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All Journal Jurnal Pendidikan Fisika Indonesia Tropical Animal Science Journal JCES (Journal of Character Education Society)
A. Astuti, A.
Laboratorium Fisika Material.Jurusan Fisika, Universitas Andalas Kampus Universitas Andalas, Limau Manis, Padang 25163
Agriculture, Biological Sciences & Forestry Education Energy Physics

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PEMBUATAN ELEKTRODA KARBON BERPORI DARI TEMPURUNG KEMIRI DAN PERANCANGAN PROTOTIPE SISTEM CAPACITIVE DEIONIZATION (CDI) UNTUK DESALINASI AIR PAYAU Astuti, A.; Taspika, M.
Jurnal Pendidikan Fisika Indonesia Vol 11, No 1 (2015): January 2015
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v11i1.4008

Abstract

Telah dilakukan pembuatan karbon aktif dengan bahan dasar tempurung kemiri menggunakan H3PO4 2,5% sebagai aktivator dengan suhu aktivasi (400, 500, dan 600) oC.Luas permukaan aktif yang dihasilkan masing-masing adalah (6,6; 95,6; dan 391,6) m2/g. Karbon yang diaktivasi pada suhu 600 oC digunakan sebagai bahan dasar pembuatan elektroda kapasitor untuk system capacitive deionization (CDI) menggunakan polimer polyvinyl alcohol (PVA) sebaga ipengikat. Berdasarkan data voltammogram siklik terhadap elektroda CDI diperoleh besar kapasitansi spesifik elektroda adalah 50,21 mF/g.  Proses desalinasi dilakukan pada larutanNaCl 0,24 M dengan menyusun elektroda menggunakan system monopolar dan diberitegangan DC 1,2 V.  Penurunan konduktivitas larutan NaCl menggunakan sistem CDI ini sebesar 61,58%, dengan penurunan kadar natrium dalam larutan NaCl yaitu dari 138,0 mg/L menjadi 80,7 mg/L  selama 40 menit. Karbon aktif tempurung kemiri ini sangat potensial untuk dikembangkan sebagai elektroda CDI untuk sistem desalinasi air payau.The writers had done the research of the activated carbon that prepared with the candlenut shell by using H3PO4 2,5% as the activating agent.  All samples were heated at the temperatures of (400, 500, and 600) oC.  The activated carbon have specific surface area (6.582; 95.623; and 391.567) m2/g respectively. Capacitor electrode for capacitive deionization (CDI) was fabricated by using activated carbon that was heated at activation temperature of 600 oC with polyvinyl alcohol (PVA) as the binder. Based on cyclicvoltammogram of electrode, specific capacitance of CDI electrode is 50.21 mF/g.  To observe desalination process of electrode, CDI was made by monopolar system and immersed in NaCl 0.24 M as brackish water sample.  Direct current voltage 1.2 V was applied to CDI cell.  The decreased of NaCl conductivity with CDI system respectively is 61.58%.  Sodium concentration in NaCl decreases from 138.000 mg/L to 80.667 mg/Labout 40 minutes of desalination process.The activated carbon that prepared from candlenut shell is potential to develop as CDI system for desalination of brakish water.
PEMBUATAN ELEKTRODA KARBON BERPORI DARI TEMPURUNG KEMIRI DAN PERANCANGAN PROTOTIPE SISTEM CAPACITIVE DEIONIZATION (CDI) UNTUK DESALINASI AIR PAYAU Astuti, A.; Taspika, M.
Jurnal Pendidikan Fisika Indonesia Vol 11, No 1 (2015)
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpfi.v11i1.4008

Abstract

Telah dilakukan pembuatan karbon aktif dengan bahan dasar tempurung kemiri menggunakan H3PO4 2,5% sebagai aktivator dengan suhu aktivasi (400, 500, dan 600) oC.Luas permukaan aktif yang dihasilkan masing-masing adalah (6,6; 95,6; dan 391,6) m2/g. Karbon yang diaktivasi pada suhu 600 oC digunakan sebagai bahan dasar pembuatan elektroda kapasitor untuk system capacitive deionization (CDI) menggunakan polimer polyvinyl alcohol (PVA) sebaga ipengikat. Berdasarkan data voltammogram siklik terhadap elektroda CDI diperoleh besar kapasitansi spesifik elektroda adalah 50,21 mF/g.  Proses desalinasi dilakukan pada larutanNaCl 0,24 M dengan menyusun elektroda menggunakan system monopolar dan diberitegangan DC 1,2 V.  Penurunan konduktivitas larutan NaCl menggunakan sistem CDI ini sebesar 61,58%, dengan penurunan kadar natrium dalam larutan NaCl yaitu dari 138,0 mg/L menjadi 80,7 mg/L  selama 40 menit. Karbon aktif tempurung kemiri ini sangat potensial untuk dikembangkan sebagai elektroda CDI untuk sistem desalinasi air payau.The writers had done the research of the activated carbon that prepared with the candlenut shell by using H3PO4 2,5% as the activating agent.  All samples were heated at the temperatures of (400, 500, and 600) oC.  The activated carbon have specific surface area (6.582; 95.623; and 391.567) m2/g respectively. Capacitor electrode for capacitive deionization (CDI) was fabricated by using activated carbon that was heated at activation temperature of 600 oC with polyvinyl alcohol (PVA) as the binder. Based on cyclicvoltammogram of electrode, specific capacitance of CDI electrode is 50.21 mF/g.  To observe desalination process of electrode, CDI was made by monopolar system and immersed in NaCl 0.24 M as brackish water sample.  Direct current voltage 1.2 V was applied to CDI cell.  The decreased of NaCl conductivity with CDI system respectively is 61.58%.  Sodium concentration in NaCl decreases from 138.000 mg/L to 80.667 mg/Labout 40 minutes of desalination process.The activated carbon that prepared from candlenut shell is potential to develop as CDI system for desalination of brakish water.
EDUKASI PROSEDUR PENJAMINAN MUTU PRODUK PERTANIAN BERBASIS MIKROBA PADA KELOMPOK PETANI PENGEMBANG AGENSIA HAYATI Astuti, A.; Aisyah, Siti Nur; Wijaya, O.
JCES (Journal of Character Education Society) Vol 6, No 2 (2023): April
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jces.v6i2.10272

