Judul: Kajian Rumput Laut Euchema cotonii Sebagai Sumber Serat Alternatif Minuman Cendol Instan
Abstrak: Serat pangan (Dietary fiber) seringkali identik dengan produk sayuran yang segar. Manfaat serat dapat diperoleh juga melalui produk olahan yang mengandung bahan dasar rumput laut. Dalam produk makanan, rumput laut seringkali digunakan sebagai alternatif bahan yang menguntungkan dan dapat meningkatkan nilai gizi. Penambahan rumput laut sebagai sumber serat akan mampu meningkatkan nilai jual es cendol yang telah dikenal masyarakat dari sisi cita rasa dan pada kandungan seratnya juga sehingga dapat dimanfaatkan sebagai sumber serat pangan (dietary fiber) alternatif. Rumput laut Euchema cotonii yang digunakan dalam penelitian ini memiliki komposisi kimia; kadar air 96,12%, kadar lemak 1,55%, protein 20,10%, abu 6,96%, karbohidrat 71,39%, serat pangan larut 15,46%, serat pangan tak larut 38,96%, serat pangan total 54,38%, dan iodium 55,46 μg/g. Dengan demikian, rumput laut Euchema cotonii dapat digunakan sebagai sumber serat dalam cendol instan. Selain sebagai sumber serat, Euchema cotonii dapat juga digunakan sebagai sumber iodium.
Keyword: Dietary fiber, Organoleptic, Euchema cotonii

Judul: Kajian rumput laut sebagai sumber serat alternatif untuk minuman berserat
Abstrak: AZRINA CHAIDIR. Study on Seaweed as Alternative Dietary Fiber for Health Drink. Under the direction of USMAN AHMAD and SANTOSO Seaweed is one of marine commodities with high potential as dietary fiber source. The composition, dietary fiber and some physico-chemical properties of two red seaweeds powder (made from Eucheuma cottonii and Glacilaria sp) and one brown seaweed powder (made from Sargassum sp) was investigated using different blanching method and drying temperature. The methods of blanching are fresh water about 9 hours, rice powder solution with 5 % konsentration about 9 hours and combination fresh water and 0,5 % CaO solution. The oven temperature that used for drying seaweeds was 50 and 70 oC. The best blanching method for Eucheuma cottonii and Sargassum sp are fresh water about 9 hours, and for Glacilaria sp is combination fresh water and 0,5 % CaO solution. The best temperature for drying seaweeds are 70 oC. The seaweed powders have good appearance, smell and texture. Eucheuma cottonii powder has 72,19 % soluble dietary fiber, 11,23% insoluble dietary fiber out of 83,42% total dietary fiber. Glacilaria sp has 62,95% soluble dietary fiber, 20,67% insoluble dietary fiber out of 83,62% total dietary fiber. Meanwhile, Sargassum sp has 24,99% soluble dietary fiber, 57,62% insoluble dietay fiber out of 82,61% total dietary fiber. The health drink with Eucheuma cottonii and a combination of E. cottonii and Glacilaria sp powders as fiber source were accepted by panelis although less favourable in flavor and taste compared with commercial health drink.
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Judul: Dynamical System of Hepatitis B in Three Groups with Vaccination
Abstrak: The aim of this study is to modify the hepatitis B transmission model in three age groups involving vaccination from the model conducted by Zhoe and Zhang.The method used is to analyze the stability of the fixed point and its basic reproduction number (R_0). Performed stability analysis and numerical simulation to see population dynamics. Next, a sensitivity analysis of the parameters was carried out to see its effect on R_0. From the analysis obtained two fixed points, namely non-endemic and endemic fixed points. Non-endemic fixed points are locally asymptotically stable if R_0 <1 Meanwhile, the endemic fixed point is locally asymptotically stable if R_0 > 1. Hepatitis vaccination affects the number of susceptible population, because the more successful the vaccination, the smaller the number of susceptible populations so that the smaller the population will be infected.
Keyword: Dynamic, Hepatitis B, Vaccine, Mathematical model