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Chemistry Education Study Program, Teacher Training, And Education, Tadulako University
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The Effectiveness of Anti-Mosquito Aromatherapy Candles Formulated with Pine Leaf and Tuberose Flower Essential Oils Elvita, Febby A.; Nuryanti, Siti; Ahmar, Dewi S.; Ijirana, Ijirana; Ningsih, Purnama
Jurnal Akademika Kimia Vol. 14 No. 4 (2025)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2025.v14.i4.pp242-250

Abstract

The essential oil of tuberose flowers has a distinctive aroma that mosquitoes dislike and can kill insects, and it also contains eugenol, a beneficial antioxidant. Therefore, this essential oil is utilised in aromatherapy candles. Another essential oil with a distinctive aroma is pine needle oil. Its aroma can relieve cold symptoms and also repel mosquitoes. The objective of this research is to determine the characteristics and effectiveness of essential oil extracts from pine needles (Pinus merkusii) and tuberose flowers (Polianthes tuberosa L) as anti-mosquito aromatherapy candles. The research method used is true experimental. The samples used in this study are pine leaves and tuberose flowers. Fresh pine leaves are steam-distilled, while tuberose essential oil is commercially produced. Then, an evaluation stage of the aromatherapy candle preparation is conducted. The results of the therapeutic effect test on F1 and F4 show a feeling of relaxation and freshness. The percentage of mosquito mortality in formulations F0, F1, F2, F3, and F4 were 0%, 27%, 37%, 43%, and 53% respectively. From these formulations, it can be concluded that F0, F1, F2, and F3 are not effective at killing mosquitoes, as only F4 meets the lethal concentration 50 (LC50) criteria. This shows that in the F4 formulation, the essential oil content, consisting of eugenol and α-pinene, produces the highest mosquito mortality rate, and this combination has the potential to be used as an anti-mosquito aromatherapy wax.
Analisis Tingkat Literasi Kimia Nominal Siswa pada Materi Asam Basa di Sma Negeri 5 Palu Reski Amelia; Magfirah Magfirah; Ijirana Ijirana; Detris Poba
Journal of Education Research Vol. 7 No. 2 (2026)
Publisher : Perkumpulan Pengelola Jurnal PAUD Indonesia

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Abstract

Penelitian ini bertujuan untuk menganalisis tingkat literasi kimia nominal siswa kelas XII MIPA SMA Negeri 5 Palu pada materi asam–basa. Literasi kimia nominal merupakan kemampuan dasar siswa dalam mengenali istilah, simbol, dan konsep kimia sederhana yang menjadi fondasi bagi pengembangan literasi kimia pada tingkat yang lebih tinggi. Penelitian ini menggunakan pendekatan deskriptif kuantitatif dengan desain survei. Subjek penelitian terdiri atas 271 siswa kelas XII MIPA SMA Negeri 5 Palu tahun ajaran 2025/2026 yang dipilih menggunakan teknik total sampling. Instrumen penelitian berupa tes literasi kimia nominal berbentuk pilihan ganda sebanyak 20 butir soal yang mencakup lima topik, yaitu teori asam–basa, identifikasi asam–basa, pH dan indikator, reaksi kimia asam–basa, serta sifat khusus larutan dan air. Data dianalisis secara deskriptif menggunakan persentase dan kategori tingkat literasi. Hasil penelitian menunjukkan bahwa tingkat literasi kimia nominal siswa masih tergolong rendah, dengan 57,2% siswa berada pada kategori rendah hingga sangat rendah. Topik teori asam–basa memperoleh rata-rata persentase terendah sebesar 39,03% dengan kategori sangat rendah, sedangkan topik sifat khusus larutan dan air memperoleh hasil tertinggi sebesar 59,07% dengan kategori rendah. Hasil penelitian menunjukkan bahwa siswa masih mengalami kesulitan dalam memahami konsep dasar asam–basa secara konseptual dan cenderung mengandalkan hafalan. Oleh karena itu, diperlukan pembelajaran yang lebih kontekstual dan berbasis literasi untuk meningkatkan pemahaman konsep kimia siswa.
Influence Problem-Based Learning Model (PBL) on Student Learning Outcomes on Colloidal Systems Material Nurjanna Nurjanna; Sri M. Sabang; Ijirana Ijirana; Ratman Ratman
Jurnal Akademika Kimia Vol. 15 No. 1 (2026)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2026.v15.i1.pp46-54

Abstract

Students' chemistry learning outcomes remain relatively low, especially in the colloidal system material, which is considered difficult to understand due to a lack of active student involvement in the learning process. The Problem-Based Learning (PBL) model is an innovative approach that can improve student learning outcomes by presenting real problems that encourage students to think critically, analytically, and actively in finding solutions. This study aims to examine the effect of the PBL model on student learning outcomes in the colloidal system material for class XI at SMA Negeri 1 Palu. The type of research used is a quasi-experiment with a Nonequivalent Control Group Design. The research sample consisted of two classes: class XI-3, the control class, and XI-4, the experimental class, each with 36 students. The research instrument was a multiple-choice learning-outcome test consisting of 15 questions, validated by an expert and found to have 82% validity. Pretest and posttest data were analyzed using the SPSS program version 26.0. The t-test results showed a p-value of 0.043 < 0.05, so H0 was rejected, and H1 was accepted. Thus, it can be concluded that the application of the Problem-Based Learning (PBL) model significantly improves student learning outcomes in colloidal systems. This study provides empirical evidence that the application of PBL can increase active involvement and student learning outcomes, and can serve as a reference for teachers in developing more contextual and student-centered chemistry learning strategies.
Co-Authors AA Sudharmawan, AA Ahmar, Dewi S. Almubarak Almubarak Anastasya, Anastasya Anna Kurnia Aprilina Rizqi Auliya AR, Rommy Atiek Winarti Baharuddin Paloloang Damayanti, Alfina Detris Poba Detris Poba Elvita, Febby A. Elyas Djufri Esterlina Marpaung, Meida Ficiyarni Gleryl F. Novemly Haeruddin Haeruddin Hariani Hariani Hartarti Uminah Hendri Hermawan Adinugraha Hengki Abram, Paulus Hermin Ika Kartika Indra, Pande Irna Cahyani Jamaludin M Sakung Jusman Mansyur Kasmudin Mustapa Lilin Nurjanah Magfirah Magfirah Magfirah Magfirah, Magfirah Mailili, Wahyuni Mappiratu Mappiratu Mery Napitupulu Minarni Rama Jura Misnah Misnah Muh. Rizal Nur Intan Nurbaya Nurbaya, Nurbaya Nurfauzia Nurfauzia Nurjanna Nurjanna Nurvita Pajri, Nur Parham Saadi Paul Rumondor Prasetio, Budi Purnama Ningsih Rahayu, Melani Ramadhan , Moh. R. Ratman Ratman Ratman Ratman Ratman Ratman Reni Septiani Reski Amelia Rizall, Muhammad S. Supriadi, S. Sarintan Nurcahyati Kaharu Siti Aminah Siti Nuryanti Sitti Aminah Sitti Aminah Sitti Rahmawati Sri M. Sabang Sri Muliani Sri Mulyani Sri Mulyani Sabang Sri Poedjiastoeti Sri Wahyuni Sri Wahyuni Suherman Suherman Suherman Suherman Supriadi Supriadi Supriadi Supriadi Suyono - Syamsuriwal, Syamsuriwal Tri Santoso Tri Santoso Vivien Marvina Windia Hadi, Windia