Pyar A.H.H.,Hadramout University of Science and Technology |
Pyar A.H.H.,AIMST University |
Peh K.K.,Universiti Sains Malaysia
Malaysian Journal of Microbiology | Year: 2016
Aims: The aim of the present work was to evaluate the effect of various cryoprotective agents on the survival of freezedried probiotic Lactobacillus rhamnosus. Methodology and results: Investigation was done on the viability and stability of probiotics L. rhamnosus. The effect of different cryoprotective agents (namely, sodium chloride, sucrose, dextran, sorbitol, monosodium glutamate, glycerol, skim milk and skim milk with malt extract) with modified De-Man Rogosa Sharpe (MMRS) medium were examined. Commercial De-Man Rogosa Sharpe (MRS) medium was proved to be more expensive than the modified MRS medium with relatively low yield of probiotics L. rhamnosus. Significantly high viable counts were achieved with monosodium glutamate, skim milk and skim milk with malt extract, with optimum concentration at 0.3% w/v. There was a reduction in cell viability at concentration above 0.5% w/v, which could be attributed to cell shrinkage associated with osmotic pressure changes. The cells were found to be stable at room temperature (28 °C) for eight weeks. A significant growth of probiotics was produced from skim milk. Conclusions: Modified MRS medium with skim milk is suggested for the remarkable growth and yield of probiotic lactobacilli.
Aram F.O.,Hadramout University of Science and Technology
Indian Journal of Surgery | Year: 2015
The objective of this study was to analyze the effectiveness, safety, quality of life, and the results of the treatment for second- and third-degree hemorrhoids using rubber band ligation (RBL). This is a retrospective study for 890 patients who came to outpatient clinic from August 2007 to March 2013; all underwent rubber band ligation using the Barron applicator on an outpatient basis for second- and third-degree internal symptomatic hemorrhoids. Data were collected from the patients’ files. The patients were asked to return to outpatient clinic for follow-up at 2 weeks and 1 and 6 months and by telephone call every 6 months for 2 years. Six hundred seventy-seven patients (76 %) were cured (P = 0.31). Symptomatic recurrence was detected in 178 cases (20 %) after 2 years. Thirty-five patients (4 %) had some complications from RBL, which required no hospitalization. The complications were pain, rectal bleeding, and vasovagal symptoms (2.6, 1, and 0.4 % of patients, respectively). Seven hundred fifty-six (85 %) of the patients are males; the mean age was 45 years (range, 16–86 years). RBL is a simple, safe, and effective method for treating symptomatic second- and third-degree hemorrhoids as an outpatient procedure with significant improvement in quality of life. © 2015 Association of Surgeons of India
Nassar M.M.,Minia University |
El-Geundi M.S.,Minia University |
Al-Wahbi A.A.,Hadramout University of Science and Technology
Desalination and Water Treatment | Year: 2012
The equilibrium modeling for adsorption of cationic dye Methylene Blue (MB) onto Yemen natural clay at different temperatures, particle size and solution pH was studied. The adsorption capacity was found to be increase with increasing temperature and pH and decreased with increasing particle size. The maximum adsorption capacity was 500.0 (mg g-1) at T = 25°C, dp = 250-355 μm and pH = 12. The data are successfully tested by Langmuir, Freundlich, Temkin and Redlich-Peterson models. It was found that the Redlich-Peterson isotherm best fit the experimental data over the whole concentration range. Thermodynamic parameters such as standard Gibbs free energy (ΔG°), standard enthalpy (ΔH°), and standard entropy (ΔS°) were calculated. The thermodynamic parameters of methylene blue/clay system indicated spontaneous and endothermic nature of the adsorption process. The results demonstrate that Yemen natural clay is very effective in the removal of MB from aqueous solution and can be used as alternative of high cost commercial adsorbents. © 2012 Desalination Publications. All rights reserved.
