Judul: Peranan Zn-Fitat dalam menyediakan Zn dan pengaruhnya terhadap absorpsi Pb ransum pada domba
Abstrak: Asam fitat banyak terdapat dalam biji-bijian. Senyawa ini dapat mengikat kuat Pb dan Zn. Seng merupakan mineral esensial untuk hewan, tetapi absorpsinya di saluran pencernaan sangat rendah. Suplementasi Zn dapat dilakukan dalam berbagai bentuk.
Keyword: 

Judul: Studi penambahan mineral seng (Zn) pada pakan domba ekor tipis
Abstrak: Serat yang berasal dari hijauan dapat dimanfaatkan ruminansia secara maksimal sebagai sumber energi, apabila lingkungan dalam rumen sesuai untuk perkembangan mikroorganisme. Mineral merupakan salah satu nutrisi yang esensial bagi mikroorganisme untuk aktifitas yang optimal (Church, 1983) dan seng (Zn) merupakan mineral yang dapat menstimulasi aktifitas mikroorganisme rumen, terutama bakteri selulolitik (Matturi, 1984). Tujuan penelitian ini adalah mempelajari pengaruh penambahan Zn terhadap konsumsi dan kecernaan bahan kering (BK), bahan organik (BO), protein kasar (PK); serat (NDF); konsumsi Zn; pertambahan berat badan; efisiensi penggunaan pakan dan kandungan mineral Zn dalam cairan rumen dan serum darah domba. Penelitian ini dilakukan di Balai Penelitian Ternak, Bogor dari bulan Desember 1994 sampai bulan Maret 1995. Ternak yang digunakan adalah domba lokal (Ekor Tipis) dengan berat badan 16,8-33,6 kg, terdiri dari 8 ekor jantan dan 4 ekor betina yang dikelompokkan menurut berat badan dan jenis kelamin, ke dalam 3 kelompok. Perlakuan yang diberikan adalah penambahan Campuran Mineral Lengkap (CML) (0 dan 4%) dan elemen tunggal mineral Zn (0 dan 10 ppm) dalam konsentrat yang diberikan. Ransum Basal ter- diri dari konsentrat (diberikan 1,5% berat badan) dan rumput Raja (diberikan ad libitum). Rancangan percobaan yang digunakan, yaitu Rancangan Acak Kelompok (RAK) pola Faktorial (2x2x3) dan pengaruh perlakuan diuji dengan sidik ragam (Steel dan Torrie, 1991). Hasil percobaan menunjukkan bahwa penambahan CML dan Zn nyata meningkatkan konsumsi Zn (p<0,05), tetapi tidak meningkatkan konsumsi dan kecernaan BK, BO, PK, dan NDF; pertambahan berat badan; efisiensi penggunaan pakan dan kandungan Zn terlarut dalam cairan rumen dan serum darah domba. Kesimpulan yang dapat diambil adalah bahwa penambahan Zn sebanyak 5 20 ppm pada pakan domba yang memenuhi kebutuhan (24,74 ppm Zn) tidak meningkatkan konsumsi dan kecernaan BK, BO, PK, serat (NDF); pertambahan berat badan; efisiensi penggunaan pakan, dan kandungan Zn dalam cairan rumen dan serum darah.
Keyword: 

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