Antioxidant and antibacterial activities of methanol extracts of Commiphora gileadensis and Olea europaea linked to their polyphenol composition

العناوين الأخرى

النشاطية المضادة للأكسدة و المضادة للبكتيريا للمستخلصات الميثانولية لنباتات البشام و الزيتون مرتبطة مع المحتوى الفينولي فيها

مقدم أطروحة جامعية

al-Zahrani, Ibrahim

مشرف أطروحة جامعية

al-Tarawinah, Khalid Ahmad

أعضاء اللجنة

Atruz, Umar Muhammad Falih
al-Zaraini, Wail Ali
al-Nuaymat, Sulayman Muhammad

الجامعة

جامعة مؤتة

الكلية

كلية العلوم

القسم الأكاديمي

قسم الأحياء

دولة الجامعة

الأردن

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2015

الملخص الإنجليزي

Antibacterial and antioxidant properties of methanolic extracts derived from aerial parts of two plants (Commiphora gileadensis and Olea europaea) were investigated in this study.

Serial dilution and disc diffusion methods were performed to measure the antibacterial activity of these extracts against different bacterial strains (S.

aureus, E.

coli, K.

pneumoniae, B.

subtilis and M.

luteus).

The total phenolic content was assessed by Folin-Ciocalteu method.

The antioxidant capacity was assessed by both DPPH and FRAP methods.

The amount of the extract required to scavenge 50% of DPPH radical (IC50) was also measured.

Variations were observed among the examined plants in antibacterial and antioxidant activities as well as in their phenol contents.

The results of antibacterial investigation showed that both plants have a good antibacterial activity against all tested bacterial strains except E.coli.

O.

europaea contained higher amount of phenolic compounds (648 mg GA/g plant extract) than C.

gileadensis (356 mg GA/g plant extract).

According to the IC50 values of DPPH assay, the free radical scavenging potential of O.

europaea extract (0.05 mg/mL) was higher than that of C.

gileadensis (0.07mg/mL).

The trend for ferric ions reducing activities of both plant extracts did not vary markedly from their DPPH free radical scavenging activities.

In conclusion, these plants are not only interesting sources for antimicrobial agents but also have a considerable amount of antioxidants.

In addition, these findings revealed that the antioxidant capacity of these plant extracts could be attributed to their total phenolic content.

التخصصات الرئيسية

الأحياء
النبات

الموضوعات

• الأمراض الجرثومية
• العلاج الكيميائي
• المواد المضادة للبكتيريا
• مضادات الأكسدة
• الزيتون

عدد الصفحات

45

قائمة المحتويات

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-656406