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78 results on '"Voicu, Ștefan Ioan"'

20. Biocompatible Composite Filaments Printable by Fused Deposition Modelling Technique: Selection of Tuning Parameters by Influence of Biogenic Hydroxyapatite and Graphene Nanoplatelets Ratios.

Author

Mocanu, Aura-Cătălina, Constantinescu, Andreea-Elena, Pandele, Mădălina-Andreea, Voicu, Ștefan Ioan, Ciocoiu, Robert-Cătălin, Batalu, Dan, Semenescu, Augustin, Miculescu, Florin, and Ciocan, Lucian-Toma

Subjects
FUSED deposition modeling, HYDROXYAPATITE, NANOPARTICLES, FIBERS, GRAPHENE, CHEMICAL bonds
Abstract

The proposed strategy for the extrusion of printable composite filaments follows the favourable association of biogenic hydroxyapatite (HA) and graphene nanoplatelets (GNP) as reinforcement materials for a poly(lactic acid) (PLA) matrix. HA particles were chosen in the <40 μm range, while GNP were selected in the micrometric range. During the melt–mixing incorporation into the PLA matrix, both reinforcement ratios were simultaneously modulated for the first time at different increments. Cylindrical composite pellets/test samples were obtained only for the mechanical and wettability behaviour evaluation. The Fourier-transformed infrared spectroscopy depicted two levels of overlapping structures due to the solid molecular bond between all materials. Scanning electron microscopy and surface wettability and mechanical evaluations vouched for the (1) uniform/homogenous dispersion/embedding of HA particles up to the highest HA/GNP ratio, (2) physical adhesion at the HA-PLA interface due to the HA particles' porosity, (3) HA-GNP bonding, and (4) PLA-GNP synergy based on GNP complete exfoliation and dispersion into the matrix. [ABSTRACT FROM AUTHOR]

Published
2024
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25. Influence of Ceramic Particles Size and Ratio on Surface—Volume Features of the Naturally Derived HA-Reinforced Filaments for Biomedical Applications

Author

Mocanu, Aura-Cătălina, primary, Miculescu, Florin, additional, Dascălu, Cătălina-Andreea, additional, Voicu, Ștefan Ioan, additional, Pandele, Mădălina-Andreea, additional, Ciocoiu, Robert-Cătălin, additional, Batalu, Dan, additional, Dondea, Sorina, additional, Mitran, Valentina, additional, and Ciocan, Lucian-Toma, additional

Published
2022
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29. List of contributors

Author

Abdelhamid, Hani Nasser, Acquah, Caleb, Adedamola, Adeyanju Adedayo, Ali, Heyam Saad, Bahrololoumi, Sara, Banerjee, Anurag, Behrouz, Sepideh, Beltran-Juarez, E., Bhattacharya, Hiranmoy, Bhattacharyya, Chiranjib, Bhowmik, Manas, Biswas, Swati, Bitire, Sarah, Boskabady, Mohammad Hossein, Bourais, Ilhame, Bouyahya, Abdelhakim, Campa-Mada, A., Carvajal-Millan, E., Chaitanya, M.V.N.L., Chakkittu Kandiyil, Amritha, Chakraborty, Pratik, Chintamaneni, Pavan Kumar, Costa, Diana, Danquah, Michael K., Das, Bhaskar, Das, Shilpa, Das Bidla, Pooja, De, Arnab, Dewanjee, Saikat, Dey, Abhijit, Elmarrkechy, Salma, Faria, Rúben, George, Archana, Govindan, Natanamurugaraj, Hasnain, Md Saquib, Hormozi, Behnoud, Ifi, Favour, Jain, Ankit, Jain, Sanjay K., Jeevanandam, Jaison, Ji, Vaishali, Kishore, Chandra, Krishnamurthy, Praveen Thaggikuppe, Krishnan, Saravanan, Kuppusamy, Palaniselvam, Lauria, Victoria Baggi Mendonça, Machich, Omar, Maniam, Gaanty Pragas, Memarzia, Arghavan, Mohanta, Bulu, Morales-Burgos, A.M., Nandi, Gouranga, Nassif, Asmae, Nayak, Amit Kumar, Necolau, Madalina, Neves, Ana R., Nikazar, Sohrab, Okoro, Emeka Emmanuel, Oni, Babalola Aisosa, Pal, Dilipkumar, Palanisamy, Karthick Murugan, Panda, Pritish Kumar, Pandele, Andreea Madalina, Pezeshkpour, Shaghayegh, Rahim, Mohd Hasbi Ab., Raikwar, Sarjana, Raj, Khushboo, Saadat, Saeideh, Sadiku, Rotimi Emmanuel, Saha, Supriyo, Sahu, Pooja, Sajini, Deepak Vasudevan, Samanta, Amalesh, Sanni, Samuel Eshorame, Sanyal, Rupa, Sarkar, Saurav, Shrivastav, Pranav S., Silva, Luciano Paulino, Taha, Douae, Thangavelu, Prabha, Usamo, Firehiwot Belayneh, Verma, Amit, Voicu, Stefan Ioan, Wiwanitkit, Viroj, and Yasri, Sora

