Judul: Keanekaragaman Tungau Ektoparasit pada Cicak Cosymbotus sp di Wilayah Depok
Abstrak: Ectoparasite mites are parasite that live on the body surface of the host. This research aims to see the diversity, intensity of infestation, and prevalence value of mites on house gecko, Cosymbotus platyurus, in Depok Area. Geckos were collected in three locations, such as houses, markets, and the city forest, and then preserved in 70% ethanol. Mites were collected from the head, tympani, armpit, part of body, thigh, tail, fingers, and toes of the geckos. From 140 individuals collected, 246 individuals of mites were found. The mites could be grouped in the genus of Geckobia and the family of Pterygosomatidae. Based on the morphological characteristics, the mites could be grouped into G1, G4, G5, G6, G7, and G10. Species identification of the mites based on chaetotaxy had confirmed that G5 and G10 were of close similarity to G. gleadoviana, while G4 and G6 were Geckobia Group 1, whereas the similarity of chaetotaxy G1 and G7 could not be confirmed. Prevalence of ectoparasites mites was the highest (55%) on the geckos from the city forest. The highest infestation value (4.0) were found in house geckos infected by G6, while the highest total infestation (4.6) was found among the geckos collected from the city forest.
Keyword: Geckobia, mites, ectoparasite, Cosymbotus, Geckos, Bogor Agricultural University (IPB)

Judul: Keanekaragaman Tungau Ektoparasit Pada Cicak Hemidactylus Di Depok
Abstrak: One of ectoparasites on Hemidactylus lizard are Geckobia mites of family Pterygosomatidae. This research aimed to determine the diversity, prevalence, infestation intensity, chaetotaxy, and total intensity of ectoparasites mites on Hemidactylus lizard in Depok. Mites were taken from head, eyes, a part of body, thigh, tail, front finger, and back finger, then preserved in 70% alcohol. Mites were prepared on whole mount method using polyvinyl alcohol (PVA). This research found 107 of lizard and nine species of ectoparasites mites namely Geckobia sp1, G2 (Geckobia glebosum), Geckobia sp4, Geckobia sp5, Geckobia sp7, Geckobia sp10, Geckobia sp11, Geckobia sp13, and Geckobia sp14. Prevalence mite on lizard H. garnotii was 85.18%, and H. frenatus was 84.61%. The highest of mite infection intensity on lizard H. garnotii was mite G1, and H. frenatus was mite G. glebosum. The highest infection intensity of mite was on H. garnotii. Leg chaetotaxy observations indicated that mites G2 is G. glebosum, G5 and G11 including Geckobia indica group, G10 and G14 including G. gleadoviana group, G13 including G. keegani group, and G4 including Geckobia group 1.
Keyword: Bogor Agricultural University (IPB), mites, chaetotaxy, Hemidactylus, Geckobia, ectoparasites

Judul: Sintesis dan Pencirian Natrium Titanat (Na2Ti2O4(OH)2) Berbahan Dasar Titanium Dioksida
Abstrak: TiO2 can be utilized as basic material for synthesis of sodium titanate (Na2Ti2O4(OH)2). This research was purposed to synthesize and characterize sodium titanate from TiO2 rutile powder as a basic material. Sodium titanate was synthesized by hydrothermal process at temperature 130 °C by mixing TiO2 rutile powder with 5 M and 10 M NaOH solution, then each was calcinated at temperature 700 °C. The energy dispersive X-ray analysis showed that sodium titanate has been successfully synthesized. This result was also supported by functional group analysis with Fourier transform infrared (FTIR) spectrofotometer showing the existence of Ti-O-Na vibration band at 989.42 cm-1. The formation of sodium titanate was depend on the reaction condition such as temperature, reaction time, and NaOH concentration. Scanning electron microscope image indicated that sodium titanate synthesized at 130 °C in 20 hours reaction time with 10 M NaOH had crystal size of 99.37 nm.
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