Judul: Diversity and distribution patterns of invasive alien plant species in bojonglarang jayanti nature reserve cianjur
Abstrak: Cagar Alam Bojonglarang Jayanti adalah salah satu kawasan konservasi yang diduga diinvasi oleh spesies tumbuhan asing. Tujuan dari penelitian ini adalah menghitung keanekaragaman dan mengidentifikasi pola sebaran spesies tumbuhan asing invasif. Pengumpulan data menggunakan analisis vegetasi metode kombinasi jalur dan garis berpetak pada vegetasi hutan, dan metode petak ganda pada vegetasi padang rumput. Hasil analisis vegetasi di hutan dataran rendah primer teridentifikasi 2 spesies tumbuhan asing invasif yang termasuk ke dalam 2 famili, di vegetasi hutan pantai teridentifikasi 11 spesies tumbuhan asing invasif yang termasuk ke dalam 8 famili, di vegetasi hutan dataran rendah sekunder teridentifikasi 13 spesies tumbuhan asing invasif yang termasuk ke dalam 9 famili, dan di vegetasi padang rumput teridentifikasi 10 spesies tumbuhan asing invasif yang termasuk ke dalam 8 famili. Secara umum pola sebaran tumbuhan asing invasif berdasarkan indeks Morisita adalah mengelompok (clumped)., Bojonglarang Jayanti Nature Reserve is one of the conservation area that is supposed getting inveded by alien plant species. The purpose of this research is to counting diversity and identify distribution patterns of invasive alien plant species. Data was collected by vegetation analysis with squared track and line combination method in forest vegetation, and quadrat method in savanna vegetation. The result of vegetation analysis in primary lowlands forest vegetation was identified 2 invasive alien plant species that belong to 2 families, in coastal forest was identified 11 invasive alien plant species that belong to 8 families, in secondary lowlands forest was identified 13 invasive alien plant species that belong to 9 families, and in savanna vegetation was identified 10 invasive alien plant species that belong to 8 families. Generally, the distribution patterns of invasive alien plant species based on Morisita index was clumped.
Keyword: Bojonglarang Jayanti, keanekaragaman, pola sebaran, spesies tumbuhan asing invasif

Judul: Keanekaragaman dan Pola Sebaran Spesies Tumbuhan Asing Invasif di Cagar Alam Cibanteng
Abstrak: Cagar Alam Cibanteng merupakan salah satu kawasan konservasi yang diinvasi oleh spesies tumbuhan asing. Tujuan dari penelitian ini adalah mengidentifikasi keanekaragaman dan pola sebaran spesies tumbuhan asing invasif. Metode yang digunakan ialah kombinasi jalur dan garis berpetak pada vegetasi hutan, dan metode petak ganda pada vegetasi semak. Hasil analisis vegetasi di CA Cibanteng teridentifikasi sebanyak 32 spesies tumbuhan asing invasif dari 15 famili. sedangkan untuk masing-masing tipe ekosistem teridentifikasi di hutan dataran rendah primer sebanyak 24 spesies tumbuhan asing invasif dari 12 famili, di vegetasi hutan dataran rendah sekunder teridentifikasi sebanyak 31 spesies dari 15 famili dan di vegetasi hutan pantai teridentifikasi sebanyak 10 spesies dari 6 famili. Untuk vegetasi semak tengah teridentifikasi sebanyak 9 spesies dari 4 famili, dan di vegetasi semak tepi teridentifikasi sebanyak 16 spesies dari 8 famili, Secara umum pola sebaran tumbuhan asing invasif berdasarkan indeks Morisita adalah mengelompok (clumped).
Keyword: cibanteng, keanekaragaman, pola sebaran, spesies tumbuhan asing invasif

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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