Judul: Usaha penanggulangan mastitis pada sapi perah yang disebabkan oleh escherichia coli (Coliform Mastitis)
Abstrak: Usaha penanggulangan mastitis merupakan tantangan yang besar. Walaupun langkah-langkah praktis untuk pengawasan mastitis telah dikembangkan, namun langkah-langkah tersebut kurang efektif untuk melawan coliform-mastitis, terutama yang disebabkan oleh Escherichiau.
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Judul: Mastitis infeksi oleh Echerichia coli dan gram negatip
Abstrak: Mastitis atau radang ambing merupakan suatu penyakit yang disebabkan oleh berbagai faktor, yang mempunyai tingkat kerusakan yang berbeda-beda serta berlangsungnya cukup ber- variasi hingga dapat berjalan residiva. Penelitian ini merupakan suatu inventarisasi bakteri Escherichia coli dan bakteri Gram Negatip lainnya, didalam kaitannya sebagai penyebab Mastitis. Ternak yang diteliti adalah sapi perah Frisien Holstein (FH) yang sedang laktasi berjumlah 145 ekor dan yang berpro- duksi menurun sebanyak 25 ekor. Lokasi peternakan di kecama- tan Beji-Depok dan Cisarua, kabupaten Bogor. Diagnosa terhadap Mastitits, baik untuk Mastitis Klinis maupun Mastitis Subklinis berdasarkan pengamatan/ inspeksi secara umum dan uji alkohol 70% pada contoh/ sampel air susu lapangan, selanjutnya diuji secara laboratoris. Dari 100 kuartir yang diuji diperoleh : 8 isolat (8%) Escherichia coli; 3 isolat (3%) Enterobacter aerogenes; 2 isolat (2%) Citrobacter sp.; 3 isolat (3%) Shigella sp. dan 13 isolat (13%) Alcaligenes fecalis.
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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