Judul: Aplikasi kinetika arrhenius untuk pendugaan umur simpan dendeng sapi giling
Abstrak: Daging merupakan bahan pangan yang sangat mudah mengalami proses kerusakan (perishable food). bentuk awetan tradisional di daging Salah satu Indonesia adalah dendeng yang diproduksi secara meluas dan dikonsumsi oleh berbagai lapisan masyarakat. Proses pembuatan dendeng sapi giling termasuk kombi nasi antara proses "curing" dan pengeringan. Menurut Purnomo et al. (1983) dendeng termasuk dalam katagori "intermediate moisture meat product". Pendugaan umur simpan produk dendeng sapi giling akan sangat membantu produsen untuk mengetahui secara tepat masa kedaluwarsa produk yang dipasarkan dan akan membantu konsumen untuk memilih produk yang masih dapat dikonsumsi secara aman. Tujuan penelitian ini adalah untuk memperkirakan umur simpan dendeng sapi giling dengan menerapkan kinetika Arrhenius yang dinyatakan dalam konstanta laju peningka- tan kadar air, laju penyerapan oksigen dan laju perubahan warna dendeng sapi giling. ...
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Judul: Penentuan Umur Simpan Sosis Sapid an Sosis Ayam dalam Kemasan Vakum dengan Model Arrhenius
Abstrak: Penelitian ini bertujuan untuk menentukan umur simpan sosis sapi dan sosis ayam dalam kemasan vakum melalui evaluasi perubahan sifat fisik, kimia, mutu mikrobiologi, dan penelitian organoleptik, serta penerapan model Arrhenius terhadap parameter pH dan Nilai TBA sosis. Penelitian ini diawali dengan mempelajari proses produksi sosis di PT. Tirta Ratna Unit Badranaya, Bandung. Secara umum pembuatan sosis meliputi penanganan awal daging, penghancuran daging, penambahan bahan tambahan seperti gula, garam, fosfat, isolat kedele, skim, tapioka, karagenan, es, dan bumbu-bumbu, pembentukan emulsi, serta pengemasan.
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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