3-Benzyl-8-meth­oxy-2-sulfanyl­idene-1,2,3,4-tetra­hydro­quinazolin-4-one

The tetra­hydro­quinazole fused-ring system of the title compound, C16H14N2O2S, is roughly planar (r.m.s. deviation = 0.039 Å); the phenyl ring of the benzyl substituent is aligned at 78.1 (1)° with respect to the mean plane of the fused-ring system. In the crystal, two mol­ecules are linked by a pair of N—H⋯S hydrogen bonds about a center of inversion, generating a dimer

3-(Prop-2-en-1-yl)-2-sulfanyl­idene-1,2,3,4-tetra­hydro­quinazolin-4-one

The tetra­hydro­quinazoline fused-ring system of the title compound, C11H10N2OS, is approximately planar (r.m.s. deviation = 0.019 Å). In the crystal, adjacent mol­ecules are linked by N—H⋯O hydrogen bonds, forming a chain running along the b axis

N-[2,4-Dioxo-3-aza­tricyclo­[7.3.1.05,13]trideca-1(13),5,7,9,11-pentaen-3-yl]thio­urea

In the two independent mol­ecules in the asymmetric unit of the title compound, C13H9N3O2S, the aza­tricyclo­trideca­penta­ene ring system is approximately planar with r.m.s. deviations of 0.022 and 0.033 Å. The urea unit connected to the fused rings is approximately perpendicular [dihedral angles = 82.4 (1) and 82.7 (1)°]. In the crystal, the mol­ecules associate by N—H⋯O hydrogen bonds, forming a chain running along the a axis. The crystal studied was a non-merohedral twin with a fractional contribution of 49.6 (1)% for the minor domain

5-Chloro-2-methyl­sulfonyl-1,2,4-triazolo[1,5-a]quinazoline

The triazoloquinazole fused-ring system of the title compound, C10H7ClN4O2S, is essentially planar (r.m.s. deviation = 0.009 Å). In the methyl­sulfonyl substituent, the two S—O bonds are of equal length [1.402 (2) Å]. In the crystal, adjacent mol­ecules inter­act weakly through Cl⋯N contacts [ca 3.197 (2) Å]

Students’ Perceived Benefits of Integrating a BSc in Health Sciences within a Medical Degree at Sultan Qaboos University

Objectives: After completing the pre-clinical phase of a Doctor of Medicine (MD) curriculum, undergraduate medical students may choose to add a Bachelor of Science (BSc) degree in health sciences to their MD degree. Limited data exists on the motives behind students’ decisions to undertake such intercalated degrees. Hence, this study aimed to identify the factors that influence students in making this choice. Methods: Undergraduate students who chose the research-based academic track of the intercalated phase of the BSc programme at the College of Medicine and Health Sciences, Sultan Qaboos University, Muscat, Oman, between 2014–2018 were enrolled. A standardised and validated self-explanatory questionnaire examining motivations to join the intercalated phase was administered to all students in the first week of enrolment. Results: Over a five-year period, out of 557 eligible students, 18 (3%) were enrolled in the intercalated phase and all completed the questionnaire. The mean age was 22 ± 1.5 years and the majority (83%) were female. Out of the 18 students, 10 (55%) had taken the university’s foundation programme. A total of 45% of students chose to intercalate out of their own interest, regardless of career ambitions. The main reasons to intercalate were an opportunity to enhance research experience, alignment with long-term career goals and a chance to publish in indexed journals. Conclusion: Despite the benefits of obtaining an additional degree, a relatively small proportion of MD students were attracted to the intercalated phase. A better presentation of the BSc degree is needed to help students make a more informed decision.Keywords: Medical Education; Undergraduate Medical Education; Career Choice; Curriculum; Oman

The environmental impacts of calcium chloride addition to cement on reinforcing steel corrosion

An alternative use of a specific type of cement for a particular purpose, usually we can change some properties of available cement by using the appropriate additions, with some negative side effects in some cases. In this research have been suggested values ??of calcium chloride(CaCl2) additions for use in concrete admixtures as an agent factor in accelerating the process of cement setting, to clarify the extent of the negative impacts that could be induced, such as alkalinity decline of solution and the impact of the chemical composition of used cement on reinforcing steel. Chloride ion present in low alumina cement mortar was detected quickly, while it needed to increase calcium chloride content to double in moderate alumina cement mortar. The results showed that the depth of carbonation when samples of different composition and with various w/c ratio treated by stream was faster in low ammonia cement mortar from moderate ammonia and faster in mortar poor than in mortar rich, In addition, depth of carbonation increased when the calcium chloride content in cement was very small. Electrical potential of steel in cement mortar inversely proportional with increasing calcium chloride content and with increasing in water/cement ratio and increasing sand content in cement mortar medium ammonia. The lowest level of steel oxidation observed in mortar consisting of cement medium ammonia and the rate of corrosion increases when samples treated by stream in all cases. Keywords: Calcium Chloride, Oxidation, Reinforcement, Stream Treatment, Carbonation, Concrete admixtures, Electric potentia

Assessment of coronary heart diseases in diabetics in al-Madinah al-Munawarah

Omar al-Nozha1, Moaz Mojadadi2, Mohamed Mosaad1,3, Mohamed F El-Bab2,41Department of Medicine, 2Department of Physiology, College of Medicine, Taibah University, al-Madinah al-Munawarah, Kingdom of Saudi Arabia; 3Department of Medicine, 4Department of Physiology, Faculty of Medicine, Suez Canal University, Ismailia, EgyptBackground: Coronary heart disease is highly prevalent and a major cause of morbidity and mortality in diabetic patients. The aim of this study was to assess the major risk factors and their predictor score for coronary heart diseases in diabetic patients.Methods: The present study was conducted in al-Madinah, Kingdom of Saudi Arabia. Using a cross-sectional case control study, 262 outpatient diabetics and 264 matched control subjects were examined for the risk factors and risk predictor scores for ischemic heart disease. The mean age of the patient and control groups was 49.61 ± 12.93 years and 48.39 ± 11.60 years, respectively.Results: Diabetic patients had significantly higher positive family history of diabetes, but no significant difference regarding their family history of hypertension. There was a significantly higher body mass index (33.67 kg/m2), glycosylated hemoglobin (7.26%), significantly higher cholesterol, low-density lipoprotein, and triglyceride in diabetics compared to control. Diabetic patients had higher risk for developing coronary heart disease with a mean risk score of 6.07 while the control subject risk score was -6.81. However, females showed significantly higher risk for coronary heart diseases than did males.Conclusion: Our study replicates the known fact of higher risk in diabetes, but higher risk of coronary heart disease in female diabetics compared with male diabetics.Keywords: coronary heart disease, risk factors, diabetes mellitu

2-Phen­oxy-1,2,4-triazolo[1,5-a]quinazol­in-5(4H)-one

The triazoloquinazole ring system in the title compound, C15H10N4O2 is approximately planar (r.m.s. deviation = 0.035 Å). The phenyl ring of the phen­oxy substitutent is aligned at 59.3 (1)° with respect to this ring system. In the crystal, two mol­ecules are linked about a center of inversion by a pair of N—H⋯O hydrogen bonds, generating a dimer

2-Methyl­sulfanyl-1,2,4-triazolo[1,5-a]quinazolin-5(4H)-one

The non-H atoms of the title compound, C10H8N4OS, lie approximately in a common plane (r.m.s. deviation = 0.058 Å). In the crystal, two mol­ecules are linked across a center of inversion by a pair of N—H⋯N hydrogen bonds, forming a a dimer

Intelligent control of miniature holonomic vertical take-off and landing robot

This paper discusses the development of a fuzzy based controller for miniaturized unmanned aerial vehicle (UAV).This controller is designed to control the center-of-gravity (CoG) in a new configuration of coaxial miniaturized flying robot (MFR). The idea is to shift the CoG by controlling two pendulums located in perpendicular directions; each pendulum ends with a small mass. A key feature of this work is that the control algorithm represents the original nonlinear function that describes the dynamics of the proposed system. The controller model incorporates two cascaded subsystems: PD and PI fuzzy logic controllers. These two controllers regulate the attitude and the position of the flying robot, respectively. A model of the proposed controllers has been developed and evaluated in terms of stability and maneuverability. The results show that the presented control system can be used efficiently for the MFR applications