Judul: Pembuatan kecap ikan secara hidrolisis kimia dari daging merah ikan tuna (thunnus albacares)
Abstrak: Dark muscle in Thunnus albacares in considered as waste from loin tuna and canned tuna processing. This waste still actually can be utilized as fish sauce which has economical value. The objectives of this research was to study the fish sauce processing by using acid hydrolisis with dark muscle tuna as raw material. Research was conducted in two steps, where the first step done in order to learn the influence fish and HCI ratio toward the quality of fish sauce especially for protein content.
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Judul: Pembuatan kecap ikan secara hidrolisis asam dari ikan kembung (Rastrellinger spp.)
Abstrak: Tujuan dari penelitian ini adalah membuat kecap ikan se- cara cepat dengan citarasa dan bau yang disukai; agar dapat dimanfaatkan selain oleh perusahaan besar juga oleh industri kecil. Selain itu bertujuan juga untuk memanfaatkan kelebihan produksi ikan kembung yang tidak dapat dipasarkan. Kecap ikan hidrolisis asam dibuat dengan cara menghidro- lisis ikan yang telah dikukus dan dihancurkan. Perlakuan per- bandingan HC1 - ikan yang dicobakan adalah 1: 2; 1: 1 dan 2: 1. Proses hidrolisis dilakukan pada suhu 80°- 85°C selama 18 jam dan pada suhu kamar (29° 31°C) selama 8 hari. Selan- jutnya untuk meningkatkan citarasa kecap ikan yang dihasilkan diteliti juga kemungkinan penggunaan bumbu-bumbu (pekak, wijen, lengkuas dan bawang putih) dan karamel. Pengamatan terhadap kecap ikan meliputi kadar protein, nitrogen bukan protein, amino nitrogen bebas, kadar trime- tilamin, kadar garam, aw, total padatan terlarut, kepekatan warna (absorbansi) dan organoleptik (warna, rasa, bau dan aseptabilitas). Semua pengamatan dilakukan juga terhadap kecap ikan fermentasi sebagai pembanding. Hasil analisis memperlihatkan bahwa rata-rata kadar pro- tein 5,56 gr per 100 ml, nitrogen bukan protein 942,05 mg N per 100 gr, & amino nitrogen bebas 199,22 mg N per 100 gr, ...
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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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