Judul: Kemasan Aktif dengan Antioksidan Astaxanthin Eksoskeleton Lobster Air Tawar
Abstrak: Plastik polietilen banyak digunakan sebagai material kemasan. Difusitas oksigen pada polietilen yang rendah belum mampu mencegah kerusakan pangan akibat oksidasi. Antioksidan astaxanthin dari eksoskeleton lobster air tawar dapat menjadi komponen aktif kemasan modern polietilen yang mencegah kerusakan produk pangan. Penelitian bertujuan menentukan karakteristik kemasan aktif polietilen untuk produk pangan dengan antioksidan dari astaxanthin eksoskeleton lobster air tawar. Penelitian meliputi komposisi kimia eksoskeleton lobster air tawar, ekstraksi dan karakterisasi karotenoid/astaxanthin, serta karakterisasi kemasan aktif polietilen pada produk pangan. Eksoskeleton lobster air tawar memiliki kadar air 51.09-52.72%, abu 18.18-18.65% dan protein 15.15-15.56%, unsur kimia oksigen, kalsium, fosfor, natrium, dan gugus fungsi utama amida II serta kalsium karbonat. Ekstraksi menghasilkan astaxanthin/karotenoid 55.9 mL dari 10.02 g yang terdeteksi pada puncak gelombang 470 nm serta memiliki indeks aktivitas antioksidan 0.060. Karakteristik kemasan aktif polietilen pada produk pangan dengan 27.95 mL astaxanthin/karotenoid dapat menahan Free Fatty Acid (FFA) 0.56-0.43 % dan Peroxide Value (PV) 10.83-9 meq/kg.
Keyword: x antioksidan, astaxanthin, karotenoid, lobster air tawar, polietilen

Judul: Pencirian Plastik Antioksidan Paduan Poli(asam laktat)-Lilin Lebah dengan Penambahan Pemlastis Polietilena Glikol
Abstrak: The use of conventional plastics for packaging food has caused environmental and health problems. Antioxidant plastic poly(lactic acid) (PLA) and beeswax blend with polyethylene glycol addition as plasticizer can be a potential alternative for preparing biodegradable plastic. PLA-beeswax blend plastics were produced from PLA and beeswax solution with various compositions, i.e. 40:60, 50:50, 60:40, 70:30, and 80:20 by weight with polyethylene glycol level of 0,005; 0,01; and 0,02 g. The analysis was performed to measure density, tensile strength, morphological, and functional groups. Tensile strength, elongation, and density increases with the increasing PLA constituents. Functional group analysis showed a physical interaction. Plastic morphological results showed a good homogenous properties. PLA-beeswax ratio of 80:20 with the composition of polyethylene glycol 0,01 g produced the best mechanical properties.
Keyword: 

Judul: Pendugaan Curah Hujan Dengan Bayesian Network Studi Kasus: Curah Hujan di Daerah Indramayu
Abstrak: The objective of this study was to built the probabilistic modeling and to compare the Bayesian Networks (BNs) method which considers the spatial dependencies among variables for predict rainfall to Auto Regressive Integrated Moving Average (ARIMA) method which assumes the spatial independencies among variables. This research use rainfall data of 14 stations in period 1979 to 2001 in Indramayu, West Java. A network is generated by K2 algorithm, and this networks is used to built probabilistic model using multinomial BNs. The rainfall prediction is based on the combination of Gaussian BNs and ARIMA (BNARIMA). The result shows that BNARIMA is more effective to represent the spatial dependencies among the stations and to predict rainfall than ARIMA.
Keyword: