Judul: Pengaruh Lama Perendaman dan Penambahan Kurma terhadap Kadar Vitamin C Infused Water Lemon-Daun Mint.
Abstrak: Penelitian secara umum bertujuan mengkaji pengaruh lama perendaman dan penambahan kurma terhadap kadar vitamin C infused water lemon-daun mint. Penelitian ini adalah penelitian eksperimental dilaksanakan pada bulan Maret-Agustus 2017 di Laboratorium Departemen Gizi Masyarakat, Institut Pertanian Bogor. Penelitian terdiri atas dua tahap yaitu penelitian pendahuluan dan penelitian utama. Penelitian pendahuluan bertujuan menentukan formula infused water dan dilanjutkan penelitian utama dengan menganalisis kadar vitamin C formula infused water menggunakan metode 2.6-dichloroindophenol. Hasil penelitian dianalisis dengan rancangan acak lengkap faktorial, diuji menggunakan analysis of variance (Anova) dan uji lanjut least significant difference (LSD). Formula infused water yaitu lemon-daun mint dan lemon-daun mint dengan tambahan kurma. Kadar vitamin C (mg/ml) infused water lemondaun mint berdasarkan lama perendaman 2, 4, 6, dan 12 jam adalah 0;0.024;0.130;0.070 dan infused water lemon-daun mint dengan tambahan kurma adalah 0;0.024;0.047;0.047 secara berurutan. Terdapat interaksi antara perlakuan lama perendaman dengan formula infused water dengan atau tanpa tambahan kurma. Lama perendaman 2 jam dan 4 jam infused water lemon-daun mint tanpa kurma dan dengan tambahan kurma tidak berbeda signifikan (p>0.05). Infused water lemon-daun mint dengan tambahan kurma pada lama perendaman 6 jam dan 12 jam tidak berbeda signifikan (p>0.05). Kadar vitamin C terbaik yaitu infused water lemon-daun mint tanpa kurma dengan lama perendaman 6 jam.
Keyword: infused water, kadar vitamin C, kurma, lama perendaman, lemon

Judul: Pengaruh perendaman dalam larutan kapur dan lama perendaman dalam larutan gula terhadap kandungan vitamin C dan daya terima manisan nenas
Abstrak: Tujuan penelitian ini adalah untuk mengetahui pengaruh perendaman dalam larutan kapur dan larutan gula terhadap kandungan vitamin C dan daya terima manisan nenas. Perlakuan yang diberikan adalah perendaman dalam larut- an kapur selama 30 menit dengan tiga tingkat konsentrasi yaitu 1, 2.5 dan 5 persen serta perendaman dalam larutan gula konsentrasi 65 persen selama satu, dua dan tiga hari. Pengamatan dilakukan terhadap sifat kimia dan fisik meliputi analisis vitamin C, kadar air, total asam, pH, zat padat terlarut (soluble solid) dan pengukuran kekerasan serta sifat organoleptik (rasa, kekerasan, warna dan bau) manisan nenas.
Keyword: vitamin c

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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