Judul: Optimasi Suhu dan Tekanan Kempa pada Pembuatan Papan Partikel dari Bungkil Jarak Kepyar (Ricinus communis L)
Abstrak: Castor cake meal contains 48.07% of protein and 12.28% of fiber. The high protein and fiber contents are potential to be used as particleboard raw material. This research aimed to determine the effect of pressing temperature and pressure on physical and mechanical properties of particleboard, and to obtain the optimum temperature and pressure in production of particleboard from pressing castor cake meal. This research designed by using Central Composite Design (CCD), data were analyzed by ANOVA (α = 0.05) and Response Surface Method (RSM). Temperature of 180 oC and pressure of 200 kgf/cm2 produced the best particleboard with MOR of 24.17 kgf/cm2, MOE of 2 658.56 kgf/cm2, thickness swelling of 13.33%, water absorption of 78.18% and moisture content of 5.85%. Temperature effected all tested responses, whereas pressing pressure effected only the moisture content and the water absorption of particleboard. The optimum pressing temperature and pressure based on regression model of MOR in production of particleboard from castor cake meal were 180 °C and 186 kgf/cm2.
Keyword: pressure., temperature, optimization, particleboard, castor cake meal

Judul: Pemanfaatan Ampas Biji Jarak Pagar (Jatropha curcas L.) Hasil Samping Pengepresan Minyak Sebagai Bahan Baku Pembuatan Papan Partikel
Abstrak: Jatropha press cake (Jatropha curcas L) has high crude fiber which is potential to be utilized as raw material for particle board production. This study aims to assess the physical and mechanical properties of jatropha press cake particle board and effect of addition of paraffin and sago starch to improve the quality of particle board. The parafin were added at 0, 1, 3%, and the sago starch were at 6, 8, and 10%, respectively. The physical and mechanical properties of particle board product were evaluated. The density of particle board ranged at 0,84 - 0,95 g/cm3, moisture content 4,56 - 6,19%, the thickness-swelling for 2 and 24 hours water soaking were 11,6 7- 20,12% and 16,22-25,70%, respectively. The water absorption of particle board for 2 and 24 hours water soaking were 48,74-62,20% and 63,10-72,75%. The Modulus of Rufture (MoR) and Modulus of Elasticity (MoE) of particleboard were 19,70 - 97,44 kgf/cm2 and 1552,26-7234,66 kgf/cm2. The addition of paraffin and sago starch have positive effect for physical and mechanical properties of particle board. The particle board with addition of 3% paraffin and 10% sago starch achieves to pass of MoR that accordance with JIS A 5908:2003 standard.
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Judul: Karakteristik Anatomi Skelet Kepala Buaya senyulong (Tomistoma schlegelii).
Abstrak: Buaya sepit atau senyulong (Tomistoma schlegelii) merupakan jenis buaya asli Indonesia yang berhabitat di sungai-sungai Sumatera, Kalimantan, dan juga pedalaman Sulawesi. Salah satu ciri khas buaya senyulong adalah bentuk moncong yang runcing dan sempit, namun hingga saat ini informasi mengenai struktur skelet kepala buaya senyulong sangat terbatas. Penelitian ini bertujuan untuk mempelajari karakteristik anatomi skelet kepala buaya senyulong yang dikatikan dengan fungsi dan perilakunya. Penelitian dilakukan secara eksploratif dengan melakukan pengamatan, pencatatan, dan pengambilan gambar dari skelet kepala buaya senyulong. Skelet kepala berukuran panjang 70 cm, lebar 29 cm, dan tingggi 17 cm dengan permukaan kasar pada os nasale, os frontale, os maxilla, os mandibula, os lacrimale, os jugale. Jumlah gigi pada buaya ini sebanyak 78 buah, terdiri dari 4 buah gigi premaxila, 16 buah gigi maxila, dan 19 buah gigi mandibula. Pada regio orbitalis ditemukan dua pasang fenestrae temporales yang berkembang baik. Fenestra supratemporale merupakan lubang oval yang membentang di sepanjang os parietale. Fenestra infratemporale berbentuk segitiga dan dibatasi oleh os squamosum, os postorbitale, os jugulare, dan os quadratum. Os mandibula hewan ini mempunyai symphysis mandibularis yang panjang yaitu garis yang melintang di corpus mandibulae. Secara fungsional ukuran symphysis mandibularis berkaitan dengan adaptasi hewan terhadap diet makan.
Keyword: kepala, moncong, Tomistoma schlegelii