Judul: Sintesis Senyawa Kalsium Fosfat Dengan Teknik Presipitasi Single Drop
Abstrak: The high damage of bone trigger a variety of research about bone biomaterial. So far, compliance for this needed done import materials. The material which used for bone biomaterial is calcium phosphate. In this research used synthesis of calcium phosphate. Synthesis of calcium phosphate performed using precipitation method single drop and wise drop at room temperature with sintering themperature 900oC, themperature 70oC with sintering time variation (110oC, 300oC, 600oC, and 900oC). Results obtained from sintering is fluffy white powder. Result from x-ray diffraction characteristic for all sample with themperature sintering 900oC show the phase formed is calcium pyrophosphate and other phase from calcium phosphate that is hydroxyapatite, tricalcium phosphate, octacalcium phosphate, carbonate apatite type-A and carbonated apatite type-B. The longer stirring time so the phase of calcium pyrophosphate formed the less. Reaction themperature is very effect in formation of phase calcium pyrophosphate, because calcium pyrophosphate which the resulting in room themperature is more than in themperature 70oC. Beside that precursor compound that has not reacted in themperature70oC more less from room themperature, this is because precursor compound is more faster when heated. In sintering variationthemperature 110oC and 300oC the precursor formed is more and the best sintering themperature is 900oC.
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Judul: Sintesis Biphasic Calcium Phosphate dari Cangkang Telur Ayam
Abstrak: Biphasic Calcium Phosphate (BCP) are structured from hydroxiapatite (HA) Ca10(PO4)6(OH)2 and β-Tricalcium Phosphate (β-TCP) β-Ca3(PO4)2. HA are stable in difficlut phases when implanted, that’s why modification are needed with the addition of β-TCP which are soluble. The eggshells which undergoes calcination process at 1000 C for 5 hours contains CaO. The creation process of HA and β-TCP with precipitation method called wise drop, this process of creating BCP with the sonication technique with time variable from 5 to 30 minutes and composition variables of 50%:50%, 60%:40%, and 70%:30%. The size of the HA crystal are 55.28 nm, β-TCP are 51.82 nm, and the BCP are range from 43.85 nm – 50.25 nm. Based on the result of FTIR, can gained supporting information of that the samples gained are pure HA and pure β-TCP which are known from the structure complexity OH- and PO43- without the waste of CO32-. According to the EDS results on of the BCP_2a sample spot which are gained randomly, it’s known that on the sample of the BCP there is β-TCP with a Ca/P ratio of 1.46 or close to 1.5.
Keyword: β-Tricalcium Phosphate, biomaterial, Biphasic Calcium Phosphate, hydroxiapatite, sonication.

Judul: Tingkat Kedisiplinan Nelayan Pemilik Gill Net terhadap Peraturan Perizinan Penangkapan Ikan di Pusat Pendaratan Ikan Muara Angke Kelurahan Pluit, Jakarta Utara
Abstrak: Berdasarkan ketentuan yang tercantum dalam Undang- Undang Republik Indonesia Nomor 9 Tahun 1985 Tentang Perikanan, setiap kegiatan usaha perikanan diwajibkan memiliki izin usaha perikanan. Perizinan ini berfungsi untuk menjaga kelestarisn sumberdaya ikan, membina usaha perikanan dan memberikan kepastian usaha perikanan. Khusus di DKI Jakarta telah ditetapkan Keputusan Gubernur No. 109 Tahun 1977 Tentang Ketentuan Izin Usaha perikanan Di Wilayah DKI Jakarta. Dinas Perikanan diberikan wewenang oleh Gubernur DKI Jakarta untuk menerbitkan perizinan di bidang perikanan yang dalam pelaksanaannya dibantu oleh Suku Dinas Perikanan Wilayah Jakarta Utara.
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