Judul: Kopolimerisasi Fine Coal dan Poliakrilamida sebagai Polimer Superabsorben
Abstrak: Fine coal merupakan limbah padat hasil pencucian batu bara berukuran halus dengan diameter kurang dari 2 mm. Limbah tersebut ditumpuk begitu saja dan akan terbawa air hujan menuju perairan dan lingkungan di sekitar wilayah tambang. Hal ini dapat mencemari lingkungan sehingga diperlukan pemanfaatan fine coal lebih lanjut. Tujuan penelitian adalah menyintesis superabsorben (SAP) dengan kopolimerisasi penaut silang fine coal dan akrilamida. Kopolimerisasi dilakukan selama 3 jam pada suhu 70 C dan disaponifikasi dengan NaOH 1 M selama 2 jam. Superabsorben dibuat dengan 2 perlakuan, yaitu tanpa saponifikasi dan dengan saponifikasi dengan kode kopolimer C1, C2, dan C3. Kapasitas absorbsi maksimum diperoleh pada SAP C2 dengan komposisi 25% fine coal, 75% akrilamida, 0.11% N,N-metilena-bis-akrilamida (MBA), dan 1.11% amonium persulfat (APS). Kapasitas absorbsi yang diperoleh sebesar 42.36 g/g untuk SAP tanpa saponifikasi dan 617.86 g/g untuk SAP saponifikasi. SAP dapat membengkak optimal pada pH 6 dan 7. Pembentukan kopolimerisasi pencangkokan-penaut silang SAP telah ditunjukkan oleh spektrum inframerah.
Keyword: akrilamida, fine coal, kapasitas penyerapan air, kopolimerisasi, superabsorben

Judul: Sintesis Superabsorben melalui Kopolimerisasi Pencangkokan Asam Akrilat pada Onggok Dialdehida
Abstrak: Cassava waste pulp (onggok) is a residual pulp obtained from starch industry. The purpose of this study is to modify the pulp through oxidation with NaIO4 followed by grafting and crosslinking copolymerization to obtain superabsorbent polymer (SAP). The carbonyl content measurement was utilized to determine the optimum condition for oxidation. Oxidation with 0.05 M NaIO4 for 1 hour and subsequent acetone washing solution gave the best result. Grafting and crosslinking of acrylic acid on the pulp backbone were performed with N,N’- methylene-bis-acrylamide as crosslinker and ammonium peroxidisulfate as the initiator. The synthesis was carried out at 70–75 ºC for 3 hours, then the water absorptive capacity of the copolymer products were determined. Water absorptive capacity of SAP was 893.22 g/g in 24 hours. The maximum absorptive capacity of SAP in solutions with pH ranging from 2 to 11 was 915.26 g/g at pH 9, whereas the maximum absorptive capacity in salt solutions were obtained at 0.01 M NaCl, namely 137.42 g/g.
Keyword: absorptive capacity, acrylic acid, cassava, oxidation, superabsorbent

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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