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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Ilmiah Profesi Pendidikan
Sudirman
Universitas Mataram
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Materials Science & Nanotechnology Physics

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Analysis of the Calorific Value and Specific Gravity of Breadfruit Peel Bioalcohol (Artocarpus Altilis) as an Alternative Fuel at Various Distillation Temperatures Hendry Sakke Tira; Mirmanto; Iwanuddin; Salman; Sudirman
Jurnal Penelitian Pendidikan IPA Vol 9 No 7 (2023): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i7.2878

Abstract

The objective of this study was to investigate how distillation temperature affected the specific gravity (SG) and calorific value of bioalcohol derived from breadfruit peels (Artocarpus altilis) as an alternative fuel. The process of producing bioethanol from breadfruit peels begins with pretreatment of the peels, followed by hydrolysis with hydrochloric acid, fermentation, and finally distillation. The hydrolysis process used 20% hydrochloric acid in a volume of 25 ml, and the fermentation took 6 days with a mass of 30 gr of yeast Saccharomyces cerevisiae. The distillation process lasted two hours, with temperatures varying between 70, 80, and 90°C. This study yielded the highest alcohol content of 72.80% at 70°C and the highest volume of bioalcohol of 35.67 ml at 90°C. Meanwhile, the best Specific Gravity (SG) at 70°C was 0.8393. Furthermore, the calorific value test results revealed that the calorific value increased with increasing alcohol content. The highest calorific value obtained was 23003.406 J/gr, which was close to the ethanol calorific value of 29700 J/gr, while the lowest calorific value obtained was 22339.008 J/gr at a distillation temperature of 90°C
Pengembangan Media Pembelajaran Flashcard Augmented Reality Berbasis Aplikasi Assemblr EDU Pada Materi “Keragaman Budaya Indonesia” Kelas V SDN 29 Cakranegara Zulfikar Selang; Sudirman; Muhammad Tahir; Moh. Irawan Zain
Jurnal Ilmiah Profesi Pendidikan Vol. 10 No. 2 (2025): Mei
Publisher : Fakultas Keguruan dan Ilmu Pendidikan, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jipp.v10i2.3355

Abstract

Rendahnya hasil belajar siswa pada mata pelajaran Pendidikan Pancasila khususnya pada materi keragaman budaya Indonesia. Penelitian ini bertujuan untuk menghasilkan media pembelajaran flashcard augmented reality materi keragaman budaya Indonesia yang layak dalam proses pembelajaran dan mengetahui cara penggunaan media flashcard augmented reality untuk peserta didik kelas V SDN 29 Cakranegara. Keterbaharuan penelitian ini adalah menggunakan desain atau tampilan background yang lebih berwarna serta dilengkapi dengan berbagai jenis media yaitu teks, gambar maupun QR. Metode dalam penelitian ini menggunakan pengembangan model 4-D yang terdiri dari 4 tahap yaitu: tahap Define, Design, Develop and Disseminate. Hasil validasi kelayakan media dan kelayakan materi masing masing memperoleh 95% kategori sangat layak dan hasil angket respon guru 87,5% sangat praktis, hasil angket respon peserta didik memperoleh rata-rata 91,92% kategori sangat praktis. Dengan demikian dapat disimpulkan bahwa pengembangan media pembelajaran flashcard augmented reality berbasis aplikasi assemblr EDU materi keragaman budaya Indonesia pada kelas V SDN 29 Cakranegara dinyatakan sangat layak dan sangat praktis digunakan.
Synthesis and Characterization of Composites-Based Bacterial Cellulose by Ex-Situ Method as Separator Battery Maria Ulfa; Inda Noviani; Emmy Yuanita; Ni Komang Tri Dharmayani; Sudirman; Sarkono
Jurnal Penelitian Pendidikan IPA Vol 9 No 6 (2023): June
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i6.3819

Abstract

Many studies have been conducted and developed on cellulose-based battery separator materials, including bacterial cellulose, which has characteristics like plant cellulose. This research aims to synthesize BC/Al2O3 composite and analyze its potential as a battery separator. The synthesis of the composite with the ex-situ method is to immerse BC from tofu liquid waste (fermentation time variation of 6, 7, and 8 days) into Al2O3 suspension. The characterization results showed that the immersion of Al2O3 in BC can increase porosity, electrolyte absorption, and conductivity, indicating that the composite has the potential to be used as a battery separator.
Antibacterial Activity of Marine Sponge (Stylotella sp.) Ni Komang Tri Dharmayani; Isnaini; Maria Ulfa; Sudirman; Emmy Yuanita; Baiq Nila Sariningsih
Jurnal Penelitian Pendidikan IPA Vol 9 No 6 (2023): June
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v9i6.3839

Abstract

Sponges are marine biota that makes up coral reefs that live on the bottom of the waters and have an important role in marine ecosystems. Sponges have bioactive components that have not been widely used by the community. This study aimed to analyze the content of secondary metabolites and the antibacterial activity of the sponge Stylotella sp. antibacterial activity test against Gram-negative (-) Escherichia coli and Gram-positive (+) Staphylococcus aureus was carried out using the good diffusion method. The results of antibacterial testing with various concentrations of 50, 100, and 150 ppm of the isolates showed that the zone of inhibition against E. coli was 11.3; 12; and 13 mm while for S. aureus was 12.3; 13; and 14 mm. The results of antibacterial testing with a concentration of 600 ppm of sponge extract showed an inhibition zone on E. coli and S. aureus in the amount of 13.3 and 14 mm, respectively. The test results showed that the sponge extract and isolate were in the intermediate category and were resistant to E. Coli bacteria. and S. Aureus
Co-Authors Aisa Nikmah Rahmatih Baiq Nila Sariningsih Emmy Yuanita Hendry Sakke Tira Inda Noviani Intan Pandini Aci Isnaini Iwanuddin Maria Ulfa Mirmanto Moh. Irawan Zain Muhammad Tahir Salman Tri Dharmayani, Ni Komang Zulfikar Selang