Judul: Interaksi antara cendawan koloni nematoda puru akar dan Meloidogyne incognity pada kedlai
Abstrak: This study was conducted to investigate the interaction between fungal species colonizing root-gall nematodes (egg and female adult stages) and Meloidogyne incognita of soybean. From this study it is expected to find a number of fungal species which are effective for controlling M. incognita of soybean. The experiment was done in the laboratory and greenhouse of the Department of Plant Pests and Diseases Faculty of Agriculture Bogor Agricultural University, from June 1995 to November 1996. The resistance of 19 soybean varieties to M.incognita was evaluated by infesting second-instar juveniles (L-2) to the soil containing 1-week-old seedlings. Each plant was planted in a polybag containing 4 litres of soil of Segunung andosol type which was infested with 500 L-2 M.incognitall of soil. The degree of resistance was determined acording to Taylor (1967).
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Judul: Usaha menekan serangan nematoda bintil akar meloidogyne spp terhadap beberapa kultivar kentang (Solanum tuberosum L.) dengan menggunakan beberapa isolat fungsi
Abstrak: Penyakit bintil akar yang disebabkan oleh Meloidogyne spp (root knot nematodes) telah dilaporkan sejak tahun 1885 sebagai penyebab kerusakan pada tanaman, terutama pada daerah tropis dan subtropis. Tanaman kentang merupakan salah satu tanaman yang sering diserang nematoda tersebut. Salah satu metode pengendalian nematoda bintil akar adalah secara biologis, yaitu dengan pemakaian organisme sebagai agen antagonis nematoda Meloidogyne spp . organisme tersebut ialah fungi. Penelitian ini bertujuan untuk melihat efektivitas beberapa isolat fungi (yang diisolasi dari rhizosfera tanaman kentang) sebagai agen antagonis nematoda dan melihat ketahanan beberapa kultivar kentang terhadap serangan nematoda Meloidogyne spp. Percobaan dilakukan di Kebun Percobaan Institut Pertanian Bogar, Pasir Sarongge Cipanas pada bulan September 1991 sampai Februari 1992. Percobaan menggunakan Rancangan Acak Kelompok dengan dua faktor perlakuan. Faktor pertama adalah perlakuan pemberian isolat fungi yang terdiri dari 3 jenis isolat, yaitu Fusarium sp, Gliocladium sp dan Asper9ilus ni9er serta 1 perlakuan kontrol tanpa pemberian fungi. Faktor kedua adalah kultivar kentang yang terdiri dari 4 kultivar, yaitu Katahdin, Eba, Red Pontiac dan Astarte. Setiap kombinasi perlakuan di ul ang enam kal i. ...
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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