Olfa DRIDI

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• Type de publi. : Article dans une revue
• Date de publi. : 01/02/2021
• Auteurs : Leila ManaiBéchir Dridi RezguiDamien BarakelPhilippe TorchioOlivier PalaisOlfa MessaoudiArwa AzharyFeriel BouhjarBrahim Bessais
• Organismes : Tunis El Manar University [University of Tunis El Manar] [Tunisia] = Université de Tunis El Manar [Tunisie] = جامعة تونس المنار (ar) Tunis El Manar University [University of Tunis El Manar] [Tunisia] = Université de Tunis El Manar [Tunisie] = جامعة تونس المنار (ar) Institut des Matériaux, de Microélectronique et des Nanosciences de Provence Institut des Matériaux, de Microélectronique et des Nanosciences de Provence Institut des Matériaux, de Microélectronique et des Nanosciences de Provence University of Ha’il University of Ha’il Shaqra University, Saudi Arabia Tunis El Manar University [University of Tunis El Manar] [Tunisia] = Université de Tunis El Manar [Tunisie] = جامعة تونس المنار (ar)
• Publié dans Phase Transitions le 02/11/2020

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Résumé : Metal nanoparticles attract the worldwide interest due to their interesting optical and electrical properties, which allow their implementation as promising light scatters in solar cell devices. These nanoparticles exhibit localized surface plasmon resonance (LSPR) characteristics, which are strongly dependent on both intrinsic and extrinsic factors. Tuning the LSPR characteristics yields to interesting properties in terms of enhancement, localization and guiding of the electromagnetic field on sub-wavelength scales. For that purpose, we investigate in this work the effect of dielectric spacer layer (tin oxide) with different thickness on light reflection due to random self-assembled Ag-NPs. A correlation between morphological properties, optical reflectance and electrical characteristics is established by combining scanning electron microscopy, UV-Vis-NIR spectroscopy and current–voltage analyses. Our results show that a dielectric layer with an appropriate thickness and refractive index is useful for reducing the amount of reflected light and consequently the shifted photocurrent response for all wavelengths.

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Fichiers liés : Manai 2021 The influence of a dielectric spacer layer.pdf

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• Type de publi. : Article dans une revue
• Date de publi. : 04/03/2016
• Auteurs : Nizar Ben HalimSana HsounaKhaled LasramInsaf RejebAsma WalhaFaten TalmoudiHabib MessaiAhlem Sabrine Ben BrickHouyem OuraginiWafa CherifMajdi NagaraFaten Ben RhoumaIbtissem ChoucheneFarah OuechtatiYosra BouyacoubMariem Ben RekayaOlfa MessaoudSlim Ben AmmarLeila El MatriNeji TebibMarie F. Ben DridiMourad MokniAhlem AmouriRym KefiSonia Abdelhak
• Organismes : Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Institut Pasteur de Tunis Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Unité de recherche d'oculogénétique, Service B Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Institut Pasteur de Tunis Unité de recherche d'oculogénétique, Service B Département de Pédiatrie, Unité des maladies métaboliques héréditaires Département de Pédiatrie, Unité des maladies métaboliques héréditaires Service de dermatologie Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Institut Pasteur de Tunis Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory Laboratoire de Génomique Biomédicale et Oncogénétique - Biomedical Genomics and Oncogenetics Laboratory
• Publié dans American Journal of Human Biology le 29/10/2020

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Résumé : Objectives Consanguinity is common in Tunisia. However, little information exists on its impact on recessive disorders. In this study, we evaluate the impact of consanguineous marriages on the occurrence of some specific autosomal recessive disorders and consider how other factors, such as population substructure and mutation frequency, may be of equal importance in disease prevalence. Methods Consanguinity profiles were retrospectively studied among 425 Tunisian patients suffering from autosomal recessive xeroderma pigmentosum, dystrophic epidermolysis bullosa, nonsyndromic retinitis pigmentosa, Gaucher disease, Fanconi anemia, glycogenosis type I, and ichthyosis, and compared to those of a healthy control sample. Results Consanguinity was observed in 341 cases (64.94%). Consanguinity rates per disease were 75.63, 63.64, 60.64, 61.29, 57.89, 73.33, and 51.28%, respectively. First-cousin marriages were the most common form of consanguinity (48.94%) with the percentages of 55.46, 45.46, 47.87, 48.39, 45.61, 56.66, and 35.90%, respectively. A very high level of geographic endogamy was also observed (93.92%), with the values by disease ranging between 75.86 and 96.64%. We observed an overall excess risk associated to consanguinity of nearly sevenfold which was proportional to the number of affected siblings and the frequency of disease allele in the family. Consanguinity was significantly associated with the first five cited diseases (odds ratio=24.41, 15.17, 7.5, 5.53, and 5.07, respectively). However, no meaningful effects were reported among the remaining diseases. Conclusions This study reveals a variation in the excess risk linked to consanguinity according to the type of disorder, suggesting the potential of cryptic population substructure to contribute to disease incidence in populations with complex social structure like Tunisia. It also emphasizes the role of other health and demographic aspects such as mutation frequency and reproductive replacement in diseases etiology. (c) 2015 Wiley Periodicals, Inc.

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Fichiers liés : Halim_et_al-2016-American_Journal_of_Human_Biology.pdf

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