Judul: Composition of Undergrowth Types at Sengon (Paraserianthes falcataria L. Nielsen) Stands
Abstrak: Penelitian ini bertujuan untuk mengetahui komposisi dan keanekaragaman jenis tumbuhan bawah pada tegakan sengon. Hasil inventarisasi pada tegakan sengon umur 5 tahun ditemukan 41 jenis dari 23 famili yang didominasi jenis Ottochloa nodosa, Paspalum conjugatum, Lepistemon binectarifer, dan Asytasia gangetica. Pada umur 15 tahun dijumpai 34 jenis dari 20 famili yang didominasi jenis O. nodosa, Oplismenus compositus, Axonophus compressus, dan A. gangetica. Tingkat keanekaragaman jenis menurut klasifikasi Magurran (1998) pada tegakan sengon umur 5 tahun sebesar 2,11 (sedang), sedangkan pada tegakan sengon umur 15 tahun sebesar 1,86 (rendah). Sementara itu, pada perhitungan tingkat kesamaan komunitas, kondisi komunitas berdasarkan jumlah jenis dan kelimpahan individu setiap jenisnya tergolong berbeda (IS ≤ 75%), yaitu sebesar 48,42. Dari jenis-jenis yang ditemukan terdapat beberapa jenis yang berpotensi sebagai tumbuhan obat, seperti pacing (Costus speciosus), dan rumput teki (Cyperus rotundus), Sebagai bahan pangan, seperti talas (Colocasia esculenta) dan takokak (Solanum jamaicense). Jenis-jenis penutup tanah dan pakan ternak seperti kacang hias (Arachis pintoi), dan sentro (Centrocema pubescens). Jenis tanaman hias seperti wedelia (Wedelia trilobata), dan keladi (Caladium bicolor). Serta terdapat pula jenis yang berpotensi sebagai sumber bahan bakar yaitu iles-iles (Amorphopallus variabilis).
Keyword: Species composition,, Species diversity, Undergrowth species

Judul: Komposisi Jenis Tumbuhan Bawah pada Tegakan Sengon (Paraserianthes falcataria, L. Nielsen) (Studi Kasus di Areal Kampus IPB Darmaga, Bogor)
Abstrak: Sengon (Paraserianthes falcataria L. Nielsen) is a tree species which has high economy value and potential for agroforestry development. Information on the diversity of undergrowth species at sengon stands has not been much known. Undergrowth vegetation have ecological functions to keep the ecosystem balance and as addition, it can also take a role as a weed in the monoculture plants cultivation. In other hand, some undergrowth species have been identified as beneficial plants. This research aims to know the composition and diversity of undergrowth species at sengon stands. Results of inventory at the age of 5 years sengon stands, found 41 species from 23 families which dominated by the type of Ottochloa nodosa, Paspalum conjugatum, Lepistemon binectarifer, and Asytasia gangetica. At the age of 15 years, found 34 species from 20 families which dominated by the type of Ottochloa nodosa, Oplismenus compositus, Axonophus compressus, and Asytasia gangetica. The diversity levels of species according to the classification of Magurran (1998) at age 5 years sengon stands of 2.11 (medium), while at the age of 15 years sengon stands of 1.86 (low). Meanwhile, in the calculation of community similarity levels, condition of the community based on the number of types and abundance of individuals of each species is different (IS ≤ 75%), with the value 48.42. Among the species found, there are several types of plants which have potency as medicinal plants, such as pacing (Costus speciosus) and nut-grass (Cyperus rotundus), as food resource, such as taro (Colocasia esculenta) and takokak (Solanum jamaicense). The types of cover crops and fodder such as ornamental peanut (Arachis pintoi) and sentro (Centrocema pubescens). The type of ornamental plants such as wedelia (Wedelia trilobata) and taro (caladium bicolor). Furthermore, there is the type of plants which has potency as a fuel source such as iles-iles (Amorphopallus variabilis).
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Judul: Antibodi anti-idiotipe sebagai kandidat vaksin rabies, Anti-idiotype andibody as a rabies vaccine candidate
Abstrak: Anti rabies serum (ARS) called antibody 1 (Ab1) was used as the antigen to immunize laying chickens. Anti-Ab1 chicken immunoglobulins (IgY), the antiidiotype antibodies against rabies (Ab2) was isolated from chicken blood every week for ten weeks. The highest titer of Ab2 was found at the third week after the last immunization. Immunoglobulin Y was separated by means of ammonium sulfate precipitation, then dialyzed using PBS pH 8.0 for 24 hours at 2 – 8 oC and purified using affinity chromatography column for IgY lead the proteins molecules with 185,000; 95,000 and 49,000 dalton in weigth. Purified IgY was used to immunize New Zealand White rabbit and the antibody response (Ab3) was detected using Agar Gel Precipitation Test (AGPT). The Ab3 showed specific reaction with Ab2 as well as rabies virus. Interestingly, Ab2 and rabies virus express partial identity reaction. This lead the insight, that not all parts of Ab2 are internal image of rabies virus. The efficacy of Ab3 was detected using enzyme linked immunosorbent assay (ELISA) and indicated that the level of Ab3 titer is protective according to WHO standard (more than 0.5 IU/ml). The conclusion of this study is the anti-idiotype antibody can induce protective immune response against rabies virus and can be used as an alternative for rabies anti-idiotype vaccine. Key words : anti-idiotype vaccine, antibody, rabies
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