Judul: Pengaruh penambahan garam anorganik, pelarut alkohol, dan alkali terhadap formula " Surfaktan MES - Air Formasi - Minyak" (studi kasus Lapangan Sandstone)
Abstrak: The application of methyl ester sulfonate (MES) surfactant for enhance oil recovery (EOR) was due to its ability to reduce interfacial tension in crude oil-water system that reaches 10-3 dyne/cm. Performance of methyl ester sulfonate (MES) surfactant can be identified with the spinning drop IFT method and phase behavior method. The objectives of this research were to determine of MES surfactant performance with addition of inorganic salt, alcohol, and alkaly in different conditions. The dispersing media used in this research is the formation water and demineralized water. The spinning drop IFT method was conducted using spinning drop tensiometer TX500C tested in 40, 50 and 60 oC. The researched showed that reduction of IFT value was affected by surfactant, inorganic salt, solvent alcohol, and alkali in the formation water and demineralized water dispersion medium. The phase behavior method was conducted using test tube method performance at 50 oC. The best result of phase behavior methode was found in formation water dispersion medium with the 0,3% of methyl esteer sulfonat (MES) addition.
Keyword: Bogor Agricultural University (IPB), phase behavior, methyl ester sulfonate (MES), interfacial tension (IFT), inorganic salt, alcohol, Alkali

Judul: Pengaruh penambahan garam anorganik, pelarut alkohol, dan alkali terhadap formula " Surfaktan MES - Air Formasi - Minyak" (studi kasus Lapangan Sandstone)
Abstrak: The application of methyl ester sulfonate (MES) surfactant for enhance oil recovery (EOR) was due to its ability to reduce interfacial tension in crude oil-water system that reaches 10-3 dyne/cm. Performance of methyl ester sulfonate (MES) surfactant can be identified with the spinning drop IFT method and phase behavior method. The objectives of this research were to determine of MES surfactant performance with addition of inorganic salt, alcohol, and alkaly in different conditions. The dispersing media used in this research is the formation water and demineralized water. The spinning drop IFT method was conducted using spinning drop tensiometer TX500C tested in 40, 50 and 60 oC. The researched showed that reduction of IFT value was affected by surfactant, inorganic salt, solvent alcohol, and alkali in the formation water and demineralized water dispersion medium. The phase behavior method was conducted using test tube method performance at 50 oC. The best result of phase behavior methode was found in formation water dispersion medium with the 0,3% of methyl esteer sulfonat (MES) addition.
Keyword: Bogor Agricultural University (IPB), phase behavior, methyl ester sulfonate (MES), interfacial tension (IFT), inorganic salt, Alkali, alcohol

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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