Judul: Synthesis of antibacterial hydrogels based on carboxymethyl cellulose-succinic acid-AgNO3
Abstrak: Hidrogel berbasis karboksimetil selulosa (CMC) memiliki potensi yang baik untuk digunakan sebagai penutup luka. CMC direaksikan dengan asam suksinat (AS) sebagai agen pengikat silang dan AgNO3 sebagai zat antibakteri. Penelitian ini bertujuan menyintesis hidrogel antibakteri berbasis CMC-AS-AgNO3, mempelajari ciri-ciri, dan potensinya sebagai zat antibakteri. CMC yang digunakan berasal dari selulosa bakteri. CMC tersebut memiliki nilai kadar air sebesar 9%, pH 4.6, dan derajat substitusi sebesar 0.24. Campuran CMC dan asam suksinat ditambah AgNO3 dengan ragam konsentrasi 0.2%, 0.4%, dan 0.6%. Peningkatan konsentrasi AgNO3 mengakibatkan peningkatan kemampuan pembengkakan hidrogel. Peningkatan konsentrasi AgNO3 juga meningkatkan zona inhibisi CMC-AS-AgNO3 terhadap bakteri Escherichia coli dan Staphylococcus aureus. Zona inhibisi terluas dihasilkan oleh CMC-AS-AgNO3 0.6% dengan diameter zona inhibisi sebesar 17 mm terhadap bakteri E. coli dan 12 mm terhadap bakteri S. aureus. Hidrogel CMC-AS-AgNO3 dicirikan menggunakan mikroskop elektron payaran dan difraktometer sinar-X.
Keyword: antibakteri, CMC-AS-AgNO3, hidrogel, zona inhibisi

Judul: Sintesis Hidrogel Antibakteri Berbasis Karboksimetil Selulosa- ZnSO4
Abstrak: Coconut water could be made into nata de coco that contain cellulose. The cellulose can be further chemically modified into cellulose derivates such as carboxymethyl cellulose (CMC). Then CMC was used as an antibacterial hydrogel materials using crosslinking agents such as succinic acid, and ZnSO4 as an antibacterial agent. The synthesized CMC was characterized for the degree of substitution, the pH of a CMC solution of 1%, and moisture content. The CMCsuccinic acid was characterized based on infrared spectra. The difractogram and microphotograph showed that ZnSO4 was not converted into ZnO. The surface analysis of the highest swelling of CMC-succinic acid-ZnSO4 hydrogel using scanning electron microscopy. The swelling ability of the hydrogel increase with the increasing ZnSO4 concentration. The antibacterial test showed that the synthesized hydrogel inhibited Staphylococcus aureus and Escherichia coli growth and potentialy used as an antibacterial hydrogel.
Keyword: Bogor Agricultural University (IPB), hydrogels, crosslinked CMC, cellulose modification, antibacterial activity

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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