Judul: Produksi Biohidrogel Berbasis Carboxymenthyl Starch-Kitosan Menggunakan Iradiasi Sinar Gamma.
Abstrak: Hidrogel merupakan struktur tiga dimensi, bersifat hidrofilik dan memiliki jaringan polimer yang dapat menyerap dan mempertahankan air dalam jumlah banyak. Metode preparasi hidrogel dapat dilakukan dengan physical crosslinking menggunakan 60Co gamma radiation sebagai sumber inisiator dan crosslinking. Penelitian ini bertujuan menganalisis pengaruh variasi laju dosis iradiasi sinar gamma (10 kGy, 15 kGy, dan 20 kGy) pada suhu ruang terhadap parameter grafting dan karakteristik biohidrogel yang dihasilkan dari carboxymethyl starch sagu dan tapioka. Kopolimer dan crosslinking agent yang digunakan adalah kitosan dan asam metakrilat. Keberhasilan proses grafting ditunjukkan dengan terbentuknya ikatan silang antara carboxymethyl starch dengan kitosan, tetapi pada dosis iradiasi tertinggi menyebabkan terjadi depolimerisasi terbatas pada gugus pati. Hasil parameter grafting (rendemen, efisiensi, dan konversi monomer) dan karakteristik biohidrogel (fraksi gel, kelarutan, swelling power, dan daya serap air) terbaik diperoleh dari perlakuan dose rate 10 kGy. Akan tetapi, hasil terbaik daya serap minyak biohidrogel sagu dan tapioka masing-masing dihasilkan pada dose rate 20 kGy dan 15 kGy.
Keyword: biohidrogel, carboxymethyl starch, iradiasi sinar gamma, laju dosis, physical crosslinking

Judul: Produksi Biohidrogel Berbasis Carboxymethyl Starch - Kitosan.
Abstrak: Hydrogel is a three dimensional polymeric structure which has an ability to absorb and retain water within its structure. Hydrogel can be derived from natural and synthetic polymers. The natural polymers are usually biocampatible and biodegradable thus they do not produce adverse effects. The objective of this research is to analyze the effect of methacrylic acid concentration towards grafting parameter and biohydrogel properties which derived from carboxymethyl starch. Sago and tapioca were used as the raw material of carboxymethyl starch. The grafting process of methacrylic acid onto backbone polymer occured as a consequence of generating radical functional gruops, either in backbone polymer or in methacrylic acid itself. The grafting process had successfully occured based on Fourier Transform Infrared spectra analysis. The best grafting yield, grafting efficiency, and monomer conversion achieved with using 0,550 g/g methacrylic acid. Swelling, solubility, and water absorbtion property of biohydrogel are affected by methacrylic acid concentration. Meanwhile, oil absorbtion property is not affected by methacrylic acid concentration.
Keyword: biohydrogel, carboxymethyl starch, chitosan, grafting

Judul: Etno-ornitologi Burung Kancilan Flores (Pachycephala nudigula nudigula Hartert 1897) pada Masyarakat Lio di Taman Nasional Kelimutu
Abstrak: Bare-throathed whistler is one of several wild birds in Kelimutu National Park (TNKL) that is believed to have correlation with Lio Community‟s belief. The estimation of Bare-throated whistler‟s population in Kelimutu National Park was about 186.41-1668.07 individual by the density about 0.0389-0.3481 ind/ha with the sex ratio 6.2:1 that spreaded on area with height of 1100 – 1600 masl. The characteristic of Bare-throated whistler‟s habitat is a natural forest with various canopy level, high plant species diversity and high density. The habitat characteristics related to the availability of food in the form of insects, cover, safety and a nesting site. Generally the most of Lio community knew the existence of Bare-throated whistler directly or from their parents‟ stories. The perceptions of Lio Community to the Bare-throated whistler‟s existence is generally support the conservation efforts. The perceptions construct the Lio Community‟s atitude that tend to be conservative to the existence of Bare-throated whistler. The attitude shown by their behavior that not cathing the Bare-throated whistler from the TNKL‟s area or the outside. The attitude have an important role to the existence of Bare-throated whistler in Kelimutu National Park‟s area.
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