Judul: Kajian Pola Penyerapan Etilen dan Oksigen untuk Penyimpanan Buah Segar
Abstrak: Most fruits are still doing respiration even after been harvested. Respiration causes ripening of the fruit and at the end will causes wilting and rotting them. There are several things that influences Respiration Quote including ethylene and oxygen gas. The ethylene and oxygen gas will increase Respiration Quote and causes the damaging of fruit and at the end will decrease its storage time. Postharvest treatments carried out in order to maintain the quality of fresh fruit. One of the treatments that can be used is potassium permanganate as ethylene scavenger and ascorbic acid as oxygen scavenger. The objectives of this study were to determine the effectiveness of ethylene and oxygen scavenger, the effect of airflow and to learn model of ethylene and oxygen adsorption. Potassium permanganate (KMnO4) and ascorbic acid (C6H8O6) which used in this study were KMnO4 75%, KMnO4 10%, C6H8O6 40%, and C6H8O6 60%. Each of the salute was adsorpted by activated carbon as adsorption media. In addition, 700 rpm and 1800 rpm velocity of fan were applied in each KMnO4 and C6H8O6 combination. The using of velocity fan produced 0.159 m3/s and 0.408 m3/s volumetric airflow. Based on research, R1K1A2 (1800 rpm, KMnO4 75%, C6H8O6 60%) showed best result because it was able to decrease ethylene up to 121.40233 ppm in second hour measurement and there was not any ethylene measured at the next hour measurements. In oxygen measurement, the best behavior wos R2K1A2 (700rpm, KMnO4 75%, C6H8O6 60%) because it was able to decrease oxygen up to 20.5% while others were only reach 20.6%. Model of ethylene adsorption follows quadratic polynomial equation: E(t) = 0.0426 - 0.0127t+0.0009t2, E(t) is ethylene adsorption rate (ml/gram/hour) and t is time in hour. Model of oxygen adsorption follows linier equation, E(t) = 21.02 – 0.0158t, E(t) is oxygen concentration (%) and t is time in hour.
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Judul: Mempelajari Efektivitas Sistem Penyerap Etilen dengan Kalium Permangatan (KMnO4) dan Pengaruhnya terhadap Konsentrasi CO2 pada Penyimpanan Buah Segar
Abstrak: Buah-buahan mempunyai potensi untuk dikembangkan sebagai komoditi ekspor dan domestik baik dalam bentuk segar maupwl dalam bentuk olahan. Buahbuahan dikonsumsi karena merupakan sumber vitamin, mineral, protein, karbohidrat dan energi yang dalam tubuh berfungsi sebagai pengatur metabolisme tubuh. Umur simpan buah-buahan pada umunmya relatif pendek, sehingga menjadi kendala dalam penyediaannya sebagai konsumsi buah segar. Oleh karena itu perlu diteliti bagaimana cam memperpanjang umur simpan dari buah-buahan terse but. Cara yang biasa dilakukan untuk memperpanjang umur simpan buah segar diantaranya adalah dengan menyerap etilen yang dihasilkan, perlakuan suhu dan pengemasan yang pada prinsipnya dapat memperlambat laju respirasi dari buahbuahan selama proses kemasakan.
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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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