Judul: Rancang Bangun Alat Distilator Pemisah Air Tawar dan Garam Bertenaga Surya dengan Reflektor Tipe Parabola
Abstrak: Indonesia merupakan negara kepulauan yang memiliki garis pantai yang panjang. Salah satu masalah yang dihadapi masyarakat pesisir pantai adalah kekurangan air bersih, oleh karena itu diperlukan teknologi untuk mengolah air laut menjadi air bersih dengan hasil samping garam. Distilasi surya merupakan salah satu cara untuk mengolah air laut menjadi air bersih, dimana air laut dipanaskan sehingga terjadi penguapan dan terjadi pemisahan dari unsur-unsur yang terkandung di dalamnya dengan air tawar. Penelitian ini bertujuan untuk merancang dan menguji kinerja alat distilasi tenaga surya dengan menggunakan reflektor tipe “parabola” untuk menghasilkan air bersih dan garam. Pengujian dilakukan dengan dua perlakuan yaitu posisi reflektor statis dan posisi reflektor dinamis. Setiap perlakuan dilakukan selama 5 hari (8 jam per hari) dengan input air laut 2 l per hari. Hasil uji kinerja alat distilator surya menunjukkan bahwa, perlakuan reflektor statis mencapai nilai efisiensi rata-rata sebesar 4.56 % dan diperoleh produksi rata-rata air pada perlakuan pertama adalah 42.9 ml/jam, sedangkan efisiensi distilator dengan reflektor dinamis mencapai efisiensi ratarata sebesar 7.04 % dan produksi air rata-rata sebesar 46.7 ml/jam. Nilai efisiensi tersebut menunjukkan bahwa pergerakan reflektor “parabola” mengikuti arah datang sinar matahari berpengaruh terhadap peningkatan efisiensi distilator surya. Kualitas air hasil sudah memenuhi standar yang tercantum dalam Peraturan Menteri Kesehatan Republik Indonesia Nomor 492/MENKES/PER/IV/2010 tentang persyaratan kualitas air minum kecuali untuk parameter aluminium dan amonia.
Keyword: air laut, air tawar, distilasi, energi surya

Judul: Desain alat destilasi air laut dengan sumber energi tenaga surya sebagai alternatif penyediaan air bersih
Abstrak: Tujuan penelitian ini adalah merancang alat destilasi air laut dengan sumber energi tenaga surya tanpa kolektor dan dengan kolektor, menguji kinerja alat destilasi air laut dengan sumber energi tenaga surya dan mengetahui faktor yang mempengaruhi produktivitas alat, mengetahui kualitas air yang dihasilkan dari proses kerja alat
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Judul: Phylogeography and Species Limits in the Papuan White Snake (Micropechis ikaheka) (Reptilia: Serpentes: Elapidae)
Abstrak: Papua white snake, Micropechis ikaheka, has been distingushed into two subspecies M.i. ikaheka and M.i. fasciatus. However, due to lack of data on their morphology, distribution and ecology, both subspecies often ignored in scintific discussions and refers only byas , Micropechis ikaheka. This study was designed to document the differences between M.i. ikaheka and M.i fasciatus by using scales characteristics and reproductive organ or hemipenes. The study also examine, zoogeography, habitat, diet and cannibalism of both subspecies to better understanding the the ecology of one of the most venomous snakes in the world. This study consists of three topics with method and also different in the size samples, respectively. The first study is the histology and microtopography of the skin were studied using paraffin method and Scanning Electron Microscope (SEM). The second is the hemipenis were examined by following Myers and Cadle (2003), and Zaher and Prudente (2003). The third is the abdominal surgery was carried out to document diet type and the investigate phenomenon of cannibalism in the snake. Specimens for this study came from the collection from Museum Zoologicum Bogoriense (MZB) and Universitas Negeri Papua’s Laboratory (LZU). The research result also indicated that the markers of skin and hemipenis described the same structure and microornamentation in all M. ikaheka groups being compared. Based specimens examined morphological descriptions do not s support the further differentiation in Micropechis. In short, two markers that used in this study could not sufficiently indicate the differences in the level of species and subspecies of M. ikaheka. The study, however, were able to delineate zoogeography and skin color patterns, which fall into four groups: M. i. ikaheka; M. i. fasciatus. M. i. ssp. “intermediate”; and M. i. ssp “black”. This study also revealed that color variations did not overlap in their geographic distribution. It is therefore, it suggested that environmental factors may contribute to the skin color variations. It also assumed that habitat discontinuous and biogeography factors may also cause the loss of the connection between the original populations (vicarians) or follow colonization events (dispersal). The examined of 22 stomach contents of M. ikaheka shows this species is carnivorous, and prey on vertebrates such as amphibians, fish, reptiles, and Mammals. These snakes are opportunistic predators since they prey on all that can be captured, but mainly reptiles (61.5%), followed by mammals and fish (both 15.4%), and amphibians (7.7%). Although categorized as terrestrial animal, the diet study showed that M. ikaheka snakes often go into the water to hunt for fish (the sample from Yapen island), including eel (the sample from Aru island). Based on prey items indentified, there is evidence that M. ikaheka is cannibal. At this time, there still no record on reason for cannibalism, but it is assumed that cannibalism was due to competition between populations and means to control population.
Keyword: geographic variation, white snake, papua