Judul: Aktivitas fisiologi dan prostaglandin F2 alfa pada proses reproduksi sapi dan domba
Abstrak: Prostaglandin merupal<an salah satu hormon yang berperanan penting dalam proses-proses reproduksi. Tulisan ini adalah sebagai review sejauh mana aktivitas Prostaglandin F2B( (PGF 2B) dalam pengendalian proses reproduksi dan bagaimana bekerjanya secara fisiologis. Reproduksi atau perkembangbiakan adalah suatu kemewahan fungsi tubuh yang secara fisiologik tidak vital bagikehidupan individual tetapi sangat penting bagi kelanjutan keturunan suatu jenis atau bangsa hewan. Secara garis besar proses reproduksi terdiri atas pubertas, musim kelamin, siklus berahi, fertilisasi, kebuntingan dan kelahiran.
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Judul: Kegunaan prostaglandin F-2 ALFA untuk mengiatkan produksi ternak sapi
Abstrak: Prostaglandin (PG) yang terdapat pada hampir seluruh jaringan tubuh terdiri atas PGE, PGF, PGA, PGC, dan PGB. Yang digunakan dalam bidang reproduksi terbatas, yaitu prostaglandin E 1, E 2, dan F 2 alfa, Nama dagang yang beredar di pasaran cukup banyak karena setiap produsen memberikan nama sendiri-sendiri. Prostaglandin F 2 alfa ini berfungsi dalam . berbagai proses fisiologik. Dan cara pemberian bisa intramuskular, intrauterin, atau cornua uteri ipsilateral. Akibat pemberian ini terjadilah regresi korpus. luteum, menimbulkan berahi yang diikuti dengan ovulasi sehingga sapi siap untuk diinseminasi. Dapat disimpulkan bahwa PGF-2 alfa merupakan preparat yang praktis untuk dipakai di ladang ternak karena dapat mengatasi kesulitan mendeteksi berahi, dapat pula menginduksi berahi yang disertai dengan ovulasi, dan kegiatan-kegiatan produksi ternak.
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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