Time filter

Source Type

Al-Shalaby N.A.,Kafr El Sheikh University | Gaber S.M.,Egyptian Russian University
AEU - International Journal of Electronics and Communications | Year: 2016

Linearly polarized transparent dielectric resonator antenna (TDRA) transmitarray is designed and investigated for 12. GHz applications. A parametric study on the effect of solar-cell position on the radiation characteristics of the TDRA transmitarray. The unit cell consists of two TDRAs arranged back-to-back with one on either side of a perfect transparent conducting ground plane. The waveguide model is used to calculate the required compensation phase of each cell in the transmitarray. The radiation characteristics of a 9. ×. 9 linearly polarized transparent transmitarray antenna are investigated in different positions of solar-cell with respect to the DRA. The peak gain is 20.22. dB with a 1-dB gain bandwidth is more than 2. GHz (16.67%) for the TDRA transmitarray without solar-cell. The solar-cell is integrated with TDRA transmitarray with different positions for small satellite applications. The radiation characteristics of the transmitarray are simulated and calculated using the finite integral technique (FIT). © 2016 Elsevier GmbH. Source

Barakat E.M.F.,Ain Shams University | El Wakeel L.M.,Ain Shams University | Hagag R.S.,Egyptian Russian University
World Journal of Gastroenterology | Year: 2013

AIM: To evaluate the safety, efficacy and tolerability of Nigella sativa (N. sativa) in patients with hepatitis C not eligible for interferon (IFN)-α. METHODS: Thirty patients with hepatitis C virus (HCV) infection, who were not eligible for IFN/ribavirin therapy, were included in the present study. Inclusion criteria included: patients with HCV with or without cirrhosis, who had a contraindication to IFN-α therapy, or had refused or had a financial constraint to IFN-α therapy. Exclusion criteria included: patients on IFN-α therapy, infection with hepatitis B or hepatitis I virus, hepatocellular carcinoma, other malignancies, major severe illness, or treatment non-compliance. Various parameters, including clinical parameters, complete blood count, liver function, renal function, plasma glucose, total antioxidant capacity (TAC), and polymerase chain reaction, were all assessed at baseline and at the end of the study. Clinical assessment included: hepato and/ or splenomegaly, jaundice, palmar erythema, flapping tremors, spider naevi, lower-limb edema, and ascites. N. sativa was administered for three successive months at a dose of (450 mg three times daily). Clinical response and incidence of adverse drug reactions were assessed initially, periodically, and at the end of the study. RESULTS: N. sativa administration significantly improved HCV viral load (380808.7 ± 610937 vs 147028.2 ± 475225.6, P = 0.001) and TAC (1.35 ± 0.5 vs 1.612 ± 0.56, P = 0.001). After N. sativa administration, the following laboratory parameters improved: total protein (7.1 ± 0.7 vs 7.5 ± 0.8, P = 0.001), albumin (3.5 ± 0.87 vs 3.69 ± 0.91, P = 0.008), red blood cell count (4.13 ± 0.9 vs 4.3 ± 0.9, P = 0.001), and platelet count (167.7 ± 91.2 vs 198.5 ± 103, P = 0.004). Fasting blood glucose (104.03 ± 43.42 vs 92.1 ± 31.34, P = 0.001) and postprandial blood glucose (143.67 ± 72.56 vs 112.1 ± 42.9, P = 0.001) were significantly decreased in both diabetic and non-diabetic HCV patients. Patients with lower-limb edema decreased significantly from baseline compared with after treatment [16 (53.30%) vs 7 (23.30%), P = 0.004]. Adverse drug reactions were unremarkable except for a few cases of epigastric pain and hypoglycemia that did not affect patient compliance. CONCLUSION: N. sativa administration in patients with HCV was tolerable, safe, decreased viral load, and improved oxidative stress, clinical condition and glycemic control in diabetic patients. © 2013 Baishideng. All rights reserved. Source

Dweedar H.E.,Sadat City University | Mahrous H.,Sadat City University | Ibrahim H.S.,Egyptian Russian University | Abdel-Aziz H.A.,King Saud University | Abdel-Aziz H.A.,National Research Center of Egypt
European Journal of Medicinal Chemistry | Year: 2014

The docking studies on CDK2 and GSK-3β inspired us to synthesis a series of indoline-2,3-dione hydrazones 10a-l. Treatment of indoline-2,3-dione derivatives 7a-d with hydrazine gave 3-hydrazonoindolin-2-ones 8a-d which were reacted with the appropriate aldehydes 9a-c to yield 3-substituted- (methylenehydrazono)indolin-2-ones 10a-l. Compounds 10a-l showed a significant anticancer activity against human breast cell line MCF-7. Compounds 10c, f, i exhibited the highest activity almost the same of doxorubicin (IC50 = 6.10 μM) with IC50 = 7.75, 6.75, 6.25 μM, respectively. © 2014 Elsevier Masson SAS. All rights reserved. Source

Saeed A.,Egyptian Russian University | Elbashar Y.H.,Aswan University | El Kameesy S.U.,Ain Shams University
Research Journal of Pharmaceutical, Biological and Chemical Sciences | Year: 2015

Experimental studies of the optical band passes filter behavior of a new series of copper phosphate glasses have been carried out. The amorphous nature of the prepared samples was examined using XRD analysis. The effect of different contents of CuO on the thermal transition temperature (Tg) was investigated using differential thermal analysis (DTA). Density and its derivative parameters such as molar volume, copper ion concentration, and interionic distance have explored the effect of copper ions behave. The EPR spectra of copper phosphate glasses were measured at room temperature in order to examine the valance state of copper in the glass network. Finally, the optical filtering behavior of the prepared glasses was carried out using UV-Visible measurements. Optical band gap, Urbach energy, and refractive index, were studied to check the effect of Cu ion on the present glasses. Source

Haggag S.,Egyptian Russian University
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2016

The Senovilla family for a subclass of Petrov type-D stationary axisymmetric differentially rotating perfect fluids is considered. A scheme is presented to construct from a solution an interior of a rotating compact body satisfying dominant energy conditions and with a boundary of vanishing pressure. The equatorial disk of the body is a surface layer due to a jump in the second fundamental form. However, unlike previous results, the body is free from curvature singularities. © 2016 American Physical Society. Source

Discover hidden collaborations