Judul: Biodegradasi Limbah Minyak Berat Menggunakan Isolat Tunggal dan Campuran dengan Tambahan Alkilbenzena Sulfonat Linear
Abstrak: Oil spill incident in petroleum industry is inevitability event that caused environmental pollution. Bioremediation is one of the safe methods to handle petroleum polluted environment using bacterial activity. Bacterial were isolated from polluted soil and nourishment by cow and horse manure. The degradation process was improved with linear alkyl benzene sulphonate. The best three isolated microbes and its combination were applied to degrade heavy oil waste combined with linear alkyl benzene sulphonate. The observation parameters were solid Total Petroleum Hydrocarbon (TPH), liquid TPH, Total Plate Count (TPC), Chemical Oxygen Demand (COD), and pH. MY7, MY12, and MYFlr were selected as the best three isolated microbes as shown by their highest percentage of degradation, namely 32.26, 58.25, and 40.74%. The addition of linear alkyl benzene sulphonate proved to augment oil solubility in water, as shown by decreasing solid TPH, increasing liquid TPH, and increasing COD. The value of solid TPH of the three isolate combination in day-21 were 2.33% (w/w), liquid TPH were 1.68% (w/v), and COD were 246456 mg/mL. The degradation level of the three isolate combinations in 21 day-21 was 81.56%. The bacterial combination showed higher degradation level of the waste as compared to that ot the single microbe.
Keyword: 

Judul: Perombakan Hidrokarbon Dalam Tanah Terkontaminasi Minyak Berat, Minyak Ringan dan Oli Bekas oleh Bacillus sp.
Abstrak: Oil is the main source of energy for humans activities such as industries and transportations. The oil exploration activities have potential to pollute the environment (i.e.soil, water, and air). The sludge released bysuch activities can be degraded by bacteria into non-harmful compounds. Biodegradation process is done to achieve the concentration of Total Petroleum Hydrocarbon (TPH) in the contaminated soil less than 1%. The result showed that the bacteria of Bacillus sp. ICBB 7859, ICBB 9461, ICBB 5071 were able to degrade the concentration of TPH of heavy oil from 9.5082% to 0.4673%, 10.7747% to 0.3607% and 9.2442% to 0.6713%, respectively. The three isolates of bacteria needed nine weeks to complete the process. For light oil, Bacillus sp. ICBB 7859 was able to decrease the TPH from 2.9407% to 0.4378%, ICBB 9461 from 3.1433% to 0.4702%, and ICBB 5071 from 3.0742% to 0.5991% respectively, within four weeks. For iv lubricant wastes, Bacillus sp. ICBB 7859 was able to decrease the TPH of lubricant wastes from 7.6949% to 0.9067, ICBB 9461 from 7.4556% to 0.9222%, and ICBB 5071 from 7.3459% to 0.6796% respectively. The three isolates of bacteria completed the degradation process in different time. Bacillus sp. ICBB 7859 and ICBB 9461 degraded lubricant wastes within six weeks, and Bacillus sp. ICBB 5071 degraded the lubricant wastes within five weeks to reach the TPH concentration of less than 1%.
Keyword: 

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…
Keyword: