Judul: Mempelajari Pengaruh Ekstrak Daun dan Rimpang Kunyit (Curcuma domestica Val) Terhadap Aktivitas Sitolitik Sel Natural Killer (NK) dalam Melisis Sel K-562 secara In Vitro
Abstrak: Kunyit (Curcuma domestica VaL) merupakan tanaman yang banyak digunakan sebagai bumbu masakan. disamping sebagai obat. Tanaman ini juga mengandung komponen aktif yang mempunyai aktivitas biologis. Penelitian ini bertujuan untuk mempelajari pengaruh ekstrak daun dan rim pang kunyit terhadap aktivitas sito!itik sel natural kil/ler (NK) dalam proses me!isis sel K-562. S21 NK merupakan subset sel limfosit yang berfungsi untuk menghancurkan sel kanker dan sel yang terinfeksi oleh virus secara langsung.
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Judul: Mempelajari pengaruh ekstrak rimpang jahe (Zingiber officinale roscoe) segar dan bertunas terhadap aktifitas sel natural killer manusia dalam melisis alur sel leukemia (K-562)
Abstrak: Penyakit kanker saat ini masih menjadi urutan kedua penyebab kematian tertinggi di dunia. Untuk itu berbagai upaya perlu dilakukan untuk mengurangi resiko kanker dengan mencari bahan anti kanker yang bersifat efektif dan aman. Alternatif bahan anti kanker tersebut dapat digali dari rempah-rempah yang selama ini telah banyak dimanfaatkan sebagai obat tradisional. Rimpang jahe telah dikenal sebagai obat tradisional untuk mengatasi influenza, reumatik, batuk, anti inflamasi dan lain-lain. Hal ini diduga berkaitan erat dengan kemampuan jahe dalam menstimulir respon imun. Efek stimulasinya dapat diuji dengan melihat pengaruh ekstrak jahe terhadap aktifitas sitolitik sel Natural Killer (NK) terhadap sel kanker. Pengujiannya ditentukan berdasarkan kemampuan sel NK sebagai sel efektor, dalam melisis sel kanker (K-562) yang merupakan sel target, pada medium kultur yang ditambahkan dengan ekstrak jahe. Ekstrak jahe yang diujikan adalah jahe segar dalam air (JSA), jahe bertunas dalain air (JBA), JSA berisi komponen di bawah 8.000 dalton (JSA<8 kD), JBA berisi komponen di bawah 8.000 dalton (JBA<8 kD), jahe segar dalam etanol (JSE) dan jahe bertunas dalam etanol (JBE)
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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