Jazan University is a public research university based in the city of Jazan . Founded in 2006, It is the province's only university and one of the largest public, nonprofit institutions of higher education in the Kingdom of Saudi Arabia. JazanU has a main central campus that rests by the Red Sea on the southwest coast of Saudi Arabia and also has satellite campuses in Sabya, Abu Arish, Farasan, Ad-darb, Samtah, Al-Daer and Al-Ardah.JazanU offers a broad range of academic departments, an extensive research enterprise and a number of community outreach and public service programs. It is particularly well known for its medical school, dental school, school of business, its social science and humanities programs, as well as its biomedical teaching and research capabilities. Wikipedia.
Khamaj J.A.,Jazan University
Applied Materials Today | Year: 2017
The derivatives of graphene are new class of materials with promising applications in modern electronics. In this paper, we reported the effect of heat treatment in electrical transport characteristics of graphene-oxide (GO) transistors. The GO nanoparticles were prepared using modified Hummers method and were characterized with UV–vis spectroscopy, X-ray diffraction, and scanning electron microscopy. Transistor characteristics of GO were studied and the transfer characteristics confirm the p-type semiconducting nature of GO. The mobility was extracted as 0.29 cm2 V−1 s−1. The reason for the obtaining lower mobility is due to the existence of oxygenated functional groups in GO basal plane. However, after heat treatment, we obtained an improved conduction which is due to removal of functional groups from GO. This has been evidently proved through our FT-IR results. GO becomes “less hydrophilic” nature and turns into reduced-graphene oxide (rGO) after the heat treatment. Our results show the potential future in the development of futuristic rGO based transistors. © 2016 Elsevier Ltd
Ansari S.A.,Aligarh Muslim University |
Husain Q.,Jazan University
Biotechnology Advances | Year: 2012
Several new types of carriers and technologies have been implemented in the recent past to improve traditional enzyme immobilization which aimed to enhance enzyme loading, activity and stability to decrease the enzyme biocatalyst cost in industrial biotechnology. These include cross-linked enzyme aggregates, microwave-assisted immobilization, click chemistry technology, mesoporous supports and most recently nanoparticle-based immobilization of enzymes. The union of the specific physical, chemical, optical and electrical properties of nanoparticles with the specific recognition or catalytic properties of biomolecules has led to their appearance in myriad novel biotechnological applications. They have been applied time and again for immobilization of industrially important enzymes with improved characteristics. The high surface-to-volume ratio offered by nanoparticles resulted in the concentration of the immobilized entity being considerably higher than that afforded by experimental protocols based on immobilization on planar 2-D surfaces. Enzymes immobilized on nanoparticles showed a broader working pH and temperature range and higher thermal stability than the native enzymes. Compared with the conventional immobilization methods, nanoparticle based immobilization served three important features; (i) nano-enzyme particles are easy to synthesize in high solid content without using surfactants and toxic reagents, (ii) homogeneous and well defined core-shell nanoparticles with a thick enzyme shell can be obtained, and (iii) particle size can be conveniently tailored within utility limits. In addition, with the growing attention paid to cascade enzymatic reaction and in vitro synthetic biology, it is possible that co-immobilization of multi-enzymes could be achieved on these nanoparticles. © 2011 Elsevier Inc.
Nasreen A.,Jazan University
Tetrahedron Letters | Year: 2013
l-Proline (20 mol %) was found to be an efficient organocatalyst for one pot synthesis of a variety of α-aminonitriles from aldehydes, amines, and trimethylsilyl cyanide (TMSCN) in acetonitrile at ambient temperature giving good to excellent yields (72-95%). © 2013 Elsevier Ltd. All rights reserved.
