الفهرس 
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Abstract
The current study was designed as comparative study to evaluate the phytochemical contents, HPLC analysis, GC-MS analysis, determination of amino acids using Amino Acid Analyzer, antimicrobial activity, antioxidant activity, cytotoxic activities, of Arthrocnemum macrostachyum (Moric) K. Koch, Suaeda pruinosa Lange and Kochia indica (Bassia indica) (Wight) A. J. Scott belong to family Chenopodiaceae (Amaranthaceae) family.
This study revealed that, in the case of A. macrostachyum the soil texture was clay loam, in the case of S. pruinosa the texture of the soil was sandy clay loam, while in K. indica the texture of the soil was loamy sand. S. pruinosa results showed the highest contents of total phenolics, flavonoids, lipids and carbohydrates in comparison with the remaining two plants, while A. macrostachyum showed the highest total alkaloids and tannins content. HPLC analyses of phenolics and flavonoids compounds resulted in, A. macrostachyum containing resorcinol, kaempferol and quercetin, S. pruinosa contain ferulic acid, quercetin, kaempferol and resorcinol while, K. indica contain quercetin, kaempferol, resorcinol and phenantherine. HPLC analysis of vitamins showed two vitamins, vitamin A and tocopherol for the studied plants (A. macrostachyum, S. pruinosa and K. indica) with different ranges of concentrations. Diethyl ether extract of S. pruinosa showed the highest antioxidant activity with Scav % (95.25 %) followed by chloroform extract of A. macrostachyum (90.07 %). The plants’ extracts give moderate activity against Candida albicans, but in the case of Bacillus subtilis, S. pruinosa showed the highest activity. Also, K. indica results showed certain activity against Escherichia coli and Proteus Vulgaris