Judul: Karakteristik Nugget dari Ikan Lele Dumbo (Clarias sp) dengan Bahan Pengisi dan Pelapis dari Talas Bogor
Abstrak: The study was carried out to characterize proximate composition of catfish, taro corms and taro flour and to evaluate the effect of washing catfish mince (0, 1, 2, 3 times) and taro flour’s concentration (0%; 5%; 10%; 15%; 20%) on the parameters of filler. The best result of the previous treatment was used to evaluate the effect of taro flour and maize starch ratio (4:0; 3:1; 2:2; 1:3; 0:4) on the parameters of batter. In order to characterize nugget product and to estimate its self life, the best result of the third treatment was used. The selected nugget product is produced from catfish mince with once washing treatment and 5% taro flour’s concentration as filler, and 1:3 taro flour and maize starch rasio for batter. The most abundant amino acids was glutamic acid (2%) while leucine was the most abundant essential amino acid (0,86%). The fatty acid compositions score showed that unsaturated fatty acid was higher than saturated fatty acid. The highest unsaturated fatty acid was oleic acid (30,44%) and the lowest was miristoleic acid (0,02%). Potassium (K) was the highest mineral content and flour (F) was the lowest ones. Quantitative descriptive analysis showed that nugget product has higher fish flavour and crunchiness, and lower oiliness values than commercial nugget. Results of the present study suggest that TPC appearred to be the main measurable indicators of quality changes in nugget product. Based on TPC, the estimation of product’s shelf life was 27,35 weeks (191,45 days).
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Judul: Karakterisasi Mutu Surimi Segar Ikan Lele Dumbo ( Clarias gariepinus) dan Aplikasinya Untuk Pembuatan Kamaboko
Abstrak: Catfish is one of the flagship products of aquaculture. It is estimated that the production of catfish will continue to increase along with the increase in commodity production of freshwater seed. The increasment of catfish production needs to be balanced with the diversification of the use of catfish products, especially for oversized catfish (10% for every production cycle) which are normally less marketable. One of the alternatives that can be applied is by manufacturing surimi catfish. This study aimed to characterize the quality of catfish based surimi and determine its class in quality standards of surimi-based testing kamaboko with or without the addition of starch. This experiment used four types of washing treatment, which were: Treatment A (without the addition of NaCl and NaHCO3), Treatment B (addition of NaHCO3 0.5%), Treatment C (addition of NaCl 0.3%) and Treatment D (combination NaHCO3 0.5 % and 0.3% NaCl) to obtain the best washing treatment. The results of the experiment showed that treatment D (a combination of 0.5% NaHCO3 and NaCl 0.3%) possessed the best results with a yield of 34.92% (p>0.05), the pH of 6.86 (p>0.05), whiteness 78.97% (p<0.05), gel strength of 505.43 g.cm (p<0.05), and salt-soluble proteins 5.41% (p<0.05). Application of catfish based surimi in kamaboko showed that the score for folding test was 4.67 that was interpreted as "not crack when folded quarter circle", bite test was 7.03 that was considered as "strong enough" and rating hedonic test showed of 5.9 value that was categorized as "somewhat like". Pursuant to the data obtained in this study, surimi catfish was categorized in the fifth grade "5" on the quality standards of surimi-based testing kamaboko with or without the addition of starch.
Keyword: Bogor Agricultural University (IPB), catfish surimi, washing treatments, catfish, kamaboko

Judul: A Continuous Vaccination Strategy in the SVIR Epidemic Model
Abstrak: Vaccination is conducted to minimize the spread of a disease. The vaccination is usually done several times within a fixed time interval. In the SVIR model, it is assumed that individuals do not get immediate immunity following a vaccination program. So according to process of vaccination on SVIR model, there are two strategies, i.e. the continuous vaccination strategy (CVS) and the pulse vaccination strategy (PVS). In this study, only the CVS strategy in epidemic model SVIR is considered. Results of the study indicate that dynamics of the CVS system depends on the basic reproductive number. If the basic reproductive number is less than one, then the disease-free fixed point is asymptotically stable. It means that the disease will eventually disappear from the population. Conversely, if the basic reproductive number is greater than one, then the endemic fixed point is asymptotically stable, which means that the disease will remain exist in the population. Simulation result shows that the vaccination would minimize the spread of disease by reducing the basic reproductive number. If the time for the vaccinated recipients to obtain the immunity, as well as a possibility of vaccinated recipients to be infected are neglected, then the disease will be eradicated. This condition is called an over-evaluating effect of vaccination.
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