Judul: Penggunaan Kalium Permanganat sebagai Oksidan Etilen untuk Memperpanjang Daya Simpan Pisang Raja Bulu
Abstrak: Banana is a climacteric fruit which has an advance rate of respiration. The increasing of respiration rate in the ripening process is triggered by emission of ethylene in autocatalytic. The respiration rate of the banana can be inhibited by deactivated the ethylene using chemical treatments, such as KMnO4. The aim of this study are to study the inhibition of Raja Bulu banana respiration rate during storage using KMnO4 and have KMnO4 concentration to extend the shelf-life of Raja Bulu banana. This study was conducted during a month since from February until March 2013 at Postharvest Laboratory, Department of Agronomy and Horticulture, Faculty of Agriculture, Bogor Agricultural University. The experimental design was arranged in a randomized complete block design with 4 treatments and 5 replications, which were KMnO4 7.5%, 15%, 22.5%, and control (without KMnO4). Collected data was analyzed using F test method and if the treatments result showed a significantly affect was analyzed by Duncan Multiple Range Test (DMRT) test method. Parameters measured was the respiration rate, peel color index, shelf-life, weight reduction, edible part, rind firmness, total soluble solids, total titratable acids, and vitamin C. The results showed that the use KMnO4 of 7.5%, 15%, and 22.5% can inhibited the respiration rate of banana during storage so that suspend the peak of the climacteric Raja Bulu banana 1-2 days compared to control. The use KMnO4 of 7.5%, 15%, and 22.5% was not affect the quality of the physical and chemical of Raja Bulu banana
Keyword: ripening, respiration rate, postharvest, climacteric

Judul: Kalium Permanganat Sebagai Penyerap Etilen Untuk Memperpanjang Umur Simpan Pisang Raja Bulu
Abstrak: Pisang temasuk buah klimakterik, dimana selama proses ini terjadi serangkaian perubahan biologis yang diawali dengan proses pembentukan etilen. Pembentukan etilen menyebabkan terjadinya proses pematangan pada pisang. Namun, proses pematangan dapat menyebabkan menurunnya kualitas pisang jika disimpan dalam jangka waktu yang lama. Proses pematangan dapat ditunda dengan menggunakan bahan penyerap etilen yaitu KMnO4. Kalium permanganat dapat ditambahkan dengan silika gel sehingga mampu menyerap etilen dan uap air pada pisang. Tujuan penelitian ini adalah untuk mengetahui pengaruh bahan penyerap etilen yang terbuat dari campuran kalium permanganat dan silika gel terhadap umur simpan pisang. Pengujian yang dilakukan antara lain susut bobot, uji warna, total padatan terlarut (TPT),edible part, dan kadar vitamin C. Umur simpan pisang raja bulu tanpa penambahan KMnO4 mengalami kerusakan pada hari ke-6 penyimpanan. Konsentrasi KMnO4 sebanyak 0.25 g dan 1.25 g dengan kemasan berlubang mampu memperpanjang umur simpan pisang raja bulu selama 8 hari penyimpanan.
Keyword: Banana, ethylene absorbent, potassium permanganate

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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