Judul: Karakteristik morfologi, suara dan genetik burung derkuku(Streptopelia chinensis), puter(Streptopelia risoria) dan silangannya
Abstrak: Penelitian ini bertujuan menelaah karakteristik morfologi kualitatif dan kuantitatif, termasuk suara dan kegenetikaan burung derkuku (Streptopelia chinensis), puter (Streptopelia risoria) dan silangannya. Hasilnya akan mendukung kesuksesan program persilangan kedua jenis burung ini. Digunakan burung dewasa sebanyak 46 ekor terdiri dari 17 ekor burung derkuku, 21 ekor burung puter dan delapan ekor silangan (F1). Karakteristik morfologi burung derkuku, puter, dan silangan (FI) antara lain sifat-sifat kualitatif dan kuantitatif melalui pengamatan ciri-ciri khusus dan pengukuran terhadap bagian tubuh burung-burung ini. Karakteristik suara diperoleh dengan perekaman menggunakan Digital Voice Recorder. Selanjutnya suara dianalisis dengan menggunakan program komputer Voice Editor 3 dan Cool Edit Pro untuk mendapatkan frekuensi, jumlah element syllable, durasi suara, durasi antara, tempo dan amplitudo suara. Untuk mengetahui karakteristik genetik, dilakukan dengan menelaah pola pita protein darah berdasarkan hasil analisis protein darah melalui teknik elektroforesis metode gel poliakrilamida model vertikal...
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Judul: Pola Pewarisan Karakter Suara Kicauan Pada Burung Perkutut
Abstrak: Turtledove (Geopelia striata) is a singing birds that has a better melodious voice. The inheritance of this character has not been determined, so that research on the voice inheritance is important. This study was aimed to characterize the voice patterns turtledove. Materials consisted of 12 pairs of parents and their progenies. Twelve of their turtledove was ranked based on their sound quality. The parameters observed included voice patterns, the presence of elements of sound, the type of sound, harmonious sound (frequency and level of sound intensity) and duration of the total sound. Voice analysis was done by using computer software Cool Edit Pro version 2.1. Sound visualization was displayed in waveform shape. Sound intensity level was determined using the formula TI = 10 log I/I0, with the value I0 at 10-12 W/m2. Based on the inheritance analysis sire voices is a better chance in herediting of the voice and the number of beats sound of the middle voice. Dam plays an role in giving voice rhythm modification and sound tip inheritance. Based on the sound analysis, sound quality the voice rank from the highest to the lowest were: ♂AK, ♂ FQ, ♂HHa, ♂ ISS, ♂HRR, ♂ BL, ♂CM, ♂ EQ, ♂GQ, ♂DO, ♂DN, and ♂DP. The frequency value and the highest intensity level displayed by AK turtledove were 929.49 Hz and 91.5 dB, whereas the lowest value displayed by ♂DP were 633.59 Hz, and 67.83 dB. The best rhythm of the turtledove indicated by high frequency with a stable pattern, harmonious the intonation, as well as clear basic voice.
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Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4