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the mission of world journal of pharmaceutical sciences (an international peer-reviewed monthly journal) is to provide its readers with up-to-date information relevant to pharmaceutical sciences. the journal policy is to publish work deemed by peer reviewers to be a coherent and sound addition to scientific knowledge and to put less emphasis on interest levels, provided that the research constitutes a. original article: free radical scavenging activities of crude methanolic extract of psidium guaja*a leaves and its different. psidium guaja*a leaves and its fruits are widely used as a source of food and for ethnomedicinal purposes in boshundhara baridhara of ba*gladesh, but not many studies have been conducted on the locally grown species of the plant in the area. this study investigated the phytochemical, and antioxidant activities of crude methanolic extract of locally grown psidium guaja*a leaves and its different fractions. a qualitative phytochemical an*lysis was carried out on the crude extract using standard scientific procedures. furthermore, antioxidant activities of both the crude methanolic extract and the various fractions were as*essed using dpph (1, 1-diphenyl-2-picrylhydrazyl radical) test, with ascorbic acid as standard. the results showed the presence of saponins, alkaloids, flavonoid, and carbohydrate, and tannin was absent. the dpph results showed that methanolic crude extract had the highest free radical scavenging activity with an ic50 guaja*a leave could be good sources of antioxidants of natural origin. keywords : psidium guaja*a, dpph, methanol, antioxidant, phytochemical title : free radical scavenging activities of crude methanolic extract of psidium guaja*a leaves and its different fractions. original article: bioremediation and detoxification of a textile azo dye-metanil orange by bacterial strain pia-5. environmental pollution has been recognized as one of the major problems of the modern world. the increasing demand for water and the