Judul: Model Permintaan dan Penawaran Kayu di Indonesia
Abstrak: Informasi yang diperlukan untuk strategi pembangunan pemenuhan permintaan domestik kayu yang dapat berisi formulasi model penawaran dan permintaan yang mampu menerangkan penawaran dalam negeri dan pola pertumbuhan permintaan kayu.
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Judul: Peramalan permintaan bahan pengawet kayu dalam pembangunan perumahan massal sederhana di Indonesia
Abstrak: Hasil penelitian menunjukkan bahwa peubah yang mempengaruhi konsumsi bahan pengawet kayu dalam pembangunan perumahan massal sederhana di Indonesia adalah pendapatan per kapita, harga kayu bangkirai dan jumlah penduduk. Secara bersama-sama semua faktor yang mempengaruhi permintaan bahan pengawet kayu memberikan pengaruh yang nyata pada permintaan bahan pengawet kayu. Hasil peramalan menunjukkan bahwa hingga tahun 1995 permintaan bahan pengawet kayu adalah sebesar 9.194,68 ton dan dengan permintaan rata-rata sebesar 463,55 ton/tahun maka diramalkan tahun 2000 dibutuhkan bahan pengawet kayu sebanyak 11.976,01 ton. Dari target pembangunan perumahan massal sederhana dalam Pelita VI sebanyak 600.000 unit maka kebutuhan kayu diramalkan sebanyak 161.550,4 m³/tahun sedangkan permintaan bahan pengawet kayu diperkirakan 582,56 ton/tahun.
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Judul: DNA Extraction and Characterization of Salmonella‟s Lytic Bacteriophage Genome
Abstrak: Bacteriophages are ubiquitous in nature and are known to proliferate wherever their bacterial hosts exist. Their virion particles can exist independently outside the host, however all phages are need their host to propagate. Several phages are highly specific to host cell surface receptors and any slight changes in structure results in little or no interaction between the phage and its host. Salmonella‟s phage isolated from sewage water where their bacteria exist. Three isolated of phages (phages 15, 19 and 38) were used in this research that concentrated using three types of methods. PEG/ NaCl method was firstly used to concentrate the phages based on their molecular weight to precipitate the phage particles during centrifugation. The second method was Scraping Plaque method. In this method, overlay plaques were scraped and collected in SM buffer to get phage concentrates. Enrichment method was the last method used to concentrate the phages. Phage genome isolation was done using two methods i.e. EDTA/SDS and Proteinase K methods. The first method was done using DNase I to eliminate bacterial DNA followed by SDS/EDTA treatment to release phages DNA and phenol-chloroform-isoamyl alcohol to extract the DNA. DNA was collected by isopropanol extraction. While in Proteinase K method, bacterial DNA was eliminated by DNase I and Proteinase K/SDS was used to degrade phages capsids and ethanol for DNA precipitation. The result showed that PEG/NaCl method resulted the highest phage concentration for phage 15 and phage 19, while scrapping method was the highest for phage 38. The quantity and purity of extracted DNA were low for PEG/NaCl and Scraping methods, while Enrichment method was higher indicated higher purity. Run on agarose gel electrophoresis of extracted DNA confirmed that Enrichment method results were the best while scraping and PEG/NaCl method was appeared smear background. Based on DNA genome size determination, the bacteriphages of Salmonella sp were comparable with other study of Salmonella phages. Phage P15 with genome size of 39,5 kb was close to phage epsilon15. Phage P19 with genome size of 41 kb was close to phage ST160. And phage P38 with genome size of 48,5 kb was close to phage Gifsy-1.
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