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: 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: Tinjauan Matematis pada Model Makroskopik dan Mikroskopik Arus Lalu-lintas
Abstrak: Traffic flow phenomenon can be described through mathematical model such as continuous dynamic model with an ordinary differential equation so that it can be solved with integral factors. In this paper three simple models of traffic flow are discussed, i.e, two macroscopic and one microscopic models. Macroscopic model formulates dynamics of the traffic flow that occurs on a large number of vehicles on a road. While the microscopic model explains drivers’ behavior in their interaction with other vehicles ahead, i.e, car-following model. This paper shows the existence of ordinary differential equation found in the traffic flow model and indicates some different representations in the context of the same model. It also reviews a simple model of traffic flow along a single link, which leads to some unexpected results, i.e, it can express the solution model in term of link outflows as well as trip time. In the microscopic model, simulation is done to illustrate the behavior of the drivers with a sensitivity coefficient as a benchmark parameter.
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