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Fahim AM, Dacrory S, Hashem AH, Kamel S. Antimicrobial, anticancer activities, molecular docking, and DFT/B3LYP/LANL2DZ analysis of heterocyclic cellulose derivative and their Cu-complexes. Int J Biol Macromol 2024; 269:132027. [PMID: 38702001 DOI: 10.1016/j.ijbiomac.2024.132027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 04/05/2024] [Accepted: 04/29/2024] [Indexed: 05/06/2024]
Abstract
In this study, novel Cu-complexes of heterocyclic cellulose which were synthesized via the reaction of carboxymethyl cellulose (CMC) from bagasse pulp with NH2NH2 to give hydrazide cellulose which easily reacted with CS2 to form salt and then cyclized in the presence of HCl to afford cellulose oxadiazole, or with hydrazine hydrate to give cellulose triazole. Furthermore, the cellulose oxadiazole and triazole moieties acting as chelating agents with metal ion Cu (II), and all synthesized compounds were examined for their spectral analysis to show the adsorption of Cu (II) on the surface of cellulose through intramolecular hydrogen bonding. Results illustrated that cellulose oxadiazole and Cu- cellulose oxadiazole exhibited antimicrobial activities more than triazole and Cu- cellulose triazole. Furthermore, anticancer results showed that both cellulose oxadiazole and triazole exhibited activity higher than Cu-cellulose oxadiazole and Cu-cellulose triazole, where the cellulose triazole showed the highest activity (IC50 = 58.7 μg/μL). Additionally, the docking simulation of the synthesized cellulose complexes with different proteins such as PDBID:3t88, PDBID:4ynt, PDBID:1tgh, PDBID:2wje, and PDBID:4hdq and shortage bond length to confirm the experimental results. Optimization of metal complexes utilized the DFT/B3LYP/LANL2DZ basis set to confirm the stability of these metals theoretically and their physical descriptors and FMO analysis.
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Affiliation(s)
- Asmaa M Fahim
- Department of Green Chemistry, National Research Centre, Dokki, P.O. Box.12622, Cairo, Egypt
| | - Sawsan Dacrory
- Cellulose and paper Department, National Research Centre, Giza 12622, Egypt
| | - Amr H Hashem
- Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo 11884, Egypt.
| | - Samir Kamel
- Cellulose and paper Department, National Research Centre, Giza 12622, Egypt
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Aldroubi S, Geneste A, Guiffrey P, El-Sakhawy M, Kamel S, Bou Malham I, Hesemann P, Mehdi A, Brun N. Ionothermal Carbonization of Sugarcane Bagasse in 1-Alkyl-3-methylimidazolium Ionic Liquids: Insights into the Role of the Chloroferrate Anion. J Phys Chem B 2024; 128:3485-3498. [PMID: 38549268 DOI: 10.1021/acs.jpcb.3c08457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
We report the ionothermal carbonization (ITC) of lignocellulosic biomass in imidazolium tetrachloroferrate ionic liquids (ILs) as an advantageous approach for the preparation of nanostructured carbonaceous materials, namely, ionochars. In a previous study, we investigated the role of the imidazolium cation and demonstrated the possibility of controlling both the textural and morphological properties of ionochars by cation engineering. Although essential for providing intermediate Lewis acidity and relatively high thermal stability, the role of the chloroferrate anion is still open to debate. Herein, we investigated the ITC of sugarcane bagasse and its main component, cellulose, in 1-alkyl-3-methylimidazolium ILs with different chloroferrate anions. We identified anionic speciation and its impact on the properties of the IL by Raman spectroscopy, thermogravimetric analysis, and differential scanning calorimetry. The obtained ionochars were characterized by gas physisorption, electron microscopy, Raman spectroscopy, Fourier transform infrared (FTIR) spectroscopy, and 13C solid-state CP-MAS NMR spectroscopy. We show that the anionic species have a predominant impact on the textural and morphological properties of the ionochars.
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Affiliation(s)
- Soha Aldroubi
- ICGM, Univ. Montpellier, CNRS, ENSCM, 34293 Montpellier, France
| | - Amine Geneste
- ICGM, Univ. Montpellier, CNRS, ENSCM, 34293 Montpellier, France
| | | | - Mohamed El-Sakhawy
- Cellulose and Paper Department, National Research Centre, 12622 Giza, Egypt
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, 12622 Giza, Egypt
| | | | - Peter Hesemann
- ICGM, Univ. Montpellier, CNRS, ENSCM, 34293 Montpellier, France
| | - Ahmad Mehdi
- ICGM, Univ. Montpellier, CNRS, ENSCM, 34293 Montpellier, France
| | - Nicolas Brun
- ICGM, Univ. Montpellier, CNRS, ENSCM, 34293 Montpellier, France
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Tohamy HAS, Elnasharty MMM, Abdel-Aziz MS, El-Sakhawy M, Turky G, Kamel S. Antibacterial activity and dielectric properties of the PVA/cellulose nanocrystal composite using the synergistic effect of rGO@CuNPs. Int J Biol Macromol 2024; 261:129801. [PMID: 38309410 DOI: 10.1016/j.ijbiomac.2024.129801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 01/24/2024] [Accepted: 01/25/2024] [Indexed: 02/05/2024]
Abstract
This work aims to enhance the performance of the polyvinyl alcohol (PVA) composite by using cellulose nanocrystal (CNC) as reinforcement and copper nanoparticles (CuNPs)/reduced graphene oxide (rGO) as conducting and antimicrobial reagents. Firstly, rGO was loaded onto CuNPs using an eco-friendly microwave method. Different techniques characterized the components and prepared composites, which indicated the incorporation of cellulose nanocrystals and rGO@CuNPs within the polyvinyl alcohol matrix. Utilizing the clear zone of inhibition, the antibacterial test was quantified. Compared to the neat composite, the rGO@CuNPs loaded polyvinyl alcohol/ cellulose nanocrystal composites exhibited no bacterial growth against S. aureus, E. coli, and C. albicans. However, all composites did not have antifungal activity against A. niger. The combination of conductivity and interfacial polarization is the reason for the abrupt increase of permittivity with decreasing frequency. Besides, adding rGO@CuNPs improved the electrical conductivity. DC-Conductivity increased about a decade after adding cellulose nanocrystal to polyvinyl alcohol, then another decade after adding CuONPs. The electric loss modulus representation shows a systematic shift in the peak position towards higher frequencies, decreasing the so-called conductivity relaxation time. This is the main reason for the enhancement of conductivity. The systematic attenuation of peaks' height with increasing conductivity is still unclear.
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Affiliation(s)
- Hebat-Allah S Tohamy
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth Str., PO 12622, Dokki, Giza, Egypt
| | | | - Mohamed S Abdel-Aziz
- Microbial Chemistry Department, National Research Centre, 33 El Bohouth st. (former El tahrir st.), P.O. 12622, Dokki, Giza, Egypt
| | - Mohamed El-Sakhawy
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth Str., PO 12622, Dokki, Giza, Egypt
| | - Gamal Turky
- Microwave Physics and Dielectrics Department, National Research Centre, 12622, Egypt.
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth Str., PO 12622, Dokki, Giza, Egypt
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Tohamy HAS, Mohamed SAA, El-Sakhawy M, Elsayed AM, Kamel S. Potential application of hydroxypropyl methylcellulose/shellac embedded with graphene oxide/TiO 2-Nps as natural packaging film. Int J Biol Macromol 2024; 257:128589. [PMID: 38052288 DOI: 10.1016/j.ijbiomac.2023.128589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/20/2023] [Accepted: 12/01/2023] [Indexed: 12/07/2023]
Abstract
Graphene oxide (GO), TiO2-NPs, HPMC, and shellac are environmentally green polymers and nanocomposites. This work aimed to create biodegradable composite films made of HPMC/shellac, HPMC/shellac-GO, and HPMC/shellac-GO/TiO2-NPs by film casting. TiO2-HPMC/shellac-GO matrix's dispersibility and mixing ability were characterized and observed using FTIR and XRD. XRD analysis shows that the crystallinity decreased within the composites due to breaking H-bonding. Compared to HPMC/shellac, TGA/DTG demonstrated the composite films' superior thermal stability. TiO2 (0.08-0.16 %) was cast into a composite film comprising HPMC, shellac, and GO. The homogeneity of TiO2 distribution in the composite film was shown using a SEM, which was also used to display the morphology of nanocomposite films. Nanocomposite films' thickness, air permeability, tensile strength, Young's modulus, and burst strength were examined. The results demonstrated that natural films prepared by a combination of shellac/GO with HPMC enhanced the fabricating of films' properties, the tensile strength increased by 231 % (from 16 to 53 MPa) in HPMC and HPSG2 (HPMC 1.9 g/shellac 0.25 g/GO 0.125 g in 100 mL) respectively, whereas the contact angle did not change. And after addition of TiO2-NPs, there were high enhancements in HPMC films' properties, such tensile strength increased by 212 % (from 16 to 50 MPa), burst strength increased by 20.96 % (3.1 to 3.75 Kg/cm2), and the contact angle by 60.86 % (48 to 74°) in HPMC and HPSGT2 respectively. Compared to HPMC films, films exhibited the highest levels of antibacterial activity against E. coli, B. mycoides, and C. albicans. So, the composite films from HPMC/shellac/GO/TiO2-NPs are promising potential packaging materials.
