Mangosteen peel (Garcinia mangostana Linn.) extract using hot water (MPE) has been shown to have antibacterial potential in freshwater sea bass (Lates calcarifer) larvae infected with Aeromonas hydrophila. In vitro studies showed that MPE has a minimum inhibitory concentration (MIC) of 25 ppm and a minimum bactericidal concentration (MBC) of 25 ppm. In vivo, sea bass larvae were immersed in various concentrations of MPE at 0 ppm (control), 20 ppm, 40 ppm and 60 ppm, respectively, for 7 days with A. hydrophila. The results showed that the MPE-treated group had a higher survival rate compared to the control group. Hematological parameters showed that the MPE-treated group had significantly increased red blood cell (RBC), white blood cell (WBC) and hemoglobin (Hb) concentrations compared to the control group. In addition, the water quality parameters were not significantly different, except for ammonia concentration, with MPE having an ammonia concentration of 60 ppm being the lowest. All results can indicate that MPE can improve the antibacterial potential and the culture potential of sea bass larvae.
ปลากะพงขาว (Lates calcarifer) เป็นปลาที่ได้รับความนิยมมากที่สุดในอุตสาหกรรมการเพาะเลี้ยงสัตว์น้ำของไทย โดยเลี้ยงในน้ำจืดและน้ำกร่อย คิดเป็น 95.97% ของพื้นที่เพาะเลี้ยงปลาทะเลทั้งหมด ความสามารถในการปรับตัวและความง่ายในการเลี้ยงในน้ำจืดทำให้ตอบสนองความต้องการได้สูง แต่ยังประสบปัญหาโรคที่เกิดจากแบคทีเรีย เช่น Aeromonas hydrophila ซึ่งก่อให้เกิดโรคร้ายแรงและต้องการวิธีป้องกันที่เป็นมิตรต่อสิ่งแวดล้อม เปลือกมังคุด (Garcinia mangostana Linn.) ที่อุดมไปด้วยสารออกฤทธิ์ทางชีวภาพ แสดงคุณสมบัติต้านแบคทีเรียและเสริมภูมิคุ้มกันในสัตว์น้ำ จากการศึกษาพบว่าเปลือกมังคุดมีประสิทธิภาพในการต้านเชื้อโรคในปลา เช่น Vibrio harveyii และ A. hydrophila ซึ่งเป็นทางเลือกที่ยั่งยืนในการจัดการโรคในฟาร์มปลากะพงขาว
คณะวิศวกรรมศาสตร์
ยานยนต์ไฟฟ้าดัดแปลง
คณะวิศวกรรมศาสตร์
Motor control is a critical process for muscle contraction, which is initiated by nerve impulses governed by the motor cortex. This process is vital for performing activities of daily living (ADLs). Consequently, a disruption in communication between the brain and muscles, as seen in various chronic conditions and diseases, can impair bodily movement and ADLs. Evaluating the interaction between brain function and motor control is significant for the diagnosis and treatment of motor control disorders; moreover, it can contribute to the development of brain-computer interfaces (BCIs). The purpose of this study is to investigate brain activation in designed upper extremity motor control tasks in regulating the pushing force in different brain regions; and develop investigation methods to assess motor control tasks and brain activation using a robotic arm to guide upper extremity force and motor control. Eighteen healthy young adults were asked to perform upper extremity motor control tasks and recorded the hemodynamic signals. Functional Near-Infrared Spectroscopy (fNIRs) and robotic arms were used to assess brain activation and the regulation of pushing force and extremity motor control. Two types of motion, static and dynamic, move along a designated trajectory in both forward and backward directions, and three different force levels selected from a range of ADLs, including 4, 12, and 20 N, were used as force-regulating upper extremity motor control tasks. The hemodynamic responses were measured in specific regions of interest, namely the primary motor cortex (M1), premotor cortex (PMC), supplementary motor area (SMA), and prefrontal cortex (PFC). Utilizing a two-way repeated measures ANOVA with Bonferroni correction (p < 0.00625) across all regions, we observed no significant interaction effect between force levels and movement types on oxygenated hemoglobin (HbO) levels. However, in both contralateral (c) and ipsilateral (i) PFC, movement type—static versus dynamic—significantly affected brain activation. Additionally, cM1, iPFC, and PMC showed a significant effect of force level on brain activation.
คณะอุตสาหกรรมอาหาร
The study investigated the extraction of astaxanthin-rich oil from shrimp waste biomass, a valuable byproduct rich in functional lipids and proteins. Wet rendering has long been an inexpensive method to extract oil, however the high temperatures and long cooking times negatively affect the amount of astaxanthin. On the other hand, the study looked into employing deep eutectic solvent as a green solvent and combining a wet rendering process with high-shear homogenization and high-frequency ultrasound-assisted extractions. DES-UAE at 60% amplitude and wet rendering at 60 °C were found to be the ideal conditions, as were DES-HAE at 13,000 rpm and wet rendering at 60 °C. With a notable increase in oil yields of 16.80% and 20.12%, respectively, and improved oil quality (lower acid and peroxide values) in comparison to the conventional wet rendering, experimental validation validated the effectiveness of the DES-HAE and DES-UAE procedures. DES-UAE notably raised the amount of astaxanthin. This study demonstrates that DES-HAE and DES-UAE are quicker, lower-temperature substitutes for obtaining premium, astaxanthin-rich shrimp oil, resulting in more effective use of this priceless byproduct.