{"id":5209,"date":"2026-02-20T08:42:46","date_gmt":"2026-02-20T08:42:46","guid":{"rendered":"https:\/\/cognitionconferences.com\/agriculture\/?post_type=speaker&#038;p=5209"},"modified":"2026-02-20T08:42:46","modified_gmt":"2026-02-20T08:42:46","slug":"waleed-al-marzooqi","status":"publish","type":"speaker","link":"https:\/\/cognitionconferences.com\/agriculture\/speaker\/waleed-al-marzooqi\/","title":{"rendered":"Waleed Al-Marzooqi"},"content":{"rendered":"<p><strong>Abstract<\/p>\n<p><\/strong><em>communis <\/em>L.) leaves against selected Gram-positive and Gram-negative bacterial strains. The essential oil was obtained using microwave-assisted hydrodistillation, and its chemical composition was analyzed through gas chromatography\u2013mass spectrometry (GC\u2013MS). The analysis revealed a high content of oxygenated monoterpenes, including cineole (26.59%), linalool (14.68%), and \u03b1-pinene (13.68%). Antibacterial activity was tested using the agar well diffusion method against four bacterial strains: <em>Escherichia coli <\/em>and <em>Klebsiella pneumoniae <\/em>(Gram-negative) and <em>Bacillus subtilis <\/em>and <em>Micrococcus luteus <\/em>(Gram-positive). Prior to testing, bacterial suspensions were standardized to an optical density (OD\u2086\u2080\u2080) of 0.06, except for <em>Micrococcus luteus<\/em>, which was adjusted to 0.13. In each assay, 20 \u00b5L of essential oil was applied per well. The essential oil demonstrated the highest antibacterial effect against <em>Bacillus subtilis <\/em>with a mean inhibition zone of 3.06 cm. <em>Escherichia coli <\/em>showed a strong response (2.84 cm), while <em>Klebsiella pneumoniae <\/em>displayed moderate inhibition (1.75 cm). No visible inhibition was observed for <em>Micrococcus luteus<\/em>. These findings suggest that <em>Myrtus communis <\/em>essential oil possesses potential antibacterial properties, particularly against certain Gram- positive and Gram-negative bacteria. This highlights its potential as a natural antimicrobial agent for use in veterinary medicine, food preservation, and animal health management<strong><br \/>\n<\/strong><\/p>\n","protected":false},"featured_media":5084,"template":"","meta":{"_acf_changed":false},"schedule":[5],"speaker-category":[6],"class_list":["post-5209","speaker","type-speaker","status-publish","has-post-thumbnail","hentry","schedule-day-1","speaker-category-speakers"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Waleed Al-Marzooqi | Sultan Qaboos University | Oman<\/title>\n<meta name=\"description\" content=\"Dr. Waleed Al-Marzooqi is an Associate Professor in the Department of Animal &amp; Veterinary Sciences at Sultan Qaboos University, Sultanate of Oman.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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