Judul: Optimasi konsentrasi kaldu limbah kepala patin pada Salinitas 3 gram/liter terhdap perkembangan larva ikan patin (Pangasius hypophthalamus)
Abstrak: Peralihan dari endogenous feeding ke exogenous feeding merupakan masa kritis dengan tingkat kelangsungan hidup larva rendah. Serta kegagalan dan keterlambatan larva untuk memulai aktivitas makan dan rendahnya daya pemangsaan dapat menyebabkan tingginya fase kematian pada larva. Oleh sebab itu perlu manipulasi pakan guna mendukung keberhasilan pembenihan dan kelangsungan hidup larva dengan pemberian nutrien berenergi yang larut dalam air (kaldu)
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Judul: Perkembangan enzim pencernaan larva ikan patin, pangasius hypophthalmus
Abstrak: Ikan patin, Pangasius hypophthalmus merupakan salah saatu ikan budidaya yang disukai banyak orang, Saat ini, dengan nilai dolar yang semakin tinggi, pada pembenihan ikan patin banyak dilakukan usaha untuk menekan biaya antara lain dengan mengurangi pemberian Artemia yang merupakan barang impor dengan cacing sebagai barang lokal. Salah satu cara yang dapat dilakukan adalah dengan menggeser skedul pemberian pakan bagi larva tersebut dan mempersingkat pemberian Artemia. Namun demikian penggeseran skedul ini diduga mengakibatkan penurunan kualitas benih ikan patin yang dihasilkan. Hal ini mungkin disebabkan oleh belum siapnya enzim pencernaan untuk menerima dan mencerna makanan tersebut. Penelitian ini dilakukan untuk mengetahui perkembangan enzim protease, lipase dan amilase saluran pencernaan larva patin, perkembangan histologis saluran pencernaan dan isi saluran pencernaan Pengamatan pertumbuhan panjang dan bobot tubuh, lebar bukaan mulut maksimum, kelangsungan hidup, fisika kimia dan biologi air juga dilakukan. Penelitian dilaksanakan pada bulan Oktober sampai Desember 2002, di Laboratorium Sistem dan Teknologi, Fakultas Perikanan dan Ilmu Kelautan, Institut Pertanian Bogor, Kampus Darmaga, Bogor. Asai enzim dilakukan di Laboratorium Mikrobiologi dan Biokimia, Pusat Antar Universitas Bioteknologi, Institut Pertanian Bogor, Kampus Darmaga, Bogor. Larva ikan patin, dipelihara mulai umur 1 hingga 15 hari dalam akuarium (60x50x40 cm) sebanyak 9 unit. Larva ditebar dengan kepadatan 1500 ekor/akuarium. Tiga perlakuan skedul pakan yang diberikan adalah skedul I Artemia 2-8 hari dan cacing 7-15 hari; skedul II: Artemia 2-6 hari dan cacing 5-15 hari; skedul III: Artemia 2-4 hari dan cacing 3-15 hari, sedangkan Chorella dibeikan 1-15 hari untuk semua skedul pemeliharaan. Rancangan yang digunakan adalah rancangan acak lengkap (RAL) dengan 3 perlakuan dan 3 ulangan....
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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