This research aimed to study the optimum conditions for making raw lime from shells which consisted of 9 conditions: calcined at three levels of 700 800 and 900 degrees Celsius for 1 2 and 3 hours. Calcium element content in raw lime using X-ray fluorescence (XRF) measurement and structural analysis of calcium compounds by X-Ray Diffraction (XRD). The research results were found. 1. Optimal conditions for making lime mortar are temperature 800 degrees Celsius duration 2 hours. The physical characteristics of raw lime are white and porous. 2. The calcium content from the shells calcination at 800 degrees Celsius for 1 2 and 3 hours was 98.22% 96.70% 97.89%. 3. Changes in the calcium compounds of raw lime obtained by calcining the shell at 800 degrees Celsius for 1 hour were mainly found in the form of calcium carbonate (CaCO3). At 2 3 hours calcium carbonate (CaCO3) is mostly converted to form calcium hydroxide (Ca(OH)2)compound calcium oxide (CaO) compound is formed.

This research aimed to study students opinions towards the Cheer and Admission Conference and present a creative recruitment model for students of the Faculty of Science and Technology Rajamangala University of Technology Phra Nakhon. The sample group was undergraduate students of The Faculty of Science and Technology Rajamangala University of Technology Phra Nakhon with 376 students studying in 2019. The data collection tools were questionnaires of students opinions on the activities. Cronbachs alpha coefficient was used to examine the whole questionnaires reliability yielding a value of 0.83. A statistical package for analyzing data collected from January to February 2020 was used with the statistics mean standard deviation t-test and one-way analysis of variance (ANOVA). The research results found that: 1. The Pros and Cons of students’ opinions on the freshman orientation activities and cheer meetings were that freshmen get to know friends and seniors; freshmen are afraid of juniors and seniors. 2. Male and female students had different opinions about organizing activities for freshman recruiting and cheered meeting. 3. Students studying in different disciplines had no different opinions on organizing new freshman activities and cheer meeting. 4. Students studying in different year levels had the same opinion on organizing new recruiting activities and cheer meeting. 5. Features of the creative recruiting activities format are as follows: 5.1 It is an activity that gives importance to safety and respect for personal freedom. 5.2 It is the responsibility of the Faculty to closely watch this field of study 5.3 It is an activity that promotes pride in being a student at the university. 5.4 It is an activity that helps students to adjust to university life and aims to foster a good relationship between students seniors and juniors. 5.5 An outside activity must be an event organized by a faculty or university department only.

This project Online Consulting System Design and Technology Information service Project for Clinic Technology of Research and Development Institute Rajamangala University of Technology Phra Nakhon aims to design consulting system and online technology information services for Clinic Technology of Research and Development Institute Rajamangala University of Technology Phra Nakhon. The in-built system facilitates quick communication get the information and can deliver technology information on demand in order to respond to the service recipients as quickly as possible. Moreover it reduces the coordination process and paper usage able to collect statistics and information as per service recipients need as well as technology and knowledge that are ready to be transferred. The data storage is well-organized by using ASP.NET C # HTML Java and Microsoft Sql Server 2012 in system design. The results of the satisfaction evaluation towards the efficiency of the system from 226 people found that the overall satisfaction was the highest with the mean at 4.68. This shows that online consulting system and technology information service project for Clinic Technology of Research and Development Institute Rajamangala University of Technology Phra Nakhon can be used to provide consulting and technology information services to service recipients.

Broken rice of Thai cross breed black rice Riceberry was an under-utilized agricultural by-product that contains high content of anthocyanins the multiple health benefits flavonoid. In this study these anthocyanins were used to develop healthy dark hocolates. The anthocyanin extract from the broken Riceberry rice was prepared into anthocyanin powder using freeze-drying technique in which maltodextrin was used as a carrier material. Healthy dark chocolates were prepared by replacing cocoa powder with anthocyanin powder by 5 10 and 15 g/g cocoa powder which respectively delivers DC5 DC10 and DC15 anthocyanin-fortified dark chocolate bars. The color analysis showed no blooming (undesired white color at the chocolate surface) in all chocolates. The increase the anthocyanin powder content significantly decreased the hardness of the dark chocolates (33.9-27.2 N). Total anthocyanin content (TAC) in the dark chocolates increased respectively as anthocyanin powder content increased. The health benefit of the anthocyanin-fortified dark chocolates was improved as the DPPH antioxidant activity of all treatments was 4-9% higher than that of the control DC0. Sensory evaluation revealed that DC10 received higher liking scores (6.4-7.5) than the DC0 indicating more consumer preference. The anthocyanin-fortified dark chocolate delivers an alternative strategy to improve the health property of chocolates. This application of anthocyanin from the broken Riceberry rice could help increase the value and the utilization of Thai agricultural by-product.

Metal casting with Green sand mold is essential for participation in the manufacturing industry that requires natural resources and chemicals as an element. This research studied the effects of the right mix of mangosteen shell powder on green sand mold. The objective is to study and analyze the mixture of moist sand formations consisting of natural sand bentonite mangosteen shell powder and water affecting the properties of green sand mold by experiment method. Starting from studying relevant information of natural materials that affect sand mold and planning experimental design by using the experimental design program for the trial version in the experimental design and analyze results. The results showed that mangosteen peel powder had an effect on the properties Compression strength and higher hardness of sand mold but does not increase the ability to release a lot of air permeability The optimum blend ratio was composed of 90% reused sand 7% bentonite 1% water and 2% mangosteen powder by weight air permeability. The hardness of the sand casting was 0.71 kg/cm2 47.36 and 94.06 Scale B respectively.