Judul: Pengaruh waktu pasang terhadap hasil tangkap udang karang (Panulirus spp) dengan jaring krendet di perairan baron, Kab. Gunung kidul DI. Yogyakarta
Abstrak: Udang karang atau lebih dikenal dengan nama udang barong (spiny lobster) merupakan salah satu dari marga Crustacea laut yang memiliki nilai ekonomis penting. Daur hidup yang kompleks dan prospek pembudidayaannya yang masih dalam taraf perhatian, menyebabkan perikanan udang karang masih tergantung pada usaha penangkapan di laut. Nelayan Kabupaten Gunung Kidul bersama dengan Dinas Perikanan Daerah Istimewa Yogyakarta telah berhasil memodi- fikasi alat tangkap yang kemudian dikenal dengan nama jaring krendet. Jaring krendet merupakan alat tangkap berumpan. Alat tangkap ini mulai beroperasi sejak awal tahun 1988. Pengoperasian (pemasangan dan pengambilan jaring) sangat tergantung pada pasang surut di perairan setempat, yaitu hanya dilakukan pada saat pasang turun. Adanya perbedaan waktu pasang surut selama 50 menit setiap hari menyebabkan waktu pemasangan akan pengambilan jaring berubah setiap hari.
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Judul: Pengoperasian krendet di terumbu karang Perairan Batu Karas, Kabupaten Ciamis : Orientasi kelayakan teknis, pengaruh perbedaan ukuran mata jaring dan hanging ratio
Abstrak: BPPI Semarang (1990) melaporkan bahwa di perairan Ba- ron, Kabupaten Gunung Kidul, DI Jogjakarta, udang karang ditangkap dengan bantuan alat tangkap Krendet. Alat tang- kap ini dioperasikan di perairan dangkal berkarang. Kren- det berasal dari bagian lembaran jaring bekas yang masih baik, lalu diberi rangka berbentuk lingkaran atau persegi empat. Untuk mengetahui kemungkinan dikembangkan dan dite- rapkannya, diadakan penelitian mengenai pengaruh ukuran mata jaring 1.5, 3 dan 4.5 inch dan hanging ratio 0.3 dan 0.5 terhadap jumlah hasil tangkapan. Uji coba alat dila- kukan dengan metode pengoperasian secara tunggal di terum- bu karang. Pengamatan secara kualitatif dilakukan terha- dap metode pengoperasian di terumbu karang (ketahanan ja- ring), keadaan umum (keutuhan anggota badan) dan keadaan tertangkap (terpuntal atau terjerat)...
Keyword: Krendet, Perairan Terumbu Karang, Udang karang, Mata jaring, Hanging ratio, Perikanan laut

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