https://dspace.rmutk.ac.th/jspui/handle/123456789/235 Tue, 14 Apr 2026 18:48:16 GMT 2026-04-14T18:48:16Z http://localhost:80/jspui/retrieve/4fa46314-3510-47ed-b8a3-6f7087896416/ https://dspace.rmutk.ac.th/jspui/handle/123456789/235 https://dspace.rmutk.ac.th/jspui/handle/123456789/325 Title: Synthesis of Fe-SWCNHs via Arc-discharge in Water Method and Its Application on Antibiotics Adsorption Authors: Jirapat Pakchamsai; Cheewapon Chookiat; Tawatchai Charinpanitkul; Chantamanee Poonjarernsilp Abstract: The unique structures of SWCNHs motivate scientists and researchers to conduct various investigations on them. SWCNHs outstanding properties, i.e. high surface area and good chemical stability lead to several useful applications. Among various methods for synthesizing SWCNHs, Gas-Injected Arc-In-Water method (GI-AIW) is recognized as a good candidate because it is a simple, compact, and cost-effective method. Meanwhile, SWCNHs produced by the proposed method can be used to adsorb antibiotics because of their high specific surface area. In this study, GI-AIW method with unique configuration of graphite anode inserted with iron (Fe) wires was employed for synthesizing Fe-SWCNHs. The nitrogen gas flow rate of 8 L/min would lead to highest production yield (%) of SWCNH (varying from 4, 6, 8, and 10 L/min) about 7.7%. Tetracycline was employed as a target antibiotic due to its wide usage in Thai agricultural industry. Both of Fe-SWCNH and SWCNH have the antibiotic adsorption capability. However, the addition of Fe is found to worsen antibiotics adsorption capacity of SWCNHs from 25% to 21% approximately. Fri, 01 Jan 2016 00:00:00 GMT https://dspace.rmutk.ac.th/jspui/handle/123456789/325 2016-01-01T00:00:00Z https://dspace.rmutk.ac.th/jspui/handle/123456789/236 Title: E-Practice for Statistical Analysis in Business Course Authors: Nikorn Kannikaklang Abstract: The purposes of this study were to develop an E-Practice for statistical analysis in business course which was developed for undergraduate students in Business Administration Faculty at Rajamangala University of Technology Krungthep (RMUTK), to test hypothesis of learning achievement in two groups; experimental group and control group, and to evaluate satisfaction of this E-Practice. After the production of the E-Practice, three experts tested and evaluated the E-Practice, which overall parts of satisfaction were evaluated at high level. The hypothesis of learning achievement tested between experimental group 20 students and control group 20 students. It was found that the learning achievement of the experimental group outperformed the control group with the statistical significance at .01 (p-value < .01). After that, all groups of students studied the E-Practice and evaluated satisfaction. It was found that overall parts were evaluated at high level. Fri, 01 Jan 2016 00:00:00 GMT https://dspace.rmutk.ac.th/jspui/handle/123456789/236 2016-01-01T00:00:00Z