Judul: Penapisan Bakteri Resisten Terhadap Merkuri sebagai Alternatif Agen Bioremediasi pada Pencemaran Tanah Pertambangan
Abstrak: Heavy metal pollution of mercury (Hg) in soil and water are very harmful to the environment and human health. Mercury compounds in the form of Hg (II) can be bound to the cysteine residues of proteins of human / animal so that the protein loses its activity. This research was expected to help provide solutions to environmental problems caused by environmental pollution, especially mercury around industries that use mercury and as information on the type of bacteria that were resistant to mercury. Mercury-resistant bacteria are a biological agent that can degrade the mercury from Hg2+ to Hg which has un harmful properties to the environment and health. There are two mercury-resistant bacteria that had isolated from gold mine waste disposal areas of PT.ANTAM. The bacteria were cultivated on solid media supplemented with 1 μg/mL and 10 μg/mL HgCl2. Identification of two mercury-resistant bacteria had through the morphology test and biochemical assay, were compared with the Bergey's Manual of Determinative Bacteriology. Enterobacter sp. decreased consentration of HgCl2 in the media of 3.3 ppm after three days incubation, whereas the Bacillus sp. showed a decrease of 0.9 ppm. Bacillus sp. better than the Enterobacter sp. as a bioremediation agent for the level of resistance to antibiotics lower so it was easy to control.
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Judul: Bioremediation of mercury using indigenous bacteria with bioreactor and artificial wetland systems
Abstrak: Sulawesi Province, operated since 1998, utilizes mercury in processing gold material and creates mercury waste that pollutes rivers, soil, plants, and air in the area. Sample data of 2002 to 2006 showed that there were mercury pollution in the area. Bioremediation using microbe is a more effective and efficient technology for cleaning of mercury contaminated environment. This experiment was aimed to: (1) identify, characterize and test the mercury-reducing bacteria from SSGM Talawaan-Tatelu; (2) study the ability of bioreactor and artificial wetland using the mercury-reducing bacteria from SSGM, active carbon, aquatic plant (Typha sp. and Eichornia crassipes) in reducing mercury during 6 days biofilm formation. The experiment was carried out in Indonesian Center for Biodiversity and Biotechnology (ICBB) Laboratory, Bogor. Soil sample was taken collected from SSGM Manado. The results of the experiments revealed that there were 10 superior isolates of mercury-reducing bacteria that were able to grow in Luria Bertani medium containing 500 ppm HgCl2. Those identified as Bacillus sp. group were ICBB 9116, ICBB 9118, ICBB 9121, and ICBB 9122. There were two isolates of Brevibacillus sp. group, namely ICBB 9123 and ICBB 9124; and one isolate for each of Micrococcos luteus, Pseudomonas sp, Morganella morganii, Eschericia coli were ICBB 9120, ICBB 9115, ICBB 9119, ICBB 9117, respectively. The top four highest capability of isolates in reducing mercury, are as follows i.e. ICBB 9120 can reduce 79.42% - 98.65%, ICBB 9119 (80.10% - 97.06%), ICBB 9118 (80.60% - 98.62%), and ICBB 9121 (79.15% - 98.50%). Mercury reduction capability in bioreactor using isolate ICBB 9118 was 98.89%, ICBB 9119 was 98.73%, ICBB 9120 was 99.12%, and ICBB 9121 was 99.33%. The observation results showed that Bacillus sp. ICBB 9121 had the highest capacity in reducing mercury. Typha plant, carbon active, and water hyacinth were used simultaneously with microbes within bioreactor showed their ability in reducing mercury with the level of 98.50%, 97.96%, and 96.73, respectively. The experiment results of artificial wetland reactor demonstrated that the capacity of active carbon, typha plant, and water hyacinth, in reducing mercury without microbes were 85.34%, 82.18%, and 44.25%, respectively.
Keyword: mercury-reducing bacteria, bioreactor, artificial wetland

Judul: Penerbangan Otomatis Pesawat Tanpa Awak Jenis Sayap Tetap dengan iNav
Abstrak: Pesawat tanpa awak (UAV) dapat dikendalikan secara manual dengan remote control atau secara otomatis dengan flight controller (FC). Salah satu jenis UAV adalah sayap tetap yang memiliki bentuk seperti pesawat terbang pada umumnya. Penelitian ini bertujuan untuk melakukan penerbangan otomatis pada UAV jenis sayap tetap dengan mengkonfigurasi perangkat FC. UAV yang digunakan adalah model SkySurfer X8 dengan bentang sayap 1.4 m. FC yang digunakan adalah Matek F405-Wing yang dikonfigurasi dengan perangkat lunak iNav. Berdasarkan hasil uji terbang, UAV berhasil terbang secara otomatis mengikuti skenario yang diberikan. Skenario terjauh berupa persegi berukuran 600×600 m pada ketinggian 100 m, yang ditempuh dalam waktu sekitar 2 menit dengan kecepatan sekitar 65 km/jam. Diharapkan prosedur perakitan, konfigurasi, operasi, dan hasil data uji terbang dapat menjadi acuan dalam penelitian selanjutnya.
Keyword: iNav, penerbangan otomatis, pesawat tanpa awak, sayap tetap