Judul: Mencit (Mus musculus) Sebagai Hewan Percobaan
Abstrak: Mencit (Mus Musculus ) mempunyai sejarah yang panjang dan pesat dalam perjalanan hidupnya sebagai hewan percoabaan. Dengan demikian berbagai upaya seperti domestikasi, seleksi, pemuliaan dan rekayasa genetik dalam perkembanganbiakan telah diperoleh sifat-sifat khusus yang berguna untuk penelitian ilmiah.
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Judul: Keberadaan fenomena kelenturan fenotipik sifat-sifat produksi dan reproduksi pada mencit (Mus musculus)
Abstrak: Penelitian ini dilakukan di Laboratorium Pemuliaan dan Genetika Ternak Fakultas Peternakan Institut Pertanian Bogor selama empat bulan, mulai bulan Januari sampai April 1996. Tujuan penelitian ini yaitu untuk mengetahui keberadaan kelenturan fenotipik pada beberapa sifat produksi dan reproduksi serta mengetahui nilai korelasi fenotipik antar sifat produksi dan nilai heritabilitasnya. Hewan yang digunakan untuk penelitian ini adalah mencit agouti, hitam dan albino sebanyak 540 ekor pada generasi pertama dan 730 ekor pada generasi kedua. Perlakuan pada mencit dilakukan dengan membedakan populasi (agouti, hitam dan albino), dan jenis kelamin (jantan dan betina). Perlakuan berupa ransum berprotein rendah (12%) dan ransum berprotein normal (20%). Peubah yang diamati yaitu jumlah dan bobot lahir, jumlah dan bobot sapih, jumlah dan bobot dewasa dan jumlah kematian mencit. Rancangan statistik yang digunakan yaitu rancangan acak lengkap pola faktorial 3 x 2 x 2. Untuk mengetahui keberadaan kelenturan fenotipik, digunakan analisis ragam dua arah. Kelenturan fenotipik dikatakan ada jika faktor ransum, nyata berpengaruh terhadap sifat yang diamati. Perbedaan kelenturan fenotipik antar populasi dinyatakan ada jika interaksi antara populasi dengan ransum mempunyai nilai peluang yang nyata. Nilai kelenturan fenotipik masing-masing populasi didapat dengan menghitung selisih antara rataan bobot badan gabungan jantan dan betina pada ransum kontrol dan perlakuan. Pada mencit agouti, hitam dan albino diamati adanya fenomena kelenturan fenotipik. Rataan nilai kelenturan fenotipik dari umur tiga sampai delapan minggu untuk mencit agouti, hitam dan albino adalah masing-masing 2,0619; 2,3093; 1,5486. Rataan nilai kelenturan fenotipik untuk semua populasi pada umur 3, 4, 5, 6, 7 dan 8 minggu berturut-turut adalah 0,2153; 0,7912; 1,2158; 3,0159; 3,4754 dan 3,1258. Korelasi fenotipik sifat yang diamati pada mencit antara bobot lahir dengan bobot sapih, bobot sapih dengan bobot dewasa dan bobot lahir dengan bobot dewasa mempunyai nilai berturut-turut 0,658; 0,540 dan 0,821, sehingga seleksi untuk bobot badan dapat dilakukan sejak lahir. Seleksi untuk sifat bobot sapih dan bobot dewasa akan memberikan respon seleksi yang tinggi karena heritabilitas sifat ini tinggi yaitu berturut-turut 0,32 dan 0,48.
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Judul: Characteristic of Overshooting Top (OT) Based on  Himawari  8  Satellite  as  a  Convective  Cloud  Feature  that  Generates  Extreme Weather in the Java Island Region
Abstrak: Overshooting Top (OT) is a feature at the top of a convective cloud that is associated with extreme weather. Research on OT in tropical Indonesia is still very limited. The existence of geostationary satellites with wide area coverage and fast frequency observations is useful for observing the fast dynamics of the OT life cycle. Therefore, this study intends to analyze the relationship between OT and extreme weather, updraft and thermodynamic conditions of OT when extreme weather occurs, the best objective method for detecting OT in the day time and night time, and the spatiotemporal distribution of OT in the tropical region of Java Island during the 2018-2021 period. Based on visual analysis using visible channel and Himawari 8 sandwich products, 87% of extreme weather events in Java were accompanied by the appearance of OT. It indicates that the presence of the OT pattern is a convection cloud pattern or feature that is closely related to extreme weather events for the Java Island region. The existence of a time lag between the appearance of OT and extreme weather events on Java Island indicates that the OT of convection cloud can be used as a precursor or nowcasting for the appearance of extreme weather. Most of the convective cloud OT features during extreme weather events on Java Island have altitude that were only able to exceed the altitude of the equilibrium level and few were able to exceed the tropopause level of 9 km – 16 km. The difference in atmospheric conditions during extreme weather events on Java Island, which is in the tropics and subtropics, is a strong and unstable convective energy condition characterized by a larger CAPE, as well as unstable KI, LI, SI and TTI values. It is offset by kinematic factors in the form of a weak vertical wind shear (bulk wind shear 0-6 km) and a higher freezing point height. The difference between extreme weather events in the Java Island region and other tropical regions compared to subtropical regions is the strong updraft speed of convection clouds. The IRW Texture COMB algorithm based on the IRW-Texture Gradient modification and the COMB algorithm shows a significant increase in quality for detecting OT and non-OT pixels in Java. Rainy days with rainfall > 50 mm/day are very common in areas with an altitude of > 500 m. On the other hand, the level of convection activity which is indicated by the presence of OT and lightning is significantly reduced in this area. OT of convective clouds appear more frequently during the DJF season and less frequently during the JJA season. OT often appears during the day time and rarely at night time. Most OTs appear in the central part, away from the south and north coasts of Java Island during the day, while OTs that appear near the south and north coasts of Java Island can appear in the morning or afternoon.
Keyword: convective clouds, extreme weather, Overshooting Tops, Himawari 8 Satellite