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Pengaruh Model Pembelajaran POE (Predict-Observe-Explain) terhadap Keterampilan Proses Sains Siswa Kelas XI pada Materi Larutan Penyangga Aulia, Faizah; Paristiowati, Maria; Nanda, Elsa Vera
Jurnal Riset Pendidikan Kimia (JRPK) Vol. 15 No. 2 (2025): Jurnal Riset Pendidikan Kimia (JRPK), Volume 15 Nomor 2 (2025)
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JRPK.152.07

Abstract

The implementation of chemistry learning in schools is not yet optimal because it tends to only prioritize products, namely students' cognitive learning outcomes, while students' science process skills are put aside. Therefore, this research aims to determine the effect of the POE (Predict-Observe-Explain) learning model on class XI students' science process skills in buffer solution material. The participants in this research were 86 class XI students at SMA Negeri 1 South Tangerang in the even semester of the 2023/2024 academic year. The research method used was quasi-experimental with a Pretest Posttest Nonequivalent Control Group Design research design. This research sample was taken using a purposive sampling technique so that class XI MIPA 4 was obtained as a control class which applied the 5M learning model and class Quantitative data were analyzed using SPSS 29 with the Mann Whitney U test and Wilcoxon test. The results show that the science process skills of experimental class students are greater than those of control class students. Therefore, it can be concluded that the application of the POE (Predict-Observe-Explain) learning model has a positive effect on class XI students' science process skills in buffer solution material.
OPTIMIZATION GEL OF ESSENTIAL OIL OF LEMONGRASS (Cymbopogon nardus) AS A REPELLANT AND ACTIVITY AGAINST Aedes aegypti Ramadhiani, Aninditha Rachmah; Pratiwi, Galih; Oktarina, Tri; Aulia, Faizah; Shiyan, Shaum
Jurnal Kesehatan Farmasi Vol 7 No 2 (2025): Jurnal Kesehatan Farmasi
Publisher : Jurusan Farmasi, Poltekkes Kemenkes Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36086/jkpharm.v7i2.2824

Abstract

Latar Belakang: demam berdarah salah satu jenis penyakit yang menular yang diakibatkan gigitan nyamuk pembawa virus dengue. Salah satu tanamaan mempunyai sifat repelan ialah minyak atsiri sereh yang mempunyai kandungan yaitu sitronelal, sitrnelol, dan geraniol. Karbopol merupakan sifat fisik sebagai pengental dan gliserin sebagai humektan. Tujuan: penelitian ini untuk mengoptimalkan gel repelan minyak atsiri sereh metode SLD, mengetahui stabilitas sifat fisik gel, dan uji aktivitas terhadap nyamuk aedes aegypti dan meliputi waktu proteksi. Metode: penelitian ini dilakukan secara eksperimental laboratorium dengan menggunakan pendekatan simplex lattice design. Menggunakan bantuan piranti lunak design expert. Parameter diuji, meliputi uji viskositas, uji daya sebar dan uji viskositas. Stabilitas fisik menggunakan metode T-test. Uji daya tolak nyamuk menggunakan SPSS diuji menggunakan metode kruskall wallis. Kesimpulan: perbandingan konsentrasi karbopol 1.007% dan gliserin 18,993% dan daya tolak pada nyamuk aedes aegypti 98,25% menghasilkan gel minyak atsiri sereh (cymbopogon nardus) dengan sifat gel yang optimum. Uji stabilitas menunjukkan tidak adanya perubahan yang signifikan pada uji organoleptis, gel minyak atsiri variasi konsentrasi carbopol dan gliserin terbukti mempunyai daya tolak nyamuk aedes aegypti sebesar 98,25%.