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All Journal JFA (Jurnal Fisika dan Aplikasinya) Nizhamiyah
Erliza Septia Nagara
Institut Bakti Nusantara
Education Physics

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Natural Dyes Extraction of Curcuma Longa, Tradescantia Spatacea, and Bryophyta Absorption Capability on TiO2 Nanofiber Thin Layer Novita Asma Ilahi; Fadillah Hazrina; Afrizal Abdi Musyafiq; Ahmad Aftah Syukro; Erliza Septia Nagara
Jurnal Fisika dan Aplikasinya Vol 19, No 1 (2023)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat, LPPM-ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j24604682.v19i1.14068

Abstract

Exploration of plant variations is required to determine the absorbance ability and potential utilization of dye in the development of Dye-Sensitized Solar Cells (DSSC). Extraction of four different plants was carried out to obtain three different types of natural dyes. The curcumin dye was obtained from the extraction of Curcuma longa, the chlorophyl dye was obtained from the extraction of Bryophytes, the anthocyanin dye was obtained from the extraction of Brassica oleracea var capitata f. rubra, and Tradescantia spathacea. The research was conducted to determine the absorbance capability of each different type of dye and the image of the thin layer of TiO2 nanofiber used by DSSC. Extraction is carried out through a drying and pounding process. The powder of each plant was then synthesized using ethanol through a homogenization process for 12 hours. The research utilizes a spectrophotometer UV-Visible to determine the wavelength of the natural dye, as well as a scanning electron microscope (SEM) to determine the size of the titanium dioxide (TiO2) thin film nanofiber based on the displayed image. DSSC utilizes TiO2 nanofiber as a thin layer of semiconductor. The dye absorption peak is in the wavelength range of 350-500 nm and 650-700 nm. Based on the analysis of absorbance results, curcumin dye has the greatest potential to be used in DSSC with the highest absorption ability in all its occurrences at visible light wavelengths.
IMPLEMENTASI MODEL PEMBELAJARAN STAD GUNA MENINGKATKAN HASIL BELAJAR MATA PELAJARAN PKN SISWA KELAS II SDN KETEGUHAN Ponidi, Ponidi; Sinthiya, Ida Ayu Putu Anggie; Nagara, Erliza Septia
NIZHAMIYAH Vol 13, No 2 (2023): NIZHAMIYAH
Publisher : Universitas Islam Negeri Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30821/niz.v13i2.3244

Abstract

ABSTRAK: Pelaksanaan Penelitian ini bertujuan untuk meningkatan hasil belajar pada mata pelajaran PKn melalui model pembelajaran STAD pada siswa kelas II SDN Keteguhan. Jenis penelitian ini adalah Penelitian Tindakan Kelas (Classroom Action Research), dengan subjek penelitian yang berjumlah 22 siswa. Objek penelitian ini adalah hasil belajar siswa yang diperoleh dari penerapan model STAD.Hasil penelitian menunjukkan bahwa pelaksanaan pembelajaran melalui model STAD dapat meningkatkan hasil belajar siswa kelas II SDN Keteguhan. Peningkatan hasil belajar siswa dengan menggunakan model STAD dari pra siklus siswa yang tuntas mencapai 8 siswa dengan persentase 36%, pada siklus I meningkat menjadi 14 siswa yang tuntas dengan persentase 64%, dan pada siklus II meningkat kembali menjadi 19 siswa yang tuntas dengan persentase mencapai 86%. Terkait dengan adanya  peningkatan hasil belajar siswa ini peneliti bersama kolaborator menyampaikan pendapat bahwasannya model pembelajaran STAD ini sangat cocok diterapkan dalam proses pembelajaran, hal ini sebabkan banyaknya perubahan peningkatan hasil belajar di setiap tahapan yang dilaksanakan oleh peneliti.Kata kunci : STAD, PKn, dan hasil belajarABSTRACT: The implementation of this research aims to improve learning outcomes in Civics subjects through the STAD learning model for class II students at SDN Keteguhan. This type of research is Classroom Action Research, with research subjects totaling 22 students. The object of this research is student learning outcomes obtained from implementing the STAD model.The results of the research show that implementing learning through the STAD model can improve the learning outcomes of class II students at SDN Keteguhan. The increase in student learning outcomes using the STAD model from the pre-cycle of students who completed it reached 8 students with a percentage of 36%, in the first cycle it increased to 14 students who completed it with a percentage of 64%, and in the second cycle it increased again to 19 students who completed it with a percentage of 64%. 86%. Regarding the increase in student learning outcomes, the researcher and collaborators expressed the opinion that the STAD learning model is very suitable to be applied in the learning process, this has resulted in many changes in improving learning outcomes at each stage carried out by the researcher.Keywords: STAD, Civics, and Learning Outcomes
Co-Authors Afrizal Abdi Musyafiq Ahmad Aftah Syukro Anggie Sinthiya, Ida Ayu Putu Fadillah Hazrina Novita Asma Ilahi Ponidi, Ponidi