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Affiliation(s)
- Hebat-Allah S Tohamy
- Cellulose and Paper Department, National Research Centre, Dokki, Giza P.O. 12622, Egypt
| | - Salah A A Mohamed
- Packing and Packaging Materials Department, National Research Centre, 33 El Bohouth St., Dokki, Giza P.O. 12622, Egypt.
| | - Mohamed El-Sakhawy
- Cellulose and Paper Department, National Research Centre, Dokki, Giza P.O. 12622, Egypt
| | - Alshaimaa M Elsayed
- Molecular Biology Department, Biotechnology Research Institute, National Research Centre, Dokki, Giza 12622, Egypt
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, Dokki, Giza P.O. 12622, Egypt
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Strachota B, Strachota A, Vratović L, Pavlova E, Šlouf M, Kamel S, Cimrová V. Exceptionally Fast Temperature-Responsive, Mechanically Strong and Extensible Monolithic Non-Porous Hydrogels: Poly( N-isopropylacrylamide) Intercalated with Hydroxypropyl Methylcellulose. Gels 2023; 9:926. [PMID: 38131912 PMCID: PMC10742870 DOI: 10.3390/gels9120926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 11/18/2023] [Accepted: 11/22/2023] [Indexed: 12/23/2023] Open
Abstract
Exceptionally fast temperature-responsive, mechanically strong, tough and extensible monolithic non-porous hydrogels were synthesized. They are based on divinyl-crosslinked poly(N-isopropyl-acrylamide) (PNIPAm) intercalated by hydroxypropyl methylcellulose (HPMC). HPMC was largely extracted after polymerization, thus yielding a 'template-modified' PNIPAm network intercalated with a modest residue of HPMC. High contents of divinyl crosslinker and of HPMC caused a varying degree of micro-phase-separation in some products, but without detriment to mechanical or tensile properties. After extraction of non-fixed HPMC, the micro-phase-separated products combine superior mechanical properties with ultra-fast T-response (in 30 s). Their PNIPAm network was highly regular and extensible (intercalation effect), toughened by hydrogen bonds to HPMC, and interpenetrated by a network of nano-channels (left behind by extracted HPMC), which ensured the water transport rates needed for ultra-fast deswelling. Moreover, the T-response rate could be widely tuned by the degree of heterogeneity during synthesis. The fastest-responsive among our hydrogels could be of practical interest as soft actuators with very good mechanical properties (soft robotics), while the slower ones offer applications in drug delivery systems (as tested on the example of Theophylline), or in related biomedical engineering applications.
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Affiliation(s)
- Beata Strachota
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovskeho nam. 2, 162 00 Praha, Czech Republic; (B.S.); (L.V.); (E.P.); (M.Š.); (V.C.)
| | - Adam Strachota
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovskeho nam. 2, 162 00 Praha, Czech Republic; (B.S.); (L.V.); (E.P.); (M.Š.); (V.C.)
| | - Leana Vratović
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovskeho nam. 2, 162 00 Praha, Czech Republic; (B.S.); (L.V.); (E.P.); (M.Š.); (V.C.)
| | - Ewa Pavlova
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovskeho nam. 2, 162 00 Praha, Czech Republic; (B.S.); (L.V.); (E.P.); (M.Š.); (V.C.)
| | - Miroslav Šlouf
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovskeho nam. 2, 162 00 Praha, Czech Republic; (B.S.); (L.V.); (E.P.); (M.Š.); (V.C.)
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, 33, El-Bohouth Str., Dokki, Giza 12622, Egypt;
| | - Věra Cimrová
- Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovskeho nam. 2, 162 00 Praha, Czech Republic; (B.S.); (L.V.); (E.P.); (M.Š.); (V.C.)
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Tohamy HAS, El-Sakhawy M, Hassan EB, Kamel S. Microwave-Prepared Quantum Dots and Their Potential Applications as Adsorbents and Chemosensors. Materials (Basel) 2023; 16:6722. [PMID: 37895704 PMCID: PMC10608352 DOI: 10.3390/ma16206722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 10/09/2023] [Accepted: 10/10/2023] [Indexed: 10/29/2023]
Abstract
A combination of different eco-friendly materials prepared promising fluorescent quantum dots (QDs) through the one-step process using the microwave heating of urea with cellulose, chitosan, and biochar. Characterizations of the prepared QDs, including the investigation of their structure by infrared spectroscopy, Raman analysis, X-ray diffraction, thermal gravimetric analysis, morphology, and optical properties, were performed. The results showed that QDs possess a small size, high UV absorption, and excitation wavelength-dependent fluorescence. The prepared QDs were also tested for metal ions removal from aqueous solutions. The adsorption at different contact times was investigated to optimize the adsorption efficiency of the prepared QDs. All QDs were found to be an ideal sorbent for Cr(II), Cu(II), Mn(II), and Pb(II). From the data, Cr(II) was more highly adsorbed than other metal ions. The results of the kinetic investigation showed that the pseudo-second-order kinetic model fit the adsorption process effectively. In addition, the fluorescence spectra of QDs were changed after the adsorption of metal ions; hence, the prepared QDs could be utilized in environmental sectors such as wastewater pollution detection, adsorption, and chemical sensing applications.
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Affiliation(s)
- Hebat-Allah S. Tohamy
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth Str., Dokki, Giza 12622, Egypt; (H.-A.S.T.); (M.E.-S.)
| | - Mohamed El-Sakhawy
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth Str., Dokki, Giza 12622, Egypt; (H.-A.S.T.); (M.E.-S.)
| | - El Barbary Hassan
- Department of Sustainable Bioproducts, Mississippi State University, P.O. Box 9820, Mississippi State, MS 39762, USA
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth Str., Dokki, Giza 12622, Egypt; (H.-A.S.T.); (M.E.-S.)
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Khalil AM, Hashem AH, Kamel S. Bimetallic hydrogels based on chitosan and carrageenan as promising materials for biological applications. Biotechnol J 2023; 18:e2300093. [PMID: 37291073 DOI: 10.1002/biot.202300093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 06/02/2023] [Indexed: 06/10/2023]
Abstract
In this study, novel crosslinked hydrogels based on chitosan (CS) and carrageenan (CRG) loaded with silver and/or copper nanoparticles (Ag/CuNPs) were prepared through a freeze-drying (thawing) process to be applied in biological applications comprising wound dressing. These hydrogels showed porous interconnected structures. The influence of the used nanoparticles (NPs) on the antibacterial properties of the CS/CRG hydrogels was explored. Antimicrobial results revealed that both CS/CRG/CuNPs, CS/CRG/AgNPs, and CS/CRG/Ag-CuNPs exhibited promising antibacterial and antifungal activity against Escherichia coli, Pseudomonas aeruginosa, Streptococcus mutans, Staphylococcus aureus, Bacillus subtilis, and Candida albicans. Moreover, CS/CRG/AgNPs, CS/CRG/CuNPs, and CS/CRG/Ag-CuNPs hydrogels showed potential antioxidant activity to be 57%, 78%, and 89%, respectively. Furthermore, cytotoxicity results against Vero normal cell line confirmed that all designed hydrogels are safe upon usage. The bimetallic CS/CRG hydrogels showed notably enhanced antibacterial properties among the as-prepared hydrogels allowing them to be a successful material upon being employed in wound dressing applications.
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Affiliation(s)
- Ahmed M Khalil
- Photochemistry Department, National Research Centre, Giza, Dokki, Egypt
| | - Amr H Hashem
- Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo, Egypt
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, Cairo, Egypt
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El-Sayed ESA, Dacrory S, Essawy HA, Ibrahim HS, Ammar NS, Kamel S. Sustainable grafted chitosan-dialdehyde cellulose with high adsorption capacity of heavy metal. BMC Chem 2023; 17:117. [PMID: 37730653 PMCID: PMC10510298 DOI: 10.1186/s13065-023-01035-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 09/07/2023] [Indexed: 09/22/2023] Open
Abstract
A novel adsorbent was prepared using a backbone comprising chemically hybridized dialdehyde cellulose (DAC) with chitosan via Schiff base reaction, followed by graft copolymerization of acrylic acid. Fourier transform infrared spectroscopy (FTIR) confirmed the hybridization while scanning electron microscopy (SEM) revealed intensive covering of chitosan onto the surface of DAC. At the same time, energy dispersive X-ray (EDX) proved the emergence of nitrogen derived from chitosan. The X-ray diffraction (XRD) indicated that the crystallinity of the backbone and graft copolymer structures was neither affected post the hybridization nor the grafting polymerization. The adsorbent showed high swelling capacity (872%) and highly efficient removal and selectivity of Ni2+ in the presence of other disturbing ions such as Pb2+ or Cu2+. The kinetic study found that the second-order kinetic model could better describe the adsorption process of (Cu2+, Ni2+) on the graft copolymer. In contrast, the first-order kinetic model prevails for the binary mixture (Pb2+, Ni2+). Moreover, the correlation coefficient values for the adsorption process of these binary elements using Langmuir and Freundlich isotherms confirmed that the developed grafted DAC/chitosan exhibits a good fit with both isotherm models, which indicates its broadened and complicated structure. Furthermore, the grafted DAC/chitosan exhibited high efficient regeneration and high adsorption capacity for Pb2+, Cu2+ and Ni2+.
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Affiliation(s)
- Essam S Abd El-Sayed
- Cellulose and Paper Department, National Research Centre, Dokki, 12622, Cairo, Egypt
| | - Sawsan Dacrory
- Cellulose and Paper Department, National Research Centre, Dokki, 12622, Cairo, Egypt
| | - Hisham A Essawy
- Department of Polymers and Pigments, National Research Centre, Dokki, 12622, Cairo, Egypt
| | - Hanan S Ibrahim
- Department of Water Pollution, National Research Centre, Dokki, 12622, Cairo, Egypt
| | - Nabila S Ammar
- Department of Water Pollution, National Research Centre, Dokki, 12622, Cairo, Egypt
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, Dokki, 12622, Cairo, Egypt.
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Abdel-Fatah AS, Tohamy HAS, Ahmed SI, Youssef MA, Mabrouk MR, Kamel S, Samhan FA, El-Gendi A. Anatase-cellulose acetate for reinforced desalination membrane with antibacterial properties. BMC Chem 2023; 17:112. [PMID: 37700386 PMCID: PMC10496367 DOI: 10.1186/s13065-023-01013-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 08/01/2023] [Indexed: 09/14/2023] Open
Abstract
This study aimed to prepare antifouling and highly mechanical strengthening membranes for brackish and underground water desalination. It was designed from cellulose acetate (CA) loaded anatase. Anatase was prepared from tetra-iso-propylorthotitanate and carboxymethyl cellulose. Different concentrations of anatase (0.2, 0.3, 0.5, 0.6, 0.7, and 0.8)% were loaded onto CA during the inversion phase preparation of the membranes. The prepared membranes were characterized using Fourier Transform Infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM & EDX), mechanical properties, swelling ratio, porosity determination, and ion release. The analysis confirmed the formation of anatase on the surface and inside the macro-voids of the membrane. Furthermore, anatase loading improved the CA membrane's mechanical properties and decreased its swelling and porosity rate. Also, CA-loaded anatase membranes displayed a significant antibacterial potential against Gram-positive and Gram-negative bacteria. The results showed that the salt rejection of the CA/anatase films as-prepared varies considerably with the addition of nanomaterial, rising from 46%:92% with the prepared membranes under the 10-bar operation condition and 5 g/L NaCl input concentration. It can be concluded that the prepared CA-loaded anatase membranes have high mechanical properties that are safe, economical, available, and can stop membrane biofouling.
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Affiliation(s)
- Ahmed S Abdel-Fatah
- Water Quality Audit Department, Egyptian Water and Wastewater Regulatory Agency, New Cairo City, Egypt
| | | | - Sayed I Ahmed
- Faculty of Engineering, Public Works Dept., Ain Shams University, Abbasseya, Cairo, 11535, Egypt
| | - Mohamed A Youssef
- Department of Chemistry, Faculty of Science, Helwan University, Cairo, Egypt
| | - Mohamed R Mabrouk
- Department of Chemistry, Faculty of Science, Helwan University, Cairo, Egypt
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, Cairo, 12622, Egypt
| | - Farag A Samhan
- Environmental and Climate Change Research Institute, National Research Centre, Cairo, 12622, Egypt.
| | - Ayman El-Gendi
- Chemical Engineering and Pilot Plant Department, Engineering Research and Renewable Energy Institute, National Research Centre, Cairo, 12622, Egypt
- Canal High Institute of Engineering and Technology, Ministry of High Education, Suez, Egypt
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El-Sayed NS, Hashem AH, Khattab TA, Kamel S. New antibacterial hydrogels based on sodium alginate. Int J Biol Macromol 2023; 248:125872. [PMID: 37482158 DOI: 10.1016/j.ijbiomac.2023.125872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 07/12/2023] [Accepted: 07/15/2023] [Indexed: 07/25/2023]
Abstract
Nowadays, the combined knowledge and experience in biomedical research and material sciences results in the innovation of smart materials that could efficiently overcome the problems of microbial contaminations. Herein, a new drug delivery platform prepared by grafting sodium alginate with β-carboxyethyl acrylate and acrylamide was described and characterized. 9-Aminoacridine (9-AA), and kanamycin sulfate (KS) were separately loaded into the hydrogel in situ during graft polymerization. The grafting efficiency for the resulting hydrogels was 70.01-78.08 %. The chemical structure of the hydrogels, thermogravimetric analysis, and morphological features were investigated. The swelling study revealed that the hydrogel without drugs achieved a superior swelling rate compared to drug-loaded hydrogels. The hydrogel tuned the drug-release rate in a pH-dependent manner. Furthermore, the antibacterial study suggested that the hydrogels encapsulating 9-AA (88.6 %) or KS (89.3 %) exhibited comparable antibacterial activity against Gram-positive and Gram-negative bacterial strains. Finally, the cytocompatibility study conducted on normal lung cell line (Vero cells) demonstrated neglectable to tolerable toxicity for the drug-loaded hydrogel. More interestingly, the cell viability for the blank hydrogel was 92.5 %, implying its suitability for biomedical applications.
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Affiliation(s)
| | - Amr H Hashem
- Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo 11884, Egypt
| | - Tawfik A Khattab
- Dyeing, Printing and Auxiliaries Department, National Research Centre, Cairo, P.O. 12622, Egypt
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, Cairo, P.O. 12622, Egypt
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Qiu Y, Fan M, Wang Y, Hu X, Chen J, Kamel S, Yang Y, Yang X, Liu H, Zhu Y, Wang Q. Sulfate-reducing bacteria loaded in hydrogel as a long-lasting H 2S factory for tumor therapy. J Control Release 2023; 360:647-659. [PMID: 37406817 DOI: 10.1016/j.jconrel.2023.06.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 06/20/2023] [Accepted: 06/22/2023] [Indexed: 07/07/2023]
Abstract
The continuous supply of hydrogen sulfide (H2S) gas at high concentrations to tumors is considered a promising and safe strategy for tumor therapy. However, the absence of a durable and cost-effective H2S-producing donor hampers its extensive application. Sulfate-reducing bacteria (SRB) can serve as an excellent H2S factory due to their ability to metabolize sulfate into H2S. Herein, a novel injectable chondroitin sulfate (ChS) hydrogel loaded with SRB (SRB@ChS Gel) is proposed to sustainably produce H2S in tumor tissues to overcome the limitations of current H2S gas therapy. In vitro, the ChS Gel not only supports the growth of encapsulated SRB, but also supplies a sulfate source to the SRB to produce high concentrations of H2S for at least 7 days, resulting in mitochondrial damage and immunogenic cell death. Once injected into tumor tissue, the SRB@ChS Gel can constantly produce H2S for >5 days, significantly inhibiting tumor growth. Furthermore, such treatment activates systemic anti-tumor immune responses, suppresses the growth of distant and recurrent tumors, as well as lung metastases, meanwhile with negligible side effects. Therefore, the injectable SRB@ChS Gel, as a safe and long-term, self-sustained H2S-generating factory, provides a promising strategy for anti-tumor therapy.
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Affiliation(s)
- Yuzhi Qiu
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Man Fan
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yiqian Wang
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xiuwen Hu
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Jiawen Chen
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, Dokki, Cairo 12622, Egypt
| | - Yajiang Yang
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xiangliang Yang
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; National Engineering Research Center for Nanomedicine, Wuhan 430074, China
| | - Hongfang Liu
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yanhong Zhu
- College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; National Engineering Research Center for Nanomedicine, Wuhan 430074, China.
| | - Qin Wang
- Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; National Engineering Research Center for Nanomedicine, Wuhan 430074, China.
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Tohamy HAS, El-Sakhawy M, Kamel S. Microwave-assisted synthesis of amphoteric fluorescence carbon quantum dots and their chromium adsorption from aqueous solution. Sci Rep 2023; 13:11306. [PMID: 37438440 DOI: 10.1038/s41598-023-37894-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Accepted: 06/29/2023] [Indexed: 07/14/2023] Open
Abstract
The chromium adsorption behavior from aqueous solution by the amphoteric Janus nitrogen-doped carbon quantum dots (AJ-N-CQDs) was investigated. The pseudo-first-order and the second-order adsorption kinetics models were employed to analyze the experimental data; the second-order adsorption kinetics model presented a better correlation to the experimental data, suggesting a chemisorptions process. The values obtained in the pseudo-first-order are still suitable for describing the Kinetics of Cr(VI) sorption. These values elucidate the surface processes involving chemisorption and physisorption in the adsorption of Cr(VI) by AJ-N-CQDs. The R2 of the Boyd model gave a better fit to the adsorption data of AJ-N-CQDs (i.e., external diffusion), which means the surface processes involving external Cr(VI) adsorption by AJ-N-CQDs. The higher value of α may be due to the greater surface area of the AJ-N-CQDs for the immediate adsorption of Cr(VI) from the aqueous solution. AJ-N-CQDs have fluorescence spectra before and after Cr(VI) adsorption, indicating they are promising for chemical sensor applications.
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Affiliation(s)
- Hebat-Allah S Tohamy
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth Str., P.O. 12622, Dokki, Giza, Egypt
| | - Mohamed El-Sakhawy
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth Str., P.O. 12622, Dokki, Giza, Egypt.
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth Str., P.O. 12622, Dokki, Giza, Egypt
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Hasanin M, Abdel Kader AH, Abd El‐Sayed ES, Kamel S. Green Chitosan‐Flaxseed Gum Film Loaded with ZnO for Packaging Applications. STARCH-STARKE 2023; 75. [DOI: 10.1002/star.202200132] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Indexed: 09/02/2023]
Abstract
AbstractThe possibility of manufacturing edible packaging materials with tailored properties and low cost has attracted much interest. This work presents a new material for edible packaging made from flaxseed gum (FSG) and chitosan (Ch) loaded with zinc oxide nanoparticles (ZnO‐NPs). ZnO‐NPs are synthesized in situ during the preparation of the edible film. The Ch/FSG/ZnO‐NPs films are prepared by casting Ch in different ratios of FSG (12.5%, 25%, 37.5%, and 50%). The resulting films are evaluated for their physicochemical, mechanical, and barrier properties to determine their suitability for coating or packaging food or bioproducts. By studying the antimicrobial activities of the ZnO‐NPs loaded films, we can see that ZnO‐NP's concentration highly affects these activities. In addition, the FSG improves mechanical properties. Films developed by incorporating ZnO‐NPs are proposed to be appropriate for low‐moisture food and pharmaceutical products, which can reduce environmental problems associated with synthetic packaging. Consequently, Ch/FSG composite films have the potential to replace conventional packaging.
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Affiliation(s)
- Mohamed Hasanin
- Cellulose and Paper Department National Research Centre Cairo 12622 Egypt
| | | | | | - Samir Kamel
- Cellulose and Paper Department National Research Centre Cairo 12622 Egypt
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14
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Kamel S, Dacrory S, Hesemann P, Bettache N, Ali LMA, Postel L, Akl EM, El-Sakhawy M. Wound Dressings Based on Sodium Alginate-Polyvinyl Alcohol- Moringa oleifera Extracts. Pharmaceutics 2023; 15:pharmaceutics15041270. [PMID: 37111755 PMCID: PMC10142115 DOI: 10.3390/pharmaceutics15041270] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 04/12/2023] [Accepted: 04/14/2023] [Indexed: 04/29/2023] Open
Abstract
Biopolymers have significant pharmaceutical applications, and their blending has favorable characteristics for their pharmaceutical properties compared to the sole components. In this work, sodium alginate (SA) as a marine biopolymer was blended with poly(vinyl) alcohol (PVA) to form SA/PVA scaffolds through the freeze-thawing technique. Additionally, polyphenolic compounds in Moringa oleifera leaves were extracted by different solvents, and it was found that extracts with 80% methanol had the highest antioxidant activity. Different concentrations (0.0-2.5%) of this extract were successfully immobilized in SA/PVA scaffolds during preparation. The characterization of the scaffolds was carried out via FT-IR, XRD, TG, and SEM. The pure and Moringa oleifera extract immobilized SA/PVA scaffolds (MOE/SA/PVA) showed high biocompatibility with human fibroblasts. Further, they showed excellent in vitro and in vivo wound healing capacity, with the best effect noted for the scaffold with high extract content (2.5%).
