Judul: Efektivitas Ekstrak Buah Bintaro (Cerbera odollam) sebagai Larvasida Lalat Rumah (Musca domestica)
Abstrak: Cerbera odollam is known as bintaro in Indonesia. It is a poisonuous plant which is found at seaside, mangrove forest, and widely used to hold a high wave, prevent landslide, and as decorated plant. Bintaro has potential as a natural larvicide but there is no research about using bintaro to control Musca domestica’s larvae in Indonesia. The objective of this research is to measure effectiveness of bintaro as a larvicide of M. domestica. The parts of bintaro which is used for research were seeds and barks. Seeds and barks were extracted by methanol 96% and diluted by aquabidest. The concentration of extract divided to some groups, there was negative control which is only given aquadest, seeds extract 10, 30 , 60, 80 g/100 ml and barks extract 80 g/100 ml. Seeds and barks extract were tested to larvae groups. The result showed that seeds and barks extract of Bintaro can be used for larvicide. Seeds extract was more effective than barks extract. Phytochemical screening showed that alkaloids, flavonoids, saponins, tannins, and steroids were the secondary metabolite compounds contained in seeds and barks.
Keyword: seeds, Musca domestica, larvicide, Cerbera odollam, barks

Judul: Aktivitas Larvasida Ekstrak Bintaro (Cerbera manghas) Terhadap Larva Nyamuk Aedes aegypti (Diptera: Culicidae)
Abstrak: Dengue is a very dangerous disease and contagious because it causes deadth at short time on the patient. This desease was caused by dengue virus which was infected by Aedes aegypti. Plants have potency to develop as larvacide because itself containts chemical compound which have bioactive. Bintaro (Cerbera manghas) have been known as poisonous tree. The aim of this research is to know the activity of bintaro extract to larvae Ae. aegypti. First, we extracted a leaf, steam bark, kernel and rind of bintaro. Then the best extract was fracinated, after that it was done chromatography colom step. Futhermore, we did bioassay to larvae Ae. aegypti for every step. The result showed that kernel of bintaro have highest activity to mortality of larvae Ae. aegypti than steam bark, rind, and leaf; with LC50 517,3 ppm dan LC90 964,8 ppm. Ethyl acetate fraction have great activity to mortality of Ae. aegypti than n-hexane dan nonsoluble fraction with LC50 34,6 ppm dan LC90 95,1 ppm. We had 10 sub fractions in this research and the sub fraction 1, 7 and 10 had most toxic compound to Ae. aegypti than the others. The kernel extract contains saponim, alkaloid, flavonoid, triterfenoid glikosida and steroid.
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Judul: Solusi Geometri Schwarzschild untuk Dimensi 4+1 dengan Invarian Rotasi Isotropik
Abstrak: Metrik Schwarzschild merupakan solusi eksak pertama dari persamaan medan Einstein dengan mangasumsikan metrik statik dan simetris. Metrik Schwarzschild yang ditemukan oleh Karl Schwarzschild masih dalam dimensi 3+1, namun seiring dengan teori-teori terbaru yang menunjukkan bahwa alam semesta tidak hanya di dimensi 3+1. Maka melalui penambahan dimensi, tujuan penelitian ini memperoleh solusi pada geometri Schwarzschild untuk dimensi 4+1 dengan memodifikasi koordinat bola yang invarian rotasi isotropik dan melalui penurunan rumus seperti koordinat bola, simbol Christoffel, dan tensor Ricci. Selain mendapatkan solusi ini, metrik Schwarzschild dimensi 4+1 dapat digunakan sebagai metrik dasar untuk memperoleh solusi blackhole dan wormhole pada dimensi 4+1. Hasil akhirnya, dengan memanfaatkan modifikasi koordinat bola, metrik Schwarzschild dapat dibentuk sehingga diperoleh solusi geometri Schwarzschild untuk dimensi 4+1.
Keyword: metrik Schwarzschild, persamaan medan Einstein, modifikasi koordinat bola, penambahan dimensi, invarian rotasi isotropik