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Tawfik, W., "High-power table-top white-light few-cycle laser generator.", Ukr. J. Phys. Opt, vol. 16, issue 3, pp. 111, 2015. paper_3.pdf
Tawfik, W., "High-power table-top white-light few-cycle laser generator", Ukrainian journal of physical optics, no. 16,№ 3: Institute of physical optics, pp. 111–119, 2015. Abstract
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Tawfik, A. M., "Hydraulic solutions of pipeline systems using artificial neural networks", Ain Shams Engineering Journal, vol. 14, issue 3, pp. 101896, 2023.
Tawfik, W., "High-power table-top white-light few-cycle laser generator", Ukrainian journal of physical optics, no. 16,№ 3: Institute of physical optics, pp. 111–119, 2015. Abstract
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Tawfik, W., "High-power table-top white-light few-cycle laser generator", Ukrainian journal of physical optics, issue 16,№ 3: Institute of physical optics, pp. 111-119, 2015. Abstract
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Tawfik, W., M. A. Harith, M. El Batanony, and S. El-Tayeb, "Human enamel in ancient (3400–1085 BC) and recent Egypt", Sci Echoes, vol. 7, pp. 28–38, 2006. Abstract
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Tawfik, W., "High-power table-top white-light few-cycle laser generator", Ukrainian Journal of Physical Optics, vol. 16, no. 3: Institute of Physical Optics, pp. 111-119, 2015. AbstractWebsite

We have achieved experimentally a generation of white-light few-cycle femtosecond laser pulses, using a neon-filled hollow-core fibre. The pulses observed by us are as short as 6.22 fs at the repetition rate of 1 kHz, when the input is characterized by the parameters 2.5 mJ and 33 fs. Pulse compression has been achieved using a supercontinuum produced in a static neon-filled hollow fibre, while a pair of chirped mirrors have compensated the dispersion. Our technique allows for directly tuning the pulse duration via changing the gas pressure, while maintaining near-transform-limited pulses with constant output energies and thus reducing the complications introduced by the chirped pulses. Using the measurements of the optical transmission of the fibre as a function of the gas pressure, we have testified a high enough throughput exceeding 60%. This demonstrates the successful compression that yields few-cycle femtosecond-long pulses, with a wide spectral bandwidth. The technique can be used when simultaneously exciting different states in complex molecules. © 2015, Institute of Physical Optics. All rights reserved.

Tawfik, A. - R., N. B. Alduweesh, Z. A. - H. Mohamed, A. RahmanSayedSultan, and H. A. A. El-Rahman, The histopathological effect of diclofenac potassium on maternal and fetal tissues, , 2020. pdf.pdf
Tawfik, W., M. A. Harith, M. El Batanony, and S. El-Tayeb, "Human enamel in ancient (3400-1085 BC) and recent Egypt", Science Echoes, vol. 7, pp. 28-38, 2006. Abstract
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Tawfik, W., M. A. Harith, M. El Batanony, and S. El-Tayeb, "Human enamel in ancient (3400–1085 BC) and recent Egypt", Science Echoes, vol. 7, pp. 28–38, 2006. Abstract
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Tawfic, S., S. Sayed, A. Nada, D. Manaa, and S. Shalaby, "High- Versus Low-Density Fractional Laser in the Treatment of Hypertrophic Postburn Scars: A Randomized Clinical Trial.", Dermatologic surgery : official publication for American Society for Dermatologic Surgery [et al.], 2019. Abstract

BACKGROUND: Fractional CO2 laser has been shown effective in improving pigmentation, pruritus, and tightness of hypertrophic burn scars. However, there is no consensus on the optimal treatment parameters.

OBJECTIVE: To compare effectiveness of different densities of fractional CO2 laser in the treatment of mature hypertrophic burn scars.

MATERIALS AND METHODS: The study included 25 patients, each with 3 or more mature hypertrophic burn scars. Scars were randomly assigned to treatment with low-, medium-, and high-density fractional CO2 laser. Each scar received 3 sessions of laser at 1-month interval. The degree of improvement was assessed clinically using Vancouver Scar Scale (VSS) and Patient and Observer Scar Assessment Scale (POSAS) scores, and histologically through evaluation of collagen (Masson's Trichrome stain) before and 1 month after end of therapy.

