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109 results on '"Ben-Amor, H."'

5. Improvement in ocular symptoms and signs in patients with Demodex anterior blepharitis using a novel terpinen-4-ol (2.5%) and hyaluronic acid (0.2%) cleansing wipe

Author

Messaoud R, El Fekih L, Mahmoud A, Ben Amor H, Bannour R, Doan S, and Khairallah M

Subjects
Blepharitis, Cleansing wipe, Demodex, Eyelid hygiene, Terpinen-4-ol, Hyaluronic acid, Ophthalmology, RE1-994
Abstract

Riadh Messaoud,1 Lamia El Fekih,2,3 Anis Mahmoud,1 Hager Ben Amor,4 Radhouane Bannour,5 Serge Doan,6,7 Moncef Khairallah41Department of Ophthalmology, Tahar Sfar University Hospital, Mahdia, Tunisia; 2Department of Ophthalmology, Internal Security Forces Hospital, La Marsa, Tunisia; 3Faculty of Medicine, Tunis-El Manar University, Tunis, Tunisia; 4Fattouma Bourguiba University Hospital, Monastir, Tunisia; 5Ophthalmology Private Practice, Monastir, Tunisia; 6Department of Ophthalmology, Bichat Hospital, Paris, France; 7Fondation A de Rothschild, Paris, FrancePurpose: To evaluate the clinical improvement in ocular symptoms and signs in patients suffering from Demodex anterior blepharitis after using a novel cleansing wipe impregnated with 2.5% terpinen-4-ol and 0.2% hyaluronic acid.Study design: This was an exploratory, multicenter, open, randomized, two-parallel group comparative study.Methods: Forty-eight patients with Demodex anterior blepharitis were randomly assigned to apply the sterile wipe T1172 (Blephademodex®), either once daily (n=24, Group 1) or twice daily (n=24, Group 2) for 29 days. Overall ocular discomfort and other individual symptoms were measured using a 0–10 numeric rating scale at Day 8 and Day 29. Ocular signs, including eyelid margin hyperemia and number of cylindrical dandruff, were examined at slit lamp. Overall treatment performance by investigator, patient satisfaction and tolerance were evaluated with questionnaires.Results: Overall ocular discomfort was significantly reduced from baseline (p

Published
2019

6. Enhanced Photocatalytic Kinetics Using HDTMA Coated TiO2-Smectite Composite for the Oxidation of Diclofenac under Solar Light

Author

Universitat Rovira i Virgili, Fellah, I; Djellabi, R; Ben Amor, H; Hamdi, N; Ordonez, MF; Bianchi, CL, Universitat Rovira i Virgili, and Fellah, I; Djellabi, R; Ben Amor, H; Hamdi, N; Ordonez, MF; Bianchi, CL

Abstract

Slow kinetics is one of the capital issues of photocatalytic technology because of its heterogeneous nature, which involves multi-step processes. Herein, we show that the simple modification of the sol-gel-based TiO2-smectite composite by hexadecyltrimethylammonium bromide (HDTMA) significantly boosts adsorption and photocatalytic efficient sol-gel-based light towards the removal of diclofenac from water. Three photocatalysts were prepared, including TiO2, TiO2-smectite, and HDTMA-TiO2-smectite. The materials were characterized to understand the surface interaction and crystal characteristics. In terms of photoactivity, it was found that the addition of HDTMA to TiO2-smectite improved the removal rate by twice. HDTMA changes the functional groups to TiO2-smectite composite allowing enhanced adsorption and photoactivity through the so-called Adsorb and Shuttle process. The recycling tests show that HDTMA-TiO2-smectite can be used up to four times with good performance. This modification approach could intensify the removal of pollutants from water instead of using complicated and costly techniques.

Published
2023

7. Valorization of lignocellulosic biomass into sustainable materials for adsorption and photocatalytic applications in water and air remediation

Author

Enginyeria Química, Universitat Rovira i Virgili, Mergbi, M; Galloni, MG; Aboagye, D; Elimian, E; Su, PD; Ikram, BM; Nabgan, W; Bedia, J; Ben Amor, H; Contreras, S; Medina, F; Djellabi, R, Enginyeria Química, Universitat Rovira i Virgili, and Mergbi, M; Galloni, MG; Aboagye, D; Elimian, E; Su, PD; Ikram, BM; Nabgan, W; Bedia, J; Ben Amor, H; Contreras, S; Medina, F; Djellabi, R

