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ผลงานตีพิมพ์ในวารสารวิชาการRadicals in the reaction between peroxynitrite and uric acid identified by electron spin resonance spectroscopy and liquid chromatography mass spectrometryผู้แต่ง: Dr.Witcha Imaram, Assistant Professor ,  Gersch,C., Kim,K.M., Johnson,R.J., Henderson,G.N., Angerhofer,A., วารสาร:   
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ผลงานตีพิมพ์ในวารสารวิชาการElectron Spin Resonance Analysis of ฮณ-induced Free Radicals in Riceberry Rice Grainผู้แต่ง:Rintarak, P., Dr.Busara Pattanasiri, Assistant Professor , Anupong, S., Ninlaphruk, S., Dangtip, S., วารสาร: |
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การประชุมวิชาการThermoluminescence study of quartz from the Sambagawa metamorphic belt, Central Shikoku, Japanผู้แต่ง:Dr.Theeraporn Chuenpee, Lecturer, O. Nishikawa, Y. Kon, K. Ninagawa, S. Toyoda, T. Ogata, T. Uchida, I. Takashima, การประชุมวิชาการ: |
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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Electron Spin Resonance (ESR) and Optical Absorption Spectra of a Manganese Doped Soda-Lime-Silicate Glass System) ผู้เขียน:Nattapon Srisittipokakun, Chittra KedKaew, Jakrapong Kaewkhao, Treedej Kittiauchawal, เขมฤทัย ถามะพัฒน์, พิเชษฐ ลิ้มสุวรรณ สื่อสิ่งพิมพ์:pdf AbstractA (65-x)SiO2:10CaO:25Na2O:xMnO2 glass system with 0 ? x ? 0.5 mol% was prepared and investigated by X-ray diffraction, optical absorption and ESR spectroscopies. The XRD pattern of undoped glass confirmed the formation of an amorphous vitreous structure. The optical absorption spectra exhibited a predominant broad band around 500 nm and its increase was clearly observed from 0.1 mol% of MnO2. This band corresponded to an allowed transition from 5Eg5T2g, of Mn3+ ions. When the MnO2 concentration was increased, the absorption band due to Mn3+ ions dominated. The ESR spectra results exhibited resonance signals at g ? 2.0 with a sextet of hyperfine lines and less intensity at g ? 4.3. The group of hyperfine lines at g ? 2.0 represented Mn2+ ions in octahedral symmetry. However, these lines were broader and disappeared for higher MnO2 concentrations. This behavior indicated the reduction of Mn2+ ions in the glass system as the concentration of MnO2 was increased by increasing the Mn3+ ions. |
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ที่มา:การประชุมทางวิชาการของมหาวิทยาลัยเกษตรศาสตร์ ครั้งที่ 47หัวเรื่อง:การศึกษาตัวติดตามคุณภาพน้ำบริเวณพื้นที่ชายฝั่งจังหวัดชลบุรีด้วยเปลือกหอยเชลล์ |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : A Biomonitoring Study: Trace Metals in Amusium pleuronectes Shell from the Coastal Area of Chon Buri Province) ผู้เขียน:วิเชียร ศิริพรม, พิเชษฐ ลิ้มสุวรรณ สื่อสิ่งพิมพ์:pdf AbstractThe objective of the present study was to conduct a preliminary investigation of pollution in the coastal area of Chon Buri province environment with a focus on heavy metals in Amusium pleuronectes shell. An energy Dispersive X-ray Fluorescence (EDXRF) spectrometer was used to determine the composition of mineral and levels of the heavy metals, gold (Au), zinc (Zn), lead (Pb), chromium (Cr), iron (Fe) and manganese (Mn) in the Amusium pleuronectes shell. The results showed that the highest to lowest accumulated metals are Fe, Mn, Cr, Zn, Pb and Au, respectively. The crystal structure and microstructure of the shells were studied by x-ray diffraction (XRD) technique and IR spectroscopy, respectively. The XRD patterns and IR spectrum revealed that the samples is made of a mixture phase of aragonite and calcite. In addition, the Electron Spin Resonance Spectroscopy (ESR) was used to study the ions in the samples. It was found that the samples consists of Mn2+ ions in the calcite lattice of the Amusium pleuronectes shell. |