Judul: Perubahan Penggunaan/Tutupan Lahan Tahun 1990-2005 dan Proyeksi Perubahan Tahun 2020-2035 di Kawasan Jabodetabek
Abstrak: Rapid population and economic activities growths in Jabodetabek cause more demand for urbanization. People tend to convert their land to land uses that provide higher land rent. This research aims to describe land use/cover change in the Jabodetabek region from 1990 to 2005, to analyze the spatial pattern of land use/cover changes in the Jabodetabek region from 1990 to 2005, and to forecast the land use/cover for 2020 and 2035. The results of this study show that the land use/cover in 1990, 1995, and 2005 was dominated by paddy field, which were respectively 256.757 Ha (37.7%), 258.638 ha (37.9%), and 254.670 ha (37.4%). In that period, the paddy field was also experiencing the largest land use/cover conversion into other uses. Meanwhile, the built-up area experiencing the largest increase, reached 92.604 ha in 2005. Jabodetabek area in 2020 is expected to be dominated by paddy fields as well as as built-up, whereas in the year 2035, built-up area to be the largest land use/cover areas in Jabodetabek region. Forest area, water bodies, paddy field as well as other agricultural uses will continue to decrease since 2005. On the other side, in the built up 2020 and 2035 the built up areas will continue to increase. The largest type of land use/cover change in Jabodetabek region is the conversion of paddy field in built-up area.
Keyword: Land use forecast, Land use/cover change, Jabodetabek region

Judul: Kajian Keterkaitan Perubahan Penggunaan Lahan Dengan Pertumbuhan Ekonomi Di Wilayah Jabotabek Tahun 1990-2000
Abstrak: Jabotabek region is considered to be the center of national activities which characterized by its high rate of spatial interaction within the region and very high population density. The high population and economic growth cause significant increase on land demand. It will cause agricultural land use conversion to industrial and housing uses.
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Judul: Natural Pearlescent Pigment Dari Kristal Guanin Sisik Ikan Bandeng (Chanos Chanos)
Abstrak: Pearlescent pigment yang dikenal dengan nama pearl essence atau fish silver merupakan pigmen berwarna keperakan yang memiliki kenampakan seperti mutiara. Natural pearlescent pigment diperoleh dari sisik ikan dengan kandungan guanin 75-97%, dan kini mulai banyak digunakan pada industri personal care dan produk kosmetika. Penelitian ini bertujuan untuk menentukan teknologi ekstraksi natural pearlescent pigment dan karakteristik kualitatif kristal guanin pada sisik ikan bandeng (Chanos chanos). Perlakuan dalam penelitian ini meliputi ekstraksi menggunakan air deionisasi dengan sisik yang dibekukan terlebih dahulu, air deionisasi 10 οC, dimetil sulfoksida 15%, dan 25% (v/v). Hasil spektrum absorbansi UV-Vis menunjukkan kristal guanin merupakan pigmen berwarna putih berdasarkan serapan pada panjang gelombang 200-800 nm. Hasil terbaik diperoleh pada ekstraksi menggunakan air deionisasi dengan sisik beku nilai kristalinitas 68,4%, serapan gugus amina pada 3410 cm-1 dan gugus amida pada1681 cm-1, puncak intensitas 2θ pada sudut 27,7° yang menunjukan identitas dari kristal guanin anhidrat. Tingkat kandungan guanin sebesar 0,0455 ± 0,0033 g (0,46%).
Keyword: Dimetil sulfoksida, guanin, kosmetik, kristalinitas, pearlescent pigment