الفهرس 
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Abstract
Due to the medicinal importance of most plants that contain vitamins and other valuable compounds used to treat many diseases, many studies covered the effect of both types of ionizing and non-ionizing radiation on animals but little studies covered the effect on the internal composition and internal contents of plants. Due to the presence of multiple sources of industrial radiation which penetrate into public life and the presence of medicinal plant seeds near them, the research is interested in studying the effect of ultraviolet radiation, issued by an artificial source, on the internal structure as arrangement, antioxidants and free radical of Ammi majus and Foeniculum vulgare plants. In this research : Pure seeds of Ammi majus and Foeniculum vulgare were obtained from Egyptian Ministry of Agriculture. One fluorescent lamp (Type C, range from 200-280 nm) with 15 W was used as a UV source. Internal structure of plants was studied by X-ray diffractometer (PANalytical X`Pert PRO XRD). Molecular structure of plants was studied by Fourier spectroscopy to convert the infrared (Nicolet iS10). Extracts of these plants were made using different chemical compounds (ethanol, methanol, acetone and ethyle actate) in order to study the changes in the internal content (vitamins, enzymes activity and antioxidants) using the red-ray spectroscopy and mathematical equations to calculate them. The results showed : 1. A change in the growth of the used plants (shape, color, height and weight) after exposure to ultraviolet rays for different periods of time (1, 2, 3 and 4 hours) and at different distances (5 and 20 cm). 2. The occurrence of a change in the structural composition (partial and amorphous) of both plants after exposure to ultraviolet rays. 3. The contents of vitamins, enzyme activity and antioxidants increased with increasing exposure time to ultraviolet rays for different periods of time (1, 2 and 3 hours), and then decreased at 4 hours of exposure. 4. Decreased contents of vitamins, enzyme activity and antioxidant activity, with an increase in the distance from 5 to 20 cm from the source of ultraviolet rays. So the recommendation was : 1. Attention must be paid to study the effect of non-ionizing rays, which have become circulating in our sphere like water and air, and have become an imminent threat to human life. Caution must also be exercised when handling or coming near to it. 2. Conducting more in-depth research studies on the effect of radiation on more plants, then offering solutions to treat side effects.