Judul: Karakteristik Pemanasan Pada Proses Pengalengan Manisan Pala Basah (Myristica fragrans Houtt)
Abstrak: Nutmeg plant is a native plant of Indonesia, which is already well known as spice crop since the 18th century. One of the technology applications that utilize nutmeg meat is to alter them into canned sweet nutmeg. The purpose of this research is to determine the optimum heating period to study the heat penetration parameters during sterilization process and to determine the cold point of canned sweet nutmeg. The determination of distribution and heat penetration conducted using thermocouples that put at the vertical axis of the can with a distance of 1/3, 5/12, and 1/2 of the height that measured from the base of can. Tthe data show that posision at 5/12 is the coldest point, with the optimum heating period is 14.71 minutes. Thermal process of sweet nutmeg caused decrease of hardness and total dissolved solid and increase of pH and weight. However with the thermal process that being applied, the total microbe on the sweet nutmeg meat will be dropped to the safe to be consumed
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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