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Search Results: 1 - 10 of 416993 matches for " Badawi M. Ali "
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Effect of Cu2+ Doping on Structural and Optical Properties of Synthetic Zn0.5CuxMg0.5-xFe2O4 (x = 0.0, 0.1, 0.2, 0.3, 0.4) Nano-Ferrites  [PDF]
Badawi M. Ali, Mohamed A. Siddig, Yousef A. Alsabah, Abdelrahman A. Elbadawi, Abdalrawf I. Ahmed
Advances in Nanoparticles (ANP) , 2018, DOI: 10.4236/anp.2018.71001
Abstract: The samples of Zn0.5CuxMg0.5-xFe2O4 nanoparticle ferrites, with x= 0.0, 0.1, 0.2, 0.3, 0.4 were successfully synthesised. Structural and optical properties were investigated by X-ray Diffraction (XRD), Fourier Transform Infrared spectros-copy (FTIR) and UV-visible spectroscopy. The structural studies showed that all the samples prepared through the Co-precipitation method was a single phase of a face-cantered-Cubic (FCC) spinel symmetry structures with space group (SG): Fd-3m. In the series Zn0.5CuxMg0.5-xFe2O4, the lattice parameter was found to be 8.382 ? for x = 0 and was found to increase with copper con-centration. The grain size obtained from the XRD data analyses was found to be in the range of 15.97 to 28.33 nm. The increased in the grain size may be due to the large ionic radius of Mg2+ (0.86 ?) compared with Cu2+ (0.73 ?). The FTIR spectroscopy confirmed the formation of spinel ferrite and showed the characteristics absorption bands around 580, 1112, 1382, 1682, 1632 and 2920 cm-1. The energy band gap was calculated for samples were found to be in the range 4.04 to 4.67 eV.
A Case of Diprosopia in Anomalus Cross-bred Bovine Calf
E. Hind Osman,M.N. Badawi,M.B. Musa,M. Hala Ali,M. Rabab Ahmed
Veterinary Research , 2012,
Abstract: A case of diprosopia is described in a cross-bred bovine calf. The animal was tetraophthalmus, tetraoteus and distomus. There were two heads, two brains, single spinal cord, single vertebral column and single trunk. The congenitally deformed animal had two heterogenic reproductive organs. The condition was associated with dystocia.
Alloyed CdTe0.6S0.4 Quantum Dots Sensitized TiO2 Electrodes for Photovoltaic Applications  [PDF]
Ali Badawi, Khalid Easawi, Najm Al-Hosiny, Said Abdallah
Materials Sciences and Applications (MSA) , 2014, DOI: 10.4236/msa.2014.51004
Abstract:

The photovoltaic performance of alloyed CdTe0.6S0.4 quantum dot sensitized solar cells (QDSSCs) is investigated. Fluorine doped Tin Oxide (FTO) substrates were coated with 20 nm-diameter TiO2 nanoparticles (NPs). Presynthesized colloidal solution of alloyed CdTe0.6S0.4 quantum dots (QDs) of 4.2 nm was deposited onto TiO2 NPs substrates using direct adsorption (DA) technique, by dipping for different times at ambient conditions. The FTO counter electrodes were coated with platinum, while the electrolyte containing I-/I-3 redox species was sandwiched between the two electrodes. Compared to pure CdTe QDs and CdS QDs, CdTe0.6S0.4 QDs showed better photovoltaic performance. The J-V characteristic curves of the assembled QDSSCs were measured at AM 1.5 simulated sunlight. The short current density (Jsc) and efficiency (η) increase with dipping time. At 24 h dipping time, the open-circuit photovoltage Voc, Jsc, fill factor (FF), and η

Clinically Relevant Assessment of the Variability of Glycemic Response and Its Affect on Surgical Site Infection Rates?  [PDF]
Ali Mahmood, Khaled I. El-Badawi, Theodor Asgeirsson, Vinay Gajula, Anthony J. Senagore