Kamel R.M.,Jazan University
International Journal of Women's Health | Year: 2013
Background: Chlamydia trachomatis infection is a worldwide-distributed sexually transmitted infection that may lead to infertility. Objectives: This study aims to report the prevalence of Chlamydia trachomatis infection among infertile women in Saudi Arabia. Patients and methods: A community-based study carried out at the obstetrics and gynecology clinic at Jazan General Hospital, Saudi Arabia. The study group included 640 Saudi infertile women who were aged between 18 and 40 years and who attended the gynecology clinic for infertility examination throughout 1 year of study (from July 1, 2011 to June 30, 2012). The randomized control group included 100 Saudi fertile women who attended the obstetrics clinic for routine antenatal care. All recruited women were screened for chlamydia infection by enzyme-linked immunosorbent assay (ELISA) for detection of serum-specific antibodies and then retested by the McCoy cell culture technique. Results: The prevalence of Chlamydia trachomatis infection among infertile women was high, at 15.0%. The rate of chlamydia infection detected by ELISA was 9.84%, and it was 12.03% by the culture method (P = 0.2443). Conclusion: The high prevalence of Chlamydia trachomatis infection among Saudi infertile women demands a national screening program for early detection among infertile couples. ELISA is available as a simple screening test alternative to the culture method. © 2013 Kamel, publisher and licensee Dove Medical Press Ltd.
Abdelwahab S.I.,Jazan University
International Immunopharmacology | Year: 2013
Some phytochemicals demonstrate gastroprotective effects by inhibiting gastric acid secretion or through antioxidant action. One of these antioxidant phytochemicals which have been studied is gallic acid. However, its mechanism in the treatment and prevention of gastric ulcer remains unclear. This study evaluated the anti-ulcerogenic mechanism(s) of gallic acid (GA) and its novel synthetic derivative (GD). Adult male Sprague Dawley rats were orally pretreated with GA and GD and 30 min later exposed to acute gastric ulcerogenesis induced by 95% ethanol (5 ml/kg). Potential gastric chemoprevention of GA and GD were assessed using qualitative and quantitative evaluation of gastric lesions, gastric juice acidity, mucus production, histolopathology, PAS histochemistry, immunostaining of Hsp70 and Bax, nitric oxide, prostaglandin E2, TNF-α and thiobarbituric acid reactive substances (TBARS) assay. Oral administration of GA and GD (25 and 50 mg/kg) inhibited significantly (P < 0.05) ethanol-induced gastric lesions. Treatment with the compounds protected rat's stomach and modulated remarkably the levels of PAS-reactive substances, gastric pH, TBARS, immunological and apoptosis marker. The in vivo antioxidant properties, immunomodulator proteins and inhibition of mitochondrial apoptosis may contribute to the gastroprotective activity of gallic acid (GA) and its novel derivative (GD). © 2013 Elsevier B.V.
Kamel R.M.,Jazan University
Reproductive Biology and Endocrinology | Year: 2010
Background: Infertility is defined as inability of a couple to conceive naturally after one year of regular unprotected sexual intercourse. It remains a major clinical and social problem, affecting perhaps one couple in six. Evaluation usually starts after 12 months; however it may be indicated earlier. The most common causes of infertility are: male factor such as sperm abnormalities, female factor such as ovulation dysfunction and tubal pathology, combined male and female factors and unexplained infertility.Objectives: The aim of this study is to provide the healthcare professionals an evidence-based management protocol for infertile couples away from medical information overload.Methods: A comprehensive review where the literature was searched for "Management of infertility and/or infertile couples" at library website of University of Bristol (MetaLib) by using a cross-search of different medical databases besides the relevant printed medical journals and periodicals. Guidelines and recommendations were retrieved from the best evidence reviews such as that from the American College of Obstetricians and Gynaecologists (ACOG), American Society for Reproductive Medicine (ASRM), Canadian Fertility and Andrology Society (CFAS), and Royal College of Obstetricians and Gynaecologists (RCOG).Results: A simple guide for the clinicians to manage the infertile couples.Conclusions: The study deploys a new strategy to translate the research findings and evidence-base recommendations into a simplified focused guide to be applied on routine daily practice. It is an approach to disseminate the recommended medical care for infertile couple to the practicing clinicians. © 2010 Kamel; licensee BioMed Central Ltd.
Safhi M.M.,Jazan University
Oriental Journal of Chemistry | Year: 2013
A new, simple and sensitive Spectrophotometric Method in ultraviolet region has been developed for the determination of cilnidipine in bulk and in pharmaceutical formulations. Cilnidipine exhibits absorption maxima at 240 nm. The method obeys the Beer's law in the concentration range of 2 - 30 μg/ml. The method is accurate, precise and economical. The % recovery is greater than 99.86 - 100.67%. This shows that the method was free from the interference of excepients. The results of the tablet analysis were validated with respect to accuracy (recovery), linearity, limit of detection and limit of quantization were found to be satisfactory. The proposed method has been applied successfully for the analysis of the drug in pure and in its tablet dosage forms.
