Experts and Doctors on biofilms in Tempe, Arizona, United States


Locale: Tempe, Arizona, United States
Topic: biofilms

Top Publications

  1. Repp K, Menor S, Pettit R. Microplate Alamar blue assay for susceptibility testing of Candida albicans biofilms. Med Mycol. 2007;45:603-7 pubmed
    ..88-0.93) and CFU/ml (r=0.93-0.99) for all four C. albicans test strains. This simple, reproducible method for determining in vitro drug susceptibility should facilitate discovery of antifungals active against Candida biofilms. ..
  2. Pettit R, Repp K, Hazen K. Temperature affects the susceptibility of Cryptococcus neoformans biofilms to antifungal agents. Med Mycol. 2010;48:421-6 pubmed publisher
    ..Thus, growth temperature does affect C. neoformans biofilm properties, but factors other than relative biofilm CFUs/ml must be involved in the increased drug susceptibility at 35 degrees C. ..
  3. Wen L, Lai C, Yang Q, Chen J, Zhang Y, Ontiveros Valencia A, et al. Quantitative detection of selenate-reducing bacteria by real-time PCR targeting the selenate reductase gene. Enzyme Microb Technol. 2016;85:19-24 pubmed publisher
    ..Our results demonstrated the feasibility of using the serA gene-based PCR primer set to detect and quantify SeRB in environmental samples. ..
  4. Li G, Park S, Kang D, Krajmalnik Brown R, Rittmann B. 2,4,5-Trichlorophenol degradation using a novel TiO2-coated biofilm carrier: roles of adsorption, photocatalysis, and biodegradation. Environ Sci Technol. 2011;45:8359-67 pubmed publisher
    ..ICPB significantly lowered the diversity of the bacterial community, but five genera known to biodegrade chlorinated phenols (Ralstonia, Bradyrhizobium, Methylobacterium, Cupriavidus, and Pandoraea) were markedly enriched. ..
  5. Li G, Park S, Rittmann B. Degradation of reactive dyes in a photocatalytic circulating-bed biofilm reactor. Biotechnol Bioeng. 2012;109:884-93 pubmed publisher
    ..A proposed ICPB pathway for RB5 suggests that a major intermediate, a naphthol derivative, was responsible for most of the residual COD, while most of the nitrogen in the azo-bonds (-N=N-) was oxidized to N₂. ..
  6. Ziv El M, Popat S, Cai K, Halden R, Krajmalnik Brown R, Rittmann B. Managing methanogens and homoacetogens to promote reductive dechlorination of trichloroethene with direct delivery of H2 in a membrane biofilm reactor. Biotechnol Bioeng. 2012;109:2200-10 pubmed publisher
  7. Wu Y, Li Y, Ontiveros Valencia A, Ordaz Díaz L, Liu J, Zhou C, et al. Enhancing denitrification using a novel in situ membrane biofilm reactor (isMBfR). Water Res. 2017;119:234-241 pubmed publisher
    ..All nitrate removal was accomplished in the "MBfR root zone," where H2 delivery supplemented the COD supply (as needed) and provided the large majority of electron equivalents to reduce nitrate to N2. ..
  8. Boltz J, Smets B, Rittmann B, Van Loosdrecht M, Morgenroth E, Daigger G. From biofilm ecology to reactors: a focused review. Water Sci Technol. 2017;75:1753-1760 pubmed publisher
    ..Biofilm models have become essential tools for fundamental biofilm research and biofilm reactor engineering and design. At the same time, the divergence between biofilm modeling and biofilm reactor modeling approaches is recognized. ..
  9. Lusk B, Parameswaran P, Popat S, Rittmann B, Torres C. The effect of pH and buffer concentration on anode biofilms of Thermincola ferriacetica. Bioelectrochemistry. 2016;112:47-52 pubmed publisher
    ..ferriacetica to produce higher current densities with lower buffer concentrations. ..

