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All Journal Imajiner: Jurnal Matematika dan Pendidikan Matematika Best Journal (Biology Education, Sains and Technology) Continuous Education : Journal of Science and Research
Tarigan, Lola Zeramenda Br
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Education Immunology & microbiology Languange, Linguistic, Communication & Media Mathematics Public Health Other

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Pemodelan Matematika Tipe S1S2E1E2I1I2T Pada Diabetes Melitus Tipe 2 Dengan Mempertimbangkan Treatment Yang Diakibatkan Adanya Pengaruh Obesitas Saragih, Sisca Sri Dewi; Tarigan, Lola Zeramenda Br; Ahkrizal, Afdhal; Hasibuan, Hokkop Efendi
Imajiner: Jurnal Matematika dan Pendidikan Matematika Vol 7, No 4 (2025): Imajiner: Jurnal Matematika dan Pendidikan Matematika
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/imajiner.v7i4.23552

Abstract

Diabetes Mellitus Type 2 is one of the largest contributors to the world of health in non-communicable diseases in Indonesia. Many people are affected either because of genetic obesity or obesity due to food. Mathematical modeling is one way to visualize the development and spread of Type 2 diabetes mellitus. The model used in this study is S1S2E1E2I1I2T and its stability will be seen. The article discusses the stability of fixed points using the Jacobian matrix and the Routh-Hurwitz criteria as well as the Castilo-Chaves and Song Theorem, reproduction numbers, and their numerical analysis.
Comparative Evaluation of Cytokinin-Induced In Vitro Shoot Multiplication in Black Ginger (Kaempferia paviflora Wall. ex Baker) Tambunan, Muhammad Iqbal H.; Tarigan, Lola Zeramenda Br; Saragih, Sisca Sri Dewi; Ritonga, Hayati Sakinah
BEST Journal (Biology Education, Sains and Technology) Vol 8, No 2 (2025): September 2025
Publisher : Program Studi Pendidikan Biologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/best.v8i2.11806

Abstract

Kaempferia parviflora Wall. ex Baker (Zingiberaceae), commonly known as black ginger, produces dark purple to black rhizomes rich in bioactive compounds. Conventional propagation of K. parviflora is constrained by limited planting material availability. This study evaluated the effectiveness of various cytokinins for in vitro shoot multiplication of K. parviflora. Nodal explants derived from sterile in vitro stock were cultured on Murashige & Skoog medium supplemented with one of seven treatments: P₀ (no cytokinin), P₁ (1 mg L⁻¹ BAP), P₂ (2 mg L⁻¹ BAP), P₃ (1 mg L⁻¹ kinetin), P₄ (2 mg L⁻¹ kinetin), P₅ (1 mg L⁻¹ TDZ), or P₆ (2 mg L⁻¹ TDZ), with ten replicates per treatment. Parameters recorded after eight weeks included explant survival percentage, shoot number, leaf number, and shoot length. Explant survival averaged 94 % across treatments. Treatment P₆ (2 mg L⁻¹ TDZ) yielded the highest mean shoot number (4.9 ± 2.6 shoots) and leaf number (9.3 ± 2.2 leaves) per explant. The superior performance of low‑concentration TDZ compared to BAP and kinetin shows its high efficacy in promoting cytokinin‑mediated shoot proliferation.
Development of an Experiential Learning Model for Exploring the Natural Surroundings (EJAS) by Utilizing Forests as a Learning Resource at the Leuser Nature School Tarigan, Lola Zeramenda Br; Tambunan, Muhammad Iqbal Haitame; Sularno, Sularno
Continuous Education: Journal of Science and Research Vol. 6 No. 3 (2025)
Publisher : Pusdikra Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51178/ce.v6i3.2811

Abstract

The research objectives are: (1) To produce a learning model product for exploring the surrounding natural environment using the forest as a learning resource for students at Leuser Nature School. (2) To find out the practicality level of the EJAS learning model by utilizing the Forest as a learning resource (3) The effectiveness of the E JAS model by utilizing the Forest as a learning resource on improving learning outcomes and environmentally conscious behavior. Research and development Borg and Gall is a study used in developing the EJAS learning model by utilizing the Forest as a learning resource for Leuser Nature School students. Expert validation of the EJAS learning model shows an average value of 91.7% with a very valid category. The results of the trials in all three stages are in the very practical category with an average value of 92.3%. Learning outcomes appear significant with an average learning completion score of 60.92 and an average N-Gain value of 0.609 (moderate to quite high category). Students' environmental behavior has an average of 4.15. So the EJAS model can be an alternative learning strategy that is not only effective in improving cognitive learning outcomes, but also in forming attitudes and character values of Leuser Nature School students.
Co-Authors Ahkrizal, Afdhal Hasibuan, Hokkop Efendi Ritonga, Hayati Sakinah Saragih, Sisca Sri Dewi Sularno Sularno, Sularno Tambunan, Muhammad Iqbal H. Tambunan, Muhammad Iqbal Haitame