Judul: Reproductive Capacity of Aedes aegypti In Laboratory
Abstrak: Penelitian ini dilakukan untuk mengetahui tentang perilaku kawin, kapasitas reproduksi Aedes aegypti meliputi jumlah kelompok telur, jumlah telur, daya tetas telur, produksi telur fertil yang dihasilkan oleh nyamuk betina Aedes aegypti tanpa jantan, dan jangka hidup nyamuk Aedes aegypti. Nyamuk Aedes aegypti diperoleh dari Insektarium Bagian Parasitologi dan Entomologi FKH IPB. Penelitian ini terdiri dari tiga perlakuan. Perlakuan pertama dimasukkan satu ekor jantan dan satu ekor betina ke dalam kandang pertama, perlakuan kedua dimasukkan satu ekor jantan dan dua ekor betina ke dalam kandang kedua, dan perlakuan ketiga dimasukkan satu ekor jantan dan tiga ekor betina ke dalam kandang ketiga. Setiap perlakuan diulang sebanyak lima kali ulangan. Hasil yang diperoleh, untuk perilaku kawin nyamuk Aedes aegypti di dalam kandang yang kerap ditemui adalah posisi ventral to ventral. Pada kapasitas reproduksi terlihat jumlah kelompok telur yang dihasilkan pada setiap perlakuan tidak menunjukkan perbedaan yang nyata. Jumlah telur yang dihasilkan oleh setiap ekor betina tidak menunjukkan perbedaan yang nyata begitu pula dengan daya tetas telur yang tidak menunjukkan perbedaan yang nyata pada setiap perlakuan. Kapasitas reproduksi terkait dengan telur fertil yang dihasilkan menunjukkan nyamuk Aedes aegypti betina dapat menghasilkan telur yang fertil walaupun nyamuk jantan telah mati. Pada jangka hidup nyamuk betina tidak menunjukkan perbedaan yang nyata.
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Judul: Kemampuan Reproduksi Nyamuk Aedes aegypti Berdasarkan Keberadaan Nyamuk Jantan
Abstrak: The research was conducted to determine the reproductive capability of Aedes aegypti related to the presence of male mosquitoes, that include the number of eggs, eggs groups, egg hatchability and fertility between female Aedes aegypti that lived together with the male mosquitoes during her life and female mosquitoes that lived together with the male mosquitoes until it’s first gonotrophic cycle. Mosquitoes were obtained from the Parasitology and Medical Entomology Insectarium FKH IPB. This research consisted of two treatment groups. Every treatment was repeated three times and each repetition consist of 20 females and 10 males Aedes aegypti mosquitoes. The first treatment group consist of females that lived together with males during her life. The second treatment group consist of female mosquitoes that lived together with the male mosquitoes in the same cage until it’s first gonotrophic cycle. The number of eggs and eggs groups on both treatment did not show a significant difference. Egg hatchability also did not show a significant difference on both treatments. The female mosquitoes that lived together with the male mosquitoes just until the first gonotrophic cycle was capable to produce eggs in every gonotrophic cycle due to having a spermathecae.
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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