Su ürünleri işleme teknolojisinde katkı maddesi olarak kullanılabilecek bazı bitki ekstraktlarının antioksidan, antimikrobiyal ve fenolik madde içeriklerinin belirlenmesi


Thesis Type: Postgraduate

Institution Of The Thesis: Recep Tayyip Erdogan University, Fen Bilimleri Enstitüsü, Su Ürünleri (Yl), Turkey

Approval Date: 2020

Thesis Language: Turkish

Student: BÜŞRA KARA

Supervisor: Emre Çağlak

Abstract:

The fact that medicinal and aromatic plants have strong antioxidant and antimicrobial effects increases the importance of their use in the pharmaceutical and food industries. There are many researches on the use of natural antioxidant and antimicrobial sources of plants and fruits. As a result of studies, it is known that antioxidant and antimicrobial capacities of some plants and fruits are higher than synthetic substances. In this study, antioxidant-antimicrobial activities and phenolic content of extracts obtained from different parts of various plants (olive leaf, tipton weed, tea seed) and fruits (pomegranate, mandarin, orange kiwi peel) in different methods and concentrations were investigated. DPPH (2.2.-diphenyl-1-picrihydrazyl) radical scavenging capacity was used to determine antioxidant activity, disc diffusion method was used to determine antimicrobial activity and folin-ciocalteu reagent method was used to determine the phenolic content. When the antioxidant activities of the materials used in the study were examined, it was determined that the highest pomegranate peel and the lowest were the tangerine peel, and when the phenolic content was examined, the highest activity was in the olive leaf and the lowest was in the orange peel extract. When looking at the antimicrobial activities, it was determined that the maximum zone diameter was against pomegranate bark extract against Escherichia coli, Salmonella enterica, Listeria monocytogenes and Staphylococcus aureus bacteria. It was observed that the extracts obtained from tangerine peels did not show any effect against bacteria. As a result of the study, it is aimed to provide basic data for the use of materials for medical purposes, since the plants and fruits used constitute an important potential resource in our country..