Judul: Evaluation of Drainage Channels at Bubulak Terminal, West Bogor District, Bogor City
Abstrak: Pembangunan infrastruktur dalam sebuah daerah dapat mengurangi daerah resapan air hujan, sehingga diperlukan infrastruktur pendukung seperti saluran drainase. Genangan pada suatu wilayah berdampak pada aktivitas masyarakat yang terganggu. Berdasarkan hasil pengamatan yang dilakukan di Terminal Bubulak, adanya genangan mengganggu kenyamanan masyarakat yang menggunakan fasilitas publik tersebut. Selain itu, jalan pada terminal rusak akibat sering tergenang air pada saat hujan. Kondisi saluran drainase pada Terminal Bubulak mengalami beberapa masalah, seperti tersumbat oleh sampah dan sedimen serta kondisi saluran yang rusak. Selain itu, saat terjadi hujan deras luapan air mengakibatkan banjir pada beberapa titik di area terminal. Perlu dilakukan evaluasi saluran drainase pada Terminal Bubulak untuk mengetahui penyebab genangan serta dimensi saluran drainase yang optimal. Berdasarkan hasil perhitungan perlu dilakukan perbaikan pada saluran 1, saluran 2, saluran 4, dan saluran 5. Desain pada saluran yang direncanakan dibuat menggunakan pasangan batu dengan dimensi 130x165 cm, 70x80 cm, 70x85 cm, dan 90x125 cm. Rencana anggaran biaya (RAB) untuk perbaikan saluran drainase sebesar Rp. 274.073.000. Biaya tersebut termasuk profit dan overhead sebanyak 15% untuk tiap uraian pekerjaan.
Keyword: drainage, flood, puddle, rainfall

Judul: Evaluation of Drainage Channels on Gardu Raya Road, Bogor City, West Java
Abstrak: Dalam pembangunan jalan raya, diperlukan prasarana berupa sistem drainase yang baik. Salah satu wilayah Kota Bogor yang mengalami masalah sistem saluran drainase adalah Jalan Gardu Raya. Permasalahan yang seringkali terjadi di wilayah ini adalah genangan air ketika curah hujan tinggi. Berdasarkan permasalahan yang telah disebutkan, penelitian ini bertujuan melakukan evaluasi kondisi saluran drainase di Jalan Gardu Raya, menentukan kapasitas saluran yang sesuai dengan limpasan yang terjadi serta menghasilkan desain saluran yang sesuai dengan kondisi lokasi penelitian. Evaluasi saluran drainase dilakukan menggunakan Software EPA SWMM 5.2. Perhitungan dilakukan dengan metode Log Pearson III dengan nilai curah hujan rencana sebesar 135,11 mm dengan periode ulang 2 tahun. Melalui pemodelan menggunakan EPA SWMM 5.2 didapatkan bahwa lokasi peneltian memiliki 34 subcatchment, 45 conduit, 45 junction dan 2 outfall. Berdasarkan hasil simulasi didapatkan bahwa terdapat saluran yang perlu diperbaiki dengan mengubah dimensi lebar saluran menjadi 0,60 m dan kedalaman 0,80 m. Serta perlu dilakukan galian tanah untuk mengatasi perbedaan elevasi pada saluran dari 188,4 mdpl menjadi 187,4 mdpl., In the construction of highway, infrastructure is needed in the form of a good drainage system. One of the areas in Bogor City that is experiencing problems with the drainage system is Gardu Raya Road. A problem that often occurs in this area is waterlogging when rainfall is high. Based on the problems mentioned, this research aims to evaluate the condition of the drainage channels on Gardu Raya Road, determine the channel capacity according to the runoff that occurs and produce a channel design that suits the conditions of the research location. Drainage channel evaluation was carried out using EPA SWMM 5.2 Software. Calculations were carried out using the Log Pearson III method with a planned rainfall value of 135,11 mm with a return period of 2 years. The simulation results show that the research location has 34 subcatchments, 45 conduits, 45 junctions and 2 outfalls. Based on the simulation results, it was found that there were channels that needed to be repaired by changing the dimensions of the channel width to 0,60 m and depth to 0,80 m. And it is necessary to excavate the land to overcome the elevation difference in the channel from 188,4 masl to 187,4 masl.
Keyword: curah hujan, drainase, epa swmm

Judul: Extraction and Characteristic of Collagen and Nanoparticle Collagen from the Skin of Stingray Fish (Pastinachus solocirostris) as Ingredient of Cosmetics.
Abstrak: Isolation of collagen from the skin of stingray fish (Pastinachus solocirostris) has been successfully conducted with three stages: first soaked in 0.05 M NaOH with a sample/solution ratio of 1:10 (w/v) for 6 hour, second soaked in 0.1 M acetic acid with a sample/solution ratio of 1:6 (w/v) for 2 hour, and third extraction with destilated water at temperature 40 C for 2 hour with a yield of 14.475 % (wet base). Nanoparticle collagen was made with desolvation method using etanol as a desolvating agent with a collagen solution/etanol ratio of 1:1. Yield of nanoparticle collagen was 9.64% (wet base) with particle size of 185.24 nm. Collagen and nanoparticle collagen is in the form of white powder with whiteness degree 72.48% and 60.03%, respectively. Protein is the major component in collagen and nanoparticle collagen (86.97% and 86.18%) with trace amount of ash (0.17% and 0.13%) and fat (0.19% and 0.25%), respectively. Based on sodium dodecyl sulfate-polyacrylamide gel electrophoresis patterns, amino acid composition, and fourier transform infrared (FTIR) spectra of both collagen and nanoparticle collagen were characterized as type I collagens. Nanostructural analysis of collagen and nanoparticle collagen by Scanning Electron Microscopy (SEM) shows that both were separate aggregates. Other characteristics of collagen and nanoparticle collagen were: Tmax of 165.88 C and 156.63 C; Viscosity 292.33 cP dan 110 cP; pH 5.00 dan 4.93; respectively. Collagen has highest solubility at pH 7 and the isoelectric point at pH 6, 9, and 10. Therefore, nanoparticle collagen has highest solubility at pH 3 dan and the isoelectric point at pH 6. Collagen and nanoparticle collagen from skin of stingray fish (Pastinachus solocirostris) has a characteristic for a potential use as a cosmetic ingredient.
Keyword: