Judul: Pemodelan pengaruh jarak jangkau ruang terbuka hijau terhadap suhu permukaan di perkotaan (  studi kasus : kota Bogor )
Abstrak: This research was conducted in Bogor, located at 106o48'40'' E-106o46'22'' E and 6o30'53''S -6o40'08'' S. The research aimed at determining the influence of greenspace distance on micro climate especially on surface temperature, and therefore the effective distance of greenspace can be determined for urban spatial planning consideration. Urban surface temperature is the function of energy balance components and greenspace distance. Information of greenspace was derived from satellite image of Landsat 5 TM +.The image wa classified into seven land cover types i.e water bodies, constructed land, bush, paddy field (sawah), high vegetation, field (ladang), and oil palm. Distance to each greenspace type (bush, paddy field, high vegetation, field, and palm), were calculated using Euclidean distance principle. Energy balance components of each land cover class that include net radiation (Rn), soil heat flux (G), sensible heat flux (H), and latent heat flux (LE) were extracted from band 1,2,3 and 6 of Landsat 5 TM image data.
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Judul: Spatial Modeling of land surface temperature and its relationship wityh ecological factors in Bogor municipilaty
Abstrak: Salah satu parameter kunci permukaan bumi melalui proses pertukaran energi dan air dengan udara disebut sebagai Suhu Permukaan Tanah (SPT), SPT juga memainkan peranan penting dalam berbagai penelitian ilmiah, seperti ekologi, hidrologi, dan studi perubahan global. Struktur buatan manusia seperti jalan dan bangunan biasanya memiliki nilai albedo yang lebih rendah dari permukaan bumi dan menyerap lebih banyak radiasi sinar tampak. Hal ini menunjukkan bahwa penurunan dan peningkatan jumlah vegetasi pada permukaan bumi wilayah perkotaan akan menyebabkan efek pulau panas. Tujuan penelitian ini adalah untuk membangun permodelan spasial suhu permukaan tanah di Kota Bogor menggunakan citra satelit Landsat-8, dan untuk mengidentifikasi hubungannya dengan faktor-faktor ekologi. Algoritma Split-Window (SW) digunakan untuk membuat SPT dengan menggunakan input berupa suhu kecerahan, emisivitas permukaan tanah (EPT) dan uap air. Validasi citra dilakukan untuk mengevaluasi nilai SPT dihitung dari citra satelit tahun 2014 Kota Bogor dengan pengukuran suhu lapangan yang dilakukan selama bulan Maret 2015 pada tanggal 2, 4, 7, 9, 11, 14, 16, 18, 21, 23, 25, 28 dan 30., One of the key parameter in the physics of the earth surface through the process of energy and water exchange with the atmosphere called as the Land Surface Temperature (LST), it also plays an important role in a wide variety of scientific studies, such as ecology, hydrology, and global change studies. Man-made structures such as roads and buildings typically have a lower albedo than the natural surface and absorb more visible radiation. This shows that the reduced of the vegetation and the increased in urban surface will cause heat island effect. The objective of this study are to develop spatial modeling the land surface temperature distribution in Bogor Municipality using landsat-8 satellite imagery, and to identify its relationship with the ecological factors. Split-Window (SW) Algorithm was used to derive the LST by using the inputs of the brightness temperature, land surface emissivity (LSE) and water vapor. The image validation was done to evaluate the relationships among LST calculated from a 2014 satellite image of the Bogor Municipality and ground-based temperature measurements monitored during the month of March 2015 at a specific date of 2, 4, 7, 9, 11, 14, 16, 18, 21, 23, 25, 28 and 30.
Keyword: Land Surface Temperature, Land Surface Emissivity, Split-Window, ecological factors, land cover

Judul: Pemurnian dan karakterisasi protein inhibitor RNA helikase virus hepatitis C
Abstrak: Hepatitis C virus (HCV) infection is the second most common chronic viral infection in the world with global prevalence. This infection is contribution to chronic hepatitis and liver cirrhosis, often leading to hepatocellular carcinoma. There is no effective drug and vaccine available against HCV. The current standard treatment, a combination of pegylated interferon-α with ribavirin, is limited by its suboptimal response rate in a significant patient population, side effects, and affordability. Therefore, development of effective drug is needed. One approach to find out the candidate of antiviral drug is to discover the inhibitor of enzyme that essential for virus replication, such as RNA helicase. Streptomyces chartreusis 5-095 produce the inhibitor of HCV RNA helicase. The aim of this study was to purify the protein inhibitor which has inhibition activity against ATPase activity of RNA helicase HCV from S. chartreusis 5-095. The supernatant of culture S. chartreusis 5-095 exhibited high inhibiton activity against ATPase activity of RNA helicase HCV (approximately 72%) at 10 days of incubation. The extracellular protein inhibitor was partially purified by procedures of precipitation with ammonium sulfate to 65% saturation and gel filtration (Sephadex G50) using methanol water solution (4:6) as an eluen. The purity of protein inhibitor was monitored by SDS PAGE. The protein inhibitor showed a relative molecular mass were estimated to be 14 kDa and increased the purity 23,08 fold than those of the crude protein. The specific activity and IC50 after purification were 13,1338 U/mg and 0,0767 mg/mL, respectively. The activity of purified protein inhibitor showed its stability over pH range from 5-8 and optimum at pH 7,4. The inhibition activity showed its stability up to 70% at temperature 100 oC. The purified protein inhibitor relatively stable its activity at storage in the range of -20 oC to room temperature for 35 days.
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