Judul: Karakteristik Sifat Fungsional Hidrolisat Protein Ikan Lele Dumbo (Clarias Gariepinus)
Abstrak: African catfish (Clarias gariepinus) has a high protein content, which is potential to be used as protein hydrolysate. This research aimed to determine the optimum condition for hydrolysis and to characterize african catfish protein hydrolysate. The optimum concentration of papain used for hydrolysis of African catfish protein was 5% (w/v) for 5 hours hydrolysis time and degree of hydrolysis was 47.238%. Protein hydrolysate from African catfish had a yield of 12.16% and water content of 3.45%; ash content of 2.47%; protein content of 69.26%; and fat content of 0.50%. African catfish protein hydrolyzate had a solubility value of 98.86%; the foam stability of 6.4%; capacity and stability emulsion of 65.90% and 43.18%; water holding capacity of 3.8 mL/g; fat absorption of 6.5 mL/g; and the color (brightness) with a value of L at 57.47.
Keyword: functional properties fish protein hydrolysate, fish protein hydrolysate, African catfish (Clarias gariepinus)

Judul: Pembuatan dan karakterisasi hidrolisat protein dari ikan lele dumbo (Clarias gariepinus) menggunakan enzim papain
Abstrak: Lele dumbo merupakan ikan air tawar yang memiliki banyak keunggulan, yaitu teknologi pembenihan dan pembesaran yang mudah diterapkan dan kandungan protein tinggi. Kementrian Kelautan dan Perikanan Indonesia sedang gencar meningkatkan budidaya ikan lele selama periode tahun 2010 hingga 2014. Salah satu bentuk pemanfaatan ikan lele dumbo yang potensial adalah hidrolisat protein ikan, yaitu produk yang dihasilkan dari penguraian protein ikan menjadi peptida sederhana dan asam amino melalui proses hidrolisis oleh enzim, asam atau basa. Hidrolisat protein ikan memiliki banyak manfaat dalam industri pangan, pakan, pertanian, mikrobiologi dan farmasi. Informasi mengenai proses pembuatan, kondisi optimum, serta karakteristik hidrolisat protein dari ikan lele dumbo sangat dibutuhkan untuk mengembangkan produk hidrolisat protein berbahan baku ikan air tawar.
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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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