Abstract

An exponential rise in global pollution and industrialization has led to significant economic and environmental problems due to the insufficient application of green technology for the chemical industry and energy production. Nowadays, the scientific and environmental/industrial communities push to apply new sustainable ways and/or materials for energy/environmental applications through the so-called circular (bio)economy. One of today's hottest topics is primarily valorizing available lignocellulosic biomass wastes into valuable materials for energy or environmentally related applications. This review aims to discuss, from both the chemistry and mechanistic points of view, the recent finding reported on the valorization of biomass wastes into valuable carbon materials. The sorption mechanisms using carbon materials prepared from biomass wastes by emphasizing the relationship between the synthesis route or/and surface modification and the retention performance were discussed towards the removal of organic and heavy metal pollutants from water or air (NOx, CO2, VOCs, SO2, and Hg0). Photocatalytic nanoparticle-coated biomass-based carbon materials have proved to be successful composites for water remediation. The review discusses and simplifies the most raised interfacial, photonic, and physical mechanisms that might take place on the surface of these composites under light irradiation. Finally, the review examines the economic benefits and circular bioeconomy and the challenges of transferring this technology to more comprehensive applications.© 2023. The Author(s).

Published
2023

8. Fast g-C3N4 sonocoated activated carbon for enhanced solar photocatalytic oxidation of organic pollutants through Adsorb & Shuttle process

Author

Universitat Rovira i Virgili, Mergbi, M; Aboagye, D; Contreras, S; Ben Amor, H; Medina, F; Djellabi, R, Universitat Rovira i Virgili, and Mergbi, M; Aboagye, D; Contreras, S; Ben Amor, H; Medina, F; Djellabi, R

Abstract

To solve low mass transfer in photocatalytic technology for water treatment, the combination of photoactive nanoparticles with highly adsorptive materials has been regarded as a successful approach. The optimization of photoactive particle coating in terms of dispersion on the surface of adsorbing support is the main key to reach a maximum synergism for pollutants removal. This study discusses the coating of as-prepared biomass based activated carbon by g-C3N4 using three routes, namely ball milling (AC-CN@BM), physical stirring (AC-CN@Phy) and ultrasonic assisted coating (AC-CN@US). The coating mechanisms by different processes were discussed using different characterization techniques. Ball milling based coating provides good g-C3N4 dispersion on the surface of AC, however, a partial degradation of g-C3N4 structure and a lower surface area were confirmed by FTIR, XRD and BET analysis. Physically designed sample shows a significant agglomeration of particles on the surface of AC. However, ultrasonic coating provides excellent distribution of g-C3N4 and high surface of the composite. In terms of photoactivity, AC-CN@BM exhibits the lowest adsorption and photocatalytic activity under solar light for the removal of ciprofloxacin. AC-CN@Phy showed medium performance, but less physical stability of g-C3N4 particles on AC, leading to their partial release. AC-CN@US showed the highest efficiency and stability after using; suggesting the good combination between g-C3N4 and AC, which in turn maximizes the removal of ciprofloxacin via Adsorb & shuttle process. The overall costs of composite, including the starting elements and the coating ultrasonic process are relatively low and green as compared to commonly reported routes.

Published
2023

17. Tuberculosis

Author

Khairallah, M., primary, Khochtali, S., additional, Mahmoud, A., additional, and Ben Amor, H., additional

Published
2017
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19. Andrology (Male Fertility, Spermatogenesis)

Author

Matsumoto, Y., primary, Goto, S., additional, Hashimoto, H., additional, Kokeguchi, S., additional, Shiotani, M., additional, Okada, H., additional, Cohen - Bacrie, P., additional, Hazout, A., additional, Belloc, S., additional, De Mouzon, J., additional, Menezo, Y., additional, Dumont, M., additional, Junca, A. M., additional, Cohen-Bacrie, M., additional, Alvarez, S., additional, Olivennes, F., additional, Prisant, N., additional, Weltin, M., additional, Geissler, W., additional, Clussmann, C., additional, Strowitzki, T., additional, Eggert-Kruse, W., additional, Endou, Y., additional, Fjii, Y., additional, Motoyama, H., additional, Quintana, F. Q., additional, Zaloa Larreategui, Z. L., additional, Iratxe Penalba, I. P., additional, Sara Ortega, S. O., additional, Monica Martin, M. M., additional, Guillermo Quea, G. Q., additional, Jose Serna, J. S., additional, Showell, M. G., additional, Brown, J., additional, Yazdani, A., additional, Stankiewicz, M. T., additional, Hart, R. J., additional, Zumoffen, C., additional, Munuce, M. J., additional, Caille, A., additional, Ghersevich, S., additional, Lendinez, A. M., additional, Perez-Nevot, B., additional, Palomares, A. R., additional, Serrano Garballo, A., additional, Rodriguez, A., additional, Reche, A., additional, Mayor-Olea, A., additional, Ruiz-Galdon, M., additional, Reyes-Engel, A., additional, Mendiola, J., additional, Jorgensen, N., additional, Andersson, A. M., additional, Calafat, A. M., additional, Redmon, J. B., additional, Drobnis, E. Z., additional, Wang, C., additional, Sparks, A., additional, Thurston, S. W., additional, Liu, F., additional, Swan, S. H., additional, Tarasconi, A. C., additional, Tarasconi, B. V., additional, Tarasconi, D. V., additional, Silva, E. M. V., additional, Fujii, Y., additional, Crha, I., additional, Pribyl, J., additional, Skladal, P., additional, Zakova, J., additional, Ventruba, P., additional, Pohanka, M., additional, De La Fuente, G., additional, Pacheco, A., additional, Velasco, J. A. G., additional, Requena, A., additional, Pacheco Castro, A., additional, San Celestino Carchenilla, M., additional, Salvanes, R., additional, Arnanz, A., additional, Balmori, C., additional, Pellicer, A., additional, Garcia-Velasco, J. A., additional, Ishikawa, T., additional, Fujisawa, M., additional, Kranz, S., additional, Hersemeyer, K., additional, Hentrich, A., additional, Tinneberg, H. R., additional, Konrad, L., additional, Simon, L., additional, Lutton, D., additional, McManus, J., additional, Lewis, S. E. M., additional, Rubio, S., additional, Simon Sanjurjo, P., additional, Lewis, S., additional, Buzzi, J., additional, Valcarcel, A., additional, Lombardi, E., additional, Oses, R., additional, Rawe, V., additional, Young, E., additional, Magendzo, A., additional, Lizama, S., additional, Duque, G., additional, Mackenna, A., additional, Monqaut, A., additional, Zavaleta, C., additional, Lopez, G., additional, Lafuente, R., additional, Brassesco, M., additional, Condorelli, R., additional, La Vignera, S., additional, La Rosa, S., additional, Barone, N., additional, Vicari, E., additional, Bellanca, S., additional, D'Agata, R., additional, Calogero, A. E., additional, Enciso, M., additional, Iglesias, M., additional, Galan, I., additional, Gosalvez, A., additional, Gosalvez, J., additional, Curaba, M., additional, Poels, J., additional, Van Langendonckt, A., additional, Donnez, J., additional, Wyns, C., additional, Garcez, M., additional, Salvador, M., additional, Pasqualotto, E. B., additional, Braga, D. P. A. F., additional, Borges, E., additional, Pasqualotto, F. F., additional, Aoki, T., additional, Figueira, R. C. S., additional, Maldonado, L. G. L., additional, Iaconelli, A., additional, Frassini, R., additional, Mandelli, J., additional, Setti, A. S., additional, Cortezzi, S. S., additional, Di Mauro, M., additional, Burrello, N., additional, Kashir, J., additional, Jones, C., additional, Young, C., additional, Ruas, M., additional, Grasa, P., additional, Rietdorf, K., additional, Heytens, E., additional, Heindryckx, B., additional, Yoon, S. Y., additional, Fissore, R. A., additional, Deane, C. M., additional, Nikiforaki, D., additional, Tee, S. T., additional, de Sutter, P., additional, Parrington, J., additional, Coward, K., additional, Visser, L., additional, Westerveld, G. H., additional, van Daalen, S. K. M., additional, van der Veen, F., additional, Lombardi, M. P., additional, Repping, S., additional, Cubillos, S., additional, Sanchez, S., additional, Pedraza, J., additional, Charria, G., additional, Aparicio, H., additional, Gongora, A., additional, Caldino, F., additional, Cuneo, S., additional, Ou, J. P., additional, Zhao, W. E., additional, Liu, Y. F., additional, Xu, Y. W., additional, Zhou, C. Q., additional, Al-Asmar Pinar, N., additional, Peinado, V., additional, Gruhn, J., additional, Susiarjo, M., additional, Gil-Salom, M., additional, Martinez-Jabaloyas, J. M., additional, Remohi, J., additional, Rubio, C., additional, Hassold, T., additional, Al-Asmar, N., additional, Rodrigo, L., additional, Hassold, T. J., additional, Bungum, M., additional, Forsell, N., additional, Giwercman, A., additional, Amiri, I., additional, Sheikh, N., additional, Najafi, R., additional, Godarzi, M., additional, Farimani, M., additional, Makukh, H., additional, Tyrkus, M., additional, Zastavna, D., additional, Nakonechnuy, A., additional, Khayat, S. S., additional, Schileiko, L. V., additional, Kurilo, L. F., additional, Garcia-Herrero, S., additional, Garrido, N., additional, Martinez-Conejero, J. A., additional, Romany, L., additional, Meseguer, M., additional, Dorphin, B., additional, Lefevre, M., additional, Gout, C., additional, Oger, P., additional, Yazbeck, C., additional, Rougier, N., additional, De Stefani, S., additional, Scala, V., additional, Benedetti, S., additional, Tagliamonte, M. C., additional, Zavagnini, E., additional, Palini, S., additional, Bulletti, C., additional, Canestrari, F., additional, Subiran, N., additional, Pinto, F. M., additional, Candenas, M. L., additional, Agirregoitia, E., additional, Irazusta, J., additional, Cha, E. M., additional, Lee, J. H., additional, Park, I. H., additional, Lee, K. H., additional, Kim, M. H., additional, Jensen, M. S., additional, Rebordosa, C., additional, Thulstrup, A. M., additional, Toft, G., additional, Sorensen, H. T., additional, Bonde, J. P., additional, Henriksen, T. B., additional, Olsen, J., additional, Bosco, L., additional, Speciale, M., additional, Manno, M., additional, Amireh, N., additional, Roccheri, M. C., additional, Cittadini, E., additional, Wu, P., additional, Lee, Y. M., additional, Chen, H. W., additional, Tzeng, C. R., additional, Llacer, J., additional, Ten, J., additional, Lledo, B., additional, Rodriguez-Arnedo, A., additional, Morales, R., additional, Bernabeu, R., additional, Garcia-Peiro, A., additional, Martinez-Heredia, J., additional, Oliver-Bonet, M., additional, Ribas, J., additional, Abad, C., additional, Amengual, M. J., additional, Navarro, J., additional, Benet, J., additional, Moutou, C., additional, Gardes, N., additional, Nicod, J. C., additional, Becker, N., additional, Bailly, M. P., additional, Galland, I., additional, Pirello, O., additional, Rongieres, C., additional, Wittemer, C., additional, Viville, S., additional, Elmahaishi, W., additional, Smith, B., additional, Doshi, A., additional, Serhal, P., additional, Harper, J. C., additional, Rennemeier, C., additional, Kammerer, U., additional, Dietl, J., additional, Staib, P., additional, Elgmati, K., additional, Nomikos, M., additional, Theodoridou, M., additional, Calver, B., additional, Swann, K., additional, Lai, F. A., additional, Georgiou, I., additional, Lazaros, L., additional, Xita, N., additional, Kaponis, A., additional, Plachouras, N., additional, Hatzi, E., additional, Zikopoulos, K., additional, Ferfouri, F., additional, Clement, P., additional, Molina Gomes, D., additional, Albert, M., additional, Bailly, M., additional, Wainer, R., additional, Selva, J., additional, Vialard, F., additional, Takisawa, T., additional, Usui, K., additional, Kyoya, T., additional, Shibuya, Y., additional, Hattori, H., additional, Sato, Y., additional, Ota, M., additional, Kyono, K., additional, Chiu, P. C., additional, Lam, K. K., additional, Lee, C. L., additional, Chung, M. K., additional, Huang, V. W., additional, O, W. S., additional, Tang, F., additional, Ho, P. C., additional, Yeung, W. S., additional, Kim, C. H., additional, Lee, J. Y., additional, Kim, S. H., additional, Suh, C. S., additional, Shin, Y. K., additional, Kang, Y. J., additional, Jung, J. H., additional, Cha, C. Y., additional, Hwang, E. S., additional, Mukaida, T., additional, Nagaba, M., additional, Takahashi, K., additional, Elkaffash, D., additional, Sedrak, M., additional, Huhtaniemi, I., additional, Abdel-Al, T., additional, Younan, D., additional, Cassuto, N. G., additional, Bouret, D., additional, Hammoud, I., additional, Barak, Y., additional, Seshadri, S., additional, Bates, M., additional, Vince, G., additional, Jones, D. I., additional, Ben Khalifa, M., additional, Montjean, D., additional, Cohen-Bacrie, P., additional, Aubriot, F. X., additional, Cohen, M., additional, Boudjema, E., additional, Magli, M. C., additional, Crippa, A., additional, Baccetti, B., additional, Ferraretti, A. P., additional, Gianaroli, L., additional, Singer, T., additional, Neri, Q. V., additional, Hu, J. C., additional, Maggiulli, R., additional, Kollman, Z., additional, Rauch, E., additional, Schlegel, P. N., additional, Rosenwaks, Z., additional, Palermo, G. D., additional, Zorn, B., additional, Skrbinc, B., additional, Matos, E., additional, Golob, B., additional, Pfeifer, M., additional, Osredkar, J., additional, Sabanegh, E., additional, Sharma, R. K., additional, Thiyagarajan, A., additional, Agarwal, A., additional, Robin, G., additional, Boitrelle, F., additional, Marcelli, F., additional, Marchetti, C., additional, Mitchell, V., additional, Dewailly, D., additional, Rigot, J. M., additional, Rives, N., additional, Perdrix, A., additional, Travers, A., additional, Milazzo, J. P., additional, Mousset-Simeon, N., additional, Mace, B., additional, Jakab, A., additional, Molnar, Z., additional, Benyo, M., additional, Levai, I., additional, Kassai, Z., additional, Ihan, A., additional, Kopitar, A., additional, Kolbezen, M., additional, Vaamonde, D., additional, Da Silva-Grigoletto, M. E., additional, Garcia-Manso, J. M., additional, Vaamonde-Lemos, R., additional, Oehninger, S. C., additional, Walis, G., additional, Monahan, D., additional, Ermolovich, E., additional, Fadlon, E., additional, Abu Elhija, A., additional, Abu Elhija, M., additional, Lunenfeld, E., additional, Huleihel, M., additional, Costantini-Ferrando, M., additional, Hu, J. C. Y., additional, Alvarez, J. G., additional, Velilla, E., additional, Lopez-Teijon, M., additional, Lopez-Fernandez, C., additional, Tempest, H. G., additional, Sun, F., additional, Ko, E., additional, Turek, P., additional, Martin, R. H., additional, Zomeno-Abellan, M. T., additional, Ramirez, A., additional, Gutierrez-Adan, A., additional, Martinez, J. C., additional, Landeras, J., additional, Ballesta, J., additional, Aviles, M., additional, Ganaiem, M., additional, Binder, S., additional, Meinhardt, A., additional, Sousa, L., additional, Grangeia, A., additional, Carvalho, F., additional, Sousa, M., additional, Barros, A., additional, Sifer, C., additional, Sermondade, N., additional, Hafhouf, E., additional, Poncelet, C., additional, Benzacken, B., additional, Levy, R., additional, Wolf, J. P., additional, Crisol, L., additional, Aspichueta, F., additional, Hernandez, M. L., additional, Exposito, A., additional, Matorras, R., additional, Ruiz-Larrea, M. B., additional, Ruiz-Sanz, J. I., additional, Jallad, S., additional, Atig, F., additional, Ben Amor, H., additional, Saad, A. L. I., additional, Kerkeni, A., additional, Ajina, M., additional, Othmane, A. L. I., additional, Koscinski, I., additional, Ladureau, L., additional, Scarselli, F., additional, Casciani, V., additional, Lobascio, M., additional, Minasi, M. G., additional, Rubino, P., additional, Colasante, A., additional, Arizzi, L., additional, Litwicka, K., additional, Iammarrone, E., additional, Ferrero, S., additional, Mencacci, C., additional, Franco, G., additional, Zavaglia, D., additional, Nagy, Z. P., additional, Greco, E., additional, Ohgi, S., additional, Takahashi, M., additional, Kishi, C., additional, Suga, K., additional, Yanaihara, A., additional, Chamley, L. W., additional, Wagner, A., additional, and Shelling, A. N., additional

Published
2010
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34. Special issue on robot learning for human-robot collaboration

Author

Rozo, L., Ben Amor, H., Calinon, S., Dragan, A., and Lee, D.

Subjects
robot learning, human-robot collaboration
Abstract

The goal of this special issue is to document and highlight recent progress in robot learning for human–robot collaboration (HRC), covering a diversity of articles that reflect the state-of-the-art in the field. Following an open call for papers, we received more than fifty submissions, among which ten articles were selected for the special issue, covering exciting applications spanning co-manipulation, medical robotics, and social behaviors. These works and five additional papers compose a fascinating online topical collection that reports a larger diversity of research advancements in learning for HRC.

35. Interaction primitives for human-robot cooperation tasks

Author

Ben Amor, H., Neumann, Gerhard, Kamthe, S., Kroemer, O., Peters, J., Ben Amor, H., Neumann, Gerhard, Kamthe, S., Kroemer, O., and Peters, J.

Abstract

To engage in cooperative activities with human partners, robots have to possess basic interactive abilities and skills. However, programming such interactive skills is a challenging task, as each interaction partner can have different timing or an alternative way of executing movements. In this paper, we propose to learn interaction skills by observing how two humans engage in a similar task. To this end, we introduce a new representation called Interaction Primitives. Interaction primitives build on the framework of dynamic motor primitives (DMPs) by maintaining a distribution over the parameters of the DMP. With this distribution, we can learn the inherent correlations of cooperative activities which allow us to infer the behavior of the partner and to participate in the cooperation. We will provide algorithms for synchronizing and adapting the behavior of humans and robots during joint physical activities.

36. Learning interaction for collaborative tasks with probabilistic movement primitives

Author

Maeda, G., Ewerton, M., Lioutikov, R., Ben Amor, H., Peters, J., Neumann, G., Maeda, G., Ewerton, M., Lioutikov, R., Ben Amor, H., Peters, J., and Neumann, G.

Abstract

This paper proposes a probabilistic framework based on movement primitives for robots that work in collaboration with a human coworker. Since the human coworker can execute a variety of unforeseen tasks a requirement of our system is that the robot assistant must be able to adapt and learn new skills on-demand, without the need of an expert programmer. Thus, this paper leverages on the framework of imitation learning and its application to human-robot interaction using the concept of Interaction Primitives (IPs). We introduce the use of Probabilistic Movement Primitives (ProMPs) to devise an interaction method that both recognizes the action of a human and generates the appropriate movement primitive of the robot assistant. We evaluate our method on experiments using a lightweight arm interacting with a human partner and also using motion capture trajectories of two humans assembling a box. The advantages of ProMPs in relation to the original formulation for interaction are exposed and compared.

