Judul: Pengaruh Kombinasi Jenis Kayu Terhadap Fisis Mekanis Kayu Laminasi Diagonal
Abstrak: Pemakaian kayu oleh masyarakat cenderung meningkat baik Kualitas maupun kuantitasnya. Penggunaan kayu yang bermutu tinggi dengan berbagai macam ukuran untuk bahan bangunan atau untuk keperluan lain dalam jumlah yang banyak tidak diiringi oleh persediaan yang memadai. Bila kondisi ini dibiarkan berlarut-larut tanpa diusahakan jalan keluarnya dikhawatirkan konsumen akan beralih ke bahan substitusi lain. Untuk itu diperlukan usaha mengurangi penggunaan kayu yang sulit dijumpai dan menggantikannya dengan kayu-kayu yang kurang dikenal namun memenuhi syarat sebagai bahan konstruksi. Alternatif lain, memanfaatkan kayu-kayu yang mempunyai mutu rendah dikombinasikan dengan kayu-kayu bermutu tinggi sehingga akan dihasilkan produk berupa kayu laminasi. Usaha mencari jalan keluar untuk memanfaatkan kayu secara optimal sebagai bahan bangunan di atas dengan tetap memperhatikan persyaratan yang dibutuhkan sesuai dengan tujuan penggunaan akhir.
Keyword: kayu laminasi

Judul: Pengaruh pengukusan lamina terhadap sifat fisis dan mekanis balok laminasi konvensional
Abstrak: Bertambahnya jumlah penduduk serta kemajuan teknologi menyebabkan meningkatnya kebutuhan akan lahan untuk pemukiman, disertai dengan meningkatnya kebutuhan perumahan. Hal tersebut akan mengakibatkan kenaikan konsumsi kayu sebagai bahan bangunan. Salah satu alternatif untuk memenuhi kebutuhan masyarakat akan kayu sebagai bahan bangunan dan keperluan lain- nya adalah mengolah kayu berkualitas rendah menjadi balok laminasi. Balok laminasi merupakan suatu hasil pengikatan bersama sejumlah lapisan kayu atau papan kayu dimana arah serat kayu dari seluruh lapisannya sejajar. Balok laminasi konvensional menggunakan perekat untuk mengikat antara satu lapisan dengan lapisan kayu yang lainnya. Pengukusan terhadap lamina yang berkadar air di bawah titik jenuh serat diharapkan disamping mengeluarkan air juga mengurangi kadar ekstraktif kayu yang menghalangi atau memperlemah terjadinya proses perekatan.
Keyword: balok laminasi

Judul: Phylogeography and Species Limits in the Papuan White Snake (Micropechis ikaheka) (Reptilia: Serpentes: Elapidae)
Abstrak: Papua white snake, Micropechis ikaheka, has been distingushed into two subspecies M.i. ikaheka and M.i. fasciatus. However, due to lack of data on their morphology, distribution and ecology, both subspecies often ignored in scintific discussions and refers only byas , Micropechis ikaheka. This study was designed to document the differences between M.i. ikaheka and M.i fasciatus by using scales characteristics and reproductive organ or hemipenes. The study also examine, zoogeography, habitat, diet and cannibalism of both subspecies to better understanding the the ecology of one of the most venomous snakes in the world. This study consists of three topics with method and also different in the size samples, respectively. The first study is the histology and microtopography of the skin were studied using paraffin method and Scanning Electron Microscope (SEM). The second is the hemipenis were examined by following Myers and Cadle (2003), and Zaher and Prudente (2003). The third is the abdominal surgery was carried out to document diet type and the investigate phenomenon of cannibalism in the snake. Specimens for this study came from the collection from Museum Zoologicum Bogoriense (MZB) and Universitas Negeri Papua’s Laboratory (LZU). The research result also indicated that the markers of skin and hemipenis described the same structure and microornamentation in all M. ikaheka groups being compared. Based specimens examined morphological descriptions do not s support the further differentiation in Micropechis. In short, two markers that used in this study could not sufficiently indicate the differences in the level of species and subspecies of M. ikaheka. The study, however, were able to delineate zoogeography and skin color patterns, which fall into four groups: M. i. ikaheka; M. i. fasciatus. M. i. ssp. “intermediate”; and M. i. ssp “black”. This study also revealed that color variations did not overlap in their geographic distribution. It is therefore, it suggested that environmental factors may contribute to the skin color variations. It also assumed that habitat discontinuous and biogeography factors may also cause the loss of the connection between the original populations (vicarians) or follow colonization events (dispersal). The examined of 22 stomach contents of M. ikaheka shows this species is carnivorous, and prey on vertebrates such as amphibians, fish, reptiles, and Mammals. These snakes are opportunistic predators since they prey on all that can be captured, but mainly reptiles (61.5%), followed by mammals and fish (both 15.4%), and amphibians (7.7%). Although categorized as terrestrial animal, the diet study showed that M. ikaheka snakes often go into the water to hunt for fish (the sample from Yapen island), including eel (the sample from Aru island). Based on prey items indentified, there is evidence that M. ikaheka is cannibal. At this time, there still no record on reason for cannibalism, but it is assumed that cannibalism was due to competition between populations and means to control population.
Keyword: geographic variation, white snake, papua