Judul: Analisis hasil tangkapan ikan kembung dengan alat tangkap purse di kodya Tanjung balai
Abstrak: Penelitian ini bertujuan untuk mengetahui gambaran umum perikanan kembung di Kotamadya Tanjung Balai, mengeta- hui produktifitas alat tangkap purse seine terhadap hasil tangkapan ikan kembung, mengetahui pengaruh umur hari bulan terhadap hasil tangkapan ikan kembung dan hasil tangkapan total serta mengetahui kelayakan usaha unit penangkapan purse seine. Pada saat penelitian ini jumlah purse seine yang terdapat di Kotamadya Tanjung Balai adalah sebanyak 167 unit dan sebagai sampel diambil secara acak 20 unit purse seine. Metode yang digunakan dalam penelitian ini adalah metode survei. Jenis data yang dikumpulkan meliputi data primer dan sekunder...
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Judul: Studi tentang Hasil Tangkapan Ikan Kembung dengan Alat Tangkap Purse Saine di Pelabuhan Perikanan Nusantara Belawan Kotamadya Medan, Sumatera Utara
Abstrak: Penel i t i a n i n i bertujuan untuk: ( 1 ) mengetahui d i s t r i - busi daerah penangkapan ikan kembung di Perairan Pantai Timur Sumatera Utara ( Selat Malaka ) sekitar Belawan, ( 2 ) membandingkan ukuran panjang ikan kembung h a s i l tangkapan purse seine menurut waktu dan tempat. ( 3 ) mengetahui kontribusi produksi ikan kembung terhadap produksi perikanan l a u t di Kecamatan Medan Kota Belawan. Metode yang digunakan dalam penelitian i n i ialah metode survei. Data yang dikurnpulkan ialah aspek teknis dan biologis yang me1iput.i spesifikasi perahu/kapal, a l a t tangkap, tenaga kerja, komposisi hasil tangkapan, musim dan daerah penangkapan. Pengambilan-contoh dilakukan berdasarkan prosedur yang dianjurkan oleh HOLDEN and RAITT (1974).
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Judul: Hybrid solar cells of ZnO nanoparticles/chlorophyll was modified metal ions (Zn2+ and Cu2+ )
Abstrak: Zinc Oxide (ZnO) is a n-type semiconductor with a wide the energy band (Band Gap) is 3.37 eV at room temperature and 3.34 eV at low temperature with a large exiton binding energy is 60 meV. ZnO has been synthesized by hydrothermal method, resulting in a decrease in particle size over the duration of the hydrothermal changes. Crystallographic structure of ZnO were characterized using XRD, has shown the characteristic pattern of a hexagonal wurtzite structure, the crystallite size increases to changes in particle size. Changes in particle size has also led to a change in the absorption peak of ZnO as has been demonstrated posted under test using the optical properties of UV-Vis spectrophotometer. Changes of this uptake has also led to changes in the energy band gap, which increases its band gap energy of the particle size. In electronic applications, especially in solar cells. Chlorophyll is considered less effective, because of their very nature are easily degraded as a result of several reactions which are acid, lighting and temperature. The results of the stability test using a halogen lamp 34 W/m2 for 5 hours, that the substitution of chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form more stable than natural chlorophyll. The characterization of the optical properties, the combination of ZnO / chlorophyll in the form of hybrid films has led to a shift in the absorption region of ZnO becomes more widely from the UV to Visible. ZnO/chlorophyll has absorption range of 350-515 nm, ZnO / Zn-feofitin 332-401 nm and 332-632 nm for Cu-feofitin. The combination of ZnO/chlorophyll and CuSCN as a solid electrolite in hybrid solar cell, a modified chlorophyll with metal ions Zn2+ and Cu2+ has been shown to form a more stable I-V curve. It is characterized by its fill factor value greater than natural chlorophyll. Nevertheless, solar cells with natural chlorophyll has been able to produce higher efficiency values of chlorophyll were substituted.
Keyword: Hydrothermal, ZnO/Chlorophyll modified, Hybrid Solar Cell