Judul: Application of neural network for predicting durian maturity and ripeness using destructive and non-destructive methods
Abstrak: Tujuan penelitian ini adalah untuk menerapkan model jaringan syaraf tiruan (JST) dalam menduga tingkat ketuaan dan kematangan buah durian dengan metode destruktif dan non-destruktif Untuk mencapai tujuan tersebut, ditentukan sifat fisiko-kimia dan akustik buah durian beserta hubungan antara sifat tersebut selama proses penuaan dan pematangan durian baik untuk buah durian yang rusak maupun tidak rusak
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Judul: Development of empirical model for non-destructive determination of maturity and ripeness of prime quality durian with ultra sonic
Abstrak: Durian (Durio zibethinus Mun) is one of the exotic tropical fruits in Indonesia having a high economic value. Determining the maturity and ripeness of durian non-destructively is a serious problem in selecting durian. Consequently, a non-destructive method for determinating of maturity and ripeness of the durian pulp is a real need. The objective of this research was to determine the maturity and ripeness of durian, non-destructively, through its acoustic characteristics. In achieving such objective, the research is divided into several specific objectives, i.e. (1) to determine the physical characteristics and the criteria of immature and mature durians; (2) to determine the acoustic characteristics of immature and mature durians; (3) to determine the impacts of artificial ripening on the acoustic characteristics of durian; (4) to determine the acceptability of consumer on the artificial and natural ripened durian; (5) to determine the acoustic characteristics of the fruit components; and (6) to develop the empirical model for determination the maturity and ripeness of durian. The material used in the research was a prime quality durian of Sunan cultivars, originated from the durian estate of Bernard Sadhani at Cianjur District, West Java.
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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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