Hazem Emam, Eman Ahmed, Mohamed M. Abdel‐Daim,
Tópico(s): Insect Pest Control Strategies
2018 - Springer Science+Business Media | Environmental Science and Pollution Research
Lamya H. Al-Wahaibi, Nandakumar Santhosh Kumar, Ali A. El‐Emam, Natarajan Sathiyamoorthy Venkataramanan, Hazem A. Ghabbour, Abdul-Malek S. Al-Tamimi, M. Judith Percino, Subbiah Thamotharan,
A combined study involving single crystal X-ray diffraction and various theoretical approaches has been used to characterize the 2-(4-fluorobenzylthio)-5-(5-bromothiophen-2-yl)-1,3,4-oxadiazole compound. The crystal structure is primarily stabilized by intermolecular CH···π, CH⋯N and CH⋯F. A short and very rare halogen-halogen contact (Br⋯F) which adopts type I trans geometry along with the S⋯S, N⋯S contacts, which play an important role in the stabilization of the crystal packing. The importance ...
Tópico(s): Synthesis and biological activity
2018 - Elsevier BV | Journal of Molecular Structure
Lamya H. Al-Wahaibi, Subramaniam Sujay, Gangadharan Ganesh Muthu, Ali A. El‐Emam, Natarajan Sathiyamoorthy Venkataramanan, Fatmah A. M. Al-Omary, Hazem A. Ghabbour, M. Judith Percino, Subbiah Thamotharan,
A detailed structural analysis of two adamantane derivatives namely, ethyl 2-[(Z)-1-(adamantan-1-yl)-3-(phenyl)isothioureido]acetate I and ethyl 2-[(Z)-1-(adamantan-1-yl)-3-(4-fluorophenyl)isothioureido]acetate II is carried out to understand the effect of fluorine substitution. The introduction of fluorine atom alters the crystal packing and is completely different from its parent compound. The fluorine substitution drastically reduced the intermolecular H⋯H contacts and this reduction is compensated ...
Tópico(s): Advanced Chemical Physics Studies
2018 - Elsevier BV | Journal of Molecular Structure
Mohamed S. Attia, Mohamed Y. Hassaballah, Mohab A. Abdelqawy, Mahmoud Emad-Eldin, Aya K. Farag, Ahmed Negida, Hazem S. Ghaith, Sherif E. Emam,
The nanotechnology approach has been recently adopted to provide more reliable, effective, controlled, and safe drug delivery systems. Nanostructured materials have gained great interest, including siliceous and carbonaceous nanoparticles. The effectiveness of mesoporous carbon nanoparticles (MCNs) in tumor imaging, targeting, and treatment is urging for more future studies. MCNs possess superior properties such as their biocompatibility, large surface area, large pore volume, tunability, and more ...
Tópico(s): Carbon Nanotubes in Composites
2021 - Taylor & Francis | Drug Development and Industrial Pharmacy
Reem I. Al-Wabli, Nada A. El-Emam, Hazem A. Ghabbour, Nadia G. Haress, Ali A. El‐Emam,
Abstract C 20 H 22 F 3 N 3 OS, monoclinic, P 2 1 / c (no. 14), a = 13.1987(5) Å, b = 10.2772(4) Å, c = 14.1730(6) Å, β = 92.655(2)°, V = 1920.44(13) Å 3 , Z = 4, R gt (F) = 0.0536, wR ref (F 2 ) = 0.1612, T = 100 K.
Tópico(s): Crystal structures of chemical compounds
2016 - De Gruyter | Zeitschrift für Kristallographie - New Crystal Structures
Nourah Z. Alzoman, Ali A. El‐Emam, Hazem A. Ghabbour, C. S. Chidan Kumar, Hoong‐Kun Fun,
In the title mol-ecule, C18H19BrN2O, the benzene ring is inclined to the oxa-diazole ring by 10.44 (8)°. In the crystal, C-H⋯π inter-actions link the mol-ecules in a head-to-tail fashion, forming chains extending along the c-axis direction. The chains are further connected by π-π stacking inter-actions, with centroid-centroid distances of 3.6385 (7) Å, forming layers parallel to the bc plane.
Tópico(s): Structural and Chemical Analysis of Organic and Inorganic Compounds
2014 - International Union of Crystallography | Acta Crystallographica Section E Structure Reports Online
Lamya H. Al-Wahaibi, Hanan M. Hassan, Amal Abo-Kamar, Hazem A. Ghabbour, Ali A. El‐Emam,
A new series of adamantane-isothiourea hybrid derivatives, namely 4-arylmethyl (Z)-N′-(adamantan-1-yl)-morpholine-4-carbothioimidates 7a–e and 4-arylmethyl (Z)-N′-(adamantan-1-yl)-4-phenylpiperazine-1-carbothioimidates 8a–e were prepared via the reaction of N-(adamantan-1-yl)morpholine-4-carbothioamide 5 and N-(adamantan-1-yl)-4-phenylpiperazine-1-carbothioamide 6 with benzyl or substituted benzyl bromides, in acetone, in the presence of anhydrous potassium carbonate. The structures of the synthesized ...
Tópico(s): Eicosanoids and Hypertension Pharmacology
2017 - Multidisciplinary Digital Publishing Institute | Molecules
Kamal Abou Elmagd, Ashraf Emam, Mohamed W. Ali‐Bik, Muhammad Hazem,
Tópico(s): Groundwater and Isotope Geochemistry
2018 - Springer Science+Business Media | Arabian Journal of Geosciences
Ali A. El‐Emam, Hazem A. Ghabbour, Omar A. Al‐Deeb, Mohammed S. M. Abdelbaky, Santiago García‐Granda,
Abstract C 16 H 16 FN 3 OS, triclinic, P 1̅ (no. 2), a = 5.6885(3) Å, b = 9.4378(4) Å, c = 15.0736(7) Å, α = 84.037(4)°, β = 81.442(4)°, γ = 74.271(4)°, V = 768.56(7) Å 3 , Z = 2, R gt (F) = 0.0518, wR ref (F 2 ) = 0.1430, T = 100 K.
Tópico(s): Multicomponent Synthesis of Heterocycles
2016 - De Gruyter | Zeitschrift für Kristallographie - New Crystal Structures
Fatmah A. M. Al-Omary, Ali A. El‐Emam, Hazem A. Ghabbour, C. S. Chidan Kumar, Ching Kheng Quah, Hoong‐Kun Fun,
The title 1,3,4-oxadiazole-2-thione derivative, C 18 H 20 N 4 OS 2 , crystallized with two independent molecules ( A and B ) in the asymmetric unit. The 2-thienyl rings in both molecules are rotationally disordered over two orientations by approximately 180° about the single C—C bond that connects it to the oxadiazole thione ring; the ratios of site occupancies for the major and minor components were fixed in the structure refinement at 0.8:0.2 and 0.9:0.1 in molecules A and B , respectively. The 1,3,4- ...
Tópico(s): Structural and Chemical Analysis of Organic and Inorganic Compounds
2015 - International Union of Crystallography | Acta Crystallographica Section E Crystallographic Communications
Ebtehal S. Al‐Abdullah, Ali A. El‐Emam, Hazem A. Ghabbour, Suchada Chantrapromma, Hoong‐Kun Fun,
In the asymmetric unit of the title adamantyl derivative, C(20)H(25)N(3)S, there are two crystallographic independent mol-ecules with slightly different conformations. In one mol-ecule, the whole benzyl group is disordered over two orientations with the refined site-occupancy ratio of 0.63 (2):0.37 (2). The dihedral angles between the 1,2,4-triazole and phenyl rings are 24.3 (8) (major component) and 25.8 (13)° (minor component) in the disordered mol-ecule, whereas the corresponding angle is 51.53 (16)° ...
