Judul: Adsorptivitas arang aktif kayu meranti merah (Shorea sp.) terhadap fenol
Abstrak: Serbuk maupun serpihan kayu sisa hasil pengolahan kayu telah banyak dimanfaatkan sebagai adsorben. Penelitian ini memanfaatkan kayu meranti merah sebagai adsorben dalam menjerap limbah fenol. Proses aktivasi dilakukan dengan kombinasi metode fisis dan kimia. Kondisi terbaik diperoleh dengan NaOH 0.75% dan pengaliran uap air selama 50 menit. Kapasitas adsorpsinya 7.7−23.6 g/g dengan efisiensi adsorpsi 89−92%. Mekanisme adsorpsi mengikuti isoterm Freundlich dengan linearitas 99.24%. Kualitas arang aktif tersebut juga telah memenuhi persyaratan dalam Standar Nasional Indonesia 06-3730-1995 dan lebih baik dibandingkan dengan arang aktif komersial.
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, Meranti merah, Arang aktif, Fenol, Sdsorpsi, Limbah, Kapasitas adsorpsi

Judul: Pembuatan, pencirian, dan uji daya adsorpsi arang aktif dari kayu meranti merah (Shorea Sp.)
Abstrak: Wood of red meranti (Shorea sp.) is utilized widely as furniture and construction material and produces plenty of wood waste. In this research, the wood waste was used as activated charcoal raw material to improve its utility. The activated charcoal produced was tested as absorbent in industrial chromium and manganese metal waste processing. Carbon activation was relied on 3 factors, namely activator chemicals, water vapour steam, and activation time. As the quality indicators of activated carbon Indonesian National Standard (SNI 06- 3730-1995) was used. The specific surface area and structure pattern of activated carbon were also determined. Commercial activated carbon was also studied as reference. The results showed that the best activated carbon based on iodine adsorption activity and SNI’s standard quality was carbon activated with water vapour steam for 90 minutes without activator chemicals (HCl 5%). The best activated carbon was capable to reduce chromium and manganese concentration up to 58.11 and 5.85%, respectively. The adsorption mechanism followed Freundlich isotherm, and the dosage obtained from the isotherm equation could reduce 99.99% of chromium concentration from industrial waste.
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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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