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Affiliation(s)
- Samir Kamel
- Cellulose & Paper Department, National Research Centre, 33 El Bohouth St., Dokki, Giza 12622, Egypt
| | - Sawsan Dacrory
- Cellulose & Paper Department, National Research Centre, 33 El Bohouth St., Dokki, Giza 12622, Egypt
| | - Peter Hesemann
- ICGM, Université Montpellier, CNRS, ENSCM, CEDEX 05, 34095 Montpellier, France
| | - Nadir Bettache
- IBMM, Université Montpellier, CNRS, ENSCM, 34093 Montpellier, France
| | - Lamiaa M A Ali
- IBMM, Université Montpellier, CNRS, ENSCM, 34093 Montpellier, France
- Department of Biochemistry, Medical Research Institute, Alexandria University, Alexandria 21561, Egypt
| | - Lou Postel
- IBMM, Université Montpellier, CNRS, ENSCM, 34093 Montpellier, France
| | - Engy M Akl
- Fats and Oils Department, Food Industry and Nutrition, National Research Centre, 33 El Bohouth St., Dokki, Giza 12622, Egypt
| | - Mohamed El-Sakhawy
- Cellulose & Paper Department, National Research Centre, 33 El Bohouth St., Dokki, Giza 12622, Egypt
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15
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Tohamy HAS, El-Sakhawy M, Strachota B, Strachota A, Pavlova E, Mares Barbosa S, Kamel S. Temperature- and pH-Responsive Super-Absorbent Hydrogel Based on Grafted Cellulose and Capable of Heavy Metal Removal from Aqueous Solutions. Gels 2023; 9:gels9040296. [PMID: 37102908 PMCID: PMC10138026 DOI: 10.3390/gels9040296] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/24/2023] [Accepted: 03/31/2023] [Indexed: 04/05/2023] Open
Abstract
In this work, we prepared highly swelling, stimuli-responsive hydrogels capable of the highly efficient adsorption of inorganic pollutants. The hydrogels were based on hydroxypropyl methyl cellulose (HPMC) grafted with acrylamide (AM) and 3-sulfopropyl acrylate (SPA) and were synthesized via the growth (radical polymerization) of the grafted copolymer chains on HPMC, which was activated by radical oxidation. These grafted structures were crosslinked to an infinite network by a small amount of di-vinyl comonomer. HPMC was chosen as a cheap hydrophilic and naturally sourced polymer backbone, while AM and SPA were employed to preferentially bond coordinating and cationic inorganic pollutants, respectively. All the gels displayed a pronounced elastic character, as well as considerably high values of stress at break (several hundred %). The gel with the highest fraction of the ionic comonomer SPA (with an AM/SPA ratio = 0.5) displayed the highest equilibrium swelling ratio (12,100%), the highest volume response to temperature and pH, and the fastest swelling kinetics, but also the lowest modulus. The other gels (with AM/SPA = 1 and 2) displayed several times higher moduli but more modest pH responses and only very modest temperature sensitivity. Cr(VI) adsorption tests indicated that the prepared hydrogels removed this species from water very efficiently: between 90 and 96% in one step. The hydrogels with AM/SPA ratios of 0.5 and 1 appeared to be promising regenerable (via pH) materials for repeated Cr(VI) adsorption.
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Affiliation(s)
- Hebat-Allah S. Tohamy
- Cellulose & Paper Department, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt
| | - Mohamed El-Sakhawy
- Cellulose & Paper Department, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt
| | - Beata Strachota
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 00 Praha, Czech Republic
| | - Adam Strachota
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 00 Praha, Czech Republic
| | - Ewa Pavlova
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 00 Praha, Czech Republic
| | - Silvia Mares Barbosa
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Heyrovského nám. 2, 162 00 Praha, Czech Republic
| | - Samir Kamel
- Cellulose & Paper Department, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt
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Al Kiey SA, Khalil AM, Kamel S. Insight into TEMPO-oxidized cellulose-based composites as electrochemical sensors for dopamine assessment. Int J Biol Macromol 2023; 239:124302. [PMID: 37011750 DOI: 10.1016/j.ijbiomac.2023.124302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/10/2023] [Accepted: 03/29/2023] [Indexed: 04/04/2023]
Abstract
The diagnosis and treatment of many neurological and psychiatric problems depend on establishing simple, inexpensive, and comfortable electrochemical sensors for dopamine (DA) detection. Herein, 2,2,6,6 tetramethylpiperidine-1-oxyl (TEMPO)-oxidized cellulose nanofibers (TOC) were successfully loaded with silver nanoparticles (AgNPs) and/or graphite (Gr) and crosslinked by tannic acid, producing composites. This study describes a suitable casting procedure for the composite synthesis of TOC/AgNPs and/or Gr for the electrochemical detection of dopamine. Electrochemical impedance spectra (EIS), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM) were employed to characterize the TOC/AgNPs/Gr composites. In addition, the direct electrochemistry of electrodes treated with the prepared composites was examined using cyclic voltammetry. The TOC/AgNPs/Gr composite-modified electrode improved electrochemical performance towards detecting dopamine compared to TOC/Gr-modified electrodes. Upon employing amperometric measurement, our electrochemical instrument has a wide linear range (0.005-250 μM), a low limit of detection (0.0005 μM) at S/N = 3, and a high sensitivity (0.963 μA μM-1 cm-2). Additionally, it was demonstrated that DA detection seemed to have outstanding anti-interference characteristics. The proposed electrochemical sensors meet the clinical criteria regarding reproducibility, selectivity, stability, and recovery. The straightforward electrochemical method utilized in this paper may provide a potential framework for creating dopamine quantification biosensors.
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Darwish A, El-Sayed NS, Al Kiey SA, Kamel S, Turky G. Polyanionic electrically conductive superabsorbent hydrogel based on sodium alginate-g-poly (AM-co-ECA-co-AMPS): Broadband dielectric spectroscopy investigations. Int J Biol Macromol 2023; 232:123443. [PMID: 36709806 DOI: 10.1016/j.ijbiomac.2023.123443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 01/09/2023] [Accepted: 01/24/2023] [Indexed: 01/27/2023]
Abstract
In this study, the dielectric behavior of polyanionic electrically conductive superabsorbent hydrogel based on sodium alginate-g-poly(AM-co-ECA-co-AMPS) was investigated by broadband dielectric spectroscopy (BDS). The dielectric spectra obtained from -70 to 70 °C showed a superposition of three distinctive processes, electrode polarization, charge carrier's transport, and a molecular relaxation process. These dynamic processes were further analyzed along with the effect of both temperature and reduced graphene oxide (rGO) content. The development of a clear electrochemical double layer (ECDL) at the electrode/hydrogel interface strongly supports its possible application in supercapacitors' forms of energy storage. TGA, DSC, rheology, and electrochemical properties were studied. Furthermore, when the composite hydrogel with rGO content of 2.5 % was assembled into a symmetric supercapacitor, it displayed a specific capacitance of 756 F.g-1 at 1 A.g-1 and 704 F.g-1 after 5000 cycles with high capacitance retention of 93.2 %. The superior conductivity and porous structure of the rGO composite hydrogel are credited with the hydrogel's excellent electrochemical capabilities.
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Affiliation(s)
- Abdelfattah Darwish
- Microwave Physics and Dielectrics Department, National Research Centre, 12622, Egypt.
| | | | - Sherief A Al Kiey
- Physical Chemistry Department, National Research Centre, 12622, Egypt
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, 12622, Egypt
| | - Gamal Turky
- Microwave Physics and Dielectrics Department, National Research Centre, 12622, Egypt.
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CANDELLIER A, Bohbot Y, Pasquet A, Diouf M, Vermes E, Goffin E, Gun M, Peugnet F, Hénaut L, Rusinaru D, Mentaverri R, Kamel S, Choukroun G, Vanoverschelde J, Tribouilloy C. WCN23-0900 CHRONIC KIDNEY DISEASE IS A KEY RISK FACTOR FOR AORTIC STENOSIS PROGRESSION. Kidney Int Rep 2023. [DOI: 10.1016/j.ekir.2023.02.351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2023] Open
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19
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Tohamy HS, El‑Sakhawy M, Kamel S. Eco-friendly Synthesis of Carbon Quantum Dots as an Effective Adsorbent. J Fluoresc 2023; 33:423-435. [PMID: 36435905 PMCID: PMC9957867 DOI: 10.1007/s10895-022-03085-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Accepted: 11/09/2022] [Indexed: 11/27/2022]
Abstract
Fluorescent carbon quantum dots (CQDs) were prepared by an economical, green, and single-step procedure with the assistance of microwave heating of urea with bagasse (SCB), cellulose (C), or carboxymethyl cellulose (CMC). The prepared CQDs were characterized using a series of spectroscopic techniques, and they had petite size, intense absorption in the UV, and excitation wavelength-dependent fluorescence. The prepared CQDs were used for Pb(II) adsorption from an aqueous solution. The removal efficiency percentages (R %) were 99.16, 96.36, and 98.48% for QCMC, QC, and QSCB, respectively. The findings validated the efficiency of CQDs synthesized from CMC, cellulose, and SCB as excellent materials for further utilization in the environmental fields of wastewater pollution detection, adsorption, and chemical sensing applications. The kinetics and isotherms studied found that all CQDs isotherms fit well with the Langmuir model than Freundlich and Temkin models. According to R2, the pseudo-second-order fits the adsorption of QCMC, while the first-order one fits with QC and QSCB.
