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All Journal JOURNAL OF SCIENCE AND SOCIAL RESEARCH Jurnal Biotek
Sri Lestari
Universitas Islam Negeri Sumatera Utara
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Economics, Econometrics & Finance Education Social Sciences

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Efektivitas Model Pembelajaran PJBL Terhadap Hasil Belajar Peserta Didik Pada Materi Pencemaran Lingkungan Terintegrasi Keislaman Sri Lestari; Efrida Pima Sari Tambunan; Irwan Syahputra
Jurnal Biotek Vol 10 No 2 (2022): DESEMBER
Publisher : Department of Biology Education of Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jb.v10i2.33028

Abstract

The use of learning models that are less precise and do not vary the impact on learning outcomes for low learners. This study aims to determine the effectiveness of the PJBL learning model on the learning outcomes of integrated environmental pollution Islamic material. The study was conducted at MAN Tebing Tinggi in July. This type of research is quantitative. This research used a quasi-experiment with a pretest-posttest control group design. The research sample of two classes of PMIPA 1 and PMIPA 2 in Man Tebing Tinggi was collected using simple random sampling techniques and subject analysis with 72 students. Test instruments used in the form of test questions conducted at the beginning of learning (pretest) and the end of learning (posttest) include as many as 25 questions. Data analysis of student learning outcomes with the data processing software SPSS 21 using the formulas T-test and N-gain test Based on the hypothesis test obtained, the learning model of PjBL affects the learning outcomes of students' understanding of environmental pollution material in Man Tebing Tinggi with a t-test of 0.230. The N-Gain test results showed that the PjBL learning model was effective in improving the learning outcomes of students in the Islamic integrated environmental pollution material at MAN Tebing Tinggi, with an N-Gain of 0.72 in the high category.
RANCANG BANGUN DAN UJI KINERJA SISTEM DETEKSI FORMALIN PADA IKAN MENGGUNAKAN SENSOR MQ-138 BERBASIS ARDUINO Sri Lestari; Mulkan Iskandar Nasution; Nazaruddin Nasution
JOURNAL OF SCIENCE AND SOCIAL RESEARCH Vol. 9 No. 2 (2026): April 2026
Publisher : Smart Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54314/pkddvr88

Abstract

Penelitian ini bertujuan untuk merancang dan menguji alat pendeteksi kadar formalin pada ikan segar dan ikan asin berbasis mikrokontroler Arduino Uno menggunakan sensor MQ-138. Penelitian dilakukan melalui tahap perancangan perangkat keras, pemrograman sistem, kalibrasi sensor, serta pengujian dan analisis data. Pengujian pada sampel ikan segar dengan variasi konsentrasi formalin 1–3% menunjukkan hasil pembacaan sensor sebesar 0,090–0,120 mg/m³, sedangkan alat standar menunjukkan nilai 0,099–0,121 mg/m³ dengan deviasi maksimum 9,09%. Pada sampel ikan asin dengan konsentrasi yang sama, sensor mendeteksi kadar formalin sebesar 0,080–0,100 mg/m³, sedangkan alat standar 0,081–0,106 mg/m³ dengan deviasi lebih kecil, yaitu 1,23%–5,66%. Hasil penelitian menunjukkan bahwa sensor MQ-138 mampu mendeteksi kadar formalin dengan tingkat akurasi yang cukup baik dibandingkan alat standar. Sistem yang dilengkapi LED dan buzzer juga berhasil memberikan peringatan visual dan audio ketika kadar melebihi ambang batas yang ditetapkan.
Co-Authors Efrida Pima Sari Tambunan Irwan Syahputra Mulkan Iskandar Nasution Nazaruddin Nasution