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Badr, Y., Z. I. Ali, and R. M. Khafagy, "UV laser induced fluorescence of unirradiated and irradiated low density polyethylene", Journal of Photochemistry and Photobiology A: Chemistry, vol. 124, no. 1-2, pp. 35-40, 1999. AbstractWebsite
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Badr, I. H. A., M. Gouda, R. Abdel-Sattar, and H. E. M. Sayour, "Reduction of thrombogenicity of PVC-based sodium selective membrane electrodes using heparin-modified chitosan", Carbohydrate Polymers, vol. 99, pp. 783 - 790, 2014. AbstractWebsite

Abstract Heparin-modified chitosan (H-chitosan) membrane was utilized to enhance biocompatibility of sodium selective membrane electrode based on the highly thrombogenic polyvinyl chloride (PVC). Sodium ion sensing film was prepared using PVC, sodium ionophore-X, potassium tetrakis(chlorophenyl)-borate, and o-nitrophenyloctylether. The PVC-based sensing film was sandwiched to chitosan or H-chitosan to prevent platelet adhesion on the surface of PVC. Potentiometric response characteristics of PVC-chitosan and PVC-H-chitosan membrane electrodes were found to be comparable to that of a control \{PVC\} based sodium-selective electrode. This indicates that chitosan and H-chitosan layers do not alter the response behaviour of the PVC-based sensing film. Biocompatibility of H-chitosan was confirmed by in vitro platelet adhesion study. The platelet adhesion investigations indicated that H-chitosan film is less thrombogenic compared to PVC, which could result in enhancement of biocompatibility of sodium selective membrane electrodes based on PVC, while maintaining the overall electrochemical performance of the PVC-based sensing film.

Badr, Y., and M. A. Mahmoud, "Excimer laser photofragmentation of metallic nanoparticles", Physics Letters, Section A: General, Atomic and Solid State Physics, vol. 370, no. 2, pp. 158-161, 2007. AbstractWebsite
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Badr, Y., and M. A. Mahmoud, "Size-dependent spectroscopic, optical, and electrical properties of PbSe nanoparticles", Crystal Research and Technology, vol. 41, no. 7, pp. 658-663, 2006. AbstractWebsite
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Badr, Y. A., I. M. Taher, M. M. Bahgat, and D. F. Ghoneim, "Deep sclerectomy using Erbium: YAG laser in pig's eyes", Progress in Biomedical Optics and Imaging - Proceedings of SPIE, vol. 5, no. 3, pp. 253-261, 2004. Abstract
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Badr, Y., Z. I. Ali, and R. M. Khafagy, "On the mechanism of low temperature glass transition in low density polyethylene films", Radiation Physics and Chemistry, vol. 58, no. 1, pp. 87-100, 2000. AbstractWebsite
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Badr, Y., I. K. Battisha, and M. A. Salem, "Up-conversion luminescence application in Er3+: TiO2 thin film prepared by dip coating sol-gel route", Indian Journal of Pure and Applied Physics, vol. 46, no. 10, pp. 706-711, 2008. AbstractWebsite
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Badr, Y. A., S. B. El‐Giziri, and T. M. Hammad, "On the effect of doping on the mechanism of phase transition of some ionic inorganic compounds", physica status solidi (a), vol. 100, no. 2, pp. 467-472, 1987. AbstractWebsite
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Badr, Y. A., F. El‐Kabbany, G. Said, and O. W. Saleh, "Effect of the internal motion of NH 4+ on the properties of some halides", physica status solidi (a), vol. 60, no. 1, pp. 297-301, 1980. AbstractWebsite
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Badr, Y., and M. GHEITH, "Spectroscopic analysis of both enamel and dentin surfaces following XeCl excimer laser surface treatment", Progress in Biomedical Optics and Imaging - Proceedings of SPIE, vol. 7884, 2011. Abstract
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Badr, Y., M. G. A. E. Wahed, and M. A. Mahmoud, "On 308 nm photofragmentation of the silver nanoparticles", Applied Surface Science, vol. 253, no. 5, pp. 2502-2507, 2006. AbstractWebsite
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Badr, Y. A., M. A. Kereim, M. A. Yehia, O. O. Fouad, and A. Bahieldin, "Production of fertile transgenic wheat plants by laser micropuncture", Photochemical and Photobiological Sciences, vol. 4, no. 10, pp. 803-807, 2005. AbstractWebsite
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Badr, Y., and M. A. Mahmoud, "Effect of PbS shell on the optical and electrical properties of PbSe core nanoparticles doped in PVA", Physica B: Condensed Matter, vol. 388, no. 1-2, pp. 134-138, 2007. AbstractWebsite
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Badr, Y., and M. A. Kareim, "New applications of lasers in photobiology and photochemistry", AIP Conference Proceedings, vol. 748, pp. 242-248, 2005. Abstract
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Badr, Y. A., and S. B. El-Guiziri, "Effect of γ-radiation on the phase transition temperature of Li0.5(NH4)0.5SO4", Journal of Physics and Chemistry of Solids, vol. 50, no. 12, pp. 1261 - 1264, 1989. AbstractWebsite

Polycrystalline lithium-ammonium sulphate samples were subjected to X-ray diffraction analysis for determining the lattice parameters of the prepared mixed crystals. The compositions of the samples were determined using X-ray microanalysis. The Li0.5(NH4)0.5SO4 samples were irradiated with different doses of γ-radiation in order to investigate the effect of this ionizing radiation on the phase transition temperatures Tc1 and Tc2. The temperature dependence of the d.c. resistivity ρd.c. and dielectric constant ϵ of irradiated samples showed (i) a shift of Tc1 to higher temperatures; (ii) a shift of Tc2 to lower temperatures; and (iii) the appearance of a new anomaly near 128°C at moderately high γ-doses. The mechanisms giving rise to this behaviour are discussed.

Badr, Y. A., and S. Awad, "On the low temperature phase transition in (NH4)2SO4", Journal of Physics and Chemistry of Solids, vol. 45, no. 3, pp. 351-353, 1984. AbstractWebsite
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Badr, Y. A., L. M. A. El-Gawad, and M. E. Ghaith, "Morphological changes of the root surface and fracture resistance after treatment of root fracture by CO2 laser and glass Ionomer or mineral trioxide aggregates", AIP Conference Proceedings, vol. 1172, pp. 114-118, 2009. Abstract
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Badr, Y., S. Abd El-wanees, and M. A. Mahmoud, "The ro-vibrational spectra of CO molecule resulting from the photolysis of acetone", Journal of Photochemistry and Photobiology A: Chemistry, vol. 167, no. 2-3, pp. 159-162, 2004. AbstractWebsite
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Badr, Y., and S. HassabElnaby, "Raman, Mid and Nir FTIR absorption spectra of breast cancer reveal a good diagnosis tool", Proceedings of SPIE - The International Society for Optical Engineering, vol. 5325, pp. 78-88, 2004. Abstract
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Badr, Y. A., M. S. Aly, M. F. Hassan, A. M. Elmahdy, and A. M. Azzam, "Far field scattering of Gaussian beam by an infinitely long conducting circular cylinder", 2nd Workshop on Teaching Photonics at Egyptian Engineering Faculties and Institutes, pp. 68-83, 2000. Abstract
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Badr, Y. A. -kh., S. V. Karpov, and A. A. Shultin, "RAMAN SPECTRUM OF THE LATTICE VIBRATIONS OF RUBIDIUM AND CESIUM NITRATE CRYSTALS IN THE REGION OF THE LOW-TEMPERATURE ANOMALY OF THE DIELECTRIC CONSTANT.", Sov Phys Solid State, vol. 16, no. 8, pp. 1515-1516, 1975. AbstractWebsite
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Badr, Y., M. G. Abd El-Wahed, and M. A. Mahmoud, "Photocatalytic degradation of methyl red dye by silica nanoparticles", Journal of Hazardous Materials, vol. 154, no. 1-3, pp. 245-253, 2008. AbstractWebsite
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Badr, Y., and M. A. Mahmoud, "On interaction of 193 nm excimer laser with acetone (3s Rydberg state)", Journal of Molecular Structure, vol. 748, no. 1-3, pp. 189-193, 2005. AbstractWebsite
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Badr, I. H. A., M. Gouda, R. Abdel-Sattar, and H. E. M. Sayour, "Reduction of thrombogenicity of PVC-based sodium selective membrane electrodes using heparin-modified chitosan", Carbohydrate Polymers, vol. 99, pp. 783 - 790, 2014. AbstractWebsite

Abstract Heparin-modified chitosan (H-chitosan) membrane was utilized to enhance biocompatibility of sodium selective membrane electrode based on the highly thrombogenic polyvinyl chloride (PVC). Sodium ion sensing film was prepared using PVC, sodium ionophore-X, potassium tetrakis(chlorophenyl)-borate, and o-nitrophenyloctylether. The PVC-based sensing film was sandwiched to chitosan or H-chitosan to prevent platelet adhesion on the surface of PVC. Potentiometric response characteristics of PVC-chitosan and PVC-H-chitosan membrane electrodes were found to be comparable to that of a control \{PVC\} based sodium-selective electrode. This indicates that chitosan and H-chitosan layers do not alter the response behaviour of the PVC-based sensing film. Biocompatibility of H-chitosan was confirmed by in vitro platelet adhesion study. The platelet adhesion investigations indicated that H-chitosan film is less thrombogenic compared to PVC, which could result in enhancement of biocompatibility of sodium selective membrane electrodes based on PVC, while maintaining the overall electrochemical performance of the PVC-based sensing film.

Badr, Y. A., M. I. Youssif, T. El-Sherbini, and D. Hassan, "Fabrication and characterization of superconducting nano layer by pulsed laser deposition", Life Science Journal, vol. 13, no. 5, pp. 8-20, 2016. AbstractWebsite
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