RESULTS: High-density parameters showed significant higher improvement in VSS and POSAS assessment scores (p-value < .001). Pliability and relief are the most improved parameters. Histopathological evaluation revealed a significant drop in the mean area percent of collagen in the 3 used parameters, with highest improvement with high-density laser treatment (p-value < .001).

CONCLUSION: High-density fractional CO2 laser treatment provides more improvement in burn scars both clinically and histopathologically.

Tammam, A. A. - E., A. A. A. Khalaf, A. R. Zaki, M. M. Khalifa, Marwa A Ibrahim, A. M. Mekkawy, R. E. Abdelrahman, A. Farghali, and P. A. Noshy, "Hesperidin protects rats' liver and kidney from oxidative damage and physiological disruption induced by nickel oxide nanoparticles.", Frontiers in physiology, vol. 13, pp. 912625, 2022. Abstract

Nickel oxide nanoparticles (NiO-NPs) have recently been utilized in various advanced industrial fields like lithium-ion micro batteries, nanofibers, electrochromic devices, and several biomedical applications. NiO-NPs are classified as extremely toxic substances as they can cause long-term harm to the environment and aquatic life. Moreover, frequent and prolonged exposure can affect human and animal health, causing skin allergies and major toxic consequences, such as hepatorenal toxicity. Hesperidin (HSP) has been proven to possess anti-inflammatory, antioxidant, and free radical scavenging activities. This study aimed to investigate the underlying protective mechanisms and effects of HSP against NiO-NPs-induced hepatorenal toxicities in rats. Forty male Wistar rats were randomly divided into four groups (n = 10 in each). The first group served as a Control group. For 8 weeks, the second group was administered NiO-NPs (100 mg/kg/day), and the third group was given HSP (100 mg/kg/day) oral gavage for both groups. The fourth group received NiO-NPs and HSP concurrently in the same oral daily doses and duration as the second and third groups. NiO-NPs administration revealed a significant increase in plasma biomarkers of nephrotoxicity (urea, creatinine) and hepatotoxicity (ALT, AST) in NiO-NPs group compared to Control group ( < 0.05). In addition, NiO-NPs administration resulted in a substantial increase in malondialdehyde levels with a significant drop in catalase activity and GSH content in Group II. Also, a significant decreased expression of Nrf-2 and Bcl-2 mRNA levels and upregulation of TNF-α, NF-kβ and BAX in the liver and kidney of NiO-NPs group were also detected. Histologically, the liver and kidney of rats of NiO-NPs group showed significant histopathological disturbances, with a substantial increase in the proliferating cell nuclear antigen (PCNA) positive hepatocytes and renal tubular cells in the NiO-NPs group compared to Control and HSP groups ( < 0.05). In contrast, concomitant administration of HSP with NiO-NPs in group IV showed a significant biochemical, histopathological, and immunohistochemical improvement compared to NiO-NPs group. Co-administration of HSP with NiO-NPs significantly ameliorated most of the NiO-NPs-induced hepatorenal toxicities in male rats.

Tammam, A. A. - E., A. A. A. Khalaf, A. R. Zaki, M. M. Khalifa, M. A. Ibrahim, A. M. Mekkawy, R. E. Abdelrahman, A. Farghali, and P. A. Noshy, "Hesperidin protects rats’ liver and kidney from oxidative damage and physiological disruption induced by nickel oxide nanoparticles", Frontiers in Physiology, vol. 13, 2022. AbstractWebsite

Background: Nickel oxide nanoparticles (NiO-NPs) have recently been utilized in various advanced industrial fields like lithium-ion micro batteries, nanofibers, electrochromic devices, and several biomedical applications. NiO-NPs are classified as extremely toxic substances as they can cause long-term harm to the environment and aquatic life. Moreover, frequent and prolonged exposure can affect human and animal health, causing skin allergies and major toxic consequences, such as hepatorenal toxicity. Hesperidin (HSP) has been proven to possess anti-inflammatory, antioxidant, and free radical scavenging activities.

