Judul: Hubungan indeks vegetasi dengan kualitas perairan Teluk Jakarta dengan menggunakan citra landsat multi temporal
Abstrak: Kualitas air merupakan sifat air dan kandungan makhluk hidup, zat, energi, atau komponen lain dalam air. Pertambahan jumlah penduduk yang tiap tahun meningkat tanpa diikuti dengan penggunaan lahan yang baik menyebabkan penurunan vegetasi yang berdampak penurunan kualitas perairan Teluk Jakarta. Jika pencemaran di Teluk Jakarta tidak segera ditangani, maka akan menimbulkan berbagai kerugian ekologis, ekonomis, dan kesehatan yang sangat membahayakan. Untuk itu diperlukan suatu penelitian tentang perubahan lingkungan yang cepat dan murah dengan bantuan remote sensing, agar dapat dilakukan monitoring jangka panjang. Penelitian ini dilaksanakan di Teluk Jakarta dengan mengambil data kualitas air dengan parameter fisik berupa kecerahan pada saat satelit lewat. Alat dan bahan yang digunakan antara lain peta lokasi, secchi disk, kamera foto, Global Positioning System (GPS), dan tal& sheet. Bahan yang digunakan sebagai objek penelitian ini adalah perairan Teluk Jakarta dan vegetasi sekitar Teluk Jakarta. Pengolahan data dilakukan dengan bantuan software Idrisi Kilimanjaro dan software ERDAS untuk mendapatkan nilai-nilai spektrd pada Citra Landsat. Sedangkan untuk mendapatkan model kualitas perairan menggunakan analisis regresi dengan bantuan software Microsoft Excel. Nilai Indeks vegetasi (NDVI) yang meliputi bagian hutan dianalisis meldui persamaan rasio [(NIR-R) / (NIR+R)] X 100.
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Judul: Analisis Spasial dan Temporal Kualitas Perairan (Muatan Padatan Tersuspensi dan Klorofil-a) di Teluk Jakarta pada Tahun 2002-2012 menggunakan Citra Satelit LANDSAT-7 ETM.
Abstrak: Total suspended solid and chlorophyll-a are water quality parameter which can be studied using remote sensing method. The purpose of this study was to analyzing spatially and temporally water quality (total suspended solid and chlorophyll-a) in Jakarta Bay during 2002-2012 using LANDSAT-7 ETM satelite imageries. In situ measurement of total suspended solid and chlorophyll-a sample is taken from 20 station in July 2012. Analysis of spatial and temporal distribution of the water quality parameters is then done using the satellite imageries. Algorithms used in the analysis are the Tassan for total suspended solid concentration and the Pentury algorithm for chlorophyll-a concentration. The result of this study shows that the concentrations of the total suspended solid and chlorophyll-a tend to be higher in southern and eastern parts of the bay rather then other parts of the bay during the period of 2002-2012.
Keyword: Jakarta Bay, Total suspended solid, Chlorophyll-a, Tassan, Pentury, LANDSAT-7 ETM

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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