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Your search keyword '"Vincent Semetey"' showing total 7 results
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7 results on '"Vincent Semetey"'

1. Characterization of end-of-life LED lamps: Evaluation of reuse, repair and recycling potential

Author

Moheddine, Wehbie and Vincent, Semetey

Subjects
Waste Management and Disposal
Abstract

The characterization of wastes constituted by LED lamps at the end of their lives is currently a concern of researchers and environmental managers not only because of the large volume will be generated by such wastes, but also to identify appropriate strategies for their reuse as well as their recyclability. This research describes the different steps involved in the characterization of LED lamps at the end of their lives such as, testing the functionality of the whole lamps, as well as modules and the LED components of the non-functional lamps. The results revealed that about 30.8 % of the wasted LED lamps are still working and could be reused in the social and solidarity economy or remarketed if economically viable. On the other hand, functionality test of the non-functional lamps showed that 56.5 % of the LED modules and 75% of the LED chips are still functional. Our investigations revealed that, repairing the non-functional lamps or reusing their functional components is challenging and therefore, their recycling is highly recommended.

Published
2022
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3. Contributors

Author

Mohamed Hatha Abdulla, Ann Rose Abraham, Pinky Abraham, Jiji Abraham, Arjun Ajith Mohan, A. Anil, P. Anitha, Pius Augustine, Saji Augustine, S. Balasubramanian, Aadil Bathla, Abhishek Bhattacharjee, Sanjib Bhattacharyya, M. Bindu, Subir Kumar Biswas, Suryasarathi Bose, Sandeep Chaudhary, Suchitra Rajput Chauhan, Ashwini Chauhan, Jincemon Cyriac, Mónica Cristina García, Soney C. George, Sumana Ghosh, Sruthi Gopal, K.P. Greeshma, Noel Jacob Kaleekkal, Sam John, Shiny Joseph, Khasthi Ballabh Joshi, Nandakumar Kalarikkal, Mohd Jahir Khan, S. Kiran, Indradeep Kumar, Yuanhua Lin, Mary R. Louis, S. Malathi, Akshit Malhotra, P.P. Manzur Ali, Muthuchamy Maruthupandy, Sunny Mathew, Aishwarya V. Menon, Monalisa Mishra, A.A. Mohamed Hatha, Sumit Mukherjee, Thillaichidambaram Muneeswaran, Vimal Antony Muttathettu, Giuvanni Mutton, Sonali Naik, Reetuparna Nanda, S. Narayana Kalkura, Bonamali Pal, Shiny Palatty, Partha Palit, Punyatoya Panda, Nishit Pathak, Subhashree Priyadarsini, Franck Quero, K.R. Rekha Mol, B.P. Resmi, N. Sandhyarani, K. Sapna, Anurag Satpathy, Vincent Semetey, Md. Iftekhar Shams, Sreekala S. Sharma, Devansh Sharma, Laxmi Gayatri Sorokhaibam, Sreelakshmi Rajeevan, Rajesh Srivastava, Alagappan Subramaniyan, Divya P. Sukumaran, Sathyavathi Sundararaju, Mohd Talha, Sabu Thomas, Arun Torris, G. Unnikrishnan, Ruby Varghese, Thirumalaisamy Vennila, Vandana Vinayak, Xianpeng Yang, and Hiroyuki Yano

Published
2023
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5. Dynamics of Endothelial Engagement and Filopodia Formation in Complex 3D Microscaffolds

Author

Pierre Ucla, Xingming Ju, Melisa Demircioglu, Sarah Baiz, Laurent Muller, Stéphane Germain, Catherine Monnot, Vincent Semetey, Sylvie Coscoy, Laboratoire Physico-Chimie Curie [Institut Curie] (PCC), Institut Curie [Paris]-Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL), Laboratoire Procédés et Ingénierie en Mécanique et Matériaux (PIMM), Conservatoire National des Arts et Métiers [CNAM] (CNAM), HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM)-Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Sciences et Technologies, HESAM Université - Communauté d'universités et d'établissements Hautes écoles Sorbonne Arts et métiers université (HESAM), Centre interdisciplinaire de recherche en biologie (CIRB), Labex MemoLife, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Collège de France (CdF (institution))-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), and Coscoy, Sylvie

Subjects
[SDV]Life Sciences [q-bio], microtopography, Neovascularization, Physiologic, macromolecular substances, Sciences de l'ingénieur, contractility, Mechanotransduction, Cellular, Catalysis, Inorganic Chemistry, angiogenesis, filopodia, Human Umbilical Vein Endothelial Cells, Humans, Pseudopodia, Physical and Theoretical Chemistry, Molecular Biology, Myosin-Light-Chain Kinase, two-photon polymerization, endothelial cells, mechanotransduction, Spectroscopy, Tissue Scaffolds, Organic Chemistry, Endothelial Cells, General Medicine, Computer Science Applications, [SDV] Life Sciences [q-bio]
Abstract

The understanding of endothelium–extracellular matrix interactions during the initiation of new blood vessels is of great medical importance; however, the mechanobiological principles governing endothelial protrusive behaviours in 3D microtopographies remain imperfectly understood. In blood capillaries submitted to angiogenic factors (such as vascular endothelial growth factor, VEGF), endothelial cells can transiently transdifferentiate in filopodia-rich cells, named tip cells, from which angiogenesis processes are locally initiated. This protrusive state based on filopodia dynamics contrasts with the lamellipodia-based endothelial cell migration on 2D substrates. Using two-photon polymerization, we generated 3D microstructures triggering endothelial phenotypes evocative of tip cell behaviour. Hexagonal lattices on pillars (“open”), but not “closed” hexagonal lattices, induced engagement from the endothelial monolayer with the generation of numerous filopodia. The development of image analysis tools for filopodia tracking allowed to probe the influence of the microtopography (pore size, regular vs. elongated structures, role of the pillars) on orientations, engagement and filopodia dynamics, and to identify MLCK (myosin light-chain kinase) as a key player for filopodia-based protrusive mode. Importantly, these events occurred independently of VEGF treatment, suggesting that the observed phenotype was induced through microtopography. These microstructures are proposed as a model research tool for understanding endothelial cell behaviour in 3D fibrillary networks.

Published
2021
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