Judul: Kemampuan Jalur Hijau Jalan di Kota Bogor dalam Meredam Kebisingan Lalu Lintas.
Abstrak: Traffic activity can cause some noise, which at certain levels can interfere with human health. One attempt to reduce noise by building green belt road. in urban areas. The purpose of this study was to determine the ability of the roadside vegetation in reducing noise. This observation was carried out around the roadside vegetation on Jl. Padjadjaran, Jl. A. Yani, Jl. Juanda and the Bogor Botanical Garden, conducted July 2014 until August 2014. The data which been collected was the noise level around the green belt road, the composition and structure of vegetation and leaf area index. Roadside vegetation in Jl. A. Yani with 2.9788 leaf area index of 2.9788 has a high reduce noise that is equal to 7.31 dB, while the lowest reduction occurred ability on the roadside vegetation Jl. Padjadjaran (Telkom) with leaf area index of 1.322 that is equal to 3.03 dB.
Keyword: leaf area index, noise reduce, roadside vegetation

Judul: Peranan Vegetasi Dalam Mereduksi Kebisingan Jalan Raya
Abstrak: Penelitian ini bertujuan untuk mengetahui kemampuan vegetasi dalam mereduksi kebisingan dilihat dari jenis dan jarak tanamnya yang ada di tepi jalan tol Jagorawi (Km.ll,18 dan 35) dan Kebun Raya Bogor (n.Raya Pajajaran Km. 43). Pengukuran dilakukan siang hari pada jam 08.00-09.00WIB, 12.00- 13.00 WIB danI6.00-17.00 WIB. Pengukuran kebisingan menggunakan metode Continuous dengan alat Sound Level Meter. Penelitian ini dilakukan pada musim kemarau di bulan Mei-Agnstus 2000. Interaksi antara vegetasi dengan kebisingan diuji dengan Analisa Faktorial Empat Faktor dan Uji Beda Nyata Terkecil. Hasil penelitian menunjukkan bahwva kemarnpuan vegetasi dalarn mereduksi kebisingan bergantun
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Judul: Synthesis of Apatite - Chitosan Composite Using Duck Eggshell and Chitosan with Temperature and pH Control
Abstrak: Composite of apatite-chitosan was prepared by using chitosan as polymer matrix. Calcium phosphate was prepared from CaO and (NH4)2HPO4, which the ratio Ca : P had to be 1.67. Chitosan is produced by deacetilase from biopolymer chitin. Duck eggshell (95% CaCO3) as starting material was converted to be calcium oxide (CaO) through calcinations with temperature 1000oC for 5 hours. In-situ and ex-situ methods were prepared from apatite and chitosan (dissolved with acetate acid 2%). Calcium phosphate prepared for bone implantation, but it is too fragile and brittle to be implant into the body. So addition of chitosan can decrease crystalinity and increase mechanic characteristic (tougher). Composite apatite-chitosan was resulted by fast precipitation. Fast precipitation was held in a breaker glass with nitrogen atmosphere, under controlled temperature at 37oC and pH 7, in order to increase amount of hydroxyapatite. Precipitation with CaO which was dropped by (NH4)2HPO4. Hydroxyapatite and chitosan were appearing at samples with in-situ and ex-situ methods which indicating by peak matching of XRD (closed lattice parameter, crystal size), overlapping at FTIR spectra and supporting by SEM picture (homogenous and agglomerated particle). However, it still needs further research to examine biocompatibility osteoconductive degree of sample by in-vivo and in-vitro test.
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