A5068139952- Planetary Science and Exploration
- Microbial Community Ecology and Physiology
- Metal Extraction and Bioleaching
- Building materials and conservation
- Geochemistry and Elemental Analysis
- Geology and Paleoclimatology Research
- Microbial Fuel Cells and Bioremediation
- Methane Hydrates and Related Phenomena
- Biocrusts and Microbial Ecology
- Paleontology and Stratigraphy of Fossils
- Genomics and Phylogenetic Studies
- CO2 Sequestration and Geologic Interactions
- Historical and Archaeological Studies
- Identification and Quantification in Food
- Radioactive element chemistry and processing
- Marine Biology and Ecology Research
- Geological Modeling and Analysis
- Geological formations and processes
- Drilling and Well Engineering
- Image Processing and 3D Reconstruction
- Geological Formations and Processes Exploration
Niagara University
2017-2021
University of Delaware
2014-2019
Biotechnology Institute
2016
University of Arkansas at Fayetteville
2010-2013
The Chlorobiales are anoxygenic phototrophs that produce solid, extracellular elemental sulfur globules as an intermediate step in the oxidation of sulfide to sulfate. These organisms must export while preventing cell encrustation during S0 globule formation; degradation they find and mobilize for intracellular To understand how address these challenges, we characterized spatial relationships physical dynamics Chlorobaculum tepidum cells by light electron microscopy. Cba. commonly formed at...
Elemental sulfur (S0) is produced and degraded by a diverse group of microorganisms. For Chlorobaculum tepidum, an anoxygenic phototroph, sulfide oxidized to produce extracellular S0 globules, which can be further sulfate. While some sulfur-oxidizing bacteria (e.g. Al. vinosum) are also capable growth on commercial as electron donor, Cba. tepidum not. Even colloidal sols, appear indistinguishable from biogenic do not support the tepidum. Here, we investigate properties that make globules...
Abstract The permanently stratified water columns in euxinic meromictic lakes produce niche environments for phototrophic sulfur oxidizers and diverse metabolisms. While Green Lake (Fayetteville, New York, NY) is known to host a community of ecologically important bacteria, analyses its microbial communities, date, have been largely based on pigment analysis smaller datasets from Sanger sequencing techniques. Here, we present the results next‐generation eubacterial context column...
The green sulfur bacteria, the Chlorobi, are phototrophic bacteria that oxidize sulfide and deposit extracellular elemental globules [S(0)]. These subsequently consumed after is exhausted. S(0) from a Chlorobaculum tepidum mutant strain were purified used to show wild-type of Cba. can grow on biogenic as sole photosynthetic electron donor, i.e. in medium with no other source reducing power. Growth yields rates comparable those previously determined for grown donor. Contact between cells was...
Rock coatings in Kärkevagge, Swedish Lapland, are widespread and mineralogically diverse. A preliminary study of the rock revealed higher than expected bacterial diversity for an endolithic environment arctic. Using 454 Roche pyrosequencing 16S rRNA gene, nine coating samples from three different mineralogies were sequenced. The types include Fe films goethite hematite, sulfate crusts jarosite gypsum, aluminum glazes basaluminite alunite. Over 20,000 quality sequences analyzed, over 2800...
Abstract Rock coatings have been observed on Mars by Pathfinder, Viking and the Exploration Rovers. Although rock varnish has studied for its potential as a biosignature, other types of coating largely ignored. In Kärkevagge, Swedish Lapland, sulphate crusts, aluminium glazes Fe/Mn films occur with mineralogies mimicking those surface Mars. Molecular analysis scanning electron microscopy (SEM) were used to investigate bacterial communities associated these coatings. techniques revealed...
Research Article| June 01, 2017 Rock Coatings and the Potential for Life on Mars Cassandra L. Marnocha 1 Department of Biology Niagara University Lewiston, NY 14109 USA E-mail: cmarnocha@niagara.edu Search other works by this author on: GSW Google Scholar Author Article Information Publisher: Mineralogical Society America First Online: 29 Nov Online Issn: 1811-5217 Print 1811-5209 Copyright © AmericaMineralogical Elements (2017) 13 (3): 187–191. https://doi.org/10.2113/gselements.13.3.187...
We isolated three Acidithiobacillus sp. strains from an acidic spring in a freshwater wetland. Here, we report the draft genomes of these strains, which were obtained using Illumina-based sequencing technology.