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Affiliation(s)
| | - Mohamed El‑Sakhawy
- Cellulose and Paper Department, National Research Centre, Cairo, 12622 Egypt
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, Cairo, 12622 Egypt
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20
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El Nahrawy AM, Ali AI, Mansour A, Abou Hammad AB, Hemdan BA, Kamel S. Talented Bi0.5Na0.25K0.25TiO3/oxidized cellulose films for optoelectronic and bioburden of pathogenic microbes. Carbohydr Polym 2022; 291:119656. [DOI: 10.1016/j.carbpol.2022.119656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 05/10/2022] [Accepted: 05/22/2022] [Indexed: 11/26/2022]
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21
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Baseer RA, Dacrory S, El Gendy MAM, Ewies EF, Kamel S. A biodegradable film based on cellulose and thiazolidine bearing UV shielding property. Sci Rep 2022; 12:7887. [PMID: 35550531 PMCID: PMC9098501 DOI: 10.1038/s41598-022-11457-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 04/21/2022] [Indexed: 11/09/2022] Open
Abstract
The current rationale is exploring new eco-friendly UV- shielding films based on cellulose and thiazolidine. Cellulose was oxidized to dialdehyde cellulose (DAC) and tricarboxy cellulose (TCC) by periodate and TEMPO/periodate/hypochlorite, respectively. While E-3-amino-5-(phenyldiazenyl)-2-thioxothiazolidin-4-one (TH) was synthesized by coupling diazonium salt with the 5-methylene of 2-thioxo-4-thiazolidinone. DAC was then coupled with TH via Schiff base reaction and incorporated onto TCC with different ratios to get UV-shielding films. 1HNMR, infrared spectroscopy (FTIR), and thermal gravimetric analysis (TGA) were used to investigate the chemical structure of the synthesized materials. In addition, the films' morphology, thermal, mechanical, and UV-shielding properties were investigated. The UV-shielding studies revealed that the film with 10% DAC-TH has 99.88, 99.99, and 96.19% UV-blocking (UVB), UV-absorbance (UVA), and Ultra-violet protection (UPF), respectively. Moreover, the prepared films demonstrated promising antimicrobial activity against Escherichia coli, S. aureus, P. aeruginosa, and Candida albicans. Finally, the prepared films showed no cytotoxic effects on normal human skin fibroblast's HFB-4 cell line.
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Affiliation(s)
- Rasha A Baseer
- Department of Polymers and Pigments technology, Chemical Industries Research Institute, National Research Centre, 33ElBohouth St., (Former El Tahrir), Dokki, 12622, Giza, Egypt.
| | - Sawsan Dacrory
- Cellulose and Paper Department, Chemical Industries Research Institute, National Research Centre, Cairo, 12622, Egypt.
| | - Mohamed A M El Gendy
- Drug Bioassay-Cell Culture Laboratory, Pharmacognosy Department, Pharmaceutical and Drug Industries Research Institute, National Research Centre, 33 ElBohouth St., (Former El Tahrir), Dokki, P.O. 12622, Giza, Egypt
| | - Ewies F Ewies
- Organometallic and Organometalloid Chemistry Department, Chemical Industries Research Institute, National Research Centre, 33 ElBohouth St., (Former El Tahrir), Dokki, P.O. 12622, Giza, Egypt
| | - Samir Kamel
- Cellulose and Paper Department, Chemical Industries Research Institute, National Research Centre, Cairo, 12622, Egypt
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Tohamy HAS, El-Sakhawy M, Kamel S. Development of graphene oxide-based styrene/acrylic elastomeric disks from sugarcane bagasse as adsorbents of Nickel (II) ions. J Polym Res 2022. [DOI: 10.1007/s10965-021-02830-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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El-Sayed NS, Hashem AH, Kamel S. Preparation and characterization of Gum Arabic Schiff's bases based on 9-aminoacridine with in vitro evaluation of their antimicrobial and antitumor potentiality. Carbohydr Polym 2022; 277:118823. [PMID: 34893240 DOI: 10.1016/j.carbpol.2021.118823] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/12/2021] [Accepted: 10/25/2021] [Indexed: 01/24/2023]
Abstract
The conjugation between drug and biopolymers through an easily hydrolysable bond such as ester linkage, disulfide linkage, or imine-bond have been extensively employed to control the drug release pattern and improve its bioavailability. This work described the conjugation of 9-aminoacridine (9-AA) to Gum Arabic (GA) via Schiff's base, as a pH-responsive bond. First, GA was oxidized to Arabic Gum dialdehyde (AGDA), then a different amount of 9-AA (10, 25, and 50 mg 9-AA) was coupled to defined amount of AGDA, the coupling was confirmed by elemental analysis and different spectroscopic tools. In addition, the physical features of Schiff's base conjugates including surface morphology, thermal stability, and crystalline structure were examined. The thermogravimetric analysis revealed that the incorporation of 9-AA slightly improved the thermal stability. The coupling of 9-AA to AGDA dramatically enhanced its in vitro antimicrobial and antitumor activities. All conjugates exhibited broad-spectrum activity against Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Bacillus subtilis, and Candida albicans. Moreover, AGA 25 and AGA 50 demonstrated promising capability to suppress the proliferation of human colon cancer cell line (Caco-2), with IC50 190.10 and 180.80 μg/mL respectively.
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Affiliation(s)
- Naglaa Salem El-Sayed
- Cellulose & Paper Department, National Research Centre, 33 El-Bohouth St. Former (El-Tahrir St.), Dokki, Giza, P.O. 12622, Egypt
| | - Amr H Hashem
- Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo 11884, Egypt.
| | - Samir Kamel
- Cellulose & Paper Department, National Research Centre, 33 El-Bohouth St. Former (El-Tahrir St.), Dokki, Giza, P.O. 12622, Egypt.
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Dhayni K, Chabry Y, Hénaut L, Ouled-Haddou H, Avondo C, Tribouilloy C, Caus T, Zibara K, Kamel S, Bennis Y. IL-8 promotes the calcification of human aortic valve interstitial cells, which is prevented through antagonizing CXCR1 and CXCR2 receptors. Archives of Cardiovascular Diseases Supplements 2022. [DOI: 10.1016/j.acvdsp.2021.09.233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Dacrory S, Kamel S. Magnetic composite based on cellulose and GO for latent fingerprint visualization. Egypt J Chem 2021. [DOI: 10.21608/ejchem.2021.103848.4808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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26
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Dacrory S, Hashem AH, Kamel S. Antimicrobial and antiviral activities with molecular docking study of chitosan/carrageenan@clove oil beads. Biotechnol J 2021; 17:e2100298. [PMID: 34743417 DOI: 10.1002/biot.202100298] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 10/31/2021] [Accepted: 11/03/2021] [Indexed: 11/10/2022]
Abstract
BACKGROUND Biopolymers are promising candidates that can be fabricated into hydrophilic matrices and used for many applications due to their distinctive properties such as non-toxic, biodegradable, biocompatibility, and low cost. A promising composite of chitosan and carrageenan with self-crosslinking has been prepared. METHODS AND RESULTS In this study, a rigorous approach for an inexpensive and non-toxic combination of different amounts of clove oil with two polyelectrolytes including chitosan and carrageenan in the form of beads have been prepared. The structure and the surface morphology of the beads were investigated using FTIR, XRD, and SEM. Moreover, antimicrobial, antiviral activity, and molecular docking were evaluated. Antibacterial results revealed that chitosan/carrageenan@clove oil beads have antimicrobial activity as well as chitosan/carrageenan without clove oil against Escherichia colia ATCC25922, Pseudomonas aeruginosa aATCC27853, Staphylococcus aureus ATCC25923, Bacillus subtilisaATCC6051 and Candida albicanssATCC90028. Furthermore, maximum non-toxic concentration (MNTC) of chitosan/carrageenan@clove oil beads was (31.25 μg/mL) which exhibited promising antiviral activity against Herpes simplex virus-1 (HSV-1), and was significantly higher than chitosan/carrageenan without clove oil, where antiviral activity was 82.94 and 57.64% respectively. Eventually, docking study and computational calculation have been used to show the reactivity of the molecules. CONCLUSIONS The developed chitosan/carrageenan@clove oil beads have shown promising properties to be used as carriers of drug delivery, tissue engineering, and regenerative medicine. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Sawsan Dacrory
- Cellulose and Paper Department, National Research Centre, 33 El- Bohouth St., Dokki, Giza, 12622, Egypt
| | - Amr Hosny Hashem
- Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo, 11884, Egypt
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, 33 El- Bohouth St., Dokki, Giza, 12622, Egypt
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Hashem AH, Hasanin M, Kamel S, Dacrory S. A new approach for antimicrobial and antiviral activities of biocompatible nanocomposite based on cellulose, amino acid and graphene oxide. Colloids Surf B Biointerfaces 2021; 209:112172. [PMID: 34715596 DOI: 10.1016/j.colsurfb.2021.112172] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 10/16/2021] [Accepted: 10/18/2021] [Indexed: 01/03/2023]
Abstract
In this work, biocompatible, antimicrobial, and antiviral nanocomposites were prepared through two steps. In the first step, periodate oxidation of cellulose was performed to get dialdehyde cellulose (DAC). The second step included the reaction of DAC with sulfur-containing amino acids included Cysteine (Cys) and Methionine (Meth) in the presence of graphene oxide (GO). The prepared nanocomposites were characterized via FT-IR, SEM, TEM, and TGA. Antimicrobial and antiviral activities for all designed nanocomposites besides DAC were carried out. Both DAC/GO/Cys and DAC/GO/Meth exhibited a promising antimicrobial activity against Gram-negative (E. coli and P. aeruginosa), Gram-positive (B. subtilis and S. aureus), and unicellular fungi (C. Albicans and C. neoformans), while the DAC/GO/Cys/Meth nanocomposite was the lowest. Moreover, all designed nanocomposites have a strong antiviral activity against Herpes simplex virus 1(HSV-1) at minimum nontoxic concentration. Additionally, Computational procedures and Molecular docking showed the reactivity and stability of the molecules that have biological activity against Gram-positive, Gram-negative, and HSV-1. As well as DAC incorporation with amino acid enhanced their reactivity and their interaction.
