Judul: Pengaruh Waktu Keseimbangan Terhadap Aktivitas Sperma Sapi Holstein - Friesian Yang Diawetkan Dalam Bentuk Semen Baku Butiran
Abstrak: Suatu penelitian faktorial 3 x 5 untuk mencari waktu keseimbangan yang optimum dalam proses pengawetan semen spi dalam bentuk butiran telah dilakauakn di Laboratorium Departemen Reproduksi, Fakultas Kedokteran Veteriner, Institut Pertanian Bogor, dari tanggal 4 Desember 1980 sampai dengan tanggal 16 Januari 1981.
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Judul: Pengaruh Susu Sapi Bubuk Dan Susu Sapi Segar Sebagai Bahan Pengencer Semen Cair Terhadap Aktifitas Sperma Dari Sapi Jantan Holstein-Friesian
Abstrak: Penelitian ini dimaksudkan untuk mengetahui susu sapi mana yang dapat memberikan daya tahan hidup paling lama bagi sperma selama disimpan dalam bentuk cair. Penelitian ini di lakukan di Jurusan Reproduksi, Fakultas Kedokteran Veteriner, Institut Pertanian Bogor, dimulai tanggal 12 Mei 1981 sampai tanggal 31 Mei 1981. Dalam penelitian ini digunakan semen yang berasal dari dua ekor sapi jantan Holstein-Friesian sebagai ulangan percobaan, masing-masing ditampung 2 ejakulat dengan vagina buatan. Hanya semen gang memenuhi karakteristik normal yang dipakai.
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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