Judul: Karakteristik Bumbu Tabur Campuran Rumput Laut (Ulva lactuca) dan Air Rebusan Pindang Tongkol
Abstrak: Bumbu campuran rumput laut dapat digunakan sebagai topping atau pelapis pada makanan. Penelitian ini bertujuan menentukan karakteristik bumbu tabur campuran rumput laut U. lactuca dan air rebusan pindang tongkol. Karakteristik serpihan rumput laut U. lactuca yaitu intensitas warna L, a, dan b 67.39, -9.69, dan 30.59. Kadar air 8.71%, abu 19.41%, lemak 0.14%, protein 20.12%, karbohidrat 51.63%, serat pangan 32.2% dan ukuran partikel 8.33 μm. Karakteristik air rebusan pindang tongkol kering yaitu kadar air 3.73%, abu 33.38%, lemak 0.15%, protein 36.31%, karbohidrat 26.44%, kadar garam 27.80%, derajat putih 48.70%, ukuran partikel 7.00 μm. Asam amino bebas air rebusan pindang tongkol kering didominasi oleh L-histidina, L-leusina, L-arginina, L-lisina, L-asam glutamat, dan L-alanina. Bumbu tabur campuran rumput laut dan air rebusan pindang tongkol yang dihasilkan memiliki komposisi kimia protein 20.82%, lemak 4.52%, dan serat pangan 28.4%.
Keyword: air rebusan pindang tongkol, bumbu, U. lactuca

Judul: Karakteristik Beras Tiruan dengan Penambahan Rumput Laut dan Agar-Agar
Abstrak: Rumput laut jenis Gracilaria sp. penghasil agar-agar yang kaya akan serat dan tanin dapat dijadikan suatu alternatif diversifikasi pangan seperti beras tiruan. Tujuan penelitian ini yaitu mengetahui pengaruh penambahan tepung rumput laut dan agar-agar dari Gracilaria sp. terhadap karakteristik komposisi kimia dan sensori beras tiruan. Penelitian ini menggunakan rancangan acak lengkap (RAL) faktorial dua faktor dengan uji lanjut Duncan, dan Kruskal Wallis. Hasil penelitian menunjukkan bahwa penambahan tepung rumput laut dan agar-agar memberikan pengaruh terhadap komposisi kimia dan kesukaan panelis pada parameter warna, bau, dan tekstur beras tiruan yang dihasilkan. Beras tiruan yang dihasilkan memiliki kadar air berkisar 9,9-13,7%, kadar abu 1,1-4,3%, lemak 0,3-3,7%, protein 2,7-5,9%, karbohidrat 77,7-80,3%, dan serat 0,11-0,95%. Beras tiruan dengan penambahan tepung rumput laut 10% merupakan beras terbaik dan paling disukai berdasarkan nilai sensori dengan kandungan tanin sebesar 0,11-0,2%
Keyword: beras tiruan, rumput laut, serat pangan, tanin

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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