Judul: Peran ekstrak tempe pada masa prapubertas terhadap kinerja reproduksi tikus betina Rattus norvegicus
Abstrak: Ekstrak tempe merupakan salah satu bentuk olahan kedelai yang mengandung fitoestrogen. Penelitian dilakukan untuk menganalisa potensi estrogenik tempe pada masa prapubertas terhadap kinerja reproduksi yang dilakukan menggunakan tikus (Rattus nonvergicus) betina berusia 21 hari. Tikus dibagi menjadi kelompok kontrol (tanpa diberi ekstrak tempe) dan kelompok perlakuan (diberi ekstrak tempe dengan dosis 6.25 g/kgBB). Pemberian ekstrak tempe dilakukan selama 28 hari. Pada umur 28, 42, dan 56 hari dilakukan pengambilan sampel ovarium, uterus dan darah. Parameter yang diamati adalah bobot badan, bobot ovarium, bobot uterus dan kadar hormon reproduksi berupa estrogen dan testosteron. Analisis data menggunakan metode Independent Samples T-Test dengan selang kepercayaan 95%. Hasil penelitian menunjukkan peningkatan bobot badan, bobot ovarium, dan bobot uterus kelompok perlakuan lebih tinggi dibandingkan dengan kelompok kontrol pada umur 42 hari. Pemberian fitoestrogen diduga dapat memberikan pengaruh berupa peningkatan estrogen dan testosteron yang terjadi pada umur 42 hari.
Keyword: Bogor Agricultural University, Institut Pertanian Bogor, IPB, Estrogen, Ovarium, Phytoestrogen, Prepuberty, Tempe extract, Uterus

Judul: Peran Ekstrak Tempe pada Masa Prapubertas terhadap Kinerja Reproduksi Tikus Betina Rattus norvegicus
Abstrak: Tempe extract is one of soybean processed that has phytoestrogens within it. Research was conducted to analyse the potency of tempe estrogenic at prepuberty periode to reproduction system in female rats (Rattus nonvergicus) at the age of 21 days. Rats were divided into control group (without given tempe extract) and treatment group (given 6.25 g/kgBW tempe extract). Tempe extract were given during 28 days. At the age of 28, 42, and 56 days, samples of ovarium, uterus, and blood were collected from the female rats. Parameters observed were body weight, ovarium weight, uterus weight, and reproduction hormone content which were estrogen and testosteron. Data were analysed using Independent Samples T-Test methode with 95% confidence interval. Results showed that increasing of ovarium weight of treatment group is higher than control group at the age of 42 days. Phytoestrogens given is assumed to increase estrogen and testosteron at female rats at the age of 42 days.
Keyword: estrogen, ovarium, phytoestrogen, prepuberty, tempe extract, uterus

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