Judul: Potensi Disinfektan Sebagai Bahan Aktif untuk Sediaan Kastrasi pada Mencit.
Abstrak: Kastrasi kimiawi dapat digunakan sebagai alternatif dari kastrasi terbuka. Tujuan dari penelitian ini untuk menguji potensi bahan kimia disinfektan sebagai sediaan bahan kimia untuk kastrasi pada mencit. Penelitian ini menggunakan zat aktif disinfektan sebagai material kastrasi kimiawi pada mencit. Mencit dibagi menjadi 7 kelompok : kloroxylenol 4.8% (C4, n=4), povidon iodin 10% (P10, n=4), kloroxylenol 2.4% dan povidon iodin 5% (C2P5, n=4), kloroxylenol 1.2% dan povidon iodin 2.5% (C1P2, n=4), sodium hipoklorit (N5, n=4), NaCl 0.9% (N, n=4), dan akuadestilata (A, n=3). Disinfektan sebanyak 0,2 mL diinjeksi pada masing-masing testis pada setiap kelompok. Daya hidup mencit setelah kastrasi kimiawi pada kelompok perlakuan C4, C2P5, C1P2, kontrol A, dan kontrol N berada diantara 25-100%. Populasi mencit mati 100% dalam 24 jam pada kelompok perlakuan P10 dan sodium hipoklorit. Kastrasi kimiawi menggunakan disinfektan menyebabkan penurunan ukuran testis; perubahan profil eritsosit, limfosit relatif, neutrofil relatif; dan menyebabkan struktur anekhoik pada jaringan testis 7 hari setelah kastrasi kimiawi. Kombinasi kloroxylenol 1.2% dan povidon iodin 2.5% dapat digunakan sebagai agen kastrasi kimiawi pada mencit.
Keyword: mencit, kastrasi kimiawi, kloroxylenol, povidon iodin, sodium hipoklorit

Judul: Aplikasi Kastrasi Kimia Besi (III) Klorida Heksahidrat terhadap Kesuburan Kucing (Felis catus).
Abstrak: Populasi kucing yang melimpah menjadi permasalahan masyarakat. Kastrasi adalah salah satu metode pengendalian populasi kucing. Kastrasi metode bedah tidak ekonomis sehingga kastrasi kimia dapat menjadi solusi. Kualitas semen kucing (Felis catus) dievaluasi dalam penelitian ini pascainjeksi besi (III) klorida hexahidrat 0.2 ml/testikel intratestikel. Kastrasi terbuka dan pengamatan kualitas semen pada 16 ekor kucing jantan dilakukan pascainjeksi hari ke- 1 (N=4), 3 (N=4), 7 (N=4), dan 17 (N=4). Bobot testikel, volume testikel, dan panjang epididimis juga dievaluasi pascakastrasi terbuka. Hasil penelitian menunjukkan testikel dan epididimis belum atrofi hingga hari ke-17 pascainjeksi. Testikel dan epididimis kelompok kastrasi berwarna merah gelap hari ke-3 pascainjeksi. Konsentrasi spermatozoa dan persentase spermatozoa normal yang hidup hingga hari ke-17 pascainjeksi menurun secara nyata (P<0.05). Persentase spermatozoa normal yang mati hari ke-1 pascainjeksi meningkat secara nyata (P<0.05). Dag like defect hanya ditemukan pada kelompok kastrasi pada hari ke-1 dan ke-17 pascainjeksi. Kelainan spermatozoa bent midpiece banyak terjadi pada kelompok kastrasi. Namun bent midpiece tidak signifikan perbedaannya karena secara normal ada pada kelompok kastrasi. Larutan FeCl3 5 % menunjukkan potensi sebagai bahan kastrasi kimia pada kucing.
Keyword: FeCl3 5 %, kastrasi, semen, spermatozoa, testikel

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