Judul: Pengaruh variasi kelas umur terhadap luas wilayah jelajah harian komodo(Varanus komodoensis Ouwens) di Pulau Rinca, Taman Nasional Komodo
Abstrak: Komodo (Varanus komodoensis) merupakan reptilia langka endemik yang hanya terdapat di Indonesia, yaitu di Pulau Komodo, Rinca dan Flores. Selain endemik, komodo juga mempunyai keistimewaan yang lain yaitu ukuran badannya yang lebih besar dari jenis biawak lain. Pengetahuan mengenai wilayah jelajah sangat penting bagi pengelolaan satwaliar, terutama untuk mengetahui luas ruang yang dibutuhkan oleh satwaliar dalam memenuhi kebutuhan hidup dan usahanya untuk bertahan hidup. Tujuan penelitian ini adalah untuk mengetahui luas dan karakteristik wilayah jelajah harian komodo menurut kelas umur. Hasil dari penelitian ini diharapkan dapat bermanfaat bagi pengelolaan dan pelestarian komodo baik secara in-situ maupun eks-situ dan melengkapi data mengenai bioekologi komodo. Penelitian ini dilakukan selama lebih kurang 2,5 bulan, di Pulau Rinca Taman Nasional Komodo, Nusa Tenggara Timur. Alat yang digunakan antara lain binokuler, kompas, peta, protractor, meteran, alat pencatat waktu, planimeter dan alat tulis. Pengamatan dilakukan dengan metode Focal Animal Sampling (pengamatan perilaku pada individu tertentu) dari pukul 06.00 WITA sampai 18.00 WITA. Kelas umur yang dipakai adalah muda panjang tubuh < 1 m), dewasa (panjang tubuh 1 2 m) dan tua (panjang tubuh > 2 m). Parameter pergerakan yang dicatat antara lain panjang lintasan harian (Daily Range), pergeseran posisi tidur (Night Position Shift), dan radius maksimum (Maximum Radius). Selain parameter pergerakan dilakukan juga pengamatan terhadap komponen habitat seperti air, vegetasi dan satwa mangsa di sekitar lokasi penjelajahan, serta aktivitas harian komodo. ...
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Judul: Studi Pola Penggunaan Ruang Berbagai Kelas Umur Biawak Komodo (Varanus Komodoensis Ouwens) Di Loh Buaya-Pulau Rinca Taman Nasional Komodo, Nusa Tenggara Timur
Abstrak: Komodo represent totally disappeared threatened giant salamander. The existence of this endemic reptile only gone in the round of Komodo National Park (KNP) that is in Komodo Island, Rinca Island, Gili Motang, Nusa Code (Jessop et al., 2007) and minor partly in north and west of Flores Island (Erdmann, 2004). Differ from research about population or inventory Komodo have become routine activity side organizer KNP, still a lot of ecology aspect from Komodo which still have to be checked specially about habitat interaction in KNP area, and also spatial ecology (home range and movement). The aim of this research area to identify activity type of komodo according to vegetation type and to know it’s home range and daily path length. Methodology of this research were used Focal animal sampling method and Continous recording method. the registry of Komodo position with Absolute positioning method by using GPS receiver at the time of Komodo do activity at certain dot. Monitoring done pursuant to variation of age class (whelp, juvenile and adult) with each five multiply repetition. Mangrove and savannah used by whelp and adult especially to exploring areas, while the juvenile especially to perceive. In monsoon forest, most activity often done by whelp and juvenile is exploring areas, while adult more amount perceiving. Whelp, juvenile and adult often use savannah as place to activity than monsoon forest and mangrove. The highest savannah used time percentage that is in whelp class. All class age of Komodo use the more amount time to rest, but if seen from age old class, juvenile which at longest rest. Furthermost path length is whelp with average thread 1659,954 ± 628,732 m, later then adult as far as 1427,227 ± 1121,776 m and juvenile as far as 820,460 ± 391,288 m. Whelp take possession of highest home range sequence broadly 12,104 ± 8,227 ha, later then adult Komodo and juvenile broadly 9,383 ± 9,805 ha and 3,412 ± 2,048 ha. Komodo in Loh Buaya use three vegetation type (savannah, monsoon forest and mangrove) as it’s habitat. There are relation between activity type with vegetation type posed at with the result chi-kuadrat test (χ ²) at real level 0,005 with value χ ²aritmetic > χ ² table = 71,133 > 25,188. Komodo very like savannah and most daily activity type often done is rest. The highest home range and daily path length that is in juvenile. Keywords : Komodo, Age Class, Space Use, Home Range, Komodo National Park
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Judul: Katalis Eterifikasi Gliserol Berbasis Poli–(asam stirena sulfonat) dari Limbah Styrofoam.
Abstrak: Styrofoam waste can be converted to poly–(sulfonate styrene acid) (PSSA) that can be used as catalyst. The objective of this research is to get PSSA that can catalyze the etherification of glycerol and benzyl alcohol. The styrofoam waste was converted to PSSA by reacting with H2SO4 98% (as sulfonation agent) and P2O5 (as sulfonation catalyst) at 40 °C for 6 hours. Characterizations of PSSA included functional groups, sulfonation levels, water swelling, and thermal stability. The yield of PSSA was 40-55%. The success of sulfonated polystyrene was shown by –SO3H group absorption at 1157.29 cm-1. Etherification of glycerol and benzyl alcohol using PSSA catalyst was conducted at 110 °C for 12 hours. The conversion in producing mono–benzyl ether glycerol was 8.10%, 1,3–dibenzyletherglycerol 2.60%, and dibenzyl ether 9.80%. Therefore, the PSSA can be used as etherification catalyst.
Keyword: benzyl alcohol, etherification, glycerol, polystyrene, PSSA