Judul: Kajian Morfologi Proses Persembuhan Kerusakan Segmental Pada Tulang Domba Yang Diimplan Dengan Komposit Hidroksiapatit-Trikalsium Fosfat (HA-TKF)
Abstrak: This study was aimed to evaluate in vivo osteogenesis potency of bones implanted with graft of hydroxyapatite-tricalcium phosphate (HA-TCP) composite. This study also observed the potential use of HA-TCP as bone substitution material. Three local sheeps were used in this study. The implant was inserted under aseptic surgery on the proximal medial of the left tibia bone and as control the proximal medial of the right tibia bone was drilled without implant. Bones were harvested after 30, 60, and 90 days post-surgery and observed macroscopic and microscopically. The parameters of observation were the condition, shape and degradation degree of the implant, bonding between implant and host bone, new bone growth into the implant and signs of inflammation reaction around the implant. The result showed that the healing process on control bone was faster than those of the implanted bone. The bone implant had been already degradated in treated group of day 30 post-surgery. HA-TCP bone implant shown some signs for its biocompatibility, biodegradability, bioresorbability and osteoconductivity properties. Therefore, it is suggested that HA-TCP implant might be used as bone substitution in the bone lesions with approximately 30 days of recovery.
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Judul: Kajian Morfologi Penggunaan Bahan Biomaterial Hidroksiapatit: β-Trikalsium Fosfat pada Kerusakan Segmental Tulang Kelinci
Abstrak: This study was conducted to examine the healing process of rabbit’s bone implanted with mixture of hydroxyapatite-tricalcium phosphate (HA:β-TCP) with mixture ratio of 70:30 and 60:40. Six New Zealand white rabbits were used in this study. Hydroxyapatite β-tricalcium phospate implanted in the medial part of the right tibia using surgical procedures, while the same part of the left tibia served as controls without implants. The samples of tibia were taken on 30 days after implantation. Parameters observed were the shape, the degradation rate of the implant, the implant bonds with the bone, new bone growth into the implant, and the signs of inflammatory reaction around the implant. The results of this study showed that the healing process in control samples was faster than bone treated with implant. There was no macroscopically morphological difference observed between the bones implanted with mixture of 70:30 and those with 60:40. But, there was difference observed microscopically. Osteocytes was observed in the bones implanted with mixture of 60:40 and there was no osteocytes observed in the bones implanted with mixture of 70:30. At day 30, the implant of HA:β-TCP showed potency of biodegradability, bioresorbability, osteoconductivity, and good biocompatibility for body. It is suggested that the next research of this mixture as bone implant is still needed to find the optimal composition
Keyword: Bogor Agricultural University (IPB), rabbit bone, hydroxyapatite, healing process, bone implants, beta-tricalcium phosphate

Judul: Karakteristik massa air arlindo di Perairan Timur Indonesia pada musim timur
Abstrak: Sirkulasi massa air di perairan timur Indonesia yang dikenal secara internasional dengan istilah Indonesian Throughflow (Bray et al., 1996) atau Arus Lintas Indonesia (Arlindo) dalam Bahasa Indonesia (Ilahude dan Gordon, 1996) sangat menarik untuk diteliti. Penelitian ini bertujuan untuk menganalisis massa air Arlindo di perairan timur Indonesia pada musim timur, yang meliputi analisis jalur lintasan Arlindo dan karakteristik massa air yang terlibat di dalamnya. Karakteristik massa air di Samudera Hindia dan di wilayah ekuator bagian barat Samudera Pasifik dianalisis juga sebagai bahan perbandingan. Kegiatan penelitian adalah berupa pengolahan data sekunder yang diperoleh dari the National Oceanographic Data Center (NODC), NOAA, Amerika Serikat. Lintasan Arlindo dianalisis berdasarkan gambar kontur sebaran anomali kedalaman dinamik di lapisan permukaan 0 dbar relatif terhadap permukaan 1000 dbar. Karakteristik massa air dianalisis berdasarkan ciri-ciri core layer (King, 1963) yang terlihat dalam grafik suhu-salinitas (S-S) dan grafik suhu-oksigen (S-O₂). Sebaran nilai anomali kedalaman dinamik di lapisan permukaan 0 dbar relatif terhadap permukaan 1000 dbar menunjukkan nilai yang cukup tinggi di Laut Cina, Laut Sulu, Laut Sulawesi, dan sebagian Samudera Pasifik, yaitu antara 1,8 dyn m sampai 1,9 dyn m. Di sebelah timur Mindanao nilainya lebih kecil (1,5 dyn m sampai 1,7 dyn m), sedang di sebagian Laut Sulu nilainya lebih besar (2,0 dyn m sampai 2,1 dyn m).
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