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All Journal Jurnal Elemen Kimia Karya Nyata: Jurnal Pengabdian Kepada Masyarakat
Sinta Trisnawati
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Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Economics, Econometrics & Finance Education Law, Crime, Criminology & Criminal Justice

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PEMANFAATAN BIJI NYAMPLUNG (CALOPHYLLUM INOPHYLLUM L) SEBAGAI BAHAN BAKU BIODIESEL DENGAN VARIASI SUHU DAN WAHTU PADA PROSES TRANSESTERIFIKASI Sinta Trisnawati; Endang Dwi Siswani
Jurnal Elemen Kimia Vol 7, No 2 (2018): Jurnal Kimia Dasar
Publisher : Universitas Negeri Yogyakarta

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ABSTRAKTujuan pada penelitian ini untuk mengetahui rendemen biodiesel, karakter biodiesel yangdihasilkan meliputi spektra IR, massa jenis, viskositas, bilangan asam, kadar air, dan kalorpembakaran, serta kesesuaian karakter bidoesel menurut SNI 7182:2015. Metode yang dilakukanyaitu mereaksikan minyak nyamplung dengan metanol dan KOH pada suhu 45, 55, 65˚C selama 60,dan 120 menit, perbandingan minyak:metanol 1:12 b/b. Rendemen biodiesel yang dihasilkan berkisarantara 65,15 sd 71,7%. Karakterisasi hasil sintesis memberikan nilai massa jenis biodiesel BB, BC, BE,BF sesuai dengan SNI yaitu 888,07; 887,12; 889,14; dan 887,87 kg/m3. Pada viskositas yangmemenuhi standar yaitu pada biodiesel BF yaitu 4,676 cSt. Bilangan asam semua biodiesel telahmemenuhi standar yang ditetapkan. Untuk kadar air pada biodiesel BB, BC, BE, BF telah memenuhistandar yaitu 0,004; 0,022; 0,003; dan 0,003%-volume. Untuk kalor pembakaran semua biodieselyang dihasilkan belum memenuhi standar yang ditetapkan. Gugus fungsi yang terkandung didalambiodiesel adalah C=O, C-O ester, ester asam lemak, C-H dan metilen.Kata kunci : lama pengadukan, minyak biji nyamplung, minyak biodesel, suhu, transesterifikasi
Pendampingan Guru PAUD Alamanda dalam Penerapan Play Based Learning untuk Pengenalan Warna pada Anak Usia Dini di Desa Padamaju Eva Manfaatin; Imas Masitoh; Alfa Rohmatin; Lelis Nuramalia; Raihana Ahlush Shuffah; Ira Faoza; Sinta Trisnawati
Karya Nyata : Jurnal Pengabdian kepada Masyarakat Vol. 2 No. 3 (2025): September : Karya Nyata : Jurnal Pengabdian kepada Masyarakat
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62951/karyanyata.v2i3.2179

Abstract

Early childhood education is a fundamental stage in shaping children's cognitive, social, emotional, and motor development. However, learning practices in many early childhood institutions still rely on conventional methods that make children passive and less engaged. This community service program was implemented at PAUD Alamanda in Padamaju Village with a focus on introducing color concepts through play-based learning strategies. The objective of this program was to enhance the quality of science learning that is more interactive, enjoyable, and developmentally appropriate, while also strengthening teachers’ capacity in designing innovative learning strategies. The method applied was Participatory Action Research, conducted in several stages including observation and coordination, teacher training, implementation of play activities with children, and reflection and evaluation. The results revealed that children became more enthusiastic, successfully recognized primary and secondary colors, and demonstrated improvements in fine motor skills, creativity, and social interaction. Teachers also gained new insights into the application of more varied and innovative teaching methods. Overall, this program successfully bridged the gap between early childhood education theories emphasizing play-based learning and classroom practices, and contributed positively to the improvement of early childhood education quality.
Co-Authors Alfa Rohmatin Endang Dwi Siswani Eva Manfaatin Imas Masitoh Ira Faoza Lelis Nuramalia Raihana Ahlush Shuffah