Judul: Pemekatan vitamin minyak sawit dalam isopropanol dengan menggunakan evaporator vakum berputar
Abstrak: Vitamin deliciency is a disease where the whole body lacks of vitamin. The deficiency of vitamin A is the principal problem that descend upon the Indonesian children. The data of Department of I-Iealth years 2003 stated that 10 million of I~ldonesian children (n~onth 6 until year 5) experienced of vitamin deficiency. These amount were a half or 50 percent from the whole population of the children under five in Indonesia. Fortification is a solution to overcollie vitamin A deficiency, because of fortification, the contents of vitamin A from the foods could be higher. So, somebody needs would have fullfilled. Vitamin A could be made by the body itself by the existence of karotenoid substance. The most source of ltarotenoid is from palm oil with the amount of karotenoid is about 500 ppm and vitamin E is about 600-1 000 ppm. The bleaching proses on thc oil's production brolte niinor component like betaltaroten and alfatokofcrol indirectly. These process was done because the consumer didn't reddish of oil from tlie coloured pigment. The vitaillin separation process on palm oil is done by using tlie EVB, where the palm oil is made thick. EVB was chosen beca~~osfe its ability in steam the liquids under the atmosphere pressure (vacuum). So, that the liquids that can't be easier get degradation on the high temperature is like vitamin.
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Judul: Retensi Vitamin A dan β-karoten Minyak Sawit yang Difortifikasi Selama Penggorengan
Abstrak: Palm oil can be a good carrier of the vitamin A fortification due to its stability and its wide cooking application, so its consumption contributes to community’s nutrition. The objective of this research is to get information about the effect of fortificants to retention of vitamin A and β-carotene in fortified palm oils. Four palm oils used in this research were palm oil fortified with β-karoten from red palm olein (RPO) 47.08 IU/g, fortified with vitamin A 59.69 IU/g, fortified with combination A (30 IU RPO, 15 IU vitamin A) 45.64 IU/g and fortified with combination B (15 IU RPO, 30 IU vitamin A) 45.95 IU/g. Fortified oils were used to fry tofu by three replicated shallow frying and to stir-fry sprouts. The result showed that the retention of fortificants decreased by frying replication. In the first day of frying, the retention of fortificants were not significanly different (p=0.05), in a range 85.52%-88.22%. In the second and third frying, it was known that β-karoten had lower stability than vitamin A as fortificant. Fortificant combination A and B had the same stability. The peroxide value of the oils increased until the second frying, then decreased in the third frying. The free fatty acid (FFA) percentage increased minimally, except palm oil fortified with vitamin A, the FFA remained same. The highest yield of fortificant in cooked sprouts was vitamin A (63.37%), followed by combination B (53.42%), combination A (50.60%), and RPO (34.86%).
Keyword: vitamin A, retention, red palm olein, fortification, β-carotene

Judul: Closed Knight’s Tour pada Papan Catur Berbentuk Persegi Panjang dengan Ukuran Maksimal 8 × 8
Abstrak: Closed Knight’s Tour merupakan langkah kuda yang mengunjungi setiap kotak pada papan catur tepat satu kali dengan langkah kuda berawal dan berakhir pada kotak yang sama. Graf yang terbentuk dari closed knight’s tour dinotasikan sebagai graf G(m,n), dengan m adalah banyaknya baris dan n adalah banyaknya kolom. Graf tersebut memuat Hamiltonian cycle. Sebuah graf terhubung G adalah graf bipartite jika dan hanya jika graf tersebut tidak memiliki cycle dengan panjang ganjil. Papan catur yang memenuhi syarat cukup untuk memiliki closed knight’s tour adalah papan catur berukuran 5 × 6, 5 × 8, 6 × 6, 6 × 7, 6 × 8, 7 × 8, dan 8 × 8.
Keyword: bipartite, closed knight’s tour, hamiltonian cycle, knight’s tour, teori graf