Boron is one of special trace element that affect plants, Boron (B) is a non-metal element in Group 13 of the Periodic Table. Properties of B are very close to carbon and silicon. This element has one less valence electron than valence orbitals. Due to small size and high ionization energies, boron results in covalent bonding rather than metallic bonding [1]. B is a rare element in the Earth, representing only 0.001%. It is estimated that worldwide commercial borate deposits are 10 million tonnes [2]. In the Earth, B is not present in the elemental form. It is found in the form of borax, boric acid, colemanite, kernite, ulexite and borates [3]. There are two forms for elemental boron, namely amorphous boron, which is a brown powder, and crystalline boron, which is dark grey in color and a semiconductor at room temperature. In elemental form boron reacts with gaseous HF to form a volatile BF3, however it does not react with gaseous HCl, HBr or HI [4].and boron is essential to human health, Experimental studies show that boron has protective characteristics against prostate cancer [67]. Boric acid in low concentrations partly suppresses the prostate specific antigens (PSAs) proteolytic activity. Therefore, boron compounds can be used for regulating PSAs activities. Furthermore, the suppression of PSA activities caused by boron can help prevent the increase and development of prostate carcinoma [68]. Boric acid concentrations ranging between 60- 100 μM suppress reproduction of cells in prostate cancer’s cell line [69]. In DU-145 prostate cancer cell lines, depending on dosage in 0-1000 μM BA application, so what other uses of boron?

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