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All Journal Jurnal Pendidikan Kimia Indonesia Jurnal Pengelolaan Laboratorium Pendidikan Jurnal Inovasi Pendidikan Kimia
I Gusti Ayu Nyoman Sri Wahyuni
Universitas Pendidikan Ganesha
Chemistry Education

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Efektivitas Video Panduan Menggunakan Bahan Kimia untuk Meningkatkan Kesehatan dan Keselamatan Kerja di Laboratorium I Dewa Putu Subamia; I Gusti Ayu Nyoman Sri Wahyuni; Ni Nyoman Widiasih
Jurnal Pendidikan Kimia Indonesia Vol. 5 No. 1 (2021)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jpk.v5i1.29535

Abstract

Masih adanya kecelakaan dalam menggunakan bahan kimia yang berpotensi mengancam kesehatan dan keselamatan praktikan, menunjukkan bahwa pengetahuan kesehatan dan keselamatan kerja di laboratorium kimia masih perlu ditingkatkan. Penelitian ini bertujuan untuk menganalisis efektivitas video panduan menggunakan bahan kimia untuk meningkatkan pengetahuan kesehatan dan keselamatan kerja. Desain penelitian adalah pre-experimental dengan model one-group pretest-posttest design. Populasi dalam penelitian ini adalah mahasiswa semester 5. Pengambilan sampel dilakukan dengan teknik simple random sampling melalui google form. Jumlah sampel 31 orang dipilih secara acak dari keseluruhan mahasiswa yang mengisi form pre tes dan post tes. Metode pengumpulan data adalah tes dan angket. Analisis data menggunakan uji paired sample t test, dan uji persentase efektivitas. Hasil penelitian menunjukkan nilai rata-rata posttest lebih besar dari nilai rata-rata pretest, mengalami peningkatan yang signifikan. Hasil uji persentase efektivitas 81,50% terkategori efektif. Berdasarkan hasil penelitian tersebut, dapat disimpulkan bahwa pemberian video panduan menggunakan bahan kimia efektif meningkatkan pengetahuan kesehatan dan keselamatan kerja menggunakan bahan kimia.
Optimasi Kinerja Alat Fourier Transform Infrared (FTIR) Melaui Studi Perbandingan Komposisi dan Ketebalan Sampel-KBr I Dewa Putu Subamia; Ni Nyoman Widiasih; I Gusti Ayu Nyoman Sri Wahyuni; Putu Lilik Pratami Kristiyanti
Jurnal Pengelolaan Laboratorium Pendidikan Vol.5, No.2, Juli 2023
Publisher : UPT Laboratorium Terpadu, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jplp.5.2.58-69

Abstract

Problems often occur in sample testing using the FTIR instrument, one of which is that the spectrum quality of the measurement results is not optimal. This has implications for the accuracy of the test results. This condition indicates that the performance of the tool is not optimal. The non-optimal quality of this spectrum is thought to be influenced by the composition factor and the thickness of the sample-KBr which is measured not in accordance with the legibility limits of the instrument. To overcome this problem, it is important to conduct a study to find out the optimum composition and thickness of the KBr-sample which can be measured properly by the instrument. The purpose of this study was to optimize the performance of the FTIR device through a study of the optimum composition and thickness of the KBr-sample so that a good spectrum was produced in the sample measurement using FT-IR type IRAffinity-1 Shimadzu. This research is an experimental research with infrared spectrophotometry method, using the One Shot Case Study design. The treatment is a measurement of the variation in the composition of the sample-KBr and the thickness of the sample. The spectrum resulting from the reading of the FT-IR spectrophotometer is interpreted to include wave number and transmittance percent. The results of the readings of each variation are compared with the standard spectrum to see the optimization of the measurement results so that the best spectrum is obtained. The results showed that the optimum ratio of the sample-KBr composition was 4% and the optimum thickness was 1/2 pan.
Miller’s Pyramid as a Predictor of Undergraduate Students’ Practical Competence in Preventing Chemical Laboratory Accidents I Ketut Lasia; Ni Made Wiratini; I Ketut Budiada; I Gusti Ayu Nyoman Sri Wahyuni
Jurnal Inovasi Pendidikan Kimia Vol. 19 No. 2 (2025): Jurnal Inovasi Pendidikan Kimia
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jipk.v19i2.16490

Abstract

Preventing accidents in chemistry laboratories is a critical concern, as laboratory activities involve chemical hazards, equipment risks, and procedural errors. One of the main contributing factors to laboratory accidents is inadequate student competence during practical activities. However, systematic predictors for assessing practicum competence are still rarely implemented. This study aims to examine the effectiveness of Miller’s Pyramid as a predictor of students’ practicum competence in preventing work-related accidents in chemistry laboratories. The research employed a descriptive evaluative design. The participants consisted of students from the Chemistry Department who were involved in laboratory practicums. The object of the study was students’ practicum competence based on the four levels of Miller’s Pyramid: knows, knows how, shows, and does. Data were collected through written tests, interviews, and direct observations using structured assessment rubrics. The collected data were analyzed descriptively and presented in percentage form. Student competence was categorized as good when at least 70% of the indicators at each Miller’s Pyramid level were achieved. The results showed that students’ competence at all levels of Miller’s Pyramid met the established criteria, indicating good overall practicum competence. Furthermore, the findings demonstrate that Miller’s Pyramid can effectively function as a predictor of students’ practicum competence related to laboratory safety. In conclusion, the application of Miller’s Pyramid provides a comprehensive framework for assessing and improving student competence, thereby contributing to the prevention of work accidents in chemistry laboratories
Co-Authors I Dewa Putu Subamia I Dewa Putu Subamia I Ketut Budiada I Ketut Lasia Ni Made Wiratini Ni Nyoman Widiasih Putu Lilik Pratami Kristiyanti