Contents I. Introduction
Aloe Vera is a cactus-like plant that can be found in dry hot areas around the world and lack of water places. It is a stemless or very short-stemmed plant that belongs to the Lily family [1]. Decades ago, Aloe Vera has been widely used in medicine as it has many antibacterial and antioxidant properties. It consists of 75 different potentially active components like vitamins, sugars, enzymes, lignin, minerals, and amino acids [2]. Aloe Vera unlike any other plant is used externally in treating burns, radiation effects on skin, incisions, and inflammation. In other words, Aloe Vera is essential to get Clammy Skin and speed up wound healing [3]. It was also used to prevent cancer and diabetic activities by extracting and ingesting its juice [4]. Aloe Vera can be used as a mouthwash to treat a sore mouth produced by radiotherapy treatment for cancer. Several medical studies have proven that Aloe Vera is very useful for patients with ulcerative colitis. In addition, Aloe Vera is a very effective treatment for those suffering from stomach colitis [5], and decreases the gastric mucosal lesions caused by 0.6 M HC1 acid [6]. Moreover, Aloe Vera is effective for organ transplant patients as it can help in severe oral mucositis treatment [7]. Aloe Vera tissue has closed bio-impedance electrical circuits in its leaves [8]. Several species of aloe Vera were studied in [9] to figure out some of the different biological properties. Additionally, it can be used to study electrochemical circuits and the responses of the biological closed circuits in different environments [10], [11]. In [10], the electrical signals transmissions over a long distance which were relevant to the biological closed circuits were studied. By using DC charged capacitor method (CSM), they found that Aloe Vera has a strong electrical anisotropy in its leaves. Bio-impedance is defined as the reaction of biological cells to stimuli by an AC signal (voltage or current) [12], [13]. It is a safe technique used to figure out tissue characterization and disease diagnosis, and it changes according to size, health status, shape, type, and chemical composition [13], [14]. Although bio-impedance is applied in several human health and medical applications, it can be used to monitor plants in order to minimize damage and reduce the spread of plant diseases under several environmental conditions. In addition, Bio-impedance is used to study the effects of environmental changes on plants. On the other hand, Bio-impedance portrays the plants' behavior under special conditions such as plant maturity, heating and freezing. Besides, Bio-impedance is used to determine root growth water content [14], [15].