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Affiliation(s)
- Amr Hosny Hashem
- Botany and Microbiology Department, Faculty of Science, Al-Azhar University, Cairo 11884, Egypt.
| | - Mohamed Hasanin
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth St., Dokki, Giza 12622, Egypt.
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth St., Dokki, Giza 12622, Egypt
| | - Sawsan Dacrory
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth St., Dokki, Giza 12622, Egypt
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Dhayni K, Chabry Y, Henaut L, Ouled-Haddou H, Avondo C, Tribouilloy C, Caus T, Zibara K, Kamel S, Bennis Y. IL-8 promotes the calcification of human aortic valve interstitial cells, which is prevented through antagonizing CXCR1 and CXCR2 receptors. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.3333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background/Introduction
Inflammation is a key feature of calcific aortic valve stenosis (CAVS) against which there is currently no pharmacological treatment.
Purpose
To verify the hypothesis that interleukin-8 (IL-8), a pro-inflammatory factor involved in arterial calcifications, also promotes the calcification of human aortic valve interstitial cells (hVICs).
Methods
Primary hVICs were isolated from healthy pieces of aortic valves harvested from patients undergoing surgical valve replacement. They were cultured in a pro-calcifying condition (Pi-3.8mM) with or without IL-8 (5 to 50 pg/ml) for up to 21 days. Calcification was analysed by alizarin red staining and calcium content was measured with the o-cresolphthalein complexone method. The viability of hVICs was verified by the MTT assay. The expression of osteogenic (BMP2, OPN, osterix and ALP) and myofibrotic (alpha-SMA, collagen-1, collagen-3 and elastin) markers as well as that of metalloproteases (MMP-2, -9 and -12) was analysed by RT-qPCR. The expression of IL-8 receptors, CXCR-1 and CXCR-2 was evaluated by Western blot and flow cytometry, and the effects of IL-8 were tested in the presence or absence of SCH527123, an antagonist of CXCR-1 and CXCR-2. Finally, the expression of CXCR-1 and -2 and elastin was analysed by immunohistochemistry in the calcified and non-calcified areas of human aortic valve samples. All of these experiments were carried out from valves of at least 5 different donors and a P<0.05 was considered statistically significant.
Results
IL-8 (15 pg/mL) caused a significant ∼2-fold increase in the calcification of hVICs in the Pi condition, compared to the Pi-only condition, without modulation of cell viability. In the presence of Pi, IL-8 exposure significantly stimulated the expression of the transcripts of elastin and MMP-12, an elastase, and reduced that of OPN, a well-known inhibitor of calcification. The effects of IL-8 on hVICs calcification and on the expression of MMP-12, elastin and OPN transcripts were significantly prevented by the addition of SCH527123. In addition, the expression of CXCR-1 and -2 was confirmed in histological samples of human aortic valves. This expression was more pronounced in calcified areas compared to non-calcified areas and co-localized with degraded elastin.
Conclusion
IL-8 promoted the calcification of hVICs in culture. This effect was significantly prevented by antagonizing CXCR-1 and CXCR-2 IL-8 receptors, which we showed for the first time to be expressed by human VICs and aortic valves of patients with CAVS. Further studies are underway to clarify the cellular mechanisms involved.
Funding Acknowledgement
Type of funding sources: Public Institution(s). Main funding source(s): Fédération Hospitalo-Universitaire REMOD-VHF
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Affiliation(s)
- K Dhayni
- UPJV Amiens, MP3CV Laboratory. UPJV UR 7517, Amiens, France
| | - Y Chabry
- University Hospital of Amiens, Department of cardiac surgery, Amiens, France
| | - L Henaut
- UPJV Amiens, MP3CV Laboratory. UPJV UR 7517, Amiens, France
| | - H Ouled-Haddou
- UPJV Amiens, HEMATIM Laboratory, UPJV UR 4666, Amiens, France
| | - C Avondo
- UPJV Amiens, MP3CV Laboratory. UPJV UR 7517, Amiens, France
| | - C Tribouilloy
- University Hospital of Amiens, Department of Cardiology, Amiens, France
| | - T Caus
- University Hospital of Amiens, Department of cardiac surgery, Amiens, France
| | - K Zibara
- Lebanese University, Department of Biology, Faculty of Sciences, Beirut, Lebanon
| | - S Kamel
- UPJV Amiens, MP3CV Laboratory. UPJV UR 7517, Amiens, France
| | - Y Bennis
- UPJV Amiens, MP3CV Laboratory. UPJV UR 7517, Amiens, France
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Hasanin MS, El-Sakhawy M, Ahmed HY, Kamel S. Hydroxypropyl methylcellulose/graphene oxide composite as drug carrier system for5-Fluorouracil. Biotechnol J 2021; 17:e2100183. [PMID: 34499787 DOI: 10.1002/biot.202100183] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 08/21/2021] [Accepted: 09/03/2021] [Indexed: 11/08/2022]
Abstract
AIM This study aims to prepare green nanocomposite (HPMC/5-FL@GO) from the most biocompatible materials, hydroxypropyl methylcellulose (HPMC) and graphene oxide (GO), to enhance the drug activity of immobilized 5- Fluorouracil (5-FU) with decreasing the side effect of long-run treatment protocols with highly efficient drug-drug activity. METHOD AND RESULTS Different samples were characterized by ATR-FTIR spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) coupled with energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), Thermogravimetric analysis (TGA), and dynamic light scattering (DLS) along with cytotoxicity and anticancer study. A homogenous and compatible nanocomposite structure with a homogenous drug distribution was confirmed. The results suggested that the prepared nanocomposite has a low cytotoxicity effect against normal Vero cell lines compared with 5-FU. The antitumor activities of the same nanocomposite (20.4 and 74.3 μg/ml on A549 and HepG-2) were lower than that of 5-FU (54.1and 103 μg/ml on A549 and HepG-2). CONCLUSION AND IMPLICATIONS According to the attained results, the HPMC/5-FL@GO can be expected to be widely applied in a biomedical application such as cancer therapy with the unique biocompatible to human cells. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Mohamed S Hasanin
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth Str., Dokki Giza, P.O. 12622, Egypt
| | - Mohamed El-Sakhawy
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth Str., Dokki Giza, P.O. 12622, Egypt
| | - Hanaa Y Ahmed
- The Regional Center for Mycology and Biotechnology, Al-Azhar University, Cairo, Egypt
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth Str., Dokki Giza, P.O. 12622, Egypt
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Khattab TA, Tolba E, Gaffer H, Kamel S. Development of Electrospun Nanofibrous-Walled Tubes for Potential Production of Photoluminescent Endoscopes. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c01519] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Tawfik A. Khattab
- Dyeing, Printing and Auxiliaries Department, National Research Centre, Cairo 12622, Egypt
| | - Emad Tolba
- Polymers and Pigments Department, National Research Centre, Cairo 12622, Egypt
| | - Hatem Gaffer
- Dyeing, Printing and Auxiliaries Department, National Research Centre, Cairo 12622, Egypt
| | - Samir Kamel
- Cellulose and Papers Department, National Research Centre, Cairo 12622, Egypt
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Ali S, Kamel S, Easow J, Blasubramanian R, Parvathy P. Assessment of cognitive function following a course of electroconvulsive therapy. Eur Psychiatry 2021. [PMCID: PMC9475587 DOI: 10.1192/j.eurpsy.2021.1306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Introduction ECT is a potentially life-saving treatment for patients with severe or treatment resistant depression. Cognitive function disturbances following ECT are generally transient, but could be of longer duration in some cases Objectives To assess the cognitive side effects in patients with affective disorders treated with a course of electroconvulsive therapy (ECT). Methods Cognitive functions of patients who undergo ECT was assessed prior to start of treatment, midway of the course of treatment and after end of the course of treatment using Montreal Cognitive Assessment (MoCA). We did a retrospective analysis of MoCA scores of 15 patients who received bilateral ECT in 2017-2018. In order to assess the efficacy of ECT in the treatment of their illness, we did a retrospective analysis of Montgomery Asberg Depression Rating Scale (MADRS) scores of 18 patients who received bilateral ECT in 2017-2018 Results Only 7% of the patients who underwent ECT in our sample did have significant cognitive decline as per their MoCA scores. 28% of patients achieved complete remission in their depressive symptomes. 22% of patients continued on maintenance treatment. 95% of patients showed significant improvement in their symptoms following treatment with ECT where there symptoms reduced to either mild or minimal depressive symptoms. Conclusions Cognitive side effect was not a significant side effect in our sample of patients. We did see an improvement in cognitive function in a significant number of the sample of patients as they progressed with treatment, which coincided with improvement in their affective symptoms.
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Al Shareef W, Sayed S, Kamel S, Alkaf H, Bahaj A, Amin R, Al Herabi A. Locally advanced tongue squamous cell carcinoma in epidermolysis simplex bullosa patient: a therapeutic conundrum. Ann R Coll Surg Engl 2021; 103:e85-e87. [PMID: 33645266 DOI: 10.1308/rcsann.2020.7080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Epidermolysis bullosa simplex (EBS) is a debilitating condition affecting the skin and mucous membranes that is characterised by frequent ulceration and blistering on trivial trauma. In EBS, oral cavity mucosal injuries lead to a high propensity for developing squamous cell carcinomas. Locally advanced tongue carcinoma arising in this background presents a challenging therapeutic conundrum. To our knowledge, this is the first case of aggressive locally advanced tongue carcinoma that has developed sporadically in a patient with EBS and no family history. Routine screening of oral mucosal lesions will lead to early detection and timely management of this debilitating condition.
