Document Details

Document Type : Thesis 
Document Title :
”ANTIMICROBIAL AND BIOFILM INHIBITING ACTIVITIES OF MACROALGAE“
"النشطة المضادة للميكروبات وتثبيط الغشية الحيوية من الطحالب الكبيرة"
 
Subject : Faculty of Marine Sciences 
Document Language : Arabic 
Abstract : Marine macroalgae generally keep their surface free from fouling organisms mainly because of the antifouling defense. It has been proposed that the antifouling activity is mainly attained due the production of secondary metabolites. Macroalgal secondary metabolites that repel fouling organisms or herbivores may differ between spatial scales and has broad ecological roles. In the present study, antifouling (antibiofilm) performance of two macroalgal species, Halimeda sp. and Dictyota sp. collected from the Red Sea coastal waters were assessed through various laboratory assays. The macroalgal species crude extracts were prepared using methanol and hexane as solvents. A biofilm-forming bacterial strain isolated from the hard substrata submerged in the Red Sea coastal waters was used as target organism to test the antifouling defense. The extracts of the macroalgae inhibited the growth of biofilm-forming bacterial strain in a bacterial growth inhibition assay conducted using spectrophotometer and culture plate methods. The extracts also inhibited the attachment of bacterial strain on glass surface. In addition, the macroalgal extracts changed the hydrophobicity and extracellular polymeric substances production in the bacterial strain. In general, results showed that both macroalgal species showed strong defense against bacterial colonization on surfaces. The results also indicated for the applications of macroalgae extracts as a source for antibiofilm and antibacterial applications. 
Supervisor : Dr. Satheesh Sathianeson 
Thesis Type : Master Thesis 
Publishing Year : 1439 AH
2017 AD 
Added Date : Thursday, December 28, 2017 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
آلاء عارف قاضيQazi, Alaa ArefResearcherMaster 

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 42978.pdf pdf 

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