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All Journal Jurnal Entropi Jurnal Inovasi Sainstek Jurnal Pengabdian Pada Masyarakat Jurnal Pendidikan Kimia (JPKim) Indonesian Journal of Chemistry Jambura Journal of Educational Chemistry Jambura Journal of Chemistry Jurnal Sibermas (Sinergi Pemberdayaan Masyarakat)
Weny J.A Musa
Universitas Negeri Gorontalo
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Decision Sciences, Operations Research & Management Education Engineering Environmental Science Medicine & Pharmacology Public Health Social Sciences Other

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THE PORIFERASTA COMPOUND-5,22E,25-TRIEN-3-Oβ FROM Clerodendrum paniculatum LEAF AS INDUCER AGENT OF SYSTEMIC RESISTANCE ON RED CHILLI PLANT Capsicum annuum L FROM CUCUMBER MOSAIC VIRUS (CMV) Weny Musa; Hersanti Hersanti; Achmad Zainuddin; Roekmi-ati Tjokronegoro
Indonesian Journal of Chemistry Vol 9, No 3 (2009)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (258.74 KB) | DOI: 10.22146/ijc.21521

Abstract

The poriferasta-5.22E.25-trien-3β-ol compound of leaves of this plant Clerodendrum paniculatum has activity as an inducer agent of plant systemic resistance of red plant toward Cucumber Mosaic Viruses (CMV), the inhibition activity compound shows 82% inhibition activity at 300 ppm. The structure of these compound were determined on the basis of spectroscopic data including UV, IR, 1H-NMR, 13C-NMR and 2D-NMR
Pengujian Kualitas Kimia dan Fisika Limbah Cair Pada Industri Kecil dan Menengah di Daerah Aliran Sungai (DAS) Poso Kabupaten Gorontalo Utara Iswan Dunggio; Weny J.A Musa
Jambura Journal of Chemistry Vol 4, No 2 (2022): August
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34312/jambchem.v4i2.14281

Abstract

Pencemaran limbah di wilayah Daerah Aliran Sungai (DAS) yang diakibatkan oleh industri baik skala kecil dan industri besar sangat sulit dihindari karena penyebarannya sulit terdeteksi. Tujuan penelitian ini adalah untuk menganalisis kualitas limbah cair industri kecil menengah (IKM) di DAS Poso yang terletak di Kabupaten Gorontalo Utara. Penelitian dilaksanakan di wilayah DAS Poso Kabupaten Gorontalo Utara. Data kualitas limbah cair diambil dengan metode sampling. Pengambilan sampel limbah cair dilakukan secara langsung di badan air yang sedang dipantau. Pengambilan sampel dilakukan pada inlet dan outlet. Pengujian parameter fisik dilakukan dilapangan sedangkan parameter kimia dan biologi dilakukan di laboratorium. Hasil analisis menemukan kualitas limbah cair hasil produksi IKM tahu Total Suspended Solid (TSS) tidak memenuhi baku mutu kualitas limbah cair di lokasi inlet. Sedangkan lokasi outlet masih memenuhi standar mutu limbah cair. Tingginya TSS pada kluster IKM tahu berdampak pada meningkatnya indikator kimia berupa Biological Oxygen Demand (BOD) dan Chemical Oxygen Demand COD di lokasi inlet IKM tahu. Selanjutnya hasil identifikasi TSS pada wilayah outlet IKM minyak kelapa tidak memenuhi syarat dan berpotensi merusak lingkungan di DAS. Kekeruhan akibat TSS tinggi menimbulkan kemampuan organisme untuk mengurai limbah cair menjadi berkurang dan berdampak pada peningkatan parameter BOD dan COD
The Effect of STEM-Based Project-Based Learning (PjBL) on Students’ Scientific Thinking Skills in Reaction Rate Yuliana Pariyonga; Weny J.A Musa; Thayban Thayban; Lukman Abdul Rauf Laliyo; La Alio
Jambura Journal of Educational Chemistry Vol 8, No 2 (2026): August
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jjec.v8i2.38737

Abstract

Reaction rate is one of the most complex topics in chemistry and remains difficult for students to understand. This condition highlights the need for more effective instructional approaches to enhance students' scientific thinking skills.This study was conducted to analyze the effect of implementing the STEM-based Project-Based Learning (PjBL) model on the scientific thinking skills of Grade XII students in the topic of reaction rates. The research employed a quasi-experimental method using a non-equivalent control group design involving 52 students divided into an experimental class and a control class. The research instrument consisted of nine essay questions with a high level of reliability, as indicated by a Cronbach’s Alpha value of 0.740. The findings revealed that the implementation of the STEM-based PjBL model significantly enhanced students’ scientific thinking skills. This improvement was evident across all indicators measured in the experimental class, including the logical indicator, which reached 75.9%, the analytical indicator at 68.1%, the systematic indicator at 59.1%, the deductive indicator at 59.9%, and the inductive indicator, which increased to 68.1%. Furthermore, the effect size analysis yielded a score of 1.632, which falls into the very large category. Therefore, it can be concluded that the implementation of the STEM-based Project-Based Learning (PjBL) model had a very strong effect on improving students’ scientific thinking skills.
Co-Authors Achmad Zainuddin Ahmad Kadir Kilo Anwar, Zois Bintaria, Harianti Boima Situmeang Boima Situmeang Dewi Wahyuni K. Baderan Diky Kurniawan Fauziah, Eka Donna Hariani, Wa Helda Olii Hersanti - Ibrahim, Agus Malik Ishak Isa Iswan Dunggio La Alio Lukman A. R. Laliyo M Amrin Sunardi Mardjan Mardjan Mardjan Paputungan Muhridja, Melisa Murniati . Nurhayati Bialangi Riska Aksara Roekmi-ati Tjokronegoro Ruslan, Rusnawati Saronom Silaban Sriwijayanti Suleman Duengo Susparini, Ninik Triayu Thayban, Thayban Wulansari, Najwa Shanti Yuliana Pariyonga Yuszda K Salimi Zukria .