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Affiliation(s)
- W Al Shareef
- Head and Neck & Skull Base Centre, King Abdullah Medical City, Mecca, Saudi Arabia
| | - S Sayed
- Head and Neck & Skull Base Centre, King Abdullah Medical City, Mecca, Saudi Arabia
| | - S Kamel
- Head and Neck & Skull Base Centre, King Abdullah Medical City, Mecca, Saudi Arabia
| | - H Alkaf
- Head and Neck & Skull Base Centre, King Abdullah Medical City, Mecca, Saudi Arabia
| | - A Bahaj
- Head and Neck & Skull Base Centre, King Abdullah Medical City, Mecca, Saudi Arabia
| | - R Amin
- Head and Neck & Skull Base Centre, King Abdullah Medical City, Mecca, Saudi Arabia
| | - A Al Herabi
- Head and Neck & Skull Base Centre, King Abdullah Medical City, Mecca, Saudi Arabia
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33
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Abdelrahman MS, Khattab TA, Kamel S. Hydrazone‐Based Supramolecular Organogel for Selective Chromogenic Detection of Organophosphorus Nerve Agent Mimic. ChemistrySelect 2021. [DOI: 10.1002/slct.202004850] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Meram S. Abdelrahman
- Dyeing Printing and Auxiliaries Department National Research Centre Cairo 12622 Egypt
| | - Tawfik A. Khattab
- Dyeing Printing and Auxiliaries Department National Research Centre Cairo 12622 Egypt
| | - Samir Kamel
- Chemical Industries Research Division National Research Centre Cairo 12622 Egypt
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Abdelrahman MS, Khattab TA, Kamel S. Development of a novel colorimetric thermometer based on poly( N-vinylcaprolactam) with push–π–pull tricyanofuran hydrazone anion dye. NEW J CHEM 2021. [DOI: 10.1039/d1nj00221j] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Thermochromic poly(N-vinylcaprolactam-co-tricyanofuran hydrazone) [poly(VC-co-TCFH)] gel labeled with a halochromic chromophore was developed using traditional free radical polymerization.
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Affiliation(s)
- Meram S. Abdelrahman
- Dyeing
- Printing and Auxiliaries Department
- National Research Centre
- Cairo 12622
- Egypt
| | - Tawfik A. Khattab
- Dyeing
- Printing and Auxiliaries Department
- National Research Centre
- Cairo 12622
- Egypt
| | - Samir Kamel
- Chemical Industries Research Division
- National Research Centre
- Cairo 12622
- Egypt
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Abou-Zeid RE, Kamal KH, Abd El-Aziz ME, Morsi SM, Kamel S. Grafted TEMPO-oxidized cellulose nanofiber embedded with modified magnetite for effective adsorption of lead ions. Int J Biol Macromol 2020; 167:1091-1101. [PMID: 33186652 DOI: 10.1016/j.ijbiomac.2020.11.063] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 11/08/2020] [Accepted: 11/09/2020] [Indexed: 12/19/2022]
Abstract
According to the World Health Organization, nearly a billion people do not have incoming to pure drinking water and much of that water is contaminated with high levels of heavy elements. In this study, adsorption of lead ions has been studied by nanocomposites which prepared through acrylic acid grafting and amino-functionalized magnetized (FM-NPs) TEMPO-oxidized cellulose nanofiber (TEMPO-CNF). The amino-functionalized magnetite was acting as a crosslinked. The crystallinity of TEMPO-CNF was 75 with a 4-10 nm diameter range, while the average particle size of FM-NPs was 30 nm. The adsorption studies illustrated that the elimination efficiency of lead ions was 80% by the prepared nanocomposite that includes a minimum amount of crosslinker (1%), which demonstrated that the magnetic grafted oxidized cellulose nanofiber nanocomposite is a promising green adsorbent material to eliminate heavy metal ions and is additionally easy to get rid of due to its magnetic property. The kinetics and isotherms studied found that the sorption reaction follows a pseudo-second-order model (R2 = 0.997) and Freundlich model (R2 = 0.993), respectively, this indicated that the adsorption of lead ion occurs within the pores and via the functional groups present on the nanocomposite.
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Affiliation(s)
- Ragab E Abou-Zeid
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth St., Dokki, Giza, P.O. 12622, Egypt
| | - Kholod H Kamal
- Water Pollution Research Department, National Research Centre, 33 El Bohouth St., Dokki, Giza, P.O. 12622, Egypt
| | - M E Abd El-Aziz
- Polymers and Pigments Department, National Research Centre, 33 El Bohouth St., Dokki, Giza, P.O. 12622, Egypt.
| | - S M Morsi
- Polymers and Pigments Department, National Research Centre, 33 El Bohouth St., Dokki, Giza, P.O. 12622, Egypt
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth St., Dokki, Giza, P.O. 12622, Egypt
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Kamel S, A. Khattab T. Recent Advances in Cellulose-Based Biosensors for Medical Diagnosis. Biosensors (Basel) 2020; 10:E67. [PMID: 32560377 PMCID: PMC7345568 DOI: 10.3390/bios10060067] [Citation(s) in RCA: 56] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 06/10/2020] [Accepted: 06/15/2020] [Indexed: 12/11/2022]
Abstract
Cellulose has attracted much interest, particularly in medical applications such as advanced biosensing devices. Cellulose could provide biosensors with enhanced biocompatibility, biodegradability and non-toxicity, which could be useful for biosensors. Thus, they play a significant role in environmental monitoring, medical diagnostic tools, forensic science, and foodstuff processing safety applications. This review summarizes the recent developments in cellulose-based biosensors targeting the molecular design principles toward medical detection purposes. The recognition/detection mechanisms of cellulose-based biosensors demonstrate two major classes of measurable signal generation, including optical and electrochemical cellulosic biosensors. As a result of their simplicity, high sensitivity, and low cost, cellulose-based optical biosensors are particularly of great interest for including label-free and label-driven (fluorescent and colorimetric) biosensors. There have been numerous types of cellulose substrates employed in biosensors, including several cellulose derivatives, nano-cellulose, bacterial cellulose, paper, gauzes, and hydrogels. These kinds of cellulose-based biosensors were discussed according to their preparation procedures and detection principle. Cellulose and its derivatives with their distinctive chemical structure have demonstrated to be versatile materials, affording a high-quality platform for accomplishing the immobilization process of biologically active molecules into biosensors. Cellulose-based biosensors exhibit a variety of desirable characteristics, such as sensitivity, accuracy, convenience, quick response, and low-cost. For instance, cellulose paper-based biosensors are characterized as being low-cost and easy to operate, while nano-cellulose biosensors are characterized as having a good dispersion, high absorbance capacity, and large surface area. Cellulose and its derivatives have been promising materials in biosensors which could be employed to monitor various bio-molecules, such as urea, glucose, cell, amino acid, protein, lactate, hydroquinone, gene, and cholesterol. The future interest will focus on the design and construction of multifunctional, miniaturized, low-cost, environmentally friendly, and integrated biosensors. Thus, the production of cellulose-based biosensors is very important.
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Affiliation(s)
- Samir Kamel
- Cellulose and Paper Department, National Research Centre, Cairo 12622, Egypt;
| | - Tawfik A. Khattab
- Dyeing, Printing and Auxiliaries Department, National Research Centre, Cairo 12622, Egypt
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El-Nahrawy AM, Abou Hammad AB, Khattab TA, Haroun A, Kamel S. Development of electrically conductive nanocomposites from cellulose nanowhiskers, polypyrrole and silver nanoparticles assisted with Nickel(III) oxide nanoparticles. REACT FUNCT POLYM 2020. [DOI: 10.1016/j.reactfunctpolym.2020.104533] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Akl EM, Dacrory S, Abdel-Aziz MS, Kamel S, Fahim AM. Preparation and characterization of novel antibacterial blended films based on modified carboxymethyl cellulose/phenolic compounds. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-020-03148-w] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Dacrory S, Moussa M, Turky G, Kamel S. In situ synthesis of Fe 3O 4@ cyanoethyl cellulose composite as antimicrobial and semiconducting film. Carbohydr Polym 2020; 236:116032. [PMID: 32172848 DOI: 10.1016/j.carbpol.2020.116032] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Revised: 02/16/2020] [Accepted: 02/17/2020] [Indexed: 02/08/2023]
Abstract
Cyanoethyl cellulose (CEC)/ magnetite (Fe3O4) flexible composite film with enhanced dielectric and magnetic properties was successfully prepared. CEC has been synthesized from micro crystalline cellulose (MCC). The effects of magnetite mass fraction on the morphology, microstructure, thermal stability, and antimicrobial activity of the as-prepared composite films were investigated. The Vibrating sample magnetometer (VSM) and broadband dielectric spectrometer was also employed to study the magnetic and dielectric properties, respectively. In addition to study the computational calculation of MCC, and CEC by DFT/ B3LYP/6-31G (d) basis sets. The results showed that, the sample that is magnetite free has a diamagnetic response to the applied magnetic field, however the other samples that is loaded with magnetite show super-paramagnetic behavior indicating that the particles' sizes of the magnetite mostly below 20 nm. Also, antimicrobial activities of composite films against (G + ve), (G-ve), were investigated.
