Judul: Karakteristik Kimia dan Fisik Filet Ikan Patin (Pangasius hypophthalmus) Lokal.
Abstrak: Penelitian ini bertujuan menganalisis karakteristik kimia filet ikan patin yang meliputi proksimat, warna, asam lemak, profil protein, H2O2, fosfor, Cd dan Pb, dan WHC, serta fisik yaitu uji sensori dan driploss filet patin lokal dengan merek berbeda. Perbedaan merek filet ini berpengaruh nyata terhadap kadar air, abu, fosfor, WHC, dan driploss (P<0.05). Filet ini tidak mengandung H2O2. Kandungan logam berat Cd dan Pb dalam keadaan normal karena dibawah baku mutu total Pb dan Cd dalam olahan ikan. Nilai pH mendekati netral dan tidak berbeda nyata (P>0.05). Asam lemak terdiri dari SFA, MUFA, dan PUFA. dan tidak berbeda nyata (P>0.05). Profil protein dengan SDS PAGE terdiri dari bobot molekul 95, 85.6, 75, 67.8, 57.2, 52.5, 50, 47.7, 45.6, 42.2, 37, 25, 14, dan 10 kDa. Perbedaan merek dan posisi filet bagian depan, tengah, dan belakang mempengaruhi nilai L (lightness) (P<0.05). Uji sensori parameter warna terhadap filet mentah dan kukus, serta parameter rasa terhadap filet kukus berpengaruh nyata (P<0.05).
Keyword: asam lemak, Cd, driploss, fosfor, H2O, WHC

Judul: Karakteristik Filet Ikan Patin (Pangasius sp.) Dalam Negeri dan Impor
Abstrak: Ikan patin (Pangasius sp.) merupakan salah satu ikan nasional yang budidayanya meningkat secara signifikan setiap tahunnya. Kebutuhan ikan patin di Indonesia mencapai 700 ton/bulan, produksi patin dalam negeri hanya 100-120 ton, sisanya diperoleh dari impor. Tujuan penelitian ini adalah menentukan dan membandingkan karakteristik filet ikan patin dalam negeri dan impor. Tahapan penelitian yang dilakukan meliputi analisis proksimat, profil asam lemak, profil asam amino, warna, konsentrasi mioglobin, dan uji organoleptik. Hasil penelitian menunjukkan bahwa filet patin Jambi mempunyai kadar protein, kadar lemak, dan kadar abu tertinggi dan berbeda nyata dengan yang lainnya (P<0,05). Filet patin Jambi mengandung asam lemak jenuh (SAFA) dan asam lemak tak jenuh tunggal (MUFA) tertinggi, namun kandungan asam lemak tak jenuh jamak (PUFA) terendah. Kandungan asam amino tertinggi terdapat pada filet patin Jambi. Analisis warna dengan nilai L, a, dan b tertinggi secara berturut-turut yaitu filet patin Karawang, impor, dan Jambi. Berdasarkan uji organoleptik, perbedaan lokasi tidak mempengaruhi cita rasa dan aroma sampel., Catfish (Pangasius sp.) is the one of national freshwater fish that its cultivation increases significantly every year. The demand of catfish fillet in Indonesia reaches 700 ton/month but domestic just produces about 100-120 ton/month; the others imports from abroad. The objective of this study was to determine and compare the sensory and chemical characteristic of domestic and import catfish. This study determine proximate composition, fatty acid and amino acid profiles, color, myoglobin concentration, and organoleptic test. The result showed that Jambi’s catfish fillet had the highest protein, fat, and ash contents and significantly difrerent with the others (P<0.05). Jambi’s catfish fillet contained the highest amino acid it also had the highest saturated fatty acids (SAFA) and mono unsaturated fatty acids (MUFA). However, it had the lowest poly unsaturated fatty acids (PUFA). In adition, the highest value of L, a, and b were found on fillet from Karawang’s catfish, import catfish, and Jambi’s catfish, respectively. The highest myoglobin concentration obtained from Jambi. Based on organoleptic test, differences of location did not affect to taste and smell of sample.
Keyword: filet patin, kandungan gizi, mioglobin, warna

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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