Judul: Studi Subsitusi Ransum Komersial Dengan Zeolit Terhadap Persentase Karkas, Giblet Dan Lemak Abdominal Broiler Pada Dua Kepadatan Kandang
Abstrak: Penelitian ini dilakukan di Laboratorium Ilmu Produksi Ternak Unggas, Jurusan Ilmu Produksi Ternak, Fakultas Peternakan, Institut Pertanian Bogor. Berlangsung selama enam minggu, sejak 14 Oktober sampai 25 Nopember 1992. Tujuan penelitian ialah untuk mengetahui sejauh mana zeolit dapat dimanfaatkan sebagai pengganti sebagian ransum kornersial terhadap rataan persentase karkas, giblet dan lemak abdominal broiler, sebagai peubahnya. Materi penelitian terdiri atas 330 ekor anak ayam broiler umur sehari (DOC) strain Lohmann, sedangkan ransum yang disubstitusi adalah ransum komersial Comfeed.
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Judul: Studi pengaruh substitusi ransum dengan zeolit dan penaburannya dalam litter terhadap karkas dan non karkas ayam broiler
Abstrak: Zeolit sebagai salah satu sumber daya alam Indonesia mempunyai sifat khas sebagai penyerap molekul dan penukar kation. Pada saat ini zeolit banyak digunakan untuk campuran makanan ternak yang berfungsi sebagai mineral yang sangat dibutuhkan untuk pertumbuhan dan perkembangan. Beberapa penelitian telah membuktikan bahwa penggunaan zeolit dalam bidang peternakan dapat meningkatkan produksi ternak dan efisiensi usaha. Berdasarkan pada sifat zeolit yang memiliki kapasitas yang tinggi sebagai penyerap, penaburan zeolit dalam litter pada taraf 2,5 dan 5,0 kg 2 per m² menurunkan kelembaban litter sebesar masing-masing 8,7 dan 10,9% bila dibandingkan dengan tanpa penggunaan zeolit. Penelitian ini bertujuan untuk mengetahui pengaruh zeolit dalam ransum dan litter terhadap bobot karkas, per- sentase karkas, giblet, hati, rempela, lemak abdominal dan kualitas dada ayam broiler. Penelitian ini dilakukan selama lima minggu mulai Desember 1992 sampai Januari 1993 di Laboratorium Ilmu Produksi Ternak Unggas, Jurusan Ilmu Produksi Ternak, Fakultas Peternakan Institut Pertanian Bogor. Ternak yang digunakan adalah anak ayam broiler umur sehari (DOC) galur Lohmann. Ransum yang digunakan adalah ransum komersial. Rancangan percobaan yang digunakan dalam penelitian ini adalah Rancangan Acak Lengkap Pola Faktorial 3x3 dengan tiga faktor taraf pemberian zeolit dalam ransum yaitu 0,0, 3,0 dan 6,0% serta tiga faktor taraf pemberian Pember zeolit dalam litter yaitu 0,0, 2,5 dan 5,0 kg/m² masing- masing dengan tiga ulangan. Hasil penelitian memperlihatkan bahwa substitusi ransum dengan zeolit pada taraf 3,0% berpengaruh sangat nyata (P<0,01) meningkatkan persentase bobot karkas tanpa giblet ayam broiler. Rataan persentase bobot karkas tanpa giblet pada pemberian tiga persen zeolit dalam ransum...
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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