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Ijirana
Chemistry Education Study Program, Teacher Training, And Education, Tadulako University
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The Effect of the PBL Model on Literacy and Numeracy Skills in Acid-Base Material Ratman Ratman; Kasmudin Mustapa; Dewi S. Ahmar; Anastasya Anastasya; Ijirana Ijirana; Magfirah Magfirah; Haeruddin Haeruddin
Jurnal Akademika Kimia Vol. 14 No. 3 (2025)
Publisher : Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22487/j24775185.2025.v14.i3.pp169-173

Abstract

Problem-Based Learning is a learning model that focuses primarily on problems in the learning process. It encourages students to collaborate in groups to solve problems through various activities. The purpose of this study was to determine the effect of the Problem-Based Learning (PBL) model on students' numeracy literacy skills in acid-base material. This study used a quantitative, true-experimental design. The research population consisted of 47 students. The research sample was obtained using purposive sampling, divided into an experimental class of 15 students from class XI MIA 2 and a control class of 16 students from class XI MIA 1. The research instruments included a literacy test comprising 20 multiple-choice questions and a numeracy test comprising five essay questions. Experts validated all instruments provided. Data analysis used the Mann-Whitney test. The results of the data analysis showed that the Mann-Whitney test p-value (0.000) was lower than the predetermined significance level of 0.05. Therefore, it can be concluded that the PBL learning model affects students' numeracy literacy skills.
The Effectiveness of Anti-Mosquito Aromatherapy Candles Formulated with Pine Leaf and Tuberose Flower Essential Oils Febby A. Elvita; Siti Nuryanti; Dewi S. Ahmar; Ijirana Ijirana; Purnama Ningsih
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 00.00%, 27.00%, 37.00%, 43.00%, and 53.00% 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.
Patterns of Metacognitive Skills and External Representation of Students in Chemistry Problem Solving Ijirana Ijirana; Jusman Mansyur
Jurnal Ilmu Pendidikan Vol. 25 No. 2 (2019)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um048v25i22019p58-65

Abstract

This research aims to examine the pattern of external representation and metacognitive skills in chemistry problem solving for students of chemistry education at Tadulako University. This picture will enrich the treasures of thinking skills in the field of science, namely how students/prospective teachers think in the context of metacognitive skills and how these students display an external representation system on chemistry concepts. The subject of this qualitative study was obtained through a purposive random sampling of 97 students who have been programmed Basic Chemistry course 2017/2018 academic year. Subjects were selected based on the results of the screening using a metacognitive skills assessment questionnaire (MCAI). Two problems solved by the subject by setting one-on-one thinking aloud. Subjects who complete the issue by setting further interviews at different times. The problem-solving activity was recorded using a video camera. The subject uses a type of representation and aspects of metacognitive skills and how to use the sequence of activities, analyzed in detail. The results showed that students of chemical education used metacognitive skills and external representations. So students solve chemical problems. Students also can improve knowledge retention related to linking new knowledge with previous knowledge, creating ideas, organizing, and even synthesizing knowledge. Students become productive and find solutions for problem-solving well
Co-Authors AA Sudharmawan, AA Almubarak Almubarak Anastasya Anastasya Anna Kurnia Aprilina Rizqi Auliya AR, Rommy Atiek Winarti Baharuddin Paloloang Damayanti, Alfina Detris Poba Detris Poba Dewi S. Ahmar Elyas Djufri Esterlina Marpaung, Meida Febby A. Elvita 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 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 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