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All Journal INKUIRI : Jurnal Pendidikan IPA Hydrogen: Jurnal Kependidikan Kimia CHEDS: Journal of Chemistry, Education, and Science
Husna, Ariza Rafidah
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Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemistry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Environmental Science Materials Science & Nanotechnology Physics Other

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PENENTUAN KANDUNGAN TOTAL FENOLAT DAN FLAVANOID SEBAGAI ANTIOKSIDAN DAN ANTIBAKTERI EKSTRAK METANOL DAUN SUNGKAI (PERONEMA CANESCENS JACK) Pratia, Intan Eti; Wahyuni, Laras Resti; Carunisa, Chofifah; Nurfitriani, Ditalia; Husna, Ariza Rafidah; Puspita Devi, Shella Febriandika; Erika, Farah
CHEDS: Journal of Chemistry, Education, and Science Vol 8, No 1 (2024)
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/cheds.v8i1.9028

Abstract

Kalimantan merupakan pulau yang terkenal dengan keanekaragaman hayatinya. Daun sungkai merupakan salah satu kekayaan hayati yang terdapat di Pulau Kalimantan. Daun sungkai kaya akan potensi aktivitas antioksidan dan antibakteri. Hal ini disebabkan tingginya kandungan senyawa fenolik dan flavonoid pada daun sungkai. Penelitian ini bertujuan untuk mengetahui kadar total fenolik dan flavonoid pada ekstrak daun sungkai. Sampel diekstraksi dengan metode maserasi menggunakan pelarut metanol. Penentuan kandungan total fenolik ekstrak menggunakan alat pembanding asam galat dengan berbagai konsentrasi. Penentuan kadar flavonoid total dilakukan dengan menggunakan komparator kuarsetin. Nilai serapan diukur menggunakan spektrofotometer UV-Vis. Kemudian nilai serapannya dimasukkan ke dalam persamaan regresi linier. Hasil penelitian menunjukkan kandungan total fenolik pada ekstrak daun sungkai sebesar 5,461 mg/L dan kandungan total flavonoid sebesar 17,359 mg/L.
Effectiveness of Toulmin’s Argumentation Pattern (TAP) with Snowball Media on Student Learning Outcomes in Acid-Base Husna, Ariza Rafidah; Watulingas, Maasje Chaterine; Rahmadani, Agung
Hydrogen: Jurnal Kependidikan Kimia Vol. 13 No. 6 (2025): December 2025
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v13i6.18071

Abstract

The enhancement of classroom learning achievements can be attained through the implementation of instructional approaches that are both efficient and aligned with students  specific requirements. This study focuses to evaluate how effectively the integration of the Toulmin’s Argumentation Pattern (TAP) framework with snowball-based media on students achievement in acid-base material. The novelty of this study lies in the direct integration of snowball media within the TAP argumentative framework. Previous research has applied TAP or snowball separately, but no studies have combined both approaches into a single structured model, particularly for acid-base material. This integration introduces a new instructional innovation that merges systematic reasoning with interactive peer engagement. The TAP learning model will encourage students to develop structured reasoning and critical thinking, while snowball media is used to increase interaction between students through fun and collaborative question and answer activities. Pre-experimental research used a one group pretest-posttest design involving 36 students of class XI-D SMAN 7 Samarinda selected through purposive sampling based  on class activity and schedule suitability. Data analysis included normality test, N-Gain, and effect size calculation. The average learning outcomes increased from 7.22 in the pretest to 69.16 in the posttest. The average N-Gain value is 0.67 indicate moderate improvement, while the Effect Size value is 4.91 showed a very high impact. These results confirm that TAP learning design combined with snowball media is highly effective in improving student learning outcomes on acid-base materials.
Literature Review Penerapan Pembelajaran Sains Berbasis Lingkungan untuk Meningkatkan Sikap Peduli Lingkungan Siswa Arisma, Ninda; Septiani, Risky; Husna, Ariza Rafidah; Rifa'i, Ahmad; Erika, Farah
INKUIRI: Jurnal Pendidikan IPA Vol 13, No 1 (2024): INKUIRI: Jurnal Pendidikan IPA
Publisher : Magister Pendidikan Sains Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/inkuiri.v13i1.81474

Abstract

Permasalahan lingkungan menjadi salah satu permasalahan krusial di seluruh dunia. Bumi yang semakin tua telah banyak mengalami kerusakan. Diperlukan adanya kesadaran sejak dini bagi generasi muda yang akan merasakan kondisi lingkungan di masa mendatang. Studi literatur ini bertujuan untuk mengetahui penerapan pembelajaran sains berbasis lingkungan yang dapat meningkatkan sikap peduli lingkungan siswa. Metode yang digunakan dalam penelitian ini adalah narrative literature review, dengan menganalisis beberapa sumber pustaka mengenai pembelajaran sains berbasis lingkungan. Penerapan pembelajaran sains berbasis lingkungan telah dilakukan pada tingkat sekolah dasar hingga sekolah menengah atas dengan berbagai mata pelajaran di bidang sains. Hasil studi literatur ini menunjukkan bahwa pembelajaran sains berbasis lingkungan mampu meningkatkan sikap peduli lingkungan serta beberapa aspek pengetahuan dan keterampilan sains pada siswa.Environmental problems are one of the crucial problems throughout the world. The aging Earth has experienced a lot of damage. There is a need for early awareness for the younger generation who will experience environmental conditions in the future. This literature study aims to determine the application of environmentally based science learning which can increase students' environmental care attitudes. The method used in this research is a narrative literature review, by analyzing several library sources regarding environmental-based science learning. The application of environmentally based science learning has been carried out at elementary to high school levels with various subjects in the field of science. The results of this literature study show that environmentally based science learning is able to increase environmental care attitudes as well as several aspects of science knowledge and skills in students.
Co-Authors Arisma, Ninda Carunisa, Chofifah Farah Erika Nurfitriani, Ditalia Pratia, Intan Eti Puspita Devi, Shella Febriandika Rahmadani, Agung Rifa'i, Ahmad Septiani, Risky Wahyuni, Laras Resti Watulingas, Maasje Chaterine