Tunis University

About: Tunis University is a education organization based out in Tunis, Tunisia. It is known for research contribution in the topics: Population & Thin film. The organization has 11745 authors who have published 15400 publications receiving 154900 citations. The organization is also known as: University of Tunis & UT.

Chemical composition and antibacterial activities of seven Eucalyptus species essential oils leaves

Abstract: Background: In this paper, we have studied the essential oils chemical composition of the leaves of seven Eucalyptus species developed in Tunisia. Eucalyptus leaves were picked from trees growing in different arboretums in Tunisia. Choucha and Mrifeg arboretums located in Sedjnene, region of Bizerte (Choucha: E. maideni, E. astrengens et E. cinerea; Mrifeg : E. leucoxylon), Korbous arboretums located in the region of Nabeul, North East Tunisia with sub-humid bioclimate, (E. lehmani), Souiniet-Ain Drahem arboretum located in region of Jendouba (E. sideroxylon, E. bicostata). Essential oils were individually tested against a large panel of microorganisms including Staphylococcus aureus (ATCC 6539), Escherichia coli (ATCC 25922), Enterococcus faecalis (ATCC29212), Listeria ivanovii (RBL 30), Bacillus cereus (ATCC11778). Results: The yield of essential oils ranged from 1.2% to 3% (w/w) for the different Eucalyptus species. All essential oils contain α-pinene, 1,8-cineol and pinocarveol-trans for all Eucalyptus species studied. The 1,8-cineol was the major compound in all species (49.07 to 83.59%). Diameter of inhibition zone of essential oils of Eucalyptus species varied from 10 to 29 mm. The largest zone of inhibition was obtained for Bacillus cereus (E. astrengens) and the lowest for Staphylococcus aureus (E. cinerea). The essential oils from E. maideni, E. astrengens, E. cinerea (arboretum of Bizerte), E. bicostata (arboretum of Aindraham) showed the highest antibacterial activity against Listeria ivanovii and Bacillus cereus. Conclusion: The major constituents of Eucalyptus leaves essential oils are 1,8-cineol (49.07 to 83.59%) and α-pinene (1.27 to 26.35%). The essential oils from E. maideni, E. astrengens, E. cinerea, E. bicostata showed the highest antibacterial activity against Listeria ivanovii and Bacillus cereus, they may have potential applications in food and pharmaceutical products.

Women's mental health: acute impact of COVID-19 pandemic on domestic violence.

Abstract: The coronavirus disease 2019 (COVID-19) pandemic created a situation of general distress. Although the focus has been initially more on the physical health during the pandemic, mental health concerns linked to the lockdown have quickly risen. This study aims to assess the effect of the COVID-19-related lockdown on Tunisian women's mental health and gender-based violence. An online survey was conducted, using the Depression Anxiety and Stress Scales (DASS-21) and the Facebook Bergen Addiction Scale (FBAS). We chose a female-exclusive social group on Facebook and used the snowball sampling method. A total of 751 participants originating from all the Tunisian regions completed the questionnaire. More than half of the participants (57.3%) reported extremely severe distress symptoms, as per the DASS-21. Those who had a history of mental illness and who were allegedly abused during lockdown were found to have more severe symptoms of depression, anxiety, and stress. Around 40% of women reported problematic social media use. Violence against women also reportedly increased significantly during the lockdown (from 4.4 to 14.8%; p < 0.001). Psychological abuse was the most frequent type of violence (96%). Women who had experienced abuse before the lockdown were at an increased risk of violence during lockdown (p < 0.001; OR = 19.34 [8.71-43.00]). To our knowledge, this is the first study that evaluates the acute impact of COVID-19 on mental health and violence against women in Tunisia, Africa, and the Arab world. It may be a sound basis for developing a more effective psychological intervention aimed at women in these regions.