Judul: Studi Kasus Patologi Infeksi Protozoa Tetrahymena spp pada Ikan Hias Guppy (Poecilia reticulata )
Abstrak: The study was aimed to explore the protozoan Tetrahymena spp infection in Guppy (Poecilia reticulata) fish, with intended to the morphology of parasites in tissue sections and the resulting tissue lesions. Sample of diseased Guppy fishes were used in the study. Observation of clinical symptoms of the Guppy were revealed lethargic, vertical swimming and impaired equilibrium. The fish organs were observed macroscopically and microscopically. The result of macroscopic observation showed that there were excessive haemorrhage and ulceration at skin particularly in the dorsal and lateral abdomen. Protozoan parasite in the skin, muscles and gill tissues were identified by histopathological examination using hematoxylin-eosin staining and positive responses to periodic acid Schiff staining. Study of protozoan morphology revealed a spherical shape pyriform with a narrow anterior end, have dimension in average 50.5 x 32.4 μm. The parasites cause skin erosion, and hemorrhage, muscular degeneration and necrosis along with gills edema. Severe fatty degeneration was presented in liver while there was edema and congestion in the intestinal mucosa. As these fishes were been cultured in the aquarium such disease is thought to be caused by the deterioration of water quality, feed contamination or a poor handling.
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Judul: Studi Histopatologi Insang, Usus Dan Otot Ikan Gurami (Osphronemus gouramy) Akibat Infestasi Parasit Protozoa Di Desa Carangpulang Dramaga Bogor
Abstrak: The aim of the research was to find out the histopathological lesions of gouranzy fish gills, intestines, and muscles from Carangpulang Village Bogor. Fifteen fishes about a year old wlere used as sample in this research. Histopathological examination was done by lzenzatoxiilin and eosin stain (HE). Microscopically, gill was the izostc ommon organ with pathological lesions. Gill was ofen infected by flagellum protozoa parrrsites, such as Ichthyobodo sp, Myxozoa (Hennegujla sp and Myxobolus sp) and unidentified protozoa. In intestines, no specijic pathological change was found, while in muscle tissue hyaline and vacuola degenerations as well as necrotic lesions were commonly detected. Based on all findings mentioned above, the lesion of gill fishes were inzcted by protozoa Ichthyobodo sp and myxozoa which can cause ichthyobodosis. Moreover, we suggest that a non infectious agent such as chemical polutans as one of the caused of oedema, telangiectasis and thickening of lamella of the gills.
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Judul: Pemanenan Energi Listrik dari Kincir Angin Vertikal
Abstrak: Usaha pemanenan energi angin di Indonesia masih sedikit. Sampai Tahun 2016 hanya 3.54 MW alat pemanenan energi angin yang sudah terpasang. Kendala utamanya ialah dibutuhkan investasi yang besar untuk membuatnya. Pembuatan kincir angin dengan ukuran yang lebih kecil dengan bahan yang dapat dibeli di pasar lokal menjadi solusi agar pembuatan kincir angin lebih ekonomis. Pembuatan kincir vertikal tipe Savonius dapat menjadi solusinya. Kincir vertikal Savonius dapat beroperasi pada kecepatan < 3 m/s dan ketinggian < 50 m. Kincir angin ini terdiri dari tiga sistem, yaitu generator, rotor kincir dan transmisi pulley-belt. Generator dibuat dari modifikasi motor AC dan magnet neodymium. Rotor kincir dibuat dari pipa PVC 4”, pipa alumunium ¾”, dan papan polikarbonat. Transmisi pulley-belt dibuat dari plastik dan karet. Kincir ini membutuhkan gaya minimal 3 N untuk dapat berputar atau torsi minimalnya 0.75 Nm. Kecepatan angin yang dibutuhkan untuk merotasikannya sebesar 1.9 m/s. Daya maksimal yang dapat dihasilkan ialah 5.76 watt berupa tegangan sebesar 36 volt dan arus 160 mA.
Keyword: energi terbarukan, generator, motor AC, sudu Savonius