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: Cacing endoparasit pada kadal kebun (Eutropis multifasciata) di sekitar kampus IPB Dramaga dan Gunung Salak Endah Bogor
Abstrak: Worm symbionts, inhabitant in gastrointestinal tract of animal need studied for building a database of symbion fauna. The objective of this research was identifying the worms in the gastrointestinal tract of lizard Eutropis multifasciata, which lives around IPB Campus Dramaga and Salak Endah Mount. Worm dehydrated and stained by eosin for microscopic observation. Lizard more found in the Salak Endah Mount (66.67%) than in the IPB Campus Dramaga (30%). The endoparasite worm were mostly found in large intestine (46.8%), in cloaca (31.6%), small intestinal (16.5%), and stomach (5%) respectively. The worms belong to four families, that are Davaineidae (46.8%), Tetrarhynchobothriidae (36.0%), Trichostrongyloidae (15.8%), and Rhabditidae (1.4%).
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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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