Judul: Mempelajari Pengaruh Aerasi Mekanis dan Penambahan Filter Arang Tempurung Kelapa terhadap Penurunan Kadar Besi Terlarut dalam Pengolahan Air Sumur
Abstrak: Penelitian ini bertujuan unkuk Mempelajari. pengaruh aerasi mekanis dan penambahan filter arang tempurung kelapa terhadap penurunan kadar besi terlarut dalam pengolahan air sumur. Hasil penelitian ini diharapkan dapat diguna - kan sebagai dasar untuk mendisain alat penjernihan air sumur yang mengandung kadar besi terlarut.
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Judul: Efisiensi Genjer, Kangkung Air, Dan Selada Air Dalam Menurunkan Konsentrasi Logam Resi (Fe) di Dalam Medium Air Tawar
Abstrak: Besi mcrupakan salah satu logam berat yang berbahaya bagi kesehatan manusia. Keracunan besi dapat mengakibatkan gangguan fungsi hati, ginjal, dan juga mcnyebabkan iritasi salman pencernaan. Di perairan, besi dapat menimbulkan berkas karat pada pakaian dan porselin serta mcnimbulkan rasa tidak enak pada air minum dengan konsentrasi standar maksimumnya 0,31 mg/l. Penelitian ini bertujuan mcngetahui efisiensi genjer, kangkung air, dan selada air dalam menurunkan logam besi di perairan tawar. Pengukuran sampel air dilakukan pada hari ke-O, 7, 14. 21, dan 28 dengan menggunakan spektrofiJtometer ultraviolet-sinal' latnpak patin panjang gelombang, 470 11m, Parameter utama yang diukul' aualah Fe terlarut sedangkan parameter pellunjangnya (ldalah suhu, pH, daya hantar listrik, kekeruhan, CO~ bebas, oksigen terlaruL dall kdHltUl1i11l oksigcn biologis. I-Iasil peneiitian menunjukkan bahwa semakin hari konscntrilsi bcsi yang diserap oleh ketiga tallaman semakin banyak. Pada hari ke-28 konsentrasi Fe eli perairan pild" tanHmtln selada air dengan kisaran 0,0002 s<lmpai 0,8025 ppm, sedangkan pada tanaman genjt.!1' (0,000." s<Jlllpai 6,0080 ppm) dan kangkung air (0,0005 sampai 6,0504 ppm). Bcrdasarkan anal isis stalislik11 diketahui babw<J pada hari kc-7, 14, 2!. dan 28 padi! tanalllan genjer, kangkung air, dan selada HiI' lllL'mberi respolls yang nyata dalam menurullkall logam Fe untuk perlakuan 0, 1,5,10, dan 15 ppm. Elisiensi absorbsi Fe paling tinggi teljacli pad a hari kc-28 perlakuan 15 ppm yaitu selada air (94,67%), genjcl' (59,991%)c1an kangkung air (59,66%). Parameter penunjang sepcrti daya hantar listrik, pi-I, oksigen tcrlarul, kebutuhan oksigen biologis bcrpengaruh paela turunnya jumlah Fe eli pcrairan scdangkan suilu. kckcl'uhan, CO:!: be bas tidak berpengaruh.
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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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