Judul: Application of Cellulose Acetate Membrane Porogenized by Nonylphenol Ethoxylate in Filtering Detergent Effluent.
Abstrak: Limbah detergen di lingkungan telah menjadi perhatian karena jumlahnya yang semakin banyak tetapi belum ditangani dengan baik. Limbah detergen ini dapat menurunkan muttu air. Alternatif pengolahan yang dapat digunakan adalah membran yang dapat diaplikasikan untuk menyaring limbah detergen tersebut. Membran dalam penelitian ini dibuat dari bahan organik, yaitu dari polimer-selulosa asetat dan surfaktan nonionik (nonilfenol etoksilat/NPE) dengan komposisi 0; 1; 3; 5% (b/v). Membran ini diuji nilai fluks air dan indeks rejeksi. Nilai fluks air dan indeks rejeksi digunakan sebagai ukuran permeabilitas dan selektivitas membran. Hasilnya menunjukkan bahwa pertambahan NPE meningkatkan nilai rerata fluks air. Pengujian indeks rejeksi dinilai pada larutan detergen dengan konsentrasi 1600 ppm. Nilai indeks rejeksi yang dihasilkan sebesar 40% (NPE 1%), 64% (NPE 3%), dan 92% (NPE 5%) yang membuktikan membran ini dapat digunakan dalam pemisahan detergen. Membran terbaik yang dapat digunakan dalam pemisahan larutan detergen ialah pada konsentrasi NPE 5% yang memiliki nilai indeks rejeksi di atas 90%.
Keyword: 

Judul: Pengembangan Membran Selulosa Asetat Menggunakan Natrium Dodesil Sulfat
Abstrak: Development of membrane technology is waste treatment unit is growing rapidly and widely used in separation process. Membrane technology is chosen because the process is simple, low energy use, nondestructive, and do not generate new waste, thus classified as a green good technology. The production of membrane was started by preparing polymeric mixture solution of cellulose acetate (CA) and sodium dodecyl sulfate (SDS) in acetone. Composition of CA was 15% w/v and composition of SDS were varied from 0; 0.05; 0.01; to 0.125% w/v. The solution was stirred by ultrasonic for 3 hours and casted on the glass plate surface then immersed in warm water at 60 oC. The membranes were characterized by their rejection index. Rejection index was applied to detergent solution with concentration of 1600 ppm. When compared with values below the critical micelle concentration (CMC), the best average value of rejection index was resulted at the initiation of CMC, with SDS concentration of 0.125%. At that concentration, a quite high average values was obtained for the rejection index (77%). While, at the SDS concentration below CMC, 0.05% and 0.01%, the average index rejection values were 17% and 37%, repectively. The best CMC value was reached at the initiation (0.125%).
Keyword: 

Judul: Karakteristik anatomi skelet kaki belakang Badak Jawa (Rhinoceros sondaicus)
Abstrak: Javan rhinoceros (Rhinoceros sondaicus) is one of the rarest mammals which can be found only in Ujung Kulon National Park (UKNP), Banten Province, Indonesia. Behavioural study on this animal could be learned by studying their anatomy structure. The aim of this study was to learn about the characteristics of the javan rhino’s hind limb skeletal anatomy and was compared with the sumatran rhino’s hind limb skeleton. This study used a set of javan rhino’s hind limb skeleton which was brought from UKNP. The observation was done by measuring the skeleton, inspecting the structures and relating it to its behaviour, then capturing pictures of the skeleton. The elements of javan rhino’s skeleton were named based on Nomina Anatomica Veterinaria 2012. Generally, a javan rhino’s hind limb skeleton’s structure was relatively similar to a sumatran rhino. But, there are several differences in the structure that is assumed to be related to the difference in body size between those two species. The differences found were the wideness of ala ossis ilii. Furthermore, the trochanter major and trochanter tertius were more developed. An indentation (deep sulcus) was also found on dorsal side of os talus.
Keyword: Bogor Agricultural University (IPB), anatomy skeleton., javan rhino, hind limb