Faisal W.M.,Hadramout University of Science and Technology
Alexandria Engineering Journal | Year: 2012
Using a solid state reaction to prepared many samples of YBa 2Cu 3O 7-δ And (YBa 2Cu 3O 7-δ) 1- x(Ag 2O) x by mixing the appropriate ratios of constituent oxides; BaO, CuO, and Y 2O 3 the mixture were ground to fine power and then calcined at 900 °C without Ag 2O and 930°C for using Ag 2O as impurities. The calcined black power were grounded again and molded into pellets by applying a hydrostatic pressure from (0.3-0.6) Gpa. These pellets were sintered at 950°C. Silver was added as impurities with the calcined powder with ratios of 0.3, 0.35 and 0.45 to increase its ductility. The transition temperature for the superconductor samples were done using non-contact technique. It is an easy and sensitive technique compared with four - point probe method. The maximum T c was 110 K for YBa 2Cu 3O 6.989. Evaporation deposition technique to deposited a thin film, of 2200 A°thickness on the surface of the samples and then annealed to room temperature. This technical reduces the resistance to 0.2 and makes a good ohmic contact at liquid nitrogen boiling point (77 K) metals of various conductivity such as copper, brass aluminum and iron were used to study the effect of eddy-current loss on them and then compared with the superconducting samples, with Ag 2O or without Ag 2O. The maximum power loss were obtained for the superconducting samples when they cooling at liquid nitrogen temperature. The sintered pellets were drilled manually by 6 mm drill and a slot was done along its radius, to fabricate a superconducting loop antenna for receiving magnetic field signal. The best received signal was obtained when the antenna cooled to liquid nitrogen temperature. © 2012 Faculty of Engineering, Alexandria University. Production and hosting by Elsevier B.V. All rights reserved.
Roshan A.-R.A.,Ain Shams University |
Gad H.A.,Ain Shams University |
El-Ahmady S.H.,Ain Shams University |
Khanbash M.S.,Hadramout University of Science and Technology |
And 2 more authors.
Journal of Agricultural and Food Chemistry | Year: 2013
This work describes a simple model developed for the authentication of monofloral Yemeni Sidr honey using UV spectroscopy together with chemometric techniques of hierarchical cluster analysis (HCA), principal component analysis (PCA), and soft independent modeling of class analogy (SIMCA). The model was constructed using 13 genuine Sidr honey samples and challenged with 25 honey samples of different botanical origins. HCA and PCA were successfully able to present a preliminary clustering pattern to segregate the genuine Sidr samples from the lower priced local polyfloral and non-Sidr samples. The SIMCA model presented a clear demarcation of the samples and was used to identify genuine Sidr honey samples as well as detect admixture with lower priced polyfloral honey by detection limits >10%. The constructed model presents a simple and efficient method of analysis and may serve as a basis for the authentication of other honey types worldwide. © 2013 American Chemical Society.
Albiti A.H.,Al Gamhouria Teaching Hospital |
Adam I.,University of Khartoum |
Ghouth A.S.,Hadramout University of Science and Technology
Transactions of the Royal Society of Tropical Medicine and Hygiene | Year: 2010
A cross-sectional study was conducted during the period of August 2007-April 2008 at Al-Wahda Teaching Hospital in Yemen to investigate prevalence and risk factors for placental malaria and anaemia and their effects on birthweight. Sociodemographic characteristics were gathered, maternal haemoglobin was measured and blood films were examined for malaria. Newborn birthweight was recorded. Out of 900 parturient women, malaria blood films were positive in 32 (3.6%) cases: in six sets of peripheral, placental and cord samples; in 15 placental and cord samples; and in 11 placental samples only. Malaria was not associated with age and parity, but it was significantly associated with history of fever [odds ratio (OR) 8.5, 95% CI 3.7-19, P < 0.001], rural residence (OR 2.5, 95% CI 1.1-5.3, P = 0.01) and rainy season (OR 5.1, 95% CI 1.7-15.2, P = 0.003). Overall, 694 (77.1%) out of these 900 women had anaemia (Hb < 11 g/dl) and 16 (1.8%) patients had severe anaemia (Hb < 7 g/dl). Anaemia was not associated with age, parity and malaria. Low birthweight was significantly associated with malaria (OR 5.7, 95% CI 1.7-18.5; P = 0.004). Thus, preventive measures (bednets and intermittent preventive treatment) should be employed for pregnant women regardless of their age or parity. © 2009 Royal Society of Tropical Medicine and Hygiene.
