Judul: Analisis Komposisi Minyak Atsiri Fuli dan Biji Pala Papua (Myristica argentea Warb) dengan GC-MS
Abstrak: Papuan nutmeg (Myristica argentea Warb) is native to Papua Island that has been an export commodity but has not been diversified into various products optimally. Seed and mace of Nutmeg are exported in the whole form. This research aim to analyze essential oil composition of seed and mace of Papuan nutmeg. However, moisture and fat content were also analyzed since they were major components in nutmeg. Moisture content was analyzed by azeotropic distillation method and fat content was analyzed by Soxhlet’s method. Essential oil was extracted using Likens-Nickerson method (Simultaneous Distillation Extraction). The results showed that moisture content of M argentea Warb at the age of four month were 74.84 % and 26.71 % in seed and mace, respectively. Moisture content of M argentea Warb at the age of eight month were 19.25 % and 19.30 % in seed and mace, respectively. Fat content of M argentea Warb at the age of four month were 19.83 % and 27.31 % in seed and mace respectively. Fat content of M argentea Warb at the age of eight month were 23.47 % and 21.08 % in seed and mace, respectively. The essential oil of M argentea Warb at the age of four month were 9.22 % and 6.78 % in seed and mace respectively, while at the age of eight month were 3.04 % and 3.33 % in seed and mace respectively.
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Judul: Kajian Pengaruh Proses Perendaman dan Lama Penyimpanan Biji Pala (Myristica fragrans HOUTT) Terhadap Rendemen dan Kualitas Minyak Pala
Abstrak: Nutmeg oil is one of export comodities that highly contribute to national income. Because of that, it is understandable that the industry competition level is high. Different products made from nutmeg require different postharvest processes. This study aims to determine the yield and quality of nutmeg oil, and also the loss of weights obtained during storage at several soaking treatment and storage period of seed nutmeg. The method of the post-harvest handling of nutmeg involves to three types of treatment, which are: (1) without soaking, (2) soaking in fresh water, and (3) soaking in salt salution. After that, nutmegs were given three types of treatment of storage period, which were 1 week, 2 weeks, and 3 weeks. The highest yield of nutmeg oil obtained from the treatment that was without soaking, with an average of 13 %, followed by treatment of soaking in fresh water an average 12.94 %, and then from the treatment of soaking in salt salution an average 11.05 %. Optimal storage period’s nutmeg seed was 1 week because the nutmeg did not loss their weight. Nutmeg oil produced in accordance with national standards of the average value of specific weight ranged from 0.89 to 0.92. The value of refractive index ranged from 1.47 to 1.48, while its value of optical rotation ranged from (+) 6.18o to (+) 25.62o, and the solubility in alcohol 90% was found 1.00 - 1.34.
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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