During the recent years, PM2.5 concentration is rising above the safety exposure limit in Thailand. PM2.5 could have originated from various sources such as exhaust fumes, open air burning, wildfire, etc. This concludes that all cities or places would have different PM source contributions. Most studies regarding the PM source findings were done based on chemical analysis. Our research team would like to predict the PM sources physically by nanostructures analysis. These methods would require the PM dust to be collected in a limited amount of time and dry. The use of paper filters may cause contamination from filter material which may cause errors in result evaluation. Our team suggests using Electrostatic Precipitator (ESP) where electrostatics is used to capture PM dust. This research mainly focuses on designing and building the ESP system for PM collection whereas the requirement is to collect at least 100 mg of PM dust within 1 day which would be adequate for nanostructure analysis. The study revealed that the customized ESP system could achieve of up to 80% collecting efficiency (which is more than the commercial ESP that we previously used), there’s a also a parametric study of relationships between flow velocity and collecting efficiency where collecting efficiency is inversely proportional to flow velocity. The suggested air velocity is not to exceed 2 m/s. However, there’re still more room for improvement of the ESP system for PM collection such as the convenience of PM collection process which resulted from the ESP construction geometry and sizes.
มลพิษทางอากาศนั้นส่งผลกระทบโดยตรงต่อสิ่งแวดล้อมและสุขภาพของสิ่งมีชีวิตทั้งในระยะสั้นและระยะยาว มลพิษทางอากาศนั้นสามารถจำแนกได้เป็นหลายกลุ่ม นั่นคือ มลพิษในรูปแบบสถานะแก๊ส ได้แก่ แก๊สโอโซน แก๊สไนโตรเจนออกไซค์ เป็นต้น และ มลพิษในรูปแบบของแข็ง ได้แก่ ฝุ่นละอองต่างๆ ซึ่งจะถูกจำแนกด้วยขนาดเป็นหลัก ในที่นี้ ฝุ่นละอองขนาดเล็ก (Particulate Matter) ตัวย่อ “PM” จะเป็นประเด็นสำคัญของงานวิจัยนี้เนื่องด้วยในปัจจุบัน สถานการณ์ฝุ่น PM2.5 ใน ประเทศไทยโดยเฉพาะภาคกลางและภาคเหนือ มีแนวโน้มที่จะรุนแรงขึ้นในฤดูหนาวของทุกปี
คณะสถาปัตยกรรม ศิลปะและการออกแบบ
When it comes to the general perception of death, it is often seen as something negative or inauspicious. However, the end or death of someone can sometimes be the beginning of change, influencing thoughts, lifestyles, and attitudes in a positive way for those around them. For students aged 13-18, accessing and understanding this topic remains a challenge. Most available information is often presented in complex forms that are difficult for young people to grasp. Moreover, teaching materials in schools often lack creativity and engagement, leading to a decline in students’ interest in this subject. To address this issue, a website has been designed as an accessible and creative resource. It aims to deepen young people's understanding of the impact of actions and the death of individuals on the world they live in, while inspiring them to become part of creating positive change for the future.
คณะบริหารธุรกิจ
CO Breathalyzer with Voice Response is the device to measured the level of CO residual in a person's lung who consume tobacco. Measuring residual CO in human breath can identify the tobacco addiction level instead of measuring nicotine in blood.
คณะอุตสาหกรรมอาหาร
Oral disintegrating films (ODFs) can dissolve in the mouth instantly upon contact with saliva, without the need for water. This study aimed to investigate the effect of sorbitol concentration on the properties of oral disintegrating films containing Capsicum Oleoresin extract, which has properties that stimulate saliva secretion, making swallowing easier. The film was developed to address difficulties in swallowing, especially for individuals with dysphagia. The films were prepared using different concentrations of sorbitol and tested for rheological properties, mechanical properties, moisture content, free water content, thickness, disintegration time, contact angle, color, and antioxidant activity. The results indicated that sorbitol played a key role in increasing the flexibility and reducing the brittleness of the films. Additionally, an optimal concentration of sorbitol helped maintain the stability of the Capsicum extract and enhanced its efficacy in stimulating saliva secretion, thereby making swallowing more convenient and reducing oral friction. The films developed in this study demonstrate potential as an alternative for individuals with swallowing difficulties.