Judul: Spatial Distribution of Infiltration and Surface Runoff in Dramaga Campus of IPB University
Abstrak: IPB University Kampus Dramaga menempati lahan seluas 267 hektare, dengan tutupan yang dikategorikan ke dalam lahan terbangun, vegetasi, badan air. Seiring berjalannya waktu, pembangunan fisik kampus IPB University semakin meningkat. Dampak langsung pembangunan ini mempengaruhi siklus air, khususnya air hujan yang dapat meresap ke dalam tanah dalam bentuk infiltrasi. Peningkatan limpasan permukaan (surface runoff) merupakan salah satu konsekuensi dalam siklus air secara keseluruhan. Penelitian ini bertujuan untuk menganalisis dampak perubahan penggunaan lahan terhadap sebaran spasial infiltrasi dan limpasan permukaan dengan menggunakan metode skoring dan tumpang susun peta-peta tematik (overlay) didapatkan bahwa kapasitas infiltrasi di IPB University masih tergolong baik dengan luas lahan masuk kondisi baik sebesar 184,8 hektare atau 76,5% di tahun 2020 dan 181,1 hektare atau 75,2% di tahun 2022. Begitu pula limpasan permukaan yang umumnya masih dalam kategori normal dengan luas lahan sebesar 181,7 hektare atau 75,3% di tahun 2020 dan 179,7 hektare atau 74,5% di tahun 2022. Hasil penelitian ini diharapkan dapat digunakan untuk memberi masukan dalam pendugaan neraca air (water balance) kampus IPB University dan pengembangan Kampus, khususnya yang menyangkut tataruang secara keseluruhan.
Keyword: curah hujan, kemiringan lereng, overlay, penggunaan lahan, skoring

Judul: Rancangan Hidrolika Bangunan Pengendali Limpasan di Wilayah Kampus IPB Dramaga, Bogor
Abstrak: Bogor Agricultural University (IPB) stage III physical development is being implemented since 2011. Along with those development, the surface run-off was increased. The aim of these research were (1) to determine ECC-based on water balance, (2) to predict run-off (3) to do hydraulics design of runoff control structure. Based on water balance, environmental carrying capacity (ECC) was analysed, while run-off in IPB campus Dramaga was calculated by the rational method. Hydraulics design of run-off control structure was obtained by trial and error. The region can be divided into 14 catchment area (CA). The ratio of water availability and water demand was 0,9 hence the ECC of IPB Campus Dramaga was overshoot. Total discharge runoff to Campus IPB Dramaga was 5.66 m3/s. Discharge run-off in each CA was about 0.05 to 1.45 m3/s. Run-off control structure was needed to collect surfacerun-off hence increase water availability. Considering the topography and landuse, land and water conservation was needed in CA 4 and CA 9. CA 4 was suitable for reservoir which supported with sediment trap and drainage channel. CA 9 needed sediment trap for each inlet of Situ Leutik and bigger drainage holes along the side street.
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Judul: Peptides Hydrolysate Derived from Collagen of Snakehead Murrel (Channa striata) Skin Demonstrate Anti-oxidant and Anti-cholesterol Activities.
Abstrak: Anti-cholesterol and anti-oxidant play crucial role to combat cardiovascular disease (CVD) related to formation of arterial plagues from oxidation of cholesterol. In the past decades, research on bioactive peptides demonstrating anti-cholesterol and anti-oxidant activities have been reported as the alternative drugs. In this study, acid soluble collagen was extracted from the skin of snakehead murrel and employed to induce production of collagenase by Bacillus licheniformis F11.4. The collagenases secreted were in turn purified through AKTA Purifier (ion exchange, DEAE column) and used to produce peptides hydrolysate. The purified enzymes were grouped in two distinct collagenase fractions, designated as fraction D and F. Peptides hydrolysate produced by the fraction D was found to demonstrate HMG-CoA inhibitor activity comparable to pravastatin and limited anti-oxidant activity. Meanwhile, peptides hydrolysate generated using the fraction F demonstrated anti-oxidant activity comparable to BHT (2mM), vitamin C (2mM) and vitamin E (2mM), but limited HMG-CoA activity. Combination of the fraction D and F resulted in substantial HMG-CoA inhibition and anti-oxidant activities.
Keyword: Anti-cholesterol, anti-oxidant, bioactive peptide, collagen, collagenase, snakehead murrel