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Affiliation(s)
- Sawsan Dacrory
- Cellulose and Paper Department, National Research Centre, 33 El- Bohouth St., Dokki, Giza, 12622, Egypt.
| | - Mohammed Moussa
- Microwave Physics & Dielectrics Department, National Research Centre, 33 El- Bohouth St., Dokki, Giza, 12622, Egypt
| | - Gamal Turky
- Microwave Physics & Dielectrics Department, National Research Centre, 33 El- Bohouth St., Dokki, Giza, 12622, Egypt
| | - Samir Kamel
- Cellulose and Paper Department, National Research Centre, 33 El- Bohouth St., Dokki, Giza, 12622, Egypt
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Khattab TA, Abd El‐Aziz M, Abdelrahman MS, El‐Zawahry M, Kamel S. Development of long‐persistent photoluminescent epoxy resin immobilized with europium (II)‐doped strontium aluminate. LUMINESCENCE 2019; 35:478-485. [DOI: 10.1002/bio.3752] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 10/16/2019] [Accepted: 11/19/2019] [Indexed: 01/05/2023]
Affiliation(s)
- Tawfik A. Khattab
- Dyeing, Printing and Auxiliaries DepartmentNational Research Centre Giza Egypt
| | | | | | - Manal El‐Zawahry
- Dyeing, Printing and Auxiliaries DepartmentNational Research Centre Giza Egypt
| | - Samir Kamel
- Cellulose & Paper DepartmentNational Research Centre Giza Egypt
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Khattab TA, Dacrory S, Abou-Yousef H, Kamel S. Smart microfibrillated cellulose as swab sponge-like aerogel for real-time colorimetric naked-eye sweat monitoring. Talanta 2019; 205:120166. [DOI: 10.1016/j.talanta.2019.120166] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 07/16/2019] [Accepted: 07/18/2019] [Indexed: 01/25/2023]
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Youssef A, El-Aziz MA, Abd El-Sayed ES, Moussa M, Turky G, Kamel S. Rational design and electrical study of conducting bionanocomposites hydrogel based on chitosan and silver nanoparticles. Int J Biol Macromol 2019. [DOI: 10.1016/j.ijbiomac.2019.08.199 10.1016/s0022-3093(02)01083-9 10.1016/j.molliq.2017.06.126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/01/2022]
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Youssef A, El-Aziz MA, Abd El-Sayed ES, Moussa M, Turky G, Kamel S. Rational design and electrical study of conducting bionanocomposites hydrogel based on chitosan and silver nanoparticles. Int J Biol Macromol 2019; 140:886-894. [DOI: 10.1016/j.ijbiomac.2019.08.199] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Revised: 08/19/2019] [Accepted: 08/22/2019] [Indexed: 01/20/2023]
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Mary A, Issa H, Boullier A, Henaut L, Avondo C, Brazier M, Mentaverri R, Tribouilloy C, Messika-Zeitoun D, Kamel S. P905Association of ionized serum magnesium with progression of aortic valve calcification. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Calcific aortic valve disease (CAVD) is the most common heart valve disease among adults. It is a progressive disease whose final step leads to severe aortic stenosis (AS). Pharmacotherapeutic strategies aimed to limit the progression of valve leaflet calcification could be beneficial to slow-down the CAVD progression and to preserve left ventricular function. Several recent clinical studies demonstrated that lower serum magnesium (Mg) level is associated with vascular calcification. Whether serum magnesium is a determinant of aortic calcific stenosis progression remains unkwown.
Methods
In an ongoing prospective cohort of AS patients (COFRASA/GENERAC) we studied the association between serum Mg with the aortic valve calcification prevalence and progression. Serum Mg was measured at baseline in both its ionized (iMg) and total (tMg) forms. AS stenosis severity was evaluated at baseline and yearly thereafter using mean pressure gradient (MPG), the aortic valve area indexed to body surface (AVAi) assessed by echocardiography and the degree of aortic valve calcification (AVC) assessed by computed tomography. Annual progression was calculated as: (final measurement − baseline measurement)/follow-up duration.
Results
We enrolled 356 patients (73.1±10 years, 73% men), the mean follow-up duration was 2.5±2 years. There was a highly significant correlation between iMg and t Mg concentrations values (r=0.85, p<0.0001). Approximately 37% and 25% of patients have respectively iMg values ≤0.45 mmol/L (normal range 0.45–0.60 mmol/L) and t Mg ≤0.80 mmol/L (normal range 0.80–0.95 mmol/L). At baseline, lower i Mg and t Mg were significantly associated with sex, diabètes, lower heamoglobin and hypertension but not with AVC neither with MPG or AVAi. After mean follow-up of 2.5±2 years, the annual mean Log AVC progression was significantly greater (p=0.01) in patients with values of iMg ≤0.45 mmol/L (2,04±0.73) as compared to patients with iMg >0,45 mmol/L (1.78±0.94). Annual Mean MGP and AVAi also progressed greater in patients with low iMg but without reaching a significant level. Similar association was not found with tMg. In multivariate analysis, iMg remained significantly associated with the progression of AVC (odds ratio per 0.1 mmol/L increment [95% confidence interval] = 0.36 [0.15–0.83]; p=0.015) independently of age, tMg, glucose, type 2 diabetes, Tobacco use, baseline AVC, MPG and AVAi.
Conclusion
In a prospective cohort of asymptomatic patients with a wide range of AS severity, low serum ionized Mg but not low total Mg was independently associated with AVC progression.
Acknowledgement/Funding
ANR -RHU-STOPAS
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Affiliation(s)
- A Mary
- UPJV Amiens CHU Amiens, Amiens, France
| | - H Issa
- UPJV Amiens CHU Amiens, Amiens, France
| | | | - L Henaut
- UPJV Amiens CHU Amiens, Amiens, France
| | - C Avondo
- UPJV Amiens CHU Amiens, Amiens, France
| | - M Brazier
- UPJV Amiens CHU Amiens, Amiens, France
| | | | | | | | - S Kamel
- UPJV Amiens CHU Amiens, Amiens, France
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Candellier A, Choukroun G, Grissi M, Boudot C, Lenglet G, Avondo C, Chillon J, Kamel S, Brazier M, Hénaut L. Impact de l’indoxyl-sulfate sur le développement du rétrécissement aortique calcifié. Nephrol Ther 2019. [DOI: 10.1016/j.nephro.2019.07.300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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47
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Khattab TA, Dacrory S, Abou-Yousef H, Kamel S. Development of microporous cellulose-based smart xerogel reversible sensor via freeze drying for naked-eye detection of ammonia gas. Carbohydr Polym 2019; 210:196-203. [DOI: 10.1016/j.carbpol.2019.01.067] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 01/17/2019] [Accepted: 01/18/2019] [Indexed: 12/26/2022]
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Abou Hammad AB, Abd El-Aziz ME, Hasanin MS, Kamel S. A novel electromagnetic biodegradable nanocomposite based on cellulose, polyaniline, and cobalt ferrite nanoparticles. Carbohydr Polym 2019; 216:54-62. [PMID: 31047082 DOI: 10.1016/j.carbpol.2019.03.038] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Revised: 02/21/2019] [Accepted: 03/12/2019] [Indexed: 10/27/2022]
Abstract
Biodegradable, antimicrobial, and semiconducting cellulosic composite was synthesized by in-situ polymerization of polyaniline in the presence of cellulose. The cobalt ferrite nanoparticles (CFO-NPs) were added during the polymerization process to acquire this composite magnetic property. The CFO-NPs were prepared by sol-gel method with average particles size less than 50 nm. The nanocomposites were characterized by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX). In addition, their magnetic, dielectric constant, dielectric loss, and conductivity behaviors were studied. The magnetization (Ms) and conductivity increased up to 3.7 emu/g and 3.5 × 10-3 S/cm, respectively, with increasing CFO-NPs content. The prepared electromagnetic nanocomposite exhibits highly efficient biodegradability and antimicrobial activity against Escherichia coli, Bacillus subtilis, and Candida albicans. The antimicrobial activity increased with increasing CFO-NPs while the biodegradability decreased.
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Affiliation(s)
- A B Abou Hammad
- Solid-State Department, National Research Centre, 33 El Bohouth St., Dokki, Giza P.O. 12622, Egypt
| | - M E Abd El-Aziz
- Polymers and Pigments Department, National Research Centre, 33 El Bohouth St., Dokki, Giza P.O. 12622, Egypt.
| | - M S Hasanin
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth St., Dokki, Giza P.O. 12622, Egypt
| | - S Kamel
- Cellulose and Paper Department, National Research Centre, 33 El Bohouth St., Dokki, Giza P.O. 12622, Egypt
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Abd El-Sayed E, El-Sakhawy M, Kamel S, El-Gendy A, Abouzeid R. Eco-friendly Mimosa Tannin Adhesive System for Bagasse Particleboard Fabrication. Egypt J Chem 2018. [DOI: 10.21608/ejchem.2018.5413.1479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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50
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Kamel S, Ibrahim M, Awad ET, El-Hindi HMA, Abdel-Aziz SA. Differential expression of CYP2j2 gene and protein in Camelus dromedarius. J BIOL REG HOMEOS AG 2018; 32:1473-1477. [PMID: 30378391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
CYP2J2 is a member of the cytochrome P450 superfamily. It had been described in different mammalian species; however, no studies have described this gene in Camelus dromedarius. CYP2J2 is an epoxygenase enzyme which oxidizes various fatty acids, mainly arachidonic acid, via NADPH-dependent epoxidation to generate epoxyeicosatrienoic acids (EETs). It is a multi-functional enzyme that plays crucial roles in inflammation, cancer, drug metabolism, and embryo development. It controls the water re-absorption in the kidney and maintains the blood pressure and glucose homeostasis. This study is considered the first report investigating the differential expression profiles of the CYP2J2 mRNA and protein in the liver, heart, and kidney of Camelus dromedarius. A total of 30 samples were used to determine the expression of both CYP2J2 mRNA and protein using qRT-PCR and western blotting methods, respectively. The mRNA level of CYP2J2 was significantly elevated in the liver compared to that in the heart and kidney. The tissue distribution of the CYP2J2 protein was coherent to its transcript level in the kidney, but not in the liver and heart samples. The difference between the CYP2J2 mRNA and protein distributions in the three studied organs may be attributed to the mechanism by which the CYP2J2 might be involved in the adaptability of the camel to the arid environment.
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Affiliation(s)
- S Kamel
- Biochemistry and Chemistry of Nutrition Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - M Ibrahim
- Biochemistry and Chemistry of Nutrition Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - E T Awad
- Biochemistry and Chemistry of Nutrition Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - H M A El-Hindi
- Biochemistry and Chemistry of Nutrition Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
| | - S A Abdel-Aziz
- Biochemistry and Chemistry of Nutrition Department, Faculty of Veterinary Medicine, Cairo University, Giza, Egypt
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