Judul: Adsorptivitas berbagai perlakuan bentonit terhadap heksaklorobenzena
Abstrak: In this research adsorptivity of bentonite against organochlorine compounds, namely hexachlorobenzene, was studied. Various treatments were given to the bentonite before being used as adsorbent. The treatments to the bentonite were acid and heating. The treatment that provide the best adsorption capacity and efficiency was given by heating treatment at 600 °C and followed by acid treatment of 30% H2SO4. The optimum adsorption time was obtained at 6 hours with the weight of adsorbent 0.5 g. The study of the adsorption isotherm model showed that the adsorption hexachlorobenzene using bentonite adsorbent followed the Freundlich isotherm. Adsorption of hexachlorobenzene using bentonite showed better capacity and efficiency of adsorption than using commercial activated carbon.
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Judul: Adsorptivitas kaolin dan bentonit teraktivasi terhadap heksakloroetana
Abstrak: MAIRED SAFDI DARMA. Activated Kaolinite and Bentonite Adsorptivities for Hexachloroethane. Supervised by KOMAR SUTRIAH and HENNY PURWANINGSIH. Kaolinite and bentonite can be used as adsorbent for pesticides, such as hexachloroethane (HCE). Kaolinite is a mass of clay materials with low content of irons. The chemical composition of kaolinite is hydrous aluminum silicate (2H2O·Al2O3·2SiO2). Bentonite contains 85% montmorillonite with the chemical composition of Al2O3·4SiO2·xH2O. This research was aimed to determine the adsorptivity of activated bentonite and kaolinite absorptivity toward HCE. Kaolinite and bentonite was activated using 30% sulfuric acid in 90 minutes. The result showed that optimum adsorption time for kaolinite and bentonite was 6 and 4 hours, respectively. Kaolinite was better in HCE adsorption with adsorption capacity of 8680.07 mg/g and efficiency value of 89.51% as compared to those of bentonite that was 8662.71 mg/g and efficiency value of 90.61%. Based on this research, HCE adsorption onto kaolinite and bentonite followed Freundlich isotherms.
Keyword: Kaolinite and bentonite, Bentonite andsorption, Freundlich isotherms, Bogor Agricultural University, Institut Pertanian Bogor, IPB

Judul: Beberapa aspek anatomi alat sirkulasi ruang dada kancil
Abstrak: Telah dilakukan penelitian dengan menggunakan 10 ekor kancil dewasa jantan dan betina dengan tujuan untuk menge- tahui beberapa aspek anatomi alat sirkulasi di dalam ruang dada, meliputi jantung, pembuluh darah yang keluar dan ma- suk jantung serta ukuran-ukuran jantung. Kancil merupakan ruminansia terkecil di dunia, hidup di daerah tropika India, Thailand, Malaysia dan Indonesia bagian barat. Hewan ini dilindungi dan mempunyai prospek yang baik untuk hewan penelitian maupun dibudidayakan. Hasil penelitian menunjukkan bahwa berat jantung rаta-rata adalah 0.69% dari berat rata-rata kancil. Dan ini mirip pada jantung kuda dan anjing. Bentuk jantung lonjong seperti halnya ruminansia. Demikian pula letaknya di dalam ruang dada seperti pada ruminansia dengan adanya Ligamentum sternopericardiacum. Di dalam ventrikel kanan membersit sebuah Musculus (M.) papillaris dari dindingnya dan tiga sampai empat Musculi (Mm.) papillares dari Septum interventriculare. Hanya dua buah Mm. papillares yang berukuran besar dibersitkan dari dinding ventrikel kiri. Percabangan Arteri (A.) coronaria sinistra lebih dominan dari pada A. coronaria dextra. Sedangkan A. sub clavia sinistra dicabangkan langsung dari aorta di dorso- caudal pembersitan Truncus (Tr.) brachiocephalicus…
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