Judul: Suatu Analisa Perbandingan Tentang Beberapa Faktor Teknis dan Ekonomis dari Ambai dan Gombang di Perairan Selat Bengkalis, Riau
Abstrak: Ambai dan gombang adalah dua jenis alat penangkap ikan yang sifatnya menetap (unmovable gear) yang banyak beroperasi di perairan Selat Bengkalis, Mau. Menurut klasifikasi sistem VOW EtRAlDT (1959), kedua jenis alat ini termasuk ke dalam type "bagnets with fixed mouth". Jenis hasil tangkapan utama dari ambai dan gombang ini adalah jenis udang rebon. Selain itu banyak pula tertangkap jenis-jenis: udang (Penaidae), lomek (Harpodon spp), geleber (Setipinna spp.) dan lain-lain.
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Judul: Suatu deskripsi serta analisis efisiensi teknis - ekonomis unit penangkapan " Gemplo " dan bagan tancap dalam penangkapan ikan teri di Kabupaten Pemalang, Jawa Tengah
Abstrak: Tujuan penelitian ini adalah untuk (1) Mengungkapkan deskripsi jaring gemplo dan bagan tancap serta pengoperasiannya, (2) Menganalisis kedua unit penangkapan tersebut untuk mengetahui alat mana yang lebih baik atau efisien untuk menangkap ikan teri. Penelitian dilaksanakan pada bulan Pebruari sampai Juli 1990, di Desa Widuri dan Asemdoyong, Kabupaten Demalang Jawa Tengah. Metode yang dipakai pada penelitian ini adalah metode pengambilan data yaitu dengan menggunakan metode survai dan metode analisis yaitu metode analisis efisiensi teknis dan analisis efisiensi ekonomis. Metode analisis efisiensi teknis menggunakan beberapa kriteria yaitu produksi alat per trip, produksi alat per tenaga kerja dan produksi alat per bulan operasi. Metode analisis efisiensi ekonomis menggunakan beberapa kriteria yaitu gross return per biaya total, gross return per biaya investasi, gross return per biaya operasi, biaya operasi per hasil tangkapan, gross return per jumlah trip, gross return per bulan operasi dan selisih gross return dengan biaya total.
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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