Judul: Formulasi cookies berbasis pati garut (Maranta arundinaceae Linn.) dengan penambahan tepung Torbangun (Coleus amboinicus Lour) sebagai sumber zat gizi mikro
Abstrak: Food is one of the basic of human needs that have to be compiled with. Therefore, the government in Indonesia have organized it by the Laws of Food in 1996 Number 7. Laws of Food in 1996 Number 7 also organize about food security. Food security is one of the concept where most of people- individuals and families-citizens of the country could get their needs of food easily. Food diversification is one of the efforts to establish food security. And, one of the most important of food diversification concept is to diversify carbohydate sources. This research based on Presidential Regulation Number 22 Year 2009 and Ministry of Agricultural Regulation Number 43 Year 2009 for increasing food consumption diversification through balanced diet. Carbohydrate sources are not only from rice, but also from other crops like tubers. Tubers in Indonesia are very large amount and kinds. One of them is arrowroot (Maranta arundinaceae Linn.). Many people have known about arrowroot but the research of arrowroot utilizations are still lack. So, it`s so important to make it in research. The purpose of this research was to get the most appropriate formulation of arrowroot starch and torbangun flour cookies as micronutrients sources. The experimental design used in this study was a randomized block design. The level of adding torbangun flour to arrowroot starch was 0%, 10%, 15%, and 20%. The study showed that the 10% adding of torbangun flour was the most organoleptic level. The addition of torbangun flour also could be the sources of micronutrient of calcium (376.60 mg/100g) and iron (3.83 mg/100g). It is recommended that the people should eat 100-gram cookies per day to fulfill the nutrient requirement.
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Judul: Bioavailabilitas kalsium dan zat besi in vitro cookies pati garut (Maranta arundinaceae L) dengan penambahan Torbangun (coleus amboinicus Lour) pada berbagai minuman
Abstrak: Mineral deficiencies, such as calcium and iron, remain a major problem in many developing countries including Indonesia. Arrowroot starch cookies with torbangun flour addition (namely PGT cookies) is one of innovative product which is developed as one of micronutrient source. PGT cookies contain 527 Cal, calcium 405.18 mg/100g and iron 3.76 mg/100 g. PGT Cookies as snack are commonly consumed with drinks, such as tea, portable water, coffee and milk. Nutrient and non-nutrient contain of food which is consumed together can interact one another and possibely influence nutrient bioavailability. This research aimed to indetify calcium and iron in vitro bioavailability of PGT cookies and baverage mixture. Calcium bioavailability lies between 0.76 – 11.46%. Iron bioavailability lies between 0.92 – 5.95%. One way ANOVA test shown that types of mixture significantly affect the calcium and iron bioavailability (p<0.05). Based on Pearson correlation test result, protein have positive (+0.644) and significant (p<0.01) affection to calcium bioavailability. Furthermore, total iron have negative (-0.743) and significant (p<0.01) affection to iron bioavalability. Mixture of PGT cookies and milk have highest calcium (41,77 mg/100g) and iron (0,153 mg/100g) available. In conclusion, torbangun adding in cookies and consumption together with milk increase calcium and iron available.
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Judul: Karakteristik Bifurkasi Persamaan Schoedinger Nonlinier Kuintik Menggunakan Pendekatan Dinamika Sistem
Abstrak: Soliton merupakan gelombang soliter yang dapat mempertahankan bentuknya saat menjalar pada kecepatan konstan. Jika sebuah gelombang soliton berinteraksi dengan gelombang soliton yang lain maka keduanya akan mempertahankan profilnya masing-masing. Pada penelitian ini soliton diwakili oleh persamaan Scroedinger nonlinier kuintik (QNLS). Melalui pendekatan dinamika sistem akan digambarkan karakteristik bifurkasi persamaan QNLS. Dari hasil perhitungan diperoleh 3 titik kritis untuk (U1, U2) yaitu (-(k/σ) 1 4, 0); (0, 0); ((k/σ) 1 4, 0) harga eigen λ1,2 = ±2(k/β) 1 2 , λ1,2 = ±(-k/β) 1 2 , λ1,2 = ±2(k/β) 1 2 berturutturut untuk masing-masing titik kritis. Ketika k > 0 dan β > 0 atau k < 0 dan β < 0 diperoleh jenis titik kritis sadel, senter, sadel untuk masing-masing titik kritis. Sedangkan ketika k > 0 dan β < 0 atau k < 0 dan β > 0 diperoleh jenis titik kritis senter, sadel, senter untuk masing-masing titik kritis. Hasil ini metunjukkan bahwa sistem tidak mengalami perubahan titik kritis tetapi mengalami perubahan kestabilan pada bifurkasi persamaan QNLS.
Keyword: soliton, quintic nonlinier Schroedinger (QNLS) equation, system dynamics, bifurcation, critical points