Objective: This study aimed to investigate the underlying protective mechanisms and effects of HSP against NiO-NPs-induced hepatorenal toxicities in rats.

Materials and Methods: Forty male Wistar rats were randomly divided into four groups (n = 10 in each). The first group served as a Control group. For 8 weeks, the second group was administered NiO-NPs (100 mg/kg/day), and the third group was given HSP (100 mg/kg/day) via oral gavage for both groups. The fourth group received NiO-NPs and HSP concurrently in the same oral daily doses and duration as the second and third groups.

Results: NiO-NPs administration revealed a significant increase in plasma biomarkers of nephrotoxicity (urea, creatinine) and hepatotoxicity (ALT, AST) in NiO-NPs group compared to Control group (p < 0.05). In addition, NiO-NPs administration resulted in a substantial increase in malondialdehyde levels with a significant drop in catalase activity and GSH content in Group II. Also, a significant decreased expression of Nrf-2 and Bcl-2 mRNA levels and upregulation of TNF-α, NF-kβ and BAX in the liver and kidney of NiO-NPs group were also detected. Histologically, the liver and kidney of rats of NiO-NPs group showed significant histopathological disturbances, with a substantial increase in the proliferating cell nuclear antigen (PCNA) positive hepatocytes and renal tubular cells in the NiO-NPs group compared to Control and HSP groups (p < 0.05). In contrast, concomitant administration of HSP with NiO-NPs in group IV showed a significant biochemical, histopathological, and immunohistochemical improvement compared to NiO-NPs group.

Conclusion: Co-administration of HSP with NiO-NPs significantly ameliorated most of the NiO-NPs-induced hepatorenal toxicities in male rats.

Tammam, A. A. - E., A. A. A. Khalaf, A. R. Zaki, M. M. Khalifa, Marwa A Ibrahim, A. M. Mekkawy, R. E. Abdelrahman, A. Farghali, and P. A. Noshy, "Hesperidin protects rats' liver and kidney from oxidative damage and physiological disruption induced by nickel oxide nanoparticles.", Frontiers in physiology, vol. 13, pp. 912625, 2022. Abstract

Nickel oxide nanoparticles (NiO-NPs) have recently been utilized in various advanced industrial fields like lithium-ion micro batteries, nanofibers, electrochromic devices, and several biomedical applications. NiO-NPs are classified as extremely toxic substances as they can cause long-term harm to the environment and aquatic life. Moreover, frequent and prolonged exposure can affect human and animal health, causing skin allergies and major toxic consequences, such as hepatorenal toxicity. Hesperidin (HSP) has been proven to possess anti-inflammatory, antioxidant, and free radical scavenging activities. This study aimed to investigate the underlying protective mechanisms and effects of HSP against NiO-NPs-induced hepatorenal toxicities in rats. Forty male Wistar rats were randomly divided into four groups (n = 10 in each). The first group served as a Control group. For 8 weeks, the second group was administered NiO-NPs (100 mg/kg/day), and the third group was given HSP (100 mg/kg/day) oral gavage for both groups. The fourth group received NiO-NPs and HSP concurrently in the same oral daily doses and duration as the second and third groups. NiO-NPs administration revealed a significant increase in plasma biomarkers of nephrotoxicity (urea, creatinine) and hepatotoxicity (ALT, AST) in NiO-NPs group compared to Control group ( < 0.05). In addition, NiO-NPs administration resulted in a substantial increase in malondialdehyde levels with a significant drop in catalase activity and GSH content in Group II. Also, a significant decreased expression of Nrf-2 and Bcl-2 mRNA levels and upregulation of TNF-α, NF-kβ and BAX in the liver and kidney of NiO-NPs group were also detected. Histologically, the liver and kidney of rats of NiO-NPs group showed significant histopathological disturbances, with a substantial increase in the proliferating cell nuclear antigen (PCNA) positive hepatocytes and renal tubular cells in the NiO-NPs group compared to Control and HSP groups ( < 0.05). In contrast, concomitant administration of HSP with NiO-NPs in group IV showed a significant biochemical, histopathological, and immunohistochemical improvement compared to NiO-NPs group. Co-administration of HSP with NiO-NPs significantly ameliorated most of the NiO-NPs-induced hepatorenal toxicities in male rats.

