Judul: Penentuan Parameter Kritis untuk Pendugaan Umur Simpan Susu UHT yang Diasamkan dengan Metode Arrhenius di PT Danone Dairy Indonesia
Abstrak: Penelitian ini bertujuan untuk menentukan parameter kritis yang akan digunakan untuk menduga umur simpan susu UHT yang diasamkan menggunakan Metode Arrhenius. Parameter yang diujikan untuk menentukan umur simpan adalah pH, sedimentasi, total asam tertitrasi, warna, dan sensori. Penentuan umur simpan dari susu UHT yang diasamkan dilakukan dengan menyimpan sampel pada suhu 350C, 400C, dan 450C selama sembilan minggu. Sampel memiliki nilai awal untuk pH sebesar 3,72; total asam tertitrasi sebesar 0,43; persen sedimentasi sebesar 2,65%; nilai L sebesar 82,58; dan nilai absorbansi 3,889. Parameter kritis yang digunakan untuk menentukan umur simpan dari susu UHT yang diasamkan adalah parameter warna. Umur simpan produk untuk penyimpanan suhu 300C, 350C, 400C, dan 450C adalah 27 minggu, 15 minggu, 8 minggu, dan 4 minggu.
Keyword: model arrhenius, parameter kritis, susu UHT yang diasamkan, umur simpan

Judul: Penentuan Parameter Pengujian dalam Pendugaan Umur Simpan Produk Minuman Susu UHT Asam di PT Danone Indonesia
Abstrak: Shelf lifeis one of theinformationsthatmust be statedbythe food manufactureron the packaging. It is regulatedin theFoodAct1996 andGoverment Regulation No.69of 1999. This researchpurpose isdetermining the test parameters to estimate shelf life ofUHT acidifiedmilkbeverageusingArrhenius acceleratedtest method. Determination of test parameterswasperformed on5quality parameterssuch aspH, sedimentation, sensoricalcharacteristics, color, andtotal acidityfor products which kept in 35oC, 40oC, and45oC for5 weeks. From sensory test results showed that color, taste, and aroma of products significantly different during storage time while the viscosity was not changing.Based on the results the appropriate parameters to predict the shelf life ofthis product are color, sediment and sensory test, while the pH value and the total acidityhave no impact on the product during the shelf life.
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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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