Judul: Penentuan Model Umur Simpan Produk Minuman Mengandung Susu Berkemasan Botol HDPE dengan Pendekatan Arrhenius di PT Danone Indonesia
Abstrak: Informasi umur simpan produk pangan sangat penting dalam menjamin mutu untuk waktu yang lama. Kewajiban pencantuman umur simpan telah diatur dalam undang-undang Pangan No. 7 tahun 1996 serta peraturan pemerintah No. 69/1999 tentang Label dan Iklan Pangan. Produk minuman mengandung susu yang disterilisasi memiliki umur simpan yang lama, maka dibutuhkan metode yang cepat, tepat, dan efisien untuk menentukan permodelan umur simpan, yaitu dengan metode akselerasi model Arrhenius. Tujuan penelitian ini yaitu membuat model umur simpan untuk memprediksi waktu penyimpanan dan melihat gambaran nilai pH dan sensori pada batas waktu yang telah ditetapkan PT Danone Indonesia serta melihat korelasi antara parameter pH dan sensori. Penelitian ini dilakukan dengan menggunakan produk minuman mengandung susu berperisa strawberry cream (SC) kemasan HDPE (High Density Polyethylene). Pengujian dilakukan dengan masing-masing disimpan dalam penyimpanan normal pada suhu 30 0C selama 6 bulan dan penyimpanan akselerasi pada suhu 35 0C, 40 0C, dan 45 0C selama 6 minggu. Pengambilan data dilakukan berdasarkan parameter kritis yaitu parameter pH dan sensori dengan beberapa atribut yaitu Kualitas Keseluruhan, Intensitas Keseluruhan, Kemanisan, Rasa Susu, Aroma Asing, dan Intensitas Keseluruhan. Modeling umur simpan yang paling representatif digunakan yaitu model ekponensial 2P atau model Arrhenius ordo reaksi 1. Umur simpan produk ditentukan oleh faktor kemasan, suhu proses UHT, dan formula. Korelasi hubungan antara pH dan sensori menunjukkan penurunan nilai pH diikuti dengan penurunan nilai sensori sampai batas standar sehingga didapat waktu umur simpan yaitu 24 minggu.
Keyword: susu, umur simpan, metode akselerasi, model Arrhenius

Judul: Penentuan model pendugaan umur simpan dengan pendekatan Arrhenius pada minuman mengandung susu kemasan kantong di PT DDI
Abstrak: Food safety and food quality need to be guaranteed by the manufacturer as a protection for consumer safety. The guarantees can be provided through the determination of shelf life using the model of shelf life prediction. This study was conducted to determine the kinetic shelf life prediction model with the Arrhenius approach for products containing milk chocolate, processed by UHT and packed with a pouch. Furthermore, this study are aimed to determine the critical factors that influence pH and sensory, to choose the most appropriate sensory attributes in shelf life prediction, and find the correlation between pH and sensory parameters with shelf life based on kinetic model. Prediction models were obtained through the analysis of the products, which were stored at 35oC, 40oC, 45oC for 6 weeks and at 30°C for 6 months, and based on the pH and sensory parameters (overall quality, overall intensity, sweetness, milkiness, flavor intensity and off notes). Based on analysis, the output models are exponensial 2P model, exponensial 3P model and linier model. The test results showed that the most suitable model for estimating shelf life are the exponential 2P model for pH parameter and the linier model for sensory parameter. Packaging is a factor that influence pH alteration, whereas for sensory parameters are the processes and formula.
Keyword: Bogor Agricultural University (IPB), milk, Arrhenius, modeling, shelf life

Judul: Distribution and Diversity of Ectoparasite Mites on Geckos in Indonesia
Abstrak: Data on the diversity and dispersal of parasitic mites on house geckos in Indonesia are very scarce. In this work, the distribution and diversity of mites living on three species of house geckos, namely Cosymbotus platyurus, Hemidactylus frenatus, and H. garnotii collected throughout Indonesia, has been elaborated. Geckos and mites were captured and immediately preserved in 70% ethanol. Whole mount of the mites was prepared by clearing in lactophenol followed by mounting on polyvinyl lactophenol solutions. The SEM preparation was conducted to examine the detail morphological characters of the mites. The results showed that among 448 individuals of geckos, 221 geckos were infected by Geckobia mites. Prevalences of C. platyurus, H. frenatus, and H. garnotii infested by mites were 14.8%, 50.69%, and 79.6%, respectively. Three different spesies of Geckobia (G1, G2, and G3) could be differentiated; and based on similarities of their morphological characters to ones described in published literatures, Geckobia G2 is Geckobia glebosum and Geckobia G3 is Geckobia bataviensis while G1 could not be identified to the species level. The highest mean intensity of Geckobia G1 infestation was found on H. garnotii (I=7.0), G. glebosum infestation on H. frenatus (I=3.5), and G. bataviensis infestation on H. garnotii (I=11.8). In general, C. platyurus was infested by the least number of mites. Geckobia G1 were found living on the skin folds on the claws, G. glebosum were found mainly on the body and thigh, and G. bataviensis were found on almost all parts of the host’s body. Geckobia mites are distributed randomly throughout Indonesian Archipelago, following the pattern of distribution of their hosts. So it is concluded that Geckobia G1, G. glebosum, and G. bataviensis are sympatric.
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