Judul: Optimasi Perendaman Natrium Bisulfit dan Asam Askorbat pada Proses Pembuatan Tepung Bawang Merah (Allium ascalonicum L.)
Abstrak: Production of shallot increase significantly in Indonesia fixed by processing flesh of shallot into powder. The purpose of this research is optimization of high quality shallot powder processing to give added value. Flesh red onion soaked, dried with tray dryer, blended, and filtered until form red onion powder. All of analyses parameters ranked to get 0.2% ascorbic acid treatment at Bima variety as the best shallot powder with 4.0399±0.7908% wet basis (wb) moisture content, 4.4539±0.1358% wb ash content, 1.2401±0.6499% bw fat content, 15.5631±0.2861% wb protein content, 61.9461±4.1168 mg/100g wb vitamin C content, 256.3922±16.2627 ppm total fenols, 50.7078±2.3167 ppm anthocyanins, 2612.4097±408.9414 ppm quercetins, 225.7260±4.0702 μg/mL antioxidant activity ekuivalen, and 83.0508±1.6949% inhibition of free radical. Physich characteristics based on oHue values has yellow to red colour.
Keyword: sodium metabisulphite, shallot (Allium ascalonicum Linn.) powder, ascorbic acid

Judul: Optimasi Bahan Pengisi dan Penstabil terhadap Antioksidasi Fisikokimia dan Organoleptik Tepung Bawang Merah (Allium ascalonicum L)
Abstrak: One way of preserving the fresh shallot is by processing it into the powderform. The purpose of this study is to optimize the addition of fillers ingredients and the stabilizer on the making process of Bima-variety of shallot (Allium ascalonicum L) powder to avoid damage on shallot in order to keep antioxidant containts and other quality parameters during dryng process. The optimization was conducted by Response Surface Methode (RSM). The selected formula is the fourth (4th) formula with addition of maltodextrin 0.65%, tapioca, 6.50%, and citric acid 225 ppm with the value yield 15.44 %, water content 2.63%, ash content 2.14%, fat content 0.45%, protein content 8.02%, crude fibre content 4.42%, vitamin C 150.23 mg/100g, total phenols 6327.42 ppm Gallic Acid Equivalence (GAE), antioxidant activity 902.71 ppm Ascorbic Acid Equivalent (AAE) with 94.74% inhibition of free radical. The best treatment according to the organoleptic-parameters is using addition of maltodextrin 1%, tapioca 10% and citric acid 300 ppm and the color of shallot powder based on the Hue°-value is a reddish yellow.
Keyword: Shallot (Allium ascalonicum L) powder, citric acid, tapioca, maltodextrin, Bogor Agricultural University (IPB)

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