Ardhana Yulisma
Universitas Syiah Kuala

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PENGARUH KONSENTRASI KITOSAN DAN LAMA PENYIMPANAN TERHADAP TOTAL PLATE COUNT (TPC) BAKTERI PADA IKAN KEMBUNG (Rastrelliger sp.) ASIN Yulisma, Ardhana; Yulvizar, Cut; Rudi, Edi
Jurnal Biologi Edukasi Vol 4, No 2 (2012): Jurnal Biologi Edukasi
Publisher : Jurnal Biologi Edukasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (69.628 KB)

Abstract

This research studied the application of chitosan on salted mackerel (Rastrelliger sp.) preservation during storage at room temperature. The research is aimed to study the effect chitosan concentration and storage time for Total Plate Count (TPC). The study was conducted in Laboratory of Microbiology, Faculty of Mathematics and Natural Sciences, Syiah Kuala University from April to August 2012. The research method was laboratory experimental.  The data was analyzed by Randomized Completely Design with two factorial. The first factor was chitosan concentration (three levels: 0%; 1%; 2%) while the second factor was storage time (four levels: 0; 2; 4; 8 weeks). The results of this study indicated that chitosan concentration was not significantly different for the Total Plate Count (p>0,05), however storage time was significantly for the Total Plate Count (p<0,05). Futhermore, the interaction chitosan concentration and storage time was significantly for the Total Plate Count (p<0,05).
PHYLOGENETIC RELATIONSHIPS WITHIN FAMILIES MYRTACEAE IN TRIPA PEAT SWAMP FOREST USING INTERNAL TRANSCRIBED SPACER (ITS) Yulisma, Ardhana; Thomy, Zairin; Harnelly, Essy
Jurnal Natural Volume 18, Number 2, June 2018
Publisher : Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1130.181 KB) | DOI: 10.24815/jn.v18i2.10105

Abstract

The Tripa peat swamp forest is located on the west coast of Aceh province and falls administratively under the two districts of Nagan Raya and Aceh Barat Daya. Tripa peat swamp forest has a high diversity of plants. The previous research discovered that Myrtaceae is one of the dominant families in the forest. This study aimed to predict phylogenetic relationships among trees species within families Myrtaceae that live in the Tripa peat swamp forest using Internal Transcribed Spacer (ITS). The research was conducted at Laboratory of Forest Genetics and Molecular Forestry, Faculty of Forestry, IPB from June 2015 to December 2016. The methods were conducted with an experimental laboratory of molecular identification consisting of DNA extraction, amplification, and sequencing. Data was analyze using BioEdit, Clustal X, Mega 6, and BLAST. The morphology identification reported that there were four trees species within families Myrtaceae, i.e., Syzygium sp 1, Syzygium garciniifolium, Syzygium leptostemon and Tristaniopsis whiteana. Reconstruction of phylogenetic tree using the Neighbor-Joining (NJ) method 1000x showed that the ITS region was successfully to predict phylogenetic relationships within genus Syzygium and Tristaniopsis.Keywords: tripa peat swamp forest, tree species, phylogenetic, myrtaceae, internal transcribed spacer