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: Perbaikan Pertumbuhan Tanaman Sengon (Paraserianthes falcataria (L.) Neilsen) dengan Teknik Lateral Root Manipulation (LRM) di Bojong Jengkol, Kabupaten Bogor
Abstrak: Sengon is a fast growing tree species that has good adaptation. But when the land have been compacted and densited, sengon shows dwarfed growth. A lateral root manipulation (LRM) is one of cultivating plants that can fix the growth of plants. The study is aimed to know the effect of LRM technique on the sengon improvment growth. The methodology applied the factorial randomized design method which have three factors. The first factor is to cut the lateral root, the second is to apply stimulantion on root and microbe, and the third is to fertilize periodic. The results show that combination cutting root and fertilize periodic without applying stimulantion on root and microbe increase height improved 10,45 cm per week and number of bud 10 peices per week. All treatments did not effect on the stem diameter. The variables of the treatment visualy dont changes significally color of leaf and new root growing. However, the treatment of cutting root can stimulate to grow a new root.
Keyword: Bogor Agricultural University (IPB), root and microbe stimulant, Paraserianthes falcataria, lateral root manipulation, fertilize

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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