Judul: Synthesis and Characterization of Cellulose  Acetate Membrane from Cigarette Filters with The Addition of Polyethylene  Glycol (PEG)
Abstrak: Membran adalah lembaran tipis yang selektif dan semipermeabel berbahan organik maupun anorganik yang biasa digunakan dalam proses pemisahan zat. Membran selulosa asetat merupakan membran anorganik yang termasuk ke dalam membran ultrafiltrasi dan biasa digunakan dalam filtrasi air skala besar maupun kecil karena teknologinya yang sederhana. Dalam skala kecil selulosa asetat komersial dapat digantikan dengan filter rokok yang ada di sekitar dan mudah didapatkan. Polietilen glikol diperlukan sebagai zat aditif yang berperan dalam peningkatan kualitas membran. PEG ditambahkan pada larutan membran dengan konsentrasi 10, 20, 30, 40, dan 50%. Membran dikarakterisasi dengan permeabilitas, kekuatan mekanik, porositas, analisis gugus fungsi, dan morfologi permukaan membran. Karakterisasi permeabilitas membran dilakukan dengan pengujian fluks air sistem dead-end. Membran tanpa penambahan PEG mulai mengalami fouling setelah waktu filtrasi mencapai 2 jam. Kekuatan mekaniknya dianalisis dengan elastisitas dimana membran dengan penambahan PEG 40% memiliki modulus Young paling rendah yang berarti elastisitasnya paling tinggi. Kualitas membran paling baik adalah membran dengan ketahanan terhadap bakteri, fluks air tanpa fouling, elastisitas paling tinggi, serta porositas efektif yang besar. Dengan penambahan konsentrasi PEG sebesar 40%, kualitas membran selulosa asetat mampu ditingkatkan sebagai filtrasi air., Membranes are selectively thin, semi-permeable sheets. Neither organic nor inorganic are commonly used in the process of separating substances. Acetate cellulose membrane is an inorganic membrane that is included in ultrafiltration membranes are commonly used in large-scale water filtration. It's small because of its simple technology. In small scale cellulose acetate commercial can be replaced by cigarette filters that are around and easy got it. Polyethylene glycol is needed as an additive that plays a role in improved membrane quality. PEG is added to the membrane solution with concentrations of 10, 20, 30, 40, and 50%. Membranes are characterized by permeability, mechanical strength, porosity, function cluster analysis, and morphology membrane surface. Membrane permeability characterization is done with dead-end system water flow testing. Membrane without adding PEG starts fouling after the filtering time reaches 2 hours. analyzed with elasticity where the membrane with the addition of 40% PEG has the lowest Young’s modulus which means the highest elasticity. The best membrane quality is a membrane with resistance to bacteria, water flow without fouling, highest elasticity, as well as effective porosity With a 40% increase in PEG concentration, the quality of the membrane cellulose acetate can be enhanced as water filtration.
Keyword: cellulose acetate, cigarette filters, filtration, membrane, PEG

Judul: Pengaruh Penambahan Polietilenglikol (PEG) Terhadap Karakteristik Membran Selulosa Asetat
Abstrak: Penggunaan membran, dalam proses pemisahan memiliki beberapa keunggulan dibandingkan dengan pemisahan secara tradisional. Pemisahan dengan membran tidak membutuhkan energi yang besar, sederhana dalam pengoperasian, tidak memerlukan bahan kimia tambahan dalam prosesnya, ramah lingkungan dan memiliki kualitas hasil lebih baik dibandingkan dengan proses pemisahan tradisional
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Judul: Pengelolaan Rusa Sambar (Cervus unicolor equinus Kerr, 1972) di Taman Margasatwa Ragunan, Jakarta Selatan
Abstrak: Distribution of Sambar deer in Indonesia, Sambar deer spreads in Kalimantan island and Sumatera island. Their home land has been disturbed and threatened because of land degradation and wild hunt so they need to be consevationed. The goal of this research is to know the management technique of sambar deer. This research is taken in Taman Margasatwa Ragunan (TMR) on March untill April in 2013. The research method takes three steps, field observation, literature study and interviewer. Data analysis of descriptive and quantitative. From the results of the study revealed that population of rusa sambar in 2013 10 for sub-types (Cervus unicolor equinus). Sex ratio 1:2 show that it has low productivity. Cage model is ranch in 3744 m². Feeding is divided into two groups: basic feed (forage) and supplementary feed (bran, pellets, salt and mineral). Physical health condition is not good as skinny and there are injuries. The trainer there were 3 people. The advantage is recreation, education, research and conservation land for the rare animal.
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