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.
Keyword: 

Judul: Reformulasi Mikroenkapsulasi Minyak Sawit dengan Teknik Koaservasi, Pengeringan Lapis Tipis, dan Penyerapan SiO2
Abstrak: Cases of vitamin A deficiency (VAD) are often found in Indonesia. On the other hand, Indonesia is the largest palm oil producer in the world. The content of β-carotene, which is a provitamin A, in palm oil is relatively high, so that it has a great potential for overcoming cases of VAD. By microencapsulation process of palm oil, β-carotene content in palm oil will be more stable and have a longer shelf life. There are three methods used in this study, namely coacervation, thin-layer drying, and SiO2 absorption technique – teoretically they are suitable for encapsulating β-carotene in palm oil. Results of ANOVA test at 5% significance level showed that the differences in methods significantly affect water absorption, solubility in water, yield, efficiency, and the β-carotene content and retention of microencapsulate. The microencapsulate made by thin-layer drying method had the highest levels of β-carotene at 200.16 ppm with retention 68.89%. It also had low water absorption and high water solubility so that it can be applied as a premix.
Keyword: 

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