PKRU SciTech Journal

A Study of the Quality of Chan Rong Honey Products in Songkhla Province

Poonyanuch Ruthirako — 2024-10-06

This study aimed to assess the quality of Chan Rong honey products in Songkhla Province, focusing on honey produced by community enterprises in the region. Our research involved a sample group comprising 25 community enterprises in Songkhla Province. The study encompassed an evaluation of both physical properties and microbial contamination. The results revealed that the pH values of the Chan Rong honey products ranged from 3.21 to 4.45, while the moisture content varied between 14.48% to 20.07%. Microbial contamination was also analyzed, including yeast and mold, Staphylococcus aureus, Salmonella sp., Bacillus cereus, and Clostridium perfringens in honey samples collected from the 25 community enterprise groups. Specifically, the findings indicated that yeast and mold levels ranged from less than 1 colony-forming unit per gram (CFU/g) to 9.0x10⁴ CFU/g. Staphylococcus aureus was detected at less than 1 CFU/g. Bacillus cereus was found in amounts less than 1 CFU/g, and Clostridium perfringens was present at levels below 1 CFU/g, while Salmonella sp. was not detected in any of the samples. These research outcomes hold valuable insights for enhancing the capacity of local communities in the development of high-quality, safe Chan Rong honey for consumers.

Orbital Period Change and Evolution of the Binary System V1851 Orionids

Thitipong Unchai — 2024-10-06

The research objective was to study the orbital period change of the variable star V1851 Orionids using a 0.2-meter reflecting telescope with a DSLR camera in the visible light band. A photometric system was used to observe the light curve and the primary minimum eclipse. The results indicated that the orbital period of V1851 Orionids is 0.2702 (±0.0028) days. The O – C diagrams of the light curve showed that the orbital period decreased by 1.2340 ´10^-11 (±0.0001´10^-11) day/cycle, or 1.4062´10^-3 (±0.0001´10^-3) second/year, influenced by the thermal relaxation oscillation process in the closed binary system.

The Development of a Coffee Bean Moisture and Temperature Measuring Device by Using Internet of Things

Chulawalee Maneelert — 2024-10-06

This research aimed to develop a device for measuring the moisture and temperature of coffee beans and to test its efficiency. We developed a prototype of the device along with an information system to display the measurement results. The device comprised a moisture sensor and a temperature sensor, which measured the values, transferred the data to a cloud server, and presented the findings through the information system. The differences in test results between the humidity sensor and the EE-KU machine, as well as between the temperature sensor and the digital thermometer (TP101), were not statistically significant at the 0.01 level. The device accurately measured the moisture and temperature of coffee beans and displayed the results on a mobile application installed on mobile devices, as well as a web application accessible to users. This application allows users to create additional user accounts and includes a database for gathering seller information. In terms of cost, the developed device is less expensive than commercially available devices, which cannot be used online and only display the results on the machine’s screen. Moreover, the developed device is smaller, lighter, and more portable than commercially available alternatives. Maintenance is also feasible, as the equipment can be easily sourced domestically at a low cost.