More Information


  1. Zhou C, Ontiveros Valencia A, Wang Z, Maldonado J, Zhao H, Krajmalnik Brown R, et al. Palladium Recovery in a H2-Based Membrane Biofilm Reactor: Formation of Pd(0) Nanoparticles through Enzymatic and Autocatalytic Reductions. Environ Sci Technol. 2016;50:2546-55 pubmed publisher
  2. Tang Y, Krajmalnik Brown R, Rittmann B. Modeling trichloroethene reduction in a hydrogen-based biofilm. Water Sci Technol. 2013;68:1158-63 pubmed publisher
    ..Simultaneous low concentrations of nitrate and the three chlorinated ethenes can occur as long as the influent ratio of NO3(-) to TCE is not too large, so that DHC are a significant fraction of the biofilm. ..
  3. Ontiveros Valencia A, Ilhan Z, Kang D, Rittmann B, Krajmalnik Brown R. Phylogenetic analysis of nitrate- and sulfate-reducing bacteria in a hydrogen-fed biofilm. FEMS Microbiol Ecol. 2013;85:158-67 pubmed publisher
    ..Thus, the biofilm community in a H₂-fed biofilm with DB and SRB became more heterotrophic when the H₂ availability was constrained, while low NO₃⁻ loading allowed more SO₄²⁻ reduction, causing a shift to more SRB. ..
  4. Badalamenti J, Torres C, Krajmalnik Brown R. Light-responsive current generation by phototrophically enriched anode biofilms dominated by green sulfur bacteria. Biotechnol Bioeng. 2013;110:1020-7 pubmed publisher
    ..These results invite the utilization of MXCs as microbiological tools for exploring anaerobic respiratory capabilities among anoxygenic photosynthetic bacteria. ..
  5. Miceli J, Parameswaran P, Kang D, Krajmalnik Brown R, Torres C. Enrichment and analysis of anode-respiring bacteria from diverse anaerobic inocula. Environ Sci Technol. 2012;46:10349-55 pubmed publisher
  6. Torres C, Krajmalnik Brown R, Parameswaran P, Marcus A, Wanger G, Gorby Y, et al. Selecting anode-respiring bacteria based on anode potential: phylogenetic, electrochemical, and microscopic characterization. Environ Sci Technol. 2009;43:9519-24 pubmed publisher
    ..Continuous-flow operation and the selective pressure due to low anode potentials selected for G. sulfurreducens, which are known to consume acetate efficiently and use a solid conductive matrix for electron transport...
  7. Torres C, Marcus A, Lee H, Parameswaran P, Krajmalnik Brown R, Rittmann B. A kinetic perspective on extracellular electron transfer by anode-respiring bacteria. FEMS Microbiol Rev. 2010;34:3-17 pubmed publisher
    ..Thus, a study of the biological components that create a solid conductive matrix is of critical importance for understanding the function of ARB. ..
  8. Hasar H, Xia S, Ahn C, Rittmann B. Simultaneous removal of organic matter and nitrogen compounds by an aerobic/anoxic membrane biofilm reactor. Water Res. 2008;42:4109-16 pubmed publisher
    ..The overload of total oxygen demand did not affect COD oxidation in the Aer MBfR, but caused a small increase of COD in the An MBfR due to net release of soluble microbial products (SMP)...
  9. Torres C, Marcus A, Rittmann B. Kinetics of consumption of fermentation products by anode-respiring bacteria. Appl Microbiol Biotechnol. 2007;77:689-97 pubmed
    ..When we provided no electron donor, we measured current due to endogenous decay of biomass (approximately 0.07 A/m(2)) and an open-cell potential (-0.54 V vs Ag/AgCl) associated with biomass components active in endogenous respiration...
  10. Pettit R, Weber C, Kean M, Hoffmann H, Pettit G, Tan R, et al. Microplate Alamar blue assay for Staphylococcus epidermidis biofilm susceptibility testing. Antimicrob Agents Chemother. 2005;49:2612-7 pubmed
  11. Pettit R, Weber C, Pettit G. Application of a high throughput Alamar blue biofilm susceptibility assay to Staphylococcus aureus biofilms. Ann Clin Microbiol Antimicrob. 2009;8:28 pubmed publisher
    ..A standardized biofilm Alamar blue assay should greatly increase the rate of discovery of S. aureus biofilm specific agents. ..
  12. Wilson J, Ott C, H ner zu Bentrup K, Ramamurthy R, Quick L, Porwollik S, et al. Space flight alters bacterial gene expression and virulence and reveals a role for global regulator Hfq. Proc Natl Acad Sci U S A. 2007;104:16299-304 pubmed publisher
    ..Strategies to target Hfq and related regulators could potentially decrease infectious disease risks during space flight missions and provide novel therapeutic options on Earth...
  13. Gao Y, Ryu H, Rittmann B, Hussain A, Lee H. Quantification of the methane concentration using anaerobic oxidation of methane coupled to extracellular electron transfer. Bioresour Technol. 2017;241:979-984 pubmed publisher
    ..97% (R2?0.99) when the measurement was sustained for at least 50min Thus, cumulative coulombs over 50min could be used to quantify the methane concentration in gas samples. ..