Judul: Perbandingan Prosedur Operasional Standar Biodegradasi Bahan Metode DOC die-away dengan Metode Botol Tertutup
Abstrak: Tests for biodegradation of chemicals by the Organization for Economic Cooperation and Development (OECD) are divided into two types, which are ready and inherent biodegradations. Dissolved organic carbon (DOC) die-away and the closed bottle are the method in ready biodegradation test. Results from material decomposition by microorganisms in waters can be seen in the concentration of dissolved organic carbon (DOC method of die-away) and dissolved oxygen consumption (closed bottle method) by microorganisms. Analysis on number of colony is performed to determine the existence of microorganisme. In this research, microorganisms analysis was conducted by cup count method. Number of colonies grown on the agar media counted with naked eye and the result was 2.13 × 104 colonies/mL for DOC mud and 2.3 × 106 colonies/mL for the covered bottle mud. Degradation percentage of DOC die-away methods which measures the ratio between DOC concentrations at the appointed time with the initial concentration of DOC obtained better results than the closed bottle method is the ratio between BOD value divided by ThOD (theoretical oxygen demand) or COD. Sodium benzoate as a control showeed ThOD about 1.66 mg O2/mg materials meanwhile the test materials had COD value of 1.83 mg O2/mg materials.
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Judul: Penguraian Termal serta Pengaruh Jenis Media Tanah pada Laju Penguraian Aerob Plastik Oksobiodegradabel dan Edible Film
Abstrak: Degradation of oxobiodegradable plastic (OBP) in the environment has been studied by thermal and aerobic degradation tests. Thermal degradation of OBP was studied at 70, 110, and 150 °C and the chemical bonding transformation was analyzed by Fourier transform infrared spectroscopy. Based on the analysis, OPB could be degraded at temperature above 110 °C. Aerobic degradation was performed based on ASTM D5988-03, by using Martha Tilaar soil media which had C/N ratio of 5. The results have not yet fulfilled the degradation standard requirement. Aerobic degradation rate of OBP was 13.6 mg/24 days and was predicted to be biodegraded completely within ca. 12 months. In the same media, the degradation rate of edible film was faster than the OBP degradation rate. Several factors may affect the degradation rate, including sample raw material, total number of microbes, ash content, moisture content, temperature, and humidity of the environment.
Keyword: plastic, oxobiodegradable, edible film, aerobic degradation

Judul: Warna bulu kucing ras persia: variasi pola warna dan pewarisannya
Abstrak: Kucing Persia mempakan kucing rasyang paling urnum dijumpai di Indonesia. Kucing Persia memiliki bulu yang panjang dengan variasi wama bulu yang sangat beragam. Perkawinan yang lebih terarah sangat perlu dilakukan untuk meningkatkan kualitas genetik warna dan pola wama bulu kucing. Penelitian ini bertujuan untuk rnempelajari variasi warna dan pola wama bulu kucing Persia yang terdapat di Indonesia, yang dilakukan di kantor pusat Cat Fancy Indonesia mulai bulan Oktober 2000 sampai Januari 2001. Data yang digunakan rnempakan data pedigree kucing Persia yang tercatat di Cat Fancy Indonesia dari tahun 1997 sampai Oktober 2001 yang terdiri dari 187 jantan dan 258 betina, selain itu juga dilakukan pengamatan langsung kepada tiga penyayang dan breeder kucing yang ada di Bandung.
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