Judul: Stabilisasi Tepung Bekatul Melalui Metode Pengukusan Dan Pengeringan Rak Serta Pendugaan Umur Simpannya
Abstrak: Bran is side product from rice milling. According to BPS (2008), bran production reach at 4,8 million tons. Bran can be processed to be various product, one of them is bran powder. Bran powder can be used as brade substitution agent, cookies, and dietary drink. The decreasing of quality of bran can occure through hydroliytic and oxidation processes. The problem can be solved trough bran stabilization. It can be processed by steaming of the material in certain time. The purposes of this research are to get condition of stabilization and bran drying, bran characterization and stabilized bran, also to predict the packaging time. Constant condition of drying of the fresh bran reached in 4 hours with the drying rate about 1 x 10-4 g/second untill the water level at 5 %. Steaming of the bran was carried out in 3 level of time; 5, 10, and 15 minutes. The next step was characterizing the bran and stabilized bran. The characterization of fresh bran include water level 6,86 %, fat 16,84 % (db), ash 7,43 % (db), protein 13,72 % (db), crude fiber 7,25 % (db), carbohydrate by different 47,9 % (db), and TBA 0,68 mg malonaldehid/kg sample, solubility 11,95 %, swelling power 5,96 %, cyneresis 95,50 %, total colony number 1,65 x 106, and was not found E. Coli colony. Based on tested parameter water level, fat, and TBA were choosen bran with steaming at 5 minutes. The stabilized bran characterization include water level 5,61 %, fat 14,23 % (db), and TBA 0,23 mg malonaldehid/kg sample. The bran that was stabilized at 5 minutes was used as the material to predict the storage and shelf life. The product packed in metalizzed and was storaged at tempeature 35, 45, and 50oC during 8 weeks. The quality parameter that was used in were water level, TBA, and brightness level. During the storage, it occured decreasing of water level and brightness level, also the increasing of TBA value. The critical value of the quality parameter that was used in packaging time of stabilized bran was TBA. Based on organoleptic test at the 4th week at storage 50oC, the critical point was 0,51 mg malonaldehid/kg sample. Arrhenius equation of stabilized bran during the packaging was k = 0,074 e -176 (1/T). Packaging time of stabilized bran at 30oC was predicted in 39 days, at temperature 25oC was in 40 days, and at temprature at 15oC was in 50 days.
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Judul: Pengawetan Bekatul Dengan Perlakuan Fisik : Pemanasan Menggunakan Drum Drier, Ekstruder, Penyangraian, Pengukusan dan Autoclave
Abstrak: Rice bran is by product of rice milling industry which have the high potential for expanded. To get the fresh rice bran is difficult, so we need initiative to content that problem. The objective this research is to looking for the exact method for finding preservative rice bran and to determine the shelf life of rice bran with conventional method and arrhenius accelerated method. Heat treatment in this research is drum drier, extruder, roasting, steaming and autoclave. The best heat treatment is heating the rice bran with drum drier at 120°C during 5 minutes. The shelf life of rice bran in this treatment is 145 days (conventional method) and 122 days (accelerated method) be based on measurement TBA value, and 40 days (conventional method) and 44 days (accelerated method) be based on the sensory test. The nutritive value of preservative rice bran is 12.19 % water, 7,07 % ash, 14,19 % protein, 16,67 %fat, 8,76 %fiber and 41,12 % carbohydrate.
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Judul: Posisi Filogenetik Kura-Kura Carettochelys Insculpta  (Reptillia: Testudinata)
Abstrak: Carettochelys insculpta is an endemic freshwater turtle of southern Papua and northern Australia. Phylogenetic position of this turtle is remain unresolved until now. Most of the research conducted show close relationships of C. insculpta and members of Trionychidae family. However, some of the research show distance between C. insculpta and members of Trionychidae family. This research is conducted to analyze phylogenetic relationship between C. insculpta and other members of Testudinata using 12S rRNA, 16S rRNA, and both gene as markers. DNA samples were obtained from three different organisms of C. insculpta. Two species used as outgroups were Alligator mississippiensis and Iguana iguana. Phylogenetic analysis was carried out using Neighbor-Joining method with Felsenstein 1981 (F81) modeltest. A polytomy tree of Testudinata was produced by using 12S rRNA gene. However, analysis using 16S rRNA and both genes as markers confirmed that C. insculpta was located between the Chelonidae and the Trionychidae family.
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