Surgical Science (SS) , 2014, DOI: 10.4236/ss.2014.53017
Abstract:

Purpose: Despite growing interest in perioperative glycemic control, little data existdefining the optimal value(s) to use to define appropriate glycemic management and the impact on the incidence of surgical site infection (SSI). The aim of this study was to assess variation in glycemic response and risk of SSI and hospital stay as defined by themaximum, minimum, and area under the curve for perioperative glucose in patients undergoing colectomy. We specifically used standard of care obtained glucose levels to reflect limitations of observations typically used to assess quality of care. Methods: All patients undergoing colectomy from 7/2007 to 6/2008 were assessed for the maximum and minimum levels of standard of care glucose levels, as well as area under the curve (AUC) for elevated glucose perioperatively. These were assessed for patients with and without SSI (SSI vs nSSI). Results: 183 consecutive patients were evaluated (22 diabetics). The incidence of SSI for the entire population was 17/183 (9.3%) without significant difference between the groups with respect to mean blood glucose level (SSI-136; nSSI-136). However, the SSI group had a higher maximum glucose level (SSI-194; nSSI 162; p < 0.05) and a lower minimum glucose level (SSI-100; nSSI 117; p < 0.05). Using AUCs for elevated glucose, there was no significant difference in the percentage of SSI patients with glucose > 110 mg/dl (SSI-59%; nSSI-62%) or glucose > 150 mg/dl (SSI 6%; nSSI 18%). Conclusions: The data demonstrate that patients with SSI have wider fluctuations inglycemic response compared to non-SSI when standard of care serum glucose levels wasreviewed. Therefore, quality program monitoring of glucose impact on SSI should focus on both maximum and minimum levels during the perioperative period to better define process improvement in colectomy patients.

Psychological and Social Health Status of Patients with Lung Diseases in Jordan  [PDF]
Ayman M. Hamdan-Mansour, Saleh N. Azzeghaiby, Diana H. Arabiat, Talal H. Al Badawi
Health (Health) , 2014, DOI: 10.4236/health.2014.611141
Abstract: Objective: The study aims to investigate the psychosocial health status of patients with pulmonary diseases in Jordan. Methods: A cross-sectional survey using 230 patients diagnosed with lung diseases from six major hospitals in Jordan used to collect data in regards to depressive symptoms, psychological distress, coping, life satisfaction, and perceived social support. Data were collected from Jan 2013 to May 2013. Results: About 50% of the patients reported moderate levels of ability to effectively cope with life situations, life satisfaction, psychological distress, and perceived social support from family, friends and others. About 29% of the patients reported that they had moderate to severe depressive symptoms. Depressive symptoms had significant and negative correlation with life satisfaction and perceived social support (r = ﹣0.21 to ﹣0.39, p < 0.001). Times of admissions (β = 2.72, p = 0.007), marital status (β = 2.63, p = 0.009), and life satisfaction (β = ﹣4.54, p ≤ 0.001) were the significant predictors of depressive symptoms. Conclusion: Health professionals need to screening for psychological disturbances for their patients. There should be integration between early detection of psychological disturbances and implementation of effective treatment plans.
