Judul: Aplikasi otoinfus pada motor diesel terhadap peningkatan daya, The Effect of otoinfus application on power increase of diesel engine
Abstrak: Sumberdaya bahan bakar minyak di Indonesia semakin langka dan mahal. Hal ini disebabkan ketersediaan bahan bakar minyak yang semakin terbatas dan penggunaan yang semakin meningkat. Untuk mengatasi masalah tersebut, diperlukan berbagai upaya untuk mengefisienkan penggunaan bahan bakar minyak. Otoinfus adalah salah satu implemen yang dirancang khusus untuk mengefisienkan penggunaan bahan bakar minyak dalam proses pembakaran pada motor bakar, dengan cara meningkatkan daya dari motor bakar pada tingkat penggunaan bahan bakar tertentu. Penelitian aplikasi otoinfus untuk meningkatkan daya motor bakar dilakukan pada motor diesel Nissan SD16. Penelitian dilakukan dengan cara mengukur daya motor tanpa pemasangan otoinfus dan dibandingkan dengan daya motor setelah dipasang otoinfus. Hasil dari penelitian menunjukan bahwa pemasangan otoinfus meningkatkan torsi maksimum dari 94.74 Nm menjadi 97.28 Nm (2.85 %). Dengan pemasangan otoinfus, konsumsi bahan bakar spesifik motor bakar diesel cenderung lebih rendah daripada sebelum dipasang otoinfus. Penurunan SFC pada motor diesel ini sebesar 2.70%.
Keyword: power, fuel, otoinfus

Judul: Aplikasi dan Pengaruh “Otoinfus” terhadap Torsi dan Daya Motor Bensin
Abstrak: Agricultural activity never separate from utilizing power source, such as gasoline engine. The use of fuel especially gasoline continuously will drain its availability and in the end it will run out. “Otoinfus” could become an alternative by increasing combustion process so the torque and power of the engine will increase as well. The objective of this research was to compare amount of torque and power of the engine before and after supplied by water through “otoinfus”. Measurement was done by using prony brake, which is a tool for measuring horsepower, that equipped to Honda GX-160 gasoline engine. The results of measurement showed that there were some effects of the engine performance which proofed by raising of engine torque and power. Maximum of torque excalation was 1.74 Nm at 2000 RPM, and power excalation was 0.38 kW at 2100 RPM. At average, the engine torque and power increase 23% compared to that before using “otoinfus”
Keyword: Bogor Agricultural University (IPB), power, torque, prony brake, “otoinfus”, gasoline engine

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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