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Dr. Maier investigates of the ability of bacteria to survive in extremely oligotrophic environments and development of a fundamental understanding of the biological factors and processes influencing the transport and fate of bacteria and contaminants in the environment. Also the study of microbial surfactants (biosurfactants) including discovery of new biosurfactants, elucidation of the role of biosurfactants in microbial survival, and the development of potential biomedical and environmental applications for these fascinating molecules.
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Courses
- EMEnvironmental Microbiology
- BPSGBiodegradation of Pollutants in Soil and Groundwater
Grants
- Bioinspired Green Glycolipids As Fugitive Dust Mitigation Agents
Principal Investigator (PI)
2022
$56.7K
Active - Exposures, Health Impacts, and Risk for Mine Waste Contamination
Principal Investigator (PI)
2020
$8.9M
Active - Novel Rhamnolipid Surfactants for (Recovery of Critical Elements and) Remediation of Metal Contaminated Waste Streams
Principal Investigator (PI)
2020
$368.7K
Active - Exposures, Health Impacts, and Risk for Mine Waste Contamination
Principal Investigator (PI)
2020
$15.3K
Active - Center for Environmentally Sustainable Mining (CESM) Membership Agreement
Co-Investigator (COI)
2019
$400.0K
Active - Sustainable Bioeconomy for Arid Regions (SBAR)
Co-Investigator (COI)
2017
$14.8M
Active - Green Bioinspired Glycolipids as Multi-Purpose Agrichemicals
Co-Investigator (COI)
2023
$649.7K
- Regulation of Metals Emissions from Power Plants
Principal Investigator (PI)
2021
$17.7K
- Center for Environmentally Sustainable Mining (CESM) Membership Agreement
Co-Investigator (COI)
2020
$40.0K
- Glycolipids as Inexpensive Solid Supported Ligands for Uranium Remediation
Principal Investigator (PI)
2019
$56.6K
Technologies / Patents
News
- College of Science Lecture Series returns in person to delve into the mineral world
2022
- Superfund Research Center Receives $10.6M to Study Mining Waste, Arsenic-Diabetes Link
2020
- 12 UA Graduate Students Named Carson Scholars
2018
- Metal Mining Waste Focus of $3.27M UA Superfund Research Program
2018
- UA Research goes from Idea to Patent to Market
2015
- UA, Community Leaders Shape World Via Ideas
2015
- UA Experts Can Offer Expertise on Issues Related to Mining Spills
2015
- UA, UNAM Discuss Mining Collaboration
2015
- From Grad School to Startup
2014
- Catapulting UA Discoveries to the World
2014
- 35 Wildcats Earn NSF Graduate Research Fellowships
2013
- A Living Desert Underground
2013
- Kartchner Caverns: A Living Microbe Laboratory
2011
- Vanishing Water and Shifting Climate
2010
- How Microbes Eat Rocks
2010
- UA Superfund Research Program Receives $14 Million To Study Contaminated Dust, Water
2010
- Interdisciplinary UA, NAU Team Receives $3.3 million to Study Biosurfactants
2007
- Grant to UA Makes Kartchner Caverns a Microbial Observatory
2006
- Water Quality a Major Focus of $14 Million Grant to UA
2005
- Not finding life? Dig deeper
2005
- UA Licenses Patent for Natural Fungicide
2004
Publications (140)
Recent
- Comparison of synthetic rhamnolipids as chemical precipitants for Pb, La, and Mg
2023
- Soil microbial community and abiotic soil properties influence Zn and Cd hyperaccumulation differently in Arabidopsis halleri
2022
- Progressive belowground soil development associated with sustainable plant establishment during copper mine waste revegetation
2022
- Removal of uranium from contaminated groundwater using monorhamnolipids and ion flotation
2022
- Double-Network Hydrogel: A Potential Practical Adsorbent for Critical Metals Extraction and Recovery from Water
2022
- Metal Lability and Mass Transfer Response to Direct-Planting Phytostabilization of Pyritic Mine Tailings
2022
- Alleviating Environmental Health Disparities Through Community Science and Data Integration
2021
- Recovery of Critical Metals from Aqueous Sources
2021
- Arid Ecosystem Vegetation Canopy-Gap Dichotomy: Influence on Soil Microbial Composition and Nutrient Cycling Functional Potential
2021
- Contrasting Community Assembly Forces Drive Microbial Structural and Potential Functional Responses to Precipitation in an Incipient Soil System
2021
- Arsenic and iron speciation and mobilization during phytostabilization of pyritic mine tailings
