https://li02.tci-thaijo.org/index.php/ssstj <p>The Suan Sunandha Science and Technology Journal (SSSTJ) is a double-blind peer-reviewed scientific journal published twice a year (January and July) by the Faculty of Science and Technology, Suan Sunandha Rajabhat University. Submissions of manuscripts should be sent to the Editor of the SSSTJ by online system.The manuscript will be taken that all contributing authors attest that manuscripts and material submitted to the SSSTJ are original and have not been published or submitted elsewhere and the authors concede to the open-access distribution of the manuscript, including all content contained therein.</p> <div> <h3><strong>Open Access Journal – SSSTJ (An International Journal)</strong></h3> </div> <div> <p><strong>Editor-in-Chief:</strong> Assoc. Prof. Dr. Narong Sangwaranatee, Suan Sunandha Rajabhat University (Thailand).</p> <p><strong>Open Access:</strong> meaning all content is freely accessible (without fees) online to everyone, everywhere. Journal publishes under the Creative Commons Attribution License (CC BY).</p> <p>SSSTJ has both online and printing versions.<br />ISSN 2351-0889 (Print)<br />e-ISSN 2539-5742 (Online)<br /><br />SSSTJ is an international, cross-disciplinary, scholarly and open access journal of science and technology. The focus is to publish papers on state-of–the-art science and technology.</p> <p><strong>Fast Publications:</strong> The published research manuscripts are peer-reviewed and a first decision provided to authors within 30-60 days after submission.</p> </div> <div> <h3>General Information</h3> <p>The Suan Sunandha Science and Technology Journal (SSSTJ) is a double-blind peer-reviewed (at least two reviewers) scientific journal published twice a year (January and July) by the Faculty of Science and Technology, Suan Sunandha Rajabhat University. Submissions of manuscripts should be sent to the Editor of the SSSTJ by online system: http://www.ssstj.sci.ssru.ac.th. The manuscript will be taken that all contributing authors attest that manuscripts and material submitted to the SSSTJ are original and have not been published or submitted elsewhere and the authors concede to the open-access distribution of the manuscript, including all content contained therein.</p> </div> <div> <h3>Aim and Scope</h3> <p>Suan Sunandha Science and Technology Journal (SSSTJ) is an international academic journal that gains foothold at Suan Sunandha Rajabhat University, Thailand and opens to scientific communications in Southeast Asia, Asia and worldwide. It aims to contribute significant articles in science and technology researches. Published papers are focus on state of the art science and technology. Committee of the journal and association will review submitted papers. The authors may include researchers, managers, operators, students, teachers and developers.<br /><br />Following areas are considered for publication:</p> <div class="panel-heading"> <strong>Areas of Publications</strong></div> <div class="list-group"><a class="list-group-item"> Biology (BI)</a><a class="list-group-item"> Biotechnology (BT)</a><a class="list-group-item"> Environmental Science and Technology (EN)</a><a class="list-group-item"> Food Science and Technology (FT)</a><a class="list-group-item"> Microbiology (MI)</a><a class="list-group-item"> Applied Science (AS)</a><a class="list-group-item"> Computer Science and Information Technology (CS)</a><a class="list-group-item"> Other related fields (OF)</a></div> <h3>Publication Frequency</h3> </div> <div> <p>Two issues per year as follows:<br />1^st issue: January<br />2^nd issue: July</p> </div> <div> <h3>Access and Publication Fees</h3> <p>The Suan Sunandha Rajabhat University Journal of Science and Technology (SSSTJ) are published by the Department of Science and Technology of Suan Sunandha Rajabhat University, Bangkok (Thailand) on a non-profit basis, offering the following:</p> <ul> <li>All articles published open access (free of charge) will be immediately and permanently free for everyone to read, download, copy and distribute</li> <li>No university library or individual reader have to pay a subscription fee or buy access to access the articles published in the journal</li> <li>Authors do not need to pay any article submission or processing charges</li> </ul> <h3>Reprints</h3> </div> <div> <p>Please contact <a href="mailto:ssstj.contact@gmail.com">ssstj.contact@gmail.com</a> for more information on how to get the reprints of journal.</p> </div> en-US ssstj.contact@gmail.com (Editorial Office, Journal of Science and Technology (SSSTJ)) panisara.ni@ssru.ac.th (panisara Nitutorn) Sun, 22 Feb 2026 21:10:14 +0700 OJS 3.3.0.8 http://blogs.law.harvard.edu/tech/rss 60 https://li02.tci-thaijo.org/index.php/ssstj/article/view/1285 <p>This study focuses on the optical and basic physical properties of samarium (Sm³⁺)-doped glasses prepared using calcium oxide (CaO) derived from mussel and cockle shells as glass network modifiers, and compares them with commercial CaO. X-ray fluorescence (XRF) analysis showed that the shell-derived CaO possessed high purity, with CaO content exceeding 99% after calcination at 900°C for 5 hours. X-ray diffraction (XRD) results revealed that prior to calcination, the primary phase in the shells was calcium carbonate (CaCO₃), while after heat treatment, the dominant phase transformed into calcium oxide (CaO). This indicates successful thermal decomposition of CaCO₃ and effective phase transition under the given conditions. In terms of optical properties, the shell-derived glass samples exhibited higher emission intensity and longer lifetimes compared to the commercial CaO sample. The density, refractive index, and molar volume values were comparable across all samples, suggesting that the use of shell-derived CaO does not significantly alter the physical properties of the glass. These results demonstrate the potential of shell-derived CaO as a sustainable alternative raw material for the production of luminescent glasses, contributing to environmentally friendly and cost-effective materials development.</p> Nuchjaree Kiwsakunkran, Natthakridta Chanthima, Nakarin Singkiburin, Anon Angnanon Copyright (c) 2026 Suan Sunandha Rajabhat University https://creativecommons.org/licenses/by/4.0 https://li02.tci-thaijo.org/index.php/ssstj/article/view/1285 Sun, 22 Feb 2026 00:00:00 +0700