Judul: Dampak Tarif Impor terhadap Produksi dan Impor Kedelai di Indonesia
Abstrak: Indonesia is a soybean importing country. Approximately 70% of Indonesian soybean consumption is fulfilled from import of soybean. There are many policies that have been promoted by Indonesian government to reduce the volume of imported soybean. One of the policies is import tariff protection. The purpose of import tariff is to protect farmers from a huge amount of imported soybean in domestic market, so the domestic soybean can compete with imported soybean. This research aimed to identify Indonesian government policies on soybean, to analyze the variable that affect the volume of imported soybean, and to analyze the tariff impact on the import volume and domestic soybean production. The analyses were conducted using descriptive analysis and simultaneous equations model. The identification of the policies to reduce the volume of imported soybean resulted the following three policies: agriculture intensification, agriculture extensification, and import tariff policies. Furthermore, the volume of imported soybean was affected by the following three variables: soybean consumption, import tariff and import volume of the preceding year. The simulation result showed that determining of 10% import tariff decrease 11.99% of import volume and increase 0.05% of domestic soybean production. However, 15% of import tariff decrease the import volume by 33.54% and increase the soybean production by 0.12%.
Keyword: simultaneous equation model, tariff, import, soybean

Judul: Pengaruh Tarif Impor terhadap Volume Impor Kedelai di Indonesia
Abstrak: Indonesia merupakan salah satu negara importir kedelai terbesar di dunia. Rata-rata kebutuhan kedelai di Indonesia tiap tahunnya dipenuhi sebesar 60% dari impor. Pemerintah Indonesia telah melakukan berbagai kebijakan untuk mengurangi volume impor kedelai, salah satunya dengan kebijakan tarif impor. Tujuan penelitian ini adalah menganalisis dampak kebijakan tarif impor terhadap volume impor kedelai di Indonesia. Penelitian ini menggunakan analisis deskriptif dan model koreksi kesalahan untuk mendapatkan tujuan yang diinginkan. Hasil analisis regresi menunjukkan bahwa pada jangka panjang variabel harga kedelai internasional dan nilai tukar Rupiah terhadap Dollar Amerika berpengaruh nyata terhadap volume impor sedangkan pada jangka pendek variabel yang berpengaruh nyata adalah tarif impor dengan pengaruh negatif. Tidak signifikannya tarif impor pada jangka panjang dikarenakan penerapan tarif impor kedelai di Indonesia selama periode tahun 2000-2017 tidak diberlakukan secara berkelanjutan. Maka pemerintah perlu memberlakukan tarif impor yang optimal dan tidak melewati batas tarif WTO sebesar 27 persen terhadap kedelai impor secara berkelanjutan.
Keyword: kedelai, model koreksi kesalahan, tarif impor

Judul: Synthesis of Biphasic Calcium Phosphate Made of Eggshells Through A Hydrothermal Method
Abstrak: Biphasic Calcium Phosphate mixed of hydroxyapatite and tricalcium phosphate. A hydrothermal method of synthesizing by mixing CaO as calcium source and (NH4)2HPO4 as phosphate source with distilled water. CaO got from calcination process made of eggshells. All samples were synthesized using hydrothermal reactor then followed by sintering process. The molar ratio of Ca and P for all samples was 0.5 M : 0.3 M. Hydrothermal temperature and sintering temperature were variated they are 250 ºC, 300 ºC for hydrothermal and 800 ºC, 900 ºC, 1000 ºC for sintering, higher treatment temperature, tricalcium phosphate appears. Final results of synthesis were characterized by using X-ray Diffraction and Fourier Transform Infrared. X-ray Diffraction patterns was ecompared with database Join Committee on Powder Diffraction Standards and found tricalcium phosphate and hydoxyapatite.
Keyword: biphasic calcium phosphate, hydrothermal, hydroxyapatite, tricalcium phosphate