants. The authors explained that when it is converted to a gas called nitric oxide, it has a relaxing effect on blood vessels and may help lower blood pressure.