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All Journal Jurnal Pendidikan Matematika dan IPA Jurnal Penelitian Sains JIFP (Jurnal Ilmu Fisika dan Pembelajarannya)
Cahyati, Nilam
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Agriculture, Biological Sciences & Forestry Chemistry Education Mathematics Physics

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Review: Potensi Hidrogel Selulosa sebagai Media Enkapsulasi Senyawa Bioaktif Rodhiyah, Marathur; Naufal, Muhammad Risyad; Cahyati, Nilam; Nur'aini, Siti; Arandi, Tyas Al
Jurnal Penelitian Sains Vol 27, No 3 (2025)
Publisher : Faculty of Mathtmatics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56064/jps.v27i3.1289

Abstract

Hidrogel merupakan polimer struktur tiga dimensi yang memiliki kemampuan menyerap cairan. Hidrogel dapat dibuat menggunakan polimer sintetis seperti selulosa. Penggunaan selulosa tersebut didasarkan pada kelimpahan kandungannya pada berbagai tanaman yang ada di Indonesia. Proses pembuatan hidrogel dilakukan dengan menggunakan ikat silang fisika. Hidrogel yang dihasilkan menunjukkan karakteristik yang baik, meliputi nilai derajat pengembangan, kekuatan mekanik, dan biokompatibilitas. Namun, kekurangannya adalah hidrogel belum bisa dimanfaatkan secara optimal dalam bidang biomedis karena kurangnya aktivitas antibakteri yang memadai. Salah satu aplikasi biomedis yang menjadi perhatian adalah aplikasi penutup luka. Hal tersebut berkaitan dengan banyaknya kasus infeksi luka yang terjadi. Sehingga jika ingin digunakan sebagai aplikasi penutup luka, maka pada matrik hidrogel perlu ditambahkan senyawa bioaktif dari bahan alam. Ekstrak bahan alam yang digunakan harus memiliki kandungan senyawa bioaktif yang memiliki aktivitas antibakteri, antioksidan, dan anti inflamasi. Paper review ini menganalisis beberapa kandidat sumber senyawa bioaktif. Ekstrak biji mangga dapat dijadikan sebagai kandidat karena memiliki sifat-sifat tersebut. Selain itu pemilihan ekstrak biji mangga juga didasarkan pada keberlimpahannya di Indonesia. Sehingga dapat membantu mengatasi permasalahan pengolahan limbah menjadi material baru yang lebih bermanfaat.
IMPROVING CONCEPTUAL UNDERSTANDING IN QUANTUM PHYSICS THROUGH THE IMPLEMENTATION OF A DIGITAL VISUALIZATION-BASED ARCS-V Cahyati, Nilam; Supardi; Andriani, Nely; Akhsan, Hamdi; Markos Siahaan, Sardianto
Jurnal Ilmu Fisika dan Pembelajarannya (JIFP) Vol 9 No 2 (2025): Jurnal Ilmu Fisika dan Pembelajarannya (JIFP)
Publisher : Program Studi Pendidikan Fisika, UIN Raden Fatah Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19109/9r55r562

Abstract

Quantum Physics is a compulsory course for Physics students that requires both mathematical and conceptual understanding. A survey of 41 Physics Education students at Sriwijaya University revealed that 85.7% experienced difficulties in learning Quantum Physics. Specifically, 79.5% struggled with formula derivations, 63.6% with problem-solving, and 47.7% with the language used. The Schrödinger equation is one of the most difficult topics as it involves the relationship between wave functions, energy, and probability. This study aimed to develop digital teaching materials based on the ARCS-V (Attention, Relevance, Confidence, Satisfaction, and Volition) motivational approach to support students’ understanding of Quantum Physics concepts. The Rowntree development model was applied, consisting of planning, development, and evaluation stages, along with Tessmer’s formative evaluation, including self-evaluation, expert review, one-to-one evaluation, and small group evaluation. Expert validation results showed a 97.5% (very valid) feasibility level, while student responses in the trial stage reached 89.6% (very practical). The digital visualization of the wave function Ψ(x,t), eigenstates in a one-dimensional potential well, and the |Ψ|² graph effectively helped students relate the Schrödinger equation to the concepts of energy quantization and probability.
EFFECT OF LIQUID DENSITY FROM TAPIOCA STARCH ON FLUID FLOW AJ, Suharli; Cahyati, Nilam; Cahyani Putri, Dwi; Risva, Risva; Rosa Winda, Febrina
Jurnal Pendidikan Matematika dan IPA Vol. 17 No. 3 (2026): September 2026
Publisher : Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jpmipa.v17i3.111525

Abstract

This study aims to investigate the effect of variations in the liquid density of tapioca starch on fluid flow characteristics, particularly flow velocity and fluid jet distance, and to examine the relationship between fluid density and flow dynamics. The research used an experimental method. Density, flow velocity, and jet distance were measured and analysed using fluid equations based on Bernoulli's Principle and Torricelli's Law, while density was calculated from the ratio of the mass of tapioca flour to its volume. The results demonstrate that increasing fluid density through the addition of tapioca starch, from 1066.67 to 1333.33 kg/m³, progressively reduced both flow velocity and fluid jet distance. Specifically, the flow velocity decreased from 1.33 to 1.09 m/s, while the fluid jet distance decreased from 0.22 to 0.15 m across the investigated density range. Furthermore, the density of the tapioca starch suspension is also influenced by the granule size and the arrangement of particles within the suspension. These findings confirm that density is a key factor governing the flow characteristics of fluids.
Co-Authors Arandi, Tyas Al Cahyani Putri, Dwi Hamdi Akhsan Markos Siahaan, Sardianto Naufal, Muhammad Risyad Nely Andriani, Nely Nur'Aini, Siti Risva Risva Rodhiyah, Marathur Rosa Winda, Febrina Suharli AJ Supardi