Judul: Efektivitas Penggunaan Zeolit Dan Bawang Putih Sebagai Zat Penghambat Kerusakan Biologi Pada Jagung Dan Dedak Padi Selama Proses Penyimpanan
Abstrak: The aim of this experiment was to compare the effectiveness of zeolite and garlic as a preventive biological damage caused by insect and mold during the storage of rice bran and corn. The experiment used a complete randomized design, with the factorial model 5 x 4 and 3 replication resepectively. The treatments were P0 (Corn or Rice Bran), P1 (P0 + 1% Zeolite), P2 (P0 + 1% Garlic) and P3 (P0 + 0.15% anti mold commercial). The experiment was conducted for 8 weeks. Variable observed were temperature and humidity, moisture, water activity, total of mold, total and kind of insect. The data were analyzed by Analysis of Variance, and differences among treatments were examined with Duncan (Least Significant Difference). The results showed that the addition of garlic and zeolit at rice bran significantly (P<0.05) decreased total of mold in the sixth week of storage. The commercial anti-mold at rice bran significantly (P<0.05) increased total insect in the eight th week of storage. It is added 1% zeolite and 1% garlic is effective to prevent biological damage caused mold growht at rice bran during storage process and couldn’t effective to corn.
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Judul: Efektivitas Penggunaan Bawang Putih dan  Zeolit sebagai Penghambat Kerusakan  Fisik pada Jagung dan Dedak Padi  selama Proses Penyimpanan
Abstrak: The objective of this experiment was to study the effect additive of garlic and zeolite addition on physical damage of corn and rice bran during 8 weeks storage process. This experiment used a completely randomized factorial design (5x4x3), with faktor A was storage periods (0,2,4,6,8 weeks) and faktor B was additive addition (4). The treatments were P0 (corn/rice bran), P1 (P0 + zeolit (1%)), P2 (P0 + garlic (1%)), P3 (P0 + commercial anti mold (0,15%)). The experiment was conducted for 8 weeks and analysed at 0,2,4,6,and 8 weeks of storege periods. Variables observed were moisture, water activity, bulk density, compacted bulk density, energy float, and angle of repose. The data were analysed using Analysis of Variance and the significant result was examined by Duncan’s New Multiple Range. Temperature and humidity during experiment were 27.580 C and 83.79% respectively. The storage periods significantly (P<0.05) increased moisture content (5-7%) and water activity (2.7-8.1%) at rice bran and corn. The addition of additive also decreased energy float (12.4-62.7%), angle of ripose (2.32-6.45), bulk density (6.9-27.9%), and compact bulk density (2.4-9.75%). There was interaction between storage periodes and additive on moisture, angle of ripose and energy float of rice bran, and also on water activity and compact bulk density of corn. In conclusion the addition of zeolit is effective to prevent physical damage in term of keeping moisture content, angle of ripose, energy float for rice bran and compact bulk density for corn, but addition of garlic was not effective to prevent physical damage in corn and rice bran during storage.
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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