This experiment aimed to study the suitable types of polymers for coating with chlorophyll extract and the quality of cucumber seeds after coating. The experiment was planned using a Completely Randomized Design (CRD) with four replications, consisting of five methods involving seeds coated with different types of polymers: Polyvinylpyrrolidone, Sodium Alginate, Carboxy Methyl Cellulose, and Hydroxypropyl Methylcellulose, each polymer being coated alongside chlorophyll, with uncoated seeds serving as the control method. The coating substance was prepared by extracting chlorophyll from mango leaves, then mixed with each type of polymer at a concentration of 1%, using an 8% concentration of chlorophyll extract. The properties of each coating method, such as pH and viscosity of the coating substance, were examined before coating the cucumber seeds with a rotary disk coater model RRC150 at a coating rate of 1,100 milliliters per 1 kilogram of seeds. Subsequently, the seeds were dried to reach the initial moisture level using a hot air blower, and seed quality was assessed in various aspects, including seed moisture, germination rate under laboratory conditions, germination index, and seed fluorescence under a portable ultraviolet light illuminator, as well as light emission spectrum analysis using a Spectrophotometer. The experiment found that each type of polymer could be used to form a film together with chlorophyll, which had appropriate pH and viscosity for the coating without affecting seed quality and showed fluorescence on the seed surface both under portable ultraviolet light and spectral emission analysis with a Spectrophotometer. Using HPMC as the film-forming agent with chlorophyll was the most suitable method, enhancing seed fluorescence efficiency.
สารเรืองแสงที่นิยมใช้เคลือบเมล็ดพันธุ์ในปัจจุบันมีหลายชนิด เช่น Rhodamine B, Curcumin, Auramine O แต่สารเหล่านี้บางชนิดหากใช้ไปเป็นเวลานานอาจเป็นพิษต่อร่างกายมนุษย์ หากสะสมในร่างกายอาจก่อให้เกิด oxidative stress ซึ่งกระตุ้นให้เซลล์เกิดการเสียหาย เพิ่มความเสี่ยงของโรคบางอย่างได้ ในงานวิจัยนี้จึงเลือกใช้สารสกัดจากธรรมชาติมาใช้เคลือบเมล็ดพันธุ์ คือ สารสกัดคลอโรฟิลล์ มีข้อดี คือ หาได้ง่าย มีวิธีการสกัดที่ไม่ซับซ้อน แต่ข้อจำกัดของสารสกัดคลอโรฟิลล์คือมีความสามารถในการเคลือบร่วมกับพอลิเมอร์ได้บางชนิด อาจทำให้ประสิทธิการเรืองแสงมีคุณภาพลดลง ดังนั้นการวิจัยนี้จึงมีวัตถุประสงค์เพื่อหาชนิดของพอลิเมอร์ที่เหมาะสมในการนำมาเคลือบร่วมกับสารสกัดคลอโรฟิลล์แล้วไม่ส่งผลต่อประสิทธิภาพการเรืองแสงและคุณภาพของเมล็ดพันธุ์
วิทยาลัยนวัตกรรมการผลิตขั้นสูง
Ultrasonic cleaning tank is a machine that many factories widely used to clean objects. At one factory, a problem occurred in the cleaning process, resulting in the factory not being able to clean objects, but cracks also appeared on some objects. It was anticipated that these were caused by uneven acoustics pressure distribution which resulted in unsuitable cavitation This directly affected cleaning performance within the tank. In order to improve the tank's efficacy, in this research, we use Harmonic Response Analysis in ANSYS simulate simulate the occurrence of acoustic pressure in the tank to find the appropriate conditions of factors affected the intensity and the distribution pattern of acoustic pressure in ultrasonic tank, including the position of object, power, ultrasonic frequency and a suitable type and placing position of the transducer for the tank. Reliability of the simulate results was validate by the actual result from the foil corrosion test and the ultrasonic power probe. We found that objects receive different pattern of corrosion at each location. When temperature increasing the intensity of cavitation was increased. When we increase the ultrasonic frequency, acoustic pressure that is evenly dispersed throughout the tank.
คณะเทคโนโลยีการเกษตร
Currently, urban agriculture is gaining increasing attention as it helps enhance food security and expand green spaces in cities. However, some people remain uninterested in urban farming, possibly due to living in urban areas or having limited space, making them perceive agriculture as something distant from their daily lives. The development of an urban agriculture card game aims to promote learning about urban farming through an engaging and enjoyable gameplay experience.
คณะสถาปัตยกรรม ศิลปะและการออกแบบ
A Photographic series that expresses the abstract states of myself, towards the question of existence that results from being surrounded by expectations of both surrender and freedom of expression, this series focuses on my own subjectivities in order to bring back memories of almost forgotten feelings and make them clear once more.