Judul: Inventarisasi Parasit pada Benih Ikan Gurame dalam Kolam Terpal di Kecamatan Pengasih Kabupaten Kulon Progo Yogyakarta.
Abstrak: The objective of this research was to record the parasites (ectoparasite and endoparasite) in giant gourami which cultured in plastic lined pond system. Thirty fingerlings for each size ranges of 3-4 cm, 5-6 cm, and 10-11 cm were collected from plastic lined ponds in three different villages, Desa Mergosari, Desa Kemiri, and Desa Karang Tengah, Kecamatan Pengasih, Kabupaten Kulon Progo, Yogyakarta. The examination showed that there were 5 genera of ectoparasites found in gouramy fingerlings, namely Trichodina, Chilodonella, Dactylogyrus, Gyrodactylus, and Ichthyophthirius. The highest prevalent and parasite intensity were found in Trichodina in 5 – 6 cm sized fish which were 100% and 28 ind/fish, respectively. There was no endoparasite found in giant gouramy fingerlings during the examination period.
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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: Natrium lignosulfonat sebagai agen pendispersi pada mortar
Abstrak: Lignosulphonate, a modification product of lignin waste from pulp and paper industry can be used as water reducer in mortar mixture. This substance can influence the mechanical characteristic of mortar such as diameter of flow, flexural strength, compressive strength, and setting time of cement paste. Lignosulphonate shows it function as dispersant on cement hydration at 3 days that analyzed with x-ray difractometer. Research result show that flow of fresh mortar rise with increase concentration (from weight of cement) of synthetic sodium lignosulphonate (NaLS). It show that mortar homogenity also increasing. The result of flexural strength and compressive strength test use synthetic NaLS 0.1-0.3% from weight of cement show that addition synthetic NaLS 0.2% is the best result because it has the biggest of flexural strenght and compressive strength value. Initial setting time of cement paste increase, about 50% with addition of synthetic NaLS 0.2%. Whereas the final setting time decrease, about 8%. Cement hydration test show increase hydration product peak, Ca(OH)2 dan calcium silicate hydrate (C-S-H).
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