Photoacoustic Study of CdS QDs for Application in Quantum-Dot-Sensitized Solar Cells
S. Abdallah,N. Al-Hosiny,Ali Badawi
Journal of Nanomaterials , 2012, DOI: 10.1155/2012/498286
Abstract: The optical properties and photovoltaic characterization of CdS quantum dots sensitized solar cells (QDSSCs) were studied. CdS QDs were prepared by the chemical solution deposition (CD) technique. Photoacoustic spectroscopy (PA) was employed to study the optical properties of the prepared samples. The sizes of the CdS QDs were estimated from transmission electron microscope (TEM) micrographs gives radii ranged from 1.57 to 1.92?nm. The current density-voltage (J-V) characteristic curves of the assembled QDSSCs were measured. Fluorine doped Tin Oxide (FTO) substrates were coated with 20?nm-diameter TiO2 nanoparticles (NPs). Presynthesized colloidal CdS quantum dots of different particles size were deposited on the TiO2-coated substrates using direct adsorption (DA) method. The FTO counter electrodes were coated with platinum, while the electroelectrolyte containing redox species was sandwiched between the two electrodes. The short current density ( ) and efficiency (η) increases as the particle size increases. The values of increases linearly with increasing the intensities of the sun light which indicates the greater sensitivity of the assembled cells. 1. Introduction During the last two decades, there has been a great interest in material sciences for studying semiconducting quantum dots, since many of their physicochemical properties are substantially different from analogous properties of macroscopic solids [1]. Due to quantum confinement effect, they show size dependent optical, thermal, electrical, and photoluminescence properties. Particularly, II-VI semiconductor nanoparticles are currently of great interests for their practical applications in a variety of optoelectronic devices such as, high efficiency thin film transistors, light-emitting diodes [2], electron-beam pumped lasers, and electroluminescent devices [3–8]. CdS quantum dots (QDs) have become a very attractive promising material for many specific applications in solar energy conversion. Special attention has been devoted to investigate the optical and thermal properties to enhance the performance of solar cell devices. Generally, the absorption spectra can be measured by the conventional transmitted intensity method however; samples should be sufficiently thin and have good quality surfaces by pretreatments. This requires samples to be placed in a matrix of transparent material which on the other hand would interfere with the measurements of thermal properties [8]. Photoacoustic (PA) technique is proved to be useful for investigating the optical absorption of opaque samples as well as
Obesity in Relation to Ovarian Response in IVF Treatment  [PDF]
Howaida Hashim, Mahmoud Gehad, Badawi Khalid, Fahad Al Salman, Samar Hassan, Afaf Felemban, Haya Al Fozan, M. Al Bugnah
Advances in Reproductive Sciences (ARSci) , 2018, DOI: 10.4236/arsci.2018.62005
Abstract: Introduction: The effect of Body Mass Index (BMI), which reflects the woman’s obesity, in IVF treatment cycle, remains unclear. In 1997, the World Health Organization (WHO) provided authoritative refinements to the over-weight terminology and BMI cutoffs [1]. Objective: To verify the relationship between BMI and ovarian response in IVF treatment cycle. Design: Retrospective study. Materials & Methods: The study includes 2625 IVF treatment cycles performed in our IVF center in the period of 4 years. Patients were divided into five groups using the WHO criteria according to their BMI [2]. Cancellation rate, mean last E2 before hCG administration, mean endometrial thickness, mean duration of stimulation, number of eggs retrieved, fertilization rate, pregnancy and abortion rates were analyzed. The unpaired t-test was used in statistical analysis. Results: There was statistically significant less mean oestradiol level prior to hCG, less endometrial thickness and less number of simulation days as BMI gets higher. In contrast, there was a positive relationship between cancellation rate and higher BMI except with BMI >39 which was not, possibly due to lower number of patients available. But if we look at the cause of cancellation, it was 100% due to insufficient number of follicles obtained for this group (BMI >39). Also, days of stimulation are significantly lower for the same group of patients in comparison with the other groups. Retrieval, fertilization and pregnancy rates were not significant between all groups. Abortion rate gets significantly higher as BMI increased. Conclusion: Overweight affects ovulation, if we consider the cause of cancellation being insufficient number of follicles reflects the poor response. The fertilization and pregnancy rate were not affected once oocytes retrieved. The reduction of weight is an important part of infertility treatment in obese women with regards to the ovarian response and abortion rate in IVF cycle.
