Judul: Pengaruh berbagai konsentrasi gliserol dan lama penyimpanan terhadap motilitas sperma manusia yang di bekukan dalam bentuk butiran
Abstrak: Tujuan penelitian ialah untuk mengetahui sampai sejauh mana pengaruh perbedaan konsentrasi gliserol dan lama penyimpanan semen terhadap persentase dan kecepatan sperma yang bergerak kembali setelah dibekukan dalam bentuk butiran. Semen yang dipakai dalam penelitian ini berasal dari delapan pria normal. Untuk keperluan pembekuan diperguna- kan tiga macam pengencer yang masing-masing mengandung 5, 7,5 dan 10% gliscrol. Semen diencerkan tiga kali, kemudian dibekukan di atas lempengan CO₂ padat (-79°c) selanjutnya disimpan dalam N₂ cair (-196°c). Pemeriksaan motilitas dilakukan setelah semen beku disimpan selama 0, 1, 2, 3, 4, 5 dan 6 minggu. Hasil penelitian menunjukkan bahwa Daya hidup sperma tidak hilang sama sekali setelah mengalami pembekuan, namun persentase dan kecepatan sperma yang bergerak kemba- li mengalami penurunan. Persentase sperma yang bergerak kembali menurun sangat nyata pada periode penyimpanan 0, 1, 2 dan 3 minggu, seterusnya tidak terlihat adanya penurunan yang nyata. Sedangkan penurunan kecepatan sperma terjadi pada periode penyimpanan 0, 1 dan 2 minggu, setelah periode 2 minggu tidak banyak mengalami perubahan. Konsentrasi gliserol 5 dan 7,5 % memberikan perlindungan terhadap sperma yang lebih baik daripada konsentrasi 10 %. Interaksi antara konsentrasi gliserol dan lama penyimpanan tidak nyata.
Keyword: Semen beku, Spermatozoa, Bahan pelindung sperma, Motilitas sperma

Judul: Peranan berbagai konsentrasi gliserol pada pengencer skim glukosa terhadap kualitas semen beku kuda
Abstrak: Gliserol adalah krioprotektan yang umum dipakai pada pembekuan semen mamalia. KOnsentrasi gliserol yang terlalu tinggi akan bersifat toksisk, sebaliknya konsentrasi yang terlalu rendah akan mengurangi daya protektifnya. Penelitian ini bertujuan untuk menentukan konsentrasi gliserol yang paling tepat menggunakan pengencer skim glukosa dalam mempertahankan motilitas serta viabilitas spermatozoa pada semen beku kuda. Semen dikoleksi ari tiga eor kuda jantan menggunakan vagina buatan yang dilengkapi kain kasa untuk menyaring fraksi gelnya, kemudian evaluasi secara makro dan mikroskopik.
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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