Judul: Pemanfaatan Biomassa Tanaman Pisang Sebagai Elektrode Superkapasitor
Abstrak: Utilization of banana plant biomass as supercapacitor electrodes will give additional value to the waste. In this study, the banana peel contained the highest fixed carbon as compared with the midrib, stem, and leaves. The banana peel was charred at 400 oC and then activated at 700 °C with steam flow for 20 minutes. The active charcoal obtained (0.5 g) was modified by adding 2.65 mL of 40% HNO3. The results showed that the addition of 40% HNO3 reduce the pore structure and add C=O functional group in the activated charcoal which were both affected the capacitance value obtained. The capacitance of modified activated charcoal (270 F/g) was lower than that of the unmodified activated charcoal (341 F/g), in contrary to the hypothesis proposed. Based on this study, the 1:1 (b/b) mass ratio of polivynilidene fluoride conductor and the active ingredient is predicted to affect the capacitance.
Keyword: Bogor Agricultural University (IPB), polyvinylidene fluoride., modified activated charcoal, capacitance, activated charcoal

Judul: Pembuatan karbon aktif dari strobilus pinus (Pinus merkusii) sebagai elektroda superkapasitor
Abstrak: Superkapasitor merupakan salah satu perangkat penyimpanan yang saat ini banyak diteliti karena memiliki keunggulan jika dibandingkan dengan kapasitor konvensiaonal. Pada penelitian ini dibuat superkapasitor dengan menggunakan elektroda yang terbuat dari karbon aktif, yang memanfaatkan strobilus pinus atau lebih dikenal dengan bunga pinus. Strobilus pinus terlebih dahulu dikarbonisasi dan diaktifasi secara kimia dan fisika. Dengan variasi KOH (1 N, 3 N, 5 N) yang dilakukan untuk memperlihatkan perubahan dari karakteristik karbon aktif. Selanjutnya karbon aktif yang telah dibuat diukur resistansinya dengan menggunakan LCR, untuk selanjutnya dikarakterisasi dengan XRD untuk melihat perubahan struktur kristal yang terjadi. Selanjutnya karbon aktif dibentuk menjadi elektroda dengan mencampurkan Poly (vinylidene fluoride) polytetra dan 1-methyl-2-pyrrolidone, yang kemudian diletakan diatas stainles steel. Selanjutnya dilakukan pengukuran besarnya nilai kapasitansi elektroda yang didapat dengan menggunakan potensiostat. Besarnya kapasitansi yang didapat adalah sebesar 0.118 F∙g-1 pada elektroda dengan variasi KOH 3 N yang diukur pada laju 10 mV∙s
Keyword: Electrodes, activated carbon, supercapacitors, strobilus pine

Judul: Posisi Filogenetik Kura-Kura Carettochelys Insculpta  (Reptillia: Testudinata)
Abstrak: Carettochelys insculpta is an endemic freshwater turtle of southern Papua and northern Australia. Phylogenetic position of this turtle is remain unresolved until now. Most of the research conducted show close relationships of C. insculpta and members of Trionychidae family. However, some of the research show distance between C. insculpta and members of Trionychidae family. This research is conducted to analyze phylogenetic relationship between C. insculpta and other members of Testudinata using 12S rRNA, 16S rRNA, and both gene as markers. DNA samples were obtained from three different organisms of C. insculpta. Two species used as outgroups were Alligator mississippiensis and Iguana iguana. Phylogenetic analysis was carried out using Neighbor-Joining method with Felsenstein 1981 (F81) modeltest. A polytomy tree of Testudinata was produced by using 12S rRNA gene. However, analysis using 16S rRNA and both genes as markers confirmed that C. insculpta was located between the Chelonidae and the Trionychidae family.
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