2020
- Biodegradability and toxicity of cellobiosides and melibiosides
2020
- Life-history strategies of soil microbial communities in an arid ecosystem
2020
- New soil, old plants, and ubiquitous microbes: Evaluating the potential of incipient basaltic soil to support native plant growth and influence belowground soil microbial community composition
2020
- Uptake and fractionation of thallium by Brassica juncea in geogenic thallium-amended substrate
2019
- Effect of Re-acidification on Buffalo Grass Rhizosphere and Bulk Microbial Communities During Phytostabilization of Metalliferous Mine Tailings
2019
- Ecosystem-bedrock interaction changes nutrient compartmentalization during early oxidative weathering
2019
- Soil Microbiome Dynamics During Pyritic Mine Tailing Phytostabilization: Understanding Microbial Bioindicators of Soil Acidification
2019
- Biodegradability and toxicity of monorhamnolipid biosurfactant diastereomers
2019
- Assessing Microbial Community Patterns During Incipient Soil Formation From Basalt
2019
- Ion Flotation of La3+, Cd2+, and Cs+ using Monorhamnolipid Collector
2018
- Ion Flotation of La3+, Cd2+ and Cs+ using monorhamnolipid collector
2018
- Plants from the abandoned Nacozari mine tailings: evaluation of their phytostabilization potential
2017
- Synthesis and Characterization of Four Diastereomers of Monorhamnolipids
2017
- Bacterial Rhizoplane Colonization Patterns of Buchloe dactyloides Growing in Metalliferous Mine Tailings Reflect Plant Status and Biogeochemical Conditions
2017
- Mechanisms of arsenic sequestration by Prosopis juliflora during phytostabilization of metalliferous mine tailings
2017
- Treatment impacts on temporal microbial community dynamics during phytostabilization of acid-generating mine tailings in semiarid regions
2017
- Ecosystem Composition Controls the Fate of Rare Earth Elements during Incipient Soil Genesis
2017
- Rhamnolipid biosurfactant complexation of rare earth elements
2017
- Evolution of aggregate structure in solutions of anionic monorhamnolipids: experimental and computational results
2017
- Significant Impacts of Increasing Aridity on the Arid Soil Microbiome
2017
- Transferable Training Modules Building Environmental Education Opportunities With and for Mexican Community Health Workers (Promotores de Salud)
2017
- Soil Lysimeter Excavation for Coupled Hydrological, Geochemical, and Microbiological Investigations
2016
- Resolving colocalization of bacteria and metal(loid)s on plant root surfaces by combining fluorescence in situ hybridization (FISH) with multiple-energy micro-focused X-ray fluorescence (ME μXRF)
2016
- Bacterial microbiota of the upper respiratory tract and childhood asthma
2016
- Innate Immunity and Asthma Risk in Amish and Hutterite Farm Children
2016
- Phytostabillization of mine tailings using compost-assisted direct planting: Translating greenhouse results ot the field
2016
- Mineral nutrient mobilization by plants from rock: Influence of rock type and arbuscular mycorrhiza
2015
- Assessing fungal community structure from mineral surfaces in Kartchner Caverns using multiplexed 454 pyrosequencing
2015
- Toxic metal(loid) speciation during weathering of iron sulfide mine tailings under semi-arid climate
2015
- Abundance and Activity of 16S rRNA, AmoA and NifH Bacterial Genes During Assisted Phytostabilization of Mine Tailings
2015
- Building a co-created citizen science program with gardeners neighboring a superfund site: The Gardenroots case study
2015
- The NIEHS Superfund Research Program: 25 Years of Translational Research for Public Health
2015
- Building a Co-CreatedCitizen Science Program with Gardeners Neighboring a Superfund Site: The Gardenroots Case Study
2014
- Environmental Research Translation: Enhancing interactions with communities at contaminated sites
2014
- Socially responsible mining: the relationship between mining and poverty, human health and the environment
2014
- Effect of fatty acid substrate chain length on Pseudomonas aeruginosa ATCC 9027 monorhamnolipid yield and congener distribution
2014
- Surficial weathering of iron sulfide mine tailings under semi-arid climate
2014
- Environmental factors influencing the structural dynamics of soil microbial communities during assisted phytostabilization of acid-generating mine tailings: A mesocosm experiment.
