Judul: Rancangan Sistem Kontrol Suru Pada Waterbathdan Chamber Yang Terkait Dengan Membran
Abstrak: Telah dilakukan penelitian mengenai sistem pengukuran konduktansi membran di berbagai suhu. Dan didapatkan ballWa masih banyak kekurangan daiam sistem kontrol suhu pada rancangan sistem pengukuran konduktansi membran di berbagai suhu.
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Judul: Kajian konduktansi membran selulosa asetat yang direndam dalam pati jagung, minyak sawit, protein BSA dan sari buahnenas
Abstrak: Membran adalah suatu lapisan yangmembatasi dua daerah yang memiliki karakter yang berbeda. Karakteristik membran meliputi sifat listrik, termal, mekanik dan sebagainya. Salah satu sifat kelistrikan adalah konduktansi membran. Konduktansi membran dapat ditenntukan dengan mengukur arus dan tegangan membran. Penentuan tegangan membran dilakukan dengan cara meletakkan membran di dalam chamber yang di isi larutan elektrolit KCl, kemudian dialiri arus denagn nilai tertentu, sehingga tegangan membran dapat di ukur. nilai tegangan membran digunakan untuk menghitung konduktansi membran. Konduktansi membran dipengaruhi oleh suhu. Membran yang telah direndam didalam media perendam memiliki konduktansi yang lebih kecil dari membran bersih. Hal ini menandakan telah terjadi fenomena fouling. Fenomena fouling dapat mengakibatkan jari-jari pori rata-rata membran menjadi lebih kecil.
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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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