Judul: Studi Faktor-Faktor Penentu Keberhasilan Pelepasliaran Orangutan Suamtera (Pongo abelii Lesson, 1827) di Taman Nasional Bukit Tiga Puluh, Propinsi Riau dan Jambi
Abstrak: The population of Sumatran Orangutan (P. abeii) nowadays in nature keep decreasing as the impacts of gross land destruction because of human's needs to land area and woods in high level. This condition become more serious when human's wants to make Orangutan (P.abeii)become endangered in its native habitat. Protection and rehabilitation methods that was done could not avoid or prevent speed of extinction of this animal in nature. Reintroduction is the modern rehabilitation activity by releasing some indicidues to the wildlife or by preparing siezumed animals become feral to conservation forest area as a new habitat where the species is not present at the moment. This study was done in august to December 2006 at Station of Sumatran Orangutan Reintroduction Centre in Buffer zone Bukit Tiga Puluh National Park, Kabupaten Tebo, Province of Jambi. The aim of this study was to measure the influence of determining factors to Orangutans reintroduction succesful to their native habitat and to identify other factors which give impact to reintroduction succesful. The results of this study are expected can give informations of succesful determination by using factors to Sumateran Orangutan reintroduction succesful in native habitat
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Judul: Studi reintroduksi orang utan Sumatera, Pongo pygmaeus abelii Lesson, 1827 yang dikembangkan di stasiun karantina Medan dan di Stasiun Reintroduksi Jambi
Abstrak: Orangutan merupakan salah satu primata yang kini paling terancam keberadaannya di dunia. Permasalahan yang dihadapi orangutan adalah perusakan terhadap habitatnya yang terbatas dan tingginya perburuan orangutan di habitat alaminya. Untuk mengatasi kepunahan orangutan maka saat ini dikembangkan suatu bentuk konsep penyelamatan yang disebut reintroduksi. Konsep reintroduksi ini merupakan suatu rancangan yang baru dikembangkan dalam rangka upaya penyelamatan orangutan dari kepunahan. Sehingga perlu diketahui bagaimana tingkat keberhasilan dari reintroduksi ini yaitu dengan melakukan proses pemantauan terhadap orangutan yang sudah diliarkan. Tujuan penelitian ini ialah untuk mengetahui tahapan kegiatan reintroduksi orangutan sumatera dan untuk mengetahui kegiatan pemantauan dan penilaian pasca reintroduksi dalam rangka mengetahui tingkat keberhasilan reintroduksi orangutan sumatera dan sekaligus mempelajari kriteria dalam penentuan tingkat keberhasilan reintroduksi. Penelitian ini diharapkan dapat memberikan informasi mengenai tahapan pelaksanaan reintroduksi satwa khususnya orangutan sumatera ke habitat alaminya. Penelitian dilakukan pada bulan Juli 2004 sampai Maret 2005 di dua lokasi yaitu di Stasiun Karantina Orangutan Sumatera yang terletak di Medan dan di Stasiun Reintroduksi yang terletak di Jambi. Metode yang digunakan untuk mengumpulkan data primer dan sekunder yaitu dengan observasi lapang, studi literatur dan wawancara langsung dengan pihak pengelola.
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Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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