Judul: Pendugaan Umur Simpan Susu UHT Cokelat dengan Metode Akselerasi Model Persamaan Arrhenius di PT Danone Indonesia
Abstrak: Information and labeling about shelf life becomes very important for industry, consumers, and distributors related on food safety and to provide quality assurance until the product delivered to the consumer. This research was conducted to estimate shelf life of UHT chocolate milk beverage with two steps which consisted of critical quality attribute screening and shelf life determination using Accelerated Shelf Life Testing (ASLT) method with Arrhenius approach. Test parameters used in this study were pH, sedimentation, color, thiobarbituric acid (TBA) values, and sensory . There were three conditions to store samples, i.e 350C, 400C, and 450C for nine weeks. Based on the results of determination of parameters test, the most appropriate parameter to estimate the shelf life of the product is pH, while the sedimentation and color parameter are less appropriate because the parameter value is relatively constant and it is not affected by temperature changes.
Keyword: UHT chocolate milk., shelf life, Arrhenius, Accelerated Shelf Life Testing

Judul: Pendugaan Umur Simpan Susu UHT Cokelat dengan Metode Uji Percepatan Umur Simpan di PT Danone Indonesia
Abstrak: This research was aimed to predict the shelf life of UHT milk chocolate packed in HDPE (High Density Poly Ethylene) bottle using an accelerated shelf life method. The shelf life of UHT milk chocolate were studied at 35 oC, 40 oC and 45 oC using Arrhenius model. The quality parameters observed were the physical properties pH value, TBA value and sensory evaluation (colour, aroma, taste, viscosity and overall). Based on its sensitivity and its activation energy, pH value was the most reliable parameter that predict product shelf life about 6 weeks if it stored at 30 oC (presumed as room temperature).
Keyword: UHT milk chocolate, shelf life, pH, accelereted

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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