Judul: Studi pelolosan ikan pada juvenile and trash excluder device (JTED) skala laboratorium
Abstrak: Hasil tangkapan sampingan (by-catch) yang dihasilkan dari pengoperasian trawl merupakan permasalahan yang menjadi perhatian dunia karena jumlah by-catch yang dibuang sangat besar dan melebihi hasil tangkapan utama. Kondisi ini jika dibiarkan dikhawatirkan dapat membahayakan kelestarian sumberdaya ikan.
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Judul: Penggunaan Jted (Juvenile and trash excluder device) pada jaring arad (mini trawl) di perairan Tegal, Jawa Tengah
Abstrak: Penelitian ini. bertujuan untuk membandingkan komposisi hasil tangkapan - sampingan jaring arad yang menggunakan JED (Jwenile and Trash Excluder Device) dengan jarak kisi 25,4 mm, 17,s mm, dan 10 mm, clan menentukan tmgkat pelolosan (escnpement level) jaring arad yang menggunakan JTED (Juverrile and Trash Excluier Device). Penelitian ini inidilaksanakan dengan mengikuti langsung kegiatan operasi penangkapan ikan di perairan tegal jawa tengah pada bulan September 2005. Hasil tangJapan total yang didapat selama penelitian adalah sebanyak 30326 Kg yaitu ikan sebanyak 57 spesies, moluska sebanyak 3 spesies, dan krwtase sebanyak 2 spesies. Ikan hasil tangkapan dominan terdiri dari Petek (Leiognafhus splendens), beloso (Sazaido sp), Tigawaja (Johnius sp), dan belo (Anodonrostom chacmdu)). Komposisi had tangkap jaring arad didominasi oleh ikan petek pada masing-masing jarak kisi. Pada jarak kisi 25,4 ram ikan petek bejumlah 7920 kg (82%), pada jarak kisi 17 J mm berjumlah 3827 kg (72%), pada jarak kisi 10 mm be rjumlah 32,78 kg (70%). Tmgkat pelolosan ikan pahug tinggi pada jarak kisi 25,4 mm dan 17,5 mm yaitu ikan beloso dengan nilai masing-masing 59% dm 42% pada jarak kisi 10 mm tingkat pelolosan paling tinggi yaitu udang dengan nilai 42%.
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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