Judul: Inventarisasi dan Kelimpahan Ikan-Ikan di Waduk Lahor, Tawa Timur
Abstrak: Inventarisasi dan penenlitian kelimpahan ikan-ikan dilakukan dari akhir bulan Desember 1978 sampai dengan akhir bulan Februari 1979 di Waduk Lahor, Jawa Timur. Pengambilan contoh ikan di enam wilayah penangkapan yaitu Wilayah A, B, C, D, E dan F dilakukan dengan menggunakan jaring insang produksi, jaring insang percobaan dan jala. Jaring insang produksi dan percobaan berukuran mata jaring 3 cm, 5 cm, 6 cm, 7 cm, 10 cm dan 11 cm, sedangkan jala berukuran mata jaring 3,1 cm dan 4,6 cm. Ikan yang tertangkap di waduk ini adalah keprek, tawes, tawes merah, wader, nilem, palung, sengkaring, mujair, nila, gabus, lele, julung-julung, kepala timah dan ikan seribu. Ikan keprek, tawes, tawes merah, wader, palung, nilem dan mujair tersebar di seluruh wilayah perairan Waduk Lahor (Wilayah A, B, C, D, E dan F). Ikan lele didapatkan di Wilayah B, D, dan E. Ikan gabus didapatkan di Wilayah A, D, E dan F. Ikan sengkaring hanya didapatkan di Wilayah C dan ikan nila hanya di Wilayah D. Ikan-ikan lainnya yaitu julung-julung, kepala timah dan ikan seribu tidak ditentukan penyebaran dan kelimpahan relatifnya. ...
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Judul: Aspek Biologi Reproduksi Beberapa Jenis Ikan di Waduk Lahor, Jawa Timur
Abstrak: Penelitian aspek biologi reproduksi beberapa jenis ikan dilakukan sejak pertengahan bulan Desember 19778 sampai dengan akhir bulan Februari 1979. Ikan contoh ditangkap dengan "eksperimental gillnet" berukuran mata jaring 3,51; 5; 7,5 dan 8,5 cm. Alat tangkap lain yang digunakan adalah : gill net reproduksi, jala lempar dan pancing.
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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