Judul: Komunitas Burung pada Beberapa Habitat dengan Gangguan Berbeda di Hutan Lambusango, Pulau Buton, Sulawesi Tenggara
Abstrak: Habitat changes due to past disturbances may affect bird communities in Lambusango forest. This research is aimed at examining bird diversity, and comparing bird composition in several habitats with different disturbance levels. The study shows an increasing number of species, population and diversity index (H') from habitats with low to high disturbance level. Birds in primary and secondary forests have the similarity level of 77%. The composition of specialist birds differs from one habitat to another. Primary forest becomes the habitat of two types of interior birds that can be used as an indicator for undisturbance habitats, those are White-bellied Imperial Pigeon (Ducula forsteni) and Sulawesi Dwarf Kingfisher (Ceyx fallax).
Keyword: lambusango forest, habitat disturbance, bird communities

Judul: Analisis Guild Burung di Beberapa Tipe Habitat di Hutan Lambusango, Pulau Buton, Sulawesi Tenggara
Abstrak: The existence of a guild can be used as the indicator of habitat change. The objective of this research is to identify guild composition and analyze factors that influence guild diversity in primary forest, secondary forest, and mix plantation. This research was conducted on July, 4th-31st in primary forest, secondary forest, and mix plantation in Lambusango forest. The result shows that secondary forest holds the highest guild composition although there was no big difference in the number of guild among the three habitat types. Insectivores always dominate guild composition in every habitat types. It might be influenced by the stability and availability of the insect population throughout the year. Frugivore is the next dominance guild in every habitat type. Middle and upper canopy are the dominant substrate used by insectivore and frugivore. Sally is the dominant behavior type that frequently used by insectivore while glean and reach is the dominant behavior that frequently used by frugivore.
Keyword: Lambusango forest, habitat, Guild

Judul: Imobilisasi Metformin Hidroklorida pada Hidrogel Poli(Vinil Alkohol) (PVA) dengan Teknik Iradiasi.
Abstrak: Hidrogel dikenal sebagai salah satu jenis makromolekul polimer hidrofilik berbentuk jaringan bertaut silang yang banyak digunakan dalam matriks pengungkung/pelepas obat. Hidrogel dibuat dengan proses beku-leleh dan iradiasi gamma. Campuran poli(vinil) alkohol 10% (b/v) dalam air yang mengandung metformin HCl (10, 20, 30 mg) dibeku-lelehkan kemudian diiradiasi dengan sinar gamma (0, 10, 15, 20 kGy). Hidrogel yang terbentuk dikarakterisasi menggunakan spektroskopi Fourier transform infrared. Pelepasan metformin HCl dari hidrogel diukur dengan spektrofotometer UV-Vis. Fraksi gel dan daya serap air dihitung pada hidrogel yang tidak tercampur obat. Hidrogel tanpa iradiasi dan hidrogel hasil iradiasi memperlihatkan pergeseran bilangan gelombang pada gugus -OH dan -CH. Kinetika pelepasan obat dari hidrogel diukur berdasarkan persamaan orde nol. Fraksi gel yang diperoleh memiliki rataan 97-98%. Jumlah air yang diserap oleh hidrogel semakin berkurang dengan bertambahnya dosis iradiasi.
Keyword: hidrogel, imobilisasi, iradiasi, metformin HCl, PVA