Judul: Habitat Suitability Analysis of the Yellow-Crested  Cockatoo (Cacatua sulphurea) on Komodo Island Komodo National Park
Abstrak: Kaktua-kecil jambul-kuning merupakan salah satu satwa dilindungi yang terdapat di Pulau Komodo, Taman Nasional Komodo. Pemodelan kesesuaian habitat dapat membantu memberikan informasi spasial terkait tingkat kesesuaian dan distribusi kakatua. Penelitian ini bertujuan untuk mengidentifikasi hubungan parameter lingkungan dan tingkat kesesuaian habitat. Penelitian dilaksanakan pada tanggal 23 Februari – 9 Maret 2023 untuk mendapatkan data kehadiran kakatua dan validasi tutupan lahan. Hasil penelitian menujukkan bahwa terdapat 25 variabel yang memengaruhi pemodelan habitat dan ketinggian merupakan variabel tertinggi yang memberikan kontribusi terhadap pemodelan habitat. Pulau Komodo memiliki 1,35% luasan habitat yang sesuai bagi kakatua pada 5 lokasi berbeda yaitu Loh Liang, Loh Sebita, Loh Wau, Loh Wenci dan Loh Lawi karena kakatua memanfaatkan hutan musim dan bergerak berdasarkan ketinggian Pulau Komodo. Populasi aktual kakatua di Pulau Komodo sebesar 752 individu yang tersebar di berbagai lokasi. Diketahui bahwa kakatua-kecil jambul-kuning menyukai habitat terfragmentasi yang merupakan gabungan dari hutan musim dan savana.
Keyword: Habitat, Kakatua-kecil Jambul Kuning, Kesesuaian

Judul: Populasi dan Habitat Kakatua-Kecil Jambul-Kuning di Bentang Alam Mbeliling Bagian Barat, Kabupaten Manggarai Barat, Nusa Tenggara Timur
Abstrak: Cacatua sulphurea parvula or yellow-crested cockatoo were spread distributed at Sunda Kecil Archipelago, Nusa Tenggara, except at Sumba Island. This species amount in the nature is very small, caused by the illegal hunting and trading. The purpose of this research is to get the information about population and habitat of the cockatoo in Flores, especially at the western part of Mbeliling Landscape. Cocatoo census was conducted by look-down method at vantage points when cockatoo flew passed by. Habitat analysis was carried out with vegetation analysis. The census showed that there were two groups of cockatoo, consisted of 69 cockatoos in Tao hill and 15 cockatoos in Nggoer River. Flight pattern of each group ranged 0-100 meters above the sea level and crossed mangrove forest, savanna, monsoon forest and cultivation plant vegetation. The vegetation analysis resulted Ceiba petandra or silk-cotton tree as the tree that most used by cockatoo and had the highest TIV (Tree Importance Value), 47,48%. Cockatoo’s foods which observed were crown flower (Calotropis gigantea), and Moringa olifera. The population of Cockatoo which observed at western part of Mbeliling Landscape was estimated came from Rinca Island, Komodo National Park. It can be concluded that the location might be only used by rhe cockatoo came from Rinca Island as their daily exploration area for foraging.
Keyword: habitat., ecology, population, Flores, Cacatua sulphurea parvula

Judul: Pervaporasi Alkohol Menggunakan Membran Polistirena-SDS
Abstrak: Polystyrene (PS) membrane with SDS as porogen can be utilized as a filter in alcohol pervaporation process. The membrane was prepared using inversed phase method with PS:SDS:dichloromethane solvent composition were 17:0:83; 17:0.5:82.5; 17:1:82; 17:1.5:81.5; and 17:2:81. Homogenization of mixtures were carried out for 10 and 20 hours and casted on glass plate surface then submerged it into water with temperature of 60 °C. Pervaporation capability was evaluated from flux value and separation factor. The average of water flux values in 20 hours sonication were higher than the values in 10 hours sonication. The highest separation factor was observed in PS membrane with 0.5% SDS concentration and homogenization in 20 hours is 5.23. Application of PS membrane in pervaporation as showed by purities of alcohol value using gas chromatography method revealed that the purities increase from 91.6 to 93.4%. Therefore, certain SDS addition can increase the performance of PS membrane in alcohol purification.
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