Judul: Tingkat Kebisingan di Tempat Terbuka dan di Lahan Bervegetasi
Abstrak: Pertumbuhan pembangunan di Indonesia dari tahun ke tahun semakin meningkat. Hal ini menyebabkan berkurangnya lahan yang bervegetasi (ruang terbuka hijau), karena lahannya telah berubah fungsi peruntukannya seperti perkantoran, industri dan permukiman. Secara tidak langsung tbgkat pencemaran udam semakin meningkat. Salah satu pencemaran udara adalah kebisingan.
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Judul: Kenyamanan Audial di Taman Kota Surabaya.
Abstrak: Kota Surabaya merupakan salah satu kota metropolitan di Indonesia. Luas RTH Kota Surabaya 20.74% dari luas total, sedangkan target luasan minimal yaitu 30% dari luas kota. Kondisi tersebut menimbulkan ketidaknyamanan lingkungan, salah satunya kebisingan. Taman kota dipercayai dapat mengendalikan kebisingan kota. Penelitian ini bertujuan mengukur tingkat kebisingan, menentukan efektivitas vegetasi, mengkaji persepsi dan preferensi pengunjung di taman kota. Pengukuran kebisingan diambil pada transek 2 taman kota (Taman Flora dan Kebun Bibit Wonorejo) dan lahan terbuka, transek tersebut tegak lurus dengan sumber bising yang dibedakan 3 titik pengukuran berdasarkan jarak 0 m, 25 m, 50 m dari sumber bising dan pengukuran faktor iklim yang mempengaruhi kebisingan. Alat yang digunakan yaitu sound level meter dan weather station. Berdasarkan hasil penelitian, nilai kebisingan menurun signifikan dari 0 m ke 50 m. Namun, vegetasi lebih efektif mereduksi kebisingan pada jarak 0 m ke 25 m, Taman Flora 41.27% dan Kebun Bibit Wonorejo 59.42%. Persepsi pengunjung di kedua lokasi merasa terganggu dengan kebisingan lalu lintas dan pengunjung lebih menginginkan upaya peningkatan kenyamanan audial dengan cara pembuatan taman kota.
Keyword: kebisingan, taman kota, vegetasi

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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