Judul: Pemanfaatan produk nata de coco untuk pembuatan bahan pemantap
Abstrak: Penelitian ini dilakukan untuk melihat kemungkinan penggunaan Nata de coco sebagai bahan pemantap. Peneli- tian dilakukan dengan menggunakan percobaan faktorial yang disusun dalam Rancangan Acak Lengkap dengan ulangan dua kali. Yang menjadi perlakuan yaitu suhu proses (0°C, 10 dan 20°c) dan waktu inkubasi (0,3,6 dan 9 hari). Hasil analisis statistik menunjukkan bahwa perlakuan sure proses dan lama inkubasi serta interaksi kedua pergakuan tersebut memberikan pengaruh yang nyata dap derajat substitusi, kadar CMC, kadar garam, natium glikolat, kadar NaOH dan viskositas dari perantap yang dihasilkan. Interaksi perlakuan terha- kadar produk suhu proses dan lama inkubasi tidak memberikan pengaruh yang nyata terhadap viskositas. Derajat substitusi terendah terdapat pada interaksi perlakuan suhu proses 20°C dan waktu inkubasi 0 hari yaitu 0,51%. Derajat substitusi tertinggi pada interaksi perlakuan suhu proses 10°C dan lama inkubasi 6 hari yaitu. о 0,66%. DST ...
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Judul: Optimalisasi Produksi Nata De Coco Mentah Pada PT Galuh Pratama Kabupaten Ciamis Jawa Barat
Abstrak: Nata de coco Is a food product yielded from natural coconut water process fermentation by entangling bacterium of acetobacter xylinum, so that form the lump bromassa cosist of cellulose owning solid form, white chromatic. At the height of society awareness for the importance of health result the nata de coco become one of health product which a lot of enthused by society. This research to analyse the optimalisation of product the raw nata de coco at PT. Galuh Pratama, Ciamis, West Java. Make up of amount of request nata de coco not yet can be served maximally by company because of resource constraint owned. Optimal planning require to be conducted by company because expense limitation, asses to sell product and also sum up product produce also have an affect on to effort conducted by company to get the maximum advantage. Method of data processing use LINDO program to know wether company have productive at optimal condition or not, comparing result of advantage actual optimally and also see the change that happened at change of availability of resource and expense to production and company acceptance.
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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