Judul: The application of bentonite-zeolite in increased quality of vetiver oil the result of destillate at Garut regency.
Abstrak: Vetiver oil is one of essential oils type which has been produced commercially and recognized in international market wich is one of deodorant material applied widely at cosmetic manufactures, perfume, and as component of soap deodorant. In this research, we adsorbed vetiver oil pollutant bentonite, zeolite, and their mixtures at concentration of 2 % (w/v) to determine the best of adsorbent application in increasing quality of the vetiver oil. Quality standard applied was Indonesia National Standard number 06-2386-2006 for vetiver oil. The yield of vetiverol by using bentonite was adsorbent 61,14 %, by zeolite was 68,42 %, by mixture 0,04 (b/z) was 66,48 %, and by mixture 0,05 (b/z) was 66,41 %. Based on the results, zeolite can give higher purification of vetiverol of increase vetiver oil quality.
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Judul: Kajian pemanfaatan tepung akar wangi untuk pembuatan dupa aromaterapi
Abstrak: Agroindustry is an enterprise that processes agriculture products to result in high value added products. Vetiveria Zizanoides is the name of plant with roots containing smelly product volatile oil fragrant (woody) suitable to make aromateraphy product. The purposes of this research were to develop the best formula of incense aromateraphy with powdered roots of Vetiveria Zizanoides as the base material and characterize the products based on it burning time, hardness level, water content and preference test. This research was designed with factorial model of experimentaion with 3 factor type of gum (starch, dekstrin, and molases), concentration of gum (3%,4%,5%) and insence form (cone and stick). The best formulation of this insence aroinateraphy based on pre-research is product was contained of 55% of coconut shell charcoal, 10% incense powder and 35% Vetiveria Zizanoides root powder. Vetiveria Zizanoides root powder is the most influence factor. It is can reduce the level burning time of product because it is content level ash reach 25.25%. Concentrations of gum that used in this reserach based on pre-research are 3%, 4% and 5%. If the concentration of gum less than 3%, it will make the product rigid and the product will be unformed if the concentration more than 5%. The best incense aroinateraphy formula based on the hardness level is incense aromateraphy which has stick form with 4% concentration of starch. The best formula for the water content level is incense aromateraphy which has stick form with 4% concentration of molases. The best formula for the burning time level is incense aromateraphy which has stick form with 5% concentration of starch. Based on organoleptic test (kruskal-wallis method), factors in this research didn't give influence to the level of fragrant, form and shape of product. The most favourite incense aromateraphy based on mean rank test for level of fragrant is incense aroinateraphy which has stick form with 5% concentration of starch.
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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