Judul: Membran Polistirena Tersulfonasi untuk Aplikasi pada Microbial Fuel Cell
Abstrak: Microbial fuel cell (MFC) is a major type of bielectrochemical system that converts biomass spontaneously into electricity through the activity of microorganisms. The sulfonated polystyrene (PSS) membrane can be used as a proton exchange membrane (PEM) in application on MFC. PEM has been characterized on PSS using fourier transform infrared spectrophotometer (FTIR), scanning electron microscope (SEM), and degree of sulfonation (DS) parameter, and conductivity value. The result of FTIR analysis in 10% PSS membranes showed sulfonate group (SO3) absorption at wavenumber 1029.39 and 1178.03 cm-1. PSS membrane surface morphology based on SEM is categorized non-porous. The success of the sulfonated process indicated by the DS of the membranes of sulfonated PSS 3%, 5%, and 10% were 35.09%, 42.27%, and 48.15%, respectively. The result of the conductivity (σ) value obtained by PS, PSS 3%, PSS 5%, and PSS 10% were 1.1455×10-8, 1.5511×10-6, 3.0919×10-6, and 3.8949×10-6 S.cm-1, respectively. MFC performance showed the presence of microbe in cow’s rumen liquid with total plate count. The membranes of PSS 3%, 5%, and 10% can produce different potential of 9, 10, and 14 mV respectively, meaning that the PSS membrane can be applied as a MFC
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Judul: Sintesis dan Karakterisasi Membran Penukar Proton Polistirena Tersulfonasi sebagai Bahan Perangkat Direct Methanol Fuel Cell
Abstrak: Sulfonated polystyrene can be used as proton exchange membrane (PEM). Characterization and performance of PEM has been performed on sulfonated polystyrene (PSS) using fourier transform infrared spectrophotometer, scanning electrone microscope, and degree of sulfonation (DS) parameter. The success of the process indicated by the DS of the membrane PSS 3%, 5%, and 10% were 35.09%; 42,26%; and 48.15%, respectively. The infrared spectrum shows that sulfonation has been succesful in 10% PSS membranes as indicated by the presence of sulfonate groups (-SO3) at wavenumber 1029.39 and 1178.03 cm-1. PSS membrane surface morphology is categorized non-porouse. Methanol permeability with qualitative test showed that the membrane PSS 3%, 5%, and 10% have no infiltration. The results of measurements of the conductivity (σ) obtained by PS, PSS 3%, PSS 5%, and PSS 10% were (0.0114; 1.5511; 3.0919; and 3.8949) × 10-6 S/cm, respectively. So that the membrane PSS 3%, 5%, and 10% can be used as a device in direct methanol fuel cell.
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Judul: Keanekaragaman Spesies Burung Pada Beberapa Ketinggian Di Resort Gunung Putri Taman Nasional Gunung Gede Pangrango
Abstrak: Keanekaragaman Spesies Burung Dipengaruhi Oleh Beberapa Faktor Seperti Ketinggian Tempat, Vegetasi Dan Suhu. Tujuan Penelitian Ini Untuk Membandingkan Keanekaragaman Di Berbagai Ketinggian Tempat Dan Mengidentifikasi Kelompok Burung Campuran. Penelitian Dilakukan Pada Ketinggian 1600, 1800, 2000, 2200 Dan 2400 Mdpl Di Resort Gunung Putri, Taman Nasional Gunung Gede Pangrango. Suhu Dan Kelembaban Diukur Dengan Termometer Bola Basah-Bola Kering. Data Vegetasi Diambil Dengan Metode Jalur Berpetak. Data Burung Dikumpulkan Dengan Metode Titik Hitung Dan Look And See. Jumlah Spesies Dan Indeks Keanekaragaman Burung (H’) Mengalami Penurunan Mulai Pada Ketinggian 2000 Mdpl. Nilai Indeks Keanekaragaman Tertinggi Ada Pada Ketinggian 2000 Mdpl (H’=2,40). Kelompok Campuran Yang Teridentifikasi Sebanyak 5 Kelompok Di Ketinggian 2000-2400 Mdpl. Srigunting Kelabu (Dicrurus Leucapheus) Dan Srigunting Bukit (Dicrurus Remifer) Merupakan Pemimpin (Nuclear) Dalam Kelompok Dan Munguk Loreng (Sitta Azurea) Dan Kacamata Gunung (Zosterops Montanus) Merupakan Spesies Yang Paling Banyak Dijumpai.
Keyword: Gunung Putri, Keanekaragaman, Ketinggian Tempat, Spesies Burung