Judul: Dinamika leukosit pada persembuhan tulang dengan implantasi kombinasi bifasik kalsium fosfat
Abstrak: This study was conducted to evaluate the leucocyte dynamics in rabbits which were implanted by biphasic calcium phosphate (BCP) bone graft in the tibia bones. The bone graft was made by combination of 70% hydroxyapatite (HA) : 30% β-tricalcium phosphate (β-TCP), herein after reffered as BCP 1, and 60% HA : 40% β-TCP (BCP 2). Twelve rabbits were used in this experiment and divided into two groups. The first group was implanted with BCP 1 and the second group was implanted with BCP 2. Blood samples were collected from auricularis veins and sampled at pre-surgery (H0) and 7, 30 and 60 days post-surgery. According to the Complete Blood Count (CBC) test, the differential leucocyte dynamics in both treatment groups were in the normal range. Differential leucocyte profile showed that the implant was not rejected by the body and did not cause any excessive inflammatory reaction.
Keyword: β-tricalcium phosphate, hydroxyapatite, differential leucocyte, bone graft, Bogor Agricultural University (IPB)

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: Peranan Sektor Industri  Terhadap Pembangunan Wilayah di Kota Madya Medan Propinsi Sumatera Utara
Abstrak: Kotamadya Medan sebagai pusat pertumbuhan ekonomi di Sumatera Utara daiam pengembangan perekonomiannya dipengaruhi oleh potensi yang dimiiiki terutama potensi dari sudut letaknya yang strategis bagi lalu lintas perdagangan , sehingga sangat mendukung bagi pertumbuhan barbagai jenis industri terutama yang berorientasi ekspor .
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