Judul: Hubungan Antara Luas Uat Daging Mata Rusuk Dengan Bobot Karkas Pada Sapi Peranakan Ongole, Sapi Bali Dan Kerbau
Abstrak: Tujuan penelitian ini adalah untuk mengetahui hubungan luas urat daging mata rusuk dengan bobot karkas. Luas urat daging mata rusuk yang diamati/diukur yaitu urat daging anatara tulang rusuk ke 9 dan tulang rusuk ke 10 dan bobot karkas yang diukur adaalh bobot karkas segar (Hot Carcase Waight).
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Judul: Hubungan Antara Lingkar Carpus Dengan Bobot Karkas Dingin, Bobot Daging "Chuck", Bobot Daging "Round" Bobot Total Daging Karkas Kiri Dan Panjang Karkas Pada Sapi Bali Jantan
Abstrak: Penelitian untuk mengetahui hubungan antara ukuran lingkar carpus dengan bobot karkas dingin, bobot daging "chuck", bobot daging "round", bobot total daging karkas kiri dan panjang karkas pada sapi Bali jantan telah dilakukan di PT. Sampico Adhi Abattoir dan PT. Andhini Sakti, Bekasi, Jawa Barat, mulai awal bulan Februari sampai pertengahan bulan Maret 1981. Seratus tujuh belas ekor sapi Bali jantan telah diikuti proses pemotongannya untuk memperoleh data yang di- perlukan. Penentuan umur dilaksanakan dengan pemeriksaan gigi. Penelitian ini dirancang sehingga hubungan antara ukuran lingkar carpus dengan bobot karkas dingin, bobot daging "chuck", bobot daging "round", bobot total daging karkas kiri dan panjang karkas pada empat tingkat umur dapat ditentukan dengan analisa regresi sederhana. Untuk menguji pengaruh lingkungan asal ternak dilakukan analisa peragam (analysis of covariance). Hasil penelitian menunjukkan, bahwa semua koefisien korelasi sederhana antara ukuran lingkar carpus dengan bobot karkas dingin, bobot daging "chuck", bobot daging "round", bobot total daging karkas kiri dan panjang karkas pada empat tingkat umur adalah positif dan nilainya berki- sar antara 0,482 sampai 0,933 serta memperlihatkan hasil yang nyata (P<0,05) dan sangat nyata (P <0,01). Hasil ujit terhadap koefisien regresi sederhana didapat- kan sangat nyata (P <0,01), kecuali untuk hubungan antara lingkar carpus dengan panjang karkas pada tingkat umur >5 tahun didapatkan nyata pada P 0,05. ...
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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