41. WearMoCap: multimodal pose tracking for ubiquitous robot control using a smartwatch.

Author

Weigend FC, Kumar N, Aran O, and Ben Amor H

Abstract

We present WearMoCap, an open-source library to track the human pose from smartwatch sensor data and leveraging pose predictions for ubiquitous robot control. WearMoCap operates in three modes: 1) a Watch Only mode, which uses a smartwatch only, 2) a novel Upper Arm mode, which utilizes the smartphone strapped onto the upper arm and 3) a Pocket mode, which determines body orientation from a smartphone in any pocket. We evaluate all modes on large-scale datasets consisting of recordings from up to 8 human subjects using a range of consumer-grade devices. Further, we discuss real-robot applications of underlying works and evaluate WearMoCap in handover and teleoperation tasks, resulting in performances that are within 2 cm of the accuracy of the gold-standard motion capture system. Our Upper Arm mode provides the most accurate wrist position estimates with a Root Mean Squared prediction error of 6.79 cm. To evaluate WearMoCap in more scenarios and investigate strategies to mitigate sensor drift, we publish the WearMoCap system with thorough documentation as open source. The system is designed to foster future research in smartwatch-based motion capture for robotics applications where ubiquity matters. www.github.com/wearable-motion-capture., Competing Interests: NK and OA were employed by the Corporate Functions-R&D, Procter and Gamble. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (Copyright © 2025 Weigend, Kumar, Aran and Ben Amor.)

Published
2025
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42. Optical Coherence Tomography and Optical Coherence Tomography Angiography in Neglected Diseases.

Author

Mahendradas P, Acharya I, Rana V, Bansal R, Ben Amor H, and Khairallah M

Subjects
Humans, Retinal Diseases diagnostic imaging, Retinal Diseases diagnosis, Choroid diagnostic imaging, Choroid pathology, Tomography, Optical Coherence methods, Fluorescein Angiography methods, Neglected Diseases diagnostic imaging, Neglected Diseases diagnosis
Abstract

A group of self-limiting and frequently neglected diseases exist in the literature like Rickettsial disease, Malaria, Dengue fever, Chikungunya, West Nile virus infection, Rift Valley fever, Bartonellosis, or Lyme disease which are poorly understood due to lack of proper diagnostic testing. Currently, multimodal imaging has become a critical modality in the diagnosis and management of ocular diseases. Optical coherence tomography (OCT) is one such remarkable imaging modality in the field of ophthalmology providing high-resolution, cross-sectional images of the retina and choroid with the recent advances such as enhanced depth imaging and swept source OCT. Additionally, OCT angiography (OCTA) has further revolutionised dynamic imaging of retinal and choroidal vasculature non-invasively. This review article highlights the OCT and OCTA biomarkers in the diagnosis and prognosis of the aforementioned neglected diseases.

Published
2024
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43. Removal of Organic Matter from Tunisian Industrial Phosphoric Acid by Adsorption onto Purified Natural Illite/Kaolinite Clay: Kinetics, Isothermal and Thermodynamic Studies.

Author

Oueriemi S, Ben Amor H, Hassen W, Hadrich B, Maatki C, Kriaa K, and Kolsi L

Abstract

This work aims to use a green, economical and efficient adsorbent to remove organic matter from Tunisian industrial wet phosphoric acid (WPA: 52% P 2 O 5 ). For this purpose, a natural and abundant clay is extracted from the Douiret, Tataouine deposit in southern Tunisia. This clay is being tested for the first time as an adsorbent in WPA medium. The raw clay and purified clay are analysed using standard analytical techniques such as Fourier transform infrared spectroscopy, X-ray diffraction, and BET methods. The results show that the raw clay is a mixture of illite and kaolinite, with other mineral impurities, mainly quartz. Organic matter adsorption tests show that the purified clay exhibits greater effectiveness than raw clay. The parametric study with purified clay indicates that temperature, contact time, and clay dosage strongly influence organic matter adsorption. The highest adsorption occurs at 60 °C after 50 min, reaching 56% with 8 g of purified clay per kg of WPA. Among several recognised models, the pseudo-second-order kinetic model and the Sips isotherm model are the most suitable for modelling the experimental data. This study suggests that Douiret clay can be considered an effective, inexpensive and environmentally friendly adsorbent for eliminating organic matter in industrial phosphoric acid.

Published
2023
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44. Swept-source Optical Coherence Tomography Angiography in Active and Scarred Toxoplasmic Retinochoroiditis.

Author

Nabi W, Ben Amor H, Zina S, Kadri A, Khochtali S, Abroug N, Ksiaa I, and Khairallah M

Subjects
Humans, Fluorescein Angiography methods, Tomography, Optical Coherence methods, Cicatrix pathology, Retrospective Studies, Choroid pathology, Retinal Vessels pathology, Toxoplasmosis, Ocular pathology
Abstract

Purpose: To describe optical coherence tomography angiography (OCTA) findings in eyes with active and scarred toxoplasmic retinochoroiditis., Methods: OCTA scans in active (25 eyes) and scarred (17 eyes) retinochoroiditis were retrospectively reviewed., Results: In active lesions, OCTA findings included a non-detectable flow signal area in retinal vascular plexuses and choriocapillaris in all 25 eyes (100%), an abnormal intraretinal vascular process in 2 eyes (8%), and an associated area of retinal flow deficit secondary to branch retinal artery occlusion in one eye (4%). In scarred lesions, OCTA findings included a flow deficit area in retinal vascular plexuses and choriocapillaris in all 17 eyes (100%), a visibility of larger deeper choroidal vessels at the level of choriocapillaris in 9 eyes (53%), and a well-defined intraretinal vascular network in one eye (5.9%). Peripapillary scars were associated on OCTA with wedge-shaped loss of radial peripapillary capillaries with corresponding localized retinal nerve fiber layer defect and visual field loss., Conclusion: OCTA allows to non-invasively detect retinal and choroidal vascular changes in active and scarred toxoplasmic retinochoroiditis.

Published
2023
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45. A Comparative Study between Occlusive and Non-occlusive Retinal Vasculitis: Data from a Referral Center in Tunisia, North Africa.

Author

Abroug N, Khairallah M, Ksiaa I, Ben Amor H, Zina S, Attia S, Jelliti B, Khochtali S, and Khairallah M

Subjects
Humans, Male, Female, Tunisia epidemiology, Retrospective Studies, Referral and Consultation, Fluorescein Angiography, Retinal Vasculitis diagnosis, Retinal Vasculitis epidemiology, Retinal Vasculitis etiology, Behcet Syndrome complications, Behcet Syndrome diagnosis, Behcet Syndrome epidemiology
Abstract

Purpose: To compare clinical profile and visual outcomes of occlusive versus non-occlusive retinal vasculitis (RV)., Methods: A retrospective comparative study., Results: 284 patients were enrolled, including 124 patients with occlusive RV (ORV) and 160 patients with non-occlusive RV (NORV). Patients with ORV were older (p ≤ 10-3), predominantly male (p ≤10-3), with less bilateral involvement (31.5% vs 53,4%; p ≤ 10 -3 ). Infectious RV was more frequently diagnosed in the ORV group than in the NORV group (48.8% vs 32.9%, p = .006). Behçet disease and ocular tuberculosis were the leading causes of ORV. Idiopathic RV, Behçet disease, and sarcoidosis were the most common causes of NORV. Independent predictive factors of poor visual outcome were worse baseline visual acuity in both groups ( p = .006 and p ≤ 10-3, respectively), and retinal hemorrhages ( p = .048) and optic atrophy ( p = .040) in the ORV group., Conclusion: Occlusive and non-occlusive RV have distinctive clinical and etiological profile.

Published
2023
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46. Distinguishing swept-source optical coherence tomography findings in active toxoplasmic retinochoroiditis.

Author

Ksiaa I, Khochtali S, Mefteh M, Ben Fredj M, Ben Amor H, Abroug N, and Khairallah M

Subjects
Choroid pathology, Humans, Prospective Studies, Retinal Pigment Epithelium pathology, Tomography, Optical Coherence methods, Toxoplasmosis, Ocular diagnosis
Abstract

Objective: To define the swept-source optical coherence tomography (SS-OCT) features which distinguish ocular toxoplasmosis (OT) from other forms of retinochoroiditis., Methods: This is a prospective diagnostic study enrolling 43 eyes of 43 patients with active toxoplasmic (TOXO) retinochoroiditis matched to 54 eyes (54 lesions) with non-TOXO retinochoroiditis evaluated by structural SS-OCT., Results: The finding of retinal hyper-reflective round deposits, sub-lesional choroidal thickening, and sub-lesional retinal pigment epithelium elevation were more likely to be found in TOXO lesions with a positive likelihood ratio of 45.2 (95% CI: 6.45-316.56), 23.86 (95% CI: 6.09-93.36), and 9.79 (95% CI: 4.22-22.7), respectively. The presence of each of these findings was associated with a high level for positive predictive value (PPV) (88.63-97.29), negative predictive value (NPV) (88.3-92.45), sensitivity (83.72-90.69), and specificity (90.74-98.14). Two-parameter model binary logistic regression suggested that sub-lesional retinal pigment epithelium elevation and sub-lesional choroidal thickening were significant predictors of the diagnosis of OT (Wald = 11.905, p < 0.001; Wald = 14.881, p < 0.001; respectively). By adding hyper-reflective round deposits along the posterior hyaloid or the retinal surface the model improved its performance with very good diagnostic accuracy with area under the curve (AUC) values of 0.96 (95% CI: 0.9-0.99) for two parameters model and 0.98 (95% CI: 0.93-0.99) for the three parameters model., Conclusions: Our results show that three OCT findings including retinal hyper-reflective round deposits, sub-lesional choroidal thickening, and sub-lesional retinal pigment epithelium elevation are more likely to occur in OT patients as compared with non-OT patients., (© 2021. The Author(s), under exclusive licence to The Royal College of Ophthalmologists.)

