Judul: Inventarisasi Parasit pada Ikan Laut
Abstrak: Organisme parasit diketahui sebagai organisme yang hidupnya menumpang pada organisme lain, termasuk ikan. Tidak kurang dari 10.000 spesies parasit diketahui menginfeksi ikan. Adanya parasit di tubuh ikan dapat mengurangi nilai ekonomis ikan. Keberadaan parasit dapat menghambat perkembangan udaha budidaya juga berkaitan dengan kesehatan masyarakat. Dengan demikian informasi tentang parasit ikan diperlukan untuk membantu mengatasi masalah-masalah serangan psrasit di usaha budidaya, juga mencoba untuk memberikan informasi kepada masyarakat tentang zoonosis.
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Judul: Inventarisasi parasit pada ikan dan kustase laut
Abstrak: Perkembangan marikultur di Indonesia pada era tahun 90-an sangat begitu cepat, seiring dengan tingkat permintaan konsumen terhadap produk perikanan yang begitu meningkat. Oleh karena itu para akuakulturis dituntut untuk meningkatkan produktivitasnya. Produktivitas sangat dipengaruhi oleh banyak faktor diantaranya tingkat kelangsungan hidup organisme yang dibudidayakan. Kelangsungan hidup pada ikan pun dipengaruhi oleh banyak faktor. Salah satu yang mempengaruhi tingkat kelangsungan hidup adalah tingkat kesehatan ikan. Organisme parasit merupakan salah satu masalah dalam dunia kesehatan ikan. Pengetahuan mengenai jenis parasit terutama parasit ikan laut di Indonesia masih sangat jarang diketahui. Padahal keberadaannya sangatlah mempengaruhi produktivitas usaha budidaya. Oleh karena itu penelitian mengenai pengenalan jenis parasit pada ikan laut sangat perlu dilakukan, dengan demikian diharapkan dapat ditemukan solusi pencegahan dan pengobatannya. Penelitian ini dilakukan dari bulan Februari Mei 1999 dengan lokasi pengambilan sampel di TPI Muara Angke Jakarta Utara. Sedangkan pemeriksaan ikan sampel dilakukan di Laboratorium Kesehatan Ikan, Jurusan Budidaya Perairan, Institut Pertanian Bogor. Ikan sampel yang diperiksa adalah ikan kerapu balong (Epinephelus bontoides), beronang (Siganus javus), sebelah (Psettodides erumei), rajungan (Portunus pelagicus), pari (Raja sp) dan layang (Decapterus russeli). Kemudian dilakukan serangkaian pemeriksaan terhadap kondisi morfologi organ luar dan organ dalam. Apabila ditemukan indikasi adanya parasit, segera dilakukan pengawetan terhadap parasit tersebut. Pendataan parasit meliputi prevalensi, intensitas dan identifikasi berdasarkan sejumlah literatur....
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Judul: Enhancement of photon absorbtion on BaxSr1-xTiO3 thin films semiconductor using photonic crystals.
Abstrak: In this research, has been conducted BaxSr1-xTiO3 (BST) thin films manufacturing for mole fraction x = 0.25, 0.35, 0.45, and 0.55; and concentration of 1 molar using chemical solution depositon (CSD) method. The materials, which are used in this research, are barium acetate [Ba(CH3COO)2, 99%], strontium acetate [Sr(CH3COO)2, 99%], titanium isopropoxide [Ti(C12O4H28), 97.999%], gallium trioxide [Ga2O3], 2-methoxyethanol [H3COOCH2CH2OH, 99%] and 1 x 1 cm of transparent conductive oxide (TCO) glass as substrate. Two BST thin films are made that for BST thin films which are doped by 10% galium (BGST) as p-type layer and pure BST solution as n-type. BST solution is made by reacting barium acetate [Ba(CH3COO)2, 99%], strontium acetate [Sr(CH3COO)2, 99%] and titanium isopropoxide [Ti(C12O4H28)] into 2-methoxyethanol solvent [H3COOCH2CH2OH, 99%] in accordance with mass gram for each x value. While, BGST solution is made in the same way as BST solution, plus adding gallium at 10% of the mass of BST. Once all materials are reacted, then vibrated using ultrasonic for 90 minutes, and followed by coating BGST / BST on the TCO substrate. Once the layer is formed, then annealed for 15 hours at temperature of 500 °C with increasing rate of 1.67 oC/minute. Characterizations of BST thin films with or without photonic crystals include the absorbance and transmittance in the visible light spectrum, as well as the electrical photoconductivity characterizations. From BST thin films without photonic crystals indicate that our thin films have light absorption area on almost the entire range of the visible light spectrum even to the infrared range with absorption value over than 67.6%, in addition, it can be seen that the maximum absorbance of BST thin films for all mole fractions lie in blue to green light spectrum region, 457 nm ≤ λ ≤ 570 nm and the minimum in yellow to red light spectrum region, 570 nm ≤ λ ≤ 678 nm. The largest absorbance is found at x = 0.25 with average absorbance value of 92.04% and maximum and minimum absorbance peaks at wavelength of 500.89 and 657.72 nm, respectively. At x = 0.35, average absorbance value decreased to 83.55% with maximum and minimum peaks at 505.73 and 613.68 nm, respectively. Then increased to 91.16% at x = 0.45 with maximum and minimum peaks at 506.04 and 618.56 nm, respectively. At x = 0.55, average absorbance value decreased to 80.12% with maximum and minimum peaks at 507.85 and 608.79 nm, respectively. Moreover, it can be seen that the addition of barium mole fraction leads to wider maximum absorbance or minimum transmittance peaks and narrower minimum absorbance or maximum transmittance peaks in the same range of the green and blue & red light spectrums, respectively. BST thin films with photonic crystals show increasing in absorption for all x values in the range of 3.04 into 13.33%. At x = 0.25, average absorbance percentage increased 3.96% from 92.4 into 95.68%, for x = 0.35 average percentage increased 7.07% into 89.45 from 83.55%. Furthermore, average absorbance of BST thin films at x = 0.45 increased 3.04% from 91.16 into 93.93% and x = 0.55 has
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