Asian Journal of Physical and Chemical Sciences

Determination of the Sulfur Content of Gasoline from Four Major Fuel Distributors in Dakar

Sat, 15 Jun 2024 00:00:00 +0000

Sulfur dioxide is an acidifying gaseous pollutant. It contributes to the acidification of the environment. When emitted into the air and in the presence of water, sulfur dioxide forms sulfuric acid, which contributes to the phenomenon of acid rain. Acidifying substances disrupt the composition of air, surface water and soil.

Sulphur dioxide (SOx) emissions are closely linked to the use of fuels containing sulphur, and the maximum permitted sulphur content is one of the most closely monitored fuel parameters. In this article, we determined the sulfur content of gasoline samples taken from four service stations belonging to the most representative groups in terms of light petroleum product distribution in Senegal. The aim is to assess the environmental impact of sulfur dioxide emissions resulting from the use of gasoline by vehicles, and to reduce upstream sulfur content.

Extraction, Evaluation, and Formulation of Hyptis capitata Jacq. (Burunganon) Flower Crude Extract as Bactericidal Ointment

Fri, 12 Jul 2024 00:00:00 +0000

Bacterial infection is not only a nationwide problem but a global health concern facing communities and populations across the world. The impact of bacterial infections extends beyond just the health sectors, affecting economies, healthcare systems, and overall societal well-being. This study developed and evaluate ointment from Hyptis capitata Jacq. (Burunganon) flower crude extract and its antibacterial potential. The phytochemical screening was to determine the presence of Alkaloids, phenolic, and cardiac glycosides. The physicochemical properties were analyzed to determine their appearance, homogeneity, odor, pH, spreadability, and water number, and the antibacterial properties were determined. Results showed that the Burunganon flower crude extract revealed the presence of alkaloids, flavonoids, phenolic and cardiac glycoside. Result in physicochemical screening of the formulated ointment showed that it had a yellowish color, good homogeneity, menthol like fragrance, slightly acidic, had a good spreadability, and the base had a good absorption of water. Meanwhile, the formulated ointment from burunganon flower crude extract showed inhibitory effect against E. coli and P. aeruginosa. Therefore, the Burunganon flower crude extract showed a presence of secondary metabolites that can be used in a wide range of pharmaceutical application, a promising candidate for development of bacterial agents, providing a natural and potentially effective alternative for combatting infections. Additionally, it shows that it has an good physicochemical properties that can be used in development of bactericidal ointment. More physicochemical test, different base used in formulation, further characterization, and incorporation of antibacterial were recommended.

Radon Risk Awareness among Undergraduate Students of Adekunle Ajasin University, Akungba Akoko, Nigeria

Asere Adeola Margaret — Thu, 22 Aug 2024 00:00:00 +0000

The study was conducted to assess the knowledge of undergraduate students of Adekunle Ajasin University, Akungba Akoko (AAUA), Ondo State, Nigeria, about radon risk and possible impediment they might face for radon testing. One hundred students were randomly sampled from six Faculties in the University. A descriptive research design of survey type was used and a semi-structured questionnaire was administered to the students. Three research questions raised were solved using descriptive statistics. The survey found that 88% of the responders were not aware that high radon exposure could cause lung cancer and 94% does not believe in the health effect of radon. Concerning radon testing, 8% knew that radon could be detected, 12% had knowledgeable awareness of how to test for radon, and 8% possesses information about where to procure radon test kits. Insufficient knowledge of radon risk exist among the undergraduate students of AAUA. More awareness through media and lectures is therefore recommended for members of the University community.

Study and Sizing of Centrifugal Pumps: The Case of SOMAÏR's 2013 Pumps, North Niger

Thu, 22 Aug 2024 00:00:00 +0000

The present study concerns the design and sizing of centrifugal pumps, the case of the 2013 pumps used at the Société des Mines de l'AÏR. The Société des Mines de l'Aïr (Somaïr), characterized by extensive modernization and industrialization, has increasingly new needs. The study began by analyzing the existing situation for each circuit. We then proceeded to size the pumps, choosing the type of pump and the material best suited to each type of circuit, taking into account the characteristics of the fluid being pumped. The suction and discharge head losses are 0.02434 m and 0.038 m respectively. The pump's hydraulic power is 10.806 kW. In view of the 18.5 kW mechanical power required for the drive motor, we have chosen 13.51 kW in order to keep within a reasonable margin. Thus, the pump has an absorbed power of 13.51 kW with an efficiency of 80%. For the P3 2225 pump, the mechanical power is 2.4 kW, the HMT is 50 m, and the flow rate, speed and efficiency are 10 m³ /h, 2900 rpm and 60% respectively. For the P4 5154 pumps in the discharge circuit, the mechanical power of the pump is 6.42 KW, the HMT is 30 m and the flow, speed and efficiency are 50 m³ /h, 2900 rpm and 68% respectively.