Judul: Kualitas Kimia Daging Dada Ayam Broiler yang Pakannya Ditambahkan Campuran Minyak  Ikan Kaya Asam Lemak Omega-3
Abstrak: Ayam broiler merupakan salah satu jenis ayam yang banyak dibudidaya karena memiliki pertumbuhan yang sangat cepat. Daging ayam broiler juga merupakan sumber protein hewani yang murah, aman, mudah didapat dan diolah. Pertumbuhan yang cepat pada ayam broiler diikuti pula oleh pertumbuhan lemak dan koleserol dalam daging. Beberapa penyakit seperti arterosklerosis dan kardiovaskuler berpeluang timbul sebagai akibat dari pola konsumsi lemak dan kolesterol yang berlebihan. Berbagai upaya banyak dilakukan untuk meningkatkan kualitas produk unggas sehingga nilai jualnya pun dapat meningkat. Penambahan asam lemak omega-3 ke dalam pakan banyak dilakukan untuk memanipulasi kandungan asam lemak pada karkas. Salah satu sumber asam lemak omega-3 yang dapat digunakan adalah minyak ikan dari limbah pengolahan ikan sarden yang dicampur dengan ampas tahu.
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Judul: Kualitas Fisik dan Organoleptik Daging Ayam Broiler yang Ransumnya Diberi Penambahan Minyak Ikan yang Mengandung Omega-3
Abstrak: Meat quality of broiler chicken is generally determined with chemical, physical and organoleptic quality. Omega-3 fatty acids obtained from fish oil waste as docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) is a poly unsaturated fatty acid source that has many benefit for human. The objective of this reseach was to determine the effect of fish oil addition containing omega-3 in poultry feed on the physical and organoleptic quality of broiler chicken meat. The different levels of fish oil (0; 2,5; 5 and 7,5%) were added in poultry feed was given to the chicken until 2, 3 and 4 weeks. The experiment was set up in a completely randomized design with 4x3 factorial pattern. The observed parameters were pH, water holding capacity (WHC), tenderness and organoleptic test. The physical data were analyzed descriptively and organoleptic was analyzed by ANOVA and Duncan’s Multiple Range Test. The result showed that the treated breast meat has lower for WHC and more tender than control, but higher pH. The thight meat treated showed that a higher pH and water holding capacity but less tender than control. Organolepticly, the addition of fish oil containing omega-3 fatty acids did not have significantly affect the aroma, colour and texture of meat while taste was affected (P<0,05). Long of feeding omega-3 (2 , 3 and 4 weeks) have significantly affect the meat texture.
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Judul: Analisis Kestabilan Model Virus Komputer dengan Infeksi Tunda dan Pemulihan Tunda.
Abstrak: In this paper, a dynamical model is composed of computer virus model that considers time delay of infection and recovery processes. Stability analysis is performed to both models, i.e. the models with and without time delay. The model without time delay has two fixed points, which one of them is stable and the other is unstable. On the other hand, the model with time delay has fixed points which one of them is spiral stable. If the value of time delay is sufficiently large, then it will imply the stability changes from spiral stable to spiral unstable and subsequently the appearance of limit-cycle and Hopf bifurcation.
Keyword: computer virus model, Hopf bifurcation, time delay