Surface and antitumor activity of some novel metal-based cationic surfactants
Badawi A,Mohamed Mekawi,Mohamed M,Khowdairy M
Journal of Cancer Research and Therapeutics , 2007,
Abstract: The development of anticancer metal-based drugs was attempted by reacting dodecyl amine with selenious acid to produce a quaternary ammonium salt which was then converted to copper and cobalt cationic complexes via complexing the first compounds with copper (II) or cobalt (II) ions. The surface properties of these surfactants were investigated. The surface properties studied included critical micelle concentration (CMC), maximum surface excess (Γmax ), and minimum surface area (Amin ). Free energy of micellization ( G o mic ) and adsorption ( Go ads ) were calculated. Antitumor activity was tested by using Ehrlich ascites carcinoma (EAC) as a model system of mice cell tumor. The compounds were also tested in vitro on five human monolayer tumor cell lines: MCF 7 (breast carcinoma), HEPG 2 (liver carcinoma), U 251 (brain tumor), HCT116 (colon carcinoma), and H460 (lung carcinoma). FTIR spectra, elemental analysis, and H 1 NMR spectra were performed to insure the purity of the prepared compounds.
Structural Stability and Vibrational Analyses of Haloselenonyl Azides, XSeO2-NNN, where X is F, Cl, Br
Wolfgang F?rner,Hassan M. Badawi,Zaki S. Seddigi
International Journal of Molecular Sciences , 2005, DOI: 10.3390/i6090230
Abstract: The structural stability of haloselenonyl azides was investigated by quantum mechanical M?ller-Plesset perturbation theory of second order and density functional theory calculations. The 6-311+G** basis set was used to include polarization and diffuse functions in the calculations at the DFT-B3LYP level. The potential scans for the rotation of the -NNN rotor were calculated and found to be consistent with a single minimum that corresponds to a gauche conformation (-NNN moiety nearly eclipses one of the two selenonyl Se=O bonds) for the three halogens at ambient temperature. The structural parameters for the minima calculated by MP2 and DFT turned out to be very similar. The vibrational modes, infrared and Raman intensities as well as depolarization ratios were calculated at DFT-B3LYP/6-311+G** level for the three molecules in their gauche conformations. The potential energy distributions among symmetry coordinates of the normal modes of the molecules in their gauche conformation were then computed from normal coordinate analyses.
Effect of Caesarean Section (C.S) on Uterine Aerobic Bacteria and Post-Partum Period in Nubian Goats
S.A. Makawi,M.E. Badawi
Journal of Animal and Veterinary Advances , 2012,
Abstract: A total of 82 deep cervical swabs were collected from 10 post-parturient Nubian goats. Thirty eight of these swabs were from five Nubian goats which were kidded normally (control group) and 44 swabs were from post-parturient Caesarean sectioned Nubian goats (C.S group). Collection of the swabs, started from the second day after kidding till the goat came into the first observable heat. The bacteria isolated from swabs taken from the two groups of goats reached 104 species belonging to 10 different genera. They included Bacillus sp. Bordetella sp. Corynebacterium sp. Escherichia sp. Gemella sp. Klebsiella sp. Microccocus sp. Proteus sp. Staphylococcus sp. and Streptococcus sp. The organisms which were common between the two groups included: Bacillus cereus, Escherichia coli, Escherichia fergusonii, Staphylococcus chromogens and Streptococcus faecalis.It was noticed that four goats in the control group were free from aerobic bacteria as early as day 13 and only one goat continued to show these organisms till the occurrence of first oestrus post-partum. However, in the C.S group, four goats continued to host the organisms till the signs of oestrus were observed and only one goat was free from the organisms at day 21. Depending on these finding, the post-partum period in the normally kidded Nubian goats ranged between 13 - 36 days (23.4 8.46) and between 21-41 days (35 8.22) in the C.sectioned Nubian goats and the difference between the two groups was a significant (p< 0.05). It could be concluded from this study, that C.S. resulted in a significant prolongation of the post-partum period in the Nubian goats with a noticeable change in the aerobic uterine flora.
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