Tammam, A. A. - E., A. A. A. Khalaf, A. R. Zaki, M. M. Khalifa, Marwa A Ibrahim, A. M. Mekkawy, R. E. Abdelrahman, A. Farghali, and P. A. Noshy, "Hesperidin protects rats’ liver and kidney from oxidative damage and physiological disruption induced by nickel oxide nanoparticles", Frontiers in Physiology, vol. 10.3389, issue 912625, 2022.
Taher, E. M., and C. R. Mapengo, "High-Pressure Processing of Meat, Fish, and Poultry Products", Non-Thermal Processing Technologies for the Meat, Fish, and Poultry Industries: CRC Press, 2023.
Taher, A. N., "Head and Neck Cancer: Closer Look at Patients Quality of Life", Journal of Cancer Therapy, vol. 7, pp. 121-128, 2016. hn_cancer_closer_look.pdf
Taher, M., F. M. Hassan, M. O. EI-Shazly, B. A. M. Khairy, and 1.A., "Histopathological response of pulp tissue to calcium and zinc oxide (Eugenol) cavity liners.", J.Egyp. Vet. Med. Assoc., vol. 44, pp. 29, 1984. Abstract
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Taha, M. H. N., G. Manogaran, M. H. N. Taha, and N. E. M.Khalifa, "A hybrid deep transfer learning model with machine learning methods for face mask detection in the era of the COVID-19 pandemic", Measurement, vol. 167, 2021. Abstract

The coronavirus COVID-19 pandemic is causing a global health crisis. One of the effective protection methods is wearing a face mask in public areas according to the World Health Organization (WHO). In this paper, a hybrid model using deep and classical machine learning for face mask detection will be presented. The proposed model consists of two components. The first component is designed for feature extraction using Resnet50. While the second component is designed for the classification process of face masks using decision trees, Support Vector Machine (SVM), and ensemble algorithm. Three face masked datasets have been selected for investigation. The Three datasets are the Real-World Masked Face Dataset (RMFD), the Simulated Masked Face Dataset (SMFD), and the Labeled Faces in the Wild (LFW). The SVM classifier achieved 99.64% testing accuracy in RMFD. In SMFD, it achieved 99.49%, while in LFW, it achieved 100% testing accuracy.

Taha, E. H., "Harmonic Finsler manifolds of (α, β)-type", Balkan J. Geom. Appl. , vol. 27, pp. 138-143, 2022.
Taha, S. H., A. A. M. El-Fattah, A. A. El-Nimer, S. A. Nada, and J. M. Kassem, "Hepatoprotective and antioxidant action of whey protein and its fractions in rats after acute CCl4 exposure", J. Agric. Sci., Mansoura Univ., vol. 32, no. 7, pp. 5533, 2007. Abstract
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Taha, M. M., H. A. Abdeen, and R. A. Abdelsamaia, "High Intensity Interval Versus Continuous Moderate Aerobic Training as a Prophylaxsis of Diabetic Nephropathy", International Journal of Diabetes Research , vol. 5, issue (1), pp. 14-19, 2016. 10.5923.j.diabetes.20160501.03.pdf
TAHA, O. M. A. R. A., A. L. A. A. BARAKAT, H. k.AbdelHakim, M. A. Shemis, and Z. A. I. N. A. B. ZAKARIA, "Hypolipidimic and anti-fatty liver effects exerted by standardized punica granatum L.peel extract in HEPG2 cell-line and high fat diet induced mice", International journal of pharmacy and pharmaceutical science , vol. 8, issue 6, pp. 156-161, 2016. 11226-42912-2-pb.pdf
Taha, H. M., O. Abdel-Ghaffar, M. Badaway, and A. Hamza, "Hematological changes associated with chronic administration of furosemide in albino rats", Journal of Egyptian German Society of Zoology, vol. 12, issue A, pp. 239-260, 1993.
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