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Felhi, Samir,Baccouch, Noura,Salah, Hichem Ben,Smaoui, Slim,Allouche, Noureddine,Gharsallah, Neji,Kadri, Adel 한국식품과학회 2016 Food Science and Biotechnology Vol.25 No.6
The present study revealed that the nutritive value of grape seeds (Vitis vinifera L.) was $383.55{\pm}0.13Kcal/100g$, with magnesium as the most abundant mineral element ($70.44{\pm}0.88 mg/L$). The maximum phenolic ($392.58{\pm}1.70mg\;of\;GAE/g$), flavonoid ($256.16{\pm}1.60mg\;of\;QE/g$), and tannin ($30.95{\pm}0.17mg\;of\;CE/g$) contents were also found in the ethanol, dichloromethane, and hexane extracts, respectively. The major phytochemical compounds in the ethyl acetate extract were identified via gas chromatography-mass spectrometry (GC-MS) analysis. The ethanol extract has the highest antioxidant activity ($IC_{50}=140{\pm}1.20{\mu}g/mL$ for DPPH, $145.28{\pm}0.45mg$ ${\alpha}-tocopherol/g$ for total antioxidant capacity, and $EC_{50}=80{\pm}1.41{\mu}g/mL$ for ferric-reducing power assays). For ${\beta}-carotene$ test, the highest antioxidant activity was obtained in the hexane extract. A satisfactory antimicrobial activity was found against a panel of microorganisms with the ethyl acetate extract as the best antimicrobial agent. Additionally, it was found that the bactericidal concentration required for the grape seed extract to kill Listeria monocytogenes should be less than 12.50 mg/mL (minimum inhibitory concentration=4).
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Samir Felhi,Noura Baccouch,Hichem Ben Salah,Slim Smaoui,Noureddine Allouche,Néji Gharsallah,Adel Kadri 한국식품과학회 2016 Food Science and Biotechnology Vol.25 No.6
The present study revealed that the nutritive value of grape seeds (Vitis vinifera L.) was 383.55±0.13 Kcal/100 g, with magnesium as the most abundant mineral element (70.44±0.88 mg/L). The maximum phenolic (392.58±1.70mg of GAE/g), flavonoid (256.16±1.60 mg of QE/g), and tannin (30.95±0.17mg of CE/g) contents were also found in the ethanol, dichloromethane, and hexane extracts, respectively. The major phytochemical compounds in the ethyl acetate extract were identified via gas chromatography–mass spectrometry (GC–MS) analysis. The ethanol extract has the highest antioxidant activity (IC50=140±1.20 μg/mL for DPPH, 145.28±0.45mg α-tocopherol/g for total antioxidant capacity, and EC50=80±1.41 μg/mL for ferric-reducing power assays). For β-carotene test, the highest antioxidant activity was obtained in the hexane extract. A satisfactory antimicrobial activity was found against a panel of microorganisms with the ethyl acetate extract as the best antimicrobial agent. Additionally, it was found that the bactericidal concentration required for the grape seed extract to kill Listeria monocytogenes should be less than 12.50 mg/mL (minimum inhibitory concentration=4).
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Modal identification and model updating of a reinforced concrete bridge
El-Borgi, S.,Choura, S.,Ventura, C.,Baccouch, M.,Cherif, F. Techno-Press 2005 Smart Structures and Systems, An International Jou Vol.1 No.1
This paper summarizes the application of a rational methodology for the structural assessment of older reinforced concrete Tunisian bridges. This methodology is based on ambient vibration measurement of the bridge, identification of the structure's modal signature and finite element model updating. The selected case study is the Boujnah bridge of the Tunis-Msaken Highway. This bridge is made of a continuous four-span simply supported reinforced concrete slab without girders resting on elastomeric bearings at each support. Ambient vibration tests were conducted on the bridge using a data acquisition system with nine force-balance accelerometers placed at selected locations of the bridge. The Enhanced Frequency Domain Decomposition technique was applied to extract the dynamic characteristics of the bridge. The finite element model was updated in order to obtain a reasonable correlation between experimental and numerical modal properties. For the model updating part of the study, the parameters selected for the updating process include the concrete modulus of elasticity, the elastic bearing stiffness and the foundation spring stiffnesses. The primary objective of the paper is to demonstrate the use of the Enhanced Frequency Domain Decomposition technique combined with model updating to provide data that could be used to assess the structural condition of the selected bridge. The application of the proposed methodology led to a relatively faithful linear elastic model of the bridge in its present condition.
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Clinical characteristics and outcomes of critically ill COVID-19 patients in Sfax, Tunisia
Mabrouk Bahloul,Sana Kharrat,Kamilia Chtara,Malek Hafdhi,Olfa Turki,Najeh Baccouche,Rania Ammar,Nozha Kallel,Majdi Hsairi,Olfa Chakroun-Walha,Chokri Ben Hamida,Hedi Chelly,Khaiereddine Ben Mahfoudh,Ab 대한중환자의학회 2022 Acute and Critical Care Vol.37 No.1
Background: Africa, like the rest of the world, has been impacted by the coronavirus disease 2019 (COVID-19) pandemic. However, only a few studies covering this subject in Africa have been published. Methods: We conducted a retrospective study of critically ill adult COVID-19 patients—all of whom had a confirmed severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection—admitted to the intensive care unit (ICU) of Habib Bourguiba University Hospital (Sfax, Tunisia). Results: A total of 96 patients were admitted into our ICU for respiratory distress due to COVID-19 infection. Mean age was 62.4±12.8 years and median age was 64 years. Mean PaO2/FiO2 ratio was 105±60 and ≤300 in all cases but one. Oxygen support was required for all patients (100%) and invasive mechanical ventilation for 38 (40%). Prone positioning was applied in 37 patients (38.5%). Within the study period, 47 of the 96 patients died (49%). Multivariate analysis showed that the factors associated with poor outcome were the development of acute renal failure (odds ratio [OR], 6.7), the use of mechanical ventilation (OR, 5.8), and serum cholinesterase (SChE) activity lower than 5,000 UI/L (OR, 5.9). Conclusions: In this retrospective cohort study of critically ill patients admitted to the ICU in Sfax, Tunisia, for acute respiratory failure following COVID-19 infection, the mortality rate was high. The development of acute renal failure, the use of mechanical ventilation, and SChE activity lower than 5000 UI/L were associated with a poor outcome.
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