Judul: Optimasi Tungku Berbahan Bakar Sekam Padi dan Tempurung Kelapa dan Analisis Termal
Abstrak: At the previous research have investigated that the efficiency and heat distribution of furnace for husk rice and coconut shell fuels with bottom diameters of 6, 9 and 12 cms. The treatments are with and without using a plate. Efficiency of treatment using a plate for rice husk fuel with diameters of 6, 9 and 12 cms for coconut shell fuel respectively are 12.50%, 12.37%, and 11.77% and that respectively are 2.41%, 2.09%, and 2.66%. For efficiency of treatment that using a plate for rice husk fuel respectively are 7.76%, 6.37%, and 6.63% whereas for coconut shell are 1.53%, 1.64%, and 1.71%. The distribution of heat that occured the reservoir wall are analyzed by computing with lagrange interpolation method and to facilitate its use, determined the type of heat region on the resevoir wall that consists of the increasing temperatur heat region, the descreasing temperature heat region and the sub-region, so that it will produce function of heat distribution pattern for each region
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Judul: Optimasi Diameter Tungku Berbahan Sekam Padi dan Cangkang Kelapa Sawit serta Analisis Efisiensi dan Sebaran Kalornya
Abstrak: The use of rice husk and palm shells as alternative energy has a very high potential in Indonesia. This research was conducted under variations of the diameter of the plate of the cone, there is 6, 9, and 12 cm were installed at the rice husk stove IPB using rice husk fuel and oil palm shell, then applied three times for each to boil 1 liter of water. Efficiency using rice husk fuel with an inner diameter of 6 cm below the plate of the cone is 7.91%, diameter of the plate of the cone which 9 cm is 7.25%, diameter of the plate of the cone which 12 cm is 6.52%. While using fuel oil palm shell with the plate of the cone diameter 6 cm is 5.46%, the plate of the cone diameter 9 cm is 5.25%, and the plate of the cone diameter 12 cm is 4.24%. The result for processing of the heat distribution at the center of the pan using a Gauss‐Seidel iteration method. Heat distribution on the bottom of the pan with temperature from rice husk combustion has lower temperature than the oil palm shell. The more number of elements domain points the more accurate of the calor spread results.
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Judul: Infeksi leucocytozzon simondi (Mathis dan Leger, 1910) pada itik
Abstrak: Leucocytozoonosis pada itik adalah penyakit protozoer yang disebabkan oleh parasit darah Leucocytozoon simondi. Protozoa ini ditularkan oleh lalat penghisap darah (Simulium sp.). Di dalam tubuh induk semang antara (vektor) Simulium parasit mengalami tahap gametogoni yang kedua (pembentukan gamet dan pembuahan) dan sporogoni. Pembuahan makrogamet oleh mikrogamet terjadi segera sesudah vektor menghisap darah itik yang mengandung gametosit. Pembuahan menghasilkan zigot yang dapat bergerak (ookinet) yang masuk dinding usus vektor dan kemudian memasuki tahap sporogoni. Tahap sporogoni memerlukan waktu kira-kira 1 minggu (Fallis dan Desser, 1977) untuk menghasilkan sporozoit. Sporozoit bergerak menuju kelenjar ludah vektor, tempat mereka berkumpul. Sporozoit dipindahkan ke dalam tubuh itik pada saat vektor menghisap darah itik. Di dalam tubuh itik, parasit mengalami tahap skizogoni dan tahap gametogoni yang pertama (pembentukan gametosit). Sporozoit memasuki peredaran darah itik dan memasuki sel-sel parenkhim hati membentuk skizon hepatik (Fallis et al., 1974). Setelah 4 6 hari, skizon hepatik dewasa menghasilkan merozoit dan sinsitia. Merozoit dari skizon hepatik memasuki eritrosit dan eritroblas membentuk gametosit bundar, sedangkan sinsitia memasuki sel-sel RES di seluruh tubuh membentuk megaloskizon. Megaloskizon dewasa terbentuk dalam waktu 5 hari di dalam sel-sel itu dan menghasilkan merozoit. Merozoit dari megaloskizon memasuki limfosit dan leukosit lainnya membentuk gametosit memanjang. ...
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