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All Journal Jurnal Pendidikan IPA Indonesia Jurnal Litbang Industri
Khoiriah Khoiriah, Khoiriah
SMP Negeri 16 Bandar Lampung, Indonesia
Education Industrial & Manufacturing Engineering

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THE EFFECT OF MULTIMEDIA-BASED TEACHING MATERIALS IN SCIENCE TOWARD STUDENTS’ COGNITIVE IMPROVEMENT Khoiriah, Khoiriah; Jalmo, Tri; Abdurrahman, Abdurrahman
Jurnal Pendidikan IPA Indonesia Vol 5, No 1 (2016): April 2016
Publisher : Program Studi Pendidikan IPA Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpii.v5i1.5793

Abstract

This study is a meta-analysis study that aimed to determine the effect of multimedia-based teaching materials in science learning to students cognitive enhancement. This study integrated primary study results of several studies that had been published in national and international journals. The method used in this research was the analysis of the results of seven international journals and three national journals involving multimedia teaching materials based on science learning as the main study. Searches were done through the search engine Google, using Eric Journal and Google scholar with keyword multimedia-based teaching materials. Analysis of data was the description of the results of the average effect size of each study sampled then categorized based on Cohens interpretation. The results showed that multimedia-based teaching materials in science learning had a significant influence on students cognitive learning outcomes indicated by the average effect size of 0.78. Differences in cognitive enhancement were based on a group of countries, fields of study, education level and the variety of multimedia teaching materials. It was concluded that the multimedia-based teaching materials in science learning showed a significant effect on students cognitive enhancement.
Degradasi Zat Warna Direct Red-23 dan Direct Violet Dengan Metode Ozonolisis, Fotolisis Dengan Sinar Uv dan Cahaya Matahari Menggunakan Katalis N-Doped TiO2 Safni, Safni; Anggraini, Deby; Wellia, Diana Vanda; Khoiriah, Khoiriah
Jurnal Litbang Industri Vol 5, No 2 (2015)
Publisher : Institution for Industrial Research and Standardization of Industry - Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1259.876 KB) | DOI: 10.24960/jli.v5i2.675.123-130

Abstract

Direct red-23 and Direct violet are non-biodegradable compounds containing azo component and carcinogenic. Direct red-23 and Direct violet had been degraded by ozonolysis, photolysis with UV lamp and solar irradiation methods using N-doped TiO2 catalyst. UV/Vis Spectrophotometer at wavelength 300-800 nm was used to measure the absorption of sample solution. The optimum weight of N-doped TiO2 catalyst was 20 mg. From the three methods obtained that ozonolysis method was the faster degradation process than photolysis with UV and solar irradiation. Direct red-23 and Direct violet was degraded as much as 55 and 50% within 20 minutes by ozonolysis.ABSTRAKZat warna Direct red-23 dan Direct violet merupakan senyawa non-biodegradable yang mengandung senyawa azo dan bersifat karsinogen. Direct red-23 dan Direct violet didegradasi menggunakan metode ozonolisis, fotolisis dengan sinar UV dan dengan penyinaran matahari, tanpa dan dengan katalis N-doped TiO2. Hasil penelitian diukur dengan spektrofotometer UV-Vis pada panjang gelombang 300-800 nm. Berat optimum katalis N-doped TiO2 didapatkan 20 mg. Dari ketiga metode didapatkan bahwa proses degradasi pada metode ozonolisis paling cepat dibandingkan dengan fotolisis sinar UV dan cahaya matahari. Direct red-23 dan Direct violet dapat didegradasi sebanyak 55 dan 50% dalam waktu 20 menit.
Co-Authors Abdurahman Abdurrahman Adi Wiratno, Adi Anggraini, Deby Safni Safni Tri Jalmo Wellia, Diana Vanda