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All Journal Jurnal Pendidikan dan Pembelajaran Khatulistiwa (JPPK) Journal of Technique Research (JTR)
Mirawati, Isra
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Education Engineering Languange, Linguistic, Communication & Media Mathematics Other

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KELARUTAN PIGMEN MERAH DAN BIRU ANORGANIK DALAM GELASI MIKROEMULSI WATER IN OIL DARI SISTEM AIR, TRITON X-100 DAN SIKLOHEKSANA UNTUK TINTA BALLPOINT Mirawati, Isra
Journal of Technique Research (JTR) Vol 1 No 2, Juli (2019): Journal of Technique Research (JTR)
Publisher : rc-institut

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The research for the solubility of red and blue pigments in microemulsion water in oil system, Triton X-100 and Cyclohexane has been done. The purpose of this research is preparation of gels from the  microemulsion water in oil and determine the solubility of red and blue inorganic pigment in gel from water in oil system, Triton X-100 and cyclohexane. The preparation of gel have done by the sol-gel method. Sol-gel is a process of forming inorganic compounds through chemical reactions in solutions at low temperatures. The formation of a gel from the water in oil microemulsion is carried out with the addition of the Tetra ethyl orto silicate and ethanol. The amount of the Tetra Ethyl ortho is added that is 1:8 comparison of  mol to the amount of water in the microemulsion water in oil. Tetra Etylortho is subjected to hydrolysis with water forming gel. While ethanol serves as a TEOS organic solvent in the formation of gels. The result of  gels are semi-solid and have the ability to dissolve inorganic pigments larger than microemulsions. The average solubility of red pigment on the gel water system, triton X-100, and cyclohexane is 3.98 mg/g while the microemulsion is 1,67 mg/g, and black pigment solubility is 3,75 mg/g while the microemulsion is 1,175 mg/g.  
PENGEMBANGAN LKPD BERBASIS DISCOVERY LEARNING SUBMATERI JANTUNG DAN PROSES PEREDARAN DARAH MANUSIA DI SMA Mirawati, Isra; Ningsih, Kurnia; Panjaitan, Ruqiah Ganda Putri
Jurnal Pendidikan dan Pembelajaran Khatulistiwa Vol 8, No 6 (2019): JUNI 2019
Publisher : Jurnal Pendidikan dan Pembelajaran Khatulistiwa

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AbstractThis study is aimed to develop Student Worksheet based on discovery learning on the sub-lesson about heart and human circulatory process, as well as to discover students’ responses to the product developed. Research and Development (R&D) conducted consists of 7 stages: research and data collection, planning, product draft development, limited product testing, revision, main field test, and revision to the operational product. The product was approved by 2 validators to measure the feasibility by evaluating the contents, language, course, and graphic aspects. The test was done to determine the students’ responses in the cognitive, affective, and conative aspects. The subjects in this study are the 11th-grade Mathematics and Natural Sciences students of SMAN 7 Pontianak, MAN 1 Pontianak, and SMA Mujahidin Pontianak. The validation of each aspect showed a value of 1.00, categorized as very high. Limited trials showed that the averages of cognitive, affective, and conative dimensions were respectively 83.33%, 80.86%, and 84.44%, as well as the main field test averaged respectively 83,71%, 81,17%, and 84,16%. Therefore, the Student Worksheet based on discovery learning is feasible to be used as the teaching material. With very strong responses, determined that the response given by the learners is highly positive. Keywords: Discovery Learning, Heart and Human Circulatory Process, Response, Student Worksheet.
Co-Authors Kurnia Ningsih Ruqiah Ganda Putri Panjaitan