' 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.
â¢ Nitrates occur naturally in the soil. â¢ Nitrates are used to preserve cured meats. â¢ Nitrates convert to nitrites in the body. High levels of nitrates have been linked with increased risks of Alzheimer's, diabetes, and Parkinson's, along with gastric, esophageal, and colon cancers. To unlock this lesson you must be a Study.com Member.