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Yulisa Lestari
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PELATIHAN DAN PENDAMPINGAN PRAKTIKUM MIKROBIOLOGI BAGI SISWA DAN GURU BIOLOGI TINGKAT SMA, KABUPATEN TOBA Berlian Simanjuntak; Roga Florida Kembaren; Merry Meryam Martgrita; Chintya Sinar Lumbantoruan; FBA Fitriani; Theodora M Putri; Adrianto Prihartantyo; Yulisa Lestari; Juli Yanti Damanik; Andrew Rolas Siagian; Endang Sibarani; Bastian Jose Habeahan; Reni Tamba; Ketty Tambunan; Elsa Pangaribuan; Gabriele Siagian
Jurnal Abdi Insani Vol 13 No 6 (2026): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v13i6.3922

Abstract

The training and mentoring of microorganism isolation and identification practicums wereconducted as an effort to provide learning integration experiences with practicum activitiesdue to the limited laboratory facilities in high schools in Toba Regency. The community serviceactivities began with an evaluation of initial understanding related to the community serviceactivities carried out, followed by the provision of basic theory on microorganism isolation andidentification. After that continued with practical activities of isolation and identification ofmicroorganisms carried out through aseptic techniques and mentoring in observations, datarecording, and analysis of practical observation results. The activity was concluded with a finalevaluation of the activity. Training and mentoring were carried out intensively so the studentsand teachers were able to carry out the stages and analysis of practical activities appropriately.The evaluation results showed that this activity increased the understanding of students andteachers of the basic theory and practical work of isolating and identifying microorganisms for66%. This training activity is also expected to be a strategic step to encourage high schools inToba Regency to have laboratory facilities to support the integration of learning materials withpractical activities.
The Effect of Raw Material Mixture Composition and Adhesive Concentration on Candlenut Shell (Aleurites molucanna) and Empty Palm Fruit Bunches (Elaeis guineensis jack) Biobriquette Quality Adrianto Prihartantyo; Yulisa Lestari; Aga Nugraha; Labora Roma
Jurnal Kartika Kimia Vol 9 No 1 (2026): Jurnal Kartika Kimia
Publisher : Department of Chemistry, Faculty of Sciences and Informatics, University of Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jkk.v9i1.968

Abstract

Biobriquettes serve as a renewable energy alternative with the potential to replace conventional charcoal while producing lower emissions. This study aimed to evaluate the effects of varying the ratio of raw material mixtures and the concentration of binder made from cassava starch on the quality of biobriquettes produced from candlenut shells (Aleurites moluccana) and empty palm oil fruit bunches (Elaeis guineensis jack). The selection of these raw materials was based on their abundant availability in Indonesia and their high lignocellulosic content. The biobriquettes were produced through a carbonization process, in which the candlenut shells were heated at 350°C for 30 minutes, while the palm oil empty fruit bunches were carbonized at 300°C for the same duration. The study applied variations in the composition ratios of candlenut shells to empty fruit bunches (100:0, 80:20, 60:40, 40:60, 20:80, and 0:100), as well as binder concentrations of 10%, 20%, and 30% (w/w) using cassava starch. The resulting biobriquettes were tested according to the Indonesian National Standard SNI 01-6235-2000 through proximate and physical analyses. The findings indicated that the variation.
Co-Authors ADRIANTO PRIHARTANTYO Aga Nugraha Andrew Rolas Siagian Bastian Jose Habeahan Berlian Simanjuntak Chintya Sinar Lumbantoruan Elsa Pangaribuan Endang Sibarani FBA Fitriani Gabriele Siagian Juli Yanti Damanik Ketty Tambunan Labora Roma Merry Meryam Martgrita Reni Tamba Roga Florida Kembaren Theodora M Putri