Judul: Efektivitas Minyak Biji Kamandrah (Croton tiglium) Dan Jarak Pagar (Jatropha curcas) Sebagai Larvasida, Anti- Oviposisi Dan Ovisida Nyamuk Aedes aegypti Dan Aedes albopictus
Abstrak: Aedes aegypti and A. albopictus mosquito is increasing problem of public health, being the vector responsible for dengue and chikungunya. Various effort have been done to control the mosquitoes both chemically and naturally. Croton tiglium and Jatropha curcas seed oil were known to posses insecticide activity against larval mosquito species. The study was aimed to examine effectiveness of C. tiglium seed oil and J. curcas seed oil as larvicidal, anti-oviposition, and ovicidal against A. aegypti and A. albopictus, and quantitative analysis of piperine achieved by spectrophotometer. C. tiglium seed oil possessed a significantly higher larvicidal activity against the 3th-4th instar larvae of A. aegypti and A. albopictus than J. curcas seed oil. The larval mortality was observed after 24 h of exposure. The LC50 value of C. tiglium seed oil and J. curcas seed oil were 769.52 ppm and 1366.07 ppm respectively, against A. aegypti and 707.78 ppm and 905.29 ppm respectively, against A. albopictus. There was a decrease in the number of eggs laid by A. aegypti and A. albopictus with C. tiglium and J. curcas oil (≤ 5% eggs) if compared to control (> 50% eggs). C. tiglium and J. curcas seed oil was effective on 0.4%-0.5% concentration so that could prevent the eggs from being hatched (> 90%). Quantitative analysis of C. tiglium and J. curcas by spectrophotometer revealed the presence of piperine were 0.0385% and 0.0054%. The content of C. tiglium was higher compared to J. curcas as proved by the value of LC50. The result of this study suggested that the C. tiglium and J. curcas oil posses insecticide properties that could be developed and used as natural insecticide for larval mosquito control.
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Judul: Efektivitas Ekstrak Daun Sambang Colok (Aerva sanguinolenta) sebagai Larvasida Nyamuk Aedes aegypti dan Culex quinquefasciatu
Abstrak: Control of mosquito vectors need to be considered because it's role as vector of various diseases. Control efforts to reduce mosquito population more using synthetic insecticides at this time. The controling has become difficult because of resistance to synthetic insecticides. This research was aim to determine the effectiveness of sambang colok (Aerva sanguinolenta) leaf extract as mosquito larvicide against third instar larvae of Aedes aegypti and Culex quinquefasciatus. The study was conducted from April to July 2011 and performed in two stages. First stage was the extraction and phytochemical test and second stage was effication test of those extract againts larvae. The result showed that both of 91.7% Ae. aegypti larvae and 96.7% Cx. quinquefasciatus died at 1000 ppm after 24 hours exposure. Mortality of larvae increased with increasing the extract concentration and duration of exposure. The value of LC50 respectively from Ae. aegypti and Cx. quinquefasciatus were 494.47 ppm and 243.33 ppm. Sambang colok leaf extract was potential as a mosquito larvicide.
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Judul: Grup dan Homomorfisma Grup pada Rubik Revenge
Abstrak: Rubik cube is a kind of puzzle game. A player must arrange rubik sides, which have been disordered, back to the position where every side has the same colour. This paper does not focus on the settlement solution, but instead on proving the existence of a group homomorphism between rubik movement group and S96 symmetric permutation group in rubik revenge. Firstly, it has been proved that rubik movement set is a group. Then, it also has been proved that the M set, which contains numeric labels of 1 until 96 in cubinos sides, is S96 symmetric permutation group.
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