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All Journal Caraka Tani: Journal of Sustainable Agriculture Jurnal Simki Postgraduate
Mukholifah, Umi
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Agriculture, Biological Sciences & Forestry Education Languange, Linguistic, Communication & Media Mathematics Other

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Implementasi Model Pembelajaran Problem-Based Learning dengan Bantuan Percobaan Rangkaian Listrik terhadap Peningkatan Hasil Belajar Siswa Kelas V SD Putri, Rossa Puspa Maharani; Mukholifah, Umi; Katminingsih, Yuni; Mubarokah, Nurul
Jurnal Simki Postgraduate Vol 3 No 4 (2024): Volume 3 Nomor 4 Tahun 2024
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/jspg.v3i4.946

Abstract

This study aims to improve students' learning outcomes in the subject of Social and Natural Sciences on the topic of electrical energy and its applications through the implementation of a problem-based learning model supported by circuit experiments. The research was conducted in the fifth grade of SD Negeri Sukorame 2, Kota Kediri, involving 26 students, consisting of 16 boys and 10 girls. The research method used is classroom action research carried out in two cycles. Each cycle consisted of planning, implementation, observation, and reflection stages. Data were collected through observations and evaluation tests comprising five essay questions administered at the end of each cycle. The results of the study showed an improvement in students' learning outcomes from the first cycle to the second cycle. In the first cycle, the average learning score was 70, with a classical completeness rate of 42.31%. Following the implementation of the problem-based learning model with experimental support, the average learning score in the second cycle increased to 88.5%, with a classical completeness rate of 88.5%, exceeding the predetermined standard. This study demonstrates that problem-based learning accompanied by experiments is effective in enhancing students' understanding of the material, critical thinking skills, and independent learning.
Implementasi Model Pembelajaran Problem-Based Learning dengan Bantuan Percobaan Rangkaian Listrik terhadap Peningkatan Hasil Belajar Siswa Kelas V SD Putri, Rossa Puspa Maharani; Mukholifah, Umi; Katminingsih, Yuni; Mubarokah, Nurul
Jurnal Simki Postgraduate Vol 3 No 4 (2024): Volume 3 Nomor 4 Tahun 2024
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/jspg.v3i4.946

Abstract

This study aims to improve students' learning outcomes in the subject of Social and Natural Sciences on the topic of electrical energy and its applications through the implementation of a problem-based learning model supported by circuit experiments. The research was conducted in the fifth grade of SD Negeri Sukorame 2, Kota Kediri, involving 26 students, consisting of 16 boys and 10 girls. The research method used is classroom action research carried out in two cycles. Each cycle consisted of planning, implementation, observation, and reflection stages. Data were collected through observations and evaluation tests comprising five essay questions administered at the end of each cycle. The results of the study showed an improvement in students' learning outcomes from the first cycle to the second cycle. In the first cycle, the average learning score was 70, with a classical completeness rate of 42.31%. Following the implementation of the problem-based learning model with experimental support, the average learning score in the second cycle increased to 88.5%, with a classical completeness rate of 88.5%, exceeding the predetermined standard. This study demonstrates that problem-based learning accompanied by experiments is effective in enhancing students' understanding of the material, critical thinking skills, and independent learning.
Effects of Combined 2,4-D and BAP Treatments on the Formation of Leaf-Derived Callus in Pogostemon cablin (Blanco) Benth. Puspaningtyas, Ira; Mukholifah, Umi; Fania, Maitsa Adzro; Pratiwi, Desita Amalia; Asmara, Reva Firstasa; Alfatikhatunnisa, Maulida; Jadid, Nurul
Caraka Tani: Journal of Sustainable Agriculture Vol 40, No 2 (2025): April
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/carakatani.v40i2.97331

Abstract

Pogostemon cablin (Blanco) Benth., a key source of patchouli oil (2.5 to 5% content), is widely used in the perfume and cosmetic industries but faces propagation challenges due to its time-consuming nature and susceptibility to pathogens. To overcome these limitations, in vitro techniques have been adopted to produce healthy and uniform seedlings efficiently. This study evaluated the effects of varying concentrations of 2,4-D (0 to 1.5 mg l-1) and BAP (0 to 1.5 mg l-1) on the in vitro induction of patchouli calli using axenic leaf explants cultured on Murashige and Skoog (MS) medium for 60 days. Growth parameters assessed included callus emergence time, morphological traits (texture and color), callogenesis percentage, organogenesis, and fresh callus weight. The results indicated that the combination of 2,4-D and BAP significantly influenced callogenesis, organogenesis, and callus morphology. The optimal combination (A0B3: 2,4-D 0 mg l-1 + BAP 1.5 mg l-1) achieved 100% callogenesis and organogenesis, with an average callus fresh weight of 0.25 g and an initiation time of 40.5 days. Calli exhibited a crumbly texture with a yellowish-white color, highlighting the role of auxin and cytokinin interactions in patchouli callus induction. These findings provide a foundation for scaling up in vitro patchouli oil production.
Co-Authors Alfatikhatunnisa, Maulida Asmara, Reva Firstasa Fania, Maitsa Adzro Mubarokah, Nurul Nurul Jadid Pratiwi, Desita Amalia Puspaningtyas, Ira Putri, Rossa Puspa Maharani Yuni Katminingsih