Judul: Beberpa Aspek Biologi dan Karakteristik Tubuh Ikan Kuniran (Upeneus tragula) di Perairan Muara Kamal, Jakarta Utara
Abstrak: Penelitian ini dilaksanakan mulai tanggal 29 Juli sampai 2 Desember 1991. Dua bulan pertama digunakan untuk pengambilan contoh ikan kuniran di Teluk Muara Kamal, Jakarta Utara, tiga bulan terakhir digunakan untuk analisa gonad di Laboratorium Balai Penelitian Veteriner (~alitvet,) Bogor. Tujuan penelitian ini adalah untuk mengetahui hubungan panjang berat, faktor kondisi, fekunditas, Tingkat Kematangan Gonad (TKG) serta karakteristik tubuh dan diuji dengan pendekatan keliling tubuh (girth) untuk menentukan selektifitas alat tangkap. Jumlah ikan kuniran yang tertangkap adalah 215 ekor, yang terdiri dari 114 ekor ikan betina dan 101 ekor ikan jantan, dengan kisaran panjang total 90-196 mm.
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Judul: Biologi Reproduksi Ikan Kuniran (Upeneus sulphureus Cuvier, 1829) di Perairan Selat Sunda.
Abstrak: Ikan kuniran (Upeneus sulphureus) merupakan sumberdaya ikan yang memiliki nilai ekonomis penting dan nilai gizi yang tinggi. Tingginya permintaan mengakibatkan upaya penangkapan semakin meningkat dan dikhawatirkan populasi ikan kuniran di perairan Selat Sunda menurun. Tujuan penelitian ini adalah mengkaji reproduksi ikan kuniran di perairan Selat Sunda meliputi tipe pemijahan, musim pemijahan, ukuran pertama kali matang gonad, dan potensi reproduksi sebagai salah satu dasar pertimbangan dalam penyusunan kebijakan pengelolaan sumberdaya ikan kuniran yang lebih tepat dan berkelanjutan. Penelitian ini dilaksanakan pada bulan Mei hingga Oktober 2018 di PPP Labuan, Banten. Metode yang digunakan dalam pengambilan ikan contoh adalah penarikan contoh acak berlapis berdasarkan panjang. Nisbah kelamin ikan kuniran jantan dan betina adalah 1:0,93 atau seimbang. Potensi reproduksi ikan kuniran berkisar antara 1405- 27756 butir telur untuk setiap individu betina. Musim pemijahan ikan kuniran terjadi selama periode pengamatan dengan puncak pemijahan terjadi pada bulan Mei, Agustus, dan Oktober. Tipe pemijahan ikan kuniran adalah total spawner. Ikan kuniran diduga pertama kali matang gonad pada ukuran panjang 130,4 mm untuk jantan dan 131,9 mm untuk betina.
Keyword: ikan kuniran, reproduksi, Selat Sunda

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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