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Tlali, Moeketsi Freddie
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Chemistry Education Social Sciences Other

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Journal : Journal of Chemical Learning Innovation

 1 
Mind Mapping Meets Classical Music: An Effective Strategy to Improve Chemistry Learning Achievement in Hydrocarbon Topic Sofyan, Asep; Tlali, Moeketsi Freddie
Journal of Chemical Learning Innovation Vol. 1 No. 2 (2024): December
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jocli.v1i2.1141

Abstract

Purpose of the study: The purpose of this study is to evaluate the influence of using mind mapping learning accompanied by classical music on chemistry learning outcomes in the topic of hydrocarbon compounds among Class X students at State Senior High School 1 Tapung, Kampar. Methodology: This research uses an experimental method with a t-test design, where Class X-3 serves as the control group following conventional learning (teacher-centered), and Class X-5 serves as the experimental group using mind mapping learning accompanied by classical music. The data collection instruments consist of pre-test and post-test questions. Main Findings: The results of the descriptive analysis show that the experimental class, which used mind mapping accompanied by classical music, achieved higher learning outcomes compared to the control class that followed conventional learning methods. The results of the inferential analysis, using homogeneity and normality tests, indicate that the study hypothesis is accepted, showing a significant difference in student learning outcomes between the two groups. The t-test results reveal that tcount > ttable (3.43 > 1.61), with an effect size of 14%. The use of mind mapping learning accompanied by classical music significantly improves student learning outcomes on the topic of hydrocarbon compounds compared to conventional learning methods. Novelty/Originality of this study: This study provides a new contribution by proving that the use of mind mapping learning models combined with classical music can significantly improve student learning outcomes on hydrocarbon compound material compared to conventional learning.
Phytochemical Investigation of Mastigophora diclados: Isolation of a Herbertene-Type Sesquiterpenoid Ardiansyah, Ferry Indar; Tlali, Moeketsi Freddie
Journal of Chemical Learning Innovation Vol. 2 No. 2 (2025): December
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jocli.v2i2.2963

Abstract

Purpose of the study: This study aims to isolate and characterize secondary metabolite compounds from the ethyl acetate extract of the liverwort Mastigophora diclados collected in Indonesia using chromatographic separation and spectroscopic analysis. Methodology: This study employed an experimental laboratory design using maceration extraction with n-hexane and ethyl acetate. Isolation was conducted using column chromatography and thin-layer chromatography (silica gel 60 GF254). Instruments included rotary evaporator (Eyela N-1000), water bath (Eyela SB-1000), and ¹H-NMR spectrometer (JEOL 500 MHz). Data were analyzed through spectral comparison and phytochemical screening methods. Main Findings: The ethyl acetate extract yielded 41.78 g (1.98%). Phytochemical screening indicated the presence of terpenoids. Two pure compounds were obtained (III-B: 8 mg; IV-B: 4 mg) with Rf 0.44. Compound III-B showed a melting point of 152–154 °C. ¹H-NMR analysis revealed characteristic signals of four methyl groups and olefinic protons, indicating a herbertene-type sesquiterpenoid structure. Novelty/Originality of this study: This study is the first to report the isolation and structural characterization of secondary metabolites from Indonesian Mastigophora diclados. It reveals a herbertene-like compound with slight spectral variations, suggesting a potential new derivative influenced by geographical factors, thereby contributing to bryophyte chemotaxonomy and expanding natural product research in tropical regions.
Phytochemical Investigation of Mastigophora diclados: Isolation of a Herbertene-Type Sesquiterpenoid Ardiansyah, Ferry Indar; Tlali, Moeketsi Freddie
Journal of Chemical Learning Innovation Vol. 2 No. 2 (2025): December
Publisher : Cahaya Ilmu Cendekia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37251/jocli.v2i2.2963

Abstract

Purpose of the study: This study aims to isolate and characterize secondary metabolite compounds from the ethyl acetate extract of the liverwort Mastigophora diclados collected in Indonesia using chromatographic separation and spectroscopic analysis. Methodology: This study employed an experimental laboratory design using maceration extraction with n-hexane and ethyl acetate. Isolation was conducted using column chromatography and thin-layer chromatography (silica gel 60 GF254). Instruments included rotary evaporator (Eyela N-1000), water bath (Eyela SB-1000), and ¹H-NMR spectrometer (JEOL 500 MHz). Data were analyzed through spectral comparison and phytochemical screening methods. Main Findings: The ethyl acetate extract yielded 41.78 g (1.98%). Phytochemical screening indicated the presence of terpenoids. Two pure compounds were obtained (III-B: 8 mg; IV-B: 4 mg) with Rf 0.44. Compound III-B showed a melting point of 152–154 °C. ¹H-NMR analysis revealed characteristic signals of four methyl groups and olefinic protons, indicating a herbertene-type sesquiterpenoid structure. Novelty/Originality of this study: This study is the first to report the isolation and structural characterization of secondary metabolites from Indonesian Mastigophora diclados. It reveals a herbertene-like compound with slight spectral variations, suggesting a potential new derivative influenced by geographical factors, thereby contributing to bryophyte chemotaxonomy and expanding natural product research in tropical regions.
Co-Authors Ardiansyah, Ferry Indar Sofyan, Asep