Judul: Karakteristik Bioakustik dan Tingkah Laku Ikan Mujair (Oreochromis mossambicus) terhadap Perubahan Salinitas
Abstrak: Swim bladder of fish body part that serves to amplify the voice and breathing apparatus in fish. Tilapia fish is one type of vertebrate fish that have swim bladder that is used as a resonance chamber that produces sound to communicate. Tilapia fish is one type of vertebrate fish that have swim bladder that is used as a resonance chamber that produces sound to communicate. Physiologically, fish behavior can be shown with the character of the sound produced. Bioakustik research can analyze the behavior and characteristics of the sound produced bubbles tilapia fish swimming in waters with different salinity. The study was conducted in June 2013 at the Laboratory of Acoustics and Marine Instrumentation, Bogor Agricultural University with stage includes the preparation of the aquarium , the selection of fish , adding salt , visual observations in the aquarium , visual observations in open water , voice recording and data analysis . The results showed on day 1 to day 6, the frequency and frequency operculum tilapia fish mouth opening increased. Day 7 to day 15, the frequency and the frequency of mouth opening operculum tilapia fish slowed. The intensity of the sound produced tilapia fish is influenced by the behavior due to the effect of the contraction of the muscles of the swim bladder in fish tilapia.
Keyword: behavior, sound, tilapia fish, swim bladder, bioacoustics

Judul: Pengukuran Karakteristik Refleksi Ikan Dalam Kondisi Terkontrol di Labotarium Akustik Kelautan Menggunakan Quantified FISH FINDER
Abstrak: Sumber daya hayati dari laut dan perairan tawar yaitu ikan. Salah satu cara untuk mengetahui bagaimana kita dapat mengeksplorasi sumber daya alam di lautan dengan tepat adalah dengan mempelajari karakteristiknya dengan menggunakan Teknologi akustik. Teknologi ini dapat mendeteksi lokasi dan jumlah dari ikan serta menduga tingkah laku ikan tersebut. Teknologi akustik yang dimaksud ini adalah echosounder. Ditinjau dari segi akustik permasalahan akurasi dalam deteksi ini terutama disebabkan scattering suara yang terjadi pada waktu transmisi dan refleksi, untuk menganalisis hal tersebut, analisis data yang umum digunakan dalam penelitian refleksi akustik ikan adalah dengan perhitungan Target Strength Output data yang dihasilkan dari echosounder ini bisa berupa echogram dan sinyal Amplitudo, Pada penelitian ini pendugaan ikan dilakukan dengan pengolahan sinyal amplitudo ikan menjadi Echo Strength dan Target Strength dari echosounder menggunakan metode hidroakustik dan Continous Wavelet Transfrom.
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Judul: Prenilasi Senyawa β-Diketon sebagai Prekursor 3-Prenilflavon
Abstrak: One group of flavonoids that has not been commonly synthesized is 3- prenylflavone. The main objective of this experiment was to synthesize precursor of 3-prenylflavone. Firstly, β-diketone was synthesized via 4 steps from phenol as starting compound with total yield of 24%. Prenylation of β-diketone with prenyl bromide and K2CO3 base produced 4 fractions which were separated by using preparative thin layer chromatography (PTLC) with n-hexane:EtOAc (8:2) as the eluent. Fraction with Rf = 0.80 was further separated by using preparative PTLC with n-hexane:EtOAc (99:1) as the eluent. Two fractions were obtained with Rf = 0.38 and 0.42. The first fraction has been characterized as diprenylated β-diketone with 49% yield. Application of protecting group on the phenolic OH group in β- diketone are needed to obtain monoprenylated β-diketone which can be further cyclized into 3-prenylflavone
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