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: 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: Desain Lanskap Jalan Slamet Riyadi Kota Surakarta Berbasis Budaya Jawa.
Abstrak: Kota Surakarta dianggap sebagai salah satu pusat kebudayaan Jawa. Keberadaan benda cagar budaya serta warisan kesenian dan kebudayaan menjadi potensi Kota Surakarta untuk membangun karakteristik sebagai kota budaya. Penataan ruang bernuansakan budaya di Kota Surakarta dirasa perlu, terutama ditengah pesatnya modernisasi pembangunan yang terjadi saat ini. Jalan Slamet Riyadi merupakan salah satu area yang berpotensi untuk dikembangkan dengan nuansa budaya Jawa. Penelitian ini bertujuan untuk mengidentifikasi warisan budaya yang ada di jalan Slamet Riyadi, mengidentifikasi dan menganalisis potensi yang ada pada lanskap jalan Slamet Riyadi, dan mendesain lanskap jalan Slamet Riyadi dengan berbasis budaya Jawa. Penelitian ini mengacu pada proses perancangan Gold 1980 dengan modifikasi. Konsep desain yang digunakan pada penelitian ini adalah konsep tata ruang rumah bangsawan Jawa pada jaman dahulu atau delem yang terdiri dari pelataran, pendhapa, pringgitan, dan dalem ageng. Kemudian bagian-bagian tersebut diterapkan sebagai sub-tema desain setiap segmen pada tapak dan menjadi gambaran dari zona-zona penyusun tapak. Desain dilakukan pada area Citywalk, jalur sepeda, badan jalan dan beberapa ruang di sekitar tapak. Desain ini juga mengambil beberapa bentuk ragam hias bangunan Keraton Kasunanan dan Mangkunegaran serta motif batik khas Keraton Kasunanan dan Mangkunegaran. Hasil penelitian ini berupa siteplan, detail view, gambar potongan, gambar ilustrasi dan detail desain.
Keyword: Citywalk, Dalem, Desain Berbasis Budaya Jawa, Desain Lanskap Jalan, Kota Budaya