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All Journal Jurnal Impresi Indonesia J-Abdimas Cenderawasih
Frans Deminggus
Brawijaya University and Department of Chemistry, Cenderawasih University, Kampus Baru, Waena, Jayapura, Indonesia
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Pelatihan Penggunaan Virtual Chemistry Laboratory dalam Pembelajaran Bagi Calon Guru Kimia Amsad, Lusia Narsia; Jukwati; Deminggus, Frans
J-Abdimas Cenderawasih Vol. 2 No. 1 (2024): Volume 2 Nomor 1 Tahun 2024
Publisher : Universitas Cenderawasih

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Abstract

The training is descriptive research that describes the results of implementing the Virtual Chemistry Lab for all prospective chemistry teachers, as well as general science skills. The research subjects for this topic are second and third year chemistry students who have completed basic chemistry courses. This activity lasted for two days and began with the introduction stage of the Chemcollective Virtual Chemistry Lab software, then continued with the implementation stage, especially the application of the use of the Virtual Chemistry Lab and evaluation of its implementation. The results obtained show that students' ability to apply software is quite good and their ability to acquire general scientific skills is around 80% and student responses are very positive at 89%.
Analisis Kualitas Air dan Kandungan Logam Berat Timbal (PB) pada Air Laut di Perairan Pelabuhan Kelas II Jayapura Papua Bwefar, Marsia Isa; Sepriyanto Jenmau, Irja; Suaka, Irwandi Yogo; Deminggus, Frans; Rahail, Yohannes
Jurnal Impresi Indonesia Vol. 4 No. 12 (2025): Jurnal Impresi Indonesia
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jii.v4i12.7343

Abstract

This study aims to analyze water quality and heavy metal lead (Pb) content in the waters of Class II Port of Jayapura, Papua. Increased port and industrial activities in coastal areas can contribute to environmental pollution, including heavy metal contamination that impacts marine ecosystems and the health of coastal communities. This research employed a descriptive method with water sampling at 2 stations, each consisting of 3 sub-stations using purposive sampling technique. Seawater samples were analyzed at the Chemistry Education Laboratory of Cenderawasih University using Atomic Absorption Spectrophotometry (AAS). Water quality parameters measured included temperature, pH, Dissolved Oxygen (DO), transparency, and salinity. The results showed that water quality parameters were within safe ranges according to quality standards, with temperature ranging from 30.2-32.5°C, pH 6.54-7.60, DO 5.45-8.55 mg/l, transparency 3.20-3.57 meters, and salinity 30-34. However, the heavy metal lead (Pb) content in seawater ranged from 0.115-0.141 mg/l, which exceeded the established quality standard limit of 0.05 mg/l based on Government Regulation Number 22 of 2021 and Minister of Environment Decree Number 51 of 2004. This research indicates that port activities such as loading and unloading of goods, ship washing, fuel usage, fuel spillage, and use of ship coating paint can affect the level of lead in the waters. Special attention and strict supervision of port activities are required to minimize heavy metal pollution in the waters of Jayapura Port.
Optimalisasi Keterampilan Proses Sains pada Analisis Titrimetri dan Gravimetri bagi Peserta Didik SMK Negeri 8 Kota Jayapura Amsad, Lusia Narsia; Jukwati; Deminggus, Frans; Nurohman, Rahmat; Sawaki, Celine D
J-Abdimas Cenderawasih Vol. 3 No. 2 (2025): Volume 3 Nomor 2 Tahun 2025
Publisher : Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31957/jabdimascenderawasih.v3i2.5132

Abstract

The gap between theory and laboratory practice often presents a major obstacle in vocational education, particularly within the industrial chemistry competency. This community service initiative was established to bridge this disparity by strengthening the Science Process Skills (SPS) of students at SMK Negeri 8 Jayapura through technical training in Titrimetric and Gravimetric analysis. The implementation method adopted an experiential learning approach, encompassing conceptual presentations, interactive discussions, and direct experimentation. This intervention was designed to cultivate skills in observation, precision measurement, and data interpretation. Evaluation results demonstrated a significant surge in cognitive competence, marked by a 32.3% increase in average test scores. In the psychomotor domain, the majority of students were able to demonstrate analysis techniques with high precision (error <3%). These findings indicate that intensive supervision with an adequate instructor-to-student ratio is effective in building standardized laboratory competencies.
Implementasi Metode Eksperimen Sederhana dalam Pengenalan Sains Kimia untuk Menstimulasi Kognisi Anak Usia Dini di Pelnap Pisga Abepura Amsad, Lusia Narsia; Nurohman, Rahmat; Deminggus, Frans; Pasaribu, Arta Indah
J-Abdimas Cenderawasih Vol. 3 No. 2 (2025): Volume 3 Nomor 2 Tahun 2025
Publisher : Universitas Cenderawasih

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31957/jabdimascenderawasih.v3i2.5133

Abstract

Early childhood science education plays a vital role in shaping children's cognitive structures, literacy, and numeracy. However, the general perception of chemistry as a complex discipline often acts as a barrier to its introduction at the elementary level. This community service activity aims to destigmatize this perception by introducing chemical science using simple, joyful learning experiment methods. The program was conducted at the Pentecostal Children's Service (PELNAP) of GPdI PISGA, Abepura, targeting the 5-12 age group. The intervention was carried out through two main experimental modules: volcanic eruption simulation and balloon inflation via chemical gas reaction. The implementation methods included demonstration stages, guided independent experiments, and participatory observation. The results showed a significant increase in children's attention and intrinsic interest in scientific phenomena. Through an inquiry-based approach, children were able to understand the basic concepts of acid-base reactions producing carbon dioxide (CO2) gas in a concrete manner. It is concluded that the integration of experiment methods based on natural materials is effective in stimulating scientific curiosity and children's cognitive development, while offering an interactive science learning alternative outside the formal school environment.
Co-Authors Bwefar, Marsia Isa Jukwati Lusia Narsia Amsad Nurohman, Rahmat Pasaribu, Arta Indah Rahail, Yohannes Sawaki, Celine D Sepriyanto Jenmau, Irja Suaka, Irwandi Yogo