Judul: Prospek Pengembangan Usaha Budidaya Ikan Kerapu Lumpur pada Karamba Jaring Apung di PT Sembilan-Sembilan Sibolga, Sumatera Utara
Abstrak: Usaha pembesaran Kerapu Lumpur pada Karamba Jaring Apung merupakan suatu unit bisnis, sehingga sebelum diambil keputusan untuk mengembangkan usaha terlebih dahulu dikaji bagaimana kelayakan usaha tesebut. Dalam rangka mengembangkan usaha pembesaran Kerapu Lumpur di PT Sembilan-Sembilan Sibolga, maka perlu dilakukan pengkajian mengenai analisis usaha, analisis kriteria investasi dan prospek pengembangan usaha pembesaran Kerapu Lumpur pada Karamba Jaring Apung di PT Sembilan-Sembilan Sibolga. Perhitungan analisis usaha meliputi analisis pendapatan usaha clan analisis imbangan penerimaan dan biaya (RIG). Analisis usaha dilakukan untuk mengetahui keuntungan dari usaha pembesaran Kerapu Lumpur pada Karamba Jaring Apung. Analisis kriteria investasi dilakukan melalui perhitungan terhadap Net Present Value (NPV), Net Benefit-Cost Ratio (Net B/C) dan Internal Rate of Return (IRR)
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Judul: Analisis kelayakan usahatani pembesaran dan pemasaran ikan mas (Cyprinus carpio) budidaya keramba jaring apung (Kasus di Kecamatan Mande, Kabupaten Cianjur, Jawa Barat
Abstrak: Usaha perikanan dengan budidaya kolam jaring apung adalah usaha yang memanfaatkan perairan waduk sebagai media untuk melakukan budidaya pembesaran ikan. Pada mulanya, usaha ini diterapkan dengan tujuan meningkatkan kondisi sosial ekonomi masyarakat di sekitar waduk. Namun perkembangan selanjutnya usaha ini telah menunjukkan perkembangan yang pesat. Budidaya jaring apung ini banyak dilakukan di waduk Cirata, waduk Saguling,dan waduk Jatiluhur. Budidaya ikan dalam keramba jaring apung dapat diadopsi dengan baik oleh sekitar waduk sehingga dapat mendatangkan keuntungan bagi penduduk tersebut.
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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