Judul: Karakteristik Fisikokimia dan Prebiotik Tepung Daluga (Cyrtosperma Merkusii (Hassk.) Schott) Hasil Modifikasi Fermentasi Bakteri Asam Laktat (BAL) dan Heat Moisture Treatment (HMT).
Abstrak: Daluga (Cyrtosperma merkusii. (Hassk.) Schott) adalah salah satu umbi yang berasal dari Kepulauan Siau, Manado, Sulawesi Utara. Kandungan pati dan amilosa daluga yang cukup tinggi berpotensi sebagai bahan baku pembentukan pati resisten (Resistant starch/RS). Tujuan penelitian yaitu meningkatkan kadar RS pada tepung daluga dengan modifikasi metode HMT menggunakan oven (100° C, 16 jam), otoklaf (121° C, 60 menit), dan kombinasi fermentasi BAL menggunakan Lactobacillus plantarum BSL (37° C, 18 jam) dan HMT. Dari ketiga modifikasi diperoleh metode terbaik berdasarkan parameter kadar serat pangan, pati resisten, dan amilosa yaitu TD-HMT otoklaf masing-masing sebesar 18.55%, 8.81%, 20.21%. Hasil evaluasi sifat prebiotik dari TD dan TD-HMT otoklaf menunjukkan bahwa TD-HMT otoklaf berpotensi sebagai prebiotik. Nilai sifat prebiotik TD-HMT otoklaf yang diperoleh untuk aktivitas prebiotik, indek dan efek prebiotik, ketahanan terhadap cairan asam lambung artifisial masing-masing sebesar 0.17%, 3.74%, 0.97%, 92,3%.
Keyword: HMT, pati resisten, tepung daluga modifikasi, sifat prebiotik

Judul: Improvement Resistant Starch Type 3 Content of Daluga Starch (Cyrtosperma merkusii) by Physical and Chemical Modification, and Evaluation of Prebiotic Properties by In Vitro
Abstrak: Umbi daluga yang digunakan diperoleh dari Kepulauan Siau, Provinsi Sulawesi Utara, Indonesia. Umbi daluga memiliki kandungan karbohidrat tinggi. Pati merupakan salah satu komponen karbohidrat yang penting dan sangat berpotensi dikembangkan sebagai sumber RS. Namun, secara alami pati daluga memiliki kadar RS yang rendah. Oleh karena itu, diperlukan suatu metode modifikasi pati untuk meningkatkan kadar RS dalam umbi daluga tersebut. Metode modifikasi yang dapat digunakan berupa modifikasi secara kimia maupun fisik yang terdiri dari hidrolisis asam, debranching, autoclaving-cooling, dan heat moisture treatment (HMT)., The giant swamp taro starch or daluga corm starch in this study was extracted from corms collected from Siau Island of North Sulawesi Province in Indonesia. Daluga corm has higher carbohydrate. Its starch potential used as source of resistant starch, but daluga native starch lowest resistant starch content, so some starch modified method were needed to increased its resistant starch content. Modification starch by physical and chemical method such as acid hydrolisis, debranching, autoclaving-cooling, and heat moisture treatment. Modification of daluga native starch for increase resistant starch type 3 (RS3) content.
Keyword: RS3 and daluga starch modified, physical and chemical modification, chemical properties, prebiotics properties

Judul: Approximation of the Median of Poisson Distribution Using the Relation of Poisson-Gamma Distribution
Abstrak: A major drawback of median is that median cannot usually be defined in closed form, even in the cases where their distribution functions are known. This study gives an approximation of the closed form for the median of the Poisson distribution by using the relation of Poisson-Gamma distribution. The approximation uses elementary techniques based on the monotonicity of certain sequences involving tail probabilities of the Poisson distribution and the Central Limit Theorem. Furthermore, a closed form expression for the mean absolute deviation 􀜧|􀜰􀰒 􀵆 􀜯􀝁􀝀􁈺􀜰􀰒􁈻| is also studied. The median is relevant because of the fact that it minimizes the mean absolute deviation of a Poisson random variable (􀜰􀰒􁈻 by considering median as central tendency.
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