Judul: Perubahan Karakteristik Kimia Tanah pada Model Reklamasi Lahan Bekas Tambang PT. Antam UBPE Pongkor
Abstrak: High mining activity in the forested land had damaged the forest, that reclamation is necessary to restore the forest conditions as before. This research aims at finding out changes on soil chemistry, and the concentration of Pb and Fe in the soil, and the 10 years old planted rosewood, pine, and walnut trees at the reclamation ex-gold mining land as a model of PT. Antam UBPE Pongkor. Soil analysis at 0–5 cm, 5–15 cm and 15–30 cm depth showed increase soil quality, especially in C-organic content at 0–5 cm, which is much higher than the deeper depth. C-organic content of rosewood stand was 2.08%, pine was 1.04% and walnut was 0.95%. The 10 years old planted trees had absorbed Pb and Fe, of which the highest Pb content was found in walnut roots at 13 ppm, while the highest Fe content was in pine roots at 4933 ppm
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Judul: Perbedaan Karakteristik Tanah pada Lahan Reklamasi PascaTambang dengan Tanah Asli tanpa Top Soil (Studi Kasus di PT.INCO Sorowako, Sulawesi Selatan)
Abstrak: Generally, nickel mining was conducted by open pit mining method. This method caused the change of soil physical, chemical and biological properties. For instance, those change are lost of nutrient and organic matter, soil compaction, pollution, change of soil layer, erotion, sedimentation, and the population decrease of soil microorganism. The effect of the top soil lost is the plant cannot grow normally, so that soil is not productive. Therefore, the research was aimed to know the soil characteristic differences (soil physical, chemical and biological) between reclaimed post mining land and natural soil without top soil. That are survey method is used to taking soil sampling for chemical and biological randomly and composite. Soil sampling for chemical properties was taken from 0-10 cm, 10-20 cm, 20-30 cm, 30-40 cm, 40-50 cm and 50-60 cm depth, and soil sampling for biological properties was taken in 0-10 cm depth. However, sampling for soil physic properties was done in certain points of each location used ring sample in 0-30 cm and 30-60 cm depth. Soil sampling for physical, chemical and biological properties was conducted in post mining PT. INCO Sorowako area, South Sulawesi. This soil sample was taken in 2 locations, which are Reclaimed Post Mining (Harapan) and location not yet mined but the top soil was disected until ±1 meter depth (Shelly). The results of this study showed that based on physical and biological properties of soil in Shelly was better than Harapan. Based on physical properties in Shelly of 0-30 cm depth. The bulk density in Shelly was lower and porosity was higher than in Harapan. Biological properties of 0-10 cm depth showed the total fungi, total of soil microorganism, respiration of soil microorganism and C- mic of Shelly was higher than Harapan. The chemical properties of 0-10 cm depth (C-organic, N-total and CEC) in Harapan was very low, on the other hand in Shelly low. Harapan and Shelly had low P-available and Na-dd, very low Ca-dd, high Mg-dd and very high micro nutrient content except enough for Zn, K-dd content in Harapan medium and Shelly was low. Harapan had very high BS with pH 6.7, and BS in Shelly had high with pH 5.8.
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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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