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: Mercury Toxicity and It’s Effect on Histopathology Change of Nile Tilapia (Oreochromis niloticus).
Abstrak: Nile tilapia (Oreochromis niloticus) is one of fish species that oportunity to contaminated with mercury. The effects of pollutants can damage living organisms organs and can cause death. The effects caused mercury had acute or chronic character. The aims of this study are to determine threshold and acute toxicity of mercury chloride (HgCl2) of Nile tilapia (Oreochromis niloticus), to assess the effect of mercury chloride (HgCl2) on several biometric parameters (survival, growth rate of average daily weighted, liver condition, bile and reproductive variability of Nile tilapia (Oreochromis niloticus), assess the level of damage to the histological structure of the gills, liver and kidney of Nile tilapia (Oreochromis niloticus) caused mercury chloride (HgCl2) exposure. This study was conducted from February to June 2013. Nile Tilapia (Oreochromis niloticus) were used in this study were female with average weight 20 grams or 11-13 cm length range. Toxicant materials used in this study was mercury chloride (HgCl2). Fish were reared in each aquarium 60x40x30 containing 48 liters of water. This study consists of three stages: a preliminary test, acute test, and sub-chronic test. To determine the changes in biometric condition of tilapia approximated by measuring the survival rate (SR), the growth rate of average daily weight , the content of mercury in the fish organs, hepatosomatic index (HSI), the relative bile volume (VER), gonadal soamtic index (IKG), fecundity and oocit diameter, tissue damage caused by mercury in fish organs by making histological preparations stained with hematoxylin and eosin. The median lethal concentration (96 hr, LC50) of Mercury Chloride was calculated as 1,64 mgL--1.The survival rate was highest in the control treatment (46,67 %) . Mercury chloride with concentration 0.196 mgL--1 show significant effect to changes HSI and relative bile volume, and oocyte diameter of Nile tilapia (p < 0,05). Mercury chloride with a concentration of 0,164 mgL-1 and 0,196 mgL-1 have not a significant effect on the growth rate of weight, gonadal somatic index and fecundity of Nile tilapia (p > 0,05). Mercury chloride cause damage to gills (hyperplasia, hypertrophy, proliferation and neukrosis), liver (hyperplasia, hemorhage, shrinkage of hepatocytes, proliferation and neukrosis) and kidney (hyperplasia, hemorrhage, shrinkage of the glomerulus, proliferation and neukrosis).
Keyword: Nile tilapia, Hepatosomatic indexs (HSI), histopathology

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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