{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T21:58:16Z","timestamp":1788299896002,"version":"build-2803163510"},"reference-count":27,"publisher":"FapUNIFESP (SciELO)","license":[{"start":{"date-parts":[[2022,1,1]],"date-time":"2022-01-01T00:00:00Z","timestamp":1640995200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2022,1,1]],"date-time":"2022-01-01T00:00:00Z","timestamp":1640995200000},"content-version":"am","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"},{"start":{"date-parts":[[2022,1,1]],"date-time":"2022-01-01T00:00:00Z","timestamp":1640995200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Braz. J. Biol."],"abstract":"<jats:p>Abstract This study explores the antioxidant activity, phytochemical screening, total phenolic and flavonoids contents in the extracts of four locally available weeds plants namely Convolvulus arvensis, Chenopodium murale, Avena fatua and Phalaris minor with different solvents. The antioxidant activities of these extracts were determined via various in-vitro methods such as total antioxidant activity (TAA), reducing power (RP), DPPH (2,2-Diphenyl-1-Picrylhydrazyl) free radical scavenging and hydrogen peroxide scavenging assays. Phytochemical screening was performed both qualitatively as well as quantitatively. Total phenolic content (TPC) and total flavonoid content (TFC) were determined through Folin- Ciocalteu reagent and aluminium chloride methods respectively. Methanol-chloroform solvent showed the presence of a high amount of TPC in milligram of gallic acid equivalent per gram of dry weight (mg of GAE\/g of DW) in the extracts of all weeds. Their descending sequence was Avena fatua (74.09) \u02c3 Phalaris minor (65.66) \u02c3 Chenopodium murale (64.04) \u02c3 Convolvulus arvensis (61.905), while, chloroform solvent found to be best solvent for the extraction of TFC. Methanol-chloroform solvent was also found to be best solvent for TAA (Total antioxidant activity assay) which showed values in milligram of ascorbic acid equivalent per gram of dry weight (mg of AAE \/g of DW), for DPPH scavenging activity, reducing power (antioxidant activity) and hydrogen peroxide scavenging activity. Phytochemical screening indicated the presence of polyphenols, flavonoids, tannins, saponins, alkaloids and glycosides in these weeds.<\/jats:p>","DOI":"10.1590\/1519-6984.256486","type":"journal-article","created":{"date-parts":[[2022,3,16]],"date-time":"2022-03-16T13:39:32Z","timestamp":1647437972000},"source":"Crossref","is-referenced-by-count":9,"title":["Phytochemical screening and evaluation of antioxidant, total phenolic and flavonoid contents in various weed plants associated with wheat crops"],"prefix":"10.1590","volume":"82","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9693-7572","authenticated-orcid":false,"given":"M.","family":"Salim","sequence":"first","affiliation":[{"name":"Gomal University, Pakistan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2958-5850","authenticated-orcid":false,"given":"A.","family":"Saeed","sequence":"additional","affiliation":[{"name":"Gomal University, Pakistan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4759-0699","authenticated-orcid":false,"given":"M.","family":"Iqbal","sequence":"additional","affiliation":[{"name":"Gomal University, Pakistan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4920-1770","authenticated-orcid":false,"given":"B. A.","family":"Khan","sequence":"additional","affiliation":[{"name":"Gomal University, Pakistan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"N.","family":"Khan","sequence":"additional","affiliation":[{"name":"Gomal University, Pakistan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"I.","family":"Rabbani","sequence":"additional","affiliation":[{"name":"Kohat University of Science & Technology, Pakistan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"F.","family":"Alsenani","sequence":"additional","affiliation":[{"name":"Umm Al Qura University, Saudi Arabia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9321-0087","authenticated-orcid":false,"given":"A.","family":"Rasul","sequence":"additional","affiliation":[{"name":"Government College University, 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