Judul: Pengujian Lentur Balok Laminasi-Mekanik Kayu Mahoni (Swietenia macrophylla King)
Abstrak: Laminated beam (LB) is a modified product made of two or more laminas bonded with adhesive or mechanical joints. This research aims to determine the mechanical properties and analyze the flexural characteristics of mechanicallaminated beam (MLB). The MLB's manufacturing is divided into several sections: wood drying, LB manufacturing, arranging, bonding, clamping, conditioning, jointing using nails or screws, and testing. Three types of laminated beam was prepared in this research, with addition of one glued laminated timber (Glulam). Type-1 beam used screws or nails along its length as the jointer of laminas. Nails or screws on type-2 beam was put on the one third length of the span, on both ends of the beam, and given adhesive on the one third span, in the middle of the beam. Nail or screw on the type-3 was put on the one-third span, the middle, and adhesives on the one-third span on both ends of the beam. The results show that type-3 LB has highest modulus of elasticity (MOE) value. The highest value of MOE on LB with 0.3 cm-nails is 52298.58 kg/cm2; moreover, the lowest MOE was achieved by type-1 LB with 0.3 cm-diameter nails: 11077.41 kg/cm2. The highest modulus of rupture (MOR) value was achieved by type-1 LB with 0.3 cm diameter-nails, while the lowest was obtained on the type-3 LB with 0.5 cm diameter-nails: 207.36 kg/cm2. Glulam has higher MOE and MOR values compared to all MLB. The positioning of screws, nails, and adhesives on LB has significant effect on MOE value. The damage on MLB was shown in form of flexural failure and delamination.
Keyword: Bogor Agricultural University (IPB), mechanical-laminated beam, mahogany wood, glulam beam, flexural testing

Judul: Karakteristik Balok Laminasi (Glulam) Kayu Ekaliptus (Eucalyptus urophylla ST. Blake)
Abstrak: The use of wood for structural purposes requires a large dimension and long span as well as specific requirements of high strength. On the other hand, a lot of wood available today is wood from plantations with fast growing species of small diameter and generally have inferior properties such as defects content, natural durability and strength compared to wood from natural forests. One common way to get the wood to the desired dimension is the lamination technique. One of the laminate product used as a structural material is laminated timber. The aim of the study was glulam composed by three laminas thickness from eucalyptus wood. Three laminas 1cm, 1.5cm, 2cm thickness, were prepared in this study. Each laminae was tested by non destructive evaluation of deflection method to determine Modulusof Elasticity (MOE). The highest MOE of laminae was placed at the outside of glulam, then between laminas were glued by isocyanate resin. The dimension of glulam was (8 x 6 x 110) cm in thick, width, and length. The physical and mechanical properties of glulam were evaluated refering to standard JAS 234:2003. The physical properties of glulam timber of moisture content was in average value of 13.37%. The density mean of glulam timber were 0,65g/cm³ to glulam A composed by 1cm thickness of laminae, 0,63g/cm³ to glulam B composed by 1.5cm thickness of laminae, 0,56g/cm³ to glulam C composed by 2cm thickness of laminae. Delamination properties of hot and cold water were 25.2% and 4.99% for glulam A, 45.9% and 8.03% for glulam B, 73.86% and 0% for glulam C. The average value of mechanical properties Modulus of Elasticity (MOE) were 10.06x10⁴ kgf/cm² for glulam A, 7.42x10⁴ kgf/cm² for glulam B, and 5.63x10⁴ kgf/cm² for glulam C. The Modulus of Rupture (MOR) of glulam beams were 561 kgf/cm², 424 kgf/cm², and 327 kgf/cm² for glulam A, glulam B, and glulam C, respectively. Average value of shear strength properties were 98.42 kg/cm² for glulam A, 90.23 kg/cm² for glulam B, 79.01 kg/cm² for glulam C. Moisture content and delamination on cold water glulam timber were in compliance with JAS standards 234: 2003 while the delamination on heat water not fullfill to meet the standards. The MOE and MOR values the glulam timber (except MOE laminated timber with a thickness of 1.5 cm and 2 cm) were in compliance with JAS standards 234: 2003.
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Judul: Warna bulu kucing ras Persia : variasi pola warna dan pewarisannya
Abstrak: Kucing Persia merupakan kucing ras yang paling umum dijumpai di Indonesia. Kucing Persia memiliki bulu yang panjang dengan variasi warna bulu yang sangat beragam. Perkawinan yang lebih terarah sangat perlu dilakukan untuk meningkatkan kualitas genetik warna dan pola warna bulu kucing. Penelitian ini bertujuan untuk mempelajari variasi warna dan pola warna bulu kucing Persia yang terdapat di Indonesia, yang dilakukan di kantor pusat Cat Fancy Indonesia mulai bulan Oktober 2000 sampai Januari 2001. Data yang digunakan merupakan data pedigree kucing Persia yang tercatat di Cat Fancy Indonesia dari tahun 1997 sampai Oktober 2001 yang terdiri dari 187 jantan dan 258 betina, selain itu juga dilakukan pengamatan langsung kepada tiga penyayang dan breeder kucing yang ada di Bandung. Secara umum tercatat 104 penyayang dan breeder kucing ras di Indonesia, 74,04% terdapat di Jawa Barat dan sisanya (25%) terdapat di daerah Jakarta. Jumlah kucing Persia yang lahir di Indonesia adalah 387 kucing (87,16%), yang terdiri dari 163 (42,12%) jantan dan 224 (57,88%) betina. Jumlah kucing Persia yang diimpor ke Indonesia adalah sebanyak 57 (12,845%) yang terdiri dari 23 (40,35%) jantan dan 34 (59,65%) betina. Jumlah kucing Persia yang terdapat di Jawa Barat (84,14%) lebih banyak dibanding jumlah kucing Persia yang ada di Jakarta (14,86%). Secara umum warna bulu cream (9,01%) dan pola warna solid (34,01%) memiliki persentase tertinggi. Warna cream merupakan warna dilusi dari warna merah (red) yang dapat dihasilkan dari berbagai macam kombinasi warna bulu yang dimiliki tetua sebelumnya, sebagai contoh dari perkawinan tetua yang memiliki warna bulu cream dengan red smoke. Perkawinan antara tetua yang memiliki warna dan pola warna bulu yang tidak murni dapat menghasilkan turunan yang memiliki warna dan pola warna bulu yang bervariasi.
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