Judul: Analisis Peningkatan Intensitas Cuaca Ekstrim Di JABOTA (Jakarta, Bogor, Tangerang) Periode 1980 - 2008
Abstrak: Pertumbuhan penduduk mempengaruhi perubahan penggunaan lahan terutama berkurang ruang terbuka hijau. Hal ini mempengaruhi naiknya suhu udara dan meningkatnya cuaca ekstrim. Penelitian di beberapa negara sudah terbukti adanya kenaikan suhu dan cuaca ekstrim sebagai akibat dari perubahan penggunaan lahan seperti Taiwan, Cina dan Jepang. Data yang di gunakan pengamatan cuaca harian stasiun Meteorologi sekitar Jabota kurun waktu antara tahun 1980-2008 dibagi menjadi dua periode (periode 1980-1997 dan 1998- 2008) dan dibandingkan untuk mengetahui peningkatan suhu dan cuaca ekstrim. Data pengamatan udara atas periode tahun 1988-2008 dibagi menjadi dua periode dan dibandingkan untuk mengetahui peningkatan suhu udara atas pada lapisan tertentu. Data cuaca setiap jam antara tahun 2003-2008, stasiun Curug sebagai contoh untuk menganalisis pergeseran waktu kejadian suhu maksimum dan waktu terjadinya badai petir. Hasil analisis menunjukkan adanya peningkatan suhu rata-rata pada periode kedua, meningkatnya frekuensi suhu di atas 34°C, meningkatnya frekuensi curah hujan ekstrim pada bulanbulan tertentu terutama pada bulan di musim hujan dan transisi, meningkatnya frekuensi kejadian badai petir, meningkatnya rata-rata suhu udara atas terutama pada lapisan permukaan hingga 500mb, terjadi pergeseran waktu suhu maksimum pada bulan-bulan tertentu di musim kemarau dan transisi pada dari pukul 13.00 mejadi pukul 14.00 wib dan waktu kejadian badai petir tertinggi antara pukul 15.00-17.00 wib dan pukul 19.00-20.00 wib
Keyword: land us e changes, increase temperature, extreme weather

Judul: Analysis of increasing ext reme weather intensity in Jabota (Jakarta, Bogor, Tangerang) Period 1980 - 2008
Abstrak: spaces. This changes causes rising of air temperatures and hence increasing frequent events of extreme weather. Based on research in Taiwan, China and Japan, its have been proven that the existence of rising temper ature and frequent extreme weather were caused by land use changes. Daily observed data from Meteorological Stations around urban area of Jabota during the period 1980-2008 was used to determine the increase of air temperature and the frequency of extreme weather events. Besides the surface air temperature, the upper air temperature data period 1988-2008 was also analysed data to examine the increase of air temperature at particular layer. Further, hourly weather data of 2003-2008 from Meteorological Stasion Curug has been used as an example to analyze the time shifts of maximum air temperature and the time of thunderstorms occurrence. The analysis resulted an increase in average temperature in the latest period; increasing frequency of temperatures above 34° C, the increasing frequency of extreme precipitation at some months, especially in the rainy and transition seasons; the increasing frequency of thunderstorms occurrence, the increase of average upper air temperature, especially at surface layer up to 500 mb layer. The results also showed that the maximum temperature occurrence at certain months in dry and transition season to 02: 00 pm and the mostly hour of thunderstorms occurrence was 03: 00 to 05: 00 and from 07: 00 to 08: 00 pm.
Keyword: 

Judul: Isolasi dan pemurnian bahan aktif dari mikroalga BTM 11 sebagai inhibitor RNA helikase virus hepatitis C
Abstrak: Hepatitis C virus is the cause of hepatitis C disease which has high virulence. Recent therapy using combination of ribavirin and alpha interferon has short efficiency < 80%. Thus, the discovery of new drug is needed. Antiviral drugs can be discovered through molecular target therapy by finding the inhibitor of RNA helicase that play role in viral replication. Inhibitor can be derived from chemical compound produced by microalgae. The aim of this research was to isolate the active compound from microalgae BTM 11 which had inhibitory activity against RNA helicase. Inhibitory activity was measured by releasing of phospate inorganic in colorimetric ATPase assay. Crude extract was fractionated using gel filtration chromatography with methanol in chloroform solvent. The result showed that Fraction 3 has the highest inhibitory activity which (81.205%). Phytochemical test of crude extract indicated positive flavonoids and coumarin. Thin layer chromatography (TLC) analysis with eluent chloroform: methanol gave 2 spots with Rf value of 0.8 and 0.37. Moreover, high performance liquid chromatography (HPLC) analysis showed absorption peak with the highest abundance at the retention time of 12.483 minute and 16.617 minute was 266 nm and 230 nm. According to these of phytochemical, TLC, and HPLC, inhibitor compound from BTM 11 belongs to flavonoids.
Keyword: