Judul: Pengaruh Konsentrasi Bahan Pengawet Boron terhadap Retensi dan Penetrasi pada Kayu Rakyat
Abstrak: INTRODUCTION. Nowadays, wood supply from natural forest continues to decrease. It resulted in the development of community forest in many areas in Indonesia. In general, community forest has been developing using fast-growing species. The wood obtained is generally inferior compared to that from the natural forest, particularly in term of natural durability and strength. Therefore, it is necessary to improve the quality of such kind of woods. The aims of the research were to determine the natural durability of wood species from community forest and to evaluate effect of boron concentration onto retention and penetration of these species. Wood natural durability was evaluated after exposing the samples in the field for 3 months following the procedure of American Standard for Testing and Material (ASTM) D 1756 2008. MATERIALS AND METHOD. The main materials used were the wood of durian (Durio zibethinus), karet (Hevea brasiliensis), manii (Maesopsis eminii) and petai (Parkia speciosa) from small business unit of sawmill in Cinangneng, Bogor. The others are boron with three concentrations (5%, 10% and 15%) as the preservative, and curcuma extract, alcohol, chloric acid (HCl), aquades and salicylic acid as dying solution. Preservation process applied was cold bath method for 2 hours. Retention and penetration were used as the indicator. Data was then analyzed using experimental design factorial randomly by two factors (wood species and boron concentration) with three replications. RESULT AND DISCUSSIONS. The result showed that natural durability of all wood species studied was low. It belongs to Durability Class of IV and V. This indicates that all wood species need to be enhanced through the preservation. Based on this study it showed that petai wood has the highest value of the retention (4.31 kg/m3), while durian wood was the lowest (2.37 kg/m3). Retention value of karet wood, known is rubberwood, was almost similar to that of manii wood. Result also showed that penetration value of all wood species studied were almost similar namely 50.13% (durian), 51.55% (karet), 51.57% (petai) and 52.78% (manii). The results indicate that retention value was influenced by wood species, boron concentration and the interaction of these two factors, while penetration value was only affected by the concentration. Factors of wood species which affect the retention are related to the anatomical structure, as well as the existence and the amount of free hydroxyl group (-OH-) that are present in the cell wall components. In general, retention and penetration values tend to increase with the increasing of boron concentration. In all wood species studied, the concentration of 15% resulted in the highest of retention and the deepest of penetration.
Keyword: 

Judul: Ketahanan tiga jenis kayu hutan rakyat yang diawetkan dengan bahan pengawet boron terhadap serangan rayap tanah
Abstrak: Banyak masyarakat memakai kayu dengan umur yang masih muda untuk memenuhi kebutuhan, sehingga mutu kayu yang diperoleh tidak terlalu baik dalam hal keawetan. Akibatnya masa pakai kayu juga semakin pendek dan pemborosan dalam pemakaian bahan baku kayu pun terjadi. Upaya efisiensi penggunaan bahan baku kayu perlu dilakukan untuk memenuhi permintaan kayu yang semakin bertambah dengan melakukan pengawetan terhadap kayu yang akan digunakan. Tujuan dari penelitian ini adalah untuk mengetahui ketahanan tiga jenis kayu dengan memakai bahan pengawet persenyawaan boron (asam borat 45% + Boraks 54%) dengan konsentrasi 1,5%, 3% dan 4,5% BAE. Jenis kayu yang digunakan adalah kayu karet (Hevea brasiliensis Muell, Arg), jati (Tectona grandis L.E) dan trembesi (Samanea saman Jacquin). Metode pengawetan yang digunakan adalah rendaman dingin selama 10 hari, pengukusan 2 jam dan rendam dingin 2 hari, dan vakum tekan. Penelitian ini dilakukan di Laboratorium dan lapangan. Hasilnya menunjukkan dari ketiga jenis kayu diawetkan dengan berbagai konsentrasi, ternyata kayu karet dan jati efektif menggunakan proses pengawetan pengukusan 2 jam dan perendaman 2 hari dan kayu trembesi efektif menggunakan perendaman dingin selama 10 hari dengan konsentrasi 1,5%. Untuk penelitian lapangan ketiga kayu ini tidak tahan terhadap serangan. Sehingga bahan pengawet ini tidak cocok digunakan untuk penggunaan diluar atap atau alam terbuka dan cocok untuk penggunanan interior seperti barang kerajinan, mebel dan peralatan rumah tangga. Kata kunci: Pengujian laboratorium dan lapangan, rayap tanah, senyawa boron, pengawetan.
Keyword: Laboratory and field test, Subteranean termaites, Boron compound, Preservation

Judul: Trichomonas Gallinae Penyebab Trichomonosis Pada Unggas
Abstrak: Trichomonas gallinae adalah protozoa yang bergerak aktof dengan keempat flagella yang mempunyai layar dan pada salah satu sisinya terdapat membran seperti sirip ikan yang berombak. Spesies dari genus Trichomonas ini mempunyai arti penting pada unggas, karena dapat menyebabkan infeksi pada alat pencernaan bagian atas.
Keyword: