Judul: IPB (Bogor Agricultural University)
Abstrak: Tujuan penelitian ini ialah mencari informais dasar mengenai aspek-aspek yang berakitan dengan biologi reproduksi kambing Kacang jantan antar lain : umur dan bobot badan saat mencapai dewasa kelamindan dewasa tubuh, produksi semen, ukuran dan morfologi sperma, pola perkembangan kuantitas dan kualitas semen, perkembangan testes. Hubungan lingkar testes dan bobot badan dengan jumlah sperma yang diejakulasikan, kalakuan kelamin, pengaruh cara penampungan terhadap kuantitas dan kualitas semen, dan ukuran alat kelamin jantan. Untuk tujuan tersebut dilakukan pengamatan terhadap 10 ekor kambing Kacang jantan yang baru disapih selama dua tahun. Semua kambing di beri perlakuan sama dan tingkah laku reproduksi kambing setiap minggu diamati.
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Judul: IPB (Bogor Agricultural University)
Abstrak: PEnelitian ini bertujuan untuk mengetahui : (1) pernorman induk yang meliputi umur kawin dan beranak pertama, lama banting, kawin kembali sesudah beranak, panen anak (calf crop), jarak beranak (calving interval); (2) pengaruh umur induk terhadap produksi susu, bobot lahir, laju pertumbuhan anak, bobot anak umur 4 dan 10 bulan; (3) kolerasi bobot lahir dengan bobot induk, bobot lahir denan bobot umur 10 dan 240 hari, ripitabilitas produksi susu dan bobot lahir serta beberapa faktor koreksi.
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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