Prof. Asim Bej Profile

Prof. Asim Bej

Professor

SPIE Involvement:

Author

Proceedings Article | 23 September 2011 Paper

Spectral profiling and imaging (SPI): extending L.I.F.E. technology for the remote exploration of life in ice caves (R.E.L.I.C.) on Earth and Mars

Michael Storrie-Lombardi, Alex Hall, Steven Hang, Gregory Lyzenga, Christopher Clark, Birgit Sattler, Asim Bej, Richard Hoover

Proceedings Volume 8152, 815217 (2011) https://doi.org/10.1117/12.916987

KEYWORDS: Luminescence, Reflectivity, Mars, Microorganisms, Robotics, Raman spectroscopy, Bacteria, Profiling, Imaging systems, Organisms

Read Abstract +

Proceedings Article | 7 September 2010 Paper

Comparison of the microbial diversity and abundance between the freshwater land-locked lakes of Schirmacher Oasis, and the perennially ice-covered Lake Untersee in East Antarctica

Jonathan Huang, Richard Hoover, Ashit Swain, Chris Murdock, Dale Andersen, Asim Bej

Proceedings Volume 7819, 78190W (2010) https://doi.org/10.1117/12.863131

KEYWORDS: Microorganisms, Water, Bacteria, Ecosystems, Astrobiology, Solar radiation, In situ metrology, Ultraviolet radiation, Plating, Analytical research

Read Abstract +

Proceedings Article | 11 September 2009 Paper

Diversity of bacterial communities in the lakes of Schirmacher Oasis, Antarctica

Nazia Mojib, Jonathan Huang, Richard Hoover, Elena Pikuta, Michael Storrie-Lombardi, Birgit Sattler, Dale Andersen, Asim Bej

Proceedings Volume 7441, 74410J (2009) https://doi.org/10.1117/12.831289

KEYWORDS: Bacteria, Microorganisms, Water, Ecosystems, Liquids, Aerospace engineering, Geology, Biological research, Taxonomy, Astrobiology

Read Abstract +

Proceedings Article | 2 September 2008 Paper

Microbial extremophiles from the 2008 Schirmacher Oasis Expedition: preliminary results

Richard Hoover, Elena Pikuta, Alisa Townsend, Joshua Anthony, Melissa Guisler, Jasmine McDaniel, Asim Bej, Michael Storrie-Lombardi

Proceedings Volume 7097, 70970L (2008) https://doi.org/10.1117/12.801018

KEYWORDS: Bacteria, Astrobiology, Reconnaissance, Liquids, Minerals, Microorganisms, Yeast, Methane, Aerospace engineering, Mars

Read Abstract +

Among the most interesting targets for Astrobiology research are the polar ice caps and the permafrost of Mars and the ice and liquid water bodies that may lie beneath the frozen crusts of comets, the icy moons of Jupiter (Europa, Io and Ganymede) and Saturn (Titan and Enceladus). The permanently ice-covered lakes of Antarctica, such as Lake Vostok and Lake Untersee, provide some of the best terrestrial analogues for these targets. The 2008 International Tawani Schirmacher Oasis/Lake Untersee Expeditions have been organized to conduct studies of novel microbial extremophiles and investigate the biodiversity of the glaciers and ice-covered lakes of Dronning Maud Land, East Antarctica. This paper describes the preliminary analysis of the anaerobic microbial extremophiles isolated from samples collected during the 2008 International Schirmacher Oasis Antarctica Reconnaissance Expedition. These samples showed great diversity of psychrophlic and psychrotolerant bacteria. Six new anaerobic strains have been isolated in pure cultures and partially characterized. Two of them (strains ARHSd-7G and ARHSd-9G) were isolated from a small tidal pool near the colony of African Penguins Spheniscus demersus. Strain ARHSd-7G was isolated on mineral anaerobic medium with 3 % NaCl, pH 7 and D-glucose, it has motile, vibrion shape cells, and is Gram variable. Strain ARHSd-9G grew on anaerobic, alkaline medium with pH 9 and 1 % NaCl at 3°C. The substrate was D-glucose supplemented with yeast extract (0.05 %). Cells of strain ARHSd-9G had morphology of straight or slightly curved elongated rods and demonstrated unusual optical effects under dark-field visible light microscopy. The cells were spore-forming and Gram positive. From the mat sample collected near Lake Zub, the new strain LZ-3 was isolated in pure culture at 3°C. Strain LZ-3 was anaerobic and grew on 0.5 % NaCl mineral medium with Dglucose as a substrate. The gram positive cells were spore-forming. They exhibited a distinctive morphology of large rods with rounded ends and size 1x10 μm. From the sample of ice sculpted by wind and melting by solar heating, containing many entrained black rocks collected near Lake Podprudnoye the new strain ISLP-22 was isolated in pure culture. The cells of this strain had vibrion shape and were spore-forming and had "baseball bat" shapes). This culture preferred 0.1 % NaCl mineral anaerobic medium and grew rapidly at 3 °C. Currently, all strains are under physiological study and phylogenetic analysis.

Proceedings Article | 2 September 2008 Paper

Diversity and cold adaptation of microorganisms isolated from the Schirmacher Oasis, Antarctica

Nazia Mojib, Asim Bej, Richard Hoover

Proceedings Volume 7097, 70970K (2008) https://doi.org/10.1117/12.795394

KEYWORDS: Microorganisms, Proteins, Statistical analysis, Tolerancing, Biological research, Solar radiation, Ultraviolet radiation, Biology, Aerospace engineering, Oceanography

Read Abstract +

Conference Committee Involvement (5)

Instruments, Methods, and Missions for Astrobiology XVI

27 August 2013 | San Diego, California, United States

Instruments, Methods, and Missions for Astrobiology XIV

23 August 2011 | San Diego, California, United States

Instruments, Methods, and Missions for Astrobiology XIII

3 August 2010 | San Diego, California, United States

Instruments, Methods, and Missions for Astrobiology XII

4 August 2009 | San Diego, California, United States

Instruments, Methods, and Missions for Astrobiology XI

12 August 2008 | San Diego, California, United States

Keywords/Phrases

Search In:

Publication Years