Judul: Effect of carrageenan and gelatin addition on the characteristics of starch-based bioplastics
Abstrak: Bioplastik terbuat dari bahan yang bersifat biodegradable seperti pati, karet, kitosan, selulosa, lignin serta beberapa bagian dari hewan seperti kasein, protein, dan lipid. Penelitian ini bertujuan mengetahui formula terbaik dari gelatin dan karaginan sebagai bahan pembuatan bioplastik berbasis pati serta karakteristik sifat fisikokimia material bioplastik dari blending polimer antara pati, karaginan, dan gelatin. Pembuatan bioplastik dilakukan dengan perlakuan rasio gelatin dan karaginan yakni 1:1, 1:4, dan 4:1, dipanaskan menggunakan magnetic stirrer dengan suhu 70°C selama 25 menit. Penambahan karaginan dan gelatin berpengaruh secara signifikan terhadap kuat tarik, ketebalan, dan daya serap air bioplastik yang dihasilkan. Perlakuan terbaik yang digunakan yaitu perbandingan gelatin dan karaginan sebesar 1:4. Karakteristik yang dihasilkan memiliki nilai kuat tarik sebesar 25.85 MPa, elongasi sebesar 60%, ketebalan 0.28 mm, daya serap air sebesar 49.02%, serta memiliki nilai derajat putih sebesar 82.45%., Bioplastics are made from biodegradable materials such as starch, rubber, chitosan, cellulose, lignin and animal parts such as casein, protein and lipids. This research aims to determine the best formula of gelatin and carrageenan as ingredients for making starch-based bioplastics and the characteristics of bioplastics from mixing polymers between starch, carrageenan, and gelatin. Treatment in bioplastics is made from a ratio of gelatin and carrageenan that is 1:1, 1:4, and 4:1, heated with a magnetic stirrer at 70°C for 25 minutes. The addition of carrageenan and gelatin significantly affected the tensile strength, thickness, and water absorption of the bioplastics. The best treatment used is the ratio of 1: 4 gelatin and carrageenan. The resulting characteristics have a tensile strength value of 25.85 MPa, 60% elongation, 0.28mm thickness, 49.02% water absorption, and a white degree value of 82.45%.
Keyword: bioplastics, carrageenan, gelatin, characteristics

Judul: Bioplastic characterization of cassava starch with addition of sodium alginate, cellulose, and limonene
Abstrak: Penggunaan plastik sintetik meningkat setiap tahunnya, namun plastik yang beredar menghasilkan limbah yang sulit terurai sehingga dibuat plastik yang ramah lingkungan. Dalam penelitian ini, bioplastik dibuat dengan paduan tepung singkong dan gliserol dengan nisbah komposisi 75:5 serta beragam konsentrasi natrium alginat, limonena dan selulosa. Bioplastik yang dihasilkan dianalisis bobot jenis, sifat mekanik, permeabilitas uap air, sifat termal, dan morfologi permukaannya. Penggunaan natrium alginat dan selulosa meningkatkan kuat tarik dan bobot jenis. Limonena hasil ekstraksi kulit jeruk meningkatkan elongasi bioplastik dan menurunkan permeabilitas uap air. Analisis termal dengan kalorimeter pemayaran diferensial menghasilkan nilai titik leleh yang meningkat dengan tambahan natrium alginat. Bioplastik yang dihasilkan memiliki morfologi permukaan yang homogen., There is high demand of sintetic plastic production each year, but the use of plastic produces non biodegradable wastes. Therefore, biodegradable plastics can be an alternative solution to overcome the problem in relating with the need of environmentally friendly plastics. Theaim of this study was to characterized bioplastics made of cassava starch with addition of sodium alginate, cellulose, and limonene. Bioplastics were made of composit of cassava starch and gliserol (75:5) and various concentrations of sodium alginate: limonen:celullose. The analysis of density, mechanical properties, thermal analysis, water vapour permeability and morfology were conducted for the biodegradable plastics. The results showed that sodium alginate and celullose increased the tensile strength and density. Limonene extracted from orange peels increased percentage of elongation and the thickness, also decrease the water vapour permeability. Thermal analysis using differential scanning calorimeter showed that sodium alginate addition increased the melting point and it indicated interaction among constituents. The surface morfology of bioplastics composite in thies study showed homogenous character. Keyword: bioplastic, cellulose, limonene, sodium alginate
Keyword: bioplastik, limonena, natrium alginat, selulosa

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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