Abstract

Abstrak: Kegiatan ini bertujuan untuk mengedukasi kelompok petani pengembang agensia hayati (PPAH) tentang prosedur penjaminan mutu untuk produk-produk berbasis mikroba. Tahapan penjaminan mutu dalam produksi produk berbasis mikroba sejauh ini hanya dapat dilakukan oleh laboratorium. Hal ini menyulitkan kelompok PPAH untuk memastikan kualitas produk yang dihasilkan karena bergantung pada laboratorium pelaksana penjaminan mutu. Kegiatan ini melibatkan kelompok PPAH Dadi Makmur dan dilakukan melalui sejumlah tahapan, yakni penyuluhan tentang standar mutu produk, pendampingan uji mutu empat produk mikroba, dan pendampingan pembaruan label produk. Penerimaan dan perubahan wawasan mitra dievaluasi melalui pre-test dan post-test. Hasil menunjukkan bahwa wawasan anggota PPAH mengalami peningkatan menjadi 75% terkait mutu produk dan profesionalisme layanan. Sementara itu, keterampilan anggota PPAH juga meningkat menjadi 50% dalam hal pelaksanaan uji mutu produk. Selain itu, semua produk memperlihatkan mutu yang telah memenuhi SNI dan telah diperbarui labelnya.Abstract: This activity was aimed to educate the farmers group for biological agent production (FGBAP) related to the procedure of quality assurance for microbial products. Quality assurance in the production of microbial product for agricultural purposes, so far, is performed by laboratory only. This condition complicates the FGBAP to ensure the quality of its microbial products due to high dependency on local laboratory. Therefore, This activity involved FGBAP Dadi Makmur and was performed through discussion about standard quality of product, workshop of quality assurance and product label refinement. Participant responses were evaluated through pre-test and post-test. The results showed the increase of insights from the FGBAP members was recorded up to 75% related to product quality and service professionalism. However, the member’s capacity in performing quality assurance also increased up to 50%. In addition, all products developed by this FGBAP have met the national standards and labelled properly.
Nutrient Digestibility, N Balance, Performance, and Blood Parameters of Kacang Goats Differing in GDF9 Genotype Fed Different Sources of Dietary Fiber Irawan, A.; Hartatik , T.; Bintara, S.; Astuti, A.; Kustantinah
Tropical Animal Science Journal Vol. 47 No. 1 (2024): Tropical Animal Science Journal
Publisher : Faculty of Animal Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5398/tasj.2024.47.1.33

Abstract

This study aims to determine the impact of different GDF9 genotypes on feed intake, nutrient digestibility, and nitrogen balance in Kacang goats by examining various metabolic processes. Twenty-nine Kacang goats were genotyped using PCR-RFLP DNA at position g.3855A/C of the GDF9 gene in exon 2. A 2 × 2 factorial design with two factors, namely, diet type (diets 1 and 2) and genotype (homozygote AA and heterozygote AC), was adopted. Diet 1 group comprised 11 goats with the AA genotype and 4 goats with the AC genotype, and the diet 2 group consisted of 9 goats with the AA genotype and 5 goats with the AC genotype. Both diets had the same protein content (iso-protein) and consisted of free-choice Napier grass (Pennisetum purpureum). Diet 1 had an additional 400 g of concentrate containing 11.25% crude protein (CP) and 55.86% total digestible nutrients (TDN). Diet 2 was a total mixed ration (TMR) containing 12.46% crude protein and 67.92% TDN. Results demonstrated a significant interaction (p<0.05) effect between diet and genotype on crude protein (CP) digestibility, neutral detergent fiber (NDF) digestibility, fecal nitrogen (N feces), urinary nitrogen (N urine), nitrogen retention (%), and blood urea nitrogen (BUN). However, no significant interaction effect was observed on the consumption of dry matter (DM), CP, crude fiber (CF), nitrogen free extract (NFE), and NDF and the digestibility of DM, CF, and NFE. TMR resulted in a 9% higher consumption of NDF, higher nutrient digestibility, improved nitrogen balance, average daily gain (ADG), and elevated glucose levels compared with diet 1. Kacang goats with the AC genotype exhibited better CP digestibility and increased nitrogen intake than those with the AA genotype. In conclusion, the GDF9 genotype influences the nutrient digestibility in Kacang goats, and those with the AC genotype utilize feed nutrients more efficiently than those with the AA genotype. The AC genotype resulting from the GDF9 gene mutation at position g.3855A>C can be used for genomic marker selection of high-quality Kacang goats in nutrient digestibility.
Co-Authors Bintara, S. Hartatik , T. Irawan, A. Kustantinah M. Taspika, M. Siti Nur Aisyah Wijaya, O.