Judul: Dimensi dan Sistem Perakaran Sengon (Paraserianthes falcataria (L.) Nielsen) di Desa Cikarawang, Kecamatan Dramaga, Kabupaten Bogor
Abstrak: Sengon (Paraserianthes falcataria (L) Nielsen) is one of tree species which is currently developed on a wide scale in community forests and highly demanded as raw industrial material. However, most of sengon plantation has not been followed by agroforestry system land use, so that the land becomes less productive. This study aims to identify the dimensions of sengon plants, percent canopy closure, and the root system at different spacing. Spacing used in this study are 2 x 2 m, 3 x 3 m, and 3 x 4 m. The results showed that the plant parameters; diameter at breast height, total height, crown length and crown width best found at 3 x 3 m spacing. However, the largest percentage of canopy closure was found at a spacing of 2 x 2 m. Variable of horizontal root length have different results with other root system variables. The length of the longest horizontal roots were found at a spacing of 3 x 4 m, whereas for horizontal root depth, horizontal root fraction, and shoot-root ratio were found at greatest spacing of 3 x 3 m.
Keyword: rooting system, plant dimension, Paraserianthes falcataria (L) Nielsen, Agroforestry

Judul: Pertumbuhan Tanaman Sengon (Paraserianthes falcataria (L.) Nielsen) pada Kebun Campuran di Desa Karacak, Kecamatan Leuwiliang, Kabupaten Bogor
Abstrak: Salah satu tanaman penghasil kayu yang ditanam pada kebun campuran di Desa Karacak ialah sengon. Pemilihan kombinasi dan jarak tanam tanaman yang dibudidayakan pada kebun belum direncanakan sebelumnya, sehingga memungkinkan terjadinya perbedaan respon bagi pertumbuhan tanaman sengon. Penelitian ini bertujuan untuk melakukan pengkajian pertumbuhan tanaman sengon yang berkaitan dengan komposisi, jarak tanam, dan manajemen pengelolaan, dan juga mengkaji persentase penutupan tajuk tanaman pada kebun campuran di Desa Karacak, Kecamatan Leuwiliang, Kabupaten Bogor. Hasil penelitian menunjukkan kebun campuran KC 4a dengan tanaman sengon umur 1-1,5 tahun dan KC 3b dengan tanaman sengon umur 3 tahun, memiliki pertumbuhan tinggi yang cukup baik dan pertumbuhan diameter yang kurang baik. Sedangkan persentase penutupan tajuk pada kebun campuran tanaman sengon umur 1-1,5 tahun relatif kecil dibandingkan dengan tanaman sengon umur 3 tahun. Pengaruh jarak tanam, komposisi, dan kegiatan pengelolaan diduga menjadi faktor rendahnya pertumbuhan dimensi tanaman dan nilai persentase penutupan tajuk. Petani kebun campuran menganggap sengon merupakan tanaman tidak memerlukan pemeliharaan intensif dan kegiatan pengelolaan lahan yang hanya difokuskan pada tanaman buah-buahan dan tanaman semusim, menyebabkan pertumbuhan dimensi tanaman sengon rendah.
Keyword: 

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
Keyword: