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Search Results: 1 - 10 of 686681 matches for " Emad A. S. Al-Dujaili "
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Sex-Role Orientation in Men Is Related to Salivary Testosterone Levels  [PDF]
Miriam J. Law Smith, Denis K. Deady, Martin A. Sharp, Emad A. S. Al-Dujaili
Journal of Behavioral and Brain Science (JBBS) , 2013, DOI: 10.4236/jbbs.2013.37054
Abstract: Previous research has implicated the involvement of androgens in sex-role orientation in males, from studies of 2nd to 4th digit ratio (a purported marker of prenatal testosterone). The present pilot study investigates the relationship between salivary testosterone levels and sex-role orientation using Bem Sex Role Inventory (BSRI) scores in adult males. Twenty-one males (aged 18-24) completed the BSRI and provided saliva samples for assay. BSRI Femininity scores were significantly negatively correlated with testosterone levels; the higher the Femininity scores, the lower the testosterone levels. There was no relation of BSRI Masculinity scores with testosterone levels. Our preliminary results add to the research suggesting that sex-role orientation in males may be partially related to underlying hormone levels.
Excess Maternal Salt Intake Produces Sex-Specific Hypertension in Offspring: Putative Roles for Kidney and Gastrointestinal Sodium Handling
Clint Gray, Emad A. Al-Dujaili, Alexander J. Sparrow, Sheila M. Gardiner, Jim Craigon, Simon J.M. Welham, David S. Gardner
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0072682
Abstract: Hypertension is common and contributes, via cardiovascular disease, towards a large proportion of adult deaths in the Western World. High salt intake leads to high blood pressure, even when occurring prior to birth – a mechanism purported to reside in altered kidney development and later function. Using a combination of in vitro and in vivo approaches we tested whether increased maternal salt intake influences fetal kidney development to render the adult individual more susceptible to salt retention and hypertension. We found that salt-loaded pregnant rat dams were hypernatraemic at day 20 gestation (147±5 vs. 128±5 mmoles/L). Increased extracellular salt impeded murine kidney development in vitro, but had little effect in vivo. Kidneys of the adult offspring had few structural or functional abnormalities, but male and female offspring were hypernatraemic (166±4 vs. 149±2 mmoles/L), with a marked increase in plasma corticosterone (e.g. male offspring; 11.9 [9.3–14.8] vs. 2.8 [2.0–8.3] nmol/L median [IQR]). Furthermore, adult male, but not female, offspring had higher mean arterial blood pressure (effect size, +16 [9–21] mm Hg; mean [95% C.I.]. With no clear indication that the kidneys of salt-exposed offspring retained more sodium per se, we conducted a preliminary investigation of their gastrointestinal electrolyte handling and found increased expression of proximal colon solute carrier family 9 (sodium/hydrogen exchanger), member 3 (SLC9A3) together with altered faecal characteristics and electrolyte handling, relative to control offspring. On the basis of these data we suggest that excess salt exposure, via maternal diet, at a vulnerable period of brain and gut development in the rat neonate lays the foundation for sustained increases in blood pressure later in life. Hence, our evidence further supports the argument that excess dietary salt should be avoided per se, particularly in the range of foods consumed by physiologically immature young.
Equilibrium and kinetic studies of cadmium(II) and lead(II) ions biosorption onto Ficus carcia leaves
Ahlam M Farhan, Ammar H Al-Dujaili and Akl M Awwad
International Journal of Industrial Chemistry , 2013, DOI: 10.1186/2228-5547-4-24
Abstract: Langmuir isotherm model provided a better fit with the experimental data than Freundlich model by high correlation coefficients R2. Kinetic studies showed that pseudo-second-order described the biosorption experimental data better than the pseudo-first-order kinetic model.