2014
- Making a living while starving in the dark: metagenomic insights into the energy dynamics of a carbonate cave
2014
- Mining and environmental educational modules for Tribal Colleges
2014
- Analysis of artifacts limiting the use of DGGE for quantitative diversity analysis
2013
- Analysis of artifacts suggests DGGE should not be used for quantitative diversity analysis
2013
- Home gardening near a mining site in an arsenic-endemic region of Arizona: assessing arsenic exposure dose and risk via ingestion of home garden vegetables, soils, and water
2013
- Phytotechnologies--preventing exposures, improving public health
2013
- A greenhouse and field-based study to determine the accumulation of arsenic in common homegrown vegetables grown in mining-affected soils
2013
- Profiling Bacterial Diversity and Taxonomic Composition on Speleothem Surfaces in Kartchner Caverns, AZ
2013
- Erosive processes in the Presa I mine dam at Nacozari de Garcia, Sonora, and their effect in the dispersion of pollutants
2013
- A new standard-based polynomial interpolation (SBPln) method to address gel-to-gel variability for the comparison of multiple denaturing gradient gel electrophoresis profile matrices
2013
- Phytotechnologies - Preventing Exposures, Improving Public Health
2013
- Mining and Environmental Educational Modules for Tribal Community Colleges and Universities
2013
- Fatty acid cosubstrates provide β-oxidation precursors for rhamnolipid biosynthesis in Pseudomonas aeruginosa, as evidenced by isotope tracing and gene expression assays
2012
- Factors Influencing Observed Variations in the Structure of Bacterial Communities On Calcite Formations in Kartchner Caverns, AZ, USA
2012
- Life at the hyperarid margin: novel bacterial diversity in arid soils of the Atacama Desert, Chile
2012
- Geochemical weathering increases lead bioaccessibility in semi-arid mine tailings
2012
- Response of key soil parameters during compost-assisted phytostabilization in extremely acidic tailings: Effect of plant species
2012
- Bacterial and archaeal community structure of two adjacent calcite speleothems in Kartchner Caverns, Arizona, USA
2011
- Changes in zinc speciation with mine tailings acidification in a semiarid weathering environment
2011
- Fungal communities on speleothem surfaces in Kartchner caverns, Arizona, USA
2011
- Effect of arbuscular mycorrhizal fungi on plant biomass and the rhizosphere microbial community structure of mesquite grown in acidic lead/zinc mine tailings
2011
- Proteomics analyses of the opportunistic pathogen Burkholderia vietnamiensis using protein fractionations and mass spectrometry
2011
- Growth of Quailbush in Acidic, Metalliferous Desert Mine Tailings: Effect of Azospirillum brasilense Sp6 on Biomass Production and Rhizosphere Community Structure
2010
- Evaporative deposition of bacteria and microspheres on mica from a sessile drop: The use of surface conditioning in a laboratory atmosphere to control drop spreading and particle deposition patterns
2010
- Environmental determinants of and impact on childhood asthma by the bacterial community in household dust
2010
- Bacillus pumilus ES4: Candidate plant growth-promoting bacterium to enhance establishment of plants in mine tailings
2010
- Evaporative deposition of bacteria from a sessile drop: Effects of suspension aging
2010
- Evaporative deposition patterns of bacteria from a sessile drop: effect of changes in surface wettability due to exposure to a laboratory atmosphere
2010
- Cadmium effects on transcriptional expression of rhlB/rhlC genes and congener distribution of monorhamnolipid and dirhamnolipid in Pseudomonas aeruginosa IGB83
2010
- Synthesis and biological activities of flavolipids
2010
- Immunological Methods
2009
- Extreme Environments
2009
- Consequences of Biogeochemical Cycles Gone Wild
2009
- Molecular characterization and in situ quantification of anoxic arsenite-oxidizing denitrifying enrichment cultures
2009
- Biogeochemical Cycling
2009
- Optimization of Plant Growth-Promoting Bacteria-Assisted Phytostabilization of Mine Tailings
2009
- Bacterial Growth
2009
- Changes in lead and zinc lability during weathering-induced acidification of desert mine tailings: Coupling chemical and micro-scale analyses
2009
- Effects of compost on colonization of roots of plants grown in metalliferous mine tailings, as examined by fluorescence in situ hybridization
2009
- Aquatic Environments
2009
- The impact of unconfined mine tailings in residential areas from a mining town in a semi-arid environment: Nacozari, Sonora, Mexico
2009
- Nucleic Acid-Based Methods of Analysis
2009
- Microorganisms and Organic Pollutants
2009
- Physiological Methods
2009
- Characterization of a bacterial community in an abandoned semiarid lead-zinc mine tailing site