Bashrahil K.A.,Hadramout University of Science and Technology
Eastern Mediterranean Health Journal | Year: 2010
The irrational use of drugs remains a key health problem in many developing countries. Using WHO standard indicators of rational drug use, this study analysed 550 prescriptions from 20 health facilities at different levels throughout Hadramout governorate, Yemen. A mean of 2.8 (SD 0.2) drugs were prescribed per prescription, with a low rate of prescribing drugs by generic name (39.2%). The proportion of prescriptions for antibiotics was 66.2%, for injectable drugs 46.0% and for vitamins/tonics 23.6%. The essential drugs list was available in 78.9% of facilities and a high percentage of drugs were prescribed from the list (81.2%). Other official sources of local drug information were less available.
Ababneh A.,Jordan University of Science and Technology |
Sheban M.,Hadramout University of Science and Technology
Materials and Structures/Materiaux et Constructions | Year: 2011
This paper presents results of an experimental investigation on the effect of mechanical loading on the corrosion of steel reinforcement in concrete. Reinforced concrete beams were cast, subjected to mechanical loadings and then exposed to corrosive environment. Successive drying and wetting cycles using 3% sodium chloride salt solution were used to accelerate the corrosion attack. Electrochemical techniques such as macrocell corrosion current, linear polarization resistance (LPR), corrosion potential (Ecorr) and electrochemical impedance spectroscopic (EIS), were used to evaluate the corrosion behavior of the reinforcement. Also, chloride penetration profile and visual inspection of the beam rebars were obtained. The results shows that the pre-exposure mechanical load has no influence on the corrosion initiation or corrosion rate thereafter, unless it reaches to some limit where it develops connected cracks through which the chloride ions flow and depassivate the rebars. The load of 25% of the ultimate capacity seems to be the critical load limit where some microcracks onset to be connected, facilitate the chloride ions flow, and initiate the rebar corrosion. © RILEM 2010.
Bin Ghouth A.S.,Hadramout University of Science and Technology |
Bin Ghouth A.S.,Office of Ministry of Public Health and Population
Journal of Infection in Developing Countries | Year: 2013
Introduction: Although the government of Yemen changed the national policy for treating malaria in November 2005 from chloroquine to combination drugs in the form of artesunate + sulphadoxine-pyrimethamine (SP) as first line and lumefantrine + artemether as second line treatment for uncomplicated malaria, clinicians in public and private health facilities continued to prescribe chloroquine because their knowledge about the new treatment policy was poor. Methodology: A non-randomized trial of pre- and post-evaluation of the training and reporting interventions about prescription behaviors and availability of anti-malaria drugs among clinicians and pharmacists in the private sector in three governorates in Yemen was conducted. Results: Adherence of clinicians in the private sector to the new national guidelines for anti-malaria drugs improved from 21% in preintervention period to 38% after the intervention for artesunate + SP being prescribed as the first-line treatment. Prescription of lumefantrine + artemether as the second-line anti-malaria treatment was also improved from 18% before the intervention to 22% postintervention. Unfortunately the combination of halofantrine + SP continued to be frequently prescribed by clinicians in Sana'a city (18%). Artesunate + SP and quinine are increasing their marketing significantly from 8% in the pre-intervention period to 22% post-intervention (Pvalue 0.001). Conclusions: The study provides evidence of usefulness of the training intervention on the national guidelines for malaria treatment. Additionally, the involvement of private health-care providers in reporting procedures will promote the rational prescription and availability of anti-malaria drugs. © 2013 Bin Ghouth.
Faisal W.M.,Hadramout University of Science and Technology |
Al-Ani S.K.J.,University of Baghdad
International Journal of Physical Sciences | Year: 2012
A ceramic superconductor compounds with the composition Bi 2Sr 2Ca n-1Cu nO 2n+4δ were prepared by solid state reaction from the principle routs like Bi-2212,Ca 2CO 3 and CuO with high purity of 99.99%. Different measurement such as resistivity measurement, X-ray diffraction (XRD) and scanning electron microscope (SEM) were made to show the improvement in the superconductivity of the high phase. The lattice constants are obtained for undoped and Pb doped samples with different values of n. The critical temperatures (Tc) of the high temperature superconducting cuprate (HTSC) Bi 2Sr 2Ca n-1Cu nO 2n+4δ were obtained to be Tc =108K for the undoped sample and equal to 133, 115, 147 and 127K for n=3, n=3.5, n=4 and n=4.5 Pb doped systems, respectively.