Judul: Performance test of the solar dryers greenhouse effect (erk) hybrid type of tub for drying of maize (zea mays l)
Abstrak: Drying is one of the important stages in postharvest technology of grains, particularly corn. Drying process can be done by natural drying or artificial drying methods. Natural drying is drying by utilizing direct sunlight, while artificial drying is drying process by using dryer machines or mechanical dryer. Green House Effect (GHE) hybrid solar dryer has been developed to fullfill the needed of solar dryer machine which can be operated eventhough in the unfavorable weather or in the night, so it can be operated 24 hours in a day. The aim of this study is to evaluate performance of GHE hybrid solar dryer which has been designed specifically for one ton (zea mays grain) capacity. Result of this study shows that the machine should be operated in hybrid system to reach the drying temperature level (40-60 oC). Solar energy as main energy source only share 10%-25% of the total heat energy needed for the process. Additional energy for the heating process given by biomass (fire wood) at combustion rate 5.05-5.39 kg/hour. It needed 23-25 hours to reduce moisture content from around 31% wb to 14% wb, in the average temperature of drying chamber 55.72 oC and relative humidity at 33.8%. Average total energy efficiency of the drying system using only solar irradiation as energy source (in the morning and sunny day), hybrid system (in unfavorable condition), and only biomass (in the night) are 27.5% , 28.3% and 43.74%.
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Judul: Uji Performansi Pengering Efek Rumah Kaca (ERK)-Hybrid Tipe Rak Berputar untuk Pengeringan Sawut Ubi Jalar (Ipomoea batatas L.)
Abstrak: Rotating rack green house effect (GHE) solar dryer is one type of dryer with the source of energy from solar and biomass energy for drying of agricultural products on the racks that can be rotated verticaly. The capacity of the drying chamber is 48 kg of chopped sweet potatoes. The objective of this study is to test the performance of the hybrid green house effect dryer for drying chopped sweet potatoes and to define modeling of heat transfer in the drying chamber. There are three experiments of drying: the first is without products, the second and the third are drying products without rotating rack and implement the rotating rack 45° every 60 minutes, respectively. The results of chopped sweet potatoes drying show that drying temperature on the dryer chamber ranged between 31.6-61.5°C. To reduce moisture content from around 71.3 %wb to 9.96 %wb for Experiment 2 and to reduce moisture content of 72.76 %wb to 9.5 %wb for Experiment 3, it is needed 14.5 hours and 13.5 hour, respectively. The specific energy consumption of both experiments were 42.83 MJ/kg of moisture evaporated and 35.15 MJ/kg of moisture evaporated and the drying efficiency of 5.78 % and 7.47%, respectively. Based on the performance test, it can be concluded that rotating rack dryer shows better performance than that of without rotating rack.
Keyword: solar dryer, biomass, Chopped sweet potatoes

Judul: Infeksi cacing Ascarid pasa anjing dan kucing, serta hubungannya sebagai zoonosis
Abstrak: Ada tiga cacing Ascarid yang didapatkan pada anjing dan kucing, yaitu Toxocara canis pada anjing, Toxocara cati pada kucing dan Toxascaris leonina pada anjing dan kucing. Ketiganya mempunyai habitat di usus kecil (Soulsby, 1982). Manusia dapat bertindak sebagai induk semang paratenik dari kelompok ini, melalui anjing dan kucing yang menderita sebagai sumber infeksi, terutama anak- anak anjing dan anak-anak kucing (Brown, 1975). Dari kelompok Ascarid ini penyebab utama penyakit pada manusia adalah Toxocara canis (Soulsby, 1982). Penyakit pada manusia yang disebabkan oleh kelompok ini dikenal sebagai penyakit 'Visceral Larva Migrans' (Brown, 1975), Toxocariasis (Beaver, 1966). Penularan pada anjing dan kucing, dapat melalui telur infektif (langsung), induk semang paratenik seperti tikus, kecos, cacing Lanah dan lain-lain (tidak langsung), intrauterin, trans-mammary dan secara fecaloral. Pada manusia, penularan terjadi melalui telur infektif yang tertelan. Gejala klinis yang tampak pada anjing dan kucing yang terinfeksi oleh kelompok ini, adalah anjing kurus, pertumbuhan terhambat, gelisah, batuk, respirasi meningkat, keluar cairan dari hidung, muntah yang kadang kadang bercampur dengan cacing, icterus, diare, sakit pada abdomen, perut buncit dan kadang-kadang timbul gejala konvulsi (Kelly, 1977). Pada manusia tanda klinis yang umum terlihat, yaitu batuk, dispnoe disertai demam dan gejala umum lainnya. Kadang-kadang endopthalmitis, retinitis perifer, papilitis, dan konvulsi. Pemeriksaan darah terlihat eosinofilia, leukositosis, hiperglobulinemia dan pemerik saan yang lain memperlihatkan hepatomegali…dst
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