Judul: Keanekaragaman dan Pengelompokkan Tungau Geckobia Berdasar Ketotaksi Tungkai pada Cicak Asal Banjarnegara
Abstrak: Ektoparasit adalah organisme yang hidup pada permukaan tubuh inang. Penelitian ini bertujuan untuk menginventarisasi, mengidentifikasi dan mengelompokkan tungau ektoparasit Geckobia pada cicak asal Banjarnegara berdasar ketotaksi tungkai, serta menganalisis prevalensi dan intensitas infestasi tungau. Analisis jumlah tungau pada tubuh cicak dilakukan dengan menghitung nilai prevalensi dan intensitas infestasi. Identifikasi berdasar karakter morfologi ditemukan tiga belas morfospesies Geckobia (G1, G2, G4, G5, G6, G7, G10, G12, G13, G18, G20, G21, dan G22). Berdasar ketotaksi tungkai, morfospesies G2 dan G6 termasuk kelompok Geckobia grup 1, G10 termasuk kelompok G. gleadoviana, G13 termasuk kelompok G. Keegeni dan G20 termasuk kelompok G. gymnodactyli. Tungau G1, G4, G5, G7, G12, dan G18 berturut-turut termasuk kedalam grup 9, 10, 5, 6, 11, dan 8, sedangkan G21 dan G22 dimasukkan kedalam Geckobia grup baru yaitu grup 12 dan 13. Prevalensi total cicak terinfestasi tungau sebesar 51%. Nilai intensitas infestasi tungau tertinggi pada cicak C. platyurus adalah 4.0 oleh G21. Intensitas infestasi tertinggi terhadap cicak H. frenatus dengan nilai 7.0 oleh larva dan 5.1 oleh G7. Intensitas infestasi total tungau pada cicak H. frenatus lebih tinggi dari C. platyurus.
Keyword: ektoparasit, ketotaksi, morfologi, tungau

Judul: Inventarisasi dan Identifikasi Tungau Ektoparasit pada Cicak di Kabupaten Cianjur
Abstrak: Ectoparasite mites are parasitic organisms that live on the surface of the host, sucking the blood or feed on hair, fur, skin, or skin secretions. This research aim to inventarisation and identification of mites ectoparasites on gecko in Cianjur areas. The research was conducted from January 2012 until July 2012. Gecko and mites were collected and preserved in 70% alcohol. Whole mount of the mites was prepared used polyvinyl alcohol media. The result showed that there are three species of gecko (Cosymbotus platyurus, Hemidactylus frenatus, and Gehyra mutilata) was infested by Geckobia mites. There are new seven spesies of Geckobia (G4, G5, G6, G7, G10, G11, and G12). Analysis of the presence of mites done by calculate the value of prevalence (P), the average intensity of infestation (I), and the total intensity (It). The prevalence in C. Platyurus gecko (P = 74.38%) is higher than G. mutilata (P = 50%), and H. frenatus (P = 33.33%), while the average infestation intensity (I) and total intensity (It) is the highest found in G. mutilata (I = 10 and It = 11). Geckobia G4 and Geckobia G10 were found only on C. platyurus; Geckobia G5 and Geckobia G12 were found on C. platyurus and G. mutilata; Geckobia G6 were found on whole infected gecko; Geckobia G7 were found on C. platyurus and H. frenatus; and Geckobia G11 were found on H. frenatus and G. mutilata. So it is concluded that the new seven species mites has not a specific distribution pattern of their hosts.
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Judul: Natrium lignosulfonat sebagai agen pendispersi pada mortar
Abstrak: Lignosulphonate, a modification product of lignin waste from pulp and paper industry can be used as water reducer in mortar mixture. This substance can influence the mechanical characteristic of mortar such as diameter of flow, flexural strength, compressive strength, and setting time of cement paste. Lignosulphonate shows it function as dispersant on cement hydration at 3 days that analyzed with x-ray difractometer. Research result show that flow of fresh mortar rise with increase concentration (from weight of cement) of synthetic sodium lignosulphonate (NaLS). It show that mortar homogenity also increasing. The result of flexural strength and compressive strength test use synthetic NaLS 0.1-0.3% from weight of cement show that addition synthetic NaLS 0.2% is the best result because it has the biggest of flexural strenght and compressive strength value. Initial setting time of cement paste increase, about 50% with addition of synthetic NaLS 0.2%. Whereas the final setting time decrease, about 8%. Cement hydration test show increase hydration product peak, Ca(OH)2 dan calcium silicate hydrate (C-S-H).
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