Judul: Salinity influence to mercury toxicity and the effect to milkfish (Chanos chanos Forsskal) physiologic conditions
Abstrak: Mercury is a very dangerous heavy metal that can damage nerve and enzyme system in fish body. This research aimed to knows mercury toxicity to milkfish with different salinity. It consisted of two steps; they were preliminary research (range value test and acute toxicity test) and main research (the salinity influence of mercury toxicity and milkfish’s physiologic condition). Range value test was done in fresh water consisting of five treatments (0, 0.006, 0.06, 0.6 and 6 mg Hg/l). Acute toxicity test also consisted of five treatments (0, 0.110, 0.195, 0.347 and 0.618 mg Hg/l). Moreover, main research consisted of one control and three treatments with three replications at the same concentrate of mercury 0.012 mg Hg/l. Those treatments were salinity 0 ppt, 10 ppt and 20 ppt. The result demonstrated that LC50 96 hour in fresh water was 0.147 mg Hg/l. The main research showed that mercury can increased osmotic gradient, decreased oxygen consumption rate, increased blood glucose rate, decreased hematologic conditions, growth rate, feeding efficiency, and survival rate. Mercury is collected in body gland, for example in gill and liver. Treatment C (10 ppt) showed better physiologic conditions than other treatments. The effect of mercury toxicity would get minimal while maintained at optimal salinity.
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Judul: Acute toxicity, bioconcentration and bioelimination malathion in juvenile milkfish (Chanos chanos forsskal)
Abstrak: Malathion is non systemic organophosphate insecticide that has large spectrum and special character by inhibiting cholinesterase work to asetilcholine in fish body. Generally, the use of malathion is to exterminate insects in health, agriculture, husbandry, and household. This research aims to determine limit level and acute malathion toxicity and to analyze malathion bioconcentrate influence and bioelimination in juvenile milkfish body. Moreover, main research consisted of one control and three treatments with three replications (A. control, B. 025, C. 0.5, D. 0.75 μg/l). The results showed that malathion insektida threshold in the range of 0002-0004 mg / l and acute toxicity LC50 96 hour is 0.0025 mg /, malathion concentration 0,75 (treatment D) was very toxic and influenced physiological condition of juvenile milkfish, therefore increasing accumulation in fish body gland, decreasing hematological condition, feed consumption, specific growth rate, feeding efficiency, and survival rate. Malathion elimination rate of 0.03 mg / l was very fast suitable with time addition and not persistent in juvenile milkfish body.
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Judul: Proses Perancangan Lanskap Kawasan Rasuna Epicentrum, Kuningan Jakarta di PT Bakrie Swasakti Utama
Abstrak: Setiap waktu dari tahun ke tahun terlihat adanya berubah fisik pada kota Jakarta. Hal ini disebabkan karena adanya peningkatan jumlah penduduk di Jakarta sehingga menjadikan daya tarik bagi perusahaan-perusahaan pengembang yang bergerak dibidang pengembangan kawasan pada suatu perkotaan untuk menghadirkan suatu kawasan baru dengan sarana dan prasarana yang berada di sekitarnya seperti pusat perbelanjaan, gedung perkantoran, rumah susun (apartemen), fasilitas pendidikan dan lain-lain. Salah satu perusahaan pengembang yang berfokuskan kepada suatu kawasan perkotaan adalah PT Bakrie Swasakti Utama. PT Bakrie Swasakti Utama merupakan anak perusahaan Bakrieland Development Tbk, perusahaan ini telah menyelesaikan proyek Wisma Bakrie 1 dan 2, Graha Capital, dan saat ini sedang melaksanakan proyek pengembangan kawasan perkotaan di bidang properti yaitu berada di Jakarta Selatan tepatnya di daerah Kuningan dengan proyek pembuatan suatu kawasan bisnis yang bernama Kawasan Rasuna Epicentrum. Rasuna Epicentrum adalah kawasan superblok terbesar di Jakarta Selatan dengan luasan mencapai 53,5 Ha dan akan berkembang menjadi 70 Ha, Kawasan ini merupakan suatu proyek dari Bakrieland yang terletak di wilayah Kuningan, Jakarta. Kawasan Rasuna Epicentrum dirancang dengan konsep mixed-use area yang bergaya arsitektur modern yang selaras dengan lanskap di sekitarnya. Penataan lanskap yang juga mengarah kepada taraf internasional dengan menghadirkan satu ciri khas yang dapat menjadi sebuah keunggulan tersendiri bagi kawasan. Hal ini yang melatarbelakangi mahasiswa untuk magang di PT Bakrie Swasakti Utama.
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