2008
- Plant growth-promoting bacteria for phytostabilization of mine tailings
2008
- Phytoremediation of mine tailings in temperate and arid environments
2008
- Phytostabilization of mine tailings in arid and semiarid environments - An emerging remediation technology
2008
- Culturable microbial diversity and the impact of tourism in Kartchner Caverns, Arizona
2007
- Influence of a nonaqueous phase liquid (NAPL) on biodegradation of phenanthrene
2006
- Directly measuring the adhesive and elastic properties of bacteria using a surface force apparatus: Effect of desiccation
2006
- Structure and Characterization of Flavolipids, a Novel Class of Biosurfactants Produced by Flavobacterium sp. Strain MTN11
2004
- Flavolipid biosurfactants
2004
- Bacterially derived biopolymers as wood adhesives
2004
- Comparative electrochemical inactivation of bacteria and bacteriophage
2003
- Distribution of biosurfactant-producing bacteria in undisturbed and contaminated arid southwestern soils
2003
- Biosurfactants: Evolution and diversity in bacteria
2003
- Impact of metals on the biodegradation of organic pollutants
2003
- Issues underlying use of biosensors to measure metal bioavailability
2003
- Effect of temperature, pH, and initial cell number on luxCDABE and nah gene expression during naphthalene and salicylate catabolism in the bioreporter organism Pseudomonas putida RB1353
2003
- Characterization of lead removal from contaminated soils by nontoxic soil-washing agents
2003
- Effect of pH on cadmium toxicity, speciation, and accumulation during naphthalene biodegradation
2002
- Stability constants for the complexation of various metals with a rhamnolipid biosurfactant
2001
- Remediation of metal-contaminated soil and sludge using biosurfactant technology
2001
- A rhamnolipid biosurfactant reduces cadmium toxicity during naphthalene biodegradation
2000
- Rhamnolipid-enhanced mineralization of phenanthrene in organic-metal co-contaminated soils
2000
- Pseudomonas aeruginosa rhamnolipids: Biosynthesis and potential applications
2000
- Rhamnolipid-induced removal of lipopolysaccharide from Pseudomonas aeruginosa: Effect on cell surface properties and interaction with hydrophobic substrates
2000
- Development of an agar lift-DNA/DNA hybridization technique for use in visualization of the spatial distribution of Eubacteria on soil surfaces
1999
- Factors influencing expression of luxCDABE and nah genes in Pseudomonas putida RB1353(NAH7, pUTK9) in dynamic systems
1999
- The Pseudomonas aeruginosa rhlG gene encodes an NADPH-dependent β- ketoacyl reductase which is specifically involved in rhamnolipid synthesis
1998
- Biosurfactant (Rhamnolipid) sorption and the impact on rhamnolipid- facilitated removal of cadmium from various soils under saturated flow conditions
1998
- Application of a modified drop-collapse technique for surfactant quantitation and screening of biosurfactant-producing microorganisms
1998
- Their identity and potential efficacy in the biological control of zoosporic plant pathogens
1997
- Rhamnolipid (biosurfactant) effects on cell aggregation and biodegradation of residual hexadecane under saturated flow conditions
1997
- Selection and partial characterization of a Pseudomonas aeruginosa mono- rhamnolipid deficient mutant
1997
- Formation and removal of hydrocarbon residual in porous media: Effects of attached bacteria and biosurfactants
1997
- Effect of rhamnolipids on the dissolution, bioavailability, and biodegradation of phenanthrene
1997
- Effect of application solvents on heterotrophic and nitrifying populations in soil microcosms
1997
- Effect of rhamnolipid (biosurfactant) structure on solubilization and biodegradation of n-alkanes
1995
- Removal of cadmium, lead, and zinc from soil by a rhamnolipid biosurfactant
1995
- Electron microscopy of rhamnolipid (biosurfactant) morphology: effects of pH, cadmium, and octadecane
1995
- Biosurfactant-facilitated remediation of metal-contaminated soils
1995
- Effect of a Pseudomonas rhamnolipid biosurfactant on cell hydrophobicity and biodegradation of octadecane
1994
- Effect of four alcohols on adsorption, desorption, and movement of cadmium, nickel, and zinc through soils
1992
- Enhanced octadecane dispersion and biodegradation by a Pseudomonas rhamnolipid surfactant (biosurfactant)
1992
- Reduction (dethiolation) of protein mixed-disulfides; distribution and specificity of dethiolating enzymes and N,N′-bis(2-chloroethyl)-N-nitrosourea inhibition of an NADPH-dependent cardiac dethiolase
1991
- Phosphorylase and creatine kinase modification by thiol-disulfide exchange and by xanthine oxidase-initiated S-thiolation
1990
- Photolysis primes biodegradation of benzo[a]pyrene
1988
- Sequential degradation of chlorophenols by photolytic and microbial treatment
1988