Judul: Distribusi spasial dan temporal struktur komunitas plankton di perairan karamba jaring apung jangari waduk Cirata
Abstrak: Penelitian ini bertujuan untuk memberi informasi mengenai distribusi spasial san temporal struktur komunitas plankton yang dapat digunakan sebagai bahan pertimbangan dalam kegiatan pemanfaatan Waduk Cirata.
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Judul: Struktur Komunitas Fitoplankton di Perairan Waduk Cirata, Jawa Barat
Abstrak: Waduk Cirata berpotensi menjadi waduk yang mempunyai tingkat kesuburan yang sangat tinggi (eutrofik) disebabkan oleh jumlah KJA yang meningkat setiap tahun. Hal ini dapat berpengaruh terhadap peningkatan unsur hara (nitrogen dan ortofosfat) yang berasal dari sisa pakan yang tidak termakan oleh ikan dan feses ikan di perairan. Tujuan dari penelitian ini adalah untuk menentukan struktur komunitas fitoplankton serta menghitung keterkaitan antara komunitas fitoplankton dengan nutrien (nitrogen dan ortofosfat) yang berada di perairan Waduk Cirata. Komposisi jenis fitoplankton yang ditemukan di perairan Waduk Cirata adalah Bacillariophyceae, Chlorophyceae, Cyanophyceae, dan Dinophyceae. Nilai indeks biologi (keanekaragaman (H’), keseragaman (E), dan dominansi (C)) menunjukkan bahwa keanekaragaman fitoplankton termasuk dalam kategori rendah, keseragaman tergolong tinggi, dan tidak ada spesies yang mendominasi. Hasil analisis regresi linear sederhana menunjukkan bahwa terdapat keterkaitan yang erat antara kelimpahan fitoplankton dengan ortofosfat (r = 0,64) dengan persamaan regresi Ln Y = 14,84 + 1,60 Ln P.
Keyword: Cirata reservoir, community structure, floating cage, phytoplankton

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