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Youssri, E., A. Dakrory, and A. Abu-Taira, Development Of Bubulcus Ibis Sense Organs, , 2014.
Youssri, Y. H., and A. G. Atta, "Double Tchebyshev Spectral Tau Algorithm for Solving KdV Equation, with Soliton Application", Encyclopedia of Complexity and Systems Science: Springer, Berlin, Heidelberg, pp. 451–467, 2022. Abstract
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Youssef, R. M., D. Mahgoub, H. M. Mashaly, E. El-Nabarawy, N. Samir, and M. El-Mofty, "Different narrowband UVB dosage regimens in dark skinned psoriatics: a preliminary study.", Photodermatology, photoimmunology & photomedicine, vol. 24, issue 5, pp. 256-9, 2008. Abstract

BACKGROUND: Psoriasis is a common and relapsing disease, which is both physically and psychologically disabling. Narrowband UVB (NB-UVB) is used in fair-skinned population in suberythemogenic doses with good results; however, in the darker skin population (skin types III, IV, V) erythemogenic doses have not been thoroughly investigated.

AIM: A left-right bilateral comparative trial was carried out to compare the suberythemogenic dose of NB-UVB vs. erythemogenic dose in the treatment of dark-skinned psoriatic patients.

PATIENTS AND METHODS: The study was conducted on 20 patients with chronic plaque psoriasis. The left side was treated with the dose causing minimal erythema [100% of minimal erythema dose (MED)] while the right side received 70% of this MED (suberythemogenic side).

RESULTS: Our results revealed no statistically significant difference in PASI final and in the percentage of reduction of PASI score between both sides as well as the total number of sessions (P-value>0.05), while the total cumulative UVB dose on the suberythemogenic side was significantly lower (P-value<0.001).

CONCLUSION: Our study recommends reducing the dose regimen of NB-UVB and consequently the cumulative UVB dose by using the suberythemogenic dosing schedule even in dark skin population.

Youssef, A. H., M. R. Abonazel, and O. A. Shalaby, "Determinants of Per Capita Personal Income in U.S. States: Spatial Fixed Effects Panel Data Modeling", Journal of Advanced Research in Applied Mathematics and Statistics, vol. 5, issue 1, pp. 1-13, 2020. Abstractdeterminants__of__per__capita__personal__income.pdf

Over the last decades, the Per Capita Personal Income (PCPI) variable was a common measure of the effectiveness of economic development policy. Therefore, this paper is an attempt to investigate the determinants of personal income by using spatial panel data models for 48 U.S. states during the period from 2009 to 2017. We utilize the three following models: spatial autoregressive (SAR) model, Spatial Error (SEM) Model, and Spatial Autoregressive Combined (SAC) model, with individual (or spatial) fixe deffects according to three different known methods for constructing spatial weights matrices: binary contiguity, inverse distance, and Gaussian transformation spatial weights matrix. Additionally, we pay attention for direct and indirect effects estimates of the explanatory variables for SAR, SEM, and SAC models. The second objective of this paper is to show how to select the appropriate model to fit our data.
The results indicate that the three used spatial weights matrices provide the same result based on goodness of fit criteria, and the SAC model is the most appropriate model among the models presented. However, the SAC model with spatial weights matrix based on inverse distance is better compared to other used models. Also, the results indicate that percentage of individuals with graduate or professional degree, real Gross Domestic Product (GDP) per capita,and number of nonfarm jobs have a positive impact on the PCPI, while the percentage of individuals without degree or bachelor’s degree have a negative impact on the PCPI.

Youssef, S. M., M. A. Soliman, M. A. Saleh, A. H. Elsayed, and A. G. Radwan, "Design and control of soft biomimetic pangasius fish robot using fin ray effect and reinforcement learning", Scientific Reports, vol. 12, issue 1: Nature Publishing Group UK London, pp. 21861, 2022. Abstract
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Youssef, R. M., D. Mahgoub, H. M. Mashaly, E. El-Nabarawy, N. Samir, and M. El-Mofty, "Different narrowband UVB dosage regimens in dark skinned psoriatics: a preliminary study", Photodermatology, photoimmunology & photomedicine, vol. 24, no. 5: Wiley Online Library, pp. 256–259, 2008. Abstract
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Youssef, H. M., M. Allam, F. Boussora, and M. M. T. S. Axel Himmelbach, Sara G. Milner, "Dissecting the Genetic Basis of Lateral and Central Spikelet Development and Grain Traits in Intermedium-Spike Barley (Hordeum vulgare Convar. Intermedium)", Plants, vol. 9, issue 12, pp. 1655, 2020.
Youssef, R., O. Shaker, S. Sobeih, H. Mashaly, and W. Z. Mostafa, "Detection of herpes simplex virus DNA in serum and oral secretions during acute recurrent herpes labialis", Journal of dermatology, vol. 29, no. 7: JAPANESE DERMATOLOGICAL ASSOC, pp. 404–410, 2002. Abstract
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Youssef, M., E. Chong, and K. Phang, "Distortion analysis using signal flow graphs and Volterra series", 2003 46th Midwest Symposium on Circuits and Systems, vol. 1, pp. 84 - 89 Vol. 1, 27-30 Dec. 2003. Abstract