Tópico(s): Fluorine in Organic Chemistry
2012 - International Union of Crystallography | Acta Crystallographica Section E Structure Reports Online
Ali A. El‐Emam, Nasser R. El‐Brollosy, Hazem A. Ghabbour, Ching Kheng Quah, Hoong‐Kun Fun,
In the title compound, C(14)H(21)N(3)S, the 1,2,4-triazole ring is nearly planar, with a maximum deviation of 0.003 (4) Å. In the crystal, mol-ecules are linked into inversion dimers by pairs of N-H⋯S hydrogen bonds.
Tópico(s): Synthesis and Characterization of Heterocyclic Compounds
2012 - International Union of Crystallography | Acta Crystallographica Section E Structure Reports Online
Hanan Al-Ghulikah, Akilandeswari Gopalan, Laxmi Priya Sathiya Vahisan, Mohamed A. Khalaf, Hazem A. Ghabbour, Ali A. El‐Emam, M. Judith Percino, Subbiah Thamotharan,
We report a detailed investigation of the weak noncovalent interactions exist in the crystal structure of the title benzo[b]thiophene derivative. It crystallizes in triclinic system with the centrosymmetric space group P-1. The planar conformation of the molecule is maintained by intramolecular 1,5-S···O chalcogen bond and N–H⋯O and C–H⋯O hydrogen bonding interactions. The crystal structure is primarily stabilized by C–H⋯S, C–H···π, C–H⋯O, Csp3–Br···OC, C–H⋯Br and Csp3–H···H–Csp3 interactions. The ...
Tópico(s): Structural and Chemical Analysis of Organic and Inorganic Compounds
2019 - Elsevier BV | Journal of Molecular Structure
Kamal Abou Elmagd, Ashraf Emam, Muhammad Hazem,
Tópico(s): Geochemistry and Geologic Mapping
2020 - Springer Science+Business Media | Arabian Journal of Geosciences
Ali A. El‐Emam, Mohamed A. Al‐Omar, Hazem A. Ghabbour, Hoong‐Kun Fun, Tze Shyang Chia,
In the title compound, C(14)H(13)N(3)OS(2), the thio-phene ring is disordered over two orientations by ca 180° about the C-C bond axis linking the ring to the rest of the mol-ecule, with a site-occupancy ratio of 0.651 (5):0.349 (5). The central 1,3,4-oxadiazole-2(3H)-thione ring forms dihedral angles of 9.2 (5), 4.6 (11) and 47.70 (7)° with the major and minor parts of the disordered thio-phene ring and the terminal phenyl ring, respectively. In the crystal, no significant inter-molecular hydrogen bonds ...
Tópico(s): Synthesis and Characterization of Heterocyclic Compounds
2012 - International Union of Crystallography | Acta Crystallographica Section E Structure Reports Online
Hazem Ali Attia, W. Abbas, Mostafa A. M. Abdeen, M.S. Emam,
In the present study, the unsteady flow with heat transfer of a viscous incompressible dusty fluid through a porous medium is studied. The parallel plates are assumed to be porous and subjected to a uniform suction from above and injection from below while the fluid is flowing through a porous medium that is assumed to obey Darcy’s law. The equations of motion are solved analytically to obtain the velocity distributions for both the fluid and dust particles. The energy equations for both the fluid ...
Tópico(s): Aerodynamics and Fluid Dynamics Research
2013 - Taylor & Francis | European Journal of Environmental and Civil engineering
Hazem A. Elbedewy, Tamer Wasfy, Shaimaa Soliman, Moataz Sabry, Amr Mahmoud Awara, Sharif El-Emam, Heba M. Shafik, Mostafa R. Alam,
Tópico(s): Corneal Surgery and Treatments
2018 - Springer Science+Business Media | International Ophthalmology
Hazem Hamza, Dina Nadeem Abd‐Elshafy, Sayed A. Fayed, Mahmoud Mohamed Bahgat, Nagwa El-Esnawy, Emam Abdel-Mobdy,
Tópico(s): Hepatitis Viruses Studies and Epidemiology
2017 - Springer Science+Business Media | Archives of Virology
R. Thandaiah Prabu, Judy Simon, Nellore Kapileswar, Dasari Naga Vinod, Phani Kumar Polasi, Hazem Hazem Ali Emam,
Abstract This study has clarified the four-wave mixing, average amplified spontaneous emission, and channel spacing effects on the optical transceiver systems based on multipumped Raman amplifiers. The employed spectral width is applied in the fiber core from 1450 nm to 1650 nm through the subgroups in the fiber link. The optical loss and fiber dispersion effects are demonstrated with the spectral wavelength band with different pumping levels. The optical loss is clarified in relation to different ...
Tópico(s): Advanced Optical Network Technologies
2024 - De Gruyter | Journal of Optical Communications
R. Thandaiah Prabu, Soman Shibu, Annalakshmi Thillaigovindan, G Charulatha, Nune Divya, Sundararaju Vijayakumar, Hazem Hazem Ali Emam,
Abstract This work has clarified the relative intensity noise management and thermal/shot noise control for high speed ultra high bandwidth fiber reach transmission performance. Total link losses variations are clarified against ambient temperature and relative refractive index difference variations at 1,550 nm wavelength, 20 km fiber link length, and 45 % fluoride dopant ratio inside the fiber material cable. Besides the total link losses variations are demonstrated versus fiber link length and relative ...
Tópico(s): Semiconductor Lasers and Optical Devices
2024 - De Gruyter | Journal of Optical Communications
Merna Hazem Saad Emam Mohamed Hilal, W. Elsayed, Adel Mohamad Alansary, Faten Zahran,
Abstract Background Regional anesthetic techniques are commonly used to facilitate pain control in pediatric surgical procedures. The most commonly used technique in pediatrics is caudal block. Urogenital surgeries are one of the most frequently performed surgical procedures in the pediatric population. Using optimal analgesic regimen provides safe and effective analgesia, reduce postoperative stress response and accelerate recovery from surgery. Aim of the Work to evaluate the analgesic effect ...
Tópico(s): Anesthesia and Neurotoxicity Research
2024 - Oxford University Press | QJM
R. Thandaiah Prabu, Josephine Pon Gloria Jeyaraj, Ramachandran Ashwini, Kavitha Balamurugan, Ramachandran Vidhya Muthulakshmi, A. Jayanthi, Hazem Hazem Ali Emam,
Abstract This study presented the possibility of the hybrid cooperation between continuous wave laser (CW) laser and vertical cavity surface emitting laser (VCSEL) laser operation performance signature for upgrading ultra high reach optical fiber systems. The total estimated lighted power spectrum configuration is simulated with wavelength ranges from 1.543 to 1.555 μm. Total estimated lighted power spectrum configuration is studied with spectral time variations. Total estimated lighted power spectrum ...
Tópico(s): Advanced Fiber Laser Technologies
2023 - De Gruyter | Journal of Optical Communications
Lamya H. Al-Wahaibi, Hanan M. Hassan, Amal Abo-Kamar, Hazem A. Ghabbour, Ali A. El‐Emam,
Abstract C 28 H 34 BrN 3 S, monoclinic, P 2 1 / c (no. 14), a = 10.4529(8) Å, b = 11.8724(10) Å, c = 21.3800(19) Å, β = 101.864(3)°, V = 2596.6(4) Å 3 , Z = 4, R gt ( F ) = 0.060, wR ref ( F 2 ) = 0.148, T = 296(2).
Tópico(s): Synthesis and Biological Evaluation
2017 - De Gruyter | Zeitschrift für Kristallographie - New Crystal Structures
Fatmah A. M. Al-Omary, Lamees S. Al-Rasheed, Hazem A. Ghabbour, Ali A. El‐Emam,
Abstract C 17 H 21 ClN 2 S, orthorhombic, Pca 2 1 (no. 29), a = 25.4796(11) Å, b = 6.7503(3) Å, c = 18.9971(9) Å, V = 3267.4(3) Å 3 , Z = 8, R gt ( F ) = 0.045, wR ref ( F 2 ) = 0.106, T = 293(2).
Tópico(s): Synthesis and Catalytic Reactions
2016 - De Gruyter | Zeitschrift für Kristallographie - New Crystal Structures
Fatmah A. M. Al-Omary, Hazem A. Ghabbour, Ali A. El‐Emam, C. S. Chidan Kumar, Hoong‐Kun Fun,
In the cation of the title salt, C11H17N2O(+)·C7H8ClN2O2 (-), the piperazine ring adopts a distorted chair conformation and contains a positively charged N atom with quaternary character. Its mean plane makes a dihedral angle of 42.36 (8)° with the phenyl ring of its 2-meth-oxy-phenyl substituent. The 2,4-dioxopyrimidin-1-ide anion is generated by deprotonation of the N atom at the 1-position of the pyrimidine-dione ring. Intra-molecular C-H⋯O hydrogen bonds generate S(6) ring motifs in both the cation ...
Tópico(s): Synthesis and Characterization of Heterocyclic Compounds
2014 - International Union of Crystallography | Acta Crystallographica Section E Structure Reports Online
Iman I. Salama, Samia M. Sami, Safaa Elserougy, Hanaa Emam, Somaia I Salama, Hazem A. Elhariri, Samia A. Hemeda, Amal I. Hassanain, Aida M. Abdel Mohsen, Walaa A. Fouad, Lobna A. El Etreby, Zeinab Nabil Ahmed Said,
Tópico(s): Vaccine Coverage and Hesitancy
2020 - Oman Medical Specialty Board | Oman Medical Journal
Kamal Abou Elmagd, Ashraf Emam, Muhammad Hazem, Maher I. El-Soughier,
Tópico(s): Geological and Geophysical Studies Worldwide
2021 - Springer Science+Business Media | Arabian Journal of Geosciences
Fatmah A. M. Al-Omary, Hazem A. Ghabbour, Ali A. El‐Emam, C. S. Chidan Kumar, Hoong‐Kun Fun,
The title compound, C19H23N3S, is a functionalized triazoline-3-thione derivative. The benzyl ring is almost normal to the planar 1,2,4-triazole ring (r.m.s. deviation = 0.007 Å) with a dihedral angle of 86.90 (7)°. In the crystal, molecules are linked by pairs of N-H⋯S hydrogen bonds, forming inversion dimers that enclose R 2 (2)(8) loops. The crystal packing is further stabilized by weak C-H⋯π inter-actions that link adjacent dimeric units into supra-molecular chains extending along the a-axis direction.
Tópico(s): Organic Chemistry Cycloaddition Reactions
2014 - International Union of Crystallography | Acta Crystallographica Section E Structure Reports Online
Elsharawy Kamal, Ahmed Musaad Abd El‐Fattah, Hazem Emam, Mohamed Kassem, Mohamed I. Elashry, Abd Elwahab M. Abd Elwahab, Ali Tawfik,
Esthesioneuroblastoma (ENB), also known as olfactory neuroblastoma, is a rare and aggressive malignant tumour of the nasal cavity and paranasal sinuses. This study was conducted to evaluate and analyse the outcomes of the combined modality regimen including surgery, radiotherapy and chemotherapy. From January 2001 to January 2012; in a retrospective analysis; 10 patients with ENB were treated in Mansoura University Hospitals at the Otolaryngology Department. Four patients were of Kadish stage B and ...
Tópico(s): Meningioma and schwannoma management
2013 - | Egyptian Journal of Ear Nose Throat and Allied Sciences
Noha M. Hazem, Wagdi Elkashef, Ibrahim M. El‐Sherbiny, Ahmed A. Emam, Dalia Shaalan, Mohamed Sobh,
Background:: Hepatocellular Carcinoma (HCC) is the fifth most frequent cancer worldwide with a low overall survival due to high metastasis and recurrence rates. The aim of this study is to assess and compare the possible anti-neoplastic effect of capsaicin and nanoformulated capsaicin on in vitro HCC human cell line HepG2. The source of the cell line, including when and from where it was obtained. Whether the cell line has recently been authenticated and by what method. Whether the cell line has ...
Tópico(s): Bioactive natural compounds
2020 - Bentham Science Publishers | Current Chemical Biology