Fifty grams from each sample was put in plastic can as its natural form without any process, a piece of CR-39 manufactured by TASTRACK. These household foods are (coffee, tea, powder milk, rice, flour, cornstarch, and powder coconut, salt) were analyzed by closed-can technique (CR-39). Through current work, 24 samples from different types of household foods were collected from Egyptian markets which these foods are considered the daily diet of Egypt residents. The breathing of radon radioactive progenies with ambient air can caused kidney infections, lung cancer, and skin. Air which human breath it, is the primary source of radioactive dose that enter the human body, and as well as the main source of radon that found in the earth’s atmosphere generated by the automatic decomposition of uranium. Also drinking water and fluids can contain low dose. Plants contain radioactive isotopes initiating from the soil, that absorbed it with other natural substances. When the human are eating plants, meat of animals or drinking any fluids (tea, coffee, water, and juice), he can be contaminated with different radioactive isotopes (Ra-226, Rn-222, U-238, etc). Radiation contamination which are existing in water and soil can be transported by the food chain to humans and animals. When human respire or inhale radon and its progenies along with the normal air, most of the radon is exhaled, its progenies become record to the internal walls and membranes of our respiratory system and continue producing steady damage because of their alpha activity. These daughters’ yields are hard and have a trend to relate themselves to aerosols in around air. Radon progenies are Po-218 and Po-214 emit alpha particles. Its half-life of 3.82 days with alpha energy 5.49 Mev. Radon-222 is a progeny product of radium-226 which is called alpha gas emitter. However, the chemical manner of radium is as like as calcium, therefore radium absorbed to blood from lungs or gastrointestinal tract (GI-tract) or follows the manner of calcium and is mainly deposited in bone. Radium-226 in the environment is broadly spreading, and usually presented in several concentrations in soils, water, foods, sediments and rocks. The measurements of radon and radium concentrations in foods are main for the health safety. Uranium daughters (Ra-226 and Rn-222) are mainly have a major health risk. If this will happen then a person will be susceptible to skin cancer. Health effects from external exposure are limited to skin contact and uranium object would have to stay in direct skin contact for more than 250 h. Uranium has been repeatedly claimed to be the cause of cancer, leukemia and other health effects. Once ingested uranium is highly toxic and attacks the inner organs such as kidneys, lungs and heart. Uranium ore is relatively harmless, as long as it remains outside of the body. Uranium and its compounds are carcinogenic and highly toxic, which causes acute kidney failure and death in high concentrations as well as brain, liver and heart diseases. Naturally, Uranium exists as three isotopes 234U, 235U and 238U with a relative abundance of 0.0055, 0.720 and 99.29%, respectively. It is a relatively reactive element which combines with non–metals such as oxygen, sulfur, chlorine, fluorine, phosphorus, and bromine. Uranium occurs naturally in low concentrations (a few parts per million) in soil, rock, surface water, and groundwater. After study it is found that the average values of annual effective dose in mSv/y are within the recommended limit of ICRP values except its values for cornstarch and sugar are relatively high, and there are a wide range of variations in the values of transfer factor for Rn-222, and Ra-226 for all types. Analysis the concentrations of Radon-222 and Radium-226 for different types of household foods samples are very substantial for realizing the comparative contributions of specific substances to the whole radon content set within the human body. Salt analysis is very important due to its high consumption by the population and for its medicinal use. Many food items contain natural sources of salt. This chapter show the natural of radioactivity as alpha particle which produce from decaying of radium to radon so in this chapter describe the radon in some types of household food (coffee, tea, powder milk, rice, flour, cornstarch, and powder coconut) and different types of salt by using Solid State Nuclear Track Detectors (SSNTD), were analyzed by closed-can technique (CR-39).
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