Published
2022
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48. Hypopyon: Is-it Infective or Noninfective?

Author

Ksiaa I, Abroug N, Mahmoud A, Ben Amor H, Attia S, Khochtali S, and Khairallah M

Subjects
Endophthalmitis microbiology, Eye Infections, Bacterial microbiology, Humans, Suppuration physiopathology, Uveitis, Suppurative microbiology, Endophthalmitis physiopathology, Eye Infections, Bacterial physiopathology, Uveitis, Suppurative physiopathology
Abstract

Hypopyon usually corresponds to the sedimentation of white blood cells, and it signifies severe intraocular inflammation. This key clinical sign may occur in association with a wide variety of infectious, inflammatory, and neoplastic conditions that may be sight- and, occasionally, life-threatening. A careful history and thorough clinical examination are the cornerstones for orienting the differential diagnosis, identifying the causative agent, and initiating prompt and appropriate treatment. This review outlines the clinical characteristics and management of hypopyon in relation with the underlying causative infectious or noninfectious ocular or systemic diseases.

Published
2021
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49. Abducens nerve palsy with associated retinal involvement secondary to rickettsia typhi infection.

Author

Abderrahim K, Zina S, Khairallah M, Ben Amor H, Khochtali S, and Khairallah M

Abstract

Objective: To report a case of abducens nerve palsy with associated retinal involvement due to rickettsia typhi infection., Material and Methods: A single case report documented with multimodal imaging., Results: A 18-year-old woman with a history of high-grade fever was initially diagnosed with typhoid fever and treated with fluoroquinolone. She presented with a 5-day history of diplopia and headaches. Her best-corrected visual acuity was 20/20 in both eyes. Ocular motility examination showed left lateral gaze restriction. Lancaster test confirmed the presence of left abducens palsy. Fundus examination showed optic disc swelling in both eyes associated with superotemporal retinal hemorrhage and a small retinal infiltrate with retinal hemorrhage in the nasal periphery in the left eye. Magnetic resonance imaging (MRI) of the brain and orbits showed no abnormalities. A diagnosis of rickettsial disease was suspected and the serologic test for Richettsia Typhi was positive. The patient was treated with doxycycline (100 mg every 12 h) for 15 days with complete recovery of the left lateral rectus motility and resolution of optic disc swelling, retinal hemorrhages, and retinal infiltrate., Conclusion: Rickettsial disease should be considered in the differential diagnosis of abducens nerve palsy in any patient with unexplained fever from endemic area. Fundus examination may help establish an early diagnosis and to start an appropriate rickettsial treatment.

Published
2021
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50. Multimodal imaging in IRVAN syndrome presenting with Branch Retinal Artery Occlusion.

Author

Zina S, Ksiaa I, Abdelhedi C, Ben Amor H, Attia S, Khochtali S, and Khairallah M

Abstract

Purpose: To describe multimodal imaging findings in a patient with idiopathic retinal vasculitis, aneurysms, and neuroretinitis (IRVAN) syndrome presenting with branch retinal artery occlusion (BRAO)., Case Description: A 33-year-old woman presented with acute BRAO in the right eye. A diagnosis of underlying IRVAN syndrome was made based on the presence of arteriolar aneurysms on the optic disc and along major arterioles and faint retinal hard exudates in both eyes. Eight months later, best-corrected visual acuity was 20/25 in the right eye and 20/20 in the left eye. The hard exudates had increased, and there were extensive areas of peripheral retinal capillary nonperfusion without new vessels. Optical coherence tomography (OCT) showed a localized retinal thinning corresponding to the prior BRAO. Fundus autofluorescence showed nodulo-linear periarterial hypoautofluorescence. OCT angiography (OCTA) showed localized ischemic changes, mainly involving the deep capillary plexus, corresponding to the area of resolved BRAO. It also clearly delineated the optic disc aneurysms. The patient received bilateral scatter laser photocoagulation directed to areas of peripheral capillary nonperfusion. Over a 6-month follow-up period, visual acuity remained unchanged, and there was no evidence of disease progression., Conclusion: Multimodal imaging, including fundus autofluorescence, OCT, and OCTA can provide additional valuable information in the evaluation of IRVAN syndrome complicated with BRAO.

Published
2020
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