Published
2023
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31. Naturally-Derived Biphasic Calcium Phosphates through Increased Phosphorus-Based Reagent Amounts for Biomedical Applications

Author

Mocanu, Aura-Cătălina, primary, Stan, George E., additional, Maidaniuc, Andreea, additional, Miculescu, Marian, additional, Antoniac, Iulian Vasile, additional, Ciocoiu, Robert-Cătălin, additional, Voicu, Ștefan Ioan, additional, Mitran, Valentina, additional, Cîmpean, Anișoara, additional, and Miculescu, Florin, additional

Published
2019
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32. Development of an In Vitro Airway Epithelial–Endothelial Cell Culture Model on a Flexible Porous Poly(Trimethylene Carbonate) Membrane Based on Calu-3 Airway Epithelial Cells and Lung Microvascular Endothelial Cells.

Author

Pasman, Thijs, Baptista, Danielle, van Riet, Sander, Truckenmüller, Roman K., Hiemstra, Pieter S., Rottier, Robbert J., Hamelmann, Naomi M., Paulusse, Jos M. J., Stamatialis, Dimitrios, Poot, André A., and Voicu, Ștefan Ioan

Subjects
ENDOTHELIAL cells, CELL culture, CARBONATES, EPITHELIAL cell culture, TIGHT junctions, CYCLOPROPANE, EPITHELIAL cells, BLOOD-brain barrier
Abstract

Due to the continuing high impact of lung diseases on society and the emergence of new respiratory viruses, such as SARS-CoV-2, there is a great need for in vitro lung models that more accurately recapitulate the in vivo situation than current models based on lung epithelial cell cultures on stiff membranes. Therefore, we developed an in vitro airway epithelial–endothelial cell culture model based on Calu-3 human lung epithelial cells and human lung microvascular endothelial cells (LMVECs), cultured on opposite sides of flexible porous poly(trimethylene carbonate) (PTMC) membranes. Calu-3 cells, cultured for two weeks at an air–liquid interface (ALI), showed good expression of the tight junction (TJ) protein Zonula Occludens 1 (ZO-1). LMVECs cultured submerged for three weeks were CD31-positive, but the expression was diffuse and not localized at the cell membrane. Barrier functions of the Calu-3 cell cultures and the co-cultures with LMVECs were good, as determined by electrical resistance measurements and fluorescein isothiocyanate-dextran (FITC-dextran) permeability assays. Importantly, the Calu-3/LMVEC co-cultures showed better cell viability and barrier function than mono-cultures. Moreover, there was no evidence for epithelial- and endothelial-to-mesenchymal transition (EMT and EndoMT, respectively) based on staining for the mesenchymal markers vimentin and α-SMA, respectively. These results indicate the potential of this new airway epithelial–endothelial model for lung research. In addition, since the PTMC membrane is flexible, the model can be expanded by introducing cyclic stretch for enabling mechanical stimulation of the cells. Furthermore, the model can form the basis for biomimetic airway epithelial–endothelial and alveolar–endothelial models with primary lung epithelial cells. [ABSTRACT FROM AUTHOR]

Published
2021
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50. Nanogels of Natural Polymers

Author

Pamfil, Daniela, Vasile, Cornelia, Kumar Thakur, Vijay, Series editor, Thakur, Vijay Kumar, editor, Thakur, Manju Kumari, editor, and Voicu, Stefan Ioan, editor

Published
2018
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