Hydroxyapatite (HA) is a calcium phosphate compound that is used as a substitute for damaged body tissues, such as bone and dental implants. HA has been synthesized from the serai snail shells and the mangrove crab of west Tanjung Jabung, Jambi province using the dry method. Calcination of the shell at 1000 °C for 12 hours produces CaO, then contact of CaO with air produces Ca(OH)2 which is used as a source of calcium in HA synthesis. Milling time variations for 0 hours, 3 hours, and 6 hours. Sintering at 600 °C for 2 hours produces HA as characterized by using X-Ray Diffraction (XRD), Fourier Transform Infrared (FTIR), and particle size analysis using Particle Size Analyzer (PSA). HA which has the highest accuracy of lattice parameters is that which is milling for 3 hours. The diffraction pattern shows the formation of the HA phase accompanied by several other calcium phosphate phases at an angle of 2θ. The FTIR spectrum shows the presence of PO4
3- and OH−groups from HA. PSA analysis shows the longer the milling makes the smaller particle size.
Purpose of the study: This study aims to develop entrepreneurship-based learning video media on environmental pollution material and its application in science learning in junior high school.
Methodology: This research is classified as research and development using the ADDIE model, which consists of the stages of analysis, design, development, implementation, and evaluation. The subjects used were 24 students and 2 teachers to see responses to entrepreneurship-based learning videos using purposive sampling. Data analysis used descriptive statistics (Category, Min, and Max) and inferential (One paired t-test).
Main findings: In this study, the results of validation by material experts and validation by media experts were very feasible. The results of the science teacher's responses and student trials in one-on-one, small, and large group trials were obtained in the very good category. And there are significant differences for students in using Entrepreneurship-based learning videos
Novelty/Originality of this study: In the era of the industrial revolution and social revolution, human resources are needed to go through this. Therefore, especially in junior high schools, teachers must carry out innovations, one of which is to innovate in the learning media used, namely using entrepreneurship-based learning videos. Today's students must have an entrepreneurial spirit or attitude to compete in the present.
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