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All Journal Jurnal Riset Kimia JURNAL PENDIDIKAN TAMBUSAI
Azimatur Rahmi
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Chemistry Social Sciences

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EKSTRAK METANOL DARI DAUN MAHKOTA DEWA (Phaleria macrocarpa) SEBAGAI INHIBITOR KOROSI BAJA DALAM ASAM KLORIDA Rahmi, Azimatur; -, Emriadi; Alif, Admin
Jurnal Riset Kimia Vol 7, No 2 (2014): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v7i2.168

Abstract

Vol 7 No 2ABSTRACTExtract of Phaleria macrocarpa leaves have been studied as corrosion inhibitor for mild steel ofhydrochloric acid solution 2.0 N. The efficiency of inhibition was evaluated by gasometric methodand electrochemical analysis. The temperature and concentration effects on the inhibitorsperformance were also investigated. The result obtained showed that the extract is one of promisingcandidate as an inhibitors for the corrotions of mild steel in HCl media, inhibition efficiencyincrease as the extract concentration is evaluated. The activation energy (Ea) increase with theaddition of the extract. Where inhibition of extract on the steel surface obey modified Langmuirisotherm equation. Potentiodynamic polarization curve indicated the Phaleria macrocarpa leavesextract play role as the anodic type inhibitor.Keywords : Corrosion inhibition, mild steel, Phaleria macrocarpa, hydrochloric acid.
PEMBELAJARAN SENI TARI TRADISIONAL MINANG KABAU PADA ANAK USIA DINI SEBAGAI PENERUS BANGSA Rahmi, Azimatur; Mayar, Farida
Jurnal Pendidikan Tambusai Vol. 3 No. 3 (2019): December 2019
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai, Riau, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (207.745 KB) | DOI: 10.31004/jptam.v3i3.340

Abstract

Pembelajaran sebagai proses pembentukan pribadi, pemebelajaran diartikan sebagai suatu kegiatan yang membentuknya kepribadian peserta didik. pembelajaran agar peserta didik secara aktif mengembangkan potensi dirinya untuk memiliki kekuatan spritual keagamaan, pengendalian diri, kepribadian, kecerdasan, akhlak mulia, serta keterampilan yang diperlukan dirinya,dalam masyarakat, bangsa dan negara. Seni tari tradisional sangat identik dengan kearifan budaya lokal. Seni taritradisimerepresentasikan kehidupan masyarakat lokal yang ditopang oleh keluhuran budi yang arif, bijaksana, keteladanan, dan cendekia serta sangat identik dengan kearifan budaya lokal. Melalui eksistensi pertunjukannya, seni tradisi merepresentasikan kehidupan masyarakat lokal yang ditopang oleh keluhuran budi yang arif, bijaksana, keteladanan, dan cendekia. Maka pentingnya pembelajaran seni tari tradisional untuk memperkenalkan budaya pada anak usia dini sebagai penerus bangsa.
Uji Aktivitas Antioksidan dan Fenolik Total Fraksi Etil Asetat Daun Sembung (Blumea balsamifera (L.) DC) Rahmi, Azimatur; Afriani, Tika; Hevira, Linda; Widiawati, Wike
Jurnal Riset Kimia Vol 12, No 2 (2021): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v12i2.383

Abstract

The aim of this study is to investigate antioxidant activity and total phenolic content of ethyl acetate fraction of Sembung leaves. Sembung (Blumea balsamifera L.) is a plant that has the potential as an antioxidant because it contains secondary metabolites of alkaloids, steroids, flavonoids, saponins, and phenolic compounds. In this study, antioxidant activity was tested by using 1,1-diphenyl-2-picrylhydrazyl (DPPH) for free radical scavenging activity assay. Evaluation of total phenolic content was tested by using the Folin-Ciocalteau method. The results showed that the ethyl acetate fraction of Sembung leaves possess showed medium antioxidant activity with IC50 valueof 221.821 compare with reference standard ascorbic acid with IC50 value 68.25 ppm. The ethyl acetate fraction of Sembung leaves has a total phenolic content of 161.101 mg GAE/g. This study provided that Blumea balsamifera leaves possess antioxidant.
EKSTRAK METANOL DARI DAUN MAHKOTA DEWA (Phaleria macrocarpa) SEBAGAI INHIBITOR KOROSI BAJA DALAM ASAM KLORIDA Azimatur Rahmi; Emriadi -; Admin Alif
Jurnal Riset Kimia Vol. 7 No. 2 (2014): March
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v7i2.168

Abstract

Vol 7 No 2ABSTRACTExtract of Phaleria macrocarpa leaves have been studied as corrosion inhibitor for mild steel ofhydrochloric acid solution 2.0 N. The efficiency of inhibition was evaluated by gasometric methodand electrochemical analysis. The temperature and concentration effects on the inhibitorsperformance were also investigated. The result obtained showed that the extract is one of promisingcandidate as an inhibitors for the corrotions of mild steel in HCl media, inhibition efficiencyincrease as the extract concentration is evaluated. The activation energy (Ea) increase with theaddition of the extract. Where inhibition of extract on the steel surface obey modified Langmuirisotherm equation. Potentiodynamic polarization curve indicated the Phaleria macrocarpa leavesextract play role as the anodic type inhibitor.Keywords : Corrosion inhibition, mild steel, Phaleria macrocarpa, hydrochloric acid.
Co-Authors Admin Alif Admin Alif Afriani, Tika Emriadi - Farida Mayar Hevira, Linda Linda Hevira Nadya Hardi Widiawati, Wike