Judul: IPB (Bogor Agricultural University)
Abstrak: Penelitian telah dilakukan untuk mempelajari dinamika infeksi cacing parasit saluran pencernaan pada ayam Merawang dara di Peternakan Ayam AT3 Desa Bojong Kecamatan Tenjo Kabupaten Bogor. Sebanyak 544 ekor ayam Merawang berusia 1 bulan dipelihara dalam 2 kandang. Ayam tersebut dipelihara dalam kandang litter selama 2 bulan dan di kandang battery selama 5 bulan sehingga terpapar cacing secara alami. Setiap bulan diambil sampel feses serta ditimbang bobot badannya mulai bulan November 2002 - Mei 2003. Selama penelitian ditemukan dua jenis telur cacing yaitu Ascaridia dan Hartertia. Hasil penelitian menunjukkan bahwa iklim yang meliputi curah hujan, suhu rata-rata dan kelembaban, mempengaruhi dinamika infeksi cacing parasit saluran pencernaan pada ayam Merawang dara. Tidak ada korelasi antara perubahan bobot badan dengan nilai TTGT Ascaridia (r= 0,2 P>0,05 untuk kandang 1 dan r=0,067 P>0,05 untuk kandang 2).
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Judul: IPB (Bogor Agricultural University)
Abstrak: Infeksi cacing nematoda parasitik Ascaridia galli berlangsung di dalam usus halus unggas. Penelitian ini dilakukan untuk memurnikan dan menganalisa karakter protease dari ekskretori/sekretori stadium L3 A. galli sebagai pemicu pertahanan mukosa berdasarkan proliferasi dan hiperplasia sel goblet, sel mast mukosa, sel eosinofil pada usus halus ayam petelur. Dosis 6000 L2 diberikan langsung ke dalam oesofagus 100 ekor ayam, dan tujuh hari kemudian larva yang sudah menetas (L3) diambil kembali dari dalam usus halus. L3 dikultur secara in vitro dalam medium Rosswell Park Memorial Institute (RPMI 1640), pH 6,8, tanpa merah fenol dalam inkubator pada temperatur 37oC dan 5% CO2 selama 3 hari. Ekskretori/sekretori dipreparasi dari produk metabolisme L3 yang dilepaskan ke dalam medium kultur. Protease dimurnikan dengan ammunium sulfat, dialisis yang diikuti dengan kromatografi filtrasi gel matriks sephadex G-100. Matriks DEAE sephadex A-50 digunakan untuk pemurnian protease melalui kromatografi anion exchange. Aktivitas protease diuji pada kasein 2%. Aktivitas protease dikaji terhadap sensitivitas inhibitor, temperatur, dan pH. Konsentrasi protein dihitung mengikuti metode Bradford. Berat molekul protease diestimasi melalui sodium dodecyl sulphate polyacrylamide gel electrophoresis (SDS PAGE).
Keyword: Unggas, Infeksi cacing nematoda parasitik, Rosswell Park Memorial Institute, Parasitic nematode, Cacing Ascaridia galli, Enzim protease pada eksretori/sekretori cacing, Protease dari eksretori/sekretori

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