Judul: Pengaruh Kepadatan Larva Aedes aegypti dan Kekeringan Terhadap Survival dan Patogenisitas Cendawan Aspergillus niger.
Abstrak: The aim of the experiment was to study the effect of Aedes aegypti larval density and dryness on survival and pathogenicity of Aspergillus niger. The effect of larval density on survival and pathogenicity of A. niger was studied using instar III of A. aegypti larvae, whereas the effect of dryness was studied on A. aegypti egg. The survival and pathogenicity test of A. niger on A. aegypti larvae were carried out in unsterilized tap water. The fungi used was A. niger carrying gfp gene as a marker. The treatment of larval density used were 10, 50, 100, 150, and 200 larvae. The number and age of eggs used were 200 and a week-old, respectively. Parameters measured were number of A. niger colony, larval mortality, and eggs hatching. The result showed that fungal survival that indicated by number of colony reduced from 1x108 spores in first day to 225 spores in the second day and the reduction continued until 6 days after incubation to 30 spores. At 7 days incubation, the colony increased to 40 spores. A. niger had high pathogenicity on larvae and eggs of A. aegypti. The mortality of larvae at all treatments started at 3 days after inoculation. The mortality at 3 days after inoculation were 6.7, 9.3, 13.0, 18.0, and 21.5% at 10, 50, 100, 150, and 200 larval, respectively. The mortality increased at 14 days after inoculation. The values were 33.3, 38.7, 52.0, 54.4, and 58.5% at 10, 50, 100, 150, and 200 larval density treatment, respectively. The A. niger had high pathogenicity on A. aegypti eggs. All of eggs tested did not hatch after inoculated by A. niger and incubated for 14 days.
Keyword: 

Judul: Karakteristik Habitat Larva dan Status Resistensi Aedes aegypti (L) terhadap Sipermetrin dan Malation di Wilayah Perimeter Pelabuhan Laut Cirebon
Abstrak: Penyakit tular vektor seperti Demam Berdarah Dengue (DBD) masih merupakan masalah kesehatan utama di Indonesia termasuk di Kota Cirebon. Pelabuhan laut Cirebon sebagai salah satu pintu masuk negara berpotensi terhadap penularan penyakit DBD tersebut. Tujuan penelitian untuk mengukur kepadatan dan mendeterminasi karakteristik habitat larva Aedes aegypti, menganalisis hubungan faktor lingkungan (karakteristik habitat, suhu dan kelembapan udara), tingkat pengetahuan, sikap dan perilaku masyarakat dengan keberadaan larva Ae. aegypti dan mengukur status resistensi nyamuk Ae. aegypti terhadap insektisida malation dan sipermetrin. Jenis penelitian yaitu observasi deskriptif analitik dengan pendekatan cross sectional study dengan sampel seluruh rumah/ bangunan yang berada di wilayah perimeter Pelabuhan laut Cirebon. Faktor lingkungan, karakteristik habitat diukur dengan pengamatan secara visual terhadap jenis, letak, bahan, warna dan tutup kontainer serta volume air, jenis sumber air dan paparan cahaya pada kontainer. Suhu air diukur menggunakan termometer infra merah dan pH air menggunakan pH meter. Suhu dan kelembapan udara diukur menggunakan termohigrometer. Pengetahuan, sikap dan perilaku masyarakat diperoleh melalui wawancara menggunakan pedoman kuesioner terstruktur tentang pencegahan dan pengendalian vektor DBD. Koleksi larva dilakukan dengan metode single larvae dan morfologi Ae. aegypti diamati menggunakan mikroskop berdasarkan kunci identifikasi Aedes spp. Pengukuran status resistensi nyamuk Ae. aegypti terhadap insektisida malation 0.8% dan sipermetrin 0.05% menggunakan metode susceptibility test standar World Health Organization (WHO). Hasil penelitian, jumlah kontainer yang diamati sebanyak 486 kontainer dengan jenis kontainer positif larva Ae. aegypti yaitu bak kakus, bak mandi, drum, ember, kolam dan ban bekas. Keberadaan larva Ae. aegypti sebagian besar berada pada kontainer di luar rumah. Jenis kontainer yang paling banyak ditemukan yaitu ember dan perkiraan volume air pada kontainer sebagian besar lebih dari 20 L. Hasil perhitungan House Index (HI), Container Index (CI), Breteau Index (BI) dan Density Figure (DF) (HI:8.74%; CI:9.05%; BI:12.02; DF:3) dengan kategori kepadatan Ae. aegypti sedang. Berdasarkan hasil uji chi square, karakteristik habitat yang mempunyai hubungan signifikan dengan keberadaan larva Ae. aegypti yaitu jenis kontainer, bahan kontainer, volume air, sumber air, pH air dan suhu udara (p<0.05). Hasil analisis dengan binary logistic regression, variabel yang berpengaruh dan berisiko terhadap keberadaan larva Ae. aegypti yaitu jenis kontainer ember (p=0.003; OR=18.972) dan pH air (p=0.022; OR=2.489). Faktor pengetahuan, sikap dan perilaku masyarakat tidak berpengaruh terhadap keberadaan larva Ae. aegypti. Hasil uji resistensi nyamuk terhadap insektisida berdasarkan persentase kematian nyamuk di wilayah perimeter Pelabuhan laut Cirebon, status Ae. aegypti resisten terhadap malation dan sipermetrin.
Keyword: Aedes aegypti, karakteristik habitat, Pelabuhan laut Cirebon, resistensi

Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology