Judul: Studi Pembuatan Dodol Tapai Talas Belitung (Xanthosoma Sagittifolium)
Abstrak: Dodol, one of Indonesian traditional food, is very familiar among Indonesian, like dodol from Garut, jenang from Kudus, or suwar-suwir from Jember. Dodol is an intermediate moisture food (IMF) that has 0.60-0.80 water activity (Aw) which could trigger mold and yeast growth and make this product has short shelf life. Taro belitung dodol was made with 2x2x2 cm dimension of taro belitung that has been fermented in 36 hours, rice flour, and sugar. This study used three degrees of sugar concentration treatments 30%, 40%, and 50% sugar concentrations using taro weight as basis. These were evaluated by 70 untrained panelists. The result showed that formula with 30% sugar was selected best. This formula was used for further analyses, such as pH, total titratable acid (TTA), water activity (Aw), texture analysis, proximate analysis, and visual microbes observation. Chemical analysis showed that fermented taro dodol has pH value 5.56 and has TTA 76.23 ml NaOH 0.1 N/ 100 ml sample solution. The fermented taro dodols have 40 days shelf life before microbes growth in and sensory deterioration at 19 days storage
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Judul: Karakteristik Fisik Kimia dan Organoleptik Dodol Susu dengan Penambahan Krim
Abstrak: Dodol made from milk was a modification of regular dodol that usually use coconut milk as main ingredient. Previous experiment was failed to make dodol which met the standard, especially the fat content that far below the standard. The aim of this research was to assess physical, chemical, and organoleptic characteristics of dodol made from milk with cream addition as fat source. The results showed that dodol made from milk with cream addition did not affect significantly (P>0.05) on physical characteristics (yield, aw, hardness, chewiness). Chemical content analysis results showed significant differences (P<0.05) on ash, fat, and protein content. Ash and protein contents in dodol with 10% and 20% cream addition were significantly lower (P<0.05) than control. Fat content in dodol with 10% and 20% cream addition were significantly higher (P<0.05) than control. Hedonic quality test results showed dodol with 20% cream addition affected significantly (P<0.05) on color and aroma intensity. Meanwhile hedonic test results showed cream addition on dodol did not affect significantly (P>0.05) on acceptability of color, aroma, sweetness, and chewiness. Based on physical, chemical, and organoleptic characteristics, it can be concluded that cream can be used as fat source on dodol made from milk and 20% cream addition resulted in dodol that closest to available standard.
Keyword: Bogor Agricultural University (IPB), milk, dodol, cream, characteristics

Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. Suatu graf lengkap berorder 𝑛������ ≥ 3 dan graf r-regular berorder 𝑛������ ≤ 2𝑟������ + 1 merupakan graf Hamilton, Karena kedua graf tersebut memuat cycle Hamilton. Selanjutnya, syarat cukup tersebut digunakan untuk menentukan keberadaan cycle Hamilton pada graf 2-connected 4- regular berorder kurang dari 10.
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular