Judul: Deteksi Residu Antibiotik pada Hati Itik Berasal dari Peternakan di Kabupaten Bogor
Abstrak: The research was aimed to detect the existence of antibiotic residue in ducks liver at poultry in Bogor District. There were 53 samples which were taken from 5 Sub-districts in Bogor District. The research was done by bioassay method. The result showed that antibiotic residue in ducks liver was detected positive (32.1%) from aminoglicoside and macrolide group. Antibiotic residue came from poultry in Ciomas Sub-district (29.4%), Gunung Sindur (11.8%), Jasinga (35.3%), and Jonggol (23.5%). Based on aminoglicoside group, it was 3.77% came from Jonggol Sub-district (12.5%), while tetrasiclin and penicilin was not found. In Klapanunggal Sub-district was detected negative antibiotic residue in the result of testing. Therefore, it is needed to control toward the excistence of antibiotics residue in order to guarantee the consumens health
Keyword: duck., bioassay method, antibiotic residue

Judul: Analisis Residu Antibiotik pada Daging dan Hati Itik di Kabupaten Bogor
Abstrak: Itik merupakan salah satu sumber protein hewani yang banyak dikonsumsi di Indonesia. Kualitas dan keamanan daging itik yang dikonsumsi perlu diperhatikan dari bahaya adanya residu antibiotik yang terkandung di dalam daging. Penelitian ini bertujuan untuk mendeteksi residu antibiotik yang terkandung pada daging dan hati itik. Sebanyak 52 sampel daging dada, daging paha dan hati itik yang diperoleh dari 7 kelompok ternak itik di 5 kecamatan di wilayah Kabupaten Bogor yaitu Kecamatan Ciomas, Gunung Sindur, Klapanunggal, Jasinga dan Jonggol. Sampel yang diambil dari setiap kecamatan berdasarkan proporsi jumlah kelompok ternak itik di setiap kecamatan di Kabupaten Bogor. Hasil pengujian residu antibiotik dengan metode bioassay pada masing-masing sampel daging dan hati itik yang diambil dari peternakan itik di Kabupa-ten Bogor menunjukkan adanya residu antibiotik pada daging dada (7.69%), daging paha (9.61%) dan hati (32.69%). Residu antibiotik golongan makrolida dideteksi pada sampel daging dada, paha, dan hati. Pada sampel daging dada dideteksi residu antibiotik golongan tetrasiklin, sedangkan golongan aminoglikosida dideteksi pada sampel hati. Sampel yang menunjukkan hasil positif pada metode bioassay dikonfirmasi dengan metode high performance liquid chromatography (HPLC). Pada sampel daging dada dan paha yang positif antibiotika dideteksi adanya residu antibiotik jenis tilosin dari golongan makrolida dengan kadar 0.07–0.360 mg/kg. Antibiotika jenis tetrasiklin dari golongan tetrasiklin dideteksi pada sampel daging paha dengan kadar 0.201–0.321 mg/kg.
Keyword: antibiotic residue, bioassay, duck liver, duck meat, HPLC.

Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition