Articles

Isolation and Identification of Indigenous Bacteria for the Degradation of Polycyclic Aromatic Hydrocarbons Found in Refinery Wastewater

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Polycyclic aromatic hydrocarbon (PAH) degrading bacteria were screened and isolated from contaminated soil taken from Tema Oil Refinery wastewater effluent channels. Refinery wastewater was found to contain a low amount of inhibitory heavy metals but the presence PAHs were detected and identified. The PAH-degrading bacteria isolated and identified were Pseudomonas stutzeri. Acinetobacter junii, Pseudomonas putida and Stetonotrophomonas nititireducens. All four bacteria showed high tolerance to a PAH combination of Naphthalene and Anthracene (1:1) of concentration as high as 5mg/ml. The identification of S. nititreducens as an indigenous bacterium is very significant since it is one of the very few bacteria known to be able to degrade high molecular weight PAHs.

The Influence of Quarantine on Thai Highschool Students’ Productivity

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Due to the current pandemic of COVID-19 which rendered many public and crowded places closed for safety measures and preventing further spreading of the mentioned disease. One of the places closed as a safety precaution is schools. And because of this, many high school students’ education is put on pause as they are encouraged to stay at home. Moreover, citizens other than students are obliged to stay at home and engage in minimal contact with the outside world. From this, we are introduced to the word quarantine which is an official term describing the act of imposing isolation on individuals or a group of individuals; consequently, most adults and parents fear that this will affect their children’s productivity especially that they are in high school and very close to transitioning to universities and adulthood. As thai highschoolers, we wanted to put this belief to the test by conducting this research which focuses mainly on assessing the effects of quarantine on thai high school students’ productivity in terms of self care, education,and contribution to others. Our goal is to disprove the assumption held by many that quarantine would lead to decrement of high school students’ productivity. Interestingly, our thesis was proven true and our thought processes and procedures will be further elaborated in this research paper.