Judul: Pengaruh Aplikasi “Oto Infus” Terhadap Konsumsi Bahan Bakar dan Emisi Gas Buang Motor Bensin
Abstrak: “Oto infus” adalah alat yang dapat meningkatkan efisiensi pembakaran. Alat ini merupakan karya dari Haryo dan Sutejo. Alat ini telah banyak digunakan pada berbagai jenis mesin antara lain mobil, motor, maupun generator listrik. Tujuan dari penelitian ini adalah menguji seberapa besar pengaruh dari penggunaan “oto infus” terhadap laju konsumsi bahan bakar serta emisi gas buang pada motor bakar bensin. Motor bakar yang digunakan adalah motor Honda GX-160 yang banyak digunakan sebagai sumber tenaga di bidang pertanian. Pengukuran konsumsi bahan bakar dilakukan dengan mengamati penurunan permukaan bahan bakar selama digunakan pada selang transparan. Pengukuran emisi gas buang dilakukan dengan menggunakan Ultra 4/5 gas analyzer Hanatech IM 2400. Penelitian menunjukkan “oto infus” dapat menghemat laju konsumsi bahan bakar hingga 20.46%. Emisi yang dihasilkan juga dapat diturunkan dengan penggunaan “oto infus”.
Keyword: “oto infus”, motor bensin, konsumsi bahan bakar, emisi gas buang.

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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