https://li04.tci-thaijo.org/index.php/psj <p><strong>ISSN: 3088-2222 (Online)</strong></p> <p>The journal aims to disseminate academic work to external organizations and promote academic advancement across various fields. It also serves as a platform for building networks for the dissemination of scholarly information. The journal focuses on the biological sciences (biology, biochemistry, genetics and molecular biology, immunology, microbiology, and biotechnology), agricultural sciences (plant science, animal science, veterinary science, fisheries, agricultural technology and innovation), and other related fields. The journal is published twice a year: Issue 1 (January–June) and Issue 2 (July–December)</p> <p><strong>Objectives of the Journal</strong></p> <p>1. To disseminate research and academic articles in the main fields of biological sciences, agriculture, and technology.<br />2. To create academic networks among educational institutions and relevant professional institutions.</p> <p><strong>Scope of the Journal<br /></strong></p> <p>The Journal of Biological Sciences, Agriculture, and Technology publishes research and academic works in the fields of biological sciences (biology, biochemistry, genetics and molecular biology, immunology, microbiology, and biotechnology) and agricultural sciences (plant science, animal science, veterinary science, fisheries, and agricultural technology and innovation).</p> <p> </p> en-US <p>ข้อความลิขสิทธิ์ เติมด้วยค่ะ</p> journal_sci@pnu.ac.th (ผศ.ดร.นรารัตน์ วัฒนาพันธ์) journal_sci@pnu.ac.th (นางสาวอาภรณ์ นงรัตน์ ) Thu, 11 Jun 2026 17:43:15 +0700 OJS 3.3.0.8 http://blogs.law.harvard.edu/tech/rss 60 https://li04.tci-thaijo.org/index.php/psj/article/view/8687 <p>Temperature and egg storage duration play an important role in determining the shelf life of eggs. This study aimed to investigate the effects of egg storage temperature and egg storage duration on the quality of eggs produced by commercial laying hens raised under free-range conditions. This study employed a 2 × 8 factorial experiments arranged in a completely randomized design. The first factor was egg storage temperature, and the second factor was egg storage duration. There were five replications for each treatment combination. Data were collected on egg weight, percentage weight loss, egg shape, and egg quality. The results showed that the interaction between egg storage temperature and egg storage duration significantly affected yolk height, yolk diameter, and yolk index (P &lt; 0.05). Egg storage temperature significantly affected percentage egg weight loss, albumen height, and Haugh unit (P &lt; 0.05), whereas egg storage duration significantly affected percentage egg weight loss (P &lt; 0.05). These findings indicate that refrigerated storage slowed the deterioration of egg quality in eggs produced by free-range laying hens more effectively than storage at room temperature under actual conditions.</p> kanok Chaovapasee, Aikrom Pakjik, Ruslan Asae, Afis Dmealee, Humaiden Hajimusa, Arraya Jeanmas, Nirandorn Nakdaeng Copyright (c) 2026 Journal of Life Science Agriculture and Technology https://creativecommons.org/licenses/by-nc-nd/4.0 https://li04.tci-thaijo.org/index.php/psj/article/view/8687 Thu, 11 Jun 2026 00:00:00 +0700 https://li04.tci-thaijo.org/index.php/psj/article/view/9216 <p><em>Litsea glutinosa</em> (Lour.) is a local plant found in the lower southern region of Thailand. Essential oil derived from <em>L. glutinosa</em> possesses medicinal properties but is relatively expensive. In order to reduce the cost of importing essential oils and to lower production costs, this research aimed to investigate the most suitable method for extracting essential oil from <em>Litsea</em> leaves with the highest efficiency. Four different extraction methods were compared: Ethanol Extraction (soaking in 95% ethanol), Accelerated Solvent Extraction, Steam Distillation, and Hydro Distillation. The results showed that the most optimal condition was Hydro Distillation of <em>L. glutinosa</em>, using a ratio of 500 grams of dried <em>L. glutinosa</em> leaves to 3,500 milliliters of distilled water, for a duration of 3 hours. This yielded 1 milliliter of essential oil, representing an essential oil yield of 0.2% (v/w). This method is low-cost and well-suited for further application in the health and personal care industry.</p> Suphaporn Tesvichian, Nureeyah Nicha, Pongpan Suksupan, Supaluk Kasawapat Copyright (c) 2026 Journal of Life Science Agriculture and Technology https://creativecommons.org/licenses/by-nc-nd/4.0 https://li04.tci-thaijo.org/index.php/psj/article/view/9216 Sat, 13 Jun 2026 00:00:00 +0700