Judul: Peranan Seng Sebagai Mineral Essensial dan Pengaruhnya Bagi Ternak Sapi
Abstrak: Telah lama diketahui bahwa mineral mempunyai peranan yang penting dalam proses kehidupan dan perkembangan tubuh. Tidak kurang dari 15 unsur mineral telah diketahui mempunyai fungsi essensial dalam tubuh. Hewan tidak dapat membuat mineral, karenanya harus disediakan dalam pakannya dan dalam perbandingan yang tepat serta dalam jumlah yang cukup. Salah satu dari kelima belas mineral tersebut adalah Seng (Zn), yang mempunyai fungsi sangat penting bagi tanaman dan binatang. Kandungan seng di dalam tubuh hewan seba- nyak 3 mg persen. Jumlah terbanyak terdapat dalam jaringan epidermal dan terdapat dalam jumlah yang sedikit pada tulang, otot dan darah. Dalam darah, seng ditemukan dalam sel eri- trosit, leukosit, plasma darah dan platelets. Pada hewan, seng mempengaruhi pertumbuhan badan, perkembangan alat-alat reproduksi, pembentukan darah dan tulang, proses-proses perbaikan jaringan dan persembuhan luka. Dalam kaitannya dengan enzim, seng membentuk metalloenzim seperti karbonik anhidrase, karboksipeptidase pankreas, dehidrogenase glutamat, retinen reduktase dan lain sebagainya. Usus halus merupakan tempat utama bagi penyerapan seng dengan duodenum sebagai bagian yang paling aktif. Penyerapan seng dibantu dengan adanya molekul yang mempunyai berat molekul yang rendah (kurang dari 1 500 Dalton) yang dinamakan Zinc Binding Ligand (ZnBl), Ikatan tersebut antara lain: sistein, histidin, asam pikolinat dan prostaglandin E2. Gejala klinis yang tampak pada defisiensi yaitu: pertumbuhan yang terlambat/terbelakang, kelainan pada tulang/ persendian, penyakit kulit/parakeratosis, kelainan pada bulu/rambut, effisiensi penggunaan makanan yang menurun, gangguan pada sistem reproduksi, gangguan pada sistem pencernaan dan kematian pada defisiensi yang parah. Sedangkan gejala keracunan seng ialah terjadinya muntah yang hebat, defekasi yang terus menerus dan kesakitan abdominal…dst
Keyword: 

Judul: IPB (Bogor Agricultural University)
Abstrak: Seng (Zn) adalah zat gizi esensial yang termasuk kelompok mikromineral yang diperlukan tubuh dalam jumlah yang sedikit. Peranan seng dalam tubuh sangat luas dan penting, dan terdapat 200 metalloenzim yang tergantung kepada logam seng. Defisiensi seng dapat mempengaruhi pertumbuhan fisik, seksual, mengurangi daya konsentrasi (mudah mengantuk), mengurangi daya penyembuhan luka, ketajaman pengecap (rasa), kulit kering clan kasar, anemia dan lain-lain.
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