Judul: Penelaahan Beberap Aspek Biologi Kepiting (Scylla serrata Forskal) Di Pertambakan Muara Gembong, Kabupaten Bekasi
Abstrak: Penelitian dilakukan pada bulan Mei 1984 sampai Agustus 1984. Kepiting yang didapat ukuran panjang karapasnya berkisar 42,75 mm - 114,95 mm, rata-rata 67,45 mm, dan simpangan baku 11,70 mm. Ukuran 60 mm 70 mm paling banyak tertangkap. Diantara yang tertangkap dijumpai kepiting bertelur. Nisbah kelamin jantan dan betina 1,60 1,00. Telaah hubungan panjang karapas (P, mm) dengan berat (B, gr) digambarkan: -5 5,4714.10 -4 B = 3,5911 2,9171 P untuk jantan, B = 7,9843.10 P untuk betina Telaah hubungan panjang karapas (P, mm) dengan lebar karapas (L, mm) untuk jantan dan betina digambarkan : L = 1,3692 P 1,0215 Di daerah pertambakan didapatkan tumbuhan Avicennia sp, Rhizophora sp, Pluchea indica, Wedelia biflora, Panicum repens, dan Cyperus sp. Kisaran suhu perairan 26,5 °C dan salinitasnya 24°/00 41°/00. - 35 °C,
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Judul: Menentukan Tingkat Kematangan Gonad Kepiting Scylla serrata (Forskal) secara Morfologis dan Kaitannya dengan Perkembangan Gamet
Abstrak: Penelitian ini dilakukan pada bulan Agustus hingga Oktober 1990, di Pertambakan Muara Kamal, Kecamatan Penjaringan, Jakarta Utara. Tujuan dari penelitian ini adalah untuk menelaah tingkat kematangan gonad secara morfologi dan kaitannya dengan perkembangan gamet secara histologi. Penelitian ini dibagi menjadi dua tahap, pertama pengamatan morfometri dan kedua pengamatan gonad, baik secara morfologis maupun histologis. Hasil enam kali pengambilan sampel didapat 112 ekor kepiting dengan lebar karapas 7,65-12,70 cm dengan berat 75,O-408,5 gram. Sampel didapat dari hasil tangkap nelayan menggunakan alat tangkap pancing pada hari pengambilan sampel. Sampel untuk nisbah kelamin sebanyak 306 ekor dengan berbagai ukuran.
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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