Judul: Aspek Biologi Reproduksi Ikan Lemuru (Sardinella longiceps C.V.) di Perairan Teluk Sibolga, Sumatera- Utara
Abstrak: Ikan lemuru (Sardinella longiceps C.V.) merupakan ikan ekonomis penting Saat ini informasi biologis ikan lemuru di perairan Sibolga belum ada. Informasi tersebut dibutuhkan untuk tujuan pengelolaan kegiatan perikanan di wilayah tersebut. Penelitian bertujuan untuk mengetahui aspek biologi reproduksi ikan lemuru (Sardinella longiceps C.V.).
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Judul: Studi tentang reproduksi ikan lamuru (Sardinella lemuru Bleeker, 1853) di Perairan Selat Alas Nusa Tenggara Barat
Abstrak: Perairan Selat Alas terletak di antara Pulau Lombok dan Sumbawa, Propinsi Nusa Tenggara Barat dengan luas sekitar 20542 km². Perairan tersebut merupakan suatu bentuk perairan yang relatif sempit dan dangkal dengan kedalaman rata-rata kurang dari 100 m, produktivitasnya tinggi karena terjadi proses air naik (upwelling), diperkirakan mulai dari bulan Mei sampai Nopember. Ikan Lemuru merupakan jenis ikan yang dominan tertangkap di perairan tersebut, produksinya berkisar antara 1380.7 18053 ton per tahun. Rataan per tahunnya sebesar 6395 ton (53%) dari produksi total dalam periode tahun 1984 - 1994, sedangkan rataan setiap bulannya sebesar 900 ton dalam peri- ode 1990 - 1994, dan kisaran bulanannya antara 0.3 94 ton. Fluktuasi hasil tangkapan ikan lemuru di perairan Selat Alas bervariasi dari tahun ke tahun. Oleh karena itu dalam penelitian ini pengkajian masalah dititikberatkan pada aspek- aspek reproduksi dan lingkungan perairan yang mempengaruhi pola reproduksi ikan lemuru. Pola reproduksi adalah segala aktivitas yang berkaitan dengan fungsi perkembangbiakan..dst
Keyword: Ikan Lamuru

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