This paper describes a graphical method of nonlinear circuit analysis. The method combines circuit analysis using driving-point impedances and signal flow graphs with distortion analysis using the Volterra series. The result is a method of distortion analysis which is more intuitive and flexible than traditional methods. The method is demonstrated in the analysis of a common-emitter amplifier in which the second- and third-order harmonic distortion ratios are determined. The method is also applied to comparing the distortion of different voltage buffer circuits based on an emitter follower and on a differential pair with unity gain feedback

Youssef, R. H. A. A., N. G. E. -din El-Rashidi, S. M. Khairat, M. M. Gaafar, M. A. H. Elnady, M. M. Balah, and N. S. Soliman, "Detection of Mycobacterium tuberculosis and drug resistance by GeneXpert® MTB/RIF and Anyplex™ II MTB/MDR in a tertiary care hospital ", Medical Science, vol. 24, issue 105, 2020.
Youssef, M. A., M. E. Meshaly, and A. A. Elansary, "Ductile corrosion-free GFRP-stainless steel reinforced concrete elements", Composite Structures, vol. 182, pp. 124-131, 2017.
Youssef, A., M. A. Abdel-Fattah, A. O. Touny, Z. K. Hassan, A. Nassar, M. M. Lotfy, A. Moustafa, M. M. Eldin, A. Bahnassy, and A. - R. N. Zekri, Deep Next Generation Sequencing Identifies Somatic Mutational Signature in Egyptian Colorectal Cancer Patients, , 2020. Abstract
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Youssef, A., Y. M. Issa, O. R. Shehab, and H. Sherief, "Determination of Microgram Amounts of Copper in Real Samples Using New Modified Carbon Paste Electrode", Inter. J. Electrochem. Sci.,, vol. 10, pp. 4752-4769, 2015.
Youssef, A. S. E. - D., A. R. N. Zekri, M. Mohanad, S. A. Loutfy, N. F. Abdel Fattah, M. H. Elberry, A. A. El Leithy, A. El-Touny, A. S. Rabie, M. Shalaby, et al., "Deleterious and ethnic-related BRCA1/2 mutations in tissue and blood of Egyptian colorectal cancer patients and its correlation with human papillomavirus.", Clinical and experimental medicine, vol. 23, issue 8, pp. 5063-5088, 2023. Abstract

This study aimed to identify BRCA1/2 mutational patterns in the tissue and blood of Egyptian colorectal cancer (CRC) patients and to study the possible correlation of this mutational pattern with Human papillomavirus (HPV) infection. Eighty-two colonoscopic biopsies and forty-six blood samples were collected from Egyptian CRC patients, as well as blood samples of age and sex-matched healthy controls (n = 43) were enrolled. The libraries were performed using Qiaseq Human BRCA1 and BRCA2 targeted DNA panel and sequenced via Ion proton sequencer. Also, the CRC tissues were subjected to conventional PCR targeting the HPV Late 1 (L1) region. Our analysis revealed that the BRCA-DNA damage pathway had been altered in more than 65% of the CRC patients. Comparing tissue and blood samples from CRC patients, 25 somatic mutations were found exclusively in tissue, while 41 germline mutations were found exclusively in blood. Additionally, we identified 23 shared BRCA1/2 pathogenic (PVs) mutations in both blood and tissue samples, with a significantly higher frequency in blood samples compared to tissue samples. The most affected exon in BRCA1 was exon 10, while the most affected exons in BRCA2 were 11, 14, 18, 24, and 27 exons. Notably, we revealed an ethnic-related cluster of polymorphism variants in our population closely related to South Asian and African ethnicities. Novel PVs were identified and submitted to the ClinVar database. HPV was found in 23.8% of the CRC tissues, and 54% of HPV-positive cases had somatic BRCA1/2 PVs. The results of this research point to a possible connection between infection with HPV and BRCA1/2 mutations in the occurrence of colorectal cancer in the Egyptian population, which has a mixed ethnic background. Our data also indicate that liquid biopsy (blood samples) may be more representative than tissue samples for detecting BRCA1/2 mutations. These findings may have implications for cancer screening and the development of personalized, targeted therapies, such as PARP inhibitors, which can effectively target BRCA1/2 mutations.

Youssef, N., H. N. Deif, M. Hashad, M. El-Hariri, and K. Al-Amry, "Diagnostic Potential of GeneXpert MTB/RIF Assay for Mycobacterium bovis Infection in Bovine: A Retrospective Study", Egyptian Journal of Veterinary Sciences, vol. 55, issue 2, pp. 467-472, 2023.
Youssef, F. S., R. M. Labib, A. A. Sleem, and K. M. Meselhy, "Discrimination of Vitis vinifera varieties using DNA fingerprinting and NMR coupled with chemometrics and their impact on the efficacy of fluoxetine and indomethacin in vivo", Journal of Food Processing and Preservation,, vol. 45, issue 6, pp. 1-10(e15500), 2021.
Youssef, A. S. E. - D., A. R. N. Zekri, M. Mohanad, S. A. Loutfy, N. F. Abdel Fattah, M. H. Elberry, A. A. El Leithy, A. El-Touny, A. S. Rabie, M. Shalaby, et al., "Deleterious and ethnic-related BRCA1/2 mutations in tissue and blood of Egyptian colorectal cancer patients and its correlation with human papillomavirus.", Clinical and experimental medicine, vol. 23, issue 8, pp. 5063-5088, 2023. Abstract

This study aimed to identify BRCA1/2 mutational patterns in the tissue and blood of Egyptian colorectal cancer (CRC) patients and to study the possible correlation of this mutational pattern with Human papillomavirus (HPV) infection. Eighty-two colonoscopic biopsies and forty-six blood samples were collected from Egyptian CRC patients, as well as blood samples of age and sex-matched healthy controls (n = 43) were enrolled. The libraries were performed using Qiaseq Human BRCA1 and BRCA2 targeted DNA panel and sequenced via Ion proton sequencer. Also, the CRC tissues were subjected to conventional PCR targeting the HPV Late 1 (L1) region. Our analysis revealed that the BRCA-DNA damage pathway had been altered in more than 65% of the CRC patients. Comparing tissue and blood samples from CRC patients, 25 somatic mutations were found exclusively in tissue, while 41 germline mutations were found exclusively in blood. Additionally, we identified 23 shared BRCA1/2 pathogenic (PVs) mutations in both blood and tissue samples, with a significantly higher frequency in blood samples compared to tissue samples. The most affected exon in BRCA1 was exon 10, while the most affected exons in BRCA2 were 11, 14, 18, 24, and 27 exons. Notably, we revealed an ethnic-related cluster of polymorphism variants in our population closely related to South Asian and African ethnicities. Novel PVs were identified and submitted to the ClinVar database. HPV was found in 23.8% of the CRC tissues, and 54% of HPV-positive cases had somatic BRCA1/2 PVs. The results of this research point to a possible connection between infection with HPV and BRCA1/2 mutations in the occurrence of colorectal cancer in the Egyptian population, which has a mixed ethnic background. Our data also indicate that liquid biopsy (blood samples) may be more representative than tissue samples for detecting BRCA1/2 mutations. These findings may have implications for cancer screening and the development of personalized, targeted therapies, such as PARP inhibitors, which can effectively target BRCA1/2 mutations.

Youssef, R. M., D. Mahgoub, H. M. Mashaly, E. El-Nabarawy, N. Samir, and M. El-Mofty, "Different narrowband UVB dosage regimens in dark skinned psoriatics: a preliminary study", Photodermatology, photoimmunology & photomedicine, vol. 24, no. 5: Wiley Online Library, pp. 256–259, 2008. Abstract
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Youssef, M. M. G., D. Cameron, S. Olsen, and D. Ferguson, "Does axillary lymph node dissection impact survival in patients with breast cancer and isolated tumour cells or micrometastasis in sentinel node?", European journal of cancer (Oxford, England : 1990), vol. 75, pp. 167-168, 2017 Feb 21.
Youssef, A. S., H. Parkman, and S. Nagar, "Domperidone interacts with pioglitazone but not with ondansetron via common CYP metabolism in vitro.", Xenobiotica, vol. 44, issue 9, pp. 792-803, 2014.
Youssef, B., S. Khattab, T. A. Mageed, N. Hamdy, and S. ElGama, "DNA-based Key Generation and Exchange", Scientific Journal of Computer Science , vol. 38, issue 6/2001, pp. 16, 2011.
Youssef, A. M. S., R. M. Faty, and M. M. Youssef, "Diazotization and Coupling Reactions of Ethyl 3-amino-1H-pyrazole-4-carboxylate; Synthesis of some Pyrazoloazines", Journal of the Korean Chemical Society, vol. 45, issue 5, pp. 448-453, 2001. 2001-korean.pdf
Youssef, S. M., M. A. Soliman, M. A. Saleh, A. H. Elsayed, and A. G. Radwan, Design and Control of Soft Biomimetic Pangasius Fish Robot Using Finray Actuator and Reinforcement Learning, , 2022. Abstract
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Youssef, A. S. E. - D., A. R. N. Zekri, M. Mohanad, S. A. Loutfy, N. F. Abdel Fattah, M. H. Elberry, A. A. El Leithy, A. El-Touny, A. S. Rabie, M. Shalaby, et al., "Deleterious and ethnic-related BRCA1/2 mutations in tissue and blood of Egyptian colorectal cancer patients and its correlation with human papillomavirus", Clinical and Experimental Medicine, vol. 23, no. 8: Springer International Publishing Cham, pp. 5063–5088, 2023. Abstract
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Youssef, A. R., The Development of Botulinum Type-A toxin Muscle Weakness Model of Osteoarthritis., , Calgary, AB, Canada, University of Calgary, 2010.