Judul: Inventarisasi Tungau Ektoparasit Kadal Eutropis multifasciata di IPB Dramaga dan Gunung Salak Endah
Abstrak: Life of each organism is influenced by the life of other organisms, thus forming the interaction between the two. Parasitism is a symbiosis between organisms that live and rely on other organisms and are detrimental to the host, for example the ectoparasite that infest Eutropis multifasciata lizard (Family Scincidae). Ectoparasites are defines as organisms that live on the surface of the host, sucking blood, or find food in the hair, fur, skin, or skin secretions. This study was aimed to explore the ectoparasite mites on E. multifasciata lizard in Bogor Agricultural University (IPB) Dramaga and Salak Endah Mountain, West Java. Observations were carried out for the parts of lizard body that were infested by the mites. Whole mount polyvinillactophenol slide were prepared for mites identification. The results showed that most mite infestations on lizard E. multifasciata were found in the body surface i.e. at stomach, rear legs and the base of the rear legs region, for 43, 22, 19 mites, respectively. This study found five mites families infested E. multifasciata lizard i.e. Trombiculidae, Erythraeidae, Microgyniidae, Ixodorhynchidae, Paramegistidae. Several mites from the family Trombiculidae and Erythraeidae were also existed in larvae and nymphs phase. The dominant mites that infested on E. multifasciata were Trombiculidae which was mostly infested by the larval stage. Based on the previous study, the development process of Trombiculidae mites from egg up to imago was outside the host (in the grass and ground litter). This study result is a particularly important founding since Trombiculidae mites is possible to become the agent of Trombiculiasis disease which cause irritation, swelling and itching in the skin.
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Judul: Tungau ektoparasit pada kadal Eutropis multifasciata di Hutan Pendidikan Gunung Walat dan Kebun Percobaan Cikabayan IPB
Abstrak: Some organism requires interaction with other organism to maintain their survival. Categories of interaction between organism classified in symbiosis mutualism, comensalism, and parasitism. This research focus on parasitic interaction between lizard Eutropis multifasciata as host with their mites as parasites. Lizards can be infested by mites due to the physical interaction of the host, among others, fights, sexual contact, and nesting. This study aims to inventory and identify the mites ectoparasites of lizard E. multifasciata in Gunung Walat Education Forest and Cikabayan experimental farm of Bogor Agricultural University. Prevalency and intensity of mites infestation presented in this study through corelation number of mites found with lenght and weight variation of lizard. Twenty six of sixty one lizard were infested mites with number of mites 296. Prevalence value of mites in Gunung Walat Education Forest Sukabumi was 41.94%, while the prevalence value in Cikabayan experimental farm of Bogor Agricultural University was 43.33%. The results of the identification of two families of mites ectoparasites found that Microgyniidae and Ixodorhynchidae. Microgyniidae mites infestation intensity level greater than Ixodorhynchidae mites on lizards were obtained from both sampling area. The measurement results showed that the length and weight of the lizard is medium and short with variation of weight have levels of mite infestation intensity greatest.
Keyword: Bogor Agricultural University (IPB), infestation, intensity, E. multifasciata, mites, ctoparasites

Judul: Sintesis Superkonduktor YBCO Dengan Metode Evaporasi Dan Karakterisasinya
Abstrak: Telah berhasil dibuat pelet superkonduktor YBCO-123 dengan metode evaporasi dengan menghasilkan Tc = 100 K. Sintesis dilakukan dengan mencampur garam-garam nitrat Y(NO3)2, Ba(NO3), Cu(NO3)2 di dalam pelarut H2O pada suhu 150 oC. Setelah melalui proses pirolisis pada 350 oC selama 1 jam, prekursor dikalsinasi pada 900 oC selama 4 jam kemudian serbuk dikompaksi dengan tekanan hidrolik 5 ton untuk membentuk pelet dengan diameter 1,5 cm dan tebal 0,24 mm. Sintering dilakukan pada suhu 940 oC selama 20 jam. Efek meissner menunjukkan fenomena levitasi pada temperatur sekitar 80 K. Hal ini menunjukkan fasa superkonduktor telah terbentuk. Data XRD memberi mengkonfirmasi bahwa fasa kristal 123 telah terbentuk. Nilai konduktivitas didapat dari hasil pengukuran dengan LCR pada temperatur 300 K sebesar 4 x 10-5 S/cm. Pada penurunan temperatur dari 100 K ke 80 K terjadi kenaikan nilai konduktansi yang tajam dari 4.2 x 10-4 S/cm ke nilai 1.309 x 10-1 S/cm.
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