Almalki M.J.,Jazan University
BMC health services research | Year: 2012
Quality of work life (QWL) has been found to influence the commitment of health professionals, including nurses. However, reliable information on QWL and turnover intention of primary health care (PHC) nurses is limited. The aim of this study was to examine the relationship between QWL and turnover intention of PHC nurses in Saudi Arabia. A cross-sectional survey was used in this study. Data were collected using Brooks' survey of Quality of Nursing Work Life, the Anticipated Turnover Scale and demographic data questions. A total of 508 PHC nurses in the Jazan Region, Saudi Arabia, completed the questionnaire (RR = 87%). Descriptive statistics, t-test, ANOVA, General Linear Model (GLM) univariate analysis, standard multiple regression, and hierarchical multiple regression were applied for analysis using SPSS v17 for Windows. Findings suggested that the respondents were dissatisfied with their work life, with almost 40% indicating a turnover intention from their current PHC centres. Turnover intention was significantly related to QWL. Using standard multiple regression, 26% of the variance in turnover intention was explained by QWL, p < 0.001, with R2 = .263. Further analysis using hierarchical multiple regression found that the total variance explained by the model as a whole (demographics and QWL) was 32.1%, p < 0.001. QWL explained an additional 19% of the variance in turnover intention, after controlling for demographic variables. Creating and maintaining a healthy work life for PHC nurses is very important to improve their work satisfaction, reduce turnover, enhance productivity and improve nursing care outcomes.
Kamel R.M.,Jazan University
Archives of Gynecology and Obstetrics | Year: 2010
Background: Despite impressive progress in the science and technology of reproduction, the mechanism by which labour is initiated in humans remains obscure. Objectives: As the labour in humans is a distinct event differs from what happens in animals, this study aims to gather the current theories that could explain when and why the onset of human parturition occurs. Methods: In a comprehensive review study done at the School of Medicine and Dentistry, University of Bristol, United Kingdom, MetaLib, the university web-based electronic library, was cross-searched for the factors behind the onset of labour in humans through different medical databases such as; Allied and Complementary Medicine Database (AMED), BIOSIS Previews on Web of Knowledge, PubMed, Cochrane Library, Medline and Web of Science, in-addition to the relevant printed medical journals and periodicals. Results: The study revealed that among the potential factors involved in the process of human parturition are the changes in hormonal levels of estrogen and progesterone, increased production of prostaglandins and oxytocin, and the high levels of corticotrophin releasing hormone and cortisol are some among the potential factors involved in the process of human parturition. Inflammatory reactions with the release of cytokines are among the most accepted theories for term and preterm labours. It is most likely that the interaction between all these factors and others, yet to be discovered, play in harmony to initiate the process of labour in women. Conclusion: The result show that birth is a result of complex, partially defined, events that are tightly regulated by a variety of mechanisms and mediators of endocrine, nervous and immune systems. Unfortunately, none of them is completely elucidated. © 2010 Springer-Verlag.
El-Bialy E.,Jazan University
Energy | Year: 2014
The availability of potable water per capita is contracting because of the growth of population. Solar distillation method is a promising method for supplying potable water to rural regions. Passive solar distiller is a simple device for the partial solution of the problem of shrinking potable water, because its simplicity in construction, operation and low cost. In this work, a detailed comparison between the thermal performance of single slope single basin solar distiller (SBD) and single slope single basin solar distiller with a floating absorber (SBDFA) has been investigated. The two units are designed, fabricated and tested under the same weather conditions of Tanta, Egypt (Lat 30° 47'N) during typical summer days. Effects of basin water mass and the type of the floating absorber plate on the daily productivity and efficiency of the proposed systems are investigated. For all investigated values of the mass of water above the floating absorber (mwu); the productivity of the SBDFA is found to be higher than that of the SBD. The improvement ratio of daily productivity is found to increase with the decrease of the value of mwu. The improvement ratio of daily productivity was found to be 42.2%, 15.2%, 20.1% and 17.2% when mica, stainless steal, aluminum and cooper are used as floating absorbers (mwu=10kg, mwL=70kg). The obtained experimental results indicated that the SBDFA can be used for supplying potable water with reasonable amounts. © 2014 Elsevier Ltd.