Judul: Filtrasi Air Sungai Menggunakan Membran Nilon dengan Metode Dead-End
Abstrak: On this research nylon membrane be used as filtration media of river water. Filtration did use with deadend method it is a methode position of membran is perpendicular with feed. River water characterized physicly before and after filtration. There are characterizations observed viscosity, turbidity, and density. There are three variant mass of nylon 5, 6 and 6.5 grams. The methode of sintesize membrane is phase inversion. Rejection of 6.5 grams is the biggest it is 69.98% for turbidity rejection, 98.67% for viscosity rejection and 21.06% for density rejection. Membrane was test its strength and morphology used Economic Force Sensor and Scanning Electron Microscopy (SEM) before and after filtration in variant mass. The strength of membrane before filtration is more low than membrane after filtration and the more weight nylon mass the more its strength. The size of pore membrane is 5 micrometre and it’s categorized as microfiltration. There is a fouling in morphology of membrane after filtration and the more weight nylon mass the more tiny its pore
Keyword: Bogor Agricultural University (IPB), river water, nylon, membrane, filtration

Judul: Kajian Membran Nilon pada Proses Filtrasi Bertahap Sistem Cross-Flow untuk Desalinasi Air Payau
Abstrak: The membrane is semi-permeable coating that can form a thin layer separating the two phases with different characters. The membrane used was a nylon membrane. Membrane is used as a filter for the filtration process gradual cross-flow system. Cross-flow technique used to filter the water by passing the water on the membrane with 90° angular position to the normal line of membrane with the variation of the mass 6, 6.5 and 7 g. The filtration was done at pressure of 2.5, 5, 6, 7 and 8 psi. Each membrane was tested for compressive strength and tensile strength before and after each used. SEM test used to see the surface morphology of membrane before and after each used. In brackish water was done flux test and rejection test such as turbidity, salinity, density, and ph. Tests were performed on each filtration flux where the highest flux value is at 6 g membrane. The best rejection and mechanical test at 6.5 g membrane.
Keyword: Bogor Agricultural University (IPB), flux, cross-flow, filtration, nylon, membrane

Judul: Taksonomi dan variasi morfologi secara geografi pada trachypitkecus auratus (E. Geoffroy, 1812) dan trachypithecus cristatus (Raffles, 1821 (Primates=Cercopithecidae=Colobinae)
Abstrak: Penelitian yang bertujuan untuk mengungkapkan status taksonomi Trachypithecus auratus dan Trachypithecus cristatus dilakukan atas dasar spesimen yang disimpan di dalam koleksi Museum Zoologicum Bogoriense Balitbang Zoologi, LIPI (MZB); Pusat Pengkajian Sumberdaya Alam Sumatra. Jurusan Biologi, Fakultas MIPA, Universitas Andalas (PBC SD dan PBC PT) dan Zoological Reference Collection, National University of Singapore (ZRC). Untuk mengetahui status taksonomi kedua jenis tersebut, materi yang digunakan untuk analisis se-banyak 80 buah spesimen dan dilakukan pengukuran berdasarkan pada 28 variabel tengkorak dan dua variabel tubuh. Menggunakan analisis regresi berganda dapat menerangkan bahwa tujuh macam variabel tengkorak dan dua variabel tubuh tidak dipengaruhi oleh jenis kelamin. Variabel tersebut yaitu panjang dan lebar foramen magnum (FML dan FMW), jarak antara molar 3 (M3-M3), lebar mesopterigoid fosa (MFW), lebar terdekat interorbital (PIW), lebar post orbital (POW), panjang tulang hidung (TH), panjang badan dan panjang ekor. Analisis diskriminan dapat menerangkan bahwa pada populasi Trachypithecus auratus di Jawa dijumpai bentuk variasi klinal yang mengakibatkan di Pulau tersebut hanya dijumpai satu anak jenis yaitu T. auratus auratus. Sebaliknya pada populasi T. cristatus dijumpai ada lima macam bentuk yaitu Thailand, P. Natuna, Bintang, Sumatra-Kalimantan dan Malaya yang merupakan bentuk intermediar antara P. Sumatra-Kalimantan dan Bintang…dst
Keyword: Trachypithecus cristatus, Morphology, Cercopithecidae, Colobinas