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All Journal Pendas : Jurnah Ilmiah Pendidikan Dasar Jurnal Ilmiah Pendidikan Scholastic
Rita Sundari
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Studi Perbanding Aktivitas Katalitik CaO Cangkang Telur Dengan Aktivasi Basa dan Asam Dalam Produksi Biodisel Randy Lesmana Putra; Budhi Oktavia; Sri Benti Etika; Suryelita Suryelita; Umar Kalmar Nizar; Rita Sundari
Jurnal Ilmiah Pendidikan Scholastic Vol 5 No 2 (2021): Jurnal Ilmiah Pendidikan Scholastic
Publisher : Fakultas Sastra Universitas Ekasakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36057/jips.v5i2.469

Abstract

Studi perbandingan aktivitas katalitik dari katalis CaO yang disintesis dari cangkang telur ayam dengan aktivator asam dan basa telah dipelajari. Aktivasi dengan basa dilakukan dengan metode impregnasi yaitu dengan memasukkan CaO kedalam larutan KOH. Aktivasi asam dilakukan dengan membuat komposit CaO dan karbon serta disulfonasi dengan asam sulfat pekat. Katalis CaO yang dihasilkan diaplikasikan dalam produksi biodisel dari minyak jelantah. Aktivitas katalitik ditentukan melalui uji produk biodisel yang dihasilkan. Hasil menunjukkan bahwa katalis yang dimodifikasi melalui impregnasi basa memiliki aktivitas katalitik yang tinggi dalam mengkonversi minyak jelantah menjadi biodisel. Meskipun katalis CaO tanpa modifikasi memiliki nilai densitas, laju alir dan bilangan asam lebih baik dari CaO-A dan CaO-A/CS, kedua katalis ini masih bisa dioptimasi dalam preparasi dan aplikasinya sebagai katalis dalam produksi biodisel.
VIDEO DIGITAL STORYTELLING BERBANTUAN BONEKA TANGAN PADA CERITA DONGENG KELAS 4 SEKOLAH DASAR Rita Sundari; Dwi Agus Setiawan; Denna Delawanti Chisyarani
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 10 No. 3 (2025): Volume 10 No3 September, 2025
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v10i3.29905

Abstract

The lom ability of students to understand and reconstruct fairy tales indicates the need for inovation in indonesian language learning media. The use of convetional methods makes students less active and makes it difficult to grasp the content and moral messages of the story . This study aims to develop a digital storytelling video media assisted by hand puppets that is feasible, partical, and effective for use in learning, especially to support students ability to retell the story and explore moral values. The study was conducted at SDN Tanjungrejo 1 Malang with 23 fourth-grade students as subjects, using qualitative and quantitative data approaches through the ADDIE Research and Development (R&D) model. The instruments used incluced expert validation sheets, teacher and student response questionnaires, observastion sheets, and pretests and postets. The product was developed in the form of a video entitled “Lyli Yang Sombong”, with hand puppet characters, presented in an attractive manner and uploaded on the Youtube platfrom for easy access. The validation results from material, languange, and media experts showed an average feasibility of 88,33% (feasible category). Field trials showed an increase in students active participation in learning. Students were more attentive, built imagination, and created emotional connections with the story characters. The pretest and posttest results showed significant results, with an average N-Gain of 0,81 (high category). Particality was also high, with teacher responses of 85% and 90% respectively. Thus, this medium has proven to be feasible, partical, and effective in teaching storytelling in elementary schools.
Co-Authors Budhi Oktavia Denna Delawanti Chisyarani Dwi agus setiawan Randy Lesmana Putra Sri Benti Etika Suryelita . Umar Kalmar Nizar