Judul: Usaha-usaha penguasaan proses fertilisasi untuk memperoleh keturunan dengan jenis kelamin yang dikehendaki
Abstrak: Penulisan skripsi ini bertujuan mengemukakan usaha apa saja yang dilakukan oleh para ilmuwan untuk memperoleh keturunan dengan jenis kelamin yang dikehendaki dan kesulit an-kesulitan yang dihadapi. Usaha yang dilakukan diantaranya adalah usaha pemisah an kedua jenis spermatozoa X dan Y. Dengan terpisahnya ke- dua jenis spermatozoa, maka genotip zigot pada proses ferti lisasi diatur dengan jalan mendepositkan spermatozoa X atau Y yang telah terpisah. Kemudian usaha lain adalah usaha untuk menyeleksi embrio pra-implantasi pada prosedur pelaksanaan embrio transfer. Jenis kelamin embrio pra-implantasi dise- leksi sebelum ditranfer kepada resipien. Pada percobaan pemisahan spermatozoa X dan Y cara yang dipakai adalah cara sentrifugasi, filtrasi, sedimentasi dan elektroforesis. Ternyata banyak spermatozoa yang berkurang kemampuannya untuk membuahi ovum setelah dikenakan perlakuan prosedur percobaan, akibatnya angka kebuntingan menurun dengan tajam sekali. Sedangkan usaha penyeleksian embrio pra- implantasi ternyata dapat membawa akibat cacat lahir. Oleh karena itu akibat buruk tersebut dihindarkan dengan cara memperbaiki dan memperbarui teknik yang telah dipakai….
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Judul: Penentuan jenis kelamin embrio
Abstrak: Penulisan skripsi ini bertujuan mengemukakan usaha- usaha yang dilakukan oleh para ilmuwan untuk memperoleh keturunan dengan jenis kelamin yang dikehendaki dan kesulitan-kesulitan yang dihadapi. niversity Usaha yang dilakukan diantaranya adalah pemisahan kedua jenis spermatozoa X dan Y. Dengan terpisahnya kedua jenis spermatozoa, maka genotip zigot pada proses fertilisasi diatur dengan jalan mendepositkan spermatozoa X dan Y. Kemudian usaha lain adalah menyeleksi embrio pra-implantasi pada prosedur pelaksanaan transfer embrio. Jenis kelamin embrio pra-implantasi diseleksi sebelum di transfer ke resipien. Pada percobaan penentuan jenis kelamin embrio cara yang dipakai adalah cara identifikasi khromatin kelamin dan badan Y, analisis khromosom dan deteksi antigen H-Y. Ternyata usaha seleksi embrio primplantasi dapat membawa cacat lahir dan angka kebuntingan masih sangat rendah. Dengan adanya teknik-teknik yang canggih dapat dihindarkan dan diperbaiki teknik-teknik yang telah dipakai…
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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