Volumetric Properties of Aqueous Solutions of Ethylene Glycols in the Temperature Range of 293.15–318.15?K
Omer El-Amin Ahmed Adam,Ammar Hani Al-Dujaili,Akl M. Awwad
ISRN Physical Chemistry , 2014, DOI: 10.1155/2014/639813
Abstract: Densities of aqueous solutions of Ethylene glycol (EG), diethylene glycol (DEG), and triethylene glycol (TEG) were measured at temperatures from 293.15 to 318.15?K and molalities ranging from 0.0488 to 0.5288?mol·kg?1. Volumes of all investigated solutions at a definite temperature were linearly dependent on the solute molality; from this dependence the partial molar volumes at infinite dilution were determined for all solutes. It was found that the partial molar volumes at infinite dilution were concentration independent and slightly increase with increasing temperature. The partial molar volumes at infinite dilution or the limiting apparent molar volumes of ethylene glycols were fitted to a linear equation with the number of oxyethylene groups ( ) in the solute molecule. From this equation a constant contribution of the terminal ( ) and the ( ) groups to the volumetric properties was obtained. The thermal expansion coefficient ( ) for all investigated solutions was calculated at temperatures from 293.15 to 318.15?K. The thermal expansion coefficients for all solutes increase with increasing temperature and molality. Values of ( ) were higher than the value of the thermal expansion coefficient of the pure water. 1. Introduction Mixing effects for thousands of chemical compounds and their mixtures used in industry are rather difficult to be known; hence, knowledge of thermodynamic properties such as densities, as well as excess molar volumes, , partial molar volumes, and apparent molar volumes of organic mixtures at various temperatures, is of great importance. Solvation of a solute in certain solvent and different types of interactions, solute-solvent and solvent-solvent interactions, are of great importance in physical chemistry [1]. Analysis of multicomponent liquid mixtures in terms of mole fraction or molality and their thermodynamic and volumetric properties are important for the design of industrial processes. These properties are also important in the search of models capable of correlating the molecular structure and macroscopic properties of liquids [2]. During the liquid mixture formation the changes of molecule interactions occur, and difference in the components packing becomes apparent. When there is developed hydrogen bond network in, at least, one of the solvents then the mixture properties change in a special way [3]. The physical properties of liquid mixtures are very important in understanding the nature of molecular interactions between the molecules of liquid mixtures. Such properties of liquid mixtures are useful in designing
Assessment of Heavy Metals Pollution in the Sediments of Euphrates River, Iraq  [PDF]
Emad A. Mohammad Salah, Tahseen A. Zaidan, Ahmed S. Al-Rawi
Journal of Water Resource and Protection (JWARP) , 2012, DOI: 10.4236/jwarp.2012.412117
Abstract: Fourteen bed sediments samples were collected from the Euphrates River in order to determine concentrations, seasonal, spatial and contamination assessment of heavy metals such as Pb, Cd, Zn, Cu, Ni, Co, Fe, Mn and Cr. The mean concentrations are as follows: 2249.47 mg/kg for Fe, 228.18 mg/kg for Mn, 67.08 mg/kg for Ni, 58.4 mg/kg for Cr, 48.00 mg/kg for Zn, 28.16 mg/kg for Co, 22.56 mg/kg for Pb, 18.91 mg/kg for Cu and 1.87 mg/kg for Cd. To assess metal contamination in sediments, sediment quality guidelines were applied. The mean concentration of Cd, Cu, Ni, Fe, Mn, and Cr exceeded the USEPA guideline. The metal contamination in the sediments was also evaluated by appling enrichment factor (EF), contamination factor (CF), geo-accumulation index (Igeo) and pollution load index (PLI). Based on enrichment factor (EF), the Euphrates River sediments have very high enrichment for Pb, extremely high for Cd, moderate for Zn, significant to very high for Ni, very high to extremely high for Co, moderate to significant for Mn and significant to very high for Cr. According to contamination factor (CF), Cd and Cr are responsible for very high contamination. According to Igeo, the Euphrates River sediments are moderately to strongly polluted by Cd. Based on PLI, all sampling sites suggest no overall pollution of site quality.
Instantaneous and Time-Overangle Protection Against Three-Phase Faults on Radial Electrical Power Systems
Saleh A. Al-Jufout,Emad S. Addasi
International Journal of Electrical and Power Engineering , 2012,
Abstract: This study presents, a theoretical approach to develop a digital protection method against 3-phase short circuits on radial electrical power systems that decreases the fault clearance time and thus, increases the stability of the system. The criterion used in this proposed, protection method is the inclination angle of the envelope of the short-circuit current. The concept of the current envelope has been introduced and its change during 3-phase faults has been analyzed. The inclination angle has been calculated and its use as a criterion for protection against 3-phase faults on radial electrical power systems has been discussed. The suggested protection method has been developed with the use of mathematical modelling of the radial electrical power system. The mathematical model has been represented as a system of differential equations for currents and a system of algebraic equations for bus voltages. This model has been formulated in a rectangular coordinate system and has been developed for both steady-state and transient analyses. The curves of the envelope of the short-circuit currents during the first 2 milliseconds after the fault instant and the time grading diagrams of the proposed protection method have been illustrated.
Life-threatening biopsy of an iliopsoas pseudotumour in a patient with haemophilia: a case report
Azan S Al Saadi, Ali H Al Wadan, Sami A El Hamarneh, Mohamed E Emad
Journal of Medical Case Reports , 2008, DOI: 10.1186/1752-1947-2-135
Abstract: Haemophilia A, an X-linked recessive bleeding disorder, is the most common severe type of inherited bleeding disorder, affecting 1 in 10,000 people. Although transmitted as a sex-linked disorder largely affecting males, it has been shown that 25% of all cases of haemophilia A arise by spontaneous mutation. The disorder is attributable to decreased blood levels of properly functioning procoagulant Factor VIII. The severity of the disease depends on the level of circulating clotting Factor VIII and is characterized by prolonged clotting time and partial thromboplastin time; the platelet count, platelet function tests and bleeding time are all within the normal range.The clinical presentation of the disease depends on the circulating levels of FactorVIII and is categorized as mild, moderate or severe. Patients with haemophilia A often give a history of skin bruising, joint swelling and unusual bleeding associated with minor trauma or surgical procedures. The disease, however, may remain undetected without such history. This paper describes such a case where there were no previous episodes of joint swelling or bleeding. The haemophilia remained undetected until a biopsy was performed from psoas muscle tumour. The aim of this paper is to stress the importance of proper history and investigation prior to any invasive procedure, even if it is minor.A 20-year-old male patient presented to our hospital in March 2005 with a six-month history of left leg pain, weakness and limping. On examination the thigh muscles were wasted, mainly the quadriceps, and the hip joint was flexed slightly with limitation of active movement in all directions. Magnetic resonance imaging (MRI) of the hip and pelvis showed a retroperitoneal mass (Figures 1 and 2), and the preliminary diagnosis was of a rhabdomyosarcoma, for which a Tru-cut biopsy was performed.Five days after the biopsy the patient presented to the casualty department with dizziness, abdominal pain and distension, having had one epi
Test-retest strength reliability of the Electronic Push/Pull Dynamometer (EPPD) in the measurement of the quadriceps and hamstring muscles on a new chair  [PDF]
Mikhled F. Maayah, Mohammad D. Al-Jarrah, Saad S. El Zahrani, Ali H. Alzahrani, Emad T. Ahmedv, Amr A. Abdel-Aziem, Gopichandran Lakshmanan, Nabeel A. Almawajdeh, Muhsen B. Alsufiany, Yaser O. M. Abu Asi
Open Journal of Internal Medicine (OJIM) , 2012, DOI: 10.4236/ojim.2012.22022
Abstract: Background: Test-retest strength reliability of the Electronic Push/Pull Dynamometer (EPPD) in the measurement of the extensor and flexor muscles on a new constructed chair. The objective of the study was to assess reliability of Electronic Push/Pull Dynamometer in the measurement of the knee flexion and extension at 90° and 60° on a new constructed chair. The aims of the author: To assess reliability of Electronic Push/Pull Dynamometer in the measurement of the knee flexion and extension at 90° and 60° on a new constructed chair. Design: A test-retest reliability study. Subjects: One hundred healthy students male and female (mean age, 21y). Methods: Maximum isometric strength of the quadriceps and hamstring muscle groups was measured using the EPPD were recorded at 60° and 90° for 3 trials on 2 occasions. Reliability was assessed with the Intraclass correlation coefficient (ICC), mean and standard deviation (SD) of measurements, and smallest real differences were calculated for the maximum and for the mean and work of the 3 repetitions. Results: Mean strength ranged from 50.44 kg for knee flexion to 55.76 kg for knee extension 50.44 kg to 61.98 kg at 90° hip flexion. Test-retest reliability Intraclass correlation coefficients (ICCs) ranged from 0.85 to 0.99. ICCs for test-retest reliability ranged from 0.780 to 0.998. Conclusions: The results of the reliability study indicate that the EPPD in reliable dynamometer to use in determining lower limb muscle force production. It can be used to measure disease progression and to evaluate changes in knee extension and flexion strength at the individual patient level.
Efficient Time/Frequency Permutation of MIMO-OFDM Systems through Independent and Correlated Nakagami Fading Channels  [PDF]
Khodr A. SAAIFAN, Emad K. AL-HUSSAINI
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2009, DOI: 10.4236/ijcns.2009.29105
Abstract: Space-Time Frequency (STF) codes for MIMO-OFDM over block-fading channel can achieve rate?? Mt and full-diversity Mt Mr Mb L which is the product of the number of transmit antennas Mt, receive antennas Mr, fading blocks Mb and channel taps L. In this article, time permutation is proposed to provide independent block-fading over Jake’s Doppler power spectrum channel. Moreover, we show the performance variations of STF code as channel delay spread changes. Therefore, we introduce a frequency/time permutation technique in order to remove the frequency correlation among sub-carriers, which subsequently increases the coding gain and achieves maximum diversity. Finally, the symbol error rate (SER) performance of the proposed time/frequency permuted STF codes over independent and correlated MIMO antenna branches under Nakagami fading channel is simulated. We show that the proposed systems provide better performance and more robust to large values of antennas correlation coefficients in comparison with the un-interleaved one.
Physico-Chemical Assessment of Euphrates Riverbetween Heet and Ramadi Cities, Iraq  [PDF]
Emad A. Al-Heety, Ahamed M. Turky, Eethar M. Al-Othman
Journal of Water Resource and Protection (JWARP) , 2011, DOI: 10.4236/jwarp.2011.311091
Abstract: The physico-chemical parameters of Euphrates River water were studied between Heet and Ramadi cities during November 2008 to June 2009. Water were samples collected from eleven stations and analyzed for Temperature, Turbidity, Electrical conductivity (EC), Total suspended solids (TSS), pH, Total dissolved salts (TDS), Dissolved oxygen (DO), Biochemical oxygen demand (BOD), Calcium, Potassium, Sodium, Sulphate, Phosphate, Bicarbonates, Chloride, Nitrate and Total hardness. The observed values of these physico-chemical parameters were compared with WHO standards. Some parameters (Turbidity, TSS, TDS, BOD, Calcium, Sodium and Total hardness) exceeded the permissible limits of WHO standards, while other parameters were within the permissible limits. Statistical studies have been carried out by calculating correlation coefficients between different pairs of parameters. Monthly and spatial variations of physico-chemical parameters were investigated.
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