Judul: Masalah produksi dan pemasaran udang windu (Penaeus monodon) proyek pengambangan budidaya tambak di Kabupaten Gresik
Abstrak: Penelitian ini bertujuan (1) Mempelajari perkembang an Proyek Pengembangan Budidaya Tambak dan melakukan kegaitan Proyek Benefit Monitoring Evaluasi terhadap aspek produksi dan pemasaran; (2) Mempelajari masalah-masalah yang dihadapi dan tingkat keuntungan usaha budidaya tambak udang windu dari petambak di lokasi proyek (3) Mengetahui hubungan antara bagian petambak (farmer's share) dengan biaya dan keuntungan pemasaran. Metode penelitian yang digunakan adalah metode survei. Tehnik pengambilan sampling dengan cara semi stratifikasi sampling, stratifikasi (pelapisan) proporsional dilakukan berdasarkan tehnologi usaha yang diterapkan antara lain ekstensif, semi-intensif dan intensif. Pengambilan sample dilakukan secara cak sederhana di lokasi Proyek Pengembangan Budidaya Tambak meliputi kecamatan Manyar dan Bungah, Kabupaten Gresik. Demi memudahkan pengumpulan data maka dilengkapi dengan daftar pertanyaan yang telah disusun. ...
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Judul: Pertumbuhan Udang Windu (Penaeus monodon Fabr.) pada Beberapa Tambak di Kabupaten Gresik, Jawa Timur
Abstrak: Penelitian ini dilakukan di Desa Brak Tebaloan Kecamatan Duduk Sampeyan, Kabupaten Gresik, Jawa Timur, mulai tanggal 16 Pebruari 1988 sampai dengan 7 April 1988 yang bertujuan untuk mengetahui pertumbuhan udang windu pada tambak yang b e r - H s d r i l l a s p dan yang t i d a k ber- Hydrilla sp. Disamplng i t u p e n e l i t i a n i n i juga l n g i n mengetahui pertumbuhan udang windu dengan dua cara pendekatan y a i t u : pertumbuhan dengan pengambilan contoh dan pertumbuhan individu. Pengukuran udang windu dilakukan sebanyak delapan k a l i dengan selang waktu seminggu sekali . Contoh udang windu yang tertangkap selama penelitian berukuran panjang karapas antara 1,20 - 3,40 cm untuk udang windu jantan dan 1,20 - 3,70 cm untuk udang wiadu betina.
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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