Judul: The Isolation of Silver (Ag) from Fixer Sludge with Electrolysis methode
Abstrak: with the variations concentration, electrode of carbon, and voltages. The aim of research are looking for the easiest and eficient electrolysis. Among of 272.79 ppm of silver (impurities) could be produced from electrolysis fixer which used 300 times maintain the film. For 400, 500, and 600 times electrolysis were produced recently 49.42, 137.04, and 55.22 ppm. Futhermore, it was increased to 220.00 ppm from 700 times. These were possible because of density the solutions. From the electrode of carbon, 68.2222 g Ag (impurities) could be processed from size 14 cm x 3 cm x 3 cm. The next results 41.2050 g and 43.7559 g from the sizes 16 cm x 3 cm x 3 cm and 18 cm x 3 cm x 3 cm. The reasoned of this part any faster reaction on the most litle electrode. By the way, from voltages variation, the processed showed that 47.4575 g of Ag (impurities) could be produced from 11 volt. It’s caused the bigest voltages are also the bigest kinetics power on the reactions. Sampel and product were analized by AAS. Consentration has potential to be indicator, because of the used 700 times was given trend high Ag (impurities) became increase optimally at 11 volt, and much sediment that is 47.4575 g. The best rendemen is 13.33%. The other finding is that the strength of the time and the voltages strongly enfluence the electrolysis shown by the bigger result on F(calculation) than that of the F(table).
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Judul: Pengolahan Limbah Cair Laboratorium dengan Proses Elektrokoagulasi
Abstrak: Liquid Laboratory waste contains dissolved heavy metals, such as mercury (Hg), silver (Ag), and chromium (Cr) in high concentrations and have potential to pollute the environment. The waste produced in small quantities, but the waste are toxic and until now there is no adequate treatment. Electrocoagulation is a liquid waste processing technique by agglomerate and precipitate fine particles in water using electrical energy. The purpose of this research was to determine of variations in power supply voltage and the contact time to find out the best combination of electrocoagulation process regarding the removal efficiency of the pollutants. Liquid waste as much as 500 mL was treated in batch mode using iron electrode. Samples were given a voltage of 6, 9, and 12 V for 1, 2, 3, and 4 hours. The best combination based on the reduction of color, turbidity, and TSS was 12 volts with a contact time of 2 hours. Total cost for the treatment was 85.74 rupiahs per L.
Keyword: Bogor Agricultural University, COD waste, electrocoagulation, iron electrode, laboratory waste

Judul: Karakteristik Anatomi Skelet Tubuh Badak Jawa (Rhinoceros Sondaicus).
Abstrak: Badak jawa (Rhinoceros sondaicus) merupakan spesies mamalia besar di dunia yang paling terancam punah dan hanya dapat ditemukan di Taman Nasional Ujung Kulon (TNUK), Provinsi Banten, Indonesia. Tujuan dari penelitian ini adalah mempelajari karakteristik spesifik anatomi skelet tubuh badak jawa. Struktur skelet ini dikaitkan dengan fungsinya untuk menunjang ukuran tubuh yang besar dan perilakunya. Penelitian ini menggunakan satu set preparat skelet tubuh badak jawa. Parameter penelitian yang dilakukan adalah mengamati bentuk bagian skelet yang khas, mengukur panjang dan lebar tulang, serta dibandingkan dengan skelet tubuh badak sumatra dan hewan piara lain. Kemudian, sistem penamaan pada setiap bagian tulang dilakukan berdasarkan Nomina Anatomica Veterinaria (ICVGAN 2012). Karakteristik anatomi skelet tubuh badak jawa relatif mirip pada badak sumatera, tetapi memiliki ukuran yang lebih besar. Terdapat beberapa perbedaan yang ditemukan yaitu, ala atlantis lebih panjang, processus spinosus os axis berbentuk segiempat, processus transversus et spinosus tulang leher lebih subur, processus spinosus os vertebrae thoracicae relatif lebih mengarah ke kaudodorsal terutama pada sembilan ossa vertebrae thoracicae di kranial, daerah flank lebih sempit, dan ossa sacrales yang tersusun lebih kompak dan rigid. Secara umum skelet tubuh badak jawa memiliki hubungan yang sangat erat, kokoh, dan kompak, disertai penjuluran-penjuluran dan aspek kasar sebagai tempat melekatnya otot-otot dan ligamenta dengan kuat. Hal ini berperan dalam mempertahankan rigiditas dan menjaga sikap tubuh badak jawa terkait dengan habitat dan perilakunya.
Keyword: anatomi, badak jawa, skelet tubuh