Judul: Pengaruh Suhu terhadap Pembentukan Kalsium Fosfat Tersubstitusi Fluor pada Kondisi Supersaturasi
Abstrak: Fluorapatit telah disintesis menggunakan metode hidrotermal dengan variasi suhu hidrotermal (160 ºC, 180 ºC, 200 ºC, 220 ºC). Sumber kalsium berupa CaO didapat dari hasil kalsinasi cangkang telur ayam, sedangkan sumber fosfor dan fluor yang digunakan adalah (NH4)2HPO4 dan NH4F. Fluorapatit dikarakterisasi dengan XRD, FTIR dan SEM-EDX. Hasil XRD menunjukkan bahwa sampel fluorapatit sudah terbentuk. Namun, terdapat impuritas berupa Ca(OH)2 akibat proses nukleasi yang kurang sempurna. Pertambahan suhu hidrotermal tidak memberikan pengaruh yang signifikan terhadap intensitas puncak-puncak fluorapatit. Spektra FTIR juga mendukung data XRD bahwa fluorapatit telah terbentuk yang ditunjukkan oleh gugus fungsi OH- dan PO43- pada seluruh sampel. Disamping itu, Citra SEM menunjukkan bahwa seluruh sampel memiliki morfologi yang seragam dengan bentuk tidak beraturan, menyerupai bunga karang, dan membentuk aglomerasi dengan ukuran partikel berkisar antara 1.285 μm sampai 1.615 μm.
Keyword: fluorapatit, FTIR, hidrotermal, SEM-EDX, XRD

Judul: Idalia Judul Sintesis dan Karakterisasi Fluorapatit dari Limbah Cangkang Telur dengan Metode Sol-Gel
Abstrak: Fluorapatite (FA, Ca10(PO4)6F2) telah disintesis menggunakan metode sol-gel. Kalsium hidroksida, asam fosfat, dan amonium fluorida digunakan sebagai sumber Ca, P, dan F dengan rasio Ca/P sebesar 1.67 dan rasio P/F sebesar 3. Serbuk yang diperoleh dari proses sol gel diamati setelah proses pemanasan pada suhu 600 oC, 700 oC, dan 800 oC selama 2 jam. Tingkat kemurnian, struktur kimia dan analisis fase dilakukan menggunakan alat karakterisasi difraksi sinar-X (XRD) dan Fourier transform infrared spectroscopy (FTIR). Hasil analisis XRD dan FTIR menunjukkan adanya fase fluorapatit, hidroksiapatit dan apatit karbonat tipe-B. Peningkatan suhu ke dalam struktur apatit ternyata dapat meningkatkan intensitas FA. Fluorapatit optimum terbentuk pada sampel yang dipanaskan pada suhu 600 oC.
Keyword: luorapatite, sintering, sol-gel, the crystal structure

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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