Judul: Identifikasi Keanekaragaman Kapang pada Larva Instar Keenam Ulat Sutera Liar Attacus atlas (Lepidoptera: Saturniidae)
Abstrak: Informasi terkait keberadaan kapang pada Attacus atlas sebagai salah satu ngengat raksasa asli Indonesia ini masih jarang diketahui. Tujuan dari penelitian ini adalah untuk memperoleh data keanekaragaman kapang patogen atau non patogen pada larva instar keenam A. atlas. Kapang diisolasi dari empat bagian larva, yaitu trakea, saluran pencernaan tengah dan belakang, serta hemolimfe. Kapang hasil isolasi tersebut kemudian dikultur pada media potato dextrose agar. Identifikasi kapang secara makroskopis dengan mengamati koloni pada media, sedangkan secara mikroskopis menggunakan metode Riddle dan pewarnaan lactophenol cotton blue. Hasil penelitian menunjukkan bahwa terdapat tiga jenis kapang pada larva instar keenam A. atlas yaitu Aspergillus fumigatus, Aspergillus flavus, dan Fusarium dimerum. Ketiga kapang tersebut bersifat patogen oportunistik sehingga keberadaan kapang dapat berpotensi menimbulkan penyakit pada larva A. atlas…
Keyword: Attacus atlas, Larvae, Mould, Pathogenic mould, Non pathogenic mould, Trachea, Midgut, Hingut, Haemolymph

Judul: Prevalensi Infestasi Parasitoid pada Ulat Sutera Liar Attacus atlas (Lepidoptera: Saturniidae) di Perkebunan Teh Kabupaten Purwakarta
Abstrak: The purpose of this research was to study of prevalence infestation of parasitoids to Attacus atlas (Lepidoptera: Saturniidae), characteristic of the pupae parasitoids discharge, species of parasitoid, and infestation of parasitoid. The results showed the prevalence of parasitoids on A. atlas in the tea plantation Purwakarta Regency was 29.61%. There were three species of parasitoid obtained, i.e. (1) Xanthopimpla gampsura (Hymenoptera: Ichneumonidae) with a prevalence of 21.23%, this parasitoid were make a hole in the anterior pupae (5.39 ± 0.49 mm); (2) Theronia sp. (Hymenoptera: Ichneumonidae) with a prevalence of 6.15%, with hole located anterior (2.75 ± 0.21 mm), lateral (2.67 ± 0.29 mm), and the anterior-lateral holes in one pupae (2.7 ± 0.21 mm), and Parasitoid (3) Exorista sorbillans (Diptera: Tachinidae) with the prevalence of 2.23%. There were 5-8 larva of E. sorbillans / pupa of A. atlas.
Keyword: tea plantation, prevalence, parasitoid, Attacus atlas, Bogor Agricultural University (IPB)

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