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All Journal Jurnal Nalar Pendidikan Indonesian Journal of Chemistry
Ariyaldi, Ariyaldi
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Chemical Engineering, Chemistry & Bioengineering Chemistry Education

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Pengaruh Penggunaan Startegi Dynamic Problem Solving Berbasis Conceptual Scaffolding untuk Meningkatkan Hasil Belajar Peserta Didik pada Materi Sifat Koligatif Larutan Ariyaldi, Ariyaldi; Putri, Asmawati Tri; Khalisah, Andi Nur; Nurhikma, Nurhikma
JURNAL NALAR PENDIDIKAN Vol 5, No 2 (2017): JURNAL NALAR PENDIDIKAN
Publisher : Lembaga Penelitian Mahasiswa Penalaran UNM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26858/jnp.v5i2.4875

Abstract

AbstractThis study aims to determine the effect of dynamic problem solving strategy based on conceptual scaffolding on learning outcomes and learning activities of learners on the material of the colligative nature of solution. This research uses experimental method with true experimental design in the form of pretest-posttest control group design. Population in this research is students class XII which study material of colligative nature of solution at SMAN 5 Makassar. The sample in this study is the students of class XII IPA consisting of two classes, namely experimental class and control class. The sampling technique used in this research is random sampling. Data analysis techniques using descriptive analysis techniques and inferential statistical analysis which includes assumption test and hypothesis test. The data showed that there was difference in learning outcomes of learners and activities between the control class and the experimental class.  Keywords: Conceptual scaffolding, Colligative properties of solution, Dynamic problem solvingAbstrak Penelitian ini bertujuan untuk mengetahui pengaruh strategi dynamic problem solving berbasis conceptual scaffolding terhadap hasil belajar dan aktivitas belajar peserta didik pada materi sifat koligatif larutan. Penelitian ini menggunakan metode eksperimen dengan desain true experimental dengan bentuk yang digunakan saat uji lapangan yaitu berbentuk pretest-postestcontrol group design. Populasi dalam penelitian ini adalah siswa kelas XII yang mempelajari materi sifat koligatif larutan di SMAN 5 Makassar. Sampel dalam penelitian ini adalah siswa kelas XII IPA yang terdiri dari dua kelas yaitu kelas eksperimen dan kelas kontrol. Teknik sampling yang digunakan dalam penelitian ini adalah randomsampling.  Teknik analisis data menggunakan teknik analisis deskriptif dan analisis statistik inferensial yang meliputi uji asumsi dan uji hipotesis. Data hasil penelitian menunjukkan bahwa terdapat perbedaan hasil belajar peserta didik dan aktivitas antara kelas kontrol dan kelas eksperimen. Kata Kunci: Conceptual scaffolding, Sifat koligatif larutan, Dynamic problem solving
Studies on the Loading and Release of Metformin HCl Using Hydrogels with EGDMA and MBA as Crosslinkers Ariyaldi, Ariyaldi; Nizardo, Noverra Mardhatillah; Lestari, Maria Lucia Ardhani Dwi
Indonesian Journal of Chemistry Vol 25, No 1 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.95826

Abstract

Hydrogel poly(N-vinylcaprolactam-co-2-(dimethylamino)ethylmethacrylate) or (P(NVCL-co-DMAEMA)) containing the active drug metformin HCl were synthesized using the free radical polymerization method in the presence of DMAEMA and NVCL monomers by using two different crosslinkers: ethylene glycol dimethacrylate (EGDMA) and methylene bisacrylamide (MBA). FTIR spectra confirmed the successful formation of hydrogel and its loading with metformin HCl. SEM analysis revealed the physical shape and surface features. Regarding physical appearance, the texture of the hydrogel is sticky and elastic. When the hydrogel was immersed in a solution, it swelled, and returned to its original shape after drying. Additionally, the chemical degradation temperature is thermally stable at 329.75 °C. The loading test results showed that the active drug in EGDMA was 18.38 (% w/w) and 26.19 (% w/w) in MBA as crosslinkers, loaded within 24 h. The drug-loaded hydrogel containing EGDMA as crosslinkers in pH 7.4 had the highest drug release in 24 h compared to MBA. Then, the drug released from hydrogel with EGDMA in pH 2 had the highest drug release than MBA within 30 min. The P(NVCL-co-DMAEMA) hydrogel has the potential for a drug delivery system. However, additional optimizations are necessary to improve the efficiency of the hydrogels as a carrier.
Co-Authors Khalisah, Andi Nur Maria Lucia Ardhani Dwi Lestari Noverra Mardhatillah Nizardo Nurhikma, Nurhikma Putri, Asmawati Tri