Judul: Laju pengeringan spageti jagung pada berbagai kondisi udara pengering dan pengaruhnya terhadap mutu masak
Abstrak: Noodles and pasta drying with conventional method (dry air) has some disadvantages such as long drying time and very much influenced by weather condition. High temperature drying has been widely applied in pasta production. This method gives several advantages such as shorter drying time, increase productivity, and produce pasta with better cooking quality. In this study, corn spaghetti drying conducted at three levels of air velocity (1,29; 0,90; and 0,49 m/s), three levels of temperature setting (temperature level 6, 8, and 10), as well as two levels of drying position (vertical and horizontal towards the airflow). The cooking quality parameters being analyzed were cooking loss, elongation, and texture profile. Corn spaghetti drying using high temperature was significantly reduce drying time compared with conventional drying. Drying rate of corn spaghetti was increased when higher drying temperature used. Corn spaghetti drying rate could be represented well by the Page model thin layer drying equation. Drying position had an effect on corn spaghetti hardness when drying conducted in 1,29 m/s air velocity. While the combination of temperature and drying position had affected elongation of corn spaghetti when air velocity 0,49 m/s was used. The other drying condition were not influenced corn spaghetti cooking quality.
Keyword: Bogor Agricultural University, spaghetti cooking quality, tray dryer, corn spaghetti, Page model, thin layer drying, drying rate equation model, drying rate

Judul: Optimasi Pengeringan Benih Jagung dengan Perlakuan Prapengeringan dan Suhu Udara Pengeringan
Abstrak: Drying is an important operation in corn seed processing. Long duration of seed drying can reduce seed viability. The high moisture content causes the initiation of seed germination and increase fungal attacks, thus it will loss seed viability. Long duration of seed drying also decreases production capacity and will increase production cost. One of the efforts to increase drying rate is increase air drying temperature. But, the high temperature in seed drying will give risk. It will give effect on chemical composition destruction so it could be decline seed viability. Maintaining seed viability could be done by using predrying treatment. Predrying was done by blowing air using blower machine and it applied before ear corn dried with heated air. Combination between predrying and air drying temperature were the effective treatment to increase drying rate and maintain corn seed viability. The objectives of the research were to increase corn seed drying efficency by develop design of drying system and combine between predrying treatment with air drying temperature to get maximum seed quality. This research was conducted at PT BISI International, Tbk. on June till October 2012. This research consisted of three phases, 1. Drying system design, 2. Corn seed drying optimization, and 3. Economic analysis. The first research consisted of two phases, 1. Mini box dryer assembling, and 2. Mini box dryer testing. Corn seed drying optimization consisted of periods of predrying (0, 12, 24, and 36 hours) and temperature level factor (40, 45, 50, and 55 °C), used randomized complete block design with three replications. Physical and physiological quality were analyzed to find treatment which produced good seeds. Economic analysis were used to find treatment which give highest of B/C Ratio. The result showed that predrying during 36 hours on temperature setting 50 °C was the optimum treatment for corn seed drying, because it had good germination and had highest B/C Ratio.
Keyword: 

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.
Keyword: