Judul: Bioactivity of Cajuput Seedling N-Hexane Extract as an Attractant for Subteranian Termite Coptotermes curvignathus Holmgren (Isoptera: Kalotermitidae)
Abstrak: Serangan rayap tanah (subterranean termite) terhadap anakan kayu putih (Melaleuca cajuputi) terjadi secara masif di cukup banyak Kesatuan Pemangkuan Hutan (KPH) Perum Perhutani di Pulau Jawa. Diduga terjadinya serangan tersebut berkaitan dengan komponen kimia pada akar anakan kayu putih. Suatu penelitian laboratoris telah dilakukan untuk mengetahui bioaktivitas ekstrak akar anakan kayu putih sebagai pemikat (attractant) bagi rayap tanah Coptotermes curvignathus Holmgren (Isoptera: Rhinotermitidae). Proses ekstraksi mengacu pada ASTM D1108-96 dan karakterisasi ekstrak dilakukan menggunakan alat GC-MS. Pengujian bioaktivitas ekstrak dilakukan dengan metode attractiveness bioassay dan no choice feeding bioassay. Hasil penelitian menunjukkan rata-rata rendemen ekstraksi akar anakan kayu putih adalah 4,94%. Atraktivitas larutan ekstrak pada konsentrasi 0,5%, 0,75%, dan 1% masing-masing mencapai 45,33%, 62%, dan 74,67%. Mortalitas rayap C. curvignathus berkisar antara 9,63%-24.44%. Lethal concentration-50 (LC50) ekstrak akar anakan kayu putih adalah 2,45% (non toksik). Hasil analisis GCMS menujukan bahwa ekstrak mengandung asam linoleat yang berpotensi sebagai bahan pemikat serangga., Subterranean termite attacks on cajuput seedling (Melaleuca cajuputi) occured massively in quite a number of Perum Perhutani Forest Management Units (KPH) in Java Island. It is possibly due to the chemical components of the root of the cajuput seedling. A laboratory study was conducted to determine the bioactivity of cajuput root extract as an attractant for the subterranean termite Coptotermes curvignathus Holmgren (Isoptera: Rhinotermitidae). Extraction process refers to ASTM D1108-96 and extract characterization was carried out using GC-MS. The bioactivity test of the extract was carried out using the attractiveness and no choice feeding bioassay methods. The results showed that the average yield of the extract was 4,94%. The attractiveness of the extract solution at concentrations of 0,5%, 0,75%, and 1% on C. curvignathus reached 45,33%, 62%, and 74,67%, respectively. Meanwhile the mortality of C. curvignathus ranged from 9.63%-24.44%. The lethal concentration-50 (LC50) was 2.45% (non-toxic). GCMS analysis revealed that the extract contained linoleic acid, which has been reported as a feeding stimulant.
Keyword: attractivity, LC 50, linoleic acid, mortality, termite attractant

Judul: Anti-termite Properties of the Extractive Substance of Magnolia sumatrana (Miq.)) Against Subterranean Termites (Coptotermes curvignathus Holmgren).
Abstrak: Manglid (Magnolia sumatrana Miq.) merupakan salah satu jenis tanaman yang banyak dikembangkan di hutan rakyat Jawa Barat. Jenis ini relatif cepat tumbuh dan termasuk kelas awet II, sehingga memiliki ketahanan alami terhadap organisme perusak kayu. Penelitian ini bertujuan untuk mengetahui kadar ekstraktif kulit kayu manglid serta mengukur bioaktivitas zat ekstraktif tersebut terhadap rayap Coptotermes curvignathus Holmgren dan menganalisis komponen senyawa kimia yang terkandung di dalam fraksi teraktif. Ekstrak aseton yang diperoleh melalui ekstraksi dengan metode maserasi, difraksinasi secara bertingkat dengan pelarut n-heksan, etil eter, etil asetat. Analisis kimia dilakukan terhadap fraksi yang paling aktif dengan alat GC-MS. Fraksi etil asetat memiliki persentase mortalitas rayap rata - rata tertinggi sebesar 55,47 % serta persentase kehilangan berat kertas selulosa rata - rata terendah sebesar 24,89 %. Senyawa yang diduga mengandung bioaktivitas anti-rayap, yaitu (+)spathulenol dan (-)- Caryophyllene oxide., Manglid (Magnolia sumatrana Miq.) is a plant that is widely developed in the community forests of West Java. This species is relatively fast growing and has durable class II, so it has natural resistance to wood destroyers. This study aims to determine the extractive content of the manglid bark and to measure the bioactivity of the extractive substance against the termite Coptotermes curvignathus Holmgren and to analyze the components of chemical compounds contained in the most active fraction. The acetone extract obtained by extraction by maceration method was fractionated in stages with n-hexane, ethyl ether, and ethyl acetate as solvents. Chemical analysis was carried out on the most active fraction by means of GC-MS. The ethyl acetate fraction had the highest average termite mortality percentage of 55.47% and the lowest percentage of cellulose paper weight loss was 24.89%. The compounds suspected to contain anti-termite bioactivity are (+)spathulenol and (-)- Caryophyllene oxide.
Keyword: Ekstrak aseton, Kulit kayu manglid (Magnolia sumatrana Miq.), Rayap tanah (Coptotermes curvignathus), Bioaktivitas anti-rayap, Mortalitas, Kehilangan berat, Acetone extract, Manglid bark (Magnolia sumatrana Miq.), Subterranean termites (Coptotermes curvignathus), Anti-termites’ properties, Mortality, Weight loss

Judul: Pengembangan distribusi ILOS multimedia (ILOSmedia)
Abstrak: The development of open source softwares is still going rapidly nowadays, including open source operating systems for desktop computer, netbook, tablet PC, and smartphone. The open source operating systems have considerable contribution to open source software. Linux is an open source operating system that continues to grow since 1991. The characteristics in general Linux are free, can be distributed freely, and free to make changes in it. Linux in its development is divided into several distributions. Each distribution is made as a specific goal so that the operating system can focus on running the desired functions, such as multimedia, networking, education, etc. The objective of of this research is to develop and evaluate the ILOS distribution for multimedia by providing multimedia of open source packages. ILOSmedia uses Ubuntu10.10 and Remastersys as a tool to remaster. ILOSmedia is developed by installing multimedia packages that have been obtained based on the results of questionnaires from 30 respondents from three communities, which are KPLI Bogor, Linux.com forums, and Kaskus.us forums. ILOSmedia also uses the Realtime kernel as kernal Mutimedia. ILOSmedia testing is performed by 11 students of Computer Science who are members of FOKERZ community. The testing process is performed by executing ILOSmedia via live-cd and filled in a questionnaire. The test result shows that ILOSmedia has hardware compatibility on notebook and PC with good performance. As much as 72.727% of respondents believe that the size of the installer ILOSmedia of 1.34 GB and a minimum 10GB hard drive is normal. ILOSmedia has multimedia packages complete with the percentage completeness according to respondents is 45.455% are very complete and 54.545% are complete. Boot speed ILOSmedia have an average of 28.87 seconds and 90.91% of respondents consider that ILOSmedia have a desktop environment that is easy navigation
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